CN108512578A - A kind of channel state information feedback method, device and system - Google Patents

A kind of channel state information feedback method, device and system Download PDF

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Publication number
CN108512578A
CN108512578A CN201710105806.0A CN201710105806A CN108512578A CN 108512578 A CN108512578 A CN 108512578A CN 201710105806 A CN201710105806 A CN 201710105806A CN 108512578 A CN108512578 A CN 108512578A
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China
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user
state information
channel state
target terminal
cqi
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CN201710105806.0A
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佘锋
梁亚超
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Sanechips Technology Co Ltd
Shenzhen ZTE Microelectronics Technology Co Ltd
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Shenzhen ZTE Microelectronics Technology Co Ltd
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Priority to CN201710105806.0A priority Critical patent/CN108512578A/en
Priority to PCT/CN2017/099357 priority patent/WO2018153045A1/en
Publication of CN108512578A publication Critical patent/CN108512578A/en
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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
    • 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
    • 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
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

The invention discloses a kind of channel state information feedback methods, including：Base station sends preactivate signaling to target terminal user, to notify the target terminal user to prepare activation multi-user's superposed transmission (MUST)；The base station sends scheduling indication signaling to the target terminal user, to indicate the target terminal user transmitting channel state information；After the preactivate information and the scheduling indication signaling are received, channel state information is determined according to the preactivate signaling and the scheduling indication signaling by the target terminal user and feeds back to the base station；The base station receives the channel state information of the target terminal user feedback, determined whether to activate the MUST according to the channel state information, when determining activation multi-user's superposed transmission, the transmission mode of the MUST is selected according to the channel state information.The invention also discloses a kind of information feedback device and system.

Description

A kind of channel state information feedback method, device and system
Technical field
The present invention relates to wireless access technology more particularly to a kind of channel state information feedback method, device and system.
Background technology
In Long Term Evolution upgrade version (LTE-A, Long Term Evolution Advanced) system and the 5th generation Mobile communication technology (5G, 5th-Generation) is newly eated dishes without rice or wine in design, and nonopiate access has become a kind of important wireless Access scheme, while in third generation partner program (3GPP, 3rd Generation Partnership Project) R14 In the standardization of version (Rel-14), nonopiate access has formally been determined as a kind of important novel access way.
In LTE-A, multi-user's superposed transmission (MUST, Multiple Users has been supported at present Superposition Transmission) scheme.As shown in Figure 1, in MUST transmission plans, base station side can be identical Dispatch two user terminals (UE, User Equipment) in time-frequency domain resources, i.e., the data of two scheduled UE will be Be superimposed transmission on identical running time-frequency resource.In terms of data separating, distal end UE and proximal end UE are transparent, i.e. distal end UE is not Know any information of proximal end UE.Distal end UE weakens the interference of proximal end UE by large-scale decline, to smoothly demodulate；Proximal end The transmission information realization interference that UE will then be based on the distal end UE of base station (eNB) instruction is eliminated.
In MUST transmission plans, two UE are scheduled on identical running time-frequency resource.As shown in Figure 1, UE1 and UE2 points It is not referred to as proximal end UE and distal end UE.In the scheduling of proximal end UE and distal end UE, base station be proximal end UE, i.e. UE1 configuration distal end UE, That is the transmission information of UE2, the transmission information are used for that proximal end UE is helped to be properly received the data of itself.And for distal end UE, base The information of proximal end UE need not generally be configured by standing, i.e. proximal end UE is transparent to distal end UE.
Currently, in terms of MUST transmission mechanisms, there are many transmission mechanism and parameter configuration and deposits, specifically include following three Aspect：
First, in terms of transmission mode, there are three types of transmission modes by MUST：
Mode 1：UE1 (proximal end UE) and UE2 (distal end UE) is based on identical pre-coding scheme superposed transmission；
Mode 2：UE1 (proximal end UE) and UE2 (distal end UE) is based on diversity scheme (identical precoding) superposed transmission；
Mode 3：UE1 (proximal end UE) is from UE2 (distal end UE) based on different pre-coding scheme superposed transmissions.
Second, MUST transmission also support distal end UE to use different modulation mode combinations from proximal end UE, when distal end UE is used Quadrature phase shift keying (QPSK, Quadrature Phase Shift Keyin) modulation system, and proximal end UE can select QPSK, Quadrature amplitude modulation (16QAM, Quadrature Amplitude Modulation), phase quadrature amplitude modulation (64QAM, Quadrature Amplitude Modulation) three kinds of modulation systems；
I.e. for proximal end UE and distal end UE, the modulation mode combination that can be supported includes following several：(QPSK, QPSK), (16QAM, QPSK), (64QAM, QPSK).
Third, between proximal end UE and distal end UE also have multiple power than configuration, to realize different combination planispheres Modulation.
The description of transmission mechanism and parameter configuration in terms of based on three above, to implement MUST transmission plans, eNB needs The parameter of configuration include transmission mode (mode 1, mode 2, mode 3), modulation mode combination ((QPSK, QPSK), (16QAM, QPSK), (64QAM, QPSK)) and proximal end UE and distal end UE between power ratio.
