WO2022068616A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022068616A1
WO2022068616A1 PCT/CN2021/119116 CN2021119116W WO2022068616A1 WO 2022068616 A1 WO2022068616 A1 WO 2022068616A1 CN 2021119116 W CN2021119116 W CN 2021119116W WO 2022068616 A1 WO2022068616 A1 WO 2022068616A1
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WIPO (PCT)
Prior art keywords
terminal device
delay information
delay
network device
information
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PCT/CN2021/119116
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English (en)
French (fr)
Inventor
高昕宇
刘鹍鹏
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21874277.3A priority Critical patent/EP4210239A4/en
Publication of WO2022068616A1 publication Critical patent/WO2022068616A1/zh
Priority to US18/192,032 priority patent/US20230231742A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • 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
    • H04B7/0417—Feedback systems
    • 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
    • H04B7/0413—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
    • H04B7/0481—Special codebook structures directed to feedback optimisation using subset selection of codebooks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
  • the base station estimates the uplink channel information by receiving the sounding reference signal (SRS) sent by the user, and then uses TDD uplink and downlink channel reciprocity acquires downlink channel information, and then designs corresponding precoding for downlink data transmission.
  • SRS sounding reference signal
  • the signal-to-interference-noise ratio of SRS is usually very low ( ⁇ 0 decibel (dB)), and the accuracy of uplink channel estimation needs to be improved.
  • the present application provides a communication method and device for improving uplink channel estimation accuracy.
  • Embodiments of the present application provide a communication method and apparatus, which are used to more flexibly disable downlink channel sounding.
  • a communication method is provided.
  • the method may be performed by a first communication apparatus, and the first communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the first communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device.
  • the first communication device is a terminal device as an example for description.
  • the method includes: a terminal device sends an uplink pilot signal to a network device.
  • the terminal device receives the downlink pilot signal from the network device, and determines a first delay information set according to the downlink pilot signal, where the first delay information set includes P pieces of first delay information, and the Among the P pieces of first delay information, the p-th first delay information is related to a downlink channel between the network device and the terminal device, and the p-th first delay information is related to a downlink channel between the network device and the terminal device.
  • the downlink channel is a downlink channel between a sending port of the network device and a receiving port of the terminal device; the p-th first delay information is used to indicate at least one of the following: The number N p of the paths of the downlink channel corresponding to the first delay information, where N p is a positive integer; or, for the respective delay gains of L paths among the N p paths, L is a positive integer less than or equal to N p ; or , the respective delay positions of the N p paths of the downlink channel corresponding to the p th first delay information.
  • the terminal device may also send the first set of delay information to the network device.
  • the first delay information set is used for uplink channel estimation.
  • the terminal device can send the uplink pilot signal, and the terminal device can obtain the first delay information set according to the downlink pilot signal from the network device, and the network device considers the first delay information set when estimating the uplink channel
  • the uplink channel is estimated jointly with the uplink pilot signal, which can improve the accuracy of the uplink channel estimation.
  • the first set of delay information is carried through downlink channel state information.
  • the terminal device may receive second delay information from the network device, where the second delay information is used to indicate that the K' sending ports of the terminal device are sent to the network
  • the number T of paths of uplink channels between M' receiving ports of the device, where T is a positive integer; and/or the sum of the K' transmitting ports of the terminal device and the M' receiving ports of the network device The respective time delay positions of the T paths of the uplink channel between them.
  • the processing module can determine the first delay information set based on the downlink pilot signal and the second delay information, so that the first delay information set can be determined more efficiently.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, N p ⁇ T, and the The p pieces of first delay information are specifically used to indicate the indices of the delay positions of the N p paths in the delay positions of the T paths, so as to reduce overhead.
  • the terminal device receives first information from the network device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, wherein the downlink pilot signal is The frequency domain positions are distributed at unequal intervals, which can further improve the estimation accuracy of the uplink channel.
  • the terminal device determines the frequency domain position of the downlink pilot signal based on the second delay information.
  • the terminal device may receive second information from the network device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second information is further used to instruct the terminal device to receive the second delay information.
  • a communication method is provided.
  • the method may be performed by a second communication apparatus, and the second communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the second communication apparatus is a network device (such as a base station), or a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • the second communication device is a network device as an example for description.
  • the method includes: a network device receives an uplink pilot signal from a terminal device.
  • the network device sends a downlink pilot signal to the terminal device, and receives the first delay information set from the terminal device.
  • the first delay information set includes P pieces of first delay information, the p-th first delay information in the P pieces of first delay information and a downlink between the network device and the terminal device channel-related, the downlink channel related to the p-th first delay information is a downlink channel between a sending port of the network device and a receiving port of the terminal device, and the p-th first delay information
  • the delay information is used to indicate at least one of the following: the number N p of downlink channel paths corresponding to the p-th first delay information, where N p is a positive integer; or, L among the N p paths
  • the delay gain of each path, L is a positive integer less than or equal to Np; or, the time delay positions of the Np paths of the downlink channel corresponding to the pth first delay information
  • the first set of delay information is carried through downlink channel state information.
  • the network device sends second delay information to the terminal device, where the second delay information is used to indicate that the K' sending ports of the terminal device communicate with the network device
  • the number T of paths of uplink channels between M' receiving ports, where T is a positive integer; and/or the uplink between K' transmitting ports of the terminal device and M' receiving ports of the network device The respective delay positions of the T paths of the channel.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, and N p ⁇ T.
  • the p-th first delay information is specifically used to indicate an index of the delay positions of the N p paths in the delay positions of the T paths.
  • the network device sends first information to the terminal device, where the first information is used to indicate a frequency domain location of the downlink pilot signal, where the frequency of the downlink pilot signal is Domain locations are unequally spaced.
  • the network device sends second information to the terminal device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second signaling is further used to instruct the terminal device to receive the second delay information.
  • a communication method is provided.
  • the method may be performed by a first communication apparatus, and the first communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the first communication apparatus is a terminal device, or a chip provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device.
  • the first communication device is a terminal device as an example for description.
  • the method includes: the terminal device sends the uplink pilot signal of the first carrier unit to the network device.
  • the terminal device receives the downlink pilot signal from the second carrier unit of the network device to the Fth carrier frequency unit, where F is a positive integer greater than or equal to 2, and the first carrier unit is the second carrier unit to one of the Fth carrier frequency units.
  • the terminal device determines third delay information according to the downlink pilot signal, where the third delay information and the distance between the M sending ports of the network device and the K receiving ports of the terminal device are The downlink channel from the second carrier unit to the Fth carrier unit is related, and the third delay information is used to indicate: the number of paths R 1 of the downlink channel, R 1 is a positive integer; and/or, the The respective time delay positions of the downlink channel R 1 paths.
  • the terminal device sends the third delay information to the network device.
  • the network device can more accurately estimate the uplink channel on the second carrier element to the Fth carrier element according to the SRS on the first carrier element, wherein the first carrier element belongs to the second carrier element to the Fth carrier element. one to improve transmission performance.
  • the terminal device may determine the third delay information according to the uplink pilot signal and the downlink pilot signal.
  • the terminal device may determine R 2 delay positions of the downlink channel according to the downlink pilot signals from the second carrier element to the Fth carrier element, where R 2 is greater than or equal to R 1 A positive integer; the terminal equipment selects R 1 delay positions from the R 2 delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit; the terminal equipment selects R 1 delay positions according to the The R 1 delay positions determine the third delay information.
  • R 2 is greater than or equal to R 1 A positive integer
  • the terminal equipment selects R 1 delay positions from the R 2 delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit; the terminal equipment selects R 1 delay positions according to the The R 1 delay positions determine the third delay information.
  • the third delay information is carried through downlink channel state information.
  • the terminal device may receive fourth information from the network device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • a communication method is provided.
  • the method may be performed by a second communication apparatus, and the second communication apparatus may be a communication apparatus or a communication apparatus, such as a chip, capable of supporting the functions required by the communication apparatus to implement the method.
  • the second communication apparatus is a network device (such as a base station), or a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • the second communication device is a network device as an example for description.
  • the method includes: the network device receives an uplink pilot signal from the first carrier unit of the terminal device.
  • the network device sends the downlink pilot signal from the second carrier unit to the F-th carrier unit to the terminal device, where F is a positive integer greater than or equal to 2, and the first carrier unit is the second carrier unit to the F-th carrier unit. one of the F-th carrier frequency units.
  • the network device receives third delay information from the terminal device, the third delay information is determined according to the downlink pilot signal, and the third delay information is related to the M transmission ports of the network device.
  • the third delay information is used to indicate: the number of paths of the downlink channel R 1 , R 1 is a positive integer; and/or the respective time delay positions of the downlink channels R 1 .
  • the network device determines, according to the third delay information and the uplink pilot signal, the second carrier unit between the K' sending ports of the terminal device and the M' receiving ports of the network device to the uplink channel of the F-th carrier unit.
  • the third delay information is carried through downlink channel state information.
  • the network device sends fourth information to the terminal device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • a communication device is provided, for example, the communication device is the aforementioned first communication device.
  • the first communication apparatus is configured to execute the method in the above-mentioned first aspect, the third aspect or any possible implementation manner thereof.
  • the first communication apparatus may include a module for executing the method in the first aspect, the third aspect or any possible implementation manner thereof, for example, including a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions.
  • the first communication apparatus is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the transceiving module may be implemented by a transceiver, and the processing module may be implemented by a processor.
  • the sending module may be implemented by a transmitter
  • the receiving module may be implemented by a receiver
  • the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions.
  • the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device.
  • the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.
  • the first communication apparatus is continued to be a terminal device, and the processing module and the transceiver module are used as examples for introduction.
  • the transceiver module may be configured to send an uplink pilot signal to a network device, and receive a downlink pilot signal from the network device.
  • the processing module may be configured to determine a first delay information set according to the downlink pilot signal, where the first delay information set includes P pieces of first delay information, and the pth of the P pieces of first delay information
  • the first delay information is related to a downlink channel between the network device and the terminal device, and the downlink channel related to the p-th first delay information is a sending port of the network device to The downlink channel between one receiving port of the terminal device; the p-th first delay information is used to indicate at least one of the following: the path of the downlink channel corresponding to the p-th first delay information
  • the number N p where N p is a positive integer; or, for the respective delay gains of L paths among the N p paths, L is a positive integer less than or equal to N p ; or, it is the same as the p-th first delay
  • the first set of delay information is carried through downlink channel state information.
  • the transceiver module may also receive second delay information from the network device, where the second delay information is used to indicate that the K' sending ports of the terminal device are sent to the The number T of paths of uplink channels between M' receiving ports of the network device, where T is a positive integer; and/or K' transmitting ports of the terminal device and M' receiving ports of the network device The respective time delay positions of the T paths between the uplink channels. Then, the processing module can determine the first delay information set based on the downlink pilot signal and the second delay information, so that the first delay information set can be determined more efficiently.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, N p ⁇ T, and the The p pieces of first delay information are specifically used to indicate the indices of the delay positions of the N p paths in the delay positions of the T paths, so as to reduce overhead.
  • the transceiver module may further receive first information from the network device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, wherein the downlink pilot signal is The frequency domain positions are distributed at unequal intervals, which can further improve the estimation accuracy of the uplink channel.
  • the processing module may be configured to determine the frequency domain position of the downlink pilot signal based on the second delay information.
  • the transceiver module may also receive second information from the network device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second information is further used to instruct the terminal device to receive the second delay information.
  • the beneficial effects of the communication device may refer to the beneficial effects in the first aspect and its possible designs.
  • the transceiver module may send the uplink pilot signal of the first carrier unit to the network device, and receive the downlink pilot signal from the second carrier unit to the Fth carrier unit from the network device signal, wherein F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the F-th carrier frequency unit.
  • the processing module may determine third delay information according to the downlink pilot signal, the third delay information and the third delay information between the M sending ports of the network device and the K receiving ports of the terminal device.
  • the downlink channel from the second carrier unit to the Fth carrier unit is related, and the third delay information is used to indicate: the number of paths R 1 of the downlink channel, R 1 is a positive integer; and/or, the downlink channel Channel R 1 path delay position respectively.
  • the transceiver module may also send the third delay information to the network device.
  • the processing module may determine the third delay information according to the uplink pilot signal and the downlink pilot signal.
  • the processing module may determine R 2 delay positions of the downlink channel according to the downlink pilot signals from the second carrier unit to the Fth carrier unit, where R 2 is a positive integer greater than or equal to R 1
  • the processing module can select R 1 time delay positions from the R 2 time delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit;
  • the processing module can select R 1 time delay positions according to the R 1 time delay positions
  • the delay position determines the third delay information.
  • the third delay information is carried through downlink channel state information.
  • the transceiver module may further receive fourth information from the network device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • the beneficial effects of the communication device may refer to the beneficial effects in the third aspect and its possible designs.
  • a communication device is provided, for example, the communication device is the aforementioned second communication device.
  • the second communication device is configured to perform the method in the second aspect, the fourth aspect or any possible implementation manner thereof.
  • the second communication apparatus may include a module for executing the method in the second aspect, the fourth aspect or any possible implementation manner thereof, for example, including a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module, and the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions.
  • the second communication apparatus is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a network device.
  • the second communication device is a network device
  • the network device is the aforementioned network device.
  • the transceiver module can also be implemented by a transceiver
  • the processing module can also be implemented by a processor.
  • the sending module may be implemented by a transmitter
  • the receiving module may be implemented by a receiver
  • the transmitter and the receiver may be different functional modules, or may be the same functional module but capable of implementing different functions.
  • the transceiver is implemented by, for example, an antenna, a feeder, a codec and the like in the communication device.
  • the second communication device is a chip provided in the communication device
  • the transceiver (or the transmitter and the receiver) is, for example, a communication interface in the chip, and the communication interface is connected with the radio frequency transceiver component in the communication device to Send and receive information through radio frequency transceiver components.
  • the second communication apparatus is continued to be a network device, and the processing module and the transceiver module are used as examples for introduction.
  • the transceiver module may receive an uplink pilot signal from a terminal device, send a downlink pilot signal to the terminal device, and receive a first signal from the terminal device.
  • the first delay information set includes P pieces of first delay information, the p-th first delay information in the P pieces of first delay information and a downlink between the network device and the terminal device channel-related, the downlink channel related to the p-th first delay information is a downlink channel between a sending port of the network device and a receiving port of the terminal device, and the p-th first delay information
  • the delay information is used to indicate at least one of the following: the number N p of downlink channel paths corresponding to the p-th first delay information, where N p is a positive integer; or, L among the N p paths The delay gain of each path, L is a positive integer less than or equal to Np; or, the time delay positions of the Np paths of the downlink channel corresponding to the pth first
  • the first set of delay information is carried through downlink channel state information.
  • the transceiver module may also send second delay information to the terminal device, where the second delay information is used to indicate that the K' sending ports of the terminal device communicate with the network device.
  • the number T of paths of uplink channels between M' receiving ports, where T is a positive integer; and/or the uplink between K' transmitting ports of the terminal device and M' receiving ports of the network device The respective delay positions of the T paths of the channel.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, and N p ⁇ T.
  • the p-th first delay information is specifically used to indicate an index of the delay positions of the N p paths in the delay positions of the T paths.
  • the transceiver module may further send first information to the terminal device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, where the frequency of the downlink pilot signal is Domain locations are unequally spaced.
  • the transceiver module may further send second information to the terminal device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second signaling is further used to instruct the terminal device to receive the second delay information.
  • the beneficial effects of the communication device may refer to the beneficial effects in the second aspect and its possible designs.
  • the transceiver module may receive the uplink pilot signal from the first carrier unit of the terminal device, and send the downlink pilot signal from the second carrier unit to the Fth carrier unit to the terminal device signal, wherein F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the F-th carrier frequency unit.
  • the transceiver module may also receive third delay information from the terminal device, the third delay information is determined according to the downlink pilot signal, and the third delay information is related to the M transmission ports of the network device.
  • the third delay information is used to indicate: the number of paths of the downlink channel R 1 , R 1 is a positive integer; and/or the respective time delay positions of the downlink channels R 1 .
  • the processing module may determine, according to the third delay information and the uplink pilot signal, the number of units of the second carrier between the K' transmit ports of the terminal device and the M' receive ports of the network device.
  • the uplink channel of the F-th carrier unit may be determined, according to the third delay information and the uplink pilot signal, the number of units of the second carrier between the K' transmit ports of the terminal device and the M' receive ports of the network device.
  • the third delay information is carried through downlink channel state information.
  • the transceiver module may send fourth information to the terminal device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • the beneficial effects of the communication device may refer to the beneficial effects in the fourth aspect and its possible designs.
  • a communication system in a seventh aspect, includes the communication device of the fifth aspect or the communication device of the sixth aspect.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store computer instructions, and when the computer instructions are executed on a computer, the computer is made to execute the above-mentioned first to fourth aspects. or the method described in any of its possible embodiments.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used for storing computer instructions, and when the computer instructions are executed on a computer, the computer is made to execute the above-mentioned first to fourth aspects. or the method described in any of its possible embodiments.
