U.S. patent application number 16/301164 was filed with the patent office on 2020-03-19 for information transmission method and device, and storage medium.
The applicant listed for this patent is ZTE CORPORATION. Invention is credited to Bo DAI, Jianqiang DAI, Xun YANG.
Application Number | 20200092892 16/301164 |
Document ID | / |
Family ID | 60304541 |
Filed Date | 2020-03-19 |
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United States Patent
Application |
20200092892 |
Kind Code |
A9 |
YANG; Xun ; et al. |
March 19, 2020 |
INFORMATION TRANSMISSION METHOD AND DEVICE, AND STORAGE MEDIUM
Abstract
Provided is an information transmission method, including that:
a base station acquires indication information for a target
terminal and sends the indication information to the target
terminal; and the target terminal receives the indication
information from the base station, and cancels interference based
on the indication information during data reception of multi-user
superposition. Also an information transmission device and a
storage medium are provided.
Inventors: |
YANG; Xun; (Shenzhen,
CN) ; DAI; Bo; (Shenzhen, CN) ; DAI;
Jianqiang; (Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ZTE CORPORATION |
Shenzhen |
|
CN |
|
|
Prior
Publication: |
|
Document Identifier |
Publication Date |
|
US 20190313417 A1 |
October 10, 2019 |
|
|
Family ID: |
60304541 |
Appl. No.: |
16/301164 |
Filed: |
May 10, 2017 |
PCT Filed: |
May 10, 2017 |
PCT NO: |
PCT/CN2017/083820 PCKC 00 |
371 Date: |
November 13, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04L 5/0037 20130101;
H04L 5/0005 20130101; H04W 88/02 20130101; H04W 72/042 20130101;
H04L 5/0053 20130101; H04L 5/0062 20130101; H04L 5/0051 20130101;
H04L 5/0091 20130101; H04W 72/082 20130101; H04W 72/04
20130101 |
International
Class: |
H04W 72/08 20060101
H04W072/08; H04W 72/04 20060101 H04W072/04 |
Foreign Application Data
Date |
Code |
Application Number |
May 13, 2016 |
CN |
201610322443.1 |
Nov 4, 2016 |
CN |
201610965396.2 |
Claims
1. A method for information transmission, comprising: acquiring
indication information for a target terminal; and sending the
indication information to the target terminal, wherein the
indication information comprises: an interference presence
Identification (ID); a modulation order of an interference signal;
and a Demodulation Reference Signal (DMRS) port used by an
interference terminal or a DMRS port used by a target terminal.
2-4. (canceled)
5. The method according to claim 1, wherein the interference
presence ID and the modulation order of the interference signal are
indicated jointly.
6. (canceled)
7. The method according to claim 5, wherein the DMRS port used by
the interference terminal is acquired according to the DMRS port
used by the target terminal.
8-17. (canceled)
18. The method according to claim 1, further comprising: responsive
to that a data transmission mode is MUST, determining according to
a predetermined criterion that a DMRS port used by the target
terminal is a first port and DMRS port used by an interference
terminal is a second port, and sending data based on the first port
and the second port, wherein the DMRS port used by the target
terminal is one-to-one mapping with the DMRS port used by the
interference terminal.
19. The method according to claim 18, wherein determining according
to the predetermined criterion that the DMRS port used by the
target terminal is the first port and the DMRS port used by the
interference terminal is the second port comprises: responsive to
that there is one DMRS port used by the target terminal and there
is one DMRS port used by the interference terminal, determining
that a DMRS port number used by the target terminal is 7 and a DMRS
port number used by the interference terminal is 8; or, determining
that a DMRS port number used by the target terminal is 8 and a DMRS
port number used by the interference terminal is 7.
20. A method for information transmission, comprising: receiving
indication information from a base station; and cancelling
interference based on the indication information during data
reception of multi-user superposition, wherein the indication
information comprises: an interference presence Identification
(ID); a modulation order of an interference signal; and a
Demodulation Reference Signal (DMRS) port used by an interference
terminal or a DMRS port used by a target terminal.
21. The method according to claim 20, wherein the interference
presence ID and the modulation order of the interference signal are
indicated by joint coding.
22-24. (canceled)
25. The method according to claim 21, further comprises: acquiring
the sequence number of the DMRS port used by the interference
terminal according to of the DMRS port used by the target
terminal.
26. A device for information transmission, located on a base
station, comprising: an acquisition module and a sending module,
wherein the acquisition module is configured to acquire indication
information for a target terminal; and the sending module is
configured to send the indication information to the target
terminal, wherein the indication information comprises: an
interference presence Identification (ID); a modulation order of an
interference signal; and a Demodulation Reference Signal (DMRS)
port used by an interference terminal or a sequence number of a
DMRS port used by a target terminal.
27. (canceled)
28. The device according to claim 26, wherein the interference
presence ID and the modulation order of the interference signal are
indicated jointly.
29-32. (canceled)
33. The device according to claim 26, wherein the acquisition
module is further configured to determine, responsive to that a
data transmission mode is MUST, that a DMRS port used by the target
terminal is a first port and a DMRS port used by an interference
terminal is a second port according to a predetermined criterion,
and to send data based on the first port and the second port,
wherein the DMRS port used by the target terminal is one-to-one
mapping with the DMRS port used by the interference terminal.
34. The device according to claim 33, wherein the acquisition
module is further configured to, responsive to that there is one
DMRS port used by the target terminal and there is one DMRS port
used by the interference terminal, determine that a DMRS port
number used by the target terminal is 7 and a DMRS port number used
by the interference terminal is 8 according to the predetermined
criterion; or, determine that a DMRS port number used by the target
terminal is 8 and a DMRS port number used by the interference
terminal is 7 according to the predetermined criterion.
35-37. (canceled)
38. A computer storage medium, having a computer executable
instruction stored therein, the computer executable instruction
being used to perform the information transmission method according
to claim 1.
39. A computer storage medium, having a computer executable
instruction stored therein, the computer executable instruction
being used to perform the information transmission method according
to claim 20.
40. An information transmission device, comprising: a processor and
a memory configured to store a computer program runnable on the
processor, wherein the processor is configured to, when running the
computer program, perform the information transmission method
according to claim 1.
41. An information transmission device, comprising: a processor and
a memory configured to store a computer program runnable on the
processor, wherein the processor is configured to, when running the
computer program, perform the information transmission method
according to claim 20.
42. The method of claim 1, wherein overhead of the indication
information is 4 bit, including 2 bit for the modulation order and
2 bit for joint coding of the interference presence ID and the DMRS
port of the interference terminal.
43. The method of claim 20, wherein acquiring the DMRS port used by
the interference terminal according to the DMRS port used by the
target terminal comprises: responsive to that there is one DMRS
port used by the target terminal and there is one DMRS port used by
the interference terminal, the DMRS port used by the target
terminal is 7 and the DMRS port used by the interference terminal
is 8, or the DMRS port used by the target terminal is 8 and the
DMRS port used by the interference terminal is 7.
44. The device according to claim 26, wherein when there is one
layer of interference signal data, overhead of the indication
information is 4 bit, including 2 bit for the modulation order and
2 bit for joint coding of the interference presence ID and the DMRS
port of the interference terminal.
45. A computer storage medium, having a computer executable
instruction stored therein, the computer executable instruction
being used to perform the information transmission method according
to claim 2.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims benefit of Chinese Patent
Application No. 201610322443.1, filed on May 13, 2016, and Chinese
Patent Application No. 201610965396.2, filed on Nov. 4, 2016, the
contents of which are hereby incorporated by reference in their
entirety.
TECHNICAL FIELD
[0002] The disclosure relates to the technical field of wireless
communications, and in particular to an information transmission
method and device, and a storage medium.
BACKGROUND
[0003] A Non-Orthogonal Multiple Access (NOMA), one of the key
potential technologies of the 5th-Generation (5G) mobile
communication technology, has significant advantages in improving
spectral efficiency. The principle of NOMA is that a transmitting
side performs multi-user information superposition coding and a
receiving side uses Successive Interference Cancellation (SIC).
[0004] Multi-User Superposition Transmission (MUST) developed based
on the NOMA technology is an important part of 5G research of an
international standard organization 3GPP. In the research, it is
found that enabling a receiving terminal to obtain necessary known
information as much as possible is critical for the receiving
terminal to cancel interference and improve the correct
demodulation rate. However, the existing Physical Downlink Control
Channel (PDCCH) control signaling cannot effectively indicate MUST
parameters, which brings difficulties to the performance
improvement of a MUST system.
[0005] Therefore, it is urgent to provide an information
transmission scheme that enables a receiving terminal to acquire
information required for interference cancellation and improve the
interference cancellation performance of a MUST system.
SUMMARY
[0006] In view of this, embodiments of the disclosure are directed
to an information transmission method and device, and a storage
medium, which at least solve the problems in the existing art, and
enable a target terminal to receive information required for
interference cancellation with less overhead. The interference
cancellation performance of a MUST system is effectively improved
while maintaining little influence on the existing Long Term
Evolution (LTE) signaling.
[0007] The technical solution of the embodiments of the disclosure
is implemented as follows.
[0008] An embodiment of the disclosure provides an information
transmission method. The method includes that: [0009] indication
information for a target terminal is acquired; and [0010] the
indication information is sent to the target terminal to enable the
target terminal to cancel interference based on the indication
information during data reception of multi-user superposition.
[0011] In the above solution, the indication information may
include at least one of the following: [0012] a data transmission
mode, a Demodulation Reference Signal (DMRS) port used by an
interference terminal, a rank used by an interference signal,
precoding information used by the interference signal, Physical
Resource Block (PRB) granularity used in MUST, layer quantity of
target signal data, and a sequence number of a layer where the
interfered target signal data is located.
[0013] In the above solution, the indication information may
include the following information: [0014] an interference presence
Identification (ID); a modulation order of an interference signal;
and joint coding domain information of a port, a scrambling ID, and
layer quantity.
[0015] In the above solution, the port may be a DMRS port used by
an interference terminal, the scrambling ID may be a scrambling ID
used by an interference signal, and layer quantity may be layer
quantity of an interference signal data.
[0016] In the above solution, the interference presence ID and the
modulation order of the interference signal may be indicated by
joint coding.
[0017] In the above solution, the interference presence ID, the
port, the scrambling ID and layer quantity may be indicated by
joint coding.
[0018] In the above solution, DMRS port information of the target
terminal and DMRS port information of the interference terminal may
be jointly indicated by one signaling, or, DMRS port information of
the target terminal may be indicated by one signaling, and DMRS
port information of the interference terminal may be indicated by
one signaling.
[0019] In the above solution, layer quantity of the target signal
data may be 1, and layer quantity of the interference signal data
may be 1.
[0020] In the above solution, in a case that DMRS ports of the
target terminal and the interference terminal are different,
scrambling IDs of the target terminal and the interference terminal
may be set to be the same or different.
[0021] In the above solution, a set is predefined, and an element
of the set may be a Physical Downlink Shared Channel (PDSCH) power
parameter. The PDSCH power parameter may be a first type of PDSCH
power parameter or a second type of PDSCH power parameter. Downlink
Control Information (DCI) may be used to indicate that the first
type of PDSCH power parameter or the second type of PDSCH power
parameter is selected, and a transmitting power may be determined
according to the PDSCH power parameter.
[0022] In the above solution, the PDSCH power parameter may
indicate a power of a synthesized symbol or a power of a component
symbol of the synthesized symbol.
[0023] In the above solution, a calculation mode may be indicated
by DCI, a PDSCH power parameter may be calculated according to the
indicated calculation mode, and a transmitting power may be
determined according to the calculated PDSCH power parameter.
[0024] A domain may be defined in the DCI and the overhead is 1
bit; when a value is 0, the PDSCH power parameter is obtained by
using a first calculation mode; and when the value is 1, the PDSCH
power parameter is obtained by using a second calculation mode.
[0025] The value of the PDSCH power parameter may be -6 dB, -3 dB,
0 dB, 1 dB, 2 dB, 3 dB.
[0026] In the above solution, the calculation mode may include: a
first type of calculation mode which refers to obtaining the PDSCH
power parameter based on a PDSCH power where a synthesized symbol
is located; and a second type of calculation mode which refers to
obtaining the PDSCH power parameter based on a power of a component
symbol of a synthesized symbol.
[0027] In the above solution, the precoding information used by the
interference signal may be a Precoding Matrix Indicator (PMI) used
by the interference signal, or a storage sequence number of the PMI
used by the interference signal; the PMI used by the interference
signal may be a non-negative integer; and the storage sequence
number of the PMI used by the interference signal may be a
non-negative integer.
[0028] In the above solution, the indication information may
include the storage sequence number of the PMI used by the
interference signal.