In order to obtain good MUST transmission performances, the above parameter of the necessary reasonable dispositions of eNB, and to realize the reasonable of parameter Configuration, eNB need to be based on accurate channel state information, this just needs the more accurate and comprehensive channel status of proximal end UE feedback ratios Information.
Meanwhile in MUST transmission processes, the channel condition of proximal end UE and distal end UE can constantly change.Therefore, eNB The variation of channel must be understood in time, and the information based on channel variation is configured flexibly MUST configured transmissions and pairing user, It could realize the optimization of system performance.
If the channel state information of UE feedbacks is inaccurate, the MUST parameters that eNB is configured will be with the channel of UE not Matching, this will cause system performance to decline.Therefore, in the scheduling and transmission of MUST, the channel status letter of proximal end UE feedbacks The accuracy of breath with it is comprehensive be the key that ensure MUST scheduling with transmission performance optimization.
And in current LTE feedback mechanisms, agreement only support single user multi-input multi-output system (MIMO, Multiple-Input Multiple-Output) feedback.In the feedback mechanism of Single User MIMO, the channel status of UE feedbacks Information (CSI, Channel State Information) be only capable of providing single UE pre-coding matrix instruction (PMI, Precoding Matrix Indicator), channel quality instruction (CQI, Channel Quality Indicator), order refer to Show (RI, rank indication).For MUST, the channel state information of single user is not comprehensive, these information are not yet It is enough to provide more accurately channel state information for eNB, this results in eNB that can not also be based on the progress of these channel state informations Accurate MUST scheduling.
Invention content
To solve existing technical problem, a kind of channel state information feedback method of offer of the embodiment of the present invention, dress It sets and system, solves feedback system existing in the prior art and be not suitable for the channel status that MUST transmission causes user terminal to feed back The problem of information is inaccurate, and base station cannot accurately implement MUST scheduling.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
An embodiment of the present invention provides a kind of channel state information feedback method, the method includes：
Base station sends preactivate signaling to target terminal user, to notify the target terminal user to prepare activation MUST；The target terminal user be base station dispatch in identical time-frequency domain resources in two user terminals apart from base station side closely User terminal；
The base station sends scheduling indication signaling to the target terminal user, to indicate that the target terminal user passes Defeated channel state information；After the preactivate information and the scheduling indication signaling are received, by the target terminal user root Channel state information is determined according to the preactivate signaling and the scheduling indication signaling and feeds back to the base station；
The base station receives the channel state information of the target terminal user feedback, is believed according to the channel status It ceases and determines whether to activate the MUST, when determining the activation MUST, select the MUST's according to the channel state information Transmission mode.
In said program, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission.
It is described to be determined whether to activate multi-user's superposed transmission according to the channel state information in said program, packet It includes：
Throughput is determined according to the channel state information of feedback, judges to activate the described of multi-user's superposed transmission Whether throughput activates the multi-user superposed transmission described higher than the throughput described in un-activation when multi-user's superposed transmission Throughput is higher than the throughput described in un-activation when multi-user's superposed transmission, it is determined that activates multi-user's superposed transmission.
In said program, the transmission mode of selection multi-user's superposed transmission, including：
According to the channel state information, determine that the target terminal user and the distal end when different transmission modes are used The performance of family terminal selects the transmission mode when best performance of the target terminal user and the distant end user terminal.
An embodiment of the present invention provides a kind of channel state information feedback method, the method includes：
Base station sends preactivate signaling to target terminal user, to notify the target terminal user to prepare activation MUST；
The base station sends scheduling indication signaling to the target terminal user, to indicate that the target terminal user passes Defeated channel state information；
After the target terminal user receives preactivate information and the scheduling indication signaling, according to the preactivate signaling Channel state information is determined with the scheduling indication signaling and feeds back to the base station；
The base station receives the channel state information of the target terminal user feedback, is believed according to the channel status It ceases and determines whether to activate the MUST, when determining the activation MUST, select the MUST's according to the channel state information Transmission mode.
In said program, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission；
The target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling, Including：
The target terminal user selects the pre-coding matrix of the target terminal user and remote according to the transmission mode The pre-coding matrix of end user terminal, according to the power ratio power ratio selected to use of the candidate；
After the target terminal user measures acquisition channel estimation value and noise power, in conjunction with the power ratio, the mesh The pre-coding matrix of the pre-coding matrix and distant end user terminal of user terminal is marked, calculates and obtains at least one CQI.
