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WO2018228308A1 - 一种信道状态信息反馈的方法、装置和存储介质 - Google Patents

一种信道状态信息反馈的方法、装置和存储介质 Download PDF

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Publication number
WO2018228308A1
WO2018228308A1 PCT/CN2018/090580 CN2018090580W WO2018228308A1 WO 2018228308 A1 WO2018228308 A1 WO 2018228308A1 CN 2018090580 W CN2018090580 W CN 2018090580W WO 2018228308 A1 WO2018228308 A1 WO 2018228308A1
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Prior art keywords
subbands
sub
rpi
subband
bands
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PCT/CN2018/090580
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English (en)
French (fr)
Inventor
吴昊
李儒岳
陈艺戬
鲁照华
蔡剑兴
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP18818726.4A priority Critical patent/EP3654542A4/en
Priority to JP2019569261A priority patent/JP7296325B2/ja
Priority to KR1020207001539A priority patent/KR102291968B1/ko
Publication of WO2018228308A1 publication Critical patent/WO2018228308A1/zh
Priority to US16/455,722 priority patent/US11050476B2/en
Priority to US17/361,121 priority patent/US11539418B2/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
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
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    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
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    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
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    • H04B7/00—Radio transmission systems, i.e. using radiation field
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    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction
    • H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
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    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
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    • H—ELECTRICITY
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    • 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
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    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals

Definitions

  • the present disclosure relates to, but is not limited to, the field of channel quality detection.
  • the transmitting end and the receiving end generally use multiple antennas to transmit and receive to obtain a higher rate.
  • the principle of multiple-input-multiple-output (MIMO) technology is to use some characteristics of the channel to form a multi-layer transmission of matching channel characteristics, thereby effectively improving system performance without increasing bandwidth and power.
  • MIMO multiple-input-multiple-output
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • the channel state information has two feedback modes, namely, periodic feedback and aperiodic feedback.
  • the uplink control channel Physical Uplink Control Channel, referred to as PUCCH
  • PUCCH Physical Uplink Control Channel
  • the periodic feedback is performed, and the non-periodic feedback is performed by using a physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • the base station can configure the terminal to measure and quantize the channel information, and use the PUCCH to quantize the CSI information (including the Rank Indicator (RI)/Precoding Matrix Indicator ( Precoding Matrix Indicator (PMI)/Channel Quality Indication (CQI) for periodic feedback.
  • RI Rank Indicator
  • PMI Precoding Matrix Indicator
  • CQI Channel Quality Indication
  • the base station can also aperiodically trigger the terminal to perform CSI information (including RI/PMI) when needed. /CQI) is reported mainly on the PUSCH. To overcome the problem that the periodic feedback is not high enough, the CSI quantization accuracy is limited by the control channel overhead.
  • the eigenvector space of the channel matrix is quantized to form the codebook space
  • the transmitter and the receiver jointly save or generate the codebook in real time (same as the transceiver).
  • the receiving end is based on certain criteria. Select a codeword that best matches the channel And feed back the codeword number i (ie, PMI) back to the transmitting end.
  • the transmitting end finds the corresponding precoding codeword according to the serial number i
  • the feature vector information of the channel is indicated.
  • the codebook of LTE is also evolving with the evolution of the standard version.
  • W 2 represents a short-term feedback codebook, called the second codebook, which is used to select one of the M 1 candidate beams in the W 1 codeword and be the same data.
  • the number of 2 specific can refer to the LTE Release 10 protocol.
  • the codewords before Release 12 are for 1D antenna arrays and belong to 1D codewords.
  • the size of the codebook becomes larger due to the use of more antennas.
  • the topology of the antenna is also generally planar, that is, the antenna with two dimensions is designed with 2D code words.
  • each beam in the first codebook W 1 has a form of two-dimensional form
  • v m and u n are Discrete Fourier Transform (DFT) of the first dimension and the second dimension, respectively.
  • DFT Discrete Fourier Transform
  • the first dimension port (port includes antenna / port / port / transmission unit / array / array element and other devices that can send signals) number N 1
  • the second dimension port number N 2 the first dimension port corresponding DFT is carried out O 1 times oversampling
  • the DFT corresponding to the port of the second dimension is oversampled by 2 times
  • B 2 N 2 *O 2
  • O 1 is the first dimension oversampling factor
  • O 2 is the second dimension oversampling factor.
  • the codebook of the second dimension of the first codebook is represented by PMI 12
  • its value is i 12 1,...,N 12
  • the code word of 12 > 1 becomes a 2D code word. If it is a 1D codeword and the single codeword structure is represented by PMI or i, if it is a 1D codeword and is represented by PMI 1 and PMI 2 in a double codeword structure, the index is represented by i 1 /i 2 together, if 2D codeword with PMI 11, PMI 12, PMI 2 together represent three yards or codebook index 12, i 2 collectively denoted by the index i 11, i.
  • the pre-coding matrix or the configuration beam is performed based on the strongest path information in the channel, and the information of other paths of the channel is ignored, so that the feedback or the configured information does not match the channel well. Thereby affecting the performance of the system. Therefore, in order to solve this problem, the 3rd Generation Partnership Project (3GPP) on the fifth-generation mobile communication technology (5th-Generation, referred to as 5G) standard discussion, in the new wireless access technology
  • 3GPP 3rd Generation Partnership Project
  • 5G fifth-generation mobile communication technology
  • 5G fifth-generation mobile communication technology
  • the (New Radio Access, NR for short) system introduces a codebook based on multi-path information for linear weighted combination, which can greatly improve the feedback accuracy and improve the performance of the system.
  • channel information is quantized into a linear combination of multiple beams, ie, each layer of precoding codewords is a linear combination of multiple one or two dimensional DFT vectors, each The one-dimensional or two-dimensional DFT vector can use PMI feedback according to the above manner.
  • the corresponding weighting coefficient amplitude of each PMI can be fed back by Relative Power Indicator (RPI), and the weighting coefficient phase can be phase indication information ( PI) feedback.
  • RPI Relative Power Indicator
  • Embodiments of the present disclosure provide a method, apparatus, and storage medium for CSI feedback.
  • a method for CSI feedback, applied to a terminal comprising:
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the value of M is determined according to configuration signaling of the base station or an agreement with the base station.
  • the M subband feedback PIs and/or RPIs are selected, including at least one of the following:
  • the indication signaling of the base station selecting M subbands from the K subbands, and reporting the PI and/or RPI of the M subbands;
  • M subbands are selected from the K subbands, and the PI and/or RPI of the M subbands are reported.
  • the indication signaling includes at least one of the following signaling: physical layer signaling, radio resource control (RRC) signaling, media access control (MAC) signaling, downlink control information (DCI), and bitmap. .
  • RRC radio resource control
  • MAC media access control
  • DCI downlink control information
  • the M subbands are selected from the K subbands according to a pre-agreed manner with the base station, and the PI and/or the RPI of the M subbands are fed back, and the agreed manner includes at least one of the following:
  • M subbands are the lowest frequency subbands of the K subbands
  • M subbands are the most frequent subbands of the K subbands
  • M subbands contain the highest and lowest subbands of the K subbands
  • the M sub-bands are comb-like distributed in the K sub-bands.
  • selecting the M subbands from the K subbands as the subbands for reporting the PI and/or the RPI includes:
  • the CQIs of the K subbands are calculated, and the M subbands with the best CQI of the K subbands are used as subbands for reporting PI and/or RPI.
  • the method further includes: feeding back, to the base station, number information of the M subbands having the best CQI among the K subbands.
  • calculating CQIs of the K subbands includes:
  • the CQI is calculated from the PMI, RPI, and PI obtained from the channel measurement.
  • the M subband feedback PI and/or the RPI are selected from the K subbands of the CSI feedback bandwidth, including:
  • the K subbands are divided into N subband sets, and one or more subbands are determined from each of the subband sets to form M subbands as subbands for reporting PI and/or RPI.
  • the manner in which the K subbands of the feedback bandwidth are divided into N subband sets includes at least one of the following:
  • the K sub-bands are divided into N sub-band sets, and determining one or more sub-bands from each of the sub-band sets includes:
  • the K subbands of the feedback bandwidth are divided into N subband sets, and the nth subband set includes Kn subbands; the Mn subbands are determined in the nth subband set as subbands for reporting PI or RPI; n is An integer greater than or equal to 1, and n ⁇ N.
  • the value of Mn is determined according to configuration signaling of the base station or an agreement with the base station.
  • the manner of determining one or more sub-bands from each of the sub-band sets includes at least one of the following:
  • a corresponding number of sub-bands are selected from each of the sub-band sets as sub-bands for reporting PI and/or RPI.
  • selecting a corresponding number of sub-bands from each of the sub-band sets as the sub-bands for reporting the PI or the RPI includes:
  • selecting the RPI and/or PI corresponding to the Mn subband feedback in the Kn subbands of the nth subband set includes at least one of the following:
  • Mn subbands are the lowest frequency subbands of Kn subbands
  • Mn subbands are the most frequent subbands of Kn subbands
  • Mn subbands contain the highest and lowest subbands of the Kn subbands
  • the Mn sub-bands are distributed in a comb shape in the Kn sub-bands.
  • the K subbands are divided into N subband sets according to an agreed manner, and at least:
  • the K subbands are equally divided into N subband sets.
  • the method for dividing the K subbands into N subband sets includes at least one of the following:
  • the information indicated by the RPI or PI associated with the precoding codebook index does not exceed the subband of the DR or DP, and the DR or DP is a predefined value; or the DR or DP is determined according to base station signaling. ;
  • the information indicating the RPI or PI indicated by the precoding codebook index differs from the subband change rate by a subband that does not exceed the subband of the ER or EP, the ER or EP being a predefined value, or according to the base station letter Let the ER or EP be determined.
  • the value of at least one of the N, Kn, and Mn is fed back to the base station.
  • the embodiment of the present disclosure further provides a method for CSI feedback, which is applied to a base station, and includes:
  • the M subbands are selected by the terminal from the K subbands of the CSI feedback bandwidth;
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the method further includes: notifying, by using configuration signaling, the value of the terminal M.
  • the method further includes: signaling, by the configuration signaling, that the M subbands comb the information of the order in the K subbands.
  • the method further includes: by indicating, signaling, that the terminal selects M subbands from the K subbands as subbands for reporting PI and/or RPI.
  • the indication signaling includes at least one of the following signaling: physical layer signaling, RRC signaling, MAC signaling, DCI, and bitmap.
  • the method further includes: receiving, by the terminal, feedback number information of M subbands in the K subbands.
  • the method further includes: informing the terminal to divide the K subbands of the feedback bandwidth into N subband sets.
  • the method further includes: notifying the terminal, determining one or more sub-bands from each of the sub-band sets, and forming M sub-bands as sub-bands for reporting PI and/or RPI.
  • the method further includes: informing the terminal that the K subbands of the feedback bandwidth are divided into N subband sets, and the nth subband set includes Kn subbands.
  • the method further includes: informing the terminal to determine Mn subbands in the nth subband set as a subband reporting PI or RPI; n is an integer greater than or equal to 1, and n ⁇ N.
  • the method further includes: receiving, by the terminal, the number of subband sets fed back, the number of subbands in each subband set, and the number of subbands in which the PI and/or the RPI are fed back in each subband set. The value of at least one of them.