  • a tenth aspect provides a computer program product comprising instructions, the computer program product is used to store computer instructions, when the computer instructions are executed on a computer, the computer is made to perform the above-mentioned first to fourth aspects or The method described in any of its possible embodiments.
  • FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a frequency domain resource of an SRS provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of an SRS signal expression manner provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a delay domain SRS channel provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic logical diagram of another communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application.
  • the present application provides a communication method.
  • the present application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific operation methods in the method embodiments described below can also be applied to the apparatus embodiments or the system embodiments.
  • the measurement feedback method provided in this embodiment of the present application may be applied to a wireless communication system, and the wireless communication system may include a terminal device 101 and a network device 102 .
  • the above wireless communication system is applicable to both a low frequency scenario (sub 6G) and a high frequency scenario (above 6G).
  • Application scenarios of the wireless communication system include, but are not limited to, fifth-generation systems, new radio (NR) communication systems, or future evolved public land mobile network (PLMN) systems, and the like.
  • NR new radio
  • PLMN public land mobile network
  • the terminal device 101 shown above may be a user equipment (UE), a terminal (terminal), an access terminal, a terminal unit, a terminal station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile terminal ( mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc.
  • the terminal device 101 may have a wireless transceiver function, which can communicate with one or more network devices of one or more communication systems (eg, wireless communication), and accept network services provided by the network devices, where the network devices include but not
  • the network device 102 is limited to the illustration.
  • the terminal device 101 may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMN networks, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the terminal device 101 can be deployed on land, including indoor or outdoor, handheld or vehicle; the terminal device 101 can also be deployed on water (such as ships, etc.); the terminal device 101 can also be deployed in the air (such as aircraft, balloons and satellites) superior).
  • the terminal device 101 may specifically be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial control (industrial control) wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the terminal device 101 may also be a communication chip with a communication module, a vehicle with a communication function, or an in-vehicle device (such as an in-vehicle communication device, an in-vehicle communication chip) or the like.
  • the network device 102 may be an access network device (or an access network point).
  • the access network device refers to a device that provides a network access function, such as a radio access network (radio access network, RAN) base station, and the like.
  • the network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, and the like.
  • the network device 101 may further include a relay station (relay device), an access point, a base station in a future 5G network, a base station in a future evolved PLMN network, or an NR base station, and the like.
  • the network device 102 may be a wearable device or a vehicle-mounted device.
  • the network device 102 may also be a chip with a communication module.
  • the network device 102 includes but is not limited to: a next-generation base station (g nodeB, gNB) in 5G, an evolved node B (evolved node B, eNB) in an LTE system, a radio network controller (radio network controller, RNC) , wireless controller, base station controller (BSC), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting point) under the CRAN system and receiving point, TRP), transmitting point (transmitting point, TP) or mobile switching center, etc.
  • the network device 101 may also include a base station in a future 6G or newer mobile communication system.
  • the channel sounding method may include uplink channel sounding based on uplink pilot signals (or uplink sounding reference signals) and downlink channel sounding based on downlink pilot signals (or downlink sounding reference signals).
  • a typical downlink channel sounding is performed based on a downlink channel state information reference signal (channel state information reference signal, CSI-RS), that is, the terminal device 101 performs the CSI-RS signal sent by the network device 102 according to the CSI resource configuration sent by the network device 102. Measurement is performed to obtain downlink channel characteristics, and the terminal device 101 reports the downlink channel characteristics to the network device 102 according to the CSI reporting configuration sent by the network device 102 .
  • CSI-RS channel state information reference signal
  • Uplink channel sounding is generally performed based on uplink sounding reference signal (SRS), that is, the network device 102 sends the SRS configuration to the terminal device 101, the terminal device 101 sends the SRS according to the SRS configuration, and the network device 102 sends the SRS configuration to the terminal device 102.
  • SRS uplink sounding reference signal
  • the SRS sent by the device 101 is measured to obtain uplink channel characteristics.
  • the essential idea of sparse SRS technology is to enable the channels of different users (that is, different terminal devices) to be orthogonal in the delay domain through SRS pattern and sequence design.
  • the channels of UE1 and UE2 are respectively
  • the time delay domain is orthogonal, so the same frequency domain resources are occupied in the frequency domain, so that more terminal devices can be multiplexed under the same SRS overhead.
  • the network device After the network device receives the sparse SRS, it will first estimate the equivalent delay domain channel superimposed by each terminal device, and then restore the channel of each terminal device through delay shifting. There are technical instructions.
  • the existing sparse SRS channel estimation schemes make use of the sparseness of the frequency-domain channel in the delay domain (ie, a small number of delay taps contain most of the energy of the channel).
  • the SRS signal of the jth port of the terminal device received by the ith port of the network device is y ij , it can be expressed as:
  • h ij represents the frequency domain channel between the i-th receiving port of the network device and the j-th sending port of the terminal device on the sub-carrier for sending the SRS
  • A represents the discrete Fourier transform (discrete fourier transform, DFT) row extraction matrix
  • the DFT row extraction matrix is obtained by row extraction of the DFT matrix according to the subcarrier position of the transmitted SRS
  • n ij represents the additive noise vector between the jth sending port of the terminal device received by the ith receiving port of the network device .
  • the delay domain channel is estimated from the received SRS signal y ij
  • the problem of is equivalent to a sparse signal reconstruction problem, which can be solved by using a classical compressed sensing algorithm, such as an orthogonal matching pursuit (OMP) algorithm.
  • OMP orthogonal matching pursuit
  • the number of delay paths (or simply paths) to be estimated in the equivalent delay domain channel will increase exponentially, which will lead to a decrease in the estimation accuracy of the uplink channel, among which, A delay path corresponds to an element in the delay channel vector.
  • the signal-to-noise ratio of SRS is usually very low ( ⁇ 0 decibel (dB)), and the delay path is difficult to estimate accurately, which will also seriously affect the uplink channel estimation. precision. Therefore, it can be seen that in order to fully obtain the gain brought by the high multiplexing capability of the sparse SRS, the bottleneck problem of low uplink channel estimation accuracy must be solved first.
  • the communication method may be implemented by a first communication device and a second communication device.
  • the first communication apparatus may include a terminal device or a component in the terminal device (such as a processor, a circuit, a chip or a chip system, etc.), and the terminal device here is, for example, the terminal device 101 shown in FIG. 1 .
  • the second communication apparatus may include a network device or a component in the network device (such as a processor, a circuit, a chip or a chip system, etc.), where the network device is, for example, the network device 102 shown in FIG. 1 .
  • the method may include the following steps:
  • a terminal device sends an uplink pilot signal to a network device, for example, the terminal device sends an SRS.
  • the network device may send an uplink pilot signal configuration (or configuration information of an uplink pilot signal) to the terminal device.
  • the uplink pilot signal is an SRS
  • the configuration of the uplink pilot signal may include a resource set of the SRS
  • the resource set of the SRS is used for the terminal device to send the SRS.
  • the uplink pilot signal here is sparse SRS.
  • the network device receives the uplink pilot signal from the terminal device.
  • the network device sends a downlink pilot signal to the terminal device, for example, the network device sends a CSI-RS to the terminal device.
  • the terminal device receives the downlink pilot signal from the network device.
  • the network device may send the downlink channel state information feedback configuration (or the configuration information of the downlink channel state information feedback) to the terminal device, so that the terminal device sends the downlink channel state information to the network device according to the feedback configuration.
  • the terminal device obtains the downlink channel state information according to the downlink pilot signal.
  • the downlink pilot signal is CSI-RS
  • the downlink channel state information may include CSI.
  • the downlink channel state information is CSI
  • the CSI feedback configuration can be used to configure the content of CSI feedback, for example, to configure the terminal equipment to feed back a channel quality indicator (channel quality indicator, CQI) and/or a rank indicator (rank indicator, RI) etc.
  • the terminal device may send the CQI and/or RI to the network device according to the content of the CSI feedback.
  • the downlink channel state information feedback configuration can be used to configure the terminal device to report the first delay information set to the network device.
  • the information of the information collection can be used to configure the terminal device to report the first delay information set to the network device.
  • the information of the information collection can be used to configure the terminal device to report the first delay information set to the network device.
  • the terminal device determines the first delay information set according to the downlink pilot signal.
  • the first delay information set includes P pieces of first delay information, the pth first delay information in the P pieces of first delay information and a downlink channel between the network device and the terminal device
  • the downlink channel related to the p-th first delay information is the downlink channel between a sending port (or called a transmitting port) of the network device and a receiving port of the terminal device, for example, it is the downlink channel of the network device.
  • the value of P can also be set to other values, such as a constant.
  • the value of P may be determined in a pre-configured manner, or indicated by a network device (for example, a configuration indication is fed back through downlink channel state information).
  • the p-th first delay information may be used to indicate at least one of the following:
  • N p The number N p of downlink channel paths corresponding to the p-th first delay information, where N p is a positive integer; or,
  • the p th first delay information may be used to indicate the N p most energy delay paths of the downlink channel corresponding to the p th first delay information determined according to the downlink pilot signal.
  • N p can be expressed as N ij .
  • S104 The terminal device sends the first delay information set to the network device.
  • the network device receives the first set of delay information.
  • the terminal device may determine and send the first set of delay information to the network device according to the downlink channel state information feedback configuration, or the network device may instruct the terminal device to determine and send the first set of delay information to the network device through information other than the downlink channel state information feedback configuration.
  • a set of delay information, or a terminal device may determine and send the first set of delay information to the network device according to the pre-configuration.
  • the terminal device may carry the first delay information set in the downlink channel state information fed back to the network device.
  • the terminal device may carry the first set of delay information in the CSI report.
  • the CSI report may be used to feed back downlink channel information, for example, to carry the content of the CSI feedback.
  • the terminal device may carry the first set of delay information in the downlink CSI.
  • the terminal device may also send the first delay information set to the network device by means other than the downlink channel state information.
  • the terminal device sends the first delay information set to the network device through separate signaling other than the downlink channel state information.
  • the network device determines the uplink channels between the K' sending ports of the terminal device and the M' receiving ports of the network device according to the first delay information set and the uplink pilot signal.
  • the terminal device can send the uplink pilot signal, and the terminal device can obtain the first delay information set according to the downlink pilot signal from the network device, and the network device considers the first delay information set when estimating the uplink channel
  • the uplink channel is estimated jointly with the uplink pilot signal. Since the downlink transmit power is higher than the uplink transmit power, the terminal device can generally obtain the downlink channel information more accurately.
  • the network device can estimate the first The time delay information set and the uplink pilot signal are used for joint uplink channel estimation, so the accuracy of the uplink channel estimation can be improved.
  • the uplink pilot signal includes sparse SRS
  • a more accurate uplink channel estimation result can be obtained without increasing the SRS overhead, and the accuracy of the channel estimation based on the sparse SRS can be improved.
  • the terminal device may receive the second delay information from the network device, and determine the first delay information set according to the second delay information and the downlink pilot signal.
  • the second delay information may indicate the number T of paths of uplink channels between the K' sending ports of the terminal device and the M' receiving ports of the network device, where T is a positive integer; and/or, the second delay
  • the information may indicate the respective time delay positions of the T paths of the uplink channel between the K' sending ports of the terminal device and the M' receiving ports of the network device.
  • the delay positions of the N p paths in the p-th first delay information are sub-sets of the set consisting of the respective delay positions of the T paths of the second delay information. set, N p ⁇ T.
  • the p-th first delay information is specifically used to indicate an index of the delay positions of the N p paths in the delay positions of the T paths.
  • the network device may determine the second delay information according to the uplink pilot signal in S101.
  • the following describes the manner in which the network device determines the second delay information by taking the uplink pilot signal as an SRS as an example with reference to FIG. 5 .
  • h ij represents the frequency domain channel between the i-th receiving port of the network device and the j-th sending port of the terminal device on the sub-carrier for sending the SRS
  • A represents the DFT row extraction matrix
  • the DFT row extraction matrix is based on the sub-carrier that transmits the SRS.
  • the position is obtained by row extraction of the DFT matrix, represents the delay domain channel between the ith receiving port of the network device and the jth sending port of the terminal device
  • n ij represents the additive noise vector between the ith receiving port of the network device and the jth sending port of the terminal device.
  • M' represents the total number of receiving ports of the network device
  • K' represents the total number of transmitting ports of the terminal device
  • N represents the additive noise matrix
  • S( ⁇ ) is the delay position extraction function.
  • the network device may send second delay information to the terminal device, where the second delay information may indicate T.
  • the second delay information may indicate the number of elements T included in T, that is, the number of paths of uplink channels between the K' sending ports of the terminal device and the M' receiving ports of the network device; and/ Or, the second delay information may indicate the T elements included in T, that is, the respective delay positions of the T paths of the uplink channel between the K' transmitting ports of the terminal device and the M' receiving ports of the network device.
  • Y shown in formula 2 can be multiplied by A H , and then several rows of the multiplied matrix A H Y with the largest energy can be obtained to obtain T, A H represents the transposed matrix of A.
  • formula 2 is a system model formula, and there are many equivalent transformations. It should not be understood that this formula is the only way to determine the expression of Y. For example, Y, Or N, etc. are all converted from matrices to vectors, etc.
  • the second delay information may include all T elements in T, or in other words, the second delay information may include T.
  • the network device can send all elements in T with only need to follow Bits are quantized, where is the round-up function.
  • the i-th sending port (1 ⁇ i ⁇ M) only needs to be The downlink pilot signal is sent on Q ⁇
  • Q is the number of frequency domain positions in P, or the number of elements in P, which can be expressed as
  • the set P is a set of frequency domain positions (or sub-carrier positions) for sending downlink pilot signals.
  • the frequency domain positions of the downlink pilot signals may be distributed at unequal intervals.
  • the unequally spaced distribution means that the subcarriers occupied by all the pilot signals included in the set P are unevenly distributed.
  • the numbers of the subcarriers occupied by all the pilot signals included in the set P are l 0 , l 1 , ... l Q respectively. , then l 0 , l 1 , ... l Q are not arithmetic progressions.
  • P and the optimal set P * of P can be made to satisfy the following formula:
  • the physical meaning of formula 3 is to make The column correlation of is as small as possible, so the frequency domain positions included in P determined according to formula 3 are distributed at unequal intervals, thereby ensuring the downlink channel estimation accuracy of the terminal equipment.
  • the network device may indicate P through the first information.
  • the network device may send first information to the terminal device, where the first information may be used to indicate the time domain location and/or the frequency domain location of the downlink pilot signal.
  • the first information may be carried in a radio resource control (RRC) message, a media access control (MAC) control element (MAC-control element, MAC CE) or downlink control information (DCI) )middle.
  • RRC radio resource control
  • MAC-control element MAC-control element
  • DCI downlink control information
  • P is only related to T. Since the terminal device can obtain T, the network device does not need to deliver P to the user, and the terminal device can obtain P according to formula 3, that is, the terminal device can determine according to the second delay information. The frequency domain location of the downlink pilot signal.
  • the downlink pilot signal in order to reduce the computational complexity and prevent the frequency domain positions of the downlink pilot signals of each terminal device from being different (if they are different, other users cannot send data at these frequency domain positions), the downlink pilot signal can be sent downlink.
  • the frequency domain positions of the pilot signals may be uniformly arranged in the entire band, which can ensure that each user sends downlink pilot signals on the same frequency domain position (eg, subcarrier).
  • the method for determining the first delay information set is described below by taking a scenario where the terminal device receives the second delay information, and the second delay information includes T as an example.
  • the downlink pilot signal (such as CSI-RS) sent by the i-th transmitting port of the network device received by the j-th receiving port of the user is but It can be expressed as:
  • the terminal device When the terminal device obtains After that, it can be adjusted according to the magnitude of the Arrange the elements in descending order, and select the first N ij element positions as the strong path positions of the (i, j)th delay channel, then the first delay information set can be obtained, which can be expressed as
  • the value of N ij can be indicated by the network device in the downlink channel state information feedback configuration.
  • the terminal device may calculate and obtain the value of N ij according to the configuration information carried in the downlink channel state information feedback configuration by the network device.
  • the strong path position of each delay channel may be reported to the network device.
  • the terminal device may send the relative position of each element in the first delay information set in T to the network
  • the device implements the indication of the first delay information set. For example, if the terminal device finds that the strong path position of a certain delay channel is 8 (that is, one element in the first delay information set is 8), and 8 is the second element in T, the terminal device only needs to report to the network Device sends 2.
  • the feedback overhead can be reduced, i.e. the feedback overhead is reduced from reduced to where
  • Another advantage is that it can overcome the timing deviation of uplink and downlink. For example, due to timing problems, the strong path position 8 estimated by the terminal device should be position 7 from the side of the network device. At this time, if the terminal device feeds back position 8, it will cause performance loss. , but if the user feeds back the second number in T, the network device can still obtain correct time delay location information.
  • the network device may estimate the strong path gain and the weak path gain on the (i,j)th uplink channel according to the uplink pilot signal and the first set of delay information reported by the terminal device.
  • the strong path gain is, for example, the gain on the delay path whose energy reaches the set value, and/or may be the gain of the first N p delay paths with the largest energy.
