U.S. patent application number 16/535818 was filed with the patent office on 2019-11-28 for data transmission processing method, user equipment, and base station.
The applicant listed for this patent is HUAWEI TECHNOLOGIES CO., LTD.. Invention is credited to Junren CHANG, Shulan FENG, Jinhuan XIA, Xiangdong ZHANG.
Application Number | 20190364539 16/535818 |
Document ID | / |
Family ID | 59224417 |
Filed Date | 2019-11-28 |
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United States Patent
Application |
20190364539 |
Kind Code |
A1 |
CHANG; Junren ; et
al. |
November 28, 2019 |
DATA TRANSMISSION PROCESSING METHOD, USER EQUIPMENT, AND BASE
STATION
Abstract
The present disclosure provides a data transmission processing
method including: receiving first indication information and saving
context information of user equipment according to the first
indication information, where the context information includes
identification information of the user equipment; and decoding a
PDCCH based on the identification information of the user
equipment, to obtain second indication information, where the
second indication information is used to determine that the user
equipment is a paged object or that there is a service of the user
equipment. The indication information meant for the paged object is
carried in the PDCCH, so that the user equipment can determine,
depending on whether the indication information can be successfully
obtained, whether the user equipment is the paged object or has a
service, and perform subsequent processing, for example, connecting
to a network, when determining that the user equipment is the paged
object or has a service.
Inventors: |
CHANG; Junren; (Beijing,
CN) ; FENG; Shulan; (Beijing, CN) ; XIA;
Jinhuan; (Beijing, CN) ; ZHANG; Xiangdong;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HUAWEI TECHNOLOGIES CO., LTD. |
SHENZHEN |
|
CN |
|
|
Family ID: |
59224417 |
Appl. No.: |
16/535818 |
Filed: |
August 8, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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16023353 |
Jun 29, 2018 |
10412705 |
|
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16535818 |
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PCT/CN2015/100312 |
Dec 31, 2015 |
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16023353 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 76/19 20180201;
H04W 68/005 20130101; H04W 68/02 20130101; H04W 76/10 20180201;
H04W 48/12 20130101; H04W 52/0229 20130101; H04W 76/20 20180201;
Y02D 30/70 20200801; H04L 9/0847 20130101 |
International
Class: |
H04W 68/02 20060101
H04W068/02; H04W 76/20 20060101 H04W076/20; H04W 76/19 20060101
H04W076/19; H04W 68/00 20060101 H04W068/00; H04W 76/10 20060101
H04W076/10; H04W 48/12 20060101 H04W048/12; H04L 9/08 20060101
H04L009/08; H04W 52/02 20060101 H04W052/02 |
Claims
1. A method, comprising: receiving, by a user equipment (UE) from a
base station, a radio resource control (RRC) connection suspension
indication message, wherein the RRC connection suspension
indication message comprises an identifier of the UE; storing, by
the UE, the identifier of the UE in context information of the UE;
decoding, by the UE, a physical downlink control channel (PDCCH)
based on the identifier of the UE to obtain a paging message;
restoring, by the UE, according to the paging message, a radio
bearer.
2. The method according to claim 1, wherein the method further
comprises: storing, by the UE, a security key for a data
transmission between the base station and the UE, wherein the
security key is at least one of an encryption key or an integrity
protection key.
3. The method according to claim 1, wherein the method further
comprises: determining, by the UE, a packet data convergence
protocol (PDCP) count for a data transmission between the base
station and the UE, wherein a value of the PDCP count comprises a
hyper frame number (HFN) and a PDCP sequence number (PDCP SN).
4. The method according to claim 1, wherein the method further
comprises: sending, by the UE, according to a contention based
physical uplink shared channel (CB-PUSCH) resource, uplink data
through contention.
5. The method according to claim 1, wherein the method further
comprises: receiving, by the UE, downlink data; decoding, by the
UE, the downlink data by using a security key for a data
transmission between the base station and the UE and a packet data
convergence protocol (PDCP) count for the data transmission between
the base station and the UE.
6. The method according to claim 1, wherein the method further
comprises: receiving, by the UE from the base station, an
identifier of the radio bearer to be stored.
7. An apparatus, comprising: a memory and a processor; wherein the
processor is configured to perform operations comprising: receiving
from a base station, a radio resource control (RRC) connection
suspension indication message, wherein the RRC connection
suspension indication message comprises an identifier of a user
equipment (UE); storing the identifier of the UE in context
information of the UE; decoding a physical downlink control channel
(PDCCH) based on the identifier of the UE to obtain a paging
message; restoring according to the paging message, a radio
bearer.
8. The apparatus according to claim 7, wherein the processor is
further configured to perform operations comprising: storing a
security key for a data transmission between the base station and
the UE, wherein the security key is at least one of an encryption
key or an integrity protection key.
9. The apparatus according to claim 7, wherein the processor is
further configured to perform operations comprising: determining a
packet data convergence protocol (PDCP) count for a data
transmission between the base station and the UE, wherein a value
of the PDCP count comprises a hyper frame number (HFN) and a PDCP
sequence number (PDCP SN).
10. The apparatus according to claim 7, wherein the processor is
further configured to perform operations comprising: sending
according to a contention based physical uplink shared channel
(CB-PUSCH) resource, uplink data through contention.
11. The apparatus according to claim 7, wherein the processor is
further configured to perform operations comprising: receiving
downlink data; decoding the downlink data by using a security key
for a data transmission between the base station and the UE and a
packet data convergence protocol (PDCP) count for the data
transmission between the base station and the UE.
12. The apparatus according to claim 1, wherein the processor is
further configured to perform operations comprising: receiving from
the base station, an identifier of the radio bearer to be
stored.
13. A non-transitory readable medium comprising: a memory; and
program instructions stored in the memory, wherein the program
instructions are configured, when executed, to perform a method
comprising: receiving from a base station, a radio resource control
(RRC) connection suspension indication message, wherein the RRC
connection suspension indication message comprises an identifier of
a user equipment (UE); storing the identifier of the UE in context
information of the UE; decoding a physical downlink control channel
(PDCCH) based on the identifier of the UE to obtain a paging
message; restoring according to the paging message, a radio
bearer.
14. The medium according to claim 13, wherein the method further
comprises: storing a security key for a data transmission between
the base station and the UE, wherein the security key is at least
one of an encryption key or an integrity protection key.
15. The medium according to claim 13, wherein the method further
comprises: determining a packet data convergence protocol (PDCP)
count for a data transmission between the base station and the UE,
wherein a value of the PDCP count comprises a hyper frame number
(HFN) and a PDCP sequence number (PDCP SN).
16. The medium according to claim 13, wherein the method further
comprises: sending according to a contention based physical uplink
shared channel (CB-PUSCH) resource, uplink data through
contention.
17. The medium according to claim 13, wherein the method further
comprises: receiving downlink data; decoding the downlink data
using a security key for a data transmission between the base
station and the UE and a packet data convergence protocol (PDCP)
count for the data transmission between the base station and the
UE.
18. The medium according to claim 13, wherein the method further
comprises: receiving from the base station, an identifier of the
radio bearer to be stored.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 16/023,353, filed on Jun. 29, 2018, which is a
continuation of International Application No. PCT/CN2015/100312,
filed on Dec. 31, 2015, the disclosures of which are hereby
incorporated by reference in their entheties.
TECHNICAL FIELD
[0002] Embodiments of the present disclosure relate to
communications technologies, and in particular, to a data
transmission processing method, user equipment, and a base
station.
BACKGROUND
[0003] Currently, 3GPP has set up a new project called Narrowband
Internet of Things (NB-IoT). An objective of this project is to
further extend a current Long Term Evolution (LTE) system, so as to
support massive low-throughput Internet of Things devices or
massive Internet of Things devices insensitive to a delay
requirement. Ultra-low complexity and ultra-low power consumption
are two key requirements for such Internet of Things devices.
[0004] Terminal devices in conventional LTE systems and Internet of
Things devices in NB-IoT are collectively referred to as user
equipment (UE). The UE is usually in an idle mode when no service
requires transmission. When there is a service requiring data
transmission, the UE changes into a connected mode from the idle
mode.
[0005] Each time when the UE connects to a network because there is
data that may need to be transmitted/received, the UE may need to
perform massive procedures of message exchange with network-side
devices, so as to receive downlink data or transmit uplink data.
The network-side devices mainly include a base station such as an
evolved NodeB (eNB), and core network devices such as a mobility
management entity (MME) and a serving gateway (SGW). A main
objective of the massive message exchange is still to establish a
connection between the UE and the eNB and establish a valid access
stratum context. Therefore, to reduce the massive message exchange
perforated each time when the UE connects to a network, currently,
the 3GPP organization agrees to save access stratum context
information (referred to as context information below), and in
particular, to save some UE-specific access stratum parameters, on
a UE side and an eNB side, so as to reduce radio resource control
(RRC) signaling overheads. This helps quickly connect to the
network based on the context information saved in the UE and the
eNB, to resume data transmission.
[0006] However, currently when the context information of the UE is
saved in the UE and the eNB, and in particular, when the UE has
downlink data that may need to be received, the UE usually
triggers, based on a received paging message, a data transmission
resumption processing process. Therefore, how UE receives a paging
message to further reduce UE power consumption is a problem to be
resolved.
[0007] Currently, UE usually receives a paging message in the
following manner: A paging frame (PF) and a paging occasion (PO)
that are for receiving a paging message first may need to be
calculated. Specifically, one paging occasion may be one subframe.
One paging frame may include a plurality of paging subframes. A PF
and a PO are calculated based on the following formulas.
[0008] A PF is derived by using the following formula. A system
frame number (SFN) that makes the following formula true is
obtained:
SFN mod T=(T div N)*(UE_ID mod N).
[0009] For a PO, i_s is first derived from the following formula,
and then a corresponding PO value is obtained based on the obtained
i_s and a radio access technology of the UE by searching the
following table:
[0010] i_s=floor(UE_ID/N) mod Ns, where
[0011] T is a DRX interval of the UE;
[0012] nB is selected from 4T, 2T, T, T/2, T/4, T/8, T/16, and
T/32;
[0013] N=min(T,nB);
[0014] Ns=max(1,nB/T); and
[0015] UE_ID=IMSI mod I024.
[0016] Generally, radio access technologies for UE include
frequency division duplex (FDD) and time division duplex (TDD).
FDD
TABLE-US-00001 [0017] PO PO PO Ns when i_s = 0 PO when i_s = 1 when
i_s = 2 when i_s = 3 1 9 N/A N/A N/A 2 4 9 N/A N/A 4 0 4 5 9
TDD (All UL/DL Configurations)
TABLE-US-00002 [0018] PO PO PO Ns when i_s = 0 PO when i_s = 1 when
i_s = 2 when i_s = 3 1 0 N/A N/A N/A 2 0 5 N/A N/A 4 0 1 5 6
[0019] After the PF and the PO are determined, the UE decodes a
physical downlink control channel (PDCCH) at the determined PO time
point by using a paging radio network temporary identifier
(P-RNTI), and then receives a paging message from a physical
downlink shared channel (PDSCH) based on a resource indicated by
live PDCCH. When the received paging message includes
identification information of the UE, the UE determines itself as
paged UE, and connects to the network as instructed by the
network.
[0020] It can be learned, front the manner of receiving the paging
message, that after the UE decodes the PDCCH at the PO time point
and further receives the paging message from die PDSCH, the paging
message may not include the identification information of the UE.
In this case, this is false paging for the UE. For UE in NB-IoT or
other UE sensitive to power consumption, excessive false paging
leads to a relatively high waste of power consumption during paging
message detection. Therefore, for UE sensitive to power
consumption, the current paging mechanism is apt to cause wasting
of power consumption of the UE.
SUMMARY
[0021] Embodiments of the present disclosure provide a data
transmission processing method, user equipment, and a base station,
to avoid wasting of UE power consumption by preventing UE,
particularly UE sensitive to power consumption, from receiving a
false paging message.
[0022] A first aspect of the present disclosure provides a data
transmission processing method, where the method is executed by
user equipment, and the method includes:
[0023] receiving, by the user equipment, first indication
information sent by a base station, and saving context information
of the user equipment according to the first indication
information, where the context information includes identification
information of the user equipment; and
[0024] decoding, by the user equipment, a physical downlink control
channel PDCCH based on the identification information of the user
equipment, to obtain second indication information, where the
second indication information is used to determine that the user
equipment is a paged object or that there is a service of the user
equipment.
[0025] With reference to the first aspect, in a first possible
implementation of the first aspect, the decoding, by the user
equipment, a physical downlink control channel PDCCH based on the
identification information of the user equipment, to obtain second
indication information includes:
[0026] if the user equipment correctly decodes a downlink control
information DCI format in the PDCCH based on the identification
information that identifies the user equipment within a range of
the base station or within a range of one or more cells of the base
station, determining that the second indication information is
successfully obtained; or
[0027] decoding, by the user equipment, the PDCCH based on the
identification information that identifies the user equipment
within a range of the base station or within a range of one or more
cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH.
[0028] The foregoing solution has the following technical effects:
The indication information meant for the paged object, namely, the
second indication information, is carried in the PDCCH, so that the
user equipment can determine, depending on whether the indication
information can be successfully obtained, whether the user
equipment is the paged object or has a service, and perform
subsequent processing such as a connection to the network when
determining that the user equipment is the paged object or has a
service. This avoids wasting of UE power consumption.
[0029] With reference to the first aspect or the first possible
implementation of the first aspect, in a second possible
implementation of five first aspect, the method further
includes:
[0030] receiving, by the user equipment, obtaining manner
indication information sent by the base station, where the
obtaining manner indication information is used to indicate an
obtaining manner in which the user equipment obtains the second
indication information; and
[0031] the obtaining manner includes at least two of the following
manners:
[0032] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0033] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0034] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0035] With reference to the first aspect, in a third possible
implementation of the first aspect, the decoding, by the user
equipment, a physical downlink control channel PDCCH based on the
identification information of the user equipment, to obtain second
indication information, where the second indication information is
used to determine that the user equipment is a paged object or that
there is a service of the user equipment includes:
[0036] detecting, by the user equipment, the PDCCH based on a
P-RNTI, to obtain the second indication information, where the
second indication information is paging message scheduling
information; and
[0037] receiving, by the user equipment from a PDSCH and based on
the scheduling information, a paging message corresponding to the
user equipment, and determining, based on the paging message, that
the user equipment is the paged object or that there is a service
of the user equipment.
[0038] The foregoing solution has the following technical effect: A
plurality of optional obtaining manners are provided for obtaining
the indication information meant for the paged object carried in
the PDCCH, improving flexibility of obtainment of the indication
information.
[0039] With reference to any one of the first aspect, or the first
to the third possible implementations of the first aspect, in a
fourth possible implementation of the first aspect, the decoding,
by the user equipment, a physical downlink control channel PDCCH
based on the identification information of the user equipment, to
obtain second indication information includes:
[0040] searching, by the user equipment, common search space CSS or
user equipment specific search space USS, and decoding the DCI
format in the PDCCH by using the identification information of the
user equipment, to obtain the second indication information.
[0041] With reference to any one of the first to the fourth
possible implementations of the first aspect, in a fifth possible
implementation of the first aspect, the DCI format further includes
system information change indication information and/or emergency
service indication information.
[0042] The foregoing solution has the following technical effect:
In addition to the second indication information, the DCI format
may further carry information used to indicate a system information
change, an emergency service, or the like, extending a function of
the DCI format, and enabling the UE to learn the corresponding
indication information accurately in a timely way.
[0043] With reference to any one of the first aspect, or the first
to the fifth possible implementations of the first aspect, in a
sixth possible implementation of the first aspect, the method
further includes:
[0044] sending, by the user equipment, a context information saving
request to the base station when determining that there is no data
that may need to be transmitted/received within a preset time.
[0045] With reference to the sixth possible implementation of the
first aspect, in a seventh possible implementation of the first
aspect, the first indication information is sent by the base
station based on the context information saving request.
[0046] The foregoing solution has the following technical effect:
After determining that the UE has no data that may need to be
transmitted, the base station sends, to the UE, indication
information used to instruct the UE to save the context
information, so that a context information saving occasion and an
actual data transmission case of the UE are matched. This ensures
accuracy and reliability of a context information saving operation
occasion.
