WO2022151458A1 - 信道信息获取方法及相关设备 - Google Patents

信道信息获取方法及相关设备 Download PDF

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Publication number
WO2022151458A1
WO2022151458A1 PCT/CN2021/072359 CN2021072359W WO2022151458A1 WO 2022151458 A1 WO2022151458 A1 WO 2022151458A1 CN 2021072359 W CN2021072359 W CN 2021072359W WO 2022151458 A1 WO2022151458 A1 WO 2022151458A1
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WIPO (PCT)
Prior art keywords
reference signal
information
frequency domain
port
parameter configuration
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PCT/CN2021/072359
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English (en)
French (fr)
Inventor
袁一凌
葛士斌
范利
汪洁
金黄平
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/072359 priority Critical patent/WO2022151458A1/zh
Priority to CN202180090436.2A priority patent/CN116711364A/zh
Priority to EP21918661.6A priority patent/EP4266737A4/en
Priority to BR112023014331A priority patent/BR112023014331A2/pt
Priority to JP2023542968A priority patent/JP2024504953A/ja
Publication of WO2022151458A1 publication Critical patent/WO2022151458A1/zh
Priority to US18/352,896 priority patent/US20230361836A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0469—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • 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
    • H04B7/0636—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
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
    • G01S3/48—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a channel information acquisition method and related equipment.
  • massive multi-input multi-output massive MIMO
  • the network device needs to precode the data before sending the data to the terminal device. How the network device precodes the data mainly depends on the channel state information (channel state information, CSI) of the downlink channel fed back by the terminal device to the network device.
  • channel state information channel state information, CSI
  • the reciprocity of the channel can be used to obtain the CSI of the downlink channel through the uplink channel, and then the codebook can be determined to carry out precoding.
  • the uplink and downlink channels do not have complete reciprocity, but have partial reciprocity, such as network
  • the device can obtain the reciprocity information between the uplink and downlink channels, such as angle, delay, etc., from the uplink channel, and load the reciprocity information into the channel state information-reference signal (CSI-RS), and the terminal
  • CSI-RS channel state information-reference signal
  • the device can feed back the information that the uplink and downlink channels are not reciprocal, such as the complex coefficients C UL and C DL corresponding to each angle delay pair of the uplink and downlink, to the network device; further, the network device can obtain the downlink channel based on the non-reciprocal information. full CSI.
  • the information with reciprocity such as angle, time delay, etc.
  • the current codebook can only correspond to a channel measurement configuration of one loading method, so that the current channel information acquisition method cannot meet the requirements in terms of overhead, performance, and complexity.
  • the present application provides a channel information acquisition method and related equipment, which are conducive to flexible configuration of channel information measurement, so that the corresponding acquisition method meets the requirements in terms of overhead, performance, and complexity.
  • the present application provides a method for acquiring channel information.
  • the method can receive first indication information, where the first indication information is used to indicate one parameter configuration combination among multiple parameter configuration combinations of the reference signal; wherein, Multiple parameter configuration combinations are associated with the same codebook. Therefore, the terminal device can feed back the channel state information according to the indicated parameter configuration combination. It can be seen that the network device can select one of various parameter configuration combinations to indicate to the terminal device, which is conducive to realizing the flexible selection of the channel state information acquisition method, thereby meeting the system requirements in terms of overhead, performance and complexity.
  • the present application further provides a method for acquiring channel information, which corresponds to the method described in the first aspect and is described from the perspective of the network device side.
  • the network device can determine and send first indication information; the first indication information is used to indicate one parameter configuration combination among multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are associated with the same codebook associated with W. It can be seen that the network device can select one of various parameter configuration combinations to indicate to the terminal device, which is conducive to realizing the flexible selection of the channel state information acquisition method, thereby meeting the system requirements in terms of overhead, performance and complexity.
  • the parameter configuration combination indicated by the first indication information is associated with the loading method of the angle delay information.
  • the method of loading the angle delay information refers to a method of loading the angle delay information on the port of the reference signal when the network device sends the reference signal. Based on this implementation manner, the network device can flexibly configure a combination of parameter configurations required for channel information measurement based on characteristics such as overhead, performance, and complexity of different loading methods.
  • the parameter configuration combination indicated by the first indication information is associated with a channel state information (channel state information, CSI) feedback mode. Due to the loading method of the angle delay information on the reference signal port, the CSI feedback mode adopted by the terminal equipment is associated. Therefore, this embodiment is beneficial for the terminal device to adopt the corresponding CSI feedback mode based on the indicated parameter configuration combination.
  • channel state information channel state information, CSI
  • the parameter configuration combination indicated by the first indication information is associated with the angle delay information loading mode, and the parameter configuration combination indicated by the first indication information is also associated with the CSI feedback mode.
  • the network device can flexibly choose the angle delay information loading method; for the terminal device, the corresponding CSI feedback mode to be used can be known in time, which is beneficial to meet the system's requirements for overhead, performance and complexity, etc.
  • the parameter configuration combination indicated by the first indication information includes the number K of frequency domain vectors corresponding to each port of the reference signal, where K ⁇ 1; The angle delay pair information is loaded on the port; when K is greater than 1, the angle information or part of the angle delay pair information is loaded on the port of the reference signal. It can be seen that the network device can use the same codebook to implement various implementations by restricting K, which is conducive to the flexible configuration of channel information measurement to meet the system's requirements for performance, overhead, and complexity.
  • the parameter configuration combination indicated by the first indication information includes among the K frequency domain vectors corresponding to each port of the reference signal, the frequency domain vector that is allowed to be selected by the first device.
  • the codebook W satisfies the following characteristics:
  • W 1 is an angle delay information selection matrix or a port selection matrix with a dimension of OP ⁇ L, and is used to instruct the first device to select L pieces of angle delay information or ports from the OP pieces of angle delay information or ports , O ⁇ 1, P ⁇ 1, 1 ⁇ L ⁇ OP;
  • O represents the number of angle delay pair information or angle information loaded on each port of the reference signal, or the number of resource configurations of the reference signal, or Represents the number of pattern configurations of the reference signal;
  • P represents the number of ports corresponding to a pattern configuration of the reference signal and a resource configuration; is a complex coefficient matrix of dimension L ⁇ M, the including at most K 0 non - zero elements in the M frequency domain vectors selected from the K frequency domain vectors of , 1 ⁇ M ⁇ K ⁇ N f .
  • the parameter configuration combination indicated by the first indication information includes the following one or more parameters of the codebook W: the O, the P, the L, the N f , the M, the K, the Describe K 0 .
  • the values of the above-mentioned parameters of the codebook W may be sent to the terminal device through one or more indication information, such as being indicated by one or more pieces of signaling, or indicated by multiple pieces of signaling hierarchically.
  • W 1 is an identity matrix.
  • the first value and the second value may be notified to the terminal device by means of a protocol agreement or an indication of a network device.
  • the network device can adopt different implementation methods, and enable the terminal device to adopt different CSI feedback methods and other CSI acquisition schemes.
  • K or M in f restricts the configuration of other parameters.
  • network equipment and terminal equipment can also load multiple angle delay pair information on the port of the reference signal, or configure multiple resources or multiple patterns, or configure the reference signal. If the signal density is less than 1, the pilot overhead is reduced.
  • the port of the reference signal is loaded with angular delay pair information, and M and K are both equal to 1. It can be seen that in this embodiment, the value of the parameter O in W 1 can be constrained, so that the network device can adopt different implementation modes for the same codebook, while meeting the performance and pilot overhead requirements of each implementation mode, Through the constraint relationship between parameters, the complexity of the terminal side is reduced.
  • the codebook W satisfies the following characteristics:
  • W 1 is a port selection matrix with a dimension of P ⁇ L, used to indicate the L ports selected by the first device from the P ports, P ⁇ 1, 1 ⁇ L ⁇ P;
  • P represents the A pattern configuration of the reference signal and the number of ports corresponding to a resource configuration;
  • the parameter configuration combination indicated by the first indication information includes the following one or more parameters of the codebook W: the P, the L, the N f , the M, the K, the K 0 . It can be seen that the present application can implement various implementations using the same codebook by restricting K or M in W f . Further, it is beneficial to the flexible configuration of channel information measurement, so as to meet the requirements of the system in terms of performance, overhead, and complexity.
  • W 1 is an identity matrix
  • the network device can adopt different implementation methods, and enable the terminal device to adopt different CSI feedback methods and other CSI acquisition schemes.
  • K or M in f restricts the configuration of other parameters.
  • the density of the reference signal is less than 1.
  • each port of the reference signal corresponds to the same K frequency domain vectors in each resource configuration and each pattern configuration; or, different resource configurations of the reference signal correspond to different K frequency domain vectors or, different pattern configurations of the reference signal correspond to different K frequency domain vectors, or, different ports of the reference signal correspond to different K frequency domain vectors.
  • the parameter configuration combination indicated by the first indication information further includes the length K of the window, or also includes the starting point of the window and the length K or 2K of the window; the window includes the reference The index range of the optional frequency domain vectors of the K frequency domain vectors corresponding to each port of the signal.
  • the present application provides a communication device, the communication device has the function of implementing the method example described in the first aspect or the optional implementation manner of the first aspect, for example, the function of the communication device may have the function of the present application.
  • the functions in the embodiments may also have the functions of independently implementing any one of the embodiments in this application.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the structure of the communication device may include a processing unit and a communication unit, and the processing unit is configured to support the communication device to perform corresponding functions in the above method.
  • the communication unit is used to support communication between the communication device and other devices.
  • the communication device may also include a storage unit for coupling with the processing unit and the sending unit, which stores computer programs and data necessary for the communication device.
  • the communication device includes:
  • a communication unit configured to receive first indication information; the first indication information is used to indicate one parameter configuration combination in multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are associated with the same codebook W;
  • the communication unit is further configured to feed back the channel state information according to the parameter configuration combination indicated by the first indication information.
  • the communication apparatus may further include a processing unit configured to determine the channel state information according to the parameter configuration combination indicated by the first indication information.
  • the processing unit may be a processor
  • the communication unit may be a transceiver unit, a transceiver or a communication interface
  • the storage unit may be a memory.
  • the communication unit may be a transceiver in the communication device, for example, implemented by an antenna, a feeder, a codec, etc. in the communication device, or, if the communication device is a chip set in the terminal device, Then the communication unit may be an input/output interface of the chip, such as an input/output circuit, a pin, and the like.
  • the present application further provides another communication device, the communication device having the function of implementing the method example described in the second aspect above, for example, the function of the communication device may have the functions of some or all of the embodiments in the present application. function, and may also have the function of independently implementing any one of the embodiments in this application.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the structure of the communication device may include a processing unit and a communication unit, and the processing unit is configured to support the communication device to perform corresponding functions in the method described in the second aspect above.
  • the communication unit is used to support communication between the communication device and other devices.
  • the communication device may also include a storage unit for coupling with the processing unit and the sending unit, which stores computer programs and data necessary for the communication device.
  • the communication device includes:
  • a processing unit configured to determine first indication information; the first indication information is used to indicate one parameter configuration combination in multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are associated with the same codebook W;
  • a communication unit configured to send the first indication information.
  • the processing unit may be a processor
  • the communication unit may be a transceiver unit, a transceiver or a communication interface
  • the storage unit may be a memory.
  • the communication unit may be a transceiver in the device, for example, implemented by an antenna, a feeder, a codec, etc. in the device, or, if the communication device is a chip set in a network device, the communication A unit may be an input/output interface of the chip, such as an input/output circuit, a pin, and the like.
  • an embodiment of the present invention provides a computer-readable storage medium for storing a computer program.
  • the computer program runs in a communication device, the communication device executes the channel information acquisition described in the first aspect above. method.
  • an embodiment of the present invention provides a computer-readable storage medium for storing a computer program.
  • the computer program runs in a communication device, the communication device executes the channel information acquisition described in the second aspect above. method.
  • the present application further provides a computer program product including a computer program, which, when running on a communication device, enables the communication device to execute the channel information acquisition method described in the first aspect above.
  • the present application further provides a computer program product including a computer program, which, when running on a communication device, enables the communication device to execute the channel information acquisition method described in the second aspect above.
  • the present application provides a chip system
  • the chip system includes at least one processor and an interface for supporting a terminal device to implement the functions involved in the first aspect, for example, determining or processing data involved in the above method and at least one of information.
  • the chip system further includes a memory for storing necessary computer programs and data of the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system
  • the chip system includes at least one processor and an interface for supporting a network device to implement the functions involved in the second aspect, for example, determining or processing data involved in the above method and at least one of information.
  • the chip system further includes a memory for storing necessary computer programs and data of the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of a communication system
  • FIG. 2 is a schematic diagram of a channel state information acquisition scheme
  • 3 is a schematic diagram of the division of a resource block group
  • FIG. 4 is a schematic diagram of another channel state information acquisition scheme
  • FIG. 5 is a schematic flowchart of a method for acquiring channel information provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication apparatus 600 provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication apparatus 700 provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • FIG. 1 is a schematic diagram of a wireless communication network 100 applicable to embodiments of the present application.
  • the wireless communication network 100 includes base stations 102-106 and terminal devices 108-122, wherein the base stations 102-106 can pass a backhaul link (such as a straight line between the base stations 102-106).
  • the backhaul link may be a wired backhaul link (eg, fiber optic, copper cable), or a wireless backhaul link (eg, microwave).
  • Terminal devices 108-122 may communicate with corresponding base stations 102-106 through wireless links (as shown by the broken lines between base stations 102-106 and terminal devices 108-122).
  • the base stations 102-106 generally serve as access devices to provide wireless access services for the terminal devices 108-122, which generally serve as user equipment.
  • each base station corresponds to a service coverage area (also known as a cell, as shown in each oval area in Figure 1), and terminal equipment entering this area can communicate with the base station through wireless signals to receive the base station.
  • Wireless access service provided.
  • the service coverage areas of the base stations may overlap, and the terminal equipment in the overlapping area can receive wireless signals from multiple base stations, so these base stations can cooperate with each other to provide services for the terminal equipment.
  • multiple base stations may use coordinated multipoint (Coordinated multipoint, CoMP) technology to provide services for terminal devices in the above-mentioned overlapping areas. For example, as shown in FIG.
  • CoMP Coordinatd multipoint
  • the service coverage areas of the base station 102 and the base station 104 overlap, and the terminal device 112 is located in the overlapping area, so the terminal device 112 can receive wireless signals from the base station 102 and the base station 104
  • the base station 102 and the base station 104 may cooperate with each other to provide services for the terminal device 112 .
  • the service coverage areas of the base station 102, the base station 104 and the base station 106 have a common overlapping area, and the terminal device 120 is located in the overlapping area, so the terminal device 120 can receive information from the base station.
  • the wireless signals of 102 , 104 and 106 , the base stations 102 , 104 and 106 can cooperate with each other to provide services for the terminal device 120 .
  • a base station may also be called a Node B (NodeB), an evolved NodeB (eNodeB), an Access Point (Access Point, AP), and the like.
  • NodeB Node B
  • eNodeB evolved NodeB
  • Access Point Access Point
  • AP Access Point
  • base stations can be divided into macro base stations for providing macro cells, micro base stations for providing micro cells, and micro base stations for providing pico cells (Pico cells). cell) and a femto base station for providing femto cells.
  • other names may also be adopted for future base stations.
  • a base station typically includes multiple components, such as, but not limited to, a baseband portion, a radio frequency portion, and an antenna array portion.
  • the baseband section is used to perform various baseband processing operations such as, but not limited to, encoding and decoding, modulation and demodulation, precoding, and time-frequency conversion.
  • the baseband part is usually implemented by, for example, but not limited to, a baseband unit (BaseBand Unit, BBU).
  • BBU BaseBand Unit
  • the RF section is used to perform various RF processing operations such as, but not limited to, IF processing and filtering.
  • the radio frequency part is usually implemented by, for example, but not limited to, a radio frequency unit (Radio Frequency Unit, RFU).
  • RFU Radio Frequency Unit
  • Antenna arrays can be divided into active antenna arrays and passive antenna arrays, which are responsible for transmitting and receiving signals.
  • the product form of base station is very rich.
  • the BBU can be integrated with the RFU within the same device, which is connected to the antenna array through cables such as, but not limited to, feeders.
  • the BBU can also be set apart from the RFU, and the two are connected by optical fibers, and communicate through, for example, but not limited to, the Common Public Radio Interface (Common Public Radio Interface, CPRI) protocol.
  • the RFU is usually called an RRU (Remote Radio Unit), which is connected to the antenna array through a cable.
