CN117498901A - Communication method and device - Google Patents

Communication method and device Download PDF

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Publication number
CN117498901A
CN117498901A CN202210867372.9A CN202210867372A CN117498901A CN 117498901 A CN117498901 A CN 117498901A CN 202210867372 A CN202210867372 A CN 202210867372A CN 117498901 A CN117498901 A CN 117498901A
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China
Prior art keywords
candidate
precodes
uplink transmission
information
precoding
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CN202210867372.9A
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Chinese (zh)
Inventor
徐军
高君慧
金黄平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202210867372.9A priority Critical patent/CN117498901A/en
Priority to PCT/CN2023/103493 priority patent/WO2024016979A1/en
Publication of CN117498901A publication Critical patent/CN117498901A/en
Pending legal-status Critical Current

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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
    • 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

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

Abstract

A communication method and device are used for flexibly indicating precoding so as to be suitable for terminal equipment with more transmitting antennas and uplink transmission layers and improve uplink transmission performance. The network equipment determines first information, sends the first information to the terminal equipment, so that the terminal equipment determines N precoding according to W precoding indicated by the first information and whether the indicated uplink transmission layer number is larger than M, and sends uplink data based on the N precoding. M is a preset uplink transmission layer number threshold. Therefore, the precoding indication method and the precoding indication device can be flexibly adapted to the precoding indication of the actual uplink transmission layer number, so that the number of the transmitting antennas supported by the terminal equipment can be flexibly adapted, and the uplink transmission performance is improved. While the indication overhead is relatively small.

Description

Communication method and device
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a communications method and apparatus.
Background
The fifth generation (the 5th generation,5G) mobile communication system has high requirements on system capacity, spectrum efficiency and the like. In a 5G communication system, application of large-scale multiple-input multiple-output (massive-MIMO) technology plays a crucial role in improving the spectral efficiency of the system. By using the massive-MIMO technology, the terminal equipment needs to pre-encode data when sending uplink data. Multiple antenna precoding for uplink transmission may support multiple types of transmission modes, for example, one common transmission mode is non-codebook based uplink transmission mode (non-codebook based UL transmission scheme, NCB).
For the NCB uplink transmission mode, the terminal equipment acquires uplink channel information according to a channel state information reference signal (channel state information reference signal, CSI-RS) and channel reciprocity sent by the network equipment, further calculates a plurality of candidate precoding (precoders), loads the plurality of candidate precoding on sounding reference signal (sounding reference signal, SRS) resources and sends the sounding reference signal to the network equipment, and finally the network equipment indicates the selected precoding to the terminal equipment through SRS resource indication (SRS resource indicator, SRI).
However, the indication mode of the current network device can only be applied to terminal devices with limited number of transmitting antennas and limited number of uplink transmission layers, namely, the supported transmitting antennas and limited number of uplink transmission layers. As the capacity requirement of the communication system on the uplink system is higher and higher, the number of transmitting antennas and the number of uplink transmission layers supported by the terminal device are also higher and higher, and the existing indication mode obviously cannot be supported, which may cause uplink transmission failure.
Disclosure of Invention
The application provides a communication method and a communication device, which are used for flexibly carrying out precoding indication so as to be suitable for terminal equipment with more transmitting antennas and uplink transmission layers and improve uplink transmission performance.
In a first aspect, the present application provides a communication method, which may be applied to a terminal device, a functional module in a terminal device, a processor or a chip in a terminal device, etc. Taking application to a terminal device as an example, the method may include: the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating W precoding and indicating whether the uplink transmission layer number is larger than M; further, the terminal device may determine N precodes according to whether the W precodes and the uplink transmission layer number are greater than M, and transmit uplink data based on the N precodes. Wherein W is a positive integer, M is a preset uplink transmission layer number threshold, and N is an integer greater than or equal to W.
By the method, the precoding indication of the actual uplink transmission layer number can be flexibly adapted, so that the number of the transmitting antennas supported by the terminal equipment can be flexibly adapted, and the uplink transmission performance is improved. While the indication overhead is relatively small.
In one possible design, before the terminal device receives the first information from the network device, the terminal device may determine a candidate precoding and send the candidate precoding to the network device through a resource for uplink transmission, where the number of candidate precoding is related to the number of resources for uplink transmission and the number of ports corresponding to the resource for uplink transmission; the W precoded codes and the N precoded codes are both included in the candidate precoded codes. In this way, the network device can be enabled to accurately select W precodes among the candidate precodes to indicate to the terminal device.
In one possible design, when the number of resources used for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b; furthermore, the terminal device sends the candidate precoding to the network device through the resource for uplink transmission, and the method may be: the terminal equipment sorts the A.B candidate precoding according to the first performance from high to low; then, the terminal equipment divides the ordered A.times.B candidate precoders into A groups of candidate precoders according to the ordering sequence, wherein each group of candidate precoders comprises B candidate precoders; and finally, the terminal equipment sends the A group candidate precoding to the network equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one. Wherein A is a positive integer, and B is a positive integer. In this way, the terminal device can flexibly and accurately send the determined candidate precoding to the network device.
In one possible design, two candidate precoders that are sequentially adjacent are not located in the same group, and are located in adjacent groups.
In one possible design, the first information is used to indicate whether the uplink transmission layer number is greater than M, and may be implemented by the following method: the first information may include a first bit indicating whether the uplink transmission layer number is greater than M; alternatively, the first information may include a first field for indicating the number of activated codewords; when the number of activated codewords indicated by the first field is 1, the first information may indicate that the uplink transmission layer number 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 transmission layer number is greater than M. Therefore, whether the uplink transmission layer number is larger than M can be indicated directly or indirectly through the first information, and the indication mode is flexible.
