U.S. patent application number 16/670577 was filed with the patent office on 2020-02-27 for interference indication method and apparatus.
The applicant listed for this patent is Huawei Technologies Co., Ltd.. Invention is credited to Bin Liu, Richard Stirling-Gallacher, Lili Zhang.
Application Number | 20200067684 16/670577 |
Document ID | / |
Family ID | 58487195 |
Filed Date | 2020-02-27 |
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United States Patent
Application |
20200067684 |
Kind Code |
A1 |
Zhang; Lili ; et
al. |
February 27, 2020 |
Interference Indication Method and Apparatus
Abstract
An interference indication method and apparatus detect
interference from a neighboring cell. A base station sends
interference indication information to the neighboring cell
including indication information of a frequency resource that
receives the interference from the neighboring cell and is
configured in a flexible half-duplex mode. In this way, in an
application of a flexible half-duplex technology, a base station
detects a status of interference from a neighboring cell.
Inventors: |
Zhang; Lili; (Beijing,
CN) ; Stirling-Gallacher; Richard; (Munich, DE)
; Liu; Bin; (Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Huawei Technologies Co., Ltd. |
Shenzhen |
|
CN |
|
|
Family ID: |
58487195 |
Appl. No.: |
16/670577 |
Filed: |
October 31, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15764711 |
Mar 29, 2018 |
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PCT/CN2015/091495 |
Oct 8, 2015 |
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16670577 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04L 5/0073 20130101;
H04L 5/16 20130101; H04W 24/10 20130101; H04W 24/02 20130101; H04W
72/0446 20130101; H04W 16/10 20130101; H04W 72/082 20130101 |
International
Class: |
H04L 5/00 20060101
H04L005/00; H04W 72/08 20060101 H04W072/08; H04L 5/16 20060101
H04L005/16; H04W 16/10 20060101 H04W016/10 |
Claims
1. An interference indication method, comprising: detecting, by a
base station, interference from a neighboring cell; and sending, by
the base station, interference indication information to the
neighboring cell, wherein the interference indication information
comprises an indication of a frequency resource that receives the
interference, and wherein the frequency resource is configured to
be in a flexible half-duplex mode.
2. The method according to claim 1, wherein the interference
indication information further comprises one or more of an
indication of a subframe that receives the interference on the
frequency resource, an indication of a physical resource block
(PRB) that receives the interference on the frequency resource, or
an interference level of the interference.
3. The method of claim 2, wherein the interference indication
information further comprises, an indication that a subframe
receives reverse transmission interference from the neighboring
cell on the frequency resource, or an indication that a PRB
receives reverse transmission interference from the neighboring
cell on the frequency resource.
4. The method of claim 1, wherein the interference indication
information is carried in second signaling and overload indication
(OI) signaling for transmission, wherein the second signaling
comprises the indication information of the frequency resource that
receives the interference, and wherein the OI signaling comprises
interference level indication information of the interference to
the frequency resource indicated by the interference indication
information.
5. The method of claim 4, wherein the OI signaling further
comprises indication information of a subframe or a PRB that
receives the interference, or wherein the second signaling further
comprises indication information of a subframe or a PRB that
receives the interference.
6. The method of claim 1, wherein the interference indication
information is carried in second signaling and high interference
indication (HII) signaling for transmission, wherein the second
signaling comprises the indication information of the frequency
resource that receives the interference, and wherein the HII
signaling comprises an indication of a PRB that probably causes the
interference on the frequency resource indicated by the second
signaling.
7. The method of claim 6, wherein the HII signaling further
comprises an indication of a subframe that receives the
interference, and/or interference level indication information, or
wherein the second signaling further comprises an indication of a
subframe or a PRB that receives the interference.
8. The method of claim 1, further comprising: receiving, by the
base station, an indication of a time resource or a frequency
resource configured to be in the flexible half-duplex mode, wherein
the indication is sent by the neighboring cell; or sending, by the
base station, an indication of a time resource or a frequency
resource configured to be in the flexible half-duplex mode.
9. The method of claim 8, further comprising receiving the
indication of the time resource or the frequency resource by
semi-persistent broadcasting.
10. A base station, comprising: a processor, configured to detect
interference from a neighboring cell; and a transceiver, configured
to send interference indication information to the neighboring
cell, wherein the interference indication information comprises an
indication of a frequency resource that receives the interference,
and wherein the frequency resource is configured to be in a
flexible half-duplex mode.
11. The base station of claim 10, wherein the interference
indication information further comprises one or more of an
indication of a subframe that receives the interference on the
frequency resource, an indication of a physical resource block
(PRB) that receives the interference on the frequency resource, or
an interference level of the interference.
12. The base station of claim 11, wherein the interference
indication information further comprises an indication that a
subframe receives reverse transmission interference from the
neighboring cell on the frequency resource, or an indication that a
PRB receives reverse transmission interference from the neighboring
cell on the frequency resource.
13. The base station of claim 10, wherein the interference
indication information is carried in first signaling and second
signaling for transmission, wherein the first signaling comprises
the interference level indication information of the interference,
and wherein the second signaling comprises the indication
information of the frequency resource that receives the
interference.
14. The base station of claim 13, wherein the first signaling
further comprises indication of a subframe or a physical resource
block (PRB) that receives the interference, or wherein the second
signaling further comprises an indication of the subframe or a PRB
that receives the interference.
15. The base station of claim 10, wherein the interference
indication information is carried in second signaling and overload
indication (OI) signaling for transmission, wherein the second
signaling comprises the indication information of the frequency
resource that receives the interference, and wherein the OI
signaling comprises interference level indication information of
the interference to the frequency resource indicated by the
interference indication information.
16. The base station of claim 15, wherein the OI signaling further
comprises an indication of a subframe or a PRB that receives the
interference, or the second signaling further comprises an
indication of a subframe or a PRB that receives the
interference.
17. The base station of claim 10, wherein the interference
indication information is carried in second signaling and high
interference indication (HII) signaling for transmission, wherein
the second signaling comprises the indication information of the
frequency resource that receives the interference, and wherein the
HII signaling comprises an indication of a PRB that probably causes
the interference on the frequency resource indicated by the second
signaling.
18. The base station of claim 17, wherein the HII signaling further
comprises an indication of a subframe that receives the
interference, and/or interference level, or the second signaling
further comprises an indication of a subframe or a PRB that
receives the interference.
19. The base station of claim 10, wherein the transceiver is
further configured to receive indication information of a time
resource and/or a frequency resource configured to be in the
flexible half-duplex mode, wherein the indication information is
sent by the neighboring cell, or send indication information of a
time resource and/or a frequency resource configured to be in the
flexible half-duplex mode.
20. The base station of claim 19, wherein the indication
information of the time resource and/or the frequency resource is
configured to be in the flexible half-duplex mode is sent by
semi-persistent broadcasting.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 15/764,711, filed on Mar. 29, 2018, which is
the national phase of the International Application No.
PCT/CN2015/091495, filed on Oct. 8, 2015, both of which are
incorporated herein by reference in their entireties.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of wireless
communications, and in particular, to an interference indication
method and apparatus.
