WO2024109633A1 - 信道状态信息发送方法、信道状态信息接收方法和装置 - Google Patents

信道状态信息发送方法、信道状态信息接收方法和装置 Download PDF

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Publication number
WO2024109633A1
WO2024109633A1 PCT/CN2023/132185 CN2023132185W WO2024109633A1 WO 2024109633 A1 WO2024109633 A1 WO 2024109633A1 CN 2023132185 W CN2023132185 W CN 2023132185W WO 2024109633 A1 WO2024109633 A1 WO 2024109633A1
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Prior art keywords
reference signal
ports
port
terminal device
state information
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PCT/CN2023/132185
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English (en)
French (fr)
Inventor
陈雷
刘凤威
张珍兵
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP23893723.9A priority Critical patent/EP4589858A4/en
Publication of WO2024109633A1 publication Critical patent/WO2024109633A1/zh
Priority to US19/212,601 priority patent/US20250279814A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]

Definitions

  • the present application relates to the field of communication technology, and in particular to a method for sending channel state information, a method for receiving channel state information, and an apparatus.
  • network equipment In high-frequency communication systems, network equipment usually uses large-scale array antennas to transmit signals. Network equipment uses higher array gain to counter the path loss caused by the increase in frequency band and improve coverage. From the perspective of the implementation method of network equipment, according to the implementation scheme of beamforming, it can be roughly divided into three array weighting methods, namely digital beamforming (DBF), analog beamforming (ABF) and hybrid beamforming (HBF).
  • DBF digital beamforming
  • ABSF analog beamforming
  • HBF hybrid beamforming
  • the process of the network device selecting a beam for the terminal device can be called beam scanning or beam training.
  • Beam scanning is that the network device uses different beams to send reference signals respectively, and the terminal device measures the reference signals respectively and feeds back the measurement results. This helps the network device determine which beam has the best signal quality and selects the beam with the best signal quality for the communication transmission of the terminal device.
  • the network device needs to send a corresponding reference signal separately.
  • the terminal device measures the reference signal on each beam and feeds back the corresponding channel state information. That is, the network device can only select one beam and send the corresponding reference signal at the same time.
  • the reference signals of different beams can only be sent in a time-division manner. This results in low efficiency of the network device in obtaining channel state information.
  • the present application provides a channel state information sending method, a channel state information receiving method and an apparatus, which are used to improve the efficiency of network equipment in acquiring channel state information.
  • the first aspect of the present application provides a method for sending channel state information, including:
  • the terminal device receives a reference signal from a network device, where the reference signal corresponds to a plurality of reference signal ports; the terminal device determines N first port groups based on the plurality of reference signal ports, where the plurality of reference signal ports include all reference signal ports of the N first port groups, and different first port groups in the N first port groups include different reference signal ports, where N is an integer greater than or equal to 1; the terminal device determines channel state information of the N equivalent ports under the first weight based on the first weight and the channel information of the N first port groups, where the N first port groups correspond one-to-one to the N equivalent ports, and the terminal device sends first channel state information to the network device, where the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • the terminal device determines the channel state information of N equivalent ports under the first weight according to the first weight and the channel information of N first port groups. Furthermore, the channel information of the N first port groups is determined according to the reference signal. The channel information of the N first port groups is more complete channel information. Thereby, the terminal device obtains the channel state information of the beam corresponding to the first weight. For the terminal device, the terminal device can obtain more complete channel information based on the reference signal. It is beneficial for the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and to feed back the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining the channel state information. Furthermore, the terminal device can obtain relatively complete channel information by measuring the reference signal, without measuring multiple reference signals, thereby reducing the power consumption loss caused by the terminal device measuring the reference signal.
  • a second aspect of the present application provides a channel state sending method, including:
  • the terminal device receives a reference signal from a network device, the reference signal corresponds to a plurality of reference signal ports; the terminal device determines channel information of the plurality of reference signal ports according to the reference signal; the terminal device determines channel information of N first port groups according to the channel information of the plurality of reference signal ports, the plurality of reference signal ports include all reference signal ports of the N first port groups, different first port groups in the N first port groups include different reference signal ports, and N is an integer greater than or equal to 1; the terminal device determines the channel information of N first port groups according to the first weight and the N first port groups.
  • the channel information determines the channel state information of N equivalent ports under the first weight, and the N first port groups correspond one to one to the N equivalent ports; the terminal device sends the first channel state information to the network device, and the first channel state information is determined according to the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • the terminal device determines the channel information of the multiple reference signal ports through the reference signal.
  • the channel information of the multiple reference signal ports is more complete channel information.
  • the terminal device can determine the channel information of the N first port groups based on the channel information of the multiple reference signal ports, and then determine the channel state information of the N equivalent ports under the first weight in combination with the first weight and the channel information of the N first port groups. Thereby, the terminal device obtains the channel state information of the beam corresponding to the first weight.
  • the terminal device can obtain more complete channel information based on the reference signal. It is beneficial for the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and to feed back the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining channel state information.
  • the terminal device can obtain relatively complete channel information by measuring the reference signal, without measuring multiple reference signals, thereby reducing the power consumption loss caused by the terminal device measuring the reference signal.
  • a third aspect of the present application provides a channel state information receiving method, comprising:
  • a network device sends a reference signal to a terminal device, and the reference signal corresponds to a plurality of reference signal ports; the network device receives first channel state information from the terminal device; wherein the first channel state information is determined based on the channel state information of N equivalent ports under a first weight, or the first channel state information includes the channel state information of N equivalent ports under the first weight; the channel state information of the N equivalent ports under the first weight is determined based on the first weight and the channel information of N first port groups, the N first port groups correspond one-to-one to the N equivalent ports, the plurality of reference signal ports include all reference signal ports of the N first port groups, different first port groups in the N first port groups include different reference signal ports, and N is an integer greater than or equal to 1.
  • the network device sends a reference signal to the terminal device. This facilitates the terminal device to obtain the channel information of the N first port groups.
  • the channel information of the N first port groups is determined according to the reference signal.
  • the network device receives the first channel state information from the terminal device; wherein, the first channel state information is determined according to the channel state information of the N equivalent ports under the first weight.
  • the channel state information of the N equivalent ports under the first weight is determined according to the first weight and the channel information of the N first port groups.
  • the channel information of the N first port groups is more complete channel information.
  • the terminal device obtains the channel state information of the beam corresponding to the first weight. For the terminal device, the terminal device can obtain more complete channel information based on the reference signal.
  • the terminal device can quickly obtain the channel state information of the beam corresponding to each weight, and feedback the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining the channel state information. Furthermore, the terminal device can obtain relatively complete channel information by measuring the reference signal, without measuring multiple reference signals, thereby reducing the power consumption loss caused by the terminal device measuring the reference signal.
  • a fourth aspect of the present application provides a channel state information receiving method, including:
  • a network device sends a reference signal to a terminal device, the reference signal corresponds to a plurality of reference signal ports; the network device receives first channel state information from the terminal device; wherein the first channel state information is determined based on the channel state information of N equivalent ports at a first weight, or the first channel state information includes the channel state information of N equivalent ports at the first weight; the channel state information of the N equivalent ports at the first weight is determined based on the first weight and the channel information of N first port groups, the N equivalent ports correspond one-to-one to the N equivalent ports, the channel information of the N first port groups is determined based on the channel information of a plurality of reference signal ports, the channel information of the plurality of reference signal ports is determined based on the reference signal, and N is an integer greater than or equal to 1.
  • the network device sends a reference signal to the terminal device.
  • the terminal device determines the channel information of the multiple reference signal ports through the reference signal.
  • the channel information of the multiple reference signal ports is more complete channel information.
  • the terminal device can determine the channel information of the N first port groups according to the channel information of the multiple reference signal ports, and then determine the channel state information of the N equivalent ports under the first weight in combination with the first weight and the channel information of the N first port groups. Thereby, the terminal device obtains the channel state information of the beam corresponding to the first weight. For the terminal device, the terminal device can obtain more complete channel information based on the reference signal.
  • the terminal device it is beneficial for the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and feedback the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining channel state information. Furthermore, the network device only needs to send the reference signal through the resources of the reference signal, and there is no need to configure the resources of multiple reference signals for channel measurement, thereby reducing the resource overhead and the power consumption loss caused by the network device sending the reference signal.
  • the channel state information of the N equivalent ports under the first weight includes a first precoding matrix indicator (precoding matrix indicator, PMI), and the first PMI is used to indicate the precoding matrix of the N equivalent ports under the first weight;
  • the first channel state information includes an index and a first coefficient of the first basis, and the first coefficient is a root Determined according to the precoding matrix of N equivalent ports under the first weight and the first basis, the first basis is a spatial basis, a frequency domain basis, or a space-frequency joint basis.
  • the first channel state information includes an index and a first coefficient of the first basis. That is, the terminal device quantizes and compresses the first PMI through the first basis, thereby reducing the overhead caused by the terminal device reporting the first PMI.
  • the first channel state information includes an index of a frequency domain basis and a second coefficient corresponding to a precoding weight of M equivalent ports among N equivalent ports under a first weight, the second coefficient being determined according to the precoding weight of the M equivalent ports under the first weight and the frequency domain basis, where M is greater than or equal to 1 and less than N.
  • the terminal device may choose to report the channel state information of some equivalent ports under the first weight, thereby reducing reporting overhead.
  • the first channel state information further includes at least one of the following: a first channel quality indicator (CQI) and a first rank indicator (RI); wherein the first CQI is used to indicate the channel quality corresponding to the N equivalent ports under the first weight, and the first RI is used to indicate the rank of the channel corresponding to the N equivalent ports under the first weight.
  • the first information state information may also include more channel state information of the N equivalent ports under the first weight, so as to facilitate the network device to determine the signal quality of the beam corresponding to the first weight.
  • the method further includes:
  • the terminal device determines the channel state information of the N equivalent ports at each second weight among the R second weights according to the R second weights and the channel information of the N first port groups, where R is an integer greater than or equal to 1; the first channel state information is determined according to the channel state information of the N equivalent ports at the first weights and the channel state information of the N equivalent ports at each second weight among the X second weights among the R second weights, where X is an integer greater than or equal to 1 and less than or equal to R.
  • the terminal device can also determine the channel state information of the N equivalent ports under each of the R second weights based on the R second weights and the channel information of the N first port groups. This enables the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and feed back the corresponding channel state information to the network device. This improves the efficiency of the network device in obtaining channel state information. There is no need for the terminal device to measure multiple reference signals, thereby reducing the power consumption loss of the terminal device.
  • the first channel state information includes a first PMI and X second PMIs
  • the first PMI is used to indicate the precoding matrix of the N equivalent ports under the first weight
  • the channel state information of the N equivalent ports under each second weight in the R second weights includes R second PMIs
  • the R second PMIs correspond to the R second weights one by one
  • one second PMI in the R second PMIs is used to indicate the precoding matrix of the N equivalent ports under the second weight corresponding to the second PMI
  • the X second PMIs belong to the R second PMIs.
  • the terminal device can report the first PMI and the X second PMIs, so as to facilitate the network device to determine the precoding matrix of the N equivalent ports under the corresponding weights.
  • the channel state information of the N equivalent ports under the first weight includes a first PMI, where the first PMI is used to indicate a precoding matrix of the N equivalent ports under the first weight;
  • the channel state information of the N equivalent ports at each second weight in the R second weights includes R second PMIs, the R second PMIs correspond one-to-one to the R second weights, and one second PMI in the R second PMIs is used to indicate the precoding matrix of the N equivalent ports at the second weight corresponding to the second PMI;
  • the first channel state information includes a third coefficient, X fourth coefficients and an index of a second basis; wherein the third coefficient is determined according to the precoding matrix of the N equivalent ports at the first weight and the second basis, the X fourth coefficients correspond one-to-one to the X second PMIs in the R second PMIs, and one fourth coefficient in the X fourth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the fourth coefficient and the second basis projection, and the second basis is a spatial domain basis, a frequency domain basis or a space-frequency joint basis.
  • the third system is obtained by projecting the precoding matrix of the N equivalent ports under the first weight onto the second basis.
  • One of the X fourth coefficients is obtained by projecting the precoding matrix indicated by the second PMI corresponding to the fourth coefficient onto the second basis. It can be seen that the second basis is a shared basis, thereby reducing the overhead reported by the terminal device.
  • the first channel state information further includes an eighth coefficient, an index of a third basis, X ninth coefficients, and indexes of basis corresponding to the X ninth coefficients respectively;
  • the eighth coefficient is determined according to the precoding matrix of the N equivalent ports under the first weight and the third basis, the X ninth coefficients correspond one-to-one to the X second PMIs, and one ninth coefficient among the X ninth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the ninth coefficient and the basis corresponding to the ninth coefficient; the third basis is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis, and the basis corresponding to the X ninth coefficients is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis.
  • the first channel state information also includes the eighth coefficient, the index of the third basis, X ninth coefficients, and the indexes of the basis corresponding to the X ninth coefficients, so that the network device can obtain the channel state information of N equivalent ports under various weights.
  • the method before the terminal device determines the channel information of the N first port groups according to the channel information of the multiple reference signal ports, the method further includes: the terminal device receives the first configuration information from the network device; the first configuration information is used to indicate the P second port groups, and the N first port groups are determined according to the preset rules and the P second port groups.
  • the terminal device can also configure the P second port groups. Thereby, it is convenient for the terminal device to determine the N first port groups based on the P second port groups.
  • the terminal device determines the channel information of N first port groups according to the channel information of multiple reference signal ports, including: the terminal device determines the channel information of P second port groups according to the first configuration information and the channel information of multiple reference signal ports; the terminal device determines the channel information of N first port groups according to a preset rule and the channel information of the P second port groups.
  • the terminal device can first determine the channel information of the P second port groups in combination with the first configuration information, and then determine the channel information of the N first port groups. This facilitates the implementation of the solution.
  • the method further includes: the terminal device receives first configuration information from the network device, the first configuration information is used to indicate P second port groups, and the N first port groups are determined based on the P second port groups.
  • the terminal device can also configure the P second port groups. This facilitates the terminal device to determine the N first port groups based on the P second port groups.
  • the terminal device determines N first port groups, including: the terminal device determines P second port groups according to the first configuration information; the terminal device determines N first port groups according to the preset rule and the P second port groups.
  • the terminal device can first determine the P second port groups in combination with the first configuration information, and then determine the N first port groups. This facilitates the implementation of the solution.
  • the method further includes: the network device sends first configuration information to the terminal device; the first configuration information is used to indicate P second port groups, and the N first port groups are determined based on the P second port groups. This facilitates the terminal device to determine the N first port groups based on the P second port groups.
  • the first configuration information includes the number of multiple reference signal ports and the code division multiplexing type adopted by the multiple reference signal ports; the value of P is any one of the following:
  • the relevant configuration of the reference signal included in the first configuration information is shown, and the value of P is indirectly indicated by the configuration of the reference signal.
  • the indication of the value of P is implemented, which is conducive to reducing the configuration overhead of the network device.
  • the reference signal ports in the P second port groups are obtained by evenly dividing multiple reference signal ports according to the port numbers of the reference signal ports from small to large based on the number of the P second port groups.
  • the method further includes: the terminal device receives second configuration information from the network device, and the second configuration information is used to configure the first weight.
  • the terminal device can receive the first weight configured from the network device, so as to facilitate the terminal device to determine the channel state information of the N equivalent ports under the first weight.
  • the method further includes: the network device sends second configuration information to the terminal device, the second configuration information is used to configure the first weight, so as to facilitate the terminal device to determine the channel state information of the N equivalent ports under the first weight.
  • the first weight is determined for the terminal device.
  • the terminal device can determine the first weight by itself, thereby reducing the indication overhead of the network device.
  • the first weight is a first codebook selected by the terminal device from a codebook set; and the method further includes:
  • the terminal device sends indication information to the network device, where the indication information is used to indicate the first codebook; or, the indication information is used to indicate the beam pointing corresponding to the first weight, where the beam pointing corresponding to the first weight is used by the network device to determine the first codebook.
  • the terminal device should also indicate the first weight to the network device, so that the network device can determine which weight corresponds to the channel state information reported by the terminal device.
  • the first weight is a first codebook selected by the terminal device from a codebook set; the method further includes: the network device receives indication information from the terminal device, the indication information is used to indicate the first codebook; or the indication information is used to indicate the beam pointing corresponding to the first weight, and the beam pointing corresponding to the first weight is used by the network device to determine the first codebook.
  • the terminal device determines the first weight by itself, the terminal device should also indicate the first weight to the network device. This facilitates the network device to determine which beam's channel state information corresponding to which weight the channel state information reported by the terminal device is.
  • a first part of the reference ports corresponds to a first polarization direction
  • a second part of the reference signal ports corresponds to a second polarization direction
  • the first part of the reference signal ports is the first half of the reference signal ports with smaller port numbers among the multiple reference signal ports
  • the second part of the reference signal ports is the second half of the reference signal ports with larger port numbers among the multiple reference signal ports.
  • the network device can load corresponding polarization directions on different reference signal ports, thereby realizing the measurement of channels with different polarization directions.
  • one equivalent port corresponds to one digital port, and different equivalent ports correspond to different digital ports.
  • each of the multiple reference signal ports corresponds to an analog port, and different reference signal ports correspond to different analog ports.
  • the first configuration information includes the number of multiple reference signal ports, the code division multiplexing type adopted by the multiple reference signal ports, and the fifth coefficient;
  • the value of P is any one of the following: the number of multiple reference signal ports divided by the sum of the number of reference signal ports using time domain code division indicated by the code division multiplexing type and the fifth coefficient; or, the number of reference signal ports using time domain code division indicated by the code division multiplexing type divided by the fifth coefficient; or, the number of multiple reference signal ports divided by the number of code division multiplexing groups, the number of code division multiplexing groups being equal to the number of multiple reference signal ports divided by the sum of the number of reference signal ports included in each code division multiplexing group indicated by the code division multiplexing type and the fifth coefficient; or, the number of code division multiplexing groups multiplied by the number of reference signal ports using time domain code division indicated by the code division multiplexing type and then divided by the fifth coefficient; or, the number of code division multiplexing groups divided
  • the relevant configuration of the reference signal included in the first configuration information is shown, and the value of P is indirectly indicated by the configuration of the reference signal.
  • the indication of the value of P is realized, which is conducive to reducing the configuration overhead of the network device.
  • the network device may not weight the port group composed of all the reference signal port groups in the analog domain. Therefore, the first configuration information may include a fifth coefficient for determining the number of the second port groups.
  • the first configuration information includes a sixth coefficient X, and the sixth coefficient is used to indicate that each of the P second port groups includes X reference signal ports, and the i-th second port group among the P second port groups includes X reference signal ports with consecutive port numbers starting from and including the X*i-th reference signal port among the multiple reference signal ports, i is an integer greater than or equal to 1 and less than or equal to P, and P is an integer greater than or equal to 1.
  • the first configuration information includes the sixth coefficient, and the reference signal ports included in each of the P second port groups are directly indicated by the sixth coefficient.
  • the first configuration information includes a seventh coefficient R, and the seventh coefficient R is used to indicate that the difference in port numbers of any two reference signal ports with adjacent port numbers included in each of the P second port groups is R, and the port number of the reference signal port in the i-th second port group among the P second port groups is an integer multiple of i-1, i is an integer greater than or equal to 1 and less than or equal to the P, and R is an integer greater than or equal to 1.
  • the first configuration information includes the seventh coefficient, and the reference signal port included in each of the P second port groups is directly indicated by the seventh coefficient.
  • a fifth aspect of the present application provides a first communication device, including:
  • a transceiver module used for receiving a reference signal from a network device, the reference signal corresponding to a plurality of reference signal ports;
  • a processing module is used to determine N first port groups according to multiple reference signal ports, the multiple reference signal ports include all reference signal ports of the N first port groups, different first port groups in the N first port groups include different reference signal ports, and N is an integer greater than or equal to 1; determine channel state information of N equivalent ports under the first weight according to the first weight and channel information of the N first port groups, and the N first port groups correspond to the N equivalent ports one by one.
  • the transceiver module is also used to send first channel state information to the network device, where the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • the channel information of the N first port groups is determined according to a reference signal.
  • a sixth aspect of the present application provides a first communication device, including:
  • a transceiver module configured to receive a reference signal from a second communication device, the reference signal corresponding to a plurality of reference signal ports;
  • a processing module configured to determine channel information of a plurality of reference signal ports according to a reference signal; determine channel information of N first port groups according to the channel information of the plurality of reference signal ports, wherein the plurality of reference signal ports include all reference signal ports of the N first port groups, and different first port groups in the N first port groups include different reference signal ports, where N is an integer greater than or equal to 1; determine channel state information of N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups, wherein the N first port groups correspond one to one to the N equivalent ports;
  • the transceiver module is also used to send first channel state information to the second communication device, where the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • a seventh aspect of the present application provides a second communication device, including:
  • a transceiver module is used to send a reference signal to a terminal device, the reference signal corresponds to multiple reference signal ports; receive first channel state information from the terminal device; wherein the first channel state information is determined based on the channel state information of N equivalent ports under a first weight, or the first channel state information includes the channel state information of N equivalent ports under the first weight; the channel state information of N equivalent ports under the first weight is determined based on the first weight and the channel information of N first port groups, the N first port groups correspond one-to-one to the N equivalent ports, the multiple reference signal ports include all reference signal ports of the N first port groups, different first port groups in the N first port groups include different reference signal ports, and N is an integer greater than or equal to 1.
  • channel information of the N first port groups is determined according to a reference signal.
  • An eighth aspect of the present application provides a second communication device, including:
  • a transceiver module is used to send a reference signal to a first communication device, the reference signal corresponds to multiple reference signal ports; receive first channel state information from the first communication device; wherein the first channel state information is determined based on the channel state information of N equivalent ports under a first weight, or the first channel state information includes the channel state information of N equivalent ports under the first weight; the channel state information of the N equivalent ports under the first weight is determined based on the first weight and the channel information of N first port groups, the N equivalent ports correspond one-to-one to the N equivalent ports, the channel information of the N first port groups is determined based on the channel information of multiple reference signal ports, the channel information of multiple reference signal ports is determined based on the reference signal, and N is an integer greater than or equal to 1.
  • the channel state information of N equivalent ports at a first weight includes a first PMI, and the first PMI is used to indicate the precoding matrix of the N equivalent ports at the first weight;
  • the first channel state information includes an index of a first basis and a first coefficient, and the first coefficient is determined based on the precoding matrix of the N equivalent ports at the first weight and the first basis, and the first basis is a spatial domain basis, a frequency domain basis, or a joint space-frequency basis.
  • the first channel state information includes an index of a frequency domain basis and a second coefficient corresponding to the precoding weights of M equivalent ports among N equivalent ports under the first weight, and the second coefficient is determined based on the precoding weights of the M equivalent ports under the first weight and the frequency domain basis, and M is greater than or equal to 1 and less than N.
  • the first channel state information also includes at least one of the following: a first CQI, a first RI; wherein the first CQI is used to indicate the channel quality corresponding to N equivalent ports under the first weight, and the first RI is used to indicate the rank of the channel corresponding to the N equivalent ports under the first weight.
  • the processing module is further used to:
  • Channel state information of the N equivalent ports at each second weight in the R second weights is determined according to the R second weights and the channel information of the N first port groups, where R is an integer greater than or equal to 1; the first channel state information is determined according to the channel state information of the N equivalent ports at the first weights and the channel state information of the N equivalent ports at each second weight in the R weights, where X is an integer greater than or equal to 1 and less than or equal to R.
  • the first channel state information includes a first PMI and X second PMIs, the first PMI is used to indicate the precoding matrix of N equivalent ports under the first weight;
  • the channel state information of the N equivalent ports under each second weight in the R second weights includes R second PMIs, the R second PMIs correspond one-to-one to the R second weights, and one second PMI among the R second PMIs is used to indicate the precoding matrix of the N equivalent ports under the second weight corresponding to the second PMI;
  • the X second PMIs belong to the R second PMIs.
  • the channels of the N equivalent ports under the first weight are
  • the state information includes a first PMI, where the first PMI is used to indicate a precoding matrix of the N equivalent ports under a first weight value;
  • the channel state information of the N equivalent ports at each second weight in the R second weights includes R second PMIs, the R second PMIs correspond one-to-one to the R second weights, and one second PMI in the R second PMIs is used to indicate the precoding matrix of the N equivalent ports at the second weight corresponding to the second PMI;
  • the first channel state information includes a third coefficient, X fourth coefficients and an index of a second basis; wherein the third coefficient is determined according to the precoding matrix of the N equivalent ports at the first weight and the second basis, the X fourth coefficients correspond one-to-one to the X second PMIs in the R second PMIs, and one fourth coefficient in the X fourth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the fourth coefficient and the second basis projection, and the second basis is a spatial domain basis, a frequency domain basis or a space-frequency joint basis.
  • the first channel state information further includes an eighth coefficient, an index of a third basis, X ninth coefficients, and indexes of basis corresponding to the X ninth coefficients respectively;
  • the eighth coefficient is determined according to the precoding matrix of the N equivalent ports under the first weight and the third basis, the X ninth coefficients correspond one-to-one to the X second PMIs, and one ninth coefficient among the X ninth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the ninth coefficient and the basis corresponding to the ninth coefficient; the third basis is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis, and the basis corresponding to the X ninth coefficients is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis.
  • the transceiver module is further used for:
  • First configuration information is received from a second communication device; the first configuration information is used to indicate P second port groups, and the N first port groups are determined according to the P second port groups.
  • the transceiver module is further used for:
  • First configuration information is sent to the first communication device; the first configuration information is used to indicate P second port groups, and the N first port groups are determined according to the P second port groups.
  • the processing module is specifically used to: determine P second port groups according to the first configuration information; and determine N first port groups according to the preset rule and the P second port groups.
  • the processing module is specifically used to: determine the channel information of P second port groups based on the first configuration information and the channel information of multiple reference signal ports; determine the channel information of N first port groups based on preset rules and the channel information of the P second port groups.
  • the first configuration information includes the number of multiple reference signal ports and the code division multiplexing type adopted by the multiple reference signal ports; the value of P is any one of the following:
  • the reference signal ports in the P second port groups are obtained by evenly dividing multiple reference signal ports according to the port numbers of the reference signal ports from small to large based on the number of the P second port groups.
  • the transceiver module is further used to: receive second configuration information from a second communication device, where the second configuration information is used to configure the first weight.
  • the transceiver module is further used to: send second configuration information to the first communication device, where the second configuration information is used to configure the first weight.
  • the first weight is determined for the first communication device.
  • the first weight is a first codebook selected by the first communication device from a codebook set; the transceiver module is also used to: send indication information to the second communication device, the indication information is used to indicate the first codebook; or, the indication information is used to indicate the beam pointing corresponding to the first weight, and the beam pointing corresponding to the first weight is used by the second communication device to determine the first codebook.
  • the first weight is a first codebook selected by the first communication device from a codebook set; the transceiver module is also used to: receive indication information from the first communication device, the indication information is used to indicate the first codebook; or, the indication information is used to indicate a beam pointing corresponding to the first weight, and the beam pointing corresponding to the first weight is used by the second communication device to determine the first codebook.
  • the first part of the reference signal ports correspond to the first polarization direction
  • the second part of the reference signal ports correspond to the second polarization direction; wherein the first part of the reference signal ports are the first half of the reference signal ports with smaller port numbers among the multiple reference signal ports, and the second part of the reference signal ports are the second half of the reference signal ports with larger port numbers among the multiple reference signal ports.