In one possible design, when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precoders indicated by the first information may be W candidate precoders out of M candidate precoders, where the M candidate precoders may be first M candidate precoders with first performance from high to low in the candidate precoders, where W is less than or equal to M, and where W is equal to N, that is, the W precoders are the N precoders. This may indicate to the terminal device a better performing precoding.
Illustratively, the first performance may be, but is not limited to being, a signal-to-noise ratio (signal to noise ratio, SNR), or the like.
In one possible design, the first information may include first indication information for indicating indexes of the W candidate precodes. This saves the indication overhead.
In another possible design, when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information may be N-M candidate precoders out of the candidate precoders except for the M candidate precoders. The N precodes may be the M candidate precodes and the N-M candidate precodes. The M candidate precodes may be first M candidate precodes with a first performance from high to low in the candidate precodes, where N is greater than M, and W is equal to N-M. In this way, better precoding performance can be ensured to be indicated to the terminal equipment.
In one possible design, the first information includes second indication information indicating indexes of the N-M candidate precodes. Thus, the indication information indicates the index of the partial candidate precoding, so that the indication overhead can be saved.
In a second aspect, the present application provides a communication method, which may be applied to a network device, a functional module in a network device, a processor or a chip in a network device, or the like. For example, the method may include: the network device determines first information and sends the first information to the terminal device. The first information is used for indicating W precoding and indicating whether the uplink transmission layer number is larger than M. The W precoding and the uplink transmission layer number are larger than M and are used for a terminal device to determine N precoding, so that the terminal device can determine the N precoding according to the W precoding and the uplink transmission layer number are larger than M; the W is a positive integer, the M is a preset uplink transmission layer number threshold value, and the N is an integer greater than or equal to the W; the N precoded codes are used for the terminal device to transmit uplink data.
By the method, the precoding indication of the actual uplink transmission layer number can be flexibly adapted, so that the number of the transmitting antennas supported by the terminal equipment can be flexibly adapted, and the uplink transmission performance is improved. While the indication overhead is relatively small.
In one possible design, before the network device determines the first information, the network device may receive candidate precodes from the terminal device through a resource for uplink transmission, and determine the W precodes among the candidate precodes. The number of the candidate precoded codes is related to the number of the 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 from the candidate precoding sent by the terminal device.
In one possible design, when the number of resources used for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b; furthermore, the network device receives the candidate precoding from the terminal device through the resource for uplink transmission, and the method may be: the network equipment receives A group candidate precoding from the terminal equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one; the A group of candidate precoding is divided into A, B and B candidate precoding after being ranked from high to low according to the first performance according to the ranking order, and each group of candidate precoding comprises B candidate precoding. The A is a positive integer, and the B is a positive integer. In this way, the network device can flexibly and accurately receive candidate precodes from the terminal device.
In one possible design, two candidate precoders that are sequentially adjacent may not be located in the same group, and are located in adjacent groups.
Illustratively, the first performance may be, but is not limited to being, SNR, etc.
In one possible design, the first information is used to indicate whether the uplink transmission layer number is greater than M, and may be implemented by the following method: the first information may include a first bit indicating whether the uplink transmission layer number is greater than M; alternatively, the first information may include a first field for indicating the number of activated codewords; when the number of the activated codewords indicated by the first field is 1, the first information indicates that the uplink transmission layer number 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 number is greater than M. Therefore, whether the uplink transmission layer number is larger than M can be indicated directly or indirectly through the first information, and the indication mode is flexible.
In one possible design, when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precoders indicated by the first information may be W candidate precoders out of M candidate precoders, where the M candidate precoders may be first M candidate precoders with a first performance from high to low in the candidate precoders, where W is less than or equal to M, and where W is equal to the N. This may indicate to the terminal device a better performing precoding.
In one possible design, the first information may include first indication information for indicating indexes of the W candidate precodes. This saves the indication overhead.
In one possible design, when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information may be N-M candidate precoders out of the candidate precoders except for M candidate precoders; the N precoded codes may be the M candidate precoded codes and the N-M candidate precoded codes; the M candidate precodes may be first M candidate precodes of the candidate precodes with a first performance from high to low, where N is greater than M and W is equal to N-M. In this way, better precoding performance can be ensured to be indicated to the terminal equipment.
In one possible design, the first information may include second indicating information indicating indexes of the N-M candidate precodes. Thus, by indicating the index of the partial candidate precoding, the indication overhead can be saved.
In a third aspect, the present application further provides a communication apparatus, which may be a terminal device, a processor, a chip or a functional module in a terminal device, or the like, having a function of implementing the terminal device in the above first aspect or in each possible design example of the first aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.
In one possible design, the structure of the communication apparatus includes a transceiver unit and a processing unit, where these units may perform the corresponding functions of the terminal device in the foregoing first aspect or each possible design example of the first aspect, and detailed descriptions in method examples are specifically referred to and are not repeated herein.
In one possible design, the structure of the communication apparatus includes a transceiver and a processor, and optionally further includes a memory, where the transceiver is configured to receive and transmit information or data, and to perform communication interaction with other devices in the communication system, and the processor is configured to support the communication apparatus to perform the corresponding function of the terminal device in the foregoing first aspect or each possible design example of the first aspect. The memory is coupled to the processor that holds the program instructions and data necessary for the communication device.
In a fourth aspect, the present application further provides a communication apparatus, which may be a network device, a processor, a chip or a functional module in the network device, and the communication apparatus has a function of implementing the terminal device in the second aspect or each possible design example of the second aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.