  • the weak path gain is, for example, the gain on the delay path whose energy does not reach the set value, and/or may be the gain of other delay paths other than the first N p delay paths with the largest energy.
  • the network device may estimate the gain of the strong path on the uplink channel corresponding to the p-th first delay information according to the strong path position of the downlink channel corresponding to the p-th first delay information indicated by the first delay information.
  • the first delay information set includes P pieces of first delay information, and the pth first delay information in the P pieces of first delay information is related to a downlink channel between the network device and the terminal device , the downlink channel related to the p-th first delay information is the downlink channel between a sending port of the network device and a receiving port of the terminal device, for example, the i-th sending port of the network device to the Downlink channel between the jth receive port of the terminal device.
  • the p-th first delay information may indicate at least one of the number of strong paths, the position of the delay domain, or the gain of the downlink channel corresponding to the p-th first delay information.
  • the network device can estimate the position of these strong paths on the uplink channel according to the number of strong paths and/or the delay domain position of the downlink channel corresponding to the p-th first delay information and the uplink pilot signal gain on.
  • the strong path gain can be determined according to formula 6, for example, the strong path gain of the uplink channel between the ith transmitting port of the network device and the jth receiving port of the terminal device Satisfy:
  • the positions of other paths other than the position of the strong path indicated by the p-th first delay information are weak paths, and the network device can use the uplink pilot resources and Determines the weak path gain.
  • the uplink pilot signal Take the uplink pilot signal as SRS as an example, when the SRS signal-to-noise ratio is low (for example, ⁇ 0dB), the weak paths on each downlink channel are easily overwhelmed by noise. At this time, only the gain of the strong path is considered when estimating the uplink channel. , and setting the weak path gain to zero can effectively denoise and improve the channel estimation accuracy. However, when the SRS signal-to-noise ratio is high (>0dB), the weak path can be estimated correctly, and if the weak path is still set to zero at this time, the channel estimation accuracy will decrease. The network device should therefore decide when only strong paths should be estimated, and when both strong and weak paths should be estimated.
  • the network device only re-estimates the strong path position on each uplink channel according to the SRS received signal. And compare it with the N ij reported by the user. If N ij and If most of the elements are the same (for example, the threshold can be set to 90%), it is considered that the SRS has a high signal-to-noise ratio.
  • the network device may directly estimate the uplink signal-to-noise ratio to determine whether the SRS is in a high signal-to-noise ratio range.
  • the network device will eliminate its interference after estimating the strong path, that is, subtract it from equation (1).
  • the network device continues to estimate the weak path. Because Contains only weak paths and is still a sparse vector. Therefore, the estimation of weak paths can still be solved according to the compressed sensing algorithm, such as OMP.
  • the network device when the first delay information indicates the strong path gain, the network device can obtain the strong path gain according to the first delay information, and does not need to be re-determined.
  • the network equipment can also receive the strong path gain from the terminal equipment.
  • the strong path gain estimated by the network equipment itself may not be accurate. Therefore, the method of reporting the strong path gain by the terminal equipment can further improve the channel estimation. Accuracy.
  • the terminal device can feed back the strong path gain, so that the network device can still obtain some relatively accurate delays on each uplink channel.
  • feeding back the strong path gain at the same time will lead to higher feedback overhead, and only in some scenarios (such as the two scenarios mentioned above) can the gain be greater than the overhead.
  • the terminal device may carry the gain of the respective delay positions of the at least L paths among the N p paths in the first delay information set, or the gain of the respective delay positions of the at least L paths is performed according to n bits. quantized value.
  • the phase of the gain can be uniformly quantized by x bits within 0-2 ⁇ , and the amplitude of the gain can be uniformly quantized by y bits within a preset quantization range.
  • whether to carry a strong path gain, how many strong path gains to carry, and/or to perform quantization according to several bits in the first delay information set can be indicated by the network device to the terminal device through the downlink channel state information feedback configuration.
  • the network device may instruct the terminal device to feed back the first delay information set to the network device through the second information.
  • the second information may be carried in an RRC message, MAC CE or DCI, for example.
  • the second information is carried in the downlink channel state information feedback configuration, or in other words, the second information includes the downlink channel state information feedback configuration.
  • the network device may instruct the terminal device to receive the second delay information through the third information.
  • the third information can be carried in an RRC message, MAC CE or DCI, for example.
  • the third information may be the same as the second information, or the second information may be carried in the same message, signaling or information as the third information.
  • the terminal device when the terminal device does not receive the second delay information from the network device, it can estimate the position of the strong path on each downlink channel according to the received downlink pilot signal to obtain the first set of delay information. For example, if the terminal device does not receive the second delay information, it can directly perform the OMP solution on Equation 4 to obtain the positions of the Np elements with the largest energy, and determine the first delay information set.
  • the embodiment of the present application further provides another communication method, and the communication method can be implemented by the first communication device and the second communication device.
  • the first communication apparatus may include a terminal device or a component in the terminal device (such as a processor, a circuit, a chip or a chip system, etc.), and the terminal device here is, for example, the terminal device 101 shown in FIG. 1 .
  • the second communication apparatus may include a network device or a component in the network device (such as a processor, a circuit, a chip or a chip system, etc.), where the network device is, for example, the network device 102 shown in FIG. 1 .
  • the method may include the following steps:
  • the terminal device sends the uplink pilot signal of the first carrier unit to the network device.
  • the terminal device sends the uplink pilot signal to the network device through the first carrier unit.
  • the network device may send an uplink pilot signal configuration to the terminal device.
  • the uplink pilot signal configuration For the setting manner of the uplink pilot signal configuration, reference may be made to the description in the process shown in FIG. 4 , which will not be detailed here.
  • the uplink pilot signal here is sparse SRS.
  • the network device receives the uplink pilot signal from the terminal device.
  • the network device sends the downlink pilot signal of the second carrier unit to the Fth carrier unit to the terminal device, where F is a positive integer greater than or equal to 2.
  • the first carrier unit is one of the second carrier unit to the Fth carrier unit.
  • the network device sends the uplink pilot signal to the network device through the second carrier unit to the Fth carrier unit.
  • the terminal device receives downlink pilot signals from the second carrier unit to the Fth carrier unit of the network device.
  • the network device may send the downlink channel state information feedback configuration to the terminal device, so that the terminal device sends the downlink channel state information to the network device according to the feedback configuration.
  • the downlink channel state information feedback configuration For the setting of the downlink channel state information feedback configuration, reference may be made to the description in the process shown in FIG. 4 , which will not be detailed here.
  • S203 The terminal device determines third delay information according to the downlink pilot signal.
  • the third delay information is related to the downlink channel from the second carrier unit to the Fth carrier unit between the M transmit ports of the network device and the K receive ports of the terminal device.
  • the three delay information is used to indicate: the number R 1 of paths of the downlink channel, where R 1 is a positive integer; and/or the respective delay positions of the paths of the downlink channel R 1 .
  • the downlink channel state information feedback configuration can be used to configure the terminal device to report the third delay information to the network device.
  • the downlink channel state information feedback configuration carries the information used to instruct the terminal device to report the third delay information to the network device. Information.
  • the downlink channel state information feedback configuration may indicate R 1 .
  • S204 The terminal device sends the third delay information to the network device.
  • the network device receives the third delay information.
  • the terminal device may carry the third delay information in the downlink channel state information fed back to the network device.
  • the terminal device may carry the third delay information in the downlink channel state information fed back to the network device.
  • the downlink channel state information carries the first delay information set.
  • the terminal device may also send the third delay information to the network device by means other than the downlink channel state information.
  • the terminal device sends the third delay information to the network device through separate signaling other than the downlink channel state information.
  • the network device determines, according to the third delay information and the uplink pilot signal, the second carrier unit to the second carrier unit between the K' sending ports of the terminal device and the M' receiving ports of the network device Upstream channel of F carrier unit.
  • the network device can more accurately estimate the uplink channel on the second carrier element to the Fth carrier element according to the SRS on the first carrier element, wherein the first carrier element belongs to the second carrier element to the Fth carrier element. one to improve transmission performance.
  • the steps of the method shown in FIG. 6 above may also be shown in FIG. 7 .
  • the terminal equipment when the terminal equipment sends SRS through carrier element 2, and the network equipment sends CSI-RS through carrier element 1 to carrier element 3, the terminal equipment can estimate the corresponding delay channel in the range of carrier element 1 to carrier element 3.
  • the location of the strong path is determined, and the estimation result is reported to the network device, and the network device estimates the uplink channel of the terminal device according to the report result of the terminal device and the uplink pilot signal.
  • the terminal equipment received by the i- th receiving port of the network device The SRS signal of the jth transmit port satisfies:
  • h ij (F 1 ) represents the frequency domain channel between the i-th receiving port of the network device and the j-th sending port of the terminal device on the first carrier unit on the set of sub-carrier positions F 1 for sending SRS
  • a ( F 1 ) represents the DFT row extraction matrix, and the A(F 1 ) is obtained by row extraction of the DFT matrix according to the subcarrier position set F 1 for sending the SRS
  • n ij (F 1 ) represents the additive noise vector between the ith receiving port of the network device and the jth sending port of the terminal device.
  • the terminal device can use the OMP algorithm to solve S. After that, the terminal device indicates the estimated S to the network device through the third delay information.
  • S can be obtained.
  • the element in S is the respective time delays of R 1 paths of the downlink channel from the second carrier unit to the F th carrier unit between the M transmit ports of the network device and the K receive ports of the terminal device.
  • each carrier unit frequency domain channel corresponds to the same wideband delay channel
  • Equation 11 the relationship between the frequency domain channels h ij (F 1 ) and h ij (F 2 ) between the two carrier elements can be expressed as:
  • D S is a diagonal rotation matrix, which is uniquely determined by F 1 , F 2 and S.
  • F 1 , F 2 and S are diagonal rotation matrixs.
  • D S can satisfy:
  • ⁇ A(F 1 ,S)D S (A H (F 1 ,S)A(F 1 ,S)) -1
  • a H (F 1 ,S) only depends on F 1 , F 2 and S, where F 1 and F 2 are known to the network equipment, S is reported by the terminal equipment to the network equipment, once the network equipment estimates h ij (F 1 ) according to the SRS received on the first carrier unit , h ij (F 2 ) can be derived from h ij (F 2 ) ⁇ h ij (F 1 ).
  • the terminal device may determine the third delay information according to the uplink pilot signal and the downlink pilot signal.
  • the terminal device may determine R 2 time delay positions of the downlink channel according to the downlink pilot signals from the second carrier unit to the Fth carrier unit, where R 2 is a positive integer greater than or equal to R 1 , and transmit the first
  • the frequency domain resource position of the uplink pilot signal of the carrier unit selects R 1 delay positions from the R 2 delay positions of the downlink channel, and determines the third delay information according to the R 1 delay positions.
  • a possible approach is to first obtain the non-zero position set S 1 through algorithms such as OMP in formula ten, and the number of elements of S 1 is R 2 .
  • the number of elements included in the determined S is R 1 . wherein, R 1 ⁇ R 2 .
  • the above process illustrates the method for estimating the uplink channel in the process shown in FIG. 6 by taking the terminal equipment receiving the downlink pilot signal sent by the network equipment through the first carrier unit and the second carrier unit as an example. It should be understood that when the network equipment passes more carrier units When sending downlink pilot signals, the uplink channel can be estimated by a similar method. For example, the above formula 10 to formula 14 are appropriately extended to estimate the uplink channel. The specific expansion mode can be realized by those skilled in the art on the basis of the methods disclosed in the above implementation principles, and will not be repeated here.
  • the network device may instruct the terminal device to feed back the third delay information to the network device through the fourth information.
  • the third information can be carried in an RRC message, MAC CE or DCI, for example.
  • the fourth information is carried in the downlink channel state information feedback configuration, or in other words, the fourth information includes the downlink channel state information feedback configuration.
  • FIG. 8 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus is, for example, the terminal device 800 shown in FIG. 8 .
  • the terminal device 800 includes a processing module 810 and a transceiver module 820 .
  • the terminal device 800 may be a network device, or may be a chip applied in the terminal device or other combined devices or components having the functions of the above-mentioned terminal device.
  • the transceiver module 820 may be a transceiver, the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 810 may be a processor, such as a baseband processor, and the baseband processor may include one or more Central processing unit (central processing unit, CPU).
  • CPU Central processing unit
  • the transceiver module 820 may be a radio frequency unit, and the processing module 810 may be a processor, such as a baseband processor.
  • the transceiver module 820 may be an input/output interface of a chip (eg, a baseband chip), and the processing module 810 may be a processor of the chip system, which may include one or more central processing units.
  • the processing module 810 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 820 may be implemented by a transceiver or a circuit component related to the transceiver.
  • the processing module 810 may be configured to perform all operations performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 6 except for the transceiving operations, such as S103, and/or for supporting the techniques described herein. Other processes, such as generating messages, information, and/or signaling sent by the transceiving module 820, and processing messages, information, and/or signaling received by the transceiving module 820.
  • the transceiver module 820 may be used to perform all receiving and sending operations performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 6, such as S101, S102, S104, S201, S202, and S204, and/or used to support this document other procedures of the described techniques.
  • the transceiver module 820 may be a functional module, and the function module can perform both sending and receiving operations.
  • the transceiver module 820 may be used to perform the operations performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 6 . All sending operations and receiving operations.
  • the transceiver module 820 when performing a sending operation, can be considered as a sending module, and when performing a receiving operation, the transceiver module 820 can be considered as a receiving module; or, the transceiver module 820 can also be two Functional modules, the transceiver module 820 can be regarded as a general term for these two functional modules, these two functional modules are respectively a sending module and a receiving module, the sending module is used to complete the sending operation, for example, the sending module can be used to execute Figure 4 or Figure 6
  • the receiving module is used to complete the receiving operation.
  • the receiving module may be used to perform all the receiving operations performed by the terminal device in the embodiment of FIG. 4 or FIG. 6 .
  • the transceiver module 820 may be configured to send an uplink pilot signal to a network device, and receive a downlink pilot signal from the network device.
  • the processing module 810 may be configured to determine a first delay information set according to the downlink pilot signal, where the first delay information set includes P pieces of first delay information, and the pth of the P pieces of first delay information
  • the pieces of first delay information are related to a downlink channel between the network device and the terminal device, and the downlink channel related to the p-th first delay information is a sending port of the network device to a downlink channel between a receiving port of the terminal device;
  • the p-th first delay information is used to indicate at least one of the following: the path of the downlink channel corresponding to the p-th first delay information
  • the number N p of N p , N p is a positive integer; or, for the respective delay gains of L paths among the N p paths, L is a positive integer less than or equal to N p ;
  • the first set of delay information is carried through downlink channel state information.
  • the transceiver module 820 may also receive second delay information from the network device, where the second delay information is used to indicate that the K' sending ports of the terminal device are sent to the the number T of paths of uplink channels between the M' receiving ports of the network device, where T is a positive integer; and/or the K' transmitting ports of the terminal device and the M' receiving ports of the network device The respective time delay positions of the T paths of the upstream channel between ports. Then, the processing module 810 may determine the first delay information set based on the downlink pilot signal and the second delay information, so as to more efficiently determine the first delay information set.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, N p ⁇ T, and the The p pieces of first delay information are specifically used to indicate the indices of the delay positions of the N p paths in the delay positions of the T paths, so as to reduce overhead.
  • the transceiver module 820 may further receive first information from the network device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, wherein the downlink pilot signal
  • the frequency domain locations of the s are unequally spaced, which can further improve the estimation accuracy of the uplink channel.
  • the processing module 810 may be configured to determine the frequency domain position of the downlink pilot signal based on the second delay information.
  • the transceiver module 820 may also receive second information from the network device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second information is further used to instruct the terminal device to receive the second delay information.
  • the transceiver module 820 may send the uplink pilot signal of the first carrier unit to the network device, and receive the downlink pilot signal from the second carrier unit to the Fth carrier unit from the network device , where F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the Fth carrier frequency unit.
  • the processing module 810 may determine third delay information according to the downlink pilot signal, the third delay information and the distance between the M sending ports of the network device and the K receiving ports of the terminal device.
  • the downlink channel from the second carrier unit to the Fth carrier unit is related, and the third delay information is used to indicate: the number of paths R 1 of the downlink channel, R 1 is a positive integer; and/or, the The respective time delay positions of the downlink channel R 1 paths.
  • the transceiver module 820 may also send the third delay information to the network device.
  • the processing module 810 may determine the third delay information according to the uplink pilot signal and the downlink pilot signal.
  • the processing module 810 may determine R 2 delay positions of the downlink channel according to the downlink pilot signals from the second carrier unit to the Fth carrier unit, where R 2 is a positive value greater than or equal to R 1 integer; the processing module 810 can select R 1 delay position from the R 2 delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit; the processing module 810 can select R 1 delay position according to the R 1 delay position determines the third delay information.
  • the estimation accuracy can be further improved.
  • the third delay information is carried through downlink channel state information.
  • the transceiver module 820 may further receive fourth information from the network device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • FIG. 9 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the communication apparatus is, for example, the network device 900 .
