U.S. patent application number 17/209931 was filed with the patent office on 2021-07-08 for techniques for determining non-contention random access resource, network device, and terminal device.
The applicant listed for this patent is GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.. Invention is credited to HAI TANG.
Application Number | 20210212128 17/209931 |
Document ID | / |
Family ID | 1000005475952 |
Filed Date | 2021-07-08 |
United States Patent
Application |
20210212128 |
Kind Code |
A1 |
TANG; HAI |
July 8, 2021 |
TECHNIQUES FOR DETERMINING NON-CONTENTION RANDOM ACCESS RESOURCE,
NETWORK DEVICE, AND TERMINAL DEVICE
Abstract
A method for determining a non-contention random access
resource, a network device, and a terminal device are provided. The
method includes: generating, by a network device, indication
information, wherein the indication information is configured to
indicate one of at least two uplink carriers that can be used by a
terminal device to perform non-contention random access, wherein
the at least two uplink carriers at least comprise an uplink
carrier and a supplementary uplink carrier; and sending, by the
network device, the indication information to the terminal device.
In the solutions of the disclosed embodiments, the network device
sends the indication information to the terminal device, so that
the terminal device can determine the non-contention random access
resource when having at least two uplink carriers.
Inventors: |
TANG; HAI; (Dongguan,
CN) |
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Applicant: |
Name |
City |
State |
Country |
Type |
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. |
Dongguan |
|
CN |
|
|
Family ID: |
1000005475952 |
Appl. No.: |
17/209931 |
Filed: |
March 23, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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16846694 |
Apr 13, 2020 |
10986671 |
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17209931 |
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PCT/CN2017/111159 |
Nov 15, 2017 |
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16846694 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 24/10 20130101;
H04W 74/0833 20130101; H04W 72/10 20130101; H04W 72/042
20130101 |
International
Class: |
H04W 74/08 20060101
H04W074/08; H04W 24/10 20060101 H04W024/10; H04W 72/04 20060101
H04W072/04; H04W 72/10 20060101 H04W072/10 |
Claims
1. A method for new radio (NR) comprising: receiving, by a network
device, a channel quality measurement report sent by a terminal
device; determining one uplink carrier from at least two uplink
carriers to be used by the terminal device for non-contention
random access; wherein the channel quality measurement report
comprises: a reference signal received power (RSRP) of a cell, or a
reference signal received quality (RSRQ) of the cell, the cell
comprising a non-supplementary uplink carrier and a supplementary
uplink carrier; generating, by the network device, indication
information, wherein the indication information is configured to
indicate one of the at least two uplink carriers that is used by
the terminal device to perform non-contention random access, and
wherein the at least two uplink carriers at least comprise an
uplink carrier and the supplementary uplink carrier; and sending,
by the network device, the indication information to the terminal
device, wherein the indication information comprises:
identification information of the non-supplementary uplink carrier
and information for indicating a resource of the non-supplementary
uplink carrier, or identification information of the supplementary
uplink carrier and information for indicating a resource of the
supplementary uplink carrier.
2. The method of claim 1 further comprising, prior to generating
the indication information: determining, by the network device, the
priority information corresponding to the resource of the
non-supplementary uplink carrier or the priority information
corresponding to the resource of the supplementary uplink carrier
according to: processing a load of the non-supplementary uplink
carrier, processing a load of the supplementary uplink carrier,
processing a load status of a physical random access channel
(PRACH) resource of the non-supplementary uplink carrier, or
processing a load status of a PRACH resource of the supplementary
uplink carrier.
3. The method of claim 1, wherein a resource of the one of at least
two uplink carriers that is used by the terminal device to perform
non-contention random access comprises: identification information
of a preamble and a physical random access channel (PRACH) resource
for sending the preamble.
4. The method of claim 1, wherein the sending of the indication
information to the terminal device comprises: sending, by the
network device, a radio resource control (RRC) signaling to the
terminal device, the RRC signaling comprising the indication
information.
5. The method of claim 1, wherein the sending of the indication
information to the terminal device comprises: sending, by the
network device, a physical downlink control channel (PDCCH) order
to the terminal device, wherein the PDCCH order comprises the
indication information.
6. A method for new radio (NR) comprising: sending, by a terminal
device, a channel quality measurement report to a network device;
and wherein the channel quality measurement report comprises: a
reference signal received power (RSRP) of a cell or a reference
signal received quality (RSRQ) of the cell, the cell comprising
non-supplementary uplink carrier and a supplementary uplink
carrier; receiving, by the terminal device, indication information
sent by the network device, wherein the indication information is
configured to indicate one of at least two uplink carriers that is
used by the terminal device to perform non-contention random
access, wherein the at least two uplink carriers at least comprise
an uplink carrier and the supplementary uplink carrier; and
performing, by the terminal device, random access according to the
indication information, wherein the indication information
comprises: identification information of a non-supplementary uplink
carrier and information for indicating a resource of the
non-supplementary uplink carrier; or identification information of
the supplementary uplink carrier and information for indicating a
resource of the supplementary uplink carrier.