[0047] With reference to any one of the first aspect, or the first
to the seventh possible implementations of the first aspect, in an
eighth possible implementation of the first aspect, the receiving,
by the user equipment, first indication information sent by a base
station, and saving context information of the user equipment
according to the first indication information includes:
[0048] saving, according to the first indication information, a
security key used for data transmission between the user equipment
and the base station and a data packet count for at least one radio
bearer, where the security key includes an encryption key and/or an
integrity protection key; and
[0049] after the determining, by the user equipment, that the user
equipment is a paged object or that there is a service of the user
equipment, the method further includes:
[0050] determining, by the user equipment, a radio bearer that may
need to be restored, and performing, by using the security key and
the data packet count for the radio bearer, data transmission meant
for the radio bearer that may need to be restored.
[0051] With reference to the eighth possible implementation of the
first aspect, in a ninth possible implementation of the first
aspect, the performing, by the user equipment by using the security
key and the data packet count for the radio bearer, data
transmission meant for the radio bearer that may need to be
restored includes:
[0052] when determining that there is uplink data that may need to
be sent, generating, by the user equipment, an encryption keystream
by using the security key and the data packet count for the radio
bearer that may need to be restored, and encrypting the uplink data
by using the encryption keystream and sending the encrypted uplink
data to the base station.
[0053] With reference to the ninth possible implementation of the
first aspect, in a tenth possible implementation of the first
aspect, the method further includes:
[0054] when determining that there is uplink data that may need to
be sent, sending, by the user equipment, the uplink data through
contention and based on a contention based physical uplink shared
channel CB-PUSCH resource pre-allocated by the base station.
[0055] With reference to the eighth possible implementation of the
first aspect, in an eleventh possible implementation of the first
aspect, the performing, by the user equipment by using the security
key and the data pocket count for the radio bearer, data
transmission meant for the radio bearer that may need to be
restored includes:
[0056] when determining that there is downlink data that may need
to be received, decoding, by the user equipment, the received
downlink data by using the security key and the data packet count
for the radio bearer that may need to be restored.
[0057] With reference to any one of the eighth to the eleventh
possible implementations of the first aspect, in a twelfth possible
implementation of the first aspect, the method further
includes:
[0058] receiving, by the user equipment, an identifier, sent by the
base station, of the radio bearer that may need to be restored;
and
[0059] determining, by the user equipment based on the identifier
of the radio bearer that may need to be restored, the radio bearer
that may need to be restored.
[0060] The foregoing solution has the following technical effect:
The UE saves, according to the first indication information, the
security key and the data packet count for a plurality of radio
bearers, so that when the UE determines, based on the second
indication information, that the UE has service data that may need
to be transmitted, the uplink data can be transmitted and the
downlink data can be received securely and reliably based on the
saved information.
[0061] With reference to any one of the first aspect, or the first
to the twelfth possible implementations of the first aspect, in a
thirteenth possible implementation of the first aspect, the
decoding, by the user equipment, a physical downlink control
channel PDCCH based on the identification information of the user
equipment, to obtain second indication information includes:
[0062] decoding, by the user equipment, the PDCCH based on the
identification information of the user equipment, to obtain any
piece of second indication information among second indication
information sent by the base station at N different paging
occasions POs corresponding to the user equipment, respectively;
or
[0063] decoding, by the user equipment, the PDCCH based on the
identification information of the user equipment, to obtain N
pieces of second indication information continuously sent by the
base station at one PO corresponding to the user equipment and in
N-1 consecutive subframes subsequent to the PO.
[0064] The foregoing solution has the following technical effect: A
plurality of pieces of second indication information used to
indicate whether the UE is the paged object or has a service are
sent, ensuring paging reliability of the base station. The UE can
determine more accurately whether the UE is the paged object or has
a service, so that subsequent data transmission is triggered more
accurately and reliably.
[0065] With reference to the thirteenth possible implementation of
the first aspect, in a fourteenth possible implementation of the
first aspect, the method further includes:
[0066] receiving, by the user equipment, downlink data receiving
occasion configuration information sent by the base station, where
the downlink data receiving occasion configuration information
indicates that the downlink data is received in m subframes
subsequent to when the second indication information is obtained,
and m is an integer greater than or equal to 0; and
[0067] after the determining, by the user equipment, that the user
equipment is a paged object or that there is a service of the user
equipment, the method further includes:
[0068] receiving, by the user equipment, the downlink data
according to the downlink data receiving occasion configuration
information.
[0069] The foregoing solution has the following technical effect:
On a basis that a plurality of pieces of second indication
information are sent, for reception of the downlink data, the UE
may directly receive the downlink data reliably according to the
downlink data receiving occasion configuration information
allocated by the base station.
[0070] With reference to any one of the first aspect, or the first
to the fourteenth possible implementations of the first aspect, in
a fifteenth possible implementation of the first aspect, after the
decoding, by the user equipment, a physical downlink control
channel PDCCH based on the identification information of the user
equipment, to obtain second indication information, the method
further includes:
[0071] sending, by the user equipment, obtainment feedback
information to the base station by using an obtained uplink
feedback resource, where the obtainment feedback information is
used to indicate that the user equipment has successfully obtained
the second indication information.
[0072] With reference to the fifteenth possible implementation of
the first aspect, in a sixteenth possible implementation of the
first aspect, the uplink feedback resource includes a scheduling
request SR resource, or an uplink subframe determined by the base
station based on the PO corresponding to the user equipment.
[0073] The foregoing solution has the following technical effect:
Based on the feedback mechanism that the UE sends a timely feedback
to the base station after obtaining the second indication
information, a resource allocated by the base station to the UE is
more reliable, and wasting is avoided.
[0074] With reference to any one of the first aspect, or the first
to the sixteenth possible implementations of the first aspect, in a
seventeenth possible implementation of the first aspect, after the
determining, by the user equipment, that the user equipment is a
paged object or that there is a service of the user equipment, the
method further includes:
[0075] sending, by the user equipment, an RRC connection request
message to the base station, where the RRC connection request
message includes an RRC connection resumption request message, an
RRC connection establishment request message, or an RRC connection
re-establishment request message.
[0076] With reference to the seventeenth possible implementation of
the first aspect, in an eighteenth possible implementation of the
first aspect, before the sending, by the user equipment, an RRC
connection request message to the base station, the method further
includes:
[0077] receiving, by the user equipment, resource configuration
information sent by the base station, where the resource
configuration information includes a CB-PUSCH resource that is
determined based on the PO corresponding to the user equipment and
one or more PCs next to the PO; and
[0078] the sending, by the user equipment, an RRC connection
request message to the base station includes:
[0079] sending, by the user equipment, the RRC connection request
based on the CB-PUSCH resource.
[0080] With reference to the seventeenth possible implementation of
the first aspect, in a nineteenth possible implementation of the
first aspect, before the sending, by the user equipment, an RRC
connection request message to the base station, the method further
includes.
[0081] sending, by the user equipment, a resource request to the
base station by using an SR resource; and
[0082] receiving, by the user equipment, resource configuration
information sent by the base station; and
[0083] the sending, by the user equipment, an RRC connection
request message to the base station includes:
[0084] sending, by the user equipment, the RRC connection request
message to the base station according to the resource configuration
information, where
[0085] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0086] The foregoing solution has the following technical effects:
When the UE has uplink data that may need to be transmitted or
downlink data that may need to be received, the RRC connection
request message is sent to resume data transmission. To obtain a
resource used to send the RRC connection request message, the UE
may proactively request the base station to allocate the resource,
so as to send the RRC connection request message by using the
resource allocated by the base station; or may send the RRC
connection request message through contention and based on the
CB-PUSCH resource pro-allocated by the base station. Whichever
manner is used, wasting of the resource allocated by the UE is
avoided.
[0087] A second aspect of the present disclosure provides a data
transmission processing method, where the method is executed by a
base station, and the method includes:
[0088] sending, by the base station, first indication information
to user equipment, where the first indication information is used
to instruct the user equipment to save context information of the
user equipment according to the first indication information, and
the context information includes identification information of the
user equipment; and
[0089] sending, by the base station, second indication information
by using a PDCCH, where the second indication information is used
to instruct the user equipment to determine, when obtaining the
second indication information by decoding the PDCCH based on the
identification information of the user equipment, that the user
equipment is a paged object or that there is a service of the user
equipment.
[0090] With reference to the second aspect, in a first possible
implementation of the second aspect, the second indication
information includes a downlink control information DCI format in
the PDCCH, or the second indication information is earned in a DCI
format; and
[0091] the identification information of the user equipment is used
to identify the user equipment within a range of the base station
covering the user equipment or within a range of one or more cells
of the base station.
[0092] With reference to the second aspect or the first possible
implementation of the second aspect, in a second possible
implementation of the second aspect, the method further
includes:
[0093] sending, by the base station, obtaining manner indication
information to the user equipment, where the obtaining manner
indication information is used to indicate an obtaining manner in
which the user equipment obtains the second indication information;
and
[0094] the obtaining manner includes at least two of the following
manners;
[0095] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0096] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0097] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0098] With reference to the first or the second possible
implementation of the second aspect, in a third possible
implementation of the second aspect the DCI format further includes
system information change indication information and/or emergency
service indication information.
[0099] With reference to any one of the second aspect, or the first
to the third possible implementations of the second aspect, in a
fourth possible implementation of the second aspect, the sending,
by the base station, first indication information to user equipment
includes:
[0100] receiving, by the base station, a context information saving
request sent by the user equipment, where the context information
saving request is sent by the user equipment when the user
equipment determines that there is no data that may need to be
transmitted/received within a preset time; and
[0101] determining, by the base station based on the context
information saving request, that the user equipment has not
transmitted/received data within the preset time, saving the
context information, and sending the first indication in format km
to the user equipment; or
[0102] saving, by the base station, the context information when
determining that the user equipment has no data that may need to be
transmitted/received within the preset time, and sending the first
indication information to the user equipment.
[0103] With reference to any one of the second aspect, or the first
to the fourth possible implementations of the second aspect, in a
fifth possible implementation of the second aspect, the first
indication information is used to instruct the user equipment to
save a security key used for data transmission between the user
equipment and the base station and a data packet count for at least
one radio bearer, after it is determined that the user equipment is
the paged object or that there is a service of the user equipment,
a radio bearer that may need to be restored is determined; and data
transmission meant for the radio bearer that may need to be
restored is performed by using the security key and a data packet
count for the radio bearer that may need to be restored, where the
security key includes an encryption key and/or an integrity
protection key.
[0104] With reference to the fifth possible implementation of the
second aspect, in a sixth possible implementation of the second
aspect, the method further includes:
[0105] receiving, by the base station, uplink data sent by the user
equipment, where the uplink data is sent by the user equipment
after the user equipment encrypts the uplink data by using an
encryption keystream, and the user equipment generates the
encryption keystream when determining that there is uplink data
that may need to be sent, by using the security key and the data
packet count for the radio bearer that may need to be restored.
[0106] With reference to the sixth possible implementation of the
second aspect, in a seventh possible implementation of the second
aspect, the method further includes:
[0107] sending, by the base station, a contention based physical
uplink shared channel CB-PUSCH resource to the user equipment,
where the CB-PUSCH resource is used to instruct the user equipment
to send the uplink data through contention and based on the
CB-PUSCH resource.
[0108] With reference to the fifth possible implementation of the
second aspect, in an eighth possible implementation of the second
aspect, the method further includes:
[0109] sending, by the base station, downlink data to the user
equipment, so that the user equipment decodes, when determining
that there is downlink data that may need to be received, the
received downlink data by using the security key and the data
packet count for the radio bearer that may need to be restored.
[0110] With reference to any one of the fifth to the eighth
possible implementations of the second aspect, in a ninth possible
implementation of the second aspect, the method further
includes:
[0111] sending, by the base station to the user equipment, an
identifier of the radio bearer that may need to be restored, where
the identifier of the radio bearer that may need to be restored is
used to instruct the user equipment to determine, based on the
identifier of the radio bearer that may need to be restored, the
radio bearer that may need to be restored.
[0112] With reference to any one of the second aspect, or the first
to the ninth possible implementations of the second aspect, in a
tenth possible implementation of the second aspect, the sending, by
the base station, second indication information by using a PDCCH
includes:
[0113] sending the second indication information by using the PDCCH
at each of N different paging occasions POs corresponding to the
user equipment; or
[0114] continuously send, by using the PDCCH, N pieces of second
indication information at one PO corresponding to the user
equipment and in N-1 consecutive subframes subsequent to the
PO.
[0115] With reference to the tenth possible implementation of the
second aspect, in an eleventh possible implementation of the second
aspect, before the sending, by the base station, second indication
information by using a PDCCH, the method further includes:
[0116] sending downlink data receiving occasion configuration
information to the user equipment, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0.
[0117] With reference to any one of the second aspect, or the first
to the eleventh possible implementations of the second aspect, in a
twelfth possible implementation of the second aspect, the method
further includes:
[0118] receiving, by the base station, obtainment feedback
information sent by the user equipment by using an uplink feedback
resource, where the obtainment feedback information is used to
indicate that the user equipment has successfully obtained the
second indication information.
[0119] With reference to the twelfth possible implementation of the
second aspect, in a thirteenth possible implementation of the
second aspect, before the receiving, by the base station,
obtainment feedback information sent by foe user equipment by using
an uplink feedback resource, the method further includes:
[0120] sending, by the base station, uplink feedback resource
configuration information to the user equipment, where an uplink
feedback resource indicated by the uplink feedback resource
configuration information includes a scheduling request SR
resource, or an uplink subframe determined based on the PO
corresponding to the user equipment.
[0121] With reference to any one of the second aspect, or the first
to the thirteenth possible implementations of the second aspect, in
a fourteenth possible implementation of the second aspect, the
method further includes:
[0122] receiving, by the base station, an RRC connection request
message sent by the user equipment, where the RRC connection
request message includes an RRC connection resumption request
message, an RRC connection establishment request message, or an RRC
connection re-establishment request message.
[0123] With reference to the fourteenth possible implementation of
the second aspect, in a fifteenth possible implementation of the
second aspect, the method further includes:
[0124] sending, by the base station, resource configuration
information to the user equipment, where the resource configuration
information includes a CB-PUSCH resource that is determined based
on the PO corresponding to the user equipment and one or more POs
next to the PO; and
[0125] the receiving, by the base station, an RRC connection
request message sent by the user equipment includes:
[0126] receiving, by the base station, an RRC connection request
message sent by the user equipment based on the CB-PUSCH
resource.
[0127] With reference to the fifteenth possible implementation of
the second aspect, in a sixteenth possible implementation of the
second aspect, the method further includes:
[0128] receiving, by the base station, a resource request sent by
the user equipment by using an SR resource; and
[0129] sending, by the base station, resource configuration
information to the user equipment; and
[0130] the receiving, by the base station, an RRC connection
request message sent by the user equipment includes:
[0131] receiving, by the base station, the RRC connection request
message sent by the user equipment according to the resource
configuration information, where
[0132] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0133] A third aspect of the present disclosure provides user
equipment, including:
[0134] a receiving module, configured to receive first indication
information sent by a base station;
[0135] a saving module, configured to save context information of
the user equipment according to the first indication information,
where the context information includes identification information
of the user equipment;
[0136] an obtaining module, configured to decode a physical
downlink control channel PDCCH based on the identification
information of the user equipment, to obtain second indication
information; and
[0137] a determining module, configured to: when the obtaining
module obtains the second indication information, determine that
the user equipment is a paged object or that there is a service of
the user equipment.
[0138] With reference to the third aspect, in a first possible
implementation of the third aspect, the obtaining module
includes:
[0139] a first obtaining submodule, configured to: if a downlink
control information DCI format in the PDCCH is correctly decoded
based on the identification information that identifies the user
equipment within a range of the base station or within a range of
one or more cells of the base station, determine that the second
indication information is successfully obtained; or
[0140] the obtaining module includes:
[0141] a second obtaining submodule, configured to decode the PDCCH
based on the identification information that identifies the user
equipment within a range of the base station or within a range of
one or more cells of the base station, to obtain the second
indication information included in the DCI format in the PDCCH.
[0142] With reference to the third aspect or the first possible
implementation of the third aspect, in a second possible
implementation of the third aspect, the receiving module is further
configured to:
[0143] receive obtaining manner indication information sent by the
base station, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information; and
[0144] the obtaining manner includes at least two of the following
manners;
[0145] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0146] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0147] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0148] With reference to the third aspect, in a third possible
implementation of the third aspect, the obtaining module
includes.
[0149] a third obtaining submodule, configured to detect the PDCCH
based on a P-RNTI, to obtain the second indication information,
where the second indication information is paging message
scheduling information; and
[0150] a fourth obtaining submodule, configured to receive, from a
PDSCH and based on the scheduling information, a paging message
corresponding to the user equipment; and
[0151] the determining module is further configured to determine,
based on the paging message, that the user equipment is the paged
object or that there is a service of the user equipment.