BACKGROUND
[0003] In a time division duplex (TDD) system, a same spectrum is
allocated to an uplink and a downlink, and the uplink and the
downlink occupy different time periods. Currently, in an Long Term
Evolution (LTE) system, neighboring cells use a same TDD
configuration mode (that is, an uplink-downlink timeslot
configuration) as much as possible, to avoid inter-cell
interference from an uplink (UL) to a downlink (DL) and inter-cell
interference from a DL to a UL.
[0004] To improve frequency utilization, a TDD system may allocate
different uplinks and downlinks in different timeslots, so as to
make full use of wireless resources and adapt to asymmetry of
different services. Such a technology of adaptively implementing an
uplink-downlink timeslot configuration according to a service need
of a network device is usually referred to as a flexible
haft-duplex technology.
[0005] However, when neighboring cells use different timeslot
configurations, cross-timeslot interference is generated, that is,
when a cell uses one timeslot to transmit uplink information and a
neighboring cell uses the same timeslot to transmit downlink
information, there is interference between the two cells, which is
presented as interference from one base station to another or
interference from one piece of user equipment to another. Such
interference reduces a system capacity, or even leads to a call
drop and blocking.
[0006] To make full use of advantages of the TDD system,
dynamically adjust uplink-downlink resource allocation, and improve
spectrum efficiency, a proper technical solution needs to be used
to overcome impact of cross-timeslot interference. To reduce or
avoid the cross-timeslot interference, a base station performing
interference suppression needs to learn of an interference status
of a neighboring cell. Therefore, in an application scenario of the
flexible half-duplex technology, how to indicate interference is a
problem that urgently needs to be resolved currently.
SUMMARY
[0007] Embodiments of the present disclosure provide an
interference indication method and apparatus.
[0008] According to a first aspect, an interference indication
method is provided, including detecting, by a base station,
interference from a neighboring cell; and sending, by the base
station, interference indication information to the neighboring
cell, where the interference indication information includes at
least indication information of a frequency resource that receives
the interference from the neighboring cell, and the frequency
resource is a frequency resource configured to be in a flexible
half-duplex mode.
[0009] With reference to the first aspect, in a first possible
implementation of the first aspect, the interference indication
information further includes one piece of or a combination of the
following information: indication information of a subframe that
receives the interference from the neighboring cell and that is on
the frequency resource; indication information of a physical
resource block (PRB) that receives the interference from the
neighboring cell and that is on the frequency resource; or
interference level indication information of the interference from
the neighboring cell.
[0010] With reference to the first possible implementation of the
first aspect, in a second possible implementation of the first
aspect, the subframe that receives the interference from the
neighboring cell and that is on the frequency resource is a
subframe that receives reverse transmission interference from the
neighboring cell and that is on the frequency resource; or the PRB
that receives the interference from the neighboring cell and that
is on the frequency resource is a PRB that receives reverse
transmission interference from the neighboring cell and that is on
the frequency resource.
[0011] With reference to any one of the first aspect or the first
to the second possible implementations of the first aspect, in a
third possible implementation of the first aspect, the interference
indication information is carried in first signaling for
transmission.
[0012] With reference to any one of the first aspect or the first
to the second possible implementations of the first aspect, in a
fourth possible implementation of the first aspect, the
interference indication information is carried in first signaling
and second signaling for transmission, where the first signaling
includes the interference level indication information of the
interference from the neighboring cell, and the second signaling
includes the indication information of the frequency resource that
receives the interference from the neighboring cell.
[0013] With reference to the fourth possible implementation of the
first aspect, in a fifth possible implementation of the first
aspect, the first signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0014] With reference to the first aspect, in a sixth possible
implementation of the first aspect, the interference indication
information is carried in second signaling and overload indication
(OI) signaling for transmission, where the second signaling
includes the indication information of the frequency resource that
receives the interference from the neighboring cell, and the OI
signaling includes interference level indication information of the
interference from the neighboring cell to the frequency resource
indicated by the first interference indication signaling.
[0015] With reference to the sixth possible implementation of the
first aspect, in a seventh possible implementation of the first
aspect, the OI signaling further includes indication information of
a subframe and/or a PRB that receive/receives the interference from
the neighboring cell; or the second signaling further includes
indication information of a subframe and/or a PRB that
receive/receives the interference from the neighboring cell.
[0016] With reference to the first aspect, in an eighth possible
implementation of the first aspect, the interference indication
information is carried in second signaling and high interference
indication (HII) signaling for transmission, where the second
signaling includes the indication information of the frequency
resource that receives the interference from the neighboring cell,
and the HII signaling includes indication information of a PRB that
probably causes interference to the neighboring cell and that is on
the frequency resource indicated by the second signaling.
[0017] With reference to the eighth possible implementation of the
first aspect, in a ninth possible implementation of the first
aspect, the HII signaling further includes indication information
of a subframe that receives the interference from the neighboring
cell, and/or interference level indication information; or the
second signaling further includes indication information of a
subframe and/or a PRB that receive/receives the interference from
the neighboring cell.
[0018] With reference to any one of the first aspect or the first
to the ninth possible implementations of the first aspect, in a
tenth possible implementation of the first aspect, the method
further includes receiving, by the base station, indication
information of a time resource and/or a frequency resource that
are/is configured to be in the flexible half-duplex mode, where the
indication information is sent by the neighboring cell; and/or
sending, by the base station, indication information of a time
resource and/or a frequency resource that are/is configured to be
in the flexible half-duplex mode.
[0019] With reference to the tenth possible implementation of the
first aspect, in an eleventh possible implementation of the first
aspect, the indication information of the time resource and/or the
frequency resource that are/is configured to be, in the flexible
half-duplex mode is sent by means of semi-persistent
broadcasting.
[0020] According to a second aspect, a base station is provided,
including an interference detection module configured to detect
interference from a neighboring cell; and an interference
indication module configured to send interference indication
information to the neighboring cell, where the interference
indication information includes at least indication information of
a frequency resource that receives the interference from the
neighboring cell, and the frequency resource is a frequency
resource configured to be in a flexible half-duplex mode.
[0021] With reference to the second aspect, in a first possible
implementation of the second aspect, the interference indication
information further includes one piece of or a combination of the
following information: indication information of a subframe that
receives the interference from the neighboring cell and that is on
the frequency resource; indication information of a FRB that
receives the interference from the neighboring cell and that is on
the frequency resource; or interference level indication
information of the interference from the neighboring cell.
[0022] With reference to the first possible implementation of the
second aspect, in a second possible implementation of the second
aspect, the subframe that receives the interference from the
neighboring cell and that is on the frequency resource is a
subframe that receives reverse transmission interference from the
neighboring cell and that is on the frequency resource; or the PRB
that receives the interference from the neighboring cell and that
is on the frequency resource is a PRB that receives reverse
transmission interference from the neighboring cell and that is on
the frequency resource.
[0023] With reference to any one of the second aspect or the first
to the second possible implementations of the second aspect, in a
third possible implementation of the second aspect, the
interference indication information is carried in first signaling
for transmission.