7. The method of claim 6, wherein a resource of the one of at least
two uplink carriers that is used by the terminal device to perform
non-contention random access comprises: identification information
of a preamble and a physical random access channel (PRACH) resource
for sending the preamble.
8. The method of claim 6, wherein the receiving of the indication
information sent by the network device comprises: receiving, by the
terminal device, a radio resource control (RRC) signaling sent by
the network device, the RRC signaling comprising the indication
information.
9. The method of claim 6, wherein the receiving, by the terminal
device, the indication information sent by the network device
comprises: receiving, by the terminal device, a physical downlink
control channel (PDCCH) order sent by the network device, the PDCCH
order comprising the indication information.
10. A network device for new radio (NR) comprising: a processor
including: a generating unit configured to generate indication
information, the indication information indicating one of at least
two uplink carriers that is used by a terminal device to perform
non-contention random access, wherein the at least two uplink
carriers at least comprise an uplink carrier and a supplementary
uplink carrier; and a transceiver configured to send the indication
information to the terminal device, wherein the transceiver is
further configured to: before the indication information is
generated, receive a channel quality measurement report sent by the
terminal device; and determine one uplink carrier from the at least
two uplink carriers to be used by the terminal device for
non-contention random access; wherein the channel quality
measurement report comprises: a reference signal received power
(RSRP) of a cell or a reference signal received quality (RSRQ) of
the cell, the cell comprising a non-supplementary uplink carrier
and the supplementary uplink carrier, and wherein the indication
information comprises: identification information of the
non-supplementary uplink carrier and information for indicating a
resource of the non-supplementary uplink carrier; or identification
information of the supplementary uplink carrier and information for
indicating a resource of the supplementary uplink carrier.
11. The network device of claim 10, wherein a resource of the one
of at least two uplink carriers that is used by the terminal device
to perform non-contentional random access comprises: identification
information of a preamble and a physical random access channel
(PRACH) resource for sending the preamble.
12. The network device of claim 10, wherein the transceiver is
configured to: send a radio resource control (RRC) signaling to the
terminal device, the RRC signaling comprising the indication
information.
13. The network device of claim 10, wherein the transceiver is
configured to: send a physical downlink control channel (PDCCH)
order to the terminal device, wherein the PDCCH order comprises the
indication information.
14. A terminal device for new radio (NR) comprising: a transceiver
configured to send a channel quality measurement report to a
network device, so that the network device generates indication
information according to the channel quality measurement report;
and wherein the channel quality measurement report comprises: a
reference signal received power (RSRP) of a cell or a reference
signal received quality (RSRQ) of the cell, the cell comprising a
non-supplementary uplink carrier and a supplementary uplink
carrier, wherein the transceiver is further configured to: receive
indication information sent by the network device, the indication
information indicating one of at least two uplink carriers that is
used by the terminal device to perform non-contention random
access, and wherein the at least two uplink carriers at least
comprise an uplink carrier and the supplementary uplink carrier;
and a processor configured to perform random access according to
the indication information, wherein the indication information
comprises: identification information of the non-supplementary
uplink carrier and information for indicating a resource of the
non-supplementary uplink carrier; or identification information of
the supplementary uplink carrier and information for indicating a
resource of the supplementary uplink carrier.
15. The terminal device of claim 14, wherein a resource of the one
of at least two uplink carriers that is used by a terminal device
to perform non-contention random access comprises: identification
information of a preamble and a physical random access channel
(PRACH) resource for sending the preamble.
16. The terminal device of claim 14, wherein the transceiver is
configured to: receive a radio resource control (RRC) signaling
sent by the network device, the RRC signaling comprising the
indication information.
17. The terminal of claim 14, wherein the transceiver is configured
to: receive a physical downlink control channel (PDCCH) order sent
by the network device, wherein the PDCCH order comprises the
indication information.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 16/846,694, filed on Apr. 13, 2020, which is a continuation of
PCT Application No. PCT/CN2017/111159, filed on Nov. 15, 2017, each
of which is hereby incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] Embodiments of the present disclosure relate to the field of
communications, and more specifically, to a method for determining
a non-contention random access resource, by a network device, and
by a terminal device.
BACKGROUND
[0003] As people impose increasing requirements for speed, delay,
high-speed mobility, and energy efficiency, and as services in the
future become diversified and complex, the 3rd Generation
Partnership Project (3GPP) International Standards Organization has
begun to develop 5th-Generation (5G) mobile communications
technology. During early deployment of new radio (NR) technology,
complete NR coverage is difficult to obtain. Therefore, typical
network coverage is a wide-area long term evolution (LTE) coverage
mode and an island NR coverage mode. In addition, a large number of
LTE deployments are below 6 GHz, and few spectrums below 6 GHz can
be used for 5G. Therefore, in the NR, spectrum applications above 6
GHz need to be developed. However, high-band coverage is limited
and signal fades fast.
[0004] In some systems, since an uplink power of a terminal device
is limited, and frequency of an NR spectrum is relatively high
(high frequency indicates a large propagation loss), uplink
coverage is limited. In order to improve uplink coverage, an LTE
spectrum (which has relatively lower frequency) is utilized as an
auxiliary uplink spectrum (that is, there is one auxiliary uplink
carrier), so that uplink coverage can be improved.