[0029] Correspondingly, the operation of acquiring the indication
information for the target terminal may include the operations as
follows: [0030] a PMI used by the target signal, a rank used by the
target signal, the PMI used by the interference signal, a rank used
by the interference signal, and a first information comparison
table used by the interference signal are acquired; [0031] the
first information comparison table is searched for based on the PMI
used by the target signal, the rank used by the target signal, the
PMI used by the interference signal and the rank used by the
interference signal, so as to obtain the storage sequence number of
the PMI used by the interference signal.
[0032] In the above solution, the data transmission mode may
include: a MUST mode and a non-MUST mode.
[0033] In the above solution, the data transmission mode may be the
MUST mode.
[0034] Correspondingly, the PRB granularity used by the MUST may
include three types: full bandwidth, predefined sub-band, and
custom PRB granularity.
[0035] In the above solution, the method further may include that:
[0036] when the data transmission mode is MUST, it is determined
that the DMRS port used by the target terminal is a first port and
the DMRS port used by the interference terminal is a second port
according to a predetermined criterion, and thus data is sent based
on the first port and the second port.
[0037] The DMRS port used by the target terminal may be one-to-one
mapping with the DMRS port used by the interference terminal.
[0038] In the above solution, determining that the DMRS port used
by the target terminal is a first port and the DMRS port used by
the interference terminal is a second port according to a
predetermined criterion may include that: [0039] when there is one
DMRS port used by the target terminal and there is one DMRS port
used by the interference terminal, [0040] it is determined that the
DMRS port number used by the target terminal is 7 and the DMRS port
number used by the interference terminal is 8 according to a
predetermined criterion; [0041] or, it is determined that the DMRS
port number used by the target terminal is 7 and the DMRS port
number used by the interference terminal is 9 according to a
predetermined criterion; [0042] or, it is determined that the DMRS
port number used by the target terminal is 7 and the DMRS port
number used by the interference terminal is 10 according to a
predetermined criterion; [0043] or, it is determined that the DMRS
port number used by the target terminal is 8 and the DMRS port
number used by the interference terminal is 7 according to a
predetermined criterion; [0044] or, it is determined that the DMRS
port number used by the target terminal is 8 and the DMRS port
number used by the interference terminal is 9 according to a
predetermined criterion; [0045] or, it is determined that the DMRS
port number used by the target terminal is 8 and the DMRS port
number used by the interference terminal is 10 according to a
predetermined criterion; [0046] when there are two DMRS ports used
by the target terminal and there are two DMRS ports used by the
interference terminal, [0047] it is determined that the sequence
numbers of the DMRS ports used by the target terminal are 7 and 8
and the sequence numbers of the DMRS ports used by the interference
terminal is 7 and 8 according to a predetermined criterion; [0048]
or, it is determined that the sequence numbers of the DMRS ports
used by the target terminal are 7 and 8 and the sequence numbers of
the DMRS ports used by the interference terminal are 9 and 10
according to a predetermined criterion; [0049] or, it is determined
that the sequence numbers of the DMRS ports used by the target
terminal are 7 and 9 and the sequence numbers of the DMRS ports
used by the interference terminal are 8 and 10 according to a
predetermined criterion; [0050] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
8 and 10 and the sequence numbers of the DMRS ports used by the
interference terminal are 7 and 9 according to a predetermined
criterion; [0051] when there are two DMRS ports used by the target
terminal and there is one DMRS port used by the interference
terminal, [0052] it is determined that the sequence numbers of the
DMRS ports used by the target terminal are 7 and 8 and the DMRS
port number used by the interference terminal is 7 according to a
predetermined criterion; [0053] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8 and the DMRS port number used by the interference terminal
is 8 according to a predetermined criterion; [0054] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 7 and 8 and the DMRS port number used by the
interference terminal is 9 according to a predetermined criterion;
[0055] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 7 and 8 and the DMRS port
number used by the interference terminal is 10 according to a
predetermined criterion; [0056] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 9 and the DMRS port number used by the interference terminal
is 8 according to a predetermined criterion; [0057] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 7 and 9 and the DMRS port number used by the
interference terminal is 10 according to a predetermined criterion;
[0058] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 8 and 10 and the DMRS port
number used by the interference terminal is 7 according to a
predetermined criterion; [0059] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
8 and 10 and the DMRS port number used by the interference terminal
is 9 according to a predetermined criterion; [0060] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 9 and 10 and the DMRS port number used by the
interference terminal is 7 according to a predetermined criterion;
[0061] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 9 and 10 and the DMRS port
number used by the interference terminal is 8 according to a
predetermined criterion; [0062] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
9 and 10 and the DMRS port number used by the interference terminal
is 9 according to a predetermined criterion; [0063] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 9 and 10 and the DMRS port number used by the
interference terminal is 10 according to a predetermined
criterion.
[0064] An embodiment of the disclosure also provides an information
transmission method. The method includes that: [0065] indication
information sent by a base station is received. [0066] interference
is cancelled based on the indication information during data
reception of multi-user superposition.
[0067] In the above solution, a receiving side may obtain a PDSCH
power parameter according to DCI, and demodulate received data
according to the obtained PDSCH power parameter.
[0068] In the above solution, the receiving side may obtain a
calculation mode according to DCI to further obtain a PDSCH power
parameter according to the calculation mode, and demodulate
received data according to the calculated PDSCH power
parameter.
[0069] In the above solution, the indication information may
include a storage sequence number of a PMI used by an interference
signal.
[0070] Correspondingly, after indication information sent by a base
station is received, the method further includes that: [0071] a PMI
used by a target signal, a rank used by the target signal and a
first information comparison table used by the target signal are
acquired; and [0072] the first information comparison table is
searched for based on a storage sequence number of a PMI used by
the interference signal, the PMI used by the target signal and the
rank used by the target signal, so as to obtain the PMI used by the
interference signal.
[0073] In the above solution, the first information comparison
table may represent a correspondence between the PMI used by the
target signal and the PMI used by the interference signal, the
correspondence being determined according to an angle between a
codeword indicated by the PMI used by the target signal and a
codeword indicated by the PMI used by the interference signal.
[0074] In the above solution, the indication information may
include a data transmission mode and a DMRS port used by a target
terminal, wherein the data transmission mode is a MUST mode.
[0075] Correspondingly, after the indication information sent by
the base station is received, the method further includes that:
[0076] the DMRS port number used by the target terminal is acquired
from the indication information, and a sequence number of a DMRS
port used by an interference terminal is obtained according to the
DMRS port number used by the target terminal.
[0077] An embodiment of the disclosure also provides an information
transmission device. The device is located on a base station, and
includes: an acquisition module and a sending module.
[0078] The acquisition module may be configured to acquire
indication information for a target terminal.
[0079] The sending module may be configured to send the indication
information to the target terminal to enable the target terminal to
cancel interference based on the indication information during data
reception of multi-user superposition.
[0080] In the above solution, the indication information includes
at least one of the following: [0081] a data transmission mode, a
DMRS port used by an interference terminal, a rank used by an
interference signal, precoding information used by the interference
signal, PRB granularity used in MUST, layer quantity of target
signal data, and a sequence number of a layer where the interfered
target signal data is located.
[0082] In the above solution, the indication information may
include the following information: [0083] an interference presence
ID; a modulation order of an interference signal; and joint coding
domain information of a port, a scrambling ID, and layer
quantity.
[0084] In the above solution, the port may be a DMRS port used by
an interference terminal, the scrambling ID may be a scrambling ID
used by an interference signal, and layer quantity may be layer
quantity of an interference signal data.
[0085] In the above solution, the interference presence ID and the
modulation order used by the interference signal may be indicated
by joint coding.
[0086] In the above solution, the interference presence ID, the
port, the scrambling ID and layer quantity may be indicated by
joint coding.
[0087] In the above solution, layer quantity of the target signal
data may be 1, and layer quantity of the interference signal data
may be 1.
[0088] In the above solution, in a case that DMRS ports of the
target terminal and the interference terminal are different,
scrambling IDs of the target terminal and the interference terminal
may be set to be the same.
[0089] In the above solution, the precoding information used by the
interference signal may be: a PMI used by the interference signal,
or a storage sequence number of the PMI used by the interference
signal; the PMI used by the interference signal is a non-negative
integer; and the storage sequence number of the PMI used by the
interference signal is a non-negative integer.
[0090] In the above solution, a set may be predefined, and an
element of the set may be a PDSCH power parameter. The PDSCH power
parameter may be a first type of PDSCH power parameter or a second
type of PDSCH power parameter. DCI may be used to indicate that the
first type of PDSCH power parameter or the second type of PDSCH
power parameter is selected, and transmitting power is determined
according to the PDSCH power parameter.
[0091] In the above solution, the first type of PDSCH power
parameter may be obtained based on a PDSCH power where a
synthesized symbol is located, and the second type of PDSCH power
parameter may be obtained based on a power of a component symbol of
the synthesized symbol.
[0092] In the above solution, a set may be predefined, and an
element of the set may be a PDSCH power parameter. A calculation
mode is indicated by DCI, a PDSCH power parameter is calculated
according to the indicated calculation mode, and a transmitting
power is determined according to the calculated PDSCH power
parameter.
[0093] A domain may be defined in the DCI, the overhead is 1 bit;
when the value is 0, the PDSCH power parameter is obtained by using
a first calculation mode, and when the value is 1, the PDSCH power
parameter is obtained by using a second calculation mode.
[0094] In the above solution, the calculation mode may include: a
first type of calculation mode which is obtaining the PDSCH power
parameter based on a PDSCH power where the synthesized symbol is
located; and a second type of calculation modes which is obtaining
the PDSCH power parameter based on a power of a component symbol of
the synthesized symbol.
[0095] In the above solution, the precoding information used by the
interference signal may be: a PMI used by the interference signal,
or a storage sequence number of the PMI used by the interference
signal; the PMI used by the interference signal is a non-negative
integer; and the storage sequence number of the PMI used by the
interference signal is a non-negative integer.
[0096] In the above solution, the indication information may
include a storage sequence number of a PMI used by the interference
signal.
[0097] Correspondingly, the acquisition module may be further
configured to: [0098] acquire a PMI used by the target signal, a
rank used by the target signal, the PMI used by the interference
signal, a rank used by the interference signal, and a first
information comparison table used by the interference signal; and
[0099] search for the first information comparison table based on
the PMI used by the target signal, the rank used by the target
signal, the PMI used by the interference signal and the rank used
by the interference signal, so as to obtain the storage sequence
number of the PMI used by the interference signal.
[0100] In the above solution, the acquisition module may be further
configured to determine, when the data transmission mode is MUST,
that the DMRS port used by the target terminal is a first port and
the DMRS port used by the interference terminal is a second port
according to a predetermined criterion, and thus send data based on
the first port and the second port.
[0101] The DMRS port used by the target terminal may be one-to-one
mapping the DMRS port used by the interference terminal.
