WO2022165668A1 - 一种进行预编码的方法和装置 - Google Patents

一种进行预编码的方法和装置 Download PDF

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Publication number
WO2022165668A1
WO2022165668A1 PCT/CN2021/075064 CN2021075064W WO2022165668A1 WO 2022165668 A1 WO2022165668 A1 WO 2022165668A1 CN 2021075064 W CN2021075064 W CN 2021075064W WO 2022165668 A1 WO2022165668 A1 WO 2022165668A1
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Prior art keywords
downlink reference
data stream
uplink
precoding vector
downlink
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PCT/CN2021/075064
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English (en)
French (fr)
Inventor
王潇涵
金黄平
杭海存
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/075064 priority Critical patent/WO2022165668A1/zh
Priority to CN202180090602.9A priority patent/CN116762283A/zh
Priority to EP21923696.5A priority patent/EP4277149A4/en
Publication of WO2022165668A1 publication Critical patent/WO2022165668A1/zh
Priority to US18/362,982 priority patent/US20230379020A1/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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • 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
    • 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
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • 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
    • H04B7/0658—Feedback reduction
    • H04B7/0663—Feedback reduction using vector or matrix manipulations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods

Definitions

  • the present application relates to the field of wireless communication, and more particularly, to a method and apparatus for precoding.
  • massive multiple-input multiple-output multiple-output massive multiple-input multiple-output multiple-output multiple-output
  • precoding can reduce the interference between multiple users and the interference between multiple signal streams of the same user, which is conducive to improving the Signal quality, realize space division multiplexing, and improve spectrum utilization.
  • the base station performs channel estimation on the uplink channel according to the channel sounding reference signal (Sounding Reference Signal, SRS) sent by the user equipment (UE), and calculates the uplink precoding matrix of the UE.
  • SRS Sounding Reference Signal
  • DCI downlink control information indicates the index in the codebook to the UE, so that the UE can perform uplink precoding according to the uplink precoding matrix.
  • the present application provides a method and apparatus for precoding, which can improve the indication precision of an uplink precoding matrix.
  • a method for precoding includes: receiving multiple precoded downlink reference signals; and measuring the multiple downlink reference signals to determine an uplink precoding vector corresponding to an uplink data stream.
  • the terminal device can measure multiple downlink reference signals, so that the terminal device can more accurately obtain the uplink precoding vector corresponding to the uplink data stream according to the measurement result, and improve the accuracy of the uplink precoding vector, thereby reducing the multi-user relationship.
  • the signal interference between them is beneficial to improve the signal quality.
  • measuring the multiple downlink reference signals to determine the uplink precoding vector corresponding to the uplink data stream specifically includes: each of the multiple downlink reference signals. Measure the downlink reference signals to determine the uplink precoding vector corresponding to each downlink reference signal; and determine the uplink precoding vector according to the uplink precoding vectors corresponding to the multiple downlink reference signals.
  • measuring each downlink reference signal in the plurality of downlink reference signals to determine an uplink precoding vector corresponding to each downlink reference signal specifically including: Each downlink reference signal is measured to obtain an equivalent downlink channel matrix corresponding to each downlink reference signal; an uplink precoding vector corresponding to each downlink reference signal is determined according to the equivalent downlink channel matrix corresponding to each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is the average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream.
  • the precoding vector is the sum of downlink precoding vectors corresponding to the multiple downlink reference signals.
  • the method further includes: precoding the upstream data stream based on the upstream precoding vector.
  • the precoding of the upstream data stream based on the upstream precoding vector specifically includes: processing the upstream precoding vector; The precoding vector precodes the upstream data stream.
  • the precoding of the upstream data stream based on the upstream precoding vector specifically includes using the upstream precoding vector to precode the upstream data stream.
  • each downlink reference signal in the multiple downlink reference signals is precoded by a downlink precoding vector, and the downlink precoding vector is obtained by Determined by measurement.
  • the terminal device can measure multiple downlink reference signals, so that the terminal device can more accurately obtain the uplink precoding vector corresponding to the uplink data stream according to the measurement result, and improve the accuracy of the uplink precoding vector, thereby reducing the multi-user relationship.
  • the signal interference between them is beneficial to improve the signal quality. For example, when the signal-to-noise ratio of the downlink reference signal received by the terminal device is low, the uplink precoding vector corresponding to the multiple downlink reference signals can be processed into the uplink precoding vector corresponding to one uplink data stream by processing the multiple downlink reference signals.
  • Precoding vector so that the noise and interference between multiple downlink reference signals corresponding to the uplink data stream can cancel each other to a certain extent, and then can improve the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem.
  • the signal received by the terminal device is disturbed by noise, and the required information cannot be decoded, resulting in the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • a method for precoding includes: receiving downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, wherein the repetition times is used to indicate each uplink data stream The number of downlink reference signals corresponding to the stream, wherein the downlink reference signal corresponding to each upstream data stream is used to determine the precoding vector corresponding to the upstream data stream, and the precoding vector is used to precode the upstream data stream; according to The repetition times, the number of upstream data streams and the preset rule determine a plurality of downlink reference signals corresponding to each upstream data stream in the at least one upstream data stream.
  • the terminal device determines the downlink reference signal corresponding to each of the multiple uplink data streams according to the number of uplink data streams, the preset rule and the repetition times. In this way, the terminal device can determine the precoding vector corresponding to the upstream data stream according to the downlink reference signal, so as to perform precoding on the upstream data stream.
  • the multiple downlink reference signals corresponding to each uplink data stream can be processed so that multiple The noise and interference between the downlink reference signals can cancel each other to a certain extent, thereby improving the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem that the signal received by the terminal device is interfered by noise and cannot be decoded.
  • the required information leads to the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • a method for precoding includes: a terminal device determines downlink reference signals of at least two ports associated with a target data stream; the terminal device determines the downlink reference signals according to the downlink reference signals of the at least two ports The upstream precoding vector of the target data stream.
  • determining, by the terminal device, downlink reference signals of at least two ports associated with the target data stream includes: the terminal device receiving data from multiple ports associated with multiple data streams. a downlink reference signal, the multiple data streams include the target data stream; the terminal device determines the downlink reference signals of the at least two ports associated with the target data stream from the downlink reference signals of the multiple ports associated with the multiple data streams .
  • determining, by the terminal device, downlink reference signals of the at least two ports associated with the target data stream includes: acquiring, by the terminal device, rank numbers of multiple data streams, and the The rank number of multiple data streams is used to indicate the number of the multiple data streams; the terminal device obtains the number of repetitions, and the number of repetitions is used to indicate the number of repetitions of each of the multiple data streams; the terminal device obtains a repetition pattern, where the repetition pattern includes an association relationship between each data flow in the multiple data flows and the port of the downlink reference signal corresponding to each data flow; the terminal device according to the rank number of the multiple data flows, the repetition The mode and the number of repetitions determine downlink reference signals of at least two ports associated with the target data stream.
  • the terminal device determines the downlink reference of at least two ports associated with the target data stream according to the rank of the multiple data streams, the repetition pattern and the repetition number
  • the signal includes: the terminal device determines the corresponding relationship between the target data stream and the port according to the rank number of the multiple data streams and the repetition pattern; the terminal device determines the corresponding relationship of the target data stream according to the corresponding relationship and the repetition times. port; the terminal device receives the downlink reference signal of the target data stream on the port associated with the target data stream, and the number of the downlink reference signal is the same as the number of repetitions.
  • acquiring, by the terminal device, the repetition pattern includes: the terminal device receiving indication information, where the indication information includes the repetition pattern.
  • acquiring the repetition pattern by the terminal device includes: acquiring the repetition pattern by the terminal device according to pre-configured information.
  • obtaining, by the terminal device, the rank numbers of multiple data streams includes: the terminal device receiving first downlink control information DCI, where the first DCI includes the multiple data streams.
  • the rank of the data stream includes: the terminal device receiving first downlink control information DCI, where the first DCI includes the multiple data streams.
  • obtaining, by the terminal device, the number of repetitions includes: the terminal device receiving a second DCI, where the second DCI includes the number of repetitions.
  • obtaining, by the terminal device, the number of repetitions includes: obtaining, by the terminal device, the number of the ports; number determines the number of repetitions.
  • the terminal device determines the number of repetitions according to the number of the ports and the rank numbers of the multiple data streams, including: the number of the ports passed by the terminal device and the number of the ports.
  • the number of repetitions is determined by dividing and rounding down the ranks of the multiple data streams.
  • obtaining, by the terminal device, the number of the ports includes: the terminal device receiving a signaling message, where the signaling message includes the number of the ports.
  • the downlink reference signal includes a channel state information reference signal CSI-RS.
  • the terminal device determines the downlink reference signal corresponding to each of the multiple uplink data streams according to the number of uplink data streams, the preset rule and the repetition times. In this way, the terminal device can determine the precoding vector corresponding to the upstream data stream according to the downlink reference signal, so as to perform precoding on the upstream data stream.
  • the multiple downlink reference signals corresponding to each uplink data stream can be processed so that multiple The noise and interference between the downlink reference signals can cancel each other to a certain extent, thereby improving the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem that the signal received by the terminal device is interfered by noise and cannot be decoded.
  • the required information leads to the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • a method for precoding includes: precoding multiple downlink reference signals; sending the multiple downlink reference signals after precoding, wherein the multiple downlink reference signals after precoding are The measurement result of the reference signal is used to determine the upstream precoding vector corresponding to the upstream data stream.
  • the uplink precoding vector is determined according to the uplink precoding vectors corresponding to the multiple downlink reference signals, and each uplink precoding vector is the Each downlink reference signal in the reference signal is determined by measurement.
  • the uplink precoding vector corresponding to each downlink reference signal is determined according to the equivalent downlink channel matrix corresponding to each downlink reference signal, and each downlink reference signal The corresponding equivalent downlink channel matrix is obtained by measuring each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is the average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream.
  • the precoding vector is the sum of downlink precoding vectors corresponding to the multiple downlink reference signals.
  • the network device can facilitate the terminal device to obtain the uplink precoding vector corresponding to the uplink data stream more accurately according to the measurement results of the multiple downlink reference signals, and improve the uplink precoding rate.
  • the accuracy of the coding vector can thereby reduce the signal interference between multiple users, which is beneficial to improve the signal quality.
  • the terminal device when the signal-to-noise ratio of the downlink reference signal received by the terminal device is low, it is convenient for the terminal device to process multiple downlink reference signals, and process the uplink precoding vectors corresponding to the multiple downlink reference signals into one uplink data stream
  • the corresponding uplink precoding vector enables noise and interference between multiple downlink reference signals corresponding to the uplink data stream to cancel each other to a certain extent.
  • the signal-to-noise ratio of the received downlink reference signal can be improved, thereby further solving the problem that the signal received by the terminal device is interfered by noise, and the required information cannot be decoded, resulting in the inability to obtain the uplink precoding vector corresponding to the uplink data stream. , thereby improving the accuracy of the uplink precoding matrix and the robustness of uplink transmission.
  • a method for precoding comprising: generating downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, wherein the number of repetitions is used to indicate each uplink data stream the number of downlink reference signals corresponding to the stream, wherein the downlink reference signal corresponding to each upstream data stream is used to determine a precoding vector corresponding to the upstream data stream, and the precoding vector is used to precode the upstream data stream,
  • the downlink reference signal corresponding to each uplink data stream is determined according to the number of repetitions, the number of the uplink data stream and the preset rule; the downlink control information is sent.
  • the network device indicates the number of repetitions and the number of upstream data streams to the terminal device through the downlink control information, so that the terminal device can determine the number of upstream data streams corresponding to each of the multiple upstream data streams according to the number of upstream data streams, the preset rule and the number of repetitions.
  • Downlink reference signal In this way, it is convenient for the terminal device to determine the precoding vector corresponding to the upstream data stream according to the downlink reference signal, so as to perform precoding on the upstream data stream.
  • the multiple downlink reference signals corresponding to each uplink data stream can be processed so that the The noise and interference between multiple downlink reference signals can cancel each other to a certain extent, thereby improving the signal-to-noise ratio of the downlink reference signal received by the terminal device, thereby further solving the problem that the signal received by the terminal device is interfered by noise and cannot be Decoding the required information results in the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • a method for precoding comprising: a network device sending downlink reference signals of at least two ports associated with a target data stream, where the downlink reference signals of the at least two ports are used to determine the target data The upstream precoding vector for the stream.
  • the network device sending downlink reference signals of at least two ports associated with a target data stream includes: the network device sending a plurality of ports associated with multiple data streams.
  • Downlink reference signals, the multiple data streams include the target data stream, and the downlink reference signals of the multiple ports associated with the multiple data streams include the downlink reference signals of the at least two ports associated with the target data stream.
  • the network device sends downlink reference signals of at least two ports associated with the target data stream, including: the network device according to the rank number and repetition pattern of the multiple data streams
  • the downlink reference signals of at least two ports associated with the target data stream are sent with the repetition times.
  • the network device sends the downlink reference signals of the at least two ports associated with the target data stream according to the rank, repetition mode and repetition times of the multiple data streams, Including: the network device determines the corresponding relationship between the target data stream and the port according to the rank number of the multiple data streams and the repetition pattern; the network device determines the port corresponding to the target data stream according to the corresponding relationship and the number of repetitions; The network device sends the downlink reference signal of the target data stream on the port associated with the target data stream, and the number of the downlink reference signal is the same as the number of repetitions.
  • the method further includes: sending, by the network device, indication information, where the indication information includes the repetition pattern.
  • the method further includes: acquiring, by the network device, the repetition pattern according to pre-configured information.
  • the method further includes: sending, by the network device, a first DCI, where the first DCI includes rank numbers of the multiple data streams.
  • the method further includes: the network device sending a second DCI, where the second DCI includes the number of repetitions.
  • the method further includes: sending, by the network device, the number of the ports, where the number of the ports is used to determine the number of repetitions.
  • sending the number of ports by the network device includes: sending, by the network device, a signaling message, where the signaling message includes the number of ports.
  • the downlink reference signal includes CSI-RS.
  • the network device sends multiple downlink reference signals corresponding to the upstream data stream on the port associated with the upstream data stream, and sends the associated information to the terminal device in the DCI, so that the terminal device can predict the number of upstream data streams according to the number of upstream data streams.
  • the downlink reference signal corresponding to each upstream data stream in the multiple upstream data streams is determined by setting the rule and the number of repetitions. In this way, the terminal device can determine the precoding vector corresponding to the upstream data stream according to the downlink reference signal, so as to perform precoding on the upstream data stream.
  • the multiple downlink reference signals corresponding to each uplink data stream can be processed so that multiple The noise and interference between the downlink reference signals can cancel each other to a certain extent, thereby improving the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem that the signal received by the terminal device is interfered by noise and cannot be decoded.
  • the required information leads to the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • an apparatus for precoding includes: a transceiver unit configured to receive multiple precoded downlink reference signals; a determination unit configured to perform the multiple downlink reference signals for the multiple downlink reference signals.
  • the reference signal is measured to determine the upstream precoding vector corresponding to the upstream data stream.
  • the determining unit is configured to measure the multiple downlink reference signals, and determine the uplink precoding vector corresponding to the uplink data stream, specifically including: the determining unit is configured to: Measure each of the multiple downlink reference signals, determine an uplink precoding vector corresponding to each downlink reference signal, and determine the uplink precoding vector according to the uplink precoding vectors corresponding to the multiple downlink reference signals.
  • the determining unit is configured to measure each downlink reference signal in the plurality of downlink reference signals, and determine the uplink precoding corresponding to each downlink reference signal
  • the vector specifically includes: the determining unit is configured to measure each downlink reference signal, obtain an equivalent downlink channel matrix corresponding to each downlink reference signal, and determine each downlink channel matrix according to the equivalent downlink channel matrix corresponding to each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is configured to measure each downlink reference signal, obtain an equivalent downlink channel matrix corresponding to each downlink reference signal, and determine each downlink channel matrix according to the equivalent downlink channel matrix corresponding to each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is the average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream.
  • the precoding vector is the sum of downlink precoding vectors corresponding to the multiple downlink reference signals.
  • the apparatus further includes: a processing unit configured to precode the upstream data stream based on the upstream precoding vector.
  • the processing unit is configured to precode the upstream data stream based on the upstream precoding vector, specifically including: the processing unit is configured to perform the upstream precoding vector Perform processing, and perform precoding on the upstream data stream according to the processed upstream precoding vector.
  • the processing unit is configured to precode the upstream data stream based on the upstream precoding vector, specifically including: the processing unit is specifically configured to use the upstream precoding The vector precodes the upstream data stream.
  • each downlink reference signal in the plurality of downlink reference signals is precoded by a downlink precoding vector, and the downlink precoding vector is obtained by Determined by measurement.
  • an apparatus for precoding includes: a transceiver unit, the transceiver unit is configured to receive downlink control information, the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, wherein the repetition The number of times is used to indicate the number of downlink reference signals corresponding to each upstream data stream, wherein the downlink reference signal corresponding to each upstream data stream is used to determine the precoding vector corresponding to the upstream data stream, and the precoding vector is used for the Precoding the upstream data stream; a determining unit, the processing unit is configured to determine a plurality of downlink references corresponding to each upstream data stream in the at least one upstream data stream according to the number of repetitions, the number of the upstream data stream and a preset rule Signal.