[0005] However, when the terminal device has no supplementary
uplink (SUL), when a non-contention random access resource is
allocated to the terminal device in a form of radio resource
control (RRC) or a physical downlink control channel (PDCCH) order,
there is only one uplink carrier. Therefore, the terminal device
clearly knows an allocation status of the non-contention random
access resource, so that the terminal device can correctly select
the non-contention random access resource to initiate a random
access process.
[0006] However, when there is a supplementary uplink (SUL), for
example, the terminal device has at least two uplink (UL) carriers.
In a current allocation manner, the terminal device does not know a
resource of an uplink carrier to be used.
SUMMARY
[0007] The disclosed embodiments include a method for determining a
non-contention random access resource, a network device, and a
terminal device. When having at least two uplink (UL) carriers, the
terminal device can determine the non-contention random access
resource.
[0008] According to a first aspect, a method for determining a
non-contention random access resource is provided, including:
[0009] generating, by a network device, indication information, the
indication information indicating a first resource of a first
uplink carrier and/or a second resource of a second uplink carrier
that are/is used by a terminal device for non-contention random
access, and a frequency of the first uplink carrier being different
from a frequency of the second uplink carrier; and
[0010] sending, by the network device, the indication information
to the terminal device.
[0011] In some embodiments, the network device sends the indication
information to the terminal device, so that the terminal device can
determine the non-contention random access resource when having the
first uplink carrier and the second uplink carrier.
[0012] In some embodiments, the indication information includes
identification information of the first uplink carrier and
information for indicating the first resource.
[0013] In some embodiments, the indication information includes
identification information of the second uplink carrier and
information for indicating the second resource.
[0014] In some embodiments, before the generating, by a network
device, indication information, the method further includes:
[0015] receiving, by the network device, a channel quality
measurement report sent by the terminal device; where the
generating, by a network device, indication information
includes:
[0016] determining, by the network device according to the channel
quality measurement report, an uplink carrier used by the terminal
device for non-contention random access; and
[0017] generating, by the network device, the indication
information according to the uplink carrier used by the terminal
device for non-contention random access.
[0018] In some embodiments, the channel quality measurement report
includes: a reference signal received power RSRP and/or reference
signal received quality RSRQ of a cell corresponding to the first
uplink carrier and an RSRP and/or RSRQ of a cell corresponding to
the second uplink carrier.
[0019] In some embodiments, the indication information includes:
identification information of the first uplink carrier,
identification information of the second uplink carrier,
information for indicating the first resource, and information for
indicating the second resource.
[0020] In some embodiments, the indication information further
includes:
[0021] priority information corresponding to the first resource
and/or priority information corresponding to the second
resource.
[0022] In some embodiments, before the generating, by a network
device, indication information, the method further includes:
[0023] determining, by the network device, the priority information
corresponding to the first resource and/or the priority information
corresponding to the second resource according to at least one of
the following information: processing load of the first uplink
carrier, processing load of the second uplink carrier, a load
status of a physical random access channel PRACH resource of the
first uplink carrier, and/or a load status of a PRACH resource of
the second uplink carrier.
[0024] In some embodiments, the resource used by the terminal
device for non-contention random access includes identification
information of a preamble and a physical random access channel
PRACH resource for sending the preamble.
[0025] In some embodiments, the sending, by the network device, the
indication information to the terminal device includes:
[0026] sending, by the network device, radio resource control RRC
signaling to the terminal device, the RRC signaling including the
indication information.
[0027] In some embodiments, the sending, by the network device, the
indication information to the terminal device includes:
[0028] sending, by the network device, a physical downlink control
channel PDCCH order to the terminal device, the PDCCH order
including the indication information.
[0029] According to a second aspect, a method for determining a
non-contention random access resource is provided, including:
[0030] receiving, by a terminal device, indication information sent
by a network device, the indication information indicating a first
resource of a first uplink carrier and/or a second resource of a
second uplink carrier that are/is used by the terminal device for
non-contention random access, and a frequency of the first uplink
carrier being different from a frequency of the second uplink
carrier; and
[0031] performing, by the terminal device, random access according
to the indication information.
[0032] In some embodiments, the indication information includes
identification information of the first uplink carrier and
information for indicating the first resource.
[0033] In some embodiments, the indication information includes
identification information of the second uplink carrier and
information for indicating the second resource.
[0034] In some embodiments, before the receiving, by a terminal
device, indication information sent by a network device, the method
further includes:
[0035] sending, by a terminal device, a channel quality measurement
report to the network device, so that the network device generates
the indication information according to the channel quality
measurement report.
[0036] In some embodiments, the channel quality measurement report
includes: a reference signal received power RSRP and/or reference
signal received quality RSRQ of a cell corresponding to the first
uplink carrier and an RSRP and/or RSRQ of a cell corresponding to
the second uplink carrier.