In one possible design, the structure of the communication apparatus includes a transceiver unit and a processing unit, where these units may perform corresponding functions of the network device in the foregoing second aspect or each possible design example of the second aspect, and detailed descriptions in method examples are specifically referred to and are not repeated herein.
In one possible design, the structure of the communication apparatus includes a transceiver and a processor, and optionally further includes a memory, where the transceiver is configured to receive and transmit information or data, and to interact with other devices in the communication system, and the processor is configured to support the communication apparatus to perform the corresponding function of the network device in the foregoing second aspect or each possible design example of the second aspect. The memory is coupled to the processor that holds the program instructions and data necessary for the communication device.
In a fifth aspect, embodiments of the present application provide a communication system, which may include a terminal device for performing the foregoing first aspect or each possible design example of the first aspect, and a network device for performing the foregoing second aspect or each possible design example of the second aspect, and so on.
In a sixth aspect, embodiments of the present application provide a computer readable storage medium storing program instructions that, when run on a computer, cause the computer to perform the method described in the first aspect of the embodiments of the present application and any one of the possible designs thereof, or in the second aspect and any one of the possible designs thereof. By way of example, computer-readable storage media can be any available media that can be accessed by a computer. Taking this as an example but not limited to: the computer readable medium may include non-transitory computer readable media, random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
In a seventh aspect, embodiments of the present application provide a computer program product comprising computer program code or instructions which, when run on a computer, cause the method described in the first aspect or any one of the possible designs of the second aspect or the second aspect to be performed.
In an eighth aspect, the present application further provides a chip comprising a processor, the processor being configured to be coupled to a memory, and to read and execute program instructions stored in the memory, so that the chip implements the method described in the first aspect or any one of the possible designs of the first aspect, or the second aspect or any one of the possible designs of the second aspect.
The technical effects of each of the third to eighth aspects and the technical effects that may be achieved by each of the aspects are referred to the above description of each of the possible aspects of the first aspect or the first aspect, or the technical effects that may be achieved by each of the possible aspects of the second aspect or the second aspect, and the detailed description is not repeated here.
Drawings
Fig. 1 is a schematic architecture diagram of a communication system provided in the present application;
fig. 2 is a schematic diagram of a structure of a network device or a terminal device provided in the present application;
FIG. 3 is a flow chart of a communication method provided herein;
fig. 4 is a schematic structural diagram of a communication device provided in the present application;
fig. 5 is a block diagram of a communication device provided in the present application.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings.
The embodiment of the application provides a communication method and device for flexibly indicating precoding, which are suitable for terminal equipment with more transmitting antennas and uplink transmission layers and improve uplink transmission performance. The method and the device described in the present application are based on the same technical concept, and because the principles of solving the 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 repetition is not repeated.
For ease of understanding, some terms relating to embodiments of the present application are described below.
1) The network device is a device having a wireless transmitting/receiving function or a chip or the like which can be provided in the network device. The network device may also be referred to as AN access network device, access Node (AN), radio access node (radio access node, RAN). The network devices include, but are not limited to: base stations (generation Node B, gNB), radio network controllers (radio network controller, RNC), node bs (Node bs, NB), base station controllers (base station controller, BSC), base transceiver stations (base transceiver station, BTS), home base stations (e.g., home evolved NodeB, or home Node bs, HNB), base Band Units (BBU), access Points (APs) in wireless fidelity (wireless fidelity, wi-Fi) systems, wireless relay nodes, wireless backhaul nodes, transmission points (transmission and reception point, TRP, transmission point, TP), etc., as well as network nodes constituting the gNB or transmission points, such as baseband units (BBU), or Distributed Units (DUs), etc.
2) A terminal device can also be called a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart wearable device (smart glasses, smart watches, smart headphones, etc.), a wireless terminal in smart home (smart home), or the like, or may be a chip or a chip module (or chip system) that can be set in the above device. The embodiments of the present application are not limited to application scenarios. In the present application, a terminal device having a wireless transmitting/receiving function, a chip or a module which can be provided in the terminal device, and the like are collectively referred to as a terminal device.
3) The uplink transport layer number refers to the number of streams of uplink data, or referred to as spatial stream number. For spatial multiplexing, the maximum uplink transmission layer number is the rank (rank) of the MIMO channel matrix, which is the number of diagonal elements (singular values) of the intermediate diagonal matrix obtained by performing transition matrix singular value decomposition (singular value decomposition, SVD) on the MIMO channel matrix. In general, the maximum uplink transmission layer number of the terminal device is less than or equal to the number of transmitting antennas of the terminal device, and the actual uplink transmission layer number of the terminal device is less than or equal to the maximum uplink transmission layer number of the terminal device. For example, the maximum uplink transmission layer number of the terminal device is equal to the number of transmitting antennas of the terminal device, and the number of transmitting antennas of the terminal device is 8, so that the maximum transmission layer number corresponding to the number of transmitting antennas of the terminal device is 8, and the uplink transmission layer number of the terminal device may be any integer from 1 to 8.
4) In the description of this application, the words "first," "second," and the like are used solely for the purpose of distinguishing between descriptions and not necessarily for the purpose of indicating or implying a relative importance or order.
5) In the description herein, "at least one species" means one species or a plurality of species, and a plurality of species means two species or more than two species. "at least one of the following" or similar expressions thereof, means any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c may be single or plural.
6) In the description of the present application, "and/or", describing the association relationship of the association object, it means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone, wherein A, B may be singular or plural. "/" means "OR", e.g., a/b means a or b.
In order to describe the technical solution of the embodiments of the present application more clearly, the following describes the communication method and the device provided in the embodiments of the present application in detail with reference to the accompanying drawings.