  • the embodiment of the present disclosure further provides a device for CSI feedback, which is disposed on the terminal, and includes:
  • a measurement module configured to perform channel measurement based on the reference signal
  • the feedback module is configured to: from the K subbands of the CSI feedback bandwidth, select M subbands, and report the weighting coefficients PI and/or RPI associated with the precoding codebook index of the M subbands to the base station;
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the feedback module is configured to determine the value of M according to configuration signaling of the base station or an agreement with the base station.
  • the feedback module selects M subband feedback PIs and/or RPIs from the K subbands of the CSI feedback bandwidth, including at least one of the following:
  • the indication signaling of the base station selecting M subbands from the K subbands, and reporting the PI and/or RPI of the M subbands;
  • M subbands are selected from the K subbands, and the PI and/or RPI of the M subbands are reported.
  • the feedback module selects M subbands from the K subbands according to a pre-agreed manner with the base station, and feeds back the PI and/or the RPI of the M subbands, and the agreed manner includes at least one of the following:
  • M subbands are the lowest frequency subbands of the K subbands
  • M subbands are the most frequent subbands of the K subbands
  • M subbands contain the highest and lowest subbands of the K subbands
  • the M sub-bands are comb-like distributed in the K sub-bands.
  • the feedback module selects M subbands from the K subbands as the subbands for reporting the PI and/or the RPI according to the result information of the channel measurement, including:
  • the CQIs of the K subbands are calculated, and the M subbands with the best CQI of the K subbands are used as subbands for reporting PI and/or RPI.
  • the feedback module is further configured to: feed back, to the base station, number information of the M subbands with the best CQI among the K subbands.
  • the calculating, by the feedback module, the CQI of the K subbands includes:
  • the CQI is calculated from the PMI, RPI, and PI obtained from the channel measurement.
  • the feedback module selects M subband feedback PIs and/or RPIs from the K subbands of the CSI feedback bandwidth, including:
  • the K subbands are divided into N subband sets, and one or more subbands are determined from each of the subband sets to form M subbands as subbands for reporting PI and/or RPI.
  • the manner in which the feedback module divides the K subbands of the feedback bandwidth into N subband sets includes at least one of the following:
  • the K sub-bands are divided into N sub-band sets, and determining one or more sub-bands from each of the sub-band sets includes:
  • the K subbands of the feedback bandwidth are divided into N subband sets, and the nth subband set includes Kn subbands; the Mn subbands are determined in the nth subband set as subbands for reporting PI or RPI; n is An integer greater than or equal to 1, and n ⁇ N.
  • the value of Mn is determined according to configuration signaling of the base station or an agreement with the base station.
  • the manner in which the feedback module determines one or more sub-bands from each of the sub-band sets includes at least one of the following:
  • a corresponding number of sub-bands are selected from each of the sub-band sets as sub-bands for reporting PI and/or RPI.
  • the feedback module selects a corresponding number of subbands from each of the subband sets as a subband for reporting the PI or the RPI, including:
  • the feedback module selects, according to an agreed manner, the RPI and/or PI corresponding to the Mn subband feedbacks in the Kn subbands of the nth subband set, including at least one of the following:
  • Mn subbands are the lowest frequency subbands of Kn subbands
  • Mn subbands are the most frequent subbands of Kn subbands
  • Mn subbands contain the highest and lowest subbands of the Kn subbands
  • the Mn sub-bands are distributed in a comb shape in the Kn sub-bands.
  • the feedback module divides the K sub-bands into N sub-band sets according to an agreed manner, and at least includes:
  • the K subbands are equally divided into N subband sets.
  • the method for dividing the K subbands into N subband sets according to the result of the channel measurement includes at least one of the following:
  • the information indicated by the RPI or PI associated with the precoding codebook index does not exceed the subband of the DR or DP, and the DR or DP is a predefined value; or the DR or DP is determined according to base station signaling. ;
  • the information indicating the RPI or PI indicated by the precoding codebook index differs from the subband change rate by a subband that does not exceed the subband of the ER or EP, the ER or EP being a predefined value, or according to the base station letter Let the ER or EP be determined.
  • the feedback module feeds back a value of at least one of the N, Kn, and Mn to the base station.
  • the embodiment of the present disclosure further provides a device for CSI feedback, which is disposed at a base station, and includes:
  • a communication module configured to receive a weighting coefficient PI and/or an RPI associated with a precoding codebook index of M subbands reported by the terminal; the M subbands are selected by the terminal from K subbands of a CSI feedback bandwidth;
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the communication module is further configured to notify the value of the terminal M by using configuration signaling.
  • the communication module is further configured to: notify, by the configuration signaling, that the M subbands comb the information of the order in the K subbands.
  • the communication module is further configured to: notify, by the indication signaling, that the terminal selects M subbands from the K subbands as subbands for reporting PI and/or RPI.
  • the communication module is further configured to: receive, by the terminal, feedback number information of M subbands in the K subbands.
  • the communication module is further configured to: notify the terminal to divide the K subbands of the feedback bandwidth into N subband sets.
  • the communication module is further configured to: notify the terminal, determine one or more sub-bands from each of the sub-band sets, and form M sub-bands as sub-bands for reporting PI and/or RPI.
  • the communication module is further configured to: notify the terminal to divide the K subbands of the feedback bandwidth into N subband sets, and the nth subband set includes Kn subbands;
  • the communication module is further configured to: notify the terminal to determine Mn subbands in the nth subband set as a subband reporting PI or RPI; n is an integer greater than or equal to 1, and n ⁇ N.
  • the communication module is further configured to: receive the number of subband sets fed back by the terminal, the number of subbands in each subband set, and subbands of feedback PI and/or RPI in each subband set. The value of at least one of the numbers.
  • the embodiment of the present disclosure further provides a storage medium on which a computer program is stored, and when the computer program is executed by the processor, the steps of any method on the terminal side are implemented, or steps of any method on the base station side are implemented.
  • the technical solution of the embodiment of the present disclosure does not feed back the RPI and PI of each subband, and only feeds back the RPI and PI of the partial subband. In this way, the feedback overhead can be reduced first.
  • the base station since the amplitude and phase information indicated by the RPI and the PI have a certain correlation on different subbands, the base station can interpolate the information of other subbands by using M subbands. Therefore, the CSI feedback The performance can also be guaranteed, and the problem that the CSI feedback overhead is too large when the CSI is fed back using the linear merge codebook technology can be solved.
  • FIG. 1 is a schematic diagram of linear combined codebook feedback according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a method for CSI feedback according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of another method for CSI feedback according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of an apparatus for CSI feedback according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an apparatus for CSI feedback according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of sub-band feedback according to Embodiment 1 of the present disclosure.
  • FIG. 7 is a schematic diagram of sub-band feedback according to Embodiment 2 of the present disclosure.
  • Fig. 8 is a schematic view showing a comb-like distribution of Embodiment 1 of the present disclosure.
  • the channel information measured by the terminal according to the reference signal is quantized into a linear combination of multiple beams, that is, the precoding codewords of each layer are multiple.
  • the selected beam vectors c 0 , c 1 and c 2 can be quantized by conventional PMI, and the coefficients used for weighting the PMIs include amplitude information.
  • ⁇ 1 , ⁇ 2 and phase information ⁇ 1 , ⁇ 2 the amplitude information can be quantized by selecting the RPI, and the phase information can be quantized by selecting the PI.
  • the feedback overhead is greatly increased due to the need to feed back the RPI and PI information corresponding to each beam.
  • the frequency selectivity of the beam information in the wireless channel is weak. Therefore, in the linear combined codebook feedback, the beam PMI information indicating the base vector can be reported to the base station through the broadband feedback.
  • the phase of the weighting coefficient is mainly affected by factors such as delay and random phase, and the frequency selectivity is strong. Therefore, PI requires subband feedback.
  • the amplitude information of the weighting coefficient that is, the RPI
  • the wideband feedback can ensure better performance, and the subband feedback can further improve the performance, but brings a large overhead, and therefore can be configured as broadband feedback or subband feedback according to requirements.
  • high-performance linear combined codebook feedback requires sub-band feedback for both RPI and PI of each beam.
  • the weighted phase coefficient indicated by PI it is mainly affected by two factors, one is the random initial phase, and the other is the phase change caused by the delay in the frequency domain.
  • the phase change of each polarization direction can be regarded as a fixed value on each sub-band.
  • the phase change caused in the frequency domain can be regarded as linearly varying with frequency.
  • the transformation of the phase indicated by the PI over different frequency bands can be modeled with linear, piecewise linear or other types of functions.
  • the PI and RPI corresponding to the same beam have a certain correlation between the amplitude and phase indicated on different subbands.
  • the correlation of the amplitude and phase coefficients indicated by PI and RPI on different sub-bands can be used to reduce the overhead of sub-band feedback.
  • a simple method is to feedback the RPI and PI of each subband without feedback, and only feedback the RPI and PI of the partial subband, and give a reduced subband feedback mode.
  • an embodiment of the present disclosure provides a method for applying CSI feedback to a terminal, including:
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the PI and/or RPI feedback bandwidth includes a total of K subbands, and the terminal feeds back the RPI and/or PI corresponding to the M subbands in the K subbands, where M is an integer greater than 0 and less than K, so that The feedback overhead can be reduced. Since the amplitude and phase information indicated by the RPI and the PI have a certain correlation on different subbands, the base station can interpolate the information of other subbands by using M subbands. Therefore, the CSI feedback performance can also be obtained. Guarantee.
  • the determining of the M value includes at least one of the following: according to configuration signaling of the base station or an agreement with the base station.
  • the M subband feedback PIs and/or RPIs are selected to include at least one of the following:
  • Manner 1 According to the indication signaling of the base station, selecting M subbands from the K subbands as subbands for reporting PI and/or RPI;
  • Manner 2 According to a pre-arrangement with the base station, selecting M subbands from the K subbands as subbands for reporting PI and/or RPI;
  • the K subbands are divided into N subband sets, and one or more subbands are determined from each of the subband sets to form M subbands as subbands for reporting PI and/or RPI.
  • the indication signaling includes at least one of the following signaling: physical layer signaling, RRC signaling, MAC signaling, DCI, and bitmap.
  • the M subbands are selected from the K subbands as the subbands for reporting the PI and/or the RPI according to a pre-agreed manner with the base station, and the agreed manner includes at least one of the following:
  • M subbands are the lowest frequency subbands of the K subbands
  • M subbands are the most frequent subbands of the K subbands
  • M subbands contain the highest and lowest subbands of the K subbands
  • the M sub-bands are comb-like distributed in the K sub-bands.
  • selecting the M subbands from the K subbands as the subbands for reporting the PI and/or the RPI includes:
  • the CQIs of the K subbands are calculated, and the M subbands with the best CQI of the K subbands are used as subbands for reporting PI and/or RPI.
  • the terminal may further feed back, to the base station, number information of the M subbands with the best CQI in the K subbands.
  • Calculating the CQI of the K subbands includes: calculating CQI according to PMI, RPI, and PI obtained by channel measurement.
  • the method of dividing the K subbands of the feedback bandwidth into the N subband sets includes at least one of the following:
  • the K subbands are divided into N subband sets, and determining one or more subbands from each of the subband sets includes:
  • the K subbands of the feedback bandwidth are divided into N subband sets, and the nth subband set includes Kn subbands; the Mn subbands are determined in the nth subband set as subbands for reporting PI or RPI; n is An integer greater than or equal to 1, and n ⁇ N.