[0152] With reference to any one of the first to the third possible
implementations of the third aspect, in a fourth possible
implementation of the third aspect, the obtaining module is
specifically configured to:
[0153] search common search space CSS or user equipment specific
search space USS, and decode the DCI format in the PDCCH by using
the identification information of the user equipment, to obtain the
second indication information.
[0154] With reference to any one of the first to the fourth
possible implementations of the third aspect, in a fifth possible
implementation of the third aspect, the DCI format further includes
system information change indication information and/or emergency
service indication information.
[0155] With reference to any one of the third aspect, or the first
to the fifth possible implementations of the third aspect, in a
sixth possible implementation of the third aspect, the user
equipment further includes:
[0156] a sending module, configured to send a context information
saving request to the base station when it is determined that there
is no data that may need to be transmitted/received within a preset
time.
[0157] With reference to the sixth possible implementation of the
third aspect, in a seventh possible implementation of the third
aspect, the first indication information is sent by the base
station based on the context information saving request.
[0158] With reference to any one of the third aspect, or the first
to the seventh possible implementations of the third aspect, in an
eighth possible implementation of the third aspect, the saving
module is further configured to:
[0159] save, according to the first indication information, a
security key used for data transmission between the user equipment
and the base station and a data packet count for at least one radio
bearer, where the security key includes an encryption key and/or an
integrity protection key;
[0160] the determining module is further configured to determine a
radio bearer that may need to be restored; and
[0161] the user equipment further includes:
[0162] a processing module, configured to perform, by using the
security key and a data packet count for the radio bearer that may
need to be restored, data transmission meant for the radio bearer
that may need to be restored.
[0163] With reference to the eighth possible implementation of the
third aspect, in a ninth possible implementation of the third
aspect, the processing module is configured to:
[0164] when it is determined that there is uplink data that may
need to be sent, generate an encryption keystream by using the
security key and the data packet count for the radio bearer that
may need to be restored, and encrypt the uplink data by using the
encryption keystream; and
[0165] the sending module is further configured to send the
encrypted uplink data to the base station.
[0166] With reference to the ninth possible implementation of the
third aspect, in a tenth possible implementation of the third
aspect, the sending module is further configured to: when it is
determined that there is uplink data that may need to be sent, send
the uplink data through contention and based on a contention based
physical uplink shared channel CB-PUSCH resource pre-allocated by
the base station.
[0167] With reference to the eighth possible implementation of the
third aspect, in an eleventh possible implementation of the third
aspect, the processing module is further configured to:
[0168] when it is determined that there is downlink data that may
need to be received, decode the received downlink data by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0169] With reference to any one of the eighth to the eleventh
possible implementations of the third aspect, in a twelfth possible
implementation of the third aspect, the receiving module is further
configured to receive an identifier, sent by the base station, of
the radio bearer that may need to be restored; and
[0170] the determining module is further configured to determine,
based on the identifier of the radio bearer that may need to be
restored, the radio bearer that may need to be restored,
[0171] With reference to any one of the third aspect, or the first
to the twelfth possible implementations of the third aspect, in a
thirteenth possible implementation of the third aspect, the
obtaining module is further configured to:
[0172] decode the PDCCH based on the identification information of
the user equipment, to obtain any piece of second indication
information among second indication information sent by the base
station at N different paging occasions POs corresponding to the
user equipment, respectively; or
[0173] decode the PDCCH based on the identification information of
the user equipment, to obtain N pieces of second indication
information continuously sent by the base station at one PO
corresponding to the user equipment and in N-1 consecutive
subframes subsequent to the PO.
[0174] With reference to the thirteenth possible implementation of
the third aspect, in a fourteenth possible implementation of the
third aspect, the receiving module is further configured to:
[0175] receive downlink data receiving occasion configuration
information sent by the base station, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0; and
[0176] receive the downlink data according to the downlink data
receiving occasion configuration information.
[0177] With reference to any one of the third aspect, or the first
to the fourteenth possible implementations of the third aspect, in
a fifteenth possible implementation of the third aspect, the
sending module is further configured to:
[0178] send obtainment feedback information to the base station by
using an obtained uplink feedback resource, where the obtainment
feedback information is used to indicate that the user equipment
has successfully obtained the second indication information.
[0179] With reference to the fifteenth possible implementation of
the third aspect, in a sixteenth possible implementation of the
third aspect, the uplink feedback resource includes a scheduling
request SR resource, or an uplink subframe determined by the base
station based on the PO corresponding to the user equipment.
[0180] With reference to any one of the third aspect, or the first
to the sixteenth possible implementations of the third aspect, in a
seventeenth possible implementation of the third aspect, the
sending module is further configured to:
[0181] send an RRC connection request message to the base station,
where the RRC connection request message includes an RRC connection
resumption request message, an RRC connection establishment request
message, or an RRC connection re-establishment request message.
[0182] With reference to the seventeenth possible implementation of
the third aspect, in an eighteenth possible implementation of the
third aspect, the receiving module is further configured to:
[0183] receive resource configuration information sent by the base
station, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO; and
[0184] the sending module is further configured to:
[0185] send the RRC connection request based on the CB-PUSCH
resource.
[0186] With reference to the seventeenth possible implementation of
the third aspect, in a nineteenth possible implementation of the
third aspect, the sending module is further configured to send a
resource request to the base station by using an SR resource;
[0187] the receiving module is further configured to receive
resource configuration information sent by the base station;
and
[0188] the sending module is further configured to:
[0189] send the RRC connection request message to the base station
according to the resource configuration information, where
[0190] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0191] A fourth aspect of the embodiments of the present disclosure
provides a base station, including:
[0192] a sending module, configured to send first indication
information to user equipment, where the first indication
information is used to instruct the user equipment to save context
information of the user equipment according to the first indication
information, and the context information includes identification
information of the user equipment; and
[0193] the sending module is further configured to: send second
indication information by using a PDCCH, where the second
indication information is used to instruct the user equipment to
determine, when obtaining the second indication information by
decoding the PDCCH based on the identification information of the
user equipment, that the user equipment is a paged object or that
there is a service of the user equipment.
[0194] With reference to the fourth aspect, in a first possible
implementation of the fourth aspect, the indication information
includes a downlink control information DCI format in the PDCCH, or
the second indication information is carried in a DCI format;
and
[0195] the identification information of the user equipment is used
to identify the user equipment within a range of the base station
covering the user equipment or within a range of one or more cells
of the base station.
[0196] With reference to the fourth aspect or the first possible
implementation of the fourth aspect, in a second possible
implementation of the fourth aspect, the sending module is further
configured to:
[0197] send obtaining manner indication information to the user
equipment, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information; and
[0198] the obtaining manner includes at least two of the following
manners:
[0199] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0200] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0201] a third obtaining manner; detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0202] With reference to the first or the second possible
implementation of the fourth aspect, in a third possible
implementation of the fourth aspect, the DCI format further
includes system information change indication information and/or
emergency service indication information.
[0203] With reference to any one of the fourth aspect, or the first
to the third possible implementations of the fourth aspect, in a
fourth possible implementation of the fourth aspect, the base
station further includes:
[0204] a receiving module, configured to receive a context
information saving request sent by the user equipment, where the
context information saving request is sent by the user equipment
when the user equipment determines that there is no data that may
need to be transmitted/received within a preset time:
[0205] a determining module, specifically configured to determine,
based on the context information saving request, that the user
equipment has not transmitted/received data within the preset time;
and
[0206] a saving module, configured to save the context
information.
[0207] With reference to any one of the fourth aspect, or the first
to the fourth possible implementations of the fourth aspect, in a
fifth possible implementation of the fourth aspect, the first
indication information is used to instruct the user equipment to
save a security key used for data transmission between the user
equipment and the base station and a data packet count for at least
one radio bearer; after it is determined that the user equipment is
the paged object or that there is a service of the user equipment,
a radio bearer that may need to be restored is determined; and data
transmission meant for the radio bearer that may need to be
restored is performed by using, the security key and a data packer
count for the radio bearer that may need to be restored, where the
security key includes an encryption key and/or an integrity
protection key.
[0208] With reference to the fifth possible implementation of the
fourth aspect, in a sixth possible implementation of the fourth
aspect, the receiving module is anther configured to:
[0209] receive uplink data sent by the user equipment, where the
uplink data is seat by the user equipment after the user equipment
encrypts the uplink data by using an encryption keystream, and the
user equipment generates the encryption keystream when determining
that there is uplink data that may need to be sent, by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0210] With reference to the sixth possible implementation of the
fourth aspect, in a seventh possible implementation of the fourth
aspect, the sending module is further configured to:
[0211] send a contention based physical uplink shared channel
CB-PUSCH resource to the user equipment, where the CB-PUSCH
resource is used to instruct the user equipment to send the uplink
data through contention and based on the CB-PUSCH resource.
[0212] With reference to the fifth possible implementation of the
fourth aspect, in an eighth possible implementation of the fourth
aspect, the sending module is further configured to:
[0213] send downlink data to the user equipment, so that the user
equipment decodes, when determining that there is downlink data
that may need to be received, the received downlink data by using
the security key and the data packet count for the radio bearer
that may need to be restored.
[0214] With reference to any one of the fifth to the eighth
possible implementations of the fourth aspect, in a ninth possible
implementation of the fourth aspect, the sending module is further
configured to:
[0215] send, to the user equipment, an identifier of the radio
bearer that may need to be restored, where the identifier of the
radio bearer that may need to be restored is used to instruct the
user equipment to determine, based on the identifier of the radio
bearer that may need to be restored, the radio bearer that may need
to be restored.
[0216] With reference to any one of the fourth aspect, or the first
to the ninth possible implementations of the fourth aspect, in a
tenth possible implementation of the fourth aspect, the sending
module is further configured to:
[0217] send the second indication information by using the PDCCH at
each of N different paging occasions POs corresponding to the user
equipment; or
[0218] continuously send, by using the PDCCH, N pieces of second
indication information at one PO corresponding to the user
equipment and in N-1 consecutive subframes subsequent to the
PO.
[0219] With reference to the tenth possible implementation of the
fourth aspect, in an eleventh possible implementation of the fourth
aspect, the sending module is further configured to:
[0220] send downlink data receiving occasion configuration
information to the user equipment, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0.
[0221] With reference to any one of the fourth aspect, or the first
to the eleventh possible implementations of the fourth aspect, in a
twelfth possible implementation of the fourth aspect, the receiving
module is further configured to:
[0222] receive obtainment feedback information sent by the user
equipment by using an uplink feedback resource, where the
obtainment feedback information is used to indicate that the user
equipment has successfully obtained the second indication
information.
[0223] With reference to the twelfth possible implementation of the
fourth aspect, in a thirteenth possible implementation of the
fourth aspect, the sending module is further configured to:
[0224] send uplink feedback resource configuration information to
the user equipment, where an uplink feedback resource indicated by
the uplink feedback resource configuration information includes a
scheduling request SR resource, or an uplink subframe determined
based on the PO corresponding to the user equipment.
[0225] With reference to any one of the fourth aspect, or the first
to the thirteenth possible implementations of the fourth aspect, in
a fourteenth possible implementation of the fourth aspect, the
receiving module is further configured to:
[0226] receive an RRC connection request message sent by the user
equipment, where the RRC connection request message includes an RRC
connection resumption request message, an RRC connection
establishment request message, or an RRC connection
re-establishment request message.
[0227] With reference to the fourteenth possible implementation of
the fourth aspect, in a fifteenth possible implementation of the
fourth aspect, the sending module is further configured to:
[0228] send resource configuration information to the user
equipment, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO; and
[0229] the receiving module is further configured to:
[0230] receive an RRC connection request message sent by the user
equipment based on the CB-PUSCH resource.
[0231] With reference to the fifteenth possible implementation of
the fourth aspect, in a sixteenth possible implementation of the
fourth aspect, the receiving module is further configured to
receive a resource request sent by the user equipment by using an
SR resource:
[0232] the sending module is further configured to send resource
configuration information to the user equipment; and
[0233] the receiving module is further configured to receive the
RRC connection request message sent by the user equipment according
to the resource configuration information, where
[0234] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0235] A fifth aspect of the present disclosure provides user
equipment, including:
[0236] a receiver, configured to receive first indication
information sent by a base station; and
[0237] a processor, configured to save context information of the
user equipment according to the first indication information, where
the context information includes identification information of the
user equipment;
[0238] the processor is further configured to decode a physical
downlink control channel PDCCH based on the identification
information of the user equipment, to obtain second indication
information; and
[0239] the processor is further configured to: when the obtaining
module obtains the second indication information, determine that
the user equipment is a paged object or that there is a service of
the user equipment.
[0240] With reference to the fifth aspect, in a first possible
implementation of the fifth aspect, the processor is further
configured to:
[0241] if a downlink control information DCI format in the PDCCH is
correctly decoded based on the identification information that
identifies the user equipment within a range of the base station or
within a range of one or more cells of the base station, determine
that the second indication information is successfully obtained;
or
[0242] the processor is further configured to:
[0243] decode the PDCCH based on the identification information
that identifies the user equipment within a range of the base
station or within a range of one or more cells of the base station,
to obtain the second indication information included in the DCI
format in the PDCCH.
[0244] With reference to the fifth aspect or the first possible
implementation of the fifth aspect, in a second possible
implementation of the fifth aspect, the receiver is further
configured to:
[0245] receive obtaining manner indication information sent by the
base station, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information; and
[0246] the obtaining manner includes at least two of the following
manners:
[0247] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0248] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0249] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0250] With reference to the fifth aspect, in a third possible
implementation of the fifth aspect, the processor is further
configured to:
[0251] detect the PDCCH based on a P-RNTI, to obtain the second
indication information, where the second indication information is
paging message scheduling information;
[0252] receive, from a PDSCH and based on the scheduling
information, a paging message corresponding to the user equipment;
and
[0253] determine, based on the paging message, that the user
equipment is the paged object or that there is a service of the
user equipment.
[0254] With reference to any one of the first to the third possible
implementations of the fifth aspect, in a fourth possible
implementation of the fifth aspect, the processor is further
configured to:
[0255] search common search space CSS or user equipment specific
search space USS, and decode the DCI format in the PDCCH by using
the identification information of the user equipment, to obtain the
second indication information.
[0256] With reference to any one of the first to the fourth
possible implementations of the fifth aspect, in a fifth possible
implementation of the first aspect, the DCI format further includes
system information change indication information and/or emergency
service indication information.
[0257] With reference to any one of the fifth aspect, or the first
to the fifth possible implementations of the fifth aspect, in a
sixth possible implementation of the fifth aspect, the user
equipment further includes:
[0258] a transmitter, configured to send a context information
saving request to the base station when it is determined that there
is no data that may need to be transmitted/received within a preset
time.
[0259] With reference to the sixth possible implementation of the
fifth aspect, in a seventh possible implementation of the fifth
aspect, the first indication information is sent by the base
station based cm the context information saving request.
[0260] With reference to any one of the fifth aspect, or the first
to the seventh possible implementations of the fifth aspect, in an
eighth possible implementation of the fifth aspect, the processor
is further configured to:
[0261] save, according to the first indication information, a
security key used for data transmission between the user equipment
and the base station and a data packet count for at least one radio
bearer, where the security key includes an encryption key and/or an
integrity protection key;
[0262] the processor is further configured to determine a radio
bearer that may need to be restored; and
[0263] the processor is further configured to perform, by using the
security key and a data packet count for the radio bearer that may
need to be restored, data transmission meant for the radio bearer
that may need to be restored.
[0264] With reference to the eighth possible implementation of the
fifth aspect, in a ninth possible implementation of the fifth
aspect, the processor is further configured to:
[0265] when it is determined that there is uplink data that may
need to be sent, generate an encryption keystream by using the
security key and the data packet count for the radio bearer that
may need to be restored, and encrypt the uplink data by using the
encryption keystream; and
[0266] the transmitter is further configured to send the encrypted
uplink data to the base station.
[0267] With reference to the ninth possible implementation of the
fifth aspect, in a tenth possible implementation of the fifth
aspect, the transmitter is further configured to: when it is
determined that there is uplink data that may need to be sent, send
the uplink data through contention and based on a contention based
physical uplink shared channel CB-PUSCH resource pre-allocated by
the base station.
[0268] With reference to the eighth possible implementation of the
fifth aspect, in an eleventh possible implementation of the fifth
aspect, the processor is limber configured to:
[0269] when it is determined that there is downlink data that may
need to be received, decode the received downlink data by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0270] With reference to any one of the eighth to the eleventh
possible implementations of the fifth aspect, in a twelfth possible
implementation of the fifth aspect, the receiver is further
configured to receive an identifier, sent by the base station, of
the radio bearer that may need to be restored; and
[0271] the processor is further configured to determine, based on
the identifier of the radio bearer that may need to be restored,
the radio bearer that may need to be restored.
