WO2017076220A1 - Procédé de renvoi d'informations d'état de canal (csi), terminal et station de base - Google Patents

Procédé de renvoi d'informations d'état de canal (csi), terminal et station de base Download PDF

Info

Publication number
WO2017076220A1
WO2017076220A1 PCT/CN2016/103626 CN2016103626W WO2017076220A1 WO 2017076220 A1 WO2017076220 A1 WO 2017076220A1 CN 2016103626 W CN2016103626 W CN 2016103626W WO 2017076220 A1 WO2017076220 A1 WO 2017076220A1
Authority
WO
WIPO (PCT)
Prior art keywords
precoding matrix
data transmission
transmission layer
terminal
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/103626
Other languages
English (en)
Chinese (zh)
Inventor
陈文洪
高秋彬
陈润华
李辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Academy of Telecommunications Technology CATT
Original Assignee
China Academy of Telecommunications Technology CATT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Academy of Telecommunications Technology CATT filed Critical China Academy of Telecommunications Technology CATT
Publication of WO2017076220A1 publication Critical patent/WO2017076220A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0675—Space-time coding characterised by the signaling
    • H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel state information CSI feedback method, a terminal, and a base station.
  • the 3rd Generation Partnership Project (3GPP) is committed to the evolution of 3G systems as the Long Term Evolution (LTE) system, with the goal of developing 3GPP wireless access.
  • LTE Long Term Evolution
  • Technology is evolving toward high data rates, low latency, and optimized packet data applications.
  • MIMO multiple-input multiple-output
  • the multi-antenna technology has many advantages, such as the use of multiple antennas for space division multiplexing to increase the system. Capacity, multi-antenna multiplexing gain to increase system throughput and more.
  • the increase in capacity causes the interference to increase accordingly.
  • the base station can obtain certain channel state information (CSI) in some way (can be instantaneous value, it can also be short-term. Or medium- and long-term statistical information, it is possible to optimize the power, rate and even the direction of loading of each data stream by a certain pre-processing method, and it is possible to pre-empt some or all of the interference between the data streams in the terminal by pre-processing. For better performance.
  • CSI channel state information
  • the embodiment of the present invention provides a CSI feedback method, a terminal, and a base station, which are used to improve the matching degree between the CSI and the channel state fed back by the terminal.
  • the terminal determines an arrangement manner of the data transmission layer
  • the terminal obtains CSI according to the arrangement manner of the data transmission layer
  • the terminal feeds back the CSI to a base station.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the terminal determines an arrangement manner of the data transmission layer, including:
  • the terminal determines the precoding matrix and the arrangement of the data transmission layers corresponding to the precoding matrix from the precoding matrix set.
  • the terminal obtains N candidate precoding matrices according to the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set and the precoding matrix in the precoding matrix set, and each precoding matrix corresponds to one Arrangement of one or more candidate data transmission layers, each candidate precoding matrix being arranged by using one precoding matrix in the precoding matrix set as a reference matrix and according to a candidate data transmission layer corresponding to the reference matrix Determined, N is an integer greater than or equal to 1;
  • the terminal selects one candidate precoding matrix from the N candidate precoding matrices according to the downlink channel estimation result;
  • the terminal obtains an arrangement manner of the reference matrix and the data transmission layer corresponding to the candidate precoding matrix according to the selected candidate precoding matrix, and uses the obtained reference matrix as the determined precoding matrix.
  • the terminal selects a precoding matrix from the precoding matrix set as the determined precoding matrix according to the downlink channel estimation result;
  • the terminal selects an arrangement manner of the data transmission layer from the arrangement manner of the candidate data transmission layers corresponding to the selected precoding matrix.
  • Each of the precoding matrices in the precoding matrix set selects an arrangement manner of the data transmission layer from the arrangement manner of the candidate data transmission layers as an arrangement manner of the data transmission layer corresponding to the precoding matrix;
  • the terminal selects a precoding matrix as the determined precoding matrix according to the result of the downlink channel estimation and the arrangement manner of the data transmission layer corresponding to each precoding matrix selected.
  • the terminal obtains CSI according to the arrangement manner of the data transmission layer, and includes:
  • the terminal obtains CSI according to determining a precoding matrix from the precoding matrix set and an arrangement manner of the data transmission layer corresponding to the precoding matrix.
  • the CSI feedback method provided by the present invention further includes: the terminal receiving configuration information sent by the base station, where the configuration information includes indication information of a candidate data transmission layer arrangement manner.
  • the terminal determines an arrangement manner of the data transmission layer, including:
  • the candidate data transmission layer has only one type of arrangement, and the terminal arranges the arrangement of the data transmission layers as the determined arrangement of the data transmission layer.
  • the method further includes: the terminal feeding back the arrangement information of the data transmission layer to the base station.
  • the CSI includes at least information about an arrangement manner of the data transmission layer corresponding to the determined precoding matrix.
  • the CSI includes one or more of a precoding matrix index PMI, a rank indication RI, and a channel quality indicator CQI.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the base station determines, according to the CSI, a precoding matrix used for precoding the data of the terminal, including:
  • the channel state information CSI feedback method provided by the embodiment of the present invention further includes:
  • the base station sends configuration information to the terminal, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers.
  • a first determining module configured to determine an arrangement manner of the data transmission layer
  • a second determining module configured to obtain CSI according to the arrangement manner of the data transmission layer
  • a feedback module configured to feed back the CSI to the base station.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the first determining module is specifically configured to:
  • the precoding matrix and the arrangement of the data transmission layers corresponding to the precoding matrix are determined from the precoding matrix set.
  • the first determining module is specifically configured to:
  • N candidate precoding matrices according to the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set and the precoding matrix in the precoding matrix set, each precoding matrix corresponding to one or more
  • the arrangement of the candidate data transmission layers, each candidate precoding matrix is determined by using one precoding matrix in the precoding matrix set as the reference matrix and according to the arrangement manner of a candidate data transmission layer corresponding to the reference matrix.
  • N is an integer greater than or equal to 1;
  • the first determining module is specifically configured to:
  • An arrangement of the data transmission layers is selected from the arrangement of the candidate data transmission layers corresponding to the selected precoding matrix.
  • the first determining module is specifically configured to:
  • the second determining module is specifically configured to:
  • the CSI is obtained according to determining the precoding matrix from the precoding matrix set and the arrangement of the data transmission layers corresponding to the precoding matrix.
  • the terminal provided by one embodiment of the present invention further includes:
  • the receiving module is configured to receive configuration information sent by the base station, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers.
  • the CSI includes one or more of the PMI, RI, and CQI.
  • a receiving module configured to receive CSI fed back by the terminal, where the CSI is obtained by the terminal according to the determined arrangement of the data transmission layer
  • a determining module configured to determine, according to the CSI, a precoding matrix used for precoding the data of the terminal.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the determining module is specifically configured to:
  • the base station provided by one embodiment of the present invention further includes:
  • the sending module is configured to send configuration information to the terminal, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers.
  • the terminal first determines the arrangement manner of the data transmission layer, and then obtains CSI according to the arrangement manner of the data transmission layer, and feeds back the CSI to the base station.
  • the data transmission effect can be different due to the arrangement of the different data transmission layers.
  • the terminal further determines and feeds back the CSI by first determining the arrangement manner of the data transmission layer, so that the terminal can determine The CSI fed back can reflect the actual channel state, and the CSI fed back by the instant terminal matches the channel state of the terminal.
  • FIG. 1 is a schematic structural diagram of a MIMO system with a single user as an example in the prior art
  • FIG. 2 is a schematic diagram of a transmission structure of a codebook-based precoding technology in the prior art
  • FIG. 3 is a schematic flowchart of a channel state information CSI feedback method according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a channel state information CSI feedback method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • GSM Global Mobile Communications
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • the user equipment includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular"
  • the telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.
  • a base station may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station
  • LTE Long Term Evolutional Node B
  • FIG. 1 is a structural block diagram of a MIMO system with a single user as an example.
  • the transmitting end such as a base station
  • a receiving end such as a terminal
  • the input serial code stream is converted into several parallel independent sub-code streams through a series of pre-processing (modulation, coding, weighting, mapping) and transmitted through different transmitting antennas.
  • the antenna group not less than the number of transmitting antennas is used for receiving, and the multi-channel received signal is processed in the spatial domain and the time domain by using a certain coding relationship between the estimated channel transmission characteristics and the transmitted sub-code stream, thereby Several sub-transmission sub-streams are separated and converted into serial data output.
  • MIMO regards the channel as a number of parallel self-channels, enabling near-distance spectrum resource reuse without multiple bandwidths (multiple transmit antennas close to the same frequency and simultaneous transmission), which can theoretically greatly expand the frequency band utilization. Rate and increase the wireless transmission rate.
  • the increase in capacity causes the interference to increase accordingly.
  • the system capacity of the MIMO is maximized, which is introduced in the prior art.
  • Precoding technology During the physical layer processing of LTE, several main transmission modes of the physical downlink shared channel are implemented by precoding.
  • the closed-loop precoding technique is introduced in the LTE Rel-8 system to improve the spectrum efficiency. Closed-loop precoding first requires that both the base station and the terminal maintain a set of the same precoding matrix, called a codebook.
  • a plurality of precoding matrices are usually used to form a codebook (ie, a precoding matrix). set).
  • the terminal measures the downlink channel according to the cell common reference (Cell Reference Signal, CRS), and after estimating the channel information, the UE can select the precoding matrix in the codebook based on the preset codebook, according to the prior art, for all
  • CRS Cell Reference Signal
  • the precoding matrix separately determines the signal energy, compares the signal energy of the precoding matrix according to some optimization criterion, selects a precoding matrix that best matches the current channel condition from the codebook, and uses the corresponding precoding matrix through the feedback link.
  • the index is fed back to the base station through the uplink channel.
  • This index is recorded as a Precoding Matrix Indicator (PMI).
  • the base station can determine the precoding matrix to be used for the terminal from the received index value.
  • the precoding matrix reported by the terminal can be regarded as a quantized value of Channel State Information (CSI).
  • CSI Channel State Information
  • the terminal When reporting the PMI, the terminal also reports a corresponding Rank Indicator (RI) and a Channel Quality Indicator (CQI), so that the base station determines the number of codewords, the number of layers, and the use of each codeword in the downlink transmission. Modulation coding method.
  • Figure 2 illustrates a wireless network architecture that currently employs a codebook based precoding technique.
  • the structure includes a base station 201 and a terminal 202, and a wireless link 203. Both the terminal 202 and the base station 201 have multiple antennas.
  • the terminal 202 and the base station 201 are configured with the same precoding matrix set (codebook). After measuring the downlink channel and determining the precoding matrix, the terminal 202 feeds back the precoding matrix index PMI corresponding to the precoding matrix to the base station 201 through the radio link 203.
  • the fed back CSI may include: a CQI indicating a radio communication channel quality between the base station and the terminal, a PMI indicating a preferred precoding matrix for shaping the transmission signal, and a number of useful transport layers indicating a preferred data channel of the terminal. RI, and one or more of the estimates of channel coefficients.
  • the fed back CSI enables the base station 201 to adaptively configure a suitable transmission scheme to improve coverage, or user data transmission rate, or more accurate prediction channel quality for future transmissions to the terminal 202.
  • the embodiment of the present invention provides a channel state information CSI feedback method, a terminal, and a base station.
  • Step 301 The terminal determines an arrangement manner of the data transmission layer.
  • the data transmission layer is arranged in a column vector arrangement manner of the precoding matrix used by the data transmission layer, or a mapping manner of the codewords to the data transmission layer, or an arrangement order of the data transmission layers.
  • the "arrangement of the data transmission layer” can also be understood as “the arrangement of the column vectors of the precoding matrix” or “the mapping manner of the code words to the data transmission layer”, or " The order of arrangement of each data transmission layer”.
  • each column vector is used for precoding of one data transmission layer, the arrangement or arrangement order of the data transmission layers and the arrangement of column vectors of the precoding matrix The way is equivalent.
  • step 301 can be implemented by using, but not limited to, the following solutions:
  • Method 1 The terminal obtains N candidate precoding matrices according to the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set and the precoding matrix in the precoding matrix set, and each precoding matrix corresponds to each precoding matrix. Arrangement of one or more candidate data transmission layers, each candidate precoding matrix being an arrangement of a candidate data transmission layer by using one precoding matrix in the precoding matrix set as a reference matrix and corresponding to the reference matrix The method is determined by the method, where N is an integer greater than or equal to 1; the terminal selects one candidate precoding matrix from the N candidate precoding matrices according to the downlink channel estimation result; and the terminal obtains the candidate precoding according to the selected candidate precoding matrix.
  • the reference matrix corresponding to the coding matrix and the data transmission layer are arranged, and the obtained reference matrix is used as the determined precoding matrix.
  • the candidate data transmission layers corresponding to different precoding matrices are arranged in the same or different manners in the precoding matrix set.
  • Method 2 The terminal selects a precoding matrix from the precoding matrix set as the determined precoding matrix according to the downlink channel estimation result; the terminal selects from the selected candidate data transmission layer arrangement manner corresponding to the precoding matrix A way of arranging data transmission layers.
  • Method 3 The terminal selects, for each precoding matrix in the precoding matrix set, an arrangement manner of the data transmission layer from the arrangement manner of the candidate data transmission layers as an arrangement manner of the data transmission layer corresponding to the precoding matrix; The terminal selects a precoding matrix as the determined precoding matrix according to the result of the downlink channel estimation and the arrangement manner of the data transmission layer corresponding to each of the selected precoding matrices.
