CN107733491A - A kind of method and device of descending multi-user multi-antenna transmission - Google Patents
A kind of method and device of descending multi-user multi-antenna transmission Download PDFInfo
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- CN107733491A CN107733491A CN201610648995.1A CN201610648995A CN107733491A CN 107733491 A CN107733491 A CN 107733491A CN 201610648995 A CN201610648995 A CN 201610648995A CN 107733491 A CN107733491 A CN 107733491A
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- cqi
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of method and device of descending multi-user multi-antenna transmission.This method includes：Base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the downlink channel condition information of the mobile terminal feedback；The mobile terminal is matched according to the downlink channel condition information and default pairing rules the base station；The base station carries out downlink precoding according to the downlink channel condition information and pairing result, so as to realize that different user on identical running time-frequency resource and identical wave beam while can carry out data transmission, is greatly improved power system capacity.
Description
Technical field
The present embodiments relate to the technical field of communication, more particularly to a kind of method of descending multi-user multi-antenna transmission
And device.
Background technology
In the 5th Generation Mobile Communication System, a typical scene is the mobile broadband scene (eMBB) of enhancing, wherein
One requirement seeks to further improve system descending transmission rate.Space division multiplexing can be used for single user link
TM4 and TM9 in mode, such as Long Term Evolution (Long Term Evolution, LTE)/LTE-A etc..Come for whole cell
Say, then can pass through multi-user transmission, such as multi-user's input and output (Multi-User Multiple-Input
Multiple-Output, MU-MIMO), different user shares identical running time-frequency resource using different spatial beams, so as to carry
The average throughput of high cell, typical scheme include the TM5 and TM9 in LTE/LTE-A.
Although different user can share identical running time-frequency resource to improve power system capacity in MU-MIMO, difference is used
Family remains orthogonal in space.And information theory points out that orthogonal transmission mode is Erasure channel capacity.
The content of the invention
The purpose of the embodiment of the present invention is to propose a kind of method and device of descending multi-user multi-antenna transmission, it is intended to solves
Different user certainly how to allow on identical running time-frequency resource and identical wave beam while the problem of carrying out data transmission.
To use following technical scheme up to this purpose, the embodiment of the present invention：
In a first aspect, a kind of method of descending multi-user multi-antenna transmission, methods described include：
Base station sends the channel state information reference signals of wave beam forming to mobile terminal, and it is anti-to receive the mobile terminal
The downlink channel condition information of feedback；
The mobile terminal is matched according to the downlink channel condition information and default pairing rules the base station；
Wherein, the default pairing rules includes the Signal to Interference plus Noise Ratio SINR numerical value of pairing reporting of user or channel quality refers to
Show that the difference between CQI numerical value exceedes preset difference value threshold value；Or including matching whole precoding informations or the portion of reporting of user
Divide precoding identical or there is strong correlation；
The base station carries out more according to the downlink channel condition information and pairing result to the downlink data for matching user
User's downlink precoding, the downlink precoding are used for pairing user in whole precoding beams, or precoding includes
Transmission is overlapped in the wave beam of part.
Preferably, the downlink channel condition information for receiving the mobile terminal feedback, including：
If that the base station is sent is UE-specific Beamformed CSI-RS, the base station receives the shifting
The CSI-RS of dynamic terminal-pair different beams is measured and is reported corresponding CQI or SINR；
If that the base station is sent is Cell-specific Beamformed CSI-RS, described in the base station reception
Mobile terminal measures to the CSI-RS of different beams and reports corresponding CRI, RI, PMI and CQI.
Preferably, the base station is matched according to the downlink channel condition information to the mobile terminal, including：
The base station is each according to CQI information or SINR information on each wave beam of each mobile terminal reporting
Beam selection matches user, and the pairing user includes a SINR value or CQI value more than the first SINR threshold values or CQI threshold values
Mobile terminal and a SINR value or CQI value are less than the mobile terminal of the 2nd SINR threshold values or CQI threshold values.
Preferably, the base station is matched according to the downlink channel condition information to the mobile terminal, including：
When two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps are larger, then described
Described two mobile terminals are being matched base station corresponding to identical CRI, RI and PMI information in wave beam.
Preferably, the base station is matched according to the downlink channel condition information to the mobile terminal, including：
When CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix correlation is strong corresponding to PMI information,
And CQI or SINR gaps it is larger when, then the base station is to described two mobile terminals mobile terminal reporting wherein
Matched corresponding to PMI in wave beam.
Preferably, the base station is matched according to the downlink channel condition information to the mobile terminal, including：
When the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting is more than another
The RI of individual mobile terminal reporting, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and described wherein one
Part pre-coding matrix correlation in pre-coding matrix corresponding to the PMI of individual mobile terminal reporting is strong, and described two movements
When CQI the or SINR gaps of terminal exceed default disparity threshold, then the base station by described two mobile terminals described another
Matched corresponding to the PMI of one mobile terminal reporting in wave beam.