[0024] With reference to any one of the second aspect or the first
to the second possible implementations of the second aspect, in a
fourth possible implementation of the second aspect, the
interference indication information is carried in first signaling
and second signaling for transmission, where the first signaling
includes the interference level indication information of the
interference from the neighboring cell, and the second signaling
includes the indication information of the frequency resource that
receives the interference from the neighboring cell.
[0025] With reference to the fourth possible implementation of the
second aspect, in a fifth possible implementation of the second
aspect, the first signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0026] With reference to the second aspect, in a sixth possible
implementation of the second aspect, the interference indication
information is carried in second signaling and OI signaling for
transmission, where the second signaling includes the indication
information of the frequency resource that receives the
interference from the neighboring cell, and the OI signaling
includes interference level indication information of the
interference from the neighboring cell to the frequency resource
indicated by the first interference indication signaling.
[0027] With reference to the sixth possible implementation of the
second aspect, in a seventh possible implementation of the second
aspect, the OI signaling further includes indication information of
a subframe and/or a PRB that receive/receives the interference from
the neighboring cell; or the second signaling further includes
indication information of a subframe and/or a PRB that
receive/receives the interference from the neighboring cell.
[0028] With reference to the second aspect, in an eighth possible
implementation of the second aspect, the interference indication
information is carried in second signaling and HII signaling for
transmission, where the second signaling includes the indication
information of the frequency resource that receives the
interference from the neighboring cell, and the HII signaling
includes indication information of a PRB that probably causes
interference to the neighboring cell and that is on the frequency
resource indicated by the second signaling.
[0029] With reference to the eighth possible implementation of the
second aspect, in a ninth possible implementation of the second
aspect, the HII signaling further includes indications information
of a subframe that receives the interference from the neighboring
cell, and/or interference level indication information; or the
second signaling further includes indication information of a
subframe and/or a PRB that receive/receives the interference from
the neighboring cell.
[0030] 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 following
is further included receiving, by the base station, indication
information of a time resource and/or a frequency resource that
are/is configured to be in the flexible half-duplex mode, where the
indication information is sent by the neighboring cell; and/or
sending, by the base station, indication information of a time
resource and/or a frequency resource that are/is configured to be
in the flexible half-duplex mode.
[0031] With reference to the tenth possible implementation of the
second aspect, in an eleventh possible implementation of the second
aspect, the indication information of the time resource and/or the
frequency resource that are/is configured to be in the flexible
half-duplex mode is sent by means of semi-persistent
broadcasting.
[0032] According to a third aspect, a base station is provided. The
base station includes a processing unit and a memory. The
processing unit is configured to control an operation of the base
station; and the memory is configured to provide an instruction and
data for the processing unit.
[0033] An interference indication procedure implemented by the base
station disclosed in an embodiment of the present disclosure may be
applied to the processing unit or be implemented by the processing
unit. During implementation, steps in the interference indication
procedure implemented by the base station may be implemented using
an integrated logic circuit of hardware in the processing unit, or
using an instruction in a form of software. The steps of the
methods disclosed with reference to this embodiment of the present
disclosure may be directly implemented by a hardware processor, or
may be implemented by a combination of hardware and a software
module in a processor. The software module may be in a random
access memory, a flash memory, a read-only memory, a programmable
read-only memory or an electrically erasable programmable memory, a
register, or another mature storage medium in the art. The storage
medium is located in the memory. The processing unit reads
information in the memory, and completes, with reference to
hardware of the processing unit, the steps of the interference
indication procedure implemented by the base station.
[0034] Specifically, the processing unit may be configured to
execute the foregoing interference indication procedure described
in this embodiment. The procedure may include detecting
interference from a neighboring cell; and sending interference
indication information to the neighboring cell, where the
interference indication information includes at least indication
information of a frequency resource that receives the interference
from the neighboring cell, and the frequency resource is a
frequency resource configured to be in a flexible half-duplex
mode.
[0035] For a specific implementation process, reference may be made
to an one of the first aspect or the possible implementations of
the first aspect, and details are not described herein again.
[0036] In the foregoing embodiments of the present disclosure,
after detecting the interference from the neighboring cell, the
base station sends the interference indication information to the
neighboring cell, where the interference indication information
includes at least the indication information of the frequency
resource that receives the interference from the neighboring cell
and that is configured to be in the flexible half-duplex mode, so
as to indicate that the interference from the neighboring cell is
interference on the frequency resource configured to be in the
flexible half-duplex mode. In this way, in an application scenario
of a flexible half-duplex technology, a base station can learn of a
status of interference from a neighboring cell, so as to use a
corresponding interference suppression mechanism.
BRIEF DESCRIPTION OF DRAWINGS
[0037] To describe the technical solutions in embodiments of the
present disclosure more clearly, the following briefly describes
the accompanying drawings required for describing the embodiments.
Apparently, the accompanying drawings in the following description
show merely 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.
[0038] FIG. 1 is a schematic diagram of an interference indication
procedure according to an embodiment of the present disclosure;
[0039] FIG. 2 is a schematic structural diagram of a base station
according to an embodiment of the present disclosure; and
[0040] FIG. 3 is a schematic structural diagram of a base station
according to another embodiment of the present disclosure.
DESCRIPTION OF EMBODIMENTS
[0041] To make the objectives, technical solutions, and advantages
of the present disclosure clearer, the following further describes
the present disclosure in detail with reference to the accompanying
drawings. Apparently, the described embodiments are merely some
rather than 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.
[0042] In the embodiments of the present disclosure, a base station
may be an evolved. NodeB (eNB or e-NodeB), a macro base station, a
micro base station (also referred to as a "small cell"), a picocell
base station, an access point (AP), a transmission point (TP), or
the like in an LTE system or a Licensed-Assisted Access LTE
(LAA-LTE) system. This is not limited by the present
disclosure.
[0043] In the embodiments of the present disclosure, user equipment
(UE) may be referred to as a terminal, a mobile station (MS), a
mobile terminal, or the like. The user equipment may communicate
with one or more core networks through a radio access network
(RAN). For example, the user equipment may be a mobile phone (also
referred to as a "cellular" phone) or a computer with a mobile
terminal. For example, the user equipment may be a portable mobile
apparatus, a pocket-sized mobile apparatus, a handheld mobile
apparatus, a computer built-in mobile apparatus, or an in-vehicle
mobile apparatus, and they exchange voice and/or data with the
radio access network.
[0044] For ease of description, the base station and the user
equipment are used as examples for description in the following
embodiments.
[0045] It should be understood that, in the embodiments of the
present disclosure, some time resources and/or frequency resources
may be configured as flexible half-duplex time resources and/or
frequency resources. For example, some frequency bands (band) or
frequency subbands (subband), some subframes, or some PRBs may be
configured as flexible half-duplex resources. For example,
operators can use three frequency bands with frequency ranges from
1880 to 1900 megahertz (MHz), from 2320 to 2370 MHz, and from 2575
to 2635 MHz. If channel bandwidth is 20 MHz, 1880 to 1900 MHz, 2320
to 2340 MHz, and 2350 to 2370 MHz are frequency subbands.