[0102] In the above solution, the acquisition module may be further
configured to: [0103] when there is one DMRS port used by the
target terminal and there is one DMRS port used by the interference
terminal, [0104] determine that the DMRS port number used by the
target terminal is 7 and the DMRS port number used by the
interference terminal is 8 according to a predetermined criterion;
[0105] or, determine that the DMRS port number used by the target
terminal is 7 and the DMRS port number used by the interference
terminal is 9 according to a predetermined criterion; [0106] or,
determine that the DMRS port number used by the target terminal is
7 and the DMRS port number used by the interference terminal is 10
according to a predetermined criterion; [0107] or, determine that
the DMRS port number used by the target terminal is 8 and the DMRS
port number used by the interference terminal is 7 according to a
predetermined criterion; [0108] or, determine that the DMRS port
number used by the target terminal is 8 and the DMRS port number
used by the interference terminal is 9 according to a predetermined
criterion; [0109] or, determine that the DMRS port number used by
the target terminal is 8 and the DMRS port number used by the
interference terminal is 10 according to a predetermined criterion;
[0110] when there are two DMRS ports used by the target terminal
and there are two DMRS ports used by the interference terminal,
[0111] determine that the sequence numbers of the DMRS ports used
by the target terminal are 7 and 8 and the sequence numbers of the
DMRS ports used by the interference terminal is 7 and 8 according
to a predetermined criterion; [0112] or, determine that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8 and the sequence numbers of the DMRS ports used by the
interference terminal are 9 and 10 according to a predetermined
criterion; [0113] or, determine that the sequence numbers of the
DMRS ports used by the target terminal are 7 and 9 and the sequence
numbers of the DMRS ports used by the interference terminal are 8
and 10 according to a predetermined criterion; [0114] or, determine
that the sequence numbers of the DMRS ports used by the target
terminal are 8 and 10 and the sequence numbers of the DMRS ports
used by the interference terminal are 7 and 9 according to a
predetermined criterion; [0115] when there are two DMRS ports used
by the target terminal and there is one DMRS port used by the
interference terminal, [0116] determine that the sequence numbers
of the DMRS ports used by the target terminal are 7 and 8 and the
DMRS port number used by the interference terminal is 7 according
to a predetermined criterion; [0117] or, determine that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8 and the DMRS port number used by the interference terminal
is 8 according to a predetermined criterion; [0118] or, determine
that the sequence numbers of the DMRS ports used by the target
terminal are 7 and 8 and the DMRS port number used by the
interference terminal is 9 according to a predetermined criterion;
[0119] or, determine that the sequence numbers of the DMRS ports
used by the target terminal are 7 and 8 and the DMRS port number
used by the interference terminal is 10 according to a
predetermined criterion; [0120] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 7 and 9
and the DMRS port number used by the interference terminal is 8
according to a predetermined criterion; [0121] or, determine that
the sequence numbers of the DMRS ports used by the target terminal
are 7 and 9 and the DMRS port number used by the interference
terminal is 10 according to a predetermined criterion; [0122] or,
determine that the sequence numbers of the DMRS ports used by the
target terminal are 8 and 10 and the DMRS port number used by the
interference terminal is 7 according to a predetermined criterion;
[0123] or, determine that the sequence numbers of the DMRS ports
used by the target terminal are 8 and 10 and the DMRS port number
used by the interference terminal is 9 according to a predetermined
criterion; [0124] or, determine that the sequence numbers of the
DMRS ports used by the target terminal are 9 and 10 and the DMRS
port number used by the interference terminal is 7 according to a
predetermined criterion; [0125] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 9 and 10
and the DMRS port number used by the interference terminal is 8
according to a predetermined criterion; [0126] or, determine that
the sequence numbers of the DMRS ports used by the target terminal
are 9 and 10 and the DMRS port number used by the interference
terminal is 9 according to a predetermined criterion; [0127] or,
determine that the sequence numbers of the DMRS ports used by the
target terminal are 9 and 10 and the DMRS port number used by the
interference terminal is 10 according to a predetermined
criterion.
[0128] An embodiment of the disclosure also provides an information
transmission device. The device is located on a target terminal and
includes: a receiving module and a processing module.
[0129] The receiving module may be configured to receive indication
information sent by a base station.
[0130] The processing module may be configured to perform
interference cancellation based on the indication information
during data reception of multi-user superposition.
[0131] In the above solution, the indication information may
include a storage sequence number of a PMI used by an interference
signal.
[0132] Correspondingly, the processing module may be further
configured to: [0133] acquire a PMI used by a target signal, a rank
used by the target signal, a rank used by the target signal, and a
first information comparison table used by the target signal; and
[0134] search for the first information comparison table based on a
storage sequence number of a PMI used by the interference signal,
the rank used by the target signal, the PMI used by the target
signal and the rank used by the target signal, so as to obtain the
PMI used by the interference signal.
[0135] In the above solution, the indication information may
include: a data transmission mode and a DMRS port used by a target
terminal, wherein the data transmission mode is a MUST mode.
[0136] Correspondingly, the processing module may be further
configured to acquire the DMRS port number used by the target
terminal from the indication information, and obtain a DMRS port
used by an interference terminal according to the DMRS port used by
the target terminal.
[0137] An embodiment of the disclosure also provides a computer
storage medium having a computer program stored therein. The
computer program is configured to perform the information
transmission method according to the embodiments of the
disclosure.
[0138] According to the information transmission methods and
devices and the storage medium provided in the embodiments of the
disclosure, a base station acquires indication information for a
target terminal, and sends the indication information to the target
terminal to enable the target terminal to cancel interference based
on the indication information during data reception of multi-user
superposition. Thus, the target terminal is enabled to receive
information required for interference cancellation with less
overhead. The interference cancellation performance of a MUST
system is effectively improved while maintaining little influence
on the existing LTE signaling.
BRIEF DESCRIPTION OF DRAWINGS
[0139] FIG. 1 is a first schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0140] FIG. 2 is a second schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0141] FIG. 3 is a third schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0142] FIG. 4 is a fourth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0143] FIG. 5 is a fifth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0144] FIG. 6 is a sixth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0145] FIG. 7 is a seventh schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0146] FIG. 8 is an eighth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0147] FIG. 9 is a ninth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0148] FIG. 10 is a tenth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0149] FIG. 11 is an eleventh schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0150] FIG. 12 is a twelfth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0151] FIG. 13 is a thirteenth schematic flowchart of an
information transmission method according to an embodiment of the
disclosure.
[0152] FIG. 14 is a fourteenth schematic flowchart of an
information transmission method according to an embodiment of the
disclosure.
[0153] FIG. 15 is a fifteenth schematic flowchart of an information
transmission method according to an embodiment of the
disclosure.
[0154] FIG. 16 is a schematic diagram of PRB granularity used by
MUST according to an embodiment of the disclosure.
[0155] FIG. 17 is a seventeenth schematic flowchart of an
information transmission method according to an embodiment of the
disclosure.
[0156] FIG. 18 is a first composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
[0157] FIG. 19 is a second composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
[0158] FIG. 20 is a third composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
[0159] FIG. 21 is a fourth composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
[0160] FIG. 22 is a fifth composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
[0161] FIG. 23 is a sixth composition structure diagram of an
information transmission device according to an embodiment of the
disclosure.
DETAILED DESCRIPTION
[0162] The disclosure will be described in detail below with
reference to the drawings in conjunction with the embodiments. It
is to be noted that embodiments in the present application and
characteristics in the embodiments may be combined under the
condition of no conflicts.
[0163] Embodiment 1
[0164] FIG. 1 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 1, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0165] In the operation 101, indication information for a target
terminal is acquired.
[0166] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0167] The indication information may separately indicate a certain
piece of information by means of independent coding or joint
coding, or jointly indicate multiple pieces of information by means
of independent coding and joint coding, and the indication
information includes at least one of the following: [0168] a data
transmission mode, a DMRS port used by an interference terminal, a
rank used by an interference signal, precoding information used by
the interference signal, PRB granularity used by MUST, layer
quantity of target signal data, and a sequence number of a layer
where the interfered target signal data is located.
[0169] The precoding information used by the interference signal
is: a PMI used by the interference signal, or a storage sequence
number of the PMI used by the interference signal; the PMI used by
the interference signal is a non-negative integer; and the storage
sequence number of the PMI used by the interference signal is a
non-negative integer.
[0170] In practical applications, layer quantity of the target
signal data is less than or equal to k; preferably, k is 2 or 4;
for example, k is 2, that is, the number of layers of the target
signal data is 2, and correspondingly, the sequence number of a
layer where the interfered target signal data is located may be a
first layer, a second layer, or the first layer and the second
layer.
[0171] In practical applications, the indication information may
only indicate whether the data transmission mode from the base
station to the target terminal is a MUST mode.
[0172] The indication information may also indicate layer quantity
of the target signal data and the sequence number of the layer
where the interfered target signal data is located, that is, the
layer quantity of data of a target signal, and which layers of data
are interfered by other signals.
[0173] The indication information may also indicate that the data
transmission mode from the base station to the target terminal is
the MUST mode, and indicate layer quantity of the target signal
data, and the sequence number of the layer where the interfered
target signal data is located.
[0174] The indication information may also indicate a (used) DMRS
port used by the target terminal, layer quantity of the target
signal data, and the sequence number of the layer where the
interfered target signal data is located.
[0175] The indication information may also indicate only one of the
following three types of information: a DMRS port used by an
interference terminal, a PMI used by an interference signal, and a
storage sequence number of the PMI used by the interference
signal.
[0176] When the indication information includes a storage sequence
number of the PMI used by the interference signal, the operation
that the base station acquires a storage sequence number of the PMI
used by the interference signal for the target terminal includes
the operations as follows: [0177] a PMI used by a target signal, a
rank used by the target signal, a PMI used by an interference
signal, a rank used by the interference signal, and a first
information comparison table used by the interference signal are
acquired; [0178] the first information comparison table is searched
for based on the PMI used by the target signal, the rank used by
the target signal, the PMI used by the interference signal and the
rank used by the interference signal, so as to obtain a storage
sequence number of the PMI used by the interference signal.
[0179] Here, the rank used by the interference signal is the same
as the rank used by the target signal.
[0180] The first information comparison table is a table of
comparison between the PMI used by the interference signal and the
storage sequence number of the used PMI.
[0181] The data transmission mode included in the execution
information may be a MUST mode or a non-MUST mode.
[0182] When the data transmission mode is a MUST mode, the PRB
granularity used by the MUST may be: a Reference Block Group (RBG),
or a sub-band, or a PRB Group configured by an RRC of the base
station.
[0183] The PRB granularity is dynamically indicated by DCI
signaling, which may be full bandwidth, or system predetermined
sub-band, or custom PRB granularity.
[0184] In an embodiment, when the target terminal adopts
transmission diversity, the interference terminal also adopts
transmission diversity.
[0185] In an embodiment, a mapping relationship between precoding
used by the target signal and precoding corresponding to the
interference signal specifically may be a packet used by a
Cell-specific Reference Signals (CRS) transmission mode. A grouping
principle is, for example, that the beam angle is less than or
equal to X.
[0186] In an embodiment, the method further includes that: when the
data transmission mode is MUST, it is determined that the DMRS port
used by the target terminal is a first port and the DMRS port used
by the interference terminal is a second port according to a
predetermined criterion, and data is sent based on the first port
and the second port, wherein the DMRS port used by the target
terminal is one-to-one mapping with the DMRS port used by the
interference terminal.
[0187] In an embodiment, when there is one target terminal and
there is one interference terminal, and when there is one DMRS port
used by the target terminal and there is one DMRS port used by the
interference terminal, it is determined that the DMRS port number
used by the target terminal is 7 and the DMRS port number used by
the interference terminal is 8 according to a predetermined
criterion; [0188] or, it is determined that the DMRS port number
used by the target terminal is 7 and the DMRS port number used by
the interference terminal is 9 according to a predetermined
criterion; [0189] or, it is determined that the DMRS port number
used by the target terminal is 7 and the DMRS port number used by
the interference terminal is 10 according to a predetermined
criterion; [0190] or, it is determined that the DMRS port number
used by the target terminal is 8 and the DMRS port number used by
the interference terminal is 7 according to a predetermined
criterion; [0191] or, it is determined that the DMRS port number
used by the target terminal is 8 and the DMRS port number used by
the interference terminal is 9 according to a predetermined
criterion; [0192] or, it is determined that the DMRS port number
used by the target terminal is 8 and the DMRS port number used by
the interference terminal is 10 according to a predetermined
criterion.
[0193] When there are two DMRS ports used by the target terminal
and there are two DMRS ports used by the interference terminal, it
is determined that the sequence numbers of the DMRS ports used by
the target terminal are 7 and 8 and the sequence numbers of the
DMRS ports used by the interference terminal is 7 and 8 according
to a predetermined criterion; [0194] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8 and the sequence numbers of the DMRS ports used by the
interference terminal are 9 and 10 according to a predetermined
criterion; [0195] or, it is determined that the sequence numbers of
the DMRS ports used by the target terminal are 7 and 9 and the
sequence numbers of the DMRS ports used by the interference
terminal are 8 and 10 according to a predetermined criterion;
[0196] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 8 and 10 and the sequence
numbers of the DMRS ports used by the interference terminal are 7
and 9 according to a predetermined criterion.