  • an apparatus for precoding comprising: a communication unit configured to determine downlink reference signals of at least two ports associated with a target data stream; a processing unit configured to The downlink reference signals of the at least two ports determine an uplink precoding vector of the target data stream.
  • the communication unit is configured to determine downlink reference signals of at least two ports associated with the target data stream, including: the communication unit is configured to receive multiple data streams associated with Downlink reference signals of a plurality of ports, the plurality of data streams include the target data stream; the communication unit is further configured to determine, from the downlink reference signals of the plurality of ports associated with the plurality of data streams, the at least one associated with the target data stream Downlink reference signals of two ports.
  • the communication unit is configured to determine downlink reference signals of at least two ports associated with the target data stream, including: the communication unit is configured to acquire ranks of multiple data streams number, the rank number of the multiple data streams is used to indicate the number of the multiple data streams; the communication unit is further configured to obtain the number of repetitions, the number of repetitions is used to indicate the number of repetitions of each of the multiple data streams number of times; the communication unit is further configured to acquire a repetition pattern, the repetition pattern including the association relationship between each data stream in the multiple data streams and the port of the downlink reference signal corresponding to each data stream; the communication unit is also used for Downlink reference signals of at least two ports associated with the target data stream are determined according to the rank numbers of the multiple data streams, the repetition pattern and the number of repetitions.
  • the communication unit is further configured to determine at least two ports associated with the target data stream according to the rank of the plurality of data streams, the repetition pattern and the repetition number
  • the downlink reference signal includes: the communication unit is also used to determine the corresponding relationship between the target data stream and the port according to the rank number of the multiple data streams and the repetition pattern; the communication unit is also used to determine the corresponding relationship between the target data stream and the port according to the corresponding relationship and the The number of repetitions determines the port corresponding to the target data stream; the communication unit is further configured to receive downlink reference signals of the target data stream on the port associated with the target data stream, and the number of the downlink reference signals is the same as the number of repetitions.
  • the communication unit is further configured to acquire a repetition pattern, including: the communication unit is further configured to receive indication information, where the indication information includes the repetition pattern.
  • the communication unit is further configured to acquire the repetition pattern, including: the communication unit is further configured to acquire the repetition pattern according to pre-configured information.
  • the communication unit is configured to acquire the rank numbers of multiple data streams, including: the communication unit is configured to receive first downlink control information DCI, the first DCI Include the rank of the plurality of data streams.
  • obtaining, by the terminal device, the number of repetitions includes: the terminal device receiving a second DCI, where the second DCI includes the number of repetitions.
  • the communication unit is further configured to obtain the number of repetitions, including: the communication unit is further configured to obtain the number of the ports; The number and the rank of the plurality of data streams determine the number of repetitions.
  • the communication unit is further configured to determine the number of repetitions according to the number of the ports and the rank numbers of the multiple data streams, including: the communication unit is further configured to pass The number of ports is divided by the rank number of the plurality of data streams and rounded down to determine the number of repetitions.
  • the communication unit is further configured to acquire the number of the ports, including: the communication unit is further configured to receive a signaling message, where the signaling message includes the number of the ports .
  • the downlink reference signal includes CSI-RS.
  • a tenth aspect provides an apparatus for precoding, the apparatus comprising: a processing unit configured to perform precoding on multiple downlink reference signals; a transceiver unit configured to transmit the precoded Multiple downlink reference signals, wherein the precoded measurement results of the multiple downlink reference signals are used to determine the uplink precoding vector corresponding to the uplink data stream.
  • the uplink precoding vector is determined according to the uplink precoding vectors corresponding to the multiple downlink reference signals, and each uplink precoding vector is the Each downlink reference signal in the reference signal is determined by measurement.
  • the uplink precoding vector corresponding to each downlink reference signal is determined according to the equivalent downlink channel matrix corresponding to each downlink reference signal, and each downlink reference signal corresponds to The equivalent downlink channel matrix of is obtained by measuring each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is the average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream.
  • the precoding vector is the sum of downlink precoding vectors corresponding to the multiple downlink reference signals.
  • an apparatus for precoding comprising: a processing unit configured to generate downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, wherein the The number of repetitions is used to indicate the number of downlink reference signals corresponding to each upstream data stream, wherein the downlink reference signal corresponding to each upstream data stream is used to determine a precoding vector corresponding to the upstream data stream, and the precoding vector is used for Precoding the upstream data stream, and the downlink reference signal corresponding to each upstream data stream is determined according to the repetition times, the number of the upstream data stream, and a preset rule; a transceiver unit, which is used for sending the downlink control unit information.
  • a twelfth aspect provides an apparatus for precoding, the apparatus comprising: a sending unit, the sending unit is configured to send downlink reference signals of at least two ports associated with a target data stream, the downlink reference signals of the at least two ports The signal is used to determine the upstream precoding vector of the target data stream.
  • the sending unit is configured to send downlink reference signals of at least two ports associated with the target data stream, including: the sending unit is configured to send multiple data streams Downlink reference signals of a plurality of associated ports, the plurality of data streams include the target data stream, and downlink reference signals of a plurality of ports associated with the plurality of data streams include downlink reference signals of the at least two ports associated with the target data stream Signal.
  • the sending unit is configured to send downlink reference signals of at least two ports associated with the target data stream, including: The downlink reference signals of at least two ports associated with the target data stream are sent according to the rank, repetition mode and repetition times.
  • the sending unit is configured to send the at least two ports associated with the target data stream according to the rank, repetition mode and repetition number of the multiple data streams.
  • a downlink reference signal including: the sending unit is used to determine the corresponding relationship between the target data stream and the port according to the rank numbers of the multiple data streams and the repetition pattern; the sending unit is also used for the corresponding relationship and the number of repetitions The port corresponding to the target data stream is determined; the sending unit is further configured to send a downlink reference signal of the target data stream on the port associated with the target data stream, and the number of the downlink reference signal is the same as the number of repetitions.
  • the sending unit is further configured to send indication information, where the indication information includes the repetition pattern.
  • the sending unit is further configured to acquire the repetition pattern according to preconfigured information.
  • the sending unit is further configured to send a first DCI, where the first DCI includes the rank numbers of the multiple data streams.
  • the sending unit is further configured to send a second DCI, where the second DCI includes the number of repetitions.
  • the sending unit is further configured to send the number of ports, where the number of ports is used to determine the number of repetitions.
  • the sending unit is further configured to send the number of the port, including: the sending unit is further configured to send a signaling message, where the signaling message includes the port quantity.
  • the downlink reference signal includes CSI-RS.
  • a thirteenth aspect provides a communication device, the communication device comprising: a memory for storing a computer program; a processor for executing part or all of the computer program stored in the memory, so that the The device performs the method of any one of the first to third aspects, or performs the method of any one of the fourth to sixth aspects.
  • a fourteenth aspect provides a computer-readable storage medium, characterized in that it includes a computer program, when part or all of the computer program is run on a computer, causing the computer to perform any one of the first to third aspects.
  • a fifteenth aspect provides a computer program product, comprising a computer program that, when the computer program runs on a computer, causes the computer to perform the method as described in any one of the first to third aspects, or, The computer is caused to perform the method of any one of the fourth to sixth aspects.
  • a sixteenth aspect provides a communication system, comprising the communication device according to any one of the seventh aspect to the ninth aspect, and the communication device according to any one of the tenth aspect to the twelfth aspect .
  • FIG. 1 is a schematic diagram of a system architecture to which an embodiment of the present application is applicable.
  • FIG. 2 is a schematic flowchart of a method for precoding provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of another method for precoding provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of an apparatus for precoding provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of another apparatus for precoding provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • LTE Long Term Evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • 5G new wireless access Access technology
  • NR new radio Access Technology
  • 6G next-generation communication systems
  • the 5G mobile communication system may be a non-standalone (NSA) or a standalone (SA).
  • the technical solutions provided in this application can also be applied to machine type communication (MTC), Long Term Evolution-machine (LTE-M), device-to-device (D2D) Network, machine to machine (M2M) network, internet of things (IoT) network or other network.
  • the IoT network may include, for example, the Internet of Vehicles.
  • vehicle to X, V2X, X can represent anything
  • the V2X may include: vehicle to vehicle (vehicle to vehicle, V2V) communication, vehicle and vehicle Infrastructure (V2I) communication, vehicle to pedestrian (V2P) or vehicle to network (V2N) communication, etc.
  • the network device may be any device with a wireless transceiver function.
  • the device includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) , base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WiFi) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc.
  • evolved Node B evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • base transceiver station base transceiver station
  • BTS home base station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • It can also be 5G, such as NR , a gNB in the system, or, a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or, it can also be a network node that constitutes a gNB or a transmission point, For example, a baseband unit (BBU), or a distributed unit (DU), or a base station in a next-generation communication 6G system, etc.
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, medium access control (MAC) layer, and physical (PHY) layer.
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • the higher-layer signaling such as the RRC layer signaling
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • the network equipment provides services for the cell, and the terminal equipment communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to the small cell, where the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a macro base station for example, a macro eNB or a macro gNB, etc.
  • the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc.
  • these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission
  • a terminal device may also be referred to as user equipment (user equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, Terminal, wireless communication device, user agent or user equipment.
  • user equipment user equipment
  • UE user equipment
  • an access terminal a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, Terminal, wireless communication device, user agent or user equipment.
  • a terminal device may be a device that provides voice/data connectivity to a user, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • some examples of terminals can be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function (such as notebook computer, palmtop computer, etc.), mobile internet device (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in unmanned driving (self driving), wireless terminals in remote medical (remote medical) Terminal, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless Telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device, computing device or connection with wireless communication capabilities
  • wearable devices can also be called wearable smart devices, which is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device may also be a terminal device in an Internet of things (Internet of things, IoT) system.
  • IoT Internet of things
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to connect items to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things. IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow-band NB technology.
  • terminal equipment can also include sensors such as smart printers, train detectors, and gas stations.
  • the main functions include collecting data (part of terminal equipment), receiving control information and downlink data of network equipment, and sending electromagnetic waves to transmit uplink data to network equipment. .
  • FIG. 1 To facilitate understanding of the embodiments of the present application, a communication system applicable to the methods provided by the embodiments of the present application is first described in detail with reference to FIG. 1 .
  • FIG. 1 shows a schematic diagram of a communication system 100 suitable for the method provided by this embodiment of the present application.
  • the communication system 100 may include at least one network device, such as the network device 101 in the 5G system as shown in FIG. 1 ; the communication system 100 may also include at least one terminal device, as shown in FIG. 1 .
  • Terminal devices 102 to 107 may be mobile or stationary.
  • Each of the network device 101 and one or more of the end devices 102 to 107 may communicate over a wireless link.
  • Each network device can provide communication coverage for a specific geographic area and can communicate with terminal devices located within that coverage area.
  • the network device may send configuration information to the terminal device, and the terminal device may send uplink data to the network device based on the configuration information; for another example, the network device may send downlink data to the terminal device. Therefore, the network device 101 and the terminal devices 102 to 107 in Fig. 1 constitute a communication system.
  • D2D technology can be used to realize direct communication between terminal devices.
  • D2D technology can be used for direct communication between terminal devices 105 and 106 and between terminal devices 105 and 107 .
  • Terminal device 106 and terminal device 107 may communicate with terminal device 105 individually or simultaneously.
  • the terminal devices 105 to 107 can also communicate with the network device 101, respectively. For example, it can communicate directly with the network device 101, as shown in the figure, the terminal devices 105 and 106 can directly communicate with the network device 101; it can also communicate with the network device 101 indirectly, as in the figure, the terminal device 107 communicates with the network device via the terminal device 106. 101 Communications.
  • FIG. 1 exemplarily shows a network device, a plurality of terminal devices, and communication links between the communication devices.
  • the communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of terminal devices, such as more or less terminal devices. This application does not limit this.
  • Each of the above communication devices may be configured with multiple antennas.
  • the plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals.
  • each communication device additionally includes a transmitter chain and a receiver chain, which can be understood by those of ordinary skill in the art, all of which may include multiple components (eg, processors, modulators, multiplexers) related to signal transmission and reception. , demodulator, demultiplexer or antenna, etc.). Therefore, the network device and the terminal device can communicate through the multi-antenna technology.
  • the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which are not limited in this embodiment of the present application.
  • network entities such as a network controller, a mobility management entity, and the like, which are not limited in this embodiment of the present application.
  • the processing process of the downlink signal at the physical layer before sending may be performed by a network device, or may be performed by a component (such as a chip or a system of chips, etc.) configured in the network device.
  • a component such as a chip or a system of chips, etc.
  • network devices For convenience of description, hereinafter collectively referred to as network devices.
  • the network device can process the code word on the physical channel.
  • the codewords may be coded bits that have been coded (eg, including channel coding).
  • the codeword is scrambled to generate scrambled bits.
  • the scrambled bits are subjected to modulation mapping to obtain modulation symbols.
  • Modulation symbols are mapped to multiple layers, or transport layers, through layer mapping.
  • the modulation symbols after layer mapping are precoded to obtain a precoded signal.
  • the precoded signal is mapped to multiple REs after being mapped by resource elements (REs). These REs are then modulated by orthogonal frequency division multiplexing (OFDM) and then transmitted through an antenna port (antenna port).
  • OFDM orthogonal frequency division multiplexing
  • the methods provided in the embodiments of the present application may be applied to a system that communicates through a multi-antenna technology.
  • the communication system 100 shown in FIG. 1 The communication system may include at least one network device and at least one terminal device. Communication between network equipment and terminal equipment is possible through multi-antenna technology.
  • the methods provided in the embodiments of the present application are not limited to the communication between the network device and the terminal device, and can also be applied to the communication between the terminal device and the terminal device.
  • the present application does not limit the scenarios in which the method is applied.
  • the method provided by the embodiments of the present application is described in detail by taking the interaction between a network device and a terminal device as an example.
  • the embodiments shown below do not particularly limit the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be executed according to the present application.
  • the method provided by the embodiment of the application can be used for communication, for example.
  • the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call a program and execute the program.
  • Precoding technology When the channel state is known, the sending device (such as network device) can process the signal to be sent with the help of a precoding matrix that matches the channel state, so that the precoded signal to be sent is different from the channel state. Therefore, the complexity of eliminating the influence between the channels by the receiving device (such as the terminal device) is reduced. Therefore, the received signal quality (eg, signal to interference plus noise ratio (SINR), etc.) is improved through the precoding process of the signal to be transmitted. Therefore, by using precoding technology, the transmitting device and multiple receiving devices can transmit on the same time-frequency resources, that is, multi-user multiple input multiple output (MU-MIMO) is realized.
  • MU-MIMO multi-user multiple input multiple output
  • the sending device may also perform precoding in other manners.
  • the channel information eg, but not limited to, the channel matrix
  • a preset precoding matrix or a weighting processing method is used to perform precoding and the like.
  • the specific content is not repeated here.
  • Antenna port referred to as port.
  • An antenna port can be understood as a transmit antenna recognized by a receiving device, or a transmit antenna that can be distinguished in space.
  • Each antenna port may correspond to a reference signal, therefore, each antenna port may be called a port of a reference signal, for example, a channel state information reference signal (CSI-RS) port, a sounding reference signal ( sounding reference signal, SRS) port, etc.
  • CSI-RS channel state information reference signal
  • SRS sounding reference signal
  • the terminal device can determine the precoding matrix based on the channel measurement.
  • the terminal device may determine the channel matrix through channel estimation or the like or based on channel reciprocity.
  • the precoding matrix can be obtained by performing singular value decomposition (singular value decomposition, SVD) on the channel matrix or the covariance matrix of the channel matrix, or, it can also be obtained by performing eigenvalue decomposition on the covariance matrix of the channel matrix. , EVD) method.
  • singular value decomposition singular value decomposition
  • SVD singular value decomposition
  • EVD eigenvalue decomposition
  • the precoding matrix determined by the terminal device may be called the precoding matrix to be fed back, or the precoding matrix to be reported.
  • the terminal device may indicate the precoding matrix to be fed back through a precoding matrix indicator (precoding matrix indicator, PMI), so that the network device can restore the precoding matrix based on the PMI.
  • PMI precoding matrix indicator
  • the precoding matrix recovered by the network device based on the PMI may be the same as or similar to the precoding matrix to be fed back.
  • the precoding vector may be determined by a vector in the precoding matrix, for example, a column vector.
  • the precoding matrix may include one or more column vectors, each of which may be used to determine a precoding vector.
  • the precoding matrix may also be referred to as a precoding vector.
  • the precoding matrix may be determined by precoding vectors of one or more transport layers, and each vector in the precoding matrix may correspond to a transport layer.
  • the rank of the upstream data stream may be the rank fed back by the network device based on the channel measurement, wherein the network device may measure the channel according to the uplink reference signal.
  • the rank fed back by the network device based on the channel measurement may be equal to the number of transmission layers, that is, the number of upstream data streams.
  • CSI-RS used to measure the channel between the base station and the UE, and obtain the channel state information required for scheduling and link adaptation, such as precoding matrix, channel quality information, etc.