[0046] Referring to FIG. 1, FIG. 1 is a schematic diagram of an
interference indication procedure according to an embodiment of the
present disclosure. The procedure may be executed by a base
station.
[0047] As shown in the figure, the procedure may include the
following steps.
[0048] Step 101: The base station detects interference from a
neighboring cell.
[0049] In this step, the base station may detect the interference
from the neighboring cell according to a signal sent by or a
measurement report reported by a terminal in a coverage area of the
base station. For example, from a perspective of an uplink, the
base station may detect, according to an uplink signal sent by the
terminal, interference received by each PRB; from a perspective of
a downlink, the base station may detect interference according to
reference signal received quality (RSRQ) or a signal to
interference plus noise ratio (SINR) reported by the terminal.
[0050] Step 102: The base station sends interference indication
information to the neighboring cell, where the interference
indication information includes at least indication information of
a frequency resource that receives the interference from the
neighboring cell, the frequency resource is a frequency resource
configured to be in a flexible half-duplex mode, and the frequency
resource includes one or a combination of a frequency band, a
frequency subband, a partial frequency hand, or a partial frequency
subband.
[0051] In step 102, the base station may send, using an inter-base
station link (such as an X2 interface the foregoing interference
indication information to a base station serving the neighboring
cell.
[0052] By performing step 102, the base station may indicate, using
the interference indication information, which frequency band,
frequency subband, partial frequency band, or partial frequency
subband, on the frequency resource that is of the base station and
that is configured to be in the flexible half-duplex mode, receives
the interference from the neighboring cell. The indication
information of the frequency resource included in the interference
indication information may be frequency-range information of the
frequency band, the frequency subband, the partial frequency band,
or the partial frequency subband. Preferably, to reduce signaling
overheads, the indication information of the frequency resource may
alternatively be represented by an identity of the frequency band,
the frequency subband, the partial frequency band, or the partial
frequency subband. Each frequency hand, frequency subband, partial
frequency band, or partial frequency subband is identified using a
unique identifier (ID).
[0053] Preferably, the interference indication information not only
includes the indication information of the frequency resource
configured to be in the flexible half-duplex mode, but also may
include one piece of or a combination of the following information:
indication information of a subframe that receives the interference
from the neighboring cell and that is on the frequency resource
configured to be in the flexible half-duplex mode, where the
indication information of the subframe may be specifically a
subframe index; indication information of a PRB that receives the
interference from the neighboring cell and that is on the frequency
resource configured to be in the flexible half-duplex mode, where
the indication information of the PRB may be specifically a PRB
index, such as a PRB number; or interference level indication
information of the interference from the neighboring cell, where an
interference level may be specifically defined according to an
existing protocol, or may be redefined.
[0054] Further, if the base station is capable of learning of an
uplink-downlink timeslot configuration of the neighboring cell, the
base station may detect in step 101 whether the interference from
the neighboring cell is reverse transmission interference. If the
interference is the reverse transmission interference, there are
two cases: In step 102, if the interference indication information
includes the indication information of the subframe that receives
the interference from the neighboring cell and that is on the
frequency resource, the subframe is a subframe that receives the
reverse transmission interference from the neighboring cell and
that is on the frequency resource configured to be in the flexible
half-duplex mode; or if the interference indication information
includes the indication information of the PRB that receives the
interference from the neighboring cell and that is on the frequency
resource, the PRB is a PRB that receives the reverse transmission
interference from the neighboring cell and that is on the frequency
resource configured to be in the flexible half-duplex mode.
[0055] For example, a cell A detects interference from a cell B.
Reverse transmission interference from the cell B to the cell A is
interference from a downlink of the cell B to the cell A in an
uplink transmission time period of the cell A or interference from
an uplink of the cell B to the cell A in a downlink transmission
time period of the cell A. The cell A is capable of learning of an
uplink-downlink timeslot configuration of the cell B. Therefore,
when the cell A receives the interference from the cell B in the
uplink transmission time period of the cell A, if the cell A
determines, according to the uplink-downlink timeslot configuration
of the cell B, that the cell B performs downlink transmission in
this time period, the interference from the cell B in this time
period is considered to be reverse transmission interference.
Similarly, when the cell A receives the interference from the cell
B in the downlink transmission time period of the cell A, if the
cell A determines, according to the uplink-downlink timeslot
configuration of the cell B, that the cell B performs uplink
transmission in this time period, the interference from the cell B
in this time period is considered to be reverse transmission
interference.
[0056] Preferably, for the foregoing cases, in some embodiments,
the interference indication information may carry additional
indication information, to indicate whether the detected
interference from the neighboring cell is reverse transmission
interference. For example, the interference indication information
may carry an indication identifier, to indicate whether the
interference is reverse transmission interference from the
neighboring cell. Alternatively, an indication identifier may be
set for each frequency band, frequency subband, partial frequency
band, partial frequency subband, subframe, or PRB, to indicate
whether interference received by a corresponding frequency band,
frequency subchannel, partial frequency band, partial frequency
subband, subframe, or PRB is reverse transmission interference from
the neighboring cell. Certainly, for the foregoing cases, the
interference that is from the neighboring cell and that is
indicated by the interference indication information may be
considered to be reverse transmission interference by default.
[0057] In the foregoing procedure, the interference indication
information may be carried in signaling for transmission. Several
preferred solutions of sending the foregoing interference
indication information by means of signaling are provided in this
embodiment of the present disclosure. Respective descriptions are
given below.
[0058] Solution (1): Asymmetric link direction indicator (ALI)
signaling is used alone.
[0059] In solution (1), a new type of signaling is used to carry
the foregoing interference indication information and is
particularly applied to a scenario in which the interference
indicated by the interference indication information is reverse
transmission interference from the neighboring cell. Herein, the
newly-used signaling is referred to as first signaling or ALI
signaling. In the following descriptions, the signaling is referred
to as the ALI signaling.
[0060] The ALI signaling includes the indication information of the
frequency resource that receives the interference from the
neighboring cell and that is configured to be in the flexible
half-duplex mode, and the indication information of the subframe
and/or the PRB that receive/receives the interference from the
neighboring cell and that are/is on the frequency resource.
Further, the ALI signaling may further include the interference
level indication information. In this way, when only the ALI
signaling is configured, the ALI signaling may be used to indicate
which frequency band, frequency subband, partial frequency band, or
partial frequency subband on the frequency resource configured to
be in the flexible half-duplex mode receives the reverse
transmission interference from the neighboring cell, and which
subframe and/or PRB on the frequency resource receive/receives the
reverse transmission interference from the neighboring cell, and
may further indicate severity of the received interference.
[0061] During specific implementation, for each frequency resource
configured to be in the flexible half-duplex mode, such as a
frequency band, a frequency subband, a partial frequency, band, or
a partial frequency subband, a subframe and/or a PRB that
receive/receives the reverse transmission interference from the
neighboring cell and that are/is on the frequency resource and an
interference status of the subframe and/or the PRB may be
separately indicated. In this case, ALI indication information
corresponding to different frequency resources configured to be in
the flexible half-duplex triode may be different. For example, ALI
indication information corresponding to a frequency band or
frequency subband includes a reverse transmission indication
identifier, or a value of the identifier is used to represent
reverse transmission interference, while ALI indication information
corresponding to another frequency band or frequency subband does
not include the reverse transmission indication identifier, or a
value of the identifier is used to represent codirectional
transmission interference.
