WO2022160963A1 - 一种通信方法及装置 - Google Patents
一种通信方法及装置 Download PDFInfo
- Publication number
- WO2022160963A1 WO2022160963A1 PCT/CN2021/136655 CN2021136655W WO2022160963A1 WO 2022160963 A1 WO2022160963 A1 WO 2022160963A1 CN 2021136655 W CN2021136655 W CN 2021136655W WO 2022160963 A1 WO2022160963 A1 WO 2022160963A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- information
- spatial filtering
- reference signals
- filtering parameters
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 159
- 238000004891 communication Methods 0.000 title claims abstract description 100
- 238000001914 filtration Methods 0.000 claims abstract description 244
- 239000011159 matrix material Substances 0.000 claims abstract description 132
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 239000013598 vector Substances 0.000 claims description 58
- 230000015654 memory Effects 0.000 claims description 38
- 238000004590 computer program Methods 0.000 claims description 33
- 238000013139 quantization Methods 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 30
- 230000000875 corresponding effect Effects 0.000 description 62
- 238000012549 training Methods 0.000 description 41
- 230000006870 function Effects 0.000 description 38
- 230000005540 biological transmission Effects 0.000 description 33
- 230000008569 process Effects 0.000 description 27
- 238000013461 design Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000006399 behavior Effects 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000011002 quantification Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 230000003190 augmentative effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229940050561 matrix product Drugs 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
- H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
-
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—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
- H04L25/0204—Channel estimation of multiple channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- the present application relates to the field of communication technologies, and in particular, to a communication method and device.
- the beam training process between the base station and the terminal equipment is completed by the channel state information (CSI) reporting process.
- the main process is that the base station configures multiple reference signals for the terminal equipment, including information such as the time-frequency position of each reference signal, the reference signal index, and the number of ports.
- the base station may adopt different spatial filtering parameters, that is, send the reference signal in different beam directions.
- the terminal device receives each reference signal configured by the base station and measures its reference signal received power (reference signal received power, RSRP), and then reports the reference signal indices of several reference signals with higher RSRP and their corresponding RSRP quantization values.
- RSRP reference signal received power
- the base station After the base station receives the report information from the terminal equipment, since the base station itself knows the spatial filtering parameters used to send each reference signal, the base station can finally determine which spatial filtering parameters are used to send signals in which directions so that the terminal equipment can receive the signal. to higher energy signals, and finally complete the beam training process.
- the existing beam training process in NR generally includes two stages: in the first stage, the base station periodically sends a synchronization signal/physical broadcast channel block (SSB), and the sending direction of each SSB in a cycle Differently, the transmission direction of each SSB can be regarded as a beam.
- the terminal equipment can measure the SSB to determine an SSB with a better measurement result.
- the base station can divide the beam direction of the SSB determined by the terminal device into multiple beamlets with narrow widths, and continue to send a non-zero power channel state information reference signal (non-zero power channel state information) in each beamlet direction. reference signal, NZP-CSI-RS), and then determine a better beamlet direction according to the NZP-CSI-RS measurement information reported by the user, that is, the beam direction actually used for subsequent data transmission.
- NZP-CSI-RS non-zero power channel state information reference signal
- the optimal wide beam may not include the optimal thin beam; Multiple measurements are made, resulting in high overhead.
- the present application provides a communication method and apparatus to reduce the problem of high beam training overhead.
- the present application provides a communication method, which is suitable for a scenario of beam training in side-link communication.
- the execution body of the method is the second device or a chip or a module in the second device, and the description is made by taking the second device as the execution body as an example.
- the method includes: the second device receives configuration information from the first device, the configuration information includes first information, second information and third information; the first information is indication information of K reference signals, and the second information is related to K reference signals The indication information of the K first spatial filtering parameters corresponding to the reference signal, and the third information is the indication information of the channel sparse basis matrix of the channel between the first device and the second device; K is an integer greater than 1; The K reference signals of the K reference signals are sent to the first device, and the channel state indication information is determined according to the K received measurement values of the K reference signals, the K first spatial filtering parameters, and the channel sparse basis matrix.
- the configuration information also includes the indication information of the first spatial filtering parameter and the channel sparse basis matrix of the reference signal sent by the first device. Based on the above information, the first device only needs to send a small amount of reference signals, and the second device can estimate the channel based on the configuration information, and then determine the channel state indication information based on the estimated channel, reducing reference signal overhead and time overhead.
- one reference signal among the K reference signals has a corresponding relationship with one first spatial filtering parameter among the K first spatial filtering parameters.
- the second information includes K row indices or column indices in the analog precoding codebook; the K row indices or column indices indicate K analog precoding vectors in the analog precoding codebook; K The first spatial filtering parameters are the K analog precoding vectors indicated by the second information; the analog precoding codebook is preconfigured or configured by default.
- the third information includes the size of the antenna array of the first device, and the channel sparse basis matrix is determined according to the discrete Fourier transform matrix corresponding to the size of the antenna array of the first device.
- the configuration information further includes fourth information, where the fourth information is indication information of the K phase tracking reference signals; a phase tracking reference signal among the K phase tracking reference signals, and one of the K reference signals A reference signal is transmitted in the same time unit.
- the phase information caused by the channel in the received reference signal can be retained, thereby making subsequent channel estimation and beam training more accurate.
- it also includes: receiving K phase tracking reference signals from the first device; the K phase tracking reference signals are sent through the same spatial filtering parameter; wherein one spatial filtering parameter is the K th One spatial filtering parameter in one spatial filtering parameter; or, one spatial filtering parameter is a spatial filtering parameter different from the K first spatial filtering parameters.
- phase tracking reference signal By using the phase tracking reference signal, the phase noise on different symbols in the beam training process can be eliminated, and the accuracy of the beam training can be improved.
- the channel state indication information includes a quantized value of the estimated value of the angle domain channel
- the estimated value of the angle domain channel is based on the K received measurement values of the K reference signals, the K first spatial domain filtering parameters, and The channel sparse basis matrix is determined
- the quantized value of the estimated value of the angle-domain channel includes the quantized value of the amplitude and phase of at least one element in the estimated value of the angle-domain channel, or includes the estimated value of the angle-domain channel.
- the channel state indication information includes the quantized value of the estimated value of the channel, and the estimated value of the channel is based on the K received measurement values of the K reference signals, the Kth A spatial filter parameter and a channel sparse basis matrix are determined, and the quantized value of the channel estimated value includes a quantized value of the amplitude and phase of at least one element of the channel estimated value, or includes at least one of the channel estimated values.
- the channel state indication information further includes at least one of the following information: an index of the at least one element in the estimated value of the angle-domain channel in the estimated value of the angle-domain channel; Story index.
- M is a matrix formed by K first spatial filtering parameters
- D is the channel sparse basis matrix of the channel between the first device and the second device indicated by the third information
- ⁇ is a preset value.
- the configuration information further includes fifth information, where the fifth information is used to indicate a plurality of second spatial filtering parameters.
- the channel state indication information includes at least one second spatial filtering parameter among the plurality of second spatial filtering parameters or an index of the at least one second spatial filtering parameter among the plurality of second spatial filtering parameters; or , the channel state indication information includes at least one second spatial filtering parameter in the plurality of second spatial filtering parameters or the index of the at least one second spatial filtering parameter in the plurality of second spatial filtering parameters, and at least one second spatial filtering parameter Corresponding channel gain quantization value; wherein, the channel gain quantization value corresponding to at least one second spatial filtering parameter and at least one second spatial filtering parameter is based on K received measurement values of K reference signals, K first spatial filtering parameters And the channel sparse basis matrix is determined.
- the present application provides a communication method, which is suitable for a scenario of beam training in side link communication.
- the execution body of the method is the first device or a chip or a module in the first device, and the description is given by taking the first device as the execution body as an example.
- the method includes: a first device sends configuration information to a second device, where the configuration information includes first information, second information and third information; the first information indicates K reference signals, and the second information indicates K reference signals corresponding to the K reference signals.
- the third information indicates the channel sparse basis matrix of the channel between the first device and the second device; send K reference signals to the second device; receive the channel state indication information from the second device, the channel The state indication information is based on the K received measurement values of the K reference signals, the K first spatial filtering parameters, and the channel sparse basis matrix.
- sending the K reference signals to the second device includes: using one of the K first spatial filtering parameters to send one reference signal among the K reference signals.
- the second information includes K row indices or column indices in the analog precoding codebook; the K row indices or column indices indicate K analog precoding vectors in the analog precoding codebook; K The first spatial filtering parameters are the K analog precoding vectors indicated by the second information; the analog precoding codebook is preconfigured or configured by default.
- the third information includes the size of the antenna array of the first device, and the channel sparse basis matrix is determined according to the discrete Fourier transform matrix corresponding to the size of the antenna array of the first device.
- the configuration information further includes fourth information, where the fourth information is indication information of the K phase tracking reference signals; a phase tracking reference signal among the K phase tracking reference signals, and one of the K reference signals A reference signal is transmitted in the same time unit.
- it also includes: sending K phase tracking reference signals to the second device through the same spatial filtering parameter; wherein one spatial filtering parameter is one spatial filtering parameter in the K first spatial filtering parameters; Alternatively, one spatial filtering parameter is a spatial filtering parameter different from the K first spatial filtering parameters.
- the channel state indication information includes a quantized value of the estimated value of the angle domain channel
- the estimated value of the angle domain channel is based on the K received measurement values of the K reference signals, the K first spatial domain filtering parameters, and The channel sparse basis matrix is determined
- the quantized value of the estimated value of the angle-domain channel includes the quantized value of the amplitude and phase of at least one element in the estimated value of the angle-domain channel, or includes the estimated value of the angle-domain channel.
- the channel state indication information includes the quantized value of the estimated value of the channel, and the estimated value of the channel is based on the K received measurement values of the K reference signals, the Kth A spatial filter parameter and a channel sparse basis matrix are determined, and the quantized value of the channel estimated value includes a quantized value of the amplitude and phase of at least one element of the channel estimated value, or includes at least one of the channel estimated values.