  • one equivalent port corresponds to one digital port, and different equivalent ports correspond to different digital ports.
  • each of the multiple reference signal ports corresponds to an analog port, and different reference signal ports correspond to different analog ports.
  • the first configuration information includes the number of multiple reference signal ports, the code division multiplexing type adopted by the multiple reference signal ports, and the fifth coefficient;
  • the value of P is any one of the following: the number of multiple reference signal ports divided by the sum of the number of reference signal ports adopting time domain code division indicated by the code division multiplexing type and the fifth coefficient; or, the number of reference signal ports adopting time domain code division indicated by the code division multiplexing type divided by the fifth coefficient; or, the number of multiple reference signal ports divided by the number of code division multiplexing groups, the number of code division multiplexing groups is equal to the number of multiple reference signal ports divided by the sum of the number of reference signal ports included in each code division multiplexing group indicated by the code division multiplexing type and the fifth coefficient; or, the number of code division multiplexing groups multiplied by the number of reference signal ports adopting time domain code division indicated by the code division multiplexing type and then divided by the fifth coefficient; or, the number of code division multiplexing groups
  • the first configuration information includes a sixth coefficient X
  • the sixth coefficient is used to indicate that each of the P second port groups includes X reference signal ports
  • the i-th second port group among the P second port groups includes X reference signal ports with consecutive port numbers starting from and including the X*i-th reference signal port among the multiple reference signal ports
  • i is an integer greater than or equal to 1 and less than or equal to P
  • P is an integer greater than or equal to 1.
  • the first configuration information includes a seventh coefficient R
  • the seventh coefficient R is used to indicate that the difference between the port numbers of any two reference signal ports with adjacent port numbers in each of the P second port groups is R, and the port number of the reference signal port in the i-th second port group among the P second port groups is an integer multiple of i-1, i is an integer greater than or equal to 1 and less than or equal to the P, and R is an integer greater than or equal to 1.
  • the present application provides a communication device, the communication device comprising a processor, wherein the processor is used to call and run a computer program stored in a memory, so that the processor implements any one of the implementation methods in any one of the first to fourth aspects.
  • the communication device also includes a transceiver; the processor is also used to control the transceiver to send and receive signals.
  • the communication device includes a memory in which a computer program is stored.
  • the tenth aspect of the present application provides a computer program product comprising instructions, characterized in that when the computer program product is run on a computer, the computer is enabled to execute any implementation method of any one of the first to fourth aspects.
  • a computer-readable storage medium comprising computer instructions, which, when executed on a computer, enable the computer to execute any one of the implementation methods in any one of the first to fourth aspects.
  • the twelfth aspect of the present application provides a chip device, including a processor, which is used to connect to a memory and call a program stored in the memory so that the processor executes any implementation method of any one of the first to fourth aspects above.
  • the thirteenth aspect of the present application provides a communication system, which includes the first communication device as shown in the fifth aspect and the second communication device as shown in the sixth aspect, or the communication system includes the first communication device as shown in the seventh aspect and the second communication device as shown in the eighth aspect.
  • the terminal device receives a reference signal from the network device, and the reference signal corresponds to multiple reference signal ports.
  • the terminal device determines N first port groups according to the multiple reference signal ports, and the multiple reference signal ports include all reference signal ports of the N first port groups.
  • the reference signal ports included in different first port groups in the N first port groups are different, and N is an integer greater than or equal to 1; the terminal device determines the channel state information of the N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups, and the N first port groups correspond to the N equivalent ports one by one; the terminal device sends the first channel state information to the network device, and the first channel state information is determined according to the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight. It can be seen from this that the terminal device determines the channel state information of the N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups.
  • the channel information of the N first port groups is more complete channel information.
  • the terminal device can determine the N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups.
  • the channel state information of the beam corresponding to the first weight is obtained by the terminal device.
  • the terminal device can obtain more complete channel information based on the reference signal. It is beneficial for the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and to feed back the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining channel state information.
  • FIG1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG2 is another schematic diagram of a communication system according to an embodiment of the present application.
  • FIG3 is a schematic diagram of a structure of a DBF architecture according to an embodiment of the present application.
  • FIG4 is a schematic diagram of a structure of an ABF architecture according to an embodiment of the present application.
  • FIG5 is a schematic diagram of a first structural example of the HBF architecture of the present application.
  • FIG6 is a schematic diagram of a second structure of the HBF architecture according to an embodiment of the present application.
  • FIG7a is a schematic diagram of a network device sending a reference signal through beam 1 according to an embodiment of the present application
  • FIG7b is a schematic diagram of a network device sending a reference signal through beam 2 according to an embodiment of the present application
  • FIG7c is a schematic diagram of a network device sending a reference signal through beam 3 according to an embodiment of the present application.
  • FIG8 is a schematic diagram of an embodiment of a method for sending channel state information and a method for receiving channel state information according to an embodiment of the present application
  • FIG9 is a schematic diagram of a third structure of the HBF architecture according to an embodiment of the present application.
  • FIG10 is a schematic diagram of orthogonal codes loaded on eight reference signal ports according to an embodiment of the present application.
  • FIG11a is a schematic diagram of a first scenario of a channel state information sending method and a channel state information receiving method according to an embodiment of the present application;
  • FIG. 11b is a schematic diagram of a second scenario of a channel state information sending method and a channel state information receiving method according to an embodiment of the present application;
  • FIG. 11c is a schematic diagram of a third scenario of the channel state information sending method and the channel state information receiving method according to an embodiment of the present application.
  • FIG12 is a schematic diagram of a first structure of a communication device according to an embodiment of the present application.
  • FIG13 is a schematic diagram of a second structure of a communication device according to an embodiment of the present application.
  • FIG14 is a schematic diagram of a third structure of a communication device according to an embodiment of the present application.
  • FIG15 is a schematic diagram of a fourth structure of a communication device according to an embodiment of the present application.
  • FIG16 is a fifth structural diagram of the communication device according to an embodiment of the present application.
  • Embodiments of the present application provide a channel state information sending method, a channel state information receiving method and an apparatus, which are used to improve the efficiency of a network device in acquiring channel state information.
  • references to "one embodiment” or “some embodiments” etc. described in this application mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application.
  • the phrases “in one embodiment”, “in some embodiments”, “in some other embodiments”, “in some other embodiments”, etc. that appear at different places in this specification do not necessarily all refer to the same embodiment, but mean “one or more but not all embodiments", unless otherwise specifically emphasized in other ways.
  • the terms “including”, “comprising”, “having” and their variations all mean “including but not limited to”, unless otherwise specifically emphasized in other ways.
  • At least one of a, b, or c can mean: a, b, c; a and b; a and c; b and c; or a, b, and c.
  • a, b, and c can be single or multiple.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile communication system (universal mobile
  • the 5G network may include mobile telecommunication system (UMTS), mobile communication systems after 5G network (for example, 6G mobile communication system), vehicle to everything (V2X) communication system, etc.
  • UMTS mobile telecommunication system
  • 6G mobile communication system for example, 6G mobile communication system
  • V2X vehicle to everything
  • the communication system to which the present application is applicable includes terminal equipment and network equipment.
  • the terminal equipment and network equipment of the present application are introduced below.
  • the terminal device may be a wireless terminal device capable of receiving network device scheduling and indication information.
  • the wireless terminal device may be a device that provides voice and/or data connectivity to a user, or a handheld device with wireless connection function, or other processing device connected to a wireless modem.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), customer-premises equipment (CPE), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • CPE customer-premises equipment
  • terminal devices are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in Internet of Vehicles, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes.
  • MID mobile internet devices
  • VR virtual reality
  • AR augmented reality
  • wireless terminals in Internet of Vehicles can be vehicle-mounted equipment, vehicle equipment, vehicle-mounted modules, vehicles, etc.
  • Wireless terminals in industrial control can be cameras, robots, etc.
  • Wireless terminals in smart homes can be televisions, air conditioners, sweepers, speakers, set-top boxes, etc.
  • a network device can be a device in a wireless network.
  • a network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices.
  • a network device can be a radio access network (RAN) node that connects terminal devices to a wireless network, and can also be called an access network device.
  • RAN radio access network
  • Network equipment includes, but is not limited to: base transceiver stations (BTS) in the global system for mobile communications (GSM) and code division multiple access (CDMA) networks, and Node B (NB) in wideband code division multiple access (WCDMA); it can also be evolved Node B (eNB), radio network controller (RNC), NB, base station controller
  • the network device may be a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., and may also be a network device in a 5G mobile communication system.
  • BSC base station controller
  • BTS base transceiver station
  • HNB home NodeB
  • BBU baseband unit
  • a next generation NodeB gNB
  • TRP transmission reception point
  • TP transmission point
  • NR new radio
  • the network device may also be a network node constituting a gNB or a transmission point.
  • BBU baseband unit
  • DU distributed unit
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • AAU active antenna unit
  • the CU implements some functions of the gNB
  • the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • the DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas.
  • the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer. Therefore, under this architecture, high-level signaling (such as RRC layer signaling) can also be considered to be sent by the DU, or by the DU and the AAU.
  • the network device can be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into a network device in the access network (RAN), or the CU can be divided into a network device in the core network (CN), and this application does not limit this.
  • FIG1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • the communication system includes at least one network device and at least one terminal device.
  • network device 100 As shown in FIG1 , network device 100, terminal device 101, and terminal device 102.
  • Network device 100 can communicate and transmit with terminal device 101 and terminal device 102, respectively.
  • FIG2 is another schematic diagram of a communication system according to an embodiment of the present application.
  • the communication system includes at least one network device and at least one terminal device.
  • terminal device 201 As shown in FIG2 , terminal device 201, network device 202, network device 203, and network device 204.
  • Terminal device 201 can communicate with multiple network devices, so that multiple network devices can provide communication services for one terminal device.
  • network devices In communication systems, network devices usually use large-scale antenna arrays to transmit signals. Network devices use higher antenna array gain to counteract path loss caused by higher frequency bands and improve coverage. From the perspective of the implementation of network devices, beamforming can be roughly divided into three array weighting methods according to the implementation scheme, namely DBF, ABF and HBF.
  • the following introduces the DBF architecture, ABF architecture, and HBF architecture respectively.
  • FIG3 is a schematic diagram of the structure of the DBF architecture of an embodiment of the present application. Please refer to FIG3.
  • each antenna unit or each group of antenna units is connected to a digital-to-analog converter, and a digital-to-analog converter is connected to a digital port.
  • the antenna unit includes a transmitting antenna.
  • the network device weights the antenna signal on each digital port in the digital domain. For example, as shown in FIG3, the network device converts the digital domain signal on the digital port 0 into an analog domain signal through the digital-to-analog converter 1, and then sends the weighted analog domain signal through an antenna unit or a group of antenna units connected to the digital-to-analog converter 1.
  • the architecture shown in FIG3 can be applied to low-frequency communication systems.
  • FIG4 is a schematic diagram of the structure of the ABF architecture of the embodiment of the present application.
  • each antenna unit or each group of antenna units is connected to a phase shifter.
  • the antenna unit includes a transmitting antenna.
  • the phase shifters connected to multiple or multiple groups of antenna units are connected in parallel to a digital-to-analog converter. That is, the antenna array corresponds to only one digital-to-analog converter, and the digital-to-analog converter corresponds to one digital port.
  • each phase shifter should be configured with a corresponding weight.
  • the signal output by the digital-to-analog converter is weighted by the shifter and then transmitted through the corresponding antenna unit.
  • the signal transmitted by the corresponding antenna unit is the signal in the beam direction after beamforming.
  • the beam direction after beamforming points to the target terminal device.
  • FIG5 is a schematic diagram of a structure of the HBF architecture of the embodiment of the present application.
  • the HBF architecture includes multiple digital ports.
  • FIG5 takes the DBF architecture including three digital ports (digital port 0 to digital port 3) as an example for introduction. As shown in FIG5,
  • Each antenna unit or each group of antenna units is connected to a phase shifter.
  • the antenna unit includes a transmitting antenna.
  • phase shifter 1 and phase shifter 2 are connected in parallel to digital-to-analog converter 1.
  • Phase shifter 3 and phase shifter 4 are connected in parallel to digital-to-analog converter 2.
  • Phase shifter 5 and phase shifter 6 are connected in parallel to digital-to-analog converter 3.
  • the first antenna unit or the first group of antenna units and the second antenna unit or the second group of antenna units constitute antenna subarray 1.
  • the third antenna unit or the third group of antenna units and the fourth antenna unit or the fourth group of antenna units constitute antenna subarray 2.
  • the fifth antenna unit or the fifth group of antenna units and the sixth antenna unit or the sixth group of antenna units constitute antenna subarray 3.
  • Each digital port corresponds to two phase shifters. As can be seen from Figure 5, each digital port drives an antenna subarray. For example, digital port 0 drives antenna subarray 1, digital port 2 drives antenna subarray 2, and digital port 3 drives antenna subarray 3.
  • digital port 0 drives antenna subarray 1
  • digital port 2 drives antenna subarray 2
  • digital port 3 drives antenna subarray 3.
  • the size of the antenna subarray driven by each digital port is larger. Therefore, the beam corresponding to the signal obtained by the network device through the weighted two phase shifters corresponding to the digital port is wider, has better reliability, and has smaller beam scanning overhead.
  • the ratio between digital ports and phase shifters is determined according to the frequency band adopted by the communication system and the system design requirements.
  • the number of digital ports can be small (for example, the number of digital ports can be 4 to 16), and each digital port corresponds to more phase shifters (for example, each digital port corresponds to 16 to 32 phase shifters).
  • the number of digital ports can be large (for example, the number of digital ports can be 32 to 128), and each digital port corresponds to fewer phase shifters (for example, each digital port corresponds to 2 to 10 phase shifters).
  • FIG6 is another structural diagram of the HBF architecture of the embodiment of the present application.
  • the network device can reduce the dimension of the digital port by reducing the dimension.
  • the network device can convert digital port 0 to digital port 5 into three reduced-dimensional digital ports by reducing the dimension.
  • the three reduced-dimensional digital ports are respectively connected to a digital-to-analog converter.
  • a digital-to-analog converter may correspond to one or more digital ports.
  • each digital-to-analog converter corresponds to one digital port.
  • each digital-to-analog converter corresponds to two digital ports.
  • phase shifters connected to each digital port one or more phase shifters correspond to one analog port.
  • the port is called the analog port corresponding to the digital port.
  • Each analog port corresponds to a reference signal port, and different analog ports correspond to different reference signal ports. That is, the network device maps each reference signal port in multiple reference signal ports to the corresponding analog port.
  • One digital port corresponds to at least two analog ports, or one digital port corresponds to at least two reference signal ports.
  • the multiple reference signal ports are reference signal port 0 to reference signal port 5.
  • Digital port 0 corresponds to reference signal port 0 and reference signal port 1.
  • Digital port 1 corresponds to reference signal port 2 and reference signal port 3.
  • Digital port 2 corresponds to reference signal port 4 and reference signal port 5.
  • the network device virtualizes phase shifter 1, phase shifter 2, and phase shifter 3 as analog port 1, and virtualizes phase shifter 4, phase shifter 5, and phase shifter 6 as analog port 2. That is, three phase shifters correspond to one analog port.
  • the digital ports described in FIG4 correspond to the analog port 1 and the analog port 2.
  • the signal quality of communication between devices is better only when the beam is aimed at the communication target (ie, the target terminal device).
  • the process of the network device selecting a beam for the terminal device can be called beam scanning or beam training.
  • Beam scanning is a process in which the network device uses different beams to send reference signals respectively, and the terminal device measures the reference signals respectively and feeds back the measurement results. This helps the network device determine the beam with the best signal quality and selects the beam with the best signal quality for communication transmission between the network device and the terminal device.
  • the network device sends a reference signal through beam 1.
  • the terminal device obtains the channel state information of beam 1 through the reference signal measurement.
  • the network device sends a reference signal through beam 2.
  • the terminal device obtains the channel state information of beam 2 through the reference signal measurement.
  • the network device sends a reference signal through beam 3.
  • the terminal device obtains the channel state information of beam 3 through the reference signal measurement.
  • the network device needs to send a corresponding reference signal separately.
  • the terminal device measures the reference signal on each beam and feeds back the corresponding channel state information. That is, the network device can only select one beam and send the corresponding reference signal at the same time.
  • the reference signals of different beams can only be sent in a time-division manner. This results in low efficiency of the network device in obtaining channel state information.
  • the network device needs to be configured with multiple resources, each resource corresponding to a beam.
  • the terminal device measures each resource and feeds back corresponding channel state information.
  • the network device needs to be configured with multiple resources, resulting in large resource overhead.
  • the network device needs to send reference signals on multiple resources respectively. That is, the network device needs to send reference signals multiple times. As a result, the network device sends more times, resulting in more transmission energy consumption.
  • the terminal device needs to measure on multiple resources respectively and feed back the corresponding channel state information respectively. This results in a large number of measurements for the terminal device, resulting in a large power consumption loss for the terminal device.
  • the terminal device needs to report the channel state information measured on multiple resources respectively, resulting in a large feedback overhead for the terminal device.
  • the present application provides a corresponding technical solution for improving the efficiency of network devices in acquiring channel state information. Further, it is used to reduce the overhead of measurement resources and feedback overhead, reduce the number of measurements of terminal devices, and reduce the power consumption loss of terminal devices. For details, please refer to the relevant introduction of the embodiment shown in Figure 8 below.
  • a beam is a communication resource.
  • a beam can be a wide beam, a narrow beam, or other types of beams.
  • the technology used to form the beam can be beamforming technology or other technical means.
  • Beamforming technology can specifically include digital beamforming technology, analog beamforming technology, and hybrid digital/analog beamforming technology. Different beams can be considered as different resources.
  • a beam may be referred to as a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial parameter, a spatial domain setting, a spatial setting, quasi-colocation (QCL) information, a QCL assumption, or a QCL indication, etc.
  • a beam may be indicated by a TCI-state parameter or by a spatial relation parameter.
  • a beam may be replaced by a spatial filter, a spatial filter, a spatial parameter, a spatial parameter, a spatial setting, a spatial setting, a QCL information, a QCL assumption, a QCL indication, a transmission configuration indicator (TCI) state (also referred to as TCI-state, specifically including uplink TCI-state, downlink TCI-state), or a spatial relation, etc.
  • TCI transmission configuration indicator
  • beam may also be replaced by other terms for representing the beam, which is not limited in the present application. In this document, the two descriptions TCI state and TCI-state may be replaced with each other.
  • the beam used to transmit a signal can be called a transmission beam (Tx beam), a spatial domain transmission filter, a spatial transmission filter, or a spatial transmission parameter. (spatial domain transmission parameter), spatial transmission parameter, spatial domain transmission setting, or spatial transmission setting.
  • Tx beam transmission beam
  • spatial domain transmission parameter spatial transmission parameter
  • spatial domain transmission setting spatial transmission setting
  • the transmit beam may be indicated by TCI-state.
  • the beam used to receive the signal may be referred to as a reception beam (Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter or a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting.
  • a reception beam Rx beam
  • a spatial domain reception filter a spatial domain reception filter
  • a spatial domain reception parameter or a spatial reception parameter a spatial domain reception setting
  • a spatial domain reception setting a spatial domain reception setting
  • Both the transmit beam and the receive beam can be indicated by any one of the spatial relationship, the transmission configuration indicator (TCI) state, and the sounding reference signal (SRS) resource (indicating the transmit beam using the SRS). Therefore, the transmit beam can also be replaced by the SRS resource.
  • TCI transmission configuration indicator
  • SRS sounding reference signal
  • the transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna
  • the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.
  • the beam may be a wide beam, a narrow beam, or other types of beams.
  • the technology for forming the beam may be a beamforming technology or other technologies.
  • the beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, a hybrid digital beamforming technology, or a hybrid analog beamforming technology.
  • Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources. The terminal device feeds back the measured resource quality, and the network device knows the quality of the corresponding beam. When data is transmitted, beam information is also indicated through its corresponding resources. For example, the network device indicates the information of the beam used to transmit the physical downlink shared channel (PDSCH) of the terminal device through the TCI field in the downlink control information (DCI).
  • PDSCH physical downlink shared channel
  • DCI downlink control information
  • One beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals.
  • One or more antenna ports forming a beam may also be considered as an antenna port set.
  • a resource is a configuration information unit, including the relevant parameters of a reference signal. For example, the transmission period, the time-frequency resource position used, etc.
  • Each beam corresponds to a resource, and the network device sends the reference signal corresponding to the resource through the beam corresponding to the resource.
  • the terminal device can determine the quality of the beam or the resource by measuring the reference signal. Therefore, in beam measurement, the beam corresponding to the resource can be uniquely identified by the resource index.
  • a resource can be a resource for an uplink signal or a resource for a downlink signal.
  • a resource is a data structure, including relevant parameters of its corresponding uplink signal or downlink signal.
  • resources include the type of uplink signal, the resource element carrying the uplink signal, the transmission time and period of the uplink channel, and the port used to send the uplink signal.
  • resources include the type of downlink signal, the resource element carrying the downlink signal, the transmission time and period of the downlink signal, and the number of ports used to send the downlink signal.
  • Each resource of an uplink signal or each resource of a downlink signal has a unique index for identifying the resource. It can be understood that the index of a resource can also be referred to as an identifier of a resource, and the embodiments of the present application do not impose any restrictions on this.
  • Channel state information In a wireless communication system, information reported by the receiving end (such as a terminal device) to the transmitting end (such as a network device) to describe the channel properties of the wireless communication link between the transmitting end and the receiving end.
  • CSI may include, but is not limited to, precoding matrix indicator (PMI), rank indicator (RI), channel quality indicator (CQI), channel state information reference signal (CSI-RS resource indicator, CRI) and layer indicator (LI).
  • PMI precoding matrix indicator
  • RI rank indicator
  • CQI channel quality indicator
  • CRI channel state information reference signal
  • CRI channel state information reference signal
  • LI layer indicator
  • the channel matrix may be determined by the terminal device through channel estimation or based on channel reciprocity.
  • the specific method for the terminal device to determine the precoding matrix is not limited to the method described above, and will not be listed here one by one.
  • the precoding matrix can be obtained by performing singular value decomposition (SVD) on the channel matrix or the covariance matrix of the channel matrix, or by performing eigenvalue decomposition (EVD) on the covariance matrix of the channel matrix.
  • SVD singular value decomposition
  • EVD eigenvalue decomposition
  • the precoding matrix can be used directly for downlink data transmission; it can also be subjected to some beamforming methods, such as zero forcing (ZF), regularized zero-forcing (RZF), minimum mean-squared error (MMSE), maximizing signal-to-leakage-and-noise (SLNR), etc., to obtain the final precoding matrix used for downlink data transmission.
  • ZF zero forcing
  • RZF regularized zero-forcing
  • MMSE minimum mean-squared error
  • SLNR signal-to-leakage-and-noise
  • the precoding matrix referred to below may refer to the precoding matrix determined based on the method provided in this application.
  • the precoding matrix determined by the terminal device can be understood as the precoding matrix to be fed back.
  • the terminal device can indicate the precoding matrix to be fed back through the PMI, so that the network device can recover the precoding matrix based on the PMI.
  • the precoding matrix recovered by the network device based on the PMI can be the same as or similar to the precoding matrix to be fed back.
  • Antenna port It can be understood as a transmitting antenna that can be recognized by a receiving device, or a receiving antenna that can be recognized by a transmitting device; or, a transmitting antenna or a receiving antenna that can be distinguished in space, which can be called a physical antenna here.
  • a reference signal port can be understood as a virtual antenna or a logical antenna, which can be a weighted combination of multiple physical antennas, and its weight coefficient is related to the precoding matrix loaded on the reference signal. If the precoding matrix loaded on the reference signal can be a unit matrix, then an antenna port is configured for each virtual antenna, each virtual antenna corresponds to a physical antenna, and each antenna port can correspond to a reference signal or a reference signal port. If the precoding matrix loaded on the reference signal is not a unit matrix, then multiple antenna ports are configured for a virtual antenna, one virtual antenna corresponds to multiple physical antennas, and multiple antenna ports can correspond to a reference signal or a reference signal port. For example, if the reference signal is CSI-RS, then the reference signal port can be called a CSI-RS port; if the reference signal is a demodulation reference signal (DMRS), then the reference signal port can be called a DMRS port.
  • CSI-RS the reference signal port can be called a CSI-RS port
  • DMRS de
  • Frequency domain unit The unit of frequency domain resources, which can represent different frequency domain resource granularities.
  • Frequency domain units may include, but are not limited to, a subband, a resource block (RB), a subcarrier, a resource block group (RBG), or a precoding resource block group (PRG).
  • Spatial basis vector It can also be called beam vector, spatial vector, spatial beam basis vector.
  • One or more spatial basis vectors constitute the spatial basis.
  • Each spatial basis vector corresponds to a transmit beam of the transmitting device, and each element in the spatial basis vector can be represented as the weight of each antenna port. Based on the weights of each antenna port represented by each element in the spatial basis vector, the signals of each antenna port are linearly superimposed to form an area with a strong signal in a certain direction in space.
  • the spatial basis vector is taken from a two-dimensional discrete Fourier transform (DFT) matrix.
  • Each column vector in the two-dimensional DFT matrix can be called a two-dimensional DFT vector.
  • the spatial basis vector can be a two-dimensional DFT vector, which can usually be used to describe a beam formed by the superposition of a horizontal beam and a vertical beam.
  • Spatial basis composed of one or more spatial basis vectors.
  • Frequency domain basis vector It can also be called frequency domain vector, which is a vector that can be used to represent the change law of the channel in the frequency domain.
  • One or more frequency domain basis vectors constitute the frequency domain basis.
  • Each frequency domain basis vector can represent a change law. Since the signal can reach the receiving antenna from the transmitting antenna through multiple paths when it is transmitted through the wireless channel. Multipath delay causes frequency selective fading, which is the change of the frequency domain channel. Therefore, different frequency domain basis vectors can be used to represent the change law of the channel in the frequency domain caused by delays on different transmission paths.
  • the frequency domain basis vector can select the DFT matrix or the inverse discrete Fourier transform (IDFT) matrix. (That is, the conjugate transpose matrix of the DFT matrix).
  • IDFT inverse discrete Fourier transform
  • the length of the frequency domain basis vector may be determined by the number of frequency domain units to be reported preconfigured in the reporting bandwidth, or by the length of the reporting bandwidth, or may be a protocol predefined value. This application does not limit the length of the frequency domain basis vector.
  • the reporting bandwidth may refer to the CSI reporting bandwidth (CSI-ReportingBand) carried in the CSI reporting configuration in the high-level signaling (e.g., RRC message).
  • Frequency domain basis composed of one or more frequency domain basis vectors.
  • Space-frequency basis vector It is uniquely determined by a space-domain basis vector and a frequency-domain basis vector.
  • a space-frequency basis vector can be a vector formed by a space-domain basis vector and a frequency-domain basis vector through the Kronecker product. If the transmitting antenna of the network device It is a single-polarized antenna, and the number of rows of a space-frequency basis vector is (M1 ⁇ M2) ⁇ Nf and the number of columns is 1, or the number of rows is 1 and the number of columns is (M1 ⁇ M2) ⁇ Nf. Where M1 is the number of transmitting antenna ports of the network device in the horizontal direction, M2 is the number of transmitting antenna ports of the network device in the vertical direction, and Nf is the number of frequency domain units.