  • the terminal selects an arrangement manner of the data transmission layer from the arrangement manner of the candidate data transmission layers corresponding to the selected precoding matrix, and the terminal in the scheme 3 is each precoding matrix set.
  • the coding matrix selects a data transmission layer arrangement manner from the arrangement manner of the candidate data transmission layers, and is a process in which the terminal selects a data transmission layer arrangement manner from the arrangement manner of the candidate data transmission layers corresponding to one precoding matrix. The process can be implemented but is not limited to the following implementations:
  • the terminal traverses the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix, calculates the downlink capacity corresponding to the arrangement manner of each candidate data transmission layer corresponding to the precoding matrix, and selects the downlink capacity from the downlink capacity.
  • the arrangement of the largest data transmission layers is used as the arrangement of the data transmission layers corresponding to the precoding matrix.
  • the downlink capacity may be represented by the downlink transport block size, that is, the arrangement of the data transport layer corresponding to the largest downlink transport block is selected as the data transmission layer corresponding to the precoding matrix.
  • the mode of the data transmission layer determined by the terminal in the mode 1 according to the principle of maximizing the downlink capacity can improve the downlink transmission efficiency.
  • Manner 2 The terminal separately calculates a downlink signal and an interference plus noise ratio SINR of each data transmission layer corresponding to the precoding matrix (which may also be understood as each column vector in the precoding matrix), and sequentially calculates the calculated downlink SINR. Arranging, according to the data transmission layer corresponding to the sorted downlink SINR, obtaining an arrangement manner of the data transmission layer corresponding to the precoding matrix.
  • the terminal separately calculates an SINR corresponding to each data transmission layer corresponding to the precoding matrix (which can also understand each column vector in the precoding matrix), and the SINR corresponding to each data transmission layer.
  • the SINRs corresponding to the data transmission layers may be arranged from large to small, or the SINRs corresponding to the data transmission layers may be arranged in order from the smallest to the largest, and the downlink SINR corresponding to each data transmission layer is used as the pre-arrangement.
  • the arrangement of the data transmission layers corresponding to the coding matrix may be arranged from large to small, or the SINRs corresponding to the data transmission layers may be arranged in order from the smallest to the largest, and the downlink SINR corresponding to each data transmission layer is used as the pre-arrangement.
  • the LTE system supports the transmission of the downlink two codewords at most, and each codeword can have its own modulation and coding mode, and adopts a hybrid hybrid automatic repeat request (Hybrid Automatic Repeat). reQuest, HARQ) process.
  • a codeword can only use one modulation coding method, but can be mapped to multiple layers, and different layers can use different precoding matrices. If the number of layers transmitted downstream is greater than two, one codeword can be mapped to multiple data streams (one data stream is one layer).
  • the terminal When performing CQI estimation, the terminal generally processes the SINR of all data streams mapped to the same codeword, and obtains the equivalent SINR of the codeword, thereby calculating the CQI.
  • a common processing method such as averaging the SINRs of all corresponding data streams, is to obtain an equivalent SINR of the codeword. If multiple data streams mapped to the same codeword have different SINR differences due to different precoding gains, they may use the same modulation and coding scheme to cause some data streams to be modulated too high or too low, and the data stream is detected. The SINRs do not match, causing the transmission throughput of these data streams to decrease, affecting the total data transmission rate.
  • the arrangement manner of the data transmission layer determined by the terminal in the manner of the downlink SINR in the mode 2 can make the detection SINR of the multiple data streams mapped to the same codeword relatively close, thereby reducing the base station to perform modulation according to the CQI fed back by the terminal. After the encoding, some modulation or coding modes of the data stream are too high or too low, and the spectrum efficiency of the transmission can be improved.
  • step 301 described in the method 1 and the method 3 is different from the predetermined precoding matrix described in the method 2, and the data transmission layer arrangement corresponding to the precoding matrix is determined according to the precoding matrix.
  • the flow of the way is different from the predetermined precoding matrix described in the method 2, and the data transmission layer arrangement corresponding to the precoding matrix is determined according to the precoding matrix. The flow of the way.
  • the flow of the candidate data transmission layer corresponding to the precoding matrix in the precoding set needs to traverse the arrangement of the candidate data transmission layers corresponding to the precoding matrix in the precoding set, thereby implementing determining the precoding matrix and the data corresponding to the precoding matrix.
  • the arrangement of the transport layers needs to traverse the arrangement of the candidate data transmission layers corresponding to the precoding matrix in the precoding set, thereby implementing determining the precoding matrix and the data corresponding to the precoding matrix.
  • the difference between the method 1 and the method 3 is that, when the step 301 is implemented, the candidate precoding matrix set corresponding to each candidate data transmission layer of each precoding matrix is obtained from the precoding matrix in the precoding matrix set. A candidate precoding matrix is selected in the set, or a data transmission layer arrangement is selected for each precoding matrix in the precoding matrix set.
  • the arrangement of the data transmission layer can also be understood as the arrangement of the column vectors of the precoding matrix used by the data transmission layer, so that the arrangement of the data transmission layer is understood as the column vector of the precoding matrix used by the data transmission layer.
  • the arrangement is as an example:
  • each precoding matrix corresponds to K candidate data transport layer arrangement manners, that is, K candidate precoding matrices.
  • a candidate precoding matrix (assumed to be n) is selected in the matrix, assuming that the candidate precoding matrix (n) is a precoding matrix (m) in the precoding matrix ⁇ 1.27-8m,...,M ⁇
  • the terminal is arranged according to the arrangement (k) of the data transmission layer corresponding to the corresponding candidate precoding matrix, and the terminal obtains the candidate precoding matrix (n) according to the selected candidate precoding matrix (n).
  • the reference matrix is an arrangement of the precoding matrix (m) and the data transmission layer as an arrangement of the candidate data transmission layer (k);
  • the arrangement of the K candidate data transmission layers ⁇ 1.21-0k for each of the M precoding matrices ⁇ 1.21-0m, ..., M ⁇ is first performed. ..., K ⁇ respectively select a candidate data transmission layer arrangement as the arrangement of the data transmission layer corresponding to each precoding matrix, taking the precoding matrix (m) as an example, from K candidate data transmission layers
  • the arrangement of the candidate data transmission layers (assumed to be k) is selected as the arrangement of the data transmission layers corresponding to the precoding matrix, and may be arranged in the arrangement ⁇ 1.2 acrossk,...,K ⁇ .
  • Precoding matrix (m) obtained by rearranging the original precoding matrix (m) according to the arrangement of the data transmission layer (k) to the column vector of the original precoding matrix (m), for M precoding matrices ⁇ 1.2 .m,...,M ⁇ can get M rearranged precoding matrices ⁇ 1'.2' Vietnamesem',...,M' ⁇ , the terminal estimates according to the downlink channel
  • a precoding matrix (assumed to be m') is determined from the M precoding matrices ⁇ 1'.2' Vietnamese,...,M' ⁇ , thereby according to the precoding matrix (m') determining a precoding matrix (m) and corresponding to the precoding matrix (m)