[0272] With reference to any one of the fifth aspect, or the first
to the twelfth possible implementations of the fifth aspect, in a
thirteenth possible implementation of the fifth aspect, the
processor is further configured to:
[0273] decode the PDCCH based on the identification information of
the user equipment, to obtain any piece of second indication
information among second indication information sent by the base
station at N different paging occasions POs corresponding to the
user equipment, respectively; or
[0274] decode the PDCCH based on the identification information of
the user equipment, to obtain N pieces of second indication
information continuously sent by the base station at one PO
corresponding to the user equipment and in N-1 consecutive
subframes subsequent to the PO.
[0275] With reference to the thirteenth possible implementation of
the fifth aspect, in a fourteenth possible implementation of the
fifth aspect, the receiver is further configured to:
[0276] receive downlink data receiving occasion configuration
information sent by the base station, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0; and
[0277] receive the downlink data according to the downlink data
receiving occasion configuration information.
[0278] With reference to any one of the fifth aspect, or the first
to the fourteenth possible implementations of the fifth aspect, in
a fifteenth possible implementation of the fifth aspect, the
transmitter is further configured to:
[0279] send obtainment feedback information to the base station by
using an obtained uplink feedback resource, where the obtainment
feedback information is used to indicate that the user equipment
has successfully obtained the second indication information.
[0280] With reference to the fifteenth possible implementation of
the fifth aspect, in a sixteenth possible implementation of the
fifth aspect, the uplink feedback resource includes a scheduling
request SR resource, or an uplink subframe determined by the base
station based on the PO corresponding to the user equipment.
[0281] With reference to any one of the fifth aspect, or the first
to the sixteenth possible implementations of the fifth aspect, in a
seventeenth possible implementation of the fifth aspect, the
transmitter is further configured to:
[0282] send an RRC connection request message to the base station,
where the RRC connection request message includes an RRC connection
resumption request message, an RRC connection establishment request
message, or an RRC connection re-establishment request message.
[0283] With reference to the seventeenth possible implementation of
the fifth aspect, in an eighteenth possible implementation of the
fifth aspect, the receiver is further configured to:
[0284] receive resource configuration information sent by the base
station, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO; and
[0285] the transmitter is further configured to:
[0286] send the RRC connection request based on the CB-PUSCH
resource.
[0287] With reference to the seventeenth possible implementation of
the fifth aspect, in a nineteenth possible implementation of the
fifth aspect, the transmitter is further configured to send a
resource request to the base station by using an SR resource;
[0288] the receiver is further configured to receive resource
configuration information sent by the base station; and
[0289] the transmitter is further configured to:
[0290] send the RRC connection request message to the base station
according to the resource configuration information, where
[0291] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0292] A sixth aspect of the present disclosure provides a base
station, including:
[0293] a transmitter, configured to send first indication
information to user equipment, where the first indication
information is used to instruct the user equipment to save context
information of the user equipment according to the first indication
information, and the context information includes identification
information of the user equipment; and
[0294] the transmitter is further configured to: send second
indication information by using a PDCCH, where the second
indication information is used to instruct the user equipment to
determine, when obtaining the second indication information by
decoding the PDCCH based on the identification information of the
user equipment, that the user equipment is a paged object or that
there is a service of the user equipment.
[0295] With reference to the sixth aspect, in a first possible
implementation of the sixth aspect, the indication information
includes a downlink control information DCI format in the PDCCH, or
the second indication information is carried in a DCI format;
and
[0296] the identification information of the user equipment is used
to identify the user equipment within a range of the base station
covering the user equipment or within a range of one or more cells
of the base station.
[0297] With reference to the sixth aspect or the first possible
implementation of the sixth aspect, in a second possible
implementation of the sixth aspect, the transmitter is further
configured to:
[0298] send obtaining manner indication information to the user
equipment, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information; and
[0299] the obtaining manner includes at least two of the following
manners:
[0300] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0301] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0302] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0303] With reference to the first or the second possible
implementation of the sixth aspect, in a third possible
implementation of the sixth aspect, the DCI format further includes
system information change indication information and/or emergency
service indication information.
[0304] With reference to any one of the sixth aspect, or the first
to the third possible implementations of the sixth aspect, in a
fourth possible implementation of the sixth aspect, the base
station further includes:
[0305] a receiver, configured to receive a context information
saving request sent by the user equipment, where the context
information saving request is sent by the user equipment when the
user equipment determines that there is no data that may need to be
transmitted/received within a preset time; and
[0306] a processor, configured to: determine, based on the context
information saving request, that the user equipment has not
transmitted/received data within the preset time; and save the
context information; or
[0307] the processor is further configured to:
[0308] save the context information when it is determined that the
user equipment has no data that may need to be transmitted/received
within the preset time, and send the context saving indication
information to the user equipment.
[0309] With reference to any one of the sixth aspect, or the first
to the fourth possible implementations of the sixth aspect, in a
fifth possible implementation of the sixth aspect, the first
indication information is used to instruct the user equipment to
save a security key used for data transmission between the user
equipment and the base station and a data packet count for at least
one radio bearer; after it is determined that the user equipment is
the paged object or that there is a service of the user equipment,
a radio bearer that may need to be restored is determined; and data
transmission meant for the radio bearer that may need to be
restored is performed by using the security key and a data packet
count for the radio bearer that may need to be restored, where the
security key includes an encryption key and/or an integrity
protection key.
[0310] With reference to the fifth possible implementation or the
sixth aspect, in a sixth possible implementation of the sixth
aspect, the receiver is further configured to:
[0311] receive uplink data sent by the user equipment, where the
uplink data is sent by the user equipment after the user equipment
encrypts the uplink data by using an encryption keystream, and the
user equipment generates the encryption keystream when determining
that there is uplink data that may need to be sent, by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0312] With reference to the sixth possible implementation of the
sixth aspect, in a seventh possible implementation of the sixth
aspect, the transmitter is further configured to:
[0313] send a contention based physical uplink shared channel
CB-PUSCH resource to the user equipment, where the CB-PUSCH
resource is used to instruct the user equipment to send the uplink
data through contention and based on the CB-PUSCH resource.
[0314] With reference to the fifth possible implementation of the
sixth aspect, in an eighth possible implementation of the sixth
aspect, the transmitter is further configured to:
[0315] send downlink data to the user equipment, so that the user
equipment decodes, when determining that there is downlink data
that may need to be received, the received downlink data by using
the security key and the data packet count for the radio bearer
that may need to be restored.
[0316] With reference to any one of the fifth to the eighth
possible implementations of the sixth aspect, in a ninth possible
implementation of the sixth aspect, the transmitter is further
configured to:
[0317] send, to the user equipment, an identifier of the radio
bearer that may need to be restored, where the identifier of the
radio bearer that may need to be restored is used to instruct the
user equipment to determine, based on the identifier of the radio
bearer that may need to be restored, the radio bearer that may need
to be restored.
[0318] With reference to any one of the sixth aspect, or the first
to the ninth possible implementations of the sixth aspect, in a
tenth possible implementation of the sixth aspect, the transmitter
is further configured to:
[0319] send the second indication information by using the PDCCH at
each of N different paging occasions POs corresponding to the user
equipment; or
[0320] continuously send, by using the PDCCH, N pieces of second
indication information at one PO corresponding to the user
equipment and in N-1 consecutive subframes subsequent to the
PO.
[0321] With reference to the tenth possible implementation of the
sixth aspect, in an eleventh possible implementation of the sixth
aspect, the transmitter is further configured to:
[0322] send downlink data receiving occasion configuration
information to the user equipment, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0.
[0323] With reference to any one of the sixth aspect, or the first
to the eleventh possible implementations of the sixth aspect, in a
twelfth possible implementation of the sixth aspect, the receiver
is further configured to:
[0324] receive obtainment feedback information sent by the user
equipment by using an uplink feedback resource, where the
obtainment feedback information is used to indicate that the user
equipment has successfully obtained the second indication
information.
[0325] With reference to the twelfth possible implementation of the
sixth aspect, in a thirteenth possible implementation of the sixth
aspect, the transmitter is further configured to:
[0326] send uplink feedback resource configuration information to
the user equipment, where an uplink feedback resource indicated by
the uplink feedback resource configuration information includes a
scheduling request SR resource, or an uplink subframe determined
based on the PO corresponding to the user equipment.
[0327] With reference to any one of the sixth aspect, or the first
to the thirteenth possible implementations of the sixth aspect, in
a fourteenth possible implementation of the sixth aspect, the
receiver is further configured to:
[0328] receive an RRC connection request message sent by the user
equipment, where the RRC connection request message includes an RRC
connection resumption request message, an RRC connection
establishment request message, or an RRC connection
re-establishment request message.
[0329] With reference to the fourteenth possible implementation of
the sixth aspect, in a fifteenth possible implementation of the
sixth aspect, the transmitter is further configured to:
[0330] send resource configuration information to the user
equipment, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more PCs next to the PO; and
[0331] the receiver is further configured to:
[0332] receive an RRC connection request message sent by the user
equipment based on the CB-PUSCH resource.
[0333] With reference to the fifteenth possible implementation of
the sixth aspect, in a sixteenth possible implementation of the
sixth aspect, the receiver is further configured to receive a
resource request sent by the user equipment by using an SR
resource;
[0334] the transmitter is further configured to send resource
configuration information to the user equipment; and
[0335] the receiver is further configured to receive the RRC
connection request message sent by the user equipment according to
the resource configuration information, where
[0336] the SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0337] According to the data transmission processing method, the
user equipment, and the base station that are provided in the
present disclosure, after receiving the first indication
information sent by the base station, the user equipment saves the
context information of the user equipment according to the first
indication information. The context information includes the
identification information of the user equipment. Further, the user
equipment decodes the PDCCH based on the identification
information, and if the second indication information used to
indicate that the user equipment is the paged object or that there
is a service of the user equipment can be obtained through
decoding, the user equipment is the paged object or has a service
that may need to be transmitted/received. The indication
information meant for the paged object is carried in the PDCCH, so
that the user equipment can determine, depending on whether the
indication information can be successfully obtained, whether the
user equipment is the paged object or has a service, and perform
subsequent processing, for example, connecting to a network, when
determining that the user equipment is the paged object or has a
service. This avoids wasting of UE power consumption.
BRIEF DESCRIPTION OF DRAWINGS
[0338] To describe the technical solutions in the embodiments of
the present disclosure more clearly, the following briefly
describes the accompanying drawings required for describing the
embodiments or the prior art. Apparently, the accompanying drawings
in the following description show some embodiments of the present
disclosure, and persons of ordinary skill in the art may still
derive other drawings from these accompanying drawings without
creative efforts.
[0339] FIG. 1 is a flowchart of Embodiment 1 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0340] FIG. 2 is a flowchart of Embodiment 2 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0341] FIG. 3 is a flowchart of Embodiment 3 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0342] FIG. 4 is a flowchart of Embodiment 4 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0343] FIG. 5 is a flowchart of Embodiment 5 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0344] FIG. 6 is a flowchart of Embodiment 6 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0345] FIG. 7 is a flowchart of Embodiment 7 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0346] FIG. 8 is a flowchart of Embodiment 8 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0347] FIG. 9 is a flowchart of Embodiment 9 of a data transmission
processing method according to an embodiment of the present
disclosure;
[0348] FIG. 10 is a flowchart of Embodiment 10 of a data
transmission processing method according to an embodiment of the
present disclosure;
[0349] FIG. 11 is a schematic structural diagram of Embodiment 1 of
user equipment according to an embodiment of the present
disclosure;
[0350] FIG. 12 is a schematic structural diagram of Embodiment 2 of
user equipment according to an embodiment of the present
disclosure;
[0351] FIG. 13 is a schematic structural diagram of Embodiment 3 of
user equipment according to an embodiment of the present
disclosure;
[0352] FIG. 14 is a schematic structural diagram of Embodiment 1 of
a base station according to an embodiment of the present
disclosure; and
[0353] FIG. 15 is a schematic structural diagram of Embodiment 2 of
a base station according to an embodiment of the present
disclosure.
DESCRIPTION OF EMBODIMENTS
[0354] To make the objectives, technical solutions, and advantages
of the embodiments of the present disclosure clearer, the following
clearly describes the technical solutions in the embodiments of the
present disclosure with reference to the accompanying drawings in
the embodiments of the present disclosure. Apparently, the
described embodiments are some but not all of the embodiments of
the present disclosure. All other embodiments obtained by persons
of ordinary skill in the art based on the embodiments of the
present disclosure without creative efforts shall fall within the
protection scope of the present disclosure.
[0355] FIG. 1 is a flowchart of Embodiment 1 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 1, this solution is executed by user
equipment (UE). The data transmission processing method includes
the following steps.
[0356] Step 101. The UE receives first indication information sent
by an eNB, and saves context information of the UE according to the
first indication information, where the context information
includes identification information of the UE.
[0357] The eNB sends the first indication information to the UE
when determining that the UE has not transmitted/received data
within a preset time.
[0358] Specifically, the eNB may use the following optional manners
to determine whether the UE has transmitted/received data within
the preset time.
[0359] Manner 1: In a process in which the UE performs data
transmission with a network, after current transmission of data is
complete, if there is no data that may need to be
transmitted/received subsequently within a specified time, that is,
when determining that there is no data that may need to be
transmitted/received within the preset time, the UE sends a context
information saving request to the eNB, to cause the eNB to save the
context information of the UE, that is to request the eNB to save
the context information of the UE. In this case, the first
indication information is sent by the eNB based on the context
information saving request. When receiving the context information
saving request, the eNB determines that the UE has no subsequent
data that may need to be transmitted/received within the time, and
may send a context saving indication message to the UE. The context
saving indication message carries the first indication
information.
[0360] It should be noted that saving the context information of
the UE is saving the context information on a UE side and on a
network side, to be specific, the eNB. In addition, during specific
implementation, the context information saving request may also be
referred to as an RRC connection suspension request message, or the
like. The context saving indication message carrying the first
indication information may also be referred to as an RRC connection
suspension indication message, an RRC connection release indication
message, or the like, without any specific limitation.
[0361] Manner 2: The first indication information is sent by the
eNB based on a record of data transmission with the UE when the eNB
determines that no data transmission with the UE is performed
within the preset time. In this manner, when determining, depending
on a status of data transmission with the UE, that the UE has no
subsequent data that may need to be transmitted/received, the eNB
may automatically determine that saving the context information of
the UE (or equivalently referred to as RRC connection suspension or
release) may be performed, so as to send the first indication
information to the UE.
[0362] It should be noted that after determining that the UE has
not transmitted/received data within the specified time, the eNB
does not send the first indication information to the UE
immediately, but need to interact with core network devices, an MME
and an SGW, to complete related processing on the network side, for
example, UE bearer suspension processing, and sends the first
indication information to the UE after the related processing is
complete. Interaction between the eNB and the core network devices
is described in a subsequent embodiment, and details are not
described in this embodiment.
[0363] Further, after receiving the first indication information
sent by the eNB, the UE saves the context information. Generally,
the context information may include one or more of: radio resource
configuration information of the UE, a security algorithm, a UE
identifier or the identification information of the UE, measurement
configuration information, and the like. The radio resource
configuration information may include one or more of: physical
layer configuration information, MAC layer configuration
information, RLC layer configuration information, and PDCP layer
configuration information. The identification information of the UE
includes, for example, a C-RNTI.
[0364] It should be noted that the first indication information is
usually sent based on the following communication scenario: After
the UE communicates with a base station by using the context
information, if no data transmission may need to be performed
subsequently within the specified time, the UE may change into an
RRC idle state from an RRC connected state, and delete the context
information. To ensure that network transmission can be quickly
resumed based on the context information subsequently, the base
station may immediately instruct the UE to save the context
information after determining that the UE has not
transmitted/received data within the specified time. In this case,
a state of the UE is not limited. The UE may be in an RRC idle
state, an RRC connected state, or an RRC suspended state. In this
way, when the PDCCH is received, the user equipment identifier in
the context information may be used to detect second indication
information included in the PDCCH
[0365] Step 102. The UE decodes a PDCCH based on the identification
information of the UE, to obtain second indication information.
[0366] Step 103. The UE determines that the UE is a paged object or
that there is a service of the UE.
[0367] In this embodiment, the identification information of the UE
may be used to uniquely identify the UE within a range of the eNB
serving the UE or within a range of one or more cells of the
eNB.