  • the downlink reference signal involved in the embodiments of this application may include CSI-RS.
  • "for indicating” may include direct indicating and indirect indicating.
  • the indication information may directly indicate I or indirectly indicate I, but it does not mean that the indication information must carry I.
  • the information indicated by the indication information is called the information to be indicated.
  • the information to be indicated can be directly indicated, such as the information to be indicated itself or the information to be indicated. Indicating the index of information, etc.
  • the information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance.
  • the indication information is used to indicate six vectors, so the information to be indicated is six vectors, but in fact only five vectors are indicated by the indication information, and the other vector does not need to be indicated, but when describing, It can still be described as indicating that the information is used to indicate six vectors.
  • the indication information only indicates a part (five vectors) of the information to be indicated (six vectors), and the other part of the information to be indicated (the remaining one vector) is known or agreed in advance.
  • the indication information is used to indicate the weighting coefficient of each vector, but in fact, only the weighting coefficients of five vectors are indicated by the indication information, and the weighting coefficients of another vector do not need to be indicated, but when describing , which can still be described as indicating that the information is used to indicate the weighting coefficient of each vector.
  • the indication information only indicates a part of the information to be indicated (the weighting coefficients of the six vectors) (the weighting coefficients of the five vectors), and the other part of the information to be indicated (the weighting coefficients of the remaining one vector) is known, or agreed in advance.
  • the indication of specific information can also be implemented by means of a pre-agreed (for example, a protocol stipulated) arrangement order of various information, so as to reduce the indication overhead to a certain extent.
  • a pre-agreed for example, a protocol stipulated
  • the common part of each piece of information can also be identified and indicated uniformly, so as to reduce the indication overhead caused by indicating the same information separately.
  • a precoding matrix is composed of precoding vectors, and each precoding vector in the precoding matrix may have the same parts in terms of composition or other properties.
  • the specific indication manner may also be various existing indication manners, such as, but not limited to, the above indication manner and various combinations thereof.
  • various indication modes reference may be made to the prior art, and details are not described herein again. It can be seen from the above that, for example, when multiple pieces of information of the same type need to be indicated, different information may be indicated in different manners.
  • a desired indication manner may be selected according to specific needs, and the selected indication manner is not limited in this embodiment of the present application.
  • the indication manners involved in the embodiments of the present application should be understood to cover various methods that can enable the party to be instructed to learn the information to be instructed.
  • a row vector can be represented as a column vector
  • a matrix can be represented by a transposed matrix of the matrix
  • a matrix can also be represented in the form of a vector or an array.
  • the vector or array It can be formed by connecting each row vector or column vector of the matrix, and the Kronecker product of two vectors can also be expressed by the product of one vector and the transposed vector of another vector, etc.
  • the information to be indicated may be sent together as a whole, or may be divided into multiple sub-information and sent separately, and the transmission periods and/or transmission timings of these sub-information may be the same or different.
  • the specific sending method is not limited in this application.
  • the sending period and/or sending timing of these sub-information may be predefined, for example, predefined according to a protocol, or configured by the transmitting end device by sending configuration information to the receiving end device.
  • the configuration information may include, for example but not limited to, radio resource control signaling, such as radio resource control (radio resource control, RRC) signaling, MAC layer signaling, such as MAC-information element (control element, CE), and physical Layer signaling, such as one or a combination of at least two of downlink control information (downlink control information, DCI).
  • radio resource control signaling such as radio resource control (radio resource control, RRC) signaling
  • MAC layer signaling such as MAC-information element (control element, CE)
  • CE MAC-information element
  • DCI downlink control information
  • the precoding vector may refer to a vector in the precoding matrix, for example, a column vector.
  • the precoding matrix may contain precoding vectors of one or more transport layers, and each column vector in the precoding matrix may correspond to a transport layer.
  • the first, second, third, fourth, and various numeral numbers are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish between different indication information and so on.
  • pre-acquisition may include signaling or pre-definition by the network device, eg, protocol definition.
  • pre-definition can be realized by pre-saving corresponding codes, forms or other methods that can be used to indicate relevant information in the equipment (for example, including terminal equipment and network equipment). limited.
  • the "protocols" involved in the embodiments of this application may refer to standard protocols in the communication field, such as LTE protocols, NR protocols, and related protocols applied in future communication systems, which are not limited in this application.
  • At least one means one or more, and “plurality” means two or more.
  • And/or which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b and c can represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a , b and c, where a, b, and c can be single or multiple.
  • FIG. 2 is a schematic flowchart of a method for precoding provided by an embodiment of the present application.
  • the network device precodes multiple downlink reference signals.
  • the terminal device may first send an uplink reference signal, such as an SRS, to the network device. It can be that one terminal device sends one uplink reference signal to the network device, one terminal device can send multiple uplink reference signals to the network device on multiple antenna ports, or multiple terminal devices can send their respective uplink reference signals on multiple antenna ports. Corresponding uplink reference signal.
  • the network device receives the uplink reference signal, it measures the uplink reference signal to obtain the uplink channel matrix.
  • the downlink channel matrix can be determined based on the channel reciprocity, and the downlink precoding vector is obtained by calculation, and the downlink precoding vector is loaded into the downlink reference signal. send on.
  • the network device precodes multiple downlink reference signals, and then can send the precoded downlink reference signals to the terminal device.
  • each downlink reference signal can be obtained through the above process, that is, each downlink reference signal can be precoded by a downlink precoding vector and sent to the terminal device.
  • the measurement results of the precoded multiple downlink reference signals are used to determine the uplink precoding vector corresponding to the uplink data stream. Therefore, it should be understood that when precoding each downlink reference signal, a network device (such as a base station) can design the used precoding vector, so that the terminal device can perform channel measurement on each precoded downlink reference signal. Afterwards, the obtained equivalent downlink channel matrix can be used to obtain an uplink precoding vector, for example, the uplink precoding vector is equal to the equivalent downlink channel matrix, or is equal to the normalized equivalent downlink channel matrix.
  • the network device sends multiple precoded downlink reference signals.
  • the terminal device receives multiple precoded downlink reference signals.
  • the multiple downlink reference signals sent by the network device correspond to the same upstream data stream. Since the channel of each antenna port is different, even if the downlink reference signals corresponding to the same upstream data stream are sent, the actual network Each precoded downlink reference signal sent by the device may also be different. Therefore, the terminal device can process the multiple downlink reference signals by receiving the multiple precoded downlink reference signals sent by the network device to obtain the uplink precoding vector corresponding to the upstream data stream.
  • the terminal device measures the multiple downlink reference signals, and determines an uplink precoding vector corresponding to the uplink data stream.
  • the multiple downlink reference signals are downlink reference signals corresponding to the same upstream data stream, and the terminal device can determine the corresponding downstream data stream by measuring the multiple downlink reference signals corresponding to the same upstream data stream. Precoding vector.
  • the terminal device may measure each of the multiple downlink reference signals, determine the uplink precoding vector corresponding to each downlink reference signal, and then determine the uplink precoding vector corresponding to the downlink reference signals.
  • the upstream precoding vector corresponding to the upstream data stream may be measured by the terminal device.
  • the terminal device may determine the uplink precoding vector of each of the multiple downlink reference signals in various ways. For example, the terminal device may measure each of the multiple downlink reference signals, obtain an equivalent downlink channel matrix corresponding to each downlink reference signal, and determine each downlink reference signal according to the equivalent downlink channel matrix Corresponding uplink precoding vector.
  • the uplink precoding vector corresponding to the downlink reference signal may be equal to its equivalent downlink channel matrix, or equal to the normalized equivalent downlink channel matrix. Therefore, it should be understood that when precoding each downlink reference signal, a network device (such as a base station) can design the used precoding vector, so that the terminal device can perform channel measurement on each precoded downlink reference signal.
  • the obtained equivalent downlink channel matrix can be used to obtain an uplink precoding vector, for example, the uplink precoding vector is equal to the equivalent downlink channel matrix, or is equal to the normalized equivalent downlink channel matrix.
  • the terminal device may also determine the uplink precoding vector corresponding to the uplink data stream according to the uplink precoding vectors corresponding to the above-mentioned multiple downlink reference signals in various ways. For example, the terminal device may sum multiple uplink precodings corresponding to multiple downlink reference signals to obtain one uplink precoding vector corresponding to one uplink data stream; or, the terminal device may also add multiple uplink precodings corresponding to multiple downlink reference signals. The average value of the uplink precoding vectors is calculated, and the average value is used as an uplink precoding vector corresponding to one uplink data stream.
  • the processing of multiple uplink precoding vectors corresponding to multiple downlink reference signals in this embodiment of the present application is only an example and not limited. It should be understood that multiple uplink precoding vectors corresponding to multiple downlink reference signals may be processed into one The methods for an upstream and coding vector corresponding to the upstream data stream are all within the protection scope of the present application.
  • the uplink precoding vector corresponding to the upstream data streams can be determined by various methods. For example, each downlink reference signal of the same uplink data stream can be measured to determine the uplink precoding vector corresponding to each downlink reference signal, and then determined by the uplink precoding vector corresponding to these downlink reference signals; All downlink reference signals corresponding to the upstream data stream are measured together, and then the equivalent channel matrix is processed.
  • the processing of the equivalent channel matrix may be to sum the columns corresponding to a certain upstream data stream, or to normalize after the summation; it may also be to average the columns corresponding to a certain upstream data stream, or Normalization is performed after averaging.
  • the terminal device may further precode the upstream data stream based on the upstream precoding vector.
  • the upstream precoding vector may be directly used to precode the upstream data stream, or the obtained upstream precoding vector may be processed first, and then the upstream data stream may be precoded.
  • the processing of the uplink precoding vector may be to allocate power among subbands based on the power planning between subbands, and then precode the upstream data stream according to the allocated power.
  • the solutions provided by the embodiments of the present application can measure multiple downlink reference signals, so that the terminal device can more accurately obtain the uplink precoding vector corresponding to the uplink data stream according to the measurement result, thereby improving the accuracy of the uplink precoding vector. For example, when the signal-to-noise ratio of the downlink reference signal received by the terminal device is relatively low, the uplink precoding vector corresponding to the multiple downlink reference signals can be processed into the uplink precoding vector corresponding to one uplink data stream by processing the multiple downlink reference signals.
  • Precoding vector so that the noise and interference between multiple downlink reference signals corresponding to the uplink data stream can cancel each other to a certain extent, and then can improve the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem.
  • the signal received by the terminal device is disturbed by noise, and the required information cannot be decoded, resulting in the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • FIG. 3 is a schematic flowchart of another method for precoding provided by an embodiment of the present application.
  • the network device generates downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams.
  • the terminal device may first send the SRS to the network device.
  • the network device measures the uplink channel according to the SRS, and determines the number and repetition times of the uplink data stream that the terminal device can send according to the channel measurement result. It should be understood that the network device can determine the number of upstream data streams and the number of repetitions according to the measurement result of the SRS measuring the upstream channel, and generate downlink control information, or can also determine the number of upstream data streams in other ways, such as pre-configured information in the network device. number and repetition times, and generate downlink control information. This application does not limit the manner in which the network device determines the number and repetition times of upstream data streams.
  • the network device can also determine the related information of the port configured for the terminal device, for example, the network device can determine the number and quantity of the port for sending the downlink reference signal. Specifically, the network device can, according to the measurement result of the uplink channel, after determining the number of upstream data streams that the terminal device can send and the number of repetitions, it can multiply the number of upstream data streams and the number of repetitions to obtain the actual needs of the terminal device. the number of ports.
  • the number of ports configured by a network device is usually a value of 2 to the power of k, where k is a positive integer, such as 2, 4, 8, and so on.
  • the number of ports configured by the network device is greater than the number of ports actually occupied.
  • the number of ports configured by the network device for the terminal device can be 4.
  • the configured 4 ports can be The equivalent channel after channel estimation on the first three ports is used to determine the upstream precoding vector of the three upstream data streams; for another example, when the number of upstream data streams is 3 and the number of repetitions is 2, the actual The number of received ports is 6, and the number of ports configured by the network device is 8, then the terminal device can receive the downlink reference signals of the 3 upstream data streams on the first 6 ports of the 8 ports, and perform channel estimation to obtain The precoding vectors corresponding to the three upstream data streams. In addition, the network device can configure the number of ports for the terminal device through signaling.
  • the number of specific ports can be configured for the terminal device through the cell nrofPorts related to the number of ports in the RRC signaling.
  • an antenna port has a corresponding relationship with a downlink reference signal resource.
  • an antenna port may correspond to an identifier (identifier, ID) of a downlink reference signal, or may correspond to a time-frequency resource location for sending a downlink reference signal, and the network device is a terminal device.
  • the configuration port can also be understood as the network device configuring downlink reference signal resources for the terminal device.
  • the network device sends downlink control information to the terminal device, and the terminal device receives the downlink control information.
  • the terminal device After the terminal device receives the downlink control information sent by the network device, it can acquire the number and repetition times of the upstream data stream. Specifically, the terminal device can directly obtain the number and repetition times of the upstream data stream through specific fields in the downlink control information. For example, when the downlink control information indicates the number of upstream data streams, the existing downlink control information can be multiplexed, and the number of upstream data streams can be obtained in the Transport Precoding Matrix Indicator (TPMI), that is, in the TPMI Only the part indicating the number of upstreams is valid. Alternatively, a new field is added to the downlink control information to indicate the number of uplink data streams. Likewise, the existing downlink control information may be reused or a new field may be added to the downlink control information to indicate the number of repetitions.
  • TPMI Transport Precoding Matrix Indicator
  • the terminal device may also acquire the number and repetition times of the uplink data stream by other means. Specifically, the actual number of ports used is the product of the number of upstream data streams and the number of repetitions. Therefore, the terminal device can determine the third parameter. It should be understood that the number of ports actually used is the number of downlink reference signals actually received by the terminal device.
  • the number of repetitions can be calculated by dividing the number of ports and the number of upstream data streams to an integer. For example, when the number of indicated upstream data streams is 2 and the number of configured ports is 4, the number of repetitions can be calculated to be 2; when the number of indicated upstream data streams is 3 and the number of configured ports is 8, then The number of repetitions can be calculated to be 2.
  • the number of repetitions is used to indicate the number of downlink reference signals corresponding to each upstream data stream, and the terminal device may determine multiple downlink reference signals corresponding to each upstream data stream according to preset rules, the number of upstream data streams and the number of repetitions.
  • the preset rules can be understood as the correspondence between different upstream data streams and ports, and are usually pre-configured in network equipment and terminal equipment. Take 4 ports, 2 upstream data streams, and repeat 2 times as an example, number the upstream data streams as data stream #1 and data stream #2, the preset rules can be "#1, #2, #1, # 2" or "#1, #1, #2, #2". It should be understood that when 3 upstream data streams are repeated 2 times, the upstream data streams are numbered as data stream #1, data stream #2, and data stream #3, and the preset rules "#1, #2, #3, # 1.
  • the preset rules "#1, #2, #1, #2, #1, #2” and the above "#1, #2, #1, #2” are the same preset rules, the preset rules " #1, #1, #1, #2, #2, #2” and the above-mentioned "#1, #1, #2, #2” are the same preset rules; when 2 upstream data streams are repeated 3 times, the upstream data streams are numbered as data stream #1, data stream # 2.
  • the preset rules "#1, #2, #1, #2, #1, #2” and the above "#1, #2, #1, #2” are the same preset rules, the preset rules " #1, #1, #1, #2, #2, #2” and the above-mentioned "#1, #1, #2, #2” are the same preset rules.
  • the above preset rules are only examples and are not limited.
  • the preset rules of the type "#1, #2, #1, #2” in the repetition of 2 upstream data streams are named as the first preset rules
  • the "#1, #1, #2” , #2” type of preset rule is named as the second preset rule. That is, the first preset rule is that the downlink reference signals of m upstream data streams are arranged in sequence according to the port number, repeated n times, m is a positive integer, and n is a positive integer greater than or equal to 2
  • the second preset rule is a number of Each upstream data flow in the upstream data flow is repeated b times in sequence according to the port number, a is a positive integer, and b is a positive integer greater than or equal to 2.
  • the preset rules in the specific embodiments of the present application are not limited to the first preset rule or the second preset rule or the arrangement according to a certain rule, but also include other arrangements.
  • an arrangement such as "#1, #2, #2, #1” or “#2, #1, #2, #1” can also be used as a pre- Set a rule; when the number of repetitions is not fixed, such as 4 ports, 3 upstream data streams, and data stream #1 is repeated 2 times, "#1, #1, #2, #3", "#2, Permutations and combinations such as "#1, #1, #3” or "#2, #3, #1, #1” can be used as a preset rule. That is to say, the permutations and combinations of different upstream data streams and ports may be included in the preset rules involved in the embodiments of the present application.
  • Preset rules are usually preconfigured in network devices and end devices. If there is only one preset rule preconfigured in the network device and the terminal device, the network device and the terminal device directly invoke the preset rule according to the preconfigured information. In this embodiment of the present application, that is, the network device sends the downlink reference signal of each uplink data stream in the at least one uplink data stream in the specified downlink reference signal resource according to the preset rule, and accordingly the terminal device follows the preconfigured downlink reference signal.