  • the processes described in the methods 1 and 3 are implemented in the actual implementation. Determining the precoding matrix in the set of coding matrices and determining the arrangement of the data transport layers from the arrangement of the candidate data transport layers may also be performed simultaneously.
  • a preferred candidate data transmission layer is arranged in a manner that only reflects different data transmission layers in a plurality of codewords
  • the allocation information which is mapped to different ordering of different data transmission layers of the same codeword, or the data transmission layer of two codeword mappings, is an equivalent arrangement.
  • the foregoing description of the arrangement of the candidate data transmission layers is not only used for the arrangement of the candidate data transmission layers corresponding to the precoding matrix, but also for the arrangement of all other candidate data transmission layers (including candidates for the base station configuration).
  • the arrangement of the data transfer layer is not only used for the arrangement of the candidate data transmission layers corresponding to the precoding matrix, but also for the arrangement of all other candidate data transmission layers (including candidates for the base station configuration).
  • the arrangement of the data transfer layer is not only used for the arrangement of the candidate data transmission layers corresponding to the precoding matrix, but also for the arrangement of all other candidate data transmission layers (including candidates for the base station configuration).
  • the arrangement of the data transfer layer is not only used for the arrangement of the candidate data transmission layers corresponding to the precoding matrix, but also for the arrangement of all other candidate data transmission layers (including candidates for the base station configuration).
  • the arrangement of the data transfer layer is not only used for the arrangement of the candidate data transmission layers corresponding to the precoding matrix, but also for the arrangement of all other candidate data transmission layers (including candidates
  • the matrix has M N ⁇ 1 dimensional column vectors, where the precoding matrix corresponds to
  • the arrangement of the candidate data transmission layers is the arrangement of the M column vectors.
  • the three column vectors may be arranged in the following order (the following numbers are the indices of the column vectors): ⁇ 1, 2, 3 ⁇ , ⁇ 1, 3, 2 ⁇ , ⁇ 2, 1, 3 ⁇ , ⁇ 2, 3, 1 ⁇ , ⁇ 3, 2, 1 ⁇ , ⁇ 3, 1, 2 ⁇ , then the candidate column vector can be arranged ⁇ 1, 2, 3 ⁇ , ⁇ 1, 3, 2 ⁇ One or more of ⁇ 2,1,3 ⁇ , ⁇ 2,3,1 ⁇ , ⁇ 3,2,1 ⁇ , ⁇ 3,1,2 ⁇ . Since the arrangement of the column vectors only reflects the allocation information of the different column vectors in multiple codewords, the different arrangement order of the column vectors for the same codeword, or the column vectors of the two codewords are exchanged, etc.
  • the M column vectors have the largest downlink capacity when arranged according to ⁇ 1, 2, 3 ⁇ , and the SINRs corresponding to the M column vectors are arranged in order from largest to smallest, and the corresponding column vectors are arranged as ⁇ 3,1,2 ⁇
  • the following line capacity is the maximum criterion to select the arrangement of the data transmission layer corresponding to the precoding matrix
  • ⁇ 1, 2, 3 ⁇ is the data transmission layer corresponding to the precoding matrix
  • ⁇ 3, 1, 2 ⁇ is determined as The arrangement of the data transmission layers corresponding to the precoding matrix.
  • the terminal may carry information about the arrangement manner of the data transmission layer corresponding to the precoding matrix by using several bits to feed back the determined (ie, recommended) precoding of the terminal to the base station.
  • the arrangement of the data transmission layers corresponding to the matrix may be carried by using several bits to feed back the determined (ie, recommended) precoding of the terminal to the base station.
  • the terminal determines the arrangement manner of the data transmission layer corresponding to the determined precoding matrix as the pre
  • the arrangement of the data transmission layer corresponding to the coding matrix for example, the configuration message sent by the base station is received by the terminal, and the configuration information includes an arrangement of a unique candidate data transmission layer corresponding to the precoding matrix in the precoding matrix set.
  • Step 302 The terminal obtains CSI according to the arrangement manner of the data transmission layer.
  • Step 303 The terminal feeds back the CSI to the base station.
  • the terminal may determine, according to the precoding matrix from the precoding matrix set, the precoding matrix and the precoding matrix pair.
  • the CSI is obtained by the arrangement of the data transmission layers.
  • CSI is the channel attribute of the communication link, the degenerative factor of the signal on each transmission path, that is, the value of each element in the channel gain matrix H, such as signal scattering, environmental degradation, is described ( Fading, multipath fading or shadowing fading), information such as power decay of distance.
  • CSI can adapt the communication system to current channel conditions, providing high reliability and high rate communication in multi-antenna systems.
  • CSI can be obtained by using a precoding matrix determined from a precoding matrix set and an arrangement of data transmission layers corresponding to the precoding matrix.
  • the CSI may include one or more of a PMI, an RI, and a CQI of the determined precoding matrix.
  • the terminal may feed back information of the arrangement manner of the data transmission layer to the base station.
  • the CSI includes at least information about an arrangement manner of the data transmission layer corresponding to the determined precoding matrix
  • the terminal may use the arrangement manner of the data transmission layer as the determined arrangement manner of the data transmission layer and the precoding matrix is pre-
  • the CSI may or may not include information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix.
  • the terminal may obtain part or all of the information in the CSI according to the arrangement manner of the data transmission layer corresponding to the determining precoding matrix, that is, the terminal may determine the data transmission layer corresponding to the precoding matrix according to the determining, in determining the CSI of the feedback.
  • the arrangement of the column vectors in the determined precoding matrix is rearranged to obtain one or more feedback quantities of the reported RI, PMI, and CQI. Specifically, taking CQI as an example, since CQI is an information indication of channel quality, representing the quality of the current channel, corresponding to the signal to noise ratio of the channel, when the terminal performs CQI estimation, it is generally mapped to the same codeword.
  • the equivalent SINR of the codeword is obtained, thereby calculating the CQI. Therefore, according to the determined precoding matrix and the arrangement manner of the data transmission layer corresponding to the precoding matrix, one or more feedback quantities of RI, PMI, and CQI included in the CSI in the CSI process are obtained. And determining according to the determined precoding matrix and the arrangement manner of the data transmission layer corresponding to the precoding matrix.
  • an implementation manner of the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix may be: the candidate of the data transmission layer corresponding to the determined precoding matrix is a candidate corresponding to the precoding matrix An index in a set formed by an arrangement of data transmission layers, wherein each candidate data transmission layer corresponding to the precoding matrix The arrangement is corresponding to an index in the collection.
  • the terminal feeds back to the base station, the index PMI of the precoding matrix that is recommended to be determined in the precoding matrix set, and the data transmission layer corresponding to the precoding matrix are arranged in all candidate data transmission layers.
  • the precoding matrix set is an identical set pre-configured on the base station and the terminal, and the set of candidate data transport layer arrangements is also a same set pre-configured on the base station and the terminal.
  • the terminal may use a plurality of bits to carry information of the index PMI in the precoding matrix set of the determined precoding matrix, and use other numbers to carry the arrangement manner of the data transmission layer corresponding to the determined precoding matrix in the candidate data.
  • the information of the index in the set of arrangement manners of the transport layer is used to feed back, to the base station, the precoding matrix determined and recommended by the terminal and the arrangement manner of the data transport layer corresponding to the precoding matrix.
  • information about an arrangement manner of a data transmission layer corresponding to the determined precoding matrix may be separately encoded to obtain the CSI; or, PMI And one or more of RI and CQI, and information about an arrangement manner of the data transmission layer corresponding to the determined precoding matrix may be jointly encoded to obtain the CSI.