  • the transmitting antenna of the network device is a dual-polarized antenna
  • the number of rows of a space-frequency basis vector is 2 ⁇ (M1 ⁇ M2) ⁇ Nf and the number of columns is 1, or the number of rows is 1 and the number of columns is 2 ⁇ (M1 ⁇ M2) ⁇ Nf.
  • Space-frequency joint basis composed of one or more space-frequency basis vectors.
  • Reference signal configuration information including relevant parameters of the reference signal, such as the reference signal transmission period, transmission time, time-frequency resources used, reference signal type, number of reference signal ports used to transmit the reference signal, code division multiplexing type, code division multiplexing group time-frequency information, code division multiplexing group index, frequency domain resource index information within the code division multiplexing group, time domain resource index information within the code division multiplexing group, etc.
  • a T Represented as the transpose of matrix A.
  • a H Represented as the conjugate transpose of matrix A.
  • noCDM which means no code division multiplexing.
  • Frequency domain code division denoted as -FD#, or fd-CDM#, # is a number, indicating that there are # reference signal ports coded in the frequency domain in a code division multiplexing (CDM) group.
  • CDM code division multiplexing
  • Time domain code division denoted as -TD#, or td-CDM#, where # is a number, indicating that there are # reference signal ports in a CDM group that are code-divided in the time domain.
  • cdm-FD2-TD2 indicates that a CDM group includes four reference signal ports, of which the orthogonal codes on two reference signal ports are code-divided in the frequency domain, and the orthogonal codes on two reference signal ports are code-divided in the time domain.
  • FIG8 is a schematic diagram of an embodiment of a method for sending channel state information and a method for receiving channel state information according to an embodiment of the present application.
  • the method includes:
  • a network device sends a reference signal to a terminal device, where the reference signal corresponds to multiple reference signal ports.
  • the terminal device receives the reference signal from the network device.
  • the multiple reference signal ports are configured in the configuration information of the reference signal.
  • the network device may send the reference signal through the multiple reference signal ports.
  • the network device may send the configuration information of the reference signal to the terminal device, so as to facilitate the terminal device to receive the reference signal.
  • each of the multiple reference signal ports corresponds to an analog port, and different reference signal ports correspond to different analog ports.
  • a digital port corresponds to at least two reference signal ports, and different digital ports correspond to different reference signal ports.
  • a digital signal on a digital port can be weighted by the at least two reference signal ports to obtain a signal in the beam direction of beamforming.
  • the reference signal is sent in all dimensional directions.
  • the network device can send the reference signal in all dimensional directions. This enables the terminal device to obtain more complete channel information.
  • the network device can map each reference signal port in multiple reference signal ports to an analog port, and different reference signal ports are mapped to different analog ports. This facilitates the terminal device to obtain the channel information on each analog port. That is, the channel information on each reference signal port.
  • the reference signal corresponds to eight reference signal ports, namely reference signal port 0 to reference signal port 7.
  • the network device processes the signals on the reference signal ports using the code division multiplexing type of cdm4-FD2-TD2.
  • cdm 4-FD2-TD2 indicates that there are 4 reference signal ports in a CDM group, two of which are code-division orthogonal in the frequency domain, and two of which are code-division orthogonal in the time domain.
  • the network device uses the orthogonal code corresponding to each reference signal port as the weight of the phase shifter connected to the reference port, and performs weighted processing on the signals on the pair of reference signal ports through the phase shifter.
  • the orthogonal code corresponding to reference signal port 0 and the orthogonal code corresponding to reference signal port 1 are code-division orthogonal in the time domain.
  • the orthogonal codes corresponding to reference signal port 2 are code-division orthogonal in the frequency domain.
  • the orthogonal code corresponding to reference signal port 2 is code-division orthogonal with the orthogonal code corresponding to reference signal port 3 in the frequency domain.
  • the orthogonal code corresponding to reference signal port 4 is code-division orthogonal with the orthogonal code corresponding to reference signal port 5 in the time domain.
  • the orthogonal code corresponding to reference signal port 4 is code-division orthogonal with the orthogonal code corresponding to reference signal port 6 in the frequency domain.
  • the orthogonal code corresponding to reference signal port 6 is code-division orthogonal with the orthogonal code corresponding to reference signal port 7 in the frequency domain. That is, in the reference signal port corresponding to the same digital port, the orthogonal codes corresponding to different reference signal ports are code-division orthogonal in the time domain.
  • the network device can map each reference signal port in multiple reference signal ports to an analog port. Furthermore, after the terminal device receives the reference signal, the terminal device can obtain the channel information on each reference signal port by parsing the orthogonal code of each reference signal port.
  • the reference signal is a CSI-RS or a DMRS. If the reference signal is a CSI-RS, the reference signal port may be referred to as a CSI-RS port. If the reference signal is a DMRS, the reference signal port may be referred to as a DMRS port.
  • a first part of the reference signal ports corresponds to a first polarization direction
  • a second part of the reference signal ports corresponds to a second polarization direction
  • the first part of the reference signal ports is the first half of the reference signal ports with smaller port numbers among the multiple reference signal ports
  • the second part of the reference signal ports is the second half of the reference signal ports with larger port numbers among the multiple reference signal ports.
  • the first part of the reference signal ports includes reference signal port 0 to reference signal port 3.
  • the second part of the reference signal ports includes reference signal port 4 to reference signal port 7.
  • the network device sends reference signals through reference signal port 0 to reference signal port 3 in the first polarization direction, and sends reference signals through reference signal port 4 to reference signal port 7 in the second polarization direction. This enables the terminal device to measure channels in different polarization directions.
  • first part of the reference signal ports and the second part of the reference signal ports can also be obtained by dividing multiple reference signal ports in other ways.
  • the above examples do not limit the present application, and the present application does not limit them.
  • the first part of the reference signal ports are the reference signal ports with odd port numbers among the multiple reference signal ports.
  • the second part of the reference signal ports are the reference signal ports with even port numbers among the multiple reference signal ports.
  • the terminal device determines channel information of multiple reference signal ports according to a reference signal.
  • the terminal device may determine the channel information of the multiple reference signal ports through the orthogonal code corresponding to each reference signal port in the multiple reference signal ports and the reference signal.
  • the terminal device multiplies the received reference signal by the orthogonal code of the reference signal port 0 to obtain the channel information of the reference signal port 0.
  • the channel information of other reference signal ports is similar, and the terminal device can determine the channel information of each reference signal port.
  • the terminal device determines channel information of N first port groups according to channel information of multiple reference signal ports.
  • the plurality of reference signal ports include all reference signal ports in the N first port groups. Different first port groups in the N first port groups include different reference signal ports. N is an integer greater than or equal to 1.
  • all reference signal ports in the N first port groups may be the multiple reference signal ports or a proper subset of the multiple reference signal ports. This application does not make any specific limitation.
  • each of the N first port groups corresponds to one or more digital ports, and the one or more digital ports correspond to the same digital-to-analog converter.
  • the N first port groups include three first port groups, wherein the first first port group includes reference signal port 0 and reference signal port 1, the second first port group includes reference signal port 2 and reference signal port 3, and the third first port group includes reference signal port 4 and reference signal port 5.
  • the N first port groups can also be determined by the terminal device, and the terminal device needs to report the grouping information of each of the N first port groups. For example, the reference signal port or the number of reference signal ports included in each first port group.
  • the network device determines the N first port groups based on the grouping information of each of the N first port groups reported by the terminal device.
  • step 801a may be performed before step 803.
  • the network device sends first configuration information to the terminal device.
  • the first configuration information is used to configure P second port groups.
  • the terminal device receives the first configuration information from the network device.
  • the N first port groups are determined according to a preset rule and the P second port groups, where P is an integer greater than or equal to 1.
  • the preset rule includes: N first port groups correspond one to one with P second port groups, and the N first port groups are P second port groups.
  • N first port groups are P second port groups. As shown in FIG5 , the N first port groups include three first port groups. The first first port group includes reference signal port 0 and reference signal port 1, the second first port group includes reference signal port 2 and reference signal port 3, and the third first port group includes reference signal port 4 and reference signal port 5.
  • the preset rule includes: each first port group in the N first port groups corresponds to a plurality of second port groups in the P second port groups.
  • each second port group in the P second port groups constitutes the first first port group in the N first port groups.
  • the second reference signal port in each second port group in the P second port groups constitutes the second first port group of the N first port groups.
  • each second port group includes S reference signal ports, where S is an integer greater than or equal to 2.
  • the Sth reference signal port of each second port group in the P second port groups constitutes the Nth first port group.
  • the P second port groups include two second port groups, wherein the first second port group includes reference signal port 0, reference signal port 2, and reference signal port 4, and the second second port group includes reference signal port 1, reference signal port 3, and reference signal port 5.
  • the N first port groups include three first port groups, wherein the first first port group includes reference signal port 0 and reference signal port 1, the second first port group includes reference signal port 2 and reference signal port 3, and the third first port group includes reference signal port 4 and reference signal port 5.
  • the following describes a method for determining the P second port groups.
  • the first configuration information includes the number of multiple reference signal ports and the code division multiplexing type adopted by the multiple reference signal ports.
  • N first port groups are P second port groups
  • the value of P is any of the following:
  • the number of the multiple reference signal ports is 8
  • the code division multiplexing type is cdm4-TD2-FD2
  • the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2. Therefore, it can be known that P is equal to 4.
  • the number of the multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2, so each code division multiplexing group includes 4 reference signal ports. Therefore, the number of code division multiplexing groups is 2, and P is equal to 4.
  • the number of multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. It can be seen that each code division multiplexing group includes 4 reference signal ports. Therefore, the number of code division multiplexing groups is 2. And the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2. Therefore, P is equal to 4.
  • the value of P is any of the following:
  • the number of the multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. Therefore, the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2, and therefore P is equal to 2.
  • the number of multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. Therefore, the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2, and the number of code division multiplexing groups is 2. Therefore, P is equal to 2.
  • the first configuration information includes the number of multiple reference signal ports, the code division multiplexing type adopted by the multiple reference signal ports, and the fifth coefficient.
  • the network device can configure the fifth coefficient, so that the terminal device can determine the P second port groups weighted in the analog domain through the fifth coefficient.
  • N first port groups are P second port groups
  • the value of P is any of the following:
  • the number of the multiple reference signal ports is 8
  • the code division multiplexing type is cdm4-TD2-FD2
  • the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2, and the first coefficient is 2. Therefore, it can be known that P is equal to 2.
  • the number of code division multiplexing groups is equal to the ratio of the number of the multiple reference signal ports to the number of reference signal ports included in each code division multiplexing group indicated by the code division multiplexing type.
  • the number of the multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2, so each code division multiplexing group includes 4 reference signal ports. Therefore, the number of code division multiplexing groups is 2, the first coefficient is 2, and P is equal to 2.
  • the number of multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. It can be seen that each code division multiplexing group includes 4 reference signal ports. Therefore, the number of code division multiplexing groups is 2. And the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2. The first coefficient is 2, so P is equal to 2.
  • the value of P is any of the following:
  • the number of reference signal ports using time domain code division indicated by the code division multiplexing type is divided by the fifth coefficient.
  • the number of multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. Therefore, it can be seen that the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2, and the fifth coefficient is 1, so P is equal to 2.
  • the number of multiple reference signal ports is 8, and the code division multiplexing type is cdm4-TD2-FD2. Therefore, the number of reference signal ports using time domain code division indicated by the code division multiplexing type is 2, then the number of code division multiplexing groups is 2, and the fifth coefficient is 2. Therefore, P is equal to 1.
  • the network device may indirectly indicate the number of the P second port groups through configuration information of the reference signal.
  • the reference signal ports in the P second port groups are obtained by equally dividing the multiple reference signal ports according to the port numbers of the reference signal ports from small to large or from large to small based on the number of the P second port groups.
  • the P second port groups include three second port groups.
  • the multiple reference signal ports include six reference signal ports. Therefore, the first second port group includes reference signal port 0 and reference signal port 1.
  • the second second port group includes reference signal port 2 and reference signal port 3.
  • the third second port group includes reference signal port 4 and reference signal port 5.
  • the reference signal ports in the P second port groups are obtained by dividing the multiple reference signal ports according to other orders of the port numbers of the reference signal ports based on the number of the P second port groups, and this application does not make any specific limitations.
  • the first configuration information includes a sixth coefficient X.
  • the sixth coefficient is used to indicate that each of the P second port groups includes X reference signal ports, and the i-th second port group among the P second port groups includes X reference signal ports with consecutive port numbers starting from and including the X*i-th reference signal port.
  • i is an integer greater than or equal to 1 and less than or equal to P.
  • P is an integer greater than or equal to 1.
  • the sixth coefficient X indicates that, starting from the reference signal port with the smallest port number among the multiple reference signal ports, every X consecutive reference signal ports with port numbers correspond to a second port group.
  • the plurality of reference signal ports include reference signal port 0 to reference signal port 3.
  • the sixth coefficient X is equal to 4, then reference signal port 0, reference signal port 1, reference signal port 2 and reference signal port 3 constitute a first second port group.
  • Reference signal port 4, reference signal port 5, reference signal port 6 and reference signal port 7 constitute a second second port group. That is, a total of two second port groups are included.
  • the first configuration information includes a seventh coefficient Y
  • the seventh coefficient Y is used to indicate that the difference between the port numbers of any two reference signal ports with adjacent port numbers in each of the P second port groups is Y
  • the port number of the reference signal port in the i-th second port group among the P second port groups is an integer multiple of i-1
  • i is an integer greater than or equal to 1 and less than or equal to P
  • Y is an integer greater than or equal to 1.
  • the seventh coefficient Y is used to indicate that the reference signal ports, starting from the reference signal port with the smallest port number among the multiple reference signal ports, and the reference signal ports spaced apart by Y reference signal ports constitute a second port group.
  • the plurality of reference signal ports include reference signal port 0 to reference signal port 3.
  • the seventh coefficient Y is equal to 2, so it can be seen that reference signal port 0 and reference signal port 2 constitute the first second port group, reference signal port 1 and reference signal port 5 constitute the second second port group, reference signal port 2 and reference signal port 6 constitute the third second port group, and reference signal port 3 and reference signal port 7 constitute the fourth second port group.
  • the above step 803 specifically includes step 803a and step 803b.
  • the terminal device determines channel information of P second port groups according to the first configuration information and channels of multiple reference signal ports.
  • the plurality of reference signal ports include reference signal port 0 to reference signal port 7.
  • the P second port groups include four second port groups.
  • the first second port group includes reference signal port 0 and reference signal port 2.
  • the second second port group includes reference signal port 1 and reference signal port 5.
  • the third second port group includes reference signal port 2 and reference signal port 6.
  • the fourth second port group includes reference signal port 3 and reference signal port 7.
  • the plurality of reference signal ports include reference signal port 0 to reference signal port 7.
  • the P second port groups include two second port groups.
  • the port numbers of the reference signal ports in the first second port group are ⁇ 0, 2, 4, 6 ⁇ , and the port numbers of the reference signal ports in the second second port group are ⁇ 1, 3, 5, 7 ⁇ .
  • the terminal device can form the channel information of the first second port group with the channel information of reference signal port 0, the channel information of reference signal port 2, the channel information of reference signal port 4, and the information of reference signal port 6.
  • the terminal device can form the channel information of the second second port group with the channel information of reference signal port 1, the channel information of reference signal port 3, the channel information of reference signal port 5, and the information of reference signal port 7.
  • the terminal device determines channel information of the N first port groups according to a preset rule and channel information of the P second port groups.
  • the preset rule includes one-to-one correspondence between N first port groups and P second port groups, that is, N first port groups are P second port groups. Then the terminal device uses the channel information of the P second port groups as the channel information of the N first port groups.
  • the preset rule includes that each first port group in the N first port groups corresponds to multiple second port groups in the P second port groups.
  • the terminal device determines the channel information of the N first port groups according to the channel information of the P second port groups.
  • the plurality of reference signal ports include reference signal port 0 to reference signal port 7.
  • the P second port groups include two second port groups.
  • the port numbers of the reference signal ports in the first second port group are ⁇ 0, 2, 4, 6 ⁇ , and the port numbers of the reference signal ports in the second second port group are ⁇ 1, 3, 5, 7 ⁇ .
  • the terminal device may form the channel information of the first second port group with the channel information of reference signal port 0, the channel information of reference signal port 2, the channel information of reference signal port 4, and the channel information of reference signal port 6.
  • the terminal device may form the channel information of the second second port group with the channel information of reference signal port 1, the channel information of reference signal port 3, the channel information of reference signal port 5, and the channel information of reference signal port 7.
  • the N first port groups include 4 first port groups, the port numbers of the reference signal ports in the first first port group are ⁇ 0, 2 ⁇ , the port numbers of the reference signal ports in the second first port group are ⁇ 1, 5 ⁇ , the port numbers of the reference signal ports in the third first port group are ⁇ 2, 6 ⁇ , and the port numbers of the reference signal ports in the fourth first port group are ⁇ 3, 7 ⁇ . Then the terminal device can determine the channel information of the first first port group from the channel information of the first second port group, determine the channel information of the second first port group from the channel information of the second second port group, determine the channel information of the third first port group from the channel information of the first second port group, and determine the channel information of the fourth first port group from the channel information of the second second port group.
  • the first configuration information may also include the dimension of the transmitting antenna port of the network device.
  • the dimension of the transmitting antenna port is used to characterize the number of transmitting antenna ports of the network device in the horizontal direction and the number of transmitting antenna ports in the vertical direction. This facilitates the terminal device to quantize the PMI using a suitable basis and improves the accuracy of the PMI reported by the terminal device.
  • the dimension of the transmit antenna port is 2 ⁇ 4, which means that the network device has two transmit antenna ports in the horizontal direction and four transmit antenna ports in the vertical direction. It should be understood that the transmit antenna port of the network device can also be one-dimensional, that is, the number of transmit antenna ports in the horizontal direction is 1, or the number of transmit antenna ports in the vertical direction is 1.
  • step 801a may be executed first, and then steps 801 to 802; or, steps 801 to 802 may be executed first, and then step 801a; or, Step 801a, step 801 to step 802 are executed simultaneously according to the situation, and this application does not limit the specifics.
  • the above steps 802 to 803 may be replaced by: the terminal device determines N first port groups according to the multiple reference signal ports. Specifically, the terminal device divides the multiple reference signal ports into N first port groups.
  • N first port groups please refer to the relevant introduction above.
  • the terminal device determines N first port groups according to the multiple reference signal ports specifically including: the terminal device determines P second port groups according to the first configuration information; then, the terminal device determines N first port groups according to a preset rule and the P second port groups.
  • the preset rule includes a one-to-one correspondence between N first port groups and P second port groups, that is, N first port groups are P second port groups. That is, the terminal device uses the P second port groups as the N first port groups.
  • the preset rule includes that each first port group in the N first port groups corresponds to multiple second port groups in the P second port groups.
  • the terminal device determines the N first port groups according to the P second port groups.
  • the specific determination process is similar to the process of the aforementioned step 803b, and can refer to the aforementioned related introduction.
  • the terminal device determines channel state information of the N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups.
  • the N equivalent ports correspond to the N first port groups one by one.
  • the channel information of the N first port groups is determined according to the reference signal.
  • the process of determining the channel information of the N first port groups can refer to the relevant introduction of the aforementioned steps 802 to 803.
  • the first weight is W1
  • the N first port groups include two first port groups, the port number of the reference signal port of the first first port group is ⁇ 0,1 ⁇ , and the port number of the reference signal port of the second first port group is ⁇ 2,3 ⁇ .
  • the channel information of the first first port group is represented as P1
  • the channel information of the second first port group is represented as P2. Since each first port group includes two reference signal ports, it can be seen that the first weight W1 is a 2-dimensional column vector.
  • the N first equivalent ports include two equivalent ports, namely equivalent port 1 and equivalent port 2.
  • the terminal device weights the channel information of the first port group according to the first weight W1 to obtain the channel information of equivalent port 1 at the first weight W1, and weights the channel information of the second first port group by the first weight W1 to obtain the channel information of equivalent port 2 at the first weight W1.
  • P"1 W1 [W1] T * P1 Formula 1
  • P"2 W1 [W1] T * P2 Formula 2
  • P"1 W1 is the channel information of the equivalent port 1 under the first weight W1.
  • P"2 W1 is the channel information of the equivalent port 2 under the first weight W1.
  • the terminal device determines the channel state information of the equivalent port 1 at the first weight W1 according to the channel information of the equivalent port 1 at the first weight W1.
  • the terminal device determines the channel state information of the equivalent port 2 at the first weight W1 according to the channel information of the equivalent port 2 at the first weight W1.
  • the channel state information of equivalent port 1 under the first weight W1 can be equivalent to the channel state information of digital port 1 obtained by the terminal device measuring reference signal 1.
  • the channel state information of equivalent port 2 under the first weight W1 can be equivalent to the channel state information of digital port 2 obtained by the terminal device measuring reference signal 1.
  • Reference signal 1 is a reference signal sent by the network device through the beam corresponding to the first weight W1.
  • the dimension of the first weight is the same as the number of reference signal ports included in each first port group.
  • each first port group includes two reference signal ports, so the first weight can be a 2-dimensional column vector.
  • the first weight can also be a matrix, which is not specifically limited in this application.
  • step 804 a the embodiment shown in FIG. 8 further includes step 804 a , and step 804 a may be performed before step 805 .
  • the terminal device determines channel state information of the N equivalent ports at each second weight among the R second weights according to the R second weights and the channel information of the N first port groups.
  • R is an integer greater than or equal to 1.
  • one equivalent port among the N equivalent ports corresponds to one digital port, and different equivalent ports correspond to different digital ports.
  • reference signal port 0 and reference signal port 1 are weighted to obtain equivalent port 0, and the equivalent port 1 corresponds to digital port 0.
  • Reference signal port 2 and reference signal port 3 are weighted to obtain equivalent port 1, and the equivalent port 1 corresponds to digital port 1.
  • the reference signal port 4 and the reference signal port 5 are weighted to obtain an equivalent port 2, and the equivalent port 2 corresponds to the digital port 2.
  • one equivalent port among the N equivalent ports corresponds to multiple digital ports, and different equivalent ports correspond to different digital ports.
  • reference signal port 0 and reference signal port 1 are weighted to obtain equivalent port 0, and the equivalent port 1 corresponds to digital port 0 and digital port 1.
  • Reference signal port 2 and reference signal port 3 are weighted to obtain equivalent port 1, and the equivalent port 1 corresponds to digital port 2 and digital port 3.
  • Reference signal port 4 and reference signal port 5 are weighted to obtain equivalent port 2, and the equivalent port 2 corresponds to digital port 4 and digital port 5.
  • the first weight is W1
  • the R second weights include the second weight W2 and the second weight W3.
  • the N first port groups include two first port groups, the port number of the reference signal port of the first first port group is ⁇ 0,1 ⁇ , and the port number of the reference signal port of the second first port group is ⁇ 2,3 ⁇ .
  • the N first equivalent ports include two equivalent ports, namely equivalent port 1 and equivalent port 2.
  • the channel information of the first first port group is represented as P1
  • the channel information of the second first port group is represented as P2. Since each first port group includes two reference signal ports, the first weight and the R second weights are both 2-dimensional column vectors.
  • the terminal device weights the channel information of the first first port group according to the first weight W1 and the R second weights W2 to obtain the channel information of the equivalent port 1 under each weight in the first weight W1 and the R second weights W2.
  • the terminal device weights the channel information of the second first port group according to the first weight W1 and the R second weights to obtain the channel information of the equivalent port 2 under each weight of the first weight W1 and the R second weights W2.
  • [P"1 W1 P"1 W2 P"1 W3 ] [W1 W2 W2] T *P1 Formula 3
  • P"1 W1 is the channel information of equivalent port 1 under the first weight W1.
  • P"2 W1 is the channel information of equivalent port 2 under the first weight W1.
  • P"1 W2 is the channel information of equivalent port 2 under the first weight W1.
  • P"2 W2 is the channel information of equivalent port 2 under the second weight W2.
  • P"1 W3 is the channel information of equivalent port 2 under the second weight W3.
  • P"2 W3 is the channel information of equivalent port 2 under the second weight W3.
  • the terminal device determines the channel state information of the equivalent port 1 at each of the first weight W1 and the R second weights W2 according to the channel information of the equivalent port 1 at each of the first weight W1 and the R second weights W2.
  • the terminal device determines the channel state information of the equivalent port 2 at each of the first weight W1 and the R second weights W2 according to the channel information of the equivalent port 2 at each of the first weight W1 and the R second weights W2.
  • the channel state information of the equivalent port 1 under the second weight W2 can be equivalent to the channel state information of the digital port 1 obtained by the terminal device measuring the reference signal 2.
  • the channel state information of the equivalent port 2 under the second weight W2 can be equivalent to the channel state information of the digital port 2 obtained by the terminal device measuring the reference signal 2.
  • Reference signal 2 is a reference signal sent by the network device through the beam corresponding to the second weight W2.
  • the channel state information of the equivalent port 1 under the second weight W3 can be equivalent to the channel state information of the digital port 1 obtained by the terminal device measuring the reference signal 3.
  • the channel state information of the equivalent port 2 under the second weight W3 can be equivalent to the channel state information of the digital port 2 obtained by the terminal device measuring the reference signal 3.
  • Reference signal 3 is a reference signal sent by the network device through the beam corresponding to the second weight W3.
  • the terminal device obtains the channel information of the N first port groups.
  • the channel information of the N first port groups is more complete channel information.
  • the terminal device can obtain the channel state information of the beam corresponding to each weight through each weight. It is beneficial for the terminal device to quickly obtain the channel state information of each beam and feed back the corresponding channel state information to the network device. Thereby improving the efficiency of the network device in obtaining the channel state information.
  • the network device only needs to send the reference signal through the resource of the reference signal, and there is no need to configure multiple reference signal resources for channel measurement, thereby reducing resource overhead and power consumption loss caused by the network device sending the reference signal.
  • the terminal device can obtain relatively complete channel information by measuring the reference signal, without measuring multiple reference signals, thereby reducing the power consumption loss caused by the terminal device measuring the reference signal.
  • the terminal device sends first channel state information to the network device.
  • the network device receives the first channel state information from the terminal device.
  • the first channel state information includes the channel state information of the N equivalent ports under the first weight. Alternatively, the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight.
  • the channel state information of the N equivalent ports under the first weight includes a first PMI, and the first PMI is used to indicate the precoding matrix of the N equivalent ports under the first weight.
  • the first channel state information includes an index of a first basis and a first coefficient.
  • the first coefficient is determined based on the precoding matrix of the N equivalent ports under the first weight and the first basis.
  • the first basis is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis.
  • each element in the precoding matrix of the N equivalent ports under the first weight corresponds to an equivalent port and a frequency domain unit
  • the element represents the precoding weight of the equivalent port under the frequency domain unit.
  • Different elements in the precoding matrix correspond to different equivalent ports and/or different frequency domain units.
  • the first coefficient is obtained by projecting the precoding matrix of the N equivalent ports under the first weight onto the first basis.
  • W is the precoding matrix of N equivalent ports under the first weight.
  • Ws1 is the spatial basis
  • the number of columns of Ws1 is equal to the number of spatial basis vectors
  • the number of rows of Ws1 is equal to N.
  • the number of spatial basis vectors can be the number of spatial basis vectors configured by the network device for the terminal device.
  • the column vectors in Ws1 are spatial basis vectors
  • W2 is the first coefficient
  • the i-th row vector in W2 corresponds to the i-th column vector of Ws1
  • whether the elements in the i-th row vector in W2 are all 0 can be equivalent to whether the i-th column vector of Ws1 is reported.