[0197] Here, it is to be noted that there are two cases in which
the target terminal and the interference terminal use two DMRS
ports: one is that there is one target terminal and there is one
interference terminal, and the target terminal and the interference
terminal use two ports respectively; the other case is that there
is one target terminal and there are two interference terminals
such as a first interference terminal and a second interference
terminal. For the case where there are two interference terminals,
each interference terminal has one port, and the sequence number of
the used DMRS port is one of the sequence numbers of two DMRS ports
available for the interference terminal, which are as follows
specifically: [0198] according to a predetermined criterion, the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8, the DMRS port number used by the first interference
terminal is 7, and the DMRS port number used by the second
interference terminal is 8; [0199] or, according to a predetermined
criterion, the sequence numbers of the DMRS ports used by the
target terminal are 7 and 8, the DMRS port number port used by the
first interference terminal is 9, and the DMRS port number used by
the second interference terminal is 10; [0200] or, according to a
predetermined criterion, the sequence numbers of the DMRS ports
used by the target terminal are 9 and 10, the DMRS port number used
by the first interference terminal is 7, and the DMRS port number
used by the second interference terminal is 8; [0201] or, according
to a predetermined criterion, the sequence numbers of the DMRS
ports used by the target terminal are 7 and 9, the DMRS port number
used by the first interference terminal is 8, and the DMRS port
number used by the second interference terminal is 10; [0202] or,
according to a predetermined criterion, the sequence numbers of the
ports used by the target terminal are 8 and 10, the DMRS port
number used by the first interference terminal is 7, and the DMRS
port number used by the second interference terminal is 9;
[0203] When there is one target terminal and there is one
interference terminal, and when there are two DMRS ports used by
the target terminal and there is one DMRS port used by the
interference terminal, [0204] it is determined that the sequence
numbers of the DMRS ports used by the target terminal are 7 and 8
and the DMRS port number used by the interference terminal is 7
according to a predetermined criterion; [0205] or, it is determined
that the sequence numbers of the DMRS ports used by the target
terminal are 7 and 8 and the DMRS port number used by the
interference terminal is 8 according to a predetermined criterion;
[0206] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 7 and 8 and the DMRS port
number used by the interference terminal is 9 according to a
predetermined criterion; [0207] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
7 and 8 and the DMRS port number used by the interference terminal
is 10 according to a predetermined criterion; [0208] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 7 and 9 and the DMRS port number used by the
interference terminal is 8 according to a predetermined criterion;
[0209] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 7 and 9 and the DMRS port
number used by the interference terminal is 10 according to a
predetermined criterion; [0210] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
8 and 10 and the DMRS port number used by the interference terminal
is 7 according to a predetermined criterion; [0211] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 8 and 10 and the DMRS port number used by the
interference terminal is 9 according to a predetermined criterion;
[0212] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 9 and 10 and the DMRS port
number used by the interference terminal is 7 according to a
predetermined criterion; [0213] or, it is determined that the
sequence numbers of the DMRS ports used by the target terminal are
9 and 10 and the DMRS port number used by the interference terminal
is 8 according to a predetermined criterion; [0214] or, it is
determined that the sequence numbers of the DMRS ports used by the
target terminal are 9 and 10 and the DMRS port number used by the
interference terminal is 9 according to a predetermined criterion;
[0215] or, it is determined that the sequence numbers of the DMRS
ports used by the target terminal are 9 and 10 and the DMRS port
number used by the interference terminal is 10 according to a
predetermined criterion.
[0216] Here, it is to be noted that when the base station
determines the DMRS port used by the target terminal and the DMRS
port used by the interference terminal, and sends data based on the
determined DMRS ports, even if the corresponding indication
information does not include the DMRS port used by the interference
terminal, the target terminal can also acquire it according to the
predetermined criterion and the DMRS port used by itself.
[0217] In an embodiment, when the data transmission mode is a
non-MUST mode (normal mode), the remaining MUST mode bits are used
to indicate which PRBs in the normal mode are of the MUST mode; and
the MUST mode is a predefined mode.
[0218] When the data transmission mode is the MUST mode,
information used by the MUST mode (at least one of an interference
layer, precoding, a port, power, modulation, granularity, and a
predefined PRB) is an RRC configuration set, which is configured by
dynamical selection through DCI signaling. For example, 2 bits are
added in all DCIs, 00 means a normal transmission mode, 01 means a
first MUST mode, 10 means a second MUST mode, and 11 means a third
MUST mode, wherein first, second and third MUST mode configuration
parameters are RRC configurations.
[0219] In operation 102, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0220] By applying the above embodiment of the disclosure, a base
station sends information required for a target terminal to cancel
interference to a target terminal through indication information,
so that the target terminal cancels interference information based
on the indication information during data reception of multi-user
superposition. Based on actual characteristics of a MUST
technology, the redundant information is removed as much as
possible to reduce the transmission information overhead. The
interference cancellation performance of a MUST system is improved
by transmitting downlink MUST parameter information while
maintaining little influence on the existing LTE signaling.
[0221] Embodiment 2
[0222] FIG. 2 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 2, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0223] At operation 201, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0224] The indication information is: an interference presence ID,
a modulation order used by an interference signal, a DMRS port used
by an interference terminal, a scrambling ID used by the
interference signal, and layer quantity of interference signal
data.
[0225] Layer quantity of target signal data is 1. Layer quantity of
interference signal data is 1.
[0226] The overhead of the indication information is 3 bits in
total, wherein the overhead of joint coding of the interference
presence ID and a modulation mode is 2 bit, as shown in Table 2.1.
The overhead of joint coding of layer quantity of the interference
signal data, the scrambling ID used by the interference signal and
the DMRS port used by the interference terminal is 1 bit.
TABLE-US-00001 TABLE 2.1 Joint coding of interference presence ID
and modulation order (overhead is 2 bit) Modulation order used by
interference signal Value Message 0 Interference absence 1 QPSK 2
16QAM 3 64QAM
TABLE-US-00002 TABLE 2.2 Joint coding of the sequence number of
DMRS port of interference terminal, the scrambling ID and the
number of layers (overhead is 1 bit) Target terminal Interference
terminal Value Message Value Message 0 1 layer, port 7, nSCID = 0 0
1 layer, port 7, nSCID = 1 (OCC = 2 or OCC = 4) 1 1 layer, port 8,
nSCID = 0 1 1 layer, port 7, nSCID = 1 0 1 layer, port 7, nSCID = 0
(OCC = 2 or OCC = 4) 1 1 layer, port 8, nSCID = 1 2 1 layer, port
8, nSCID = 0 0 1 layer, port 7, nSCID = 0 (OCC = 2 or OCC = 4) 1 1
layer, port 8, nSCID = 1 3 1 layer, port 8, nSCID = 1 0 1 layer,
port 7, nSCID = 1 (OCC = 2 or OCC = 4) 1 1 layer, port 8, nSCID = 0
4 1 layer, port 11, nSCID = 0 0 1 layer, port 11, nSCID = 1 (OCC =
4) 1 1 layer, port 13, nSCID = 0 5 1 layer, port 11, nSCID = 1 0 1
layer, port 11, nSCID = 0 (OCC = 4) 1 1 layer, port 13, nSCID = 1 6
1 layer, port 13, nSCID = 0 0 1 layer, port 11, nSCID = 0 (OCC = 4)
1 1 layer, port 13, nSCID = 1 7 1 layer, port 13, nSCID = 1 0 1
layer, port 11, nSCID = 1 (OCC = 4) 1 1 layer, port 13, nSCID =
0
[0227] In Table 2.2, if the DMRS ports of the target terminal and
the interference terminal are the same, the SCIDs thereof are
different. If the DMRS ports of the target terminal and the
interference terminal are different, the SCIDs thereof are the
same. At operation 202, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0228] Embodiment 3
[0229] FIG. 3 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 3, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0230] At operation 301, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0231] The indication information is: an interference presence ID,
a DMRS port used by an interference terminal, and a modulation
order used by an interference signal. The layer quantity of data of
a target signal is 1. The layer quantity of data of an interference
signal is 1.
[0232] The overhead of the indication information is 4 bit in
total, wherein the overhead of the interference presence ID is 1
bit, the overhead of the modulation mode is 2 bit, and the overhead
of the DMRS port number is 1 bit, as shown in Tables 3.1 to
3.3.
TABLE-US-00003 TABLE 3.1 Interference presence of interference
terminal (overhead is 1 bit) Interference presence ID of
interference terminal Value Message 0 Interference absence 1
Interference presence
TABLE-US-00004 TABLE 3.2 Modulation mode of interference terminal
(overhead is 2 bit) Modulation mode of interference signal Value
Message 0 QPSK 1 16QAM 2 64QAM 3 Reserved
TABLE-US-00005 TABLE 3.3 Joint coding of layer quantity, Scrambling
ID (SCID) and sequence number of DMRS port of interference terminal
(overhead is 1 bit) Target terminal Interference terminal Value
Message Value Message 0 1 layer, port 7, n.sub.SCID = 0 0 1 layer,
port 7, n.sub.SCID = 1 (OCC = 2 or OCC = 4) 1 1 layer, port 8,
n.sub.SCID = 0 1 1 layer, port 7, n.sub.SCID = 1 0 1 layer, port 7,
n.sub.SCID = 0 (OCC = 2 or OCC = 4) 1 1 layer, port 8, n.sub.SCID =
1 2 1 layer, port 8, n.sub.SCID = 0 0 1 layer, port 7, n.sub.SCID =
0 (OCC = 2 or OCC = 4) 1 1 layer, port 8, n.sub.SCID = 1 3 1 layer,
port 8, n.sub.SCID = 1 0 1 layer, port 7, n.sub.SCID = 1 (OCC = 2
or OCC = 4) 1 1 layer, port 8, n.sub.SCID = 0 4 1 layer, port 11,
n.sub.SCID = 0 0 1 layer, port 11, n.sub.SCID = 1 (OCC = 4) 1 1
layer, port 13, n.sub.SCID = 0 5 1 layer, port 11, n.sub.SCID = 1 0
1 layer, port 11, n.sub.SCID = 0 (OCC = 4) 1 1 layer, port 13,
n.sub.SCID = 1 6 1 layer, port 13, n.sub.SCID = 0 0 1 layer, port
11, n.sub.SCID = 0 (OCC = 4) 1 1 layer, port 13, n.sub.SCID = 1 7 1
layer, port 13, n.sub.SCID = 1 0 1 layer, port 11, n.sub.SCID = 1
(OCC = 4) 1 1 layer, port 13, n.sub.SCID = 0
[0233] In Table 3.2, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different. In a case that the
sequence numbers of the DMRS ports of the target terminal and the
interference terminal are different, the SCIDs thereof are the
same.
[0234] At operation 302, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0235] Embodiment 4
[0236] FIG. 4 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 4, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows. At the operation
401, indication information for a target terminal is acquired.
[0237] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0238] The indication information is: an interference presence ID,
a DMRS port used by an interference terminal, and a modulation
order used by an interference signal.
[0239] The layer quantity of data of a target signal is 1. The
layer quantity of data of an interference signal is 1.
[0240] The overhead of the indication information is 4 bit in
total, wherein the overhead of the modulation mode is 2 bit, the
overhead of joint coding of the interference presence ID and the
DMRS port number of the interference terminal is 2 bit. Mobile
Origination Call (MO) of interference terminal is taken as an
example, as shown in Tables 4.1 to 4.2 below.
TABLE-US-00006 TABLE 4.1 Modulation mode of interference terminal
(overhead is 2 bit) MO of interference terminal Value Message 0
QPSK 1 16QAM 2 64QAM 3 Reserved
TABLE-US-00007 TABLE 4.2 Joint coding of interference presence ID,
sequence number of DMRS port of interference terminal, scrambling
ID and layer quantity (overhead is 2 bit) Target terminal
Interference terminal Value Message Value Message 0 1 layer, port
7, 0 Interference absence n.sub.SCID = 0 1 1 layer, port 7,
n.sub.SCID = 1 (OCC = 2 or OCC = 4) 2 1 layer, port 8, n.sub.SCID =
0 3 1 layer, port 8, n.sub.SCID = 1 1 1 layer, port 7, 0
Interference absence n.sub.SCID = 1 1 1 layer, port 7, n.sub.SCID =
0 (OCC = 2 or OCC = 4) 2 1 layer, port 8, n.sub.SCID = 0 3 1 layer,
port 8, n.sub.SCID = 1 2 1 layer, port 8, 0 Interference absence
n.sub.SCID = 0 1 1 layer, port 7, n.sub.SCID = 0 (OCC = 2 or OCC =
4) 2 1 layer, port 7, n.sub.SCID = 1 3 1 layer, port 8, n.sub.SCID
= 1 3 1 layer, port 8, 0 Interference absence n.sub.SCID = 1 1 1
layer, port 7, n.sub.SCID = 0 (OCC = 2 or OCC = 4) 2 1 layer, port
7, n.sub.SCID = 1 3 1 layer, port 8, n.sub.SCID = 0 4 1 layer, port
11, 0 Interference absence n.sub.SCID = 0 (OCC = 4) 1 1 layer, port
11, n.sub.SCID = 1 2 1 layer, port 13, n.sub.SCID = 0 3 1 layer,
port 13, n.sub.SCID = 1 5 1 layer, port 11, 0 Interference absence
n.sub.SCID = 1 (OCC = 4) 1 1 layer, port 11, n.sub.SCID = 0 2 1
layer, port 13, n.sub.SCID = 0 3 1 layer, port 13, n.sub.SCID = 1 6
1 layer, port 13, 0 Interference absence n.sub.SCID = 0 (OCC = 4) 1
1 layer, port 11, n.sub.SCID = 0 2 1 layer, port 11, n.sub.SCID = 1
3 1 layer, port 13, n.sub.SCID = 1 7 1 layer, port 13, 0
Interference absence n.sub.SCID = 1 (OCC = 4) 1 1 layer, port 11,
n.sub.SCID = 0 2 1 layer, port 11, n.sub.SCID = 1 3 1 layer, port
13, n.sub.SCID = 0
[0241] In Table 4.2, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different.