  • the preset rule determines the downlink reference signal corresponding to each uplink data stream in the downlink reference signal resource.
  • the network device sends the downlink reference signal of each upstream data stream in the at least one upstream data stream in the specified downlink reference signal resource according to one of the preset rules, and transmits the downlink reference signal through the
  • the indication information informs the terminal device to determine the downlink reference signal corresponding to each uplink data stream in the downlink reference signal resource according to the preset rule.
  • the terminal device may also determine downlink reference signal resources according to the downlink control information.
  • the ID related to the downlink reference signal such as the ID of the channel state information (CSI) measurement, the ID of the channel measurement resource configuration, etc.
  • the ID related to the downlink reference signal can be indicated in the downlink control information at the same time, so that the terminal device can receive
  • the resource of the downlink reference signal to be received can be determined by the ID information included in the downlink control information.
  • the downlink reference signal resource may also be determined at the time-frequency resource position related to the downlink control information.
  • the downlink reference signal resource can be determined in the time slot in which the terminal device receives downlink control information, or the next time slot of the time slot where the downlink control information is received, or in a certain designated time slot, wherein the downlink control information can indicate the downlink reference signal resource.
  • the terminal device may determine the downlink reference signal corresponding to the uplink data stream in the downlink reference signal resource.
  • the terminal device may also determine the downlink reference signal resource through other methods, for example, but not limited to, the downlink reference signal resource may be the downlink reference signal resource preconfigured by RRC signaling, and the like.
  • the terminal device determines a plurality of downlink reference signals corresponding to each upstream data stream in the at least one upstream data stream according to the number of repetitions, the number of upstream data streams, and a preset rule.
  • the network device may determine the downlink reference signal port corresponding to each uplink data stream according to the number of uplink data streams, preset rules and repetition times, and send the downlink reference signal corresponding to the corresponding uplink data stream on the corresponding port.
  • the terminal device can accordingly receive the downlink reference signal corresponding to the corresponding uplink data stream on the corresponding port according to the number of repetitions, the number of uplink data streams and the preset rule.
  • the number of repetitions is used to indicate the number of downlink reference signals corresponding to each upstream data stream, and the downlink reference signal corresponding to each upstream data stream is used to determine the precoding vector corresponding to the upstream data stream, and the precoding vector is used to The upstream data stream is precoded.
  • the specific preset rule may be the first preset rule or the second preset rule described above, or may be other preset rules that do not have certain rules.
  • there are multiple upstream data streams there may be only one upstream data stream corresponding to multiple downlink reference signals in the preset rule, for example, in data stream #1, data stream #2, and data stream #3, only data stream #1 corresponds to 2 Downlink reference signal; there may also be multiple upstream data streams corresponding to multiple downlink reference signals, for example, data stream #1, data stream #2, data stream #1 and data stream #2 in data stream #3 each correspond to 2 downlink reference signals Signal, data stream #3 corresponds to only one downlink reference signal; it is also possible that each upstream data stream corresponds to multiple downlink reference signals, for example, data stream #1, data stream #2, and data stream #3 all correspond to 2 downlink reference signals Signal.
  • the number of the multiple downlink reference signals corresponding to the multiple upstream data streams may also be different, for example, the data stream #1 may correspond to two downlink reference signals, and the data stream #2 may correspond to three downlink reference signals.
  • the preset rule is used to determine the corresponding relationship between the upstream data stream and the downlink reference signal in combination with the number of upstream data streams.
  • the port configured by the network device at this time is used as an example.
  • the number is 4.
  • the network device sends beamformed CSI-RS on the first and third CSI-RS ports, so that the equivalent channel obtained by the downlink reference signal received by the terminal device on these two ports after channel estimation can be Used to determine the upstream precoding vector for the first upstream data stream. It should be understood that the channels of the first and third CSI-RS ports are different, so the precoding vector of the beamforming CSI-RS sent by the actual network device may be different.
  • the network device sends beamforming CSI-RS on the second and fourth CSI-RS ports, so that the equivalent channel obtained by the downlink reference signal received by the terminal device on these two ports after channel estimation can be used to determine the upstream precoding vector of the second upstream data stream.
  • the number of ports configured by the network device is 8 at this time.
  • the network device sends beamforming CSI-RS on the first and second CSI-RS ports, so that the equivalent channel obtained by the downlink reference signal received by the terminal device on these two ports after channel estimation can be used to determine The upstream precoding vector for the first upstream data stream.
  • the network device sends beamforming CSI-RS on the third and fourth CSI-RS ports, so that the equivalent channel obtained by the downlink reference signal received by the terminal device on these two ports after channel estimation can be used Determine the uplink precoding vector of the second upstream data stream; send beamforming CSI-RS on the fifth and sixth CSI-RS ports, so that the downlink reference signals received by the terminal equipment on these two ports pass through
  • the equivalent channel obtained after channel estimation can be used to determine the upstream precoding vector of the third upstream data stream. It should be understood that the channels of different CSI-RS ports are different, so even if the downlink reference signal of the same upstream data stream is sent, the precoding vector of the beamforming CSI-RS actually sent by the network device on different ports may be different.
  • the terminal device obtains 2 upstream data streams, and the number of repetitions is 2, and sends the downlink reference signal according to the first preset rule. Numbering the upstream data flow as data flow #1 and data flow #2, it can be determined that data flow #1 corresponds to the first and third ports, and data flow #2 corresponds to the second and fourth ports. That is, the terminal device receives the downlink reference signal of the data stream #1 at the first and third ports, and receives the downlink reference signal of the data stream #2 at the second and fourth ports.
  • the number of upstream data streams acquired by the terminal device is 3, the number of repetitions is 2, and the downlink reference signal is sent according to the second preset rule.
  • Numbering the upstream data streams as data stream #1, data stream #2, and data stream #3 it can be determined that data stream #1 corresponds to the first and second ports, and data stream #2 corresponds to the third and fourth ports port, data flow #3 corresponds to the fifth and sixth ports. That is, the terminal device receives the downlink reference signal of data stream #1 on the first and second ports, receives the downlink reference signal of data stream #2 on the third and fourth ports, and receives the downlink reference signal of data stream #2 on the fifth and sixth ports.
  • the port receives the downlink reference signal of data stream #3.
  • the terminal device determines the downlink reference signal corresponding to each of the multiple uplink data streams according to the number of uplink data streams, the preset rule and the repetition times. In this way, the terminal device can determine the precoding vector corresponding to the upstream data stream according to the downlink reference signal, so as to perform precoding on the upstream data stream.
  • the multiple downlink reference signals corresponding to each uplink data stream can be processed so that multiple The noise and interference between the downlink reference signals can cancel each other to a certain extent, thereby improving the signal-to-noise ratio of the downlink reference signal received by the terminal device, which can further solve the problem that the signal received by the terminal device is interfered by noise and cannot be decoded.
  • the required information leads to the problem that the upstream precoding vector corresponding to the upstream data stream cannot be obtained, thereby improving the accuracy of the upstream precoding matrix and the robustness of the upstream transmission.
  • FIG. 4 is a schematic block diagram of an apparatus for precoding provided by an embodiment of the present application.
  • the communication apparatus 400 may include a transceiver unit 401 and a determination unit 402 , and optionally, the communication apparatus 400 may further include a processing unit 403 .
  • the communication apparatus 400 may correspond to the terminal device in the above method embodiments, for example, may be a terminal device, or a chip configured in the terminal device.
  • the transceiver unit 401 may be configured to receive multiple precoded downlink reference signals, and the determination unit 402 may be configured to measure the multiple downlink reference signals to determine the uplink precoding vector corresponding to the uplink data stream.
  • the determining unit 402 is specifically configured to measure each downlink reference signal in the plurality of downlink reference signals, determine an uplink precoding vector corresponding to each downlink reference signal, and determine the uplink precoding vector corresponding to each downlink reference signal according to the uplink Precoding vector, which determines the uplink precoding vector.
  • the determining unit 402 is specifically configured to measure each downlink reference signal to obtain an equivalent downlink channel matrix corresponding to each downlink reference signal, and according to the equivalent downlink channel matrix corresponding to each downlink reference signal, Determine the uplink precoding vector corresponding to each downlink reference signal.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is an average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream is the multiple downlink reference signals The sum of the downlink precoding vectors corresponding to the signal.
  • the apparatus further includes: a processing unit 403, where the processing unit 403 is configured to precode the upstream data stream based on the upstream precoding vector.
  • the processing unit 403 is specifically configured to process the uplink precoding vector, and precode the uplink data stream according to the processed uplink precoding vector.
  • processing unit 403 is specifically configured to precode the upstream data stream by using the upstream precoding vector.
  • each downlink reference signal in the plurality of downlink reference signals is precoded by a downlink precoding vector, and the downlink precoding vector is determined by measuring the uplink reference signal.
  • the communication apparatus 400 may correspond to the terminal device in the above method embodiments, for example, may be a terminal device, or a chip configured in the terminal device.
  • the transceiver unit 401 is configured to receive downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, where the number of repetitions is used to indicate the number of downlink reference signals corresponding to each upstream data stream, wherein each The downlink reference signal corresponding to each upstream data stream is used to determine a precoding vector corresponding to the upstream data stream, and the precoding vector is used to precode the upstream data stream.
  • the determining unit 402 is configured to determine, in the downlink reference signal resource, a plurality of downlink reference signals corresponding to each uplink data stream in the at least one uplink data stream according to the number of repetitions, the number of uplink data streams and a preset rule.
  • FIG. 5 is a schematic block diagram of another apparatus for precoding provided by an embodiment of the present application.
  • the communication apparatus 500 may include a processing unit 501 and a transceiver unit 502 .
  • the communication apparatus 500 may correspond to the network device in the above method embodiment.
  • the processing unit 501 is configured to perform precoding on multiple downlink reference signals; the transceiver unit 502 is configured to send the multiple downlink reference signals after precoding, wherein the measurement results of the multiple downlink reference signals after precoding Used to determine the upstream precoding vector corresponding to the upstream data stream.
  • the uplink precoding vector is determined according to the uplink precoding vectors corresponding to the multiple downlink reference signals, and each uplink precoding vector is the result of performing a calculation on each of the multiple downlink reference signals. Measurement is determined.
  • the uplink precoding vector corresponding to each downlink reference signal is determined according to the equivalent downlink channel matrix corresponding to each downlink reference signal, and the equivalent downlink channel matrix corresponding to each downlink reference signal is obtained by measuring downlink reference signals.
  • the uplink precoding vector corresponding to the downlink reference signal is equal to the equivalent downlink channel matrix or the normalized equivalent downlink channel matrix.
  • the uplink precoding vector corresponding to the uplink data stream is an average value of the uplink precoding vectors corresponding to the multiple downlink reference signals, or the uplink precoding vector corresponding to the uplink data stream is the multiple downlink reference signals The sum of the downlink precoding vectors corresponding to the signal.
  • the communication apparatus 500 may correspond to the network device in the above method embodiment.
  • the processing unit 501 is configured to generate downlink control information, where the downlink control information is used to indicate the number of repetitions and the number of upstream data streams, where the number of repetitions is used to indicate the number of downlink reference signals corresponding to each upstream data stream, wherein , the downlink reference signal corresponding to each upstream data stream is used to determine the precoding vector corresponding to the upstream data stream, the precoding vector is used to precode the upstream data stream, and the downlink reference signal corresponding to each upstream data stream It is determined according to the number of repetitions, the number of upstream data streams and the preset rule.
  • the transceiver unit 502 is configured to send the downlink control information.
  • FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device 2000 can be applied to the system as shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiments.
  • the terminal device 2000 includes a processor 2010 and a transceiver 2020 .
  • the terminal device 2000 further includes a memory 2030 .
  • the processor 2010, the transceiver 2002 and the memory 2030 can communicate with each other through an internal connection path to transmit control and/or data signals.
  • the computer program is called and executed to control the transceiver 2020 to send and receive signals.
  • the terminal device 2000 may further include an antenna 2040 for sending the uplink data or uplink control signaling output by the transceiver 2020 through wireless signals.
  • the above-mentioned processor 2010 and the memory 2030 can be combined into a processing device, and the processor 2010 is configured to execute the program codes stored in the memory 2030 to realize the above-mentioned functions.
  • the memory 2030 may also be integrated in the processor 2010 or independent of the processor 2010 .
  • the processor 2010 may correspond to the processing unit 403 and/or the determination unit 402 in FIG. 4 .
  • the transceiver 2020 described above may correspond to the transceiver unit 401 in FIG. 4 , and may also be referred to as a communication unit.
  • the transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used for receiving signals, and the transmitter is used for transmitting signals.
  • the terminal device 2000 shown in FIG. 6 can implement various processes related to the terminal device in the method embodiments shown in FIG. 2 to FIG. 3 .
  • the operations and/or functions of each module in the terminal device 2000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 2010 may be used to perform the actions described in the foregoing method embodiments that are implemented inside the terminal device, and the transceiver 2020 may be used to perform the actions described in the foregoing method embodiments that the terminal device sends to or receives from the network device. action.
  • the transceiver 2020 may be used to perform the actions described in the foregoing method embodiments that the terminal device sends to or receives from the network device. action.
  • the above terminal device 2000 may further include a power supply 2050 for providing power to various devices or circuits in the terminal device.
  • the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, etc., the audio circuit Speakers 2082, microphones 2084, etc. may also be included.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application, which may be, for example, a schematic structural diagram of a base station.
  • the base station 3000 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiments.
  • the base station 3000 may include one or more radio frequency units, such as a remote radio unit (RRU) 3100 and one or more baseband units (BBU) (also referred to as digital units) , digital unit, DU)3200.
  • the RRU 3100 may be called a transceiver unit, which corresponds to the transceiver unit 502 in FIG. 5 .
  • the transceiver unit 3100 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 3101 and a radio frequency unit 3102 .
  • the transceiver unit 3100 may include a receiving unit and a sending unit, the receiving unit may correspond to a receiver (or called a receiver, a receiving circuit), and the sending unit may correspond to a transmitter (or called a transmitter, a sending circuit).
  • the part of the RRU 3100 is mainly used for sending and receiving radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending indication information to terminal equipment.
  • the part of the BBU 3200 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 3100 and the BBU 3200 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 3200 is the control center of the base station, and can also be referred to as a processing unit, which can correspond to the processing unit 501 in FIG. 5 , and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum.
  • the BBU processing unit
  • the BBU may be used to control the base station to perform the operation procedure of the network device in the foregoing method embodiments, for example, to generate the foregoing indication information and the like.
  • the BBU 3200 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards.
  • Wireless access network (such as LTE network, 5G network or other network).
  • the BBU 3200 also includes a memory 3201 and a processor 3202.
  • the memory 3201 is used to store necessary instructions and data.
  • the processor 3202 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments.
  • the memory 3201 and processor 3202 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the base station 3000 shown in FIG. 7 can implement various processes involving network devices in the method embodiments of FIGS. 2 to 3 .
  • the operations and/or functions of each module in the base station 3000 are respectively to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned BBU 3200 may be used to perform the actions described in the foregoing method embodiments that are implemented internally by the network device, while the RRU 3100 may be used to perform the actions described in the foregoing method embodiments that the network device sends to or receives from the terminal device.
  • the RRU 3100 may be used to perform the actions described in the foregoing method embodiments that the network device sends to or receives from the terminal device.
  • An embodiment of the present application further provides a processing apparatus, including a processor and an interface, where the processor is configured to execute the communication method in any of the foregoing method embodiments.
  • the above processing device may be a chip.
  • the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a It is a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • MCU microcontroller unit
  • MCU programmable logic device
  • PLD programmable logic device
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • the steps of the above method embodiments may be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on a computer, the computer is made to execute the steps shown in FIGS. 2 to 3 .
  • the present application further provides a computer-readable medium, where the computer-readable medium stores program codes, when the program codes are executed on a computer, the computer is made to execute the programs shown in FIGS. 2 to 3 .
  • the present application further provides a system, which includes the aforementioned one or more terminal devices and one or more network devices.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state discs, SSD)) etc.
  • the network equipment in each of the above apparatus embodiments completely corresponds to the terminal equipment and the network equipment or terminal equipment in the method embodiments, and corresponding steps are performed by corresponding modules or units.
  • a processing unit processor
  • processor For functions of specific units, reference may be made to corresponding method embodiments.