In said program, the scheduling indicates information, further includes：Physical uplink control channel physical uplink link control Channel (PUCCH, Physical Uplink Control Channel) processed or Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel) resource location；
The channel state information further includes：PMI；
The target terminal user gives information feedback to the base station, including：
According at least one CQI of the number of extracted of the CQI as the channel state information；Alternatively, according to the CQI At least one CQI of number of extracted, and according at least one PMI of the number of extracted of the PMI, using the CQI of extraction and PMI as The channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to institute The period for transmitting the CQI is stated, feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
An embodiment of the present invention provides a kind of information feedback device, described device includes：First sending module, Second sending module and determining module；Wherein,
First sending module, for sending preactivate signaling to target terminal user, to notify the target to use Family terminal prepares activation MUST；The target terminal user is that base station is dispatched in identical time-frequency domain resources in two user terminals The user terminal close apart from base station side；
Second sending module, it is described to indicate for sending scheduling indication signaling to the target terminal user Target terminal user transmitting channel state information；After the preactivate information and the scheduling indication signaling are received, by described Target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling and feeds back to described Base station；
The determining module, the channel state information for receiving the target terminal user feedback, according to the letter Channel state information determines whether to activate the MUST, and when determining the activation MUST, institute is selected according to the channel state information State the transmission mode of MUST.
In said program, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission.
In said program, the determining module is specifically used for：It is handled up according to the determination of the channel state information of feedback Rate, when judging that the throughput of multi-user's superposed transmission is activated whether to be higher than multi-user's superposed transmission described in un-activation Throughput activates the throughput of multi-user's superposed transmission higher than handling up when multi-user's superposed transmission described in un-activation Rate, it is determined that activate multi-user's superposed transmission.
In said program, the determining module is specifically used for：According to the channel state information, different transmission sides are determined The performance of the target terminal user and the distant end user terminal when formula, selects the target terminal user and the distal end The transmission mode when best performance of user terminal.
An embodiment of the present invention provides a kind of information feedback system, the system, including：Base station and target are used Family terminal；Wherein,
The base station, for sending preactivate signaling to target terminal user, to notify that the target terminal user is accurate Standby activation MUST, the target terminal user are that base station is dispatched in two user terminals in identical time-frequency domain resources apart from base station The close user terminal in side；Scheduling indication signaling is sent to the target terminal user, to indicate that the target terminal user passes Defeated channel state information；And the channel state information of the target terminal user feedback is received, according to the channel status Information determines whether to activate the MUST, and when determining the activation MUST, the MUST is selected according to the channel state information Transmission mode；
The target terminal user is used for after receiving preactivate information and the scheduling indication signaling, according to described pre- Activation signaling and the scheduling indication signaling determine channel state information and feed back to the base station.
In said program, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission；
The target terminal user, is specifically used for：Prelisting for the target terminal user is selected according to the transmission mode The pre-coding matrix of code matrix and distant end user terminal, according to the power ratio power ratio selected to use of the candidate；Measurement obtains After obtaining channel estimation value and noise power, used in conjunction with the power ratio, the pre-coding matrix of the target terminal user and distal end The pre-coding matrix of family terminal calculates and obtains at least one CQI.
In said program, the scheduling indicates information, further includes：The resource location of PUCCH or PUSCH；
The channel state information further includes：PMI；
The target terminal user, is specifically used for：According at least one CQI of the number of extracted of the CQI as the letter Channel state information；Alternatively, according at least one CQI of number of extracted of the CQI, and at least according to the number of extracted of the PMI One PMI, using the CQI of extraction and PMI as the channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to institute The period for transmitting the CQI is stated, feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
Channel state information feedback method that the embodiment of the present invention is provided, device and system, base station is to target user's end End sends preactivate signaling, to notify the target terminal user to prepare activation MUST；The target terminal user is base station User terminal close apart from base station side in two user terminals is dispatched in identical time-frequency domain resources；The base station is to the target User terminal sends scheduling indication signaling, to indicate the target terminal user transmitting channel state information；The preactivate After information and the scheduling indication signaling are received, by the target terminal user according to the preactivate signaling and the scheduling Indication signaling determines channel state information and feeds back to the base station；The base station receives the institute of the target terminal user feedback Channel state information is stated, is determined whether to activate the MUST according to the channel state information, determines and activate the multi-user folded When adding transmission, the transmission mode of the MUST is selected according to the channel state information.Method provided in an embodiment of the present invention, dress It sets and system, overcomes the channel matter that feedback system present in existing LTE-A is not suitable for MUST transmission, and then UE is caused to feed back The problem of amount information is not accurate enough, base station cannot accurately implement MUST scheduling, system performance declines；Target UE is improved by a relatively large margin The channel state information of feedback it is comprehensive, provide more accurate channel state information for base station.Based on more accurate letter Channel state information, base station can more accurately implement matching for distant end user terminal in MUST transmission and target terminal user It is right, it is compared the configuration of the selection and configured transmission of the MUST transmission modes of optimization, to obtain preferable system performance.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of MUST Transmission systems；
Fig. 2 is a kind of flow diagram of channel state information feedback method provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of information feedback device provided in an embodiment of the present invention；
Fig. 4 is the flow diagram of another channel state information feedback method provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of information feedback system provided in an embodiment of the present invention；
Fig. 6 is the flow diagram of another channel state information feedback method provided in an embodiment of the present invention.