Preferably, methods described also includes：
One of mobile terminal is except corresponding to the PMI in another mobile terminal reporting in wave beam and institute
State another mobile terminal to carry out outside corresponding multi-user transmission, carried out corresponding to the PMI also reported in this terminal in other wave beams
Single user is transmitted.
Preferably, the base station carries out downlink precoding according to the downlink channel condition information and unpaired message, including：
The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI is by channel coding, scrambling, tune
System mapping and layer mapping, if the remote mobile terminal and the nearly mobile terminal enter in the part wave beam of the nearly mobile terminal
Row multi-user's superposed transmission, then remote mobile terminal described in the base station and the nearly mobile terminal are being superimposed corresponding to wave beam on layer
Power distribution is carried out according to specific power exponentα；
The signal of remote mobile terminal of the base station after power distribution and the signal of nearly mobile terminal pass in identical
Defeated layer carries out carrying out precoding and resource impact again after linear superposition, passes through corresponding antenna port after generation downstream signal
Send.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Preferably, the base station carries out downlink precoding according to the downlink channel condition information and unpaired message, including：
The high nearly mobile terminal of the base station remote mobile terminal and SINR or CQI low to SINR or CQI is compiled by channel
Code, scrambling, modulation mapping, power distribution and layer mapping；
The signal of remote mobile terminal of the base station after power distribution and the signal of nearly mobile terminal pass in identical
Defeated layer carries out carrying out precoding and resource impact again after linear superposition, passes through corresponding antenna port after generation downstream signal
Send.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Second aspect, a kind of device of descending multi-user multi-antenna transmission, described device include：
Sending module, for sending the channel state information reference signals of wave beam forming to mobile terminal；
Receiving module, for receiving the downlink channel condition information of the mobile terminal feedback；
Matching module, for being carried out according to the downlink channel condition information and default pairing rules to the mobile terminal
Pairing；Wherein, the difference that the default pairing rules is included between the SINR numerical value or CQI numerical value of pairing reporting of user exceedes pre-
If difference threshold；Or whole precoding informations or part precoding including matching reporting of user are identical or have strong phase
Guan Xing；
Precoding module, for the downlink data according to the downlink channel condition information with pairing result to pairing user
Multi-user downlink precode is carried out, the downlink precoding is used for pairing user in whole precoding beams, or precoding
Comprising part wave beam in be overlapped transmission.
Preferably, the receiving module, is specifically used for：
If that the sending module is sent is UE-specific Beamformed CSI-RS, receive described mobile whole
Hold and the CSI-RS of different beams is measured and reports corresponding CQI or SINR；
If that the sending module is sent is Cell-specific Beamformed CSI-RS, the movement is received
The CSI-RS of terminal-pair different beams is measured and is reported corresponding CRI, RI, PMI and CQI.
Preferably, the matching module, is specifically used for：
It is each beam selection according to the CQI information or SINR information on each wave beam of each mobile terminal reporting
User is matched, the pairing user includes the mobile terminal of a SINR value or CQI value more than the first SINR threshold values or CQI threshold values
It is less than the mobile terminal of the 2nd SINR threshold values or CQI threshold values with a SINR value or CQI value.
Preferably, the matching module, is specifically used for：
When two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps are larger, then by institute
Two mobile terminals are stated to be matched in wave beam corresponding to identical CRI, RI and PMI information.
Preferably, the matching module, is specifically used for：
When CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix correlation is strong corresponding to PMI information,
And CQI or SINR gaps it is larger when, then to corresponding to described two mobile terminals wherein PMI of a mobile terminal reporting
Matched in wave beam.
Preferably, the matching module, is specifically used for：
When the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting is more than another
The RI of individual mobile terminal reporting, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and described wherein one
Part pre-coding matrix correlation in pre-coding matrix corresponding to the PMI of individual mobile terminal reporting is strong, and described two movements
When CQI the or SINR gaps of terminal exceed default disparity threshold, then by described two mobile terminals in another described movement
Matched corresponding to the PMI that terminal reports in wave beam.
Preferably, described device also includes：
Transport module, for one of mobile terminal except at PMI pairs of another mobile terminal reporting
Carried out in the wave beam answered with another described mobile terminal outside corresponding multi-user transmission, corresponding to the PMI also reported in this terminal
Single user transmission is carried out in other wave beams.