  • one or more of PMI, RI, CQI, and information about an arrangement manner of a data transmission layer corresponding to the determined precoding matrix are jointly encoded, which may be a PMI.
  • One or more of the RI and the CQI, for example, the PMI and the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix are jointly coded, and the data transmission layer corresponding to the determined precoding matrix is arranged.
  • the information is that the arrangement of the data transmission layer corresponding to the determined precoding matrix is indexed in the arrangement manner of all the candidate data transmission layers, and each candidate corresponding to the precoding matrix corresponding to the PMI may be firstly selected.
  • the arrangement of the data transmission layers is combined to obtain a list of the combination of the PMI and the data transmission layer.
  • the list can be pre-configured on the base station and the terminal, so that when the feedback to the base station is performed, only a few bits are required to carry the determined.
  • the combination of the PMI of the precoding matrix and the arrangement of the data transmission layer in the list of the combination of the arrangement of the PMI and the data transmission layer The information introduced can reduce the system resource overhead required by the terminal to feed back to the base station through joint coding.
  • the terminal may also feed back to the base station whether it is necessary to determine the arrangement of the data transmission layer when the base station performs downlink data transmission. If the feedback is required to be used, the base station determines the arrangement of the data transmission layer corresponding to the precoding matrix determined by the CSI fed back by the terminal, and then performs the downlink data pre-determination after determining the precoding matrix according to the CSI fed back by the terminal. Encoding; if the feedback is not needed, the base station may perform downlink data precoding according to the prior art, after determining a precoding matrix according to the CSI fed back by the terminal.
  • the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set is pre-configured on the terminal.
  • the foregoing information pre-configured on the terminal may be agreed by the system, or may be configured by the base station to the terminal.
  • the manner in which the base station configures the arrangement of the candidate data transmission layers to the terminal may be implemented by using, but not limited to, the following solutions:
  • the base station sends configuration information to the terminal, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers.
  • the terminal receives the foregoing configuration information sent by the base station, so that the arrangement manner information of the candidate data transmission layer can be obtained.
  • the configuration information includes indication information of an arrangement manner of candidate data transmission layers corresponding to all or part of the precoding matrix in the precoding matrix set.
  • the arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set included in the configuration information may be determined by the base station according to the uplink channel estimation result of the terminal, or may be determined by the base station according to the pre-configured pre
  • the arrangement of the candidate data transmission layers corresponding to the coding matrix is determined.
  • the configuration information may be sent by the base station to the terminal by using the high layer signaling or the physical layer signaling (Downlink Control Information (DCI)) carried by the Physical Downlink Control Channel (PDCCH).
  • DCI Downlink Control Information
  • Another embodiment of the present invention proposes a channel state information CSI feedback method.
  • FIG. 4 is a schematic flowchart diagram of a channel state information CSI feedback method according to another embodiment of the present invention.
  • the process may be implemented by a base station, and the process includes the following steps:
  • Step 401 The base station receives the CSI fed back by the terminal, where the CSI is obtained by the terminal according to the determined arrangement of the data transmission layer.
  • Step 402 The base station determines, according to the CSI, a precoding matrix used for precoding data of the terminal.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • step 402 may include:
  • the arrangement of the data transmission layer fed back by the terminal is an index in the arrangement manner of the candidate data transmission layer
  • the base station determines the precoding matrix corresponding to the PMI by using the PMI in the CSI fed back by the terminal, according to the terminal feedback.
  • the arrangement of the data transmission layers determines the index of the arrangement of the column vectors in the arrangement manner of the candidate data transmission layers, thereby determining the arrangement of the data transmission layers corresponding to the indexes from the arrangement of the candidate data transmission layers, and the base station according to the The arrangement of the data transmission layers corresponding to the index rearranges the column vectors of the precoding matrix corresponding to the PMI, and then determines a precoding matrix for precoding the data of the terminal.
  • the precoding matrix is a matrix having a dimension of 8 ⁇ 4, including 4 column vectors
  • the column vector arrangement information fed back by the terminal corresponds to the column vector arrangement manner ⁇ 1, 3, 2, 4 ⁇
  • the base station After exchanging the 2nd and 3rd column vectors in the original arrangement pattern ⁇ 1, 2, 3, 4 ⁇ of the precoding matrix, it is determined that the precoding matrix with the arrangement of ⁇ 1, 3, 2, 4 ⁇ is used. And a precoding matrix for precoding the data of the terminal.
  • the base station may further send configuration information to the terminal, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set.
  • the configuration information includes indication information of an arrangement manner of candidate data transmission layers corresponding to all or part of the precoding matrix in the precoding matrix.
  • the base station may determine, according to the uplink channel estimation result of the terminal, an arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set.
  • the base station may determine, according to the uplink channel estimation result of the terminal, a candidate data transmission layer that is optimally matched with the channel state of the terminal for the precoding matrix in the precoding matrix set, and adopts configuration information. Transmitting the indication information of the arrangement manner of the candidate data transmission layer to the terminal.
  • the precoding matrix in the precoding matrix set can be matched according to the arrangement manner of the candidate data transmission layer to obtain a more matching terminal.
  • one implementation manner of the indication information about the arrangement manner of one candidate data transmission layer corresponding to one precoding matrix included in the configuration message may be: the arrangement manner of the candidate data transmission layer is corresponding to all the precoding matrices. An index in a set formed by the arrangement of the candidate data transport layers, wherein each candidate data transport layer corresponding to the precoding matrix may be arranged in an array corresponding to one index in the set.
  • the terminal feeds back, to the base station, the index PMI of the precoding matrix in the precoding matrix set and the arrangement of the data transmission layer corresponding to the precoding matrix in the candidate data transmission layer.
  • the precoding matrix set is a same set pre-configured on the base station and the terminal, and the set of candidate data transport layers may also be an identical set pre-configured on the base station and the terminal.
  • the base station may further receive feedback sent by the terminal for determining whether the data transmission layer is arranged when performing downlink data transmission. If the feedback is needed, the base station determines the precoding matrix according to the CSI, and according to the CSI. After the CSI determines the arrangement of the data transmission layer corresponding to the precoding matrix, the precoding of the downlink data is performed; if the feedback is not required, the base station may determine the precoding matrix according to the CSI. Precoding of downlink data is performed according to the prior art.
  • the terminal determines the arrangement manner of the data transmission layer, and then obtains CSI according to the arrangement manner of the data transmission layer, and the terminal feeds back to the base station.