The communication method provided in the embodiments of the present application may be applied to various communication systems, for example, a fourth generation (4th generation,4G) communication system (for example, a long term evolution (Long Term Evolution, LTE) system), a fifth generation (5th generation,5G) communication system, a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) or wireless local area network (wireless local area network, WLAN) system, or a fusion system of multiple systems, or a future communication system, for example, a sixth generation (6th generation,6G) communication system, and so on. Among other things, the 5G communication system may also be referred to as a New Radio (NR) system. The communication method provided by the embodiment of the application can also be applied to the scenes such as wireless communication networks which can adopt uplink precoding indication. The communication process may take place between a network device and a terminal device.
By way of example, fig. 1 illustrates the architecture of one possible communication system to which the communication method provided herein is applicable. TRP1 and TRP2, and UE1 to UE5 may be included in the communication system. Wherein, UE 1-UE 5 may send uplink data, and UE 1-UE 5 may send uplink data to be received by one of the TRPs, e.g., as shown in fig. 1, UE1 and UE2 communicate with TRP1, and UE1 and UE2 send uplink data to be received by TRP1, and TRP1 may also send downlink data and/or information to UE1 and UE 2. UE5 communicates with TRP2, and the uplink data sent by UE5 is received by TRP2, and TRP2 may send downlink data and/or information to UE5. Uplink data transmitted by UE 1-UE 5 may also be received jointly by two TRPs, e.g., UE3 and UE4 may communicate simultaneously with TRP1 and TRP2, uplink data transmitted by UE3 and UE4 may be received jointly by TRP1 and TRP2, and TRP1 and TRP2 may also transmit downlink data and/or information to UE3 and UE 4. In the embodiment of the present application, the number of streams and uplink precoding of uplink transmission of each UE are calculated by the TRP (i.e. network device) side, and indicated to each UE by downlink information.
It should be noted that the number and types of the respective devices in the communication system shown in fig. 1 are only illustrative, and the embodiments of the present application are not limited thereto, and more or fewer terminal devices, more or fewer network devices, other network elements, for example, core network elements, etc. may be further included in the communication system in practical application.
It should be noted that, the network device in fig. 1 is only illustrated with TRP as an example, and it should be understood that other types of network devices are also possible, which is not limited in this application.
Referring to fig. 2, the network device and the terminal device according to the embodiments of the present application may include the following modules:
radio resource control (radio resource control, RRC) signaling interaction module: and the network equipment and the terminal equipment are used for sending and receiving the RRC signaling, for example, the network equipment sends the RRC signaling to the terminal equipment, and the terminal equipment receives the RRC signaling from the network equipment.
Medium access control (media access control, MAC) signaling interworking module: the network device and the terminal device are modules for sending and receiving media access control (medium access control, MAC) -Control Element (CE) signaling, for example, the network device sends MAC-CE signaling to the terminal device, and the terminal device receives MAC-CE signaling from the network device.
Physical layer (PHY) signaling and data interaction module: and the network equipment and the terminal equipment are used for sending and receiving uplink/downlink control signaling and uplink/downlink data. For example, the network device transmits a physical downlink control channel (physical downlink control channel, PDCCH), such as downlink control information (downlink control information, DCI) in the PDCCH, to the terminal device, and the network device transmits a physical downlink shared channel (physical downlink shared channel, PDSCH), such as downlink data in the PDSCH, to the terminal device. The terminal device sends a physical uplink control channel (physical uplink control channel, PUCCH), such as uplink control information (uplink control information, UCI) in the PUCCH, to the network device, and the terminal device sends a physical uplink shared channel (physical uplink shared channel, PUSCH), such as uplink data in the PUSCH, to the network device.
It should be understood that the modules shown in fig. 2 are only exemplary, and the network device and the terminal device may further include other communication modules, such as a radio link control (radio link control, RLC) module, a packet data convergence layer protocol (packet data convergence protocol, PDCP) module, or a service data adaptation protocol (service data adaptation protocol, SDAP) module, which are not specifically limited in this embodiment of the present application.
In a 5G communication system, application of a massive-MIMO technology plays a crucial role in improving the spectral efficiency of the system. By using the massive-MIMO technology, the terminal equipment needs to pre-encode data when sending uplink data. The 3GPP NR protocol supports two types of transmission modes with respect to multi-antenna precoding for uplink transmission: codebook-based uplink transmission modes (codebook based UL transmission scheme, CB) and non-codebook-based uplink transmission modes (non-codebook based UL transmission scheme, NCB).
For the NCB uplink transmission mode, the terminal equipment acquires uplink channel information according to the CSI-RS and the channel reciprocity sent by the network equipment, so as to calculate a plurality of candidate precoding (precoders), load the plurality of candidate precoding on SRS resources and send the SRS resources to the network equipment, and finally the network equipment indicates the selected precoding to the terminal equipment through SRI.
For the NCB-based uplink transmission mode, the 3gpp NR r16 protocol supports SRI indication when the terminal device transmits an antenna number of 2 Transmitters (TX) and 4TX and when the maximum uplink transmission layer number of the terminal device is 4. The network device sends the CSI-RS to the terminal device, and the terminal device estimates the downlink channel information and acquires the uplink channel information based on the reciprocity of the uplink and downlink channels. The terminal equipment calculates 4 candidate pre-coders of 4*1 based on the estimated uplink channel information, and calculates the first N SRS The number of predecoders is loaded in N SRS And the SRS resources are sent to the network equipment. The existing protocol specifies that the maximum number of SRS resources allocated to NCB-based uplink transmission mode is 4, N SRS The value can be 2,3 and 4, and each SRS resource (resource) has 1 port. The network device receives the SRS transmitted by the terminal device and estimates the candidate predecoders, then determines which predecoders to use, and indicates the index of SRS resources corresponding to the selected predecoders to the terminal device through the SRI field in the downlink control information (downlink control information, DCI). After receiving DCI, the terminal equipment receives the high-level parameter N according to RRC indication SRS And L max To an SRI indicator table (table) and corresponding columns, such as table 1 below. Wherein N is SRS Is the SRS resource number, L, for uploading candidate predecoders in NCB transmission designated by network equipment max Is the maximum number of uplink transmission layers in the NCB transmission designated by the network device. For example, when L max ＝4，N SRS When=4, it can be located to column 6 in table 1 below. Finally, the terminal equipment determines the pair according to the bit value of the SRI domainAnd a corresponding row, and carrying out PUSCH transmission by using a precoder corresponding to the row.