Preferably, the precoding module, is specifically used for：
The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI is by channel coding, scrambling, tune
System mapping and layer mapping, if the remote mobile terminal and the nearly mobile terminal enter in the part wave beam of the nearly mobile terminal
Row multi-user's superposed transmission, then to the remote mobile terminal and the nearly mobile terminal corresponding to superposition wave beam on layer according to spy
Fixed power exponentα carries out power distribution；
The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal are carried out in identical transport layer
Precoding and resource impact are carried out again after linear superposition, and are generated downstream signal and sent afterwards by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Preferably, the precoding module, is specifically used for：
The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI is by channel coding, scrambling, tune
System mapping, power distribution and layer mapping；
The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal are carried out in identical transport layer
Precoding and resource impact are carried out after linear superposition again, is sent after generation downstream signal by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
A kind of method and device of descending multi-user multi-antenna transmission provided in an embodiment of the present invention, base station is to mobile terminal
The channel state information reference signals of wave beam forming are sent, and receive the downlink channel condition information of the mobile terminal feedback；
The mobile terminal is matched according to the downlink channel condition information and default pairing rules the base station；The base station
Downlink precoding is carried out according to the downlink channel condition information and pairing result, so as to realize that different user can be in identical
Carry out data transmission simultaneously on running time-frequency resource and identical wave beam, be greatly improved power system capacity.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the method for descending multi-user multi-antenna transmission provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention；
Fig. 3 is the precoding flow that a kind of two users provided in an embodiment of the present invention carry out matching transmission in same beam
Figure；
Fig. 4 is the schematic flow sheet of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention；
Fig. 6 is the schematic flow sheet of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention；
Fig. 7 is the precoding flow that a kind of two users provided in an embodiment of the present invention carry out matching transmission in the wave beam of part
Schematic diagram；
Fig. 8 is a kind of functional module signal of the device of descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Figure.
Embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The specific embodiment of place description is used only for explaining the embodiment of the present invention, rather than the restriction to the embodiment of the present invention.In addition also
It should be noted that for the ease of describing, the part related to the embodiment of the present invention rather than entire infrastructure are illustrate only in accompanying drawing.
With reference to figure 1, Fig. 1 is that a kind of flow of the method for descending multi-user multi-antenna transmission provided in an embodiment of the present invention is shown
It is intended to.
As shown in figure 1, the method for the descending multi-user multi-antenna transmission includes：
Step 101, base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the shifting
The downlink channel condition information of dynamic terminal feedback；
Preferably, the downlink channel condition information for receiving the mobile terminal feedback, including：
If that the base station is sent is CSI-RS (the UE-specific Beamformed CSI- of UE particular beam figurations
When RS), the base station receives channel condition information measurement pilot tone CSI-RS of the mobile terminal to different beams and measured
And channel quality instruction (Channel Quality Indicator, CQI) or Signal to Interference plus Noise Ratio corresponding to reporting
(Signal to Interference plus Noise Ratio, SINR)；
If that the base station is sent is Cell-specific Beamformed CSI-RS, described in the base station reception
Mobile terminal measures to the CSI-RS of different beams and reports corresponding CSI-RS instruction (CSI-RS Resource
Indicator, CRI), order instruction (rank indication, RI), pre-coding matrix instruction (Precoding Matrix
Indicator, PMI) and CQI.
Step 102, the base station according to the downlink channel condition information and default pairing rules to the mobile terminal
Matched；Wherein, the default pairing rules include pairing reporting of user Signal to Interference plus Noise Ratio SINR numerical value or
Difference between channel quality indicator (CQI) numerical value exceedes preset difference value threshold value；Or the whole including matching reporting of user prelists
Code information or part precoding are identical or have strong correlation；
Step 103, lower line number of the result to pairing user according to the downlink channel condition information and is matched in the base station
According to multi-user downlink precode is carried out, the downlink precoding is used for pairing user in whole precoding beams, or prelists
Transmission is overlapped in the part wave beam that code includes.
A kind of method of descending multi-user multi-antenna transmission provided in an embodiment of the present invention, base station is to mobile terminal send wave
The channel state information reference signals of beam figuration, and receive the downlink channel condition information of the mobile terminal feedback；The base
Stand and the mobile terminal is matched according to the downlink channel condition information and default pairing rules；The base station is according to institute
State downlink channel condition information and pairing result carries out downlink precoding, so as to realize that different user can provide in identical time-frequency
Carry out data transmission simultaneously on source and identical wave beam, be greatly improved power system capacity.
With reference to figure 2, Fig. 2 is the flow of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Schematic diagram.
As shown in Fig. 2 the method for the descending multi-user multi-antenna transmission includes：
Step 201, base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the shifting
The downlink channel condition information of dynamic terminal feedback；
Step 202, the base station is believed according to the CQI information on each wave beam of each mobile terminal reporting or SINR
Breath, user is matched for each beam selection, the pairing user include a SINR value or CQI value more than the first SINR threshold values or
The mobile terminal of CQI threshold values and a SINR value or CQI value are less than the mobile terminal of the 2nd SINR threshold values or CQI threshold values；
Step 203, the high nearly mobile terminal warp of the base station remote mobile terminal and SINR or CQI low to SINR or CQI
Cross channel coding, scrambling, modulation mapping, power distribution and layer mapping；Remote mobile terminal of the base station after power distribution
Signal and nearly mobile terminal signal identical transport layer carry out linear superposition after carry out precoding and resource impact again,
Sent after generation downstream signal by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Wherein, as shown in figure 3, Fig. 3 is a kind of two users provided in an embodiment of the present invention is matched in same beam
The precoding flow chart of transmission.