  • the CSI For the data transmission process, the data transmission effect can be different due to the arrangement of different data transmission layers.
  • the terminal further determines and feeds back the CSI by first determining the arrangement of the data transmission layer, so that the CSI determined and fed back by the terminal is more capable. Reflecting the actual channel state, the CSI fed back by the instant terminal is more closely matched with the channel state of the terminal.
  • the prediction when determining the arrangement manner of the data transmission layer corresponding to the precoding matrix, the prediction may be determined based on the downlink capacity maximization criterion or the SINR ranking order corresponding to the precoding matrix column vector.
  • the arrangement of the data transmission layers corresponding to the coding matrix enables a larger downlink transmission capacity to be obtained, further improves data transmission efficiency, or makes the detection SINRs of multiple data streams mapped to the same codeword relatively close, and reduces base station modulation. After encoding, some modulation or coding modes of data streams are too high or too low, which improves the efficiency of data transmission.
  • the embodiment of the present invention further provides a terminal, where the terminal can perform the foregoing terminal side method embodiment.
  • the terminal provided by the embodiment of the present invention includes:
  • a first determining module 501 configured to determine an arrangement manner of the data transmission layer
  • a second determining module 502 configured to obtain CSI according to the arrangement manner of the data transmission layer
  • the feedback module 503 is configured to feed back the CSI to the base station.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the first determining module 501 is specifically configured to: determine, from the precoding matrix set, a precoding matrix and an arrangement manner of the data transmission layer corresponding to the precoding matrix.
  • the first determining module 501 is specifically configured to:
  • each precoding matrix corresponding to one or more
  • the arrangement of the candidate data transmission layers, each candidate precoding matrix is determined by using one precoding matrix in the precoding matrix set as the reference matrix and according to the arrangement manner of a candidate data transmission layer corresponding to the reference matrix.
  • N is an integer greater than or equal to 1; selecting one candidate precoding matrix from the N candidate precoding matrices according to a downlink channel estimation result; and obtaining a reference corresponding to the candidate precoding matrix according to the selected candidate precoding matrix
  • the arrangement of the matrix and the data transmission layer, and the obtained reference matrix is taken as the determined precoding matrix.
  • the first determining module 501 is further configured to: select, according to each of the precoding matrices in the precoding matrix set, an arrangement manner of the data transport layer from the arrangement manner of the candidate data transport layers, as the corresponding one of the precoding matrices The arrangement of the data transmission layers; selecting a precoding matrix as the determined precoding matrix according to the result of the downlink channel estimation and the arrangement of the data transmission layers corresponding to each of the selected precoding matrices.
  • the first determining module 501 may be specifically configured to: calculate a downlink capacity according to an arrangement manner of each candidate data transmission layer corresponding to the precoding matrix, and select an arrangement manner of a data transmission layer corresponding to a downlink capacity that has the largest value; or
  • the downlink SINR corresponding to each column vector in the precoding matrix is calculated separately, and the calculated downlink SINRs are sequentially arranged, and the data transmission corresponding to the precoding matrix is obtained according to each data transmission layer corresponding to the sorted downlink SINRs.
  • the arrangement of the layers may be specifically configured to: calculate a downlink capacity according to an arrangement manner of each candidate data transmission layer corresponding to the precoding matrix, and select an arrangement manner of a data transmission layer corresponding to a downlink capacity that has the largest value; or
  • the downlink SINR corresponding to each column vector in the precoding matrix is calculated separately, and the calculated downlink SINRs are sequentially arranged, and the data transmission corresponding to the precoding matrix is obtained according to each data transmission layer corresponding to the
  • the candidate data transmission layers corresponding to different precoding matrices are arranged in the same or different manner.
  • the terminal provided by one embodiment of the present invention may further include:
  • the receiving module 504 is configured to receive configuration information sent by the base station, where the configuration information includes indication information about an arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set.
  • the configuration information may include indication information of an arrangement manner of the candidate data transmission layers corresponding to all or part of the precoding matrix in the precoding matrix set.
  • the CSI includes one or more of a precoding matrix index PMI, a rank indication RI, and a channel quality indicator CQI of the determined precoding matrix.
  • the CSI may also include one or more of PMI, RI, and CQI of the determined precoding matrix, and information about an arrangement manner of the data transmission layer corresponding to the determined precoding matrix.
  • the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix is separately encoded to obtain the CSI; or, PMI, RI And one or more of the CQIs, the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix is jointly encoded to obtain the CSI.
  • the embodiment of the invention further provides a base station, which can perform the foregoing base station side method embodiment.
  • the base station provided by the embodiment of the present invention is as shown in FIG. 6, and the base station includes:
  • the receiving module 601 is configured to receive CSI fed back by the terminal, where the CSI is obtained by the terminal according to an arrangement manner of the data transmission layer;
  • the determining module 602 is configured to determine, according to the CSI, a precoding matrix used for precoding the data of the terminal.
  • the data transmission layer is arranged in a column vector arrangement manner of a precoding matrix used by the data transmission layer, or a mapping manner of a codeword to the data transmission layer, or an arrangement order of each data transmission layer.
  • the determining module 602 is specifically configured to: determine, according to the CSI, a precoding matrix for downlink precoding from a precoding matrix set;
  • the base station provided by one embodiment of the present invention further includes:
  • the sending module 603 is configured to send configuration information to the terminal, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers.
  • the configuration information may include candidate data corresponding to all or part of the precoding matrix in the precoding matrix. Indicates the arrangement of the transport layer.
  • an embodiment of the present invention further provides a terminal, which can implement the CSI feedback process implemented on the terminal side described in the foregoing embodiment.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal may include: a processor 701, a memory 702, a transceiver 703, and a bus interface.
  • the processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 can store data used by the processor 701 in performing operations.
  • the transceiver 703 is configured to receive and transmit data under the control of the processor 701.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 701 and various circuits of memory represented by memory 702.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 703 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 701 is responsible for managing the bus architecture and general processing, and the memory 702 can store data used by the processor 701 in performing operations.
  • the channel state information CSI feedback flow of the terminal side disclosed in the embodiment of the present invention may be applied to a terminal constituted by the processor 701, the memory 702, the transceiver 703, and the bus interface, or by the processor 701, the memory 702, the transceiver 703, and Terminal implementation of the bus interface.
  • the steps of the channel state information CSI feedback flow may be completed by the integrated logic circuit of the hardware in the base station formed by the processor 701, the memory 702, the transceiver 703, and the bus interface, or the instruction in the form of software.