Specific implementation mode
In various embodiments of the present invention, base station sends preactivate signaling to target terminal user, described to notify Target terminal user prepares activation MUST；The base station sends scheduling indication signaling to the target terminal user, to indicate The target terminal user transmitting channel state information；After the preactivate information and the scheduling indication signaling are received, by The target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling and feeds back to The base station；The base station receives the channel state information of the target terminal user feedback, according to the channel status Information determines whether to activate the MUST, when determining activation multi-user's superposed transmission, be selected according to the channel state information Select the transmission mode of the MUST.
With reference to embodiment, the present invention is further described in more detail.
Fig. 2 is a kind of flow diagram of channel state information feedback method provided in an embodiment of the present invention；Such as Fig. 2 institutes Show, the method, including：
Step 101：ENB sends the preactivate signaling of MUST to target UE, to notify the target terminal user to prepare Activate MUST；
Here, the target terminal user is that base station is dispatched in two user terminals in identical time-frequency domain resources apart from base It stands the close user terminal in side；
User terminal remote apart from base station side in two user terminals is dispatched in base station in identical time-frequency domain resources, referred to here as For distant end user terminal.
The base station, for regulation goal UE and distal end UE；The base station based on the channel state information acquired in itself, The selection of MUST transmission modes and the pairing of MUST user can be executed.
The preactivate signaling is used to indicate UE and prepares activation MUST operations；Here, base station is by the preactivate signaling of MUST It is sent to the target UE, for notifying the target UE to prepare activation MUST operations.Here, the preactivate signaling can adopt With wireless heterogeneous networks (RRC, Radio Resource Control) signaling.
The corresponding cell (IE) of the preactivate signaling can be placed on PhysicalConfigDedicated with Under PhysicalConfigDedicatedSCell-r10, to indicating user terminal preactivate MUST.
Step 102：The base station sends scheduling indication signaling (DCI, Downlink to the target terminal user Control Information), to indicate the target terminal user transmitting channel state information；
After the preactivate information and the scheduling indication signaling are received, by the target terminal user according to described pre- Activation signaling and the scheduling indication signaling determine channel state information and feed back to the base station.
Specifically, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling may include：Transmit the period of CQI, the quantity of CQI, PMI Quantity, the transmission mode of CQI, candidate power ratio and modulation mode combination；
Here, the power ratio of the candidate is the power ratio of the distant end user terminal and the target terminal user.
Here, the transmission mode of the CQI, including：Mode 1 (case1), mode 2 (case2), mode 3 (case3)；Its In,
case1：Target UE and distal end UE is based on identical pre-coding scheme superposed transmission；
case2：Target UE and distal end UE is based on identical precoding superposed transmission；
case3：Target UE is from distal end UE based on different pre-coding scheme superposed transmissions.
Here, distal end UE uses different modulation mode combinations from target UE.It is described for target UE and distal end UE Modulation mode combination may include：(QPSK, QPSK), (16QAM, QPSK), (64QAM, QPSK).
Specifically, the preactivate signaling can be realized by RRC signaling, and the mode for configuring the preactivate signaling is as follows：
must-Enabled-r14 ENUMERATED{true}
Explanation：True indicates preactivate MUST；
must-Case ENUMERATED{0 1 2}
Explanation：0,1,2 respectively indicate MUST CQI transmission mode case1, case2, case3；
must-CQI ENUMERATED{0 1 2 3}
Explanation：0,1,2,3 be the CQI quantity fed back；
must-Powerratio ENUMERATED{0 1 2 3 4 5}
Explanation：0,1,2,3,4,5 be respectively power ratio instruction, correspond to different power ratio ratio respectively；
must-Modumod ENUMERATED{0 1 2}
Explanation：0,1,2 be respectively modulation mode combination, correspond to respectively (QPSK, QPSK) (16QAM, QPSK) (64QAM, QPSK)
must-Pmi ENUMERATED{0 1 2 3}
Explanation：0,1,2,3 be feedback PMI quantity instruction, correspond to different PMI quantity respectively.
It transmits, can also be included in described it should be noted that information above may be embodied in the preactivate signaling It transmits, is not construed as limiting in scheduling indication signaling.
Specifically, the scheduling indication signaling is multiple to send feedback to the target UE as downlink control instruction The instruction of CQI.
Here, the uplink feedback type of PMI/RI/CQI is divided into following two：
Periodic feedback, the feedback being mainly carried on PUCCH；
Non-periodic feedback, the feedback being carried on PUSCH.
The scheduling indication signaling further includes：The resource location (running time-frequency resource) of PUCCH or PUSCH；
Here, the base station notifies the target UE in the resource of specified PUCCH or PUSCH by dispatching indication signaling Position feedback multiple CQI, PMI.
For example, shown in the configuration mode of the resource location of the PUCCH such as following formula (1)：
nPUCCH=nCCE+N(1) (1)
Wherein, nPUCCHThe resource location for being CQI on PUCCH, nCCELetter is controlled for the physical down of scheduled distal end UE Control channel unit (CCE, the Control Channel in road (PDCCH, Physical Downlink Control Channel) Element) number, N(1)For the parameter of high level configuration.