TBs_F and TBs_N represents remote user (SINR or the relatively low UE of CQI) and nearly user (SINR or CQI respectively in Fig. 3
Higher UE) transmission block.Transmission block of the two users after channel coding, scrambling and modulation mapping maps it by layer respectively
Power distribution is first carried out afterwards, in order to ensure the reliable reception of UE sides, it is desirable to power allocation factor in figure meet 0.6≤α≤
0.95.The signal of two users carries out carrying out precoding and money together after linear superposition in identical transport layer after power distribution
Source maps, and is sent after downstream signal corresponding to generation by the antenna port played chess.
With reference to figure 4, Fig. 4 is the flow of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Schematic diagram.
As shown in figure 4, the method for the descending multi-user multi-antenna transmission includes：
Step 401, base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the shifting
The downlink channel condition information of dynamic terminal feedback；
Step 402, when two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps compared with
Greatly, then the base station is being matched described two mobile terminals in wave beam corresponding to identical CRI, RI and PMI information；
Step 403, the high nearly mobile terminal warp of the base station remote mobile terminal and SINR or CQI low to SINR or CQI
Cross channel coding, scrambling, modulation mapping, power distribution and layer mapping；Remote mobile terminal of the base station after power distribution
Signal and nearly mobile terminal signal identical transport layer carry out linear superposition after carry out precoding and resource impact again,
Sent after generation downstream signal by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Wherein, as shown in figure 3, Fig. 3 is a kind of two users provided in an embodiment of the present invention is matched in same beam
The precoding flow chart of transmission.
TBs_F and TBs_N represents remote user (SINR or the relatively low UE of CQI) and nearly user (SINR or CQI respectively in Fig. 3
Higher UE) transmission block.Transmission block of the two users after channel coding, scrambling and modulation mapping maps it by layer respectively
Power distribution is first carried out afterwards, in order to ensure the reliable reception of UE sides, it is desirable to power allocation factor in figure meet 0.6≤α≤
0.95.The signal of two users carries out carrying out precoding and money together after linear superposition in identical transport layer after power distribution
Source maps, and is sent after downstream signal corresponding to generation by the antenna port played chess.
With reference to figure 5, Fig. 5 is the flow of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Schematic diagram.
As shown in figure 5, the method for the descending multi-user multi-antenna transmission includes：
Step 501, base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the shifting
The downlink channel condition information of dynamic terminal feedback；
Step 502, when CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix phase corresponding to PMI information
Guan Xingqiang, and when CQI or SINR gaps are larger, then the base station is to described two mobile terminals mobile terminal wherein
Matched corresponding to the PMI reported in wave beam；
Step 503, the high nearly mobile terminal warp of the base station remote mobile terminal and SINR or CQI low to SINR or CQI
Cross channel coding, scrambling, modulation mapping, power distribution and layer mapping；Remote mobile terminal of the base station after power distribution
Signal and nearly mobile terminal signal identical transport layer carry out linear superposition after carry out precoding and resource impact again,
Sent after generation downstream signal by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Wherein, as shown in figure 3, Fig. 3 is a kind of two users provided in an embodiment of the present invention is matched in same beam
The precoding flow chart of transmission.
TBs_F and TBs_N represents remote user (SINR or the relatively low UE of CQI) and nearly user (SINR or CQI respectively in Fig. 3
Higher UE) transmission block.Transmission block of the two users after channel coding, scrambling and modulation mapping maps it by layer respectively
Power distribution is first carried out afterwards, in order to ensure the reliable reception of UE sides, it is desirable to power allocation factor in figure meet 0.6≤α≤
0.95.The signal of two users carries out carrying out precoding and money together after linear superposition in identical transport layer after power distribution
Source maps, and is sent after downstream signal corresponding to generation by the antenna port played chess.
With reference to figure 6, Fig. 6 is the flow of the method for another descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Schematic diagram.