  • the network device 900 may include a processing module 910 and a transceiver module 920 .
  • the network device 900 may be the network device described above, or may be a chip applied in the network device or other combined devices, components, etc. having the functions of the above-mentioned network device.
  • the transceiver module 920 may be a transceiver, and the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 910 may be a processor, and the processor may include one or more CPUs.
  • the transceiver module 920 may be a radio frequency unit, and the processing module 910 may be a processor, such as a baseband processor.
  • the transceiver module 920 may be an input/output interface of a chip (eg, a baseband chip), and the processing module 910 may be a processor of the chip system, which may include one or more central processing units.
  • the processing module 910 in this embodiment of the present application may be implemented by a processor or a circuit component related to the processor, and the transceiver module 920 may be implemented by a transceiver or a circuit component related to the transceiver.
  • the processing module 910 may be configured to perform all operations except the transceiving operation performed by the network device in the embodiment shown in FIG. 4 or FIG. 6, for example, performing S105, and for example, generating a message sent by the transceiving module 920, information and/or signaling, and/or processing messages, information, and/or signaling received by transceiving module 920, and/or other processes for supporting the techniques described herein.
  • the transceiver module 920 may be configured to perform all sending and/or receiving operations performed by the network device in the embodiment shown in FIG. 4 or FIG. 6 , such as S101, S102, S104, S201, S202, and S204, and/or for Additional processes supporting the techniques described herein.
  • the transceiver module 920 may be a functional module, and the function module can complete both the sending operation and the receiving operation.
  • the transceiver module 920 may be used to execute the network device in the embodiment shown in FIG. 4 or FIG. 6 . All sending operations and receiving operations.
  • the transceiver module 920 when performing a sending operation, can be considered as a sending module, and when performing a receiving operation, the transceiver module 920 can be considered as a receiving module; or, the transceiver module 920 can also be two Functional modules, the transceiver module 920 can be regarded as a general term for these two functional modules, these two functional modules are respectively a sending module and a receiving module, the sending module is used to complete the sending operation, for example, the sending module can be used to execute Figure 4 or Figure 6
  • the receiving module is used to complete the receiving operation.
  • the receiving module may be used to perform all the receiving operations performed by the network device in the embodiment shown in FIG. 4 or FIG. 6 . operate.
  • the transceiver module 920 may receive the uplink pilot signal from the terminal device, send the downlink pilot signal to the terminal device, and receive the first signal from the terminal device.
  • the first delay information set includes P pieces of first delay information, the p-th first delay information in the P pieces of first delay information and a downlink between the network device and the terminal device channel-related, the downlink channel related to the p-th first delay information is a downlink channel between a sending port of the network device and a receiving port of the terminal device, and the p-th first delay information
  • the delay information is used to indicate at least one of the following: the number N p of downlink channel paths corresponding to the p-th first delay information, where N p is a positive integer; or, L among the N p paths The delay gain of each path, L is a positive integer less than or equal to Np; or, the time delay positions of the Np paths of the downlink channel corresponding to the pth first
  • the first set of delay information is carried through downlink channel state information.
  • the transceiver module 920 may also send second delay information to the terminal device, where the second delay information is used to indicate that the K' sending ports of the terminal device communicate with the network
  • the number T of paths of uplink channels between M' receiving ports of the device, where T is a positive integer; and/or the number T of paths between the K' transmitting ports of the terminal device and the M' receiving ports of the network device The respective time delay positions of the T paths of the uplink channel.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, and N p ⁇ T.
  • the p-th first delay information is specifically used to indicate an index of the delay positions of the N p paths in the delay positions of the T paths.
  • the transceiver module 920 may also send first information to the terminal device, where the first information is used to indicate the frequency domain position of the downlink pilot signal, wherein the The frequency domain locations are unequally spaced.
  • the transceiver module 920 may also send second information to the terminal device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second signaling is further used to instruct the terminal device to receive the second delay information.
  • the transceiver module 920 may receive the uplink pilot signal from the first carrier unit of the terminal device, and send the downlink pilot signal from the second carrier unit to the Fth carrier unit to the terminal device signal, wherein F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the F-th carrier frequency unit.
  • the transceiver module 920 may also receive third delay information from the terminal device, the third delay information is determined according to the downlink pilot signal, and the third delay information is related to the M transmissions of the network device.
  • the downlink channel from the second carrier unit to the Fth carrier unit between the port and the K receiving ports of the terminal device is related, and the third delay information is used to indicate: the path length of the downlink channel The number R 1 , where R 1 is a positive integer; and/or the respective time delay positions of the downlink channels R 1 .
  • the processing module 910 may determine the second carrier unit between the K' transmit ports of the terminal device and the M' receive ports of the network device according to the third delay information and the uplink pilot signal to the uplink channel of the F-th carrier unit.
  • the third delay information is carried through downlink channel state information.
  • the transceiver module 920 may send fourth information to the terminal device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • An embodiment of the present application further provides a communication apparatus, where the communication apparatus may be a terminal device or a circuit.
  • the communication apparatus may be configured to perform the actions performed by the terminal device in the foregoing method embodiments.
  • FIG. 10 shows a schematic structural diagram of a simplified terminal device.
  • the terminal device takes a mobile phone as an example.
  • the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 10 only one memory and processor are shown in FIG. 10 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with the transceiver function may be regarded as the transceiver unit of the terminal device (the transceiver unit may be a functional unit, and the function unit can realize the sending function and the receiving function; alternatively, the transceiver unit may also be It includes two functional units, namely a receiving unit capable of realizing a receiving function and a transmitting unit capable of realizing a transmitting function), and a processor with a processing function is regarded as a processing unit of the terminal device. As shown in FIG. 10 , the terminal device includes a transceiver unit 1010 and a processing unit 1020 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1010 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1010 may be regarded as a transmitting unit, that is, the transceiver unit 1010 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 1010 is configured to perform the sending and receiving operations of the terminal device in the above method embodiments
  • processing unit 1020 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.
  • the processing unit 1020 may be configured to perform all operations performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 6 except for the transceiving operation, such as S103, and/or for Other processes supporting the techniques described herein, such as generating messages, information and/or signaling sent by transceiving unit 1010 and processing messages, information and/or signaling received by transceiving module 1020 .
  • the transceiver unit 1010 can be used to perform all receiving and sending operations performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 6, such as S101, S102, S104, S201, S202 and S204, and/or used to support this document other procedures of the described techniques.
  • the processing unit 1020 may perform actions similar to those performed by the processing module 810 , or in other words, the processing module 1020 includes the processing module 810 .
  • the transceiving unit 1010 can perform actions similar to those performed by the transceiving module 820 , or in other words, the transceiving unit 1010 includes the transceiving module 820 .
  • the device may include a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit and/or a communication interface;
  • the processing unit may be an integrated processor, a microprocessor or an integrated circuit.
  • the transceiver unit 1010 may be configured to send an uplink pilot signal to a network device, and receive a downlink pilot signal from the network device.
  • the processing unit 1020 may be configured to determine a first delay information set according to the downlink pilot signal, where the first delay information set includes P pieces of first delay information, and the pth of the P pieces of first delay information
  • the pieces of first delay information are related to a downlink channel between the network device and the terminal device, and the downlink channel related to the p-th first delay information is a sending port of the network device to a downlink channel between a receiving port of the terminal device;
  • the p-th first delay information is used to indicate at least one of the following: the path of the downlink channel corresponding to the p-th first delay information
  • the number N p of N p , N p is a positive integer; or, for the respective delay gains of L paths among the N p paths, L is a positive integer less than or equal to N p ;
  • the first set of delay information is carried through downlink channel state information.
  • the transceiver unit 1010 may also receive second delay information from the network device, where the second delay information is used to indicate that the K' sending ports of the terminal device are sent to the the number T of paths of uplink channels between the M' receiving ports of the network device, where T is a positive integer; and/or the K' transmitting ports of the terminal device and the M' receiving ports of the network device The respective time delay positions of the T paths of the upstream channel between ports. Then, the processing unit 1020 can determine the first delay information set based on the downlink pilot signal and the second delay information, so that the first delay information set can be determined more efficiently.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, N p ⁇ T, and the The p pieces of first delay information are specifically used to indicate the indices of the delay positions of the N p paths in the delay positions of the T paths, so as to reduce overhead.
  • the transceiver unit 1010 may further receive first information from the network device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, wherein the downlink pilot signal
  • the frequency domain locations of the s are unequally spaced, which can further improve the estimation accuracy of the uplink channel.
  • the processing unit 1020 may be configured to determine the frequency domain position of the downlink pilot signal based on the second delay information.
  • the transceiver unit 1010 may also receive second information from a network device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second information is further used to instruct the terminal device to receive the second delay information.
  • the transceiver unit 1010 may send the uplink pilot signal of the first carrier unit to the network device, and receive the downlink pilot signal from the second carrier unit to the Fth carrier unit from the network device , where F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the Fth carrier frequency unit.
  • the processing unit 1020 may determine third delay information according to the downlink pilot signal, the third delay information and the distance between the M sending ports of the network device and the K receiving ports of the terminal device.
  • the downlink channel from the second carrier unit to the Fth carrier unit is related, and the third delay information is used to indicate: the number of paths R 1 of the downlink channel, R 1 is a positive integer; and/or, the The respective time delay positions of the downlink channel R 1 paths.
  • the transceiver unit 1010 may also send the third delay information to the network device.
  • the processing unit 1020 may determine the third delay information according to the uplink pilot signal and the downlink pilot signal.
  • the processing unit 1020 may determine R 2 delay positions of the downlink channel according to the downlink pilot signals from the second carrier element to the Fth carrier element, where R 2 is a positive value greater than or equal to R 1 Integer; the processing unit 1020 can select R 1 delay positions from the R 2 delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit; the processing unit 1020 can select R 1 delay positions according to the R 1 delay position determines the third delay information.
  • R 2 is a positive value greater than or equal to R 1 Integer
  • the processing unit 1020 can select R 1 delay positions from the R 2 delay positions of the downlink channel according to the frequency domain resource position of the uplink pilot signal of the first carrier unit
  • the processing unit 1020 can select R 1 delay positions according to the R 1 delay position determines the third delay information.
  • the third delay information is carried through downlink channel state information.
  • the transceiver unit 1010 may further receive fourth information from the network device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • the apparatus 1100 includes one or more radio frequency units, such as a remote radio unit (RRU) 1110 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1120 .
  • RRU 1110 may be referred to as a transceiver module, and the transceiver module may include a sending module and a receiving module, or the transceiver module may be a module capable of transmitting and receiving functions.
  • the transceiving module may correspond to the transceiving module 920 in FIG. 9 , that is, the transceiving module may perform the actions performed by the transceiving module 920 .
  • the transceiver module may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1111 and a radio frequency unit 1112 .
  • the part of the RRU 1110 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending indication information to terminal equipment.
  • the part of the BBU 1110 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 1110 and the BBU 1120 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 1120 is the control center of the base station, and can also be called a processing module, which can correspond to the processing module 910 in FIG. 9 , and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc., Furthermore, actions performed by processing module 910 may be performed by a processing module.
  • the BBU processing module
  • the BBU may be used to control the base station to perform the operation flow of the network device in the above method embodiments, for example, to perform S302, or to generate at least one second configuration, the first configuration for the first configuration and the first configuration. first information or third information, etc.
  • the BBU 1120 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards. Radio access network (such as LTE network, 5G network or other network).
  • the BBU 1120 also includes a memory 1121 and a processor 1122.
  • the memory 1121 is used to store necessary instructions and data.
  • the processor 1122 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation flow of the network device in the foregoing method embodiments.
  • the memory 1121 and processor 1122 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • the BBU 1120 can be used to perform all operations except the transceiving operation performed by the network device in the embodiment shown in FIG. 4 or FIG. 6 , for example, performing S105, and for example, generating messages, information and information sent by the RRU 1110. and/or signaling, and/or processing messages, information, and/or signaling received by RRU 1110, and/or other processes for supporting the techniques described herein.
  • the RRU 1110 may be used to perform all transmit and/or receive operations performed by the network device in the embodiment shown in FIG. 4 or FIG. 6, such as S101, S102, S104, S201, S202, S204, and/or for supporting Other procedures for the techniques described herein.
  • the RRU 1110 may receive an uplink pilot signal from a terminal device, send a downlink pilot signal to the terminal device, and receive a first time signal from the terminal device.
  • the first delay information set includes P pieces of first delay information, the p-th first delay information in the P pieces of first delay information and a downlink between the network device and the terminal device channel-related, the downlink channel related to the p-th first delay information is a downlink channel between a sending port of the network device and a receiving port of the terminal device, and the p-th first delay information
  • the delay information is used to indicate at least one of the following: the number N p of downlink channel paths corresponding to the p-th first delay information, where N p is a positive integer; or, L among the N p paths
  • the delay gain of each path, L is a positive integer less than or equal to Np; or, the time delay positions of the Np paths of the downlink channel corresponding to the pth first delay information
  • the first set of delay information is carried through downlink channel state information.
  • the RRU 1110 may also send second delay information to the terminal device, where the second delay information is used to indicate that the K' sending ports of the terminal device communicate with the network device
  • the number T of paths of uplink channels between M' receiving ports, where T is a positive integer; and/or the number T of paths between the K' transmitting ports of the terminal device and the M' receiving ports of the network device The respective time delay positions of the T paths of the uplink channel.
  • the delay positions of the N p paths in the p th first delay information are a subset of the delay positions of the T paths, and N p ⁇ T.
  • the p-th first delay information is specifically used to indicate an index of the delay positions of the N p paths in the delay positions of the T paths.
  • the RRU 1110 may also send first information to the terminal device, where the first information is used to indicate the frequency domain location of the downlink pilot signal, wherein the frequency of the downlink pilot signal is Domain locations are unequally spaced.
  • the RRU 1110 may also send second information to the terminal device, where the second information is used to instruct the terminal device to send the first set of delay information.
  • the second signaling is further used to instruct the terminal device to receive the second delay information.
  • the RRU 1110 may receive the uplink pilot signal of the first carrier element from the terminal equipment, and send the downlink pilot signal of the second carrier element to the Fth carrier element to the terminal equipment , where F is a positive integer greater than or equal to 2, and the first carrier unit is one of the second carrier unit to the Fth carrier frequency unit.
  • the RRU 1110 may also receive third delay information from the terminal device, the third delay information is determined according to the downlink pilot signal, and the third delay information is related to the M transmission ports of the network device It is related to the downlink channel from the second carrier unit to the Fth carrier unit between the K receiving ports of the terminal device, and the third delay information is used to indicate: the number of paths of the downlink channel R 1 , R 1 is a positive integer; and/or the respective time delay positions of the downlink channels R 1 .
  • the BBU 1120 may determine, according to the third delay information and the uplink pilot signal, the second carrier unit to The uplink channel of the F-th carrier unit.
  • the third delay information is carried through downlink channel state information.
  • the RRU 1110 may send fourth information to the terminal device, where the fourth information is used to instruct the terminal device to send the third delay information to the network device.
  • Embodiments of the present application provide a communication system.
  • the communication system may include the terminal device involved in the embodiment shown in FIG. 1 and the network device involved in the embodiment shown in FIG. 1 .
  • the terminal device and the network device in the communication system may perform the communication method described in FIG. 4 or FIG. 6 .
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium.
  • the computer program When the computer program is executed by a computer, the computer can implement FIG. 4 or FIG. 6 provided by the foregoing method embodiments. Processes related to terminal equipment in the illustrated embodiment.
  • Embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a computer, the computer can implement FIG. 4 or FIG. 4 provided in the foregoing method embodiment. Processes related to network devices in the embodiment shown in 6.
  • Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 4 or FIG. 6 provided by the above method embodiments. Processes related to network devices in the embodiments.
  • Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 4 or FIG. 6 provided by the above method embodiments. Processes related to terminal equipment in the embodiment.
  • An embodiment of the present application further provides a chip or a chip system, where the chip may include a processor, and the processor may be configured to call a program or an instruction in a memory to execute the embodiment shown in FIG. 4 or FIG. 6 provided by the foregoing method embodiment Processes related to terminal equipment in .
  • the chip system may include the chip and other components such as memory or transceivers.
  • An embodiment of the present application further provides a chip or a chip system, where the chip may include a processor, and the processor may be configured to call a program or an instruction in a memory to execute the embodiment shown in FIG. 4 or FIG. 6 provided by the foregoing method embodiment Processes related to network devices in .
  • the chip system may include the chip and other components such as memory or transceivers.