  • the number of processors may be one or more.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

本申请提供了一种进行预编码的方法和装置，可以提高上行预编码矩阵的精度。该方法包括：接收经过预编码的多个下行参考信号（201），对该多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量（203）。本申请可以通过对多个下行参考信号进行测量和处理，使得终端设备可以根据测量结果较为精确地获得上行数据流对应的上行预编码向量，提高上行预编码向量的精度，由此可以减小多用户之间的信号干扰，有利于提高信号质量。

Description

一种进行预编码的方法和装置 技术领域
本申请涉及无线通信领域，更具体地，涉及一种进行预编码的方法和装置。
背景技术
在大规模多输入多输出(massive multiple-input multiple-output，Massive MIMO)技术中，可通过预编码减小多用户之间的干扰以及同一用户的多个信号流之间的干扰，有利于提高信号质量，实现空分复用，提高频谱利用率。
在目前的通信系统中，基站根据用户设备(user equipment，UE)发送的信道探测参考信号(Sounding Reference Signal，SRS)对上行信道进行信道估计，并计算UE的上行预编码矩阵，通过下行控制信息(downlink control information，DCI)向UE指示码本中的索引，使得UE可以根据上行预编码矩阵进行上行预编码。
然而，上述方式无法对上行预编码矩阵进行精确指示，导致UE接收到的信号干扰较大，因此，如何提高上行预编码矩阵的精度仍然是一个需要解决的问题。
发明内容
本申请提供一种进行预编码的方法和装置，可以提高上行预编码矩阵的指示精度。
第一方面，提供了一种进行预编码的方法，该方法包括：接收经过预编码的多个下行参考信号；对该多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
终端设备可以通过对多个下行参考信号进行测量，使终端设备可以根据测量结果较为精确地获得上行数据流对应的上行预编码向量，提高上行预编码向量的精度，由此可以减小多用户之间的信号干扰，有利于提高信号质量。
结合第一方面，在第一方面的某些实现方式中，对该多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量，具体包括：对该多个下行参考信号中的每个下行参考信号进行测量，确定每个下行参考信号对应的上行预编码向量；根据多个下行参考信号对应的上行预编码向量，确定该上行预编码向量。
结合第一方面，在第一方面的某些实现方式中，对该多个下行参考信号中的每个下行参考信号进行测量，确定每个下行参考信号对应的上行预编码向量，具体包括：对每个下行参考信号进行测量，获得每个下行参考信号对应的等效下行信道矩阵；根据每个下行参考信号对应的等效下行信道矩阵，确定每个下行参考信号对应的上行预编码向量。
结合第一方面，在第一方面的某些实现方式中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
结合第一方面，在第一方面的某些实现方式中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：基于该上行预编码向量对该上行数据流进行预编码。
结合第一方面，在第一方面的某些实现方式中，该基于该上行预编码向量对该上行数据流进行预编码，具体包括：对该上行预编码向量进行处理；根据处理后的该上行预编码向量对该上行数据流进行预编码。
结合第一方面，在第一方面的某些实现方式中，该基于该上行预编码向量对该上行数据流进行预编码，具体包括，使用该上行预编码向量对该上行数据流进行预编码。
结合第一方面，在第一方面的某些实现方式中，该多个下行参考信号中的每个下行参考信号由一个下行预编码向量进行预编码，该下行预编码向量是通过对上行参考信号进行测量确定的。
终端设备可以通过对多个下行参考信号进行测量，使终端设备可以根据测量结果较为精确地获得上行数据流对应的上行预编码向量，提高上行预编码向量的精度，由此可以减小多用户之间的信号干扰，有利于提高信号质量。例如，当终端设备接收到的下行参考信号信噪比较低时，可以通过对多个下行参考信号进行处理，将多个下行参考信号对应的上行预编码向量处理为一个上行数据流对应的上行预编码向量，使得上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而能够提高终端设备接收到的下行参考信号的信噪比，由此可以进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第二方面，提供了一种进行预编码的方法，该方法包括：接收下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量，其中该重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码；根据该重复次数、该上行数据流的数量和预设规则，确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
终端设备根据上行数据流的数量、预设规则和重复次数确定多个上行数据流中每一个上行数据流对应的下行参考信号。如此一来，终端设备便可根据该下行参考信号，确定上行数据流对应的预编码向量，以便对上行数据流进行预编码。在这种情况下，当终端设备接收到的下行参考信号信噪比较低时，可以通过对每个上行数据流对应的多个下行参考信号进行处理，使得每个上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第三方面，提供了一种进行预编码的方法，该方法包括：终端设备确定目标数据流关联的至少两个端口的下行参考信号；该终端设备根据该至少两个端口的下行参考信号确定该目标数据流的上行预编码向量。
结合第三方面，在第三方面的某些实现方式中，该终端设备确定目标数据流关联的至少两个端口的下行参考信号，包括：该终端设备接收多个数据流关联的多个端口的下行参 考信号，该多个数据流包括该目标数据流；该终端设备在该多个数据流关联的多个端口的下行参考信号中确定该目标数据流关联的该至少两个端口的下行参考信号。
结合第三方面，在第三方面的某些实现方式中，该终端设备确定目标数据流关联的该至少两个端口的下行参考信号，包括：该终端设备获取多个数据流的秩数，该多个数据流的秩数用于指示该多个数据流的数量；该终端设备获取重复次数，该重复次数用于指示该多个数据流中的每一个数据流重复的次数；该终端设备获取重复模式，该重复模式包括该多个数据流中的每一个数据流与该每一个数据流对应的下行参考信号的端口的关联关系；该终端设备根据该多个数据流的秩数、该重复模式和该重复次数确定该目标数据流关联的至少两个端口的下行参考信号。
结合第三方面，在第三方面的某些实现方式中，该终端设备根据该多个数据流的秩数、该重复模式和该重复次数确定该目标数据流关联的至少两个端口的下行参考信号，包括：该终端设备根据该多个数据流的秩数和该重复模式确定该目标数据流与该端口的对应关系；该终端设备根据该对应关系和该重复次数确定该目标数据流对应的端口；该终端设备在该目标数据流关联的端口上接收该目标数据流的下行参考信号，该下行参考信号的个数与该重复次数相同。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取重复模式，包括：该终端设备接收指示信息，该指示信息包括该重复模式。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取重复模式，包括：该终端设备根据预配置信息获取该重复模式。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取多个数据流的秩数，包括：该终端设备接收第一下行控制信息DCI，该第一DCI包括该多个数据流的秩数。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取重复次数，包括：该终端设备接收第二DCI，该第二DCI包括该重复次数。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取重复次数，包括：该终端设备获取该端口的数量；该终端设备根据该端口的数量和该多个数据流的秩数确定该重复次数。
结合第三方面，在第三方面的某些实现方式中，该终端设备根据该端口的数量和该多个数据流的秩数确定该重复次数，包括：该终端设备通过该端口的数量和该多个数据流的秩数相除并向下取整确定该重复次数。
结合第三方面，在第三方面的某些实现方式中，该终端设备获取该端口的数量，包括：该终端设备接收信令消息，该信令消息包括该端口的数量。
结合第三方面，在第三方面的某些实现方式中，该下行参考信号包括信道状态信息参考信号CSI-RS。
终端设备根据上行数据流的数量、预设规则和重复次数确定多个上行数据流中每一个上行数据流对应的下行参考信号。如此一来，终端设备便可根据该下行参考信号，确定上行数据流对应的预编码向量，以便对上行数据流进行预编码。在这种情况下，当终端设备接收到的下行参考信号信噪比较低时，可以通过对每个上行数据流对应的多个下行参考信号进行处理，使得每个上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解 决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第四方面，提供了一种进行预编码的方法，该方法包括：对多个下行参考信号进行预编码；发送预编码后的该多个下行参考信号，其中，预编码后的该多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。
结合第四方面，在第四方面的某些实现方式中，该上行预编码向量是根据该多个下行参考信号对应的上行预编码向量确定的，每个上行预编码向量是对该多个下行参考信号中的每个下行参考信号进行测量确定的。
结合第四方面，在第四方面的某些实现方式中，每个下行参考信号对应的上行预编码向量是根据该每个下行参考信号对应的等效下行信道矩阵确定的，每个下行参考信号对应的等效下行信道矩阵是对该每个下行参考信号进行测量获得的。
结合第四方面，在第四方面的某些实现方式中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
结合第四方面，在第四方面的某些实现方式中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
网络设备通过对同一个数据流的多个下行参考信号分别进行预编码，可以便于终端设备根据多个下行参考信号的测量结果，较为精确地获得上行数据流对应的上行预编码向量，提高上行预编码向量的精度，由此可以减小多用户之间的信号干扰，有利于提高信号质量。例如，可以在终端设备接收到的下行参考信号的信噪比较低时，便于终端设备对多个下行参考信号进行处理，将多个下行参考信号对应的上行预编码向量处理为一个上行数据流对应的上行预编码向量，使得上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消。进而能够提高接收到的下行参考信号的信噪比，由此可以进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第五方面，提供了一种进行预编码的方法，该方法包括：生成下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量，其中该重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，该每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码，每个上行数据流对应的下行参考信号是根据该重复次数、该上行数据流的数量和预设规则确定的；发送该下行控制信息。
网络设备通过下行控制信息向终端设备指示重复次数和上行数据流的数量，使得终端设备可以根据上行数据流的数量、预设规则和重复次数确定多个上行数据流中每一个上行数据流对应的下行参考信号。如此一来，可以便于终端设备根据该下行参考信号，确定上行数据流对应的预编码向量，以便对上行数据流进行预编码。在这种情况下，当终端设备接收到的下行参考信号信噪比较低的情况下，可以通过对每个上行数据流对应的多个下行参考信号进行处理，使得每个上行数据流对应的多个下行参考信号之间的噪声和干扰在一 定程度上能够相互抵消，进而提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第六方面，提供了一种进行预编码的方法，该方法包括：网络设备发送目标数据流关联的至少两个端口的下行参考信号，该至少两个端口的下行参考信号用于确定该目标数据流的上行预编码向量。
结合第六方面，在第六方面的某些实现方式中，该网络设备发送目标数据流关联的至少两个端口的下行参考信号，包括：该网络设备发送多个数据流关联的多个端口的下行参考信号，该多个数据流包括该目标数据流，该多个数据流关联的多个端口的下行参考信号包括该目标数据流关联的该至少两个端口的下行参考信号。
结合第六方面，在第六方面的某些实现方式中，该网络设备发送目标数据流关联的至少两个端口的下行参考信号，包括：该网络设备根据多个数据流的秩数、重复模式和重复次数发送该目标数据流关联的至少两个端口的下行参考信号。
结合第六方面，在第六方面的某些实现方式中，该网络设备根据多个数据流的秩数、重复模式和重复次数发送该目标数据流关联的该至少两个端口的下行参考信号，包括：该网络设备根据该多个数据流的秩数和该重复模式确定该目标数据流与该端口的对应关系；该网络设备根据该对应关系和该重复次数确定该目标数据流对应的端口；该网络设备在该目标数据流关联的端口上发送该目标数据流的下行参考信号，该下行参考信号的个数与该重复次数相同。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该网络设备发送指示信息，该指示信息包括该重复模式。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该网络设备根据预配置信息获取该重复模式。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该网络设备发送第一DCI，该第一DCI包括该多个数据流的秩数。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该网络设备发送第二DCI，该第二DCI包括该重复次数。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该网络设备发送该端口的数量，该端口的数量用于确定该重复次数。
结合第六方面，在第六方面的某些实现方式中，该网络设备发送该端口的数量，包括：该网络设备发送信令消息，该信令消息包括该端口的数量。
结合第六方面，在第六方面的某些实现方式中，该下行参考信号包括CSI-RS。
网络设备通过在与上行数据流关联的端口上发送该上行数据流对应的多个下行参考信号，并在DCI中将关联的信息发送给终端设备，以便于终端设备根据上行数据流的数量、预设规则和重复次数确定多个上行数据流中每一个上行数据流对应的下行参考信号。如此一来，终端设备便可根据该下行参考信号，确定上行数据流对应的预编码向量，以便对上行数据流进行预编码。在这种情况下，当终端设备接收到的下行参考信号信噪比较低时，可以通过对每个上行数据流对应的多个下行参考信号进行处理，使得每个上行数据流对应 的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
第七方面，提供了一种进行预编码的装置，该装置包括：收发单元，该收发单元用于接收经过预编码的多个下行参考信号；确定单元，该确定单元用于对该多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
结合第七方面，在第七方面的某些实现方式中，该确定单元用于对该多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量，具体包括：该确定单元用于对该多个下行参考信号中的每个下行参考信号进行测量，确定每个下行参考信号对应的上行预编码向量，根据多个下行参考信号对应的上行预编码向量，确定该上行预编码向量。
结合第七方面，在第七方面的某些实现方式中，该确定单元用于对该多个下行参考信号中的每个下行参考信号进行测量，确定该每个下行参考信号对应的上行预编码向量，具体包括：该确定单元用于对每个下行参考信号进行测量，获得每个下行参考信号对应的等效下行信道矩阵，根据每个下行参考信号对应的等效下行信道矩阵，确定每个下行参考信号对应的上行预编码向量。
结合第七方面，在第七方面的某些实现方式中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
结合第七方面，在第七方面的某些实现方式中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：处理单元，该处理单元用于基于该上行预编码向量对该上行数据流进行预编码。
结合第七方面，在第七方面的某些实现方式中，该处理单元用于基于该上行预编码向量对该上行数据流进行预编码，具体包括：该处理单元用于对该上行预编码向量进行处理，根据处理后的该上行预编码向量对该上行数据流进行预编码。
结合第七方面，在第七方面的某些实现方式中，该处理单元用于基于该上行预编码向量对该上行数据流进行预编码，具体包括：该处理单元具体用于使用该上行预编码向量对该上行数据流进行预编码。
结合第七方面，在第七方面的某些实现方式中，该多个下行参考信号中的每个下行参考信号由一个下行预编码向量进行预编码，该下行预编码向量是通过对上行参考信号进行测量确定的。
第八方面，提供了一种进行预编码的装置，该装置包括：收发单元，该收发单元用于接收下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量，其中该重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码；确定单元，该处理单元用于根据该重复次数、该上行数据流的数量和预设规则，确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
第九方面，提供了一种进行预编码的装置，该装置包括：通信单元，该通信单元用于 确定目标数据流关联的至少两个端口的下行参考信号；处理单元，该处理单元用于根据该至少两个端口的下行参考信号确定该目标数据流的上行预编码向量。
结合第九方面，在第九方面的某些实现方式中，该通信单元用于确定目标数据流关联的至少两个端口的下行参考信号，包括：该通信单元用于接收多个数据流关联的多个端口的下行参考信号，该多个数据流包括该目标数据流；该通信单元还用于在该多个数据流关联的多个端口的下行参考信号中确定该目标数据流关联的该至少两个端口的下行参考信号。
结合第九方面，在第九方面的某些实现方式中，该通信单元用于确定目标数据流关联的至少两个端口的下行参考信号，包括：该通信单元用于获取多个数据流的秩数，该多个数据流的秩数用于指示该多个数据流的数量；该通信单元还用于获取重复次数，该重复次数用于指示该多个数据流中的每一个数据流重复的次数；该通信单元还用于获取重复模式，该重复模式包括该多个数据流中的每一个数据流与该每一个数据流对应的下行参考信号的端口的关联关系；该通信单元还用于根据该多个数据流的秩数、该重复模式和该重复次数确定该目标数据流关联的至少两个端口的下行参考信号。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于根据该多个数据流的秩数、该重复模式和该重复次数确定该目标数据流关联的至少两个端口的下行参考信号，包括：该通信单元还用于根据该多个数据流的秩数和该重复模式确定该目标数据流与该端口的对应关系；该通信单元还用于根据该对应关系和该重复次数确定该目标数据流对应的端口；该通信单元还用于在该目标数据流关联的端口上接收该目标数据流的下行参考信号，该下行参考信号的个数与该重复次数相同。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于获取重复模式，包括：该通信单元还用于接收指示信息，该指示信息包括该重复模式。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于获取重复模式，包括：该通信单元还用于根据预配置信息获取该重复模式。
结合第九方面，在第九方面的某些实现方式中，该通信单元用于获取多个数据流的秩数，包括：该通信单元用于接收第一下行控制信息DCI，该第一DCI包括该多个数据流的秩数。