As shown in fig. 6, the method for the descending multi-user multi-antenna transmission includes：
Step 601, base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the shifting
The downlink channel condition information of dynamic terminal feedback；
Step 602, when the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting
More than the RI of another mobile terminal reporting, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and institute
The part pre-coding matrix correlation stated in pre-coding matrix corresponding to the PMI of one of mobile terminal reporting is strong and described
When CQI the or SINR gaps of two mobile terminals exceed default disparity threshold, then the base station is by described two mobile terminals
Matched corresponding to PMI in another mobile terminal reporting in wave beam；
Step 603, the high nearly mobile terminal of low SINR or CQI remote mobile terminal and SINR or CQI by channel coding,
Scrambling, modulation mapping and layer mapping, if the remote mobile terminal and the nearly mobile terminal are in the part of the nearly mobile terminal
Multi-user's superposed transmission is carried out in wave beam, then remote mobile terminal described in the base station and the nearly mobile terminal are in superposition wave beam pair
On the layer answered power distribution is carried out according to specific power exponentα；
The signal of remote mobile terminal of the base station after power distribution and the signal of nearly mobile terminal pass in identical
Defeated layer carries out carrying out precoding and resource impact again after linear superposition, passes through corresponding antenna port after generation downstream signal
Send.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Wherein, as shown in fig. 7, Fig. 7 is a kind of two users provided in an embodiment of the present invention is matched in the wave beam of part
The schematic diagram of the precoding flow of transmission.
Specifically, as shown in fig. 7, in figure TBs_F and TBs_N represent respectively remote user (SINR or the relatively low UE of CQI) and
Nearly user (SINR or the higher UE of CQI) transmission block.Transmission block of the two users after channel coding, scrambling and modulation mapping
First pass through layer mapping.Assuming that remote user and nearly user carry out multi-user's superposed transmission in the part wave beam of nearly user.It is then dual-purpose
Family is first carrying out power distribution corresponding to superposition wave beam on layer, for the purposes of ensureing the reliable reception of UE sides, it is desirable to the work(in figure
Rate distribution factor meets 0.6≤α≤0.95.The signal of two users carries out linear superposition in identical transport layer after power distribution
Carry out precoding and resource impact together afterwards, sent out after downstream signal corresponding to generation by corresponding antenna port
Go.For the signal in nearly user other wave beam respective layers then directly progress precoding and resource impact after layer mapping, it
Sent afterwards after downstream signal corresponding to regeneration by corresponding antenna port.
Preferably, methods described also includes：
One of mobile terminal is except corresponding to the PMI in another mobile terminal reporting in wave beam and institute
State another mobile terminal to carry out outside corresponding multi-user transmission, carried out corresponding to the PMI also reported in this terminal in other wave beams
Single user is transmitted.
With reference to figure 8, Fig. 8 is a kind of function mould of the device of descending multi-user multi-antenna transmission provided in an embodiment of the present invention
Block schematic diagram.
As shown in figure 8, described device includes：
Sending module 801, for sending the channel state information reference signals of wave beam forming to mobile terminal；
Receiving module 802, for receiving the downlink channel condition information of the mobile terminal feedback；
Matching module 803, for according to the downlink channel condition information and default pairing rules to the mobile terminal
Matched；Wherein, the difference that the default pairing rules is included between the SINR numerical value or CQI numerical value of pairing reporting of user surpasses
Cross preset difference value threshold value；Or whole precoding informations or part precoding including matching reporting of user are identical or have
Strong correlation；
Precoding module 804, for according to the downlink channel condition information and pairing result to pairing user it is descending
Data carry out multi-user downlink precode, and the downlink precoding is used for pairing user in whole precoding beams, or in advance
Encode in the part wave beam included and be overlapped transmission.
Preferably, the receiving module 802, is specifically used for：
If that the sending module is sent is UE-specific Beamformed CSI-RS, receive described mobile whole
Hold and the CSI-RS of different beams is measured and reports corresponding CQI or SINR；
If that the sending module is sent is Cell-specific Beamformed CSI-RS, the movement is received
The CSI-RS of terminal-pair different beams is measured and is reported corresponding CRI, RI, PMI and CQI.
Preferably, the matching module 803, is specifically used for：
It is each beam selection according to the CQI information or SINR information on each wave beam of each mobile terminal reporting
User is matched, the pairing user includes the mobile terminal of a SINR value or CQI value more than the first SINR threshold values or CQI threshold values
It is less than the mobile terminal of the 2nd SINR threshold values or CQI threshold values with a SINR value or CQI value.
Preferably, the matching module 803, is specifically used for：
When two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps are larger, then by institute
Two mobile terminals are stated to be matched in wave beam corresponding to identical CRI, RI and PMI information.
Preferably, the matching module 803, is specifically used for：
When CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix correlation is strong corresponding to PMI information,
And CQI or SINR gaps it is larger when, then to corresponding to described two mobile terminals wherein PMI of a mobile terminal reporting
Matched in wave beam.
Preferably, the matching module 803, is specifically used for：
When the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting is more than another
The RI of individual mobile terminal reporting, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and described wherein one
Part pre-coding matrix correlation in pre-coding matrix corresponding to the PMI of individual mobile terminal reporting is strong, and described two movements
When CQI the or SINR gaps of terminal exceed default disparity threshold, then by described two mobile terminals in another described movement
Matched corresponding to the PMI that terminal reports in wave beam.