  • W is a precoding matrix of N equivalent ports under the first weight.
  • W f1 is a frequency domain basis
  • the number of columns of W f1 is equal to the number of frequency domain basis vectors
  • the number of rows of W f1 is equal to the number of frequency domain units.
  • the number of frequency domain basis vectors may be the number of frequency domain basis vectors configured by the network device for the terminal device.
  • the column vectors in W f1 are frequency domain basis vectors.
  • the number of columns of W s1 is equal to the number of spatial domain basis vectors, and the number of rows of W s1 is equal to N.
  • the number of spatial domain basis vectors may be the number of spatial domain basis vectors configured by the network device for the terminal device.
  • the column vectors in W s1 are spatial domain basis vectors.
  • W 3 is a first coefficient, the number of rows of W 3 is equal to the number of spatial domain basis vectors, and the number of columns is equal to the number of frequency domain basis vectors.
  • the i-th row and j-th column element in W 3 represents the coefficient corresponding to the i-th spatial domain basis vector in W s1 and the j-th frequency domain basis vector in W f1 .
  • the i-th spatial domain basis vector in W s1 is the i-th column vector in W s1
  • the j-th frequency domain basis vector in W f1 is the j-th column vector in W f1 .
  • i is greater than or equal to 1 and less than or equal to the number of spatial domain basis vectors
  • j is greater than or equal to 1 and less than or equal to the number of frequency domain basis vectors.
  • W is a precoding matrix of N equivalent ports under the first weight.
  • the number of rows of W s2 is equal to N, and the number of columns of W s2 and W f2 is equal to the number of space-frequency basis vectors.
  • the number of rows of W f2 is equal to the number of frequency domain units.
  • the number of space-frequency basis vectors can be the number of space-frequency basis vectors configured by the network device for the terminal device.
  • W 4 is the second coefficient, and in particular, W 4 is a diagonal matrix, and the number of rows of W 4 and the number of columns of W 4 are both equal to the number of space-frequency basis vectors.
  • the b-th diagonal element in W 4 represents the coefficient corresponding to the b-th space-frequency basis vector, and the p-th space-frequency basis vector is determined by the b-th column vector of W s2 and the b-th column vector in W f2 .
  • b is greater than or equal to 1 and less than or equal to the number of space-frequency basis vectors.
  • the element is defaulted to 0. That is, whether the bth diagonal element in W 4 is 0 is equivalent to whether the space-frequency basis vector corresponding to the bth diagonal element in W 4 is reported.
  • the above first basis is determined according to the space-frequency basis vectors corresponding to the non-zero diagonal elements in W 4 .
  • the first channel state information includes an index of a frequency domain basis, an index of M equivalent ports out of N equivalent ports, and a second coefficient corresponding to the precoding weights of the M equivalent ports under the first weights, the second coefficient being determined based on the precoding weights of the M equivalent ports under the first weights and the frequency domain basis, where M is greater than or equal to 1 and less than N.
  • the second coefficient is obtained by projecting the precoding weights of the M equivalent ports under the first weights on the frequency domain basis.
  • Implementation method 2 is actually a special form of the example in implementation method 1.
  • Implementation method 2 is introduced below through examples such as formula 10 or formula 11.
  • W1 represents the precoding weights of the M equivalent ports under the first weight.
  • Ws3 is a unit matrix, each column vector in Ws3 corresponds to an equivalent port, and different column vectors correspond to different equivalent ports. Whether the elements of the a-th row in W5 are all 0 can be equivalent to whether the equivalent port corresponding to the i-th column vector in Ws3 is reported.
  • a is an integer greater than or equal to 1 and less than or equal to N.
  • Wf3 is a frequency domain basis
  • the column vector in Wf3 is a frequency domain basis vector.
  • the number of rows of Wf3 is equal to the number of frequency domain units
  • the number of columns of Wf3 is equal to the number of frequency domain basis vectors.
  • Whether the elements of the jth column in W 5 are all 0 is equivalent to whether the jth column vector of W f3 is reported.
  • j is greater than or equal to 1 and less than or equal to the number of frequency domain basis vectors.
  • the above frequency domain basis is composed of the frequency domain basis vectors of W f3 corresponding to the column vectors whose elements in W f3 are not all 0.
  • the terminal device can project the precoding matrix indicated by the first PMI onto the frequency domain basis 1.
  • the frequency domain basis 1 may include all frequency domain basis vectors configured by the network device for the terminal device. Then, the terminal device selects the M equivalent ports with the largest projection energy after the projection of the precoding matrix indicated by the first PMI and the X1 frequency domain basis vectors on the M equivalent ports. The terminal device reports the second coefficients of the precoding weights of the M equivalent ports selected by it, the index of the frequency domain basis 2, and the projection of the precoding weights of the M equivalent ports onto the frequency domain basis 2.
  • the frequency domain basis 2 includes the X1 frequency domain basis vectors, and the second coefficient includes amplitude and phase.
  • the terminal device reports the channel state information of the N equivalent ports under the first weight by means of port selection, that is, the terminal device selects to report the channel state information of the M equivalent ports under the first weight.
  • the first channel state information further includes at least one of the following: a first CQI and a first RI.
  • the first CQI is used to indicate the channel quality corresponding to the N equivalent ports under the first weight.
  • the first RI is used to indicate the rank of the channel corresponding to the N equivalent ports under the first weight.
  • the above example description is only used to assist understanding and does not limit the specific form of coefficient reporting or the specific calculation method of basis quantization.
  • the above example can also be equivalently written as a linear combination of the spatial domain basis, frequency domain basis or space-frequency basis corresponding to the non-zero coefficients reported by the terminal device.
  • the first channel state information is determined according to the channel state information of the N equivalent ports at the first weight and the channel state information of the N equivalent ports at each of the second weights of X second weights among the R second weights, where X is an integer greater than or equal to 1 and less than or equal to R.
  • X is a default value pre-agreed between the network device and the terminal device, or is configured by the network device for the terminal device, and this application does not limit it specifically.
  • the first channel state information includes a first PMI and X second PMIs, the first PMI being used to indicate a precoding matrix of the N equivalent ports under a first weight.
  • the channel state information of the N equivalent ports under each second weight among the R second weights includes R second PMIs, the R second PMIs correspond one-to-one to the R second weights, and one second PMI among the R second PMIs is used to indicate a precoding matrix of the N equivalent ports under a second weight corresponding to the second PMI.
  • the X second PMIs belong to the R second PMIs.
  • the terminal device may quantize the first PMI and the X second PMIs and then report them to the network device.
  • the channel state information of the N equivalent ports under the first weight includes the first PMI
  • the first PMI is used to indicate the precoding matrix of the N equivalent ports under the first weight.
  • the channel state information of the N equivalent ports at each second weight among the R second weights includes R second PMIs, the R second PMIs correspond one-to-one to the R second weights, and one second PMI among the R second PMIs is used to indicate the precoding matrix of the N equivalent ports at the second weight corresponding to the second PMI.
  • the first channel state information includes a third coefficient, X fourth coefficients, and an index of a second basis.
  • the third coefficient is determined according to the precoding matrix of the N equivalent ports under the first weight and the second basis.
  • the X fourth coefficients correspond one-to-one to the X second PMIs of the R second PMIs.
  • a fourth coefficient of the X fourth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the fourth coefficient and the second basis.
  • the second basis is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis.
  • the third coefficient is obtained by projecting the precoding matrix of the N equivalent ports under the first weight on the second basis.
  • One of the X fourth coefficients is obtained by projecting the precoding matrix indicated by the second PMI corresponding to the fourth coefficient on the second basis.
  • the terminal device uses the second basis as a shared basis, and projects the first PMI and the X second PMIs onto the second basis to obtain corresponding coefficients.
  • the terminal device can select more shared basis. Then, the terminal device projects the first PMI and the X second PMIs onto the more shared basis to obtain corresponding coefficients and reports them. This application is not limited to this.
  • the first channel state information further includes an eighth coefficient, an index of a third basis, X ninth coefficients, and indexes of basis to which the X ninth coefficients correspond respectively.
  • the eighth coefficient is determined according to the precoding matrix of the N equivalent ports under the first weight and the third basis
  • the X ninth coefficients correspond one-to-one to the X second PMIs
  • one ninth coefficient among the X ninth coefficients is determined according to the precoding matrix indicated by the second PMI corresponding to the ninth coefficient and the basis to which the ninth coefficient corresponds
  • the third basis is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis
  • the basis to which the X ninth coefficients correspond respectively is a spatial domain basis, a frequency domain basis, or a space-frequency joint basis.
  • the eighth coefficient is obtained by projecting the precoding matrix of the N equivalent ports under the first weight on the third basis.
  • a ninth coefficient among the X ninth coefficients is obtained by projecting the precoding matrix indicated by the second PMI corresponding to the ninth coefficient on the basis corresponding to the ninth coefficient.
  • the terminal device projects the precoding matrix indicated by each PMI onto a basis.
  • the terminal device can select more bases for each PMI, and project the precoding matrix indicated by the PMI onto the more bases to obtain corresponding coefficients and report them. This application is not limited to this.
  • the first channel state information also includes at least one of the following: a first CQI, a first RI, X second CQIs, or X second RIs.
  • the X second CQIs correspond one-to-one to the X second weights, and one second CQI among the X second CQIs is used to indicate the channel quality corresponding to the N equivalent ports under the second weight corresponding to the second CQI.
  • the X second RIs correspond one-to-one to the X second weights, and one second RI among the X second RIs is used to indicate the rank of the channel corresponding to the N equivalent ports under the second weight corresponding to the second RI.
  • step 801b to introduce implementation mode 1.
  • the embodiment shown in FIG8 further includes step 801b.
  • Step 801b may be performed before step 804.
  • the network device sends second configuration information to the terminal device.
  • the second configuration information is used to configure the first weight.
  • the terminal device receives the second configuration information from the network device.
  • the network device may configure the first weight for the terminal device.
  • the second configuration information is also used to configure the R second weights.
  • step 801b may be executed first, and then steps 801a to 803; or, steps 801a to 803 may be executed first, and then step 801b; or, step 801b and steps 801a to 803 may be executed simultaneously according to the circumstances, and the present application does not make any specific limitation.
  • step 801a and step 801b may be the same configuration information or two different configuration information, which is not specifically limited in this application.
  • the first weight is determined by the terminal device.
  • the first weight is a first codebook selected by the terminal device from the codebook set.
  • the codebook set is configured by the network device for the terminal device, or is specified by the communication protocol, which is not specifically limited in this application.
  • the above-mentioned R second weights may also be R codebooks selected by the terminal device from the codebook set.
  • the codebook in the codebook set may be a DFT matrix.
  • the codebooks in the codebook set may feed back the phase difference between the transmitting port in the horizontal direction and the transmitting port in the vertical direction according to a certain quantization accuracy.
  • the network device configures the following parameters for the terminal device: N 1 , N 2 , O 1 , O 2 .
  • N 1 represents the dimension of the transmitting antenna port in the horizontal direction
  • N 2 represents the dimension of the transmitting antenna port in the vertical direction.
  • O 1 represents the oversampling coefficient corresponding to the dimension of the transmitting antenna port in the horizontal direction
  • O 2 represents the oversampling coefficient corresponding to the dimension of the transmitting antenna port in the vertical direction.
  • N 1 represents the dimension of the transmitting antenna port in the vertical direction
  • N 2 represents the dimension of the transmitting antenna port in the horizontal direction.
  • O 1 represents the oversampling coefficient corresponding to the dimension of the transmitting antenna port in the vertical direction
  • O 2 represents the oversampling coefficient corresponding to the dimension of the transmitting antenna port in the horizontal direction.
  • N1 and N2 are determined by the implementation of the network device and are not specifically limited in this application.
  • the first codebook fed back by the terminal device may be in the form of v q,p , which is specifically expressed as:
  • the values of q and p are determined by the terminal device. For example, the terminal device may determine the optimal (q, p) and then feedback the optimal (q, p). It should be noted that the terminal device needs to feedback p only when the value of N 2 is greater than 1.
  • the terminal device uses the same codebook in different polarization directions. For different polarization directions, it may not be explicitly reflected in the communication protocol.
  • the first part of the reference port corresponds to the first polarization direction
  • the second part of the reference signal port corresponds to the second polarization direction.
  • the first part of the reference signal port is the first half of the reference signal ports with smaller port numbers among the multiple reference signal ports.
  • the second part of the reference signal ports is the second half of the reference signal ports with larger port numbers among the multiple reference signal ports.
  • Each of the multiple first port groups consisting of the first part of the reference signal ports and the second part of the reference signal ports is weighted using the first codebook.
  • step 805 a the embodiment shown in FIG. 8 further includes step 805 a , and step 805 a may be performed after step 804 .
  • the terminal device sends indication information to the network device.
  • the indication information is used to indicate the first codebook; or the indication information is used to indicate the beam pointing corresponding to the first weight value, and the beam pointing corresponding to the first weight value is used by the network device to determine the first codebook.
  • the network device receives the indication information from the terminal device.
  • the network device configures the following antenna array arrangement for the terminal device: antenna spacing between transmitting antenna ports in the horizontal direction (for example, 0.5 wavelength), antenna spacing between transmitting antenna ports in the vertical direction, and dimension of the transmitting antenna ports. Then, the terminal device can report the beam pointing corresponding to the first weight under the antenna array arrangement.
  • the terminal device may also quantize and report in other forms, which is not limited in this application.
  • the terminal device may quantize and report the modulus and/or phase of the elements in the first codebook. This application does not limit this.
  • Step 805 can be executed first, and then step 805a; or, step 805a can be executed first, and then step 805; or, step 805 and step 805a can be executed simultaneously depending on the situation, and this application does not make any specific limitations.
  • the terminal device determines the channel information of the multiple reference signal ports through the reference signal.
  • the channel information of the multiple reference signal ports is more complete channel information.
  • the terminal device can determine the channel information of the N first port groups based on the channel information of the multiple reference signal ports, and then determine the channel state information of the N equivalent ports under the first weight in combination with the first weight and the channel information of the N first port groups. Thereby, the terminal device obtains the channel state information of the beam corresponding to the first weight.
  • the terminal device can obtain more complete channel information based on the reference signal. It is beneficial for the terminal device to quickly obtain the channel state information of the beam corresponding to each weight, and feed back the corresponding channel state information to the network device. Improve the efficiency of the network device in obtaining channel state information.
  • the communication device provided in the embodiment of the present application is described below.
  • Fig. 12 is a schematic diagram of the first structure of the communication device of the embodiment of the present application.
  • the communication device can be used to execute the process executed by the terminal device in the embodiment shown in Fig. 8, and for details, please refer to the relevant introduction in the above method embodiment.
  • the communication device 1200 includes a processing module 1201 and a transceiver module 1202.
  • the transceiver module 1202 can implement corresponding communication functions, and the processing module 1201 is used for data processing.
  • the transceiver module 1202 can also be called a communication interface or a communication module.
  • the communication device 1200 may further include a storage module, which may be used to store instructions and/or data, and the processing module 1201 may read the instructions and/or data in the storage module so that the communication device implements the aforementioned method embodiment.
  • a storage module which may be used to store instructions and/or data
  • the processing module 1201 may read the instructions and/or data in the storage module so that the communication device implements the aforementioned method embodiment.
  • the communication device module 1200 can be used to perform the actions performed by the terminal device in the embodiment shown in FIG. 8 above.
  • the communication device 1200 can be a terminal device or a component that can be configured in a terminal device.
  • the processing module 1201 is used to perform processing-related operations on the terminal device side in the embodiment shown in FIG. 8 above.
  • the transceiver module 1202 is used to perform reception-related operations on the terminal device side in the embodiment shown in FIG. 8 above.
  • the transceiver module 1202 may include a sending module and a receiving module.
  • the sending module is used to perform the sending operation in the embodiment shown in FIG8 .
  • the receiving module is used to perform the receiving operation in the embodiment shown in FIG8 .
  • the communication device 1200 may include a sending module but not a receiving module.
  • the communication device 1200 may include a receiving module but not a sending module. Specifically, it may depend on whether the above scheme executed by the communication device 1200 includes a sending action and a receiving action.
  • the communication device 1200 is used to execute the actions executed by the terminal device in the embodiment shown in FIG. 8 above.
  • the communication device 1200 is used to execute the following solution:
  • the transceiver module 1202 is used to receive a reference signal from a network device, where the reference signal corresponds to a plurality of reference signal ports;
  • the processing module 1201 is configured to determine channel information of multiple reference signal ports according to a reference signal; determine channel information of N first port groups according to the channel information of the multiple reference signal ports, wherein the multiple reference signal ports include all reference signal ports of the N first port groups, and different first port groups in the N first port groups include different reference signal ports, where N is an integer greater than or equal to 1; determine channel state information of N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups, wherein the N first port groups correspond one to one to the N equivalent ports;
  • the transceiver module 1202 is also used to send first channel state information to the network device, where the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • the communication device 1200 is used to execute the following solution:
  • the transceiver module 1202 is used to receive a reference signal from a network device, where the reference signal corresponds to a plurality of reference signal ports;
  • the processing module 1201 is used to determine N first port groups according to a plurality of reference signal ports, where the plurality of reference signal ports include all reference signal ports of the N first port groups, and different first port groups in the N first port groups include different reference signal ports, where N is an integer greater than or equal to 1; determine channel state information of N equivalent ports under the first weight according to the first weight and the channel information of the N first port groups, where the N first port groups correspond one to one to the N equivalent ports;
  • the transceiver module 1202 is also used to send first channel state information to the network device, where the first channel state information is determined based on the channel state information of the N equivalent ports under the first weight, or the first channel state information includes the channel state information of the N equivalent ports under the first weight.
  • the processing module 1201 in the above embodiment can be implemented by at least one processor or processor-related circuit.
  • the transceiver module 1202 can be implemented by a transceiver or a transceiver-related circuit.
  • the transceiver module 1202 can also be called a communication module or a communication interface.
  • the storage module can be implemented by at least one memory.
  • Fig. 13 is a second structural diagram of the communication device of the embodiment of the present application.
  • the communication device can be used to execute the process executed by the network device in the embodiment shown in Fig. 8, and for details, please refer to the relevant introduction in the above method embodiment.
  • the communication device 1300 includes a transceiver module 1301.
  • the communication device 1300 also includes a processing module 1302.
  • the transceiver module 1301 can implement corresponding communication functions, and the processing module 1302 is used for data processing.
  • the transceiver module 1301 can also be called a communication interface or a communication module.
  • the communication device 1300 may further include a storage module, which may be used to store instructions and/or data, and the processing module 1302 may read the instructions and/or data in the storage module so that the communication device implements the aforementioned method embodiment.
  • a storage module which may be used to store instructions and/or data
  • the processing module 1302 may read the instructions and/or data in the storage module so that the communication device implements the aforementioned method embodiment.
  • the communication device 1300 can be used to perform the actions performed by the network device in the embodiment shown in FIG. 8 above.
  • the communication device 1300 can be a network device or a component that can be configured in a network device.
  • the processing module 1302 is used to perform the processing-related operations on the network device side in the embodiment shown in FIG. 8 above.
  • the transceiver module 1301 is used to perform the reception-related operations on the network device side in the embodiment shown in FIG. 8 above.
  • the transceiver module 1301 may include a sending module and a receiving module.
  • the sending module is used to perform the sending operation in the embodiment shown in FIG8 .
  • the receiving module is used to perform the receiving operation in the embodiment shown in FIG8 .
  • the communication device 1300 may include a sending module but not a receiving module.
  • the communication device 1300 may include a receiving module but not a sending module. Specifically, it may depend on whether the above scheme executed by the communication device 1300 includes a sending action and a receiving action.
  • the communication device 1300 is used to execute the actions executed by the network device in the embodiment shown in FIG. 8 above.
  • the communication device 1300 is used to execute the following solution:
  • the transceiver module 1301 is used to send a reference signal to a terminal device, where the reference signal corresponds to multiple reference signal ports; receive first channel state information from the terminal device; wherein the first channel state information is determined based on the channel state information of N equivalent ports under a first weight, or the first channel state information includes the channel state information of N equivalent ports under the first weight, the channel state information of the N equivalent ports under the first weight is determined based on the first weight and the channel information of N first port groups, the N equivalent ports correspond one-to-one to the N equivalent ports, the channel information of the N first port groups is determined based on the channel information of multiple reference signal ports, the channel information of multiple reference signal ports is determined based on the reference signal, and N is an integer greater than or equal to 1.
  • the communication device 1300 is used to execute the following solution:
  • the transceiver module 1301 is used to send a reference signal to a terminal device, where the reference signal corresponds to multiple reference signal ports; and receive first channel state information from the terminal device; wherein the first channel state information is determined based on the channel state information of N equivalent ports under a first weight, or the first channel state information includes the channel state information of N equivalent ports under a first weight, and the channel state information of N equivalent ports under the first weight is determined based on the first weight and the channel information of N first port groups, the N first port groups correspond one-to-one to the N equivalent ports, the multiple reference signal ports include all reference signal ports of the N first port groups, different first port groups in the N first port groups include different reference signal ports, and N is an integer greater than or equal to 1.
  • the processing module 1302 in the above embodiment can be implemented by at least one processor or processor-related circuit.
  • the transceiver module 1301 can be implemented by a transceiver or a transceiver-related circuit.
  • the transceiver module 1301 can also be called a communication module or a communication interface.
  • the storage module can be implemented by at least one memory.
  • FIG14 is a third structural diagram of a communication device according to an embodiment of the present application.
  • the communication device 1400 includes a processor 1410, the processor 1410 is coupled to a memory 1420, the memory 1420 is used to store computer programs or instructions and/or data, and the processor 1410 is used to execute the computer programs or instructions and/or data stored in the memory 1420, so that the method in the above method embodiment is executed.
  • the communication device 1400 includes one or more processors 1410.
  • the communication device 1400 may further include a memory 1420 .
  • the communication device 1400 may include one or more memories 1420 .
  • the memory 1420 may be integrated with the processor 1410 or provided separately.
  • the communication device 1400 may further include a transceiver 1430, and the transceiver 1430 is used for receiving and/or sending signals.
  • the processor 1410 is used to control the transceiver 1430 to receive and/or send signals.
  • the communication device 1400 is used to implement the operations performed by the terminal device in the above method embodiment.
  • the processor 1410 is used to implement the processing-related operations performed by the terminal device in the above method embodiment
  • the transceiver 1430 is used to implement the sending and receiving-related operations performed by the terminal device in the above method embodiment.
  • the communication device 1400 is used to implement the operations performed by the network device in the above embodiments.
  • the processor 1410 is used to implement the processing-related operations performed by the network device in the above method embodiment
  • the transceiver 1430 is used to implement the sending and receiving-related operations performed by the network device in the above method embodiment.
  • Fig. 15 is a fourth structural diagram of a communication device according to an embodiment of the present application.
  • the communication device 1500 may be a terminal device, a processor of a terminal device, or a chip.
  • the communication device 1500 may be used to perform the operations performed by the terminal device in the above method embodiment.
  • FIG15 shows a simplified schematic diagram of the structure of the terminal device.
  • the terminal device includes a processor, a memory, and a transceiver.
  • the memory can store computer program codes
  • the transceiver includes a transmitter 1531, a receiver 1532, a radio frequency circuit (not shown in the figure), an antenna 1533, and an input and output device (not shown in the figure).
  • the processor is mainly used to process communication protocols and communication data, as well as to control terminal devices, execute software programs, process software program data, etc.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices For example, touch screens, display screens, keyboards, etc. are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the RF circuit.
  • the RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG15 only one memory, processor, and transceiver are shown in FIG15. In an actual terminal device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device, etc.
  • the memory may be set independently of the processor or integrated with the processor, and the embodiments of the present application do not limit this.
  • the antenna and the radio frequency circuit with transceiver functions can be regarded as the transceiver module of the terminal device, and the processor with processing function can be regarded as the processing module of the terminal device.
  • the terminal device includes a processor 1510, a memory 1520 and a transceiver 1530.
  • the processor 1510 may also be referred to as a processing unit, a processing board, a processing module, a processing device, etc.
  • the transceiver 1530 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc.
  • the device for implementing the receiving function in the transceiver 1530 may be regarded as a receiving module, and the device for implementing the transmitting function in the transceiver 1530 may be regarded as a transmitting module, that is, the transceiver 1530 includes a receiver and a transmitter.
  • a transceiver may sometimes be referred to as a transceiver, a transceiver module, or a transceiver circuit, etc.
  • a receiver may sometimes be referred to as a receiver, a receiving module, or a receiving circuit, etc.
  • a transmitter may sometimes be referred to as a transmitter, a transmitting module, or a transmitting circuit, etc.
  • the processor 1510 is used to execute the processing actions on the terminal device side in the embodiment shown in FIG. 8
  • the transceiver 1530 is used to execute the transceiver actions on the terminal device side in FIG. 8 .
  • FIG15 is merely an example and not a limitation, and the terminal device including the transceiver module and the processing module may not rely on the structure shown in FIG12 .
  • the chip When the communication device 1500 is a chip, the chip includes a processor and a transceiver.
  • the transceiver may be an input/output circuit or a communication interface;
  • the processor may be a processing module or a microprocessor or an integrated circuit integrated on the chip.
  • the sending operation of the terminal device in the above method embodiment may be understood as the output of the chip, and the receiving operation of the terminal device in the above method embodiment may be understood as the input of the chip.
  • Fig. 16 is a fifth structural diagram of a communication device according to an embodiment of the present application.
  • the communication device 1600 can be a network device or a chip.
  • the communication device 1600 can be used to perform the operations performed by the network device in the above method embodiment.
  • FIG. 16 shows a simplified schematic diagram of the base station structure.
  • the base station includes parts 1610, 1620 and 1630.
  • Part 1610 is mainly used for baseband processing, controlling the base station, etc.;
  • Part 1610 is usually the control center of the base station, which can be usually called a processor, and is used to control the base station to perform the processing operations on the network device side in the above method embodiment.
  • Part 1620 is mainly used to store computer program code and data.
  • Part 1630 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; Part 1630 can usually be called a transceiver module, a transceiver, a transceiver circuit, or a transceiver, etc.
  • the transceiver module of part 1630 which can also be called a transceiver or a transceiver, etc., includes an antenna 1633 and a radio frequency circuit (not shown in the figure), wherein the radio frequency circuit is mainly used for radio frequency processing.
  • the device for implementing the receiving function in part 1630 may be regarded as a receiver, and the device for implementing the transmitting function may be regarded as a transmitter, that is, part 1630 includes a receiver 1632 and a transmitter 1631.
  • the receiver may also be referred to as a receiving module, a receiver, or a receiving circuit, etc.
  • the transmitter may be referred to as a transmitting module, a transmitter, or a transmitting circuit, etc.
  • Part 1610 and part 1620 may include one or more single boards, each of which may include one or more processors and one or more memories.
  • the processor is used to read and execute the program in the memory to realize the baseband processing function and the control of the base station. If there are multiple single boards, each single board can be interconnected to enhance the processing capability. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processors at the same time.
  • the transceiver module of part 1630 is used to execute the transceiver executed by the network device in the embodiment shown in FIG. 8 above.
  • the processor in part 1610 is used to execute the process related to the process executed by the network device in the embodiment shown in FIG. 8 .
  • FIG. 16 is merely an example and not a limitation, and the network device including the processor, memory, and transceiver may not rely on the structure shown in FIG. 13 .
  • the chip When the communication device 1600 is a chip, the chip includes a transceiver and a processor.