- the channel state indication information further includes at least one of the following information: an index of the at least one element in the estimated value of the angle-domain channel in the estimated value of the angle-domain channel; Story index.
- M is a matrix formed by K first spatial filtering parameters
- D is the channel sparse basis matrix of the channel between the first device and the second device indicated by the third information
- ⁇ is a preset value.
- the configuration information further includes fifth information, where the fifth information is used to indicate a plurality of second spatial filtering parameters.
- the channel state indication information includes at least one second spatial filtering parameter among the plurality of second spatial filtering parameters or an index of the at least one second spatial filtering parameter among the plurality of second spatial filtering parameters; or , the channel state indication information includes at least one second spatial filtering parameter in the plurality of second spatial filtering parameters or the index of the at least one second spatial filtering parameter in the plurality of second spatial filtering parameters, and at least one second spatial filtering parameter Corresponding channel gain quantization value; wherein, the channel gain quantization value corresponding to at least one second spatial filtering parameter and at least one second spatial filtering parameter is based on K received measurement values of K reference signals, K first spatial filtering parameters And the channel sparse basis matrix is determined.
- the present application provides a communication device, where the communication device can execute any one of the methods provided in the first aspect.
- the apparatus described above includes one or more processors and communication units.
- the one or more processors are configured to support the apparatus to perform the corresponding functions of the second device in the above method.
- the communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, receive configuration information.
- the communication unit is configured to receive configuration information from the first device, where the configuration information includes first information, second information, and third information; the first information is indication information of the K reference signals, and the first information is The second information is the indication information of the K first spatial filtering parameters corresponding to the K reference signals, and the third information is the indication information of the channel sparse basis matrix of the channel between the first device and the second device; K is an integer greater than 1 ; Receive K reference signals from the first device;
- a processing unit configured to determine the channel state indication information according to the K received measurement values of the K reference signals, the K first spatial filtering parameters and the channel sparse basis matrix;
- a communication unit configured to send channel state indication information to the first device.
- the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the network device.
- the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
- the apparatus may be a base station, a gNB or a TRP, etc.
- the communication unit may be a transceiver or a transceiver circuit.
- the transceiver may also be an input/output circuit or an interface.
- the device may also be a communication chip.
- the communication unit may be an input/output circuit or an interface of a communication chip.
- the above device includes a transceiver, a processor and a memory.
- the processor is used for controlling the transceiver to send and receive signals
- the memory is used for storing a computer program
- the processor is used for running the computer program in the memory, so that the apparatus executes the first aspect or the second aspect in any possible implementation manner of the first aspect The method by which the device is completed.
- the present application provides a communication device, where the communication device can perform any one of the methods provided in the second aspect.
- the apparatus described above includes one or more processors and communication units.
- the one or more processors are configured to support the apparatus to perform functions corresponding to the first device in the above method.
- the communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending.
- the processing unit is configured to send configuration information to the second device through the communication unit, where the configuration information includes first information, second information and third information; the first information indicates K reference signals, the second The information indicates K first spatial filtering parameters corresponding to the K reference signals, and the third information indicates the channel sparse basis matrix of the channel between the first device and the second device; sending the K reference signals to the second device;
- the processing unit is configured to receive, through the communication unit, channel state indication information from the second device, where the channel state indication information is based on the K received measurement values of the K reference signals, the K first spatial filtering parameters, and the channel sparse basis matrix.
- the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the network device.
- the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.
- the apparatus may be a base station, a gNB or a TRP, etc.
- the communication unit may be a transceiver or a transceiver circuit.
- the transceiver may also be an input/output circuit or an interface.
- the device may also be a communication chip.
- the communication unit may be an input/output circuit or an interface of a communication chip.
- the above device includes a transceiver, a processor and a memory.
- the processor is used to control the transceiver to send and receive signals
- the memory is used to store a computer program
- the processor is used to run the computer program in the memory, so that the apparatus executes the second aspect or the first aspect in any possible implementation manner of the second aspect The method by which the device is completed.
- the present application provides a beam training method, including: a transmitting end sending a reference signal, and the reference information includes indication information of spatial filtering parameters and a channel sparse basis matrix, and indication information of a set of available spatial filtering parameters of the transmitting end device;
- the receiving end device can complete the channel estimation based on the configuration information and the compressive sensing recovery algorithm; the receiving end device determines the best transmit beam based on the estimated channel.
- a communication device comprising a processor and an interface circuit
- the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
- the processor is configured to execute the computer program or instructions stored in the memory to implement the first aspect and the method in any possible implementation manner of the first aspect.
- a communication device comprising a processor and an interface circuit
- the interface circuit is configured to receive signals from other communication devices other than the communication device and transmit to the processor or send signals from the processor
- the processor is configured to execute the computer program or instructions stored in the memory to implement the aforementioned second aspect and the method in any possible implementation manner of the second aspect.
- a computer-readable storage medium is provided, and a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed on a computer, the computer is made to implement the aforementioned first aspect and the method in any possible implementation manner of the first aspect.
- a computer-readable storage medium is provided, and a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed on a computer, the computer is made to implement the aforementioned second aspect and a method in any possible implementation manner of the second aspect.
- a tenth aspect provides a computer program product that stores computer-readable instructions, which, when the computer-readable instructions are executed on a computer, enable the computer to implement the first aspect and any possible possibility of the first aspect. method in the implementation.
- a computer program product storing computer-readable instructions, which, when the computer-readable instructions are executed on a computer, enable the computer to implement the second aspect and any possibility in the second aspect method in the implementation.
- a twelfth aspect provides a chip, the chip includes a processor, and may further include a memory for executing computer programs or instructions stored in the memory, so that the chip implements any one of the foregoing first to second aspects , and a method in any possible implementation of any aspect.
- a communication system includes the apparatus (eg, the second device) according to the sixth aspect and the apparatus (eg, the first device) according to the seventh aspect.
- FIG. 1 is a schematic diagram of a beam training provided by an embodiment of the present application
- FIG. 2 is a schematic diagram of a network architecture suitable for an embodiment of the present application
- FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
- FIG. 4 is a schematic diagram of a reference signal provided by an embodiment of the present application.
- FIG. 5 is a schematic diagram of a reference signal provided by an embodiment of the present application.
- FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- the embodiments of the present application may be applied to various mobile communication systems, including but not limited to 4G systems, 5G systems, 5G sidelink (SL) systems, 5G evolution systems, and 5G evolution SL systems.
- the 5G system includes a new radio (NR) system
- the 4G system includes a global system of mobile communication (GSM) system, a long term evolution (LTE) system, etc. make restrictions.
- GSM global system of mobile communication
- LTE long term evolution
- the present application can be applied to communication in the millimeter wave frequency band.
- the mmWave frequency band is generally considered to be the electromagnetic wave frequency range from 30GHz to 300GHz.
- millimeter wave has wider spectrum resources, which can support high data rate transmission, and the wavelength of millimeter wave is very small, so the antenna size is smaller and more convenient for multiple antennas Therefore, millimeter wave communication is a key technology in 5G systems and future communication systems.
- the channel attenuation of the millimeter wave frequency band is very large, so the equipment communicating in the millimeter wave frequency band needs to use beamforming or other technologies, and use specific spatial filtering parameters to make the energy of the signal. Focusing on a specific direction, that is, a specific beam direction, improves the equivalent channel gain between the transceivers, thereby ensuring the coverage performance and transmission data rate of millimeter wave communication. In general, we believe that there is a correspondence between beam and spatial filtering parameters for a given antenna structure.
- precoding is mainly divided into digital precoding and analog precoding.
- Digital precoding depends on multiple radio frequency channels, but due to the high cost of radio frequency channels, the beamforming gain achieved by digital precoding using only a small number of radio frequency channels is small.
- the beamforming gain of the device mainly depends on analog precoding: that is, the broadband signal will go through a phase shifter before being sent through each antenna element, and the signal sent by each antenna has a different phase difference with respect to the original signal. Different phase differences constitute the analog precoding vector, so that the signal can be spatially concentrated in a specific direction.
- the analog precoding vector is its spatial filtering parameter.
- the spatial filtering parameter may be equivalent to the analog precoding vector. Because the entire wideband signal on the next symbol of the analog precoding technology can only be sent using the same analog precoding vector, it takes a lot of time to search all possible beam directions in the beam training phase, which makes beam training very expensive. , the transmission efficiency is low, and the mobility support is also poor.
- the beam training process between the base station and the terminal in the NR system is completed by the channel state information reporting (CSI-reporting) process.
- the main process is that the base station first configures multiple reference signals for the terminal, including information such as the time-frequency position of each reference signal, the reference signal index, and the number of ports.
- the base station may adopt different spatial filtering parameters, that is, send the reference signal in different beam directions.
- the user receives each reference signal configured by the base station and measures its reference signal received power (RSRP), and then reports the reference signal indices of several reference signals with higher RSRP and their corresponding RSRP quantization values.
- RSRP reference signal received power
- the base station After the base station receives the report information from the terminal equipment, since the base station itself knows the spatial filtering parameters used to send each reference signal, the base station can finally determine which spatial filtering parameters are used to send signals in which directions so that the terminal equipment can receive the signal. to higher energy signals, and finally complete the beam training process.
- SSB synchronization signal/physical broadcast channel block
- NZP-CSI-RS non-zero power channel state information reference signal
- SSB is a cell-specific periodic reference signal, which is periodically sent by each base station. It is mainly used for synchronization between the terminal and the base station and for broadcasting basic configuration information in some cells. The base station usually considers when sending SSB.
- the base station generally first allows the terminal to measure the periodic SSB, first determine a better wide transmission beam direction, and then configure several NZP-CSI-RS for the user , using the determined beamlet direction within the wide beam direction to continue sending NZP-CSI-RS, and then determine a better beamlet direction according to the NZP-CSI-RS measurement information reported by the user, that is, the beam direction for data transmission.