Specifically, the principle based on MUST, due to being superimposed interference UE on identical running time-frequency resource.Two UE (i.e. mesh Mark UE and distal end UE) data transmission based on different power ratios, the power ratio of two UE can refer to Current protocol The regulation of (agreement of LTE-A or 5G) selects.
The pre-coding matrix of two UE can also be different, and here, the pre-coding matrix can be based on defined code book (code book of LTE-A or 5G) is determined with transmission mode.
Specifically, described that channel is determined according to the preactivate signaling and the scheduling indication signaling by target terminal user Status information, including：
The target UE determines pre-coding matrix and the distal end of the target UE according to the transmission mode of reception respectively The pre-coding matrix of UE；
The target UE selects currently used power ratio according to the power ratio of the candidate of reception；
The target UE measures the channel estimation value and noise power for obtaining target UE；
According to the pre-coding matrix of the target UE, the pre-coding matrix of distal end UE, the currently used power ratio, institute The channel estimation value and noise power of target UE are stated, calculates and obtains at least one CQI.
Specifically, the channel state information can also include：PMI, RI and/or power ratio recommendation etc., by the mesh It marks UE and acquisition is calculated according to the information of reception.Such as：
PMI is determined according to the preactivate signaling and the scheduling indication signaling by the target terminal user, including：
The target UE is based on that capacity is optimal or Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus Noise Ratio) most high criterion selects PMI.
Step 103：The base station receives the channel state information of the target terminal user feedback, according to the letter Channel state information determines whether to activate the MUST, determines and activate the MUST, then selects institute according to the channel state information State the transmission mode of MUST.
Specifically, determine whether to activate MUST by judging that MUST is activated whether to be conducive to improve system throughput.
It is described to be determined whether to activate the MUST according to the channel state information, including：
System throughput is determined according to determining channel state information, judges to activate the described of multi-user's superposed transmission Whether throughput activates the multi-user superposed transmission described higher than the throughput described in un-activation when multi-user's superposed transmission Throughput is higher than the throughput described in un-activation when multi-user's superposed transmission, it is determined that activates multi-user's superposed transmission.
Specifically, it is determined that transmission mode of transmission mode when each UE best performances as MUST.
The transmission mode that the MUST is selected according to the channel state information, including：
According to the channel state information, the performance of target UE when determining different transmission modes selects the mesh Mark the transmission mode when best performance of UE.
In the embodiment of the present invention, calculates CQI for target UE and do following explanation：
MUST transmission modes that target UE is sent based on eNB, parameter configuration and distal end UE pairings it is assumed that carrying out more The calculating and selection of a CQI and PMI.For example, the method for calculating CQI and PMI, including：
It is assumed that the RRC signaling configuration parameter received is (case3, QPSK+QPSK, 0.75,2), it may be determined that：Distal end UE The transmission mode of case3, i.e. distal end UE is used to use different precodings from target UE with target UE；Distal end UE and target UE's Modulation system is QPSK；The power ratio of distal end UE and target UE is (0.75:1-0.75)；Feed back two best CQI；
The pre-coding matrix that distal end UE and target UE are determined according to transmission mode, according to the power ratio of distal end UE and target UE Determine current power ratio；
Measure the channel estimation value and noise power for obtaining the target UE；
(2) calculate CQI as the following formula：
Wherein, CQInIt is the power ratio of distal end UE and target UE, α=0.75 for n-th of CQI, α；P1、P2For distal end UE and The pre-coding matrix of proximal end UE；s1、s2The respectively symbol power of distal end UE and target UE；H1Channel for the target UE is estimated Evaluation；N is noise power, can be determined by measuring the power in relation to resource block.
Multiple CQI can be calculated based on formula (2) calculating, and can be according to the quantity of the CQI of reception, the PMI Quantity selects best several CQI and PMI, and the quantized value of the CQI of selection and PMI are fed back to the base station.
Fig. 3 is a kind of structural schematic diagram of information feedback device provided in an embodiment of the present invention；Such as Fig. 3 institutes Show, described device, including：First sending module, the second sending module and determining module；Wherein,
First sending module, for sending preactivate signaling to target terminal user, to notify the target to use Family terminal prepares activation MUST；
Second sending module, it is described to indicate for sending scheduling indication signaling to the target terminal user Target terminal user transmitting channel state information；After the preactivate information and the scheduling indication signaling are received, by described Target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling and feeds back to described Base station；
The determining module, the channel state information for receiving the target terminal user feedback, according to described Channel state information determines whether to activate the MUST, determines and activate multi-user's superposed transmission, then according to the channel shape State information selects the transmission mode of the MUST.
Specifically, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission.
Here, the power ratio of the candidate is the power ratio of the distant end user terminal and the target terminal user.
Specifically, the determining module, is specifically used for：Throughput is determined according to the channel state information of feedback, is sentenced Whether the throughput of disconnected activation multi-user's superposed transmission is higher than handling up when multi-user's superposed transmission described in un-activation Rate, the throughput when throughput of multi-user's superposed transmission being activated to be higher than multi-user's superposed transmission described in un-activation, It then determines and activates multi-user's superposed transmission.