  • the transceiver may be an input/output circuit or a communication interface;
  • the processor may be a processor, a microprocessor, or an integrated circuit integrated on the chip.
  • the sending operation of the network device in the above method embodiment may be understood as the output of the chip, and the receiving operation of the network device in the above method embodiment may be understood as the input of the chip.
  • An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by a terminal device or a network device in the above method embodiment are stored.
  • the computer when the computer program is executed by a computer, the computer can implement the method performed by the terminal device or the network device in the above method embodiment.
  • An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method executed by a terminal device or a network device in the above method embodiment.
  • the embodiment of the present application also provides a communication system, which includes the terminal device and the network device in the above embodiment.
  • the terminal device is used to execute all or part of the steps in the embodiment shown in Figure 8.
  • the network device is used to execute all or part of the steps in the embodiment shown in Figure 8.
  • An embodiment of the present application also provides a chip device, including a processor, for calling a computer program or computer instruction stored in the memory so that the processor executes the method of the embodiment shown in FIG. 8 above.
  • the input of the chip device corresponds to the receiving operation in the embodiment shown in FIG. 8
  • the output of the chip device corresponds to the sending operation in the embodiment shown in FIG. 8 .
  • the processor is coupled to the memory via an interface.
  • the chip device further comprises a memory, in which computer programs or computer instructions are stored.
  • the processor mentioned in any of the above may be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the method of the embodiment shown in FIG8.
  • the memory mentioned in any of the above may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of 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 separately, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the part that essentially contributes to the technical solution of the present application or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

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Abstract

本申请公开了一种信道状态信息发送方法、信道状态信息接收方法和装置。方法包括：终端设备接收来自网络设备的参考信号，参考信号对应多个参考信号端口；终端设备根据该多个参考信号端口确定N个第一端口组；该多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；终端设备向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的。

Description

信道状态信息发送方法、信道状态信息接收方法和装置
本申请要求于2022年11月25日提交国家知识产权局、申请号为202211493654.3、发明名称为“信道状态信息发送方法、信道状态信息接收方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种信道状态信息发送方法、信道状态信息接收方法和装置。
背景技术
在高频通信系统中，网络设备通常都会使用大规模阵列天线发射信号。实现网络设备通过较高的阵列增益对抗频段升高带来的路径损耗，提升覆盖能力。从网络设备的实现方式来看，按照波束成形的实现方案大致可以分为三种阵列加权方式，分别为数字波束成形(digital beamforming,DBF)、模拟波束成形(analog beamforming,ABF)以及混合波束成形(hybrid beamforming,HBF)。
对于ABF和HBF来说，只有当波束对准了通信目标时，设备之间进行通信的信号质量才更好。对于某个终端设备来说，网络设备为该终端设备选择波束的过程可以称为波束扫描或波束训练。波束扫描是网络设备使用不同波束分别发送参考信号，终端设备分别对参考信号进行测量并反馈测量结果。从而协助网络设备确定哪个波束的信号质量最好，并选择该信号质量最好的波束用于该终端设备的通信传输。
上述技术方案中，针对每个波束，网络设备都需要单独发送相应的参考信号。终端设备对每个波束上的参考信号进行测量并反馈相应的信道状态信息。也就是网络设备在同一时刻只能选择一个波束并发送相应的参考信号。不同波束的参考信号只能采用时分的发送方式发送。导致网络设备获取信道状态信息的效率较低。
发明内容
本申请提供了一种信道状态信息发送方法、信道状态信息接收方法和装置，用于提升网络设备获取信道状态信息的效率。
本申请第一方面提供一种信道状态信息发送方法，包括：
终端设备接收来自网络设备的参考信号，参考信号对应多个参考信号端口；终端设备根据多个参考信号端口确定N个第一端口组，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应，终端设备向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，该第一信道状态信息包括N个等效端口在第一权值下的信道状态信息。
上述技术方案中，终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息。进一步的，该N个第一端口组的信道信息是根据参考信号确定的。该N个第一端口组的信道信息是更为完整的信道信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。进一步的，终端设备通过测量该参考信号即可获得较为完整的信道信息，无需测量多个参考信号，从而降低了终端设备测量参考信号所带来的功耗损失。
本申请第二方面提供一种信道状态发送方法，包括：
终端设备接收来自网络设备的参考信号，参考信号对应多个参考信号端口；终端设备根据参考信号确定多个参考信号端口的信道信息；终端设备根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；终端设备根据第一权值和N个第一端口组的 信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；终端设备向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，该第一信道状态信息包括N个等效端口在第一权值下的信道状态信息。
上述技术方案中，终端设备通过该参考信号确定该多个参考信号端口的信道信息。该多个参考信号端口的信道信息是更为完整的信道信息。终端设备可以根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，再结合第一权值和N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。进一步的，终端设备通过测量该参考信号即可获得较为完整的信道信息，无需测量多个参考信号，从而降低了终端设备测量参考信号所带来的功耗损失。
本申请第三方面提供一种信道状态信息接收方法，包括：
网络设备向终端设备发送参考信号，参考信号对应多个参考信号端口；网络设备接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息；N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个第一端口组与N个等效端口一一对应，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数。
上述技术方案中，网络设备向终端设备发送参考信号。从而便于终端设备获取N个第一端口组的信道信息。N个第一端口组的信道信息是根据参考信号确定的。网络设备接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的。N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的。该N个第一端口组的信道信息是更为完整的信道信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。进一步的，终端设备通过测量该参考信号即可获得较为完整的信道信息，无需测量多个参考信号，从而降低了终端设备测量参考信号所带来的功耗损失。
本申请第四方面提供一种信道状态信息接收方法，包括：
网络设备向终端设备发送参考信号，参考信号对应多个参考信号端口；网络设备接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息；N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个等效端口与所述N个等效端口一一对应，N个第一端口组的信道信息是根据多个参考信号端口的信道信息确定的，多个参考信号端口的信道信息是根据参考信号确定的，N为大于或等于1的整数。
上述技术方案中，网络设备向终端设备发送参考信号。从而实现终端设备通过该参考信号确定该多个参考信号端口的信道信息。该多个参考信号端口的信道信息是更为完整的信道信息。终端设备可以根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，再结合第一权值和N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。进一步的，网络设备只需要通过该参考信号的资源发送参考信号，无需为了信道测量配置多个参考信号的资源，从而降低资源的开销以及网络设备发送参考信号带来的功耗损失。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，N个等效端口在第一权值下的信道状态信息包括第一预编码矩阵指示(precoding matrix indicator，PMI)，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；第一信道状态信息包括第一基底的索引和第一系数，第一系数是根 据N个等效端口在第一权值下的预编码矩阵和第一基底确定的，第一基底为空域基底、频域基底、或者空频联合基底。在该实现方式中，第一信道状态信息包括第一基底的索引和第一系数。也就是终端设备通过第一基底对第一PMI进行量化压缩，从而降低终端设备上报第一PMI所带来的开销。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一信道状态信息包括频域基底的索引和N个等效端口中的M个等效端口在第一权值下的预编码权值对应的第二系数，第二系数是根据M个等效端口在第一权值下的预编码权值和频域基底确定的，M大于或等于1且小于N。在该实现方式中，终端设备可以选择上报部分等效端口在第一权值下的信道状态信息，从而降低上报开销。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一信道状态信息还包括以下至少一项：第一信道质量指示(channel quality indicator，CQI)、第一秩指示(rank indicator，RI)；其中，第一CQI用于指示N个等效端口在第一权值下对应的信道质量，第一RI用于指示N个等效端口在第一权值下对应的信道的秩。在该实现方式中，第一信息状态信息还可以包括该N个等效端口在第一权值下的更多信道状态信息，从而便于网络设备确定该第一权值对应的波束的信号质量。
基于第一方面或第二方面，一种可能的实现方式中，方法还包括：
终端设备根据R个第二权值和N个第一端口组的信道信息确定N个等效端口在R个第二权值中各个第二权值下的信道状态信息，R为大于或等于1的整数；第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息和N个等效端口在R个第二权值中的X个第二权值中各个第二权值下的信道状态信息确定的，X为大于或等于1且小于或等于R的整数。
在该实现方式中，终端设备还可以根据R个第二权值和N个第一端口组的信道信息确定N个等效端口在R个第二权值中各个第二权值下的信道状态信息。从而实现终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。无需终端设备测量多个参考信号，从而降低终端设备的功耗损失。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一信道状态信息包括第一PMI和X个第二PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；N个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵；该X个第二PMI属于该R个第二PMI。在该实现方式中，终端设备可以上报第一PMI和X个第二PMI，从而便于网络设备确定N个等效端口在对应的权值下的预编码矩阵。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，N个等效端口在第一权值下的信道状态信息包括第一PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；
N个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与所述R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵；第一信道状态信息包括第三系数、X个第四系数以及第二基底的索引；其中，第三系数是根据N个等效端口在所述第一权值下的预编码矩阵和第二基底确定的，X个第四系数与R个第二PMI中的X个第二PMI一一对应，X个第四系数中的一个第四系数是根据第四系数对应的第二PMI所指示的预编码矩阵和第二基底投影确定的，第二基底为空域基底、频域基底或空频联合基底。
在该实现方式中，第三系统是N个等效端口在所述第一权值下的预编码矩阵投影到第二基底得到的。X个第四系数中的一个第四系数是第四系数对应的第二PMI所指示的预编码矩阵投影到第二基底得到的。由此可知，第二基底是共享基底，从而实现降低终端设备上报的开销。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一信道状态信息还包括第八系数、第三基底的索引、X个第九系数和X个第九系数分别对应的基底的索引；
其中，第八系数是根据N个等效端口在第一权值下的预编码矩阵和第三基底确定的，X个第九系数与该X个第二PMI一一对应，X个第九系数中的一个第九系数是根据该第九系数对应的第二PMI所指示的预编码矩阵和该第九系数对应的基底确定的；该第三基底为空域基底、频域基底或空频联合基底，该X个第九系数分别对应的基底为空域基底、频域基底或空频联合基底。
在该实现方式中，第一信道状态信息还包括第八系数、第三基底的索引、X个第九系数，X个第九系数分别对应的基底的索引。从而实现网络设备对N个等效端口在各个权值下的信道状态信息的获取。
基于第二方面，一种可能的实现方式中，在终端设备根据多个参考信号端口的信道信息确定N个第一端口组的信道信息之前，方法还包括：终端设备接收来自网络设备的第一配置信息；第一配置信息用于指示P个第二端口组，N个第一端口组是根据预设规则和P个第二端口组确定的。在该实现方式中，终端设备还可以配置该P个第二端口组。从而便于终端设备基于该P个第二端口组确定该N个第一端口组。
基于第二方面，一种可能的实现方式中，终端设备根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，包括：终端设备根据第一配置信息和多个参考信号端口的信道信息确定P个第二端口组的信道信息；终端设备根据预设规则和P个第二端口组的信道信息确定N个第一端口组的信道信息。在该实现方式中，终端设备可以结合第一配置信息首先确定该P个第二端口组的信道信息，再确定N个第一端口组的信道信息。从而便于方案的实施。
基于第一方面，一种可能的实现方式中，在终端设备确定N个第一端口组之前，方法还包括：终端设备接收来自网络设备的第一配置信息，第一配置信息用于指示P个第二端口组，N个第一端口组是根据P个第二端口组确定的。在该实现方式中，终端设备还可以配置该P个第二端口组。从而便于终端设备基于该P个第二端口组确定该N个第一端口组。
基于第一方面，一种可能的实现方式中，终端设备确定N个第一端口组，包括：终端设备根据第一配置信息确定P个第二端口组；终端设备根据所述预设规则和P个第二端口组确定N个第一端口组。在该实现方式中，终端设备可以结合第一配置信息首先确定该P个第二端口组，再确定N个第一端口组。从而便于方案的实施。
基于第三方面或第四方面，一种可能的实现方式中，方法还包括：网络设备向终端设备发送第一配置信息；第一配置信息用于指示P个第二端口组，N个第一端口组是根据P个第二端口组确定的。从而便于终端设备基于该P个第二端口组确定该N个第一端口组。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一配置信息包括多个参考信号端口的数量和多个参考信号端口采用的码分复用类型；P的取值为以下任一项：
多个参考信号端口的数量与码分复用类型所指示的采用时域码分的参考信号端口的数量的比值；或者，码分复用类型所指示的采用时域码分的参考信号端口的数量；或者，多个参考信号端口的数量与码分复用组的数量的比值，码分复用组的数量等于多个参考信号端口的数量与码分复用类型所指示的每个码分复用组包括的参考信号端口数的比值；或者，码分复用组数量与所述码分复用类型所指示的采用时域码分的参考信号端口的数量的积；或者，码分复用组数量。在该实现方式中，示出第一配置信息包括的参考信号的相关配置，并通过参考信号的配置间接指示P的取值。从而在网络设备下发参考信号的配置的过程中，实现对P的取值的指示，有利于降低网络设备的配置开销。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，P个第二端口组中的参考信号端口是基于P个第二端口组的数量按照参考信号端口的端口号从小到大将多个参考信号端口均分得到的。
基于第一方面或第二方面，一种可能的实现方式中，方法还包括：终端设备接收来自网络设备的第二配置信息，第二配置信息用于配置第一权值。在该实现方式中，该终端设备可以接收来自网络设备配置的第一权值，从而便于终端设备确定N个等效端口在第一权值下的信道状态信息。
基于第三方面或第四方面，一种可能的实现方式中，方法还包括：网络设备向终端设备发送第二配置信息，第二配置信息用于配置第一权值。从而便于终端设备确定N个等效端口在第一权值下的信道状态信息。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一权值为终端设备确定的。在该实现方式中，终端设备可以自行确定第一权值，从而降低网络设备的指示开销。
基于第一方面或第二方面，一种可能的实现方式中，第一权值是终端设备从码本集合中选择的第一码本；方法还包括：
终端设备向网络设备发送指示信息，指示信息用于指示第一码本；或者，指示信息用于指示第一权值对应的波束指向，第一权值对应的波束指向用于网络设备确定第一码本。
在该实现方式中，如果终端设备自行确定第一权值，则终端设备还应当向网络设备指示该第一权值。从而便于网络设备确定终端设备上报的信道状态信息是哪个权值对应的波束的信道状态信息。
基于第三方面或第四方面，一种可能的实现方式中，第一权值是终端设备从码本集合中选择的第一码本；方法还包括：网络设备接收来自终端设备的指示信息，指示信息用于指示第一码本；或者，指示信息用于指示第一权值对应的波束指向，第一权值对应的波束指向用于网络设备确定所第一码本。在该实现方式中，如果终端设备自行确定第一权值，则终端设备还应当向网络设备指示该第一权值。从而便于网络设备确定终端设备上报的信道状态信息是哪个权值对应的波束的信道状态信息。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，多个参考信号端口中，第一部分参考端口对应第一极化方向，第二部分参考信号端口对应第二极化方向；其中，第一部分参考信号端口为多个参考信号端口中参考信号端口的端口号较小的前一半参考信号端口，第二部分参考信号端口为所述多个参考信号端口中参考信号端口的端口号较大的后一半参考信号端口。在该实现方式中，网络设备可以在不同参考信号端口上加载相应的极化方向，从而实现对不同极化方向的信道的测量。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，一个等效端口对应一个数字端口，不同等效端口对应不同的数字端口。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，多个参考信号端口中每个参考信号端口对应一个模拟端口，不同参考信号端口对应不同模拟端口。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一配置信息包括多个参考信号端口的数量、多个参考信号端口采用的码分复用类型以及第五系数；P的取值为以下任一项：多个参考信号端口的数量除以码分复用类型所指示的采用时域码分的参考信号端口的数量与第五系数之和；或者，码分复用类型所指示的采用时域码分的参考信号端口的数量除以第五系数；或者，多个参考信号端口的数量除以码分复用组数量，码分复用组数量等于多个参考信号端口的数量除以码分复用类型所指示的每个码分复用组包括的参考信号端口数与第五系数之和；或者，码分复用组数量乘以码分复用类型所指示的采用时域码分的参考信号端口的数量再除以第五系数；或者，码分复用组数量除以第五系数。在该实现方式中，示出第一配置信息包括的参考信号的相关配置，并通过参考信号的配置间接指示P的取值。从而在网络设备下发参考信号的配置的过程中，实现对P的取值的指示，有利于降低网络设备的配置开销。进一步的，网络设备可以并没有对全部的参考信号端口组构成的端口组在模拟域进行加权。因此第一配置信息可以包括第五系数，用于确定第二端口组的数量。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一配置信息包括第六系数X，第六系数用于指示P个第二端口组中每个第二端口组包括X个参考信号端口，且P个第二端口组中第i个第二端口组包括所述多个参考信号端口中从第X*i个参考信号端口开始的且包括第X*i个参考信号端口的端口号连续的X个参考信号端口，i为大于或等于1且小于或等于P的整数，P为大于或等于1的整数。在该实现方式中，第一配置信息包括第六系数，通过第六系数直接指示P个第二端口组中每个第二端口组包括的参考信号端口。
基于第一方面至第四方面中任一方面，一种可能的实现方式中，第一配置信息包括第七系数R，第七系数R用于指示P个第二端口组中每个第二端口组中包括任意两个端口号相邻的参考信号端口的端口号的差值为R，且P个第二端口组中第i个第二端口组中的参考信号端口的端口号为i-1的整数倍，i为大于或等于1的整数且小于或等于所述P，R为大于或等于1的整数。在该实现方式中，第一配置信息包括第七系数，通过第七系数直接指示P个第二端口组中每个第二端口组包括的参考信号端口。
本申请第五方面提供一种第一通信装置，包括：
收发模块，用于接收来自网络设备的参考信号，参考信号对应多个参考信号端口；
处理模块，用于根据多个参考信号端口确定N个第一端口组，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应。
收发模块，还用于向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括该N个等效端口在第一权值下的信道状态信息。
基于第五方面，一种可能的实现方式中，该N个第一端口组的信道信息是根据参考信号确定的。
本申请第六方面提供一种第一通信装置，包括：
收发模块，用于接收来自第二通信装置的参考信号，参考信号对应多个参考信号端口；
处理模块，用于根据参考信号确定多个参考信号端口的信道信息；根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；
收发模块，还用于向第二通信装置发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括该N个等效端口在第一权值下的信道状态信息。
本申请第七方面提供一种第二通信装置，包括：
收发模块，用于向终端设备发送参考信号，参考信号对应多个参考信号端口；接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息；N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个第一端口组与N个等效端口一一对应，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数。
基于第七方面，一种可能的实现方式中，N个第一端口组的信道信息是根据参考信号确定的。
本申请第八方面提供一种第二通信装置，包括：
收发模块，用于向第一通信装置发送参考信号，参考信号对应多个参考信号端口；接收来自第一通信装置的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息；N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个等效端口与所述N个等效端口一一对应，N个第一端口组的信道信息是根据多个参考信号端口的信道信息确定的，多个参考信号端口的信道信息是根据参考信号确定的，N为大于或等于1的整数。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，N个等效端口在第一权值下的信道状态信息包括第一PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；第一信道状态信息包括第一基底的索引和第一系数，第一系数是根据N个等效端口在第一权值下的预编码矩阵和第一基底确定的，第一基底为空域基底、频域基底、或者空频联合基底。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一信道状态信息包括频域基底的索引和N个等效端口中的M个等效端口在第一权值下的预编码权值对应的第二系数，第二系数是根据M个等效端口在第一权值下的预编码权值和频域基底确定的，M大于或等于1且小于N。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一信道状态信息还包括以下至少一项：第一CQI、第一RI；其中，第一CQI用于指示N个等效端口在第一权值下对应的信道质量，第一RI用于指示N个等效端口在第一权值下对应的信道的秩。
基于第五方面或第六方面，一种可能的实现方式中，处理模块还用于：
根据R个第二权值和N个第一端口组的信道信息确定N个等效端口在R个第二权值中各个第二权值下的信道状态信息，R为大于或等于1的整数；第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息和N个等效端口在R个权值中的X个第二权值中各个第二权值下的信道状态信息确定的，X为大于或等于1且小于或等于R的整数。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一信道状态信息包括第一PMI和X个第二PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；N个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵；该X个第二PMI属于该R个第二PMI。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，N个等效端口在第一权值下的信道 状态信息包括第一PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵；
N个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与所述R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵；第一信道状态信息包括第三系数、X个第四系数以及第二基底的索引；其中，第三系数是根据N个等效端口在所述第一权值下的预编码矩阵和第二基底确定的，X个第四系数与R个第二PMI中的X个第二PMI一一对应，X个第四系数中的一个第四系数是根据第四系数对应的第二PMI所指示的预编码矩阵和第二基底投影确定的，第二基底为空域基底、频域基底或空频联合基底。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一信道状态信息还包括第八系数、第三基底的索引、X个第九系数和X个第九系数分别对应的基底的索引；
其中，第八系数是根据N个等效端口在第一权值下的预编码矩阵和第三基底确定的，X个第九系数与该X个第二PMI一一对应，X个第九系数中的一个第九系数是根据该第九系数对应的第二PMI所指示的预编码矩阵和该第九系数对应的基底确定的；该第三基底为空域基底、频域基底或空频联合基底，该X个第九系数分别对应的基底为空域基底、频域基底或空频联合基底。