[0037] In some embodiments, the indication information includes:
identification information of the first uplink carrier,
identification information of the second uplink carrier,
information for indicating the first resource, and information for
indicating the second resource.
[0038] In some embodiments, the indication information further
includes:
[0039] priority information corresponding to the first resource
and/or priority information corresponding to the second
resource.
[0040] In some embodiments, the resource used by the terminal
device for non-contention random access includes:
[0041] identification information of a preamble and a physical
random access channel PRACH resource for sending the preamble.
[0042] In some embodiments, the receiving, by a terminal device,
indication information sent by a network device includes:
[0043] receiving, by the terminal device, radio resource control
RRC signaling sent by the network device, the RRC signaling
including the indication information.
[0044] In some embodiments, the receiving, by a terminal device,
indication information sent by a network device includes:
[0045] receiving, by the terminal device, a physical downlink
control channel PDCCH order sent by the network device, the PDCCH
order including the indication information.
[0046] According to a third aspect, a network device is provided,
including:
[0047] a generating unit configured to generate indication
information, the indication information indicating a first resource
of a first uplink carrier and/or a second resource of a second
uplink carrier that are/is used by a terminal device for
non-contention random access, and a frequency of the first uplink
carrier being different from a frequency of the second uplink
carrier; and
[0048] a transceiving unit configured to send the indication
information to the terminal device.
[0049] According to a fourth aspect, a network device is provided,
including:
[0050] a processor configured to generate indication information,
the indication information indicating a first resource of a first
uplink carrier and/or a second resource of a second uplink carrier
that are/is used by a terminal device for non-contention random
access, and a frequency of the first uplink carrier being different
from a frequency of the second uplink carrier; and
[0051] a transceiver configured to send the indication information
to the terminal device.
[0052] According to a fifth aspect, a terminal device is provided,
including:
[0053] a transceiving unit configured to receive indication
information sent by a network device, the indication information
indicating a first resource of a first uplink carrier and/or a
second resource of a second uplink carrier that are/is used by the
terminal device for non-contention random access, and a frequency
of the first uplink carrier being different from a frequency of the
second uplink carrier; and
[0054] a processing unit configured to perform random access
according to the indication information.
[0055] According to a sixth aspect, a terminal device is provided,
including:
[0056] a transceiver configured to receive indication information
sent by a network device, the indication information indicating a
first resource of a first uplink carrier and/or a second resource
of a second uplink carrier that are/is used by the terminal device
for non-contention random access, and a frequency of the first
uplink carrier being different from a frequency of the second
uplink carrier; and
[0057] a processor configured to perform random access according to
the indication information.
[0058] According to a seventh aspect, a computer readable medium is
provided for storing a computer program, the computer program
including an instruction for performing the foregoing method
embodiment according to the first aspect or the second aspect.
[0059] According to an eighth aspect, a computer chip is provided,
including:
[0060] an input interface, an output interface, at least one
processor, a memory, where the processor is configured to execute
code in the memory, and when the code is executed, the processor
can implement various processes performed by a network device in
the foregoing method for determining a non-contention random access
resource according to the first aspect or the second aspect.
[0061] According to a ninth aspect, a computer chip is provided,
including:
[0062] an input interface, an output interface, at least one
processor, a memory, where the processor is configured to execute
code in the memory, and when the code is executed, the processor
can implement various processes performed by a terminal device in
the foregoing method for determining a non-contention random access
resource according to the first aspect or the second aspect.
[0063] According to a tenth aspect, a communications system is
provided, including the foregoing network device and terminal
device.
BRIEF DESCRIPTION OF THE DRAWINGS
[0064] FIG. 1 is an example of an application scenario according to
some embodiments.
[0065] FIG. 2 is a schematic flowchart of a method for determining
a non-contention random access resource according to some
embodiments.
[0066] FIG. 3 is a schematic block diagram of a network device
according to some embodiments.
[0067] FIG. 4 is a schematic block diagram of another network
device according to some embodiments.
[0068] FIG. 5 is a schematic block diagram of a terminal device
according to some embodiments.
[0069] FIG. 6 is a schematic block diagram of another terminal
device according to some embodiments.
DETAILED DESCRIPTION
[0070] FIG. 1 is an example of an application scenario according to
some embodiments.
[0071] As shown in FIG. 1, a terminal device may have one downlink
carrier and two uplink carriers (a first uplink carrier and a
second uplink carrier shown in FIG. 1). In particular, the first
uplink carrier and the downlink carrier may be carriers on an NR
high frequency band, and the second uplink carrier may be a carrier
on an LTE low frequency band. It should be understood that the
terminal device shown in FIG. 1 with two uplink carriers is merely
an exemplary description, and no specific limitation is imposed in
this embodiment. For example, the terminal device can also support
three uplink carriers and the like.
[0072] It should be understood that introducing the second uplink
carrier is intended to improve uplink coverage of the NR high
frequency band.
[0073] In particular, since an uplink power of the terminal device
is limited, and frequency of an NR spectrum is relatively high
(high frequency indicates a large propagation loss), uplink
coverage of NR is limited. In order to improve uplink coverage, a
data transmission method is provided in this embodiment. An LTE
spectrum (which has relatively lower frequency) is used as a
supplementary uplink carrier, so that an uplink coverage effect can
be improved.