[0368] During actual application, if the eNB may need to page given
UE, the PDCCH is scrambled by using identification information of
the UE, so as to send the indication information.
[0369] Optionally, the decoding a PDCCH based on the identification
information of the UE, to obtain second indication information may
be implemented in the following manner:
[0370] 1. if a downlink control information (DCI) format in the
PDCCH is correctly decoded based on the identification information
of the UE, determining that the second indication information is
successfully obtained; or
[0371] 2. decoding the PDCCH based on the identification
information of the UE, to obtain the second indication information
included in a DCI format in the PDCCH.
[0372] To be specific, in this embodiment, it may be defined that,
if the UE has correctly decoded a preset downlink control
information DCI format in the PDCCH by using the identification
information of the UE, the UE is a paged object or has a service.
In other words, the second indication information indicating that
the UE is the paged object or has a service is obtained.
Alternatively, a bit definition of second indication information
may be added to a preset DCI format, and if the UE obtains, through
decoding by using the identification information of the UE, the
second indication information that is included in the DCI format in
the PDCCH and that indicates that the UE is the paged abject or has
a service, the UE is the paged object or has a service.
[0373] Specifically, only one bit may be included in the DCI
format. For example, when the bit is 1, it may indicate that the UE
is paged and may need to be connected to a network to
transmit/receive data. When the bit is 0, the UE is not paged
currently.
[0374] In specific implementation, the UE may search common search
space (CSS) or UE specific search space (USS), and decode the
preset DCI format in the PDCCH by using the identification
information of the UE, to obtain the second indication
information.
[0375] In addition, optionally, in addition to the second
indication information used to indicate whether the UE is the paged
object or has a service, the DCI format may further include system
information change indication information and/or emergency service
indication information. Using the system information change
indication information as an example, the DCI format may be
designed as follows:
[0376] the first bit: paging indication information used to
indicate whether UE is paged; and
[0377] the second bit: system information change indication
information used to notify whether system information has
changed.
[0378] Further, the DCI format may further include the following
emergency service indication information, for example, earthquake
and tsunami warning system indication (Earthquake and Tsunami
Warning System Indication, ETWS for short) information, commercial
mobile alert service (CMAS) information, and extended access
barring parameter modification (EABPM) indication information.
[0379] In this embodiment, after receiving the first indication
information sent by the eNB, the UE saves the context information
of the UE according to the first indication information. The
context information includes the identification information of the
UE. Further, the UE decodes the PDCCH based on the identification
information, and if the second indication information used to
indicate that the UE is the paged object or that there is a service
of the UE can be obtained through decoding, the UE is the paged
object or has a service that may need to be transmitted/received.
The indication information meant for the paged object is carried in
the PDCCH, so that the UE can determine, depending on whether the
indication information can be successfully obtained, whether the UE
is the paged object or has a service, and perform subsequent
processing, for example, connecting to a network, when determining
that the UE is the paged object or has a service. This avoids
wasting of UE power consumption.
[0380] FIG. 2 is a flowchart of Embodiment 2 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 2, the method specifically includes
the following steps.
[0381] Step 201. UE receives first indication information sent by
an eNB, and saves context information of the user equipment
according to the first indication information, where the context
information includes identification information of the user
equipment.
[0382] Step 202. The UE saves, according to the first indication
information, a security key for data transmission between the UE
and the eNB and a data packet count for at least one radio
bearer.
[0383] The security key includes an encryption key and or an
integrity protection key.
[0384] In this embodiment, in addition to saving the context
information, the UE also saves the security key and the data packet
count, or referred to as a data packet sequence number.
[0385] The data packet count may be a data packet count compliant
with the Packet Data Convergence Protocol (PDCP), namely, PDCP
COUNT.
[0386] For example, in a current LTE system, a PDCP COUNT format is
as follows: A count value includes an HFN and a PDCP SN:
TABLE-US-00003 HFN PDCP SN
[0387] It can be understood that if a data security processing
process is not performed at a PDCP layer, but at another protocol
layer, a type of the count changes adaptively.
[0388] Specifically, the following two optional manners may be used
to save the data packet count:
[0389] method 1: saving a next data packet count to be used; for
example, when data transmission has proceeded to a fifth data
packet, a count 6 is saved during saving and then is to be used
when data transmission is resumed; and
[0390] method 2: saving a last effective data packet count
currently used; for example, when data transmission has proceeded
to a fifth data packet, a count 5 is saved, and for next use, 1 is
added so that resumed data transmission starts with a count 6.
[0391] Step 203. The UE receives obtaining manner indication
information sent by the eNB.
[0392] The obtaining manner indication information is used to
indicate an obtaining manner in which the UE obtains second
indication information.
[0393] Timing of step 203 is not strictly limited, and is not
limited to the timing relationship in this embodiment.
[0394] The obtaining manner includes at least two of the following
manners:
[0395] a first obtaining manner: correctly decoding, by the UE, a
DCI format in a PDCCH based on the identification information that
identifies the UE within a range of the eNB or within a range of
one or more cells of the eNB, to obtain the second indication
information;
[0396] a second obtaining manner, decoding, by the UE, a PDCCH
based on the identification information that identifies the UE
within a range of the eNB or within a range of one or more cells of
the eNB, to obtain the second indication information included in a
DCI format in the PDCCH; or
[0397] a third obtaining manner: detecting, by the UE, a PDCCH
based on a P-RNTI, to obtain the second indication information.
[0398] In the former two manners, the identification information of
the UE mainly refers to a C-RNTI used to uniquely identify the UE.
In the third manner, the P-RNTI does not uniquely identify the UE,
and is common identification information.
[0399] Step 204. When the obtaining manner indication information
indicates that an obtaining manner is a first obtaining manner or a
second obtaining manner, the UE decodes a PDCCH based on the
identification information of the UE, to obtain second indication
information.
[0400] The processes of obtaining the indication information in the
former two obtaining manners have been described in the foregoing
embodiment, and are not further detailed in this embodiment.
[0401] When the obtaining manner indication information indicates
the third obtaining manner, the UE detects the PDCCH based on the
P-RNTI, to obtain the second indication information. In this case,
the second indication information is paging message scheduling
information. Further, the UE receives, from a PDSCH and based on
the scheduling information, a paging message corresponding to the
UE, and determines, based on the paging message, that the UE is a
paged object or that there is a service of the UE. The scheduling
information refers to a time-frequency resource for receiving the
paging message on the PDSCH.
[0402] Step 205. The UE determines, based on the second indication
information, that the UE is a paged object or that there is a
service of the UE.
[0403] Step 206. The UE receives an identifier, sent by the eNB, of
a radio bearer that may need to be restored, and determines, based
on the identifier of the radio bearer that may need to be restored,
the radio bearer that may need to be restored.
[0404] The identifier of the radio bearer may be included in the
second indication information, or may be included in the paging
message.
[0405] Step 207. The UE performs, by using the security key and a
data packet count for the radio bearer that may need to be
restored, data transmission meant for the radio bearer that may
need to be restored.
[0406] In this case, corresponding to the foregoing two saving
methods, a specific data transmission method may be executed in two
manners:
[0407] manner 1: corresponding to method 1, where the data
transmission starts with a saved 6; and
[0408] manner 2: corresponding to method 2, where 1 is added to a
saved 5 so that the data transmission starts with 6.
[0409] In this embodiment, after initialing paging or service
processing for the UE, the eNB determines, based on service
processing that may need to be performed, the identifier of the
corresponding radio bearer that may need to be restored, and sends,
to the UE, the identifier of the radio bearer that may need to be
restored; in this case, the UE determines, based on the identifier
of the radio bearer that may need to be restored, the radio bearer
that may need to be restored, and further performs, by using the
saved security key and the saved data packet count for the radio
bearer that may need to be restored, data transmission meant for
the radio bearer that may need to be restored.
[0410] Specifically, when the UE has uplink data that may need to
be sent, the performing, by the UE, data transmission meant for the
radio bearer that may need to be restored includes, generating an
encryption keystream by using the security key and the data packet
count for the radio bearer that may need to be restored, encrypting
the uplink data by using the encryption keystream, and sending the
encrypted uplink data to the eNB.
[0411] Specifically, for sending of the encrypted uplink data by
the UE, the uplink data may be sent through contention and based on
a contention based physical uplink shared channel (CB-PUSCH)
resource pre-allocated by the eNB.
[0412] Specifically, when having downlink data that may need to be
received, the UE decodes the received downlink data by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0413] It should be noted that after the UE obtains the second
indication information indicating that the UE is the paged object
or has a service, the UE has downlink data that may need to be
received, and triggers the downlink data receiving processing. If
having uplink data that may need to be sent in this process, the UE
triggers the uplink data sending processing.
[0414] In this embodiment, the second indication information meant
for the paged object is carried in the PDCCH, so that the UE can
determine, depending on whether the second indication information
can be successfully obtained, whether the UE is the paged object or
has a service, and perform data transmission processing when
determining that the UE is the paged object or has a service. This
avoids wasting of UE power consumption.
[0415] FIG. 3 is a flowchart of Embodiment 3 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 3, based on the foregoing embodiments,
that the UE decodes a PDCCH based on the identification information
of the UE, to obtain second indication information may be
implemented by using step 301:
[0416] Step 301. The UE decodes the PDCCH based on the
identification information of the UE, to obtain N pieces of second
indication information continuously sent by the eNB at one PO
corresponding to the UE and in N-1 consecutive subframes subsequent
to the PO.
[0417] Optionally, that the UE decodes a PDCCH based on the
identification information of the UE, to obtain second indication
information may alternatively be implemented in the following
manner:
[0418] decoding, by the UE, the PDCCH based on the identification
information of the UE, to obtain any piece of second indication
information among second indication information sent by the base
station at N different paging occasions POs corresponding to the
user equipment, respectively.
[0419] Further, after the second indication information is
obtained, the following steps of receiving downlink data may be
further included:
[0420] Step 302. The UE receives downlink data receiving occasion
configuration information sent by the eNB, where the downlink data
receiving occasion configuration information indicates that
downlink data is received in m subframes subsequent to when the
second indication information is obtained.
[0421] Step 303. The UE receives the downlink data according to the
downlink data receiving occasion configuration information.
[0422] Herein, m is an integer greater than or equal to 0.
[0423] In this embodiment, the solution of sending a plurality of
pieces of second indication information used to indicate whether
the UE is a paged object or has a service is provided, to ensure
paging reliability, to be specific, to ensure that the UE can
determine more accurately whether the UE is the paged object or has
a service, so that subsequent data transmission is triggered more
accurately and reliably.
[0424] Specifically, after sending the N pieces of second
indication information, the eNB may directly send the downlink data
to the UE. The N pieces of second indication information may be
sent continuously or discontinuously.
[0425] Specifically, in the continuous sending manner, the eNB
calculates one PO corresponding to the UE and sends the N pieces of
second indication information continuously at the PO and in the N-1
consecutive subframes subsequent to the PO. Specifically, the PDCCH
is scrambled by using the identification information of the UE, to
send a preset DCI format carrying the second indication information
for N times or send a preset DCI format for N times, and the
downlink data may be sent to the UE directly after the preset DCI
format is sent for N times. Correspondingly, the UE decodes the
PDCCH based on the identification information of the UE, and
attempts to receive the downlink data after obtaining the N pieces
of second indication into continuously sent by the eNB at the PO
corresponding to the UE and in the N-1 consecutive subframes
subsequent to the PO.
[0426] It should be noted that in this manner an occasion for the
eNB to send the downlink data by the eNB may follow the m subframes
subsequent to when the N pieces of second indication information
are sent continuously. Correspondingly, the UE receives the
downlink data after the m subframes subsequent to when the N pieces
of second indication information are obtained.
[0427] In the discontinuous sending manner, the eNB calculates N
different POs corresponding to the UE, and sends the second
indication information at each PO by using the PDCCH.
Correspondingly, the UE attempts to receive the downlink data after
decoding the PDCCH based on the identification information of the
UE and obtaining any piece of second indication information among
second indication information sent by the eNB at the N different
POs corresponding to the UE, respectively. In this manner, because
the UE is unaware which second indication information sent by the
eNB is the indication information obtained by the UE, the UE
attempts to receive the downlink data immediately after obtaining
the second indication information.
[0428] In an embodiment shown in FIG. 3, after the UE determines
that the UE is the paged object or has a service, if there is
downlink data that may need to be received, to be specific, if the
second indication information is received indicating that the UE
has downlink data that may need to be received, the UE can directly
receive the downlink data in the manner in this embodiment. If the
UE has uplink data that may need to be sent, the UE usually may
need to request a resource from the eNB, so as to send the uplink
data based on the resource allocated by the eNB. This relates to a
data transmission resumption processing process, and details are
described in later embodiments. For a downlink data receiving
process and an uplink data sending process, refer to specific
descriptions in the embodiment of FIG. 2.
[0429] It should be noted that the data transmission resumption
process may be triggered by not only uplink data sending, but also
downlink data receiving. However, in the embodiment in FIG. 3,
based on the foregoing two optional second indication information
sending manners, the eNB may send the downlink data immediately
after the N pieces of second indication information are sent.
[0430] FIG. 4 is a flowchart of Embodiment 4 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 4, based on the foregoing embodiments,
with the embodiment shown in FIG. 1 used as an example, after the
UE decodes a PDCCH based on the identification information of the
UE, to obtain second indication information, the method may further
include the following steps:
[0431] Step 401. The UE sends obtainment feedback information to
the eNB by using an obtained uplink feedback resource, where the
obtainment feedback information is used to indicate that the UE has
successfully obtained the second indication information.
[0432] Step 402. The UE receives resource configuration information
sent by the eNB.
[0433] Step 403. The UE sends an RRC connection request message to
the eNB according to the resource configuration information.
[0434] In this embodiment, to resume data transmission, the UE
usually resumes data transmission by using a process such as RRC
connection establishment. RRC connection re-establishment, or RRC
connection resumption. In this process, the UE may need to send the
RRC connection request message to the eNB. Correspondingly, the RRC
connection request message includes an RRC connection resumption
request message, an RRC connection establishment request message,
or an RRC connection re-establishment request message.
[0435] A corresponding resource may need to be used to send the RRC
connection request message. Therefore, the eNB may need to allocate
the resource to the UE, for the UE to send the RRC connection
request message.
[0436] To avoid wasting of the resource allocated by the eNB, in
this embodiment, the following feedback mechanism is provided:
[0437] Specifically, after the UE decodes the PDCCH by using the
identification information of the UE, to obtain the second
indication information indicating that the UE is the paged object
or has a service, the UE sends the obtainment feedback information
to the eNB by using the pre-obtained uplink feedback resource. The
obtainment feedback information is used to indicate that the UE has
successfully obtained the second indication information. After
receiving the feedback information, the eNB allocates the resource
to the UE, and sends the resource configuration information to the
UE, so that the UE sends the RRC connection request message to the
eNB according to the resource configuration information.
[0438] The uplink feedback resource includes an SR resource, or an
uplink subframe determined by the eNB based on a PO corresponding
to the UE.
[0439] For example, the eNB configures a resource in the x.sup.th
uplink subframe subsequent to a given PO corresponding to the UE.
This resource may be used to transfer a physical layer signal like
a prior-art ACK/NACK feedback, or may feed back a higher layer
message, to indicate whether the second indication information is
successfully received.
[0440] In this embodiment, the uplink feedback resource is a UE
specific resource. Because the eNB is able to learn which UEs are
paged or may be paged at a given PO and the eNB has stored context
information of these UEs, the eNB may allocate UE specific
resources for the UEs paged at the PO. The UE specific resource is
to ensure that the eNB can unambiguously recognize UE that sends a
feedback, so as to unambiguously determine UE that detects
indication information by listening.
[0441] According to a prior-art protocol, at a PO for given UE, the
eNB does not necessarily send paging to the UE. A specific resource
may be allocated only to UE to which the eNB actually sends paging.
To reduce a quantity of feedbacks by the UE, the UE may send a
feedback only after the UE successfully receives the paging for the
UE, which is the second indication information, and if the paging
is not received, send no feedback even if a network has sent the
indication information for the UE and allocated a specific resource
for the feedback of the UE.
[0442] The UE sends, depending on whether the second indication
information is successfully obtained, a feedback on the configured
uplink feedback resource. If the second indication information for
the UE is successfully obtained a success is fed back, or if the
second indication information of the UE is not successfully
obtained, a failure is fed back, or no feedback is provided.