TABLE 1
Index SRI(s)，N SRS ＝2 Index SRI(s)，N SRS ＝3 Index SRI(s)，N SRS ＝4
0 0 0 0 0 0
1 1 1 1 1 1
2 0,1 2 2 2 2
3 Reservation (reserved) 3 0,1 3 3
4 0,2 4 0,1
5 1,2 5 0,2
6 0,1,2 6 0,3
7 reserved 7 1,2
8 1,3
9 2,3
10 0,1,2
11 0,1,3
12 0,2,3
13 1,2,3
14 0,1,2,3
15 reserved
As described above, the current 3gpp NR 16 protocol defines an SRI indication rule when the number of transmit antennas of the terminal device is 2TX and 4TX, and the maximum uplink transmission layer number of the terminal device is 4. In order to further increase the uplink system capacity, the number of transmitting antennas of the terminal device is expected to be increased to 8TX and above, and the maximum uplink transmission layer number supported by each terminal device may exceed 4 layers. 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 uplink transmission layer number may also exceed the uplink transmission layer number of the terminal device supported by the indication method in the current protocol, however, the indication method cannot be supported, and uplink transmission failure may be caused.
Based on this, the embodiment of the application provides a communication method, which can be suitable for terminal equipment with more transmitting antennas and uplink transmission layers, and improves uplink transmission performance.
In the following embodiments, the communication method provided in the present application will be described in detail by taking a terminal device and a network device as examples, and it should be understood that the operations performed by the terminal device may also be implemented by a processor in the terminal device, or a chip system, or a functional module, etc., and the operations performed by the network device may also be implemented by a processor in the network device, or a chip system, or a functional module, etc., which is not limited to this application.
Based on the above description, a communication method provided in the embodiments of the present application may be shown in fig. 3. The flow of the method can comprise:
step 301: the network equipment determines first information, wherein the first information is used for indicating W precoding and indicating whether the uplink transmission layer number is larger than M, W is a positive integer, and M is a preset uplink transmission layer number threshold value.
Step 302: the network device sends the first information to the terminal device. Accordingly, the terminal device receives the first information from the network device.
Step 303: and the terminal equipment determines N precoding according to the W precoding and whether the uplink transmission layer number is larger than M, and sends uplink data based on the N precoding. Wherein, N may be an integer greater than or equal to W.
Alternatively, M may be 4, etc. It can also be understood that M is the maximum uplink transport layer number 4 supported by the terminal device described above. Of course, it should be understood that M may take other values, and this application is not limited thereto.
In an alternative embodiment, before the network device determines the first information, the terminal device may determine a candidate precoding, where the number of candidate precodes may be related to the number of resources for uplink transmission and the number of ports corresponding to the resources for uplink transmission. And then, the terminal equipment can send the candidate precoding to the network equipment through the resource for uplink transmission, and correspondingly, the network equipment can receive the candidate precoding from the terminal equipment through the resource for uplink transmission. Further, the network device may determine the W precodes among the candidate precodes.
Illustratively, the network device sends a downlink reference signal for channel measurement to the terminal device, and the terminal device may determine the candidate precoding according to the downlink reference signal and channel reciprocity. Wherein 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.
When the number of the resources for uplink transmission is a and the number of ports corresponding to the resources for uplink transmission is B, the number of the candidate precodes may be a×b, where 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, for example, may be, but are not limited to, SRS resources.
In an example a1, when the number of SRS resources is 4 and the number of ports corresponding to the SRS resources is 2, the number of candidate precodes may be 8.
In still another example a2, when the number of SRS resources is 8 and the number of ports corresponding to the SRS resources is 1, the number of candidate precodes may be 8.
In an optional implementation manner, the terminal device sends the candidate precoding to the network device through the resource for uplink transmission, and the method may be as follows: the terminal equipment can sort the A.B candidate precoders according to the first performance from high to low, and then divide the sorted A.B candidate precoders into A group candidate precoders according to the sorting order, wherein each group of candidate precoders comprises B candidate precoders; finally, the terminal device may send the a-group candidate precoding to the network device through a resources for uplink transmission, where the a-group candidate precoding corresponds to the a resources for uplink transmission one by one.
Alternatively, two candidate precoders that are sequentially adjacent may not be located in the same group, and are located in adjacent groups.
Illustratively, the first performance may be, but is not limited to being, a signal-to-noise ratio (signal to noise ratio, SNR), or the like.
For example, in the above example a1, after the 8 candidate precodes are ordered in descending order of SNR, the index of the candidate precodes may be 0,1,2,3,4,5,6,7. Further, the 8 candidate precoders may be divided into four groups {0,4}, {1,5}, {2,6} and {3,7}, respectively, and then the terminal device may load the four groups of candidate precoders onto SRS resource 0, SRS resource 1, SRS resource 2 and SRS resource 3, respectively, and send the four groups of candidate precoders to the network device. For example, the terminal device may transmit the candidate precoding {0,4} to the network device via SRS resource 0.