- the two-stage beam training process requires fewer beams to be searched, thereby reducing the time overhead of beam training to a certain extent.
- the above beam training method (1) The time overhead of the first stage is still relatively large. This method relies on the measurement information of the SSB in the first order, and the SSB is a cell-specific periodic reference signal whose period is generally fixed and relatively long, such as one round of SSB in the current NR (covering all coarse beam directions)
- the transmission period of the SSB varies from 5ms to 120ms, so although the two-stage search method can significantly reduce the number of beam searches, the relatively fixed time-frequency position configuration of the SSB makes the time overhead of the first stage relatively large.
- the broad beam direction determined by relying on the SSB measurement information in the first stage may not contain the actual best beamlet direction, so that the performance of the finally determined beamlet direction is not optimal.
- the SSB is sent in the wide beam direction in the first stage, there may be multiple strong paths in a wide beam. If the phases of the multiple paths exist The relationship of phase cancellation is likely to cause the RSRP measured by the terminal at the time-frequency position corresponding to the SSB to be very small, resulting in missed detection of an effective path.
- the beam direction used by the base station is sufficiently thin, different beam directions can be covered by different beam directions, that is, directly using the measurement information of the beamlet can ensure that the found beamlet direction is the actual best beamlet direction. Therefore, the broad beam direction determined by relying on the SSB measurement information in the first stage may not include the actual best beamlet direction, so that the performance of the finally determined beamlet direction is not optimal.
- the present invention uses the compressed sensing algorithm to directly estimate the channel, and then uses the estimated channel and the preset spatial domain filtering parameter set to determine the transmit beam direction. Based on this, the embodiments of the present application involve the following aspects:
- the transmitting end device sends configuration information to the receiving end device.
- the configuration information includes the time-frequency positions of the K channel state information reference signals (CSI-RS), and the K spatial domains corresponding to the K CSI-RSs.
- CSI-RS channel state information reference signals
- phase tracking reference signal Phase tracking reference signal, PTRS
- PTRS phase tracking reference signal
- the receiving end estimates the channel according to the received CSI-RS, the configuration information of the transmitting end device and the corresponding compressed sensing algorithm, the receiving end estimates the channel, and then reports:
- Method 1 Indication information of the estimated channel
- Method 2 Determine the optimal at least one spatial filtering parameter according to the estimated channel and the available spatial filtering parameter set configured by the transmitting end, and then report information indicating the spatial filtering parameter.
- a terminal device is a device with a wireless transceiver function or a chip that can be provided in the device, and may also be referred to as a terminal.
- the device with wireless transceiver function may also be called user equipment (user equipment, UE), customer terminal equipment (Customer Premise Equipment, CPE), relay, access terminal, subscriber unit, subscriber station, mobile station, Remote station, remote terminal, mobile device, user terminal, user agent or user device.
- user equipment user equipment
- CPE Customer Premise Equipment
- the terminal device in the embodiments of the present application may 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) terminals, industrial control, self driving, remote medical, smart grid, transportation safety, smart city and smart home (smart home) wireless terminal and so on.
- the embodiments of the present application do not limit application scenarios.
- the aforementioned device with wireless transceiver function and the chip that can be installed in the device are collectively referred to as terminal device.
- the network device may be a wireless access device under various standards.
- the network device in this application may be a next-generation base station (next Generation node B, gNB) in an NR system, or an evolved node B ( evolved Node B (eNB), radio network controller (RNC) or Node B (Node B, NB) or base station, base station controller (BSC), base transceiver station (BTS) ), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), SL unit, wireless fidelity (wireless fidelity, WIFI) system access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc., it can also be a gNB or transmission point (TRP or TP) in the 5G (NR) system, One or a group (including multiple antenna panels) antenna panels of a base station in a 5G system
- This application can be widely used in various scenarios, such as: cellular communication, sidelink (SL), device-to-device (D2D), vehicle to everything (V2X), Vehicle to Vehicle (V2V), Machine-to-machine/machine-type communications (M2M/MTC), Internet of Things (IoT) and other scenarios.
- SL sidelink
- D2D device-to-device
- V2X vehicle to everything
- V2V Vehicle to Vehicle
- M2M/MTC Machine-to-machine/machine-type communications
- IoT Internet of Things
- FIG. 2 it is a schematic diagram of an application scenario applicable to the embodiment of the present application.
- the terminal device 1 can directly communicate with the terminal device 2 , and the terminal device 1 can also communicate with the network device through the terminal device 2 .
- the link between terminal equipment and terminal equipment may be referred to as a sidelink.
- the network device may pre-configure multiple resources on the sidelink, and the terminal device may perceive the available resources among the above multiple resources, and select the resources among them for data transmission.
- the network device in FIG. 2 is, for example, an access network device, and the access network device may be, for example, a base station.
- the access network device corresponds to different devices in different systems, for example, in the 4G system, it can correspond to the eNB, and in the 5G system, it can correspond to the gNB.
- the technical solutions provided in the embodiments of the present application can also be applied to future mobile communication systems, so the access network equipment in FIG. 2 can also correspond to network equipment in future mobile communication systems.
- the access network device is an example of a base station.
- the access network device may also be a roadside unit (road side unit, RSU) and other devices.
- This application is suitable for short-range communication scenarios such as SL, because in short-range communication scenarios such as SL, even if the beam energy of the transmitted reference signal is not concentrated, the signal-to-noise ratio (SNR) will not be particularly low, and the receiving end The error of measuring the reference signal is not particularly large, which can ensure the accuracy of beam training.
- SNR signal-to-noise ratio
- the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
- the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
- the interaction between the first device and the second device is used as an example for description.
- the operations performed by the first device can also be performed by a chip or module inside the first device, and the operations performed by the second device can also be performed by the second device.
- a chip or module inside the device executes.
- the first device may be a network device or a terminal device, and the second device may also be a network device or a terminal device, which is not limited in this embodiment of the present application.
- the first device may be the terminal device 1 or 2 in FIG. 2 , or the network device in FIG. 2 ; the second device may be the terminal device 1 or 2 in FIG. 2 , or the network device in FIG. 2 .
- FIG. 3 a schematic flowchart of a communication method provided by an embodiment of the present application is shown. Referring to Figure 3, the method includes:
- S301 The first device sends configuration information to the second device.
- S302 The second device receives configuration information from the first device.
- the configuration information may include first information, second information and third information; the first information is the indication information of the K reference signals, and the second information is the indication of the K first spatial filtering parameters corresponding to the K reference signals information, and the third information is the indication information of the channel sparse basis matrix of the channel between the first device and the second device; K is an integer greater than 1.
- K is an integer greater than 1.
- the antenna array of the second device includes N 1 N 2 antennas, K may be smaller than N 1 N 2 . Both N 1 and N 2 are integers greater than 0.
- the reference signal may refer to a CSI-RS, or may refer to other types of reference signals, which is not limited in this application.
- the first information may include time-frequency location information of the K reference signals, and information such as reference signal resource indices of the K reference signals, where the K reference signals are located in different time units, and one time unit It may be an OFDM symbol in orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM), or a time slot in other systems, etc., which is not limited in this embodiment of the present application.
- information such as reference signal resource indices of the K reference signals, where the K reference signals are located in different time units, and one time unit It may be an OFDM symbol in orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM), or a time slot in other systems, etc., which is not limited in this embodiment of the present application.
- one reference signal among the K reference signals has a corresponding relationship with one first spatial filtering parameter among the K first spatial filtering parameters, and the corresponding relationship is pre-configured.
- One reference signal corresponds to one first spatial filtering parameter, and different reference signals may correspond to different first spatial filtering parameters.
- the first device when sending the reference signal, the first device may use the first spatial filtering parameter corresponding to the reference signal to send the reference signal.
- the first spatial filtering parameter may be an analog precoding vector.
- the second information that is, the indication information of the K first spatial filtering parameters, may be the indication information of the K analog precoding vectors.
- the length of the vector m k is equal to the number of antenna elements in the antenna array of the first device.
- the length of the analog precoding vector m k is N 1 ⁇ N 2
- each element in the analog precoding vector m k is a complex number
- the magnitude of each element is The phase of each element corresponds to the phase value of the phase shifter connected to each antenna element.
- the second information may include values of K analog precoding vectors (m 0 , m 1 , . . . , m K-1 ), so as to directly indicate the K analog precoding vectors.
- any two columns in the observation matrix are linearly uncorrelated.
- the K analog precoding vectors may be indicated in the following manner: the first device and the second device both store predefined A random analog precoding codebook, the K analog precoding vectors configured by the first device to the second device correspond to K rows or K columns of the random analog precoding codebook, and the first device converts the K rows or K columns of the random analog precoding codebook.
- the index is sent to the second device to indicate the K analog precoding vectors.
- the second information may include K row indices or column indices in the analog precoding codebook; correspondingly, the K first spatial filtering parameters are the above K row indices or column indices in the simulation K analog precoding vectors indicated in the precoding codebook, where the predefined analog precoding codebook is preconfigured or configured by default.
- the third information is indication information of a channel sparse basis matrix of a channel between the first device and the second device. Since mmWave channels generally only exhibit sparse features in the angular domain, after processing the channel using the channel sparse features in the angular domain, it is necessary to use the channel sparse basis matrix to transform the angular domain channel back to a general spatial domain channel. Specifically, the channel sparse basis matrix is determined according to a discrete Fourier transform (discrete fourier transform, DFT) matrix corresponding to the size of the antenna array of the first device.
- DFT discrete Fourier transform
- the channel sparse basis matrix is a first discrete Fourier transform matrix, and the number of rows/columns of the first discrete Fourier transform matrix is the same as that of the uniform linear array.
- the number of arrays is the same; when the antenna array of the first device is a uniform planar array, the channel sparse matrix is the Kronecker product of the second discrete Fourier transform matrix and the third discrete Fourier transform matrix or the third discrete Kronecker product of the Fourier transform matrix and the second discrete Fourier transform matrix, the number of rows/columns of the second discrete Fourier transform matrix and the number of rows/ The number of columns is respectively the same as the number of antenna elements in the two dimensions of the uniform planar array.