结合第九方面，在第九方面的某些实现方式中，该终端设备获取重复次数，包括：该终端设备接收第二DCI，该第二DCI包括该重复次数。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于获取重复次数，包括：该通信单元还用于获取该端口的数量；该通信单元还用于根据该端口的数量和该多个数据流的秩数确定该重复次数。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于根据该端口的数量和该多个数据流的秩数确定该重复次数，包括：该通信单元还用于通过该端口的数量和该多个数据流的秩数相除并向下取整确定该重复次数。
结合第九方面，在第九方面的某些实现方式中，该通信单元还用于获取该端口的数量，包括：该通信单元还用于接收信令消息，该信令消息包括该端口的数量。
结合第九方面，在第九方面的某些实现方式中，该下行参考信号包括CSI-RS。
第十方面，提供了一种进行预编码的装置，该装置包括：处理单元，该处理单元用于 对多个下行参考信号进行预编码；收发单元，该收发单元用于发送预编码后的该多个下行参考信号，其中，预编码后的该多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。
结合第十方面，在第十方面的某些实现方式中，该上行预编码向量是根据该多个下行参考信号对应的上行预编码向量确定的，每个上行预编码向量是对该多个下行参考信号中的每个下行参考信号进行测量确定的。
结合第十方面，在第十方面的某些实现方式中，每个下行参考信号对应的上行预编码向量是根据每个下行参考信号对应的等效下行信道矩阵确定的，每个下行参考信号对应的等效下行信道矩阵是对每个下行参考信号进行测量获得的。
结合第十方面，在第十方面的某些实现方式中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
结合第十方面，在第十方面的某些实现方式中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
第十一方面，提供了一种进行预编码的装置，该装置包括：处理单元，该处理单元用于生成下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量，其中该重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，该每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码，每个上行数据流对应的下行参考信号是根据该重复次数、该上行数据流的数量和预设规则确定的；收发单元，该收发单元用于发送该下行控制信息。
第十二方面，提供了一种进行预编码的装置，该装置包括：发送单元，该发送单元用于发送目标数据流关联的至少两个端口的下行参考信号，该至少两个端口的下行参考信号用于确定该目标数据流的上行预编码向量。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元用于发送目标数据流关联的至少两个端口的下行参考信号，包括：该发送单元用于发送多个数据流关联的多个端口的下行参考信号，该多个数据流包括该目标数据流，该多个数据流关联的多个端口的下行参考信号包括该目标数据流关联的该至少两个端口的下行参考信号。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元用于发送目标数据流关联的至少两个端口的下行参考信号，包括：该发送单元用于根据多个数据流的秩数、重复模式和重复次数发送该目标数据流关联的至少两个端口的下行参考信号。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元用于根据多个数据流的秩数、重复模式和重复次数发送该目标数据流关联的该至少两个端口的下行参考信号，包括：该发送单元用于根据该多个数据流的秩数和该重复模式确定该目标数据流与该端口的对应关系；该发送单元还用于根据该对应关系和该重复次数确定该目标数据流对应的端口；该发送单元还用于在该目标数据流关联的端口上发送该目标数据流的下行参考信号，该下行参考信号的个数与该重复次数相同。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于发送指示信息，该指示信息包括该重复模式。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于根据预配置信 息获取该重复模式。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于发送第一DCI，该第一DCI包括该多个数据流的秩数。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于发送第二DCI，该第二DCI包括该重复次数。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于发送该端口的数量，该端口的数量用于确定该重复次数。
结合第十二方面，在第十二方面的某些实现方式中，该发送单元还用于发送该端口的数量，包括：该发送单元还用于发送信令消息，该信令消息包括该端口的数量。
结合第十二方面，在第十二方面的某些实现方式中，该下行参考信号包括CSI-RS。
第十三方面，提供了一种通信装置，该通信装置包括：存储器，该存储器用于存储计算机程序；处理器，该处理器用于执行该存储器中存储的部分或全部该计算机程序，以使得该设备执行如第一方面至第三方面中任一项所述的方法，或者执行如第四方面至第六方面中任一项所述的方法。
第十四方面，提供了一种计算机可读存储介质，其特征在于，包括计算机程序，当部分或全部该计算机程序在计算机上运行时，使得该计算机执行如第一方面至第三方面中任一项所述的方法，或者执行如第四方面至第六方面中任一项所述的方法。
第十五方面，提供了一种计算机程序产品，包括计算机程序，当该计算机程序在计算机上运行时，使得该计算机执行如第一方面至第三方面中任一项所述的方法，或者，使得计算机执行如第四方面至第六方面中任一项所述的方法。
第十六方面，提供了一种通信系统，包括如第七方面至第九方面中任一项所述的通信装置，以及如第十方面至第十二方面中任一项所述的通信装置。
附图说明
图1是本申请实施例适用的一种系统架构的示意图。
图2是本申请实施例提供的一种进行预编码的方法的示意性流程图。
图3是本申请实施例提供的另一种进行预编码的方法的示意性流程图。
图4是本申请实施例提供的一种进行预编码的装置的示意性流程图。
图5是本申请实施例提供的另一种进行预编码的装置的示意性框图。
图6是本申请实施例提供的一种终端设备的结构示意图。
图7是本申请实施例提供的一种网络设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(Long Term Evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th Generation，5G)移动通信系统或新无线接入技术(new  radio Access Technology，NR)或者下一代通信系统，比如6G。其中，5G移动通信系统可以是非独立组网(non-standalone，NSA)或独立组网(standalone，SA)。
本申请提供的技术方案还可以应用于机器类通信(machine type communication，MTC)、机器间通信长期演进技术(Long Term Evolution-machine，LTE-M)、设备到设备(device-to device，D2D)网络、机器到机器(machine to machine，M2M)网络、物联网(internet of things，IoT)网络或者其他网络。其中，IoT网络例如可以包括车联网。其中，车联网系统中的通信方式统称为车到其他设备(vehicle to X，V2X，X可以代表任何事物)，例如，该V2X可以包括：车辆到车辆(vehicle to vehicle，V2V)通信，车辆与基础设施(vehicle to infrastructure，V2I)通信、车辆与行人之间的通信(vehicle to pedestrian，V2P)或车辆与网络(vehicle to network，V2N)通信等。
本申请提供的技术方案还可以应用于未来的通信系统，如第六代(6th Generation，6G)移动通信系统等。本申请对此不作限定。
本申请实施例中，网络设备可以是任意一种具有无线收发功能的设备。该设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WiFi)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)，或者下一代通信6G系统中的基站等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、介质接入控制(medium access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU和CU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
网络设备为小区提供服务，终端设备通过网络设备分配的传输资源(例如，频域资源，或者说，频谱资源)与小区进行通信，该小区可以属于宏基站(例如，宏eNB或宏gNB等)，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
在本申请实施例中，终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。
终端设备可以是一种向用户提供语音/数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例可以为：手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑(如笔记本电脑、掌上电脑等)、移动互联网设备(mobile internet device，MID)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。
其中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，终端设备还可以是物联网(Internet of things，IoT)系统中的终端设备。IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。IoT技术可以通过例如窄带(narrow band)NB技术，做到海量连接，深度覆盖，终端省电。
此外，终端设备还可以包括智能打印机、火车探测器、加油站等传感器，主要功能包括收集数据(部分终端设备)、接收网络设备的控制信息与下行数据，并发送电磁波，向网络设备传输上行数据。
为便于理解本申请实施例，首先结合图1详细说明适用于本申请实施例提供的方法的通信系统。
图1示出了适用于本申请实施例提供的方法的通信系统100的示意图。如图所示，该通信系统100可以包括至少一个网络设备，如图1中所示的5G系统中的网络设备101；该通信系统100还可以包括至少一个终端设备，如图1中所示的终端设备102至107。其中，该终端设备102至107可以是移动的或固定的。网络设备101和终端设备102至107中的一个或多个均可以通过无线链路通信。每个网络设备可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备通信。例如，网络设备可以向终端设备发送配置信息，终端设备可以基于该配置信息向网络设备发送上行数据；又例如，网络设备可以向终端设备发送下行数据。因此，图1中的网络设备101和终端设备102至107构成 一个通信系统。
可选地，终端设备之间可以直接通信。例如可以利用D2D技术等实现终端设备之间的直接通信。如图中所示，终端设备105与106之间、终端设备105与107之间，可以利用D2D技术直接通信。终端设备106和终端设备107可以单独或同时与终端设备105通信。
终端设备105至107也可以分别与网络设备101通信。例如可以直接与网络设备101通信，如图中的终端设备105和106可以直接与网络设备101通信；也可以间接地与网络设备101通信，如图中的终端设备107经由终端设备106与网络设备101通信。
应理解，图1示例性地示出了一个网络设备和多个终端设备，以及各通信设备之间的通信链路。可选地，该通信系统100可以包括多个网络设备，并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，例如更多或更少的终端设备。本申请对此不做限定。
上述各个通信设备，如图1中的网络设备101和终端设备102至107，可以配置多个天线。该多个天线可以包括至少一个用于发送信号的发射天线和至少一个用于接收信号的接收天线。另外，各通信设备还附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件(例如处理器、调制器、复用器、解调器、解复用器或天线等)。因此，网络设备与终端设备之间可通过多天线技术通信。
可选地，该无线通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例不限于此。
为了便于理解本申请实施例，下面简单说明下行信号在发送之前在物理层的处理过程。应理解，下文所描述的对下行信号的处理过程可以由网络设备执行，也可以由配置于网络设备中的部件(如芯片或芯片系统等)执行。为方便说明，下文统称为网络设备。
网络设备在物理信道可对码字(code word)进行处理。其中，码字可以为经过编码(例如包括信道编码)的编码比特。码字经过加扰(scrambling)，生成加扰比特。加扰比特经过调制映射(modulation mapping)，得到调制符号。调制符号经过层映射(layer mapping)，被映射到多个层(layer)，或者称传输层。经过层映射后的调制符号经过预编码(precoding)，得到预编码后的信号。预编码后的信号经过资源元素(resource element，RE)映射后，被映射到多个RE上。这些RE随后经过正交复用(orthogonal frequency division multiplexing，OFDM)调制后通过天线端口(antenna port)发射出去。
应理解，上文所描述的对下行信号的处理过程仅为示例性描述，不应对本申请构成任何限定。对下行信号的处理过程具体可以参考现有技术，为了简洁，这里省略对其具体过程的详细说明。
应理解，本申请实施例提供的方法可以应用于通过多天线技术通信的系统。例如，图1中所示的通信系统100。该通信系统可以包括至少一个网络设备和至少一个终端设备。网络设备和终端设备之间可通过多天线技术通信。
还应理解，本申请实施例提供的方法并不仅限于网络设备与终端设备之间的通信，还可应用于终端设备与终端设备之间的通信等。本申请对于该方法所应用的场景并不做限定。下文示出的实施例中，仅为便于理解和说明，以网络设备与终端设备之间的交互为例详细说明本申请实施例提供的方法。
还应理解，下文示出的实施例并未对本申请实施例提供的方法的执行主体的具体结构 特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如。本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
为便于理解本申请实施例，下面对本申请实施例中涉及到的术语做简单介绍。
1、预编码技术：发送设备(如网络设备)可以在已知信道状态的情况下，借助与信道状态相匹配的预编码矩阵来对待发送信号进行处理，使得经过预编码的待发送信号与信道相适配，从而使得接收设备(如终端设备)消除信道间影响的复杂度降低。因此，通过对待发送信号的预编码处理，接收信号质量(例如信号与干扰加噪声比(signal to interference plus noise ratio，SINR)等)得以提升。因此，采用预编码技术，可以实现发送设备与多个接收设备在相同的时频资源上传输，也就是实现了多用户多输入多输出(multiple user multiple input multiple output，MU-MIMO)。
应理解，有关预编码技术的相关描述仅为便于理解而示例，并非用于限制本申请实施例的保护范围。在具体实现过程中，发送设备还可以通过其他方式进行预编码。例如，在无法获知信道信息(例如但不限于信道矩阵)的情况下，采用预先设置的预编码矩阵或者加权处理方式进行预编码等。为了简洁，其具体内容本文不再赘述。
2、天线端口(antenna port)：简称端口。天线端口可以理解为被接收设备所识别的发射天线，或者在空间上可以区分的发射天线。每个天线端口可以与一个参考信号对应，因此，每个天线端口可以称为一个参考信号的端口，例如，信道状态信息参考信号(channel state information reference signal，CSI-RS)端口、探测参考信号(sounding reference signal，SRS)端口等。
3、预编码矩阵(precoding matrix)：终端设备可以基于信道测量确定预编码矩阵。示例性地，终端设备可以通过信道估计等方式或者基于信道互易性确定信道矩阵。预编码矩阵例如可以通过对信道矩阵或信道矩阵的协方差矩阵进行奇异值分解(singular value decomposition，SVD)的方式获得，或者，也可以通过对信道矩阵的协方差矩阵进行特征值分解(eigenvalue decopomsition，EVD)的方式获得。应理解，上文中列举的预编码矩阵的确定方式仅为示例，不应对本申请构成任何限定。预编码矩阵的确定方式可以参考现有技术，为了简洁，这里不再一一列举。
终端设备所确定的预编码矩阵可以称为待反馈的预编码矩阵，或者说，待上报的预编码矩阵。终端设备可以通过预编码矩阵指示(precoding matrix indicator，PMI)指示该待反馈的预编码矩阵，以便于网络设备基于PMI恢复出该预编码矩阵。网络设备基于该PMI恢复出的预编码矩阵可以与上述待反馈的预编码矩阵相同或相近似。
在下行信道测量中，网络设备根据PMI确定出的预编码矩阵与终端设备所确定的预编码矩阵的近似度越高，其确定出的用于数据传输的预编码矩阵也就越能够与下行信道相适配，因此也就能够提高信号的传输质量。
4、预编码向量：在本申请实施例中，预编码向量可以由预编码矩阵中的一个向量确定，如，列向量。换句话说，预编码矩阵可以包括一个或多个列向量，每个列向量可用于确定一个预编码向量。当预编码矩阵仅包括一个列向量时，该预编码矩阵也可以称为预编码向量。预编码矩阵可以是由一个或多个传输层的预编码向量确定，预编码矩阵中的每个 向量可以对应于一个传输层。
5、上行数据流的秩数(rank)：上行数据流的秩数可以是网络设备基于信道测量而反馈的秩(rank)，其中，网络设备可以根据上行参考信号对信道进行测量。在本申请实施例中，网络设备基于信道测量而反馈的秩可以等于传输层数，即上行数据流的数量。
6、CSI-RS：用于测量基站到UE之间的信道，并获取调度和链路自适应所需要的信道状态信息，如预编码矩阵、信道质量信息等。本申请实施例中涉及的下行参考信号可以包括CSI-RS。
为了便于理解本申请实施例，作出以下几点说明。
第一，在本申请实施例中，“用于指示”可以包括用于直接指示和用于间接指示。例如，当描述某一指示信息用于指示信息I时，可以包括该指示信息直接指示I或间接指示I，而并不代表该指示信息中一定携带有I。
将指示信息所指示的信息称为待指示信息，则具体实现过程中，对待指示信息进行指示的方式有很多种，例如但不限于，可以直接指示待指示信息，如待指示信息本身或者该待指示信息的索引等。也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系。还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的。例如，指示信息用于指示六个向量，因此待指示信息为六个向量，但实际上仅有五个向量是通过指示信息来指示的，另外一个向量是不需要指示的，但是在描述时，仍然可以描述成指示信息用于指示六个向量。在这种情况下，指示信息仅仅指示待指示信息(六个向量)的一部分(五个向量)，而待指示信息的其他部分(剩余的一个向量)则是已知的，或者提前约定的。又例如，指示信息用于指示每个向量的加权系数，但实际上仅有五个向量的加权系数是通过指示信息来指示的，另外一个向量的加权系数是不需要指示的，但是在描述时，仍然可以描述成指示信息用于指示每个向量的加权系数。在这种情况下，指示信息仅仅指示待指示信息(六个向量的加权系数)的一部分(五个向量的加权系数)，而待指示信息的其他部分(剩余的一个向量的加权系数)则是已知的，或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。同时，还可以识别各个信息的通用部分并统一指示，以降低单独指示同样的信息而带来的指示开销。例如，本领域的技术人员应当明白，预编码矩阵是由预编码向量组成的，预编码矩阵中的各个预编码向量，在组成或者其他属性方面，可能存在相同的部分。