  • processors mentioned in the embodiments of the present application may be a CPU, and may also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf processors Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • the computer-readable medium may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • universal serial bus flash disk universal serial bus flash disk
  • removable hard disk or other optical disk storage
  • disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

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Abstract

本申请提供一种通信方法及装置，使得终端设备发送上行导频信号，并由终端设备根据来自于网络设备的下行导频信号获得第一时延信息集合，以及，由网络设备在估计上行信道时考虑该第一时延信息集合和上行导频信号联合估计上行信道，其中，第一时延信息集合可指示强径的时延位置，能够提高上行信道估计的准确度。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2020年09月30日提交中国专利局、申请号为202011063776.X、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种通信方法及装置。
背景技术
时分双工(time division duplex，TDD)多输入多输出(multiple input and multiple output，MIMO)技术中，基站通过接收用户发送的探测参考信号(sounding reference signal，SRS)来估计上行信道信息，再利用TDD上下行信道互易性获取下行信道信息，进而设计对应的预编码进行下行数据传输。
目前，由于上行发射功率较低，干扰较大，SRS的信干噪比通常很低(<0分贝(dB))，上行信道估计的精度有待提高。
发明内容
本申请提供一种通信方法及装置，用以提高上行信道估计精度。
本申请实施例提供一种通信方法及装置，用于更加灵活地实现下行信道探测的去使能。
第一方面，提供一种通信方法。该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第一通信装置为终端设备，或者为设置在终端设备中的用于实现终端设备的功能的芯片，或者为用于实现终端设备的功能的其他部件。在下文的介绍过程中，以第一通信装置是终端设备为例进行说明。
该方法包括：终端设备向网络设备发送上行导频信号。终端设备接收来自于所述网络设备的下行导频信号，并根据所述下行导频信号确定第一时延信息集合，所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道；所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。终端设备还可向所述网络设备发送所述第一时延信息集合。可选的，该第一时延信息集合用于上行信道的估计。
采用该方法，可由终端设备发送上行导频信号，并由终端设备根据来自于网络设备的下行导频信号获得第一时延信息集合，网络设备在估计上行信道时考虑该第一时延信息集 合和上行导频信号联合估计上行信道，能够提高上行信道估计的准确度。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，终端设备可接收来自于所述网络设备的第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。则处理模块可基于所述下行导频信号以及所述第二时延信息，确定所述第一时延信息集合，因此更为高效地确定第一时延信息集合。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引，以降低开销。
在一种可能的设计中，所述终端设备接收来自所述网络设备的第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布，可进一步提高上行信道估计精度。
在一种可能的设计中，所述终端设备基于所述第二时延信息确定所述下行导频信号的频域位置。
在一种可能的设计中，所述终端设备可接收来自网络设备的第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信息还用于指示所述终端设备接收第二时延信息。
第二方面，提供一种通信方法。该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第二通信装置为网络设备(如基站)，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第二通信装置是网络设备为例进行说明。
该方法包括：网络设备接收来自于终端设备的上行导频信号。网络设备向所述终端设备发送下行导频信号，并接收来自于所述终端设备的第一时延信息集合。该第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道，所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。所述网络设备根据所述第一时延信息集合以及所述上行导频信号确定所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，所述网络设备向所述终端设备发送第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的T个径分别的时延位置。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T。所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
在一种可能的设计中，所述网络设备向所述终端设备发送第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
在一种可能的设计中，所述网络设备向所述终端设备发送第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信令还用于指示所述终端设备接收第二时延信息。
以上第二方面及其可能的设计所示方法的有益效果可参照第一方面及其可能的设计中的有益效果。
第三方面，提供一种通信方法。该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第一通信装置为终端设备，或者为设置在终端设备中的用于实现终端设备的功能的芯片，或者为用于实现终端设备的功能的其他部件。在下文的介绍过程中，以第一通信装置是终端设备为例进行说明。
该方法包括：终端设备向网络设备发送第一载波单元的上行导频信号。所述终端设备接收来自所述网络设备的第二载波单元至第F载频单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。所述终端设备根据所述下行导频信号确定第三时延信息，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。所述终端设备向所述网络设备发送所述第三时延信息。
采用以上方法，网络设备可根据第一载波单元上的SRS更加准确地估计第二载波单元至第F载波单元上的上行信道，其中，第一载波单元属于第二载波单元至第F载波单元中的一个，以提高传输性能。
在一种可能的设计中，所述终端设备可根据所述上行导频信号以及所述下行导频信号确定第三时延信息。
在一种可能的设计中，所述终端设备可根据第二载波单元至第F载波单元的下行导频信号确定所述下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数；所述终端设备根据发送第一载波单元的上行导频信号的频域资源位置从所述下行信道的R 2个时延位置中选取R 1个时延位置；所述终端设备根据所述R 1个时延位置确定第三时延信息。采用该设计，可进一步提高估计准确性。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，所述终端设备可接收来自所述网络设备的第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
第四方面，提供一种通信方法。该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片。示例性地，所述第二通信装置为网络设备(如基站)，或者为设置在网络设备中的用于实现网络设备的功能的芯片，或者为用于实现网络设备的功能的其他部件。在下文的介绍过程中，以第二通信装置是网络设备为例进行说明。
该方法包括：网络设备接收来自于终端设备的第一载波单元的上行导频信号。所述网络设备向所述终端设备发送第二载波单元至第F载波单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。所述网络设备接收来自所述终端设备的第三时延信息，所述第三时延信息根据所述下行导频信号确定，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。所述网络设备根据所述第三时延信息以及所述上行导频信号确定所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，所述网络设备向所述终端设备发送第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
以上第四方面及其可能的设计所示方法的有益效果可参照第三方面及其可能的设计中的有益效果。
第五方面，提供一种通信装置，例如该通信装置为如前所述的第一通信装置。所述第一通信装置用于执行上述第一方面、第三方面或其任一可能的实施方式中的方法。具体地，所述第一通信装置可以包括用于执行第一方面、第三方面或其任一可能的实施方式中的方法的模块，例如包括处理模块和收发模块。示例性地，收发模块可以包括发送模块和接收模块，发送模块和接收模块可以是不同的功能模块，或者也可以是同一个功能模块，但能够实现不同的功能。示例性地，所述第一通信装置为通信设备，或者为设置在通信设备中的芯片或其他部件。示例性地，所述通信设备为终端设备。下面以第一通信装置是终端设备为例。例如，所述收发模块可以通过收发器实现，所述处理模块可以通过处理器实现。或者，发送模块可以通过发送器实现，接收模块可以通过接收器实现，发送器和接收器可以是不同的功能模块，或者也可以是同一个功能模块，但能够实现不同的功能。如果第一通信装置为通信设备，收发器例如通过通信设备中的天线、馈线和编解码器等实现。或者，如果第一通信装置为设置在通信设备中的芯片，那么收发器(或，发送器和接收器)例如为芯片中的通信接口，该通信接口与通信设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。在第五方面的介绍过程中，继续以所述第一通信装置是终端设备，以及，以所述处理模块和所述收发模块为例进行介绍。
在执行以上第一方面所示方法时，收发模块可用于向网络设备发送上行导频信号，以及接收来自于所述网络设备的下行导频信号。处理模块可用于根据所述下行导频信号确定第一时延信息集合，所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端 设备的一个接收端口间的下行信道；所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。收发模块还可向所述网络设备发送所述第一时延信息集合。可选的，该第一时延信息集合用于上行信道的估计。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，收发模块还可接收来自于所述网络设备的第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。则处理模块可基于所述下行导频信号以及所述第二时延信息，确定所述第一时延信息集合，因此更为高效地确定第一时延信息集合。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引，以降低开销。
在一种可能的设计中，收发模块还可接收来自所述网络设备的第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布，可进一步提高上行信道估计精度。
在一种可能的设计中，处理模块可用于基于所述第二时延信息确定所述下行导频信号的频域位置。
在一种可能的设计中，收发模块还可接收来自网络设备的第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信息还用于指示所述终端设备接收第二时延信息。
在执行以上第一方面所示方法时，该通信装置的有益效果可参照第一方面及其可能的设计中的有益效果。
在执行以上第三方面所示方法时，收发模块可向网络设备发送第一载波单元的上行导频信号，并接收来自所述网络设备的第二载波单元至第F载频单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。处理模块可根据所述下行导频信号确定第三时延信息，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。收发模块还可向所述网络设备发送所述第三时延信息。
在一种可能的设计中，处理模块可根据所述上行导频信号以及所述下行导频信号确定第三时延信息。
在一种可能的设计中，处理模块可根据第二载波单元至第F载波单元的下行导频信号确定所述下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数；处理模块可根据发送 第一载波单元的上行导频信号的频域资源位置从所述下行信道的R 2个时延位置中选取R 1个时延位置；处理模块可根据所述R 1个时延位置确定第三时延信息。采用该设计，可进一步提高估计准确性。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，收发模块还可接收来自所述网络设备的第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
在执行以上第三方面所示方法时，该通信装置的有益效果可参照第三方面及其可能的设计中的有益效果。
第六方面，提供一种通信装置，例如该通信装置为如前所述的第二通信装置。所述第二通信装置用于执行上述第二方面、第四方面或其任一可能的实施方式中的方法。具体地，所述第二通信装置可以包括用于执行第二方面、第四方面或其任一可能的实施方式中的方法的模块，例如包括处理模块和收发模块。示例性地，收发模块可以包括发送模块和接收模块，发送模块和接收模块可以是不同的功能模块，或者也可以是同一个功能模块，但能够实现不同的功能。示例性地，所述第二通信装置为通信设备，或者为设置在通信设备中的芯片或其他部件。示例性地，所述通信设备为网络设备。下面以第二通信装置是网络设备为例，例如该网络设备为所述的网络设备。例如，所述收发模块也可以通过收发器实现，所述处理模块也可以通过处理器实现。或者，发送模块可以通过发送器实现，接收模块可以通过接收器实现，发送器和接收器可以是不同的功能模块，或者也可以是同一个功能模块，但能够实现不同的功能。如果第二通信装置为通信设备，收发器例如通过通信设备中的天线、馈线和编解码器等实现。或者，如果第二通信装置为设置在通信设备中的芯片，那么收发器(或，发送器和接收器)例如为芯片中的通信接口，该通信接口与通信设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。在第六方面的介绍过程中，继续以所述第二通信装置是网络设备，以及，以所述处理模块和所述收发模块为例进行介绍。
其中，在执行上述第二方面所示方法时，收发模块可接收来自于终端设备的上行导频信号，并向所述终端设备发送下行导频信号，以及接收来自于所述终端设备的第一时延信息集合。该第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道，所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。处理模块可根据所述第一时延信息集合以及所述上行导频信号确定所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，收发模块还可向所述终端设备发送第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上 行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的T个径分别的时延位置。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T。所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
在一种可能的设计中，收发模块还可向所述终端设备发送第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
在一种可能的设计中，收发模块还可向所述终端设备发送第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信令还用于指示所述终端设备接收第二时延信息。
在执行以上第二方面所示方法时，该通信装置的有益效果可参照第二方面及其可能的设计中的有益效果。
在执行以上第四方面所示方法时，收发模块可接收来自于终端设备的第一载波单元的上行导频信号，并向所述终端设备发送第二载波单元至第F载波单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。收发模块还可接收来自所述终端设备的第三时延信息，所述第三时延信息根据所述下行导频信号确定，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。处理模块可根据所述第三时延信息以及所述上行导频信号确定所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，收发模块可向所述终端设备发送第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
在执行以上第四方面所示方法时，该通信装置的有益效果可参照第四方面及其可能的设计中的有益效果。
第七方面，提供一种通信系统，该通信系统包括第五方面所述的通信装置或第六方面所述的通信装置。
第八方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机指令，当所述计算机指令在计算机上运行时，使得所述计算机执行上述第一方面至第四方面或其任意一种可能的实施方式中所述的方法。
第九方面，提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机指令，当所述计算机指令在计算机上运行时，使得所述计算机执行上述第一方面至第四方面或其任意一种可能的实施方式中所述的方法。
第十方面，提供一种包含指令的计算机程序产品，所述计算机程序产品用于存储计算机指令，当所述计算机指令在计算机上运行时，使得所述计算机执行上述第一方面至第四方面或其任意一种可能的实施方式中所述的方法。
附图说明
图1为本申请实施例提供的一种通信系统的架构示意图；
图2为本申请实施例提供的一种SRS的频域资源的示意图；
图3为本申请实施例提供的一种SRS信号表达方式的示意图；
图4为本申请实施例提供的一种通信方法的流程示意图；
图5为本申请实施例提供的一种时延域SRS信道示意图；
图6为本申请实施例提供的另一种通信方法的流程示意图；
图7为本申请实施例提供的另一种通信方法的逻辑示意图；
图8为本申请实施例提供的一种通信装置的结构示意图；
图9为本申请实施例提供的另一种通信装置的结构示意图；
图10为本申请实施例提供的另一种通信装置的结构示意图；
图11为本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
为了提高上行信道估计精度，本申请提供一种通信方法。下面将结合附图对本申请作进一步地详细描述。应理解，下面所介绍的方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
如图1所示，本申请实施例提供的测量反馈方法可应用于无线通信系统，该无线通信系统可以包括终端设备101以及网络设备102。
应理解，以上无线通信系统既可适用于低频场景(sub 6G)，也可适用于高频场景(above6G)。无线通信系统的应用场景包括但不限于第五代系统、新无线(new radio，NR)通信系统或未来的演进的公共陆地移动网络(public land mobile network，PLMN)系统等。
以上所示终端设备101可以是用户设备(user equipment，UE)、终端(terminal)、接入终端、终端单元、终端站、移动台(mobile station，MS)、远方站、远程终端、移动终端(mobile terminal)、无线通信设备、终端代理或终端设备等。该终端设备101可具备无线收发功能，其能够与一个或多个通信系统的一个或多个网络设备进行通信(如无线通信)，并接受网络设备提供的网络服务，这里的网络设备包括但不限于图示网络设备102。
其中，终端设备101可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端装置或者未来演进的PLMN网络中的终端装置等。
另外，终端设备101可以部署在陆地上，包括室内或室外、手持或车载；终端设备101也可以部署在水面上(如轮船等)；终端设备101还可以部署在空中(例如飞机、气球和卫星上等)。该终端设备101具体可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭 (smart home)中的无线终端等。终端设备101也可以是具有通信模块的通信芯片，也可以是具有通信功能的车辆，或者车载设备(如车载通信装置，车载通信芯片)等。
网络设备102可以是接入网设备(或称接入网站点)。其中，接入网设备是指有提供网络接入功能的设备，如无线接入网(radio access network，RAN)基站等等。网络设备102具体可包括基站(base station，BS)，或包括基站以及用于控制基站的无线资源管理设备等。该网络设备101还可包括中继站(中继设备)、接入点以及未来5G网络中的基站、未来演进的PLMN网络中的基站或者NR基站等。网络设备102可以是可穿戴设备或车载设备。网络设备102也可以是具有通信模块的芯片。