For another example, in the above example a2, after the 8 candidate precodes are ordered in descending order of SNR, the index of the candidate precodes may be 0,1,2,3,4,5,6,7. Further, the 8 candidate precoders may be divided into eight groups {0}, {1}, {2}, {3}, {4}, {5}, {6}, and {7}, respectively, and then the terminal device may load the eight groups of candidate precoders onto SRS resources 0 to 7, respectively, and send the eight groups of candidate precoders to the network device. For example, the terminal device may transmit the candidate precoding {0} to the network device via SRS resource 0.
Alternatively, in the above example a2, since the number of ports corresponding to the SRS resource is 1, each set of candidate precodes includes 1 candidate precoder, in this case, the terminal device may not perform the grouping operation of the candidate precodes, and may directly load the 8 candidate precodes after the sorting of the 8 candidate precodes onto the SRS resources 0 to 7, respectively, to send to the network device.
In the above examples, the index of the candidate precoding or the index number of the SRS resource starts with 0, alternatively may start with 1, which is not limited in this application.
In an optional embodiment, the first information may indicate whether the uplink transmission layer number is greater than M by:
the mode b1, the first information may include a first bit, where the first bit indicates whether the uplink transmission layer number is greater than M.
Illustratively, the first bit may include 1 bit (bit) by which whether the uplink transmission layer number is greater than M is directly indicated. For example, the first information may indicate that the uplink transmission layer number is less than or equal to M when the 1-bit value is a first value, and the first information may indicate that the uplink transmission layer number is greater than M when the 1-bit value is a second value. Wherein 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, and the application is not limited to the first value and the second value.
Mode b2, the first information may include a first field, where the first field may be used to indicate the number of activated codewords; when the first field indicates that the number of activated codewords (codewords) is 1, the first information may indicate that the uplink transmission layer number 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 transmission layer number is greater than M.
Illustratively, the first field may be, but is not limited to, a field such as a modulation and coding scheme (modulation and coding scheme, MCS), redundancy version (redundancy version, RV), or NDI.
Alternatively, in the present application, the first information may be downlink control information (downlink control information, DCI), or the first information may also be carried in the DCI, which is not limited in the present application.
Further, in a possible implementation c1, when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precodes indicated by the first information may be W candidate precodes in M candidate precodes among the candidate precodes, where the M candidate precodes may be first M candidate precodes with a first performance from high to low among the candidate precodes, where W is less than or equal to M, and where W is equal to N. That is, when the uplink transmission layer number is less than or equal to M, the N precodes determined by the terminal device are the W precodes indicated by the first information.
For example, as in the foregoing example a1 or a2, assuming that M is 4, when the uplink transmission layer number is less than or equal to 4, N precodes (i.e., the W precodes) may be N out of the first 4 candidate precodes of candidate precodes after SNR descending order, that is, N precodes may be N out of candidate precodes with indexes 0,1,2,3, where N is less than or equal to 4.
For example, the first information may include first indication information, which may be used to indicate indexes of the W candidate precodes.
Alternatively, the method of indicating the index of the W candidate precodes by the first indication information may multiplex the foregoing indication method in combination with table 1.
In a possible implementation c2, when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information may be N-M candidate precoders among candidate precoders other than M candidate precoders among the candidate precoders, and the N precoders may be the M candidate precoders and the N-M candidate precoders; the M candidate precodes may still be the first M candidate precodes of the candidate precodes with the first performance from high to low, where N is greater than M and W is equal to N-M.
For example, as in the foregoing example a1 or a2, assuming that M is 4, when the uplink transmission layer number is greater than 4, the N precodes may include the first 4 candidate precodes of candidate precodes that are subjected to SNR descending order, e.g., the N precodes may include candidate precodes with indexes of 0,1,2, and 3. And the remaining N-4 candidate precodes are N-4 out of the candidate precodes other than the 4 candidate precodes described above, e.g., N-4 out of candidate precodes with indexes 4,5,6,7, where N is greater than 4.
For example, the first information may include second indicating information for indicating indexes of the N-M candidate precodes.
For example, when the second indication information indicates the N-M candidate precodes, the candidate precoding 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 an index of the candidate precoding indicated by the foregoing indication method in combination with table 1. For example, in the case of positioning as the sixth column in table 1, assuming that the value of the second indication information is 0111, the second indication information indicates a row with index (index) of 7 in table 1, that is, the second indication information indicates candidate precoding with indexes of 1 and 2, and based on the above rule, candidate precoding with indexes of 1+m and 2+M is N-M candidate precoding implicitly indicated by the second indication information. Assuming that M is 4, N precodes are candidate precodes with an index of 0,1,2,3,5,6.
In an alternative embodiment, in the case that the number of resources used for uplink transmission is less than or equal to 4 and the number of uplink transmission layers is less than or equal to 4, the network device may directly indicate N precodes according to the existing method, that is, directly indicate the selected precoding in combination with table 1.
The method can be flexibly adapted to the precoding indication of the actual uplink transmission layer number, so that the number of the transmitting antennas supported by the terminal equipment can be flexibly adapted, and the uplink transmission performance is improved. While the indication overhead is relatively small.
Based on the above embodiments, the embodiments of the present application further provide a communication device, and referring to fig. 4, a communication device 400 may include a transceiver unit 401 and a processing unit 402. The transceiver 401 is configured to communicate with the communication device 400, for example, to receive information, messages, data, or the like, or to transmit information, messages, data, or the like, and the processor 402 is configured to control and manage the operation of the communication device 400. The processing unit 402 may also control the steps performed by the transceiver unit 401.