  • the RRU can also be integrated with the antenna array.
  • the active antenna unit (Active Antenna Unit, AAU) product currently on the market adopts this structure.
  • the BBU can be further broken down into multiple parts.
  • the BBU can be further subdivided into a centralized unit (Centralized Unit, CU) and a distributed unit (Distribute Unit, DU) according to the real-time nature of the processed services.
  • the CU is responsible for processing non-real-time protocols and services
  • the DU is responsible for processing physical layer protocols and real-time services.
  • some physical layer functions can also be separated from the BBU or DU and integrated in the AAU.
  • the base station may include multiple parts, and there are multiple different product forms.
  • the technical solutions described in the embodiments of this application may only involve one or more parts of the base station, or may involve the entire base station. Therefore, the base station in the embodiments of the present application may refer to a base station product that only includes several parts used to implement the technical solutions of the embodiments of the present application, or may refer to the entire base station, where the above-mentioned parts may include, for example, but not limited to, the above One or more of the baseband part, radio frequency part, antenna array, BBU, RRU, RFU, AAU, CU and DU, etc.
  • the technical solutions provided by the embodiments of the present application may only be implemented by corresponding chips in each of the above-mentioned parts.
  • the technical solutions provided by the embodiments of the present application may involve one chip, or may Multiple chips are involved.
  • the technical solutions provided in the embodiments of the present application may be implemented by the entire base station, or by several parts of the base station, and may also be implemented by one or more chips in these parts, that is, It is implemented by one or more chips in the base station.
  • a technical solution may only be implemented by the part involving baseband processing in the base station.
  • the technical solution may be implemented by the BBU, or by the CU, or by the DU, or by the CU and the DU jointly. Implementation, either by the AAU, or by one or more chips in these devices.
  • the terminal devices 108-122 may be various wireless communication devices with wireless communication functions, such as but not limited to mobile cellular phones, cordless phones, personal digital assistants (PDAs), smart phones, notebook computers, tablet computers, wireless Data cards, wireless modems (Modulator demodulator, Modem) or wearable devices such as smart watches.
  • PDAs personal digital assistants
  • V2X Vehicle-to-everything
  • more and more devices that did not have communication functions before, such as but not limited to, household appliances, vehicles, Tool equipment, service equipment and service facilities begin to obtain wireless communication functions by configuring wireless communication units, so that they can access wireless communication networks and accept remote control.
  • Such devices have wireless communication functions because they are equipped with wireless communication units, so they also belong to the category of wireless communication devices.
  • the terminal devices 108-122 may also be referred to as mobile stations, mobile devices, mobile terminals, wireless terminals, handheld devices, clients, and the like.
  • the base stations 102-106 and the terminal devices 108-122 can be configured with multiple antennas to support MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) technology. Further, the base stations 102 to 106 and the terminal devices 108 to 122 can support either a single-user MIMO (Single-User MIMO, SU-MIMO) technology or a multi-user MIMO (Multi-User MIMO, MU-MIMO), wherein MU-MIMO can be implemented based on space division multiple access (Space Division Multiple Access, SDMA) technology.
  • MIMO Multiple Input Multiple Output
  • SU-MIMO single-user MIMO
  • Multi-User MIMO, MU-MIMO multi-user MIMO
  • MU-MIMO can be implemented based on space division multiple access (Space Division Multiple Access, SDMA) technology.
  • the base stations 102 to 106 and the terminal devices 108 to 122 can also flexibly support Single Input Single Output (Single Input Single Output, SISO) technology, Single Input Multiple Output (Single Input Multiple Output, SIMO) and multiple input Single output (Multiple Input Single Output, MISO) technology to achieve various diversity (such as but not limited to transmit diversity and receive diversity) and multiplexing technology, where diversity technology may include, for example, but not limited to Transmit Diversity (TD) technology and receive diversity (Receive Diversity, RD) technology, the multiplexing technology may be a spatial multiplexing (Spatial Multiplexing) technology.
  • the transmit diversity technology may include Transmit Diversity.
  • Transmit Diversity improves transmission reliability by redundantly transmitting the original signal (eg, symbols) in time, frequency, space (eg, antennas), or various combinations of the three dimensions.
  • the quantity of redundant transmission can be set according to the channel model or channel quality.
  • the object of redundant transmission can be the original signal itself, or the signal after processing the original signal.
  • processing can include: For example, but not limited to, processing such as delay, negation, conjugation, rotation, etc., as well as processing obtained after the above-mentioned various processing are derived, evolved and combined.
  • transmit diversity includes, for example but not limited to, Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity (SFTD), Time Switched Transmit Diversity (Time Switched Transmit Diversity, Diversity methods such as TSTD), Frequency Switch Transmit Diversity (FSTD), Orthogonal Transmit Diversity (OTD), Cyclic Delay Diversity (CDD), and the above-mentioned diversity methods are derived , evolution, and the diversity obtained after combining.
  • LTE Long Term Evolution
  • STBC Space Time Block Coding
  • SFBC Space Frequency Block Coding
  • CDD Cyclic Delay Diversity
  • transmit diversity also includes other various implementations. Therefore, the above description should not be construed as a limitation on the technical solutions of the present application, and the technical solutions of the present application should be understood as being applicable to various possible transmit diversity solutions.
  • the base stations 102-106 and the terminal devices 108-122 may communicate using various wireless communication technologies.
  • wireless communication technologies include but are not limited to time division multiple access (Time Division Multiple Access, TDMA) technology, frequency division multiple access (Frequency Division Multiple Access, FDMA) technology, code division multiple access (Code Division Multiple Access, CDMA) technology, time division Synchronous Code Division Multiple Access (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA), Orthogonal Frequency Division Multiple Access (Orthogonal FDMA, OFDMA) technology, Single Carrier Frequency Division Multiple Access (Single Carrier FDMA, SC-FDMA) technology , Space Division Multiple Access (Space Division Multiple Access, SDMA) technology and the evolution and derivative technology of these technologies.
  • the above wireless communication technologies are adopted by many wireless communication standards as Radio Access Technology (RAT), thus constructing various wireless communication systems (or networks) that are widely known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by the 802.11 series of standards, Worldwide Interoperability for Microwave Access (WiMAX), Long Term Evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-Advanced, LTE-A), 5G, and evolution systems of these wireless communication systems, etc.
  • GSM Global System for Mobile Communications
  • WCDMA Wideband CDMA
  • WiFi defined by the 802.11 series of standards
  • WiMAX Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced
  • 5G evolution systems
  • the wireless communication network 100 shown in FIG. 1 is only used for example, and is not used to limit the technical solution of the present application. Those skilled in the art should understand that in a specific implementation process, the wireless communication network 100 may also include other devices, and the number of base stations and terminal devices may also be configured according to specific needs.
  • the numbering can start from 1 consecutively.
  • the N f frequency domain units may include the 1 th frequency domain unit to the N f th frequency domain unit, and so on.
  • the specific implementation is not limited to this.
  • it can also be numbered consecutively from 0.
  • the N f frequency domain units may include the 0 th frequency domain unit to the N f ⁇ 1 th frequency domain unit, which are not listed here for brevity.
  • the corresponding index can be numbered from 1 or from 0, for example, the index of the 1st frequency domain unit is 1, and the index of the Nfth frequency domain unit is Nf ; or, the 0th frequency domain unit The index of is 0, and the index of the N f -1 th frequency domain unit is N f -1.
  • the superscript T represents the transpose, such as A T represents the transpose of the matrix (or vector) A.
  • the superscript H represents the conjugate transpose, for example, A H represents the conjugate transpose of the matrix (or vector) A.
  • "for indicating” may include both for direct indication and for indirect indication.
  • the indication information may directly indicate A or indirectly indicate A, but it does not mean that A must be carried in the indication information.
  • the information indicated by the indication information is called the information to be indicated.
  • the information to be indicated can be directly indicated, such as the information to be indicated itself or the information to be indicated. Indicating the index of information, etc.
  • the information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance.
  • the indication of specific information can also be implemented by means of a pre-agreed (for example, a protocol stipulated) arrangement order of various information, so as to reduce the indication overhead to a certain extent.
  • a pre-agreed for example, a protocol stipulated
  • the common part of each piece of information can also be identified and indicated uniformly, so as to reduce the indication overhead caused by indicating the same information separately.
  • a precoding matrix is composed of precoding vectors, and each precoding vector in the precoding matrix may have the same parts in terms of composition or other properties.
  • the specific indication manner may also be various existing indication manners, such as, but not limited to, the above indication manner and various combinations thereof.
  • the required indication mode can be selected according to specific needs.
  • the selected indication mode is not limited in this embodiment of the present application. In this way, the indication mode involved in the embodiment of the present application should be understood as covering the ability to make the indication to be indicated. Various methods for the party to learn the information to be indicated.
  • the information to be indicated may be sent together as a whole, or may be divided into multiple sub-information and sent separately, and the transmission periods and/or transmission timings of these sub-information may be the same or different.
  • the specific sending method is not limited in this application.
  • the sending period and/or sending timing of these sub-information may be predefined, for example, predefined according to a protocol, or configured by the transmitting end device by sending configuration information to the receiving end device.
  • the configuration information may include, for example, but not limited to, one or a combination of at least two of radio resource control signaling, medium access control (medium access control, MAC) layer signaling, and physical layer signaling.
  • the radio resource control signaling such as packet radio resource control (radio resource control, RRC) signaling; MAC layer signaling, for example, includes MAC control element (control element, CE); physical layer signaling, for example, includes downlink control information (downlink control information). information, DCI).
  • RRC radio resource control
  • MAC layer signaling for example, includes MAC control element (control element, CE)
  • CE control element
  • physical layer signaling for example, includes downlink control information (downlink control information). information, DCI).
  • precoding matrix indicator (PMI), channel, resource block (RB), resource block group (RBG), subband, precoding resource
  • PMI precoding matrix indicator
  • RB resource block
  • RBG resource block group
  • RE resource element
  • predefinition or “preconfiguration” can be achieved by pre-saving corresponding codes, forms or other means that can be used to indicate relevant information in the equipment (for example, including terminal equipment and network equipment).
  • the specific implementation manner is not limited.
  • saving may refer to saving in one or more memories.
  • the one or more memories may be provided separately, or may be integrated in an encoder or decoder, a processor, or a communication device.
  • the one or more memories may also be partially provided separately and partially integrated in the decoder, processor, or communication device.
  • the type of memory may be any form of storage medium, which is not limited in this application.
  • the “protocol” involved in the embodiments of this application may refer to standard protocols in the communication field, for example, may include LTE protocols, new radio (NR) protocols, and related protocols applied in future communication systems.
  • LTE protocols LTE protocols
  • NR new radio
  • the application is not limited.
  • At least one means one or more, and “plurality” means two or more.
  • And/or which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b and c can represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a , b and c.
  • a, b and c can be single or multiple respectively.
  • the precoding technology can realize the transmission on the same time-frequency resource between the sending device and multiple receiving devices, that is, realize the multi-user multiple input multiple output (MU-MIMO).
  • MU-MIMO multi-user multiple input multiple output
  • the network device mainly relies on the channel state information (channel state information, CSI) of the downlink channel fed back by the terminal device to the network device to determine.
  • precoding may also be performed in other manners, for example, in the case where channel state information (eg, but not limited to, channel matrix) cannot be obtained, precoding is performed by using a preset precoding matrix or a weighted processing manner. For the sake of brevity, the specific content will not be repeated here.
  • the multipath delay causes frequency selective fading, which is the change of the frequency domain channel.
  • the delay information is the transmission time of the wireless signal on different transmission paths, which is determined by the distance and speed, and has nothing to do with the frequency domain of the wireless signal.
  • signals are transmitted on different transmission paths, there are different transmission delays due to different distances. Since the physical locations between the network equipment and the terminal equipment are fixed, the multipath distribution of the uplink and downlink channels is the same in time delay. Therefore, the uplink and downlink channels of the delay information in the FDD mode can be considered to be the same, or in other words, reciprocal.
  • the angle information can refer to the angle of arrival (AOA) of the signal reaching the receiving antenna via the wireless channel, or it can refer to the angle of departure (AOD) of the signal transmitted through the transmitting antenna.
  • the angle information may refer to the arrival angle of the uplink signal reaching the network device, or may refer to the departure angle of the network device transmitting the downlink signal. Due to the reciprocity of the transmission paths of the uplink and downlink channels on different frequencies, the arrival angle of the uplink reference signal and the departure angle of the downlink reference signal can be considered to be reciprocal.
  • the angle information described in this paper is actually an angle vector with a dimension of N tx *1, denoted as S( ⁇ k ), where N tx is the number of antennas of the network device; correspondingly, the delay information is actually a dimension of N f *
  • the reference signal may also be referred to as a pilot, a reference sequence, or the like.
  • the reference signal may be a reference signal used for channel measurement.
  • the reference signal may be a channel state information reference signal (CSI-RS) used for downlink channel measurement.
  • CSI-RS channel state information reference signal
  • the reference signal used to obtain the channel state information of the downlink channel may also be referred to as a downlink reference signal or CSI-RS.
  • the network device may precode the reference signal and send it to the terminal device.
  • the precoding may specifically include beamforming (beamforming) and phase rotation.
  • the beamforming may be implemented by precoding the reference signal based on one or more angle vectors, for example, and the phase rotation may be implemented by precoding the reference signal based on one or more delay vectors, for example.
  • the network device adopts different ways of precoding processing for the reference signal, and the way that the terminal device feeds back the channel state information is also different.
  • the port of the reference signal refers to the antenna port used for transmitting the reference signal, and the network device can configure the number P of ports of the reference signal.
  • each port of the reference signal may be loaded with angle information and/or delay information, that is, each port may be a port after beamforming and/or phase rotation.
  • the reference signal of each port may be obtained by precoding the reference signal based on an angle vector and/or a delay vector.
  • the reference signal for each port can be transmitted through one or more frequency domain units.
  • the transmission bandwidth of the reference signal is N f frequency domain units.
  • the N f frequency domain units may be continuous or discontinuous frequency domain units.
  • the index of the frequency domain units described in this application is based on the order in which the N f frequency domain units are arranged based on the frequency size, etc., rather than an index in the system bandwidth.
  • the index of the N f frequency domain units in the system bandwidth can also be used for description, but the essence is the same. elaborate.
  • the frequency domain unit may also be referred to as a frequency unit, which represents a unit of frequency domain resources, and can represent different granularity of frequency domain resources.
  • the frequency domain unit may include, for example, but is not limited to, one or more subbands (subband, SB), one or more resource blocks (RB), one or more resource block groups (resource block group, RBG), one or more A precoding resource block group (precoding resource block group, PRG), etc.
  • subband subband
  • RB resource blocks
  • RBG resource block group
  • precoding resource block group precoding resource block group
  • precoding the reference signal based on one or more angle vectors may also be referred to as loading one or more angle vectors onto the reference signal to implement beamforming.
  • Precoding the reference signal based on one or more delay vectors may also be referred to as loading one or more delay vectors onto the reference signal to implement phase rotation.
  • Precoding the reference signal based on one or more angular delay information may also be referred to as loading one or more angular delay information onto the reference signal to implement beamforming and phase rotation.
  • the information with reciprocity between the uplink and downlink channels can be used to precode the reference signal, and the terminal equipment can report that there is no reciprocity between the uplink and downlink channels.
  • the network device constructs a complete CSI based on the information without reciprocity and the information with reciprocity.
  • the information with reciprocity may include spatial domain information and frequency domain information, and the information without reciprocity may include complex coefficients corresponding to each angle delay information.
  • the uplink channel H UL can be expressed as:
  • S is the spatial information matrix with dimension N tx ⁇ N tx , which physically corresponds to the arrival angle/departure angle of network equipment
  • F is the frequency domain information matrix with dimension N f ⁇ N f , which physically corresponds to the arrival angle of network equipment.
  • the time delay of each multipath signal
  • C UL is a complex coefficient matrix with dimension N tx ⁇ N f , which is used to represent the complex coefficients (also called complex coefficients) corresponding to the time delay information of each angle of the uplink channel.
  • vec(C UL ) is a column vector composed of complex coefficients corresponding to the delay information of each angle of the uplink channel; therefore, the network device can obtain each angle time based on formulas (1) and (2).
  • the channel state information CSI acquisition scheme based on the angle delay information may include: the network device may load the spatial domain weight and/or the frequency domain weight corresponding to the angle delay information on the frequency domain unit of each port of the reference signal, A precoded reference signal is obtained and sent. Furthermore, the terminal equipment performs channel estimation according to the reference signal, and obtains the equivalent channel of each frequency domain unit on each port, which is denoted as Among them, p represents the pth port, and n represents the nth frequency domain unit. The terminal equipment accumulates the equivalent channels on the N f frequency domain units of each port, and obtains and reports the complex coefficient of the angle delay information loaded by each port.