[0062] For an ALI signaling format, reference may be made to an OI
signaling format. Table 1 shows an example of an ALI signaling
format.
TABLE-US-00001 TABLE 1 ALI signaling format IE/group name Presence
Range IE type and reference (Information (Mandatory (Value
(Information element Semantics description element/group name) or
optional) range) type and description) (Description) Cross Link 1 .
. . <maxnoofPRBs> interference Overload Indication List
(cross link interference overload indication list) >subband
index O (Optional) (frequency subband index) >subframe index O
(Optional) (subframe index) >UL Interference M Enumeration A
location of each PRB Overload Indication (Mandatory) (high
interference, in the list is used to (uplink interference moderate
interference, identify the PRB. For overload indication) low
interference, . . . ) example, the first IE in the list is
corresponding to a PRB 0, the second IE is corresponding to a PRB
1, and so on.
[0063] In Table 1, a value of maxnoofPRBs is a maximum value of a
PRB number, such as 110.
[0064] Solution (2): resource indicator (R_ind) signaling is used
together with ALI signaling.
[0065] In solution (2), a new type of signaling is used together
with the ALI signaling, to carry the interference indication
information. Herein, the newly-used signaling is referred to as
second signaling or the R_ind signaling. In the following
descriptions, the signaling is referred to as the R_ind
signaling.
[0066] The R_ind signaling includes the indication information of
the frequency resource that receives the interference from the
neighboring cell and that is configured to be in the flexible
half-duplex mode. A frequency resource indicated by an R_ind may be
any frequency division duplex (FDD) UL frequency band. The ALI
signaling may include the interference level indication information
of the interference from the neighboring cell.
[0067] Further, in some embodiments, the R_ind signaling may
further include the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell and that are/is on the frequency resource. In some other
embodiments, the ALI signaling may further include indication
information of a subframe and/or a PRB that receive/receives the
interference from the neighboring cell and that are/is on the
frequency resource indicated by the R_ind signaling.
[0068] Preferably, the R_ind signaling and the ALI signaling may be
periodically sent, and a sending period of the R_ind signaling may
be different from a sending period of the ALI signaling.
[0069] Solution (3): R_ind signaling is used together with OI
signaling.
[0070] In an LIE system, an OI is obtained based on a measurement.
A source cell (or a source base station) that sends the OI
indicates an interference status of each PRB of the cell using the
OI, and the interference is classified into three levels: high,
moderate, and low. In a neighboring cell that receives the OI,
interference power adjustment and user scheduling adjustment may be
performed on a corresponding PRB according to the received OI, so
that the interference from the source cell to the neighboring cell
is alleviated.
[0071] In the solution in which the R_ind signaling is used
together with the OI signaling, the R_ind signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell and that is configured to be
in the flexible half-duplex mode, and the OI signaling includes the
interference level indication information of the interference from
the neighboring cell.
[0072] Further, in some embodiments, the R_ind signaling may
further include the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell and that are/is on the frequency resource. In some other
embodiments, the OI signaling may further include indication
information of a subframe and/or a PRB that receive/receives the
interference from the neighboring cell and that are/is on the
frequency resource indicated by the R_ind signaling.
[0073] The OI may be interpreted correspondingly based on the
R_ind. For example, in some embodiments, if an R_ind sent by a
small cell indicates a frequency band or a frequency subband and a
specific subframe set of the small cell, an OI sent by the small
cell means that on a resource indicated by the R_ind, some PRBs of
the small cell receive interference.
[0074] Preferably, the R_ind signaling and the OI signaling may be
periodically sent, and a sending period of the R_ind signaling may
be different from a sending period of the OI signaling.
[0075] Solution (4): R_ind signaling is used together with HII
signaling.
[0076] An HII indicates PRBs that will be allocated by the cell to
an edge user in a period of time in future, so that a neighboring
cell avoids using these PRBs as much as possible while performing
scheduling for the edge user. The HII is scheduling information
based on the edge user of the cell. In a source cell (or a source
base station) that sends the HII, the HII is used to indicate a
status of resource blocks that will be allocated by the cell to an
edge terminal of the cell. These resource blocks cause relatively
high interference to a neighboring base station, and are rather
sensitive to interference from the neighboring base station. In a
destination cell that receives the HII, resource blocks that are of
a neighboring cell and that will cause strong interference are
determined by monitoring the HII of the neighboring cell.
Scheduling avoidance or power adjustment is implemented for these
resource blocks.
[0077] In the solution in which the R_ind signaling is used
together with the HII signaling, the R_ind signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell and that is configured to be
in the flexible half-duplex mode, and the HII signaling includes
indication information of a PRB that probably causes interference
to the neighboring cell and that is on the frequency resource
indicated by the R_ind signaling.
[0078] Further, in some embodiments, the R_ind signaling may
further include the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell and that are/is on the frequency resource. In some other
embodiments, the HII signaling may further include indication
information of a subframe that receives the interference from the
neighboring cell and that is on the frequency resource indicated by
the R_ind signaling, and/or interference level indication
information.
[0079] The HII is interpreted correspondingly based on an R_ind.
For example, if an R_ind sent by a macro cell indicates a frequency
band or a frequency subband and a downlink subframe of the macro
cell, an HII sent by the macro cell means that downlink
transmission of the macro cell may cause high interference to
uplink transmission of a small cell.
[0080] Further, new signaling may be further used in this
embodiment of the present disclosure, and the signaling is used to
indicate a time resource and/or a frequency resource that are/is
configured to be in the flexible half-duplex mode. In this
embodiment of the present disclosure, the signaling is referred to
as a flexible duplex resource indication (FD.sub.res_ind).
[0081] Specifically, the FD.sub.res_ind signaling may include one
piece of or a combination of the following information: indication
information of a frequency resource configured to be in the
flexible half-duplex mode, where the frequency resource may
specifically include one or a combination of a frequency band, a
frequency subband, a partial frequency band, or a partial frequency
subband, and the indication information of the frequency resource
may be identity information of the frequency band, the frequency
subband, the partial frequency band, or the frequency subband;
indication information of a subframe configured to be in the
flexible half-duplex mode, where the indication information of the
subframe may be specifically a subframe index; or indication
information of a PRB configured to be in the flexible half-duplex
mode, where the indication information of the PRB may be
specifically a PRB index, such as a PRB number.
[0082] Further, when a source base station that sends the
FD.sub.res_ind signaling is capable of learning of an
uplink-downlink timeslot configuration of a neighboring cell (or a
neighboring base station), a transmission direction of the time
resource and/or the frequency resource that are/is configured to be
in the flexible half-duplex mode and that are/is indicated by the
FD.sub.res_ind signaling is opposite to a transmission direction of
a resource of the neighboring cell in a same time period, that is,
transmission, performed by the cell or base station that sends the
FD.sub.res_ind signaling, on the time resource and/or the frequency
resource indicated by the FD.sub.res_ind signaling may cause
reverse transmission interference to the neighboring cell.