The communication apparatus 400 may be specifically a terminal device, a processor of the terminal device, a chip system, a functional module, or the like in the above embodiments. Alternatively, the communication apparatus 400 may be specifically a network device, a processor of the network device, a chip system, or a functional module in the foregoing embodiment.
In an embodiment, when the communication apparatus 400 is configured to implement the function of the terminal device in the foregoing embodiment, the transceiver unit 401 may be configured to receive first information from a network device, where the first information is used to indicate W precodes, and is used to indicate whether the uplink transmission layer number is greater than M, where W is a positive integer, and M is a preset uplink transmission layer number threshold; the processing unit 402 may be configured to determine N precodes according to whether the W precodes and the uplink transmission layer number are greater than M; the transceiver unit 401 may be further configured to transmit uplink data based on the N precodes. The N may be an integer greater than or equal to the W.
In an alternative embodiment, the processing unit 402 may be further configured to: before the transceiver 401 receives the first information from the network device, determining a candidate precoding, where the number of candidate precodes is related to the number of resources for uplink transmission and the number of ports corresponding to the resources for uplink transmission;
the transceiver unit 401 may be further configured to send the candidate precoding to the network equipment through the resource for uplink transmission. Wherein the W candidate precodes and the N precodes are both included in the candidate precodes.
For example, when the number of resources for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b, a is a positive integer, and B is a positive integer;
furthermore, the processing unit 402 may be further configured to rank the a×b candidate precodes according to a first performance from high to low; dividing the ordered A.times.B candidate precoding into A group of candidate precoding according to the ordering sequence, wherein each group of candidate precoding comprises B candidate precoding;
the transceiver unit 401 may be specifically configured to: and sending the A group candidate precoding to the network equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one.
Optionally, the first information is used to indicate whether the uplink transmission layer number is greater than M, and may include: the first information includes a first bit indicating whether the uplink transmission layer number is greater than M; or, the first information includes a first field, where 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 uplink transmission layer number 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 number is greater than M.
In an example, when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precodes indicated by the first information may be W candidate precodes among M candidate precodes among the candidate precodes, the M candidate precodes may be first M candidate precodes from high to low in first performance among the candidate precodes, the W is less than or equal to the M, and the N is equal to the W.
Optionally, the first information may include first indication information, where the first indication information is used to indicate indexes of the W candidate precodes.
In another example, when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information may be N-M candidate precoders among candidate precoders other than the M candidate precoders, and the N precoders may be the M candidate precoders and the N-M candidate precoders; the M candidate precodes may be first M candidate precodes of the candidate precodes with a first performance from high to low, where N is greater than M.
Alternatively, the first information may include second indicating information for indicating indexes of the N-M candidate precodes.
In another embodiment, when the communication apparatus 400 is configured to implement the function of the network device in the foregoing embodiment, the processing unit 402 may be configured to determine first information, where the first information is used to indicate W precodes and is used to indicate whether the uplink transmission layer number is greater than M, where W is a positive integer, and M is a preset uplink transmission layer number threshold; whether the W precoding layers and the uplink transmission layer number are larger than M is used for determining N precoding layers, and the N precoding layers are used for transmitting uplink data by the terminal equipment; the N is an integer greater than or equal to the W; the transceiver 401 may be configured to send the first information to the terminal device, so that the terminal device determines N precodes according to whether the W precodes and the uplink transmission layer number are greater than M.
Optionally, the transceiver unit 401 may be further configured to: before the processing unit 402 determines the first information, receiving candidate precoding from the terminal equipment through a resource for uplink transmission; the number of the candidate precoded codes is related to the number of the resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission; the processing unit 402 may be further configured to determine the W precodes among the candidate precodes.
For example, when the number of resources for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b, a is a positive integer, and B is a positive integer; furthermore, when receiving the candidate precoding from the terminal equipment through the resource for uplink transmission, the transceiver unit 401 may be configured to: receiving A group candidate precoding from the terminal equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one; the A group of candidate precoding is divided into A, B and B candidate precoding after being ranked from high to low according to the first performance according to the ranking order, and each group of candidate precoding comprises B candidate precoding.
In a possible implementation manner, the first information is used to indicate whether the uplink transmission layer number is greater than M, and may include: the first information includes a first bit indicating whether the uplink transmission layer number is greater than M; or, the first information includes a first field, where 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 uplink transmission layer number 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 number is greater than M.
In one example, when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precoders indicated by the first information may be W candidate precoders out of M candidate precoders, where the M candidate precoders may be first M candidate precoders with a first performance from high to low, the W is less than or equal to the M, and the N is equal to the W.
Optionally, the first information may include first indication information, where the first indication information is used to indicate indexes of the W candidate precodes.
In another example, when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information may be N-M candidate precoders among candidate precoders other than the M candidate precoders, and the N precoders may be the M candidate precoders and the N-M candidate precoders; the M candidate precodes may be first M candidate precodes of the candidate precodes with a first performance from high to low, where N is greater than M.
Alternatively, the first information may include second indicating information for indicating indexes of the N-M candidate precodes.
It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. The functional units in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product 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 (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Based on the above embodiments, the present application further provides a communication device, and referring to fig. 5, a communication device 500 may include a transceiver 501 and a processor 502. Optionally, the communication device 500 may further include a memory 503. The memory 503 may be disposed inside the communication device 500, or may be disposed outside the communication device 500. Wherein the processor 502 may control the transceiver 501 to receive and transmit messages, information, messages or data, etc.
In particular, the processor 502 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor 502 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof.
Wherein the transceiver 501, the processor 502 and the memory 503 are interconnected. Optionally, the transceiver 501, the processor 502 and the memory 503 are connected to each other by a bus 504; the bus 504 may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, or the like. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 5, but not only one bus or one type of bus.