比如，网络设备102包括但不限于：5G中的下一代基站(g nodeB，gNB)、LTE系统中的演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、CRAN系统下的无线控制器、基站控制器(base station controller，BSC)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)或移动交换中心等。网络设备101还可包括未来6G或更新的移动通信系统中的基站。
下面以图1所示的系统为例，说明现有技术中信道探测的方式。其中，信道探测方式可包括依据上行导频信号(或称上行探测参考信号)进行的上行信道探测，和依据下行导频信号(或称下行探测参考信号)进行的下行信道探测。
典型的下行信道探测基于下行信道状态信息参考信号(channel state information reference signal，CSI-RS)进行，即由终端设备101根据网络设备102发的CSI资源配置对网络设备102发送的CSI-RS信号进行测量，以获得下行信道特征，并由终端设备101根据网络设备102发送的CSI上报配置向网络设备102上报下行信道特征。
上行信道探测一般是基于上行探测参考信息(sounding reference signal，SRS)进行的，即由网络设备102向终端设备101发送SRS配置，由终端设备101根据SRS配置发送SRS，并由网络设备102对终端设备101发送的SRS进行测量，以获得上行信道特征。
示例性的，基于图1所示通信系统，可实现基于稀疏SRS的TDD MIMO通信。
稀疏SRS技术的本质思想是通过SRS图案(pattern)以及序列设计，使能不同用户(也就是不同的终端设备)的信道在时延域正交，例如图2所示，UE1和UE2分别的信道在时延域正交，因此在频域上占用相同的频域资源，从而可在相同的SRS开销下复用更多终端设备。网络设备在接收到稀疏SRS之后，会先估计各个终端设备叠加的等效时延域信道，之后再通过时延搬移，恢复各个终端设备的信道，具体恢复各个终端设备的信道的方式可以参照现有技术中的说明。
目前已有的稀疏SRS信道估计方案利用了频域信道在时延域的稀疏性(即少量时延抽头包含了信道的大部分能量)。假设网络设备第i个端口接收到的终端设备第j个端口的SRS信号为y ij，则其可以表示为：
Figure PCTCN2021119116-appb-000001
其中，h ij表示网络设备第i个接收端口与终端设备第j个发送端口间在发送SRS的子载波上的频域信道，A表示离散傅里叶变换(discrete fourier transform，DFT)行抽取矩阵，该DFT行抽取矩阵按照发送SRS的子载波位置对DFT矩阵进行行抽取获得，
Figure PCTCN2021119116-appb-000002
表示网络设备第i个端口与终端设备第j个发送端口间的时延域信道，n ij表示网络设备的第i个接 收端口接收到的终端设备的第j个发送端口间的加性噪声向量。
如图3所示，可以看出，从接收的SRS信号y ij中估计时延域信道
Figure PCTCN2021119116-appb-000003
的问题等价为稀疏信号重构问题，可以采用经典的压缩感知算法进行求解，如正交匹配追踪(orthogonal matching pursuit，OMP)算法等。
然而，随着复用终端设备的数量的增加，等效时延域信道中需估计的时延径(或简称为径)数会成倍增加，这会导致上行信道估计精度的下降，其中，一个时延径对应于时延信道向量中的一个元素。另一方面，由于上行发射功率较低，干扰较大，SRS的信噪比通常很低(<0分贝(dB))，时延径也难以被准确估计，这也会严重影响上行信道估计的精度。因此可以看出，若想充分获得稀疏SRS高复用能力带来的增益，须先解决上行信道估计精度低这一瓶颈问题。
为了提高上行信道估计精度，本申请实施例提供一种通信方法。该通信方法可由第一通信装置和第二通信装置实施。其中，第一通信装置可包括终端设备或终端设备中的部件(比如处理器、电路、芯片或芯片系统等)，这里的终端设备例如图1所示的终端设备101。第二通信装置可包括网络设备或网络设备中的部件(比如处理器、电路、芯片或芯片系统等)，这里的网络设备例如图1所示的网络设备102。
如图4所示，该方法可包括以下步骤：
S101：终端设备向网络设备发送上行导频信号，例如，终端设备发送SRS。
可选的，在S101之前，网络设备可向终端设备发送上行导频信号配置(或称上行导频信号的配置信息)。以上行导频信号是SRS为例，上行导频信号配置可包括SRS的资源集，SRS的资源集用于终端设备发送SRS。
可选的，这里的上行导频信号为稀疏SRS。
相应地，网络设备接收来自于终端设备的上行导频信号。
S102：网络设备向终端设备发送下行导频信号，例如，网络设备向终端设备发送CSI-RS。
相应地，终端设备接收来自于网络设备的下行导频信号。
可选的，在S102之前，网络设备可向终端设备发送下行信道状态信息反馈配置(或称下行信道状态信息反馈的配置信息)，用于终端设备根据该反馈配置向网络设备发送下行信道状态信息，其中，终端设备根据下行导频信号获得下行信道状态信息，比如，下行导频信号为CSI-RS，则下行信道状态信息可包括CSI。
以下行信道状态信息是CSI为例，CSI反馈配置可用于配置CSI反馈的内容，比如，配置终端设备反馈信道质量指示符(channel quality indicator，CQI)和/或秩指示符(rank indicator，RI)等，则终端设备可根据CSI反馈的内容向网络设备发送CQI和/或RI。
可选的，下行信道状态信息反馈配置可用于配置终端设备向网络设备上报第一时延信息集合，比如，在下行信道状态信息反馈配置中携带用于指示终端设备向网络设备上报第一时延信息集合的信息。
S103：终端设备根据下行导频信号确定第一时延信息集合。
其中，该第一时延信息集合包括P个第一时延信息，该P个第一时延信息中的第p个第一时延信息与该网络设备和该终端设备之间的一个下行信道有关，与该第p个第一时延信息有关的下行信道为该网络设备的一个发送端口(或称发射端口)到该终端设备的一个接收端口之间的下行信道，比如为该网络设备的第i个发送端口到该终端设备的第j个接收端口之间的下行信道。
可选的，其中P为小于或等于M×K的正整数，p＝1、2……P，M表示该网络设备的发送端口数，K表示所述终端设备的接收端口数，i＝1、2……M，j＝1、2……K。此外，P的取值也可以设置为其他值，比如设置为常数。P的取值可通过预配置方式确定，或者由网络设备指示(比如通过下行信道状态信息反馈配置指示)。
示例性的，该第p个第一时延信息可用于指示以下中的至少一个：
与该第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，
与该第p个第一时延信息对应的下行信道的N p个径分别的时延位置；或者，
与该第p个第一时延信息对应的下行信道的N p个径中至少L个径分别的时延位置的增益，L为小于等于N p的正整数。
应理解，第p个第一时延信息可用于指示根据下行导频信号确定的第p个第一时延信息对应的下行信道的N p个能量最强的时延径。
此外，当与该第p个第一时延信息有关的下行信道为网络设备的第i个发送端口到该终端设备的第j个接收端口之间的下行信道，则N p可表示为N ij。
S104：终端设备向网络设备发送第一时延信息集合。
相应地，网络设备接收第一时延信息集合。
其中，终端设备可根据下行信道状态信息反馈配置确定并向网络设备发送第一时延信息集合，或者由网络设备通过下行信道状态信息反馈配置以外的其他信息指示终端设备确定并向网络设备发送第一时延信息集合，或者可有终端设备根据预配置确定并向网络设备发送第一时延信息集合。
可选的，终端设备可在向网络设备反馈的下行信道状态信息中携带第一时延信息集合。例如。当下行导频信号为CSI-RS时，终端设备可在CSI报告中携带第一时延信息集合。其中，CSI报告可用于反馈下行信道信息，比如，用于携带CSI反馈的内容。示例性的，若下行信道状态信息反馈配置指示终端设备发送该第一时延信息集合，则终端设备可在下行CSI中携带第一时延信息集合。
此外，终端设备也可通过下行信道状态信息以外的方式向网络设备发送第一时延信息集合。比如，终端设备通过下行信道状态信息以外的单独信令向网络设备发送第一时延信息集合。
S105：网络设备根据第一时延信息集合以及上行导频信号确定终端设备的K’个发送端口与网络设备的M’个接收端口之间的上行信道。
采用以上方法，可由终端设备发送上行导频信号，并由终端设备根据来自于网络设备的下行导频信号获得第一时延信息集合，网络设备在估计上行信道时考虑该第一时延信息集合和上行导频信号联合估计上行信道。由于下行发射功率高于上行发送功率，终端设备一般能够更为准确地获得下行信道信息，此时对于TDD系统等具备上下行信道互易性的系统，网络设备可根据下行信道估计获得的第一时延信息集合和上行导频信号进行联合上行信道估计，因此能够提高上行信道估计的准确度。
可选的，若上行导频信号包括稀疏SRS，则可在不增加SRS开销的情况下获得更为准确的上行信道估计结果，提高基于稀疏SRS的信道估计的精确度。
在S103的实施中，终端设备可接收来自于网络设备的第二时延信息，并根据第二时延信息以及下行导频信号确定第一时延信息集合。该第二时延信息可指示终端设备的K’ 个发送端口与网络设备M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或，第二时延信息可指示终端设备的K’个发送端口与网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。
可选的，第一时延信息集合中，第p个第一时延信息中的N p个径的时延位置为第二时延信息的T个径分别的时延位置组成的集合的子集，N p≤T。此外，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
示例性的，网络设备可根据S101中的上行导频信号确定第二时延信息。
下面结合图5，以上行导频信号为SRS为例，对网络设备确定第二时延信息的方式进行说明。
假设网络设备的第i个接收端口接收到的终端设备的第j个发送端口的SRS信号为y ij，y ij满足前述公式一。
其中h ij表示网络设备第i个接收端口与终端设备第j个发送端口间在发送SRS的子载波上的频域信道，A表示DFT行抽取矩阵，该DFT行抽取矩阵按照发送SRS的子载波位置对DFT矩阵进行行抽取获得，
Figure PCTCN2021119116-appb-000004
表示网络设备的第i个接收端口与终端设备第j个发送端口间的时延域信道，n ij表示网络设备第i个接收端口与终端设备第j个发送端口间的加性噪声向量。
基于以上假设，
Figure PCTCN2021119116-appb-000005
表示第(i,j)个收发端口之间的时延信道(或称上行时延信道)，即网络设备的第i个接收端口与终端设备第j个发送端口间的上行信道。从图5中可以看出，各个收发端口之间的信道具有十分接近的时延径位置，但径能量差异较大。如果单独估计每个收发端口之间的信道的时延径，一些能量较低的径很容易被噪声淹没，无法准确估计，比如图5中第二收发端口信道的第k径。但是由于第一收发端口信道的第k径能量较大，如果将第一收发端口信道和第二收发端口信道联合在一起，则第k径仍可被准确估计。
基于上述思想，可以将所有时延信道联合在一起估计时延位置集合，以克服噪声影响。具体而言，我们可以将式(1)重新表示为：
Figure PCTCN2021119116-appb-000006
其中，M'表示网络设备的接收端口总数，K'表示终端设备的发送端口总数，N表示加性噪声矩阵，
Figure PCTCN2021119116-appb-000007
均为稀疏的时延信道，且时延径位置均相同，即
Figure PCTCN2021119116-appb-000008
S(·)为时延位置提取函数。我们称T为各个时延信道共享的时延位置集合，则从已知的Y中估计T的问题等价为经典的多观测矢量(multiple measurement vector)问题，可以采用经典的同步OMP(simultaneous OMP，SOMP)等算法进行求解T。
此后，网络设备可向终端设备发送第二时延信息，该第二时延信息可指示T。示例性的，第二时延信息可指示T中包含的元素数量T，即指示终端设备的K’个发送端口与网络设备M’个接收端口之间的上行信道的径的个数；和/或，第二时延信息可指示T中包含的T个元素即终端设备的K’个发送端口与网络设备M’个接收端口之间的上行信道的T个径分别的时延位置。
另外可能的方式中，可以将公式二所示的Y与A H相乘，然后求相乘后矩阵A HY能量最大的若干行，获得T，A H表示A的转置矩阵。
另外公式二是系统模型公式，有很多等价变换，不应理解为该公式作为确定Y的表达式的唯一方式，比如可以将Y、
Figure PCTCN2021119116-appb-000009
或者N等全部由矩阵转化为向量等。
可选的，第二时延信息可包括T中的全部T个元素，或者说，第二时延信息可包括T。
可选的，若系统的循环前缀(cycle prefix，CP)长度为N CP，则可以假设时延位置集合T中的所有元素均小于N CP，网络设备可在发送T中的全部元素时，仅需要按照
Figure PCTCN2021119116-appb-000010
比特(bit)进行量化，其中
Figure PCTCN2021119116-appb-000011
为上取整函数。
在一种可能的实现方式中，若第二时延信息包括T，则网络设备在发送下行导频信号(如CSI-RS)时，第i个发送端口(1≤i≤M)仅需要在Q≥|T|个子载波上发送下行导频信号，其中，|T|表示T中元素总个数，因此相比于现有每个资源块都要发送下行导频信号的方式，可以极大降低发送下行导频信号的开销。Q为P中频域位置的数量，或称P中元素数量，可表示为|Ρ|。
可选的，假设集合P为发送下行导频信号的频域位置(或称子载波位置)集合。其中，下行导频信号的频域位置可成非等间隔分布。非等间隔分布是指，集合P包括的全部导频信号占用的子载波非均匀分布，比如，集合P包括的全部导频信号占用的子载波编号分别为l 0、l 1、……l Q，则l 0、l 1、……l Q非成等差数列。
示例性的，可令P以及P的最优集合P *满足以下公式：
Figure PCTCN2021119116-appb-000012
其中
Figure PCTCN2021119116-appb-000013
表示按照位置集合P和T分别抽取DFT矩阵的行和列组成的子矩阵，
Figure PCTCN2021119116-appb-000014
表示矩阵X的弗比尼斯(Frobenius)范数，即X的每个元素的平方和。公式三的物理含义是使得
Figure PCTCN2021119116-appb-000015
的列相关性尽可能的小，因此根据公式三确定的P所包括的频域位置成非等间隔分布，从而保证终端设备的下行信道估计精度。
可选的，网络设备可通过第一信息指示P。可选的，在S102之前，网络设备可向终端设备发送第一信息，第一信息可用于指示下行导频信号的时域位置和/或频域位置。该第一信息可承载于无线资源控制(radio resource control，RRC)消息、媒体访问控制(media access control，MAC)控制元素(MAC-control element，MAC CE)或下行控制信息(downlink control information，DCI)中。
此外，根据公式三可知，P仅与T有关，由于终端设备可以获得T，因此网络设备无需将P下发用户，可由终端设备根据公式三获得P，即终端设备可根据第二时延信息确定下行导频信号的频域位置。
在另外的实现方式中，为了降低计算复杂度，并避免各个终端设备的下行导频信号的频域位置不同(若不同，则其他用户在这些频域位置上无法发送数据)，可以将发送下行导频信号的频域位置在全带内均匀排列即可，可以保证各个用户在相同的频域位置(如子载波)上发送下行导频信号。
下面以终端设备接收到第二时延信息，且第二时延信息包括T的场景为例，说明第一时延信息集合的确定方式。
假设用户第j个接收端口接收到的网络设备第i个发送端口所发送的下行导频信号(例如CSI-RS)为
Figure PCTCN2021119116-appb-000016
则
Figure PCTCN2021119116-appb-000017
可以表示为：
Figure PCTCN2021119116-appb-000018
其中，
Figure PCTCN2021119116-appb-000019
表示网络设备第i个发送端口与用户第j个接收端口间在发送下行导频信号的子载波上的频域信道，
Figure PCTCN2021119116-appb-000020
表示DFT行抽取矩阵，该DFT行抽取矩阵按照发送下行导频信号的子载波位置对DFT矩阵进行行抽取获得。
Figure PCTCN2021119116-appb-000021
表示网络设备第i个发送端口与终端设备第j个接收端口间的时延域信道。
当
Figure PCTCN2021119116-appb-000022
为稀疏向量，且终端设备可获得T时，则公式四可以近似为：
Figure PCTCN2021119116-appb-000023
其中
Figure PCTCN2021119116-appb-000024
表示按照T抽取
Figure PCTCN2021119116-appb-000025
的列，
Figure PCTCN2021119116-appb-000026
表示按照T抽取
Figure PCTCN2021119116-appb-000027
的元素。当网络设备每个发送端口在Q≥|T|个子载波上发送CSI-RS时，已知
Figure PCTCN2021119116-appb-000028
估计
Figure PCTCN2021119116-appb-000029
等价为经典的最小二乘问题，其解满足：
Figure PCTCN2021119116-appb-000030
其中，等效噪声为
Figure PCTCN2021119116-appb-000031
能量为
Figure PCTCN2021119116-appb-000032
如果下行导频信号的子载波集合满足公式三，则
Figure PCTCN2021119116-appb-000033
满足：
Figure PCTCN2021119116-appb-000034
其中，由于
Figure PCTCN2021119116-appb-000035
接近单位阵，因此等效噪声的能量最小，下行信道估计精度最高，也就是说，当下行导频信号的子载波集合满足公式三时，等效噪声的能量最小，下行信道估计精度最高。
当终端设备获得
Figure PCTCN2021119116-appb-000036
后，可按照幅值大小对
Figure PCTCN2021119116-appb-000037
中元素进行降序排列，并选择前N ij个元素位置作为第(i,j)个时延信道的强径位置，即可获得第一时延信息集合，该集合可表示为
Figure PCTCN2021119116-appb-000038
示例性的，N ij的取值可由网络设备在下行信道状态信息反馈配置指示。比如，终端设备可根据网络设备在下行信道状态信息反馈配置中携带的配置信息计算获得N ij的取值。
在S104中，在终端设备向网络设备发送第一时延信息集合时，可将每个时延信道的强径位置上报至网络设备。
此外，在终端设备接收到来自于网络设备的第二时延信息且第二时延信息包括T时，终端设备可将第一时延信息集合中每个元素在T中的相对位置发送至网络设备，实现第一时延信息集合的指示。比如，终端设备发现某一个时延信道的强径位置为8(即第一时延信息集合中的一个元素为8)，而8在T中是第2个元素，则终端设备仅需向网络设备发送2。
这样做的一个好处是可以降低反馈开销，即将反馈开销从
Figure PCTCN2021119116-appb-000039
降为
Figure PCTCN2021119116-appb-000040
其中|T|＜＜N CP。另外一个好处是可以克服上下行的定时偏差，比如，由于定时问题，终端设备估计的强径位置8在网络设备侧看来应该是位置7，此时如果终端设备反馈位置8则会造成性能损失，但如果用户反馈的是T中的第二个数，则网络设备仍可获得正确的时延位置信息。
在S105的实施中，网络设备可根据上行导频信号以及终端设备上报的第一时延信息 集合估计第(i,j)个上行信道上的强径增益和弱径增益。强径增益比如是能量达到设定值的时延径上的增益，和/或，可以是能量最大的前N p个时延径的增益。弱径增益比如是能量未达到设定值的时延径上的增益，和/或，可以是能量最大的前N p个时延径以外的其他时延径的增益。
具体来说，网络设备可根据第一时延信息指示的第p个第一时延信息对应的下行信道的强径位置估计第p个第一时延信息对应的上行信道上强径的增益。如前述，第一时延信息集合包括P个第一时延信息，该P个第一时延信息中的第p个第一时延信息与网络设备和该终端设备之间的一个下行信道有关，与该第p个第一时延信息有关的下行信道为该网络设备的一个发送端口到该终端设备的一个接收端口之间的下行信道，比如为该网络设备的第i个发送端口到该终端设备的第j个接收端口之间的下行信道。也就是说，第p个第一时延信息可指示第p个第一时延信息对应的下行信道的强径数量、时延域位置或者增益中的至少一项。此外，由于上下行信道互易行，网络设备可根据第p个第一时延信息对应的下行信道的强径数量和/或时延域位置和上行导频信号估计上行信道上这些强径位置上的增益。
示例性的，可根据公式六确定强径增益，比如，网络设备的第i个发送端口到该终端设备的第j个接收端口之间的上行信道强径增益
Figure PCTCN2021119116-appb-000041
满足：
Figure PCTCN2021119116-appb-000042
此外，第p个第一时延信息指示的强径位置以外的其他径的位置为弱径，网络设备可根据上行导频资源和
Figure PCTCN2021119116-appb-000043
确定弱径增益。
以上行导频信号为SRS为例，在SRS信噪比较低时(比如<0dB)，每个下行信道上的弱径很容易被噪声淹没，此时在估计上行信道时仅考虑强径增益，而将弱径增益置零则可以有效去噪，提升信道估计精度。然而，当SRS信噪比较高时(>0dB)，弱径本可被正确估计，此时若仍将弱径置零则会导致信道估计精度下降。因此网络设备应该判决在何时应该仅估计强径，在何时应该同时估计强径和弱径。
为实现上述目的，一种可行的方式是网络设备仅根据SRS接收信号重新估计每个上行信道上的强径位置
Figure PCTCN2021119116-appb-000044
并和用户上报的N ij进行比对。若N ij与
Figure PCTCN2021119116-appb-000045
大部分元素相同(比如可设门限90％)，则认为SRS信噪比较高。或者，网络设备可以直接估计上行信噪比，以确定SRS是否处于高信噪比区间。