[0074] For example, a combination of the first uplink carrier and
the second uplink carrier may be similar to carrier aggregation
(CA) in LTE, except that there is no paired downlink. In other
words, from a perspective of band combination, the second uplink
carrier is a cell with an only uplink but no paired downlinks, but
the uplink of the cell is controlled by a specific downlink
carrier, that is, when the second uplink carrier is configured, the
second uplink carrier is a secondary serving cell (SCell) without a
downlink, and control of the second uplink carrier depends on a
primary serving cell (PCell).
[0075] It should be understood that embodiments are applicable to
any communications system including multiple uplinks. For example,
a first communications system and a second communications system
may be various communications systems, such as a global system for
mobile communications (GSM) system, a code division multiple access
(CDMA) system, a wideband code division multiple access (WCDMA)
system, a general packet radio service (GPRS), a long term
evolution (LTE) system, LTE time division duplex (TDD) system, a
universal mobile telecommunications system (UMTS), etc.
[0076] In addition, various embodiments are described in
combination of a network device (first to fourth network devices)
and a terminal device.
[0077] The network device may refer to any type of entity on a
network side for sending or receiving a signal. For example, the
network device may be user equipment (UE) in machine type
communication (MTC), a base transceiver station (BTS) in a GSM or
CDMA, a Node B (NodeB) in WCDMA, an evolutional Node B (eNB or
eNodeB) in LTE, a base station device in a 5G network, etc.
[0078] The terminal device may be any terminal device. In
particular, the terminal device may communicate with one or more
core networks via a radio access network (RAN), and may also be
referred to as an access terminal, a UE, a user unit, a subscriber
station, a mobile station, a mobile console, a remote station, a
remote terminal, a mobile device, a user terminal, a terminal, a
wireless communication device, a user agent, or a user device. For
example, the terminal device may include but is not limited to a
cellular phone, a cordless phone, a Session Initiation Protocol
(SIP) phone, a wireless local loop (WLL) station, a personal
digital assistant (PDA), a handheld device with a wireless
communication function, a computing device, or other processing
devices connected to a wireless modem, an in-vehicle device, a
wearable device, a terminal device in a future 5G network, etc.
[0079] Combined with a non-competitive random access process, it
can be found that, in a scenario of a non-supplementary uplink,
when a non-contention random access resource is allocated to a UE
in a form of RRC or a PDCCH order, there is only one uplink
carrier. Therefore, the UE clearly knows an allocation status of
the non-contention random access resource, so that the UE can
correctly select the non-contention random access resource to
initiate a random access process. However, in the scenario of a
SUL, there are at least two uplink (UL) carriers. Therefore, in a
current allocation manner, the terminal device does not know a
resource of an uplink carrier to be used.
[0080] Therefore, in this embodiment, a method for determining a
non-contention random access resource is provided. Therefore, when
having at least two uplink (UL) carriers, the terminal device can
determine the non-contention random access resource.
[0081] Contention random access in this embodiment is described
below with reference to FIG. 2.
[0082] FIG. 2 is a schematic flowchart of a method for
non-contention random access according to an embodiment of the
present invention. In 210, a network device generates indication
information. In 220, the network device sends the indication
information to a terminal device. In 230, the terminal device
performs random access according to the indication information.
[0083] In particular, the network device generates the indication
information, the indication information indicating a first resource
of a first uplink carrier and/or a second resource of a second
uplink carrier that are/is used by the terminal device for
non-contention random access, and a frequency of the first uplink
carrier being different from a frequency of the second uplink
carrier; and the network device sends the indication information to
the terminal device. Therefore, the terminal device performs random
access according to the received indication information.
[0084] An exemplary description of specific content of the
indication information is given below.
[0085] In an embodiment, the indication information may include a
carrier resource selected by the network device for the terminal
device. In other words, the network device directly indicates, for
the terminal device, the carrier resource selected by the network
device.
[0086] For example, the indication information may include
identification information of the first uplink carrier and
information for indicating the first resource.
[0087] For another example, the indication information may include
identification information of the second uplink carrier and
information for indicating the second resource.
[0088] In this embodiment, the carrier resource is selected by the
network device. Optionally, before the network device generates the
indication information, the network device receives a channel
quality measurement report sent by the terminal device. Then the
network device determines, according to the channel quality
measurement report, an uplink carrier used by the terminal device
for non-contention random access, and generates the indication
information according to the uplink carrier used by the terminal
device for non-contention random access.
[0089] It should be understood that the channel quality measurement
report includes but is not limited to:
[0090] a reference signal received power (RSRP) and/or reference
signal received quality (RSRQ) of a cell corresponding to the first
uplink carrier and an RSRP and/or RSRQ of a cell corresponding to
the second uplink carrier.
[0091] In particular, the network device allocates a set of
non-contention random access resources to the terminal device, and
indicates a UL carrier to which the set of non-contention random
access resources belong. In particular, the network device may
select, according to the measurement result report reported by the
terminal device, the UL carrier to which the resource for the
terminal device to initiate non-contention random access belongs.