[0083] Preferably, the FD.sub.res_ind signaling may be sent by
means of semi-persistent broadcasting. For example, the
FD.sub.res_ind signaling may be operation and management (OAM)
configuration signaling, or X2 interface signaling, or may be over
the air (OTA) interface signaling.
[0084] The FD.sub.res_ind signaling may be configured to be sent by
a macro-cell base station, or may be configured to be sent by a
small-cell base station.
[0085] The FD.sub.res_ind signaling may also be used together with
the foregoing signaling used for interference indication. The
following describes several solutions in which the FD.sub.res_ind
signaling is used together with another signaling.
[0086] Solution (5): FD.sub.res_ind signaling is used together with
OI signaling.
[0087] For example, the FD.sub.res_ind signaling is configured to
be sent by a macro-cell base station. A small-cell base station may
learn, according to the FD.sub.res_ind signaling sent by the
macro-cell base station, of a time resource and/or a frequency
resource that are/is configured to be in the flexible half-duplex
mode. After receiving OI signaling sent by the macro-cell base
station, a small cell may perform interference suppression
according to an uplink-downlink timeslot configuration of a macro
cell. In addition, the small cell may send OI signaling to the
macro-cell base station, to indicate that the small cell receives
interference from the macro cell.
[0088] Solution (6): FD.sub.res_ind signaling is used together with
HII signaling.
[0089] For example, the FD.sub.res_ind signaling is configured to
be sent by a macro-cell base station. A small-cell base station may
learn, according to the FD.sub.res_ind signaling sent by the
macro-cell base station, of a time resource and/or a frequency
resource that are/is configured to be in the flexible half-duplex
mode. After receiving signaling sent by the macro-cell base
station, a small cell may perform interference suppression
according to an uplink-downlink timeslot configuration of a macro
cell. In addition, the small cell may send HII signaling to the
macro-cell base station, to indicate that the small cell may cause
interfere to the macro cell.
[0090] Solution (7): FD.sub.res_ind signaling is used together with
ALI signaling.
[0091] For example, the FD.sub.res_ind signaling is configured to
be sent by a macro-cell base station. A small-cell base station may
learn, according to the FD.sub.res_ind signaling sent by the
macro-cell base station, of a time resource and/or a frequency
resource that are/is configured to be in the flexible half-duplex
mode. A small cell may send ALI signaling to the macro-cell base
station, to indicate that the small cell receives interference from
a macro cell on the frequency resource indicated by the
FD.sub.res_ind signaling. Further, interference indicated by the
ALI signaling is reverse transmission interference received by the
small cell from the macro cell.
[0092] Solution (8): FD.sub.res_ind signaling is used together with
ALI signaling and R_ind signaling.
[0093] For example, the FD.sub.res_ind signaling is configured to
be sent by a macro-cell base station. A small-cell base station may
learn, according to the FD.sub.res_ind signaling sent by the
macro-cell base station, of a time resource and/or a frequency
resource that are/is configured to be in the flexible half-duplex
mode. A small cell may send. ALI signaling and R_ind signaling to
the macro-cell base station. The R_ind signaling is used to
indicate that the small cell receives interference from a macro
cell on the frequency resource indicated by the FD.sub.res_ind
signaling, and the ALI signaling is used to indicate an
interference level of the interference received by small cell.
[0094] To sum up, in the foregoing embodiment of the present
disclosure, after detecting the interference from the neighboring
cell, the base station sends the interference indication
information to the neighboring cell, where the interference
indication information includes at least the indication information
of the frequency resource that receives the interference from the
neighboring cell and that is configured to be in the flexible
half-duplex mode, so as to indicate that the interference from the
neighboring cell is interference on the frequency resource
configured to be in the flexible half-duplex mode. In this way, in
an application scenario of a flexible half-duplex technology, a
base station can learn of a status of interference from a
neighboring cell, so as to use a corresponding interference
suppression mechanism.
[0095] For better understanding of this embodiment of the present
disclosure, the following describes an implementation process of
the foregoing embodiment in detail using a specific scenario as an
example.
Scenario 1
[0096] A macro cell is adjacent to a small cell. Both the macro
cell and the small cell are operating on a frequency subband
subband i, and the subband i is a frequency subband configured to
be in the flexible half-duplex mode.
[0097] An uplink-downlink timeslot configuration of the macro cell
on the subband i is presented in Table 2 in a sequence from a
subframe 0 to a subframe 9.
TABLE-US-00002 TABLE 2 Uplink-downlink timeslot configuration of
the macro cell on the subband i Subframe 0 Subframe 1 Subframe 2
Subframe 3 Subframe 4 Subframe 5 Subframe 6 Subframe 7 Subframe 8
Subframe 9 D S U D D D S U D D
[0098] An uplink-downlink timeslot configuration of the small cell
on the subband i is presented in Table 3 in a sequence from a
subframe 0 to a subframe 9.
TABLE-US-00003 TABLE 3 Uplink-downlink timeslot configuration of
the small cell on the subband i Subframe 0 Subframe 1 Subframe 2
Subframe 3 Subframe 4 Subframe 5 Subframe 6 Subframe 7 Subframe 8
Subframe 9 D S U U D D S U U D
[0099] D represents a downlink subframe, U represents an uplink
subframe, and S represents a special subframe.
[0100] 01001 When the foregoing solution (1) is used, if on the
subband i, a small-cell base station detects that there is high
interference in the subframe 3 (an uplink subframe), the small-cell
base station sends ALI signaling to a macro-cell base station, to
indicate PRBs that receive interference and that are on the
subframe 3 of the subband i configured to be in the flexible
half-duplex mode. Further, if the small cell is capable of learning
of the uplink-downlink timeslot configuration of the macro cell,
the small-cell base station can determine the interference on the
subframe 3 is reverse transmission interference from the macro
cell, so that PRBs that receive reverse transmission interference
from a neighboring cell and that are on the subframe 3 of the
subband i configured to be in the flexible half-duplex mode can be
indicated using the ALI signaling.
[0101] When the foregoing solution (2) is used, if on the subband
i, a small-cell base station detects that there is high
interference in the subframe 3 (an uplink subframe), the small-cell
base station sends ALI signaling and R_ind signaling to a
macro-cell base station. The R_ind signaling is used to indicate
that the small cell receives interference from a macro cell on the
subband i configured to be in the flexible half-duplex mode, and
the AU signaling is used to indicate PRBs that receive interference
and that are on the subframe 3 of the subband i.
[0102] When the foregoing solution (3) is used, if on the subband
i, a small-cell base station detects that there is high
interference in the subframe 3 (an uplink subframe), the small-cell
base station sends OI signaling and R_ind signaling to a macro-cell
base station. The R_ind signaling is used to indicate that the
small cell receives interference from a macro cell on the subframe
3 of the subband i configured to be in the flexible half-duplex
mode, and the OI signaling is used to indicate an interference
level of the interference received by the small cell.