[0242] At operation 402, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0243] Embodiment 5
[0244] FIG. 5 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station.
[0245] As shown in FIG. 5, the information transmission method
according to an embodiment of the disclosure includes the
operations as follows.
[0246] At operation 501, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0247] The indication information is: an interference presence ID,
a DMRS port used by an interference terminal, and a modulation
order used by an interference signal.
[0248] The layer quantity of data of a target signal is 1 or 2. The
layer quantity of data of an interference signal is 1 or 2.
[0249] The overhead of the indication information is 4 bit in
total, wherein the overhead of joint coding of the interference
presence ID and the modulation order is 2 bit, and the overhead of
the DMRS port number is 2 bit, as shown in Tables 5.1 to 5.3.
TABLE-US-00008 TABLE 5.1 Joint coding of modulation order and
interference presence of interference terminal (overhead is 2 bit)
MO of interference terminal Value Message 0 Interference absence 1
QPSK 2 16QAM 3 64QAM
TABLE-US-00009 TABLE 5.2 Joint coding of sequence number of DMRS
port of interference terminal, scrambling ID and layer quantity
(rank of target terminal is 1) (overhead is 2 bit) Target terminal
Interference terminal Value Message Value Message 0 1 layer, port
7, n.sub.SCID = 0 0 1 layer, port 7, n.sub.SCID = 1 (OCC = 2 or OCC
= 4) 1 1 layer, port 8, n.sub.SCID = 0 2 1 layer, port 8,
n.sub.SCID = 1 3 2 layer, port 7&8, n.sub.SCID = 1 1 1 layer,
port 7, n.sub.SCID = 1 0 1 layer, port 7, n.sub.SCID = 0 (OCC = 2
or OCC = 4) 1 1 layer, port 8, n.sub.SCID = 0 2 1 layer, port 8,
n.sub.SCID = 1 3 2 layer, port 7&8, n.sub.SCID = 0 2 1 layer,
port 8, n.sub.SCID = 0 0 1 layer, port 7, n.sub.SCID = 0 (OCC = 2
or OCC = 4) 1 1 layer, port 7, n.sub.SCID = 1 2 1 layer, port 8,
n.sub.SCID = 1 3 2 layer, port 7&8, n.sub.SCID = 1 3 1 layer,
port 8, n.sub.SCID = 1 0 1 layer, port 7, n.sub.SCID = 0 (OCC = 2
or OCC = 4) 1 1 layer, port 7, n.sub.SCID = 1 2 1 layer, port 8,
n.sub.SCID = 0 3 2 layer, port 7&8, n.sub.SCID = 0 4 1 layer,
port 11, n.sub.SCID = 0 1 1 layer, port 11, n.sub.SCID = 1 (OCC =
4) 2 1 layer, port 13, n.sub.SCID = 0 3 1 layer, port 13,
n.sub.SCID = 1 4 2 layer, port 11&13, n.sub.SCID = 1 5 1 layer,
port 11, n.sub.SCID = 1 1 1 layer, port 11, n.sub.SCID = 0 (OCC =
4) 2 1 layer, port 13, n.sub.SCID = 0 3 1 layer, port 13,
n.sub.SCID = 1 4 2 layer, port 11&13, n.sub.SCID = 0 6 1 layer,
port 13, n.sub.SCID = 0 1 1 layer, port 11, n.sub.SCID = 0 (OCC =
4) 2 1 layer, port 11, n.sub.SCID = 1 3 1 layer, port 13,
n.sub.SCID = 1 4 2 layer, port 11&13, n.sub.SCID = 1 7 1 layer,
port 13, n.sub.SCID = 1 1 1 layer, port 11, n.sub.SCID = 0 (OCC =
4) 2 1 layer, port 11, n.sub.SCID = 1 3 1 layer, port 13,
n.sub.SCID = 0 4 2 layer, port 11&13, n.sub.SCID = 0
[0250] In Table 5.2, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different.
TABLE-US-00010 TABLE 5.3 Sequence number of DMRS port of
interference terminal (rank of target terminal is 2) (overhead is 2
bit) Target terminal Interference terminal Value Message Value
Message 0 2 layer, port 7&8, 0 1 layer, port 7, n.sub.SCID = 1
n.sub.SCID = 0 (OCC = 2) 1 1 layer, port 8, n.sub.SCID = 1 2 2
layer, port 7&8, n.sub.SCID = 1 3 Reserved 1 2 layer, port
7&8, 0 1 layer, port 7, n.sub.SCID = 0 n.sub.SCID = 1 (OCC = 2)
1 1 layer, port 8, n.sub.SCID = 0 2 2 2 layer, port 7&8,
n.sub.SCID = 0 3 Reserved 2 layer, port 11&13, 0 1 layer, port
11, n.sub.SCID = 1 n.sub.SCID = 0 (OCC = 4) 1 1 layer, port 13,
n.sub.SCID = 1 2 2 layer, port 11&13, n.sub.SCID = 1 3 Reserved
3 2 layer, port 11&13, 0 1 layer, port 11, n.sub.SCID = 0
n.sub.SCID = 1 (OCC = 4) 1 1 layer, port 13, n.sub.SCID = 0 2 2
layer, port 11&13, n.sub.SCID = 0 3 Reserved
[0251] In Table 5.3, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different. At operation 502, the
indication information is sent to the target terminal to enable the
target terminal to cancel interference based on the indication
information during data reception of multi-user superposition.
[0252] Embodiment 6
[0253] FIG. 6 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 6, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0254] At operation 601, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0255] The indication information is: an interference presence ID,
a sequence number of a DMRS port used by an interference terminal,
and a modulation order used by an interference signal.
[0256] The layer quantity of data of a target signal is 1 or 2. The
layer quantity of data of an interference signal is 1 or 2.
[0257] The overhead of the indication information is 4 bit in
total, wherein the overhead of a modulation order is 2 bit, and the
overhead of joint coding of the interference presence ID and the
DMRS port number is 2 bit, as shown in Tables 6.1 to 6.3.
TABLE-US-00011 TABLE 6.1 Modulation mode of interference terminal
(overhead is 2 bit) MO of interference terminal Value Message 0
QPSK 1 16QAM 2 64QAM 3 Reserved
TABLE-US-00012 TABLE 6.2 Joint coding of interference presence ID
and sequence number of DMRS port of interference terminal, layer
quantity of data and SCID (rank of target terminal is 1) (overhead
is 2 bit) Target terminal Interference terminal Value Message Value
Message 0 1 layer, port 7, n.sub.SCID = 0 0 Interference absence
(OCC = 2 or OCC = 4) 1 1 layer, port 7, n.sub.SCID = 1 2 1 layer,
port 8, n.sub.SCID = 0 3 2 layer, port 7&8, n.sub.SCID = 1 1 1
layer, port 7, n.sub.SCID = 1 0 Interference absence (OCC = 2 or
OCC = 4) 1 1 layer, port 7, n.sub.SCID = 0 2 1 layer, port 8,
n.sub.SCID = 1 3 2 layer, port 7&8, n.sub.SCID = 0 2 1 layer,
port 8, n.sub.SCID = 0 0 Interference absence (OCC = 2 or OCC = 4)
1 1 layer, port 7, n.sub.SCID = 0 2 1 layer, port 8, n.sub.SCID = 1
3 2 layer, port 7&8, n.sub.SCID = 1 3 1 layer, port 8, nSCID =
1 0 Interference absence (OCC = 2 or OCC = 4) 1 1 layer, port 7,
n.sub.SCID = 1 2 1 layer, port 8, n.sub.SCID = 0 3 2 layer, port
7&8, n.sub.SCID = 0 4 1 layer, port 11, n.sub.SCID = 0 0
Interference absence (OCC = 4) 1 1 layer, port 11, n.sub.SCID = 1 2
1 layer, port 13, n.sub.SCID = 0 3 2 layer, port 11&13,
n.sub.SCID = 1 5 1 layer, port 11, n.sub.SCID = 1 0 Interference
absence (OCC = 4) 1 1 layer, port 11, n.sub.SCID = 0 2 1 layer,
port 13, n.sub.SCID = 1 3 2 layer, port 11&13, n.sub.SCID = 0 6
1 layer, port 13, n.sub.SCID = 0 0 Interference absence (OCC = 4) 1
1 layer, port 11, n.sub.SCID = 0 2 1 layer, port 13, n.sub.SCID = 1
3 2 layer, port 11&13, n.sub.SCID = 1 7 1 layer, port 13,
n.sub.SCID = 1 0 Interference absence (OCC = 4) 1 1 layer, port 11,
n.sub.SCID = 1 2 1 layer, port 13, n.sub.SCID = 0 3 2 layer, port
11&13, n.sub.SCID = 0
[0258] In Table 6.2, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different. In a case that the
sequence numbers of the DMRS ports of the target terminal and the
interference terminal are different, the SCIDs thereof are the
same.
TABLE-US-00013 TABLE 6.3 Joint coding of sequence number of DMRS
port of interference terminal, scrambling ID and layer quantity
(rank of target terminal is 2) (overhead is 2 bit) Target terminal
Interference terminal Value Message Value Message 0 2 layer, port
7&8, 0 Interference absence n.sub.SCID = 0 (OCC = 2) 1 1 layer,
port 7, n.sub.SCID = 1 2 1 layer, port 8, n.sub.SCID = 1 3 2 layer,
port 7&8, n.sub.SCID = 1 1 2 layer, port 7&8, 0
Interference absence n.sub.SCID = 1 (OCC = 2) 1 1 layer, port 7,
n.sub.SCID = 0 2 1 layer, port 8, n.sub.SCID = 0 3 2 layer, port
7&8, n.sub.SCID = 0 2 2 layer, port 11&13, 0 Interference
absence n.sub.SCID = 0 (OCC = 4) 1 1 layer, port 11, n.sub.SCID = 1
2 1 layer, port 13, n.sub.SCID = 1 3 2 layer, port 11&13,
n.sub.SCID = 1 3 2 layer, port 11&13, 0 Interference absence
n.sub.SCID = 1 (OCC = 4) 1 1 layer, port 11, n.sub.SCID = 0 2 1
layer, port 13, n.sub.SCID = 0 3 2 layer, port 11&13,
n.sub.SCID = 0
[0259] In Table 6.3, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different.
[0260] At operation 602, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0261] Embodiment 7
[0262] When one codeword stream is enabled and layer quantity of a
target terminal is 1, a port used by the target terminal is port 7
or port 8.
[0263] Embodiment 8
[0264] FIG. 7 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 7, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0265] At operation 801, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0266] The indication information is: an interference presence ID,
a DMRS port used by an interference terminal, and a modulation
order used by an interference signal.
[0267] The layer quantity of data of a target signal is 1 or 2. The
layer quantity of data of an interference signal is 1 or 2.
[0268] The indication information further includes: a DMRS port
used by a target terminal.
[0269] The indication of the interference presence ID and the
modulation order information used by the interference signal refers
to the related description of the foregoing embodiments, and
details are not described herein again.
[0270] The joint coding indicating DMRS information of the
interference terminal and DMRS information of the target terminal
is as shown in Tables 8.1 to 8.2.
TABLE-US-00014 TABLE 8.1 Joint coding of DMRS information of
Interference terminal and DMRS information of Target terminal
(single codeword stream is enabled) (overhead is 3 bit) Value
Message 0 Target signal is 1 layer, port 7, n.sub.SCID = 0;
Interfernece signal is 1 layer, port 8 n.sub.SCID = 0; 1 Target
signal is 1 layer, port 7, n.sub.SCID = 1; Interfernece signal is 1
layer, port 8, n.sub.SCID = 1; 2 Target signal is 1 layer, port 8,
n.sub.SCID = 0; Interfernece signal is 1 layer, port 7 n.sub.SCID =
0; 3 Target signal is 1 layer, port 8, n.sub.SCID = 1; Interfernece
signal is 1 layer, port 7, n.sub.SCID = 1; 4 Target signal is 2
layer, port 7&8, n.sub.SCID = 0; Interfernece signal is 2
layer, port 11&13, n.sub.SCID = 0; 5 Target signal is 2 layer,
port 7&8, n.sub.SCID = 1; Interfernece signal is 2 layer, port
11&13, n.sub.SCID = 1; 6 Target signal is 2 layer, port
11&13, n.sub.SCID = 0; Interfernece signal is 2 layer, port
7&8, n.sub.SCID = 0; 7 Target signal is 2 layer, port
11&13, n.sub.SCID = 1; Interfernece signal is 2 layer, port
7&8, n.sub.SCID = 1;
[0271] In Table 8.1, in a case that the sequence numbers of the
DMRS ports of the target terminal and the interference terminal are
the same, the SCIDs thereof are different. In a case that the
sequence numbers of the DMRS ports of the target terminal and the
interference terminal are different, the SCIDs thereof are the
same. The port in
[0272] Table 8.1 refers to a DMRS port.