此外，具体的指示方式还可以是现有各种指示方式，例如但不限于，上述指示方式及其各种组合等。各种指示方式的具体细节可以参考现有技术，本文不再赘述。由上文所述可知，举例来说，当需要指示相同类型的多个信息时，可能会出现不同信息的指示方式不相同的情形。具体实现过程中，可以根据具体的需要选择所需的指示方式，本申请实施例对选择的指示方式不做限定。如此一来，本申请实施例涉及的指示方式应理解为涵盖可以使得待指示方获知待指示信息的各种方法。
此外，待指示信息可能存在其他等价形式，例如行向量可以表现为列向量，一个矩阵可以通过该矩阵的转置矩阵来表示，一个矩阵也可以表现为向量或者数组的形式，该向量或者数组可以由该矩阵的各个行向量或者列向量相互连接而成，两个向量的克罗内克尔积也可以通过一个向量与另一个向量的转置向量的乘积等形式来表现等。本申请实施例提供 的技术方案应理解为涵盖各种形式。举例来说，本申请实施例涉及的部分或者全部特性，应理解为涵盖该特性的各种表现形式。
待指示信息可以作为一个整体一起发送，也可以分成多个子信息分开发送，而且这些子信息的发送周期和/或发送时机可以相同，也可以不同。具体发送方法本申请不进行限定。其中，这些子信息的发送周期和/或发送时机可以是预先定义的，例如根据协议预先定义的，也可以是发射端设备通过向接收端设备发送配置信息来配置的。其中，该配置信息可以例如但不限于包括无线资源控制信令，例如无线资源控制(radio resource control，RRC)信令、MAC层信令，例如MAC-信息元素(control element，CE)，和物理层信令，例如下行控制信息(downlink control information，DCI)中的一种或者至少两种的组合。
第二，在本申请实施例中，预编码向量可以是指预编码矩阵中的一个向量，如，列向量。预编码矩阵可以包含一个或多个传输层的预编码向量，预编码矩阵中的每个列向量可以对应于一个传输层。
第三，在下文示出的实施例中第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的指示信息等。
在下文示出的实施例中，“预先获取”可包括由网络设备信令指示或者预先定义，例如，协议定义。其中，“预先定义”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。
第四，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
第五，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b和c中的至少一项(个)，可以表示：a，或，b，或，c，或，a和b，或，a和c，或，b和c，或，a、b和c，其中a，b，c可以是单个，也可以是多个。
下面将结合附图详细说明本申请实施例提供的指示上行预编码矩阵的方法和装置。
图2是本申请实施例提供的一种进行预编码的方法的示意性流程图。
201、网络设备对多个下行参考信号进行预编码。
具体来说，例如，在步骤201之前，终端设备可以先向网络设备发送上行参考信号，例如SRS。可以是一个终端设备向网络设备发送一个上行参考信号，也可以是一个终端设备在多个天线端口向网络设备发送多个上行参考信号，也可以是多个终端设备在多个天线端口上发送各自对应的上行参考信号。网络设备接收到上行参考信号后对该上行参考信号进行测量，获得上行信道矩阵，可以基于信道互易性确定下行信道矩阵，通过计算得到下行预编码向量，将下行预编码向量加载到下行参考信号上进行发送。
也就是说，网络设备对多个下行参考信号进行预编码，进而可以将经过预编码的下行参考信号发送给终端设备。当网络设备需要发送多个下行参考信号时，每个下行参考信号都可以经由上述的过程得到，即每个下行参考信号都可以由一个下行预编码向量进行预编 码后发送给终端设备。
预编码后的多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。因此，应当理解，网络设备(例如基站)在对每个下行参考信号进行预编码时，可以对所使用的预编码向量进行设计，使得终端设备对每个预编码后的下行参考信号进行信道测量后，获得的等效下行信道矩阵可以用于获得上行预编码向量，例如，该上行预编码向量等于等效下行信道矩阵，或者等于归一化后的等效下行信道矩阵。
202、网络设备发送经过预编码的多个下行参考信号。相应地，终端设备接收经过预编码的多个下行参考信号。
具体来说，网络设备发送的多个下行参考信号对应的是同一个上行数据流，由于每个天线端口的信道有所不同，即使发送的是同一个上行数据流对应的下行参考信号，实际网络设备发送的经过预编码每个下行参考信号也可能是有所不同的。因此，终端设备通过接收网络设备发送的经过预编码的多个下行参考信号，可以对多个下行参考信号进行处理，来获得该上行数据流对应的上行预编码向量。
203、终端设备对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
具体来说，该多个下行参考信号为同一个上行数据流对应的下行参考信号，终端设备通过对同一个上行数据流对应的多个下行参考信号进行测量，可以确定出该上行数据流对应的预编码向量。
具体来说，终端设备可以对多个下行参考信号中的每个下行参考信号进行测量，确定每个下行参考信号对应的上行预编码向量，再根据这些下行参考信号对应的上行预编码向量确定该上行数据流对应的上行预编码向量。
终端设备可以通过多种方式确定多个下行参考信号中的每个下行参考信号的上行预编码向量。例如，终端设备可以对多个下行参考信号中的每个下行参考信号进行测量，获得每个下行参考信号对应的等效下行信道矩阵，并根据该等效下行信道矩阵来确定每个下行参考信号对应的上行预编码向量。其中，下行参考信号对应的上行预编码向量可以等于其等效下行信道矩阵，或者等于归一化后的等效下行信道矩阵。因此，应当理解，网络设备(例如基站)在对每个下行参考信号进行预编码时，可以对所使用的预编码向量进行设计，使得终端设备对每个预编码后的下行参考信号进行信道测量后，获得的等效下行信道矩阵可以用于获得上行预编码向量，例如，该上行预编码向量等于等效下行信道矩阵，或者等于归一化后的等效下行信道矩阵。
终端设备也可以通过多种方式根据上述多个下行参考信号对应的上行预编码向量确定该上行数据流对应的上行预编码向量。例如，终端设备可以将多个下行参考信号对应的多个上行预编码进行求和，得到一个上行数据流对应的一个上行预编码向量；或者，终端设备也可以将多个下行参考信号对应的多个上行预编码向量求均值，将该均值作为一个上行数据流对应的一个上行预编码向量。本申请实施例中对多个下行参考信号对应的多个上行预编码向量的处理仅作为示例，不做限定，应理解，可以将多个下行参考信号对应的多个上行预编码向量处理为一个上行数据流对应的一个上行与编码向量的方法均在本申请的保护范围内。
当终端设备接收到的多个下行参考信号中包括多个上行数据流对应的下行参考信号 时，可以通过多种方法确定上行数据流对应的上行预编码向量。例如，可以对同一个上行数据流的每个下行参考信号进行测量，确定出每个下行参考信号对应的上行预编码向量，再由这些下行参考信号对应的上行预编码向量确定；也可以对所有上行数据流对应的所有下行参考信号一起进行测量，再对等效信道矩阵进行处理。其中，对等效信道矩阵进行处理可以是对某一个上行数据流对应的列进行求和，或求和后进行归一化；也可以是对某一个上行数据流对应的列进行求均值，或求均值后进行归一化。
在步骤203的基础上，可选地，终端设备可以进一步基于所述上行预编码向量对所述上行数据流进行预编码。具体来说，可以直接使用该上行预编码向量对上行数据流进行预编码，也可以先对得到的上行预编码向量进行处理，再对上行数据流进行预编码。其中，对上行预编码向量进行处理，可以是基于子带间的功率规划对子带间的功率进行分配，再根据分配的功率对上行数据流进行预编码。
本申请实施例提供的方案可以通过对多个下行参考信号进行测量，使终端设备可以根据测量结果较为精确地获得上行数据流对应的上行预编码向量，提高上行预编码向量的精度。例如，当终端设备接收到的下行参考信号信噪比比较低时，可以通过对多个下行参考信号进行处理，将多个下行参考信号对应的上行预编码向量处理为一个上行数据流对应的上行预编码向量，使得上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而能够提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
图3是本申请实施例提供的另一种进行预编码的方法的示意性流程图。
301、网络设备生成下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量。
具体来说，在步骤301之前，例如，终端设备可以先向网络设备发送SRS。网络设备根据SRS测量上行信道，根据信道测量的结果确定终端设备可以发送的上行数据流的数量和重复次数。应理解，网络设备可以根据SRS测量上行信道的测量结果确定上行数据流的数量和重复次数，并生成下行控制信息，也可以通过其他方式，例如根据网络设备中的预配置信息确定上行数据流的数量和重复次数，并生成下行控制信息，本申请对网络设备确定上行数据流的数量和重复次数的方式不做限定。
同时，网络设备还可以确定为终端设备配置的端口的相关信息，例如网络设备可以确定发送下行参考信号的端口的编号和数量。具体来说，网络设备可以根据上行信道的测量结果，在确定终端设备可以发送的上行数据流的数量和重复次数后，可以将上行数据流的数量和重复次数相乘得到终端设备实际需要用到的端口的数量。由网络设备配置的端口的数量通常为2的k次方的值，k为正整数，例如2、4、8等。当终端设备实际需要的端口的数量并不恰好为2的k次方的值时，网络设备配置的端口数量为2的k次方的值中大于该实际占用的端口的数量。例如，当终端设备实际需要的端口的数量为3时，网络设备为终端设备配置的端口数可以为4，若此时上行数据流的数量为3，则在配置的4个端口中，可以是前3个端口上进行信道估计后的等效信道用作确定这3个上行数据流的上行预编码向量；再例如，当上行数据流的数量为3、重复次数为2时，终端设备实际用到的端口的 数量为6，网络设备配置的端口数为8，则终端设备可以在8个端口中的前6个端口上接收这3个上行数据流的下行参考信号，并进行信道估计，得到这3个上行数据流对应的预编码向量。另外，网络设备可以通过信令为终端设备配置端口的数量，具体来说，可以通过RRC信令中与端口的数量相关的信元nrofPorts来为终端设备配置具体的端口的数量。应理解，天线端口与下行参考信号资源具有对应关系，例如天线端口可以与下行参考信号的标识(identifier，ID)对应，也可以与发送下行参考信号的时频资源位置对应，网络设备为终端设备配置端口也可以理解为网络设备为终端设备配置下行参考信号资源。
302、网络设备向终端设备发送下行控制信息，终端设备接收下行控制信息。
终端设备接收到网络设备发送的下行控制信息后，可以获取到上行数据流的数量和重复次数。具体来说，终端设备可以通过下行控制信息中的具体字段直接获取到上行数据流的数量和重复次数。例如，下行控制信息在指示上行数据流的数量时，可以复用现有的下行控制信息，在传输预编码矩阵指示(Transport Precoding Matrix Indicator，TPMI)中获取上行数据流的数量，即在TPMI中只有指示上行数据流的数量的部分有效。或者，在下行控制信息中新增字段来指示上行数据流的数量。同样，可以复用现有的下行控制信息或在下行控制信息中新增字段来指示重复次数。
终端设备也可以在接收到下行控制信息后，通过其他方式获取上行数据流的数量和重复次数。具体来说，实际用到的端口数量为上行数据流的数量和重复次数的乘积，因此，终端设备可以根据上行数据流的数量、重复次数和端口数量三者中的任意两者确定第三个参数。应理解，实际用到的端口数量即为终端设备实际接收到的下行参考信号的数量。
例如，若终端设备通过信令消息或指示信息等接收到了端口数量和上行数据流的数量，可以通过将端口的数量和上行数据流的数量两者相除向下取整计算出重复次数。例如，当指示的上行数据流的数量为2，配置的端口数量为4时，则可以计算出重复次数为2；当指示的上行数据流的数量为3，配置的端口数量为8时，则可以计算出重复次数为2。重复次数用于指示每个上行数据流对应的下行参考信号的数量，终端设备可以根据预设规则、上行数据流的数量和重复次数来确定每个上行数据流对应的多个下行参考信号。
其中，预设规则可以理解为不同的上行数据流与端口的对应关系，通常预配置在网络设备和终端设备中。以4个端口、2个上行数据流、重复2次为例，将上行数据流编号为数据流#1、数据流#2，则预设规则可以为“#1、#2、#1、#2”或“#1、#1、#2、#2”。应理解，当3个上行数据流、重复2次时，将上行数据流编号为数据流#1、数据流#2、数据流#3，预设规则“#1、#2、#3、#1、#2、#3”与上述“#1、#2、#1、#2”为同一种预设规则，预设规则“#1、#1、#2、#2、#3、#3”与上述“#1、#1、#2、#2”为同一种预设规则；当2个上行数据流、重复3次时，将上行数据流编号为数据流#1、数据流#2，预设规则“#1、#2、#1、#2、#1、#2”与上述“#1、#2、#1、#2”为同一种预设规则，预设规则“#1、#1、#1、#2、#2、#2”与上述“#1、#1、#2、#2”为同一种预设规则。上述预设规则仅为举例，不做限定。
为了便于描述，将2个上行数据流重复2次中“#1、#2、#1、#2”类型的预设规则命名为第一预设规则，将“#1、#1、#2、#2”类型的预设规则命名为第二预设规则。即，第一预设规则为m个上行数据流的下行参考信号按照端口编号依次排列，重复n次，m为正整数，n为大于或等于2的正整数；第二预设规则为a个上行数据流中的每个上行数据 流都按照端口编号依次重复b次，a为正整数，b为大于或等于2的正整数。
应理解，本申请具体实施例中的预设规则不限于第一预设规则或第二预设规则或按照一定规律进行的排列方式，也包括其他排列方式，例如，在以4个端口、2个上行数据流、重复2次为例的情况下，“#1、#2、#2、#1”或“#2、#1、#2、#1”等排列方式也可以作为一种预设规则；当重复次数不固定时，例如4个端口、3个上行数据流、数据流#1重复2次的情况下，“#1、#1、#2、#3”、“#2、#1、#1、#3”或“#2、#3、#1、#1”等排列组合均可以作为一种预设规则。也就是说，可以将不同的上行数据流与端口进行对应的排列组合都可以包括在本申请实施例涉及的预设规则中。
预设规则通常预配置在网络设备和终端设备中。若预配置在网络设备和终端设备中的预设规则仅有一种，则网络设备和终端设备直接根据该预配置信息调用该预设规则。在本申请实施例中，即网络设备按照该预设规则，在规定的下行参考信号资源中发送至少一个上行数据流中的每个上行数据流的下行参考信号，相应地终端设备按照预配置的预设规则在下行参考信号资源中确定每个上行数据流对应的下行参考信号。若预配置的预设规则有多种，则网络设备根据其中一种预设规则，在规定的下行参考信号资源中发送至少一个上行数据流中的每个上行数据流的下行参考信号，并通过指示信息告知终端设备按照该种预设规则在下行参考信号资源中确定每个上行数据流对应的下行参考信号。
可选地，终端设备还可以根据下行控制信息确定下行参考信号资源。
举例来说，可以在下行控制信息中同时指示与下行参考信号有关的的ID，例如信道状态信息(channel state information，CSI)测量的ID，信道测量资源配置的ID等，使终端设备在接收到下行控制信息后，可以通过下行控制信息中包括的ID信息，确定待接收的下行参考信号的资源。可选地，也可以在下行控制信息相关的时频资源位置上确定下行参考信号资源。例如，可以在终端设备接收下行控制信息的时隙，或接收下行控制信息所在时隙的下一个时隙，或某个指定的时隙上确定下行参考信号资源，其中，可以通过下行控制信息指示该下行参考信号资源。进而，终端设备可以在该下行参考信号资源中确定上行数据流对应的下行参考信号。
此外，终端设备还可以通过其他方法确定下行参考信号资源，例如但不限于，该下行参考信号资源可以是RRC信令预配置的下行参考信号资源等。
303、终端设备根据重复次数、上行数据流的数量和预设规则，确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
具体来说，网络设备可以根据上行数据流的数量、预设规则和重复次数确定每个上行数据流对应的下行参考信号端口，在对应的端口上发送相应上行数据流对应的下行参考信号。终端设备相应地可以根据重复次数、上行数据流的数量和预设规则，在对应的端口上接收相应上行数据流对应的下行参考信号。其中，重复次数用于指示每个上行数据流对应的下行参考信号的数量，每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码。
具体的预设规则可以是上文中描述的第一预设规则或第二预设规则，也可以是其他不具有一定规律的预设规则。当存在多个上行数据流时，预设规则中可以只有一个上行数据流对应多个下行参考信号，例如数据流#1、数据流#2、数据流#3中只有数据流#1对应2个下行参考信号；也可以有多个上行数据流对应多个下行参考信号，例如数据流#1、数据 流#2、数据流#3中数据流#1和数据流#2各对应2个下行参考信号，数据流#3仅对应一个下行参考信号；也可以是每一个上行数据流都对应多个下行参考信号，例如数据流#1、数据流#2、数据流#3均对应2个下行参考信号。多个上行数据流对应的多个下行参考信号的数量也可以不同，例如，可以是数据流#1对应2个下行参考信号，数据流#2对应3个下行参考信号。预设规则用于与上行数据流的数量相结合确定上行数据流与下行参考信号的对应关系。
网络设备在向终端设备发送下行参考信号的过程中，举例来说，以配置2个上行数据流、重复2次、以第一预设规则发送下行参考信号为例，此时网络设备配置的端口的数量为4。网络设备在第一个和第三个CSI-RS端口发送波束赋形(beamformed)CSI-RS，使得终端设备在这两个端口上收到的下行参考信号经过信道估计后得到的等效信道可以用作确定第一个上行数据流的上行预编码向量。应理解，第一个和第三个CSI-RS端口的信道有所不同，所以实际网络设备发送的波束赋形CSI-RS的预编码向量可能是有所不同的。同样，网络设备在第二个和第四个CSI-RS端口发送波束赋形CSI-RS，使得终端设备在这两个端口上接收到的下行参考信号经过信道估计后得到的等效信道可以用作确定第二个上行数据流的上行预编码向量。
以配置3个上行数据流、重复2次、以第二预设规则发送下行参考信号为例，此时网络设备配置的端口的数量为8。网络设备在第一个和第二个CSI-RS端口发送波束赋形CSI-RS，使得终端设备在这两个端口上收到的下行参考信号经过信道估计后得到的等效信道可以用作确定第一个上行数据流的上行预编码向量。同样，网络设备在第三个和第四个CSI-RS端口发送波束赋形CSI-RS，使得终端设备在这两个端口上接收到的下行参考信号经过信道估计后得到的等效信道可以用作确定第二个上行数据流的上行预编码向量；在第五个和第六个CSI-RS端口发送波束赋形CSI-RS，使得终端设备在这两个端口上接收到的下行参考信号经过信道估计后得到的等效信道可以用作确定第三个上行数据流的上行预编码向量。应理解，不同CSI-RS端口的信道有所不同，所以即使发送的是同一个上行数据流的下行参考信号，在不同端口上网络设备实际发送的波束赋形CSI-RS的预编码向量可能是有所不同的。
终端设备在接收网络设备发送的下行参考信号的过程中，举例来说，终端设备获取到上行数据流的数量为2，重复次数为2，以第一预设规则发送下行参考信号。将上行数据流编号为数据流#1、数据流#2，则可以确定数据流#1对应第一个和第三个端口，数据流#2对应第二个和第四个端口。即，终端设备在第一个和第三个端口接收数据流#1的下行参考信号，在第二个和第四个端口接收数据流#2的下行参考信号。
再例如，终端设备获取到上行数据流的数量为3，重复次数为2，以第二预设规则发送下行参考信号。将上行数据流编号为数据流#1、数据流#2、数据流#3，则可以确定数据流#1对应第一个和第二个端口，数据流#2对应第三个和第四个端口，数据流#3对应第五个和第六个端口。即，终端设备在第一个和第二个端口接收数据流#1的下行参考信号，在第三个和第四个端口接收数据流#2的下行参考信号，在第五个和第六个端口接收数据流#3的下行参考信号。
终端设备根据上行数据流的数量、预设规则和重复次数确定多个上行数据流中每一个上行数据流对应的下行参考信号。如此一来，终端设备便可根据该下行参考信号，确定上 行数据流对应的预编码向量，以便对上行数据流进行预编码。在这种情况下，当终端设备接收到的下行参考信号信噪比较低时，可以通过对每个上行数据流对应的多个下行参考信号进行处理，使得每个上行数据流对应的多个下行参考信号之间的噪声和干扰在一定程度上能够相互抵消，进而提高终端设备接收到的下行参考信号的信噪比，由此能够进一步解决终端设备接收到的信号被噪声干扰，无法解码出需要的信息，导致无法获得上行数据流对应的上行预编码向量的问题，进而可以提高上行预编码矩阵的精度和上行传输的鲁棒性。
以上结合了图2和图3详细说明了本申请实施例提供的指示上行预编码矩阵的方法，以下将结合图4至图7详细说明本申请实施例提供的通信装置。