Scenario 2
[0103] A macro cell is adjacent to a small cell. Both the macro
cell and the small cell are operating on a frequency subband
subband I, and the subband I is a frequency subband configured to
be in the flexible half-duplex mode.
[0104] An uplink-downlink timeslot configuration of the macro cell
on the subband i is presented in Table 2 in a sequence from a
subframe 0 to a subframe 9.
TABLE-US-00004 TABLE 2 Uplink-downlink timeslot configuration of
the macro cell on the subband I Subframe 0 Subframe 1 Subframe 2
Subframe 3 Subframe 4 Subframe 5 Subframe 6 Subframe 7 Subframe 8
Subframe 9 D S U U D D S U U D
[0105] An uplink-downlink timeslot configuration of the small cell
on the subband I is presented in Table 3 in a sequence from a
subframe 0 to a subframe 9.
TABLE-US-00005 TABLE 3 Uplink-downlink timeslot configuration of
the small cell on the subband I Subframe 0 Subframe 1 Subframe 2
Subframe 3 Subframe 4 Subframe 5 Subframe 6 Subframe 7 Subframe 8
Subframe 9 D S U D D D S U D D
[0106] D represents a downlink subframe, U represents an uplink
subframe, and S represents a special subframe.
[0107] When the foregoing solution (3) is used, if on the subband
I, a small-cell base station detects that there is high
interference in the subframe 2 (an uplink subframe) but not in the
subframe 3 (a downlink subframe), the small-cell base station sends
R_ind signaling and OI signaling to a macro-cell base station. The
R_ind signaling is used to indicate that the small cell receives
interference from the macro cell on the subframe 2 of the subband I
configured to be in the flexible half-duplex mode, and the OI
signaling is used to indicate an interference level.
[0108] After receiving the R_ind signaling and the OI signaling
sent by the small cell, the macro-cell base station may perform
power control and/or scheduling restriction for the subframe 2 of
the subband I, but not performs power control and/or scheduling
restriction for all uplink frequency bands or frequency subbands,
so as to improve resource efficiency.
Scenario 3
[0109] A macro cell is adjacent to a small cell. Both the macro
cell and the small cell are operating on a frequency subband
subband I, and a subframe 3 of the subband I is configured to be in
the flexible half-duplex mode.
[0110] The macro cell notifies, by sending FD.sub.res_ind
signaling, a neighboring cell that the subframe 3 of the subband I
is configured to be in the flexible half-duplex mode.
[0111] The small cell learns, according to the FDres_ind signaling
sent by the macro cell that the subframe 3 of the subband I is
configured to be in the flexible half-duplex mode. Therefore, when
detecting interference from the macro cell on the subframe 3 of the
subband I, the small cell sends ALI signaling to the macro cell, to
indicate to the macro cell that some PRBs on the subframe 3 of the
subband I receive the interference from the macro cell. A
macro-cell base station may further perform a measurement for the
subframe 3 of the subband I according to the ALI signaling, and
perform interference suppression according to a result of the
measurement.
[0112] In some other scenarios, when the macro cell uses a type of
uplink-downlink timeslot configuration with relatively many uplink
transmissions, to save energy in a low-load state, the macro cell
may restrict most uplink transmissions to one uplink frequency
resource, and another uplink frequency resource may be almost idle
(that is, no user equipment is scheduled to send data on this
uplink frequency resource). In this case, the macro-cell base
station may notify, by sending R_ind signaling and HII signaling,
the neighboring cell that the uplink frequency, resource and a
subframe of the uplink frequency resource receive interference. In
this way, scheduling flexibility can be improved and
neighboring-cell resource utilization can be improved more
effectively.
[0113] Based on the same technical conception, an embodiment of the
present disclosure further provides a base station.
[0114] Referring to FIG. 2, FIG. 2 is a schematic structural
diagram of a base station according to an embodiment of the present
disclosure. The base station may include an interference detection
module 201 and an interference indication module 202.
[0115] The interference detection module 201 is configured to
detect interference from a neighboring cell.
[0116] The interference indication module 202 is configured to send
interference indication information to the neighboring cell, where
the interference indication information includes at least
indication information of a frequency resource that receives the
interference from the neighboring cell, the frequency resource is a
frequency resource configured to be in a flexible half-duplex mode,
and the frequency resource includes one or a combination of a
frequency band, a frequency subband, a partial frequency band, or a
partial frequency subband.
[0117] Preferably, the interference indication information further
includes one piece of or a combination of the following
information: indication information of a subframe that receives the
interference from the neighboring cell and that is on the frequency
resource; indication information of a PRB that receives the
interference from the neighboring cell and that is on the frequency
resource; or interference level indication information of the
interference from the neighboring cell.
[0118] The subframe that receives the interference from the
neighboring cell and that is on the frequency resource is a
subframe that receives reverse transmission interference from the
neighboring cell and that is on the frequency resource; or the PRB
that receives the interference from the neighboring cell and that
is on the frequency resource is a PRB that receives reverse
transmission interference from the neighboring cell and that is on
the frequency resource.
[0119] Preferably, in some embodiments, the interference indication
information is carried in first signaling for transmission.
[0120] Preferably, in some other embodiments, the interference
indication information is carried in first signaling and second
signaling for transmission. The first signaling includes the
interference level indication information of the interference from
the neighboring cell, and the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell.
[0121] Further, the first signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0122] Preferably, in some other embodiments, the interference
indication information is carried in second signaling and OI
signaling for transmission, where the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell, and the OI signaling
includes interference level indication information of the
interference from the neighboring cell to the frequency resource
indicated by the first interference indication signaling.
[0123] Further, the OI signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0124] Preferably, in some other embodiments, the interference
indication information is carried in second signaling and HII
signaling for transmission, where the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell, and the HII signaling
includes indication information of a PRB that probably causes
interference to the neighboring cell and that is on the frequency
resource indicated by the second signaling.
[0125] Further, the HII signaling further includes the indication
information of the subframe that receives the interference from the
neighboring cell, and/or the interference level indication
information; or the second signaling further includes the
indication information of the subframe and/or the PRB that
receive/receives the interference from the neighboring cell.
[0126] Further, in some embodiments, the base station further
receives indication information of a time resource and/or a
frequency resource that are/is configured to be in the flexible
half-duplex mode, where the indication information is sent by the
neighboring cell; and/or the base station may send indication
information of a time resource and/or a frequency resource that
are/is configured to be in the flexible half-duplex mode.
Preferably, the indication information of the time resource and/or
the frequency resource that are/is configured to be in the flexible
half-duplex mode is sent by means of semi-persistent
broadcasting.
[0127] Based on the same technical conception, an embodiment of the
present disclosure further provides a base station.
[0128] Referring to FIG. 3, FIG. 3 is a schematic structural
diagram of a base station according to an embodiment of the present
disclosure.
[0129] As shown in the figure, the base station may include an
interface 301, a processing unit 302, and a memory 303. The
processing unit 302 is configured to control an operation of the
base station. The memory 303 may include a read-only memory and a
random access memory and is configured to provide an instruction
and data for the processing unit 302. A part of the memory 303 may
further include a non-volatile random access memory (NVRAM).