  • the value of Mn is determined according to the configuration signaling of the base station or the agreement with the base station.
  • the value of at least one of the N, Kn, and Mn is fed back to the base station.
  • the manner of determining one or more sub-bands from each of the set of sub-bands includes at least one of the following:
  • a corresponding number of sub-bands are selected from each of the sub-band sets as sub-bands for reporting PI and/or RPI.
  • selecting a corresponding number of sub-bands from each of the sub-band sets as the sub-bands for reporting the PI or the RPI includes:
  • the RPI and/or PI corresponding to the Mn subband feedbacks in the Kn subbands of the nth subband set includes at least one of the following:
  • Mn subbands are the lowest frequency subbands of Kn subbands
  • Mn subbands are the most frequent subbands of Kn subbands
  • Mn subbands contain the highest and lowest subbands of the Kn subbands
  • the Mn sub-bands are distributed in a comb shape in the Kn sub-bands.
  • the K sub-bands are divided into N sub-band sets, including at least:
  • the K subbands are equally divided into N subband sets.
  • the method of dividing the K sub-bands into N sub-band sets includes at least one of the following:
  • the information indicated by the RPI or PI associated with the precoding codebook index does not exceed the subband of the DR or DP, and the DR or DP is a predefined value; or the DR or DP is determined according to base station signaling. ;
  • the information indicating the RPI or PI indicated by the precoding codebook index differs from the subband change rate by a subband that does not exceed the subband of the ER or EP, the ER or EP being a predefined value, or according to the base station letter Let the ER or EP be determined.
  • an embodiment of the present disclosure further provides a method for CSI feedback, which is applied to a base station, and includes:
  • S201 Receive a weighting coefficient PI and/or an RPI associated with a precoding codebook index of M subbands reported by the terminal; where the M subbands are selected by the terminal from K subbands of a CSI feedback bandwidth;
  • S202 Determine CSI of K subbands according to correlation between amplitude and phase of PI and/or RPI of the M subbands in subbands.
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the base station may also notify the value of the terminal M by using configuration signaling.
  • the base station may also notify the terminal, by using configuration signaling, that the M subbands comb the information of the order in the K subbands.
  • the base station may further notify the terminal, by using indication signaling, that M subbands are selected from the K subbands as subbands for reporting PI and/or RPI.
  • the indication signaling includes at least one of the following signaling: physical layer signaling, RRC signaling, MAC signaling, DCI, and bitmap.
  • the base station further receives, by the terminal, feedback number information of M subbands in the K subbands.
  • the sub-band that selects the M sub-bands from the K sub-bands by using the indication signaling to report the PI and/or the RPI includes:
  • the terminal is notified to divide the K subbands of the feedback bandwidth into N subband sets, and one or more subbands are determined from each of the subband sets to form M subbands as subbands for reporting PI and/or RPI.
  • the terminal is notified to divide the K subbands of the feedback bandwidth into N subband sets, and the nth subband set includes Kn subbands; and the Mn subbands are determined in the nth subband set as the reported PI Or a subband of the RPI; n is an integer greater than or equal to 1, and n ⁇ N.
  • the base station further receives the number of subband sets fed back by the terminal, the number of subbands in each subband set, and the value of at least one of the number of subbands of the feedback PI and/or the RPI in each subband set.
  • the embodiment of the present disclosure further provides a device for CSI feedback, which is disposed in the terminal, and includes:
  • a measurement module configured to perform channel measurement based on the reference signal
  • the feedback module is configured to: from the K subbands of the CSI feedback bandwidth, select M subbands, and report the weighting coefficients PI and/or RPI associated with the precoding codebook index of the M subbands to the base station;
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the feedback module is configured to determine the value of M according to configuration signaling of the base station or an agreement with the base station.
  • the feedback module selects M subband feedback PIs and/or RPIs from the K subbands of the CSI feedback bandwidth, including at least one of the following:
  • the indication signaling of the base station selecting M subbands from the K subbands, and reporting the PI and/or RPI of the M subbands;
  • M subbands are selected from the K subbands, and the PI and/or RPI of the M subbands are reported.
  • the feedback module selects M subbands from the K subbands according to a pre-agreed manner with the base station, and the agreed manner includes at least one of the following:
  • M subbands are the lowest frequency subbands of the K subbands
  • M subbands are the most frequent subbands of the K subbands
  • M subbands contain the highest and lowest subbands of the K subbands
  • the M sub-bands are comb-like distributed in the K sub-bands.
  • the feedback module selects M subbands from the K subbands as the subbands for reporting the PI and/or the RPI according to the result information of the channel measurement, including:
  • the CQIs of the K subbands are calculated, and the M subbands with the best CQI of the K subbands are used as subbands for reporting PI and/or RPI.
  • the feedback module is further configured to: feed back, to the base station, number information of the M subbands with the best CQI among the K subbands.
  • the calculating, by the feedback module, the CQI of the K subbands includes:
  • the CQI is calculated based on the precoding indication information PMI, the relative power indication information RPI, and the phase indication information PI obtained by the channel measurement.
  • the manner in which the feedback module divides the K subbands of the feedback bandwidth into N subband sets includes at least one of the following:
  • Dividing the K sub-bands into N sub-band sets, and determining one or more sub-bands from each of the sub-band sets includes:
  • the K subbands of the feedback bandwidth are divided into N subband sets, and the nth subband set includes Kn subbands; the Mn subbands are determined in the nth subband set as subbands for reporting PI or RPI; n is An integer greater than or equal to 1, and n ⁇ N.
  • the value of Mn is determined according to the configuration signaling of the base station or the agreement with the base station.
  • the manner in which the feedback module determines one or more sub-bands from each of the sub-band sets includes at least one of the following:
  • a corresponding number of sub-bands are selected from each of the sub-band sets as sub-bands for reporting PI and/or RPI.
  • the feedback module selects a corresponding number of subbands from each of the subband sets as a subband for reporting the PI or the RPI, including:
  • the feedback module selects, according to an agreed manner, the RPI and/or PI corresponding to the Mn subband feedbacks in the Kn subbands of the nth subband set, including at least one of the following:
  • Mn subbands are the lowest frequency subbands of Kn subbands
  • Mn subbands are the most frequent subbands of Kn subbands
  • Mn subbands contain the highest and lowest subbands of the Kn subbands
  • the Mn sub-bands are distributed in a comb shape in the Kn sub-bands.
  • the feedback module divides the K sub-bands into N sub-band sets according to an agreed manner, and at least includes:
  • the K subbands are equally divided into N subband sets.
  • the method for dividing the K subbands into N subband sets according to the result of the channel measurement includes at least one of the following:
  • the information indicated by the RPI or PI associated with the precoding codebook index does not exceed the subband of the DR or DP, and the DR or DP is a predefined value; or the DR or DP is determined according to base station signaling. ;
  • the information indicating the RPI or PI indicated by the precoding codebook index differs from the subband change rate by a subband that does not exceed the subband of the ER or EP, the ER or EP being a predefined value, or according to the base station letter Let the ER or EP be determined.
  • the feedback module feeds back, to the base station, a value of at least one of the N, Kn, and Mn.
  • the measurement module and the feedback module can be implemented by a processor in the CSI feedback device in conjunction with the communication interface.
  • the embodiment of the present disclosure further provides a device for CSI feedback, which is disposed at a base station, and includes:
  • a communication module configured to receive a weighting coefficient PI and/or an RPI associated with a precoding codebook index of M subbands reported by the terminal; the M subbands are selected by the terminal from K subbands of a CSI feedback bandwidth;
  • Determining a module configured to determine CSI of K sub-bands according to correlation between amplitude and phase of the sub-bands of the M and/or RPI of the M sub-bands;
  • M and K are integers greater than or equal to 1
  • M ⁇ K the subband is a set of R resource blocks RB
  • R is an integer greater than or equal to 1.
  • the communication module is further configured to notify the value of the terminal M by using configuration signaling.
  • the communication module is further configured to: notify, by the configuration signaling, that the M subbands comb the information of the order in the K subbands.
  • the communication module is further configured to: notify, by the indication signaling, that the terminal selects M subbands from the K subbands as subbands for reporting PI and/or RPI.
  • the communication module is further configured to: receive, by the terminal, feedback number information of M subbands in the K subbands.
  • the communication module is further configured to: notify the terminal to divide the K subbands of the feedback bandwidth into N subband sets.
  • the communication module is further configured to: notify the terminal, determine one or more sub-bands from each of the sub-band sets, and form M sub-bands as sub-bands for reporting PI and/or RPI.
  • the communication module is further configured to: notify the terminal to divide the K subbands of the feedback bandwidth into N subband sets, and the nth subband set includes Kn subbands;
  • the communication module is further configured to: notify the terminal to determine Mn subbands in the nth subband set as a subband reporting PI or RPI; n is an integer greater than or equal to 1, and n ⁇ N.
  • the communication module is further configured to: receive the number of subband sets fed back by the terminal, the number of subbands in each subband set, and at least the number of subbands that feed back PI and/or RPI in each subband set. The value of one.
  • the communication module may be implemented by a processor in a CSI feedback device in conjunction with a communication interface; the determination module may be implemented by a processor in a CSI feedback device.
  • the apparatus for providing CSI feedback in the foregoing embodiment is only illustrated by the division of each of the foregoing program modules. In actual applications, the foregoing processing may be performed by different program modules as needed. That is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above.
  • the apparatus for the CSI feedback provided by the foregoing embodiment is the same as the method embodiment of the CSI feedback, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.
  • the M subbands are selected from the K subbands of the CSI feedback bandwidth, and specifically include:
  • the terminal can determine the value of M in multiple ways, and the M subbands in the K subbands:
  • Method 1 Base station signaling notification.
  • the base station may notify the terminal to feed back the RPI and/or PI on the M subbands of the K subbands through higher layer or physical layer signaling. For example, the base station can inform the terminal how to select M subbands from the K subbands by means of a bitmap.
  • the signaling may be high layer signaling, such as RRC, MAC signaling, to implement a semi-static, semi-persistent configuration, or PHY signaling, such as DCI, to enable dynamic configuration.
  • Method 2 The agreed way.
  • the terminal may select some M subbands with relatively fixed positions from the K subbands according to a manner agreed with the base station, for example:
  • M subbands are the lowest frequency subbands of K subbands
  • M subbands are the most frequent subbands of K subbands
  • M subbands contain the highest and lowest subbands of the K subbands
  • the M subbands are comb-like distributed in the K subbands (as shown in FIG. 8), and the base station can determine the M value by signaling the combing order.
  • Mode 3 The terminal decides itself according to the result of channel measurement.
  • the terminal performs channel measurement according to the reference signal, calculates RPI and PI on each sub-band, and calculates CQI on each sub-band based on information such as RPI, RI, PI, PMI, etc., and feeds back the RPI corresponding to the best M sub-bands of the CQI, PI, and feedback the corresponding M subband numbers.
  • the overhead of the sub-band RPI and the PI feedback can be reduced on the basis of ensuring the CSI feedback performance.
  • the K subbands in the CSI feedback bandwidth are divided into N subband sets, and each subband set includes Kn subbands.
  • the R1 and PI corresponding to the Mn subbands are selected in the Kn subbands of the nth subband set, as shown in FIG. 7.