[0443] The manner of allocating, by the eNB, a requested resource
to the UE after receiving the obtainment feedback information is
particularly applicable to a case in which the eNB has downlink
data to send to the UE. For a case in which the UE has uplink data
to send to the eNB, the following optional manner may be further
included:
[0444] sending, by the UE, a resource request to the eNB by using
an SR resource, where the SR resource includes obtainment feedback
information that the second indication information is successfully
obtained and/or indication information that there is uplink data
that may need to be transmitted;
[0445] receiving, by the UE, resource configuration information
sent by the eNB; and
[0446] sending, by the UE, an RRC connection request message to the
eNB according to the resource configuration information.
[0447] Different from using the SR resource to feed back, to the
eNB, dial the indication information is obtained, in this case, a
periodic SR resource is configured for the UE. This SR resource is
used to request a resource from the eNB, and the obtainment
feedback information and indication information that there is
uplink data that may need to be transmitted that are included in
the SR resource may be understood as a notification to the eNB why
the resource is requested.
[0448] In this embodiment, the UE decodes the PDCCH to obtain the
second indication information, and sends the obtainment feedback
information to the eNB when determining, based on the second
indication information, that the UE is the paged object or has a
service, to notify the eNB that the UE has successfully obtained
the second indication information. This causes the eNB to allocate,
to the UE, a resource used to send the RRC connection request
message, so that data transmission resumption is more targeted,
thereby avoiding wasting of the allocated resource.
[0449] In the embodiment shown in FIG. 3, a plurality of pieces of
indication information are sent by using the PDCCH. This improves
paging reliability and thereby avoids wasting of the resource
allocated for use to send the RRC connection request message. In
the embodiment shown in FIG. 4, an occasion for allocating the
resource is controlled, so as to avoid wasting of the allocated
resource. In the following, with reference to FIG. 5, another
solution for avoiding wasting of a resource is provided in the
sense of a specific allocation manner in which the resource is
allocated.
[0450] FIG. 5 is a flowchart of Embodiment 5 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 5, based on the embodiment shown in
FIG. 1, after step 103, the method may further include.
[0451] Step 501. The UE receives resource configuration information
sent by the eNB, where the resource configuration information
includes a CB-PUSCH resource that is determined based on a PO
corresponding to the UE and one or more POs next to the PO.
[0452] Step 502. The UE sends an RRC connection request based on
the CB-PUSCH resource.
[0453] In this embodiment, the RRC connection request message is
based on the CB-PUSCH manner. A CB-PUSCH resource configuration and
a sending resource for sending the second indication information
used to indicate whether the UE is a paged object or has a service,
are defined, for example, a relationship between paging occasions
POs.
[0454] For example, the eNB defines X available CB-PUSCH resources
between two consecutive POs, so as to ensure that the UE sends,
through contention, the RRC connection request message for a
maximum of X times before the eNB sends another piece of second
indication information.
[0455] In this embodiment, a CB-PUSCH resource is allocated between
the determined PO corresponding to the UE and at least one adjacent
PO, so that the UE sends, through contention, the RRC connection
request message only on the CB-PUSCH resource. This reduces wasting
of CB-PUSCH resources.
[0456] FIG. 6 is a flowchart of Embodiment 6 of a data transmission
processing method according to an embodiment of the present
disclosure. This embodiment is executed by a base station (eNB). As
shown in FIG. 6, the method includes the following steps.
[0457] Step 601. The eNB sends first indication information to UE,
where the first indication information is used to instruct the UE
to save context information of the UE according to the first
indication information, and the context information includes
identification information of the UE.
[0458] Step 602. The eNB sends second indication information by
using a PDCCH, where the second indication information is used to
instruct the UE to determine, when obtaining the second indication
information by decoding the PDCCH based on the identification
information of the UE, that the UE is a paged object or that there
is a service of the UE.
[0459] Specifically, similar to the embodiment shown in FIG. 1, in
this embodiment, the eNB may use the following manner to determine
whether the UE has transmitted/received data within a preset lime
and send the first indication information when the UE has not
transmitted/received data:
[0460] receiving a context information saving request sent by the
UE, where the context information saving request is sent by the UE
when the UE determines that there is no data that may need to be
transmitted/received within the preset time; and
[0461] determining, based on the context information saving
request, that the UE has not transmitted/received data within the
preset time, saving the context information of the UE, and sending
the first indication information to the UE.
[0462] In addition, the eNB may alternatively send, based on a
record of data transmission with the UE, the first indication
information when determining that no data transmission with the UE
is performed within the preset time.
[0463] Further, when the network has a service and may need to page
the UE, an MME instructs the eNB to initiate paging to the UE. In
this case, the eNB sends, to the UE by using the PDCCH, the second
indication information used to indicate that the UE is the paged
object or has a service.
[0464] Specifically, the sending the second indication information
by the eNB may be: adding the second indication information to a
preset DCI format, and sending the DCI format by using the PDCCH;
or sending the second indication information by sending a preset
DCI format by using the PDCCH. In addition, when the second
indication information is sent by using the PDCCH, the second
indication information is sent after the PDCCH is scrambled by
using the identification information of the UE. The identification
information of the UE may be, for example, a C-RNTI or a P-RNTI.
Particularly, the identification information of the UE in this
embodiment refers to an identifier that uniquely identifies the UE
within a range of the eNB covering the UE or within a range of one
or more cells of the eNB, for example, a C-RNTI.
[0465] After the eNB sends the second indication information by
using the PDCCH, the UE decodes the PDCCH based on the
identification information of the UE, so as to determine, based on
the second indication information, that the UE is the paged object
or has a service.
[0466] Optionally, the following manner may be used to decode the
PDCCH based on the identification information of the UE to obtain
the second indication information:
[0467] 1. if a DCI format in the PDCCH is correctly decoded based
on the identification information of the UE, determining that the
second indication information is successfully obtained; or
[0468] 2. decoding the PDCCH based on the identification
information of the UE, to obtain the second indication information
included in a DCI format in the PDCCH.
[0469] To be specific, in this embodiment, it may be defined that
if the UE has correctly decoded the preset DCI format in the PDCCH
by using the identification information of the UE, the UE is the
paged object or has a service. In other words, the second
indication information indicating that the UE is the paged object
or has a service is obtained. Alternatively, a bit definition of
second indication information may be added to the preset DCI
format, and if the UE obtains, through decoding by using the
identification information of the UE, the second indication
information that is included in the DCI format in the PDCCH and
that indicates that the UE is the paged object or has a service,
the UE is the paged object or has a service.
[0470] In addition, in addition to the second indication
information, the eNB may also include system information change
indication information and/or emergency service indication
information in the DCI format, so as to notify the UE that the
system information has changed or to notify the UE of specific
emergency service information.
[0471] Optionally, in this embodiment, to be compatible with a
prior-art paging manner, in this embodiment, the eNB may further
configure, for the UE, a manner of obtaining the second indication
information. Specifically, the following step may be further
included:
[0472] Step 603. The eNB sends obtaining manner indication
information to the UE, where the obtaining manner indication
information is used to indicate an obtaining manner in which the UE
obtains the second indication information.
[0473] A timing relationship between step 603 and step 601 is not
strictly limited.
[0474] The obtaining manner includes at least two of the following
manners:
[0475] a first obtaining manner: correctly decoding a DCI format in
the PDCCH based on the identification information that identifies
the UE within a range of the eNB or within a range of one or more
cells of the eNB, to obtain the second indication information;
[0476] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the UE within a range of
the eNB or within a range of one or more cells of the eNB, to
obtain the second indication information included in the DCI format
in the PDCCH; or
[0477] a third obtaining manner, detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0478] In the former two obtaining manners, the identification
information of the UE mainly refers to a C-RNTI used to uniquely
identify the UE. In the third obtaining manner, the P-RNTI does not
uniquely identify the UE, and is common identification
information.
[0479] For configuration of the obtaining manner, the eNB may
configure a specific obtaining manner for the UE depending on a
processing capability of the UE. For example, when the processing
capability of the UE is relatively high, the third obtaining manner
is configured. When the processing capability of the UE is low, the
former two obtaining manners are configured.
[0480] When the obtaining manner indication information received
indicates that the obtaining manner is the first obtaining manner
or the second obtaining manner, the UE decodes the PDCCH based on
the identification information of the UE, for example, a C-RNTI, to
obtain the second indication information. When the obtaining manner
indication information indicates the third obtaining manner, the UE
detects the PDCCH based on the P-RNTI, to obtain the second
indication information. In this case, the second indication
information is paging message scheduling information. Further, the
UE receives, from a PDSCH and based on the scheduling information,
a paging message corresponding to the UE, and determines, based on
the paging message, that the UE is the paged object or that there
is a service of the UE.
[0481] In this embodiment, when paging the UE, the eNB sends, by
using the PDCCH, the second indication information indicating
whether the UE is the paged object or has a service. In this way,
after the UE decodes the PDCCH based on the identification
information of the UE to obtain the second indication information,
the UE can accurately determine whether the UE is the paged object
or has a service; and if the UE determines that the UE is the paged
object or has a service, the UE performs subsequent data
transmission processing, or if the UE determines that the UE is not
the paged object or does not have a service, the UE does not
trigger subsequent processing. This avoids wasting of UE power
consumption.
[0482] It should be noted that after the eNB sends the first
indication information to the UE, the UE saves not only the context
information, but also a security key for data transmission between
the UE and the eNB and a data packet count for at least one radio
bearer.
[0483] In this way, after determining, based on the second
indication information, that the UE is the paged object or there is
a service of the UE, the UE further determines a radio bearer that
may need to be restored, and performs, by using the saved security
key and a data packet count for the radio bearer that may need to
be restored, data transmission meant for the radio bearer that may
need to be restored. The security key includes an encryption key
and/or an integrity protection key.
[0484] In other words, after determining that the UE is the paged
object or there is a service of the UE, the UE triggers a data
transmission resumption processing process, to receive downlink
data of the service or send uplink data.
[0485] To ensure that the UE is aware which radio bearer should be
restored, the eNB further may need to perform the following
processing process shown in FIG. 7.
[0486] FIG. 7 is a flowchart of Embodiment 7 of a data transmission
processing method according to an embodiment of the present
disclosure. This embodiment is executed by a base station (eNB) As
shown in FIG. 7, based on the embodiment shown in FIG. 6, after
step 602, the method may further include the following steps.
[0487] Step 701. The eNB sends, to UE, an identifier of a radio
bearer that may need to be restored, where the identifier of the
radio bearer that may need to be restored is used to instruct the
UE to determine, based on the identifier of the radio bearer that
may need to be restored, the radio bearer that may need to be
restored.
[0488] The identifier of the radio bearer may be included in the
second indication information, or may be included in a paging
message.
[0489] For a case of sending downlink data to the UE, the eNB is
aware of an identifier of a radio bearer corresponding to the
downlink data, and sends the identifier of the radio bearer to the
UE to notify the UE which radio bearer may need to be restored.
[0490] Further, for the case of sending downlink data to the UE,
step 702 is performed. For a case of sending uplink data to the eNB
by the UE, step 703 and step 704 are performed.
[0491] Step 702. The eNB sends downlink data to the UE, so that the
UE decodes, when determining that there is downlink data that may
need to be received, the received downlink data by using a security
key and a data packet count for the radio bearer that may need to
be restored.
[0492] Step 703. The eNB sends a CB-PUSCH resource to the UE, where
the CB-PUSCH resource is used to instruct the UE to send uplink
data through contention and based on the CB-PUSCH resource.
[0493] Step 704. The eNB receives the uplink data sent by the
UE.
[0494] The uplink data is sent by the UE after the UE encrypts the
uplink data by using an encryption keystream, and the UE generates
the encryption keystream when determining that there is uplink data
that may need to be sent, by using the security key and the data
packet count for the radio bearer that may need to be restored.
[0495] In this embodiment, optionally, when the UE sends the uplink
data, the UE is aware of a radio bearer corresponding to the uplink
data, and restores the radio bearer. For sending of the uplink
data, the CB-PUSCH resource pre-allocated by the eNB may be used to
send the uplink data through contention based sending.
[0496] In the following, with reference to an embodiment shown in
FIG. 8, a specific manner of sending the indication information by
the eNB and a specific manner of sending downlink data by the eNB
are described.
[0497] FIG. 8 is a flowchart of Embodiment 8 of a data transmission
processing method according to an embodiment of the present
disclosure. This embodiment is executed by a base station (eNB). As
shown in FIG. 8, based on the embodiment shown in FIG. 6, the
sending the second indication information by using the PDCCH may be
performed by using the following steps.
[0498] Step 801. The eNB sends downlink data receiving occasion
configuration information to the UE, where the downlink data
receiving occasion configuration information indicates that
downlink data is received in m subframes subsequent to when the
second indication information is obtained.
[0499] m is an integer greater than or equal to 0.
[0500] Step 802. The eNB sends, by using a PDCCH, N pieces of
second indication information continuously at one PO corresponding
to the UE and in N-1 consecutive subframes subsequent to the
PO.
[0501] Alternatively, the eNB may send, by using the PDCCH, the
second indication information at each of N different paging
occasions POs corresponding to the UE.
[0502] In this embodiment, the solution of sending a plurality of
pieces of the second indication information used to indicate
whether the UE is a paged object or has a service is provided, to
ensure paging reliability, to be specific, to ensure that the UE
can determine more accurately whether the UE is the paged object or
has a service, so that subsequent data transmission is triggered
more accurately and reliably.
[0503] Specifically, after sending the N pieces of second
indication information, the eNB may directly send the downlink data
to the UE. The N pieces of second indication information may be
sent continuously or discontinuously.
[0504] Specifically, in the continuous sending manner, the eNB
calculates one PO corresponding to the UE and sends the N pieces of
second indication information continuously at the PO and in the N-1
consecutive subframes subsequent to the PO. Specifically, the PDCCH
is scrambled by using the identification information of the UE, to
send a preset DCI format carrying the second indication information
for N times or send a preset DCI format for N times, and the
downlink data may be sent to the UE directly after the preset DCI
format is sent for N times. Correspondingly, the UE decodes the
PDCCH based on the identification information of the UE, and
attempts to receive the downlink data after obtaining the N pieces
of second indication information continuously sent by the eNB at
the PO corresponding to the UE and in the N-1 consecutive subframes
subsequent to the PO.
[0505] It should be noted that in this manner, an occasion for the
eNB to send the downlink data may follow the m subframes subsequent
to when the N pieces of second indication information are sent
continuously, and the eNB notifies the UE of the occasion for the
eNB to send the downlink data, which is also the occasion for the
UE to receive the downlink data. Correspondingly, the UE receives
the downlink data after the m subframes subsequent to when the N
pieces of second indication information are obtained.
[0506] In the discontinuous sending manner, the eNB calculates N
different POs corresponding to the UE, and sends the second
indication information at each PO by using the PDCCH.
Correspondingly, the UE attempts to receive the downlink data after
decoding the PDCCH based on the identification information of the
UE and obtaining any piece of second indication information among
second indication information sent by the eNB at the N different
POs corresponding to the UE, respectively. In this manner, because
the UE is unaware which second indication information sent by the
eNB is the second indication information obtained by the UE, the UE
attempts to receive the downlink data immediately after obtaining
the second indication information.
[0507] In this embodiment, a plurality of pieces of second
indication information are sent, ensuring that the UE can receive
paging from the eNB reliably. In this way, subsequent data
transmission is more reliable, and wasting of a resource such as UE
power consumption is avoided.
[0508] In the foregoing embodiments, ensuring that the UE receives
paging from the eNB more reliably, and avoiding wasting of a
resource such as UE power consumption, are considered from a
perspective of sending the second indication information. In the
following, with reference to an embodiment shown in FIG. 9, from a
perspective of data transmission resumption, to be specific, from a
perspective of allocating a resource for sending an RRC connection
request message during data transmission resumption, the resource
is allocated more accurately and reliably, so as to further avoid
wasting of the resource for sending the RRC connection request
message.
[0509] FIG. 9 is a flowchart of Embodiment 9 of a data transmission
processing method according to an embodiment of the present
disclosure. As shown in FIG. 9, based on the embodiment shown in
FIG. 6, after step 602, the following steps may be further
included.
[0510] Step 901. The eNB sends uplink feedback resource
configuration information to the UE, where an uplink feedback
resource indicated by the uplink feedback resource configuration
information includes an SR resource, or an uplink subframe
determined based on a PO corresponding to the UE.
[0511] Step 902. The eNB receives obtainment feedback information
sent by the UE by using the uplink feedback resource, where the
obtainment feedback information is used to indicate that the UE has
successfully obtained the second indication information.
[0512] In this embodiment, when the UE determines that the UE is a
paged object or has a service, the UE may need to perform data
transmission resumption processing, so as to perform data
transmission processing such as uplink data sending and downlink
data receiving.