基于第五方面或第六方面，一种可能的实现方式中，收发模块还用于：
接收来自第二通信装置的第一配置信息；第一配置信息用于指示P个第二端口组，N个第一端口组是根据P个第二端口组确定的。
基于第七方面或第八方面，一种可能的实现方式中，收发模块还用于：
向第一通信装置发送第一配置信息；第一配置信息用于指示P个第二端口组，N个第一端口组是根据P个第二端口组确定的。
基于第五方面，一种可能的实现方式中，处理模块具体用于：根据第一配置信息确定P个第二端口组；根据所述预设规则和P个第二端口组确定N个第一端口组。
基于第六方面，一种可能的实现方式中，处理模块具体用于：根据第一配置信息和多个参考信号端口的信道信息确定P个第二端口组的信道信息；根据预设规则和P个第二端口组的信道信息确定N个第一端口组的信道信息。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一配置信息包括多个参考信号端口的数量和多个参考信号端口采用的码分复用类型；P的取值为以下任一项：
多个参考信号端口的数量与码分复用类型所指示的采用时域码分的参考信号端口的数量的比值；或者，码分复用类型所指示的采用时域码分的参考信号端口的数量；或者，多个参考信号端口的数量与码分复用组的数量的比值，码分复用组的数量等于多个参考信号端口的数量与码分复用类型所指示的每个码分复用组包括的参考信号端口数的比值；或者，码分复用组数量与所述码分复用类型所指示的采用时域码分的参考信号端口的数量的积；或者，码分复用组数量。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，P个第二端口组中的参考信号端口是基于P个第二端口组的数量按照参考信号端口的端口号从小到大将多个参考信号端口均分得到的。
基于第五方面或第六方面，一种可能的实现方式中，收发模块还用于：接收来自第二通信装置的第二配置信息，第二配置信息用于配置第一权值。
基于第七方面或第八方面，一种可能的实现方式中，收发模块还用于：向第一通信装置发送第二配置信息，第二配置信息用于配置第一权值。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一权值为第一通信装置确定的。
基于第五方面或第六方面，一种可能的实现方式中，第一权值是第一通信装置从码本集合中选择的第一码本；收发模块还用于：向第二通信装置发送指示信息，指示信息用于指示第一码本；或者，指示信息用于指示第一权值对应的波束指向，第一权值对应的波束指向用于第二通信装置确定第一码本。
基于第七方面或第八方面，一种可能的实现方式中，第一权值是第一通信装置从码本集合中选择的第一码本；收发模块还用于：接收来自第一通信装置的指示信息，指示信息用于指示第一码本；或者，指示信息用于指示第一权值对应的波束指向，第一权值对应的波束指向用于第二通信装置确定所第一码本。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，多个参考信号端口中，第一部分参 考端口对应第一极化方向，第二部分参考信号端口对应第二极化方向；其中，第一部分参考信号端口为多个参考信号端口中参考信号端口的端口号较小的前一半参考信号端口，第二部分参考信号端口为多个参考信号端口中参考信号端口的端口号较大的后一半参考信号端口。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，一个等效端口对应一个数字端口，不同等效端口对应不同的数字端口。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，多个参考信号端口中每个参考信号端口对应一个模拟端口，不同参考信号端口对应不同模拟端口。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一配置信息包括多个参考信号端口的数量、多个参考信号端口采用的码分复用类型以及第五系数；P的取值为以下任一项：多个参考信号端口的数量除以码分复用类型所指示的采用时域码分的参考信号端口的数量与第五系数之和；或者，码分复用类型所指示的采用时域码分的参考信号端口的数量除以第五系数；或者，多个参考信号端口的数量除以码分复用组数量，码分复用组数量等于多个参考信号端口的数量除以码分复用类型所指示的每个码分复用组包括的参考信号端口数与第五系数之和；或者，码分复用组数量乘以码分复用类型所指示的采用时域码分的参考信号端口的数量再除以第五系数；或者，码分复用组数量除以第五系数。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一配置信息包括第六系数X，第六系数用于指示P个第二端口组中每个第二端口组包括X个参考信号端口，且P个第二端口组中第i个第二端口组包括所述多个参考信号端口中从第X*i个参考信号端口开始的且包括第X*i个参考信号端口的端口号连续的X个参考信号端口，i为大于或等于1且小于或等于P的整数，P为大于或等于1的整数。
基于第五方面至第八方面中任一方面，一种可能的实现方式中，第一配置信息包括第七系数R，第七系数R用于指示P个第二端口组中每个第二端口组中包括任意两个端口号相邻的参考信号端口的端口号的差值为R，且P个第二端口组中第i个第二端口组中的参考信号端口的端口号为i-1的整数倍，i为大于或等于1的整数且小于或等于所述P，R为大于或等于1的整数。
本申请第九方面提供一种通信装置，通信装置包括处理器。该处理器用于调用并运行存储器中存储的计算机程序，使得处理器实现如第一方面至第四方面中任一方面中的任意一种实现方式。
可选的，该通信装置还包括收发器；该处理器还用于控制该收发器收发信号。
可选的，该通信装置包括存储器，该存储器中存储有计算机程序。
本申请第十方面提供一种包括指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得该计算机执行如第一方面至第四方面中任一方面中任一种的实现方式。
本申请第十一方面提供一种计算机可读存储介质，包括计算机指令，当该计算机指令在计算机上运行时，使得计算机执行如第一方面至第四方面中任一方面中的任一种实现方式。
本申请第十二方面提供一种芯片装置，包括处理器，用于与存储器相连，调用该存储器中存储的程序，以使得该处理器执行上述第一方面至第四方面中任一方面中的任一种实现方式。
本申请第十三方面提供一种通信系统，该通信系统包括如第五方面所示的第一通信装置和如第六方面所示的第二通信装置，或者，该通信系统包括如第七方面所示的第一通信装置和如第八方面所示的第二通信装置。
从以上技术方案可以看出，本申请实施例具有以下优点：
经由上述技术方案可知，终端设备接收来自网络设备的参考信号，该参考信号对应多个参考信号端口。终端设备根据多个参考信号端口确定N个第一端口组，该多个参考信号端口包括N个第一端口组的所有参考信号端口，该N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；终端设备向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息。由此可知，终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息。该N个第一端口组的信道信息是更为完整的信道信息。终端设备可以根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下 的信道状态信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。
附图说明
图1为本申请实施例通信系统的一个示意图；
图2为本申请实施例通信系统的另一个示意图；
图3为本申请实施例DBF架构的一个结构示意图；
图4为本申请实施例ABF架构的一个结构示意图；
图5为本申请实施例HBF架构的第一种结构示意图；
图6为本申请实施例HBF架构的第二种结构示意图；
图7a为本申请实施例网络设备通过波束1发送参考信号的一个示意图；
图7b为本申请实施例网络设备通过波束2发送参考信号的一个示意图；
图7c为本申请实施例网络设备通过波束3发送参考信号的一个示意图；
图8为本申请实施例信道状态信息发送方法、信道状态信息接收方法的一个实施例示意图；
图9为本申请实施例HBF架构的第三种结构示意图；
图10为本申请实施例八个参考信号端口上加载的正交码的一种示意图；
图11a为本申请实施例信道状态信息发送方法、信道状态信息接收方法的第一个场景示意图；
图11b为本申请实施例信道状态信息发送方法、信道状态信息接收方法的第二个场景示意图；
图11c为本申请实施例信道状态信息发送方法、信道状态信息接收方法的第三个场景示意图；
图12为本申请实施例通信装置的第一种结构示意图；
图13为本申请实施例通信装置的第二种结构示意图；
图14为本申请实施例通信装置的第三种结构示意图；
图15为本申请实施例通信装置的第四种结构示意图；
图16为本申请实施例通信装置的第五种结构示意图。
具体实施方式
本申请实施例提供了一种信道状态信息发送方法、信道状态信息接收方法和装置，用于提升网络设备获取信道状态信息的效率。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。
在本申请的描述中，除非另有说明，“/”表示“或”的意思，例如，A/B可以表示A或B。本文中的“和/或”仅仅是一种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这三种情况。此外，“至少一个”是指一个或多个，“多个”是指两个或两个以上。“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，或c中的至少一项(个)，可以表示：a，b，c；a和b；a和c；b和c；或a和b和c。其中a，b，c可以是单个，也可以是多个。
本申请实施例的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)系统或新无线(new radio，NR)、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)、5G网络之后的移动通信系统(例如，6G移动通信系统)、车联网(vehicle to everything，V2X)通信系统等。
本申请适用的通信系统包括终端设备和网络设备。下面对本申请的终端设备和网络设备进行介绍。
终端设备可以是能够接收网络设备调度和指示信息的无线终端设备。无线终端设备可以是指向用户提供语音和/或数据连通性的设备，或具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。
终端设备，又称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、客户终端设备(customer-premises equipment，CPE)等，是包括无线通信功能(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、或车载设备等。目前，一些终端设备的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，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、车联网中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)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、或智慧家庭(smart home)中的无线终端等。例如，车联网中的无线终端可以为车载设备、整车设备、车载模块、车辆等。工业控制中的无线终端可以为摄像头、机器人等。智慧家庭中的无线终端可以为电视、空调、扫地机、音箱、机顶盒等。
网络设备可以无线网络中的设备。例如，网络设备是部署在无线接入网中为终端设备提供无线通信功能的设备。例如，网络设备可以为将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点，又可以称为接入网设备。
网络设备包括但不限于：全球移动通信系统(global system for mobile communication，GSM)、码分多址(code division multiple access，CDMA)网络中的基站收发信台(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的节点B(Node B，NB)；还可以是演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、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移动通信系统中的网络设备。例如，新空口(new radio，NR)系统中的下一代基站(next generation NodeB，gNB)，传输接收点(transmission reception point，TRP)，传输点(transmission point，TP)；或者，5G移动通信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，网络设备还可以为构成gNB或传输点的网络节点。例如，基带单元(baseband unit，BBU)，或，分布式单元(distributed unit，DU)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、媒体接入控制(media 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。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。因此在该架构下，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AAU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节点中一个或多个的设备。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。
下面介绍本申请适用的两种可能的通信系统。对于其他通信系统本申请仍适用，具体本申请不做限定。
图1为本申请实施例通信系统的一个示意图。请参阅图1，通信系统包括至少一个网络设备和至少一个终端设备。如图1所示，网络设备100、终端设备101和终端设备102。网络设备100可以分别与终端设备101和终端设备102进行通信传输。
图2为本申请实施例通信系统的另一个示意图。请参阅图2，通信系统包括至少一个网络设备和至少一个终端设备。如图2所示，终端设备201、网络设备202、网络设备203、和网络设备204。终端设备201可以与多个网络设备之间进行通信传输，实现多个网络设备为一个终端设备提供通信服务。
在通信系统中，网络设备通常都会使用大规模天线阵列发射信号。实现网络设备通过较高的天线阵列增益对抗频段升高带来的路径损耗，提升覆盖能力。从网络设备的实现方式来看，按照波束成形的实现方案大致可以分为三种阵列加权方式，分别为DBF、ABF以及HBF。
下面分别介绍DBF架构、ABF架构和HBF架构。
图3为本申请实施例DBF架构的一个结构示意图。请参阅图3，DBF架构中，每一个天线单元或每一组天线单元连接一个数字模拟转换器，一个数字模拟转换器连接一个数字端口。该天线单元包括发送天线。在DBF架构下，网络设备对每个数字端口上的天线信号在数字域上进行加权。例如，如图3所示，网络设备通过数字模拟转换器1对数字端口0上的数字域信号转换为模拟域信号，再通过数字模拟转换器1连接的一个天线单元或一组天线单元发送加权后的模拟域信号。通常情况下，图3所示的架构可以应用于低频通信系统中。
图4为本申请实施例ABF架构的一个结构示意图。请参阅图4，每一个天线单元或每一组天线单元连接一个移相器。该天线单元包括发送天线。多个或多组天线单元分别连接的移相器并联连接一个数字模拟转换器。也就是天线阵列只对应一个数字模拟转换器，该数字模拟转换器对应一个数字端口。
该多个或多组天线单元分别连接的移相器上加载的权值决定了波束成形后的波束方向。在ABF架构中，各个移相器应当配置相应的权值。数字模拟转换器输出的信号经过移动器进行加权，再通过对应的天线单元发射出去。对应的天线单元发射的信号是波束成形后的波束方向上的信号。该波束成形后的波束方向指向目标终端设备。
图5为本申请实施例HBF架构的一个结构示意图。HBF架构包括多个数字端口。图5中以DBF架构包括三个数字端口(数字端口0至数字端口3)为例进行介绍。如图5所示，
每一个天线单元或每一组天线单元连接一个移相器。该天线单元包括发送天线。其中，移相器1和移相器2并联连接数字模拟转换器1。移相器3和移相器4并联连接数字模拟转换器2。移相器5和移相器6并联连接数字模拟转换器3。第一个天线单元或第一组天线单元和第二个天线单元或第二组天线单元构成天线子阵1。第三个天线单元或第三组天线单元和第四个天线单元或第四组天线单元构成天线子阵2。第五个天线单元或第五组天线单元和第六个天线单元或第六组天线单元构成天线子阵3。每个数字端口对应两个移相器。由图5可知，每个数字端口驱动一个天线子阵。例如，数字端口0驱动天线子阵1，数字端口2驱动天线子阵2，数字端口3驱动天线子阵3。相比于ABF架构，天线阵列的规模相同的情况下，每个数字端口驱动的天线子阵规模较高，因此网络设备通过该数字端口对应的两个移相器加权得到的信号对应的波束更宽，可靠性更好，波束扫描开销也更小。
可选的，在HBF架构下，数字端口和移相器之间的比例是根据通信系统采用的频段和系统设计需求确定的。例如，在高频通信系统中，数字端口的数量可以较少(例如，数字端口的数量可以为4至16个)，每个数字端口对应的移相器较多(例如，每个数字端口对应16至32个移相器)。而在低频通信系统中，数字端口的数量可以较多(例如，数字端口的数量可以为32至128个)，每个数字端口对应的移相器可以较少(例如，每个数字端口对应2至10个移相器)。
图6为本申请实施例HBF架构的另一个结构示意图。相比于图5所示的HBF架构，图6所示的HBF架构中，网络设备可以通过降维的方式对数字端口进行降维。如图6所示，网络设备通过降维的方式可以将数字端口0至数字端口5转换为三个降维后的数字端口。该三个降维后的数字端口分别连接一个数字模拟转换器。
本申请中，一个数字模拟转换器可以对应一个或多个数字端口。例如，如图5所示，每个数字模拟转换器对应一个数字端口。如图6所示，每个数字模拟转换器对应两个数字端口。
本申请中，每个数字端口连接的移相器中，一个或多个移相器对应一个模拟端口。也可以将该模拟 端口称为该数字端口对应的模拟端口。每个模拟端口对应一个参考信号端口，不同模拟端口对应不同参考信号端口。也就是网络设备将多个参考信号端口中各个参考信号端口分别映射到相应的模拟端口上。一个数字端口对应至少两个模拟端口，或者说，一个数字端口对应至少两个参考信号端口。
例如，如图5所示，多个参考信号端口分别为参考信号端口0至参考信号端口5。数字端口0对应参考信号端口0和参考信号端口1。数字端口1对应参考信号端口2和参考信号端口3。数字端口2对应参考信号端口4和参考信号端口5。例如，如图4所示，网络设备将移相器1、移相器2和移相器3虚拟为模拟端口1，而将移相器4、移相器5和移相器6虚拟为模拟端口2。也就是三个移相器对应一个模拟端口。图4所述的数字端口对应该模拟端口1和模拟端口2。
对于ABF和HBF来说，只有当波束对准了通信目标(即目标终端设备)时，设备之间进行通信的信号质量才更好。对于某个终端设备来说，网络设备为该终端设备选择波束的过程可以称为波束扫描或波束训练。
波束扫描是网络设备使用不同波束分别发送参考信号，终端设备分别对参考信号进行测量并反馈测量结果。从而协助网络设备确定信号质量最好的波束，并选择该信号质量最好的波束用于网络设备与终端设备的通信传输。例如，如图7a所示，网络设备通过波束1发送参考信号。终端设备通过该参考信号测量得到波束1的信道状态信息。如图7b所示，网络设备通过波束2发送参考信号。终端设备通过该参考信号测量得到波束2的信道状态信息。如图7c所示，网络设备通过波束3发送参考信号。终端设备通过该参考信号测量得到波束3的信道状态信息。
上述技术方案中，针对每个波束，网络设备都需要单独发送相应的参考信号。终端设备对每个波束上的参考信号进行测量并反馈相应的信道状态信息。也就是网络设备在同一时刻只能选择一个波束并发送相应的参考信号。不同波束的参考信号只能采用时分的发送方式发送。导致网络设备获取信道状态信息的效率较低。
进一步的，网络设备需要配置多个资源，每个资源对应一个波束。终端设备对各个资源进行测量，并反馈相应的信道状态信息。由于可知，如果多个波束需要测量，网络设备需要配置多个资源，导致资源开销较大。
进一步的，网络设备需要在多个资源上分别发送参考信号。也就是网络设备需要多次发送参考信号。从而导致网络设备发送次数较多，带来较多的发送能耗。而终端设备需要在多个资源分别进行测量，并分别反馈相应的信道状态信息。导致终端设备测量次数较多，给终端设备带来较大的功耗损失。另一方面，终端设备需要分别上报多个资源上分别测量得到的信道状态信息，导致终端设备的反馈开销较大。
本申请提供了相应的技术方案，用于提升网络设备获取信道状态信息的效率。进一步的，用于降低测量资源的开销和反馈开销，减少终端设备的测量次数，降低终端设备的功耗损失。具体请参阅后文图8所示的实施例的相关介绍。
下面对本申请涉及的技术术语进行介绍。
1、波束(beam)：波束是一种通信资源。波束可以是宽波束，或者窄波束，或者其他类型波束，形成波束的技术可以是波束成形技术或者其他技术手段。波束成形技术可以具体为数字波束成形技术、模拟波束成形技术和混合数字/模拟波束成形技术。不同的波束可以认为是不同的资源。
波束在NR协议中可以称为空域滤波器(spatial domain filter)，空间滤波器(spatial filter)，空域参数(spatial domain parameter)，空间参数(spatial parameter)，空域设置(spatial domain setting)，空间设置(spatial setting)，准共址(quasi-colocation,QCL)信息，QCL假设，或QCL指示等。波束可以通过TCI-state参数来指示，或者通过空间关系(spatial relation)参数来指示。因此，本申请中，波束可以替换为空域滤波器，空间滤波器，空域参数，空间参数，空域设置，空间设置，QCL信息，QCL假设，QCL指示，传输配置指示(transmission configuration indicator，TCI)状态(也可以称为TCI-state，具体包括上行TCI-state，下行TCI-state)，或空间关系等。上述术语之间也相互等效。波束也可以替换为其他表示波束的术语，本申请在此不作限定。本文中，TCI状态和TCI-state两个描述方式可以互相替换。
用于发送信号的波束可以称为发送波束(transmission beam，Tx beam)，空域发送滤波器(spatial domain transmission filter)，空间发送滤波器(spatial transmission filter)，空域发送参数 (spatial domain transmission parameter)，空间发送参数(spatial transmission parameter)，空域发送设置(spatial domain transmission setting)，或者空间发送设置(spatial transmission setting)。发送波束可以通过TCI-state来指示。
用于接收信号的波束可以称为接收波束(reception beam，Rx beam)，空域接收滤波器(spatial domain reception filter)，空间接收滤波器(spatial reception filter)，空域接收参数(spatial domain reception parameter)或者空间接收参数(spatial reception parameter)，空域接收设置(spatial domain reception setting)，或者空间接收设置(spatial reception setting)。
发送波束和接收波束都可以通过空间关系、传输配置指示(transmission configuration indicator，TCI)状态、探测参考信号(sounding reference signal，SRS)资源(表示使用该SRS的发送波束)中任一种来指示。因此，发送波束还可以替换为SRS资源。
发送波束可以是指信号经天线发射出去后在空间不同方向上形成的信号强度的分布，接收波束可以是指从天线上接收到的无线信号在空间不同方向上的信号强度分布。
此外，波束可以是宽波束，或者窄波束，或者其他类型的波束。形成波束的技术可以是波束赋形技术或者其他技术。波束赋形技术具体可以为数字波束赋形技术、模拟波束赋形技术、混合数字波束赋形技术、或者混合模拟波束赋形技术等。
波束一般和资源对应，例如进行波束测量时，网络设备通过不同的资源来测量不同的波束，终端设备反馈测得的资源质量，网络设备就知道对应的波束的质量。当数据传输时，波束信息也是通过其对应的资源来进行指示的。例如，网络设备通过下行控制信息(downlink control information，DCI)中的TCI字段指示用于传输终端设备的物理下行控制信道(physical downlink shared channel，PDSCH)的波束的信息。
在可能实现的一种方式中，将具有相同或者类似的通信特征的多个波束视为是一个波束。一个波束内可以包括一个或者多个天线端口，用于传输数据信道、控制信道和探测信号等。形成一个波束的一个或者多个天线端口也可以看作是一个天线端口集。
2、资源是一个配置信息单元，包括一个参考信号的相关参数。例如，发送周期，采用的时频资源位置等。每个波束对应一个资源，网络设备通过一个资源对应的波束发送该资源对应的参考信号。终端设备通过测量该参考信号可以确定该波束或该资源的质量。因此，在波束测量中，可以通过资源的索引来唯一标识该资源对应的波束。资源可以是上行信号的资源，也可以下行信号的资源。
资源通过RRC信令配置。在配置结构上，一个资源是一个数据结构，包括其对应的上行信号或下行信号的相关参数。例如，对于上行信号来说，资源包括上行信号的类型、承载上行信号的资源粒、上行信道的发送时间和周期和发送上行信号所采用的端口等。对于下行信号来说，资源包括下行信号的类型、承载下行信号的资源粒、下行信号的发送时间和周期和发送下行信号所采用的端口数等。每一个上行信号的资源或每个下行信号的资源具有唯一的索引，用于标识该资源。可以理解的是，资源的索引也可以称为资源的标识，本申请实施例对此不作任何限制。
3、信道状态信息(channel state information，CSI)：在无线通信系统中，由接收端(如终端设备)向发送端(如网络设备)上报的用于描述发送端与接收端之间的无线通信链路的信道属性的信息。CSI中可以包括但不限于，预编码矩阵指示(PMI)、秩指示(rank indicator，RI)、信道质量指示(channel quality indicator，CQI)、信道状态信息参考信号(channel state information reference signal，CSI-RS资源指示(CSI-RS resource indicator，CRI)以及层指示(layer indicator，LI)等。
4、PMI：用于指示预编码矩阵。其中，该预编码矩阵例如可以是终端设备基于各个频域单元(如，一个频域单元的频域长度可以是子带，或者是一个资源块(resource block，RB)，或者是子带的R倍，R<＝1，R的取值可以为1或1/2)的信道矩阵确定的预编码矩阵。该信道矩阵可以是终端设备通过信道估计等方式或者基于信道互易性确定。但应理解，终端设备确定预编码矩阵的具体方法并不限于上文所述方法，这里不再一一列举。
例如，预编码矩阵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，这里不再一一列举。
需要说明的是，该预编码矩阵可以直接用于下行数据传输；也可以经过一些波束成形方法，例如包括迫零(zero forcing，ZF)、正则化迫零(regularized zero-forcing，RZF)、最小均方误差(minimum mean-squared error，MMSE)、最大化信漏噪比(signal-to-leakage-and-noise，SLNR)等，以得到最终用于下行数据传输的预编码矩阵。本申请对此不作限定。在未作出特别说明的情况下，下文中所涉及的预编码矩阵均可以是指基于本申请提供的方法所确定的预编码矩阵。
可以理解的是，终端设备所确定的预编码矩阵可以理解为待反馈的预编码矩阵。终端设备可以通过PMI指示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。可以理解，网络设备基于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。
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信道状态相适配，因此也就能够提高信号的接收质量。
5、天线端口：可以理解为被接收设备所识别的发射天线，或可以被发射设备所识别的接收天线；或者，在空间上可以区分的发射天线或接收天线，这里可以称为物理天线。
6、参考信号端口：一个参考信号端口可以理解为一个虚拟天线或逻辑天线，可以是多个物理天线的加权组合，其加权系数与在参考信号上加载的预编码矩阵有关。如果参考信号上加载的预编码矩阵可以是单位阵，此时针对每个虚拟天线配置了一个天线端口，每个虚拟天线对应一根物理天线，每个天线端口可以与一个参考信号或一个参考信号端口对应。如果参考信号上加载的预编码矩阵不是单位阵，此时针对一个虚拟天线配置了多个天线端口，一个虚拟天线对应多根物理天线，多个天线端口可以与一个参考信号或一个参考信号端口对应。例如，若参考信号为CSI-RS，那么参考信号端口可以称为CSI-RS端口；若参考信号为解调参考信号(demodulation reference signal，DMRS)，那么参考信号端口可以称为DMRS端口。
7、频域单元：频域资源的单位，可表示不同的频域资源粒度。频域单元例如可以包括但不限于，一个子带(subband)、一个资源块(resource block，RB)、一个子载波、一个资源块组(resource block group,RBG)或一个预编码资源块组(precoding resource block group，PRG)等。此外，一个频域单元的频域长度还可以是CQI子带的Y倍，Y<＝1，Y的取值可以为1或1/2。
8、空域基向量：也可以称为波束向量、空域向量、空域波束基向量。一个或多个空域基向量构成空域基底。每个空域基向量对应发射端设备的一个发射波束，空域基向量中各个元素可以表示为各个天线端口的权重。基于空域基向量中各个元素所表示的各个天线端口的权重，将各个天线端口的信号做线性叠加，可以在空间某一个方向上形成信号较强的区域。可选的，空域基向量取自二维离散傅里叶变换(discrete fourier transform，DFT)矩阵。该二维DFT矩阵中每个列向量可以称为二维DFT向量。换句话说，空域基向量可以为二维DFT向量，二维DFT向量通常可以用于描述由水平方向的波束和垂直方向的波束叠加而成的波束。
9、空域基底：由一个或多个空域基向量构成的。
10、频域基向量：也可以称为频域向量，是可用于表示信道在频域上的变化规律的向量。一个或多个频域基向量构成频域基底。每个频域基向量可以表示一种变化规律。由于信号在经过无线信道传输时，从发射天线可以经过多个路径到达接收天线。多径时延导致频率选择性衰落，就是频域信道的变化。因此，可以通过不同频域基向量来表示不同传输路径上时延导致的信道在频域上的变化规律。可选的，频域基向量可以选择DFT矩阵或逆离散傅里叶变换(inverse discrete fourier transform，IDFT)矩阵。(即DFT矩阵的共轭转置矩阵)，换言之，频域基向量可以是DFT向量或IDFT向量。
频域基向量的长度可以由在上报带宽中预配置的待上报的频域单元的个数确定，也可以由该上报带宽的长度确定，还可以是协议预定义值。本申请对频域基向量的长度不做限定。其中，上报带宽可以是指通过高层信令(例如，RRC消息)中的CSI上报配置中携带的CSI上报带宽(CSI-ReportingBand)。