  • the terminal may determine how to select the RPI and PI corresponding to the Mn subband feedback among the Kn subbands of the nth subband set in various manners.
  • Method 1 Base station signaling notification.
  • the base station may notify the terminal to feed back the RPI and/or PI on the Mn subbands in the Kn subbands through higher layer or physical layer signaling.
  • the base station can inform the terminal how to select Mn subbands from the Kn subbands by means of a bitmap.
  • the signaling may be high layer signaling, such as RRC, MAC signaling, to implement a semi-static, semi-persistent configuration, or PHY signaling, such as DCI, to enable dynamic configuration.
  • Method 2 The agreed way.
  • the terminal may select some Mn sub-bands with relatively fixed positions from the Kn sub-bands according to a manner agreed with the base station, for example:
  • Mn subbands contain the highest and lowest subbands of the Kn subbands
  • the Mn subbands are comb-like distributed in the Kn subbands.
  • the base station can determine the value of M by signaling the comb order.
  • Mode 3 The terminal decides itself according to the result of channel measurement.
  • the terminal performs channel measurement according to the reference signal, calculates RPI and PI on Kn subbands in the subband set n, and calculates CQI on Kn subbands based on information such as RPI, RI, PI, PMI, etc., and feeds back the best Mn of CQI. Bring the corresponding RPI, PI, and feed back the corresponding Mn subband numbers.
  • the terminal can determine the division of the subband set in the following three ways.
  • the terminal determines the values of N, Kn, and Mn according to the indication signaling of the base station.
  • the signaling may be high layer signaling, such as RRC, MAC signaling, to implement a semi-static, semi-persistent configuration, or PHY signaling, such as DCI, to enable dynamic configuration.
  • Mode B The terminal determines the values of N, Kn, and Mn according to an agreed manner, and the manner of the agreement includes at least one of the following:
  • Mn 1 or 2
  • Mn 1 or 2
  • n 1, ..., N, Mn are equal.
  • Mode C The terminal determines the values of N, Kn, and Mn according to channel measurements.
  • the terminal can calculate the RPI and PI on each sub-band and aggregate the sub-bands with the RPI and PI closer into the sub-band set. Specifically, the terminal calculates the RPI and the PI on the K subbands, and aggregates the subbands whose RPI or PI does not exceed the DR or DP into a subband set, where the DR or DP is a predefined value, or the terminal according to the base station letter. Let the DR or DP be determined.
  • the terminal feedbacks the values of N, Kn, and Mn.
  • a special way is that the terminal divides the K sub-bands into N sub-band sets, and only needs to feedback the value of N.
  • Mode D The terminal determines the values of N, Kn, and Mn according to channel measurements.
  • the terminal can aggregate the RPI and/or PI on each subband and aggregate the subbands that satisfy the RPI and/or PI to a certain subband.
  • the terminal aggregates the subbands with the similar changes in the information indicated by the RPI and/or PI on the subband into a subband set.
  • RPI and/or PI on different subbands have similar polynomial function variation laws, and these subbands are aggregated into subband set feedback.
  • the RPI and/or PI change rate with the change of the sub-band does not exceed the sub-band aggregation of the ER or EP into a sub-band set, and the ER or EP is a predefined value, or the terminal is based on The base station signaling determines the DR or DP.
  • the terminal feedbacks the values of N, Kn, and Mn.
  • a special way is that the terminal divides the K sub-bands into N sub-band sets, and only needs to feedback the value of N.
  • This implementation provides a specific implementation of channel information feedback.
  • the base station sends a reference signal to the terminal, and the terminal reports the CSI according to the measurement of the reference signal.
  • the CSI with multiple sub-bands needs feedback, and the terminal selects part of the sub-band feedback CSI according to the result of the channel measurement, and feeds back the information of the sub-band selection to the base station.
  • the subband selection information described herein includes at least one of the following:
  • the K subbands included in the feedback bandwidth are divided into N subband sets, the nth subband set includes Kn subbands, and Mn subbands are selected on the Kn subbands, indicating N subband set partitioning, Mn subband set selection Information.
  • the terminal feeds back the above information through the PUCCH or the PUSCH, and the feedback method includes at least one of the following:
  • the terminal feeds back M, N, Kn, and Mn related information in the first slot, and returns the RPI and PI information in the second slot, and the first slot is in front of the second slot;
  • the terminal feeds back M, N, Kn, and Mn related information on the first OFDM symbol or symbol group, and feeds back the RPI, PI information, the first OFDM symbol or symbol on the second OFDM symbol or symbol group.
  • the group is in front of the second OFDM symbol or symbol group;
  • the terminal maps M, N, Kn, and Mn information on the RE near the front-loaded DMRS, and maps the RPI and PI information on the lower RE.
  • the M, N, Kn, and Mn related information is mapped on the RE near the RI mapping position
  • an embodiment of the present invention further provides a storage medium, particularly a computer readable storage medium, such as a memory including a computer program, which may be executed by a processor of a device fed back by CSI to complete the foregoing Method described.
  • the computer readable storage medium may be a magnetic random access memory (Ferromagnetic Random Access Memory, FRAM for short), a read only memory (ROM), or a programmable read only memory (Programmable).
  • PROM Erasable Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • Electrically Erasable Programmable Read-Only Memory It is a memory such as an EEPROM), a flash memory, a magnetic surface memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM).

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Abstract

本申请提出一种信道状态信息反馈的方法、装置和存储介质。其中，方法包括：终端根据参考信号进行信道测量；从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数相位指示信息(PI)和/或相对功率指示信息(RPI)；其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。

Description

一种信道状态信息反馈的方法、装置和存储介质
相关申请的交叉引用
本申请基于申请号为201710458924.X、申请日为2017年06月16日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及但不限于信道质量检测领域。
背景技术
无线通信系统中，发送端和接收端一般会采用多根天线发送和接收来获取更高的速率。多输入多输出(multiple-input-multiple-output，简称为MIMO)技术的原理是利用信道的一些特征来形成匹配信道特征的多层传输，从而能够有效的提升系统性能，在不增加带宽和功率的基础上就获得显著的性能提升，是非常有前景的技术，在目前的系统中广泛应用。比如在长期演进(Long Term Evolution，简称为LTE)和其增强版本(Long Term Evolution-Advanced，简称为LTE-A)系统中有多种多天线技术传输的模式(传输模式2～传输模式10)。
一般而言，信道状态信息(Channel State Information，简称为CSI)有两种反馈方式，即周期性反馈和非周期性反馈，例如在LTE系统，利用上行控制信道(Physical Uplink Control Channel，简称为PUCCH)进行周期性反馈，利用物理上行共享信道(Physical uplink shared channel，简称为PUSCH)进行非周期性反馈。终端CSI的反馈主要存在两种方式：基站可以配置终端对信道信息进行测量和量化，并通过PUCCH对量化的CSI信息(包括秩指示符(Rank Indicator，简称为RI)/预编码矩阵指示符(Precoding Matrix Indicator，简称为PMI)/信道质量指示信息(Channel quality  indication，简称为CQI)进行周期性的反馈。基站还可以在需要时，非周期性的突然触发终端进行CSI信息(包括RI/PMI/CQI)的上报，它主要在PUSCH。以克服周期反馈实时性不够高，CSI量化精度受限于控制信道开销的问题。