- the channel sparse basis matrix D may be in the following form:
- the (i-1)N 2 +jth element in h represents the channel from the i-th row and j-th column of the antenna element to the receiving end
- the vector x is a sparse vector of N 1 N 2 length, representing the angle domain after DFT Since the millimeter-wave channel is sparse in the angle domain, the number of non-zero elements in x is very small, which is a sparse vector.
- channel sparse basis matrix D can also be in the following form:
- the (j-1)N 1 +ith element in h represents The equivalent channel from the i-th row and the j-th column of the antenna element to the receiving end, where x is the sparse vector representation of the corresponding channel h in the angle domain.
- the third information may directly indicate the channel sparse basis matrix, or may indirectly indicate the channel sparse basis matrix.
- the third information may directly indicate the value of each element in the channel sparse basis matrix in a predetermined order.
- the channel sparse basis matrix D may be indicated by the following method: the third information includes information on the size of the antenna array of the first device, that is, the first device uses the size of the antenna array of the first device (N 1 , N 2 ) is sent to the second device, the second device determines the sparse basis matrix D according to (N 1 , N 2 ) and formula (1) or (2), and (N 1 , N 2 ) represents the size of the antenna array For N 1 rows and N 2 columns.
- the second device needs to obtain the matrix product of the observation matrix M and the channel sparse basis matrix D, that is, the matrix MD, so the first device can also jointly indicate the observation matrix M and the channel.
- the sparse basis matrix D, that is, the matrix MD is directly indicated, and the two are not indicated separately.
- the configuration information may further include indication information of K PTRSs, the indication information of K PTRSs may be referred to as fourth information, and the fourth information may indicate time-frequency location information of K PTRSs, and/or K Information such as the reference signal resource index of the PTRS; a PTRS among the K PTRSs is transmitted in the same time unit as a reference signal among the K reference signals, wherein different reference signals are transmitted in different time units.
- K PTRSs are associated with K CSI-RSs, and the association relationship is that, for any CSI-RS, there is one PTRS and the CSI-RS in the same symbol.
- FIG. 4 it is assumed that CSI-RS1 to CSI-RS3 exist, which are sent in symbols 1 to 3 respectively; in the symbol where each CSI-RS is located, one PTRS is also sent at the same time.
- the first device can configure PTRS for the second device to suppress the effect of phase noise on different symbols when the following conditions are met: the first device has multiple transmit channels, and at least two transmit channels in the multiple transmit channels share a crystal oscillator of. This is because the phase noise is mainly caused by the unsatisfactory crystal oscillator. When the two transmit channels share the crystal oscillator, the signals sent by the two channels will experience the same phase noise, so it is possible to transmit PTRS on one transmit channel to the other. The phase of the CSI-RS of one channel is corrected.
- the K phase tracking reference signals may be sent through the same spatial filtering parameter, that is, the K phase tracking reference signals may correspond to the same spatial filtering parameter.
- the same spatial filtering parameter corresponding to the K phase tracking reference signals may be a first spatial filtering parameter among the K first spatial filtering parameters; or, the same spatial filtering parameter corresponding to the K phase tracking reference signals
- the filtering parameter may also be a spatial filtering parameter different from the K first spatial filtering parameters, that is, not any one of the K first spatial filtering parameters.
- the phase change on the PTRS received by the receiving end is only caused by phase noise, while the K reference signals are due to K different first spatial filtering parameters are used for transmission, and the phase change is caused by both the channel and the phase noise.
- the received PTRS to correct the phase of the reference signal, only the phase information caused by the channel in the received reference signal can be retained, Therefore, the subsequent channel estimation and beam training can be more accurate.
- the configuration information may further include fifth information, where the fifth information is used to indicate multiple second spatial filtering parameters.
- the second spatial filtering parameters may also be referred to as spatial filtering parameters available to the first device.
- the plurality of second spatial filtering parameters may be located in the set of available spatial filtering parameters.
- the fifth information may directly indicate multiple second spatial filtering parameters.
- the fifth information may directly indicate multiple candidate analog precoding vectors corresponding to the multiple second spatial filtering parameters. .
- a plurality of second spatial filtering parameters may be indirectly indicated by the fifth information, for example, indicating an available analog precoding matrix determined according to a set of available spatial filtering parameters.
- the available spatial filtering parameter set may be an available analog precoding matrix formed by a set of analog precoding vectors, for example, it may be an oversampled DFT obtained according to (N 1 , N 2 ) and the oversampling factor (O 1 , O 2 ) matrix, the DFT matrix can also be called the available beamforming matrix, the DFT matrix S can satisfy the following form:
- N 1 N 1 ⁇ N 1 -dimensional matrix representing an N 1 -dimensional DFT matrix under O 1 times oversampling
- O 2 N 2 ⁇ N 2 -dimensional matrix representing N 2 -dimensional DFT matrix under O 2 times oversampling
- N 1 -dimensional DFT matrix and N 2 -dimensional DFT matrices The following forms can be satisfied respectively:
- the available beamforming matrix S can also satisfy the following form:
- the available beamforming matrices under equations (3) and (4) correspond to the different channel expressions above, that is, the channel sparse basis matrix D represented by equation (1) corresponds to the available beamforming matrix represented by equation (3), and equation (2)
- the channel sparse basis matrix D represented by ) corresponds to the available beamforming matrix represented by equation (4).
- the available beamforming matrix may also be indicated in the following manner: the first device sends the antenna array size (N 1 , N 2 ) and the oversampling factor (O 1 , O 2 ) of the first device to the first device Second device, the second device determines the available beamforming matrix S according to formula (3) or (4).
- S303 The first device sends a reference signal to the second device.
- the first device may send K reference signals to the second device.
- the first device may send the K reference signals to the second device by using the configured K first spatial filtering parameters and the configured time-frequency positions of the K reference signals.
- the first device sends the K reference signals at the time-frequency positions corresponding to the K reference signals configured in S301 by using the first transmission channel.
- the first spatial filtering parameter used by the first device when sending the kth reference signal is consistent with the kth first spatial filtering parameter configured in S301.
- the analog precoding vector used by each antenna element when sending the kth reference signal is the kth analog precoding vector configured in S301.
- the first device uses the second transmission channel that shares the crystal oscillator with the first transmission channel to send K at the time-frequency positions corresponding to the K PTRS configured in S301.
- PTRS the spatial filtering parameters used when the second transmission channel sends the K PTRSs are fixed spatial filtering parameters, that is, the K PTRSs may be sent through the same spatial filtering parameters.
- the analog precoding vector used when sending K PTRSs through the second transmission channel is a fixed analog precoding vector.
- S304 The second device receives K reference signals from the first device.
- the first device when the first device is also configured with PTRS, the first device uses a spatial filtering parameter to send K PTRS at the time-frequency positions where the configured K PTRS are located, and the second device receives the K PTRS from the first device. PTRS.
- the second device receives and measures the K CSI-RSs at the time-frequency positions associated with the K reference signals configured by the first device, and normalizes the received reference signals according to the predefined baseband signals to obtain the received reference signals:
- y [y 0 , y 1 ,...,y K-1 ] H .
- the second device may further perform phase correction on the phase of the received CSI-RS according to the received PTRS. That is, the second device may calibrate the phases of the K received measured values of the K reference signals according to the measured values of the K PTRSs.
- the specific calibration process is not limited in this application, and will not be repeated here.
- the second device may estimate the channel according to the K received measured values of the K received reference signals and the K first spatial filtering parameters, and the channel sparse basis matrix D to obtain the estimated value of the channel Among them, the estimated value of the channel is the estimated value after quantizing the amplitude and phase of the elements in the matrix corresponding to the channel, and the estimated value of the channel is a vector with multiple elements.
- the estimated value of the angle domain channel may be determined according to the K received measurement values of the K reference signals, the K first spatial domain filtering parameters, and the channel sparse basis matrix Then determine the estimated value of the channel according to the estimated value of the channel in the angle domain
- the estimation of the angle domain channel by the second device is equivalent to solving the following formula:
- ⁇ is a preset value, and the preset value may be an allowable difference between the received signal y and the estimated received signal MDx, which may be configured by default or configured by the first device.
- 2 ⁇ means Subject to the condition
- x is the sparse vector representation of the corresponding channel h in the angle domain.
- the second device can solve the above problems by adopting traditional compressed sensing recovery algorithms, such as matching pursuits (MP) algorithm, orthogonal matching pursuit (OMP) algorithm, or approximate message passing (AMP) Algorithm, this application does not limit the specific algorithm adopted by the second device.
- MP matching pursuits
- OMP orthogonal matching pursuit
- AMP approximate message passing
- the second device may send channel state indication information to the first device.
- S305 The second device sends channel state indication information to the first device.
- S306 The first device receives the channel state indication information reported by the second device.
- the channel state indication information is determined according to the K received measurement values of the K reference signals, the K first spatial filtering parameters, and the channel sparse basis matrix.
- the channel state indication information may exist in at least the following two situations:
- the channel state indication information may include at least one second spatial filtering parameter or an index of the at least one second spatial filtering parameter among the plurality of second spatial filtering parameters;
- the channel state indication information includes at least one second spatial filtering parameter or an index of at least one second spatial filtering parameter in the plurality of second spatial filtering parameters, and the channel corresponding to the at least one second spatial filtering parameter Gain quantization value.
- the at least one second spatial filtering parameter is one of multiple second spatial filtering parameters indicated by the fifth information; the channel gain quantization value corresponding to the at least one second spatial filtering parameter is based on the K
- the K received measurement values of the reference signal, the K spatial filtering parameters, and the channel sparse basis matrix are determined.
- the second device may determine the optimal at least one spatial filtering parameter according to the estimated value of the channel and the available spatial filtering parameter set.