若判决应同时估计强径和弱径，则此时网络设备在估计完强径之后，会消除其干扰，即在式(1)中减去
Figure PCTCN2021119116-appb-000046
获得：
Figure PCTCN2021119116-appb-000047
之后网络设备再继续估计弱径。由于
Figure PCTCN2021119116-appb-000048
仅包含弱径，且仍为稀疏向量。因此，弱径的估计仍可以按照压缩感知算法，比如OMP进行求解。
此外，在S105的实施中，当第一时延信息指示强径增益时，网络设备可根据第一时延信息获取强径增益，而不需要再重新确定。
网络设备还可接收来自于终端设备的强径增益，当上行SRS信噪比较低时，网络设备 自身估计的强径增益不一定准确，因此终端设备上报强径增益的方式可进一步提高信道估计准确度。此外，对于非天选场景，终端设备无法在部分端口上发送SRS信号的情况下，可以由终端设备反馈强径增益，使得网络设备仍然可以在各个上行信道上获得部分较为准确的时延。但需要指出的时，同时反馈强径增益会导致更高的反馈开销，只有在部分场景下(比如上面提到的两个场景)才能实现增益大于开销。
示例性的，终端设备可在第一时延信息集合中携带N p个径中至少L个径分别的时延位置的增益，或者，至少L个径分别的时延位置的增益按照n bit进行量化后的值。比如，可以对增益的相位在0-2π内按x bit均匀量化，对增益的幅值，在预先设定的量化范围按y bit均匀量化。
其中，是否在第一时延信息集合中携带强径增益、携带多少个强径增益和/或按照几bit进行量化可由网络设备通过下行信道状态信息反馈配置向终端设备进行指示。
可选的，网络设备可通过第二信息指示终端设备向网络设备反馈第一时延信息集合。该第二信息例如可承载于RRC消息、MAC CE或DCI中。比如，第二信息承载于下行信道状态信息反馈配置，或者说，第二信息包括下行信道状态信息反馈配置。
可选的，网络设备可通过第三信息指示终端设备接收第二时延信息。该第三信息例如可承载于RRC消息、MAC CE或DCI中。该第三信息可与第二信息相同，或者，第二信息可与第三信息承载于同一消息、信令或信息。
应理解，当终端设备未接收到来自于网络设备的第二时延信息时，可根据下行导频信号接收信号估计每个下行信道上的强径位置，获得第一时延信息集合。比如，如果终端设备没有接收到第二时延信息，则可直接对公式四进行OMP求解，获得能量最大的N p个元素的位置，确定第一时延信息集合。
本申请实施例还提供另一种通信方法，该通信方法可由第一通信装置和第二通信装置实施。其中，第一通信装置可包括终端设备或终端设备中的部件(比如处理器、电路、芯片或芯片系统等)，这里的终端设备例如图1所示的终端设备101。第二通信装置可包括网络设备或网络设备中的部件(比如处理器、电路、芯片或芯片系统等)，这里的网络设备例如图1所示的网络设备102。
如图6所示，该方法可包括以下步骤：
S201：终端设备向网络设备发送第一载波单元的上行导频信号。
或者说，终端设备通过第一载波单元向网络设备发送上行导频信号。
可选的，在S201之前，网络设备可向终端设备发送上行导频信号配置。上行导频信号配置的设置方式可参照图4所示流程中的说明，这里不再具体展开。
可选的，这里的上行导频信号为稀疏SRS。
相应地，网络设备接收来自于终端设备的上行导频信号。
S202：网络设备向所述终端设备发送第二载波单元至第F载波单元的下行导频信号，其中F为大于等于2的正整数。其中，第一载波单元为第二载波单元至第F载波单元中的一个。
或者说，网络设备通过第二载波单元至第F载波单元向网络设备发送上行导频信号。
相应地，终端设备接收来自所述网络设备的第二载波单元至第F载波单元的下行导频信号。
可选的，在S203之前，网络设备可向终端设备发送下行信道状态信息反馈配置，用 于终端设备根据该反馈配置向网络设备发送下行信道状态信息。该下行信道状态信息反馈配置的设置可参照图4所示流程中的说明，这里不再具体展开。
S203：终端设备根据所述下行导频信号确定第三时延信息。
该第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径的个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。
可选的，下行信道状态信息反馈配置可用于配置终端设备向网络设备上报第三时延信息，比如，在下行信道状态信息反馈配置中携带用于指示终端设备向网络设备上报第三时延信息的信息。
可选的，下行信道状态信息反馈配置可指示R 1。
S204：终端设备向网络设备发送所述第三时延信息。
相应地，网络设备接收第三时延信息。
可选的，终端设备可在向网络设备反馈的下行信道状态信息中携带第三时延信息。具体方式可参照本申请中在描述下行信道状态信息中携带第一时延信息集合时的说明。
此外，终端设备也可通过下行信道状态信息以外的方式向网络设备发送第三时延信息。比如，终端设备通过下行信道状态信息以外的单独信令向网络设备发送第三时延信息。
S205：网络设备根据所述第三时延信息以及上行导频信号确定所述终端设备的K’个发送端口到网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
采用以上方法，网络设备可根据第一载波单元上的SRS更加准确地估计第二载波单元至第F载波单元上的上行信道，其中，第一载波单元属于第二载波单元至第F载波单元中的一个，以提高传输性能。
以上图6所示方法的步骤也可如图7所示。通过图7可知，当终端设备通过载波单元2发送SRS，且网络设备通过载波单元1至载波单元3发送CSI-RS时，终端设备可估计载波单元1至载波单元3范围内时延信道对应的强径位置，并将估计结果上报至网络设备，由网络设备根据终端设备上报结果和上行导频信号估计终端设备的上行信道。
示例性的，当CSI-RS在第一载波单元f 1和第二载波单元f 2发送，且SRS信号在第一载波单元f 1发送，则网络设备的第i个接收端口接收到的终端设备的第j个发送端口的SRS信号满足：
Figure PCTCN2021119116-appb-000049
其中，h ij(F 1)表示在第一载波单元上网络设备的第i个接收端口与终端设备第j个发送端口间在发送SRS的子载波位置集合F 1上的频域信道，A(F 1)表示DFT行抽取矩阵，该A(F 1)是按照发送SRS的子载波位置集合F 1对DFT矩阵进行行抽取获得的，
Figure PCTCN2021119116-appb-000050
表示网络设备的第i个接收端口与终端设备第j个发送端口间的宽带时延域信道(即联合考虑第二载波单元至第F载波单元的宽带信道所对应的时延信道)，n ij(F 1)表示网络设备的第i个接收端口与终端设备第j个发送端口间的加性噪声向量。
此外，假设用户第j个端口接收网络设备第i个端口发送的CSI-RS信号为z ij(P 1)和z ij(P 2)，则可获得以下公式：
Figure PCTCN2021119116-appb-000051
其中，P 1与P 2分别表示在第一载波单元f 1和第二载波单元f 2上发送CSI-RS的子载波位置集合，P＝P 1∪P 2。
当宽带时延信道
Figure PCTCN2021119116-appb-000052
为稀疏向量，且假定其非零位置为S时，则基于公式十，从z ij(P)中求解S可视为经典的压缩感知问题，终端设备可采用OMP的算法求解S。之后，终端设备将估计的S通过第三时延信息指示给网络设备。网络设备接收第三时延信息，可获知S。S中的元素即网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道的R 1个径分别的时延位置。
此外，根据公式九，各个载波单元频域信道均对应相同的宽带时延信道
Figure PCTCN2021119116-appb-000053
当CSI-RS在第一载波单元f 1和第二载波单元f 2发送时，h ij(F 1)满足：
Figure PCTCN2021119116-appb-000054
其中，近似式是因为
Figure PCTCN2021119116-appb-000055
为稀疏向量，不属于S的元素可忽略。
基于公式十一，则两个载波单元之间的频域信道h ij(F 1)和h ij(F 2)的关系可以表示为：
Figure PCTCN2021119116-appb-000056
其中，D S为对角旋转矩阵，其由F 1、F 2和S唯一确定。举例说明，考虑一个4×4的DFT矩阵，则其后两行F 2＝{3,4}与前两行F 1＝{1,2}具有如下关系：
Figure PCTCN2021119116-appb-000057
如果进一步，当S＝{1,3}时，则D S可满足：
Figure PCTCN2021119116-appb-000058
即在公式十三的基础上抽取对角矩阵中属于S的行和列，形成子矩阵，获得D S。
根据公式十二可知，Φ＝A(F 1,S)D S(A H(F 1,S)A(F 1,S)) -1A H(F 1,S)仅取决于F 1、F 2和S，其中F 1和F 2对于网络设备来说是已知的，S由终端设备上报至网络设备，一旦网络 设备根据第一载波单元上接收的SRS估计出h ij(F 1)，就可以根据h ij(F 2)≈Φh ij(F 1)推导出h ij(F 2)。
可选的，在S203中，终端设备可根据上行导频信号以及下行导频信号确定该第三时延信息。示例性的，终端设备可根据第二载波单元至第F载波单元的下行导频信号确定下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数，并根据发送第一载波单元的上行导频信号的频域资源位置从下行信道的R 2个时延位置中选取R 1个时延位置，根据所述R 1个时延位置确定第三时延信息。
例如，根据公式十二可知，在计算Φ时需要计算(A H(F 1,S)A(F 1,S)) -1，如果A H(F 1,S)A(F 1,S)不可逆，则由h ij(F 1)推导h ij(F 2)就会导致极大的误差。因此，在第一载波单元发送SRS的子载波位置F 1确定后，应选取S，保证A H(F 1,S)A(F 1,S)可逆。为了实现这一目标，一种可能的做法是在公式十中，先通过OMP等算法获得非零位置集合S 1，S 1的元素数量为R 2，也就是说，终端设备可先根据第二载波单元至第F载波单元的下行导频信号确定下行信道的R 2个时延位置。之后，终端设备验证S 1是否满足A H(F 1,S 1)A(F 1,S 1)可逆，如果可逆，则S＝S 1，否则，从S 1中删除对应幅度最小的元素，重新验证删除后的集合是否满足上述条件，直到满足为止。其中确定的S包括的元素数量为R 1。其中，R 1≤R 2。
以上过程以终端设备接收网络设备通过第一载波单元和第二载波单元发送的下行导频信号为例说明了图6所示流程估计上行信道的方法，应理解，当网络设备通过更多载波单元发送下行导频信号时，可通过类似的方法估计上行信道。比如，对以上公式十至公式十四进行适当扩展，用于估计上行信道。具体扩展方式属于本领域技术人员中以上实施理所公开的方式的基础上能够实现的，这里不再赘述。
可选的，网络设备可通过第四信息指示终端设备向网络设备反馈第三时延信息。该第三信息例如可承载于RRC消息、MAC CE或DCI中。比如，第四信息承载于下行信道状态信息反馈配置，或者说，第四信息包括下行信道状态信息反馈配置。
下面结合附图介绍本申请实施例中用来实现上述方法的通信装置。因此，上文中的内容均可以用于后续实施例中，重复的内容不再赘述。
图8为本申请实施例提供的通信装置的示意性框图。示例性地，通信装置例如为图8所示的终端设备800。
终端设备800包括处理模块810和收发模块820。示例性地，终端设备800可以是网络设备，也可以是应用于终端设备中的芯片或者其他具有上述终端设备功能的组合器件、部件等。当终端设备800是终端设备时，收发模块820可以是收发器，收发器可以包括天线和射频电路等，处理模块810可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个中央处理单元(central processing unit，CPU)。当终端设备800是具有上述终端设备功能的部件时，收发模块820可以是射频单元，处理模块810可以是处理器，例如基带处理器。当终端设备800是芯片系统时，收发模块820可以是芯片(例如基带芯片)的输入输出接口、处理模块810可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理模块810可以由处理器或处理器相关电路组件实现，收发模块820可以由收发器或收发器相关电路组件实现。
例如，处理模块810可以用于执行图4或图6所示的实施例中由终端设备所执行的除 了收发操作之外的全部操作，例如S103，和/或用于支持本文所描述的技术的其它过程，比如生成由收发模块820发送的消息、信息和/或信令，和对由收发模块820接收的消息、信息和/或信令进行处理。收发模块820可以用于执行图4或图6所示的实施例中由终端设备所执行的全部接收和发送操作，例如S101、S102、S104、S201、S202和S204，和/或用于支持本文所描述的技术的其它过程。
另外，收发模块820可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块820可以用于执行图4或图6所示的实施例中由终端设备所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块820是发送模块，而在执行接收操作时，可以认为收发模块820是接收模块；或者，收发模块820也可以是两个功能模块，收发模块820可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行图4或图6所示的实施例中由终端设备所执行的全部发送操作，接收模块用于完成接收操作，例如接收模块可以用于执行图4或图6实施例中由终端设备所执行的全部接收操作。
其中，在执行图4所示方法时，收发模块820可用于向网络设备发送上行导频信号，以及接收来自于所述网络设备的下行导频信号。处理模块810可用于根据所述下行导频信号确定第一时延信息集合，所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道；所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。收发模块820还可向所述网络设备发送所述第一时延信息集合。可选的，该第一时延信息集合用于上行信道的估计。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，收发模块820还可接收来自于所述网络设备的第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。则处理模块810可基于所述下行导频信号以及所述第二时延信息，确定所述第一时延信息集合，因此更为高效地确定第一时延信息集合。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引，以降低开销。
在一种可能的设计中，收发模块820还可接收来自所述网络设备的第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布，可进一步提高上行信道估计精度。
在一种可能的设计中，处理模块810可用于基于所述第二时延信息确定所述下行导频 信号的频域位置。
在一种可能的设计中，收发模块820还可接收来自网络设备的第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信息还用于指示所述终端设备接收第二时延信息。
在执行图6所示方法时，收发模块820可向网络设备发送第一载波单元的上行导频信号，并接收来自所述网络设备的第二载波单元至第F载频单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。处理模块810可根据所述下行导频信号确定第三时延信息，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。收发模块820还可向所述网络设备发送所述第三时延信息。
在一种可能的设计中，处理模块810可根据所述上行导频信号以及所述下行导频信号确定第三时延信息。
在一种可能的设计中，处理模块810可根据第二载波单元至第F载波单元的下行导频信号确定所述下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数；处理模块810可根据发送第一载波单元的上行导频信号的频域资源位置从所述下行信道的R 2个时延位置中选取R 1个时延位置；处理模块810可根据所述R 1个时延位置确定第三时延信息。采用该设计，可进一步提高估计准确性。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，收发模块820还可接收来自所述网络设备的第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
图9为本申请实施例提供的另一通信装置的示意性框图。示例性地，通信装置例如为网络设备900。
该网络设备900可包括处理模块910和收发模块920。示例性地，网络设备900可以是所述的网络设备，也可以是应用于网络设备中的芯片或者其他具有上述网络设备功能的组合器件、部件等。当网络设备900是网络设备时，收发模块920可以是收发器，收发器可以包括天线和射频电路等，处理模块910可以是处理器，处理器中可以包括一个或多个CPU。当网络设备900是具有上述网络设备功能的部件时，收发模块920可以是射频单元，处理模块910可以是处理器，例如基带处理器。当网络设备900是芯片系统时，收发模块920可以是芯片(例如基带芯片)的输入输出接口、处理模块910可以是芯片系统的处理器，可以包括一个或多个中央处理单元。应理解，本申请实施例中的处理模块910可以由处理器或处理器相关电路组件实现，收发模块920可以由收发器或收发器相关电路组件实现。
例如，处理模块910可以用于执行图4或者图6所示的实施例中由网络设备所执行的除了收发操作之外的全部操作，例如执行S105，再比如生成由收发模块920发送的消息、信息和/或信令，和/或对由收发模块920接收的消息、信息和/或信令进行处理，和/或用于支持本文所描述的技术的其它过程。收发模块920可以用于执行图4或者图6所示的实施例中由网络设备所执行的全部发送和/或接收操作，例如S101、S102、S104、S201、S202以及S204，和/或用于支持本文所描述的技术的其它过程。
另外，收发模块920可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块920可以用于执行图4或者图6所示的实施例中由网络设备所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块920是发送模块，而在执行接收操作时，可以认为收发模块920是接收模块；或者，收发模块920也可以是两个功能模块，收发模块920可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行图4或者图6所示的实施例中由网络设备所执行的全部发送操作，接收模块用于完成接收操作，例如接收模块可以用于执行图4或者图6所示的实施例中由网络设备所执行的全部接收操作。
其中，在执行上述图4所示方法时，收发模块920可接收来自于终端设备的上行导频信号，并向所述终端设备发送下行导频信号，以及接收来自于所述终端设备的第一时延信息集合。该第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道，所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。处理模块910可根据所述第一时延信息集合以及所述上行导频信号确定所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，收发模块920还可向所述终端设备发送第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的T个径分别的时延位置。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T。所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
在一种可能的设计中，收发模块920还可向所述终端设备发送第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
在一种可能的设计中，收发模块920还可向所述终端设备发送第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信令还用于指示所述终端设备接收第二时延信息。
在执行以上图6所示方法时，收发模块920可接收来自于终端设备的第一载波单元的上行导频信号，并向所述终端设备发送第二载波单元至第F载波单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。收发模块920还可接收来自所述终端设备的第三时延信息，所述第三时延信息 根据所述下行导频信号确定，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。处理模块910可根据所述第三时延信息以及所述上行导频信号确定所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，收发模块920可向所述终端设备发送第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
本申请实施例还提供一种通信装置，该通信装置可以是终端设备也可以是电路。该通信装置可以用于执行上述方法实施例中由终端设备所执行的动作。
当该通信装置为终端设备时，图10示出了一种简化的终端设备的结构示意图。便于理解和图示方便，图10中，终端设备以手机作为例子。如图10所示，终端设备包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图10中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发单元(收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元)，将具有处理功能的处理器视为终端设备的处理单元。如图10所示，终端设备包括收发单元1010和处理单元1020。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1010中用于实现接收功能的器件视为接收单元，将收发单元1010中用于实现发送功能的器件视为发送单元，即收发单元1010包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元1010用于执行上述方法实施例中终端设备的发送操作和接收操作，处理单元1020用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