Preferably, described device also includes：
Transport module, for one of mobile terminal except at PMI pairs of another mobile terminal reporting
Carried out in the wave beam answered with another described mobile terminal outside corresponding multi-user transmission, corresponding to the PMI also reported in this terminal
Single user transmission is carried out in other wave beams.
Preferably, the precoding module 804, is specifically used for：
The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI is by channel coding, scrambling, tune
System mapping and layer mapping, if the remote mobile terminal and the nearly mobile terminal enter in the part wave beam of the nearly mobile terminal
Row multi-user's superposed transmission, then to the remote mobile terminal and the nearly mobile terminal corresponding to superposition wave beam on layer according to spy
Fixed power exponentα carries out power distribution；
The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal are carried out in identical transport layer
Precoding and resource impact are carried out again after linear superposition, and are generated downstream signal and sent afterwards by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
Preferably, the precoding module 804, is specifically used for：
The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI is by channel coding, scrambling, tune
System mapping, power distribution and layer mapping；
The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal are carried out in identical transport layer
Precoding and resource impact are carried out after linear superposition again, is sent after generation downstream signal by corresponding antenna port.
Preferably, the power allocation factor meets 0.6≤α≤0.95.
A kind of device of descending multi-user multi-antenna transmission provided in an embodiment of the present invention, base station is to mobile terminal send wave
The channel state information reference signals of beam figuration, and receive the downlink channel condition information of the mobile terminal feedback；The base
Stand and the mobile terminal is matched according to the downlink channel condition information and default pairing rules；The base station is according to institute
State downlink channel condition information and pairing result carries out downlink precoding, so as to realize that different user can provide in identical time-frequency
Carry out data transmission simultaneously on source and identical wave beam, be greatly improved power system capacity.
The technical principle of the embodiment of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain this
The principle of inventive embodiments, and the limitation to protection domain of the embodiment of the present invention can not be construed in any way.Based on herein
Explanation, those skilled in the art, which would not require any inventive effort, can associate the other specific of the embodiment of the present invention
Embodiment, these modes are fallen within the protection domain of the embodiment of the present invention.
Claims (22)
- A kind of 1. method of descending multi-user multi-antenna transmission, it is characterised in that methods described includes：Base station sends the channel state information reference signals of wave beam forming to mobile terminal, and receives the mobile terminal feedback Downlink channel condition information；The mobile terminal is matched according to the downlink channel condition information and default pairing rules the base station；Its In, the default pairing rules includes Signal to Interference plus Noise Ratio SINR numerical value or the channel quality instruction of pairing reporting of user Difference between CQI numerical value exceedes preset difference value threshold value；Or including matching whole precoding informations or the part of reporting of user Precoding is identical or has strong correlation；The base station carries out multi-user according to the downlink channel condition information and pairing result to the downlink data for matching user Downlink precoding, the downlink precoding is used for pairing user in whole precoding beams, or the part that precoding includes Transmission is overlapped in wave beam.
- 2. according to the method for claim 1, it is characterised in that the down channel shape for receiving the mobile terminal feedback State information, including：If that the base station is sent is UE-specific Beamformed CSI-RS, the base station receives described mobile whole Hold and the CSI-RS of different beams is measured and reports corresponding CQI or SINR；If that the base station is sent is Cell-specific Beamformed CSI-RS, the base station receives the movement The CSI-RS of terminal-pair different beams is measured and is reported corresponding channel quality instruction CRI, order instruction RI, pre-coding matrix Indicate PMI and CQI.
- 3. according to the method for claim 2, it is characterised in that the base station is according to the downlink channel condition information to institute Mobile terminal is stated to be matched, including：The base station is each wave beam according to CQI information or SINR information on each wave beam of each mobile terminal reporting Selection pairing user, the pairing user include the movement of a SINR value or CQI value more than the first SINR threshold values or CQI threshold values Terminal and a SINR value or CQI value are less than the mobile terminal of the 2nd SINR threshold values or CQI threshold values.
- 4. according to the method for claim 2, it is characterised in that the base station is according to the downlink channel condition information to institute Mobile terminal is stated to be matched, including：When two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps are larger, then the base station Described two mobile terminals are being matched corresponding to identical CRI, RI and PMI information in wave beam.
- 5. according to the method for claim 2, it is characterised in that the base station is according to the downlink channel condition information to institute Mobile terminal is stated to be matched, including：When CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix correlation is strong corresponding to PMI information, and CQI Or SINR gaps it is larger when, then PMI pairs to described two mobile terminals mobile terminal reporting wherein of the base station Matched in the wave beam answered.