基于码本的信道信息量化反馈的基本原理如下：
假设有限反馈信道容量为Bbps/Hz，那么可用的码字的个数为N＝2 B个。信道矩阵的特征矢量空间经过量化构成码本空间
Figure PCTCN2018090580-appb-000001
发射端与接收端共同保存或实时产生此码本(收发端相同)。根据接收端获得的信道矩阵H，接收端根据一定准则从
Figure PCTCN2018090580-appb-000002
中选择一个与信道最匹配的码字
Figure PCTCN2018090580-appb-000003
，并将码字序号i(也即PMI)反馈回发射端。发射端根据此序号i找到相应的预编码码字
Figure PCTCN2018090580-appb-000004
，从而获得信道信息，
Figure PCTCN2018090580-appb-000005
表示了信道的特征矢量信息。
LTE系统中码字构造的原理如下：
LTE的码本随着标准版本的演进，也在不断地演进，在版本Release 8和Release 9中4天线的码本和2天线的码本都是单码字的形式，只有一个PMI其值表示为i＝1,…,N 11，N 11为码字的个数。在Release 10的8天线码本和Release 12的4天线码本时，就是双码本反馈的形式了，即码字可以写成W＝W 1W 2的形式，而W 1是长期反馈的码本称为第一码本；W 2表示一个短期反馈的码本，称为第二码本，它的作用是在W 1码字里选择M 1个备选波束里的一个，并为同一个数据层的每个极化方向选择的波束选择极化相位Co-phasing，W 2里的每个码字用PMI 2量化和反馈，其值为i 2＝1,…,M 1，M 1为W 2的个数，具体的可以参考LTE Release 10协议。
在Release 12以前的码字都是针对1D天线阵列的，属于1D的码字，在Release 13的码本里设计里，由于使用了更多的天线，码本的维度变得更大了。天线的拓扑一般也是平面阵列的，即有两个维度方向的天线设计了2D的码字。从而第一码本W 1里的每个波束具有形式2维的形式
Figure PCTCN2018090580-appb-000006
其中，v m和u n分别为第一维度和第二维度的离散傅里叶矢量(Discrete Fourier Transform，简称为DFT)，
Figure PCTCN2018090580-appb-000007
表示v m和u n的kronecker乘积(克罗内克积)，m＝1,2,…,B 1，n＝1,2,…,B 2。第一维度端口(端口包括天线/port/端口/传输单元/阵子/阵元等可以发送信号的装置)数N 1个，第二维度端口数 N 2个，第一维度端口对应的DFT进行了O 1倍的过采样，第二维度的端口对应的DFT进行了O 2倍的过采样，上述第一维度或者第二维度天线的离散傅里叶矢量的个数是端口数目的过采样因子的倍数，所以有B 1＝N 1*O 1，B 2＝N 2*O 2，O 1为第一维度过采样因子，O 2为第二维度过采样因子。第一码本的第一维度码本用PMI 11表示，其值为i 11＝1,…,N 11，第一码本的第二维度的码本用PMI 12表示，其值为i 12＝1,…,N 12。对于上述的每一个PMI 11和PMI 12的索引，都有M 1个W 2码字，每个W 2码字就是为了从W 1里选择2维波束
Figure PCTCN2018090580-appb-000008
以及不同极化方向的Co-phasing，对应的码字索引为PMI 2，用i 2＝1,…,M 1表示。
不失一般性，把第一维度端口数N 11＝1或第二维度端口数N 12＝1的码字成为1D码字，而第一维度端口数N 11>1且第二维度端口数N 12>1的码字成为2D码字。如果是1D码字且是单码字结构用PMI或者i表示，如果是1D码字且在双码字结构中用PMI 1和PMI 2共同表示，索引由i 1/i 2共同表示，如果是2D码字用PMI 11，PMI 12，PMI 2三个码本索引共同表示或者由索引i 11，i 12，i 2共同表示。
当前的系统中，都是基于信道中的最强径信息进行反馈预编码矩阵或者配置波束，而忽略信道的其它径的信息，这样就会导致反馈或者配置的信息与信道不能很好的匹配，从而影响系统的性能。于是，为了解决这一问题，第三代合作伙伴计划(3rd Generation Partnership Project，简称为3GPP)关于第五代移动通信技术(5th-Generation，简称为5G)标准讨论中，在新无线接入技术(New Radio Access，简称为NR)系统引进了基于多条径信息做线性加权合并的码本，从而能够大幅度提升反馈精度进而提高系统的性能。在使用线性加权合并码本反馈CSI的方法中，信道信息被量化为多个波束的线性组合，即每一层的预编码码字是多个一维或二维DFT矢量的线性组合，每个一维或二维的DFT矢量可根据上文的方式利用PMI反馈，每个PMI相应的加权系数幅度可用相对功率指示信息(Relative Power Indicator，简称为RPI)反馈，加权系数相位可用相位指示信息(PI)反馈。
虽然基于多条径合并的线性码本能够更好的匹配信道，但是由于在合并的过程中需要反馈或者配置每一条径信息的幅度加权系数和相位加权系 数，这样会使得系统的开销非常的大。此外，由于RPI和PI都可能会通过子带反馈以获取更高的性能，现有技术中每个子带都反馈RPI和PI会带来更大的反馈开销。
发明内容
本公开实施例提供一种CSI反馈的方法、装置和存储介质。
本公开实施例采取的技术方案如下：
一种CSI反馈的方法，应用于终端，包括：
根据参考信号进行信道测量；
从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数PI和/或RPI；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
上述方案中，根据基站的配置信令或者与基站的约定确定M的取值。
上述方案中，从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI，包括以下至少之一：
根据基站的指示信令，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据与基站的预先约定，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据信道测量的结果，从K个子带中选取M个子带，上报M个子带的PI和/或RPI。
上述方案中，所述指示信令包括以下信令至少之一：物理层信令、无线资源控制(RRC)信令、媒体接入控制(MAC)信令、下行控制信息(DCI)和比特图。
上述方案中，根据与基站的预先约定的方式，从K个子带中选取M个子带，反馈M个子带的PI和/或RPI，约定的方式包括以下至少之一：
M个子带是K个子带中频率最低的子带；
M个子带是K个子带中频率最高的子带；
M个子带包含K个子带中频率最高和最低的子带；
M个子带在K个子带中呈梳状分布。
上述方案中，根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
上述方案中，所述的方法还包括：向基站反馈所述K个子带中CQI最好的M个子带的编号信息。
上述方案中，计算所述K个子带的CQI包括：
根据信道测量获得的PMI、RPI和PI计算CQI。
上述方案中，从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI，包括：
将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
上述方案中，将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
根据基站信令、根据约定的方式、根据信道测量的结果。
上述方案中，将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
上述方案中，根据基站的配置信令或者与基站的约定确定Mn的取值。
上述方案中，从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
上述方案中，根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
上述方案中，根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
Mn个子带是Kn个子带中的频率最低的子带；
Mn个子带是Kn个子带中的频率最高的子带；
Mn个子带包含Kn个子带中频率最高和最低的子带；
Mn个子带在Kn个子带中呈梳状分布。
上述方案中，根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
将所述K个子带平均划分为N个子带集合。
上述方案中，根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令确定所述DR或DP；
将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
上述方案中，向基站反馈所述N，Kn、Mn中至少之一的取值。
本公开实施例还提供一种CSI反馈的方法，应用于基站，包括：
接收终端上报的M个子带的预编码码本索引关联的加权系数PI和/或RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
上述方案中，所述的方法还包括：通过配置信令通知所述终端M的取值。
上述方案中，所述的方法还包括：通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
上述方案中，所述的方法还包括：通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
所述指示信令包括以下信令至少之一：物理层信令、RRC信令、MAC信令、DCI和比特图。
上述方案中，所述的方法还包括：接收所述终端反馈所述K个子带中M个子带的编号信息。
上述方案中，所述的方法还包括：通知所述终端将反馈带宽的K个子带划分为N个子带集合。
上述方案中，所述的方法还包括：通知所述终端，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
上述方案中，所述的方法还包括：通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带。
上述方案中，所述的方法还包括：通知所述终端在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
上述方案中，所述的方法还包括：接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
本公开实施例还提供一种CSI反馈的装置，设置于终端，包括：
测量模块，设置为根据参考信号进行信道测量；
反馈模块，设置为从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数PI和/或RPI；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
上述方案中，所述反馈模块，设置为根据基站的配置信令或者与基站的约定确定M的取值。
上述方案中，所述反馈模块从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI，包括以下至少之一：
根据基站的指示信令，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据与基站的预先约定，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据信道测量的结果，从K个子带中选取M个子带，上报M个子带的PI和/或RPI。
上述方案中，所述反馈模块根据与基站的预先约定的方式，从K个子带中选取M个子带，反馈M个子带的PI和/或RPI，约定的方式包括以下至少之一：
M个子带是K个子带中频率最低的子带；
M个子带是K个子带中频率最高的子带；
M个子带包含K个子带中频率最高和最低的子带；
M个子带在K个子带中呈梳状分布。
上述方案中，所述反馈模块根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
上述方案中，所述反馈模块，还设置为：向基站反馈所述K个子带中CQI最好的M个子带的编号信息。
上述方案中，所述反馈模块计算所述K个子带的CQI包括：
根据信道测量获得的PMI、RPI和PI计算CQI。
上述方案中，所述反馈模块从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI，包括：
将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
上述方案中，所述反馈模块将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
根据基站信令、根据约定的方式、根据信道测量的结果。
上述方案中，将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
上述方案中，根据基站的配置信令或者与基站的约定确定Mn的取值。
上述方案中，所述反馈模块从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
上述方案中，所述反馈模块根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
上述方案中，所述反馈模块根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
Mn个子带是Kn个子带中的频率最低的子带；
Mn个子带是Kn个子带中的频率最高的子带；
Mn个子带包含Kn个子带中频率最高和最低的子带；
Mn个子带在Kn个子带中呈梳状分布。
上述方案中，所述反馈模块根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
将所述K个子带平均划分为N个子带集合。
上述方案中，所述反馈模块根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令确定所述DR或DP；
将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
上述方案中，所述反馈模块向基站反馈所述N，Kn、Mn中至少之一的取值。
本公开实施例还提供一种CSI反馈的装置，设置于基站，包括：
通信模块，设置为接收终端上报的M个子带的预编码码本索引关联的加权系数PI和/或RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
上述方案中，所述通信模块，还设置为：通过配置信令通知所述终端M的取值。
上述方案中，所述通信模块，还设置为：通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
上述方案中，所述通信模块，还设置为：通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
上述方案中，所述通信模块，还设置为：接收所述终端反馈所述K个子带中M个子带的编号信息。
上述方案中，所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带划分为N个子带集合。
上述方案中，所述通信模块，还设置为：通知所述终端，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
上述方案中，所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；
上述方案中，所述通信模块，还设置为：通知所述终端在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
上述方案中，所述通信模块，还设置为：接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
本公开实施例还提供了一种存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述终端侧任一方法的步骤，或者实现基站侧任一方法的步骤。
本公开实施例和现有技术相比，具有如下有益效果：
本公开实施例的技术方案，不反馈每个子带的RPI和PI，只反馈部分子带的RPI和PI。这样，首先可以减小反馈开销；其次，由于RPI和PI指示的幅度和相位信息在不同子带上具有一定的相关性，基站利用M个子带 可以插值出其他子带的信息，因此，CSI反馈性能也可以得到保证，能够解决使用线性合并码本技术反馈CSI时，CSI反馈开销过大的问题。
附图说明
图1为本公开实施例的一种线性组合码本反馈的示意图；
图2为本公开实施例的一种CSI反馈的方法的流程图；
图3为本公开实施例的另一种CSI反馈的方法的流程图；
图4为本公开实施例的一种CSI反馈的装置的结构示意图；
图5为本公开实施例的一种CSI反馈的装置的结构示意图；
图6为本公开实施例1的子带反馈示意图；
图7为本公开实施例2的子带反馈示意图；
图8为本公开实施例1的梳状分布示意图。