- a plurality of second spatial filtering parameters configured by the first device for the second device may constitute an available beamforming matrix S, and the second device obtains the estimated equivalent channel gain under each available beamforming vector as The second device determines from c at least one element with the largest element amplitude value, thereby indicating at least one second spatial filtering parameter corresponding to the at least one element with the largest element amplitude value through the channel state indication information.
- the second device may report an index corresponding to at least one element in c with the largest element magnitude value.
- the second device may also report the amplitude of at least one element in c with the largest element amplitude value.
- the first device may determine at least one second spatial filtering parameter according to the channel state indication information. Since each second spatial filtering parameter may correspond to one beam direction, that is, corresponding to one data transmission direction, the first device may use at least one beam direction corresponding to at least one second spatial filtering parameter as the data transmission beam direction.
- the channel state indication information includes an estimated value of the channel The quantized value and the estimated value of the angle domain channel At least one of the quantized values.
- the quantized value which can include an estimate of the channel Amplitude value quantization and angle value quantization of each element in , or quantization of real and imaginary parts.
- the estimated value of the channel which can include an estimate of the channel The magnitude and phase of at least one element in the quantized value, or the estimated value of the channel The quantized value of the real and imaginary parts of at least one element in .
- Estimated value of the angle domain channel which can include an estimate of the angle-domain channel Amplitude value quantization and angle value quantization of each element in , or quantization of real and imaginary parts.
- the estimated value of the angle domain channel which can include an estimate of the angle-domain channel The magnitude and phase of at least one element in the quantized value, or the estimated value of the angle domain channel The quantized value of the real and imaginary parts of at least one element in .
- the estimated value of the angle domain channel The quantized value can also include the estimated value of the angle domain channel The estimated value of the at least one element of the channel in the angle domain index in .
- the estimated value of the angle domain channel At least one element in , which can be an estimate of the angle domain channel The element with the largest magnitude.
- Estimated value of the angle domain channel The number of elements to be reported in may be predefined, or may be configured by the first device.
- the first device after the first device obtains the channel state indication information, it can obtain the estimated value of the channel or an estimate of the angle-domain channel Since the first device can determine multiple second spatial filtering parameters available to itself, that is, the beamforming matrix S, the first device can obtain the estimated value of the equivalent channel gain under each available beamforming vector as The second device determines from c at least one element with the largest element magnitude value.
- the first device may determine, from the plurality of second spatial filtering parameters, at least one second spatial filtering parameter corresponding to at least one element with the largest element amplitude value, so that the first device may determine at least one second spatial filtering parameter corresponding to the at least one second spatial filtering parameter.
- a beam direction as the beam direction for data transmission.
- the essence of the beam training process is the process of measuring the channel at various angles.
- the millimeter-wave channel is sparse in the angular domain, that is, the path between the transceiver ends only appears in individual angular directions.
- this application conducts a small amount of measurements on the sparse millimeter-wave channel in the angular domain (corresponding to The observation or sampling concept in compressed sensing), multiple measurements form an observation matrix, and the channel can be recovered with relatively high accuracy.
- the observation matrix needs to satisfy any two columns that are linearly uncorrelated to ensure better recovery performance.
- some precoding vector codes need to be predefined to satisfy this condition.
- the millimeter-wave channel only exhibits sparse characteristics in the angular domain, so this application needs to estimate the channel in the angular domain, but in practice, the channel can only be measured in the spatial domain (that is, the channel on each antenna). Signal received value), so this application needs to use a sparse basis matrix to change the angle domain channel to the space domain and compare it with the actual received signal.
- the receiving end needs to use the specific values of the observation matrix and the sparse basis matrix when recovering the sparse angle domain channel, so it is necessary to configure the relevant information to the receiving end.
- the configuration information also includes the reference signal sent by the transmitting end device (ie, the first device).
- the transmitter sends a small amount of reference signals
- the receiver device ie, the second device
- the reference signal overhead and time overhead of beam training are reduced.
- the transmitting end device when the antenna array of the transmitting end device includes N 1 N 2 antennas and there are N 1 N 2 transmit beamforming vectors available to the transmitting end, theoretically, the transmitting end device needs to send N 1 N 2 reference signals to Measure the quality of all beams to complete the beam training process.
- this scheme takes advantage of the sparse characteristics of millimeter-wave channels in the angular domain, and using the compressed sensing algorithm, the transmitting end device only needs to send a small amount of reference signals to estimate the channel and complete beam training.
- the present application also proposes a reference signal configuration method and transmission method for joint configuration of CSI-RS and PTRS, so that phase noise on different symbols during beam training can be eliminated and the accuracy of beam training can be improved.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- one reference signal is carried by one subband in the frequency domain (for example, the subband may be one subcarrier).
- the embodiments of the present application can also be applied to beam training by using a broadband reference signal.
- the broadband reference signal is composed of reference signals located in multiple subbands in the frequency domain, and the frequency interval of any two adjacent subbands in the frequency domain is the same, as shown in FIG. 5 , which is a broadband reference signal provided by this embodiment of the application.
- Signal schematic As shown in FIG. 5 , assuming that the reference signal is a CSI-RS, in FIG.
- three CSI-RS1s are used as an example to illustrate, which are CSI-RS1 to CSI-RS3 respectively, and are sent in symbols 1 to 3 respectively; each CSI -In the symbol where the RS is located, a PTRS is also sent at the same time.
- Each CSI-RS is composed of reference signals located in three subbands, and the three subbands are subband 1, subband 6, and subband 11, respectively.
- the wideband reference signal is taken as an example of wideband CSI-RS for description.
- Step 1 the first device sends configuration information to the second device.
- Step 2 the second device receives configuration information from the first device.
- the configuration information includes indication information of the K wideband CSI-RSs, indication information of the K first spatial filtering parameters corresponding to the K wideband CSI-RSs, and indication information of the channel sparse base matrix D.
- the indication information of the K wideband CSI-RSs may include time-frequency location information of the K wideband CSI-RSs, and reference signal resource indices of the K wideband CSI-RSs, and the K wideband CSI-RSs are located in different time units (for example, an OFDM symbol), each of the K wideband CSI-RSs is composed of multiple subband CSI-RSs in the frequency domain, and any two adjacent subband CSI-RSs in the frequency domain The frequency spacing is the same.
- the related contents of the indication information of the K first spatial filtering parameters and the indication information of the channel sparse basis matrix D are the same as those described in the first embodiment.
- the configuration information sent by the first device to the second device may also include fourth information, where the fourth information is the indication information of the K PTRSs, where the indication information of the K PTRSs may include the time-frequency positions of the K PTRSs.
- the K PTRSs are associated with the K wideband CSI-RSs, and the association relationship is that, for any wideband CSI-RS, there is one PTRS in the same symbol as the wideband CSI-RS Inside.
- the first device can configure PTRS for the second device to suppress the effect of phase noise on different symbols when the following conditions are met: the first device has multiple transmit channels, and at least two transmit channels in the multiple transmit channels share a crystal oscillator of.
- the K phase tracking reference signals may be sent through the same spatial filtering parameter, that is, the K phase tracking reference signals may correspond to the same spatial filtering parameter.
- the K phase tracking reference signals when sent through the same spatial filtering parameter, when considering the channel stability, the phase change on the PTRS received by the receiving end is only caused by phase noise, while the K reference signals are due to K different first spatial filtering parameters are used for transmission, and the phase change is caused by both the channel and the phase noise.
- the received PTRS to correct the phase of the reference signal, only the phase information caused by the channel in the received reference signal can be retained, Therefore, the subsequent channel estimation and beam training can be more accurate.
- the configuration information sent by the first device to the second device may further include indication information of a set of spatial filtering parameters available to the first device, that is, fifth information indicating multiple second spatial filtering parameters.
- the related content of the fifth information and the indication information of the available spatial filtering parameter set is the same as that of the first embodiment, and the specific content can refer to the relevant description in the first embodiment, and details are not repeated here.
- Step 3 the first device sends a reference signal to the second device.
- the first device may send K wideband CSI-RSs to the second device.
- the first device may send the K wideband CSI-RSs to the second device by using the configured K first spatial filtering parameters and the configured time-frequency positions of the K reference signals.
- the first device transmits the K wideband CSI-RSs at the time-frequency positions corresponding to the K wideband CSI-RSs configured in step 1 by using the first transmission channel.
- the first spatial filtering parameter used by the first device when sending the k th wideband CSI-RS is consistent with the k th first spatial filtering parameter configured in step 1.
- the analog precoding vector used by each antenna element when sending the kth wideband CSI-RS is the kth analog precoding vector configured in step 1.
- the first device uses the second transmission channel that shares the crystal oscillator with the first transmission channel at the time-frequency position corresponding to the K PTRS configured in step 1.
- the spatial filtering parameters used when the second transmission channel sends the K PTRSs are fixed spatial filtering parameters, that is, the K PTRSs may be sent through the same spatial filtering parameters.
- the analog precoding vector used when sending K PTRSs through the second transmission channel is a fixed analog precoding vector.
- Step 4 the second device receives the reference signal. Specifically, the second device may receive K wideband CSI-RSs from the second device.
- the first device when the first device is also configured with PTRS, the first device uses a spatial filtering parameter to send K PTRS at the time-frequency positions where the configured K PTRS are located, and the second device receives the K PTRS from the first device. PTRS.
- the second device transforms the received reference signal from the frequency domain to the delay domain, and can obtain:
- the millimeter-wave channel is also sparse in the delay domain (corresponding to different multipath delays)
- converting the above reference signal into the delay domain is equivalent to jointly observing the channel in the angle domain and the delay domain, so that the channel more sparse. Since the compressed sensing algorithm is given the number of observations, the sparser the original signal, the higher the recovery accuracy, so the channel recovery accuracy can be improved after the above transformation.
- the second device may further perform phase correction on the phase of the received CSI-RS according to the received PTRS.
- the specific calibration process is not limited in the present application, and will not be repeated here.