- 6. according to the method for claim 2, it is characterised in that the base station is according to the downlink channel condition information to institute Mobile terminal is stated to be matched, including：When the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting moves more than another The RI that dynamic terminal reports, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and one of shifting Part pre-coding matrix correlation in pre-coding matrix corresponding to the PMI that dynamic terminal reports is strong, and described two mobile terminals CQI or SINR gaps when exceeding default disparity threshold, then the base station by described two mobile terminals it is described another Matched corresponding to the PMI of mobile terminal reporting in wave beam.
- 7. according to the method for claim 6, it is characterised in that methods described also includes：One of mobile terminal except corresponding to the PMI in another mobile terminal reporting in wave beam with it is described another One mobile terminal is carried out outside corresponding multi-user transmission, is carried out corresponding to the PMI also reported in this terminal in other wave beams alone Transmit at family.
- 8. the method according to claim 6 or 7, it is characterised in that the base station is according to the downlink channel condition information Downlink precoding is carried out with unpaired message, including：The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI reflects by channel coding, scrambling, modulation Penetrate and mapped with layer, if the progress in the part wave beam of the nearly mobile terminal of the remote mobile terminal and the nearly mobile terminal is more User's superposed transmission, then the base station the remote mobile terminal and the nearly mobile terminal are being pressed corresponding to superposition wave beam on layer Power distribution is carried out according to specific power exponentα；The signal of remote mobile terminal of the base station after power distribution and the signal of nearly mobile terminal are in identical transport layer Carry out carrying out precoding and resource impact again after linear superposition, sent out after generation downstream signal by corresponding antenna port Send.
- 9. according to the method for claim 8, it is characterised in that the power allocation factor meets 0.6≤α≤0.95.
- 10. according to the method described in claim 1 to 5 any one, it is characterised in that the base station is according to the down channel Status information and unpaired message carry out downlink precoding, including：The high nearly mobile terminal of the base station remote mobile terminal and SINR or CQI low to SINR or CQI passes through channel coding, added Disturb, modulate mapping, power distribution and layer mapping；The signal of remote mobile terminal of the base station after power distribution and the signal of nearly mobile terminal are in identical transport layer Carry out carrying out precoding and resource impact again after linear superposition, sent out after generation downstream signal by corresponding antenna port Send.
- 11. according to the method for claim 10, it is characterised in that the power allocation factor meets 0.6≤α≤0.95.
- 12. a kind of device of descending multi-user multi-antenna transmission, it is characterised in that described device includes：Sending module, for sending the channel state information reference signals of wave beam forming to mobile terminal；Receiving module, for receiving the downlink channel condition information of the mobile terminal feedback；Matching module, for being matched somebody with somebody according to the downlink channel condition information and default pairing rules to the mobile terminal It is right；Wherein, the difference that the default pairing rules is included between the SINR numerical value or CQI numerical value of pairing reporting of user exceedes default Difference threshold；Or whole precoding informations or part precoding including matching reporting of user are identical or have strong correlation Property；Precoding module, for being carried out according to the downlink channel condition information and pairing result to the downlink data for matching user Multi-user downlink precode, the downlink precoding is used for pairing user in whole precoding beams, or precoding includes Part wave beam in be overlapped transmission.
- 13. device according to claim 12, it is characterised in that the receiving module, be specifically used for：If that the sending module is sent is UE-specific Beamformed CSI-RS, the mobile terminal pair is received The CSI-RS of different beams is measured and is reported corresponding CQI or SINR；If that the sending module is sent is Cell-specific Beamformed CSI-RS, the mobile terminal is received The CSI-RS of different beams is measured and reports corresponding CRI, RI, PMI and CQI.
- 14. device according to claim 13, it is characterised in that the matching module, be specifically used for：According to the CQI information or SINR information on each wave beam of each mobile terminal reporting, matched for each beam selection User, the pairing user include a SINR value or CQI value more than the first SINR threshold values or the mobile terminal of CQI threshold values and one The mobile terminal of individual SINR value or CQI value less than the 2nd SINR threshold values or CQI threshold values.
- 15. device according to claim 13, it is characterised in that the matching module, be specifically used for：When two mobile terminal reporting identical CRI, RI and PMI information, and CQI or SINR gaps are larger, then by described two Individual mobile terminal is being matched corresponding to identical CRI, RI and PMI information in wave beam.
- 16. device according to claim 13, it is characterised in that the matching module, be specifically used for：When CRI with the RI information of two mobile terminal reportings is identical, pre-coding matrix correlation is strong corresponding to PMI information, and CQI Or SINR gaps it is larger when, then to described two mobile terminals wave beam corresponding to the PMI of a mobile terminal reporting wherein Inside matched.