具体实施方式
为使本公开的发明目的、技术方案和有益效果更加清楚明了，下面结合附图对本公开的实施例进行说明，需要说明的是，在不冲突的情况下，本申请中的实施例和实施例中的特征可以相互任意组合。
如图1所示，在使用线性加权合并码本反馈CSI的方法中，终端根据参考信号测量出的信道信息被量化为多个波束的线性组合，即每一层的预编码码字是多个一维或二维DFT矢量的线性组合，图1中，选出的波束向量c 0，c 1和c 2可以通过传统的PMI进行量化反馈，用于对这些PMI进行加权合并的系数包括幅度信息λ 1、λ 2和相位信息α 1、α 2，幅度信息可以通过选择RPI进行量化反馈，相位信息可以通过选择PI进行量化反馈。和传统的单径码本PMI反馈相比，由于需要反馈每个波束对应的RPI和PI信息，反馈开销大幅度增加。
一般来说，无线信道中波束信息的频率选择性较弱，因此，在线性组合码本反馈中，指示作为基向量的波束PMI信息可以通过宽带反馈报告给基站。加权系数的相位主要受到延时、随机相位等因素的影响，频率选择 性较强，因此，PI需要子带反馈。对于加权系数的幅度信息，即RPI，宽带反馈可以保证较好的性能，而子带反馈可以进一步提升性能，但是带来较大的开销，因此，可以根据需求配置为宽带反馈或子带反馈。综上，高性能的线性组合码本反馈需要各个波束的RPI和PI都子带反馈。
为实现子带反馈RPI和PI，一种较为简单的做法是每个子带对应的RPI和PI都反馈，这会带来较大的性能开销。对于PI指示的加权相位系数，主要受到两方面因素影响，一是随机初相，二是时延在频域造成的相位变化。对于随机初相，每个极化方向的相位变化在各个子带上都可以视为定值，对于时延，在频域造成的相位变化可以视为随着频率呈线性变化。因此，PI指示的相位在不同频带上的变换可以用线性、分段线性或者其他类型的函数进行建模。而对于RPI指示的幅度信息，在不同频带上只受一些微小的随机因素的影响，整体趋于平稳。综上，同一个波束对应的PI和RPI在不同子带上指示的幅度和相位具有一定的相关性。
本公开实施例中，利用PI和RPI指示的幅度和相位系数在不同子带上的相关性，可以减小子带反馈的开销。一种简单的方法是不用反馈每个子带的RPI和PI，只反馈部分子带的RPI和PI，给出了一种开销减小的子带反馈方式。
如图2所示，本公开实施例提供一种CSI反馈的方法，应用于终端，包括：
S101、根据参考信号进行信道测量；
S102、从CSI反馈带宽的K个子带中，选取M个子带，作为反馈预编码码本索引关联的加权系数PI和/或RPI反馈的子带；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
本公开实施例中，PI和/或RPI反馈带宽共包含K个子带，终端反馈K个子带中的M个子带对应的RPI和/或PI，M是大于0且小于K的整数，这样，既可以减小反馈开销；又由于RPI和PI指示的幅度和相位信息在不同子带上具有一定的相关性，基站利用M个子带可以插值出其他子带的信息，因此，CSI反馈性能也可以得到保证。
其中，M取值的确定包括以下至少之一：根据基站的配置信令或者与基站的约定。
步骤S102中，从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI包括以下至少之一：
方式一、根据基站的指示信令，从K个子带中选取M个子带作为上报PI和/或RPI的子带；
方式二、根据与基站的预先约定，从K个子带中选取M个子带作为上报PI和/或RPI的子带；
方式三、根据信道测量的结果，从K个子带中选取M个子带作为上报PI和/或RPI的子带；
方式四、将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
方式一中，所述指示信令包括以下信令至少之一：物理层信令、RRC信令、MAC信令、DCI和比特图。
方式二中，根据与基站的预先约定的方式，从K个子带中选取M个子带作为上报PI和/或RPI的子带，约定的方式包括以下至少之一：
M个子带是K个子带中频率最低的子带；
M个子带是K个子带中频率最高的子带；
M个子带包含K个子带中频率最高和最低的子带；
M个子带在K个子带中呈梳状分布。
方式三的根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
在一实施例中，方式三中，所述终端还可以向基站反馈所述K个子带中CQI最好的M个子带的编号信息。计算所述K个子带的CQI包括：根据信道测量获得的PMI、RPI和PI计算CQI。
方式四中，将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
根据基站信令、根据约定的方式、根据信道测量的结果。
方式四中，将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。根据基站的配置信令或者与基站的约定确定Mn的取值。
在一实施例中，向基站反馈所述N，Kn、Mn中至少之一的取值。
从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
其中，根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
其中，根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
Mn个子带是Kn个子带中的频率最低的子带；
Mn个子带是Kn个子带中的频率最高的子带；
Mn个子带包含Kn个子带中频率最高和最低的子带；
Mn个子带在Kn个子带中呈梳状分布。
根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
将所述K个子带平均划分为N个子带集合。
根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令确定所述DR或DP；
将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
如图3所示，本公开实施例还提供一种CSI反馈的方法，应用于基站，包括：
S201、接收终端上报的M个子带的预编码码本索引关联的加权系数PI和/或RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
S202、根据所述M个子带的PI和/或RPI的幅度和相位在子带之间的相关性，确定K个子带的CSI；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
所述基站还可以通过配置信令通知所述终端M的取值。
所述基站还可以通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
所述基站还可以通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
其中，所述指示信令包括以下信令至少之一：物理层信令、RRC信令、MAC信令、DCI和比特图。
所述基站还接收所述终端反馈所述K个子带中M个子带的编号信息。
在一实施例中，通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
通知所述终端将反馈带宽的K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
具体地，通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
所述基站还接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
为了实现本公开实施例的方法，如图4所示，本公开实施例还提供一种CSI反馈的装置，设置于终端，包括：
测量模块，设置为根据参考信号进行信道测量；
反馈模块，设置为从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数PI和/或RPI；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
所述反馈模块，设置为根据基站的配置信令或者与基站的约定确定M的取值。
所述反馈模块从CSI反馈带宽的K个子带中，选取M个子带反馈PI和/或RPI，包括以下至少之一：
根据基站的指示信令，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据与基站的预先约定，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
根据信道测量的结果，从K个子带中选取M个子带，上报M个子带的PI和/或RPI。
所述反馈模块根据与基站的预先约定的方式，从K个子带中选取M个 子带，约定的方式包括以下至少之一：
M个子带是K个子带中频率最低的子带；
M个子带是K个子带中频率最高的子带；
M个子带包含K个子带中频率最高和最低的子带；
M个子带在K个子带中呈梳状分布。
所述反馈模块根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
所述反馈模块，还设置为：向基站反馈所述K个子带中CQI最好的M个子带的编号信息。
所述反馈模块计算所述K个子带的CQI包括：
根据信道测量获得的预编码指示信息PMI、相对功率指示信息RPI和相位指示信息PI计算CQI。
所述反馈模块将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
根据基站信令、根据约定的方式、根据信道测量的结果。
将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
根据基站的配置信令或者与基站的约定确定Mn的取值。
所述反馈模块从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
所述反馈模块根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
所述反馈模块根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
Mn个子带是Kn个子带中的频率最低的子带；
Mn个子带是Kn个子带中的频率最高的子带；
Mn个子带包含Kn个子带中频率最高和最低的子带；
Mn个子带在Kn个子带中呈梳状分布。
所述反馈模块根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
将所述K个子带平均划分为N个子带集合。
所述反馈模块根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令确定所述DR或DP；
将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
所述反馈模块向基站反馈所述N，Kn、Mn中至少之一的取值。
实际应用时，测量模块和反馈模块可由CSI反馈的装置中的处理器结 合通信接口实现。
为实现本公开实施例的方法，如图5所示，本公开实施例还提供一种CSI反馈的装置，设置于基站，包括：
通信模块，设置为接收终端上报的M个子带的预编码码本索引关联的加权系数PI和/或RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
确定模块，设置为根据所述M个子带的PI和/或RPI的幅度和相位在子带之间的相关性，确定K个子带的CSI；
其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
所述通信模块，还设置为：通过配置信令通知所述终端M的取值。
所述通信模块，还设置为：通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
所述通信模块，还设置为：通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
所述通信模块，还设置为：接收所述终端反馈所述K个子带中M个子带的编号信息。
所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带划分为N个子带集合。
所述通信模块，还设置为：通知所述终端，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；
所述通信模块，还设置为：通知所述终端在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
所述通信模块，还设置为：接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
实际应用时，所述通信模块可由CSI反馈的装置中的处理器结合通信接口实现；所述确定模块可由CSI反馈的装置中的处理器实现。
需要说明的是：上述实施例提供的CSI反馈的装置在进行CSI反馈时，仅以上述各程序模块的划分进行举例说明，实际应用中，可以根据需要而将上述处理分配由不同的程序模块完成，即将装置的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。另外，上述实施例提供的CSI反馈的装置与CSI反馈的方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
实施例1
本实施例结合图6，说明从CSI反馈带宽的K个子带中，选取M个子带，具体包括：
终端可以通过多种方式确定M的取值，以及K个子带中的M个子带：
方式一：基站信令通知。基站可以通过高层或物理层信令通知终端在K个子带中的M个子带上反馈RPI和/或PI。例如，基站可以通过比特图的方式通知终端如何从K个子带中选出M个子带。该信令可以是高层信令，例如RRC、MAC信令，以实现半静态、半持续的配置，或是PHY信令，例如DCI，以实现动态的配置。
方式二：约定的方式。终端可以根据和基站约定的方式，从K个子带中选出一些位置相对固定的M个子带，例如：
1.M个子带是K个子带中频率最低的子带
2.M个子带是K个子带中频率最高的子带
3.M个子带包含K个子带中频率最高和最低的子带
4.M个子带在K个子带中呈梳状分布(如图8所示)，此时基站可以通过信令通知梳分阶数来确定M取值。
方式三：终端根据信道测量的结果自行决定。终端根据参考信号进行信道测量，计算得到各个子带上的RPI、PI，并基于RPI、RI、PI、PMI等信息计算各个子带上的CQI，反馈CQI最好的M个子带对应的RPI、PI， 并反馈对应的M个子带编号。
基于上述方法，可以在保证CSI反馈性能的基础上，减小子带RPI、PI反馈的开销。
实施例2
本实施例给出了信道信息量化反馈的一种具体实施方式。在本实施例中，CSI反馈带宽中的K个子带被分为N个子带集合，每个子带集合包含Kn个子带。终端反馈RPI和PI时，在第n个子带集合的Kn个子带中选择Mn个子带反馈对应的RPI和PI，如图7所示。
终端可以通过多种方式确定如何在第n个子带集合的Kn个子带中选择Mn个子带反馈对应的RPI和PI。
方式一：基站信令通知。基站可以通过高层或物理层信令通知终端在Kn个子带中的Mn个子带上反馈RPI和/或PI。例如，基站可以通过比特图的方式通知终端如何从Kn个子带中选出Mn个子带。该信令可以是高层信令，例如RRC、MAC信令，以实现半静态、半持续的配置，或是PHY信令，例如DCI，以实现动态的配置。
方式二：约定的方式。终端可以根据和基站约定的方式，从Kn个子带中选出一些位置相对固定的Mn个子带，例如：
1.Mn个子带是Kn个子带中频率最低的子带
2.Mn个子带是Kn个子带中频率最高的子带
3.Mn个子带包含Kn个子带中频率最高和最低的子带
4.Mn个子带在Kn个子带中呈梳状分布，此时基站可以通过信令通知梳分阶数来确定M取值
方式三：终端根据信道测量的结果自行决定。终端根据参考信号进行信道测量，计算得到子带集合n中Kn个子带上的RPI、PI，并基于RPI、RI、PI、PMI等信息计算Kn个子带上的CQI，反馈CQI最好的Mn个子带对应的RPI、PI，并反馈对应的Mn个子带编号。
该方法另一个需要解决的问题是如何进行子带集合的划分。终端可以 通过以下三种方式确定子带集合的划分。
方式A：终端根据基站指示信令确定N、Kn、Mn的取值。该信令可以是高层信令，例如RRC、MAC信令，以实现半静态、半持续的配置，或是PHY信令，例如DCI，以实现动态的配置。
方式B：终端根据约定的方式确定N、Kn、Mn的取值，所述约定的方式至少包括以下之一：
1.Mn的值为1或2，即每个子带集合选出1个或2个子带进行对应的RPI、PI上报。
2.对于n＝1，…，N，Kn都相等，即K个子带均分为N个子带集合。
3.对于n＝1，…，N，Mn都相等。
方式C：终端根据信道测量确定N、Kn、Mn的取值。终端可以通过计算各个子带上的RPI和PI，并将RPI和PI较为接近的子带聚合成为子带集合。具体来说，终端计算K个子带上的RPI和PI，将RPI或PI相差不超过DR或DP的子带聚合为子带集合，所述DR或DP是预定义的数值，或者终端根据基站信令确定所述DR或DP。终端反馈N，Kn，Mn的取值。一种特殊的方式是，终端将K个子带均分为N个子带集合，只需反馈N的取值。