Specifically, the determining module, is specifically used for：According to the channel state information, when determining different transmission modes The target terminal user and the distant end user terminal performance, select the target terminal user and the remote subscriber The transmission mode when best performance of terminal.
Fig. 4 is the flow diagram of another channel state information feedback method provided in an embodiment of the present invention, such as Fig. 4 institutes Show, the method includes：
Step 201, base station send preactivate signaling to target terminal user, to notify the target terminal user to prepare Activate MUST；
Step 202, the base station send scheduling indication signaling to the target terminal user, to indicate that the target is used Family terminal transmission channel state information；
Specifically, step 201,202 with the step 101,102 identical, repeat no more；
After step 203, the target terminal user receive preactivate information and the scheduling indication signaling, according to described pre- Activation signaling and the scheduling indication signaling determine channel state information and by the information feedback to the base station；
Specifically, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission；
The target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling, Including：
The target terminal user selects the pre-coding matrix of the target terminal user and remote according to the transmission mode The pre-coding matrix of end user terminal, according to the power ratio power ratio selected to use of the candidate；
After the target terminal user measures acquisition channel estimation value and noise power, in conjunction with the power ratio, the mesh The pre-coding matrix of the pre-coding matrix and distant end user terminal of user terminal is marked, calculates and obtains at least one CQI.
Specifically, the scheduling indicates information, further includes：The resource location of PUCCH or PUSCH；
The channel state information further includes：PMI；
The target terminal user gives information feedback to the base station, including：
According at least one CQI of the number of extracted of the CQI as the channel state information；Alternatively, according to the CQI At least one CQI of number of extracted, and according at least one PMI of the number of extracted of the PMI, using the CQI of extraction and PMI as The channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to institute The period for transmitting the CQI is stated, feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
Step 204, the base station receive the channel state information of the target terminal user feedback, according to the letter Channel state information determines whether to activate the MUST, and when determining the activation MUST, institute is selected according to the channel state information State the transmission mode of MUST.
Specifically, step 204 is identical as the step 103, repeats no more；
Correspondingly, the embodiment of the present invention additionally provides a kind of information feedback system, and Fig. 5 is the embodiment of the present invention A kind of structural schematic diagram of the information feedback system provided；As shown in figure 5, the system, including：Base station and target User terminal；Wherein,
The base station, for sending preactivate signaling to target terminal user, to notify that the target terminal user is accurate Standby activation MUST, the target terminal user are that base station is dispatched in two user terminals in identical time-frequency domain resources apart from base station The close user terminal in side；Scheduling indication signaling is sent to the target terminal user, to indicate that the target terminal user passes Defeated channel state information；And the channel state information of the target terminal user feedback is received, according to the channel status Information determines whether to activate the MUST, and when determining the activation MUST, the MUST is selected according to the channel state information Transmission mode；
The target terminal user is used for after receiving preactivate information and the scheduling indication signaling, according to described pre- Activation signaling and the scheduling indication signaling determine channel state information and feed back to the base station.
Specifically, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission；
The target terminal user, is specifically used for：Prelisting for the target terminal user is selected according to the transmission mode The pre-coding matrix of code matrix and distant end user terminal, according to the power ratio power ratio selected to use of the candidate；Measurement obtains After obtaining channel estimation value and noise power, used in conjunction with the power ratio, the pre-coding matrix of the target terminal user and distal end The pre-coding matrix of family terminal calculates and obtains at least one CQI.
Specifically, the scheduling indicates information, further includes：The resource location of PUCCH or PUSCH；
The channel state information further includes：PMI；
The target terminal user, is specifically used for：According at least one CQI of the number of extracted of the CQI as the letter Channel state information, alternatively, according at least one CQI of number of extracted of the CQI, and at least according to the number of extracted of the PMI One PMI, using the CQI of extraction and PMI as the channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to institute The period for transmitting the CQI is stated, feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
Correspondingly, the embodiment of the present invention additionally provides a kind of channel state information feedback method, is applied to the channel shape State information feedback system；The method includes：
Base station sends preactivate signaling to target terminal user, to notify the target terminal user to prepare activation MUST；
The base station sends scheduling indication signaling to the target terminal user, to indicate that the target terminal user passes Defeated channel state information；
After the target terminal user receives preactivate information and the scheduling indication signaling, according to the preactivate signaling Channel state information is determined with the scheduling indication signaling and feeds back to the base station；
The base station receives the channel state information of the target terminal user feedback, is believed according to the channel status It ceases and determines whether to activate the MUST, when determining the activation MUST, select the MUST's according to the channel state information Transmission mode.
Specifically, the channel state information, including：CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, candidate power Quantity, the quantity of PMI in the period, the CQI more described CQI than, modulation mode combination, transmission；
The target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling, Including：
The target terminal user selects the pre-coding matrix of the target terminal user and remote according to the transmission mode The pre-coding matrix of end user terminal, according to the power ratio power ratio selected to use of the candidate；
After the target terminal user measures acquisition channel estimation value and noise power, in conjunction with the power ratio, the mesh The pre-coding matrix of the pre-coding matrix and distant end user terminal of user terminal is marked, calculates and obtains at least one CQI.