TABLE-US-00015 TABLE 8.2 Joint coding of DMRS information of
Interference terminal and DMRS information of Target terminal
(double codeword stream is enabled) (overhead is 3 bit) Value
Message 0 Target signal is 2 layer, port 7&8, n.sub.SCID = 0;
Interfernece signal is 2 layer, port 11&13, n.sub.SCID = 0; 1
Target signal is 2 layer, port 7&8, n.sub.SCID = 0;
Interfernece signal is 2 layer, port 11&13, n.sub.SCID = 1; 2
Target signal is 2 layer, port 7&8, n.sub.SCID = 1;
Interfernece signal is 2 layer, port 11&13, n.sub.SCID = 0; 3
Target signal is 2 layer, port 7&8, n.sub.SCID = 1;
Interfernece signal is 2 layer, port 11&13, n.sub.SCID = 1; 4
Target signal is 2 layer, port 11&13, n.sub.SCID = 0;
Interfernece signal is 2 layer, port 7&8, n.sub.SCID = 0; 5
Target signal is 2 layer, port 11&13, n.sub.SCID = 0;
Interfernece signal is 2 layer, port 7&8, n.sub.SCID = 1; 6
Target signal is 2 layer, port 11&13, n.sub.SCID = 1;
Interfernece signal is 2 layer, port 7&8, n.sub.SCID = 0; 7
Target signal is 2 layer, port 11&13, n.sub.SCID = 1;
Interfernece signal is 2 layer, port 7&8, n.sub.SCID = 1;
[0273] The port in Table 8.2 refers to a DMRS port. At operation
802, the indication information is sent to the target terminal to
enable the target terminal to cancel interference based on the
indication information during data reception of multi-user
superposition.
[0274] Embodiment 9
[0275] FIG. 8 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a base station. As shown in FIG. 8, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0276] At operation 901, indication information for a target
terminal is acquired. Here, the indication information is used for
the target terminal to perform interference cancellation based on
the indication information during data reception of multi-user
superposition.
[0277] The indication information is: an interference presence ID,
a DMRS port used by an interference terminal, and a modulation
order used by an interference signal.
[0278] The layer quantity of data of a target signal is 1 or 2. The
layer quantity of data of an interference signal is 1 or 2.
[0279] The indication information further includes: a DMRS port
used by a target terminal.
[0280] The indication of the interference presence ID and the
modulation order information used by the interference signal refers
to the foregoing embodiments.
[0281] The joint coding indicating DMRS information of the
interference terminal and DMRS information of the target terminal
is as shown in Tables 9.1 to 9.2 or as shown in Tables 9.1 and
9.3.
TABLE-US-00016 TABLE 9.1 Joint coding of DMRS information of
Interference terminal and DMRS information of Target terminal
(single codeword stream is enabled) (overhead is 3 bit) Value
Message 0 Target signal is 1 layer, port 7; Interfernece signal is
1 layer, port 8; 1 Target signal is 1 layer, port 8; Interfernece
signal is 1 layer, port 7; 2 Target signal is 1 layer, port 11;
Interfernece signal is 1 layer, port 7&8; 3 Target signal is 2
layer, port 7; Interfernece signal is 2 layer, port 11&13; 4
Target signal is 2 layer, port 7&8; Interfernece signal is 2
layer, port 11&13; 5 Target signal is 2 layer, port 7&8;
Interfernece signal is 2 layer, port 11; 6 Target signal is 2
layer, port 11&13; Interfernece signal is 2 layer, port
7&8; 7 Target signal is 2 layer, port 11&13; Interfernece
signal is 2 layer, port 7;
[0282] The port in Table 9.2 refers to a DMRS port, and the SCID
may be set as needed. The nSCID of a target user and the nSCID of
an interference user are the same or different; the nSCID is an
agreed value, such as, fixed to 0 or 1 in an interference
scene.
TABLE-US-00017 TABLE 9.2 Joint coding of DMRS information of
Interference terminal and DMRS information of Target terminal
(double codeword stream is enabled) (overhead is 3 bit) Value
Message 0 Target signal is 2 layer, port 7&8; Interference
signal is 2 layer, port 11&13; 1 Target signal is 2 layer, port
11&13; Interference signal is 2 layer, port 7&8; 2 Target
signal is 2 layer, port 7&8; Interference signal is 2 layer,
port 11; 3 Target signal is 2 layer, port 11&13; Target signal
is 2 layer, port 7; 4-7 Reserved
[0283] The port in Table 9.2 refers to a DMRS port, and the SCID
may be set as needed. The nSCID of a target user and the nSCID of
an interference user are the same or different; the nSCID is an
agreed value, such as, fixed to 0 or 1 in an interference
scene.
TABLE-US-00018 TABLE 9.3 Joint coding of DMRS information of
Interference terminal and DMRS information of Target terminal (two
codeword streams are enabled) (overhead is 3 bit) Value Message 0
Target signal is 2 layer, port 7&8; n.sub.SCID=0 Interference
signal is 2 layer, port 11&13; n.sub.SCID=0 1 Target signal is
2 layer, port 11&13; n.sub.SCID=0 Interference signal is 2
layer, port 7&8; n.sub.SCID=0 2 Target signal is 2 layer, port
11&13; n.sub.SCID=0 Interference signal is 1 layer, port 7;
n.sub.SCID=0 3 Target signal is 2 layer, port 7&8; n.sub.SCID=0
Interference signal is 1 layer, port 11; n.sub.SCID=0 4 Target
signal is 2 layer, port 7&8; n.sub.SCID=1 Interference signal
is 2 layer, port 11&13; n.sub.SCID=1 5 Target signal is 2
layer, port 11&13; n.sub.SCID=1 Interference signal is 2 layer,
port 7&8; n.sub.SCID=1 6 Target signal is 2 layer, port
11&13; n.sub.SCID=1 Interference signal is 1 layer, port 7;
n.sub.SCID=1 7 Target signal is 2 layer, port 7&8; n.sub.SCID=1
Interference signal is 1 layer, port 11; n.sub.SCID=1
[0284] At operation 902, the indication information is sent to the
target terminal to enable the target terminal to cancel
interference based on the indication information during data
reception of multi-user superposition.
[0285] Embodiment 10
[0286] DMRS port information of a target terminal is shown in
Tables 10.1 and 10.2.
TABLE-US-00019 TABLE 10.1 DMRS port information of Target terminal
(single codeword stream is enabled) (overhead is 3 bit) Value
Message 0 Target signal is 1 layer, port 7, n.sub.SCID = 0 1 Target
signal is 1 layer, port 7, n.sub.SCID = 1; 2 Target signal is 1
layer, port 8, n.sub.SCID = 0; 3 Target signal is 1 layer, port 8,
n.sub.SCID = 1; 4 Target signal is 2 layer, port 7&8,
n.sub.SCID = 0; 5 Target signal is 2 layer, port 7&8,
n.sub.SCID = 1; 6 Target signal is 2 layer, port 11&13,
n.sub.SCID = 0; 7 Target signal is 2 layer, port 11&13,
n.sub.SCID = 1;
TABLE-US-00020 TABLE 10.2 DMRS port information of Target terminal
(two codeword streams are enabled) (overhead is 2 bit) Value
Message 0 2 layer, port 7&8, n.sub.SCID = 0; 1 2 layer, port
7&8, n.sub.SCID = 1; 2 2 layer, port 11&13, n.sub.SCID = 0;
3 2 layer, port 11&13, n.sub.SCID = 1;
[0287] Embodiment 11
[0288] FIG. 9 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
The method is applied to a target terminal. As shown in FIG. 9, the
information transmission method according to an embodiment of the
disclosure includes the operations as follows.
[0289] At operation 1101, indication information sent by a base
station is received.
[0290] Here, the indication information may separately indicate a
certain piece of information by means of independent coding or
joint coding, or jointly indicate multiple pieces of information by
means of independent coding and joint coding, and the indication
information includes at least one of the following: [0291] a data
transmission mode, a DMRS port used by an interference terminal,
precoding information used by an interference signal, PRB
granularity used by MUST, layer quantity of target signal data, a
sequence number of a layer where the interfered target signal data
is located, and a DMRS port used by a target terminal.
[0292] Here, it is to be noted that the indication information in
the present embodiment is the same as the indication information
described in the first embodiment, and details are not repeated
herein.
[0293] In the embodiment, the indication information includes a
storage sequence number of a PMI used by the interference
signal.
[0294] Correspondingly, after indication information sent by a base
station is received, the method further includes the operations as
follows.
[0295] The target terminal acquires a PMI used by a target signal,
a rank used by the target signal and a first information comparison
table used by the target signal.
[0296] The first information comparison table is searched for based
on a storage sequence number of a PMI used by an interference
signal, the PMI used by the target signal and the rank used by the
target signal, so as to obtain the PMI used by the interference
signal.
[0297] Here, the first information comparison table is a table of
comparison between a storage sequence number of a PMI used by an
interference signal and the PMI used by the interference
signal.
[0298] In the embodiment, the indication information includes: a
data transmission mode and a DMRS port used by a target terminal,
wherein the data transmission mode is a MUST mode.
[0299] Correspondingly, after indication information sent by a base
station is received, the method further includes the operations as
follows.
[0300] The DMRS port used by the target terminal in the indication
information is acquired, and a DMRS port used by an interference
terminal is obtained according to the DMRS port used by the target
terminal.
[0301] At operation 1102, interference cancellation is performed
based on the indication information during data reception of
multi-user superposition.
[0302] The process in which the target terminal performs
interference cancellation based on the indication information after
acquiring the indication information during data reception of
multi-user superposition belongs to the existing art, and details
are not repeated herein.
[0303] By applying the above embodiment of the disclosure, a target
terminal receives indication information sent by a base station and
required for interference cancellation, so as to perform
interference information cancellation based on the indication
information during data reception of multi-user superposition.
Based on actual characteristics of a MUST technology, the redundant
information is removed as much as possible to reduce the overhead
of the transmission information. The interference cancellation
performance of a MUST system is improved by transmitting downlink
MUST parameter information while maintaining little influence on
the existing LTE signaling.
[0304] Embodiment 12
[0305] FIG. 10 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 10, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows.
[0306] At operation 1201, a base station acquires indication
information for a target terminal, the indication information
including a data transmission mode.
[0307] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0308] In the embodiment of the disclosure, the indication
information includes only a data transmission mode, and the data
transmission mode is indicated by using an independent coding
manner, where the indication information is 1 bit.
[0309] According to actual needs, when the bit value of the
indication information is 1, the transmission mode from the base
station to the target terminal is MUST.
[0310] When the bit value of the indication information is 0, the
transmission mode from the base station to the target terminal is
non-MUST.
[0311] Of course, when the bit value of the indication information
is 0, the transmission mode from the base station to the target
terminal may be set as MUST.
[0312] When the bit value of the indication information is 1, the
transmission mode from the base station to the target terminal is
non-MUST.
[0313] At operation 1202, the indication information is sent to the
target terminal.
[0314] In the present embodiment, a base station uses a small
overhead to indicate a transmission mode, and a target terminal
directly obtains the transmission mode of target signal data by
using the indication information sent by the base station, and
further knows that in the case that the transmission mode is MUST,
the redundant interference information is eliminated as much as
possible.
[0315] Embodiment 13
[0316] FIG. 11 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 11, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows.
[0317] At operation 1301, a base station acquires indication
information for a target terminal, the indication information
including layer quantity of target signal data and a sequence
number of a layer where the interfered target signal data is
located.
[0318] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0319] In the embodiment of the disclosure, the indication
information includes 2 layers of target signal data and a sequence
number of the layer where the interfered target signal data is
located, and the information is indicated by means of joint coding,
where the overhead of the indication information is 2 bits.
[0320] According to actual needs, when the value of the first bit
of the indication information is 1, it is indicated that the first
layer signal of the target signal is interfered by other
signals.
[0321] When the value of the first bit of the indication
information is 0, it is indicated that the first layer signal of
the target signal is not interfered by other signals.
[0322] When the value of the second bit of the indication
information is 1, it is indicated that the second layer signal of
the target signal is interfered by other signals.