例如，在一种实现方式中，处理单元1020可以用于执行图4或图6所示的实施例中 由终端设备所执行的除了收发操作之外的全部操作，例如S103，和/或用于支持本文所描述的技术的其它过程，比如生成由收发单元1010发送的消息、信息和/或信令，和对由收发模块1020接收的消息、信息和/或信令进行处理。收发单元1010可以用于执行图4或图6所示的实施例中由终端设备所执行的全部接收和发送操作，例如S101、S102、S104、S201、S202和S204，和/或用于支持本文所描述的技术的其它过程。
示例性的，处理单元1020可执行类似于由处理模块810执行的动作，或者说，处理模块1020包括处理模块810。收发单元1010可执行类似于由收发模块820执行的动作，或者说，收发单元1010包括收发模块820。
当该通信装置为芯片类的装置或者电路时，该装置可以包括收发单元和处理单元。其中，所述收发单元可以是输入输出电路和/或通信接口；处理单元为集成的处理器或者微处理器或者集成电路。
可选的，在执行图4所示方法时，收发单元1010可用于向网络设备发送上行导频信号，以及接收来自于所述网络设备的下行导频信号。处理单元1020可用于根据所述下行导频信号确定第一时延信息集合，所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道；所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。收发单元1010还可向所述网络设备发送所述第一时延信息集合。可选的，该第一时延信息集合用于上行信道的估计。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，收发单元1010还可接收来自于所述网络设备的第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。则处理单元1020可基于所述下行导频信号以及所述第二时延信息，确定所述第一时延信息集合，因此更为高效地确定第一时延信息集合。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引，以降低开销。
在一种可能的设计中，收发单元1010还可接收来自所述网络设备的第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布，可进一步提高上行信道估计精度。
在一种可能的设计中，处理单元1020可用于基于所述第二时延信息确定所述下行导频信号的频域位置。
在一种可能的设计中，收发单元1010还可接收来自网络设备的第二信息，所述第二信 息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信息还用于指示所述终端设备接收第二时延信息。
在执行图6所示方法时，收发单元1010可向网络设备发送第一载波单元的上行导频信号，并接收来自所述网络设备的第二载波单元至第F载频单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。处理单元1020可根据所述下行导频信号确定第三时延信息，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。收发单元1010还可向所述网络设备发送所述第三时延信息。
在一种可能的设计中，处理单元1020可根据所述上行导频信号以及所述下行导频信号确定第三时延信息。
在一种可能的设计中，处理单元1020可根据第二载波单元至第F载波单元的下行导频信号确定所述下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数；处理单元1020可根据发送第一载波单元的上行导频信号的频域资源位置从所述下行信道的R 2个时延位置中选取R 1个时延位置；处理单元1020可根据所述R 1个时延位置确定第三时延信息。采用该设计，可进一步提高估计准确性。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，收发单元1010还可接收来自所述网络设备的第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
本申请实施例中的装置为网络设备时，该装置可以如图11所示。装置1100包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)1110和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)1120。所述RRU 1110可以称为收发模块，该收发模块可以包括发送模块和接收模块，或者，该收发模块可以是一个能够实现发送和接收功能的模块。该收发模块可以与图9中的收发模块920对应，即可由收发模块执行由收发模块920执行的动作。可选地，该收发模块还可以称为收发机、收发电路、或者收发器等等，其可以包括至少一个天线1111和射频单元1112。所述RRU 1110部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送指示信息。所述BBU 1110部分主要用于进行基带处理，对基站进行控制等。所述RRU 1110与BBU 1120可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 1120为基站的控制中心，也可以称为处理模块，可以与图9中的处理模块910对应，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等，此外，可由处理模块执行由处理模块910执行的动作。例如所述BBU(处理模块)可以用于控制基站执行上述方法实施例中关于网络设备的操作流程，例如，执行S302，或生成上述第一配置和第一配置对于的至少一个第二配置、第一信息或第三信息等。
在一个示例中，所述BBU 1120可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网络)，也可以分别支持不同接入制式的无线接入网(如LTE网络，5G网络或其他网络)。所述BBU 1120还包括存储器1121和处理器1122。所述存储器1121用以存储必要的指令和数据。所述处理器1122用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器 1121和处理器1122可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
例如，BBU 1120可以用于执行图4或者图6所示的实施例中由网络设备所执行的除了收发操作之外的全部操作，例如执行S105，再比如生成由RRU 1110发送的消息、信息和/或信令，和/或对由RRU 1110接收的消息、信息和/或信令进行处理，和/或用于支持本文所描述的技术的其它过程。RRU 1110可以用于执行图4或者图6所示的实施例中由网络设备所执行的全部发送和/或接收操作，例如S101、S102、S104、S201、S202自己S204，和/或用于支持本文所描述的技术的其它过程。
其中，在执行上述图4所示方法时，RRU 1110可接收来自于终端设备的上行导频信号，并向所述终端设备发送下行导频信号，以及接收来自于所述终端设备的第一时延信息集合。该第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道，所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置。BBU 1120可根据所述第一时延信息集合以及所述上行导频信号确定所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道。
在一种可能的设计中，P为小于等于M×K的正整数，p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
在一种可能的设计中，所述第一时延信息集合通过下行信道状态信息携带。
在一种可能的设计中，RRU 1110还可向所述终端设备发送第二时延信息，所述第二时延信息用于指示：所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置。
在一种可能的设计中，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T。所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
在一种可能的设计中，RRU 1110还可向所述终端设备发送第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
在一种可能的设计中，RRU 1110还可向所述终端设备发送第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
在一种可能的设计中，所述第二信令还用于指示所述终端设备接收第二时延信息。
在执行以上图6所示方法时，RRU 1110可接收来自于终端设备的第一载波单元的上行导频信号，并向所述终端设备发送第二载波单元至第F载波单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个。RRU 1110还可接收来自所述终端设备的第三时延信息，所述第三时延信息根据所述下行导频信号确定，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备 的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置。BBU 1120可根据所述第三时延信息以及所述上行导频信号确定所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
在一种可能的设计中，所述第三时延信息通过下行信道状态信息携带。
在一种可能的设计中，RRU 1110可向所述终端设备发送第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
本申请实施例提供一种通信系统。该通信系统可以包括上述的图1所示的实施例所涉及的终端设备，以及包括图1所示的实施例所涉及的网络设备。可选的，该通信系统中的终端设备和网络设备可执行图4或图6所述的通信方法。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图4或图6所示的实施例中与终端设备相关的流程。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图4或图6所示的实施例中与网络设备相关的流程。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图4或图6所示的实施例中与网络设备相关的流程。
本申请实施例还提供一种计算机程序产品，所述计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，所述计算机可以实现上述方法实施例提供的图4或图6所示的实施例中与终端设备相关的流程。
本申请实施例还提供一种芯片或芯片系统，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例提供的图4或图6所示的实施例中与终端设备相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
本申请实施例还提供一种芯片或芯片系统，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例提供的图4或图6所示的实施例中与网络设备相关的流程。该芯片系统可包括该芯片，还可存储器或收发器等其他组件。
应理解，本申请实施例中提及的处理器可以是CPU，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态 随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的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。以此为例但不限于：计算机可读介质可以包括随机存取存储器(random access memory，RAM)、只读存储器(read-only memory，ROM)、电可擦可编程只读存储器(electrically erasable programmable read only memory，EEPROM)、紧凑型光盘只读存储器(compact disc read-only memory，CD-ROM)、通用串行总线闪存盘(universal serial bus flash disk)、移动硬盘、或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构 形式的期望的程序代码并能够由计算机存取的任何其他介质。
以上所述，仅为本申请的具体实施方式，但本申请实施例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实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (32)

  1. 一种通信方法，其特征在于，包括：
    终端设备向网络设备发送上行导频信号；
    所述终端设备接收来自于所述网络设备的下行导频信号；
    所述终端设备根据所述下行导频信号确定第一时延信息集合，所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道；所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置；
    所述终端设备向所述网络设备发送所述第一时延信息集合。
  2. 如权利要求1所述的方法，其特征在于，
    所述P为小于等于M×K的正整数，所述p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一时延信息集合通过下行信道状态信息携带。
  4. 如权利要求1-3中任一所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自于所述网络设备的第二时延信息，所述第二时延信息用于指示：
    所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道的T个径分别的时延位置；
    所述终端设备根据所述下行导频信号确定第一时延信息集合，包括：
    所述终端设备根据所述下行导频信号以及所述第二时延信息，确定所述第一时延信息集合。
  5. 如权利要求4所述的方法，其特征在于，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
  6. 如权利要求1-4中任一所述的方法，其特征在于，所述终端设备接收来自所述网络设备的第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
  7. 如权利要求4或5所述的方法，其特征在于，所述终端设备根据所述第二时延信息确定所述下行导频信号的频域位置。
  8. 如权利要求1-7中任一所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自网络设备的第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
  9. 如权利要求8所述的方法，其特征在于，所述第二信息还用于指示所述终端设备接收第二时延信息。
  10. 一种通信方法，其特征在于，包括：
    网络设备接收来自于终端设备的上行导频信号；
    所述网络设备向所述终端设备发送下行导频信号；
    所述网络设备接收来自于所述终端设备的第一时延信息集合，
    所述第一时延信息集合包括P个第一时延信息，所述P个第一时延信息中的第p个第一时延信息与所述网络设备和所述终端设备之间的一个下行信道有关，所述与所述第p个第一时延信息有关的下行信道为所述网络设备的一个发送端口到所述终端设备的一个接收端口间的下行信道，所述第p个第一时延信息用于指示以下中的至少一个：与所述第p个第一时延信息对应的下行信道的径的个数N p，N p为正整数；或者，N p个径中L个径分别的时延增益，L为小于等于N p的正整数；或者，与所述第p个第一时延信息对应的下行信道的N p个径分别的时延位置；
    所述网络设备根据所述第一时延信息集合以及所述上行导频信号确定所述终端设备的K’个发送端口与所述网络设备的M’个接收端口之间的上行信道。
  11. 如权利要求10所述的方法，其特征在于，所述P为小于等于M×K的正整数，所述p＝1、2……P，M表示所述网络设备的发送端口数，K表示所述终端设备的接收端口数。
  12. 如权利要求10或11所述的方法，其特征在于，所述第一时延信息集合通过下行信道状态信息携带。
  13. 如权利要求10-12中任一所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第二时延信息，所述第二时延信息用于指示：
    所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的径的个数T，其中T为正整数；和/或所述终端设备的K’个发送端口与所述网络设备M’个接收端口之间的上行信道的T个径分别的时延位置。
  14. 如权利要求13所述的方法，其特征在于，所述第p个第一时延信息中的N p个径的时延位置为所述T个径的时延位置的子集，N p≤T，所述第p个第一时延信息具体用于指示所述N p个径的时延位置在所述T个径的时延位置中的索引。
  15. 如权利要求10-14中任一所述的方法，其特征在于，所述网络设备向所述终端设备发送第一信息，所述第一信息用于指示所述下行导频信号的频域位置，其中所述下行导频信号的频域位置非等间隔分布。
  16. 如权利要求10-15中任一所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第二信息，所述第二信息用于指示所述终端设备发送第一时延信息集合。
  17. 如权利要求16所述的方法，其特征在于，所述第二信令还用于指示所述终端设备接收第二时延信息。
  18. 一种通信方法，其特征在于，包括：
    终端设备向网络设备发送第一载波单元的上行导频信号；
    所述终端设备接收来自所述网络设备的第二载波单元至第F载频单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个；
    所述终端设备根据所述下行导频信号确定第三时延信息，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述 第 F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置；
    所述终端设备向所述网络设备发送所述第三时延信息。
  19. 如权利要求18所述的方法，其特征在于，所述终端设备根据所述下行导频信号确定第三时延信息，包括：
    所述终端设备根据所述上行导频信号以及所述下行导频信号确定第三时延信息。
  20. 如权利要求19所述的方法，其特征在于，所述终端设备根据所述上行导频信号以及所述下行导频信号确定第三时延信息，包括：
    所述终端设备根据第二载波单元至第F载波单元的下行导频信号确定所述下行信道的R 2个时延位置，其中R 2为大于等于R 1的正整数；
    所述终端设备根据发送第一载波单元的上行导频信号的频域资源位置从所述下行信道的R 2个时延位置中选取R 1个时延位置；
    所述终端设备根据所述R 1个时延位置确定第三时延信息。
  21. 如权利要求18-20中任一所述的方法，其特征在于，所述第三时延信息通过下行信道状态信息携带。
  22. 如权利要求18-21中任一所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
  23. 一种通信方法，其特征在于，包括：
    网络设备接收来自于终端设备的第一载波单元的上行导频信号；
    所述网络设备向所述终端设备发送第二载波单元至第 F载波单元的下行导频信号，其中F为大于等于2的正整数，所述第一载波单元为所述第二载波单元至所述第F载频单元中的一个；
    所述网络设备接收来自所述终端设备的第三时延信息，所述第三时延信息根据所述下行导频信号确定，所述第三时延信息与所述网络设备的M个发送端口到所述终端设备的K个接收端口之间的所述第二载波单元至所述第F载波单元的下行信道有关，所述第三时延信息用于指示：所述下行信道的径个数R 1，R 1为正整数；和/或，所述下行信道R 1个径分别的时延位置；
    所述网络设备根据所述第三时延信息以及所述上行导频信号确定所述终端设备的K’个发送端口到所述网络设备的M’个接收端口之间的所述第二载波单元至所述第F载波单元的上行信道。
  24. 如权利要求23所述的方法，其特征在于，所述第三时延信息通过下行信道状态信息携带。
  25. 如权利要求23或24所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送第四信息，所述第四信息用于指示所述终端设备向所述网络设备发送所述第三时延信息。
  26. 一种通信装置，其特征在于，包括
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求1-9中任一项所述的方法。
  27. 一种通信装置，其特征在于，包括
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求10-17中任一项所述的方法。
  28. 一种通信装置，其特征在于，包括
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求18-22中任一项所述的方法。
  29. 一种通信装置，其特征在于，包括
    存储器，用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求23-25中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至25中任一项所述的方法。
  31. 一种计算机程序产品，其特征在于，所述计算机程序产品包括指令，当处理器执行所述指令时，实现如权利要求1至25中任一项所述的方法。
  32. 一种芯片，其特征在于，包括处理器，所述处理器与存储器耦合，当所述处理器执行所述存储器中存储的所述计算机程序或指令时，如权利要求1至25中任意一项所述的方法被执行。
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