方式D：终端根据信道测量确定N、Kn、Mn的取值。终端可以通过计算各个子带上的RPI和/或PI，并将RPI和/或PI满足一定规律的子带聚合成为子带集合。终端将子带上RPI和/或PI指示的信息具有相近变化规律的子带聚合成为子带集合。具体来说，不同子带上RPI和/或PI具有相近的多项式函数变化规律，将这些子带聚合为子带集合反馈。特殊的，不同子带上，RPI和/或PI随着子带变化的变化率相差不超过ER或EP的子带聚合为子带集合，所述ER或EP是预定义的数值，或者终端根据基站信令确定所述DR或DP。终端反馈N，Kn，Mn的取值。一种特殊的方式是，终端将K个子带均分为N个子带集合，只需反馈N的取值。
利用上述的方法，在信道估计受到频率选择性的噪声或者干扰影响时，也能保证较好的反馈性能，并减小反馈开销。
实施例3
本实施给出了信道信息反馈的一种具体实现方式。基站发送参考信号给终端，终端根据对参考信号的测量上报CSI。在CSI反馈带宽上，有多个子带的CSI需要反馈，终端根据信道测量的结果，选取部分的子带反馈CSI，并将子带选择的信息反馈给基站。这里所述子带选择的信息，包括以下至少之一：
1.从反馈带宽包含的K个子带中选择M个子带反馈RPI和/或PI，指示M个子带选择的信息；
2.将反馈带宽包含的K个子带分为N个子带集合，第n个子带集合包含Kn个子带，在这Kn个子带上选择Mn个子带，指示N个子带集合划分、Mn个子带集合选择的信息。
终端通过PUCCH或PUSCH反馈上述这些信息，反馈的方式至少包含以下之一：
1.PUCCH反馈中，终端在第一slot反馈M、N、Kn、Mn相关信息，在第二slot反馈RPI、PI信息，第一slot在第二slot前面；
2.长格式PUCCH反馈中，终端在第一OFDM符号或符号组上反馈M、N、Kn、Mn相关信息，在第二OFDM符号或符号组上反馈RPI、PI信息，第一OFDM符号或符号组在第二OFDM符号或符号组的前面；
3.PUSCH反馈中，终端在front-loaded DMRS附近RE上映射M、N、Kn、Mn相关信息，在靠后的RE上映射RPI、PI信息；
4.M、N、Kn、Mn相关信息映射在RI映射位置的附近RE上；
5.M、N、Kn、Mn相关信息和RI联合反馈。
在示例性实施例中，本发明实施例还提供了一种存储介质，具体为计算机可读存储介质，例如包括计算机程序的存储器，上述计算机程序可由CSI反馈的装置的处理器执行，以完成前述方法所述步骤。计算机可读存储介质可以是、磁性随机存取存储器(Ferromagnetic Random Access Memory，简称为Programmable Read-Only Memory，FRAM)、只读存储器(Read Only Memory，简称为ROM)、可编程只读存储器(Programmable Read-Only  Memory，简称为PROM)、可擦除可编程只读存储器(Erasable Programmable Read-Only Memory，简称为EPROM)、电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，简称为EEPROM)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(Compact Disc Read-Only Memory，简称为CD-ROM)等存储器。
虽然本公开所揭示的实施方式如上，但其内容只是为了便于理解本公开的技术方案而采用的实施方式，并非用于限定本公开。任何本公开所属技术领域内的技术人员，在不脱离本公开所揭示的核心技术方案的前提下，可以在实施的形式和细节上做任何修改与变化，但本公开所限定的保护范围，仍须以所附的权利要求书限定的范围为准。

Claims (57)

  1. 一种信道状态信息反馈的方法，应用于终端，包括：
    根据参考信号进行信道测量；
    从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数相位指示信息PI和/或相对功率指示信息RPI；
    其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
  2. 如权利要求1所述的方法，其中：根据基站的配置信令或者与基站的约定确定M的取值。
  3. 如权利要求1或2所述的方法，其中：从CSI反馈带宽的K个子带中，选取M个子带反馈相位指示PI和/或相对功率指示RPI，包括以下至少之一：
    根据基站的指示信令，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
    根据与基站的预先约定，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
    根据信道测量的结果，从K个子带中选取M个子带，上报M个子带的PI和/或RPI。
  4. 如权利要求3所述的方法，其中：所述指示信令包括以下信令至少之一：物理层信令、无线资源控制RRC信令、媒体接入控制MAC信令、下行控制信息DCI和比特图。
  5. 如权利要求3所述的方法，其中：根据与基站的预先约定的方式，从K个子带中选取M个子带，反馈M个子带的PI和/或RPI，约定的方式包括以下至少之一：
    M个子带是K个子带中频率最低的子带；
    M个子带是K个子带中频率最高的子带；
    M个子带包含K个子带中频率最高和最低的子带；
    M个子带在K个子带中呈梳状分布。
  6. 如权利要求3所述的方法，其中：根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
    计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
  7. 如权利要求6所述的方法，其中：还包括：向基站反馈所述K个子带中CQI最好的M个子带的编号信息。
  8. 如权利要求6所述的方法，其中：计算所述K个子带的CQI包括：
    根据信道测量获得的预编码指示信息PMI、RPI和PI计算CQI。
  9. 如权利要求1或2所述的方法，其中：从CSI反馈带宽的K个子带中，选取M个子带反馈相位指示信息PI和/或相对功率指示信息RPI，包括：
    将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
  10. 如权利要求9所述的方法，其中：将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
    根据基站信令、根据约定的方式、根据信道测量的结果。
  11. 如权利要求9所述的方法，其中：将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
    反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
  12. 如权利要求10所述的方法，其中：根据基站的配置信令或者与基站的约定确定Mn的取值。
  13. 如权利要求9或11所述的方法，其中：从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
    根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作 为上报PI和/或RPI的子带；
    根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
    根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
  14. 如权利要求13所述的方法，其中：根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
    计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
  15. 如权利要求13所述的方法，其中：根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
    Mn个子带是Kn个子带中的频率最低的子带；
    Mn个子带是Kn个子带中的频率最高的子带；
    Mn个子带包含Kn个子带中频率最高和最低的子带；
    Mn个子带在Kn个子带中呈梳状分布。
  16. 如权利要求9或11所述的方法，其中：根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
    将所述K个子带平均划分为N个子带集合。
  17. 如权利要求13所述的方法，其中：根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
    将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令确定所述DR或DP；
    将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
  18. 如权利要求11所述的方法，其中：向基站反馈所述N，Kn、Mn中至少之一的取值。
  19. 一种信道状态信息反馈的方法，应用于基站，包括：
    接收终端上报的M个子带的预编码码本索引关联的加权系数相位指示信息PI和/或相对功率指示信息RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
    其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
  20. 如权利要求19所述的方法，其中：还包括：通过配置信令通知所述终端M的取值。
  21. 如权利要求19所述的方法，其中：还包括：通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
  22. 如权利要求19所述的方法，其中：还包括：通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
  23. 如权利要求22所述的方法，其中：所述指示信令包括以下信令至少之一：物理层信令、无线资源控制RRC信令、媒体接入控制MAC信令、下行控制信息DCI和比特图。
  24. 如权利要求19所述的方法，其中：还包括：接收所述终端反馈所述K个子带中M个子带的编号信息。
  25. 如权利要求19所述的方法，其中：
    通知所述终端将反馈带宽的K个子带划分为N个子带集合。
  26. 如权利要求19所述的方法，其中：
    通知所述终端，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
  27. 如权利要求19所述的方法，其中：
    通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带。
  28. 如权利要求19所述的方法，其中：
    通知所述终端在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
  29. 如权利要求19所述的方法，其中：接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
  30. 一种信道状态信息反馈的装置，设置于终端，包括：
    测量模块，设置为根据参考信号进行信道测量；
    反馈模块，设置为从CSI反馈带宽的K个子带中，选取M个子带，向基站上报所述M个子带的预编码码本索引关联的加权系数相位指示信息PI和/或相对功率指示信息RPI；
    其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
  31. 如权利要求30所述的装置，其中：所述反馈模块，设置为根据基站的配置信令或者与基站的约定确定M的取值。
  32. 如权利要求30或31所述的装置，其中：所述反馈模块从CSI反馈带宽的K个子带中，选取M个子带反馈相位指示信息PI和/或相对功率指示信息RPI，包括以下至少之一：
    根据基站的指示信令，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
    根据与基站的预先约定，从K个子带中选取M个子带，上报M个子带的PI和/或RPI；
    根据信道测量的结果，从K个子带中选取M个子带，上报M个子带的PI和/或RPI。
  33. 如权利要求32所述的装置，其中：所述反馈模块根据与基站的预先约定的方式，从K个子带中选取M个子带，反馈M个子带的PI和/或RPI，约定的方式包括以下至少之一：
    M个子带是K个子带中频率最低的子带；
    M个子带是K个子带中频率最高的子带；
    M个子带包含K个子带中频率最高和最低的子带；
    M个子带在K个子带中呈梳状分布。
  34. 如权利要求32所述的装置，其中：所述反馈模块根据信道测量的结果信息，从K个子带中选取M个子带作为上报PI和/或RPI的子带包括：
    计算所述K个子带的CQI，将K个子带中CQI最好的M个子带作为上报PI和/或RPI的子带。
  35. 如权利要求34所述的装置，其中：所述反馈模块，还设置为：向基站反馈所述K个子带中CQI最好的M个子带的编号信息。
  36. 如权利要求34所述的装置，其中：所述反馈模块计算所述K个子带的CQI包括：
    根据信道测量获得的预编码指示信息PMI、RPI和PI计算CQI。
  37. 如权利要求30或31所述的装置，其中：所述反馈模块从CSI反馈带宽的K个子带中，选取M个子带反馈相位指示信息PI和/或相对功率指示信息RPI，包括：
    将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
  38. 如权利要求37所述的装置，其中：所述反馈模块将反馈带宽的K个子带划分为N个子带集合的方式包含以下至少之一：
    根据基站信令、根据约定的方式、根据信道测量的结果。
  39. 如权利要求37所述的装置，其中：将所述K个子带划分为N个子带集合，从每个所述子带集合中确定一个或者多个子带包括：
    反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带；在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
  40. 如权利要求38所述的装置，其中：根据基站的配置信令或者与基站的约定确定Mn的取值。
  41. 如权利要求37或39所述的装置，其中：所述反馈模块从每个所述子带集合中确定一个或者多个子带的方式包括以下至少之一：
    根据基站的指示信令，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
    根据与基站的预先约定，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带；
    根据信道测量的结果，从每个所述子带集合中选取对应个数的子带作为上报PI和/或RPI的子带。
  42. 如权利要求41所述的装置，其中：所述反馈模块根据信道测量的结果信息，从每个所述子带集合中选取对应个数的子带作为上报PI或RPI的子带包括：
    计算所述K个子带的CQI，在第n个子带集合的Kn个子带中选取CQI最高的Mn个子带反馈对应的RPI和/或PI，和/或指示Mn个子带的信息。
  43. 如权利要求41所述的装置，其中：所述反馈模块根据约定的方式，在第n个子带集合的Kn个子带中选取Mn个子带反馈对应的RPI和/或PI包括以下至少之一：
    Mn个子带是Kn个子带中的频率最低的子带；
    Mn个子带是Kn个子带中的频率最高的子带；
    Mn个子带包含Kn个子带中频率最高和最低的子带；
    Mn个子带在Kn个子带中呈梳状分布。
  44. 如权利要求37或39所述的装置，其中：所述反馈模块根据约定的方式，将所述K个子带划分为N个子带集合，至少包括：
    将所述K个子带平均划分为N个子带集合。
  45. 如权利要求41所述的装置，其中：所述反馈模块根据信道测量的结果，将所述K个子带划分为N个子带集合的方法包括以下至少之一：
    将预编码码本索引关联的RPI或PI指示的信息相差不超过DR或DP的子带组成子带集合，所述DR或DP是预定义的数值；或者根据基站信令 确定所述DR或DP；
    将预编码码本索引关联的RPI或PI指示的信息随子带变化的变化率相差不超过ER或EP的子带组成子带集合，所述ER或EP是预定义的数值，或者根据基站信令确定所述ER或EP。
  46. 如权利要求39所述的装置，其中：所述反馈模块向基站反馈所述N，Kn、Mn中至少之一的取值。
  47. 一种信道状态信息反馈的装置，设置于基站，包括：
    通信模块，设置为接收终端上报的M个子带的预编码码本索引关联的加权系数相位指示信息PI和/或相对功率指示信息RPI；所述M个子带为所述终端从CSI反馈带宽的K个子带中选取的；
    其中，M和K均为大于或等于1的整数，且M<K，所述子带为R个资源块RB的集合，R为大于或等于1的整数。
  48. 如权利要求47所述的装置，其中：所述通信模块，还设置为：通过配置信令通知所述终端M的取值。
  49. 如权利要求47所述的装置，其中：所述通信模块，还设置为：通过配置信令通知终端所述M个子带在K个子带中梳分阶数的信息。