Specifically, the scheduling indicates information, further includes：The resource location of PUCCH or PUSCH；
The channel state information further includes：PMI；
The target terminal user gives information feedback to the base station, including：
According at least one CQI of the number of extracted of the CQI as the channel state information, alternatively, according to the CQI At least one CQI of number of extracted, and according at least one PMI of the number of extracted of the PMI, using the CQI of extraction and PMI as The channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to institute The period for transmitting the CQI is stated, feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
Fig. 6 is the flow diagram of another channel state information feedback method provided in an embodiment of the present invention；Such as Fig. 6 institutes Show, the method, including：
Preactivate is transmitted to carry out MUST, the eNB sends preactivate signaling to target UE；Wherein, the preactivate letter It enables, may include every configuration information that the eNB indicates the target UE execution MUST more kinds of CQI calculating, including：CQI's Period, the quantity of CQI, the quantity of PMI, the transmission mode of CQI, candidate power ratio and modulation mode combination.
Then, the eNB sends DCI to target UE；Wherein, the scheduling indication signaling is the eNB to the target What UE was sent indicates about the ascending resource for transmitting a variety of CQI, i.e. the resource location of PUCCH or PUSCH.
The scheduling indication signaling can also include configuration information included in the part or all of preactivate signaling.
The target UE receives the preactivate signaling with after the scheduling indication signaling, will believe according to the preactivate Configuration information in order executes the calculating process of CQI, and based on the configuration information that is provided in the preactivate signaling and described It dispatches the ascending resource instruction in indication signaling and executes and feed back a variety of CQI selections and feedback mechanism.
Based on a variety of CQI selections and feedback result is fed back, the eNB determines whether to activate MUST processes and determines that MUST is passed Defeated mode.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention Formula.Moreover, the present invention can be used can use storage in the computer that one or more wherein includes computer usable program code The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all All any modification, equivalent and improvement made by within the spirit and principles in the present invention etc. should be included in the protection of the present invention Within the scope of.

Claims (14)

1. a kind of channel state information feedback method, which is characterized in that the method includes：
Base station sends preactivate signaling to target terminal user, to notify that it is folded that the target terminal user prepares activation multi-user Add transmission MUST；The target terminal user is that base station is dispatched in two user terminals in identical time-frequency domain resources apart from base station The close user terminal in side；
The base station sends scheduling indication signaling to the target terminal user, to indicate the target terminal user transmission letter Channel state information；After the preactivate information and the scheduling indication signaling are received, by the target terminal user according to institute It states preactivate signaling and the scheduling indication signaling determines channel state information and feeds back to the base station；
The base station receives the channel state information of the target terminal user feedback, true according to the channel state information It is fixed whether to activate the MUST, when determining the activation MUST, the transmission of the MUST is selected according to the channel state information Mode.
2. according to the method described in claim 1, it is characterized in that, the channel state information, including：Channel quality indicates CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, is adjusted candidate power ratio Quantity, the quantity of pre-coding matrix instruction PMI in mode processed combines, transmits the CQI period, the CQI.
3. according to the method described in claim 1, it is characterized in that, described determine whether to activate according to the channel state information Multi-user's superposed transmission, including：
Throughput is determined according to the channel state information of feedback, judges that the described of multi-user's superposed transmission is activated to handle up Whether rate activates the described of multi-user's superposed transmission to handle up higher than the throughput described in un-activation when multi-user's superposed transmission Rate is higher than the throughput described in un-activation when multi-user's superposed transmission, it is determined that activates multi-user's superposed transmission.
4. according to the method described in claim 1, it is characterized in that, the transmission side of selection multi-user's superposed transmission Formula, including：
According to the channel state information, the target terminal user and the remote subscriber when determining different transmission modes are whole The performance at end selects the transmission mode when best performance of the target terminal user and the distant end user terminal.
5. a kind of channel state information feedback method, it is characterised in that：The method includes：
Base station sends preactivate signaling to target terminal user, to notify that it is folded that the target terminal user prepares activation multi-user Add transmission MUST；
The base station sends scheduling indication signaling to the target terminal user, to indicate the target terminal user transmission letter Channel state information；
After the target terminal user receives preactivate information and the scheduling indication signaling, according to the preactivate signaling and institute Scheduling indication signaling is stated to determine channel state information and feed back to the base station；
The base station receives the channel state information of the target terminal user feedback, true according to the channel state information It is fixed whether to activate the MUST, when determining the activation MUST, the transmission of the MUST is selected according to the channel state information Mode.