  • the processor 701, the memory 702, the transceiver 703, and the bus interface may include a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, and discrete hardware components.
  • the methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or executed.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method on the terminal side disclosed in the embodiment of the present invention may be directly implemented as completion of the terminal, or may be performed by using a combination of hardware and software modules of the terminal.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 702.
  • the processor 701 reads the information in the memory 702, controls the transceiver 703 to receive and transmit data, and completes the steps of the channel state information CSI feedback process in conjunction with the hardware.
  • the terminal composed of the processor 701, the memory 702, the transceiver 703, and the bus interface can perform the following processes:
  • the processor 701 is configured to determine an arrangement manner of the data transmission layer, and is configured to obtain CSI according to the arrangement manner of the data transmission layer, and is further configured to control the transceiver 703 to feed back the CSI to the base station.
  • the processor 701 can read the program and data in the memory 702: the processor 701 reads the precoding matrix set from the memory 702, and determines the precoding matrix and the number corresponding to the precoding matrix from the precoding matrix set. According to the arrangement of the transport layer, the processor 701 may further obtain CSI according to the determined precoding matrix and the column vector arrangement manner of the precoding matrix; the processor 701 may further control the transceiver. 703 feeds back the CSI to the base station.
  • the processor 701 may be configured to: obtain N candidate precodings according to a precoding matrix in a precoding matrix set and a candidate data transmission layer corresponding to a precoding matrix in the precoding matrix set. a matrix, each precoding matrix corresponding to an arrangement of one or more candidate data transmission layers, each candidate precoding matrix being obtained by using one precoding matrix in the precoding matrix set as a reference matrix and corresponding to the reference matrix An arrangement of the candidate data transmission layers is determined, where N is an integer greater than or equal to 1; according to the downlink channel estimation result, one candidate precoding matrix is selected from the N candidate precoding matrices; according to the selected candidate The precoding matrix obtains an arrangement manner of the reference matrix and the data transmission layer corresponding to the candidate precoding matrix, and uses the obtained reference matrix as the determined precoding matrix.
  • the processor 701 is specifically configured to: select, according to a downlink channel estimation result, a precoding matrix from the precoding matrix set as the determined precoding matrix; candidate data corresponding to the selected precoding matrix.
  • a precoding matrix from the precoding matrix set as the determined precoding matrix
  • candidate data corresponding to the selected precoding matrix.
  • an arrangement of data transmission layers is selected.
  • the processor 701 may be configured to: select, according to an arrangement manner of each of the candidate data transmission layers, each of the precoding matrices in the precoding matrix set, as an arrangement manner of the precoding matrix. The arrangement of the data transmission layers; selecting a precoding matrix as the determined precoding matrix according to the result of the downlink channel estimation and the arrangement of the data transmission layers corresponding to each of the selected precoding matrices.
  • the processor 701 may select, for one precoding matrix, an arrangement of the data transmission layers from the arrangement of the candidate data transmission layers corresponding to the precoding matrix.
  • the candidate data transmission layers corresponding to different precoding matrices are arranged in the same or different manners in the precoding matrix set.
  • the processor 701 is further configured to receive, by the transceiver 703, the configuration information that is sent by the base station, where the configuration information includes indication information of an arrangement manner of the candidate data transmission layers corresponding to the precoding matrix in the precoding matrix set.
  • the CSI may include one or more of a PMI, an RI, and a CQI; or the CSI may also include one or more of a PMI, an RI, and a CQI, and the determined precoding matrix corresponding to the CSI. Information about the arrangement of the data transfer layers.
  • the one or more of the PMI, the RI, and the CQI may be separately encoded by the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix to obtain the CSI; or, PMI, RI And one or more of the CQIs, the information about the arrangement manner of the data transmission layer corresponding to the determined precoding matrix is jointly encoded to obtain the CSI.
  • the embodiment of the present invention further provides a base station, which can implement the channel state information CSI feedback process implemented on the base station side described in the foregoing embodiment.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station may include: a processor 801, a memory 802, a transceiver 803, and a bus interface.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 in performing operations.
  • the transceiver 803 is configured to receive and transmit data under the control of the processor 801.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 801 and various circuits of memory represented by memory 802.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 803 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 in performing operations.
  • the channel state information CSI feedback flow of the base station side disclosed in the embodiment of the present invention may be applied to a base station formed by the processor 801, the memory 802, the transceiver 803, and the bus interface, or by the processor 801, the memory 802, and the transceiver 803. And base station implementation of the bus interface.
  • the steps of the channel state information CSI feedback flow may be completed by the integrated logic circuit of the hardware in the base station formed by the processor 801, the memory 802, the transceiver 803, and the bus interface, or the instruction in the form of software.
  • the processor 801, the memory 802, the transceiver 803, and the bus interface may include a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, and discrete hardware components.
  • the methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or executed.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method on the base station side disclosed in the embodiment of the present invention may be directly implemented as completion of the base station, or may be performed by using a combination of hardware and software modules of the base station.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 802.
  • the processor 801 reads the information in the memory 802, controls the transceiver 803 to receive and transmit data, and completes the steps of the channel state information CSI feedback process in conjunction with the hardware.
  • the base station composed of the processor 801, the memory 802, the transceiver 803, and the bus interface can perform the process of the channel state information CSI feedback method embodiment described above on the base station side.
  • the terminal determines the arrangement manner of the data transmission layer, and then according to the number According to the arrangement of the transport layers, CSI is obtained, and the terminal feeds back the CSI to the base station. It can be seen that the embodiments of the present invention can improve the matching degree of CSI and channel state fed back by the terminal.
  • these techniques can be implemented with modules (eg, programs, functions, etc.) that implement the functions described herein.
  • the software code can be stored in a memory unit and executed by the processor.
  • the memory unit can be implemented within the processor or external to the processor.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de renvoi d'informations d'état de canal (CSI), un terminal et une station de base. Le procédé de la présente invention consiste à : déterminer, par le terminal, un agencement d'une couche de transmission de données et acquérir les CSI par le terminal en fonction de l'agencement de la couche de transmission de données, puis renvoyer les CSI par le terminal à la station de base. La présente invention peut améliorer le degré auquel les CSI renvoyées par le terminal correspondent à un état de canal.
PCT/CN2016/103626 2015-11-06 2016-10-27 Procédé de renvoi d'informations d'état de canal (csi), terminal et station de base Ceased WO2017076220A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510751364.8 2015-11-06
CN201510751364.8A CN106685598B (zh) 2015-11-06 2015-11-06 一种信道状态信息csi反馈方法、终端及基站