  • the network device can construct complete channel state information based on the aforementioned weight vector of the delay information of each angle and the complex coefficient matrix C DL of the downlink channel.
  • the complex coefficient matrix C DL may be based on the complex coefficients of each port Sure.
  • the channel state information CSI acquisition scheme based on the angle delay information is related to the angle delay information loading method on the network device side and the CSI feedback mode on the terminal device side.
  • the channel state information CSI acquisition scheme based on the angle delay information may include but not limited to the following CSI acquisition schemes:
  • the angle delay information loading method 1.1 is: the port of the reference signal is loaded with angle delay pair information, and the angle delay pair information includes an angle information and a delay information; in CSI feedback mode 1.1 , the fake terminal device performs full-band accumulation of the equivalent channels on the N f frequency domain units of each port, and obtains and reports the complex coefficient of an angle delay pair information loaded by each port.
  • the network device estimates the angle information and the delay information according to the uplink channel H UL , and loads the spatial domain weight and frequency domain weight corresponding to the angle information and the delay information respectively on the port of each port of the reference signal. on the frequency domain unit.
  • the terminal device obtains the corresponding complex coefficients according to the reference signal. For example, the complex coefficient of an angle delay information loaded by the pth port
  • the network device can construct complete channel state information based on the reciprocal space-domain vector and frequency-domain vector combined with the complex coefficient matrix C DL of the downlink channel.
  • the complex coefficient matrix C DL may be based on the complex coefficients of each port Sure.
  • the information of multiple angle-delay pairs can be loaded on one port by means of comb division.
  • the network device may load multiple angle-delay pair information by means of resource grouping for the transmission bandwidth of the reference signal.
  • the N f resource units can be divided into two groups according to the index parity.
  • the first group includes indexes 2, 4, and 6.
  • the second group includes 1, 3, ..., N f -1, etc.
  • the weight b1 of the first angle delay pair information is loaded in the first group
  • the weight value b2 of the second angle delay pair information is loaded in the second group.
  • the grouping of frequency domain resources can also be realized by configuring multiple patterns of reference signals (RS patterns) or configuring multiple resources of reference signals. That is, O reference signal patterns correspond to O resource block groups, or, O resource configurations correspond to O resource block groups.
  • the resource configuration of CSI-RS includes two pattern configurations, corresponding to CSI-RS pattern 1 and CSI-RS pattern 2 respectively, CSI-RS ports are divided into two groups, and each CSI-RS pattern corresponds to a group of CSI-RS port.
  • CSI-RS ports in CSI-RS port group 1 are configured by CSI-RS pattern 1
  • CSI-RS ports in CSI-RS port group 2 are configured by CSI-RS pattern 2.
  • the CSI-RS ports are divided into two groups, and each CSI-RS resource corresponds to a group of CSI-RS ports.
  • CSI-RS ports in CSI-RS port group 1 are configured by CSI-RS resource 1
  • CSI-RS ports in CSI-RS port group 2 are configured by CSI-RS resource 2 .
  • Another way to reduce pilot overhead is to configure the density of reference signals to be less than 1.
  • the density is set to 0.25, which means there is one reference signal every 4 RBs. That is, the density ⁇ of the reference signal ( ⁇ 1 and divisible by 1) means that there is one reference signal in every 1/ ⁇ RB.
  • the CSI acquisition solution 1 has the characteristics of high implementation complexity on the network device side and low implementation complexity on the terminal device side.
  • the angle delay information loading method 1.2 is: the angle information is loaded on the port of the reference signal, and the network device will send the delay information obtained based on the uplink channel measurement to the terminal device through signaling; CSI; In the feedback mode 1.2, corresponding to the above angle delay information loading method 1.2 or angle delay information loading method 1.3, the terminal device can calculate the complex coefficient of each port according to the delivered delay information.
  • the network device estimates the angle information and the delay information according to the uplink channel H UL , loads the space domain weight corresponding to the angle information on the frequency domain unit of each port of the reference signal, and at the same time adds the delay information F Delivered to the terminal device, for example, indicating the frequency domain weight corresponding to the delay information.
  • the terminal device obtains the corresponding complex coefficient according to the reference signal and the delay information F indicated by the network device
  • the network device can construct complete channel state information based on the reciprocal space-domain vector and frequency-domain vector combined with the complex coefficient matrix C DL of the downlink channel.
  • the complex coefficient matrix C DL may be based on the complex coefficients of each port Sure.
  • the CSI acquisition scheme 2 has the characteristics of low pilot overhead, low implementation complexity on the network device side, but high implementation complexity on the terminal device side.
  • CSI acquisition scheme 1 is better than CSI acquisition scheme 2.
  • the angle delay information loading method 1.3 the port of the reference signal is loaded with part of the angle delay pair information.
  • the network device groups the obtained angle delay pair information, each angle delay pair information in the same group corresponds to the same angle information, and then the network device loads one angle delay pair information in each group on the reference signal. On the port, and the delay information in the remaining angle delay pair information in each group is delivered to the terminal device.
  • the CSI feedback mode may adopt the manner described in the above-mentioned CSI feedback mode 1.2.
  • This CSI acquisition scheme 3 has less pilot overhead, and the implementation complexity on the network device side is between the above two CSI acquisition schemes.
  • CSI acquisition scheme 3 is not as good as CSI acquisition scheme 1, and is better than CSI acquisition scheme 2. excellent.
  • the present application provides a method for acquiring channel information, in which multiple parameter configuration combinations are associated with the same codebook, which facilitates flexible configuration of channel information measurement, so that the corresponding CSI acquisition scheme satisfies the requirements in terms of overhead, performance, and complexity. need.
  • FIG. 5 is a schematic flowchart of a method for acquiring channel information provided by an embodiment of the present application.
  • the method for acquiring channel information may be applicable to a first device.
  • the first device is a terminal device as example to illustrate.
  • the method shown in FIG. 5 is described from both ends of the network device and the terminal device.
  • the method for acquiring channel information may include, but is not limited to, the following steps:
  • the network device determines first indication information
  • the network device sends the first indication information
  • the first indication information is used to indicate one parameter configuration combination among multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are associated with the same codebook W.
  • the first indication information may indicate an index of a parameter configuration combination, which is not limited in this embodiment of the present application.
  • the terminal device receives the first indication information
  • the terminal device feeds back channel state information according to the parameter configuration combination indicated by the first indication information.
  • the various parameter configuration combinations may correspond to various implementation behaviors on the network device side, such as various angular delay information loading methods of the port of the reference signal.
  • the multiple parameter configuration combinations may correspond to multiple implementation behaviors on the terminal device side, such as multiple channel state information CSI feedback modes, etc. Therefore, multiple parameter configuration combinations are associated with the same codebook, so that these implementations can be implemented using the same codebook.
  • the parameter configuration combination indicated by the first indication information is associated with the loading method of the angle delay information.
  • the method of loading the angle delay information refers to a method of loading the angle delay information on the port of the reference signal when the network device sends the reference signal. Based on this embodiment, the network device can flexibly configure the parameter configuration combination required for channel information measurement based on the overhead of different angles of delay information loading methods, and the requirements for improved system performance and complexity.
  • the network device can configure the combination of the indicated parameters, so that the network device can also use different angle delay information loading methods under the same codebook, which is conducive to the flexible configuration of the channel measurement information and satisfies the system. and complexity requirements.
  • the parameter configuration combination indicated by the first indication information includes the number K of frequency domain vectors corresponding to each port of the reference signal, where K ⁇ 1.
  • the port of the reference signal is loaded with the angle delay pair information, such as the angle delay information loading method 1.1; when the K is greater than 1, the port of the reference signal is loaded with the angle information or part of the information
  • Angle delay pair information such as angle delay information loading method 1.2 or angle delay information loading method 1.3.
  • the terminal device when K is equal to 1, the terminal device does not need to search in the frequency domain for the reference signal, that is, the port of the reference signal sent by the network device side is loaded with all the estimated angle delay pair information, that is The angular delay loading method 1.1 is adopted.
  • K is greater than 1
  • the terminal device needs to search in the frequency domain for the reference signal to obtain each frequency domain component. Complex coefficients on , etc. do not have reciprocal information. That is, the network device will use the angle delay information loading method 1.2 or the angle delay information loading method 1.3 to deliver multiple delay information to the terminal device. That is, the number of frequency domain vectors corresponding to each port corresponds to the amount of delay information to be measured for each port.
  • the network device sends all the delay information to the terminal device without loading it on the reference signal; in the angle delay information loading method 1.3, the network device sends part of the delay information It is sent to the terminal device, and part of the angle-delay pair information is loaded on the reference signal.
  • the number M of frequency domain vectors that the terminal device is allowed to select K ⁇ 1, 1 ⁇ M ⁇ K.
  • M is greater than 1, the port of the reference signal is loaded with angle information or partial angle delay pair information.
  • the parameter configuration combination indicated by the first indication information is associated with the channel state information CSI feedback mode. Due to the loading method of the angle delay information on the reference signal port, the CSI feedback mode adopted by the terminal equipment is associated. Therefore, this embodiment is beneficial for the terminal device to adopt the corresponding CSI feedback mode based on the indicated parameter configuration combination.
  • the parameter configuration combination indicated by the first indication information is associated with the angle delay information loading mode, and the parameter configuration combination indicated by the first indication information is also associated with the CSI feedback mode.
  • the network device can flexibly choose the angle delay information loading method; for the terminal device, the corresponding CSI feedback mode to be used can be known in time, which is beneficial to meet the system's requirements for overhead, performance and complexity, etc.
  • the relevant angle delay information loading method and CSI feedback mode may refer to the above description, and will not be described in detail here.
  • Embodiment 1 multiple parameter configuration combinations are associated with the same codebook W.
  • the codebook W can satisfy the following characteristics:
  • W 1 is an angle delay information selection matrix or port selection matrix with a dimension of OP ⁇ L, which is used to instruct the terminal device to select L angle delay information or ports from the OP angle delay information or ports, O ⁇ 1, P ⁇ 1, 1 ⁇ L ⁇ OP;
  • O represents the number of angle delay pair information or angle information loaded on each port of the reference signal, or the number of resource configurations of the reference signal, or the reference signal The number of pattern configurations;
  • P represents a pattern configuration of the reference signal and the number of ports corresponding to a resource configuration, or indicates the number of ports of the reference signal (for example, when the reference signal is configured with a resource configuration and a pattern configuration);
  • L/2 angle delay information or ports is a complex coefficient matrix of dimension L ⁇ M, contains at most K 0 non-zero elements, 1 ⁇ K 0 ⁇ L ⁇ M;
  • W f is a frequency domain selection matrix with dimension N f ⁇ M, used to indicate the M frequency domain vectors selected by the terminal device from the K frequency domain vectors corresponding to each port, 1 ⁇ M ⁇ K ⁇ N f ;
  • the parameter configuration combination indicated by the first indication information includes the following one or more parameters of the codebook W: the O, the P, the L, the N f , the M, the K, the the K 0 .
  • the values of the above-mentioned parameters of the codebook W may be sent to the terminal device through one or more indication information, such as being indicated by one or more pieces of signaling, or indicated by multiple pieces of signaling hierarchically.
  • P and L can be used as type 1 parameters
  • O can be used as type 2 parameters
  • K can be used as type 3 parameters
  • K 0 can be used as type 4 parameters
  • a single signaling can simultaneously indicate one of type 1 parameters parameter and one parameter in class 3
  • a single signaling may simultaneously indicate one parameter in class 1, one parameter in class 2, and one parameter in class 3
  • a single signaling may simultaneously indicate one parameter in class 1
  • One parameter, one parameter in class 3, and one parameter in class 4 or a single signaling can indicate one parameter in class 1, one parameter in class 2, one parameter in class 3, and one parameter in class 4 at the same time parameter.
  • K when the network device loads the angle delay pair information on the reference signal port, K can be set to be equal to 1; the network device loads the angle information or part of the angle delay pair information on the reference signal port When , K can be set to be greater than 1, and the network device can use the same codebook shown in formula (5) to construct the channel state information regardless of the implementation mode. Therefore, the network device can make various implementations use the same codebook to execute by constraining K or M in W f . Further, it is beneficial to the flexible configuration of channel information measurement, so as to meet the requirements of the system in terms of performance, overhead, and complexity.
  • the implementation manner described in the angle delay information loading method 1.2 or the angle delay information loading method 1.3 can be adopted.
  • the implementations described in CSI feedback mode 1.2 or CSI feedback mode 1.3 can be used.
  • the channel can be constructed based on the same codebook shown in formula (5). status information.
  • the network device may configure some parameters so that in the codebook shown in formula (5), W 1 is simplified to an identity matrix. For example, when O ⁇ P is less than the first value, or P is less than the second value, or O is equal to 1, W 1 is the identity matrix.
  • the first value and the second value may be notified to the terminal device by means of a protocol agreement or an indication of a network device.
  • the network device configures the value of K or M of W f in the same codebook to adopt different implementation modes, and enables the terminal device to adopt different CSI feedback modes and other CSI acquisition schemes. Configure K or M in W f to limit the configuration of other parameters.
  • network equipment and terminal equipment can also load multiple angular delay pair information on the reference signal port, or configure multiple resources or multiple patterns. mode, or configure the density of reference signals to be less than 1 to reduce pilot overhead.
  • the network device can use the angle delay information loading method 1.1, and each port loads 4 angle delay pair information or configures 4 resources or 4 patterns to reduce pilot overhead.
  • the network device and the terminal device can also reduce the pilot overhead by reducing the density of reference signals.
  • O is equal to 1 when K is greater than 1 or M is greater than 1. That is, the network device and the terminal device can use corresponding implementation methods, such as loading angle information or partial angle delay pair information, to reduce the required pilot overhead, so O is equal to 1.
  • the embodiments of the present application can reduce the pilot frequency through the constraint relationship between parameters while meeting the performance and complexity requirements of various implementations.
  • the port of the reference signal when O is greater than 1, the port of the reference signal is loaded with angular delay pair information, and M and K are both equal to 1. It can be seen that in this embodiment, the overhead is reduced by loading multiple angular delay pair information on each port of the reference signal, so only one frequency domain vector needs to be configured in W f , which avoids the need for the terminal device to search for multiple frequencies. The problem of high complexity caused by the domain vector.
  • the value of the parameter O in W 1 can be constrained, so that the network device can adopt different implementation modes for the same codebook, while meeting the performance and pilot overhead requirements of each implementation mode, Through the constraint relationship between parameters, the complexity of the terminal side is reduced.
  • each port of the reference signal corresponds to the same K frequency domain vectors in each resource configuration and each pattern configuration.
  • each port of the reference signal may correspond to different K frequency domain vectors in each resource configuration and each pattern configuration, wherein the K corresponding to different ports in each resource configuration and each pattern configuration Each frequency domain vector needs to be configured separately.
  • different resource configurations of the reference signal may correspond to K frequency domain vectors that may be different, and optionally, the K frequency domain vectors corresponding to each port corresponding to the same resource configuration may be the same or different.
  • different pattern configurations of the reference signal may correspond to different K frequency domain vectors.
  • the K frequency domain vectors corresponding to each port corresponding to the same pattern configuration may be the same or different.
  • different ports of the reference signal correspond to different K frequency domain vectors.
  • the parameter configuration combination indicated by the first indication information further includes the length K of the window, or also includes the starting point of the window and the length K or length 2K of the window; wherein, the window is one including the reference signal.
  • the indices of the K frequency domain vectors may be consecutive. Then, the starting indexes of the K frequency domain vectors, such as the starting point of the window, may be default, or included in the parameter configuration combination indicated by the first indication information, or indicated by other signaling.
  • the indices of the K frequency domain vectors may be discontinuous.
  • the network device may indicate the K frequency domain vectors by means of a window including the K frequency domain vectors.
  • the network device may also indicate the indices of the K frequency domain vectors through other signaling.