6. according to the method described in claim 5, it is characterized in that, the channel state information, including：Channel quality indicates CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, is adjusted candidate power ratio Quantity, the quantity of pre-coding matrix instruction PMI in mode processed combines, transmits the CQI period, the CQI；
The target terminal user determines channel state information according to the preactivate signaling and the scheduling indication signaling, packet It includes：
The target terminal user selects the pre-coding matrix of the target terminal user and distal end to use according to the transmission mode The pre-coding matrix of family terminal, according to the power ratio power ratio selected to use of the candidate；
After the target terminal user measures acquisition channel estimation value and noise power, used in conjunction with the power ratio, the target The pre-coding matrix of family terminal and the pre-coding matrix of distant end user terminal calculate and obtain at least one CQI.
7. according to the method described in claim 6, it is characterized in that, scheduling instruction information, further includes：Physical uplink link The resource location of control channel PUCCH or Physical Uplink Shared Channel PUSCH；
The channel state information further includes：Pre-coding matrix instruction PMI；
The target terminal user gives information feedback to the base station, including：
According at least one CQI of the number of extracted of the CQI as the channel state information；Alternatively, according to the number of the CQI Amount extracts at least one CQI, and according at least one PMI of the number of extracted of the PMI, using the CQI of extraction and PMI as described in Channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to the biography The period of the defeated CQI feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
8. a kind of information feedback device, which is characterized in that described device includes：First sending module, second send Module and determining module；Wherein,
First sending module, for sending preactivate signaling to target terminal user, to notify that the target user is whole End prepares activation multi-user's superposed transmission MUST；The target terminal user is that base station dispatches two in identical time-frequency domain resources The user terminal close apart from base station side in user terminal；
Second sending module, for sending scheduling indication signaling to the target terminal user, to indicate the target User terminal transmitting channel state information；After the preactivate information and the scheduling indication signaling are received, by the target User terminal determines channel state information according to the preactivate signaling and the scheduling indication signaling and feeds back to the base station；
The determining module, the channel state information for receiving the target terminal user feedback, according to the channel shape State information determines whether to activate the MUST, when determining the activation MUST, according to channel state information selection The transmission mode of MUST.
9. device according to claim 8, which is characterized in that the channel state information, including：Channel quality indicates CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, is adjusted candidate power ratio Quantity, the quantity of pre-coding matrix instruction PMI in mode processed combines, transmits the CQI period, the CQI.
10. device according to claim 8, which is characterized in that the determining module is specifically used for：According to the institute of feedback It states channel state information and determines throughput, judge to activate whether the throughput of multi-user's superposed transmission is higher than un-activation Throughput when multi-user's superposed transmission activates the throughput of multi-user's superposed transmission higher than described in un-activation Throughput when multi-user's superposed transmission, it is determined that activate multi-user's superposed transmission.
11. device according to claim 8, which is characterized in that the determining module is specifically used for：According to the channel Status information, the performance of the target terminal user and the distant end user terminal when determining different transmission modes select institute State the transmission mode when best performance of target terminal user and the distant end user terminal.
12. a kind of information feedback system, which is characterized in that the system, including：Base station and target terminal user； Wherein,
The base station, for sending preactivate signaling to target terminal user, to notify the target terminal user to prepare to swash Multi-user's superposed transmission MUST living, the target terminal user are that two user terminals are dispatched in base station in identical time-frequency domain resources The middle user terminal close apart from base station side；Scheduling indication signaling is sent to the target terminal user, to indicate the target User terminal transmitting channel state information；And the channel state information of the target terminal user feedback is received, according to institute It states channel state information to determine whether to activate the MUST, when determining the activation MUST, be selected according to the channel state information Select the transmission mode of the MUST；
The target terminal user is used for after receiving preactivate information and the scheduling indication signaling, according to the preactivate Signaling and the scheduling indication signaling determine channel state information and feed back to the base station.
13. system according to claim 12, which is characterized in that the channel state information, including：Channel quality indicates CQI；
The preactivate signaling or the scheduling indication signaling, including：The transmission mode of the MUST, is adjusted candidate power ratio Quantity, the quantity of pre-coding matrix instruction PMI in mode processed combines, transmits the CQI period, the CQI；
The target terminal user, is specifically used for：The precoding square of the target terminal user is selected according to the transmission mode The pre-coding matrix of battle array and distant end user terminal, according to the power ratio power ratio selected to use of the candidate；Measurement is believed It is whole in conjunction with the power ratio, the pre-coding matrix of the target terminal user and remote subscriber after road estimated value and noise power The pre-coding matrix at end calculates and obtains at least one CQI.
14. system according to claim 13, which is characterized in that the scheduling indicates information, further includes：Physical uplink chain The resource location of road control channel PUCCH or Physical Uplink Shared Channel PUSCH；
The channel state information further includes：Pre-coding matrix instruction PMI；
The target terminal user, is specifically used for：According at least one CQI of the number of extracted of the CQI as the channel shape State information；Alternatively, according at least one CQI of number of extracted of the CQI, and it is at least one according to the number of extracted of the PMI PMI, using the CQI of extraction and PMI as the channel state information；
According to the transmission mode, the modulation system of the distant end user terminal and the target terminal user, according to the biography The period of the defeated CQI feeds back the channel state information on the resource location of the specified PUCCH or PUSCH.
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