For example, in a handover scenario, the network device knows
signal quality. In this case, a current cell in which the terminal
device is currently located needs to send, to a target cell, a
measurement result (e.g., an RSRP/RSRQ) of the target cell obtained
by the terminal device, so that the target cell selects an UL
carrier. In this embodiment of the present invention, when
allocating a dedicated random access resource for the terminal
device, the terminal device may use the measurement result.
[0092] In another embodiment, the indication information may
include a resource of each uplink carrier. In other words, the
network device directly indicates, for the terminal device, all
available resources of uplink carriers, and the terminal device
finally selects a resource for performing non-contention random
access.
[0093] For example, the indication information may include:
identification information of the first uplink carrier,
identification information of the second uplink carrier,
information for indicating the first resource, and information for
indicating the second resource.
[0094] In particular, a corresponding UL carrier number is
configured for each set of non-contention random access resources
allocated by the network device to the terminal device, indicating
an UL carrier to which the non-contention random access resource
belongs, so that the terminal device can learn a correspondence
between the non-competition random access resource and the UL
carrier. For example, the terminal device may select a
non-contention random access resource according to the RSRP
measurement result, and initiates a random access process. For
example, when the RSRP measurement result is greater than a
specific threshold, a UE may select a non-contention random access
resource corresponding to an NR UL. Otherwise, the UE may select
only a non-contention random access resource corresponding to a
SUL.
[0095] The indication information may further include:
[0096] priority information corresponding to the first resource
and/or priority information corresponding to the second
resource.
[0097] Therefore, when the network device allocates two sets of
non-contention random access resources, a priority indication is
configured for each set of non-contention random access resources,
indicating a set of non-contention random access resources
preferentially used by the terminal device when a status of a
measured signal is qualified (e.g., an RSRP is greater than a
specific threshold).
[0098] Optionally, before the network device generates the
indication information, the network device determines the priority
information corresponding to the first resource and/or the priority
information corresponding to the second resource according to at
least one of the following information:
[0099] processing load of the first uplink carrier, processing load
of the second uplink carrier, a load status of a physical random
access channel (PRACH) resource of the first uplink carrier, and a
load status of a PRACH resource of the second uplink carrier.
[0100] In other words, the priority information corresponding to
the first resource and/or the priority information corresponding to
the second resource in the indication information may be set based
on the processing load of the two uplink carriers and the load
statuses of the PRACH resources of the two carriers.
[0101] It should be understood that, in this embodiment of the
present invention, the resource used by the terminal device for
non-contention random access includes, but is not limited to,
identification information of a preamble and a PRACH resource for
sending the preamble.
[0102] Exemplary description of a manner of transmitting the
indication information in this embodiment of the present invention
is given below.
[0103] In an embodiment, the network device sends radio resource
control (RRC) signaling to the terminal device, the RRC signaling
including the indication information. In other words, the
indication information is carried in the RRC signaling to be sent
to the terminal device.
[0104] In another embodiment, the network device sends a physical
downlink control channel (PDCCH) order to the terminal device, the
PDCCH order including the indication information. In other words,
the indication information is carried in the PDCCH order to be sent
to the terminal device.
[0105] FIG. 3 is a schematic block diagram of a network device
according to some embodiments. As shown in FIG. 3, the network
device includes:
[0106] a generating unit 310 configured to generate indication
information, the indication information indicating a first resource
of a first uplink carrier and/or a second resource of a second
uplink carrier that are/is used by a terminal device for
non-contention random access, and a frequency of the first uplink
carrier being different from a frequency of the second uplink
carrier; and
[0107] a transceiving unit 320 configured to send the indication
information to the terminal device.
[0108] Optionally, the indication information includes
identification information of the first uplink carrier and
information for indicating the first resource.
[0109] Optionally, the indication information includes
identification information of the second uplink carrier and
information for indicating the second resource.
[0110] Optionally, the transceiving unit 320 is further configured
to:
[0111] before the indication information is generated, receive a
channel quality measurement report sent by the terminal device.
[0112] The generating unit 310 is configured to:
[0113] determine, according to the channel quality measurement
report, an uplink carrier used by the terminal device for
non-contention random access; and
[0114] generate the indication information according to the uplink
carrier used by the terminal device for non-contention random
access.
[0115] Optionally, the channel quality measurement report includes:
a reference signal received power RSRP and/or reference signal
received quality RSRQ of a cell corresponding to the first uplink
carrier and an RSRP and/or RSRQ of a cell corresponding to the
second uplink carrier.
[0116] Optionally, the indication information includes:
identification information of the first uplink carrier,
identification information of the second uplink carrier,
information for indicating the first resource, and information for
indicating the second resource.
[0117] Optionally, the indication information further includes:
[0118] priority information corresponding to the first resource
and/or priority information corresponding to the second
resource.