Components of the base station are coupled together using a bus
system. In addition to a data bus, the bus system 309 includes a
power bus, a control bus, and a state signal bus. However, for
clear description, various buses are marked as the bus system 309
in the figure.
[0130] An interference indication procedure implemented by the base
station disclosed in this embodiment of the present disclosure may
be applied to the processing unit 302 or be implemented by the
processing unit 302. During implementation, steps in the
interference indication procedure implemented by the base station
may be implemented using an integrated logic circuit of hardware in
the processing unit 302, or using an instruction in a form of
software. The processing unit 302 may be a general purpose
processor, a digital signal processor, an application-specific
integrated circuit, a field programmable gate array or another
programmable logic device, a discrete gate or a transistor logic
device, or a discrete hardware component. The processing unit 302
may implement or execute methods, steps, or logical schematic
diagrams disclosed in this embodiment of the present disclosure.
The general purpose processor may be a microprocessor, any
conventional processor, or the like. The steps of the methods
disclosed with reference to this embodiment of the present
disclosure may be directly implemented by a hardware processor, or
may be implemented by a combination of hardware and a software
module in a processor. The software module may be in a random
access memory, a flash memory, a read-only memory, a programmable
read-only memory or an electrically erasable programmable memory, a
register, or another mature storage medium in the art. The storage
medium is located in the memory 303. The processing unit 302 reads
information in the memory 303 and completes, with reference to
hardware of the processing unit 302, the steps of the interference
indication procedure implemented by the base station.
[0131] Specifically, the processing unit 302 may be configured to
execute the interference indication procedure described in the
foregoing embodiment. The procedure may include detecting
interference from a neighboring cell; and sending interference
indication information to the neighboring cell, where the
interference indication information includes at least indication
information of a frequency resource that receives the interference
from the neighboring cell, the frequency resource is a frequency
resource configured to be in a flexible half-duplex mode, and
preferably, the frequency resource includes one or a combination of
a frequency band, a frequency subband, a partial frequency band, or
a partial frequency subband.
[0132] Preferably, the interference indication information further
includes one piece of or a combination of the following
information: indication information of a subframe that receives the
interference from the neighboring cell and that is on the frequency
resource; indication information of a PRB that receives the
interference from the neighboring cell and that is on the frequency
resource; or interference level indication information of the
interference from the neighboring cell.
[0133] The subframe that receives the interference from the
neighboring cell and that is on the frequency resource is a
subframe that receives reverse transmission interference from the
neighboring cell and that is on the frequency resource; or the PRB
that receives the interference from the neighboring cell and that
is on the frequency resource is a PRB that receives reverse
transmission interference from the neighboring cell and that is on
the frequency resource.
[0134] Preferably, in some embodiments, the interference indication
information is carried in first signaling for transmission.
[0135] Preferably, in some other embodiments, the interference
indication information is carried in first signaling and second
signaling for transmission. The first signaling includes the
interference level indication information of the interference from
the neighboring cell, and the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell.
[0136] Further, the first signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0137] Preferably, in some other embodiments, the interference
indication information is carried in second signaling and OI
signaling for transmission, where the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell, and the OI signaling
includes interference level indication information of the
interference from the neighboring cell to the frequency resource
indicated by the first interference indication signaling.
[0138] Further, the OI signaling further includes the indication
information of the subframe and/or the PRB that receive/receives
the interference from the neighboring cell; or the second signaling
further includes the indication information of the subframe and/or
the PRB that receive/receives the interference from the neighboring
cell.
[0139] Preferably, in some other embodiments, the interference
indication information is carried in second signaling and HII
signaling for transmission, where the second signaling includes the
indication information of the frequency resource that receives the
interference from the neighboring cell, and the HII signaling
includes indication information of a PRB that probably causes
interference to the neighboring cell and that is on the frequency
resource indicated by the second signaling.
[0140] Further, the HII signaling further includes the indication
information of the subframe that receives the interference from the
neighboring cell, and/or the interference level indication
information; or the second signaling further includes the
indication information of the subframe and/or the PRB that
receive/receives the interference from the neighboring cell.
[0141] Further, in some embodiments, the base station further
receives indication information of a time resource and/or a
frequency resource that are/is configured to be in the flexible
half-duplex mode, where the indication information is sent by the
neighboring cell; and/or the base station may send indication
information of a time resource and/or a frequency resource that
are/is configured to be in the flexible half-duplex mode.
Preferably, the indication information of the time resource and/or
the frequency resource that are/is configured to be in the flexible
half-duplex mode is sent by means of semi-persistent
broadcasting.
[0142] Persons skilled in the art should understand that the
embodiments of the present disclosure may be provided as a method,
a system, or a computer program product. Therefore, the present
disclosure may use a form of hardware only embodiments, software
only embodiments, or embodiments with a combination of software and
hardware. Moreover, the present disclosure may use a form of a
computer program product that is implemented on one or more
computer-usable storage media (including but not limited to a disk
memory, a compact disc read-only memory (CD-ROM), an optical
memory, and the like) that include computer-usable program
code.
[0143] The present disclosure is described with reference to the
flowcharts and/or block diagrams of the method, the device
(system), and the computer program product according to the
embodiments of the present disclosure. It should be understood that
computer program instructions may be used to implement each process
and/or each block in the flowcharts and/or the block diagrams and a
combination of a process and/or a block in the flowcharts and/or
the block diagrams. These computer program instructions may be
provided for a general-purpose computer, a dedicated computer, an
embedded processor, or a processor of any other programmable data
processing device, so that the instructions executed by the
computer or the processor of any other programmable data processing
device may implement a specific function in one or more processes
in the flowcharts and/or in one or more blocks in the block
diagrams.
[0144] These computer program instructions may be stored in a
computer readable memory that can instruct the computer or any
other programmable data processing device to work in a specific
manner, so that the instructions stored in the computer readable
memory generate an artifact that includes an instruction apparatus.
The instruction apparatus implements a specific function in one or
more processes in the flowcharts and/or in one or more blocks in
the block diagrams.
[0145] These computer program instructions may also be loaded onto
a computer or another programmable data processing device, so that
a series of operations and steps are performed on the computer or
the another programmable device, thereby generating
computer-implemented processing. Therefore, the instructions
executed on the computer or the another programmable device provide
steps for implementing a specific function in one or more processes
in the flowcharts and/or in one or more blocks in the block
diagrams.
[0146] Although some preferred embodiments of the present
disclosure have been described, persons skilled in the art can make
changes and modifications to these embodiments once they learn of
the basic inventive concept. Therefore, the following claims are
intended to be construed as to cover the preferred embodiments and
all changes and modifications falling within the scope of the
present disclosure.
[0147] Obviously, persons skilled in the art can make various
modifications and variations to the present disclosure without
departing from the spirit and scope of the present disclosure. The
present disclosure is intended to cover these modifications and
variations provided that they fall within the scope of protection
defined by the claims of the present disclosure and their
equivalent technologies.
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