- 17. device according to claim 13, it is characterised in that the matching module, be specifically used for：When the CRI of two mobile terminal reportings is identical, RI is different, if the RI of one of mobile terminal reporting moves more than another The RI that dynamic terminal reports, and pre-coding matrix corresponding to the PMI of another mobile terminal reporting and one of shifting Part pre-coding matrix correlation in pre-coding matrix corresponding to the PMI that dynamic terminal reports is strong, and described two mobile terminals CQI or SINR gaps when exceeding default disparity threshold, then by described two mobile terminals in another described mobile terminal Matched corresponding to the PMI reported in wave beam.
- 18. device according to claim 17, it is characterised in that described device also includes：Transport module, for one of mobile terminal except corresponding to the PMI in another mobile terminal reporting Is carried out with another described mobile terminal outside corresponding multi-user transmission in wave beam, corresponding to the PMI also reported in this terminal other Single user transmission is carried out in wave beam.
- 19. the device according to claim 17 or 18, it is characterised in that the precoding module, be specifically used for：The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI reflects by channel coding, scrambling, modulation Penetrate and mapped with layer, if the progress in the part wave beam of the nearly mobile terminal of the remote mobile terminal and the nearly mobile terminal is more User's superposed transmission, then to the remote mobile terminal and the nearly mobile terminal corresponding to superposition wave beam on layer according to specific Power exponentα carries out power distribution；The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal carry out linear in identical transport layer Precoding and resource impact are carried out again after superposition, and are generated downstream signal and sent afterwards by corresponding antenna port.
- 20. device according to claim 19, it is characterised in that the power allocation factor meets 0.6≤α≤0.95.
- 21. according to the device described in claim 12 to 16 any one, it is characterised in that the precoding module is specific to use In：The high nearly mobile terminal of remote mobile terminal and SINR or CQI low SINR or CQI reflects by channel coding, scrambling, modulation Penetrate, the mapping of power distribution and layer；The signal of remote mobile terminal after power distribution and the signal of nearly mobile terminal carry out linear in identical transport layer Precoding and resource impact are carried out after superposition again, is sent after generation downstream signal by corresponding antenna port.
- 22. device according to claim 21, it is characterised in that the power allocation factor meets 0.6≤α≤0.95.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610648995.1A CN107733491A (en) | 2016-08-09 | 2016-08-09 | A kind of method and device of descending multi-user multi-antenna transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610648995.1A CN107733491A (en) | 2016-08-09 | 2016-08-09 | A kind of method and device of descending multi-user multi-antenna transmission |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019178867A1 (en) * | 2018-03-23 | 2019-09-26 | Lenovo (Beijing) Limited | Method and apparatus for non-codebook based ul transmission |
| WO2021012784A1 (en) * | 2019-07-19 | 2021-01-28 | 中兴通讯股份有限公司 | Method and apparatus for feeding back layer information, method and apparatus for receiving layer information, communication node and medium |
| CN113810089A (en) * | 2020-06-11 | 2021-12-17 | 华为技术有限公司 | Communication method and device |
| CN115038188A (en) * | 2022-07-13 | 2022-09-09 | 中国联合网络通信集团有限公司 | Resource scheduling method, base station device and storage medium |
| CN115243378A (en) * | 2022-07-20 | 2022-10-25 | 中国联合网络通信集团有限公司 | Resource allocation method and device, electronic equipment and storage medium |
-
2016
- 2016-08-09 CN CN201610648995.1A patent/CN107733491A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019178867A1 (en) * | 2018-03-23 | 2019-09-26 | Lenovo (Beijing) Limited | Method and apparatus for non-codebook based ul transmission |
| CN111819878A (en) * | 2018-03-23 | 2020-10-23 | 联想(北京)有限公司 | Non-codebook based UL transmission method and device |
| CN111819878B (en) * | 2018-03-23 | 2022-10-18 | 联想(北京)有限公司 | Non-codebook based UL transmission method and device |
| US11909480B2 (en) | 2018-03-23 | 2024-02-20 | Lenovo (Beijing) Limited | Method and apparatus for non-codebook based UL transmission |
| WO2021012784A1 (en) * | 2019-07-19 | 2021-01-28 | 中兴通讯股份有限公司 | Method and apparatus for feeding back layer information, method and apparatus for receiving layer information, communication node and medium |
| CN113810089A (en) * | 2020-06-11 | 2021-12-17 | 华为技术有限公司 | Communication method and device |
| CN113810089B (en) * | 2020-06-11 | 2023-09-29 | 华为技术有限公司 | Communication method and device |
| CN115038188A (en) * | 2022-07-13 | 2022-09-09 | 中国联合网络通信集团有限公司 | Resource scheduling method, base station device and storage medium |
| CN115243378A (en) * | 2022-07-20 | 2022-10-25 | 中国联合网络通信集团有限公司 | Resource allocation method and device, electronic equipment and storage medium |
| CN115243378B (en) * | 2022-07-20 | 2024-06-07 | 中国联合网络通信集团有限公司 | Resource allocation method and device, electronic equipment and storage medium |
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