11、频域基底：由一个或多个频域基向量构成的。
12、空频基向量：由一个空域基向量和一个频域基向量唯一确定。例如，一个空频基向量可以是一个空域基向量和一个频域基向量通过克罗内克(Kronecker)积形成的向量。如果网络设备的发送天线 是单极化天线，一个空频基向量的行数为(M1×M2)×Nf且列数为1，或者行数为1且列数为(M1×M2)×Nf。其中M1为网络设备在水平方向上的发送天线端口数量，M2为网络设备在垂直方向上的发送天线端口数量，Nf为频域单元个数。应理解，如果网络设备的发送天线是双极化天线，那么一个空频基向量的行数为2×(M1×M2)×Nf且列数为1，或者行数为1且列数为2×(M1×M2)×Nf。
13、空频联合基底：由一个或多个空频基向量构成的。
14、参考信号的配置信息：包括该参考信号的相关参数。例如，该参考信号的发送周期、发送时间、采用的时频资源、参考信号的类型、发送参考信号采用的参考信号端口数、码分复用类型、码分复用组时频信息、码分复用组索引、码分复用组内的频域资源索引信息、码分复用组内的时域资源索引信息等。
14、本申请涉及的数学符号的相关定义包括：
AT：表示为矩阵A的转置。
AH：表示为矩阵A的共轭转置。
下面介绍码分复用类型的一些可能的形式。
一、noCDM，表示无码分复用。
二、频域码分：记作-FD#，或者fd-CDM#，#为一个数字，表示一个码分复用(code division multiple，CDM)组内有#个参考信号端口在频域上码分。
三、时域码分：记作-TD#，或者，td-CDM#，#为一个数字，表示一个CDM组内有#个参考信号端口在时域上码分。
上述码分复用类型可以组合。例如，cdm-FD2-TD2表示一个CDM组内包括4个参考信号端口，其中有两个参考信号端口上的正交码在频域上码分，以及有两个参考信号端口上的正交码在时域上码分。
下面结合具体实施例介绍本申请的技术方案。
图8为本申请实施例信道状态信息发送方法、信道状态信息接收方法的一个实施例示意图。请参阅图8，方法包括：
801、网络设备向终端设备发送参考信号，该参考信号对应多个参考信号端口。相应的，终端设备接收来自网络设备的参考信号。
可选的，该多个参考信号端口是参考信号的配置信息中配置的。网络设备可以通过该多个参考信号端口发送该参考信号。可选的，网络设备可以向终端设备发送该参考信号的配置信息，从而便于终端设备接收该参考信号。
可选的，该多个参考信号端口中每个参考信号端口对应一个模拟端口，不同参考信号端口对应不同的模拟端口。由前述介绍可知，一个数字端口对应的至少两个参考信号端口，不同数字端口对应不同的参考信号端口。一个数字端口上的数字信号可以通过该至少两个参考信号端口进行加权得到波束成形的波束方向上的信号。
可选的，该参考信号是在全维度方向上发送的。
一方面，网络设备可以在全维度方向上发送该参考信号。从而实现终端设备获取更完整的信道信息。另一方面，网络设备可以将多个参考信号端口中每个参考信号端口映射到一个模拟端口上，不同参考信号端口映射到不同的模拟端口上。从而便于终端设备获取到各个模拟端口上的信道信息。也就是各个参考信号端口上的信道信息。
下面介绍网络设备发送参考信号的一种可能的实现方式。对于其他实现方式本申请仍适用，具体本申请不做限定。
例如，如图9所示，参考信号对应八个参考信号端口，分别为参考信号端口0至参考信号端口7。网络设备采用cdm4-FD2-TD2的码分复用类型对参考信号端口上的信号进行处理。cdm 4-FD2-TD2表示一个CDM组内有4个参考信号端口，其中有两个参考信号端口在频域上码分正交，以及有两个参考信号端口在时域上码分正交。
如图10所示，网络设备将每个参考信号端口对应的正交码作为该参考端口连接的移相器的权值，并通过该移相器对该对参考信号端口上的信号进行加权处理。由图10可知，参考信号端口0对应的正交码与参考信号端口1对应的正交码在时域上码分正交。参考信号端口0对应的正交码与参考信号端口 2对应的正交码在频域上码分正交。参考信号端口2对应的正交码与参考信号端口3对应的正交码在频域上码分正交。参考信号端口4对应的正交码与参考信号端口5对应的正交码在时域上码分正交。参考信号端口4对应的正交码与参考信号端口6对应的正交码在频域上码分正交。参考信号端口6对应的正交码与参考信号端口7对应的正交码在频域上码分正交。也就是同一数字端口对应的参考信号端口中，不同参考信号端口对应的正交码在时域上码分正交。从而实现网络设备可以将多个参考信号端口中每个参考信号端口映射到一个模拟端口上。进一步的，终端设备接收到参考信号之后，终端设备可以通过每个参考信号端口的正交码解析得到每个参考信号端口上的信道信息。
可选的，参考信号为CSI-RS或DMRS。如果参考信号为CSI-RS，则参考信号端口可以称为CSI-RS端口。如果参考信号为DMRS，则参考信号端口可以称为DMRS端口。
可选的，该多个参考信号端口中，第一部分参考信号端口对应第一极化方向，第二部分参考信号端口对应第二极化方向。
其中，第一部分参考信号端口为多个参考信号端口中端口号较小的前一半参考信号端口。第二部分参考信号端口为多个参考信号端口中端口号较大的后一半参考信号端口。
例如，如图9所示，第一部分参考信号端口包括参考信号端口0至参考信号端口3。而第二部分参考信号端口包括参考信号端口4至参考信号端口7。网络设备在第一极化方向上通过参考信号端口0至参考信号端口3发送参考信号，在第二极化方向上通过参考信号端口4至参考信号端口7发送参考信号。从而实现终端设备对不同极化方向上的信道进行测量。
需要说明的是，第一部分参考信号端口和第二部分参考信号端口还可以是按照其他方式将多个参考信号端口进行划分得到的，上述示例不属于对本申请的限定，具体本申请不做限定。例如，第一部分参考信号端口为多个参考信号端口中端口号为奇数的参考信号端口。第二部分参考信号端口为多个参考信号端口中端口号为偶数的参考信号端口。
802、终端设备根据参考信号确定多个参考信号端口的信道信息。
具体的，终端设备可以通过该多个参考信号端口中每个参考信号端口对应的正交码和该参考信号确定该多个参考信号端口的信道信息。
例如，如图9所示，终端设备将接收到的参考信号乘以该参考信号端口0的正交码得到该参考信号端口0的信道信息。对于其他参考信号端口的信道信息同样类似，终端设备可以确定得到每个参考信号端口的信道信息。
803、终端设备根据多个参考信号端口的信道信息确定N个第一端口组的信道信息。
其中，该多个参考信号端口包括该N个第一端口组中的所有参考信号端口。N个第一端口组中不同第一端口组包括的参考信号端口不同。N为大于或等于1的整数。
需要说明的是，N个第一端口组中的所有参考信号端口可以是该多个参考信号端口也可以是该多个参考信号端口的真子集。具体本申请不做限定。
可选的，该N个第一端口组中每个第一端口组对应一个或多个数字端口，该一个或多个数字端口对应同一数字模拟转换器。
例如，如图5所示，N个第一端口组包括三个第一端口组。其中，第一个第一端口组包括参考信号端口0和参考信号端口1，第二个第一端口组包括参考信号端口2和参考信号端口3，第三个第一端口组包括参考信号端口4和参考信号端口5。
需要说明的是，可选的，N个第一端口组也可以由终端设备确定的，终端设备需上报N个第一端口组中每个第一端口组的分组信息。例如，每个第一端口组包括的参考信号端口或参考信号端口数等。网络设备根据终端设备上报的N个第一端口组中每个第一端口组的分组信息确定该N个第一端口组。
可选的，图8所示的实施例还包括步骤801a。步骤801a可以在步骤803之前执行。
801a、网络设备向终端设备发送第一配置信息。第一配置信息用于配置P个第二端口组。相应的，终端设备接收来自网络设备的第一配置信息。
N个第一端口组是根据预设规则和P个第二端口组确定的，P为大于或等于1的整数。
一种可能的实现方式中，预设规则包括：N个第一端口组与P个第二端口组一一对应，N个第一端口组为P个第二端口组。
例如，N个第一端口组为P个第二端口组。如图5所示，N个第一端口组包括三个第一端口组。其中，第一个第一端口组包括参考信号端口0和参考信号端口1，第二个第一端口组包括参考信号端口2和参考信号端口3，第三个第一端口组包括参考信号端口4和参考信号端口5。
另一种可能的实现方式中，预设规则包括：N个第一端口组中每个第一端口组对应P个第二端口组中多个第二端口组。
可选的，P个第二端口组中每个第二端口组的第一个参考信号端口构成N个第一端口组中的第一个第一端口组。P个第二端口组中每个第二端口组中的第二个参考信号端口构成N个第一端口组的第二个第一端口组。以此类推，每个第二端口组包括S个参考信号端口，S为大于或等于2的整数。P个第二端口组中每个第二端口组的第S个参考信号端口构成第N个第一端口组。
例如，如图5所示，P个第二端口组包括两个第二端口组。其中，第一个第二端口组包括参考信号端口0、参考信号端口2和参考信号端口4，第二个第二端口组包括参考信号端口1、参考信号端口3和参考信号端口5。而N个第一端口组包括三个第一端口组。其中，第一个第一端口组包括参考信号端口0和参考信号端口1，第二个第一端口组包括参考信号端口2和参考信号端口3，第三个第一端口组包括参考信号端口4和参考信号端口5。
下面介绍P个第二端口组的确定方式。
实现方式一、第一配置信息包括多个参考信号端口的数量和多个参考信号端口采用的码分复用类型。
下面结合上述预设规则的两种可能的实现方式介绍P的取值的一些可能的实现方式。
如果N个第一端口组为P个第二端口组，P的取值为以下任一项：
a、多个参考信号端口的数量与码分复用类型所指示的采用时域码分的参考信号端口的数量的比值。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2。因此可知，P等于4。
b、多个参考信号端口的数量与码分复用组的数量的比值，码分复用组的数量等于多个参考信号端口的数量除以码分复用类型所指示的每个码分复用组包括的参考信号端口数。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2，由此可知每个码分复用组包括4个参考信号端口。因此，码分复用组的数量为2，P等于4。
c、码分复用组数量乘以码分复用类型所指示的采用时域码分的参考信号端口的数量。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。由此可知，每个码分复用组包括4个参考信号端口。因此，码分复用组的数量为2。而该码分复用类型所指示的采用时域码分的参考信号端口的数量为2。因此，P等于4。
2、如果N个第一端口组中每个第一端口组对应P个第二端口组中多个第二端口组，P的取值为以下任一项：
a、码分复用类型所指示的采用时域码分的参考信号端口的数量。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。因此，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2，因此P等于2。
b、码分复用组数量。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。因此，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2，那么码分复用组的数量为2。因此，P等于2。
实现方式二、第一配置信息包括多个参考信号端口的数量、多个参考信号端口采用的码分复用类型和第五系数。
上述实现方式二中，实际应用中，并非该多个参考信号端口组成的第二端口组都在模拟域进行加权。因此，网络设备可以配置第五系数，从而终端设备可以通过该第五系数确定在模拟域进行了加权的P个第二端口组。
下面结合上述预设规则的两种可能的实现方式介绍P的取值的一些可能的实现方式。
如果N个第一端口组为P个第二端口组，P的取值为以下任一项：
a、多个参考信号端口的数量与码分复用类型所指示的采用时域码分的参考信号端口的数量和第五系数之和的比值。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2，第一系数为2。因此可知，P等于2。
b、多个参考信号端口的数量与码分复用组数量和第一系数之和的比值。
其中，码分复用组数量等于多个参考信号端口的数量与码分复用类型所指示的每个码分复用组包括的参考信号端口数的比值。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2，由此可知每个码分复用组包括4个参考信号端口。因此，码分复用组的数量为2，第一系数为2，P等于2。
c、码分复用组数量乘以码分复用类型所指示的采用时域码分的参考信号端口的数量再除以第五系数。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。由此可知，每个码分复用组包括4个参考信号端口。因此，码分复用组的数量为2。而该码分复用类型所指示的采用时域码分的参考信号端口的数量为2。第一系数为2，因此，P等于2。
2、如果N个第一端口组中每个第一端口组对应P个第二端口组中多个第二端口组，P的取值为以下任一项：
a、码分复用类型所指示的采用时域码分的参考信号端口的数量除以第五系数。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。由此可知，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2，第五系数为1，因此P等于2。
b、码分复用组数量除以第五系数。
例如，多个参考信号端口的数量为8，码分复用类型为cdm4-TD2-FD2。因此，该码分复用类型所指示的采用时域码分的参考信号端口的数量为2，那么码分复用组的数量为2，第五系数为2。因此，P等于1。
上述实现方式一和实现方式二中，网络设备可以通过参考信号的配置信息间接指示该P个第二端口组的数量。
需要说明的是，可选的，上述实现方式一和实现方式二中，P个第二端口组中的参考信号端口是基于P个第二端口组的数量按照参考信号端口的端口号从小到大或从大到小将多个参考信号端口均分得到的。例如，如图5所示，P个第二端口组中包括三个第二端口组。多个参考信号端口包括六个参考信号端口。因此，第一个第二端口组包括参考信号端口0和参考信号端口1。第二个第二端口组包括参考信号端口2和参考信号端口3。第三个第二端口组包括参考信号端口4和参考信号端口5。实际应用中，该P个第二端口组中的参考信号端口是基于P个第二端口组的数量按照参考信号端口的端口号的其他顺序将多个参考信号端口划分得到的，具体本申请不做限定。
实现方式三、第一配置信息包括第六系数X。第六系数用于指示P个第二端口组中每个第二端口组包括X个参考信号端口，且P个第二端口组中第i个第二端口组包括该多个参考信号端口从第X*i个参考信号端口开始的且包括该第X*i个参考信号端口的端口号连续的X个参考信号端口。i为大于或等于1且小于或等于P的整数。P为大于或等于1的整数。
该第六系数X表示该多个参考信号端口中按照端口号最小的参考信号端口开始，每X个连续端口号的参考信号端口对应一个第二端口组。
例如，如图9所示，该多个参考信号端口包括参考信号端口0至参考信号端口3。第六系数X等于4，那么参考信号端口0、参考信号端口1、参考信号端口2和参考信号端口3构成第一个第二端口组。参考信号端口4、参考信号端口5、参考信号端口6和参考信号端口7构成第二个第二端口组。也就是一共包括两个第二端口组。
实现方式四、第一配置信息包括第七系数Y，第七系数Y用于指示P个第二端口组中每个第二端口组中包括任意两个端口号相邻的参考信号端口的端口号的差值为Y，且P个第二端口组中第i个第二端口组中的参考信号端口的端口号为i-1的整数倍，i为大于或等于1的整数且小于或等于P，Y为大于或等于1的整数。
第七系数Y用于表示该多个参考信号端口中按照端口号最小的参考信号端口开始，间隔Y个参考信号端口的参考信号端口构成一个第二端口组。
例如，如图9所示，多个参考信号端口包括参考信号端口0至参考信号端口3。第七系数Y等于2，因此可知参考信号端口0和参考信号端口2构成第一个第二端口组，参考信号端口1和参考信号端口5构成第二个第二端口组，参考信号端口2和参考信号端口6构成第三个第二端口组，参考信号端口3和参考信号端口7构成第四个第二端口组。
由上述实现方式三和实现方式四可知，网络设备可以直接配置该P个第二端口组的数量。
基于上述步骤801a，可选的，上述步骤803具体包括步骤803a和步骤803b。
803a、终端设备根据第一配置信息和多个参考信号端口的信道确定P个第二端口组的信道信息。
例如，如图9所示，多个参考信号端口包括参考信号端口0至参考信号端口7。该P个第二端口组包括四个第二端口组。第一个第二端口组包括参考信号端口0和参考信号端口2。第二个第二端口组包括参考信号端口1和参考信号端口5。第三个第二端口组包括参考信号端口2和参考信号端口6。第四个第二端口组包括参考信号端口3和参考信号端口7。终端设备确定该P个第二端口组之后，终端设备可以将参考信号端口1的信道信息和参考信号端口2的信道信息确定为第一个第二端口组的信道信息。以此类推，终端设备将该参考信号端口3的信道信息和参考信号端口7的信道信息确定为第四个第二端口组的信道信息。
例如，如图9所示，多个参考信号端口包括参考信号端口0至参考信号端口7。该P个第二端口组包括两个第二端口组。第一个第二端口组中的参考信号端口的端口号为{0,2,4,6}，第二个第二端口组中的参考信号端口的端口号为{1,3,5,7}。那么终端设备可以将参考信号端口0的信道信息、参考信号端口2的信道信息、参考信号端口4的信道信息和参考信号端口6的信息构成第一个第二端口组的信道信息。终端设备可以将参考信号端口1的信道信息、参考信号端口3的信道信息、参考信号端口5的信道信息和参考信号端口7的信息构成第二个第二端口组的信道信息。
803b、终端设备根据预设规则和P个第二端口组的信道信息确定N个第一端口组的信道信息。
一种可能的实现方式中，预设规则包括N个第一端口组与P个第二端口组一一对应，也就是N个第一端口组为P个第二端口组。那么终端设备将该P个第二端口组的信道信息作为该N个第一端口组的信道信息。
另一种可能的实现方式中，预设规则包括N个第一端口组中每个第一端口组对应P个第二端口组中多个第二端口组。终端设备根据P个第二端口组的信道信息确定N个第一端口组的信道信息。
例如，如图9所示，多个参考信号端口包括参考信号端口0至参考信号端口7。该P个第二端口组包括两个第二端口组。第一个第二端口组中的参考信号端口的端口号为{0,2,4,6}，第二个第二端口组中的参考信号端口的端口号为{1,3,5,7}。那么终端设备可以将参考信号端口0的信道信息、参考信号端口2的信道信息、参考信号端口4的信道信息和参考信号端口6的信道信息构成第一个第二端口组的信道信息。终端设备可以将参考信号端口1的信道信息、参考信号端口3的信道信息、参考信号端口5的信道信息和参考信号端口7的信道信息构成第二个第二端口组的信道信息。而N个第一端口组包括4个第一端口组，第一个第一端口组中的参考信号端口的端口号为{0,2}，第二个第一端口组中的参考信号端口的端口号为{1,5}，第三个第一端口组中的参考信号端口的端口号为{2,6}，第四个第一端口组中的参考信号端口的端口号为{3,7}。那么终端设备可以从第一个第二端口组的信道信息中确定第一个第一端口组的信道信息，从第二个第二端口组的信道信息中确定第二个第一端口组的信道信息，从第一个第二端口组的信道信息中确定第三个第一端口组的信道信息，从第二个第二端口组的信道信息中第四个第一端口组的信道信息。
可选的，第一配置信息还可以包括网络设备的发送天线端口的维度。其中，发送天线端口的维度用于表征网络设备分别在水平方向的发送天线端口的数量和在垂直方向的发送天线端口的数量。从而便于终端设备采用合适的基底对PMI进行量化，提升终端设备上报的PMI的准确性。
如图9所示，发送天线端口的维度为2×4，代表网络设备在水平方向上有两个发送天线端口和垂直方向上有四个发送天线端口。应理解，网络设备的发送天线端口也可以是一维的，即在水平方向的发送天线端口数为1，或在垂直方向的发送天线端口数为1。
需要说明的是，上述步骤801a与步骤801至步骤802之间没有固定的执行顺序。例如，可以先执行步骤801a，再执行步骤801至步骤802；或者，先执行步骤801至步骤802，再执行步骤801a；或者， 依据情况同时执行步骤801a、步骤801至步骤802，具体本申请不做限定。
在另一种可能的实现方式中，上述步骤802至步骤803可以替换为：终端设备根据该多个参考信号端口确定N个第一端口组。具体的，终端设备将该多个参考信号端口划分为N个第一端口组。关于N个第一端口组请参阅前文的相关介绍。
基于上述步骤801a，可选的，终端设备根据该多个参考信号端口确定N个第一端口组具体包括：终端设备根据第一配置信息确定P个第二端口组；然后，终端设备根据预设规则和P个第二端口组确定N个第一端口组。
一种可能的实现方式中，预设规则包括N个第一端口组与P个第二端口组一一对应，也就是N个第一端口组为P个第二端口组。即终端设备将P个第二端口组作为N个第一端口组。
另一种可能的实现方式中，预设规则包括N个第一端口组中每个第一端口组对应P个第二端口组中多个第二端口组。终端设备根据P个第二端口组确定N个第一端口组。具体的确定过程与前述步骤803b的过程类似，可以参阅前述的相关介绍。
804、终端设备根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息。
其中，N个等效端口与N个第一端口组一一对应。N个第一端口组的信道信息是根据参考信号确定的。可选的，N个第一端口组的信道信息的确定过程可以参阅前述步骤802至步骤803的相关介绍。
例如，如图11a所示，第一权值为W1，N个第一端口组包括两个第一端口组，第一个第一端口组的参考信号端口的端口号为{0,1}，第二个第一端口组的参考信号端口的端口号为{2,3}。第一个第一端口组的信道信息表示为P1，第二个第一端口组的信道信息表示为P2。由于每个第一端口组包括两个参考信号端口，因此可知，第一权值W1为2维的列向量。N个第一等效端口包括两个等效端口，分别为等效端口1和等效端口2。终端设备根据第一权值W1对第一个端口组的信道信息进行加权得到等效端口1在第一权值W1的信道信息，以及通过第一权值W1对第二个第一端口组的信道信息进行加权得到等效端口2在第一权值W1的信道信息。具体如下述公式1和公式2所示：
P"1W1＝[W1]T*P1  公式1
P"2W1＝[W1]T*P2  公式2
其中，P"1W1为等效端口1在第一权值W1下的信道信息。P"2W1为等效端口2在第一权值W1下的信道信息。
然后，终端设备根据该等效端口1在第一权值W1下的信道信息确定该等效端口1在第一权值W1的信道状态信息。终端设备根据该等效端口2在第一权值W1下的信道信息确定该等效端口2在第一权值W1的信道状态信息。
由此可知，等效端口1在第一权值W1下的信道状态信息可以等同于终端设备测量参考信号1得到的数字端口1的信道状态信息。等效端口2在第一权值W1下的信道状态信息可以等同于终端设备测量参考信号1得到的数字端口2的信道状态信息。参考信号1是网络设备通过第一权值W1对应的波束发送的参考信号。
需要说明的是，第一权值的维度与每组第一端口组包括的参考信号端口的数量相同。例如，如图11a所示，每组第一端口组包括两个参考信号端口，因此第一权值可以为2维列向量。需要说明的是，第一权值也可以是矩阵，具体本申请不做限定。
可选的，图8所示的实施例还包括步骤804a，步骤804a可以在步骤805之前执行。
804a、终端设备根据R个第二权值和N个第一端口组的信道信息确定N个等效端口在R个第二权值中各个第二权值下的信道状态信息。
其中，R为大于或等于1的整数。
一种可能的实现方式中，该N个等效端口中一个等效端口对应一个数字端口，不同等效端口对应不同数字端口。例如，参考信号端口0和参考信号端口1经过加权得到等效端口0，该等效端口1对应数字端口0。参考信号端口2和参考信号端口3经过加权得到等效端口1，该等效端口1对应数字端口1。 参考信号端口4和参考信号端口5经过加权得到等效端口2，该等效端口2对应数字端口2。
另一种可能的实现方式中，该N个等效端口中一个等效端口对应多个数字端口，不同等效端口对应不同数字端口。例如，参考信号端口0和参考信号端口1经过加权得到等效端口0，该等效端口1对应数字端口0和数字端口1。参考信号端口2和参考信号端口3经过加权得到等效端口1，该等效端口1对应数字端口2和数字端口3。参考信号端口4和参考信号端口5经过加权得到等效端口2，该等效端口2对应数字端口4和数字端口5。
例如，第一权值为W1，R个第二权值包括第二权值W2和第二权值W3。如图11a至图11c所示，N个第一端口组包括两个第一端口组，第一个第一端口组的参考信号端口的端口号为{0,1}，第二个第一端口组的参考信号端口的端口号为{2,3}。N个第一等效端口包括两个等效端口，分别为等效端口1和等效端口2。第一个第一端口组的信道信息表示为P1，第二个第一端口组的信道信息表示为P2。由于每个第一端口组包括两个参考信号端口，第一权值和R个第二权值都为2维列向量。因此终端设备根据第一权值W1和R个第二权值W2分别对第一个第一端口组的信道信息进行加权得到等效端口1在第一权值W1和R个第二权值W2中各个权值下的信道信息。终端设备根据第一权值W1和R个第二权值分别对第二个第一端口组的信道信息进行加权得到等效端口2在第一权值W1和R个第二权值W2中各个权值下的信道信息。具体如下述公式3和公式4所示：
[P"1W1 P"1W2 P"1W3]＝[W1 W2 W2]T*P1   公式3
[P"2W1 P"2W2 P"2W3]＝[W1 W2 W2]T*P2   公式4
其中，P"1W1为等效端口1在第一权值W1下的信道信息。P"2W1为等效端口2在第一权值W1下的信道信息。P"1W2为等效端口2在第一权值W1下的信道信息。P"2W2为等效端口2在第二权值W2下的信道信息。P"1W3为等效端口2在第二权值W3下的信道信息。P"2W3为等效端口2在第二权值W3下的信道信息。
然后，终端设备根据等效端口1在第一权值W1和R个第二权值W2中各个权值下的信道信息确定等效端口1在第一权值W1和R个第二权值W2中各个权值下的信道状态信息。终端设备根据等效端口2在第一权值W1和R个第二权值W2中各个权值下的信道信息确定等效端口2在第一权值W1和R个第二权值W2中各个权值下的信道状态信息。
由此可知，如图11b所示，等效端口1在第二权值W2下的信道状态信息可以等同于终端设备测量参考信号2得到的数字端口1的信道状态信息。等效端口2在第二权值W2下的信道状态信息可以等同于终端设备测量参考信号2得到的数字端口2的信道状态信息。参考信号2是网络设备通过第二权值W2对应的波束发送的参考信号。如图11c所示，等效端口1在第二权值W3下的信道状态信息可以等同于终端设备测量参考信号3得到的数字端口1的信道状态信息。等效端口2在第二权值W3下的信道状态信息可以等同于终端设备测量参考信号3得到的数字端口2的信道状态信息。参考信号3是网络设备通过第二权值W3对应的波束发送的参考信号。
由此可知，终端设备获取到N个第一端口组的信道信息。该N个第一端口组的信道信息是更为完整的信道信息。终端设备可以通过各个权值获取到各个权值对应的波束的信道状态信息。有利于终端设备快速获取到各个波束的信道状态信息，并向网络设备反馈相应的信道状态信息。从而提升网络设备获取信道状态信息的效率。
进一步的，网络设备只需要通过该参考信号的资源发送参考信号，无需为了信道测量配置多个参考信号的资源，从而降低资源的开销以及网络设备发送参考信号带来的功耗损失。而终端设备通过测量该参考信号即可获得较为完整的信道信息，无需测量多个参考信号，从而降低了终端设备测量参考信号所带来的功耗损失。
805、终端设备向网络设备发送第一信道状态信息。相应的，网络设备接收来自终端设备的第一信道状态信息。
其中，第一信道状态信息包括该N个等效端口在第一权值下的信道状态信息。或者，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的。
下面介绍第一信道状态信息的两种可能的实现方式。对于其他方式本申请仍适用，具体本申请不做限定。
实现方式1：该N个等效端口在第一权值下的信道状态信息包括第一PMI，该第一PMI用于指示N个等效端口在第一权值下的预编码矩阵。第一信道状态信息包括第一基底的索引和第一系数。其中，该第一系数是根据N个等效端口在第一权值下的预编码矩阵和第一基底确定的。第一基底为空域基底、频域基底或者空频联合基底。
需要说明的是，本申请中，该N个等效端口在第一权值下的预编码矩阵中每个元素对应一个等效端口和一个频域单元，该元素表示该等效端口在该频域单元下的预编码权值。该预编码矩阵中的不同元素对应不同的等效端口和/或不同的频域单元。
具体的，第一系数是该N个等效端口在第一权值下的预编码矩阵在第一基底上投影得到的。
例如，如公式5所示，W为N个等效端口在第一权值下的预编码矩阵。Ws1为空域基底，Ws1的列数等于空域基向量的数量，Ws1的行数等于N。该空域基向量的数量可以是网络设备为终端设备配置的空域基向量的数量。Ws1中的列向量为空域基向量，W2为第一系数，W2中的第i个行向量对应的Ws1的第i个列向量，W2中的第i个行向量中的元素是否全为0可以等效为Ws1的第i个列向量是否上报。上述第一基底是由W2中的元素不为全0的行向量对应的Ws1的列向量组成的。i为大于或等于1且小于或等于空域基向量的数量。
W＝Ws1W2  公式5
例如，如公式6或公式7所示，W为N个等效端口在第一权值下的预编码矩阵。Wf1为频域基底，Wf1的列数等于频域基向量的数量，Wf1的行数等于频域单元的数量。频域基向量的数量可以是网络设备为终端设备的配置的频域基向量的数量。Wf1中的列向量为频域基向量。Ws1的列数等于空域基向量的数量，Ws1的行数等于N。空域基向量的数量可以是网络设备为终端设备配置的空域基向量的数量。Ws1中的列向量为空域基向量。W3为第一系数，W3的行数等于空域基向量的数量，列数等于频域基向量的数量。W3中的第i行第j列元素表示Ws1中的第i个空域基向量与Wf1中的第j个频域基向量对应的系数。Ws1中的第i个空域基向量是Ws1中的第i个列向量，Wf1中的第j个频域基向量是Wf1中的第j个列向量。i为大于或等于1且小于或等于空域基向量的数量，j为大于或等于1且小于或等于频域基向量的数量。W3中的第i行第j列元素是否为0可以等效于Ws1中的第i个空域基向量与Wf1中的第j个频域基向量对应的系数是否上报。上述第一基底是根据W3中的不为0的元素对应的Ws1中的空域基向量和对应的Wf1中的频域基向量确定的。

例如，如公式8或公式9所示，W为N个等效端口在第一权值下的预编码矩阵。Ws2的行数等于N，Ws2、Wf2的列数等于空频基向量的数量。Wf2的行数等于频域单元的数量。空频基向量的数量可以是网络设备为终端设备配置的空频基向量的数量。W4为第二系数，特别的，W4为对角矩阵，W4的行数和W4的列数都等于空频基向量的数量。W4中的第b个对角元素表示第b个空频基向量对应的系数，第p个空频基向量是Ws2的第b个列向量和Wf2中的第b个列向量确定的。b为大于或等于1且小于或等于空频基向量的数量。当W4中的第b个对角元素未上报时，默认该元素为0。也就是W4中的第b个对角元素是否为0可以等效于W4中的第b个对角元素对应的空频基向量是否上报。上述第一基底是根据W4中的不为0的对角元素对应的空频基向量确定的。

实现方式2：第一信道状态信息包括频域基底的索引、N个等效端口中的M个等效端口的索引以及该M个等效端口在第一权值下的预编码权值对应的第二系数，第二系数是根据M个等效端口在第一权值下的预编码权值和频域基底确定的，M大于或等于1且小于N。
其中，第二系数是M个等效端口在第一权值下的预编码权值在频域基底投影得到的。
实现方式2其实是实现方式1中示例的特殊形式。下面通过如公式10或公式11的示例介绍实现方式2。如下述公式10或公式11所示，W1表示该M个等效端口在第一权值下的预编码权值。Ws3为单位矩阵，Ws3中的每个列向量对应一个等效端口，不同列向量对应不同等效端口。W5中的第a行的元素是否全为0可以等效为Ws3中的第i个列向量对应的等效端口是否上报。a为大于或等于1且小于或等于N的整数。例如，W5中的第a行的元素全为0，表示不上报该Ws3中的第a个列向量对应的等效端口，从而实现从N个等效端口中选择M个等效端口。Wf3为频域基底，Wf3中的列向量为频域基向量。Wf3的行数等于频域单元的数量，Wf3的列数等于频域基向量的数量。W5中的第j列的元素是否全为0可以等效为Wf3的第j个列向量是否上报。j为大于或等于1且小于或等于频域基向量的数量。上述频域基底是Wf3中的元素不全为0的列向量对应的Wf3的频域基向量组成的。