Publications (1)

Publication Number Publication Date
WO2017076220A1 true WO2017076220A1 (fr) 2017-05-11

Family

ID=58661650

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/103626 Ceased WO2017076220A1 (fr) 2015-11-06 2016-10-27 Procédé de renvoi d'informations d'état de canal (csi), terminal et station de base

Country Status (2)

Country Link
CN (1) CN106685598B (fr)
WO (1) WO2017076220A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106936486B (zh) * 2015-12-30 2020-07-21 电信科学技术研究院 一种csi反馈方法及装置
CN109391313B (zh) * 2017-08-11 2021-11-30 展讯通信（上海）有限公司 信道状态信息反馈方法及用户终端、基站及可读存储介质
CN109474406B (zh) * 2017-09-08 2020-04-10 电信科学技术研究院有限公司 一种csi信息的上报、接收方法及通信设备
WO2020118731A1 (fr) 2018-12-14 2020-06-18 Qualcomm Incorporated Compression de retour d'informations d'état du canal
WO2025200191A1 (fr) * 2024-03-27 2025-10-02 Huawei Technologies Co., Ltd. Procédé et appareil de communications

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101867447A (zh) * 2010-04-30 2010-10-20 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
CN102082639A (zh) * 2010-11-08 2011-06-01 大唐移动通信设备有限公司 信道状态信息的传输方法和设备
CN104579586A (zh) * 2013-10-22 2015-04-29 电信科学技术研究院 信道状态信息的反馈方法和装置、以及接收方法和装置
US20150304008A1 (en) * 2012-12-27 2015-10-22 Huawei Technologies Co., Ltd. Method for feeding backchannel state information, user equipment, and base station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101867447A (zh) * 2010-04-30 2010-10-20 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
CN102082639A (zh) * 2010-11-08 2011-06-01 大唐移动通信设备有限公司 信道状态信息的传输方法和设备
US20150304008A1 (en) * 2012-12-27 2015-10-22 Huawei Technologies Co., Ltd. Method for feeding backchannel state information, user equipment, and base station
CN104579586A (zh) * 2013-10-22 2015-04-29 电信科学技术研究院 信道状态信息的反馈方法和装置、以及接收方法和装置

Also Published As

Publication number Publication date
CN106685598A (zh) 2017-05-17
CN106685598B (zh) 2019-06-14

Similar Documents

Publication Publication Date Title
JP7158490B2 (ja) 複数の仮定を伴うチャネル状態情報（ｃｓｉ）フィードバック
US11419137B2 (en) Transmissions based on scheduling indications
US10505614B2 (en) CSI feedback method, precoding method, and apparatus
US8626081B2 (en) Method and arrangements for signaling control information in a communication system
CN102237955B (zh) 一种信道状态信息上报方法及其装置
CN111587542B (zh) 上报信道状态信息csi的方法和装置
US10742292B2 (en) CSI feedback method, precoding method, and apparatus
US11503549B2 (en) Power allocation method and related device
US20130121312A1 (en) Transmission of Channel State Information
CN106559232B (zh) 信息通知方法及信道状态信息csi进程的执行方法
CN107204794A (zh) 一种csi反馈方法、预编码方法及装置
CN108631847A (zh) 传输信道状态信息的方法、终端设备和网络设备
CN113711512A (zh) 上行链路控制信息
CN109412663B (zh) 用于mimo通信的方法、设备和计算机可读介质
CN107181509A (zh) 一种数据传输方法和装置
CN108886425B (zh) 一种混合信道状态信息反馈的方法、终端设备及基站
WO2017167156A1 (fr) Procédé et dispositif de transmission de dmrs
WO2017076220A1 (fr) Procédé de renvoi d'informations d'état de canal (csi), terminal et station de base
WO2018039860A1 (fr) Procédé et appareil de mesurage et de rétroaction de qualité de canal
CN108282255A (zh) 参数取值的确定、配置方法及装置、终端及基站
CN109391305A (zh) 一种通信处理方法及装置
WO2017114513A1 (fr) Procédé et dispositif de rétroaction d'informations d'état de canal (csi)
US20240214035A1 (en) Determination of uplink mimo transmission state for a ue
GB2496203A (en) Channel quality indicator reports in multicarrier systems
WO2025035433A1 (fr) Procédé de communication et dispositif de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16861488

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16861488

Country of ref document: EP

Kind code of ref document: A1