[0323] When the value of the second bit of the indication
information is 0, it is indicated that the second layer signal of
the target signal is not interfered by other signals.
[0324] Or, when the value of the first bit of the indication
information is 0, it is indicated that the first layer signal of
the target signal is interfered by other signals.
[0325] When the value of the first bit of the indication
information is 1, it is indicated that the first layer signal of
the target signal is not interfered by other signals.
[0326] When the value of the second bit of the indication
information is 0, it is indicated that the second layer signal of
the target signal is interfered by other signals.
[0327] When the value of the second bit of the indication
information is 1, it is indicated that the second layer signal of
the target signal is not interfered by other signals.
[0328] At operation 1302, the indication information is sent to the
target terminal.
[0329] In the present embodiment, a base station uses a small
overhead to indicate layer quantity of target signal data and a
sequence number of a layer where the interfered target signal data
is located, and a target terminal directly obtains layer quantity
of the target signal data and the sequence number of the layer
where the interfered target signal data is located by using the
indication information sent by the base station, and further
eliminates the redundant interference information as much as
possible, thereby effectively improving the interference
cancellation performance of a system.
[0330] Embodiment 14
[0331] FIG. 12 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 12, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows.
[0332] At operation 1401, a base station acquires indication
information for a target terminal, the indication information
including a data transmission mode, layer quantity of target signal
data and a sequence number of a layer where the interfered target
signal data is located.
[0333] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0334] In the embodiment of the disclosure, the indication
information includes a data transmission mode, 2 layers of target
signal data and a sequence number of the layer where the interfered
target signal data is located, where the overhead of the indication
information is 2 bits.
[0335] According to actual needs, when the value of the first bit
of the indication information is 0, it is indicated that the first
layer signal of the target signal is interfered by other signals,
and when the value is 1, it is indicated that the first layer
signal of the target signal is not interfered by other signals.
[0336] When the value of the second bit of the indication
information is 0, it is indicated that the second layer signal of
the target signal is interfered by other signals; and when the
value is 1, it is indicated that the second layer signal of the
target signal is not interfered by other signals.
[0337] When the value of the first bit of the indication
information or the value of the second bit is 0, it is indicated
that the data transmission mode from the base station to the target
terminal is MUST.
[0338] When the value of the first bit and the value of the second
bit of the indication information are both 1, it is indicated that
the data transmission mode from the base station to the target
terminal is non-MUST.
[0339] At operation 1402, the indication information is sent to the
target terminal.
[0340] In the present embodiment, a base station uses a small
overhead to indicate a data transmission mode, layer quantity of
target signal data and a sequence number of a layer where the
interfered target signal data is located, and a target terminal
directly obtains the above information by using the indication
information sent by the base station, and further eliminates the
redundant interference information as much as possible in the case
of MUST, thereby effectively improving the interference
cancellation performance of a system.
[0341] Embodiment 15
[0342] FIG. 13 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 13, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows. At operation 1501, a base station acquires indication
information for a target terminal, the indication information
including layer quantity of target signal data, a sequence number
of a layer where the interfered target signal data is located, and
a DMRS port used by the target terminal.
[0343] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0344] In the present embodiment, the overhead of the indication
information is 2 bits, and different bit values correspond to
different information contents, specifically as shown in Table
1.
TABLE-US-00021 TABLE 1 Bit value Indicated information content 0 2
layers of data, sequence numbers of DMRS ports are 7 and 8, and the
first and second layers of data are interfered 1 2 layers of data,
sequence numbers of DMRS ports are 7 and 8, and the first layer of
data is interfered 2 2 layers of data, sequence numbers of DMRS
ports are 7 and 8, and the second layer of data is interfered 3 2
layers of data, sequence numbers of DMRS ports are 7 and 8, and the
first and second layers of data are not interfered 4 1 layer of
data, sequence numbers of DMRS ports are 7 and 8, and the first and
second layers of data are not interfered 5 1 layer of data, and a
sequence number of a DMRS port is 7 6 1 layer of data, and a
sequence number of a DMRS port is 8 7 Reserved
[0345] At operation 1502, the indication information is sent to the
target terminal.
[0346] Embodiment 16
[0347] FIG. 14 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 14, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows.
[0348] At operation 1601, a base station acquires indication
information for a target terminal, the indication information
including a DMRS port used by an interference terminal.
[0349] In the present embodiment, the overhead of the indication
information is 2 bits. When the first bit value of the indication
information is 0 and the second bit value is 0, the indication
information indicates that the DMRS port number used by the
interference terminal is 7.
[0350] When the first bit value of the indication information is 0
and the second bit value is 1, the indication information indicates
that the DMRS port number used by the interference terminal is
8.
[0351] When the first bit value of the indication information is 1
and the second bit value is 0, the indication information indicates
that the DMRS port number used by the interference terminal is
9.
[0352] When the first bit value of the indication information is 1
and the second bit value is 1, the indication information indicates
that the DMRS port number used by the interference terminal is
10.
[0353] Here, it is to be noted that different information
indications may be performed by using the above coding indication
mode. For example, when the indication information includes a PMI
used by an interference signal, the following manner may be used to
perform the following setting: [0354] in the embodiment, the number
of transmitting antenna ports of the base station is 2; [0355] when
the first bit value of the indication information is 0 and the
second bit value is 0, the indication information indicates that
the PMI used by the interference signal is 0; [0356] when the first
bit value of the indication information is 0 and the second bit
value is 1, the indication information indicates that the PMI used
by the interference signal is 1; [0357] when the first bit value of
the indication information is 1 and the second bit value is 0, the
indication information indicates that the PMI used by the
interference signal is 2; [0358] when the first bit value of the
indication information is 1 and the second bit value is 1, the
indication information indicates that the PMI used by the
interference signal is 3.
[0359] Or, when the indication information includes a storage
sequence number of the PMI used by the interference signal, the
following manner may be used to perform the following setting:
[0360] when the first bit value of the indication information is 0
and the second bit value is 0, the indication information indicates
that the storage sequence number of the PMI used by the
interference signal is 0 (or 1); [0361] when the first bit value of
the indication information is 0 and the second bit value is 1, the
indication information indicates that the storage sequence number
of the PMI used by the interference signal is 1 (or 2); [0362] when
the first bit value of the indication information is 1 and the
second bit value is 0, the indication information indicates that
the storage sequence number of the PMI used by the interference
signal is 2 (or 3); [0363] when the first bit value of the
indication information is 1 and the second bit value is 1, the
indication information indicates that the storage sequence number
of the PMI used by the interference signal is 3 (or 4).
[0364] At operation 1602, the indication information is sent to the
target terminal.
[0365] Embodiment 17
[0366] FIG. 15 is a schematic flowchart of an information
transmission method according to an embodiment of the disclosure.
As shown in FIG. 15, the information transmission method according
to an embodiment of the disclosure includes the operations as
follows.
[0367] At operation 1701, a base station acquires indication
information for a target terminal, the indication information
including PRB granularity used by MUST.
[0368] Here, the indication information is used for the target
terminal to perform interference cancellation based on the
indication information during data reception of multi-user
superposition.
[0369] In the present embodiment, the overhead of the indication
information is 2 bits. In practical applications, the following
setting may be performed: [0370] when the first bit value of the
indication information is 0 and the second bit value is 0, the
indication information indicates that the PRB granularity used by
MUST is full bandwidth, as shown in FIG. 16a; [0371] when the first
bit value of the indication information is 0 and the second bit
value is 1, the indication information indicates that the PRB
granularity used by MUST is a sub-band predetermined by a system,
as shown in FIG. 16b; [0372] when the first bit value of the
indication information is 1 and the second bit value is 0, the
indication information indicates that the PRB granularity used by
MUST is 1, as shown in FIG. 16c; [0373] when the first bit value of
the indication information is 1 and the second bit value is 1, the
indication information indicates that the PRB granularity used by
MUST is 2, as shown in FIG. 16d.
[0374] At operation 1702, the indication information is sent to the
target terminal.
[0375] Embodiment 18
[0376] FIG. 17 is a schematic flowchart of a method for a target
terminal to acquire a PMI used by an interference signal according
to an embodiment of the disclosure. As shown in FIG. 17, the method
for acquiring a PMI used by an interference signal by a target
terminal according to an embodiment of the disclosure includes the
operations as follows.
[0377] At operation 1801, a PMI used by a target signal, a rank
used by the target signal, a storage sequence number of a PMI used
by an interference signal, and a first information comparison table
used by the target signal are acquired.
[0378] In the present embodiment, the number of transmitting
antennas is 4Tx; based on transmission data of a CRS port, the PMI
used by the target signal is a precoding weight number p.sub.2 used
by the target signal, the rank used by the target signal is
r.sub.2, the storage sequence number of the PMI used by the
interference signal is lm, and the first information comparison
table includes Table A1 and Table A2.
[0379] At operation 1802, the first information comparison table is
searched for based on a storage sequence number of a PMI used by an
interference signal, the PMI used by the target signal and the rank
used by the target signal, so as to obtain the PMI used by the
interference signal.
[0380] In the present embodiment, the present operation includes:
[0381] first, Table A1 or Table A2 is determined to be searched for
in Table A according to the rank r.sub.2 used by the target signal;
[0382] second, according to the precoding weight number p.sub.2
used by the target signal, a PMI sequence L used by the
interference signal used by the row is found; [0383] then,
according to the storage sequence number 1.sub.M indicated by the
indication information, the 1.sub.Mth PMI in the sequence L is
found as the precoding sequence number PMI used by the interference
signal.
[0384] Table A1is a codeword pairing situation table with rank 1
and Table A2 is a codeword pairing situation table with rank 2,
which are shown as follows.
TABLE-US-00022 TABLE A1 PMI used by target signal PMI used by
interference signal 0 0, 9, 11 1 1, 8, 10 2 2, 9, 11 3 3, 8, 10 4 4
5 5 6 6 7 7 8 1, 3, 8 9 0, 2, 9 10 1, 3, 10 11 0, 2, 11 12 12 13 13
14 14 15 15
TABLE-US-00023 TABLE A2 PMI used by target signal PMI used by
interference signal 0 0, 1, 3, 9 1 0, 1, 2, 8 2 1, 2, 3, 9 3 0, 2,
3, 8 4 4, 5, 7 5 4, 5 6 6 7 4, 7 8 1, 3, 8, 9 9 0, 2, 8, 9 10 10 11
11 12 12 13 13 14 14 15 15
[0385] In each row of Table A1, an angle between a codeword
indicated by the PMI used by the target signal and a codeword
indicated by the PMI used by the interference signal is less than
or equal to 45 degrees.
[0386] In each row of Table A2, an angle between a codeword
indicated by the PMI used by the target signal and a codeword
indicated by the PMI used by the interference signal is less than
or equal to 45 degrees.
[0387] Embodiment 19
[0388] FIG. 18 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a base station. As shown in FIG. 18, the
information transmission device according to an embodiment of the
disclosure includes: an acquisition module 131 and a sending module
132.
[0389] The acquisition module 131 is configured to acquire
indication information for a target terminal.
[0390] The sending module 132 is configured to send the indication
information to the target terminal to enable the target terminal to
cancel interference based on the indication information during data
reception of multi-user superposition.
[0391] Here, the indication information may separately indicate a
certain piece of information by means of independent coding or
joint coding, or jointly indicate multiple pieces of information by
means of independent coding and joint coding, and the indication
information includes at least one of the following: [0392] a data
transmission mode, a sequence number of a DMRS port used by an
interference terminal, a rank used by an interference signal,
precoding information used by the interference signal, PRB
granularity used by MUST, layer quantity of target signal data, and
a sequence number of a layer where the interfered target signal
data is located.
[0393] The precoding information used by the interference signal
is: a PMI used by the interference signal, or a storage sequence
number of the PMI used by the interference signal; the PMI used by
the interference signal is a non-negative integer; and the storage
sequence number of the PMI used by the interference signal is a
non-negative integer.
[0394] The data transmission mode includes: a MUST mode and a
non-MUST mode.
[0395] Here, it is to be noted that the indication information in
the present embodiment is the same as the indication information
described in the first method embodiment, and details are not
repeated herein.
[0396] In the embodiment, the indication information includes a
storage sequence number of a PMI used by the interference
signal.
[0397] Correspondingly, the acquisition module 131 is further
configured to: acquire a PMI used by a target signal, a rank used
by the target signal, a PMI used by an interference signal, a rank
used by the interference signal, and a first information comparison
table used by the interference signal; and [0398] search for the
first information comparison table based on the PMI used by the
target signal, the rank used by the target signal, the PMI used by
the interference signal and the rank used by the interference
signal, so as to obtain a storage sequence number of the PMI used
by the interference signal.