例如，终端设备可以将第一PMI所指示的预编码矩阵投影到频域基底1上。其中，该频域基底1可以包括网络设备为终端设备配置的全部频域基向量。然后，终端设备选择该第一PMI所指示的预编码矩阵投影后投影能量最大的M个等效端口以及该M个等效端口上的X1个频域基向量。终端设备上报其选择的M个等效端口、频域基底2的索引以及该M个等效端口的预编码权值投影到频域基底2的第二系数。其中，频域基底2包括该X1个频域基向量，第二系数包括幅度和相位。
在该实现方式中，终端设备通过端口选择的方式上报该N个等效端口在第一权值下的信道状态信息。也就是终端设备选择上报M个等效端口在第一权值下的信道状态信息。
上述实现方式1和实现方式2中，可选的，第一信道状态信息还包括以下至少一项：第一CQI、第一RI。其中，第一CQI用于指示N个等效端口在第一权值下对应的信道质量。第一RI用于指示N个等效端口在第一权值下对应的信道的秩。
注意，上述示例描述仅用于协助理解，并不限定系数上报的具体形式，也不限定基底量化的具体计算方式，例如上述示例也可以等价写成终端设备上报的非零系数对应的空域基底、频域基底或空频基底的线性组合。
另一种可能的实现方式中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息和N个等效端口在R个第二权值中的X个第二权值中各个第二权值下的信道状态信息确定的。X为大于或等于1且小于或等于R的整数。
其中，X为网络设备与终端设备预先约定的默认值，或者，为网络设备为终端设备配置的，具体本申请不做限定。
可选的，第一信道状态信息包括第一PMI和X个第二PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵。N个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵。该X个第二PMI属于该R个第二PMI。
终端设备可以对第一PMI和X个第二PMI进行量化再上报给网络设备。可选的，N个等效端口在第一权值下的信道状态信息包括第一PMI，第一PMI用于指示N个等效端口在第一权值下的预编码矩阵。N 个等效端口在R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，R个第二PMI与R个第二权值一一对应，R个第二PMI中一个第二PMI用于指示N个等效端口在第二PMI对应的第二权值下的预编码矩阵。
第一信道状态信息包括第三系数、X个第四系数以及第二基底的索引。其中，第三系数是根据N个等效端口在第一权值下的预编码矩阵和第二基底确定的。X个第四系数与所述R个第二PMI中的X个第二PMI一一对应。X个第四系数中的一个第四系数是根据该第四系数对应的第二PMI所指示的预编码矩阵和第二基底确定的。第二基底为空域基底、频域基底或空频联合基底。
具体的，第三系数是N个等效端口在第一权值下的预编码矩阵在第二基底上投影得到的。X个第四系数中的一个第四系数是该第四系数对应的第二PMI所指示的预编码矩阵在第二基底上投影得到的。
需要说明的是，在该实现方式中，示出了终端设备将第二基底作为共享基底，将第一PMI和X个第二PMI分别投影到该第二基底得到相应的系数的方案。实际应用中，终端设备可以选择更多共享基底。然后，终端设备将第一PMI和X个第二PMI分别投影到该更多共享基底上得到相应的系数并上报。具体本申请不做限定。
在该实现方式中，进一步可选的，第一信道状态信息还包括第八系数、第三基底的索引、X个第九系数和X个第九系数分别对应的基底的索引。其中，第八系数是根据N个等效端口在第一权值下的预编码矩阵和第三基底确定的，X个第九系数与该X个第二PMI一一对应，X个第九系数中的一个第九系数是根据该第九系数对应的第二PMI所指示的预编码矩阵和该第九系数对应的基底确定的；该第三基底为空域基底、频域基底或空频联合基底，该X个第九系数分别对应的基底为空域基底、频域基底或空频联合基底。
具体的，第八系数是该N个等效端口在第一权值下的预编码矩阵在第三基底上投影得到的。X个第九系数中的一个第九系数是该第九系数对应的第二PMI所指示的预编码矩阵在该第九系数对应的基底上投影得到的。
需要说明的是，在该实现方式中，示出了终端设备将每个PMI所指示的预编码矩阵投影到一个基底的实现方式。实际应用中，终端设备可以为每个PMI选择更多基底，并将该PMI所指示的预编码矩阵投影到该更多基底上得到相应的系数并上报。具体本申请不做限定。
可选的，在该实现方式中，第一信道状态信息还包括以下至少一项：第一CQI、第一RI、X个第二CQI、或者X个第二RI。
关于第一CQI和第一RI请参阅前述的相关介绍。X个第二CQI与X个第二权值一一对应，该X个第二CQI中一个第二CQI用于指示N个等效端口在该第二CQI对应的第二权值下对应的信道质量。该X个第二RI与X个第二权值一一对应，该X个第二RI中的一个第二RI用于指示N个等效端口在该第二RI对应的第二权值下对应的信道的秩。
下面介绍终端设备获取第一权值的两种可能的实现方式。
下面介绍步骤801b介绍实现方式一。可选的，图8所示的实施例还包括步骤801b。步骤801b可以在步骤804之前执行。
801b、网络设备向终端设备发送第二配置信息。该第二配置信息用于配置第一权值。相应的，终端设备接收来自网络设备的第二配置信息。
在该实现方式一中，网络设备可以为终端设备配置该第一权值。
可选的，第二配置信息还用于配置该R个第二权值。
需要说明的是，步骤801b与步骤801a至步骤803之间没有固定的执行顺序。可以先执行步骤801b，再执行步骤801a至步骤803；或者，先执行步骤801a至步骤803，再执行步骤801b；或者，依据情况同时执行步骤801b、以及步骤801a至步骤803，具体本申请不做限定。
可选的，上述步骤801a和步骤801b可以是同一配置信息，也可以是不同的两个配置信息，具体本申请不做限定。
实现方式二：第一权值是终端设备确定的。可选的，第一权值是终端设备从码本集合中选择的第一码本。
其中，该码本集合是网络设备为终端设备配置的，或者，是通信协议规定的，具体本申请不做限定。
可选的，上述R个第二权值也可以是终端设备从该码本集合中选择的R个码本。
一种可能的实现方式中，该码本集合中的码本可以为DFT矩阵。
另一种可能的实现方式中，该码本集合中的码本可以按照一定量化精度反馈水平方向上的发送端口与垂直方向上的发送端口之间的相位差。
例如，网络设备为终端设备配置以下参数：N1、N2、O1、O2。
N1表示发送天线端口在水平方向上的维度，N2表示发送天线端口在垂直方向上的维度。相应的，O1表示发送天线端口在水平方向上的维度对应的过采样系数。O2表示发送天线端口在垂直方向上的维度对应的过采样系数。或者，
N1表示发送天线端口在垂直方向上的维度，N2表示发送天线端口在水平方向上的维度。相应的，O1表示发送天线端口在垂直方向上的维度对应的过采样系数。O2表示发送天线端口在水平方向上的维度对应的过采样系数。
需要说明的是，N1和N2分别所表示的维度由网络设备实现决定，具体本申请不做限定。
因此，终端设备反馈的第一码本的形式可以为vq,p，具体表示为：
其中，q和p的取值是终端设备确定的。例如，终端设备可以确定最优的(q，p)后反馈该最优的(q，p)。需要说明的是，仅当N2的取值大于1时，终端设备需要反馈p。
需要说明的是，终端设备在不同极化方向上都采用相同的码本。对于不同极化方向，通信协议中可以不显式体现。例如，第一部分参考端口对应第一极化方向，第二部分参考信号端口对应第二极化方向。第一部分参考信号端口多个参考信号端口中端口号较小的前一半参考信号端口。第二部分参考信号端口为多个参考信号端口中端口号较大的后一半参考信号端口。该第一部分参考信号端口和第二部分参考信号端口构成的多个第一端口组中每组第一端口组都采用第一码本进行加权。
可选的，图8所示的实施例还包括步骤805a，步骤805a可以在步骤804之后执行。
805a、终端设备向网络设备发送指示信息。其中，指示信息用于指示第一码本；或者，指示信息用于指示第一权值对应的波束指向，第一权值对应的波束指向用于网络设备确定第一码本。相应的，网络设备接收来自终端设备的指示信息。
例如，网络设备为终端设备配置如下天线阵列排布：水平方向上的发送天线端口之间的天线间距(例如，0.5波长)、垂直方向上的发送天线端口之间的天线间距、以及发送天线端口的维度。然后，终端设备可以上报在该天线阵列排布下该第一权值对应的波束指向。
需要说明的是，对于第一码本，终端设备还可以通过其他形式量化上报，具体本申请不做限定。例如，终端设备可以对第一码本中的元素的模和/或相位进行量化并上报。具体本申请不做限定。
需要说明的是，步骤805和步骤805a之间没有固定的执行顺序，可以先执行步骤805，再执行步骤805a；或者，先执行步骤805a，再执行步骤805；或者，依据情况同时执行步骤805和步骤805a，具体本申请不做限定。
本申请实施例中，终端设备通过该参考信号确定该多个参考信号端口的信道信息。该多个参考信号端口的信道信息是更为完整的信道信息。终端设备可以根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，再结合第一权值和N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息。从而实现终端设备获取到第一权值对应的波束的信道状态信息。对于终端设备来说，终端设备基于该参考信号可以获取到更为完整的信道信息。有利于终端设备快速获取到各个权值对应的波束的信道状态信息，并向网络设备反馈相应的信道状态信息。提升网络设备获取信道状态信息的效率。
下面对本申请实施例提供的通信装置进行描述。
图12为本申请实施例通信装置的第一种结构示意图。请参阅图12，通信装置可以用于执行图8所示的实施例中终端设备执行的过程，具体请参考上述方法实施例中的相关介绍。
通信装置1200包括处理模块1201和收发模块1202。收发模块1202可以实现相应的通信功能，处理模块1201用于进行数据处理。收发模块1202还可以称为通信接口或通信模块。
可选地，该通信装置1200还可以包括存储模块，该存储模块可以用于存储指令和/或数据，处理模块1201可以读取存储模块中的指令和/或数据，以使得通信装置实现前述方法实施例。
该通信装置模块1200可以用于执行上文图8所示的实施例中终端设备所执行的动作。该通信装置1200可以为终端设备或者可配置于终端设备的部件。处理模块1201用于执行上文图8所示的实施例中终端设备侧的处理相关的操作。可选的，收发模块1202用于执行上文图8所示的实施例中终端设备侧的接收相关的操作。
可选的，收发模块1202可以包括发送模块和接收模块。发送模块用于执行上述图8所示的实施例中的发送操作。接收模块用于执行上述图8所示的实施例中中的接收操作。
需要说明的是，通信装置1200可以包括发送模块，而不包括接收模块。或者，通信装置1200可以包括接收模块，而不包括发送模块。具体可以视通信装置1200执行的上述方案中是否包括发送动作和接收动作。该通信装置1200用于执行上文图8所示的实施例中终端设备所执行的动作。
一种可能的实现方式中，该通信装置1200用于执行如下方案：
收发模块1202，用于接收来自网络设备的参考信号，参考信号对应多个参考信号端口；
处理模块1201，用于根据参考信号确定多个参考信号端口的信道信息；根据多个参考信号端口的信道信息确定N个第一端口组的信道信息，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；
收发模块1202，还用于向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息。
另一种可能的实现方式中，该通信装置1200用于执行如下方案：
收发模块1202，用于接收来自网络设备的参考信号，参考信号对应多个参考信号端口；
处理模块1201，用于根据多个参考信号端口确定N个第一端口组，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数；根据第一权值和N个第一端口组的信道信息确定N个等效端口在第一权值下的信道状态信息，N个第一端口组与N个等效端口一一对应；
收发模块1202，还用于向网络设备发送第一信道状态信息，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息。
应理解，各模块执行上述相应过程的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
上文实施例中的处理模块1201可以由至少一个处理器或处理器相关电路实现。收发模块1202可以由收发器或收发器相关电路实现。收发模块1202还可称为通信模块或通信接口。存储模块可以通过至少一个存储器实现。
图13为本申请实施例通信装置的第二种结构示意图。请参阅图13，通信装置可以用于执行图8所示的实施例中网络设备执行的过程，具体请参考上述方法实施例中的相关介绍。
通信装置1300包括收发模块1301。可选的，通信装置1300还包括处理模块1302。收发模块1301可以实现相应的通信功能，处理模块1302用于进行数据处理。收发模块1301还可以称为通信接口或通信模块。
可选地，该通信装置1300还可以包括存储模块，该存储模块可以用于存储指令和/或数据，处理模块1302可以读取存储模块中的指令和/或数据，以使得通信装置实现前述方法实施例。
该通信装置1300可以用于执行上文图8所示的实施例中网络设备所执行的动作。该通信装置1300可以为网络设备或者可配置于网络设备的部件。处理模块1302用于执行上文图8所示的实施例中网络设备侧的处理相关的操作。可选的，收发模块1301用于执行上文图8所示的实施例中网络设备侧的接收相关的操作。
可选的，收发模块1301可以包括发送模块和接收模块。发送模块用于执行上述图8所示的实施例中的发送操作。接收模块用于执行上述图8所示的实施例中的接收操作。
需要说明的是，通信装置1300可以包括发送模块，而不包括接收模块。或者，通信装置1300可以包括接收模块，而不包括发送模块。具体可以视通信装置1300执行的上述方案中是否包括发送动作和接收动作。该通信装置1300用于执行上文图8所示的实施例中网络设备所执行的动作。
一种可能的实现方式中，该通信装置1300用于执行如下方案：
收发模块1301，用于向终端设备发送参考信号，参考信号对应多个参考信号端口；接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息，N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个等效端口与所述N个等效端口一一对应，N个第一端口组的信道信息是根据多个参考信号端口的信道信息确定的，多个参考信号端口的信道信息是根据参考信号确定的，N为大于或等于1的整数。
另一种可能的实现方式中，该通信装置1300用于执行如下方案：
收发模块1301，用于向终端设备发送参考信号，参考信号对应多个参考信号端口；接收来自终端设备的第一信道状态信息；其中，第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，或者，第一信道状态信息包括N个等效端口在第一权值下的信道状态信息，N个等效端口在第一权值下的信道状态信息是根据第一权值和N个第一端口组的信道信息确定的，N个第一端口组与N个等效端口一一对应，多个参考信号端口包括N个第一端口组的所有参考信号端口，N个第一端口组中不同第一端口组包括的参考信号端口不同，N为大于或等于1的整数。
应理解，各模块执行上述相应过程的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
上文实施例中的处理模块1302可以由至少一个处理器或处理器相关电路实现。收发模块1301可以由收发器或收发器相关电路实现。收发模块1301还可称为通信模块或通信接口。存储模块可以通过至少一个存储器实现。
图14为本申请实施例通信装置的第三种结构示意图。请参阅图14，该通信装置1400包括处理器1410，处理器1410与存储器1420耦合，存储器1420用于存储计算机程序或指令和/或数据，处理器1410用于执行存储器1420存储的计算机程序或指令和/或数据，使得上文方法实施例中的方法被执行。
可选地，该通信装置1400包括的处理器1410为一个或多个。
可选地，如图14所示，该通信装置1400还可以包括存储器1420。
可选地，该通信装置1400包括的存储器1420可以为一个或多个。
可选地，该存储器1420可以与该处理器1410集成在一起，或者分离设置。
可选地，如图14所示，该通信装置1400还可以包括收发器1430，收发器1430用于信号的接收和/或发送。例如，处理器1410用于控制收发器1430进行信号的接收和/或发送。
作为一种方案，该通信装置1400用于实现上文方法实施例中由终端设备执行的操作。
例如，处理器1410用于实现上文方法实施例中由终端设备执行的处理相关的操作，收发器1430用于实现上文方法实施例中由终端设备执行的收发相关的操作。
作为一种方案，该通信装置1400用于实现上文实施例中由网络设备执行的操作。
例如，处理器1410用于实现上文方法实施例中由网络设备执行的处理相关的操作，收发器1430用于实现上文方法实施例中由网络设备执行的收发相关的操作。
图15为本申请实施例通信装置的第四种结构示意图。请参阅图15，该通信装置1500可以为终端设备、终端设备的处理器、或芯片。该通信装置1500可以用于执行上述方法实施例中由终端设备所执行的操作。
当该通信装置1500为终端设备时，图15示出了一种简化的终端设备的结构示意图。如图15所示，终端设备包括处理器、存储器、以及收发器。存储器可以存储计算机程序代码，收发器包括发射机1531、接收机1532、射频电路(图中未示出)、天线1533以及输入输出装置(图中未示出)。
处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置。例如，触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图15中仅示出了一个存储器、处理器和收发器，在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发模块，将具有处理功能的处理器视为终端设备的处理模块。
如图15所示，终端设备包括处理器1510、存储器1520和收发器1530。处理器1510也可以称为处理单元，处理单板，处理模块、处理装置等，收发器1530也可以称为收发单元、收发机、收发装置等。
可选地，可以将收发器1530中用于实现接收功能的器件视为接收模块，将收发器1530中用于实现发送功能的器件视为发送模块，即收发器1530包括接收器和发送器。收发器有时也可以称为收发机、收发模块、或收发电路等。接收器有时也可以称为接收机、接收模块、或接收电路等。发送器有时也可以称为发射机、发射模块或者发射电路等。
例如，处理器1510用于执行图8所示的实施例中终端设备侧的处理动作，收发器1530用于执行图8中终端设备侧的收发动作。
应理解，图15仅为示例而非限定，上述包括收发模块和处理模块的终端设备可以不依赖于图12所示的结构。
当该通信装置1500为芯片时，该芯片包括处理器和收发器。其中，收发器可以是输入输出电路或通信接口；处理器可以为该芯片上集成的处理模块或者微处理器或者集成电路。上述方法实施例中终端设备的发送操作可以理解为芯片的输出，上述方法实施例中终端设备的接收操作可以理解为芯片的输入。
图16为本申请实施例通信装置的第五种结构示意图。请参阅图16，该通信装置1600可以是网络设备也可以是芯片。该通信装置1600可以用于执行上述方法实施例中由网络设备所执行的操作。
当该通信装置1600为网络设备时，例如为基站。图16示出了一种简化的基站结构示意图。基站包括1610部分、1620部分以及1630部分。1610部分主要用于基带处理，对基站进行控制等；1610部分通常是基站的控制中心，通常可以称为处理器，用于控制基站执行上述方法实施例中网络设备侧的处理操作。1620部分主要用于存储计算机程序代码和数据。1630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；1630部分通常可以称为收发模块、收发机、收发电路、或者收发器等。1630部分的收发模块，也可以称为收发机或收发器等，其包括天线1633和射频电路(图中未示出)，其中射频电路主要用于进行射频处理。可选地，可以将1630部分中用于实现接收功能的器件视为接收机，将用于实现发送功能的器件视为发射机，即1630部分包括接收机1632和发射机1631。接收机也可以称为接收模块、接收器、或接收电路等，发送机可以称为发射模块、发射器或者发射电路等。
1610部分与1620部分可以包括一个或多个单板，每个单板可以包括一个或多个处理器和一个或多个存储器。处理器用于读取和执行存储器中的程序以实现基带处理功能以及对基站的控制。若存在多个单板，各个单板之间可以互联以增强处理能力。作为一种可选的实施方式，也可以是多个单板共用一个或多个处理器，或者是多个单板共用一个或多个存储器，或者是多个单板同时共用一个或多个处理器。
在一种实现方式中，1630部分的收发模块用于执行上述图8所示的实施例中由网络设备执行的收发 相关的过程。1610部分的处理器用于执行上述图8所示的实施例中由网络设备执行的处理相关的过程。
应理解，图16仅为示例而非限定，上述包括处理器、存储器以及收发器的网络设备可以不依赖于图13所示的结构。
当该通信装置1600为芯片时，该芯片包括收发器和处理器。其中，收发器可以是输入输出电路、通信接口；处理器为该芯片上集成的处理器、或者微处理器、或者集成电路。上述方法实施例中网络设备的发送操作可以理解为芯片的输出，上述方法实施例中网络设备的接收操作可以理解为芯片的输入。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由终端设备或网络设备执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法实施例中由终端设备或网络设备执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被计算机执行时使得该计算机实现上述方法实施例中由终端设备或网络设备执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文实施例中的终端设备和网络设备。终端设备用于执行图8所示的实施例中的全部或部分步骤。网络设备用于执行图8所示的实施例中的全部或部分步骤。
本申请实施例还提供一种芯片装置，包括处理器，用于调用该存储器中存储的计算机程度或计算机指令，以使得该处理器执行上述图8所示的实施例的方法。
一种可能的实现方式中，该芯片装置的输入对应上述图8所示的实施例中的接收操作，该芯片装置的输出对应上述图8所示的实施例中的发送操作。
可选的，该处理器通过接口与存储器耦合。
可选的，该芯片装置还包括存储器，该存储器中存储有计算机程度或计算机指令。
其中，上述任一处提到的处理器，可以是一个通用中央处理器，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制上述图8所示的实施例的方法的程序执行的集成电路。上述任一处提到的存储器可以为只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)等。
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。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元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做出贡献的部分或者该技术方案的全部或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、ROM、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，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申 请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (20)

  1. 一种信道状态信息发送方法，其特征在于，所述方法包括：
    终端设备接收来自网络设备的参考信号，所述参考信号对应多个参考信号端口；
    所述终端设备根据所述多个参考信号端口确定N个第一端口组，所述多个参考信号端口包括所述N个第一端口组的所有参考信号端口，所述N个第一端口组中不同第一端口组包括的参考信号端口不同，所述N为大于或等于1的整数；
    所述终端设备根据第一权值和所述N个第一端口组的信道信息确定N个等效端口在所述第一权值下的信道状态信息，所述N个第一端口组与所述N个等效端口一一对应；
    所述终端设备向所述网络设备发送第一信道状态信息，所述第一信道状态信息是根据所述N个等效端口在所述第一权值下的信道状态信息确定的。
  2. 一种信道状态信息接收方法，其特征在于，所述方法包括：
    网络设备向终端设备发送参考信号，所述参考信号对应多个参考信号端口；
    所述网络设备接收来自所述终端设备的第一信道状态信息；
    其中，所述第一信道状态信息是根据N个等效端口在第一权值下的信道状态信息确定的，所述N个等效端口在所述第一权值下的信道状态信息是根据所述第一权值和N个第一端口组的信道信息确定的，所述N个第一端口组与所述N个等效端口一一对应，所述多个参考信号端口包括所述N个第一端口组的所有参考信号端口，所述N个第一端口组中不同第一端口组包括的参考信号端口不同，所述N为大于或等于1的整数。
  3. 根据权利要求1或2所述的方法，其特征在于，所述N个等效端口在所述第一权值下的信道状态信息包括第一预编码矩阵指示PMI，所述第一PMI用于指示所述N个等效端口在所述第一权值下的预编码矩阵；
    所述第一信道状态信息包括第一基底的索引和第一系数，所述第一系数是根据所述N个等效端口在所述第一权值下的预编码矩阵和所述第一基底确定的，所述第一基底为空域基底、频域基底、或者空频联合基底。
  4. 根据权利要求1或2所述的方法，其特征在于，所述第一信道状态信息包括频域基底的索引和所述N个等效端口中的M个等效端口在所述第一权值下的预编码权值对应的第二系数，所述第二系数是根据所述M个等效端口在所述第一权值下的预编码权值和所述频域基底确定的，所述M大于或等于1且小于所述N。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述第一信道状态信息还包括以下至少一项：第一信道质量指示CQI、第一秩指示RI；
    其中，所述第一CQI用于指示所述N个等效端口在所述第一权值下对应的信道质量，所述第一RI用于指示所述N个等效端口在所述第一权值下对应的信道的秩。
  6. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述终端设备根据R个第二权值和所述N个第一端口组的信道信息确定所述N个等效端口在所述R个第二权值中各个第二权值下的信道状态信息，所述R为大于或等于1的整数；
    所述第一信道状态信息是根据所述N个等效端口在所述第一权值下的信道状态信息和所述N个等效端口在所述R个第二权值中的X个第二权值中各个第二权值下的信道状态信息确定的，所述X为大于或等于1且小于或等于所述R的整数。
  7. 根据权利要求6所述的方法，其特征在于，所述N个等效端口在所述第一权值下的信道状态信息包括第一预编码矩阵指示PMI，所述第一PMI用于指示所述N个等效端口在所述第一权值下的预编码矩阵；
    所述N个等效端口在所述R个第二权值中各个第二权值下的信道状态信息包括R个第二PMI，所述R个第二PMI与所述R个第二权值一一对应，所述R个第二PMI中一个第二PMI用于指示所述N个等效端口在所述第二PMI对应的第二权值下的预编码矩阵；
    所述第一信道状态信息包括第三系数、X个第四系数以及第二基底的索引；其中，所述第三系数是 根据所述N个等效端口在所述第一权值下的预编码矩阵和所述第二基底确定的，所述X个第四系数与所述R个第二PMI中的X个第二PMI一一对应，所述X个第四系数中的一个第四系数是根据所述第四系数对应的第二PMI所指示的预编码矩阵和所述第二基底投影确定的，所述第二基底为空域基底、频域基底或空频联合基底。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，在所述终端设备根据所述多个参考信号端口的信道信息确定N个第一端口组的信道信息之前，所述方法还包括：
    所述终端设备接收来自所述网络设备的第一配置信息；或者，
    所述网络设备向所述终端设备发送第一配置信息；
    其中，所述第一配置信息用于指示P个第二端口组，所述N个第一端口组是根据所述P个第二端口组确定的。
  9. 根据权利要求8所述的方法，其特征在于，所述终端设备确定N个第一端口组，包括：
    所述终端设备根据所述第一配置信息确定所述P个第二端口组；
    所述终端设备根据所述预设规则和所述P个第二端口组确定所述N个第一端口组。
  10. 根据权利要求8或9所述的方法，其特征在于，所述第一配置信息包括所述多个参考信号端口的数量和所述多个参考信号端口采用的码分复用类型；所述P的取值为以下任一项：
    所述多个参考信号端口的数量与所述码分复用类型所指示的采用时域码分的参考信号端口的数量的比值；或者，
    所述码分复用类型所指示的采用时域码分的参考信号端口的数量；或者，
    所述多个参考信号端口的数量与码分复用组的数量的比值，所述码分复用组的数量等于所述多个参考信号端口的数量与所述码分复用类型所指示的每个码分复用组包括的参考信号端口数的比值；或者，
    所述码分复用组数量与所述码分复用类型所指示的采用时域码分的参考信号端口的数量的积；或者，
    所述码分复用组数量。
  11. 根据权利要求10所述的方法，其特征在于，所述P个第二端口组中的参考信号端口是基于所述P个第二端口组的数量按照参考信号端口的端口号从小到大将所述多个参考信号端口均分得到的。
  12. 根据权利要求1至11中任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第二配置信息；或者，
    所述网络设备向所述终端设备发送第二配置信息；其中，所述第二配置信息用于配置所述第一权值。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述第一权值为所述终端设备确定的，所述第一权值是所述终端设备从码本集合中选择的第一码本。
  14. 根据权利要求13所述的方法，其特征在于；所述方法还包括：
    所述终端设备向所述网络设备发送指示信息；或者，
    所述网络设备接收来自所述终端设备的指示信息；
    其中，所述指示信息用于指示所述第一码本；或者，所述指示信息用于指示所述第一权值对应的波束指向，所述第一权值对应的波束指向用于所述网络设备确定所述第一码本。
  15. 根据权利要求1至14中任一项所述的方法，其特征在于，所述多个参考信号端口中，第一部分参考端口对应第一极化方向，第二部分参考信号端口对应第二极化方向；
    其中，所述第一部分参考信号端口为所述多个参考信号端口中端口号较小的前一半参考信号端口，第二部分参考信号端口为所述多个参考信号端口中端口号较大的后一半参考信号端口。
  16. 根据权利要求1至15中任一项所述的方法，其特征在于，所述N个等效端口中一个等效端口对应一个数字端口，不同等效端口对应不同的数字端口。
  17. 根据权利要求1至16中任一项所述的方法，其特征在于，所述多个参考信号端口中每个参考信号端口对应一个模拟端口，不同参考信号端口对应不同模拟端口。
  18. 一种通信装置，其特征在于，所述通信装置包括收发模块和处理模块；
    所述收发模块用于执行如权利要求1、3至17中任一项所述的收发操作；所述处理模块用于执行如权利要求1、3至17中所述的处理操作；
    或者，
    所述收发模块用于执行如权利要求2至17中任一项所述的收发操作；所述处理模块用于执行如权利要求2至17中任一项所述的处理操作。
  19. 一种通信装置，其特征在于，所述通信装置包括处理器；所述处理器用于执行存储器中的计算机程序或计算机指令，以执行如权利要求1、3至17中任一项所述的方法；或者，以执行如权利要求2至17中任一项所述的方法。
  20. 一种计算机可读存储介质，其特征在于，其上存储有计算机程序，所述计算机程序被通信装置执行时，使得所述通信装置执行如权利要求1、3至17中任一项所述的方法，或者，使得所述通信装置执行如权利要求2至17中任一项所述的方法。
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