[0513] Data transmission may be resumed by using a process such as
RRC connection establishment, RRC connection re-establishment, or
RRC connection resumption. In the process of implementing data
transmission resumption by using these processes, an RRC connection
request message may need to be sent to the eNB. Correspondingly,
the RRC connection request message includes an RRC connection
resumption request message, an RRC connection establishment request
message, or an RRC connection re-establishment request message.
[0514] A corresponding resource may need to be used to send the RRC
connection request message. Therefore, the eNB may need to allocate
the resource to the UE, for the UE to send the RRC connection
request message.
[0515] To avoid wasting of the resource allocated by the eNB, in
this embodiment, the following feedback mechanism is provided.
[0516] Specifically, after the UE decodes the PDCCH by using the
identification information of the UE, to obtain the second
indication information indicating that the UE is the paged object
or has a service, the UE sends the obtainment feedback information
to the eNB by using the pre-obtained uplink feedback resource. The
obtainment feedback information is used to indicate that the UE has
successfully obtained the second indication information. After
receiving the feedback information, the UE allocates the resource
to the UE, and sends the resource configuration information to the
UE, so that the UE sends the RRC connection request message to the
eNB according to the resource configuration information.
[0517] The uplink feedback resource includes an SR resource, or an
uplink subframe determined by the eNB based on the PO corresponding
to the UE.
[0518] For example, the eNB configures a resource in the x.sup.th
uplink subframe subsequent to a given PO corresponding to the UE.
This resource may be used to transfer a physical layer signal like
a prior-art ACK/NACK feedback, or may feed back a higher layer
message, to indicate whether the second indication information is
successfully received.
[0519] Step 903. The eNB sends resource configuration information
to the UE, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the UE and one or more PCs next to the PO.
[0520] Step 904. The eNB receives an RRC connection request message
sent by the UE based on the CB-PUSCH resource.
[0521] In this embodiment, optionally, the requested resource
allocated by the eNB to the UE is a resource used to send the RRC
connection request message, and may include the CB-PUSCH resource
that is determined based on the PO corresponding to the UE and the
one or more POs next to the PO. In this case, the UE sends the RRC
connection request message through contention by using the CB-PUSCH
resource.
[0522] In this embodiment, the RRC connection request message is
based on the CB-PUSCH manner: A CB-PUSCH resource configuration and
a sending resource for sending the second indication information
used to indicate whether the UE is a paged object or has a service,
are defined, for example, a relationship between paging occasions
POs.
[0523] For example, the eNB defines X available CB-PUSCH resources
between two consecutive POs, so as to ensure that the UE sends,
through contention, the RRC connection request message for a
maximum of X times before the eNB sends another piece of second
indication information.
[0524] This feedback mechanism is particularly applicable to a case
in which the eNB has downlink data that may need to be sent. For a
case in which the UE has uplink data that may need to be sent, the
UE may proactively request the eNB to allocate a resource when
there is uplink data that may need to be sent, to be used to send
the RRC connection request message.
[0525] Specifically, for the uplink case, the following allocation
processing process may be included:
[0526] receiving, by the eNB, a resource request sent by the UE by
using an SR resource, where the SR resource includes obtainment
feedback information that the second indication information is
successfully obtained and/or indication information that there is
uplink data that may need to be transmitted:
[0527] sending, by the eNB, resource configuration information to
the UE; and
[0528] receiving, by the eNB, an RRC connection request message
sent by the UE according to the resource configuration
information.
[0529] Different from using the SR resource to feed back, to the
eNB, that the indication information is obtained, in this case, a
periodic SR resource is configured for the UE. This SR resource is
used to request a resource from the eNB, and the obtainment
feedback information and indication information that there is
uplink data that may need to be transmitted that are included in
the SR resource may be understood as a notification to the eNB why
the resource is requested.
[0530] In this embodiment, the UE decodes the PDCCH to obtain the
second indication information, and sends the obtainment feedback
information to the eNB when determining, based on the second
indication information, that the UE is the paged object or has a
service, to notify the eNB that the UE has successfully obtained
the second indication information. This causes the eNB to allocate,
to the UE, a resource used to send the RRC connection request
message, so that data transmission resumption is more targeted,
thereby avoiding wasting of the allocated resource.
[0531] FIG. 10 is a flowchart of Embodiment 10 of a data
transmission processing method according to an embodiment of the
present disclosure. As shown in FIG. 10, the following steps may be
included.
[0532] Step 1001. UE performs data transmission with an eNB.
[0533] Step 1002. After a specified time, the UE determines that
there is currently no subsequent data that may need to be
transmitted/received.
[0534] Step 1003. The UE sends a context information saving request
to the eNB.
[0535] Alternatively, the context information saving request may be
referred to as an RRC suspension request used to request to save
context information of the UE
[0536] Step 1002 and step 1003 are optional steps, and therefore,
are marked using dashed lines in this figure.
[0537] Step 1004. The eNB determines to save context information of
the UE, and saves the context information of the UE.
[0538] Alternatively, the context information saving request is
equivalently referred to as RRC connection suspension.
Specifically, the eNB may determine, when receiving the context
information saving request sent by the UE, to save the context
information of the UE. Alternatively, when determining, depending
on a status of data transmission with the UE, that the UE has not
transmitted/received data within a specified time, the eNB may
automatically determine that saving the context information of the
UE (or equivalently referred to as RRC connection suspension) may
be performed.
[0539] Step 1005. The eNB sends a UE context information saving
indication message to an MME.
[0540] Alternatively, the context information saving indication
message is referred to as a context information saving request
message, an RRC connection suspension request message, or an RRC
connection suspension indication message, used to notify the MME
that the UE is to be in a context information saved state or an RRC
connection suspended state.
[0541] Step 1006. The MME sends a UE bearer suspension indication
message to an SGW.
[0542] The indication message is used to indicate to the SGW that a
bearer of the UE is to be in a suspended state or a data
transmission suspended state.
[0543] After receiving the UE context information saving indication
message sent by the eNB, the MME determines that the UE is to be in
a context information saved state or an RRC connection suspended
state. Then, the MME sends the indication message to the SGW, to
indicate to the SGW that the UE is to be in a suspended state or a
data transmission suspended state.
[0544] Step 1007. The SGW sends a bearer suspension acknowledgment
message to the MME.
[0545] Step 1008. The MME sends a connection suspension
acknowledgment message to the eNB.
[0546] Step 1009. The eNB sends a context information saving
indication message to the UE.
[0547] Alternatively, the context information saving indication
message is equivalently referred to as an RRC connection suspension
indication message or an RRC connection release indication message.
The context information saving indication message carries context
information saving indication information, namely the first
indication information, to command the UE to save the context
information of the UE.
[0548] Step 1010. The UE saves context information.
[0549] The context information includes identification information
of the UE.
[0550] Step 1011. The UE decodes a PDCCH based cm the
identification information of the UE, and determines, after
obtaining second indication information, that the UE is a paged
object or has a service.
[0551] Step 1012. The UE interacts with the eNB to connect to a
network.
[0552] Step 1013. The UE sends uplink data and/or receives downlink
data.
[0553] FIG. 11 is a schematic structural diagram of Embodiment 1 of
user equipment according to an embodiment of the present
disclosure. As shown in FIG. 11, the user equipment includes a
receiving module 11, a saving module 12, an obtaining module 13,
and a determining module 14.
[0554] The receiving module 11 is configured to receive first
indication information sent by a base station.
[0555] The saving module 12 is configured to save context
information of the user equipment according to the first indication
information. The context information includes identification
information of the user equipment.
[0556] The obtaining module 13 is configured to decode a physical
downlink control channel PDCCH based on the identification
information of the user equipment, to obtain second indication
information.
[0557] The determining module 14 is configured to: when the
obtaining module obtains the second indication information,
determine that the user equipment is a paged object or that there
is a service of the user equipment.
[0558] Optionally, the user equipment further includes a sending
module 15.
[0559] The sending module 15 is configured to send a context
information saving request to the base station when it is
determined that there is no data that may need to be
transmitted/received within a preset time.
[0560] Correspondingly, the first indication information is sent by
the base station based on the context information saving
request.
[0561] Optionally, the receiving module 11 is further configured to
receive obtaining manner indication information sent by the base
station. The obtaining manner indication information is used to
indicate an obtaining manner in which the user equipment obtains
the second indication information.
[0562] The obtaining manner includes at least two of the following
manners:
[0563] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0564] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0565] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0566] Optionally, the obtaining module 13 includes a first
obtaining submodule 131, or a second obtaining submodule 132, or a
third obtaining submodule 133 and a fourth obtaining submodule
134.
[0567] The first obtaining submodule 131 is configured to: if a
downlink control information DCI format in the PDCCH is correctly
decoded based on the identification information that identifies the
user equipment within a range of the base station or within a range
of one or mote cells of the base station, determine that the second
indication information is successfully obtained.
[0568] The second obtaining submodule 132 is configured to decode
the PDCCH based on the identification information that identifies
the user equipment within a range of the base station or within a
range of one or more cells of the base station, to obtain the
second indication information included in the DCI format in the
PDCCH.
[0569] The third obtaining submodule 133 is configured to detect
the PDCCH based on a P-RNTI, to obtain the second indication
information. The second indication information is paging message
scheduling information.
[0570] The fourth obtaining submodule 134 is configured to receive,
from a PDSCH and based on the scheduling information, a paging
message corresponding to the user equipment.
[0571] The determining module 14 is further configured to
determine, based on the paging message, that the user equipment is
the paged object or that there is a service of the user
equipment.
[0572] Specifically, the obtaining module 13 is specifically
configured to:
[0573] search common search space CSS or user equipment specific
search space USS, and decode the DCI format in the PDCCH by using
the identification information of the user equipment, to obtain the
second indication information.
[0574] Optionally, the DCI format further includes system
information change indication information and/or emergency service
indication information.
[0575] Various optional user equipments in the embodiment shown in
FIG. 11 may be used to execute the technical solution in the
embodiment shown in FIG. 1, with a similar implementation principle
and a similar technical effect, and no details are repeated
herein.
[0576] FIG. 12 is a schematic structural diagram of Embodiment 2 of
user equipment according to an embodiment of the present
disclosure. As shown in FIG. 12, based on the embodiment shown in
FIG. 11, the saving module 12 is further configured to:
[0577] save, according to the first indication information, a
security key used for data transmission between the user equipment
and the base station and a data packet count for at least one radio
bearer, where the security key includes an encryption key and/or an
integrity protection key;
[0578] The determining module 14 is further configured to determine
a radio bearer that may need to be restored.
[0579] The user equipment further includes a processing module
21.
[0580] The processing module 21 is configured to perform, by using
the security key and a data packet count for the radio bearer that
may need to be restored, data transmission meant for the radio
bearer that may need to be restored.
[0581] Optionally, the processing module 21 is configured to:
[0582] when it is determined that there is uplink data that may
need to be sent, generate an encryption keystream by using the
security key and the data packet count for the radio bearer that
may need to be restored, and encrypt the uplink data by using the
encryption keystream.
[0583] The sending module 15 is further configured to send the
encrypted uplink data to the base station.
[0584] Optionally, the sending module 15 is further configured to:
when it is determined that there is uplink data that may need to be
sent, send the uplink data through contention and based on a
contention based physical uplink shared channel CB-PUSCH resource
pre-allocated by the base station.
[0585] Optionally, the processing module 21 is further configured
to:
[0586] when it is determined that there is downlink data that may
need to be received, decode the received downlink data by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0587] Optionally, the receiving module 11 is further configured to
receive an identifier, sent by the base station, of the radio
bearer that may need to be restored.
[0588] Correspondingly, the determining module 14 is further
configured to determine, based on the identifier of the radio
bearer that may need to be restored, the radio bearer that may need
to be restored.
[0589] Optionally, the obtaining module 13 is further configured
to:
[0590] decode the PDCCH based on the identification information of
the user equipment, to obtain any piece of second indication
information among second indication information sent by the base
station at N different paging occasions POs corresponding to the
user equipment, respectively; or
[0591] decode the PDCCH based on the identification information of
the user equipment, to obtain N pieces of second indication
information continuously sent by the base station at one PO
corresponding to the user equipment and in N-1 consecutive
subframes subsequent to the PO.
[0592] Optionally, the receiving module 11 is further configured
to:
[0593] receive downlink data receiving occasion configuration
information sent by the base station, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when five
second indication information is obtained, and m is an integer
greater than or equal to 0; and
[0594] receive the downlink data according to the downlink data
receiving occasion configuration information.
[0595] Optionally, the sending module 11 is further configured
to:
[0596] send obtainment feedback information to the base station by
using an obtained uplink feedback resource, where the obtainment
feedback information is used to indicate that the user equipment
has successfully obtained the second indication information.
[0597] The uplink feedback resource includes a scheduling request
SR resource, or an uplink subframe determined by the base station
based on the PO corresponding to the user equipment.
[0598] Optionally, the sending module 15 is further configured to
send an RRC connection request message to the base station, where
the RRC connection request message includes an RRC connection
resumption request message, an RRC connection establishment request
message, or an RRC connection re-establishment request message.
[0599] Optionally, the receiving module 11 is further configured to
receive resource configuration information sent by the base
station. The resource configuration information includes a CB-PUSCH
resource that is determined based on the PO corresponding to the
user equipment and one or more POs next to the PO.
[0600] The sending module 15 is further configured to send the RRC
connection request based on the CB-PUSCH resource.
[0601] Optionally, the sending module 15 is further configured to
send a resource request to the base station by using an SR
resource.
[0602] The receiving module 11 is further configured to receive
resource configuration information sent by the base station.
[0603] The sending module 15 is further configured to send the RRC
connection request message to the base station according to the
resource configuration information.
[0604] The SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0605] The user equipment provided in this embodiment is configured
to execute the technical solution of the user equipment in the
foregoing embodiments shown in FIG. 2 to FIG. 5, with a similar
implementation principle and a similar technical effect, and no
details are repeated herein.
[0606] FIG. 13 is a schematic structural diagram of Embodiment 3 of
user equipment according to an embodiment of the present
disclosure. As shown in FIG. 13, the user equipment includes a
receiver 31, a processor 32, and a transmitter 33.
[0607] The receiver 31 is configured to receive first indication
information sent by a base station.
[0608] The processor 32 is configured to save context information
of the user equipment according to the first indication
information. The context information includes identification
information of the user equipment.
[0609] The processor 32 is further configured to: decode a physical
downlink control channel PDCCH based on the identification
information of the user equipment, to obtain second indication
information; and determine that live user equipment is a paged
object or that there is a service of the user equipment.
[0610] Optionally, the processor 32 is further configured to: if a
downlink control information DCI format in the PDCCH is correctly
decoded based on the identification information that identifies the
user equipment within a range of the base station or within a range
of one or more cells of the base station, determine that the second
indication information is successfully obtained.
[0611] Optionally, the processor 32 is further configured to decode
the PDCCH based on the identification information that identifies
the user equipment within a range of the base station or within a
range of one or more cells of the base station, to obtain the
second indication information included in the DCI format in the
PDCCH.
[0612] Optionally, the receiver 32 is further configured to receive
obtaining manner indication information sent by the base station.
The obtaining manner indication information is used to indicate an
obtaining manner in which the user equipment obtains the second
indication information.
[0613] The obtaining manner includes at least two of the following
manners:
[0614] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0615] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0616] a third obtaining manner, detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0617] Optionally, the processor 32 is further configured to:
delect the PDCCH based on a P-RNTI, to obtain the second indication
information, where the second indication information is paging
message scheduling information; receive, from a PDSCH and based on
the scheduling information, a paging message corresponding to the
user equipment; and determine, based on the paging message, that
the user equipment is the paged object or that there is a service
of the user equipment.
[0618] Optionally, the processor 32 is further configured to:
search common search space CSS or user equipment specific search
space USS, and decode the DCI format in the PDCCH by using the
identification information of the user equipment, to obtain the
second indication information.
[0619] The DCI format further includes system information change
indication information and/or emergency service indication
information.
[0620] The transmitter 33 is configured to send a context
information saving request to the base station when it is
determined that there is no data that may need to be
transmitted/received within a preset time.
[0621] The first indication information is sent by the base station
based on the context information saving request.
[0622] Optionally, the processor 32 is further configured to save,
according to the first indication information, a security key used
for data transmission between the user equipment and the base
station and a data packet count for at least one radio bearer. The
security key includes an encryption key and/or an integrity
protection key.
[0623] The processor 32 is further configured to determine a radio
bearer that may need to be restored.
[0624] The processor 32 is further configured to perform, by using
the security key and a data packet count for the radio bearer that
may need to be restored, data transmission meant for the radio
bearer that may need to be restored.