[0399] In the embodiment, the acquisition module is further
configured to determine, when the data transmission mode is MUST,
that the DMRS port used by the target terminal is a first port and
the DMRS port used by the interference terminal is a second port
according to a predetermined criterion, and send data based on the
first port and the second port.
[0400] The DMRS port used by the target terminal is one-to-one
mapping with the
[0401] DMRS port used by the interference terminal.
[0402] Specifically, the acquisition module is further configured
to: [0403] when there is one DMRS port used by the target terminal
and there is one DMRS port used by the interference terminal,
[0404] determine that the DMRS port number used by the target
terminal is 7 and the DMRS port number used by the interference
terminal is 8 according to a predetermined criterion; [0405] or,
determine that the DMRS port number used by the target terminal is
7 and the DMRS port number used by the interference terminal is 9
according to a predetermined criterion; [0406] or, determine that
the DMRS port number used by the target terminal is 7 and the DMRS
port number used by the interference terminal is 10 according to a
predetermined criterion; [0407] or, determine that the DMRS port
number used by the target terminal is 8 and the DMRS port number
used by the interference terminal is 7 according to a predetermined
criterion; [0408] or, determine that the DMRS port number used by
the target terminal is 8 and the DMRS port number used by the
interference terminal is 9 according to a predetermined criterion;
[0409] or, determine that the DMRS port number used by the target
terminal is 8 and the DMRS port number used by the interference
terminal is 10 according to a predetermined criterion; [0410] when
there are two DMRS ports used by the target terminal and there are
two DMRS ports used by the interference terminal, [0411] determine
that the sequence numbers of the DMRS ports used by the target
terminal are 7 and 8 and the sequence numbers of the DMRS ports
used by the interference terminal are 7 and 8 according to a
predetermined criterion; [0412] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 7 and 8
and the sequence numbers of the DMRS ports used by the interference
terminal are 9 and 10 according to a predetermined criterion;
[0413] or, determine that the sequence numbers of the DMRS ports
used by the target terminal are 7 and 9 and the sequence numbers of
the DMRS ports used by the interference terminal are 8 and 10
according to a predetermined criterion; [0414] or, determine that
the sequence numbers of the DMRS ports used by the target terminal
are 8 and 10 and the sequence numbers of the DMRS ports used by the
interference terminal are 7 and 9 according to a predetermined
criterion; [0415] when there are two DMRS ports used by the target
terminal and there is one DMRS port used by the interference
terminal, [0416] determine that the sequence numbers of the DMRS
ports used by the target terminal are 7 and 8 and the DMRS port
number used by the interference terminal is 7 according to a
predetermined criterion; [0417] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 7 and 8
and the DMRS port number used by the interference terminal is 8
according to a predetermined criterion; [0418] or, determine that
the sequence numbers of the DMRS ports used by the target terminal
are 7 and 8 and the DMRS port number used by the interference
terminal is 9 according to a predetermined criterion; [0419] or,
determine that the sequence numbers of the DMRS ports used by the
target terminal are 7 and 8 and the DMRS port number used by the
interference terminal is 10 according to a predetermined criterion;
[0420] or, determine that the sequence numbers of the DMRS ports
used by the target terminal are 7 and 9 and the DMRS port number
used by the interference terminal is 8 according to a predetermined
criterion; [0421] or, determine that the sequence numbers of the
DMRS ports used by the target terminal are 7 and 9 and the DMRS
port number used by the interference terminal is 10 according to a
predetermined criterion; [0422] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 8 and 10
and the DMRS port number used by the interference terminal is 7
according to a predetermined criterion; [0423] or, determine that
the sequence numbers of the DMRS ports used by the target terminal
are 8 and 10 and the DMRS port number used by the interference
terminal is 9 according to a predetermined criterion; [0424] or,
determine that the sequence numbers of the DMRS ports used by the
target terminal are 9 and 10 and the DMRS port number used by the
interference terminal is 7 according to a predetermined criterion;
[0425] or, determine that the sequence numbers of the DMRS ports
used by the target terminal are 9 and 10 and the DMRS port number
used by the interference terminal is 8 according to a predetermined
criterion; [0426] or, determine that the sequence numbers of the
DMRS ports used by the target terminal are 9 and 10 and the DMRS
port number used by the interference terminal is 9 according to a
predetermined criterion; [0427] or, determine that the sequence
numbers of the DMRS ports used by the target terminal are 9 and 10
and the DMRS port number used by the interference terminal is 10
according to a predetermined criterion.
[0428] Embodiment 20
[0429] FIG. 19 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a base station. As shown in FIG. 19, the
information transmission device according to an embodiment of the
disclosure includes: an acquisition module 141 and a sending module
142.
[0430] The acquisition module 141 is configured to acquire
indication information for a target terminal.
[0431] The sending module 142 is configured to send the indication
information to the target terminal to enable the target terminal to
cancel interference based on the indication information during data
reception of multi-user superposition.
[0432] The indication information is: a DMRS port used by an
interference terminal, and a modulation order used by an
interference signal.
[0433] The implementation of the DMRS port used by the interference
terminal is described as same as that in Embodiment 16.
[0434] Embodiment 21
[0435] FIG. 20 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a base station. As shown in FIG. 20, the
information transmission device according to an embodiment of the
disclosure includes: an acquisition module 151 and a sending module
152.
[0436] The acquisition module 151 is configured to acquire
indication information for a target terminal.
[0437] The sending module 152 is configured to send the indication
information to the target terminal to enable the target terminal to
cancel interference based on the indication information during data
reception of multi-user superposition.
[0438] The indication information is a modulation order used by an
interference signal.
[0439] Embodiment 22
[0440] FIG. 21 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a target terminal. As shown in FIG. 21,
the information transmission device according to an embodiment of
the disclosure includes a receiving module 161 and a processing
module 162.
[0441] The receiving module 161 is configured to receive indication
information sent by a base station.
[0442] The processing module 162 is configured to perform
interference cancellation based on the indication information
during data reception of multi-user superposition.
[0443] Here, the indication information may separately indicate a
certain piece of information by means of independent coding or
joint coding, or jointly indicate multiple pieces of information by
means of independent coding and joint coding, and the indication
information includes at least one of the following: [0444] a data
transmission mode, a DMRS port used by an interference terminal,
precoding information used by an interference signal, PRB
granularity used by MUST, layer quantity of target signal data, a
sequence number of a layer where the interfered target signal data
is located, and a DMRS port used by a target terminal.
[0445] The precoding information used by the interference signal
is: a PMI used by the interference signal, or a storage sequence
number of the PMI used by the interference signal.
[0446] The data transmission mode includes a MUST mode and a
non-MUST mode.
[0447] Here, it is to be noted that the indication information in
the present embodiment is the same as the indication information
described in the first method embodiment, and details are not
repeated herein.
[0448] In the embodiment, the indication information includes a
storage sequence number of a PMI used by the interference
signal.
[0449] Correspondingly, the processing module 162 is further
configured to: [0450] acquire a PMI used by a target signal, a rank
used by the target signal, and a first information comparison table
used by the target signal; and [0451] search for the first
information comparison table based on a storage sequence number of
a PMI used by an interference signal, the PMI used by the target
signal and the rank used by the target signal, so as to obtain the
PMI used by the interference signal.
[0452] In the embodiment, the indication information includes: a
data transmission mode and a DMRS port used by a target terminal,
wherein the data transmission mode is a MUST mode.
[0453] Correspondingly, the processing module 162 is further
configured to acquire the DMRS port number used by the target
terminal in the indication information, and obtain a DMRS port used
by an interference terminal according to the DMRS port used by the
target terminal.
[0454] Embodiment 23
[0455] FIG. 22 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a target terminal. As shown in FIG. 22,
the information transmission device according to an embodiment of
the disclosure includes: a receiving module 171 and a processing
module 172.
[0456] The receiving module 171 is configured to receive indication
information sent by a base station.
[0457] The processing module 172 is configured to perform
interference cancellation based on the indication information
during data reception of multi-user superposition. The indication
information is: a DMRS port used by an interference terminal, and a
modulation order used by an interference signal.
[0458] Embodiment 24
[0459] FIG. 23 is a composition structure diagram of an information
transmission device according to an embodiment of the disclosure.
The device is located on a target terminal. As shown in FIG. 23,
the information transmission device according to an embodiment of
the disclosure includes: a receiving module 181 and a processing
module 182.
[0460] The receiving module 181 is configured to receive indication
information sent by a base station.
[0461] The processing module 182 is configured to perform
interference cancellation based on the indication information
during data reception of multi-user superposition.
[0462] The indication information is: a modulation order used by an
interference signal.
[0463] In the information transmission device according to the
embodiments of the disclosure, each module may be implemented by a
Central Processing Unit (CPU) or a Digital Signal Processor (DSP),
or a Field Programmable Gate Array (FPGA), or an Application
Specific Integrated Circuit (ASIC) in a server or a terminal. Both
the sending module and the receiving module may be implemented by
an antenna system.
[0464] In the embodiment of the disclosure, the port is a DMRS port
used by an interference terminal, the scrambling ID is a scrambling
ID used by an interference signal, and layer quantity is the number
of layer(s) of an interference signal data.
[0465] The modulation order used by the interference signal and the
interference presence ID are indicated by joint coding.
[0466] The interference presence ID, the port, the scrambling ID
and the layer quantity are indicated by joint coding.
[0467] If DMRS ports of the target terminal and the interference
terminal are different, scrambling IDs of the target terminal and
the interference terminal are set to be the same.
[0468] A set is predefined, and an element of the set is a Physical
Downlink Shared Channel (PDSCH) power parameter; the PDSCH power
parameter is a first type of PDSCH power parameter or a second type
of PDSCH power parameter. DCI is used to indicate whether the first
type of PDSCH power parameter or the second type of PDSCH power
parameter is selected, and a transmitting power is determined
according to the PDSCH power parameter. The PDSCH power parameter
indicates a power of a synthesized symbol or a power of a component
symbol of the synthesized symbol. A calculation mode is indicated
by DCI, a PDSCH power parameter is calculated according to the
indicated calculation mode, and a transmitting power is determined
according to the calculated PDSCH power parameter. The calculation
mode includes: a first type of calculation modes which is obtaining
the PDSCH power parameter based on a PDSCH power where the
synthesized symbol is located; and a second type of calculation
modes which refers to obtaining the PDSCH power parameter based on
a power of a component symbol of the synthesized symbol.
[0469] Here, it is to be noted that the above description of the
devices is similar to the description of the above methods, and the
effects achieved by the devices are as same as these of the
methods, and thus are not repeated. For technical details not
disclosed in the device embodiments of the disclosure, please refer
to the description of the method embodiments of the disclosure.
[0470] The embodiment of the disclosure also provides an
information transmission device. The information transmission
device includes: a processor and a memory configured to store a
computer program runnable on the processor.
[0471] The processor runs the computer program to perform the
information transmission method according to the embodiment of the
disclosure.
[0472] In the embodiment of the disclosure, if the above
information transmission method is implemented in the form of a
software function module and sold or used as a stand-alone product,
it may also be stored in a computer readable storage medium. Based
on such understanding, the essence of the technical solution of the
embodiments of the disclosure or a part contributing to the
existing art may be embodied in the form of a software product that
is stored in a storage medium, including a plurality of
instructions used to cause a computer device (which may be a
personal computer, a server, or a network device, etc.) to perform
all or part of the methods described in various embodiments of the
disclosure. The foregoing storage medium may include various media
capable of storing program codes, such as a U disk, a mobile hard
disk, a Read Only Memory (ROM), a magnetic disk, or an optical
disc. Thus, the embodiments of the disclosure are not limited to
the combination of any specific hardware and software.
[0473] Correspondingly, an embodiment of the disclosure also
provides a computer storage medium having a computer program stored
therein. The computer program is used to perform the information
transmission method according to the embodiment of the
disclosure.
[0474] The above is only the specific implementation manner of the
disclosure, and the scope of protection of the disclosure is not
limited thereto. Any changes or replacements that a person skilled
in the art can easily think of within the technical scope disclosed
by the disclosure shall be covered by the scope of protection of
the disclosure. Therefore, the scope of protection of the
disclosure shall be determined by the scope of the claims.
INDUSTRIAL APPLICABILITY
[0475] In the embodiments of the disclosure, a base station
acquires indication information for a target terminal, and sends
the indication information to the target terminal; and the target
terminal receives the indication information from the base station,
and cancels interference based on the indication information during
data reception of multi-user superposition. Thus, the target
terminal is enabled to receive information required for
interference cancellation with less overhead. The interference
cancellation performance of a MUST system is effectively improved
while maintaining little influence on the existing LTE
signaling.
* * * * *