  50. 如权利要求47所述的装置，其中：所述通信模块，还设置为：通过指示信令通知所述终端从K个子带中选取M个子带作为上报PI和/或RPI的子带。
  51. 如权利要求47所述的装置，其中：所述通信模块，还设置为：接收所述终端反馈所述K个子带中M个子带的编号信息。
  52. 如权利要求47所述的装置，其中：
    所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带划分为N个子带集合。
  53. 如权利要求47所述的装置，其中：
    所述通信模块，还设置为：通知所述终端，从每个所述子带集合中确定一个或者多个子带，组成M个子带作为上报PI和/或RPI的子带。
  54. 如权利要求47所述的装置，其中：
    所述通信模块，还设置为：通知所述终端将反馈带宽的K个子带分为N个子带集合，第n个所述子带集合中包括Kn个子带。
  55. 如权利要求47所述的装置，其中：
    所述通信模块，还设置为：通知所述终端在第n个子带集合中确定Mn个子带，作为上报PI或RPI的子带；n为大于或等于1的整数，且n≤N。
  56. 如权利要求47所述的装置，其中：所述通信模块，还设置为：接收所述终端反馈的子带集合个数，每个子带集合中子带个数、每个子带集合中反馈PI和/或RPI的子带个数中至少之一的取值。
  57. 一种存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现权利要求1至18任一项所述方法的步骤，或者实现权利要求19至29任一项所述方法的步骤。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111628844A (zh) * 2019-02-27 2020-09-04 电信科学技术研究院有限公司 一种信道状态信息反馈方法及装置

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108111200A (zh) * 2017-06-16 2018-06-01 中兴通讯股份有限公司 一种信道状态信息反馈的方法和装置
CN109474322B (zh) * 2017-09-08 2021-05-18 华为技术有限公司 一种信道反馈的方法及相关设备
CN111316692B (zh) * 2017-11-17 2022-04-26 华为技术有限公司 信道状态信息的反馈方法、通信装置和系统
WO2019242024A1 (zh) * 2018-06-22 2019-12-26 Oppo广东移动通信有限公司 码本处理方法、系统、网络设备、用户设备及存储介质
CN110635883B (zh) * 2018-06-25 2022-09-27 中兴通讯股份有限公司 信息反馈方法及装置，存储介质，电子装置
CN110958043B (zh) * 2018-09-27 2021-08-31 大唐移动通信设备有限公司 一种信道状态信息的反馈方法及装置、终端和基站
WO2020061928A1 (en) 2018-09-27 2020-04-02 Qualcomm Incorporated Subband-granularity linear combination for a csi codebook
CN110958701B (zh) * 2018-09-27 2023-11-24 大唐移动通信设备有限公司 信道状态信息的反馈方法、预编码矩阵的确定方法及装置
CN110972195A (zh) 2018-09-28 2020-04-07 维沃移动通信有限公司 一种传输处理方法、终端及控制节点
CN110971280A (zh) * 2018-09-28 2020-04-07 华为技术有限公司 一种信道状态信息反馈的方法、设备及系统
CN111010218B (zh) * 2018-10-08 2021-06-22 华为技术有限公司 指示和确定预编码向量的方法以及通信装置
CN110535512B (zh) * 2018-10-31 2023-06-30 中兴通讯股份有限公司 一种报告天线端口加权矢量的方法、装置和系统
CN110535513A (zh) * 2018-11-02 2019-12-03 中兴通讯股份有限公司 一种csi反馈及接收方法、装置、存储介质
WO2020118549A1 (en) 2018-12-12 2020-06-18 Qualcomm Incorporated Coefficients report for compressed csi feedback
WO2020124589A1 (en) * 2018-12-21 2020-06-25 Qualcomm Incorporated Beam-strength related type-ii channel state information coefficient feedback
CN111436075B (zh) * 2019-01-11 2022-04-01 大唐移动通信设备有限公司 信道状态信息的上报方法、解码方法、终端及网络侧设备
WO2020150854A1 (en) * 2019-01-21 2020-07-30 Qualcomm Incorporated Feedback overhead reduction
WO2020155016A1 (en) 2019-01-31 2020-08-06 Qualcomm Incorporated Codebook design with differential phase feedback in frequency domain
CN111865372B (zh) * 2019-04-30 2021-06-08 华为技术有限公司 一种用于构建预编码矩阵的系数指示方法和通信装置
CN111934734B (zh) * 2019-05-13 2022-02-22 大唐移动通信设备有限公司 Csi上报方法、csi接收方法、终端和网络侧设备
CN112104396B (zh) * 2019-06-17 2021-12-14 华为技术有限公司 一种通信方法、网络设备、终端设备及存储介质
US10903870B1 (en) * 2019-07-15 2021-01-26 Cypress Semiconductor Corporation Angle of propagation estimation in a multipath communication system
CN112448743B (zh) 2019-08-30 2022-06-14 华为技术有限公司 信道测量的方法和通信装置
WO2022036720A1 (zh) * 2020-08-21 2022-02-24 Oppo广东移动通信有限公司 码本处理方法、终端设备和网络设备
US11290170B1 (en) * 2020-11-04 2022-03-29 Qualcomm Incorporated Sub-terahertz sub-band flattening feedback
CN113703441B (zh) * 2021-08-04 2023-03-10 北京三快在线科技有限公司 一种无人设备的控制方法、装置及系统
US20230308992A1 (en) * 2022-03-24 2023-09-28 Qualcomm Incorporated Measurements of linear combinations of beams
EP4515687A1 (en) * 2022-08-22 2025-03-05 ZTE Corporation Method for channel state information report and apparatus thereof
CN118826799A (zh) * 2023-04-19 2024-10-22 中兴通讯股份有限公司 一种信道信息反馈方法、电子设备和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118218A (zh) * 2010-01-06 2011-07-06 华为技术有限公司 信道状态信息的反馈方法和用户设备
CN102801498A (zh) * 2012-07-25 2012-11-28 电信科学技术研究院 一种终端设备选择子带反馈的上报及确定方法和设备
WO2017082634A1 (en) * 2015-11-11 2017-05-18 Samsung Electronics Co., Ltd. Method and apparatus for reduced feedback mimo
CN108111200A (zh) * 2017-06-16 2018-06-01 中兴通讯股份有限公司 一种信道状态信息反馈的方法和装置

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8179775B2 (en) * 2007-08-14 2012-05-15 Texas Instruments Incorporated Precoding matrix feedback processes, circuits and systems
CN101400074A (zh) * 2007-09-28 2009-04-01 夏普株式会社 减少预编码矩阵索引号反馈量的方法、用户设备及系统
CN102017690B (zh) * 2008-04-25 2013-11-06 夏普株式会社 移动通信系统、基站装置、移动台装置以及移动通信方法
CN102077681B (zh) * 2009-04-30 2014-12-31 华为技术有限公司 信道状态信息上报方法、信道估计方法终端设备和基站
CN101834708B (zh) * 2010-04-30 2015-01-28 中兴通讯股份有限公司 一种信道信息的获取方法及装置
CN101877627B (zh) * 2010-06-21 2015-09-16 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
CN105247809B (zh) 2013-05-31 2019-06-21 高通股份有限公司 全维mimo系统中的线性预编码和动态垂直扇区化
KR102194927B1 (ko) 2013-06-05 2020-12-24 엘지전자 주식회사 무선 통신 시스템에서 채널상태정보 전송 방법 및 장치
CN104202276B (zh) 2014-07-16 2018-06-01 中兴通讯股份有限公司 信道信息的量化反馈、数据的预编码方法及装置
WO2016015225A1 (zh) * 2014-07-29 2016-02-04 华为技术有限公司 一种信道状态信息的反馈和接收方法、设备
JP6649268B2 (ja) * 2014-11-06 2020-02-19 シャープ株式会社 基地局装置、端末装置および通信方法
US10084579B2 (en) 2014-11-17 2018-09-25 Samsung Electronics Co., Ltd. CSI feedback for MIMO wireless communication systems with polarized active antenna array
US9654195B2 (en) 2014-11-17 2017-05-16 Samsung Electronics Co., Ltd. Methods to calculate linear combination pre-coders for MIMO wireless communication systems
KR102517868B1 (ko) * 2015-08-13 2023-04-04 한국전자통신연구원 주기적으로 csi 피드백 정보를 전송하는 단말
KR20180034494A (ko) 2015-08-20 2018-04-04 삼성전자주식회사 무선 통신 시스템에서 채널 상태 정보 피드백 방법 및 장치
US10009088B2 (en) 2016-03-28 2018-06-26 Samsung Electronics Co., Ltd. Linear combination PMI codebook based CSI reporting in advanced wireless communication systems
US10659118B2 (en) * 2016-04-19 2020-05-19 Samsung Electronics Co., Ltd. Method and apparatus for explicit CSI reporting in advanced wireless communication systems
CN109417462A (zh) 2016-05-13 2019-03-01 瑞典爱立信有限公司 用于降低密度csi-rs的机制
KR102414697B1 (ko) 2016-07-29 2022-06-29 삼성전자 주식회사 다수의 배열 안테나를 사용하는 이동통신 시스템에서 csi-rs 포트 공유를 위한 기준신호 설정 방법 및 장치
US10979191B2 (en) 2016-08-05 2021-04-13 Samsung Electronics Co., Ltd. Method and apparatus for reference signal signaling for advanced wireless communications
US11032041B2 (en) * 2016-10-28 2021-06-08 Ntt Docomo, Inc. User terminal and radio communication method
US11082176B2 (en) 2016-11-04 2021-08-03 Futurewei Technologies, Inc. System and method for transmitting a sub-space selection
US10673652B2 (en) 2017-03-02 2020-06-02 Futurewei Technologies, Inc. System and method for providing explicit feedback in the uplink
US10250313B2 (en) * 2017-03-09 2019-04-02 Samsung Electronics Co., Ltd. Method and apparatus for covariance matrix feedback in advanced wireless communication systems
US10742290B2 (en) * 2017-04-13 2020-08-11 Samsung Electronics Co., Ltd. High-resolution CSI reporting based on unequal bit allocation in advanced wireless communication systems
US11888771B2 (en) 2017-05-05 2024-01-30 Qualcomm Incorporated Beam procedure information for channel state information reference signals (CSI-RS)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118218A (zh) * 2010-01-06 2011-07-06 华为技术有限公司 信道状态信息的反馈方法和用户设备
CN102801498A (zh) * 2012-07-25 2012-11-28 电信科学技术研究院 一种终端设备选择子带反馈的上报及确定方法和设备
WO2017082634A1 (en) * 2015-11-11 2017-05-18 Samsung Electronics Co., Ltd. Method and apparatus for reduced feedback mimo
CN108111200A (zh) * 2017-06-16 2018-06-01 中兴通讯股份有限公司 一种信道状态信息反馈的方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE: "Type II CSI feedback based on linear combination", 3GPP TSG-RAN WG1 MEETING #88BIS, no. R1-1707127, 7 May 2017 (2017-05-07), Hangzhou, China, XP051262915 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111628844A (zh) * 2019-02-27 2020-09-04 电信科学技术研究院有限公司 一种信道状态信息反馈方法及装置

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