WO2023159575A1 - Procédé de communication, dispositif terminal, et dispositif réseau - Google Patents

Procédé de communication, dispositif terminal, et dispositif réseau Download PDF

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Publication number
WO2023159575A1
WO2023159575A1 PCT/CN2022/078310 CN2022078310W WO2023159575A1 WO 2023159575 A1 WO2023159575 A1 WO 2023159575A1 CN 2022078310 W CN2022078310 W CN 2022078310W WO 2023159575 A1 WO2023159575 A1 WO 2023159575A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
information
codebook
tpmi
dft
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PCT/CN2022/078310
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English (en)
Chinese (zh)
Inventor
陈文洪
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2022/078310 priority Critical patent/WO2023159575A1/fr
Priority to CN202280068261.XA priority patent/CN118679812A/zh
Publication of WO2023159575A1 publication Critical patent/WO2023159575A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and more specifically, to a communication method, terminal equipment, and network equipment.
  • a class of terminal equipment such as customer premise equipment (CPE) and augmented reality (augmented reality, AR) equipment has been introduced.
  • CPE customer premise equipment
  • AR augmented reality
  • Such terminal equipment usually supports more than 4 antenna ports (for example, 8 antenna ports, 16 antenna ports, etc.) to meet the data transmission requirements of high transmission rates.
  • an uplink codebook larger than 4 antenna ports needs to be introduced, which increases the size of the uplink codebook.
  • the network device and the terminal device pre-agreed to store a fixed codebook on the device, and instruct the terminal device to send the precoding matrix indication (transmit precoding matrix indicator, TPMI), so that the terminal device can determine the precoding matrix used to transmit uplink data in the uplink codebook based on TPMI, a large fixed codebook is required, which will cause the TPMI information carried in the DCI to be large and occupy too much transfer resources.
  • TPMI precoding matrix indicator
  • the present application provides a communication method, a terminal device and a network device, so as to reduce the number of bits occupied by the TPMI carried by the DCI (hereinafter referred to as "the first TPMI"), which is beneficial to the transmission resources occupied by the DCI.
  • a communication method including: a terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; the terminal The device obtains the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; the terminal device determines the first TPMI from the first codebook according to the first TPMI
  • the precoding matrix of the uplink data wherein the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, The number of first DFT vectors in the first codebook, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the terminal Antenna array dimension information of the device and the number of beams supported by the terminal device
  • a communication method including: the network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted by the terminal device, the The TPMI indication field is used to carry the first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; the network device indicates the size of the field according to the TPMI and the DCI Length, generating the DCI; the network device sends the DCI to the terminal device; wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension Number of ports, uplink RI constraint, codebook subset constraint, number of first DFT vectors in the first codebook, number of phases between first polarization directions, offset of DFT vectors between transmission layers, transmission layer The number of offsets between the DFT vectors, the antenna array dimension information
  • a terminal device including: a processing unit configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; The processing unit is further configured to obtain the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; the processing unit is further configured to obtain the first TPMI according to the first TPMI, determining the precoding matrix of the uplink data from the first codebook, wherein the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, Uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between the first polarization directions, the offset of DFT vectors between transmission layers, and the DFT between transmission layers The number of vector offsets, the antenna array dimension information of the terminal device, and the
  • a network device including: a processing unit configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted by the terminal device , the TPMI indication field is used to carry a first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; the processing unit is further configured to indicate according to the TPMI field and the length of the DCI to generate the DCI; a sending unit configured to send the DCI to the terminal device, wherein the first information includes at least one of the following parameters: a first horizontal dimension antenna Number of ports, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between first polarization directions, and the number of phases between transmission layers The offset of the DFT vector, the amount of the offset of the DFT vector between transmission layers, the
  • a terminal including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory to make the terminal device execute Some or all of the steps in the method of the first aspect.
  • a network device including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to invoke the computer programs in the memory to make the network device Perform some or all of the steps in the method of the second aspect.
  • the embodiment of the present application provides a communication system, where the system includes the above-mentioned terminal and/or network device.
  • the system may further include other devices that interact with the terminal or network device in the solutions provided by the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program causes a terminal to perform some or all of the steps in the method of the first aspect above.
  • the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program causes the network device to perform some or all of the steps in the method of the second aspect above .
  • the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the terminal to execute the above-mentioned first Some or all of the steps in the method of one aspect.
  • the computer program product can be a software installation package.
  • the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a network device to execute Part or all of the steps in the method of the second aspect above.
  • the computer program product can be a software installation package.
  • an embodiment of the present application provides a chip, the chip includes a memory and a processor, and the processor can call and run a computer program from the memory to implement the method described in the first aspect or the second aspect above some or all of the steps.
  • the size of the first codebook can be adjusted through the first information, which is beneficial to reduce the number of bits occupied by the first TPMI carried by the DCI, so as to reduce the transmission resources occupied by the DCI transmission.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a codebook-based uplink precoding process.
  • Fig. 3 is a schematic diagram of a beam group pattern applicable to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a pattern of another beam group applicable to the embodiment of the present application.
  • FIG. 5 is a schematic diagram of an arrangement manner of an antenna array when eight antenna ports are arranged horizontally.
  • FIG. 6 is a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally and vertically.
  • FIG. 7 is a schematic diagram of an arrangement manner of an antenna array when eight antenna ports are arranged on four sides.
  • Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a network device according to an embodiment of the present application.
  • Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and a terminal device 120 .
  • the network device 110 may be a device that communicates with the terminal device 120 .
  • the network device 110 can provide communication coverage for a specific geographical area, and can communicate with the terminal device 120 located in the coverage area.
  • Figure 1 exemplarily shows one network device and two terminals.
  • the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. The embodiment does not limit this.
  • the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
  • the technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, and satellite communication systems, and so on.
  • the terminal equipment in the embodiment of the present application may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) ), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and can be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a notebook computer, a palmtop computer, a mobile internet device (mobile internet device, MID), a wearable device, a virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • UE can be used to act as a base station.
  • a UE may act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc.
  • a cell phone and an automobile communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
  • the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
  • the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network.
  • radio access network radio access network, RAN node (or device) that connects a terminal device to a wireless network.
  • the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (access point, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
  • NodeB Node B
  • eNB evolved base station
  • next generation NodeB next generation NodeB
  • a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device.
  • the base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network.
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
  • a helicopter or drone may be configured to serve as a device in communication with another base station.
  • the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
  • a gNB may also include an AAU.
  • Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air.
  • the scenarios where the network device and the terminal device are located are not limited.
  • Precoding processing can make data obtain precoding gains.
  • Precoding processing can be divided into two parts: analog domain processing and digital domain processing.
  • Analog domain processing maps the RF signal to the physical antenna for the transmitted analog signal.
  • analog domain processing can be achieved by means of beamforming.
  • Digital domain processing is aimed at digital signals, and can map the data of the transport layer to the radio frequency port.
  • Digital domain processing can be performed at baseband, eg precoding the digital signal using a precoding matrix.
  • the terminal device when sending uplink data to a network device, the terminal device may perform precoding processing on the uplink data.
  • the precoding process can make uplink data obtain uplink precoding gain.
  • the terminal device may perform precoding on the PUSCH.
  • the terminal device can precode the digital signal, and then perform beamforming on the analog signal.
  • codebook-based transmission For uplink data transmission, it can be divided into codebook-based transmission and non-codebook-based transmission.
  • codebook-based transmission one codeword in the codebook may correspond to one precoding matrix.
  • the precoding methods of codebook-based transmission and non-codebook-based transmission are different.
  • the following takes the uplink codebook-based precoding manner shown in FIG. 2 as an example to describe the uplink precoding process.
  • the network device may configure a sounding reference signal (sounding reference signal, SRS) resource (resource) set dedicated to codebook transmission for the terminal device.
  • SRS sounding reference signal
  • FIG. 2 is illustrated by taking N SRS resources included in the SRS resource set as an example, and N may be an integer greater than or equal to 1.
  • Step S210 the terminal device sends SRS on N SRS resources.
  • the SRS on each SRS resource may be transmitted using different beams.
  • the network device selects one SRS resource (for example, the SRS resource with the best signal quality) from the N SRS resources.
  • the SRS resource selected by the network device may be indicated through an SRS resource indicator (sounding reference signal resource indicator, SRI).
  • SRI sounding reference signal resource indicator
  • the SRS resource indicated by the SRI can also be used to obtain uplink channel state information (channel state information, CSI).
  • the network device may also determine at least one of the following information: a precoding matrix indicator (precoding matrix indicator, PMI), a rank indicator (rank indication, RI) or a channel quality indicator (channel quality indicator, CQI).
  • PMI can be selected from a codebook; RI or CQI can be obtained based on the selected PMI.
  • Step S230 the network device sends one or more of the following to the terminal device through downlink control information (DCI): SRI, transmit rank indicator (TRI), transmit precoding matrix indicator (transmit precoding One or more of matrix indicator, TPMI) and modulation and coding scheme (modulation and coding scheme, MCS).
  • DCI downlink control information
  • SRI transmit rank indicator
  • TRI transmit precoding matrix indicator
  • TPMI transmit precoding matrix indicator
  • MCS modulation and coding scheme
  • the terminal device may determine the number of layers based on the TRI, and determine the uplink precoding matrix (or precoder) corresponding to the TPMI from the codebook according to the TRI and the TPMI.
  • the terminal device may use the corresponding beam of the SRS resource indicated by the SRI to perform analog beamforming on the data.
  • Step S250 the terminal device sends the precoded uplink data and a demodulation reference signal (demodulation reference signal, DMRS) to the network device.
  • DMRS demodulation reference signal
  • uplink data transmission supports 2-port and 4-port transmission.
  • different codebooks correspond to different numbers of antenna ports, or in the case of the same number of antenna ports, different transmission layers may also correspond to different codebooks.
  • Table 1 to Table 4 are used as examples for introduction.
  • the TPMI index can be used to indicate the precoding vector W.
  • the TPMI indexes corresponding to the multiple precoding vectors in order from left to right are increasing.
  • Table 1 shows the codebook used when the number of antenna ports is 2 and the transmission layer 1 is used.
  • Table 2 shows that the number of antenna ports is 4, discrete Fourier transform spread orthogonal frequency division multiplexing (discrete Fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM) is used as the modulation method, and transmission layer 1 transmits the codebook used.
  • Table 3 shows that the number of antenna ports is 4, cyclic prefix orthogonal frequency division multiplexing (cyclic prefix orthogonal frequency division multiplexing, CP-OFDM) is used as the modulation method, and the codebook used in the transmission of the transmission layer 1 is used.
  • Table 4 shows the codebook used when the number of antenna ports is 2, DFT-S-OFDM is used as the modulation mode, and the transmission layer 2 is transmitted.
  • Table 5 shows the codebook used when the number of antenna ports is 2, CP-OFDM is used as the modulation technique, and the transmission layer 2 is transmitted.
  • Table 6 shows the codebook used when the number of antenna ports is 4, CP-OFDM is used as the modulation mode, and the transmission layer 3 is transmitted.
  • Table 7 shows the codebook used when the number of antenna ports is 4, CP-OFDM is used as the modulation mode, and the transmission layer 4 is transmitted.
  • the number of antenna ports corresponding to the codebook (also called “uplink codebook”) used in the uplink transmission process is 2 or 4.
  • the codebook (also called “downlink codebook”) used in the downlink transmission process stipulated in the current communication protocol includes antenna ports with more than 4 antenna ports. The number of corresponding codebooks.
  • the Type I codebook is described below as an example.
  • the Type I codebook can support more than 4 antenna ports.
  • the codebook subset restriction (CSR) for the Type I codebook is also introduced in the NR communication protocol.
  • the terminal device reports channel state information (CSI)
  • CSI channel state information
  • it cannot report the PMI corresponding to the beam constrained by the CSR or the PMI constrained by the CSR in a certain rank.
  • codebook subset constraints can be configured separately for each DFT beam and each rank.
  • the above codebook subset constraints may be configured by a network device.
  • a class of terminal equipment such as customer premise equipment (CPE) and augmented reality (augmented reality, AR) equipment has been introduced.
  • CPE customer premise equipment
  • AR augmented reality
  • Such terminal equipment usually supports more than 4 antenna ports (for example, 8 antenna ports, 16 antenna ports, etc.) to meet the data transmission requirements of high transmission rates.
  • an uplink codebook larger than 4 antenna ports needs to be introduced, which increases the size of the uplink codebook.
  • the network device indicates TPMI to the terminal device through DCI, so that the terminal device can determine the precoding matrix used for transmitting uplink data in the uplink codebook based on TPMI, which will cause The number of bits occupied by the carried TPMI is relatively large, which occupies too many transmission resources.
  • the embodiment of the present application provides a communication method to adjust the size of the uplink codebook (hereinafter referred to as "first codebook”) through the first information, which is beneficial to reduce the TPMI (hereinafter referred to as “first codebook”) carried by DCI.
  • first codebook the uplink codebook
  • the first information includes one or more of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the first The number of DFT vectors, the number of phases between the first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of terminal equipment, and the beams supported by terminal equipment quantity.
  • the above parameters are first introduced below, and then the communication method according to the embodiment of the present application is introduced in conjunction with FIG. 8 .
  • Parameter 1 the number of antenna ports in the first horizontal dimension, which is used to indicate the number of antenna ports in the horizontal direction, and can be represented by N 1 .
  • Parameter 2 the number of antenna ports in the first vertical dimension, which is used to indicate the number of antenna ports in the vertical direction, which can be represented by N 2 .
  • the foregoing parameter 1 and parameter 2 may also be used independently, which is not limited in this embodiment of the present application.
  • Parameter 3 Uplink RI constraint, used to indicate the rank that can be indicated in DCI, where the value of the rank that can be indicated in DCI is also used to determine the TPMI that can be indicated in DCI.
  • the above-mentioned uplink RI constraint may directly indicate the rank that can be indicated in the DCI.
  • the uplink RI constraint may use a bitmap (bitmap) to indicate the rank that can be indicated by the DCI.
  • bitmap bitmap
  • the maximum rank value supported by the terminal device is 4
  • the rank that can be indicated through the DCI can be indicated through a 4-bit bitmap.
  • Each rank supported by the terminal device may correspond to a bit in the bitmap, and when a bit in the bit in the bitmap is the first value, it means that the rank corresponding to the bit can be indicated by the DCI.
  • the bit in the bit in the bitmap is the second value, it means that the rank corresponding to the bit may not be indicated by the DCI, wherein the first value and the second value are different.
  • the uplink RI constraint may also indicate the maximum rank that can be indicated in the DCI. For example, if the value indicated by the uplink RI constraint is 2, the ranks that can be indicated in the DCI are 1 and 2.
  • the rank value that can be indicated in the above DCI is also used to determine the TPMI that can be indicated in the DCI.
  • the TPMI that can be indicated in the DCI is determined according to the Rank value. It can be understood that the DCI can only indicate the value corresponding to the currently allowed Rank value.
  • TPMI TPMI.
  • the uplink RI constraint indicates that the rank that can be indicated through DCI is the rank corresponding to the bit with a value of 1 in the bitmap
  • the TPMI can be indicated through DCI as the TPMI corresponding to the rank corresponding to the bit with a value of 1, that is
  • the precoding matrix can only be selected from the codebook corresponding to the currently allowed Rank value.
  • the above-mentioned uplink RI constraint may indirectly indicate the rank that can be indicated in the DCI by indicating the rank that cannot be indicated by the DCI.
  • the above-mentioned uplink RI constraint may also indicate the ranks that cannot be indicated by the DCI and the ranks that may be indicated by the DCI. This embodiment of the present application does not specifically limit it.
  • the rank indicated by DCI can be controlled through the above-mentioned uplink RI constraint, so as to avoid indicating the TPMI corresponding to the unnecessary rank indicated by DCI, which is beneficial to reduce the size of the first codebook indicated by DCI and reduce transmission Transmission resources occupied by DCI.
  • a terminal device at the edge of a cell usually performs uplink transmission based on the TPMI corresponding to the low-rank value.
  • the TPMI corresponding to the high-rank value can be constrained by the uplink RI, and the TPMI corresponding to the high-rank value can be not indicated through DCI, so as to reduce the overhead of DCI signaling transmission, thereby Improve the PDCCH detection performance of the terminal equipment.
  • Parameter 4 Codebook subset constraints, used to indicate one or more of the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook, and the codewords available in the first codebook .
  • the above codebook subset constraints may directly indicate the DFT vectors available in the first codebook. In some other implementation manners, the above codebook subset constraint may indirectly indicate the available DFT vectors in the first codebook by indicating the unavailable DFT vectors in the first codebook. Of course, the above-mentioned codebook subset constraint may indicate available DFT vectors and unavailable DFT vectors at the same time. This embodiment of the present application does not specifically limit it.
  • the codebook subset constraint can indicate the DFT vectors available in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate DFT vector, and the bit corresponding to the first value in the bitmap corresponds to the candidate
  • the DFT vector is a DFT vector available in the first codebook
  • the candidate DFT vector phase corresponding to the bit whose value is the second value in the bitmap is a DFT vector unavailable in the first codebook.
  • the size of the first codebook can be controlled by indicating the available DFT vector.
  • the above codebook subset constraints may directly indicate the available inter-polarization phases in the first codebook.
  • the above-mentioned codebook subset constraint may indirectly indicate the available inter-polarization phases in the first codebook by indicating the unavailable inter-polarization phases in the first codebook.
  • the above-mentioned codebook subset constraint may simultaneously indicate available inter-polarization phases and unavailable inter-polarization phases. This embodiment of the present application does not specifically limit it.
  • the codebook subset constraint can indicate the available inter-polarization phase in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate inter-polarization phase, and the value in the bitmap is the first
  • the candidate inter-polarization phase corresponding to the bit of the first value is the inter-polarization phase available in the first codebook
  • the candidate inter-polarization phase corresponding to the bit with the second value in the bitmap is the first Inter-polarization phase not available in the codebook.
  • the size of the first codebook can be controlled by indicating the available inter-polarization phase through codebook subset constraints.
  • the above-mentioned codebook subset constraints may directly indicate codewords available in the first codebook. In some other implementation manners, the above-mentioned codebook subset constraint may indirectly indicate available codewords in the first codebook by indicating unavailable codewords in the first codebook. Of course, the above-mentioned codebook subset constraints may indicate both available codewords and unavailable codewords. This embodiment of the present application does not specifically limit it.
  • the codebook subset constraint can indicate the available codewords in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate codeword, and the bit whose value is the first value in the bitmap corresponds to
  • the candidate codewords of are available codewords in the first codebook, and the candidate codewords corresponding to the bits whose value is the second value in the bitmap are unavailable codewords in the first codebook.
  • the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook and one of the codewords available in the first codebook can be controlled through the above-mentioned codebook constraint subset or more, which is beneficial to adjust the size of the first codebook and reduce the transmission resources occupied by DCI transmission.
  • the change in its communication environment is small, and the available DFT vectors, available inter-polarization phases, and available codewords corresponding to such terminal devices are relatively fixed.
  • the size of the first codebook can be adjusted to reduce the transmission resources occupied by DCI transmission, thereby improving the efficiency of the terminal equipment. PDCCH detection performance.
  • the number of first DFT vectors may include the number of first horizontal dimension DFT vectors and/or the number of first vertical dimension DFT vectors.
  • each horizontal-dimensional DFT vector may correspond to one horizontal beam, and correspondingly, the number of horizontal-dimensional DFT vectors is the number of horizontal-dimensional beams.
  • each DFT vector in the vertical dimension may correspond to a vertical beam, and correspondingly, the number of DFT vectors in the vertical dimension is the number of beams in the vertical dimension.
  • the number of first DFT vectors only includes the number of DFT vectors in the first horizontal dimension.
  • the number of first DFT vectors may be one of 4, 8, 16 and 32.
  • the quantity of the first DFT vector comprises the quantity of the first horizontal dimension DFT vector and the quantity of the first vertical dimension DFT vector
  • the quantity of the first horizontal dimension DFT vector and the quantity of the first vertical dimension DFT vector can be ⁇ 4, 4 ⁇ , ⁇ 8, 8 ⁇ , ⁇ 4, 16 ⁇ and one of ⁇ 2, 32 ⁇ .
  • the terminal device can determine the codewords in the first codebook based on the first DFT vector, or in other words, the number of the first DFT vectors directly affects the size of the first codebook corresponding to the terminal device.
  • the number of the above-mentioned first DFT vectors is adjusted according to the channel environment of the terminal device, and different numbers of first DFT vectors are configured for different terminal devices, so as to avoid configuring unnecessary first DFT vectors for the terminal device , at the same time, it also prevents the terminal device from determining the corresponding codeword based on the unnecessary first DFT, which reduces the number of codewords in the first codebook corresponding to the terminal device to a certain extent (or in other words, reduces the number of codewords in the first codebook size), thereby reducing the transmission overhead of DCI signaling.
  • Parameter 6 The number of phases between the first polarization directions is related to the value of the phase between the first polarization directions.
  • the value of the phase between the first polarization directions can be expressed as [1, q].
  • the above-mentioned first information may use the quantity of the first inter-polarization phase to indicate whether the inter-polarization phase adopts BPSK elements, QPSK elements, or 8PSK elements.
  • different numbers of inter-polarization phases can be configured for different terminal devices, so as to avoid configuring too many first inter-polarization phases for the terminal device, thereby reducing Transmission overhead of DCI signaling.
  • Parameter 7 the offset of the DFT vector between the transmission layers, indicating the offset (offset) between the indices of the DFT vectors corresponding to the two transmission layers. That is to say, the index of the DFT vector corresponding to another transmission layer can be obtained according to the DFT vector offset between the transmission layers and the index of the DFT vector corresponding to one transmission layer.
  • the above-mentioned DFT vector offsets between transmission layers are values in ⁇ 0, 2, 4, 8, 16 ⁇ .
  • Parameter 8 the number of offsets of DFT vectors between transmission layers, indicating the number of candidate values of offsets (offsets) between indices of DFT vectors corresponding to two transmission layers.
  • the antenna array dimension information of the terminal device can include the number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports supported by the terminal device.
  • the antenna array dimension information of the terminal device can include the number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports supported by the terminal device.
  • the number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports please refer to the above. Introduction of parameter 1 and parameter 2.
  • the antenna array dimension information of the terminal device may also include an arrangement manner of the antenna array of the terminal device.
  • the arrangement of the antenna array may include one or more of horizontal arrangement, horizontal and vertical two-dimensional arrangement, and four-sided arrangement.
  • Parameter 10 The number of beams supported by the terminal equipment.
  • the number of beams supported by the terminal device may include the number of beams in the horizontal dimension and/or the number of beams in the vertical dimension.
  • the beams supported by the terminal device may include eight beams in the horizontal dimension.
  • the beams supported by the terminal device may include four beams in the horizontal dimension and four beams in the vertical dimension.
  • FIG. 5 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally.
  • FIG. 6 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally and vertically.
  • FIG. 7 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged on four sides.
  • Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application. The method shown in FIG. 8 includes steps S810 to S860.
  • step S810 the network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information.
  • the foregoing DCI is used to schedule uplink data to be transmitted by the terminal equipment.
  • the above TPMI indication field is used to carry the first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook.
  • the TPMI information indication field may also carry the first RI.
  • the above TPMI information indication field may carry the first TPMI.
  • step S820 the network device generates DCI according to the size of the TPMI indication field and the length of the DCI.
  • step S830 the network device sends DCI to the terminal device.
  • step S840 the terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information.
  • step S850 the terminal device obtains the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI.
  • the terminal device can detect the DCI sent by the network device according to the length of the DCI, and obtain the TPM information indication field from the detected DCI according to the size of the TPMI indication field, and then obtain the first TPMI information indication field from the TPMI information indication field. - the value of TPMI.
  • step S860 the terminal device determines the precoding matrix of the uplink data from the first codebook according to the first TPMI.
  • the foregoing first codebook may be pre-agreed by the network device and the terminal device.
  • the terminal device may determine the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook according to the first information; and determine the DFT vector in the first codebook and/or the first The inter-polarization phases in the codebook generate a first codebook.
  • the above-mentioned process of generating the first codebook can be performed at any time between the terminal device obtaining the first information and the terminal device determining the precoding matrix from the first codebook (that is, step S850) .
  • it can be performed before step S840.
  • it may be performed after step S840 and before step S860. This embodiment of the present application does not limit it.
  • the above step S810 and step S840 both involve determining the size of the TPMI indication field in the DCI and the length of the DCI according to the first information.
  • the above steps may include determining the size of the TPMI indication field according to the first information; and determining the length of the DCI according to the size of the TPMI indication field.
  • determining the length of the DCI according to the size of the TPMI indication field may include directly determining the length of the DCI based on the size of the TPMI indication field, or determining the length of the DCI based on the size of the TPMI indication field and sizes of other indication fields.
  • the method for determining the size of the TPMI indication field is introduced below in conjunction with determination mode 1 to determination mode 8, taking the first information including each of the above parameters as an example. It should be noted that the terminal device and the network device determine the size of the TPMI indication field in a similar manner, which will not be distinguished below. That is to say, the determination manner described below can be applied to a terminal device or a network device.
  • Determination method 1 If the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension ⁇ N 1 , N 2 ⁇ , it can be based on the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension The number of antenna ports determines the number of second DFT vectors in the first codebook; and determines the size of the TPMI indication field according to the number of second DFT vectors.
  • the definition of the quantity of the above-mentioned second DFT vector is the same as the definition of the quantity of the first DFT vector, in addition, the parameter for determining the quantity of the second DFT vector has the same meaning as the parameter for determining the quantity of the first DFT vector, can See the related introduction of parameter 5 above.
  • the number of the above-mentioned second DFT vectors may be one of 4, 8, 16, 32, 64, for example.
  • the above-mentioned second horizontal dimension sampling coefficient O3 and second vertical dimension sampling coefficient O4 may be configured by the network device, or pre-agreed between the terminal device and the network device, which is not limited in this embodiment of the present application.
  • the number of TPMIs available in the first codebook can be determined according to the rank value indicated by the uplink RI constraint; and the TPMI indication field can be determined according to the number of available TPMIs the size of. For example, assuming that the number of TPMIs available in the first codebook is N TPMI1 , the size of the TPMI indication field can be bit.
  • Determination mode 3 If the first information includes codebook subset constraints, the size of the TPMI indication field may be determined according to the codebook subset constraints.
  • the uplink codebook subset constraint indicates available DFT vectors and available inter-polarization phases in the first codebook
  • the number of available DFT vectors in the first codebook is L DFT 1
  • the size of the TPMI field is bit.
  • Determination mode 4 If the first information includes the number of first DFT vectors in the first codebook, then determination mode 4 can be divided into two types: determination mode 4-1 and determination mode 4-2.
  • the size of the first codebook can be determined according to the number of the first DFT vectors and the phase number between the second polarization directions; then the size of the TPMI indication field can be determined according to the size of the first codebook.
  • the size of the TPMI field is bit.
  • phase between the second polarization directions may be the quantity of the phase between the first polarization directions in the first information.
  • the number of phases between the second polarization directions may also be pre-agreed.
  • the determination mode 4-2 according to the quantity L of the first DFT vector, it is determined that the bit number of the DFT vector indication information included in the TPMI indication field is Then, according to the bit number of the DFT vector indication information, the size of the TPMI indication field is determined.
  • the number of bits of the DFT vector indication information included in the TPMI indication field can be calculated according to the formula Determine, or, the number of bits of the DFT vector indication information included in the TPMI indication field can be according to the formula Sure.
  • Determination mode 5 if the first information includes the quantity K of phases between the first polarization directions. Then the determination method 5 can be further divided into two types: a determination method 5-1 and a determination method 5-2.
  • the size of the first codebook can be determined according to the number K of phases between the first polarization directions and the number L′′ of the third DFT vector; then, the TPMI indication can be determined according to the size of the first codebook The size of the domain.
  • the domain size is bit.
  • the definition of the quantity of the third DFT vector is the same as the definition of the quantity of the first DFT vector.
  • the parameters used to determine the quantity of the third DFT vector are the same as the parameters used to determine the quantity of the first DFT vector have the same meaning, please refer to the introduction of parameter 5 above.
  • the number of the third DFT vectors may be the same as the number of the first DFT vectors in the first information, or in other words, the number of the third DFT vectors is equal to the number of the first DFT vectors. In other implementation manners, the number of the third DFT vectors may also be pre-agreed by the terminal device and the network device.
  • the determination mode 5-2 according to the quantity K of the phase between the first polarization directions, it is determined that the number of bits of the phase indication information between the polarization directions included in the TPMI indication field is Then, according to the number of bits of the phase indication information between polarization directions, the size of the TPMI indication field is determined.
  • Determination mode 6 if the first information includes the number of DFT vector offsets between transmission layers, then the number of DFT vector offsets between transmission layers in the TPMI indication field can be determined according to the number of DFT vector offsets between transmission layers The number of bits of the indication information; and then according to the number of bits of the indication information of the number of DFT vector offsets between transmission layers, the size of the TPMI indication field is determined.
  • the number of bits of the indication information of the number of DFT vector offsets between transmission layers is R
  • the antenna array dimension information may include the number of horizontal dimension antenna ports supported by the terminal device and The number of antenna ports in the vertical dimension, then the size of the TPMI indication field can be determined based on the antenna array dimension information.
  • the specific method based on it please refer to the above determination method 1.
  • the above-mentioned number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports can also be used to determine the number of DFT vectors in the first codebook, and then determine the TPMI based on the number of DFT vectors in the first codebook Indicates the size of the domain.
  • determine the size of the TPMI indication field refer to the relevant introduction of the determination method 4. For the sake of brevity, details are not repeated here.
  • Determination mode 8 if the first information includes the number of beams supported by the terminal device, then the size of the first codebook can be determined according to the number of beams and the phase number between the third polarization directions; then the TPMI can be determined according to the size of the first codebook Indicates the size of the domain.
  • the size of the TPMI field is bit.
  • the above-mentioned third phase between polarization directions may be the number of phases between the first polarization directions.
  • the number of phases between the third polarization directions may also be pre-agreed.
  • the definition of the quantity of phases between the third polarization directions above refer to the definition of the quantity of phases between the first polarization directions above, and for the sake of brevity, details are not repeated here.
  • the manner of determining the size of the TPMI indication field is based on each parameter in the first information. It should be noted that the solutions in the embodiments of the present application are not limited to the above eight determination methods. In some cases, when the first information includes multiple parameters above, the size of the TPMI indication field may be determined in combination with the multiple parameters. Since there are too many ways to combine the above parameters, this application does not list them one by one. The following only introduces the number of first DFT vectors included in the first information, the number of phases between the first polarization directions and the number of DFT vector offsets between transmission layers as an example.
  • the size of the above TPMI information indication field may be In other implementations, the size of the above TPMI information indication field may be Alternatively, the size of the above TPMI information indication field may also be
  • the DFT vectors between the transmission layers are biased
  • the amount of shift is R.
  • the size of the above TPMI information indication field may be In other implementations, the size of the above TPMI information indication field may be Alternatively, the size of the above TPMI information indication field may also be
  • the present application provides two ways of determining the first information.
  • the foregoing first information may be sent by the network device to the terminal device.
  • the network device may determine based on the signal sent by the terminal device.
  • the network device may receive a sounding reference signal (sounding reference signal, SRS) sent by the terminal device, and determine the first information according to channel information obtained from the SRS.
  • the network device may determine the first information based on a neural network.
  • the input of the neural network model may be actual channel information, and the output may be some or all parameters in the first information (for example, the antenna array dimension, the number of antenna ports in the horizontal dimension and the number of antenna ports in the vertical dimension, etc.).
  • the neural network model can be trained based on training data under a certain channel assumption. During the training process, the input of the neural network model can be the channel information under the above channel assumption.
  • the output can include the first channel information corresponding to the channel information. - information (for example, antenna array dimension, number of antenna ports in horizontal dimension and number of antenna ports in vertical dimension, etc.).
  • the foregoing first information may also be determined by the terminal device based on terminal capability information.
  • the network device may also be determined based on the terminal capability information.
  • the terminal capability information may include antenna array dimension information of the terminal device and the number of beams supported by the terminal device.
  • the foregoing terminal capability information may also include other information for determining parameters in the first information, which is not limited in this embodiment of the present application.
  • the terminal device may directly determine the parameters in the first information based on the terminal capability information.
  • the network device may also determine the parameters in the first information based on the terminal capability information, so as to prevent the network device from The first information is indicated to the terminal device, so as to simplify the communication process between the terminal device and the network device.
  • the first information may also be jointly determined based on the terminal capability information and the indication of the network device, which is not limited in the embodiment of the present application.
  • the first information includes antenna array dimension information, the number of phases between the first polarization directions, and the number of DFT vector offsets between transmission layers, where the antenna array dimension information may be determined based on terminal capability information, and the first The number of phases between polarization directions and the number of DFT vector offsets between transmission layers can be configured by network devices.
  • the codebook used by each terminal device to select the precoding matrix may be different. Therefore, in order to flexibly configure codebooks (including the first codebook) for different terminal devices, different above parameters may be configured for different terminal devices. Correspondingly, the terminal device can determine the codebook based on the corresponding parameters. Of course, in order to simplify the complexity of configuring the codebook, different terminal devices may also correspond to the same parameters, or in other words, different terminal devices determine the first codebook based on the same first information.
  • codebooks including the above-mentioned first codebook
  • different ranks may correspond to different parameters.
  • different ranks may correspond to different numbers of first DFT vectors.
  • the foregoing first information may include multiple different parameters, and different parameters correspond to different ranks.
  • different codebooks are determined based on different parameters, so that different ranks correspond to different codebooks.
  • the first information may include multiple different numbers of first DFT vectors, and different numbers of first DFT vectors may correspond to different ranks. In this way, multiple codebooks can be determined based on different numbers of first DFT vectors, and different codebooks in the multiple codebooks can correspond to different ranks.
  • the above-mentioned different parameters may also correspond to different rank sets.
  • the codebooks determined based on different parameters are different, so that different rank sets correspond to different codebooks, wherein the rank set includes one or multiple ranks.
  • rank set 1 includes ranks 1 and 2
  • rank set 2 includes ranks 3 and 4, where rank set 1 corresponds to the number of phases between polarization directions 4, and rank set 2 corresponds to the number of phases between polarization directions 2.
  • the codebook corresponding to rank set 1 is determined based on the number 4 of phases between polarization directions
  • the codebook corresponding to rank set 2 is determined based on the number 2 of phases between polarization directions.
  • different ranks can also correspond to the same parameters, or in other words, the codebooks corresponding to different ranks can be based on the same first information to determine.
  • different rank sets may also correspond to the same parameter, or in other words, codebooks corresponding to different rank sets may be determined based on the same first information.
  • the above mainly introduces the method for determining the size of the TPMI indication field in the DCI, and the following describes the method for the terminal device to determine the precoding matrix based on the first TPMI in the TPMI indication field after receiving the DCI. That is, if the first TPMI is used to indicate the index of the target DFT vector in the first codebook and the phase between the target polarization directions, the above step S860 includes: the terminal device, according to the index of the target DFT vector and the phase between the target polarization directions, from The precoding matrix of the uplink data is determined in the first codebook.
  • the first TPMI indication information may be different.
  • the first TPMI may also indicate the index of the target DFT vector, the phase between target polarization directions, and the DFT vector offset between different transmission layers.
  • the first TPMI may include three pieces of information: the indication information of the DFT vector in the horizontal dimension, the indication information of the DFT vector in the vertical dimension, and the indication information of the phase between polarization directions.
  • the above-mentioned first TPMI may include four pieces of information: the indication information of the DFT vector in the horizontal dimension, the indication information of the DFT vector in the vertical dimension, the indication information of the DFT vector offset between transmission layers, and the indication of the phase between polarization directions information.
  • the indication information of the DFT vector offset between transmission layers may be used to determine a currently used DFT vector offset from the multiple DFT vector offsets between transmission layers indicated by the first information.
  • the following takes the index of the first TPMI indicating the horizontal dimension DFT vector, the vertical dimension DFT vector and the phase between polarization directions as an example, and introduces how the first TPMI indicates the precoding matrix.
  • the precoding matrix in the first codebook corresponding to different ranks can be Indicates the following situations.
  • the precoding matrix in the first codebook can be expressed as:
  • k 1 and k 2 may be DFT vector offsets between transmission layers indicated by the network device through high-layer signaling, where the high-layer signaling may be the first information. Certainly, k 1 and k 2 may be offsets of DFT vectors between transmission layers indicated by the first TPMI.
  • k 1 and k 2 may be DFT vector offsets between transmission layers indicated by the network device through high-layer signaling, where the high-layer signaling may be the first information. Certainly, k 1 and k 2 may be offsets of DFT vectors between transmission layers indicated by the first TPMI.
  • the number N1 of antenna ports in the first horizontal dimension and the number N2 of antenna ports in the first vertical dimension determine the number of rows of each codeword (or precoding matrix) in the first codebook.
  • FIG. 9 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 900 shown in FIG. 9 includes a processing unit 910 .
  • the processing unit 910 is configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted;
  • the processing unit 910 is further configured to acquire the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI;
  • the processing unit 910 is further configured to determine a precoding matrix of the uplink data from a first codebook according to the first TPMI, wherein the first information includes at least one of the following parameters: the first Number of antenna ports in the horizontal dimension, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between the first polarization directions, transmission The offset of the DFT vector between layers, the quantity of the offset of the DFT vector between transmission layers, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.
  • the first information includes at least one of the following parameters: the first Number of antenna ports in the horizontal dimension, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between the first polarization directions, transmission The offset of the DFT vector between layers, the quantity of the offset of the DFT vector between transmission layers, the antenna
  • the processing unit is further configured to: determine the size of the TPMI indication field according to the first information; determine the length of the DCI according to the size of the TPMI indication field.
  • the number of the first DFT vectors includes the number L1 of the first horizontal dimension DFT vectors and the first vertical dimension DFT
  • the number of vectors L 2 , and the number of DFT vectors in the first horizontal dimension L 1 N 1 O 1
  • the number of DFT vectors in the second vertical dimension L 2 N 2 O 2
  • N 1 represents the second
  • O 1 represents the sampling coefficient of the first horizontal dimension
  • N 2 represents the number of antenna ports in the second vertical dimension
  • O 2 represents the sampling coefficient of the first vertical dimension.
  • the processing unit is further configured to: according to the first The number of antenna ports in the horizontal dimension and the number of antenna ports in the first vertical dimension determine the number of second DFT vectors in the first codebook; determine the size of the TPMI indication field according to the number of the second DFT vectors .
  • the uplink RI constraint is used to indicate a rank that can be indicated in the DCI, and the value of the rank is used to determine the DCI The TPMI that can be indicated in.
  • the processing unit is further configured to: determine the first code according to the rank value indicated by the uplink RI constraint The number of available TPMIs in this document; according to the number of available TPMIs, determine the size of the TPMI indication field.
  • the codebook subset constraint is used to indicate the available DFT vectors in the first codebook, and the first The inter-polarization phase available in the codebook and one or more parameters in the codewords available in the first codebook.
  • the processing unit is further configured to: according to the number of the first DFT vectors and the second polarization direction The number of phases determines the size of the first codebook; and determines the size of the TPMI indication field according to the size of the first codebook.
  • the number of phases between the second polarization directions is the phase number between the first polarization directions or, the number of phases between the second polarization directions is predetermined.
  • the processing unit is further configured to: determine the TPMI according to the number L of the first DFT vectors
  • the number of bits of the DFT vector indication information included in the indication field is The size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information.
  • the processing unit is further configured to: according to the number of phases between the first polarization directions and The quantity of the third DFT vector determines the size of the first codebook; and determines the size of the TPMI indication field according to the size of the first codebook.
  • the number of the third DFT vectors is the number of the first DFT vectors; or the third DFT The number of vectors is pre-agreed.
  • the processing unit is further configured to: according to the quantity K of the phases between the first polarization directions K, determining the number of bits of the phase indication information between polarization directions included in the TPMI indication field is The size of the TPMI indication field is determined according to the number of bits of the inter-polarization phase indication information.
  • the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, or, q represents the size of a QPSK element, or, q represents 8PSK element size.
  • the inter-transmission layer DFT vector offset represents an offset between the index of the DFT vector corresponding to the first transmission layer and the index of the DFT vector corresponding to the second transmission layer.
  • the TPMI indication field is used to indicate the DFT vector between the transmission layers.
  • the number of bits occupied by the offset indication information is expressed as
  • the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to different rank sets; or the first information Included parameters are used for all ranks.
  • the antenna array dimension information includes the number of horizontal-dimension antenna ports supported by the terminal device and the number of vertical-dimension antenna ports supported by the terminal device, or, the antenna array dimension information indicates the Describe the arrangement of the antenna array of the terminal device.
  • the arrangement manner of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement, or a four-sided arrangement.
  • the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device.
  • the first information is indicated by a network device through high-level signaling, or the first information is carried in terminal capability information of the terminal device.
  • the TPMI information indication field also carries the first RI.
  • the first TPMI is used to indicate an index of a target DFT vector in the first codebook and a target inter-polarization phase
  • the processing unit is further configured to: according to the The index of the target DFT vector and the phase between the target polarization directions are used to determine the precoding matrix of the uplink data from the first codebook.
  • the first codebook is determined by the terminal device according to the first information.
  • the processing unit is further configured to: determine the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook according to the first information ; generating the first codebook according to the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook.
  • FIG. 10 is a schematic diagram of a network device according to an embodiment of the present application.
  • the network device 1000 shown in FIG. 10 includes: a processing unit 1010 and a sending unit 1020 .
  • the processing unit 1010 is configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, the DCI is used to schedule uplink data to be transmitted by the terminal device, and the TPMI indication field is used to carry the first TPMI, the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook;
  • the processing unit 1010 is further configured to generate the DCI according to the size of the TPMI indication field and the length of the DCI, wherein the first information includes at least one of the following parameters: a first horizontal dimension antenna Number of ports, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between first polarization directions, and the number of phases between transmission layers
  • the offset of the DFT vector the amount of the offset of the DFT vector between transmission layers, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.
  • the sending unit 1020 is configured to send the DCI to the terminal device.
  • the sending unit is configured to send the first information to the terminal device.
  • the network device further includes: a first receiving unit, configured to receive the SRS sent by the terminal device; the processing unit, configured to obtain channel information according to the SRS; and The channel information determines the first information.
  • the network device further includes: a second receiving unit, configured to receive terminal capability information of the terminal device; the processing unit, configured to determine, according to the terminal capability information, the The first information, the terminal capability information includes antenna array dimension information of the terminal device and the number of beams supported by the terminal device.
  • the processing unit is configured to: determine the size of the TPMI indication field according to the first information; determine the length of the DCI according to the size of the TPMI indication field.
  • the number of the first DFT vectors includes the number L1 of the first horizontal dimension DFT vectors and the first vertical dimension DFT
  • the number of vectors L 2 , and the number of DFT vectors in the first horizontal dimension L 1 N 1 O 1
  • the number of DFT vectors in the second vertical dimension L 2 N 2 O 2
  • N 1 represents the second
  • O 1 represents the sampling coefficient of the first horizontal dimension
  • N 2 represents the number of antenna ports in the second vertical dimension
  • O 2 represents the sampling coefficient of the first vertical dimension.
  • the processing unit is configured to: The number of dimensional antenna ports and the number of antenna ports in the first vertical dimension determine the number of second DFT vectors in the first codebook; determine the size of the TPMI indication field according to the number of second DFT vectors.
  • the number of the second DFT vectors includes the number L 3 of the second horizontal dimension DFT vectors and the number L 4 of the second vertical dimension DFT vectors, and the number of the second horizontal dimension DFT vectors
  • Quantity L 3 N 1 O 3
  • the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is used to determine the TPMI that can be indicated in the DCI.
  • the processing unit is configured to: determine the rank in the first codebook according to the rank available in the first codebook The number of available TPMIs; according to the number of available TPMIs in the first codebook, determine the size of the TPMI indication field.
  • the codebook subset constraint is used to indicate the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook, and the first One or more parameters in the codewords available in the codebook.
  • the processing unit is configured to: according to the number of the first DFT vectors and the phase between the second polarization directions Determine the size of the first codebook; determine the size of the TPMI indication field according to the size of the first codebook.
  • the number of phases between the second polarization directions is the phase number between the first polarization directions or, the number of phases between the second polarization directions is predetermined.
  • the processing unit is configured to: determine the TPMI indication according to the number L of the first DFT vectors
  • the number of bits of the DFT vector indication information included in the field is
  • the size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information.
  • the processing unit is configured to: according to the number K of phases between the first polarization directions , determine that the number of bits of the phase indication information between polarization directions included in the TPMI indication field is
  • the processing unit is configured to: according to the first inter-polarization phase quantity and the first Three DFT vector numbers, determine the size of the first codebook; determine the size of the TPMI indication field according to the size of the first codebook.
  • the number of the third DFT vectors is the number of the first DFT vectors; or the third DFT The number of vectors is pre-agreed.
  • the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, or, q represents the size of a QPSK element, or, q represents 8PSK element size.
  • the inter-transmission layer DFT vector offset represents an offset between the index of the DFT vector corresponding to the first transmission layer and the index of the DFT vector corresponding to the second transmission layer.
  • the TPMI indication field is used to indicate the DFT vector between the transmission layers.
  • the number of bits occupied by the offset indication information is expressed as
  • the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to different rank sets; or the first information Included parameters are used for all ranks.
  • the antenna array dimension information includes the number of horizontal-dimension antenna ports supported by the terminal device and the number of vertical-dimension antenna ports supported by the terminal device, or, the antenna array dimension information indicates the Describe the arrangement of the antenna array of the terminal device.
  • the arrangement manner of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement, or a four-sided arrangement.
  • the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device.
  • the TPMI information indication field also carries the first RI.
  • the first codebook is determined according to the first information.
  • the first information is used to determine an index of a target DFT vector and/or a target inter-polarization phase in the first codebook.
  • Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dashed line in Figure 11 indicates that the unit or module is optional.
  • the apparatus 1100 may be used to implement the methods described in the foregoing method embodiments.
  • Apparatus 1100 may be a chip, a terminal device or a network device.
  • Apparatus 1100 may include one or more processors 1110 .
  • the processor 1110 can support the device 1100 to implement the methods described in the foregoing method embodiments.
  • the processor 1110 may be a general purpose processor or a special purpose processor.
  • the processor may be a central processing unit (central processing unit, CPU).
  • the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) 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.
  • Apparatus 1100 may also include one or more memories 1120 .
  • a program is stored in the memory 1120, and the program can be executed by the processor 1110, so that the processor 1110 executes the methods described in the foregoing method embodiments.
  • the memory 1120 may be independent from the processor 1110 or may be integrated in the processor 1110 .
  • Apparatus 1100 may also include a transceiver 1130 .
  • the processor 1110 can communicate with other devices or chips through the transceiver 1130 .
  • the processor 1110 may send and receive data with other devices or chips through the transceiver 1130 .
  • the embodiment of the present application also provides a computer-readable storage medium for storing programs.
  • the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product includes programs.
  • the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
  • the value range corresponding to the letter representing the quantity may be a natural number.
  • the value range of the number N 1 of antenna ports in the first horizontal dimension is a natural number.
  • the value range of the number N2 of antenna ports in the first horizontal dimension is a natural number.
  • the value range of the quantity L 1 of the first horizontal dimension DFT vector is a natural number.
  • the value range of the quantity L 2 of the first vertical dimension DFT vector is a natural number.
  • the value range of the quantity L of the first DFT vector is a natural number.
  • the value range of the quantity K of phases between the first polarization directions is a natural number.
  • the value range of the offset quantity R of the DFT vector between transmission layers is a natural number.
  • system and “network” may be used interchangeably in this application.
  • the terms used in the application are only used to explain the specific embodiments of the application, and are not intended to limit the application.
  • the terms “first”, “second”, “third” and “fourth” in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order .
  • the terms “include” and “have”, as well as any variations thereof, are intended to cover a non-exclusive inclusion.
  • the "indication" mentioned may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is instructed, configures and is configured, etc. relation.
  • predefined or “preconfigured” can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • the application does not limit its specific implementation.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device 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 can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

Sont divulgués un procédé de communication, un dispositif terminal et un dispositif réseau. Le procédé comprend les étapes suivantes : un dispositif terminal détermine la taille d'un domaine d'indication de TPMI dans des DCI ainsi que la longueur des DCI en fonction de premières informations, les DCI étant utilisées pour planifier des données de liaison montante à transmettre ; le dispositif terminal obtient un premier TPMI à partir du domaine d'indication de TPMI en fonction de la taille du domaine d'indication de TPMI et de la longueur des DCI ; et le dispositif terminal détermine une matrice de précodage des données de liaison montante à partir d'un premier livre de codes en fonction du premier TPMI, les premières informations comprenant un ou plusieurs éléments parmi : le nombre de premiers ports d'antenne à dimension horizontale, le nombre de premiers ports d'antenne à dimension verticale, une contrainte RI de liaison montante, une contrainte de sous-ensemble de livre de codes, le nombre de premiers vecteurs DFT dans le premier livre de codes, le nombre de phases entre des premières directions de polarisation, des décalages de vecteurs DFT entre des couches de transport, le nombre de décalages des vecteurs DFT entre les couches de transport, des informations de dimensions de réseau d'antennes et le nombre de faisceaux. Ainsi, le nombre de bits occupés par le premier TPMI contenu dans les DCI est réduit.
PCT/CN2022/078310 2022-02-28 2022-02-28 Procédé de communication, dispositif terminal, et dispositif réseau WO2023159575A1 (fr)

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PCT/CN2022/078310 WO2023159575A1 (fr) 2022-02-28 2022-02-28 Procédé de communication, dispositif terminal, et dispositif réseau
CN202280068261.XA CN118679812A (zh) 2022-02-28 2022-02-28 通信方法、终端设备及网络设备

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US20180287682A1 (en) * 2017-03-23 2018-10-04 Samsung Electronics Co., Ltd. Method and apparatus for transmitting data in wireless communication system
CN110035534A (zh) * 2018-01-11 2019-07-19 维沃移动通信有限公司 无线通信方法及装置
CN111869119A (zh) * 2018-03-19 2020-10-30 高通股份有限公司 用于通信系统的范围扩展
US20210050890A1 (en) * 2019-08-16 2021-02-18 Lg Electronics Inc. Method and apparatus for uplink signal transmission based on codebook in a wireless communication system
WO2022016504A1 (fr) * 2020-07-24 2022-01-27 Zte Corporation Procédé de transmission en liaison montante associé à un port d'antenne et à une commutation de panneau

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180287682A1 (en) * 2017-03-23 2018-10-04 Samsung Electronics Co., Ltd. Method and apparatus for transmitting data in wireless communication system
CN110035534A (zh) * 2018-01-11 2019-07-19 维沃移动通信有限公司 无线通信方法及装置
CN111869119A (zh) * 2018-03-19 2020-10-30 高通股份有限公司 用于通信系统的范围扩展
US20210050890A1 (en) * 2019-08-16 2021-02-18 Lg Electronics Inc. Method and apparatus for uplink signal transmission based on codebook in a wireless communication system
WO2022016504A1 (fr) * 2020-07-24 2022-01-27 Zte Corporation Procédé de transmission en liaison montante associé à un port d'antenne et à une commutation de panneau

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