  • Embodiment 2 multiple parameter configuration combinations are associated with the same codebook W, and this codebook W satisfies the following characteristics:
  • the W 1 is a port selection matrix with a dimension of P ⁇ L, used to indicate the L ports selected by the first device from the P ports, P ⁇ 1, 1 ⁇ L ⁇ P;
  • the P represents a pattern configuration of the reference signal and the number of ports corresponding to a resource configuration or the number of ports representing the reference signal (for example, when the reference signal is configured with a resource configuration and a pattern configuration for channel measurement);
  • W 1 for L ports, the same L/2 ports can be selected in each polarization direction, or different L/2 ports can be selected in each polarization direction;
  • said is a complex coefficient matrix of dimension L ⁇ M, the contains at most K 0 non-zero elements, 1 ⁇ K 0 ⁇ L ⁇ M;
  • the W f is a frequency domain selection matrix with dimension N f ⁇ M, used to instruct the first device to select M frequency domain vectors from the K frequency domain vectors corresponding to each port, 1 ⁇ M ⁇ K ⁇ N f ;
  • the parameter configuration combination indicated by the first indication information includes the following one or more parameters of the codebook W:
  • the values of the above-mentioned parameters of the codebook W may be sent to the terminal device through one or more indication information, such as being indicated by one or more pieces of signaling, or indicated by multiple pieces of signaling hierarchically.
  • P and L can be used as type 1 parameters
  • N f , M, K can be used as type 2 parameters
  • K 0 can be used as type 3 parameters
  • a single signaling can indicate one parameter in type 1 and one parameter in type 2 at the same time
  • a single signaling may indicate one parameter in class 1 and one parameter in class 3 simultaneously
  • a single signaling may indicate one parameter in class 1, one parameter in class 3, and one parameter in class 4 at the same time a parameter.
  • K when the network device loads the angle delay pair information on the reference signal port, K can be set to be equal to 1; the network device loads the angle information or part of the angle delay pair information on the reference signal port When , K can be set to be greater than 1, and the network device can use the same codebook shown in formula (6) to construct the channel state information regardless of the implementation mode. Therefore, the network device can make various implementations use the same codebook to execute by constraining K or M in W f . Further, it is beneficial to the flexible configuration of channel information measurement, so as to meet the requirements of the system in terms of performance, overhead, and complexity.
  • K is greater than 1 or M is greater than 1
  • the implementation manner described in the angle delay information loading method 1.2 or the angle delay information loading method 1.3 can be adopted.
  • the implementations described in CSI feedback mode 1.2 or CSI feedback mode 1.3 can be used.
  • a channel can be constructed based on the same codebook shown in formula (6). status information.
  • the network device may configure some parameters so that in the codebook shown in formula (6), W 1 is simplified to an identity matrix. For example, when P is less than the third value, W 1 is the identity matrix.
  • the third value may be notified to the terminal device through a protocol agreement or a manner indicated by the network device.
  • the network device configures the value of K or M of W f in the same codebook to adopt different implementation modes, and enables the terminal device to adopt different CSI feedback modes and other CSI acquisition schemes. Configure K or M in W f to limit the configuration of other parameters.
  • the network device and the terminal device can adopt the above-mentioned corresponding implementation manner, and can also reduce the pilot frequency by reducing the density of the reference signal.
  • the network device can adopt the implementation mode described in the above-mentioned angle delay information loading mode 1.1, and the terminal device can adopt the implementation mode described in the above-mentioned CSI feedback mode 1.1; further, the network device can also
  • the density of reference signals is configured to be 0.25, thereby reducing pilot overhead.
  • the network device can adopt the implementation method described in the above-mentioned angular delay information loading mode 1.1, and the terminal device can adopt the implementation method described in the above-mentioned CSI feedback mode 1.1; further, the network device can also configure the reference signal The density is 0.25 to reduce pilot overhead.
  • this embodiment can reduce the pilot overhead through the constraint relationship between parameters while meeting the performance and complexity requirements of each implementation.
  • the P ports of the reference signal may correspond to the same K frequency domain vectors, or the P ports of the reference signal may correspond to different K frequency domain vectors.
  • the parameter configuration combination indicated by the first indication information further includes the length K of the window, or also includes the starting point of the window and the length K or length 2K of the window; wherein, the window is one including the reference signal.
  • the indices of the K frequency domain vectors may be consecutive. Then, the starting indexes of the K frequency domain vectors, such as the starting point of the window, may be default, or included in the parameter configuration combination indicated by the first indication information, or indicated by other signaling.
  • the indices of the K frequency domain vectors may be discontinuous.
  • the network device may indicate the K frequency domain vectors by means of a window including the K frequency domain vectors.
  • the network device may also indicate the indices of the K frequency domain vectors through other signaling.
  • terminal equipment and network equipment may include hardware structures and software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules.
  • a certain function among the above functions may be implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • the communication apparatus according to the embodiment of the present application will be described in detail below with reference to FIG. 6 to FIG. 8 .
  • the communication device is a terminal device or a network device; optionally, the communication device may be a device in a terminal device or a network device.
  • FIG. 6 shows a schematic block diagram of a communication apparatus 600.
  • the communication apparatus 600 may perform the relevant operations of the network device in the foregoing method embodiments.
  • the communication apparatus 600 includes but is not limited to:
  • the processing unit 601 is configured to determine first indication information; wherein, the first indication information is used to indicate one of the multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are the same as the same codebook W. Associated;
  • the communication unit 602 is configured to send the first indication information.
  • the communication apparatus 600 may perform the relevant operations of the terminal device in the foregoing method embodiments, and the communication apparatus 900 includes but is not limited to:
  • a communication unit 602 configured to receive first indication information
  • the communication unit 602 is further configured to feed back the channel state information according to the parameter configuration combination indicated by the first indication information.
  • the first indication information is used to indicate one parameter configuration combination among multiple parameter configuration combinations of the reference signal; the multiple parameter configuration combinations are associated with the same codebook W.
  • the communication apparatus 600 may also perform optional implementation manners of the above-mentioned method for acquiring channel information, which will not be described in detail here.
  • FIG. 7 shows a schematic block diagram of a communication device 700 .
  • the communication apparatus 700 corresponds to the terminal device in the above method for acquiring channel information.
  • the communication apparatus 700 is an apparatus in a terminal device that executes the foregoing method embodiments, such as a chip, a chip system, or a processor.
  • the communication apparatus 700 may be used to implement the methods described in the foregoing method embodiments, and for details, reference may be made to the descriptions in the foregoing method embodiments.
  • the communication apparatus 700 corresponds to the network device in the above method for acquiring channel information.
  • the communication apparatus 700 is an apparatus in a network device that executes the foregoing method embodiments, such as a chip, a chip system, or a processor.
  • the communication apparatus 700 may be used to implement the methods described in the foregoing method embodiments, and for details, reference may be made to the descriptions in the foregoing method embodiments.
  • the Communication apparatus 700 may include one or more processors 701 .
  • the processor 701 may be a general-purpose processor or a special-purpose processor, or the like.
  • it may be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute computer programs, process computer program data.
  • the communication device 700 may also include a transceiver 705 .
  • the transceiver 705 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function.
  • the transceiver 705 may include a receiver and a transmitter, the receiver may be called a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be called a transmitter or a transmitting circuit, etc., for implementing a transmitting function.
  • the communication device 700 may further include an antenna 706 .