- Estimating the channel by the second device is equivalent to solving the following optimization problem at each delay index f to estimate the estimated value of the angle domain channel under the (f+1)th snapshot in the delay domain Satisfy the following forms:
- ⁇ is a preset value, for example, it may be an allowable difference between the received signal z f and the estimated received signal MDx, which may be configured by default or configured by the first device.
- the second device can adopt the traditional compressed sensing recovery algorithm to solve the above problem. When the second device solves the above problem, it obtains the estimated value of the sparse vector of the channel in the angle domain for each snapshot After that, the estimated value of each snapshot channel can be obtained
- the received signal Z [z 0 ,z 1 ,...,z F-1 ] will also be captured by a few snapshots, so the second device can The signal Z selects the snapshot index set F that contains most of the energy, namely The largest at least one index f.
- the above optimization problem is then solved only for the snapshot indices within F.
- Step 4 The second device reports based on the estimated channel, and sends channel state indication information to the first device.
- the reported channel state indication information includes two implementation manners, implementation manner 1: the second device reports the estimated value of the channel under each snapshot , such as direct channel estimates Report after quantification, where quantification includes estimated values The amplitude value quantization and angle value quantization of each element in the In this case, the corresponding snapshot index f can be additionally reported.
- the channel state indication information may include an estimated value of the channel The quantized value and the estimated value of the angle domain channel At least one of the quantized values.
- the channel state indication information includes the estimated value of the channel When quantizing the value, you can include the estimated value of the channel Amplitude value quantization and angle value quantization of each element in , or quantization of real and imaginary parts.
- the estimated value of the channel The quantized value which can include an estimate of the channel The magnitude and phase of at least one element in the quantized value, or the estimated value of the channel The quantized value of the real and imaginary parts of at least one element in .
- the number of indexes included in the snapshot index set F may be predefined or configured by the sending end device.
- the channel state indication information includes the estimated value of the angle domain channel
- the second device may also capture the estimated value of the sparse vector of the channel in the angle domain for each snapshot Report after quantification, report Only the amplitude quantization value and phase quantization value of several element values with the largest amplitude may be reported.
- the number of elements to be reported in can be predefined or configured by the sender device.
- the estimated value of the angle domain channel The quantized value which can include an estimate of the angle-domain channel Amplitude value quantization and angle value quantization of each element in , or quantization of real and imaginary parts.
- the estimated value of the angle domain channel The quantized value which can include an estimate of the angle-domain channel The magnitude and phase of at least one element in the quantized value, or the estimated value of the angle domain channel The quantized value of the real and imaginary parts of at least one element in .
- the estimated value of the angle domain channel The quantized value can also include the estimated value of the angle domain channel The estimated value of the at least one element of the channel in the angle domain index in .
- the estimated value of the angle domain channel At least one element in , which can be an estimate of the angle domain channel The element with the largest magnitude.
- Estimated value of the angle domain channel The number of elements to be reported in may be predefined, or may be configured by the first device.
- the second device may also only report the snapshot index set F In this case, the corresponding snapshot index f can be additionally reported.
- Implementation mode 2 If the first device configures the second device with a set of spatial filtering parameters available to the first device, the second device can determine the optimal at least one second spatial filtering parameter according to the channel estimation value and the set of available spatial filtering parameters escalate.
- a plurality of second spatial filtering parameters configured by the first device for the second device can form an available analog precoding matrix S, then the equivalent channel gain obtained by the second device for each snapshot under each available analog precoding vector is: Then the f of the equivalent channel under each snapshot is added to obtain the total energy gain of the equivalent channel under each available analog precoding vector, which satisfies the following form, where represents the row vector corresponding to cf, and I represents the identity matrix.
- the second device may report an index corresponding to at least one element with the largest element magnitude value in 1.
- the second device may also report the amplitude of at least one element with the largest element amplitude value in 1.
- the number of reported element indices may be predefined or configured by the sender device.
- the channel state indication information may exist in at least the following two situations:
- the channel state indication information may include at least one second spatial filtering parameter or an index of the at least one second spatial filtering parameter among the plurality of second spatial filtering parameters;
- the channel state indication information includes at least one second spatial filtering parameter or an index of at least one second spatial filtering parameter in the plurality of second spatial filtering parameters, and the channel corresponding to the at least one second spatial filtering parameter Gain quantization value.
- the at least one second spatial filtering parameter is one of multiple second spatial filtering parameters indicated by the fifth information; the channel gain quantization value corresponding to the at least one second spatial filtering parameter is based on the K
- the K received measurement values of the reference signal, the K spatial filtering parameters, and the channel sparse basis matrix are determined.
- the broadband reference signal is used to provide additional time delay domain information for the beam training process, and the channel is converted to the delay domain and then estimated to make the channel more sparse in the angle domain, thereby improving channel estimation and beam efficiency. training performance.
- the configuration information also includes the spatial filtering parameters of the reference signal sent by the transmitting end device and the channel sparse basis matrix. Indication information, and indication information of the available spatial filtering parameter set of the transmitting end device.
- the transmitting end sends a small amount of reference signals, and the receiving end device can complete the channel estimation based on the configuration information and the compressed sensing recovery algorithm, and then determine the best transmit beam based on the estimated channel, reducing the reference signal for beam training. overhead and time overhead.
- a reference signal configuration method and transmission method for joint configuration of CSI-RS and PTRS are proposed, so that phase noise on different symbols during beam training can be eliminated and the accuracy of beam training can be improved.
- the scheme is extended to wideband reference signals and optimized, and the performance of channel estimation and beam training is improved by using additional delay domain information.
- Wi-Fi wireless fidelity
- WiMax wireless fidelity
- 3GPP 3rd generation partnership project
- the first device, the second device, or the above communication apparatus may include a hardware structure and/or a software module, and a hardware structure, a software module, or a hardware structure plus a software module form to achieve the above functions. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
- each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module.
- the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
- an embodiment of the present application further provides an apparatus 600 .
- the communication apparatus 600 may be the terminal device 1, the terminal device 2, or the network device in FIG. 2, and is used to implement the method for the second device in the above method embodiments, and may also be used to implement the method corresponding to the first device in the above method embodiments.
- a device method For specific functions, refer to the descriptions in the foregoing method embodiments.
- the apparatus 600 may include: a processing unit 601 and a communication unit 602 .
- the communication unit may also be referred to as a transceiver unit, and may include a sending unit and/or a receiving unit, respectively configured to perform the sending and receiving steps of the first device or the second device in the above method embodiments.
- the communication apparatus provided by the embodiments of the present application will be described in detail with reference to FIG. 6 to FIG. 7 .
- the behavior and function of the second device in the above method embodiment may be implemented by the communication apparatus 600, for example, to implement the method performed by the second device in the embodiment shown in FIG. 3 .
- the communication apparatus 600 may be a terminal device, or a component (such as a chip or circuit) applied in the terminal device, or a chip or a chip set in the terminal device or a part of the chip for performing related method functions.
- the communication unit 602 may be configured to perform the receiving or sending operation performed by the second device in the embodiment shown in FIG. 3
- the processing unit 601 may be configured to perform the operation performed by the second device in the embodiment shown in FIG. 3 . Operations other than sending and receiving operations.
- the communication unit is configured to receive configuration information from the first device, where the configuration information includes first information, second information and third information; the first information is indication information of the K reference signals, and the first information is The second information is the indication information of the K first spatial filtering parameters corresponding to the K reference signals, and the third information is the indication information of the channel sparse basis matrix of the channel between the first device and the second device; K is an integer greater than 1 ; Receive K reference signals from the first device;
- a processing unit configured to determine the channel state indication information according to the K received measurement values of the K reference signals, the K first spatial filtering parameters and the channel sparse basis matrix;
- a communication unit configured to send channel state indication information to the first device.
- the behavior and function of the first device in the above method embodiment may be implemented by the communication apparatus 600, for example, to implement the method performed by the first device in the embodiment shown in FIG. 3 .
- the communication apparatus 600 may be a terminal device, or a component (such as a chip or circuit) applied in the terminal device, or a chip or a chipset in the terminal device or a part of the chip for performing related method functions.
- the communication unit 602 may be configured to perform the receiving or sending operation performed by the first device in the embodiment shown in FIG. 3
- the processing unit 601 may be configured to perform the operation performed by the first device in the embodiment shown in FIG. 3 . Operations other than sending and receiving operations.
- the processing unit is configured to send configuration information to the second device through the communication unit, where the configuration information includes first information, second information and third information; the first information indicates K reference signals, the second The information indicates K first spatial filtering parameters corresponding to the K reference signals, and the third information indicates the channel sparse basis matrix of the channel between the first device and the second device; sending the K reference signals to the second device;
- the processing unit is configured to receive, through the communication unit, channel state indication information from the second device, where the channel state indication information is based on the K received measurement values of the K reference signals, the K first spatial filtering parameters, and the channel sparse basis matrix.
- a communication unit may also be referred to as a transceiver, transceiver, transceiver, 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 communication unit 602 may be regarded as a receiving unit, and the device for implementing the sending function in the communication unit 602 may be regarded as a transmitting unit, that is, the communication unit 602 includes a receiving unit and a transmitting unit.
- a communication unit may also sometimes be referred to as a transceiver, transceiver, or transceiver circuit, or the like.
- 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.
- processing unit 601 and the communication unit 602 may also perform other functions.
- processing unit 601 and the communication unit 602 may also perform other functions.
- FIG. 7 shows an apparatus 700 provided by an embodiment of the present application, and the apparatus shown in FIG. 7 may be an implementation manner of a hardware circuit of the apparatus shown in FIG. 6 .
- the communication apparatus can be applied to the flow chart shown above to perform the functions of the first device or the second device in the above method embodiments. For convenience of description, FIG. 7 only shows the main components of the communication device.
- the communication apparatus 700 includes a processor 710 and an interface circuit 720 .
- the processor 710 and the interface circuit 720 are coupled to each other.