图4是本申请实施例提供的一种进行预编码的装置的示意性框图。如图所示，该通信装置400可以包括收发单元401和确定单元402，可选地，该通信装置400还可以包括处理单元403。
在一种可能的设计中，该通信装置400可对应于上文方法实施例中的终端设备，例如，可以为终端设备，或者配置于终端设备中的芯片。
具体地，收发单元401可以用于接收经过预编码的多个下行参考信号，确定单元402可以用于对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
在一个实施例中，确定单元402具体用于对多个下行参考信号中的每个下行参考信号进行测量，确定每个下行参考信号对应的上行预编码向量，根据多个下行参考信号对应的上行预编码向量，确定上行预编码向量。
在另一个实施例中，确定单元402具体用于对每个下行参考信号进行测量，获得每个下行参考信号对应的等效下行信道矩阵，根据每个下行参考信号对应的等效下行信道矩阵，确定每个下行参考信号对应的上行预编码向量。
在另一个实施例中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
在另一个实施例中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
在另一个实施例中，该装置还包括：处理单元403，该处理单元403用于基于该上行预编码向量对该上行数据流进行预编码。
在另一个实施例中，处理单元403具体用于对所述上行预编码向量进行处理，根据处理后的所述上行预编码向量对所述上行数据流进行预编码。
在另一个实施例中，处理单元403具体用于使用所述上行预编码向量对所述上行数据流进行预编码。
在另一个实施例中，该多个下行参考信号中的每个下行参考信号由一个下行预编码向量进行预编码，该下行预编码向量是通过对上行参考信号进行测量确定的。
在另一种可能的设计中，该通信装置400可对应于上文方法实施例中的终端设备，例如，可以为终端设备，或者配置于终端设备中的芯片。
具体地，收发单元401用于接收下行控制信息，下行控制信息用于指示重复次数和上行数据流的数量，其中重复次数用于指示每个上行数据流对应的下行参考信号的数量，其 中，每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码。
确定单元402用于根据重复次数、上行数据流的数量和预设规则，在下行参考信号资源中确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
图5是本申请实施例提供的另一种进行预编码的装置的示意性框图。如图所示，该通信装置500可以包括处理单元501和收发单元502。
在一种可能的设计中，该通信装置500可对应于上文方法实施例中的网络设备。
具体地，处理单元501用于对多个下行参考信号进行预编码；收发单元502用于发送预编码后的该多个下行参考信号，其中，预编码后的该多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。
在一个实施例中，该上行预编码向量是根据该多个下行参考信号对应的上行预编码向量确定的，每个上行预编码向量是对该多个下行参考信号中的每个下行参考信号进行测量确定的。
在另一个实施例中，每个下行参考信号对应的上行预编码向量是根据每个下行参考信号对应的等效下行信道矩阵确定的，每个下行参考信号对应的等效下行信道矩阵是对每个下行参考信号进行测量获得的。
在另一个实施例中，该下行参考信号对应的上行预编码向量等于该等效下行信道矩阵或者归一化后的该等效下行信道矩阵。
在另一个实施例中，该上行数据流对应的上行预编码向量为该多个下行参考信号对应的上行预编码向量的均值，或者该上行数据流对应的上行预编码向量为该多个下行参考信号对应的下行预编码向量的和。
在另一种可能的设计中，该通信装置500可对应于上文方法实施例中的网络设备。
具体地，处理单元501用于生成下行控制信息，该下行控制信息用于指示重复次数和上行数据流的数量，其中该重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，该每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码，每个上行数据流对应的下行参考信号是根据该重复次数、该上行数据流的数量和预设规则确定的。
收发单元502用于发送该下行控制信息。
图6是本申请实施例提供的一种终端设备的结构示意图。该终端设备2000可应用于如图1所示的系统中，执行上述方法实施例中终端设备的功能。如图所示，该终端设备2000包括处理器2010和收发器2020。可选地，该终端设备2000还包括存储器2030。其中，处理器2010、收发器2002和存储器2030之间可以通过内部连接通路互相通信，传递控制和/或数据信号，该存储器2030用于存储计算机程序，该处理器2010用于从该存储器2030中调用并运行该计算机程序，以控制该收发器2020收发信号。可选地，终端设备2000还可以包括天线2040，用于将收发器2020输出的上行数据或上行控制信令通过无线信号发送出去。
上述处理器2010可以和存储器2030可以合成一个处理装置，处理器2010用于执行存储器2030中存储的程序代码来实现上述功能。具体实现时，该存储器2030也可以集成在处理器2010中，或者独立于处理器2010。该处理器2010可以与图4中的处理单元403 和/或确定单元402对应。
上述收发器2020可以与图4中的收发单元401对应，也可以称为通信单元。收发器2020可以包括接收器(或称接收机、接收电路)和发射器(或称发射机、发射电路)。其中，接收器用于接收信号，发射器用于发射信号。
应理解，图6所示的终端设备2000能够实现图2至图3所示方法实施例中涉及终端设备的各个过程。终端设备2000中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述处理器2010可以用于执行前面方法实施例中描述的由终端设备内部实现的动作，而收发器2020可以用于执行前面方法实施例中描述的终端设备向网络设备发送或从网络设备接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
可选地，上述终端设备2000还可以包括电源2050，用于给终端设备中的各种器件或电路提供电源。
除此之外，为了使得终端设备的功能更加完善，该终端设备2000还可以包括输入单元2060、显示单元2070、音频电路2080、摄像头2090和传感器2100等中的一个或多个，所述音频电路还可以包括扬声器2082、麦克风2084等。
图7是本申请实施例提供的一种网络设备的结构示意图，例如可以为基站的结构示意图。该基站3000可应用于如图1所示的系统中，执行上述方法实施例中网络设备的功能。
如图所示，该基站3000可以包括一个或多个射频单元，如远端射频单元(remote radio unit，RRU)3100和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)3200。所述RRU 3100可以称为收发单元，与图5中的收发单元502对应。可选地，该收发单元3100还可以称为收发机、收发电路、或者收发器等等，其可以包括至少一个天线3101和射频单元3102。可选地，收发单元3100可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。所述RRU 3100部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送指示信息。所述BBU 3200部分主要用于进行基带处理，对基站进行控制等。所述RRU 3100与BBU 3200可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 3200为基站的控制中心，也可以称为处理单元，可以与图5中的处理单元501对应，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)可以用于控制基站执行上述方法实施例中关于网络设备的操作流程，例如，生成上述指示信息等。
在一个示例中，所述BBU 3200可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述BBU 3200还包括存储器3201和处理器3202。所述存储器3201用以存储必要的指令和数据。所述处理器3202用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器3201和处理器3202可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有 必要的电路。
应理解，图7所示的基站3000能够实现图2至图3的方法实施例中涉及网络设备的各个过程。基站3000中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述BBU 3200可以用于执行前面方法实施例中描述的由网络设备内部实现的动作，而RRU 3100可以用于执行前面方法实施例中描述的网络设备向终端设备发送或从终端设备接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
本申请实施例还提供了一种处理装置，包括处理器和接口；所述处理器用于执行上述任一方法实施例中的通信的方法。
应理解，上述处理装置可以是一个芯片。例如，该处理装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、 同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行图2至图3所示实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种计算机可读介质，该计算机可读介质存储有程序代码，当该程序代码在计算机上运行时，使得该计算机执行图2至图3所示实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的一个或多个终端设备以及一个或多个网络设备。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (34)

  1. 一种进行预编码的方法，其特征在于，包括：
    接收经过预编码的多个下行参考信号；
    对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
  2. 如权利要求1所述的方法，其特征在于，所述对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量，具体包括：
    对所述多个下行参考信号中的每个下行参考信号进行测量，确定所述每个下行参考信号对应的上行预编码向量；
    根据所述多个下行参考信号对应的上行预编码向量，确定所述上行预编码向量。
  3. 如权利要求2所述的方法，其特征在于，所述对所述多个下行参考信号中的每个下行参考信号进行测量，确定所述每个下行参考信号对应的上行预编码向量，具体包括：
    对所述每个下行参考信号进行测量，获得所述每个下行参考信号对应的等效下行信道矩阵；
    根据所述每个下行参考信号对应的等效下行信道矩阵，确定所述每个下行参考信号对应的上行预编码向量。
  4. 如权利要求3所述的方法，其特征在于，所述下行参考信号对应的上行预编码向量等于所述等效下行信道矩阵或者归一化后的所述等效下行信道矩阵。
  5. 如权利要求2所述的方法，其特征在于，所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的上行预编码向量的均值，或者所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的下行预编码向量的和。
  6. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    基于所述上行预编码向量对所述上行数据流进行预编码。
  7. 如权利要求6所述的方法，其特征在于，所述基于所述上行预编码向量对所述上行数据流进行预编码，具体包括：
    对所述上行预编码向量进行处理；
    根据处理后的所述上行预编码向量对所述上行数据流进行预编码。
  8. 如权利要求6所述的方法，其特征在于，所述基于所述上行预编码向量对所述上行数据流进行预编码，具体包括：
    使用所述上行预编码向量对所述上行数据流进行预编码。
  9. 如权利要求1所述的方法，其特征在于，所述多个下行参考信号中的每个下行参考信号由一个下行预编码向量进行预编码，所述下行预编码向量是通过对上行参考信号进行测量确定的。
  10. 一种进行预编码的方法，其特征在于，包括：
    接收下行控制信息，所述下行控制信息用于指示重复次数和上行数据流的数量，其中所述重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，所述每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码；
    根据所述重复次数、所述上行数据流的数量和预设规则，确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
  11. 一种进行预编码的方法，其特征在于，包括：
    对多个下行参考信号进行预编码；
    发送预编码后的所述多个下行参考信号，其中，预编码后的所述多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。
  12. 如权利要求11所述的方法，其特征在于，所述上行预编码向量是根据所述多个下行参考信号对应的上行预编码向量确定的，每个上行预编码向量是对所述多个下行参考信号中的每个下行参考信号进行测量确定的。
  13. 如权利要求12所述的方法，其特征在于，每个下行参考信号对应的上行预编码向量是根据所述每个下行参考信号对应的等效下行信道矩阵确定的，每个下行参考信号对应的等效下行信道矩阵是对所述每个下行参考信号进行测量获得的。
  14. 如权利要求13所述的方法，其特征在于，所述下行参考信号对应的上行预编码向量等于所述等效下行信道矩阵或者归一化后的所述等效下行信道矩阵。
  15. 如权利要求12所述的方法，其特征在于，所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的上行预编码向量的均值，或者所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的下行预编码向量的和。
  16. 一种进行预编码的方法，其特征在于，包括：
    生成下行控制信息，所述下行控制信息用于指示重复次数和上行数据流的数量，其中所述重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，所述每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码，每个上行数据流对应的下行参考信号是根据所述重复次数、所述上行数据流的数量和预设规则确定的；
    发送所述下行控制信息。
  17. 一种进行预编码的装置，其特征在于，包括：
    收发单元，所述收发单元用于接收经过预编码的多个下行参考信号；
    确定单元，所述确定单元用于对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量。
  18. 如权利要求17所述的装置，其特征在于，所述确定单元用于对所述多个下行参考信号进行测量，确定上行数据流对应的上行预编码向量，具体包括：
    所述确定单元用于对所述多个下行参考信号中的每个下行参考信号进行测量，确定所述每个下行参考信号对应的上行预编码向量，根据所述多个下行参考信号对应的上行预编码向量，确定所述上行预编码向量。
  19. 如权利要求18所述的装置，其特征在于，所述确定单元用于对所述多个下行参考信号中的每个下行参考信号进行测量，确定所述每个下行参考信号对应的上行预编码向量，具体包括：
    所述确定单元用于对所述每个下行参考信号进行测量，获得所述每个下行参考信号对应的等效下行信道矩阵，根据所述每个下行参考信号对应的等效下行信道矩阵，确定所述每个下行参考信号对应的上行预编码向量。
  20. 如权利要求19所述的装置，其特征在于，所述下行参考信号对应的上行预编码向量等于所述等效下行信道矩阵或者归一化后的所述等效下行信道矩阵。
  21. 如权利要求18所述的装置，其特征在于，所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的上行预编码向量的均值，或者所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的下行预编码向量的和。
  22. 如权利要求17所述的装置，其特征在于，所述装置还包括：
    处理单元，所述处理单元用于基于所述上行预编码向量对所述上行数据流进行预编码。
  23. 如权利要求22所述的装置，其特征在于，所述处理单元用于基于所述上行预编码向量对所述上行数据流进行预编码，具体包括：
    所述处理单元用于对所述上行预编码向量进行处理，根据处理后的所述上行预编码向量对所述上行数据流进行预编码。
  24. 如权利要求22所述的装置，其特征在于，所述处理单元用于基于所述上行预编码向量对所述上行数据流进行预编码，具体包括：
    所述处理单元用于使用所述上行预编码向量对所述上行数据流进行预编码。
  25. 如权利要求17所述的装置，其特征在于，所述多个下行参考信号中的每个下行参考信号由一个下行预编码向量进行预编码，所述下行预编码向量是通过对上行参考信号进行测量确定的。
  26. 一种进行预编码的装置，其特征在于，包括：
    收发单元，所述收发单元用于接收下行控制信息，所述下行控制信息用于指示重复次数和上行数据流的数量，其中所述重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，所述每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码；
    确定单元，所述处理单元用于根据所述重复次数、所述上行数据流的数量和预设规则，确定至少一个上行数据流中的每个上行数据流对应的多个下行参考信号。
  27. 一种进行预编码的装置，其特征在于，包括：
    处理单元，所述处理单元用于对多个下行参考信号进行预编码；
    收发单元，所述收发单元用于发送预编码后的所述多个下行参考信号，其中，预编码后的所述多个下行参考信号的测量结果用于确定上行数据流对应的上行预编码向量。
  28. 如权利要求27所述的装置，其特征在于，所述上行预编码向量是根据所述多个下行参考信号对应的上行预编码向量确定的，每个上行预编码向量是对所述多个下行参考信号中的每个下行参考信号进行测量确定的。
  29. 如权利要求28所述的装置，其特征在于，每个下行参考信号对应的上行预编码向量是根据所述每个下行参考信号对应的等效下行信道矩阵确定的，每个下行参考信号对应的等效下行信道矩阵是对所述每个下行参考信号进行测量获得的。
  30. 如权利要求29所述的装置，其特征在于，所述下行参考信号对应的上行预编码向量等于所述等效下行信道矩阵或者归一化后的所述等效下行信道矩阵。
  31. 如权利要求28所述的装置，其特征在于，所述上行数据流对应的上行预编码向量为所述多个下行参考信号对应的上行预编码向量的均值，或者所述上行数据流对应的上 行预编码向量为所述多个下行参考信号对应的下行预编码向量的和。
  32. 一种进行预编码的装置，其特征在于，包括：
    处理单元，所述处理单元用于生成下行控制信息，所述下行控制信息用于指示重复次数和上行数据流的数量，其中所述重复次数用于指示每个上行数据流对应的下行参考信号的数量，其中，所述每个上行数据流对应的下行参考信号用于确定该上行数据流对应的预编码向量，该预编码向量用于对该上行数据流进行预编码，每个上行数据流对应的下行参考信号是根据所述重复次数、所述上行数据流的数量和预设规则确定的；
    收发单元，所述收发单元用于发送所述下行控制信息。
  33. 一种通信装置，其特征在于，包括：
    存储器，所述存储器用于存储计算机程序；
    处理器，所述处理器用于执行所述存储器中存储的部分或全部所述计算机程序，以使得所述设备执行如权利要求1至10中任一项所述的方法，或者执行如权利要求11至16中任一项所述的方法。
  34. 一种计算机可读存储介质，其特征在于，包括计算机程序，当部分或全部所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至10中任一项所述的方法，或者执行如权利要求11至16中任一项所述的方法。
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