  • the communication device 700 may include one or more memories 702 on which instructions 704 may be stored, and the instructions 704 may be computer programs that can be executed on the communication device 700 so that the communication device 1000 Execute the methods described in the above method embodiments.
  • the memory 702 may also store data.
  • the communication device 700 and the memory 702 may be provided separately or integrated together.
  • the processor 701 is configured to execute step S101 in FIG. 5 .
  • the transceiver 705 is used to perform step S102 in FIG. 5 .
  • the transceiver 705 is used to perform steps S103 and S104 in FIG. 5 .
  • the processor 701 may include a transceiver for implementing receiving and transmitting functions.
  • the transceiver may be a transceiver circuit, or an interface, or an interface circuit.
  • Transceiver circuits, interfaces or interface circuits used to implement receiving and transmitting functions may be separate or integrated.
  • the above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transmission.
  • the processor 701 may store instructions 703, which may be a computer program, and the computer program 703 runs on the processor 701 to enable the communication device 700 to execute the methods described in the above method embodiments.
  • the computer program 703 may be embodied in the processor 701, in which case the processor 701 may be implemented by hardware.
  • the communication apparatus 700 may include a circuit, and the circuit may implement the functions of sending or receiving or communicating in the foregoing method embodiments.
  • the processors and transceivers described in this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (application specific integrated circuits, ASIC), printed circuit board (PCB), electronic equipment, etc.
  • the processor and transceiver can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the communication device described in the above embodiment may be an AP MLD or an AP of the AP MLD, but the scope of the communication device described in this application is not limited to this, and the structure of the communication device may not be limited by FIG. 7 .
  • the communication apparatus may be a stand-alone device or may be part of a larger device.
  • the communication means may be:
  • the IC set can also include a storage component for storing data and computer programs;
  • ASIC such as modem (Modem);
  • the communication device may be a chip or a chip system
  • the chip shown in FIG. 8 includes a processor 801 and an interface 802 .
  • the number of processors 801 may be one or more, and the number of interfaces 802 may be multiple.
  • the processor 801 is configured to execute step S101 in FIG. 5 .
  • the interface 802 is used to execute step S102 in FIG. 5 .
  • the chip may also perform the functions of the terminal device in the above method embodiments:
  • the interface 802 is used to execute steps S103 and S104 in FIG. 5 .
  • the chip may also execute the relevant implementation manners in the foregoing method embodiments, which will not be described in detail here.
  • the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer-readable storage medium is executed by a computer, implements the functions of any of the foregoing method embodiments.
  • the present application also provides a computer program product, which implements the functions of any of the above method embodiments when the computer program product is executed by a computer.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer program may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.
  • the corresponding relationships shown in each table in this application may be configured or predefined.
  • the values of the information in each table are only examples, and can be configured with other values, which are not limited in this application.
  • the corresponding relationships shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, for example, splitting, merging, and so on.
  • the names of the parameters shown in the headings in the above tables may also adopt other names that can be understood by the communication device, and the values or representations of the parameters may also be other values or representations that the communication device can understand.
  • other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables. Wait.
  • Predefined in this application may be understood as defining, predefining, storing, pre-storing, pre-negotiating, pre-configuring, curing, or pre-firing.

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Abstract

本申请提供一种信道信息获取方法及相关设备，其中，该方法可以接收第一指示信息，该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；其中，多种参数配置组合与同一码本相关联。终端设备可根据该指示的参数配置组合，反馈信道状态信息。可见，网络设备可从多种参数配置组合中选择其中一种指示给终端设备，从而有利于实现信道信息获取方案的灵活选择，从而满足系统对开销、新能以及复杂度等方面的需求。

Description

信道信息获取方法及相关设备 技术领域
本申请涉及通信技术领域，尤其涉及一种信道信息获取方法及相关设备。
背景技术
为了提高系统的频谱效率，大规模多输入多输出(massive multi-input multi-output,massive MIMO)技术得到了广泛的应用。采用大规模MIMO技术时，网络设备向终端设备发送数据前，需要对数据进行预编码。而网络设备如何对数据进行预编码主要依靠终端设备向网络设备反馈的下行信道的信道状态信息(channel state information,CSI)确定的。
对于时分复用(time division duplexing，TDD)系统，由于上行信道与下行信道采用相同的频段，因此，可利用信道的互易性，通过上行信道来获取下行信道的CSI，进而确定码本以进行预编码。而对于频分复用(frequency division duplexing，FDD)系统来说，由于上下行频带间的间隔大于带宽，故上下行信道之间不具有完整的互易性，而具有部分互易性，如网络设备可由上行信道获得上下行信道之间的互易信息，如角度、时延等，并将该互易信息加载在信道状态信息-参考信号(channel state information-reference signal，CSI-RS)，终端设备可将上下行信道间不互易的信息，如上下行各角度时延对所对应的复系数C UL、C DL反馈给网络设备；进而，网络设备可基于该不互易信息获得下行信道的完整CSI。
其中，具有互易性的信息，如角度、时延等，在参考信号的端口上的加载方式不同，会使得通信系统具有不同的开销、性能以及复杂度。然而，目前的码本仅能对应一种加载方式的信道测量配置，从而导致目前的信道信息获取方法无法满足开销、性能以及复杂度等方面的需求。
发明内容
本申请提供一种信道信息获取方法及相关设备，有利于信道信息测量的灵活配置，使得对应的获取方法满足开销、性能以及复杂度等方面的需求。
第一方面，本申请提供一种信道信息获取方法，该方法可以接收第一指示信息，该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；其中，多种参数配置组合与同一码本相关联。从而，终端设备可根据该指示的参数配置组合，反馈信道状态信息。可见，网络设备可从多种参数配置组合中选择其中一种指示给终端设备，从而有利于实现信道状态信息获取方式的灵活选择，从而满足系统对开销、性能以及复杂度等方面的需求。
第二方面，本申请还提供一种信道信息获取方法，该方法是与第一方面所述的方法相对应，从网络设备侧的角度进行阐述。该方法中，网络设备可确定并发送第一指示信息；该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；该多种参数配置组合与同一码本W相关联。可见，网络设备可从多种参数配置组合中选择其中一种指示给终端设备，从而有利于实现信道状态信息获取方式的灵活选择，从而满足系统对开销、性能以及复杂度等方面的需求。
以下对适用于第一方面、第二方面的可选的实施方式进行阐述。
一种可选的实施方式中，第一指示信息所指示的参数配置组合与角度时延信息加载方式相关联。其中，角度时延信息加载方式是指网络设备发送参考信号时，在参考信号的端口上加载角度时延信息的方式。基于该实施方式，网络设备可基于不同加载方式的开销，性能以及复杂度等特点，灵活配置信道信息测量所需的参数配置组合。
另一种可选的实施方式中，第一指示信息所指示的参数配置组合与信道状态信息(channel state information，CSI)反馈模式相关联。由于角度时延信息在参考信号的端口上的加载方式，关联终端设备所采用的CSI反馈模式。因此，该实施方式有利于终端设备基于所指示的参数配置组合采用对应的CSI反馈模式。
又一种可选的实施方式中，第一指示信息所指示的参数配置组合与角度时延信息加载方式相关联，第一指示信息所指示的参数配置组合还与CSI反馈模式相关联。这样，对于网络设备侧来说，网络设备可灵活选择角度时延信息加载方式；对于终端设备来说，可及时获知所需采用的对应的CSI反馈模式，从而有利于满足系统对开销、性能以及复杂度等方面的需求。
一种可选的实施方式中，第一指示信息所指示的参数配置组合中，包括参考信号的每个端口对应的频域向量的数目K，K≥1；当K等于1时，参考信号的端口上加载的是角度时延对信息；当K大于1时，参考信号的端口上加载的是角度信息或部分角度时延对信息。可见，网络设备可通过对K的约束，使得各种实现方式采用同一码本即可执行，有利于信道信息测量的灵活配置，以满足系统对性能、开销以及复杂度等方面的需求。
另一种可选的实施方式中，第一指示信息所指示的参数配置组合中，包括参考信号的每个端口对应的K个频域向量中，允许所述第一装置选择的频域向量的数目M，K≥1，1≤M≤K；当M大于1时，参考信号的端口上加载的是角度信息或部分角度时延对信息。可见，网络设备可通过对M的约束，使得各种实现方式采用同一码本即可执行，有利于信道信息测量的灵活配置，以满足系统对性能、开销以及复杂度等方面的需求。
一种可能的实施方式中，该码本W满足如下特征：
Figure PCTCN2021072359-appb-000001
其中，W 1是维度为OP×L的角度时延信息选择矩阵或端口选择矩阵，用于指示所述第一装置从OP个角度时延信息或端口中选择的L个角度时延信息或端口，O≥1，P≥1，1≤L≤OP；O表示参考信号的每个端口上加载的角度时延对信息或角度信息的数目，或表示所述参考信号的资源配置的数目，或表示所述参考信号的图样配置的数目；P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
Figure PCTCN2021072359-appb-000002
是维度为L×M的复系数矩阵，所述
Figure PCTCN2021072359-appb-000003
中至多包括K 0个非零的元素，1≤K 0≤L×M；W f是维度为N f×M的频 域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量，1≤M≤K≤N f。第一指示信息所指示的参数配置组合中，包括码本W的以下一个或多个参数：所述O、所述P、所述L、所述N f、所述M、所述K、所述K 0。
可选的，该码本W的上述参数的取值可通过一个或多个指示信息发送给终端设备，如由一条或多条信令分别指示，或由多条信令分级指示等。
一种可选的实施方式中，该码本中，当O×P小于第一值，或P小于第二值，或O等于1时，W 1是单位矩阵。其中，第一值、第二值可通过协议约定或网络设备指示的方式告知终端设备。
本申请中，网络设备通过配置同一码本中W f的K或M的取值，以采用不同的实现方式，以及使得终端设备采用不同的CSI反馈方式等CSI获取方案外，还可以通过配置W f中K或M，限制其他参数的配置。
一种可选的实施方式中，当K等于1时，O≥2；或者，当K等于1时，O＝1且参考信号的密度小于1。当所述K大于1或所述M大于1时，所述O等于1。可见，K等于1，网络设备和终端设备可采用对应的实现方式外，还可通过在参考信号的端口上加载多个角度时延对信息，或配置多个资源或多个图样，或者配置参考信号的密度小于1等方式降低导频开销。
另一种可选的实施方式中，当O大于1时，参考信号的端口上加载的是角度时延对信息，且M和K均等于1。可见，该实施方式中可以通过对W 1中参数O的取值的约束，以使得网络设备可针对同一码本采用不同的实现方式，满足各实现方式的性能和导频开销的需求的同时，通过参数之间的约束关系，以降低终端侧的复杂度。
另一种可选的实施方式中，码本W满足如下特征：
Figure PCTCN2021072359-appb-000004
其中，W 1是维度为P×L的端口选择矩阵，用于指示所述第一装置从所述P个端口中选择的L个端口，P≥1，1≤L≤P；P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
Figure PCTCN2021072359-appb-000005
是维度为L×M的复系数矩阵，所述
Figure PCTCN2021072359-appb-000006
中至多包括K 0个非零的元素，1≤K 0≤L×M；W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量，1≤M≤K≤N f。第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：所述P、所述L、所述N f、所述M、所述K、所述K 0。可见，本申请可通过对W f中K或M的约束，使得各种实现方式采用同一码 本即可执行。进一步的，有利于信道信息测量的灵活配置，以满足系统对性能、开销以及复杂度等方面的需求。
一种可选的实施方式中，P小于第三值时，W 1是单位矩阵。
本申请中，网络设备通过配置同一码本中W f的K或M的取值，以采用不同的实现方式，以及使得终端设备采用不同的CSI反馈方式等CSI获取方案外，还可以通过配置W f中K或M，限制其他参数的配置。该实施方式中，可选的，K等于1时，参考信号的密度小于1。
本申请中，可选的，参考信号的每个端口在每一个资源配置以及每一个图样配置上对应相同的K个频域向量；或者，所述参考信号的不同资源配置对应不同的K个频域向量；或者，所述参考信号的不同图样配置对应不同的K个频域向量，或者，所述参考信号的不同端口对应不同的K个频域向量。
一种可选的实施方式中，第一指示信息所指示的参数配置组合中，还包括窗口的长度K，或还包括窗口的起点以及窗口的长度K或2K；所述窗口为包括所述参考信号的每个端口对应的所述K个频域向量的可选频域向量的索引范围。
第三方面，本申请提供了一种通信装置，该通信装置具有实现上述第一方面或第一方面的可选的实施方式所述的方法示例的功能，比如通信装置的功能可具备本申请中的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
一种实现方式中，该通信装置的结构中可包括处理单元和通信单元，所述处理单元被配置为支持通信装置执行上述方法中相应的功能。所述通信单元用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储单元，所述存储单元用于与处理单元和发送单元耦合，其保存通信装置必要的计算机程序和数据。
一种实施方式中，所述通信装置包括：
通信单元，用于接收第一指示信息；第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；所述多种参数配置组合与同一码本W相关联；
通信单元，还用于根据第一指示信息所指示的参数配置组合，反馈信道状态信息。
可选的，该通信装置还可包括处理单元，用于根据第一指示信息所指示的参数配置组合，确定信道状态信息。
作为示例，处理单元可以为处理器，通信单元可以为收发单元、收发器或通信接口，存储单元可以为存储器。可以理解的，该通信单元可以是所述通信装置中的收发器，例如通过所述通信装置中的天线、馈线和编解码器等实现，或者，如果通信装置为设置在终端设备中的芯片，则通信单元可以是该芯片的输入/输出接口，例如输入/输出电路、管脚等。
第四方面，本申请还提供了另一种通信装置，该通信装置具有实现上述第二方面所述的方法示例的功能，比如通信装置的功能可具备本申请中的部分或全部实施例中的功能， 也可以具备单独实施本申请中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
一种实施方式中，该通信装置的结构中可包括处理单元和通信单元，所述处理单元被配置为支持通信装置执行上述第二方面所述的方法中相应的功能。所述通信单元用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储单元，所述存储单元用于与处理单元和发送单元耦合，其保存通信装置必要的计算机程序和数据。
一种实施方式中，所述通信装置包括：
处理单元，用于确定第一指示信息；第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；所述多种参数配置组合与同一码本W相关联；
通信单元，用于发送所述第一指示信息。