[0625] Optionally, the processor 32 is further configured to:
[0626] when it is determined that there is uplink data that may
need to be sent, generate an encryption keystream by using the
security key and the data packet count for the radio bearer that
may need to be restored, and encrypt the uplink data by using the
encryption keystream.
[0627] The transmitter 33 is further configured to send the
encrypted uplink data to the base station.
[0628] Optionally, the transmitter 33 is further configured to:
when it is determined that there is uplink data that may need to be
sent, send the uplink data through contention and based on a
contention based physical uplink shared channel CB-PUSCH resource
pre-allocated by the base station.
[0629] Optionally, the processor 32 is further configured to:
[0630] when it is determined that there is downlink data that may
need to be received, decode the received downlink data by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0631] Optionally, the receiver 31 is further configured to receive
an identifier, sent by the base station, of the radio bearer that
may need to be restored.
[0632] The processor 32 is further configured to determine, based
on the identifier of the radio bearer that may need to be restored,
the radio bearer that may need to be restored.
[0633] Optionally, the processor 32 is further configured to:
[0634] decode the PDCCH based on the identification information of
the user equipment, to obtain any piece of second indication
information among second indication information sent by the base
station at N different paging occasions POs corresponding to the
user equipment, respectively; or
[0635] decode the PDCCH based on the identification information of
the user equipment, to obtain N pieces of second indication
information continuously sent by the base station at one PO
corresponding to the user equipment and in N-1 consecutive
subframes subsequent to the PO.
[0636] Optionally, the receiver 31 is further configured to:
[0637] receive downlink data receiving occasion configuration
information sent by the base station, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0; and
[0638] receive the downlink date according to the downlink data
receiving occasion configuration information.
[0639] Optionally, the transmitter 33 is further configured to:
[0640] send obtainment feedback information to the base station by
using an obtained uplink feedback resource, where the obtainment
feedback information is used to indicate that the user equipment
has successfully obtained the second indication information.
[0641] The uplink feedback resource includes a scheduling request
SR resource, or an uplink subframe determined by the base station
based on the PO corresponding to the user equipment.
[0642] Optionally, the transmitter 33 is further configured to:
[0643] send an RRC connection request message to the base station,
where the RRC connection request message includes an RRC connection
resumption request message, an RRC connection establishment request
message, or an RRC connection re-establishment request message.
[0644] Optionally, the receiver 31 is further configured to:
[0645] receive resource configuration information sent by the base
station, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO.
[0646] The transmitter 33 is further configured to:
[0647] send the RRC connection request based on the CB-PUSCH
resource.
[0648] Optionally, the transmitter 33 is further configured to send
a resource request to the base station by using an SR resource.
[0649] The receiver 31 is further configured to receive resource
configuration information sent by the base station.
[0650] The transmitter 33 is further configured to send the RRC
connection request message to the base station according to the
resource configuration information.
[0651] The SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0652] The user equipment provided in this embodiment is configured
to execute the technical solution of the user equipment in the
foregoing embodiments shown in FIG. 1 to FIG. 5, with a similar
implementation principle and a similar technical effect, and no
details are repeated herein.
[0653] FIG. 14 is a schematic structural diagram of Embodiment 1 of
a base station according to an embodiment of the present
disclosure. As shown in FIG. 14, the base station includes a
determining module 41 and a sending module 42.
[0654] The determining module 41 is configured to determine whether
user equipment has transmitted/received data within a preset
time.
[0655] The sending module 42 is configured to send first indication
information to the user equipment when the user equipment has not
transmitted/received data within the preset time. The first
indication information is used to instruct the user equipment to
save context information of the user equipment according to the
first indication information, and the context information includes
identification information of the user equipment.
[0656] The sending module 42 is further configured to: send second
indication information by using a PDCCH, where the second
indication information is used to instruct the user equipment to
determine, when obtaining the second indication information by
decoding the PDCCH based on the identification information of the
user equipment, that the user equipment is a paged object or that
there is a service of the user equipment.
[0657] Optionally, the indication information includes a downlink
control information DCI format in the PDCCH, or the second
indication information is carried in a DCI format.
[0658] The identification information of the user equipment is used
to identify the user equipment within a range of the base station
covering the user equipment or within a range of one or more cells
of the base station.
[0659] Optionally, the sending module 42 is further configured
to:
[0660] send obtaining manner indication information to the user
equipment, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information.
[0661] The obtaining manner includes at least two of the following
manners:
[0662] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0663] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0664] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0665] The DCI format further includes system information change
indication information and/or emergency service indication
information.
[0666] Further, optionally, the base station further includes a
receiving module 43 and a saving module 44.
[0667] The receiving module 43 is configured to receive a context
information saving request sent by the user equipment. The context
information saving request is sent by the user equipment when the
user equipment determines that there is no data that may need to be
transmitted/received within a preset time.
[0668] The determining module 41 is specifically configured to
determine, based on the context information saving request, that
the user equipment has not transmitted/received data within the
preset time.
[0669] The saving module 44 is configured to save the context
information.
[0670] Alternatively, the determining module 41 triggers the saving
module 44 to save the context information when determining that the
user equipment has no data that may need to be transmitted/received
within the preset time, and triggers the sending module 42 to send
the first indication information to the user equipment.
[0671] Optionally, the first indication information is used to
instruct the user equipment to save a security key used for data
transmission between the user equipment and the base station and a
data packet count for at least one radio bearer; after it is
determined that the user equipment is the paged object or that
there is a service of the user equipment, a radio bearer that may
need to be restored is determined; and data transmission meant for
the radio bearer that may need to be restored is performed by using
the security key and a data packet count for the radio bearer that
may need to be restored. The security key includes an encryption
key and/or an integrity protection key.
[0672] Optionally, the receiving module 43 is further configured
to:
[0673] receive uplink data sent by the user equipment, where the
uplink data is sent by the user equipment after the user equipment
encrypts the uplink data by using an encryption keystream, and the
user equipment generates the encryption keystream when determining
that there is uplink data that may need to be sent, by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0674] Optionally, the sending module 42 is further configured
to:
[0675] send a contention based physical uplink shared channel
CB-PUSCH resource to the user equipment, where the CB-PUSCH
resource is used to instruct the user equipment to send the uplink
data through contention and based on the CB-PUSCH resource.
[0676] Optionally, the sending module 42 is further configured
to:
[0677] send downlink data to the user equipment, so that the user
equipment decodes, when determining that there is downlink data
that may need to be received, the received downlink data by using
the security key and the data packet count for the radio bearer
that may need to be restored.
[0678] Optionally, the sending module 42 is further configured
to:
[0679] send, to the user equipment, an identifier of the radio
bearer that may need to be restored, where the identifier of the
radio bearer that may need to be restored is used to instruct the
user equipment to determine, based on live identifier of the radio
bearer that may need to be restored, the radio bearer that may need
to be restored.
[0680] Optionally, the sending module 42 is further configured
to:
[0681] send the second indication information by using the PDCCH at
each of N different paging occasions POs corresponding to the user
equipment; or
[0682] continuously send, by using the PDCCH, N pieces of second
indication information at one PO corresponding to the user
equipment and in N-1 consecutive subframes subsequent to the
PO.
[0683] Optionally, the sending module 42 is further configured
to:
[0684] send downlink data receiving occasion configuration
information to the user equipment, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0.
[0685] Optionally, the receiving module 43 is further configured
to:
[0686] receive obtainment feedback information sent by the user
equipment by using an uplink feedback resource, where the
obtainment feedback information is used to indicate that the user
equipment has successfully obtained the second indication
information.
[0687] Optionally, the sending module 42 is further configured
to:
[0688] send uplink feedback resource configuration information to
the user equipment, where an uplink feedback resource indicated by
the uplink feedback resource configuration information includes a
scheduling request SR resource, or an uplink subframe determined
based on the PO corresponding to the user equipment.
[0689] Optionally, the receiving module 43 is further configured
to:
[0690] receive an RRC connection request message sent by the user
equipment, where the RRC connection request message includes an RRC
connection resumption request message, an RRC connection
establishment request message, or an RRC connection
re-establishment request message.
[0691] Optionally, the sending module 42 is further configured
to:
[0692] send resource configuration information to the user
equipment, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO.
[0693] The receiving module 43 is further configured to:
[0694] receive an RRC connection request message sent by the user
equipment based on the CB-PUSCH resource.
[0695] Optionally, the receiving module 43 is further configured to
receive a resource request sent by the user equipment by using an
SR resource.
[0696] The sending module 42 is further configured to send resource
configuration information to the user equipment.
[0697] The receiving module 43 is further configured to receive the
RRC connection request message sent by the user equipment according
to the resource configuration information.
[0698] The SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0699] The base station provided in this embodiment is configured
to execute the technical solution of the base station in the
embodiments shown in FIG. 6 to FIG. 10, with a similar
implementation principle and a similar technical effect, and no
details are repeated herein.
[0700] FIG. 15 is a schematic structural diagram of Embodiment 2 of
a base station according to an embodiment of the present
disclosure. As shown in FIG. 15, the base station includes a
transmitter 51, a processor 52, and a receiver 53.
[0701] The transmitter 51 is configured to send first indication
information to user equipment. The first indication information is
used to instruct the user equipment to save context information of
the user equipment according to the first indication information,
and the context information includes identification information of
the user equipment.
[0702] The transmitter 51 is further configured to: send second
indication information by using a PDCCH, where the second
indication information is used to instruct the user equipment to
determine, when obtaining the second indication information by
decoding the PDCCH based on the identification information of the
user equipment, that the user equipment is a paged object or that
there is a service of the user equipment.
[0703] Optionally, the indication information includes a downlink
control information DCI format in the PDCCH, or the second
indication information is carried in a DCI format.
[0704] The identification information of the user equipment is used
to identify the user equipment within a range of the base station
covering the user equipment or within a range of one or more cells
of the base station.
[0705] Optionally, the transmitter 51 is further configured to:
[0706] send obtaining manner indication information to the user
equipment, where the obtaining manner indication information is
used to indicate an obtaining manner in which the user equipment
obtains the second indication information.
[0707] The obtaining manner includes at least two of the following
manners:
[0708] a first obtaining manner: correctly decoding the downlink
control information DCI format in the PDCCH bused on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information;
[0709] a second obtaining manner: decoding the PDCCH based on the
identification information that identifies the user equipment
within the range of the base station or within the range of the one
or more cells of the base station, to obtain the second indication
information included in the DCI format in the PDCCH; and
[0710] a third obtaining manner: detecting the PDCCH based on a
P-RNTI, to obtain the second indication information.
[0711] The DCI format further includes system information change
indication information and/or emergency service indication
information.
[0712] The receiver 53 is configured to receive a context
information saving request sent by the user equipment. The context
information saving request is sent by the user equipment when the
user equipment determines that there is no data that may need to be
transmitted/received within a preset time.
[0713] The processor 52 is further configured to: determine, based
on the context information saving request, that the user equipment
has not transmitted/received data within the preset time; and save
the context information.
[0714] Alternatively, the processor 52 is further configured to
save the context information when determining that the user
equipment has no data that may need to be transmitted/received
within the preset time.
[0715] Optionally, the first indication information is used to
instruct the user equipment to save a security key used for data
transmission between the user equipment and the base station and a
data packet count for at least one radio bearer, after it is
determined that the user equipment is the paged object or that
there is a service of the user equipment, a radio bearer that may
need to be restored is determined; and data transmission meant for
the radio bearer that may need to be restored is performed by using
the security key and a data packet count for the radio bearer that
may need to be restored. The security key includes an encryption
key and/or an integrity protection key.
[0716] Optionally, the receiver 53 is further configured to:
[0717] receive uplink data sent by the user equipment, where the
uplink data is sent by the user equipment after the user equipment
encrypts the uplink data by using an encryption keystream, and the
user equipment generates the encryption keystream when determining
that there is uplink data that may need to be sent, by using the
security key and the data packet count for the radio bearer that
may need to be restored.
[0718] Optionally, the transmitter 51 is further configured to:
[0719] send a contention based physical uplink shared channel
CB-PUSCH resource to the user equipment, where the CB-PUSCH
resource is used to instruct the user equipment to send the uplink
data through contention and based on the CB-PUSCH resource.
[0720] Optionally, the transmitter 51 is further configured to:
[0721] send downlink data to the user equipment, so that the user
equipment decodes, when determining that there is downlink data
that may need to be received, the received downlink data by using
the security key and the data packet count for the radio bearer
that may need to be restored.
[0722] Optionally, the transmitter 51 is further configured to:
[0723] send, to the user equipment, an identifier of the radio
bearer that may need to be restored, where the identifier of the
radio bearer that may need to be restored is used to instruct the
user equipment to determine, based on the identifier of the radio
bearer that may need to be restored, the radio bearer that may need
to be restored.
[0724] Optionally, the transmitter 51 is further configured to:
[0725] send the second indication information by using the PDCCH at
each of N different paging occasions POs corresponding to the user
equipment; or
[0726] continuously send, by using the PDCCH, N pieces of second
indication information at one PO corresponding to the user
equipment and in N-1 consecutive subframes subsequent to the
PO.
[0727] Optionally, the transmitter 51 is further configured to:
[0728] send downlink data receiving occasion configuration
information to the user equipment, where the downlink data
receiving occasion configuration information indicates that the
downlink data is received in m subframes subsequent to when the
second indication information is obtained, and m is an integer
greater than or equal to 0.
[0729] Optionally, the receiver 53 is further configured to:
[0730] receive obtainment feedback information sent by the user
equipment by using an uplink feedback resource, where the
obtainment feedback information is used to indicate that the user
equipment has successfully obtained the second indication
information.
[0731] Optionally, the transmitter 51 is further configured to:
[0732] send uplink feedback resource configuration information to
the user equipment, where an uplink feedback resource indicated by
the uplink feedback resource configuration information includes a
scheduling request SR resource, or an uplink subframe determined
based on the PO corresponding to the user equipment.
[0733] Optionally, the receiver 53 is further configured to:
[0734] receive an RRC connection request message sent by the user
equipment, where the RRC connection request message includes an RRC
connection resumption request message, an RRC connection
establishment request message, or an RRC connection
re-establishment request message.
[0735] Optionally, the transmitter 51 is further configured to:
[0736] send resource configuration information to the user
equipment, where the resource configuration information includes a
CB-PUSCH resource that is determined based on the PO corresponding
to the user equipment and one or more POs next to the PO.
[0737] The receiver 53 is further configured to:
[0738] receive an RRC connection request message sent by the user
equipment based on the CB-PUSCH resource.
[0739] Optionally, the receiver 53 is further configured to receive
a resource request sent by the user equipment by using an SR
resource.
[0740] The transmitter 51 is further configured to send resource
configuration information to live user equipment.
[0741] The receiver 53 is further configured to receive the RRC
connection request message sent by the user equipment according to
the resource configuration information.
[0742] The SR resource includes obtainment feedback information
that the second indication information is successfully obtained
and/or indication information that there is uplink data that may
need to be transmitted.
[0743] The base station provided in this embodiment is configured
to execute the technical solution of the base station in the
embodiments shown in FIG. 6 to FIG. 10, with a similar
implementation principle and a similar technical effect, and no
details are repeated herein.
[0744] It should be understood that in the foregoing user equipment
and base station embodiments, the processor may be a central
processing unit (CPU), or may be another general-purpose processor,
a digital signal processor (DSP), an application-specific
integrated circuit (ASIC), or the like. The general purpose
processor may be a microprocessor, or the processor may be any
normal processor, or the like. The steps of the method disclosed
with reference to the embodiments of the present disclosure may be
directly performed by a hardware processor, or may be performed by
using a combination of hardware in the processor and a software
module.
[0745] Persons of ordinary skill in the art may understand that all
or some of the steps of the method embodiments may be implemented
by a program instructing relevant hardware. The program may be
stored in a computer-readable storage medium. When the program is
executed, the steps of the methods in the embodiments are
performed. The storage medium includes: a read-only memory (ROM), a
RAM, a flash memory, a hard disk, a solid state disk, a magnetic
tape (English: magnetic tape), a floppy disk, an optical disc, and
any combination thereof.
[0746] Finally, it should be noted that the foregoing embodiments
are merely intended for describing the technical solutions of the
present disclosure, but not for limiting the present disclosure.
Although rite present disclosure is described in detail with
reference to the foregoing embodiments, persons of ordinary skill
in the art should understand that they may still make modifications
to the technical solutions described in the foregoing embodiments
or make equivalent replacements to some or all technical features
thereof, without departing from the scope of the technical
solutions of the embodiments of the present dis