- the interface circuit 720 can be a transceiver or an input-output interface.
- the communication apparatus 700 may further include a memory 730 for storing instructions executed by the processor 710 or input data required by the processor 710 to execute the instructions or data generated after the processor 710 executes the instructions.
- the processor 710 is used to implement the function of the above-mentioned processing unit 601
- the interface circuit 720 is used to implement the function of the above-mentioned communication unit 602 .
- the terminal device chip When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments.
- the terminal device chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device, and the information is sent by the access network device to the terminal device; or, the terminal device chip sends information to other modules (such as radio frequency) in the terminal device. module or antenna) to send information, the information is sent by the terminal equipment to the access network equipment.
- modules such as radio frequency modules or antennas
- the access network device chip When the above communication device is a chip applied to an access network device, the access network device chip implements the functions of the network device in the above method embodiments.
- the access network device chip receives information from other modules (such as radio frequency modules or antennas) in the access network device, and the information is sent by the terminal device to the network device; or, the access network device chip sends information to the access network device.
- the other modules (such as radio frequency modules or antennas) of the device send information, and the information is sent by the access network equipment to the terminal equipment.
- An embodiment of the present application provides a network device, and the network device has a function of implementing the behavior of the network device in any of the foregoing method embodiments.
- the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to each sub-function of the above-mentioned functions.
- the network device may be a core network device, and the network device may also be a third-party service device.
- An embodiment of the present application provides a terminal device, and the terminal device has a function of implementing the behavior of the terminal device in any of the foregoing method embodiments.
- the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
- the hardware or software includes one or more modules corresponding to each sub-function of the above-mentioned functions.
- the terminal device may be user equipment (mobile phone, tablet computer, portable computer, smart wearable device, smart car, Tx UE, Rx UE, etc.).
- An embodiment of the present application further provides a communication system, where the system includes the first device and the second device described in any of the foregoing embodiments.
- Embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements a method process related to the first device in any of the above method embodiments.
- the computer may be the above-mentioned first device.
- Embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, implements the method process related to the second device in any of the above method embodiments.
- the computer may be the above-mentioned second device.
- the embodiments of the present application also provide a computer program or a computer program product including a computer program, and when the computer program is executed on a computer, the computer program will enable the computer to implement any of the above method embodiments and the first method.
- Device-related method flow Specifically, the computer may be the above-mentioned first device.
- the embodiments of the present application also provide a computer program or a computer program product including the computer program, when the computer program is executed on a certain computer, the computer program will enable the computer to implement any of the above method embodiments and the second Device-related method flow.
- the computer may be the above-mentioned second device.
- An embodiment of the present application further provides a chip, including: a processing module and a communication interface, where the processing module can execute the method flow related to the first device in any of the above method embodiments.
- the chip further includes a storage module (eg, memory), the storage module is used for storing instructions, the processing module is used for executing the instructions stored in the storage module, and the instructions stored in the storage module are The execution causes the processing module to execute the method flow related to the first device in any of the above method embodiments.
- An embodiment of the present application further provides a chip, including: a processing module and a communication interface, where the processing module can execute the method flow related to the first device in any of the above method embodiments.
- the chip further includes a storage module (eg, memory), the storage module is used for storing instructions, the processing module is used for executing the instructions stored in the storage module, and the instructions stored in the storage module are The execution causes the processing module to execute the method process related to the second device in any of the above method embodiments.
- processors mentioned in the embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuits ( Application Specific Integrated Circuit, ASIC), off-the-shelf Programmable Gate Array (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 a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). 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 Static RAM
- DRAM Dynamic RAM
- SDRAM Synchronous DRAM
- SDRAM double data rate synchronous dynamic random access memory
- Double Data Rate SDRAM DDR SDRAM
- enhanced SDRAM ESDRAM
- synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
- Direct Rambus RAM Direct Rambus RAM
- memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
- 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, a network device or a terminal device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
- the apparatus may include any number of transmitters, receivers, processors, memories, etc., to implement the functions or operations performed by the apparatus in each apparatus embodiment of the present application.
- the words “if” or “if” as used herein may be interpreted as “at” or “when” or “in response to determining” or “in response to detecting.”
- the phrases “if determined” or “if detected (the stated condition or event)” can be interpreted as “when determined” or “in response to determining” or “when detected (the stated condition or event),” depending on the context )” or “in response to detection (a stated condition or event)”.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (27)
- 一种通信方法,其特征在于,包括:接收来自第一设备的配置信息,所述配置信息包括第一信息,第二信息以及第三信息;所述第一信息为K个参考信号的指示信息,所述第二信息为与所述K个参考信号对应的K个第一空域滤波参数的指示信息,所述第三信息为第一设备与第二设备之间信道的信道稀疏基矩阵的指示信息;K为大于1的整数;接收来自所述第一设备的所述K个参考信号;向所述第一设备发送信道状态指示信息,所述信道状态指示信息根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定。
- 根据权利要求1所述的方法,其特征在于,所述K个参考信号中的一个参考信号与所述K个第一空域滤波参数中的一个第一空域滤波参数存在对应关系。
- 根据权利要求2所述的方法,其特征在于,所述第二信息包括模拟预编码码本中的K个行索引或列索引;所述K个行索引或列索引指示所述模拟预编码码本中的K个模拟预编码矢量;所述K个第一空域滤波参数为所述第二信息指示的所述K个模拟预编码矢量;所述模拟预编码码本为预配置的或默认配置的。
- 根据权利要求1至3任一所述的方法,其特征在于,所述第三信息包含所述第一设备的天线阵列尺寸,所述信道稀疏基矩阵是根据与所述第一设备的天线阵列尺寸对应的离散傅里叶变换矩阵确定的。
- 根据权利要求1至4任一所述的方法,其特征在于,所述配置信息还包括第四信息,所述第四信息为K个相位追踪参考信号的指示信息;所述K个相位追踪参考信号中的一个相位追踪参考信号,与所述K个参考信号中的一个参考信号在同一个时间单元内传输。
- 根据权利要求5所述的方法,其特征在于,所述方法还包括:接收来自所述第一设备的K个相位追踪参考信号;所述K个相位追踪参考信号是通过同一个空域滤波参数发送的;其中,所述一个空域滤波参数为所述K个第一空域滤波参数中的一个空域滤波参数;或者,所述一个空域滤波参数为与所述K个第一空域滤波参数不同的空域滤波参数。
- 根据权利要求1至6任一所述的方法,其特征在于,所述信道状态指示信息包括角度域信道的估计值量化后的值,所述角度域信道的估计值根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定,所述角度域信道的估计值量化后的值包括对所述角度域信道的估计值中的至少一个元素的幅度和相位进行量化后的值,或者包括对所述角度域信道的估计值中的至少一个元素的实部和虚部进行量化后的值;或,所述信道状态指示信息包括信道的估计值量化后的值,所述信道的估计值根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定,所述信道的估计值量化后的值包括对所述信道的估计值中的至少一个元素的幅度和相位进行量化后的值,或者包括对所述信道的估计值中的至少一个元素的实部和虚部进行量化后的值。