作为示例，处理单元可以为处理器，通信单元可以为收发单元、收发器或通信接口，存储单元可以为存储器。可以理解的，该通信单元可以是所述装置中的收发器，例如通过所述装置中的天线、馈线和编解码器等实现，或者，如果通信装置为设置在网络设备中的芯片，则通信单元可以是该芯片的输入/输出接口，例如输入/输出电路、管脚等。
第五方面，本发明实施例提供了一种计算机可读存储介质，用于储存计算机程序，所述计算机程序在通信装置中运行时，所述通信装置执行上述第一方面所述的信道信息获取方法。
第六方面，本发明实施例提供了一种计算机可读存储介质，用于储存计算机程序，所述计算机程序在通信装置中运行时，所述通信装置执行上述第二方面所述的信道信息获取方法。
第七方面，本申请还提供了一种包括计算机程序的计算机程序产品，当其在通信装置上运行时，使得通信装置执行上述第一方面所述的信道信息获取方法。
第八方面，本申请还提供了一种包括计算机程序的计算机程序产品，当其在通信装置上运行时，使得通信装置执行上述第二方面所述的信道信息获取方法。
第九方面，本申请提供了一种芯片系统，该芯片系统包括至少一个处理器和接口，用于支持终端设备实现第一方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存终端设备必要的计算机程序和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十方面，本申请提供了一种芯片系统，该芯片系统包括至少一个处理器和接口，用于支持网络设备实现第二方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存网络设备必要的计算机程序和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
附图说明
图1是一种通信系统的示意图；
图2是一种信道状态信息获取方案的示意图；
图3是一种资源块组的划分示意图；
图4是另一种信道状态信息获取方案的示意图；
图5是本申请实施例提供的一种信道信息获取方法的流程示意图；
图6是本申请实施例提供的一种通信装置600的结构示意图；
图7是本申请实施例提供的一种通信装置700的结构示意图；
图8是本申请实施例提供的一种芯片的结构示意图。
具体实施方式
图1是可适用于本申请实施例的无线通信网络100的示意图。如图1所示，无线通信网络100包括基站102～106和终端设备108～122，其中，基站102～106彼此之间可通过回程(backhaul)链路(如基站102～106彼此之间的直线所示)进行通信，该回程链路可以是有线回程链路(例如光纤、铜缆)，也可以是无线回程链路(例如微波)。终端设备108～122可通过无线链路(如基站102～106与终端设备108～122之间的折线所示)与对应的基站102～106通信。
基站102～106通常作为接入设备来为通常作为用户设备的终端设备108～122提供无线接入服务。具体来说，每个基站都对应一个服务覆盖区域(又可称为蜂窝，如图1中各椭圆区域所示)，进入该区域的终端设备可通过无线信号与基站通信，以此来接受基站提供的无线接入服务。基站的服务覆盖区域之间可能存在交叠，处于交叠区域内的终端设备可收到来自多个基站的无线信号，因此这些基站可以进行相互协同，以此来为该终端设备提供服务。例如，多个基站可以采用多点协作(Coordinated multipoint，CoMP)技术为处于上述交叠区域的终端设备提供服务。例如，如图1所示，基站102与基站104的服务覆盖区域存在交叠，终端设备112便处于该交叠区域之内，因此终端设备112可以收到来自基站102和基站104的无线信号，基站102和基站104可以进行相互协同，来为终端设备112提供服务。又例如，如图1所示，基站102、基站104和基站106的服务覆盖区域存在一个共同的交叠区域，终端设备120便处于该交叠区域之内，因此终端设备120可以收到来自基站102、104和106的无线信号，基站102、104和106可以进行相互协同，来为终端设备120提供服务。
依赖于所使用的无线通信技术，基站又可称为节点B(NodeB)，演进节点B(evolved NodeB，eNodeB)以及接入点(Access Point，AP)等。此外，根据所提供的服务覆盖区域的大小，基站又可分为用于提供宏蜂窝(Macro cell)的宏基站、用于提供微蜂窝(Micro cell)的微基站、用于提供微微蜂窝(Pico cell)的微微基站和用于提供毫微微蜂窝(Femto cell)的毫微微基站等。随着无线通信技术的不断演进，未来的基站也可以采用其他的名称。
基站通常包含多个组成部分，例如但不限于，基带部分、射频部分和天线阵列部分。
基带部分用于执行多种基带处理操作，例如但不限于，编解码、调制解调、预编码和 时频转换等。在具体实现过程中，基带部分通常由，例如但不限于，基带单元(BaseBand Unit，BBU)来实现。
射频部分用于执行多种射频处理操作，例如但不限于，中频处理和滤波等。在具体实现过程中，射频部分通常由，例如但不限于，射频单元(Radio Frequency Unit，RFU)来实现。
天线阵列可以分为有源天线阵列和无源天线阵列，负责完成信号的发射和接收。
基站的产品形态十分丰富。例如，在产品实现过程中，BBU可以与RFU集成在同一设备内，该设备通过线缆(例如但不限于馈线)连接至天线阵列。BBU还可以与RFU分离设置，二者之间通过光纤连接，通过例如但不限于，通用公共射频接口(Common Public Radio Interface，CPRI)协议进行通信。在这种情况下，RFU通常称为RRU(Remote Radio Unit，射频拉远单元)，其通过线缆连接至天线阵列。此外，RRU还可以与天线阵列集成在一起，例如，目前市场上的有源天线单元(Active Antenna Unit，AAU)产品就采用了这种结构。
此外，BBU可以进一步分解为多个部分。例如，可以按照所处理业务的实时性将BBU进一步细分为集中单元(Centralized Unit，CU)和分布单元(Distribute Unit，DU)。CU负责处理非实时协议和服务，DU负责处理物理层协议和实时服务。更进一步的，部分物理层功能还可以从BBU或者DU中分离出来，集成在AAU中。
由上文可知，基站可以包含多个部分，且存在多种不同的产品形态。在这种情况下，本申请实施例描述的技术方案，可以仅仅涉及基站的一个或者多个部分，也可以涉及整个基站。因此，本申请实施例中的基站，可以是指仅包含用于实现本申请实施例技术方案的若干部分的基站产品，也可以是指整个基站，其中上述若干部分可以包括例如但不限于上文所述的基带部分、射频部分、天线阵列、BBU、RRU、RFU、AAU、CU和DU等之中的一个或者多个。更进一步的，本申请实施例提供的技术方案可能仅由上述若干部分之中各部分中的相应芯片来实现，在每个部分中，本申请实施例提供的技术方案可以涉及一个芯片，也可以涉及多个芯片。由此可见，本申请实施例提供的技术方案可以由整个基站来实现，也可以由基站中的若干部分来实现，还可以由这些部分之中的一个或者多个芯片来实现，也就是说，由基站中的一个或者多个芯片来实现。举例来说，一个技术方案可能仅由基站中涉及基带处理的部分来实现，更进一步的，该技术方案可由BBU来实现，或者由CU来实现，或者由DU来实现，或者由CU和DU共同实现，或者由AAU来实现，或者由这些设备之中的一个或者多个芯片来实现。
有关基站的功能和产品形态在现有技术中已经进行了清楚的描述，本文不再赘述。
终端设备108～122可以是具备无线通信功能的各种无线通信设备，例如但不限于移动蜂窝电话、无绳电话、个人数字助理(Personal Digital Assistant，PDA)、智能电话、笔记本电脑、平板电脑、无线数据卡、无线调制解调器(Modulator demodulator，Modem)或者可穿戴设备如智能手表等。随着物联网(Internet of Things，IOT)技术和车联网(Vehicle-to-everything，V2X)技术的兴起，越来越多之前不具备通信功能的设备，例如但不限于，家用电器、交通工具、工具设备、服务设备和服务设施，开始通过配置无线通信单元来获得无线通信功能，从而可以接入无线通信网络，接受远程控制。此类设备因配 置有无线通信单元而具备无线通信功能，因此也属于无线通信设备的范畴。此外，终端设备108～122还可以称为移动台、移动设备、移动终端、无线终端、手持设备、客户端等。
基站102～106，和终端设备108～122均可配置有多根天线，以支持MIMO(多入多出，Multiple Input Multiple Output)技术。进一步的说，基站102～106和终端设备108～122既可以支持单用户MIMO(Single-User MIMO，SU-MIMO)技术，也可以支持多用户MIMO(Multi-User MIMO，MU-MIMO)，其中MU-MIMO可以基于空分多址(Space Division Multiple Access，SDMA)技术来实现。由于配置有多根天线，基站102～106和终端设备108～122还可灵活支持单入单出(Single Input Single Output，SISO)技术、单入多出(Single Input Multiple Output，SIMO)和多入单出(Multiple Input Single Output，MISO)技术，以实现各种分集(例如但不限于发射分集和接收分集)和复用技术，其中分集技术可以包括例如但不限于发射分集(Transmit Diversity，TD)技术和接收分集(Receive Diversity，RD)技术，复用技术可以是空间复用(Spatial Multiplexing)技术。而且上述各种技术还可以包括多种实现方案，例如发射分集技术可以包括，Transmit Diversity。
MIMO技术的一个重要用途是发射分集(Transmit Diversity，TD)。发射分集通过在时间、频率、空间(例如天线)或者上述三个维度的各种组合上对原始信号(例如符号)进行冗余传输来提高传输可靠性。在具体实现过程中，冗余传输的数量可以根据信道模型或者信道质量进行设置，冗余传输的对象可以是原始信号本身，也可以是对原始信号进行处理后的信号，这种处理可以包括，例如但不限于，延迟、取反、共轭、旋转等处理，以及上述各种处理经过衍生、演进以及组合后获得的处理。
目前常用的发射分集包括，例如但不限于，空时发射分集(Space-Time Transmit Diversity，STTD)、空频发射分集(Space-Frequency Transmit Diversity，SFTD)、时间切换发射分集(Time Switched Transmit Diversity，TSTD)、频率切换发射分集(Frequency Switch Transmit Diversity，FSTD)、正交发射分集(Orthogonal Transmit Diversity，OTD)、循环延迟分集(Cyclic Delay Diversity，CDD)等分集方式，以及上述各种分集方式经过衍生、演进以及组合后获得的分集方式。例如，目前长期演进(Long Term Evolution，LTE)标准便采用了空时块编码(Space Time Block Coding，STBC)、空频块编码(Space Frequency Block Coding，SFBC)和CDD等发射分集方式。
上文以举例的方式对发射分集进行了的概括性的描述。本领域技术人员应当明白，除上述实例外，发射分集还包括其他多种实现方式。因此，上述介绍不应理解为对本申请技术方案的限制，本申请技术方案应理解为适用于各种可能的发射分集方案。
此外，基站102～106和终端设备108～122可采用各种无线通信技术进行通信。
伴随着通信理论和实践的不断发展，越来越多的无线通信技术开始出现并且逐步走向成熟。上述无线通信技术包括但不限于时分多址(Time Division Multiple Access，TDMA)技术、频分多址(Frequency Division Multiple Access，FDMA)技术、码分多址(Code Division Multiple Access，CDMA)技术、时分同步码分多址(Time Division-Synchronous Code Division Multiple Access，TD-SCDMA)、正交频分多址(Orthogonal FDMA，OFDMA)技术、单载波频分多址(Single Carrier FDMA，SC-FDMA)技术、空分多址(Space Division Multiple Access，SDMA)技术以及这些技术的演进及衍生技术等。上述无线通信技术作为无线接 入技术(Radio Access Technology，RAT)被众多无线通信标准所采纳，从而构建出了在今天广为人们所熟知的各种无线通信系统(或者网络)，包括但不限于全球移动通信系统(Global System for Mobile Communications，GSM)、CDMA2000、宽带CDMA(Wideband CDMA，WCDMA)、由802.11系列标准定义的WiFi、全球互通微波存取(Worldwide Interoperability for Microwave Access，WiMAX)、长期演进(Long Term Evolution，LTE)、LTE升级版(LTE-Advanced，LTE-A)、5G以及这些无线通信系统的演进系统等。如无特别说明，本申请实施例提供的技术方案可应用于上述各种无线通信技术和无线通信系统。此外，术语“系统”和“网络”可以相互替换。
应注意，图1所示的无线通信网络100仅用于举例，并非用于限制本申请的技术方案。本领域的技术人员应当明白，在具体实现过程中，无线通信网络100还可能包括其他设备，同时也可根据具体需要来配置基站和终端设备的数量。
为了更好地理解本申请实施例，在介绍本申请实施例之前，做出如下几点说明。
第一，为便于描述，在涉及编号时，可以从1开始连续编号。例如，N f个频域单元可以包括第1个频域单元至第N f个频域单元等。当然，具体实现时不限于此。比如也可以从0始连续编号。例如，N f个频域单元可以包括第0个频域单元至第N f-1个频域单元，为了简洁，这里不一一列举。另外，对应的索引可从1开始编号或从0开始编号，例如，第1个频域单元的索引是1，第N f个频域单元的索引是N f；或者，第0个频域单元的索引是0，第N f-1个频域单元的索引是N f-1。
应理解，上文所述均为便于描述本申请实施例提供的技术方案而进行的设置，而并非用于限制本申请的范围。
第二，在本申请中，多处涉及矩阵和向量的变换以及函数的运算。为便于理解，这里做统一说明。该部分所示的矩阵A、N等均为示例。
对于矩阵A，上角标T表示转置，如A T表示矩阵(或向量)A的转置。上角标H表示共轭转置，如，A H表示矩阵(或向量)A的共轭转置。
第三，在本申请中，“用于指示”可以包括用于直接指示和用于间接指示。当描述某一指示信息用于指示A时，可以包括该指示信息直接指示A或间接指示A，而并不代表该指示信息中一定携带有A。
将指示信息所指示的信息称为待指示信息，则具体实现过程中，对待指示信息进行指示的方式有很多种，例如但不限于，可以直接指示待指示信息，如待指示信息本身或者该待指示信息的索引等。也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系。还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。同时，还可以识别各个信息的通用部分并统一指示，以降低单独指示同样的信息而带来的指示开销。例如，本领域的技术人员应当明白，预编码矩阵是由预编码向量组成的，预编码矩阵中的各个预编码向量，在组成或者其他属性方面，可能存在相同的部分。
此外，具体的指示方式还可以是现有各种指示方式，例如但不限于，上述指示方式及其各种组合等。各种指示方式的具体细节可以参考现有技术，本文不再赘述。由上文所述 可知，举例来说，当需要指示相同类型的多个信息时，可能会出现不同信息的指示方式不相同的情形。具体实现过程中，可以根据具体的需要选择所需的指示方式，本申请实施例对选择的指示方式不做限定，如此一来，本申请实施例涉及的指示方式应理解为涵盖可以使得待指示方获知待指示信息的各种方法。
待指示信息可以作为一个整体一起发送，也可以分成多个子信息分开发送，而且这些子信息的发送周期和/或发送时机可以相同，也可以不同。具体发送方法本申请不进行限定。其中，这些子信息的发送周期和/或发送时机可以是预先定义的，例如根据协议预先定义的，也可以是发射端设备通过向接收端设备发送配置信息来配置的。其中，该配置信息可以例如但不限于包括无线资源控制信令、介质接入控制(medium access control，MAC)层信令和物理层信令中的一种或者至少两种的组合。其中，无线资源控制信令例如包无线资源控制(radio resource control，RRC)信令；MAC层信令例如包括MAC控制元素(control element，CE)；物理层信令例如包括下行控制信息(downlink control information，DCI)。
第四，本申请对很多特性(例如预编码矩阵指示(precoding matrix indicator，PMI)、信道、资源块(resource block，RB)、资源块组(resource block group，RBG)、子带、预编码资源块组(precoding resource block group，PRG)、资源元素(resource element,RE)等)所列出的定义仅用于以举例方式来解释该特性的功能。
第五，在下文示出的实施例中第一、第二以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的指示信息等。
第六，“预定义”或“预配置”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。其中，“保存”可以是指，保存在一个或者多个存储器中。所述一个或者多个存储器可以是单独的设置，也可以是集成在编码器或者译码器，处理器、或通信装置中。所述一个或者多个存储器也可以是一部分单独设置，一部分集成在译码器、处理器、或通信装置中。存储器的类型可以是任意形式的存储介质，本申请并不对此限定。
第七，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括LTE协议、新空口(new radio，NR)协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
第八，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b和c中的至少一项(个)，可以表示：a，或，b，或，c，或，a和b，或，a和c，或，b和c，或，a、b和c。其中a、b和c分别可以是单个，也可以是多个。
第九，在本申请实施例中，“当……时”、“在……的情况下”、“若”以及“如果”等描述均指在某种客观情况下设备(如，终端设备或者网络设备)会做出相应的处理，并非是限定时间，且也不要求设备(如，终端设备或者网络设备)在实现时一定要有判断的动作，也不意味着存在其它限定。
为便于理解本申请实施例，下面对本申请实施例中涉及到的术语做简单介绍。
1、预编码技术
预编码技术可以实现发送设备与多个接收设备在相同的时频资源上传输，也就是实现了多用户多输入多输出(multiple user multiple input multiple output，MU-MIMO)。应理解，本文中有关预编码技术的相关描述仅为便于理解而示例，并非用于限制本申请实施例的保护范围。在具体实现过程中，网络设备主要依靠终端设备向网络设备反馈的下行信道的信道状态信息(channel state information,CSI)确定的。另外，还可以通过其他方式进行预编码，例如，在无法获知信道状态信息(例如但不限于信道矩阵)的情况下，采用预先设置的预编码矩阵或者加权处理方式进行预编码等。为了简洁，其具体内容本文不再赘述。
2、时延信息、角度信息以及角度时延信息
信号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。
时延信息是无线信号在不同传输路径上的传输时间，由距离和速度决定，与无线信号的频域没有关系。信号在不同的传输路径上传输时，由于距离不同，存在不同的传输时延。由于网络设备与终端设备之间的物理位置是固定的，因而上下行信道的多径分布在时延上是相同的。因此，时延信息在FDD模式下的上下行信道可以认为是相同的，或者说，互易的。
角度信息可以是指信号经由无线信道到达接收天线的到达角(angle of arrival，AOA)，也可以是指通过发射天线发射信号的离开角(angle of departure，AOD)。在本申请实施例中，该角度信息可以是指上行信号到达网络设备的到达角，也可以是指网络设备发射下行信号的离开角。由于上下行信道在不同频率上的传输路径的互易，该上行参考信号的到达角和下行参考信号的离开角可以认为是互易的。
本文所述的角度信息实际是一个维度为N tx*1的角度向量，记为S(θ k)，N tx是网络设备的天线数目；相应地，时延信息实际是一个维度为N f*1的时延向量，记为F(τ l)，本文中，N f表示频域单元的数目，即表示参考信号的传输带宽所包含的频域单元的数目；相应地，角度时延信息实际是一个角度向量和一个时延向量的组合，任意两个角度时延信息中所包含的角度向量和时延向量中至少有一项不同，也就是说，每个角度时延信息可由一个角度向量和一个时延向量唯一确定。
3、参考信号(reference signal，RS)
参考信号也可以称为导频(pilot)、参考序列等。在本申请实施例中，参考信号可以是用于信道测量的参考信号。例如，该参考信号可以是用于下行信道测量的信道状态信息参考信号(channel state information reference signal，CSI-RS)。应理解，上文列举的参考信号仅为示例，不应对本申请构成任何限定。本申请并不排除在未来的协议中定义其他参考信号以实现相同或相似功能的可能。用于获取下行信道的信道状态信息的参考信号也可称为下行参考信号或CSI-RS。
网络设备可对参考信号进行预编码后，发送给终端设备。其中，预编码具体可以包括波束赋形(beamforming)和相位旋转。其中，波束赋形例如可以通过基于一个或多个角度向量对参考信号进行预编码来实现，相位旋转例如可以通过将一个或多个时延向量对参考信号进行预编码来实现。
其中，网络设备针对参考信号采用不同方式的预编码处理，终端设备反馈信道状态信息的方式也不同。
4、参考信号的端口(port)
参考信号的端口是指用于传输参考信号的天线端口，网络设备可配置参考信号的端口数P。本文中，参考信号的每个端口可被加载角度信息和/或时延信息，即每个端口可以是经过波束赋形和/或相位旋转后的端口。例如，每个端口的参考信号可以是基于一个角度向量和/或一个时延向量对参考信号进行预编码得到的。
每个端口的参考信号可以通过一个或者多个频域单元传输。本文中，假设参考信号的传输带宽为N f个频域单元。该N f个频域单元可以为频率连续或不连续的频域单元，相应地，本申请中阐述频域单元的索引时是基于该N f个频域单元基于频率大小等排列后的顺序，而不是系统带宽中的索引。可选的，本申请中阐述频域单元的索引时，也可采用N f个频域单元在系统带宽中的索引进行阐述，但实质相同，为便于理解和阐述，本申请不再以此进行阐述。
5、频域单元