[0119] Optionally, the transceiving unit 320 is further configured
to:
[0120] before the indication information is generated, determine
the priority information corresponding to the first resource and/or
the priority information corresponding to the second resource
according to at least one of the following information:
[0121] processing load of the first uplink carrier, processing load
of the second uplink carrier, a load status of a physical random
access channel PRACH resource of the first uplink carrier, and/or a
load status of a PRACH resource of the second uplink carrier.
[0122] Optionally, the resource used by the terminal device for
non-contention random access includes:
[0123] identification information of a preamble and a physical
random access channel PRACH resource for sending the preamble.
[0124] Optionally, the transceiving unit 320 is configured to:
[0125] send radio resource control RRC signaling to the terminal
device, the RRC signaling including the indication information.
[0126] Optionally, the transceiving unit 320 is configured to:
[0127] send a physical downlink control channel PDCCH order to the
terminal device, the PDCCH order including the indication
information.
[0128] It should be noted that the processing unit 310 may be
implemented by a processor, and the transceiving unit 320 may be
implemented by a transceiver. As shown in FIG. 4, a terminal device
400 may include a processor 410, a transceiver 420, and a memory
430. The memory 430 may be configured to store indication
information, and may be further configured to store code,
instructions, etc. executed by the processor 410. Components in the
terminal device 400 are connected using a bus system, where the bus
system includes a power bus, a control bus, and a status signal bus
in addition to a data bus.
[0129] The terminal device 400 shown in FIG. 4 can implement
various processes in the foregoing method embodiment of FIG. 2 that
are implemented by the terminal device. In order to avoid
repetition, details are not described herein again.
[0130] FIG. 5 is a schematic block diagram of a terminal device
according to an embodiment of the present invention. As shown in
FIG. 5, a terminal device 500 includes:
[0131] a transceiving unit 510 configured to receive indication
information sent by a network device, the indication information
indicating a first resource of a first uplink carrier and/or a
second resource of a second uplink carrier that are/is used by the
terminal device for non-contention random access, and a frequency
of the first uplink carrier being different from a frequency of the
second uplink carrier; and
[0132] a processing unit 520 configured to perform random access
according to the indication information.
[0133] Optionally, the indication information includes
identification information of the first uplink carrier and
information for indicating the first resource.
[0134] Optionally, the indication information includes
identification information of the second uplink carrier and
information for indicating the second resource.
[0135] Optionally, the transceiving unit 510 is further configured
to:
[0136] before receiving the indication information sent by the
network device, send a channel quality measurement report to the
network device, so that the network device generates the indication
information according to the channel quality measurement
report.
[0137] Optionally, the channel quality measurement report includes:
a reference signal received power RSRP and/or reference signal
received quality RSRQ of a cell corresponding to the first uplink
carrier and an RSRP and/or RSRQ of a cell corresponding to the
second uplink carrier.
[0138] Optionally, the indication information includes:
identification information of the first uplink carrier,
identification information of the second uplink carrier,
information for indicating the first resource, and information for
indicating the second resource.
[0139] Optionally, the indication information further includes:
[0140] priority information corresponding to the first resource
and/or priority information corresponding to the second
resource.
[0141] Optionally, the resource used by the terminal device for
non-contention random access includes:
[0142] identification information of a preamble and a physical
random access channel PRACH resource for sending the preamble.
[0143] Optionally, the transceiving unit 510 is configured to:
[0144] receive radio resource control RRC signaling sent by the
network device, the RRC signaling including the indication
information.
[0145] Optionally, the transceiving unit 510 is configured to:
[0146] receive a physical downlink control channel PDCCH order sent
by the network device, the PDCCH order including the indication
information.
[0147] It should be noted that the transceiving unit 510 may be
implemented by a transceiver, and the processing unit 520 may be
implemented by a processor. As shown in FIG. 6, a terminal device
600 may include a processor 610, a transceiver 620, and a memory
630. The memory 630 may be configured to store indication
information, and may be further configured to store code,
instructions, etc. executed by the processor 610. Components in the
terminal device 600 are connected using a bus system, where the bus
system includes a power bus, a control bus, and a status signal bus
in addition to a data bus.
[0148] The terminal device 600 shown in FIG. 6 can implement
various processes in the foregoing method embodiment of FIG. 2 that
are implemented by the terminal device. In order to avoid
repetition, details are not described herein again.
[0149] It should be understood that, methods of the disclosed
embodiments may be applied in a processor or be implemented by the
processor.
[0150] In an implementation process, steps in methods of the
disclosed embodiments can be completed by using a hardware
integrated logical circuit in the processor, or by using
instructions in a form of software. More specifically, steps of the
methods disclosed with reference to the disclosed embodiments may
be directly executed and accomplished by using a hardware decoding
processor, or may be executed and accomplished by using a
combination of hardware and software modules in a decoding
processor. The software module may be located in a mature storage
medium in the art, such as a random access memory, a flash memory,
a read-only memory, a programmable read-only memory, an
electrically-erasable programmable memory, or a register. The
storage medium is located in the memory, and the processor reads
information in the memory and completes the steps in the foregoing
methods in combination with hardware of the processor.