- 根据权利要求7所述的方法,其特征在于,所述信道状态指示信息还包括以下至少 一项信息:所述角度域信道的估计值中的所述至少一个元素在所述角度域信道的估计值中的索引;信道的快拍索引。
- 根据权利要求1至6任一所述的方法,其特征在于,所述配置信息还包括第五信息,所述第五信息用于指示多个第二空域滤波参数。
- 根据权利要求10所述的方法,其特征在于,所述信道状态指示信息包括所述多个第二空域滤波参数中的至少一个第二空域滤波参数或所述至少一个第二空域滤波参数在所述多个第二空域滤波参数中的索引;或者,所述信道状态指示信息包括所述多个第二空域滤波参数中的至少一个第二空域滤波参数或所述至少一个第二空域滤波参数在所述多个第二空域滤波参数中的索引,和所述至少一个第二空域滤波参数对应的信道增益量化值;其中,所述至少一个第二空域滤波参数和所述至少一个第二空域滤波参数对应的信道增益量化值是根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定。
- 一种通信方法,其特征在于,包括:向第二设备发送配置信息,所述配置信息包括第一信息,第二信息以及第三信息;所述第一信息指示K个参考信号,所述第二信息指示与所述K个参考信号对应的K个第一空域滤波参数,所述第三信息指示第一设备与第二设备之间信道的信道稀疏基矩阵;向所述第二设备发送所述K个参考信号;接收来自所述第二设备的信道状态指示信息,所述信道状态指示信息根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵。
- 根据权利要求12所述的方法,其特征在于,所述向所述第二设备发送所述K个参考信号,包括:采用所述K个第一空域滤波参数中的一个第一空域滤波参数发送所述K个参考信号中的一个参考信号。
- 根据权利要求13所述的方法,其特征在于,所述第二信息包括模拟预编码码本中的K个行索引或列索引;所述K个行索引或列索引指示所述模拟预编码码本中的K个模拟预编码矢量;所述K个第一空域滤波参数为所述第二信息指示的所述K个模拟预编码矢量;所述模拟预编码码本为预配置的或默认配置的。
- 根据权利要求12至14任一所述的方法,其特征在于,所述第三信息包含所述第一设备的天线阵列尺寸,所述信道稀疏基矩阵是根据与所述第一设备的天线阵列尺寸对应的离散傅里叶变换矩阵确定的。
- 根据权利要求12至15任一所述的方法,其特征在于,所述配置信息还包括第四信息,所述第四信息为K个相位追踪参考信号的指示信息;所述K个相位追踪参考信号中的一个相位追踪参考信号,与所述K个参考信号中的一个参考信号在同一个时间单元内传输。
- 根据权利要求16所述的方法,其特征在于,所述方法还包括:通过同一个空域滤波参数向所述第二设备发送K个相位追踪参考信号;其中,所述一个空域滤波参数为所述K个第一空域滤波参数中的一个空域滤波参数;或者,所述一个空域滤波参数为与所述K个第一空域滤波参数不同的空域滤波参数。
- 根据权利要求12至17任一所述的方法,其特征在于,所述信道状态指示信息包括角度域信道的估计值量化后的值,所述角度域信道的估计值根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定,所述角度域信道的估计值量化后的值包括对所述角度域信道的估计值中的至少一个元素的幅度和相位进行量化后的值,或者包括对所述角度域信道的估计值中的至少一个元素的实部和虚部进行量化后的值;或,所述信道状态指示信息包括信道的估计值量化后的值,所述信道的估计值根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定,所述信道的估计值量化后的值包括对所述信道的估计值中的至少一个元素的幅度和相位进行量化后的值,或者包括对所述信道的估计值中的至少一个元素的实部和虚部进行量化后的值。
- 根据权利要求18所述的方法,其特征在于,所述信道状态指示信息还包括以下至少一项信息:所述角度域信道的估计值中的所述至少一个元素在所述角度域信道的估计值中的索引;信道的快拍索引。
- 根据权利要求12至20任一所述的方法,其特征在于,所述配置信息还包括第五信息,所述第五信息用于指示多个第二空域滤波参数。
- 根据权利要求21所述的方法,其特征在于,所述信道状态指示信息包括所述多个第二空域滤波参数中的至少一个第二空域滤波参数或所述至少一个第二空域滤波参数在所述多个第二空域滤波参数中的索引;或者,所述信道状态指示信息包括所述多个第二空域滤波参数中的至少一个第二空域滤波参数或所述至少一个第二空域滤波参数在所述多个第二空域滤波参数中的索引,和所述至少一个第二空域滤波参数对应的信道增益量化值;其中,所述至少一个第二空域滤波参数和所述至少一个第二空域滤波参数对应的信道增益量化值是根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定。
- 一种通信装置,其特征在于,包括:通信单元,用于接收来自第一设备的配置信息,所述配置信息包括第一信息,第二信息以及第三信息;所述第一信息为K个参考信号的指示信息,所述第二信息为与所述K个参考信号对应的K个第一空域滤波参数的指示信息,所述第三信息为第一设备与第二设备之间信道的信道稀疏基矩阵的指示信息;K为大于1的整数;接收来自所述第一设备的所述K个参考信号;处理单元,用于根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵确定信道状态指示信息;所述通信单元,用于向所述第一设备发送所述信道状态指示信息。
- 一种通信装置,其特征在于,包括:处理单元,用于通过通信单元向第二设备发送配置信息,所述配置信息包括第一信息,第二信息以及第三信息;所述第一信息指示K个参考信号,所述第二信息指示与所述K个参考信号对应的K个第一空域滤波参数,所述第三信息指示第一设备与第二设备之间信道的信道稀疏基矩阵;向所述第二设备发送所述K个参考信号;所述处理单元,用于通过所述通信单元接收来自所述第二设备的信道状态指示信息,所述信道状态指示信息根据所述K个参考信号的K个接收测量值、所述K个第一空域滤波参数以及所述信道稀疏基矩阵。
- 一种通信装置,其特征在于,包括处理器和存储器;所述处理器,用于执行所述存储器中存储的计算机程序或指令,使得所述通信装置实现权利要求1至11中任意一项所述的方法,或者使得所述通信装置实现权利要求12至22中任意一项所述的方法。
- 一种计算机可读存储介质,其特征在于,存储有计算机程序或指令,当所述计算机程序或指令在计算机上运行时,使得所述计算机实现如权利要求1至11中任意一项所述的方法,或者使得所述计算机实现如权利要求12至22中任意一项所述的方法。
- 一种计算机程序产品,其特征在于,包括计算机程序或指令,当所述计算机程序或指令在计算机上运行时,使得所述计算机实现如权利要求1至11中任意一项所述的方法,或者使得所述计算机实现如权利要求12至22中任意一项所述的方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21922553.9A EP4266616A4 (en) | 2021-01-27 | 2021-12-09 | COMMUNICATION METHOD AND DEVICE |
US18/263,108 US20240088953A1 (en) | 2021-01-27 | 2021-12-09 | Communication method and apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110112579.0 | 2021-01-27 | ||
CN202110112579 | 2021-01-27 | ||
CN202110544164.0A CN114826522B (zh) | 2021-01-27 | 2021-05-19 | 一种通信方法及装置 |
CN202110544164.0 | 2021-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022160963A1 true WO2022160963A1 (zh) | 2022-08-04 |
Family
ID=82525469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/136655 WO2022160963A1 (zh) | 2021-01-27 | 2021-12-09 | 一种通信方法及装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240088953A1 (zh) |
EP (1) | EP4266616A4 (zh) |
CN (1) | CN114826522B (zh) |
WO (1) | WO2022160963A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024136703A1 (en) * | 2022-12-20 | 2024-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for beam tracking |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4160943A4 (en) * | 2020-06-01 | 2024-03-13 | LG Electronics, Inc. | FREQUENCY GRADIENT METASURFACE DEVICE AND METHOD BASED ON FAST BEAM STEERING SYSTEM |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105981320A (zh) * | 2014-02-19 | 2016-09-28 | 华为技术有限公司 | 一种信道状态信息反馈方法、装置、用户设备及基站 |
CN108540995A (zh) * | 2017-03-03 | 2018-09-14 | 维沃移动通信有限公司 | 一种信道状态检测方法、网络设备及用户设备 |
CN109644029A (zh) * | 2016-08-10 | 2019-04-16 | Idac控股公司 | 用于大规模天线***中的信道状态信息报告的方法 |
US20190379483A1 (en) * | 2017-02-28 | 2019-12-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communicaton method, terminal device, and network device |
US20200106583A1 (en) * | 2018-09-28 | 2020-04-02 | Nokia Technologies Oy | Enhanced Sounding Reference Signal Scheme |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107370525B (zh) * | 2016-05-12 | 2021-03-30 | 华为技术有限公司 | 用于信道状态信息反馈的方法、基站、终端设备及*** |
CN111835390B (zh) * | 2019-04-16 | 2021-11-30 | 华为技术有限公司 | 一种信道测量方法、通信装置及计算机可读介质 |
CN111510188B (zh) * | 2020-03-11 | 2021-06-29 | 北京邮电大学 | 波束搜索方法及装置 |
-
2021
- 2021-05-19 CN CN202110544164.0A patent/CN114826522B/zh active Active
- 2021-12-09 US US18/263,108 patent/US20240088953A1/en active Pending
- 2021-12-09 EP EP21922553.9A patent/EP4266616A4/en active Pending
- 2021-12-09 WO PCT/CN2021/136655 patent/WO2022160963A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105981320A (zh) * | 2014-02-19 | 2016-09-28 | 华为技术有限公司 | 一种信道状态信息反馈方法、装置、用户设备及基站 |
CN109644029A (zh) * | 2016-08-10 | 2019-04-16 | Idac控股公司 | 用于大规模天线***中的信道状态信息报告的方法 |
US20190379483A1 (en) * | 2017-02-28 | 2019-12-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communicaton method, terminal device, and network device |
CN108540995A (zh) * | 2017-03-03 | 2018-09-14 | 维沃移动通信有限公司 | 一种信道状态检测方法、网络设备及用户设备 |
US20200106583A1 (en) * | 2018-09-28 | 2020-04-02 | Nokia Technologies Oy | Enhanced Sounding Reference Signal Scheme |
Non-Patent Citations (1)
Title |
---|
See also references of EP4266616A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024136703A1 (en) * | 2022-12-20 | 2024-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for beam tracking |
Also Published As
Publication number | Publication date |
---|---|
US20240088953A1 (en) | 2024-03-14 |
EP4266616A1 (en) | 2023-10-25 |
EP4266616A4 (en) | 2024-06-19 |
CN114826522A (zh) | 2022-07-29 |
CN114826522B (zh) | 2024-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113965232A (zh) | 信息反馈方法及装置 | |
US20230361842A1 (en) | Improving precoding | |
CN110809900A (zh) | 一种资源配置方法及其装置 | |
KR101376155B1 (ko) | 전송 파워를 동적으로 조정하는 방법, 제어 장치, 및 통신 시스템 | |
WO2022160963A1 (zh) | 一种通信方法及装置 | |
US11296755B2 (en) | Communication method and communications apparatus | |
CN114616762A (zh) | 用于传输信道状态信息的方法和设备 | |
WO2019144418A1 (zh) | 一种预编码矩阵索引上报方法、通信装置及介质 | |
CN109039488B (zh) | 通道校正的方法、网络设备及计算机可读介质 | |
US8774066B2 (en) | Macro-femto inter-cell interference mitigation | |
US12003353B2 (en) | Coverage enhanced reciprocity-based precoding scheme | |
US20240154706A1 (en) | Channel phase calibration method and related apparatus | |
WO2018006417A1 (zh) | 波束传输方法、装置以及通信*** | |
US10873378B2 (en) | Method and device for transmitting uplink signals | |
CN116762284A (zh) | 一种信道状态信息反馈方法及通信装置 | |
US20230019630A1 (en) | Update Method and Communications Apparatus | |
US20240235637A1 (en) | Methods of csi reporting for 5g nr rel. 17 type ii port selection codebook | |
CN115118316B (zh) | 类型ⅱ端口选择码本的反馈、确定方法及装置、计算机可读存储介质 | |
US20240187070A1 (en) | Methods of reporting additional delays for port selection codebook | |
US20240056137A1 (en) | Network node and method for creating a precoder in a wireless communications network | |
WO2022068616A1 (zh) | 一种通信方法及装置 | |
WO2023206170A1 (zh) | Csi的上报方法、预编码矩阵的确定方法、装置及设备 | |
CN113315723B (zh) | 时延上报方法、终端设备及网络设备 | |
US20240204844A1 (en) | Information feedback method and related apparatus | |
CN118057769A (zh) | 一种通信方法及相关装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21922553 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021922553 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2021922553 Country of ref document: EP Effective date: 20230720 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18263108 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |