WO2024016979A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024016979A1
WO2024016979A1 PCT/CN2023/103493 CN2023103493W WO2024016979A1 WO 2024016979 A1 WO2024016979 A1 WO 2024016979A1 CN 2023103493 W CN2023103493 W CN 2023103493W WO 2024016979 A1 WO2024016979 A1 WO 2024016979A1
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WO
WIPO (PCT)
Prior art keywords
candidate
precodes
uplink transmission
information
terminal device
Prior art date
Application number
PCT/CN2023/103493
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English (en)
Chinese (zh)
Inventor
徐军
高君慧
金黄平
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华为技术有限公司
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Publication of WO2024016979A1 publication Critical patent/WO2024016979A1/fr

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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
    • H04B7/0413—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and device.
  • the fifth generation (5G) mobile communication system has higher requirements on system capacity, spectrum efficiency and other aspects.
  • massive multiple-input multiple-output (massive-MIMO) technology plays a crucial role in improving the spectrum efficiency of the system.
  • massive-MIMO technology terminal equipment needs to precode the data when sending uplink data.
  • Multi-antenna precoding for uplink transmission can support multiple types of transmission modes. For example, a common transmission mode is the non-codebook based UL transmission scheme (NCB).
  • NCB non-codebook based UL transmission scheme
  • the terminal device obtains the uplink channel information based on the channel state information reference signal (CSI-RS) sent by the network device and the channel reciprocity, and then calculates multiple candidate precoders (precoder ), and loads multiple candidate precodes onto the sounding reference signal (SRS) resource and sends it to the network device. Finally, the network device indicates the selected precode to the network device through the SRS resource indicator (SRS resource indicator, SRI). Terminal Equipment.
  • CSI-RS channel state information reference signal
  • precoder multiple candidate precoders
  • SRS resource indicator SRI
  • the current indication method of network equipment can only be applied to terminal equipment with a limited number of transmitting antennas and uplink transmission layers, that is, the number of supported transmitting antennas and uplink transmission layers is limited.
  • the number of transmit antennas and uplink transmission layers supported by terminal equipment is also increasing.
  • the existing indication method is obviously unable to support it and may cause uplink transmission failure.
  • the present application provides a communication method and device for flexibly performing precoding instructions, so as to be applicable to more transmitting antennas and uplink transmission layer terminal equipment, and to improve uplink transmission performance.
  • this application provides a communication method, which can be applied to a terminal device, a functional module in the terminal device, a processor or chip in the terminal device, etc.
  • the method may include: the terminal device receives first information from the network device, the first information is used to indicate W precoding, and is used to indicate whether the number of uplink transmission layers is greater than M; further, The terminal device may determine N precodes based on the W precodes and whether the number of uplink transmission layers is greater than M, and send uplink data based on the N precodes.
  • the W is a positive integer
  • M is a preset uplink transmission layer number threshold
  • the N is an integer greater than or equal to the W.
  • the precoding indication of the actual number of uplink transmission layers can be flexibly adapted, so that the number of transmit antennas supported by the terminal device can be flexibly adapted to improve uplink transmission performance.
  • the instruction overhead is relatively small.
  • the terminal device may determine the candidate precoding and send the candidate precoding to the network device through resources used for uplink transmission.
  • the candidate precoding wherein the number of the candidate precoding is related to the number of resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission; the W precoding and the N precodes are all included in the candidate precodes. In this way, the network device can subsequently accurately select W precodes among the candidate precodes to indicate to the terminal device.
  • the terminal device passes all The resource used for uplink transmission sends the candidate precode to the network device.
  • the method may be: the terminal device sorts A*B candidate precodes according to the first performance from high to low; then, the terminal The device divides the sorted A*B candidate precodes into a group of candidate precodes according to the sorting order, and each group of candidate precodes contains B candidate precodes; finally, the terminal device divides the A group of candidate precodes into The precodes are respectively sent to the network device through A resources for uplink transmission, and the A group of candidate precodes correspond to the A resources for uplink transmission one-to-one.
  • the A is a positive integer
  • the B is a positive integer. In this way, the terminal device can flexibly and accurately send the determined candidate precoding to the network device.
  • two sequentially adjacent candidate precoders are not located in the same group, but are located in adjacent groups.
  • the first information is used to indicate whether the number of uplink transmission layers is greater than M, which can be implemented by the following method: the first information can include a first bit, and the first bit indicates that the Whether the number of uplink transmission layers is greater than M; or, the first information may include a first field, the first field is used to indicate the number of activated codewords; wherein, when the first field indicates the number of activated codewords, When the number is 1, the first information may indicate that the number of uplink transmission layers is less than or equal to M; when the first field indicates that the number of activated codewords is 2, the first information may indicate that the uplink The number of transmission layers is greater than M. In this way, whether the number of uplink transmission layers is greater than M can be directly or indirectly indicated through the first information, and the indication method is relatively flexible.
  • the W precodes indicated by the first information may be M of the candidate precodes.
  • W candidate precodes among the candidate precodes the M candidate precodes may be the top M candidate precodes with first performance from high to low among the candidate precodes, and the W is less than or equal to M, so
  • the W is equal to the N, that is, the W precoders are the N precoders. This can indicate precoding with better performance to the terminal device.
  • the first performance may be, but is not limited to, signal to noise ratio (SNR), etc.
  • SNR signal to noise ratio
  • the first information may include first indication information, and the first indication information is used to indicate indices of the W candidate precodings. This saves instruction overhead.
  • the W precodes indicated by the first information may be the candidate precodes except M candidates. N-M candidate precodes among candidate precodes other than precoders. The N precodes may be the M candidate precodes and the N-M candidate precodes. Wherein, the M candidate precodes may be the top M candidate precodes with first performance from high to low among the candidate precodes, the N is greater than the M, and the W is equal to N-M. This ensures that precoding with better performance is indicated to the terminal device.
  • the first information includes second indication information
  • the second indication information is used to indicate indexes of the N-M candidate precodings.
  • the indication information indicates the index of part of the candidate precoding, which can save indication overhead.
  • this application provides a communication method, which can be applied to network equipment, a functional module in the network equipment, a processor or chip in the network equipment, etc.
  • the method may include: the network device determines the first information and sends the first information to the terminal device.
  • the first information is used to indicate W precodings and to indicate whether the number of uplink transmission layers is greater than M.
  • Whether the W precodes and the number of uplink transmission layers are greater than M is used by the terminal device to determine N precodes, so that the terminal device can determine whether the W precodes and the number of uplink transmission layers are greater than M.
  • the device sends uplink data.
  • the precoding indication of the actual number of uplink transmission layers can be flexibly adapted, so that the number of transmit antennas supported by the terminal device can be flexibly adapted to improve uplink transmission performance.
  • the instruction overhead is relatively small.
  • the network device may receive candidate precoding from the terminal device through resources used for uplink transmission, and in the candidate precoding Determine the W precoders.
  • the number of candidate precoders is related to the number of resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission. In this way, the network device can accurately select W precoding instructions among the candidate precodes sent by the terminal device and provide them to the terminal device.
  • the network device passes all The resource used for uplink transmission receives the candidate precoding from the terminal device.
  • the method may be: the network device receives a group of candidate precodes from the terminal device through A resources used for uplink transmission.
  • the A group of candidate precodings correspond to the A resources used for uplink transmission one-to-one; wherein the A group of candidate precodings are A*B candidate precodings sorted from high to low according to the first performance.
  • each group of candidate precoders contains B candidate precoders.
  • the A is a positive integer
  • the B is a positive integer. In this way, the network device can receive candidate precodes from the terminal device flexibly and accurately.
  • two sequentially adjacent candidate precoders may not be located in the same group, but may be located in adjacent groups.
  • the first performance may be, but is not limited to, SNR, etc.
  • the first information is used to indicate whether the number of uplink transmission layers is greater than M, which can be implemented by the following method: the first information can include a first bit, and the first bit indicates that the Whether the number of uplink transmission layers is greater than M; or, the first information may include a first field, the first field is used to indicate the number of activated codewords; wherein, when the first field indicates the number of activated codewords, When the number is 1, the first information indicates that the number of uplink transmission layers is less than or equal to M; when the first field indicates that the number of activated codewords is 2, the first information indicates that the uplink transmission layer The number is greater than M. In this way, it can be directly indicated through the first information or It indirectly indicates whether the number of uplink transmission layers is greater than M, and the indication method is relatively flexible.
  • the W precodes indicated by the first information may be M of the candidate precodes.
  • W candidate precodes among the candidate precodes the M candidate precodes may be the top M candidate precodes with first performance from high to low among the candidate precodes, and the W is less than or equal to M, so Said W is equal to said N. This can indicate precoding with better performance to the terminal device.
  • the first information may include first indication information, and the first indication information is used to indicate indices of the W candidate precodings. This saves instruction overhead.
  • the W precodes indicated by the first information may be the candidate precodes except M candidate precodes.
  • the first information may include second indication information, and the second indication information is used to indicate the indexes of the N-M candidate precodings. In this way, indication overhead can be saved by indicating the index of part of the candidate precoding.
  • this application also provides a communication device.
  • the communication device may be a terminal device, a processor, a chip or a functional module in the terminal device, etc.
  • the communication device has the ability to implement the above first aspect or the first aspect. functions of the terminal device in each possible design example.
  • the functions described 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 the above functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the terminal equipment in the above first aspect or each possible design example of the first aspect. For details, see the method examples. The detailed description in , will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
  • the processor is configured to support the communication device to perform corresponding functions of the terminal device in the above-mentioned first aspect or each possible design example of the first aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • this application also provides a communication device.
  • the communication device may be a network device, a processor, a chip or a functional module in the network device, etc.
  • the communication device has the ability to implement the above second aspect or the second aspect. functions of the terminal device in each possible design example.
  • the functions described 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 the above functions.
  • the structure of the communication device includes a transceiver unit and a processing unit. These units can perform the corresponding functions of the network equipment in the above second aspect or each possible design example of the second aspect. For details, see the method examples. The detailed description in , will not be repeated here.
  • the structure of the communication device includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information or data, and to communicate with other devices in the communication system.
  • the processor is configured to support the communication device to perform corresponding functions of the network device in the above second aspect or each possible design example of the second aspect.
  • the memory is coupled to the processor and holds program instructions and data necessary for the communications device.
  • embodiments of the present application provide a communication system, which may include a terminal device for performing the above first aspect or various possible design examples of the first aspect and a terminal device for performing the above second aspect or the second aspect. network devices, etc. in each possible design example.
  • embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its contents. Any possible design, or the method described in the second aspect and any possible design thereof.
  • computer-readable storage media can be any available media that can be accessed by a computer.
  • computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory
  • RAM random-access memory
  • ROM read-only memory
  • programmable read-only memory electrically EPROM, EEPROM
  • CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
  • embodiments of the present application provide a computer program product, including computer program code or instructions.
  • the computer program When the code or instruction is run on the computer, the method described in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect is executed.
  • the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the first step described above. aspect or any possible design of the first aspect, or the method described in the above-mentioned second aspect or any possible design of the second aspect.
  • Figure 1 is a schematic diagram of the architecture of a communication system provided by this application.
  • Figure 2 is a schematic diagram of the structure of a network device or terminal device provided by this application;
  • Figure 3 is a flow chart of a communication method provided by this application.
  • Figure 4 is a schematic structural diagram of a communication device provided by this application.
  • Figure 5 is a structural diagram of a communication device provided by this application.
  • Embodiments of the present application provide a communication method and device for flexibly performing precoding instructions, so as to be applicable to more transmitting antennas and uplink transmission layer terminal equipment, and to improve uplink transmission performance.
  • the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
  • the network device is a device with wireless transceiver function or a chip that can be installed on the network device.
  • Network equipment can also be called access network equipment, access node (AN), and wireless access node (radio access node, RAN).
  • the network equipment includes but is not limited to: base station (generation node B, gNB), wireless network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base station Transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, Wi-Fi) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc., can also be network nodes that constitute a gNB or transmission point, such as Baseband unit (BBU), or distributed unit (DU), etc
  • Terminal equipment can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment , user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, or an augmented reality (AR) terminal.
  • Terminal Equipment wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( Wireless terminals in transportation safety, wireless terminals in smart cities, smart wearable devices (smart glasses, smart watches, smart headphones, etc.), wireless terminals in smart homes, etc., can also be Chips or chip modules (or chip systems) that can be installed on the above devices.
  • the embodiments of this application do not limit application scenarios.
  • terminal equipment with wireless transceiver functions and chips or modules that can be installed in the aforementioned terminal equipment are collectively referred to as terminal equipment.
  • the number of uplink transmission layers refers to the number of uplink data streams, or the number of spatial streams.
  • the maximum number of uplink transmission layers is the rank of the MIMO channel matrix.
  • the rank of the MIMO channel matrix is the intermediate value obtained by performing transfer matrix singular value decomposition (SVD) on the MIMO channel matrix.
  • the number of diagonal elements (singular values) of a diagonal matrix is less than or equal to the number of transmit antennas of the terminal device, and the actual number of uplink transmission layers of the terminal device is less than or equal to the maximum number of uplink transmission layers of the terminal device.
  • the maximum number of uplink transmission layers of the terminal device is equal to the number of transmit antennas of the terminal device, and the number of transmit antennas of the terminal device is 8, then the maximum number of transmission layers corresponding to the number of transmit antennas of the terminal device is 8, and the number of uplink transmission layers of the terminal device is 8.
  • the number of transport layers can be any integer from 1 to 8.
  • At least one (species) refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species).
  • At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items.
  • at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the communication method provided by the embodiment of the present application can be applied to various communication systems, such as the fourth generation (4th generation, 4G) communication system (such as the Long Term Evolution (LTE) system), the fifth generation (5th generation, 5G) communication system, global interoperability for microwave access (WiMAX) or wireless local area network (WLAN) system, or a convergence system of multiple systems, or a future communication system, such as the sixth Generation (6th generation, 6G) communication system, etc.
  • the 5G communication system can also be called a new radio (NR) system.
  • the communication method provided by the embodiments of the present application can also be applied in scenarios such as wireless communication networks where uplink precoding indication can be used.
  • the communication process can occur between network devices and end devices.
  • FIG. 1 shows the architecture of a possible communication system to which the communication method provided by this application is applicable.
  • the communication system may include TRP1 and TRP2, and UE1 to UE5.
  • UE1 to UE5 can send uplink data, and the uplink data sent by UE1 to UE5 can be received by one of the TRPs.
  • UE1 and UE2 communicate with TRP1, and the uplink data sent by UE1 and UE2 are received by TRP1.
  • TRP1 may also send downlink data and/or information to UE1 and UE2.
  • UE5 communicates with TRP2.
  • the uplink data sent by UE5 is received by TRP2.
  • TRP2 can send downlink data and/or information to UE5.
  • the uplink data sent by UE1 to UE5 can also be jointly received by two TRPs at the same time.
  • UE3 and UE4 can communicate with TRP1 and TRP2 at the same time.
  • the uplink data sent by UE3 and UE4 can be jointly received by TRP1 and TRP2 at the same time.
  • TRP1 and TRP2 can also Downlink data and/or information may be sent to UE3 and UE4.
  • the number of uplink transmission streams and uplink precoding of each UE are calculated by the TRP (i.e., network equipment) side, and are indicated to each UE through downlink information.
  • the number and type of each device in the communication system shown in Figure 1 are only for illustration. The embodiments of the present application are not limited thereto. In actual applications, the communication system may also include more or fewer terminals. equipment, more or less network equipment, and may also include other network elements, such as core network elements, etc.
  • network device in Figure 1 is only TRP as an example. It should be understood that it can also be other types of network devices, which is not limited in this application.
  • the network equipment and terminal equipment involved in the embodiment of the present application may include the following modules:
  • Radio resource control (RRC) signaling interaction module a module used by network equipment and terminal equipment to send and receive RRC signaling. For example, the network equipment sends RRC signaling to the terminal equipment, and the terminal equipment receives RRC from the network equipment. signaling.
  • RRC Radio resource control
  • Media access control (media access control, MAC) signaling interaction module a module used by network equipment and terminal equipment to send and receive media access control (medium access control, MAC)-control element (CE) signaling , such as the network device sends MAC-CE signaling to the terminal device, and the terminal device receives the MAC-CE signaling from the network device.
  • media access control media access control
  • CE media access control
  • Physical layer (PHY) signaling and data interaction module a module used by network equipment and terminal equipment to send and receive uplink/downlink control signaling and uplink/downlink data.
  • the network device sends a physical downlink control channel (PDCCH), such as downlink control information (DCI) in the PDCCH, to the terminal device, and the network device sends a physical downlink shared channel (physical downlink shared) to the terminal device. channel, PDSCH), such as downlink data in PDSCH.
  • the terminal device sends a physical uplink control channel (PUCCH) to the network device, such as the uplink control information (UCI) in the PUCCH, and the terminal device sends a physical uplink shared channel (physical uplink shared channel) to the network device.
  • PUSCH physical uplink shared channel
  • modules shown in Figure 2 are only exemplary, and network equipment and terminal equipment may also include other communication modules, such as radio link control (RLC) modules, packet data convergence protocol (packet data convergence protocol). , PDCP) module, or service data adaptation protocol (service data adaptation protocol, SDAP) module, etc., the embodiments of this application do not specifically limit this.
  • RLC radio link control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • the 3GPP NR protocol supports two types of transmission modes for multi-antenna precoding for uplink transmission: codebook based UL transmission scheme (CB) and non-codebook based UL transmission mode (CB). transmission scheme, NCB).
  • CB codebook based UL transmission scheme
  • NCB non-codebook based UL transmission mode
  • the terminal device obtains the uplink channel information based on the CSI-RS sent by the network device and the channel reciprocity, then calculates multiple candidate precoders (precoder), and loads the multiple candidate precoders into the SRS resources are sent to the network device, and finally the network device indicates the selected precoding to the terminal device through SRI.
  • precoder multiple candidate precoders
  • the 3GPP NR R16 protocol supports SRI indication when the number of transmitting antennas of the terminal equipment is 2 transmitters (TX) and 4TX and when the maximum number of uplink transmission layers of the terminal equipment is 4.
  • the network device sends CSI-RS to the terminal device, and the terminal device estimates the downlink channel information and obtains the uplink channel information based on the reciprocity of the uplink and downlink channels.
  • the terminal device calculates four 4*1 candidate precoders based on the estimated uplink channel information, and loads the first N SRS precoder on the N SRS SRS resources and sends them to the network device.
  • the existing protocol stipulates that the maximum number of SRS resources configured for the NCB-based uplink transmission mode is 4, the N SRS value can be 2, 3, or 4, and each SRS resource has 1 port.
  • the network device receives the SRS sent by the terminal device and estimates the candidate precoder, then determines which precoder to use, and uses the SRI field in the downlink control information (DCI) to index the SRS resource corresponding to the selected precoder. Instructions to terminal equipment. After receiving the DCI, the terminal device locates the SRI indication table (table) and the corresponding columns according to the high-layer parameters N SRS and L max indicated by the RRC, such as Table 1 below.
  • DCI downlink control information
  • N SRS is the number of SRS resources used to upload candidate precoder in the NCB transmission specified by the network device
  • the terminal device determines the corresponding row according to the bit value of the SRI field, and uses the precoder corresponding to the row to perform PUSCH transmission.
  • the current 3GPP NR R16 protocol defines the SRI indication rules when the number of transmitting antennas of the terminal equipment is 2TX and 4TX, and the maximum number of uplink transmission layers of the terminal equipment is 4.
  • the number of transmitting antennas of terminal equipment is expected to increase to 8TX and above, and the maximum number of uplink transmission layers supported by each terminal equipment may exceed 4 layers. Therefore, the number of transmitting antennas of the terminal device may exceed the number of transmitting antennas of the terminal device supported by the indication method in the current protocol, and the number of uplink transmission layers may also exceed the number of uplink transmission layers of the terminal device supported by the indication method in the current protocol.
  • the above The indicated method cannot be supported and may cause uplink transmission to fail.
  • embodiments of this application propose a communication method that can be applied to more transmitting antennas and uplink transmission layer terminal equipment to improve uplink transmission performance.
  • the communication method provided by this application is described in detail by taking terminal equipment and network equipment as examples. It should be understood that the operations performed by the terminal equipment can also be performed by the processor in the terminal equipment, or by the chip. Or a chip system, or a functional module, etc. The operations performed by the network device can also be implemented by a processor in the network device, or a chip or chip system, or a functional module, etc. This application is not limited to this.
  • Step 301 The network device determines the first information.
  • the first information is used to indicate W precoding and whether the number of uplink transmission layers is greater than M.
  • the W is a positive integer
  • the M is a preset uplink transmission layer.
  • Transport layer threshold is a preset uplink transmission layer.
  • Step 302 The network device sends the first information to the terminal device.
  • the terminal device receives the first information from the network device.
  • Step 303 The terminal device determines N precodes based on the W precodes and whether the number of uplink transmission layers is greater than M, and sends uplink data based on the N precodes.
  • the N may be an integer greater than or equal to the W.
  • M can be 4, etc. It can also be understood that M is the maximum number of uplink transmission layers supported by the terminal device described above, 4. Of course, it should be understood that M can also take other values, which is not limited in this application.
  • the terminal device may determine candidate precodes, and the number of candidate precodes may be the same as the number of resources used for uplink transmission. The number is related to the number of ports corresponding to the resources used for uplink transmission. Afterwards, the terminal device may send the candidate precoding to the network device through the resource for uplink transmission, and accordingly, the network device may obtain the candidate precode from the terminal device through the resource for uplink transmission. The candidate precode is received. Furthermore, the network device may determine the W precodes among the candidate precodes.
  • the network device sends a downlink reference signal for channel measurement to the terminal device, and the terminal device can determine the candidate precoding according to the downlink reference signal and channel reciprocity.
  • the downlink reference signal may be, but is not limited to, a channel state information reference signal (channel state information reference signal, CSI-RS), etc.
  • the number of candidate precoders may be A*B, and the A is a positive integer, and B is a positive integer.
  • the resources used for uplink transmission may be, but are not limited to, uplink reference signal resources, such as, but are not limited to, SRS resources.
  • the number of candidate precoders may be 8.
  • the number of candidate precoders may be 8.
  • the terminal device sends the candidate precoding to the network device through the resource used for uplink transmission.
  • the method may be as follows: the terminal device may send A*B candidates The precodes are sorted from high to low according to the first performance. Then, the terminal device can divide the sorted A*B candidate precodes into a group of candidate precodes in the sort order, and each group of candidate precodes contains B candidate precodes; finally, the terminal device may send the A group of candidate precodes to the network device through A resources for uplink transmission, and the A group of candidate precodes are consistent with the A group of candidate precodes. Resources used for uplink transmission correspond one to one.
  • two sequentially adjacent candidate precoders may not be located in the same group, but may be located in adjacent groups.
  • the first performance may be, but is not limited to, signal to noise ratio (SNR), etc.
  • SNR signal to noise ratio
  • the indexes of the candidate precoders may be 0, 1, 2, 3, 4, 5, 6, and 7.
  • the above eight candidate precoders can be divided into four groups, namely ⁇ 0, 4 ⁇ , ⁇ 1, 5 ⁇ , ⁇ 2, 6 ⁇ and ⁇ 3, 7 ⁇ , and then the terminal device can divide the above four groups of candidates into The precoding is loaded onto SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3 respectively and sent to the network device.
  • the terminal device may send the above candidate precoding ⁇ 0, 4 ⁇ to the network device through SRS resource 0.
  • the indexes of the candidate precoders may be 0, 1, 2, 3, 4, 5, 6, and 7.
  • the above eight candidate precoders can be divided into eight groups, namely ⁇ 0 ⁇ , ⁇ 1 ⁇ , ⁇ 2 ⁇ , ⁇ 3 ⁇ , ⁇ 4 ⁇ , ⁇ 5 ⁇ , ⁇ 6 ⁇ , ⁇ 7 ⁇ , and then
  • the terminal device can load the above eight sets of candidate precodes onto SRS resources 0 to 7 respectively and send them to the network device. For example, the terminal device may send the above candidate precoding ⁇ 0 ⁇ to the network device through SRS resource 0.
  • each group of candidate precodings contains 1 candidate precoding.
  • the terminal device may not perform candidate precoding.
  • the sorted 8 candidate precodes can be directly loaded into SRS resources 0 to 7 respectively and sent to the network device.
  • the index of the candidate precoding or the index number of the SRS resource all starts with 0. Alternatively, it can also start with 1. Initially, this application does not limit this.
  • the first information may indicate whether the number of uplink transmission layers is greater than M in the following manner:
  • the first information may include a first bit, and the first bit indicates whether the number of uplink transmission layers is greater than M.
  • the first bit may include 1 bit, which directly indicates whether the number of uplink transmission layers is greater than M. For example, if the value of this 1 bit is a first value, the first information may indicate that the number of uplink transmission layers is less than or equal to M, and if the value of this 1 bit is a second value, the first information may indicate that the number of uplink transmission layers may be The number of transmission layers is greater than M.
  • the first value may be 0 and the second value may be 1; or the first value may be 1 and the second value may be 0; or the first value and the second value may have other values. This application is concerned with the third value.
  • the first value and the second value are not limited.
  • the first information may include a first field, and the first field may be used to indicate the number of activated codewords; when the first field indicates that the number of activated codewords is 1, The first information may indicate that the number of uplink transmission layers is less than or equal to M; when the first field indicates that the number of activated codewords is 2, the first information may indicate that the number of uplink transmission layers is greater than M .
  • the first field may be, but is not limited to, a field such as modulation and coding scheme (modulation and coding scheme, MCS), redundancy version (redundancy version, RV) or NDI.
  • MCS modulation and coding scheme
  • RV redundancy version
  • NDI NDI
  • the first information may be downlink control information (DCI), or the first information may also be carried in the DCI, which is not limited in this application.
  • DCI downlink control information
  • the W precoders indicated by the first information may be the candidates.
  • W candidate precodes among the M candidate precodes in the precoding the M candidate precodes may be the top M candidate precodes with the first performance from high to low among the candidate precodes, the W Less than or equal to the M, the W is equal to the N. That is to say, when the number of uplink transmission layers is less than or equal to M, the N precodes determined by the terminal device are the W precodes indicated by the first information.
  • N precodes (that is, the W precodes) can be sorted in descending order by SNR.
  • N of the first four candidate precodes that is, the N precodes can be N of the candidate precodes with indexes 0, 1, 2, and 3. In this case, N is less than or equal to 4.
  • the first information may include first indication information, and the first indication information may be used to indicate indices of the W candidate precodings.
  • the method for indicating the indexes of the W candidate precodings by the first indication information may reuse the aforementioned indication method combined with Table 1.
  • the W precodes indicated by the first information may be the candidate precodes except N-M candidate precodes among candidate precodes other than M candidate precodes, the N precodes may be the M candidate precodes and the N-M candidate precodes; the M candidate precodes are still It may be the top M candidate precodes with first performance from high to low among the candidate precodes, the N is greater than the M, and the W is equal to N-M.
  • the N precodes may include the first 4 candidate precodes sorted by SNR in descending order, For example, N precodes may include candidate precodes with indexes 0, 1, 2, and 3. And, the remaining N-4 candidate precodes are N-4 of the candidate precodes other than the above-mentioned 4 candidate precodes, for example, N-4 of the candidate precodes with indexes 4, 5, 6, and 7. 4, N is greater than 4 at this time.
  • the first information may include second indication information, and the second indication information is used to indicate the indexes of the N-M candidate precodings.
  • the candidate precode corresponding to the index obtained by the first index + M may be used as the N-M candidate precodes.
  • the first index may be indicated by the second indication information, and the first index may be the index of the candidate precoding indicated by the indication method in combination with Table 1.
  • the second indication information indicates the row with index (index) 7 in Table 1, That is to say, the second indication information indicates the candidate precodings with indexes 1 and 2.
  • the candidate precodings with indexes 1+M and 2+M are the N-M ones implicitly indicated by the second indication information.
  • Candidate precoders Assuming that M is 4, the N precoders are candidate precoders with indexes 0, 1, 2, 3, 5, and 6.
  • the network device can directly indicate N predetermined times according to the existing method. Coding, that is, directly combined with Table 1 to indicate the selected precoding.
  • the above method can be flexibly adapted to the precoding indication of the actual number of uplink transmission layers, thereby flexibly adapting to the number of transmit antennas supported by the terminal device and improving uplink transmission performance.
  • the instruction overhead is relatively small.
  • the communication device 400 may include a transceiver unit 401 and a processing unit 402 .
  • the transceiver unit 401 is used for communicating with the communication device 400 , such as receiving information, messages or data, etc., or sending information, messages or data, etc.
  • the processing unit 402 is used for processing the communication device 400 . Actions are controlled and managed.
  • the processing unit 402 can also control the steps performed by the transceiver unit 401.
  • the communication device 400 may be the terminal device in the above embodiment, a processor of the terminal device, a chip, a chip system, a functional module, etc.
  • the communication device 400 may specifically be the network device in the above embodiment, the processor of the network device, or a chip, or a chip system, or a functional module, etc.
  • the transceiver unit 401 can be used to receive first information from a network device, where the first information is used to indicate W precoding, and used to indicate whether the number of uplink transmission layers is greater than M, where W is a positive integer, and M is a preset threshold for the number of uplink transmission layers; the processing unit 402 may be used to perform precoding according to the W precoding and whether the number of uplink transmission layers is greater than M, determine N precodes; the transceiver unit 401 may also be used to send uplink data based on the N precodes.
  • the N may be an integer greater than or equal to the W.
  • the processing unit 402 may also be configured to: before the transceiver unit 401 receives the first information from the network device, determine a candidate precoding.
  • the number is related to the number of resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission;
  • the transceiver unit 401 may also be configured to send the candidate precoding to the network device through the resource used for uplink transmission. Wherein, the W candidate precodes and the N precodes are both included in the candidate precodes.
  • the number of candidate precoders is A*B, where A is a positive integer, and B is positive integer;
  • processing unit 402 may also be used to sort the A*B candidate precodes from high to low according to the first performance; and divide the sorted A*B candidate precodes into group A according to the sorting order.
  • candidate precoders each group of candidate precoders contains B candidate precoders;
  • the transceiver unit 401 When the transceiver unit 401 sends the candidate precodes to the network device through the resources for uplink transmission, it may be specifically configured to: pass the A group of candidate precodes through A resources for uplink transmission respectively. Sent to the network device, the A group of candidate precodes corresponds one-to-one to the A resources used for uplink transmission.
  • the first information is used to indicate whether the number of uplink transmission layers is greater than M, which may include: the first information includes a first bit, the first bit indicates whether the number of uplink transmission layers is greater than M. ; Or, the first information includes a first field, and the first field is used to indicate the number of activated codewords; when the first field indicates that the number of activated codewords is 1, the first information Indicates that the number of uplink transmission layers is less than or equal to M; when the first field indicates that the number of activated codewords is 2, the first information indicates that the number of uplink transmission layers is greater than M.
  • the W precodes indicated by the first information may be the M candidate precodes among the candidate precodes.
  • W candidate precodes in encoding the M candidate precodes may be the top M candidate precodes with first performance from high to low among the candidate precodes, and the W is less than or equal to the M, so Said N is equal to said W.
  • the first information may include first indication information, and the first indication information is used to indicate indices of the W candidate precodings.
  • the W precodes indicated by the first information may be the candidate precodes except M candidate precodes.
  • N-M candidate precodes among candidate precodes other than coding the N precodes may be the M candidate precodes and the N-M candidate precodes; the M candidate precodes may be the candidate The first M candidate precodes with first performance in precoding from high to low, and the N is greater than the M.
  • the first information may include second indication information, and the second indication information is used to indicate the indexes of the N-M candidate precodings.
  • the processing unit 402 can be used to determine the first information, the first information is used to indicate W precoding , and used to indicate whether the number of uplink transmission layers is greater than M, the W is a positive integer, and the M is the preset threshold of the number of uplink transmission layers; whether the W precoding and the number of uplink transmission layers are greater than M are used
  • the N precodes are used by the terminal device to send uplink data; the N is an integer greater than or equal to the W; the transceiver unit 401 may be used to send the terminal device the The first information enables the terminal device to determine N precodes based on the W precodes and whether the number of uplink transmission layers is greater than M.
  • the transceiver unit 401 may also be configured to: before the processing unit 402 determines the first information, receive candidate precoding from the terminal device through resources used for uplink transmission; the candidate precoding The number of is related to the number of resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission; the processing unit 402 may also be used to determine the W precodings among the candidate precodings .
  • the number of candidate precoders is A*B, where A is a positive integer, and B is a positive integer; furthermore, when the transceiver unit 401 receives the candidate precoding from the terminal device through the resource for uplink transmission, it may be configured to: respectively receive the candidate precoding from the terminal device through A resources for uplink transmission.
  • the terminal equipment receives a group of candidate precodes, which correspond one-to-one to the A resources used for uplink transmission; wherein the group of candidate precodes are sorted from high to low according to the first performance
  • the final A*B candidate precoders are divided into sorting order, and each group of candidate precoders contains B candidate precoders.
  • the first information is used to indicate whether the number of uplink transmission layers is greater than M, which may include: the first information includes a first bit, and the first bit indicates the uplink transmission layer. Whether the number is greater than M; or, the first information includes a first field, the first field is used to indicate the number of activated codewords; when the first field indicates that the number of activated codewords is 1, the The first information indicates that the number of uplink transmission layers is less than or equal to M; when the first field indicates that the number of activated codewords is 2, the first information indicates that the number of uplink transmission layers is greater than M.
  • the W precodes indicated by the first information may be M candidates among the candidate precodes.
  • W candidate precodes among the precoders the M candidate precoders may be the top M candidate precoders with first performance from high to low among the candidate precoders, and the W is less than or equal to the M, The N is equal to the W.
  • the first information may include first indication information, and the first indication information is used to indicate indices of the W candidate precodings.
  • the W precodes indicated by the first information may be other than M candidates among the candidate precodes.
  • N-M candidate precodes among candidate precodes other than precoding the N precodes may be the M candidate precodes and the N-M candidate precodes; the M candidate precodes may be the Among the candidate precoders, the first M candidate precoders with first performance from high to low, where the N is greater than the M.
  • the first information may include second indication information, and the second indication information is used to indicate the indexes of the N-M candidate precodings.
  • each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
  • the communication device 500 may include a transceiver 501 and a processor 502 .
  • the communication device 500 may also include a memory 503.
  • the memory 503 may be disposed inside the communication device 500 or may be disposed outside the communication device 500 .
  • the processor 502 can control the transceiver 501 to receive and send messages, information, messages or data, etc.
  • the processor 502 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.
  • the processor 502 may further include hardware chips.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
  • the transceiver 501, the processor 502 and the memory 503 are connected to each other.
  • the transceiver 501, the processor 502 and the memory 503 are connected to each other through a bus 504;
  • the bus 504 may be a Peripheral Component Interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 5, but it does not mean that there is only one bus or one type of bus.
  • the memory 503 is used to store programs, etc.
  • the program may include program code including computer operating instructions.
  • the memory 503 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories.
  • the processor 502 executes the application program stored in the memory 503 to implement the above functions, thereby realizing the functions of the communication device 500 .
  • the communication device 500 may be the terminal device in the above embodiment; it may also be the network device in the above embodiment.
  • the transceiver 501 can implement the sending and receiving operations performed by the terminal device in the above embodiment; the processor 502 can implement the functions in the above embodiment. Operations other than sending and receiving operations performed by the terminal device.
  • the transceiver 501 can implement the sending and receiving operations performed by the terminal device in the above embodiment; the processor 502 can implement the functions in the above embodiment. Operations other than sending and receiving operations performed by the terminal device.
  • the transceiver 501 can implement the sending and receiving operations performed by the network device in the above embodiment; the processor 502 can implement the above embodiment. Operations other than sending and receiving operations performed by network devices.
  • the relevant descriptions please refer to the relevant descriptions in the embodiment shown in FIG. 3 , and will not be introduced in detail here.
  • embodiments of the present application provide a communication system, which may include the terminal equipment and network equipment involved in the above embodiments.
  • Embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement what is provided by the embodiment shown in Figure 3. method.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the method provided by the embodiment shown in FIG. 3 .
  • An embodiment of the present application also provides a chip, including a processor, which is coupled to a memory and configured to call a program in the memory so that the chip implements the method provided by the embodiment shown in FIG. 3 .
  • An embodiment of the present application also provides a chip, the chip is coupled to a memory, and the chip is used to implement the method provided by the embodiment shown in FIG. 3 .
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication, destinés à être utilisés pour indiquer de manière flexible des précodeurs de façon à être appropriés pour un dispositif terminal présentant plus d'antennes de transmission et de couches de transmission de liaison montante, ce qui permet d'améliorer les performances de transmission de liaison montante. Un dispositif de réseau détermine des premières informations et envoie les premières informations à un dispositif terminal, de sorte que le dispositif terminal détermine N précodeurs selon des précodeurs indiqués par les premières informations et détermine si le nombre de couches de transmission de liaison montante indiquées est supérieur à M, et envoie des données de liaison montante sur la base des N précodeurs. M est un seuil prédéfini du nombre de couches de transmission de liaison montante. De cette manière, une indication de précodeur du nombre réel de couches de transmission peut être adaptée de manière flexible, de sorte que le nombre d'antennes de transmission prises en charge par le dispositif terminal peut être adapté de manière flexible, ce qui permet d'améliorer les performances de transmission de liaison montante. En outre, le surdébit d'indication est relativement petit.
PCT/CN2023/103493 2022-07-22 2023-06-28 Procédé et appareil de communication WO2024016979A1 (fr)

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Citations (5)

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US9450658B1 (en) * 2015-08-06 2016-09-20 Mediatek Inc. Method for transmitting extra spatial layers over the wireless channel
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CN111278120A (zh) * 2019-01-11 2020-06-12 维沃移动通信有限公司 上行信道的配置方法、传输方法、网络侧设备及终端
US20210013936A1 (en) * 2018-04-04 2021-01-14 Huawei Technologies Co, Ltd. Uplink Antenna Selection Method and Apparatus
WO2022000262A1 (fr) * 2020-06-30 2022-01-06 Zte Corporation Systèmes et procédés pour déterminer des informations de transmission

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9450658B1 (en) * 2015-08-06 2016-09-20 Mediatek Inc. Method for transmitting extra spatial layers over the wireless channel
US20210013936A1 (en) * 2018-04-04 2021-01-14 Huawei Technologies Co, Ltd. Uplink Antenna Selection Method and Apparatus
CN111278120A (zh) * 2019-01-11 2020-06-12 维沃移动通信有限公司 上行信道的配置方法、传输方法、网络侧设备及终端
CN111130607A (zh) * 2019-12-26 2020-05-08 中兴通讯股份有限公司 上行传输、信号接收方法、装置、终端、服务节点及介质
WO2022000262A1 (fr) * 2020-06-30 2022-01-06 Zte Corporation Systèmes et procédés pour déterminer des informations de transmission

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