频域单元也可称为频率单元，表示频域资源的单位，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，一个或多个子带(sub band，SB)、一个或多个资源块(RB)、一个或多个资源块组(resource block group，RBG)、一个或多个预编码资源块组(precoding resource block group，PRG)等。在以下实施例中，涉及频域单元的相关描述都通过资源块来描述。应理解，RB仅为频域单元的一例，不应对本申请构成任何限定。本申请对于频域单元的具体定义不作限定。
如上所述，基于一个或多个角度向量对参考信号进行预编码，也可以称为，将一个或多个角度向量加载到参考信号上，以实现波束赋形。基于一个或多个时延向量对参考信号进行预编码，也可以称为将一个或多个时延向量加载到参考信号上，以实现相位旋转。基于一个或多个角度时延信息对参考信号进行预编码，也可以称为将一个或多个角度时延信息加载到参考信号上，以实现波束赋形和相位旋转。
为了构建下行信道完整的信道状态信息(channel state information，CSI)，可采用上下行信道之间具有互易性的信息对参考信号进行预编码，终端设备可上报上下行信道之间不具有互易性的信息，进而，网络设备基于不具有互易性的信息和具有互易性的信息，构建完整的CSI。其中，具有互易性的信息可包括空域信息和频域信息，不具有互易性的信息可包括每个角度时延信息对应的复系数。
例如，上行信道H UL可以表示为：
H UL＝SC ULF H    (1)
其中，S是维度为N tx×N tx的空域信息矩阵，物理上对应网络设备的到达角/出发角；F是维度为N f×N f的频域信息矩阵，物理上对应到达网络设备的各个多径信号的时延；C UL是维度为N tx×N f的复系数矩阵，用于表示上行信道的各角度时延信息所对应的复系数(也可称为复系数)。
上述公式(2)以向量化表示，可转换为：
Figure PCTCN2021072359-appb-000007
其中，
Figure PCTCN2021072359-appb-000008
表示克罗内克积，vec(C UL)为上行信道的各角度时延信息所对应的复系数构成的列向量；因此，网络设备可基于公式(1)(2)可获得每个角度时延信息对应的权值构成的矩阵Z H。其中，Z H是一个维度为N fN tx×N fN tx的复数矩阵，Z H的每列是每个角度时延信息对应的权值。
基于角度时延信息的信道状态信息CSI获取方案，可包括：网络设备可将角度时延信息对应的空域权值和/或频域权值加载在参考信号的每个端口的频域单元上，获得并发送预编码后的参考信号。进而，终端设备根据参考信号进行信道估计，获得每个端口上每个频域单元的等效信道，记为
Figure PCTCN2021072359-appb-000009
其中，p表示第p个端口，n表示第n个频域单元。终端设备将每个端口的N f个频域单元上的等效信道进行累加，获得并上报每个端口加载的一个角度时延信息的复系数。这样，网络设备可基于上述所述的各角度时延信息的权值向量和下行信道的复系数矩阵C DL，构建完整的信道状态信息。其中，该复系数矩阵C DL可基于每个端口的复系数
Figure PCTCN2021072359-appb-000010
确定。
本申请实施例中，基于角度时延信息的信道状态信息CSI获取方案，与网络设备侧的角度时延信息加载方式以及终端设备侧的CSI反馈模式有关。可选的，基于角度时延信息的信道状态信息CSI获取方案，可包括但不限于以下几种CSI获取方案：
CSI获取方案1中，角度时延信息加载方式1.1是：参考信号的端口上加载的是角度时延对信息，该角度时延对信息包括一个角度信息和一个时延信息；CSI反馈模式1.1中，假终端设备将每个端口的N f个频域单元上的等效信道进行全带累加，获得并上报每个端口加载的一个角度时延对信息的复系数。
如图2所示，网络设备根据上行信道H UL估计出角度信息和时延信息，将这些角度信息和时延信息分别对应的空域权值和频域权值加载在参考信号的每个端口的频域单元上。终端设备根据参考信号，获得相应的复系数。例如，第p个端口加载的一个角度时延信息的复系数
Figure PCTCN2021072359-appb-000011
Figure PCTCN2021072359-appb-000012
其中，
Figure PCTCN2021072359-appb-000013
表示第p个端口，第n个频域单元对应的等效信道。
这样，网络设备可基于具有互易性的空域向量和频域向量，结合下行信道的复系数矩阵C DL，构建完整的信道状态信息。其中，该复系数矩阵C DL可基于每个端口的复系数
Figure PCTCN2021072359-appb-000014
确定。
另外，为了降低导频开销，可采用梳分的方式在一个端口上加载多个角度时延对信息。一种方式，对于一个端口，网络设备可采用对参考信号的传输带宽进行资源分组的方式，加载多个角度时延对信息。例如，如图3所示，假设采用2倍梳分，可将N f个资源单元按照索引奇偶的方式划分为两组，如图3所示，假设第一组包括索引为2、4、6…、N f，第二组包括1、3、…，N f-1等。其中，如图3所示，第一组加载第一个角度时延对信息的权值b1，第二组加载第二角度时延对信息的权值b2。
另外，还可通过参考信号的多个图样(RS pattern)配置或参考信号的多个资源配置实现频域资源的分组。即O个参考信号图样对应O个资源块组，或者，O个资源配置对应O个资源块组。例如，CSI-RS的资源配置中包含两个图样配置，分别对应CSI-RS图样1和CSI-RS图样2，CSI-RS端口分为两组，每个CSI-RS图样对应一组CSI-RS端口。CSI-RS端口组1中的CSI-RS端口由CSI-RS图样1配置，CSI-RS端口组2中的CSI-RS端口由CSI-RS图样2配置。
再例如，有2个CSI-RS资源，CSI-RS端口分为两组，每个CSI-RS资源对应一组CSI-RS端口。CSI-RS端口组1中的CSI-RS端口由CSI-RS资源1配置，CSI-RS端口组2中的CSI-RS端口由CSI-RS资源2配置。
还有一种降低导频开销的方式，是配置参考信号的密度小于1。例如，密度设置为0.25，表示每4个RB有一个参考信号。即参考信号的密度ρ(ρ＜1且可被1整除)，表示每1/ρ个RB中有一个参考信号。
可见，该CSI获取方案1具有网络设备侧的实现复杂度较高，终端设备侧实现复杂度较低的特点。
CSI获取方案2中，角度时延信息加载方式1.2是：参考信号的端口上加载的是角度信息，网络设备将基于上行信道测量获得的时延信息，会通过信令下发给终端设备；CSI反馈模式1.2中，与上述角度时延信息加载方式1.2或角度时延信息加载方式1.3相对应，终端设备可根据下发的时延信息，计算每个端口的复系数。
如图4所示，网络设备根据上行信道H UL估计出角度信息和时延信息，将角度信息对应的空域权值加载在参考信号的每个端口的频域单元上，同时将时延信息F下发给终端设备，例如指示时延信息对应的频域权值。终端设备根据参考信号和网络设备指示的时延信息F，获得相应的复系数
Figure PCTCN2021072359-appb-000015
例如，网络设备下发的第i个时延信息以及端口p加载的角度信息对应的复系数
Figure PCTCN2021072359-appb-000016
Figure PCTCN2021072359-appb-000017
其中，
Figure PCTCN2021072359-appb-000018
是终端设备在端口p上获得的等效信道；
Figure PCTCN2021072359-appb-000019
是频域向量，对应网络设备配置给终端设备的第i个时延信息。
这样，网络设备可基于具有互易性的空域向量和频域向量，结合下行信道的复系数矩阵C DL，构建完整的信道状态信息。其中，该复系数矩阵C DL可基于每个端口的复系数
Figure PCTCN2021072359-appb-000020
确定。
可见，该CSI获取方案2具有导频开销较小，网络设备侧的实现复杂度较低，但终端设备侧实现复杂度较高的特点。另外，对于系统性能的改善，CSI获取方案1优于CSI获取方案2。
CSI获取方案3中，角度时延信息加载方式1.3：参考信号的端口上加载的是部分角度时延对信息。例如，网络设备将获得的角度时延对信息进行分组，同一组中各角度时延对信息对应相同的角度信息，进而，网络设备将每组中的一个角度时延对信息加载在参考信号的端口上，而每组中其余的角度时延对信息中的时延信息下发给终端设备。相应的，CSI反馈模式可采用上述CSI反馈模式1.2所述的方式。
该CSI获取方案3具有导频开销较小，网络设备侧实现复杂度处于上述两种CSI获取方案之间，对于系统性能的改善，CSI获取方案3没有CSI获取方案1优，较CSI获取方案2优。
可见，不同的CSI获取方案，会使得通信系统具有不同的开销、性能以及复杂度。如果码本仅对应一种CSI获取方案的信道测量配置，将导致信道信息获取方法无法满足开销、性能以及复杂度等方面的需求。
本申请提供一种信道信息获取方法，该方法中多种参数配置组合与同一码本相关联，有利于信道信息测量的灵活配置，使得对应的CSI获取方案满足开销、性能以及复杂度等方面的需求。以下结合附图进行阐述。
请参阅图5，图5是本申请实施例提供的一种信道信息获取方法的流程示意图，该信道信息获取方法可适用于第一装置，可选的，图5以第一装置为终端设备为例进行阐述。为便于阐述，图5所示的方法从网络设备和终端设备两端进行描述，如图5所示，该信道信息获取方法可包括但不限于以下步骤：
S101、网络设备确定第一指示信息；
S102、网络设备发送该第一指示信息；
其中，该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；该多种参数配置组合与同一码本W相关联。可选的，该第一指示信息可指示一种参数配置组合的索引，本申请实施例不做限定。
S103、终端设备接收该第一指示信息；
S104、终端设备根据该第一指示信息所指示的参数配置组合，反馈信道状态信息。
本申请实施例中，该多种参数配置组合可对应网络设备侧的多种实现行为，如参考信号的端口具有的多种角度时延信息加载方式。可选的，该多种参数配置组合可以对应终端 设备侧的多种实现行为，如多种信道状态信息CSI反馈模式等。因此，多种参数配置组合与同一码本相关联，可使得这些实现方式能够采用同一码本来实现。
一种可选的实施方式中，第一指示信息所指示的参数配置组合与角度时延信息加载方式相关联。其中，角度时延信息加载方式是指网络设备发送参考信号时，在参考信号的端口上加载角度时延信息的方式。基于该实施方式，网络设备可基于不同角度时延信息加载方式的开销，对系统改善的性能以及复杂度等需求，灵活配置信道信息测量所需的参数配置组合。
可见，网络设备可通过所指示的参数配置组合，使得网络设备在同一码本下也可采用不同的角度时延信息加载方式，从而，有利于信道测量信息的灵活配置，满足系统对开销、性能以及复杂度等方面的要求。
例如，第一指示信息所指示的参数配置组合中，包括参考信号的每个端口对应的频域向量的数目K，K≥1。当该K等于1时，参考信号的端口上加载的是角度时延对信息，如角度时延信息加载方式1.1；当该K大于1时，该参考信号的端口上加载的是角度信息或部分角度时延对信息，如角度时延信息加载方式1.2或角度时延信息加载方式1.3。
也就是说，当K等于1时，终端设备针对该参考信号，不需要进行频域上的搜索，即网络设备侧发送的参考信号的端口上加载了估计得到的全部角度时延对信息，即采用角度时延加载方式1.1。当K大于1时，由于网络设备还有测得的全部或部分的时延信息未加载在参考信号上，故终端设备针对该参考信号，需要进行频域上的搜索，以获得各频域分量上的复系数等不具有互易性的信息。也即网络设备会采用角度时延信息加载方式1.2或角度时延信息加载方式1.3，向终端设备下发多个时延信息。即每个端口对应的频域向量的个数与每个端口需测量的时延信息的数量相对应。
其中，角度时延信息加载方式1.2中，网络设备将全部的时延信息下发给终端设备，而未加载在参考信号上；角度时延信息加载方式1.3中，网络设备将部分的时延信息下发给终端设备，而加载了部分的角度时延对信息在参考信号上。
再例如，第一指示信息所指示的参数配置组合中，包括参考信号的每个端口对应的K个频域向量中，允许终端设备选择的频域向量的数目M，K≥1，1≤M≤K。当M大于1时，参考信号的端口上加载的是角度信息或部分角度时延对信息。
另一种可选的实施方式中，第一指示信息所指示的参数配置组合与信道状态信息CSI反馈模式相关联。由于角度时延信息在参考信号的端口上的加载方式，关联终端设备所采用的CSI反馈模式。因此，该实施方式有利于终端设备基于所指示的参数配置组合采用对应的CSI反馈模式。
又一种可选的实施方式中，第一指示信息所指示的参数配置组合与角度时延信息加载方式相关联，第一指示信息所指示的参数配置组合还与CSI反馈模式相关联。这样，对于网络设备侧来说，网络设备可灵活选择角度时延信息加载方式；对于终端设备来说，可及时获知所需采用的对应的CSI反馈模式，从而有利于满足系统对开销、性能以及复杂度等方面的需求。其中，相关的角度时延信息加载方式以及CSI反馈模式可参见上述阐述，此处不再详述。
以下以可选的码本为示例，对本申请实施例做进一步的阐述。
实施例1，多种参数配置组合关联同一码本W。该码本W可满足如下特征：
Figure PCTCN2021072359-appb-000021
其中，W 1是维度为OP×L的角度时延信息选择矩阵或端口选择矩阵，用于指示终端设备从所述OP个角度时延信息或端口中选择的L个角度时延信息或端口，O≥1，P≥1，1≤L≤OP；O表示参考信号的每个端口上加载的角度时延对信息或角度信息的数目，或表示参考信号的资源配置的数目，或表示参考信号的图样配置的数目；P表示参考信号的一个图样配置以及一个资源配置所对应的端口的数目，或表示参考信号的端口的数目(如参考信号配置了一个资源配置和图样配置时)；
另外，W 1中，针对选择的L个角度时延信息或端口，每个极化方向上可选择相同的L/2个角度时延信息或端口，或者，每个极化方向上选择不同的L/2个角度时延信息或端口；
Figure PCTCN2021072359-appb-000022
是维度为L×M的复系数矩阵，
Figure PCTCN2021072359-appb-000023
中至多包括K 0个非零的元素，1≤K 0≤L×M；
W f是维度为N f×M的频域选择矩阵，用于指示终端设备从每个端口对应的K个频域向量中选择的M个频域向量，1≤M≤K≤N f；
第一指示信息所指示的参数配置组合中，包括该码本W的以下一个或多个参数：所述O、所述P、所述L、所述N f、所述M、所述K、所述K 0。
可选的，该码本W的上述参数的取值可通过一个或多个指示信息发送给终端设备，如由一条或多条信令分别指示，或由多条信令分级指示等。例如，P和L可作为第1类参数，O作为第2类参数，N f、M、K作为第3类参数，K 0作为第4类参数；单个信令可以同时指示第1类中一个参数和第3类中的一个参数；或者，单个信令可以同时指示第1类中一个参数，第2类中一个参数以及第3类中一个参数；或者单个信令可以同时指示第1类中一个参数，第3类中一个参数以及第4类中一个参数；或者单个信令可以同时指示第1类中一个参数，第2类中一个参数，第3类中一个参数以及第4类中一个参数。
可见，本申请实施例中，网络设备在参考信号的端口上加载的是角度时延对信息时，可设置K等于1；网络设备在参考信号的端口上加载角度信息或部分角度时延对信息时，可设置K大于1，网络设备无论采用何种实现方式，均可采用公式(5)所示的同一码本，构建信道状态信息。从而，使得网络设备可通过对W f中K或M的约束，使得各种实现方式采用同一码本即可执行。进一步的，有利于信道信息测量的灵活配置，以满足系统对性能、 开销以及复杂度等方面的需求。
例如，第一指示信息所指示的参数配置组合中K和M等于1；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，O＝4，L＝24，K 0＝24。那么，对于网络设备侧，由于K和M等于1，故可采用角度时延信息加载方式1.1所述的实现方式。对于终端设备侧，由于K和M等于1，故可采用CSI反馈模式1.1所述的实现方式，进一步的，可基于公式(5)所示的码本，构建信道状态信息。
再例如，第一指示信息所指示的参数配置组合中K等于4，或者M＝4；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，O＝1，L＝4，K 0＝24。对于网络设备侧，由于K大于1或M大于1，故可采用角度时延信息加载方式1.2或角度时延信息加载方式1.3所述的实现方式。对于终端设备侧，由于K大于1或M大于1，故可采用CSI反馈模式1.2或CSI反馈模式1.3所述的实现方式，进一步的，可基于公式(5)所示的同一码本，构建信道状态信息。
一种可选的实施方式中，网络设备可通过配置一些参数，使得公式(5)所示的码本中，W 1简化为单位矩阵。例如，当O×P小于第一值，或P小于第二值，或O等于1时，W 1是单位矩阵。其中，第一值、第二值可通过协议约定或网络设备指示的方式告知终端设备。
本申请实施例中，网络设备通过配置同一码本中W f的K或M的取值，以采用不同的实现方式，以及使得终端设备采用不同的CSI反馈方式等CSI获取方案外，还可以通过配置W f中K或M，限制其他参数的配置。
一种可选的实施方式中，当K等于1时，O≥2；或者，当K等于1时，O＝1且参考信号的密度小于1；当K大于1或M大于1时，O等于1。也就是说，K等于1，网络设备和终端设备可采用上述对应的实现方式外，还可通过在参考信号的端口上加载多个角度时延对信息，或配置多个资源或多个图样的方式，或者配置参考信号的密度小于1，降低导频开销。
例如，第一指示信息所指示的参数配置组合中K等于1，且M＝1；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，O＝4，L＝24，K 0＝24。这样，网络设备可采用角度时延信息加载方式1.1，以及每个端口加载4个角度时延对信息或配置4个资源或4个图样的方式，降低导频开销。
当K等于1且O等于1时，参考信号的密度小于1。即网络设备和终端设备可采用上述对应的实现方式外，还可通过降低参考信号的密度，以降低导频开销。例如，第一指示信息所指示的参数配置组合中K等于1，且M＝1；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，O＝1，L＝24，K 0＝16时，该参数信号的密度可设置为0.25，以降低导频开销。
当K大于1或M大于1时，O等于1。即网络设备和终端设备可采用对应的实现方式，如加载角度信息或部分角度时延对信息的方式来降低所需的导频开销，故O等于1。例如，第一指示信息所指示的参数配置组合中K等于4，且M＝4；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，O＝1，L＝4，K 0＝24。再例如，第一指示信息所 指示的参数配置组合中K等于13，且M＝4；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝13，O＝1，L＝8，K 0＝32。
可见，本申请实施例能够在满足各实现方式的性能和复杂度的需求的同时，通过参数之间的约束关系，以降低导频开销。
另一种可选的实施方式中，当O大于1时，参考信号的端口上加载的是角度时延对信息，且M和K均等于1。可见，该实施方式通过在参考信号的每个端口上加载多个角度时延对信息的方式降低开销，故W f中只需配置一个频域向量即可，避免了终端设备需要搜索多个频域向量所带来的复杂度较高的问题。
可见，该实施方式中可以通过对W 1中参数O的取值的约束，以使得网络设备可针对同一码本采用不同的实现方式，满足各实现方式的性能和导频开销的需求的同时，通过参数之间的约束关系，以降低终端侧的复杂度。
一种方式，参考信号的每个端口在每一个资源配置以及每一个图样配置上对应相同的K个频域向量。另一种方式，参考信号的每个端口在每一个资源配置以及每一个图样配置上可以对应不同的K个频域向量，其中，不同端口在每一个资源配置以及每一个图样配置上对应的K个频域向量需要分别配置。
其中，参考信号的不同资源配置对应可以不同的K个频域向量，可选的，同一资源配置对应的每个端口之间对应的K个频域向量可相同或不同。或者，参考信号的不同图样配置可以对应不同的K个频域向量，可选的，同一图样配置对应的每个端口之间对应的K个频域向量可相同或不同。或者，参考信号的不同端口对应不同的K个频域向量。
本申请实施例中，第一指示信息所指示的参数配置组合中，还包括窗口的长度K，或还包括窗口的起点以及窗口的长度K或长度2K；其中，该窗口为包括参考信号的一个端口对应的K个频域向量的可选频域向量的索引范围。
可选的，该K个频域向量的索引可以是连续的。那么，该K个频域向量的起始索引，如窗口的起点，可以是默认的，或是由第一指示信息所指示的参数配置组合中包括的，或是由其他信令指示的。
可选的，该K个频域向量的索引可以是不连续的。那么，网络设备可通过包括该K个频域向量的窗的方式指示该K个频域向量。
可选的，网络设备也可通过其他信令指示该K个频域向量的索引。
实施例2，多种参数配置组合关联同一码本W，该码本W满足如下特征：
Figure PCTCN2021072359-appb-000024
所述W 1是维度为P×L的端口选择矩阵，用于指示所述第一装置从所述P个端口中选择的L个端口，P≥1，1≤L≤P；
所述P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目或表示参考信号的端口的数目(如参考信号配置了一个资源配置和图样配置以进行信道测量时)； 另外，W 1中，针对L个端口，每个极化方向上可选择相同的L/2个端口，或者，每个极化方向上选择不同的L/2个端口；
所述
Figure PCTCN2021072359-appb-000025
是维度为L×M的复系数矩阵，所述
Figure PCTCN2021072359-appb-000026
中至多包括K 0个非零的元素，1≤K 0≤L×M；
所述W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量，1≤M≤K≤N f；
所述第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：
所述P、所述L、所述N f、所述M、所述K、所述K 0。
可选的，该码本W的上述参数的取值可通过一个或多个指示信息发送给终端设备，如由一条或多条信令分别指示，或由多条信令分级指示等。例如，P和L可作为第1类参数，N f、M、K作为第2类参数，K 0作为第3类参数；单个信令可以同时指示第1类中一个参数和第2类中的一个参数；或者，单个信令可以同时指示第1类中一个参数以及第3类中一个参数；或者单个信令可以同时指示第1类中一个参数，第3类中一个参数以及第4类中一个参数。
可见，本申请实施例中，网络设备在参考信号的端口上加载的是角度时延对信息时，可设置K等于1；网络设备在参考信号的端口上加载角度信息或部分角度时延对信息时，可设置K大于1，网络设备无论采用何种实现方式，均可采用公式(6)所示的同一码本，构建信道状态信息。从而，使得网络设备可通过对W f中K或M的约束，使得各种实现方式采用同一码本即可执行。进一步的，有利于信道信息测量的灵活配置，以满足系统对性能、开销以及复杂度等方面的需求。
例如，第一指示信息所指示的参数配置组合中K和M等于1；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝32，N f＝52，L＝24，K 0＝16。那么，对于网络设备侧，由于K和M等于1，故可采用角度时延信息加载方式1.1所述的实现方式。对于终端设备侧，由于K和M等于1，故可采用CSI反馈模式1.1所述的实现方式，进一步的，可基于公式(6)所示的码本，构建信道状态信息。可选的，P可等于24。