[0151] The processor may be an integrated circuit chip, has a
signal processing capability, and can implement or perform various
methods, steps, and logical block diagrams disclosed in
embodiments. For example, the processor may be a general-purpose
processor, a digital signal processor (DSP), an
application-specific integrated circuit (ASIC), a
field-programmable gate array (FPGA), or another programmable logic
device, a transistor logic device, a discrete hardware component,
or the like. In addition, the general purpose processor may be a
microprocessor or the processor may be any conventional processor
or the like.
[0152] In addition, in the disclosed embodiments, the memory may be
a volatile memory or a non-volatile memory, or may include both a
volatile memory and a non-volatile memory. The non-volatile memory
may be a read-only memory (ROM), a programmable read only memory
(PROM), an erasable programmable read only memory (EPROM), an
electrically erasable programmable read-only memory (EEPROM), or a
flash memory. The volatile memory may be a random access memory
(RAM) that serves as an external cache. It should be understood
that the foregoing memory is an exemplary but not limiting
description. For example, the memory in some embodiments may also
be a static random access memory (SRAM), a dynamic random access
memory (DRAM), a synchronous dynamic random access memory (SDRAM),
a double data rate synchronous dynamic random access memory (DDR
SDRAM), an enhanced synchronous dynamic random access memory
(ESDRAM), synchronous link dynamic random access memory (synch link
DRAM, SLDRAM), a direct rambus random access memory (DR RAM), etc.
In other words, the memories of the system and the method described
herein are intended to include, but are not limited to, these and
any other suitable types of memories.
[0153] Finally, it should be noted that, terms used in the
disclosed embodiments and appended claims are merely intended to
describe particular embodiments rather than limit the embodiments
of the present invention.
[0154] For example, the terms "a," "said," and "the" of singular
forms used in the embodiments and the appended claims of the
present invention are also intended to include plural forms, unless
otherwise specified in the context clearly.
[0155] For another example, depending on context, the word "when"
used herein may be explained as "if," "in response to determining"
or "in response to detecting." Similarly, depending on context, the
phase "if determining" or "if detecting (a condition or event for
description)" may be explained as "when determining" or "in
response to determining" or "when detecting (a condition or event
for description)" or "in response to detecting (a condition or
event for description)."
[0156] A person of ordinary skill in the art would be aware that,
in combination with the examples described in the embodiments
disclosed in this specification, units and algorithm steps may be
implemented by electronic hardware, or a combination of computer
software and electronic hardware. Whether the functions are
performed by hardware or software depends on particular
applications and design constraint conditions of the technical
solutions. Persons skilled in the art may use different methods to
implement the described functions for each particular application,
but it should not be considered that the implementation goes beyond
the scope of the embodiments of the present invention.
[0157] It would be clearly understood by a person skilled in the
art that, for the purpose of a convenient and brief description,
for a detailed working process of the foregoing system, apparatus,
and unit, refer to a corresponding process in the foregoing method
embodiments, and details are not described herein again.
[0158] In the embodiments provided in this application, it should
be understood that the disclosed system, apparatus, and method may
be implemented in other manners. For example, the described
apparatus embodiments are merely examples. For example, the unit
division can be merely a logical function division. During actual
implementation, there may be another division manner. For example,
a plurality of units or components may be combined or integrated
into another system, or some features may be ignored or not
performed. In addition, the displayed or discussed mutual couplings
or direct couplings or communication connections may be implemented
through some interfaces. The indirect couplings or communication
connections between the apparatuses or units may be implemented in
electrical, mechanical or other forms.
[0159] The units described as separate parts may or may not be
physically separate, and parts displayed as units may or may not be
physical units, may be located in one position, or may be
distributed on a plurality of network units. Some or all of the
units can be selected according to actual needs to achieve the
objective of disclosed embodiments.
[0160] In addition, functional "units" of the embodiments of the
present invention may be integrated into one processing unit (e.g.,
a processor), or each of the units may exist alone physically, or
two or more units may be integrated into one unit.
[0161] When the functions are implemented in a form of a software
functional unit and sold or used as an independent product, the
functions may be stored in a computer-readable storage medium.
Based on such an understanding, the technical solutions of the
embodiments of the present invention essentially, or the part
contributing to the prior art, or part of the technical solutions
may be implemented in the form of a software product. The computer
software product is stored in a storage medium, and includes
several instructions for instructing a computer device (which may
be a personal computer, a server, a network device, and the like)
to perform all or some of the steps of the method described in the
embodiments of the present invention. The foregoing storage medium
includes any medium that can store program code, such as a USB
flash drive, a removable hard disk, a read-only memory, a random
access memory, a magnetic disk, or an optical disc.
[0162] The foregoing content is merely specific implementations of
the embodiments of the present invention and is not intended to
limit the protection scope of the embodiments of the present
invention. Any variation or replacement can be readily understood
by a person skilled in the art within the technical scope disclosed
in the embodiments of the present invention shall fall within the
protection scope of the embodiments of the present invention.
Therefore, the scope of protection of the embodiments of the
present invention shall be subject to the scope of protection of
the claims.
* * * * *