再例如，第一指示信息所指示的参数配置组合中K等于4，或者M＝4；该指示的参数配置组合或其他信令指示的参数配置组合中：P＝8，N f＝52，L＝4，K 0＝24。对于网络设备侧，由于K大于1或M大于1，故可采用角度时延信息加载方式1.2或角度时延信息加载方式1.3所述的实现方式。对于终端设备侧，由于K大于1或M大于1，故可采用CSI反馈模式1.2或CSI反馈模式1.3所述的实现方式，进一步的，可基于公式(6)所示的同一码本，构建信道状态信息。
一种可选的实施方式中，网络设备可通过配置一些参数，使得公式(6)所示的码本中，W 1简化为单位矩阵。例如，当P小于第三值时，W 1是单位矩阵。其中，第三值可通过 协议约定或网络设备指示的方式告知终端设备。
本申请实施例中，网络设备通过配置同一码本中W f的K或M的取值，以采用不同的实现方式，以及使得终端设备采用不同的CSI反馈方式等CSI获取方案外，还可以通过配置W f中K或M，限制其他参数的配置。
一种可选的实施方式中，当K等于1时，参考信号的密度小于1。也就是说，K等于1，网络设备和终端设备可采用上述对应的实现方式外，还可通过降低参考信号的密度，以降低导频开销。例如，第一指示信息所指示的参数配置组合中K等于1，且M＝1，该指示的参数配置组合或其他信令指示的参数配置组合中：P＝32，N f＝52，L＝24，K 0＝16，这样，网络设备可采用上述角度时延信息加载方式1.1所述的实现方式，以及终端设备可采用上述CSI反馈模式1.1所述的实现方式；进一步的，网络设备还可配置参考信号的密度为0.25，从而降低导频开销。再例如，第一指示信息所指示的参数配置组合中K等于1，且M＝1，该指示的参数配置组合或其他信令指示的参数配置组合中：P＝24，N f＝52，L＝24，K 0＝16。该示例也可实现网络设备可采用上述角度时延信息加载方式1.1所述的实现方式，以及终端设备可采用上述CSI反馈模式1.1所述的实现方式；进一步的，网络设备也可配置参考信号的密度为0.25，以降低导频开销。
可见，该实施方式能够在满足各实现方式的性能和复杂度的需求的同时，通过参数之间的约束关系，以降低导频开销。
另外，参考信号的P个端口可对应相同的K个频域向量，或者，参考信号的P个端口可对应不同的K个频域向量。
本申请实施例中，第一指示信息所指示的参数配置组合中，还包括窗口的长度K，或还包括窗口的起点以及窗口的长度K或长度2K；其中，该窗口为包括参考信号的一个端口对应的K个频域向量的可选频域向量的索引范围。
可选的，该K个频域向量的索引可以是连续的。那么，该K个频域向量的起始索引，如窗口的起点，可以是默认的，或是由第一指示信息所指示的参数配置组合中包括的，或是由其他信令指示的。
可选的，该K个频域向量的索引可以是不连续的。那么，网络设备可通过包括该K个频域向量的窗的方式指示该K个频域向量。
可选的，网络设备也可通过其他信令指示该K个频域向量的索引。
上述本申请提供的实施例中，分别从终端设备、网络设备的角度对本申请实施例提供的方法进行了介绍。为了实现本申请实施例提供的方法中的各功能，终端设备、网络设备可以包括硬件结构、软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能可以以硬件结构、软件模块、或者硬件结构加软件模块的方式来执行。下面将结合图6至图8详细描述本申请实施例的通信装置。其中，该通信装置是终端设备或网络设备；可选的，该通信装置可以为终端设备或网络设备中的装置。
图6示出了通信装置600的示意性框图，通信装置600可以执行上述方法实施例中网络设备的相关操作，该通信装置600包括但不限于：
处理单元601，用于确定第一指示信息；其中，该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；该多种参数配置组合与同一码本W相关联；
通信单元602，用于发送第一指示信息。
或者，通信装置600可以执行上述方法实施例中终端设备的相关操作，该通信装置900包括但不限于：
通信单元602，用于接收第一指示信息；
通信单元602，还用于根据该第一指示信息所指示的参数配置组合，反馈信道状态信息。其中，该第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；该多种参数配置组合与同一码本W相关联。
可选的，该通信装置600还可执行上述所述的信道信息获取方法的可选的实施方式，此处不再详述。
图7示出了通信装置700的示意性框图。
一种实现方式中，通信装置700对应上述信道信息获取方法中的终端设备。可选的，该通信装置700为执行上述各方法实施例的终端设备中的装置，如芯片、芯片系统、或处理器等。该通信装置700可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
另一种实现方式中，通信装置700对应上述信道信息获取方法中的网络设备。可选的，该通信装置700为执行上述各方法实施例的网络设备中的装置，如芯片、芯片系统、或处理器等。该通信装置700可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
通信装置700可以包括一个或多个处理器701。处理器701可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端、终端芯片，DU或CU等)进行控制，执行计算机程序，处理计算机程序的数据。
通信装置700还可以包括收发器705。收发器705可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器705可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。可选的，通信装置700还可以包括天线706。
可选的，通信装置700中可以包括一个或多个存储器702，其上可以存有指令704，该指令704可为计算机程序，所述计算机程序可在通信装置700上被运行，使得通信装置1000执行上述方法实施例中描述的方法。可选的，所述存储器702中还可以存储有数据。通信装置700和存储器702可以单独设置，也可以集成在一起。
一种实施方式中，对于通信装置700用于实现上述方法实施例中网络设备的功能：
处理器701用于执行图5中的步骤S101。
收发器705用于执行图5中的步骤S102。
另一种实施方式中，对于通信装置700用于实现上述方法实施例中终端设备的功能：
收发器705用于执行图5中的步骤S103以及S104。
在一种实现方式中，处理器701中可以包括用于实现接收和发送功能的收发器。例如该收发器可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在一种实现方式中，处理器701可以存有指令703，该指令可为计算机程序，计算机程序703在处理器701上运行，可使得通信装置700执行上述方法实施例中描述的方法。计算机程序703可能固化在处理器701中，该种情况下，处理器701可能由硬件实现。
在一种实现方式中，通信装置700可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。本申请中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency integrated circuit，RFIC)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的通信装置可以是AP MLD或AP MLD的AP，但本申请中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图7的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，计算机程序的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端设备、智能终端、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
对于通信装置可以是芯片或芯片系统的情况，可参见图8所示的芯片的结构示意图。图8所示的芯片包括处理器801和接口802。其中，处理器801的数量可以是一个或多个，接口802的数量可以是多个。
对于芯片用于实现上述方法实施例中网络设备的功能：
处理器801用于执行图5中的步骤S101。
接口802用于执行图5中的步骤S102。
可选的，该芯片还可以执行上述方法实施例中终端设备的功能：
接口802用于执行图5中的步骤S103以及S104。
可选的，该芯片还可以执行上述方法实施例中的相关实施方式，此处不再详述。
本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种实现不应被理解为超出本申请实施例保护的范围。
本申请还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机可读存储介质被计算机执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序。在计算机上加载和执行所述计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机程序可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本申请中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本申请并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本申请中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。
本申请中的预定义可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装 置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (33)

  1. 一种信道信息获取方法，其特征在于，应用于第一装置，所述方法包括：
    接收第一指示信息；
    所述第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；
    所述多种参数配置组合与同一码本W相关联；
    根据所述指示的参数配置组合，反馈信道状态信息。
  2. 一种信道信息获取方法，其特征在于，应用于第二装置，所述方法包括：
    确定第一指示信息；
    所述第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；所述多种参数配置组合与同一码本W相关联；
    发送所述第一指示信息。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述指示的参数配置组合与角度时延信息加载方式相关联；和/或，所述指示的参数配置组合与信道状态信息CSI反馈模式相关联。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，
    所述第一指示信息所指示的参数配置组合中，包括所述参考信号的每个端口对应的频域向量的数目K，K≥1；
    当所述K等于1时，所述参考信号的端口上加载的是角度时延对信息；
    当所述K大于1时，所述参考信号的端口上加载的是角度信息或部分角度时延对信息。
  5. 根据权利要求1至3任一项所述的方法，其特征在于，
    所述第一指示信息所指示的参数配置组合中，包括所述参考信号的每个端口对应的K个频域向量中，允许所述第一装置选择的频域向量的数目M，K≥1，1≤M≤K；
    当所述M大于1时，所述参考信号的端口上加载的是角度信息或部分角度时延对信息。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，
    所述码本W满足如下特征：
    Figure PCTCN2021072359-appb-100001
    所述W 1是维度为OP×L的角度时延信息选择矩阵或端口选择矩阵，用于指示所述第一装置从所述OP个角度时延信息或端口中选择的L个角度时延信息或端口，O≥1，P≥1，1≤L≤OP；
    所述O表示所述参考信号的每个端口上加载的角度时延对信息或角度信息的数目，或表示所述参考信号的资源配置的数目，或表示所述参考信号的图样配置的数目；所述P表 示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
    所述
    Figure PCTCN2021072359-appb-100002
    是维度为L×M的复系数矩阵，所述
    Figure PCTCN2021072359-appb-100003
    中至多包括K 0个非零的元素，1≤K 0≤L×M；
    所述W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量；所述N f表示所述参考信号的传输带宽包含的频域单元的数目，1≤M≤K≤N f；
    所述第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：
    所述O、所述P、所述L、所述N f、所述M、所述K、所述K 0。
  7. 根据权利要求6所述的方法，其特征在于，当所述O×P小于第一值，或所述P小于第二值，或所述O等于1时，所述W 1是单位矩阵。
  8. 根据权利要求1至5任一项所述的方法，其特征在于，
    所述码本W满足如下特征：
    Figure PCTCN2021072359-appb-100004
    所述W 1是维度为P×L的端口选择矩阵，用于指示所述第一装置从所述P个端口中选择的L个端口，P≥1，1≤L≤P；
    所述P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
    所述
    Figure PCTCN2021072359-appb-100005
    是维度为L×M的复系数矩阵，所述
    Figure PCTCN2021072359-appb-100006
    中至多包括K 0个非零的元素，1≤K 0≤L×M；
    所述W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量；所述N f表示所述参考信号的传输带宽包含的频域单元的数目，1≤M≤K≤N f；
    所述第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：
    所述P、所述L、所述N f、所述M、所述K、所述K 0。
  9. 根据权利要求8所述的方法，其特征在于，
    所述P小于第三值时，所述W 1是单位矩阵。
  10. 根据权利要求6或7所述的方法，其特征在于，
    当所述K等于1时，所述O≥2，或者，所述O＝1且所述参考信号的密度小于1；
    当所述K大于1或所述M大于1时，所述O等于1。
  11. 根据权利要求6或7所述的方法，其特征在于，
    当所述O大于1时，所述参考信号的端口上加载的是角度时延对信息，且所述M和所述K均等于1。
  12. 根据权利要求8或9所述的方法，其特征在于，
    所述K等于1时，所述参考信号的密度小于1。
  13. 根据权利要求6或7所述的方法，其特征在于，
    所述参考信号的每个端口在每一个资源配置以及每一个图样配置上对应相同的K个频域向量；或者，
    所述参考信号的不同资源配置对应不同的K个频域向量；或者，所述参考信号的不同图样配置对应不同的K个频域向量，或者，所述参考信号的不同端口对应不同的K个频域向量。
  14. 根据权利要求13所述的方法，其特征在于，
    所述第一指示信息所指示的参数配置组合中，还包括窗口的长度K，或还包括窗口的起点以及窗口的长度K或2K；
    所述窗口为包括所述参考信号的每个端口对应的所述K个频域向量的可选频域向量的索引范围。
  15. 一种通信装置，其特征在于，所述通信装置包括：
    通信单元，用于接收第一指示信息；
    所述第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；
    所述多种参数配置组合与同一码本W相关联；
    所述通信单元，还用于根据所述指示的参数配置组合，反馈信道状态信息。
  16. 一种通信装置，其特征在于，所述通信装置包括：
    处理单元，用于确定第一指示信息；
    所述第一指示信息用于指示参考信号的多种参数配置组合中的其中一种参数配置组合；所述多种参数配置组合与同一码本W相关联；
    通信单元，用于发送所述第一指示信息。
  17. 根据权利要求15或16所述的装置，其特征在于，
    所述指示的参数配置组合与角度时延信息加载方式相关联；和/或，所述指示的参数配 置组合与信道状态信息CSI反馈模式相关联。
  18. 根据权利要求15至17任一项所述的装置，其特征在于，
    所述第一指示信息所指示的参数配置组合中，包括所述参考信号的每个端口对应的频域向量的数目K，K≥1；
    当所述K等于1时，所述参考信号的端口上加载的是角度时延对信息；
    当所述K大于1时，所述参考信号的端口上加载的是角度信息或部分角度时延对信息。
  19. 根据权利要求15至17任一项所述的装置，其特征在于，
    所述第一指示信息所指示的参数配置组合中，包括所述参考信号的每个端口对应的K个频域向量中，允许所述第一装置选择的频域向量的数目M，K≥1，1≤M≤K；
    当所述M大于1时，所述参考信号的端口上加载的是角度信息或部分角度时延对信息。
  20. 根据权利要求15至19任一项所述的装置，其特征在于，
    所述码本W满足如下特征：
    Figure PCTCN2021072359-appb-100007
    所述W 1是维度为OP×L的角度时延信息选择矩阵或端口选择矩阵，用于指示所述第一装置从所述OP个角度时延信息或端口中选择的L个角度时延信息或端口，O≥1，P≥1，1≤L≤OP；
    所述O表示所述参考信号的每个端口上加载的角度时延对信息或角度信息的数目，或表示所述参考信号的资源配置的数目，或表示所述参考信号的图样配置的数目；所述P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
    所述
    Figure PCTCN2021072359-appb-100008
    是维度为L×M的复系数矩阵，所述
    Figure PCTCN2021072359-appb-100009
    中至多包括K 0个非零的元素，1≤K 0≤L×M；
    所述W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量；所述N f表示所述参考信号的传输带宽包含的频域单元的数目，1≤M≤K≤N f；
    所述第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：
    所述O、所述P、所述L、所述N f、所述M、所述K、所述K 0。
  21. 根据权利要求20所述的装置，其特征在于，当所述O×P小于第一值，或所述P小于第二值，或所述O等于1时，所述W 1是单位矩阵。
  22. 根据权利要求15至19任一项所述的装置，其特征在于，
    所述码本W满足如下特征：
    Figure PCTCN2021072359-appb-100010
    所述W 1是维度为P×L的端口选择矩阵，用于指示所述第一装置从所述P个端口中选择的L个端口，P≥1，1≤L≤P；
    所述P表示所述参考信号的一个图样配置以及一个资源配置所对应的端口的数目；
    所述
    Figure PCTCN2021072359-appb-100011
    是维度为L×M的复系数矩阵，所述
    Figure PCTCN2021072359-appb-100012
    中至多包括K 0个非零的元素，1≤K 0≤L×M；
    所述W f是维度为N f×M的频域选择矩阵，用于指示所述第一装置从所述每个端口对应的K个频域向量中选择的M个频域向量；所述N f表示所述参考信号的传输带宽包含的频域单元的数目，1≤M≤K≤N f；
    所述第一指示信息所指示的参数配置组合中，包括所述码本W的以下一个或多个参数：
    所述P、所述L、所述N f、所述M、所述K、所述K 0。
  23. 根据权利要求22所述的装置，其特征在于，
    所述P小于第三值时，所述W 1是单位矩阵。
  24. 根据权利要求20或21所述的装置，其特征在于，
    当所述K等于1时，所述O≥2，或者，所述O＝1且所述参考信号的密度小于1；
    当所述K大于1或所述M大于1时，所述O等于1。
  25. 根据权利要求20或21所述的装置，其特征在于，
    当所述O大于1时，所述参考信号的端口上加载的是角度时延对信息，且所述M和所述K均等于1。
  26. 根据权利要求22或23所述的装置，其特征在于，
    所述K等于1时，所述参考信号的密度小于1。
  27. 根据权利要求20或21所述的装置，其特征在于，
    所述参考信号的每个端口在每一个资源配置以及每一个图样配置上对应相同的K个频域向量；或者，
    所述参考信号的不同资源配置对应不同的K个频域向量；或者，所述参考信号的不同图样配置对应不同的K个频域向量，或者，所述参考信号的不同端口对应不同的K个频域 向量。
  28. 根据权利要求27所述的装置，其特征在于，
    所述第一指示信息所指示的参数配置组合中，还包括窗口的长度K，或还包括窗口的起点以及窗口的长度K或2K；
    所述窗口为包括所述参考信号的每个端口对应的所述K个频域向量的可选频域向量的索引范围。
  29. 如权利要求15至28任一项所述的装置，其特征在于，所述通信单元为收发器，所述处理单元为处理器。
  30. 一种处理器，其特征在于，用于执行权利要求1、或3至14中任一项所述的方法；或者用于执行权利要求2至14中任一项所述的方法。
  31. 一种通信设备，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于执行存储器中存储的计算机程序，以执行权利要求1、或3至14中任一项所述的方法；或者以执行权利要求2至14中任一项所述的方法。
  32. 一种计算机可读存储介质，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行权利要求1、或3至14中任一项所述的方法；或者执行权利要求2至14中任一项所述的方法。
  33. 一种包含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，使得计算机执行权利要求1、或3至14中任一项所述的方法；或者执行权利要求2至14中任一项所述的方法。
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