In an alternative embodiment, the memory 503 is used to store programs and the like. In particular, 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 magnetic disk memories. The processor 502 executes the application program stored in the memory 503 to realize the functions described above, thereby realizing the functions of the communication device 500.
The communication apparatus 500 may be, for example, a terminal device in the above-described embodiment; but also the network device in the above embodiment.
In one embodiment, the transceiver 501 may implement the transceiving operation performed by the terminal device in the above embodiment when the communication apparatus 500 implements the function of the terminal device in the above embodiment; the processor 502 may implement operations other than the transceiving operations performed by the terminal device in the above-described embodiments. Specific details of the foregoing are set forth in the embodiment of fig. 3 and are not described in detail herein.
In another embodiment, the transceiver 501 may implement the transceiving operation performed by the network device in the above embodiment when the communication apparatus 500 implements the function of the network device in the above embodiment; the processor 502 may implement operations other than the transceiving operations performed by the network device in the above-described embodiments. Specific details of the foregoing are set forth in the embodiment of fig. 3 and are not described in detail herein.
Based on the above embodiments, the embodiments of the present application provide a communication system, which may include the terminal device and the network device and the like related to the above embodiments.
The embodiment of the present application further provides a computer readable storage medium, where the computer readable storage medium is used to store a computer program, where the computer may implement the method provided by the embodiment shown in fig. 3.
Embodiments of the present application also provide a computer program product for storing a computer program, which when executed by a computer can implement the method provided by the embodiment shown in fig. 3.
The embodiment of the application further provides a chip, which comprises a processor, wherein the processor is coupled with the memory, and is used for calling the program in the memory to enable the chip to realize the method provided by the embodiment shown in the above-mentioned fig. 3.
The embodiment of the application also provides a chip, which is coupled with the memory, and is used for realizing the method provided by the embodiment shown in fig. 3.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining 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, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (21)

1. A method of communication, comprising:
the method comprises the steps that a terminal device receives first information from network devices, wherein the first information is used for indicating W precoding and indicating whether the uplink transmission layer number is larger than M, W is a positive integer, and M is a preset uplink transmission layer number threshold;
and the terminal equipment determines N precoding according to the W precoding and whether the uplink transmission layer number is larger than M, and transmits uplink data based on the N precoding, wherein N is an integer larger than or equal to W.
2. The method of claim 1, wherein prior to the terminal device receiving the first information from the network device, the method further comprises:
the terminal equipment determines 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;
and the terminal equipment sends the candidate precoding to the network equipment through the resource for uplink transmission, wherein the W precodes and the N precodes are contained in the candidate precoding.
3. The method of claim 2, wherein when the number of resources for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b, a is a positive integer, and B is a positive integer;
the terminal device sends the candidate precoding to the network device through the resource for uplink transmission, including:
the terminal equipment sorts the A.B candidate precoding according to the first performance from high to low;
the terminal equipment divides the sequenced A.times.B candidate precoders into A groups of candidate precoders according to the sequencing order, wherein each group of candidate precoders comprises B candidate precoders;
And the terminal equipment sends the A group candidate precoding to the network equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one.
4. The method of any one of claims 1-3, wherein the first information for indicating whether the uplink transmission layer number is greater than M comprises:
the first information includes a first bit indicating whether the uplink transmission layer number is greater than M; or alternatively
The first information comprises a first field, wherein the first field is used for indicating the number of activated codewords; when the first field indicates that the number of activated codewords is 1, the first information indicates that the uplink transmission layer number 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 number is greater than M.
5. The method of claim 2 or 3, wherein when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precodes indicated by the first information are W candidate precodes among M candidate precodes among the candidate precodes, the M candidate precodes being first M candidate precodes of the candidate precodes with first performance from high to low, the W being less than or equal to the M, and the N being equal to the W.
6. The method of claim 5, wherein the first information comprises first indication information indicating indexes of the W candidate precodes.
7. The method of claim 2 or 3, wherein when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information are N-M candidate precoders out of candidate precoders other than M candidate precoders; the N precodes are the M candidate precodes and the N-M candidate precodes; the M candidate precodes are the first M candidate precodes with the first performance from high to low in the candidate precodes, and the N is larger than the M.
8. The method of claim 7, wherein the first information comprises second indication information indicating indexes of the N-M candidate precodes.
9. A method of communication, comprising:
the network equipment determines first information, wherein the first information is used for indicating W precoding and indicating whether the uplink transmission layer number is larger than M, W is a positive integer, and M is a preset uplink transmission layer number threshold;
The network device sends the first information to a terminal device, so that the terminal device determines N precoding according to the W precoding and whether the uplink transmission layer number is larger than M, wherein the N precoding is used for sending uplink data by the terminal device; and N is an integer greater than or equal to W.
10. The method of claim 9, wherein prior to the network device determining the first information, the method further comprises:
the network equipment receives candidate precoding from the terminal equipment through resources for uplink transmission; the number of the candidate precoded codes is related to the number of the resources used for uplink transmission and the number of ports corresponding to the resources used for uplink transmission;
the network device determines the W precodes among the candidate precodes.
11. The method of claim 10, wherein when the number of resources for uplink transmission is a and the number of ports is B, the number of candidate precodes is a×b, a is a positive integer, and B is a positive integer;
the network device receiving the candidate precoding from the terminal device through the resource for uplink transmission, including:
The network equipment receives A group candidate precoding from the terminal equipment through A resources for uplink transmission, wherein the A group candidate precoding corresponds to the A resources for uplink transmission one by one;
the A group of candidate precoding is divided into A, B and B candidate precoding after being ranked from high to low according to the first performance according to the ranking order, and each group of candidate precoding comprises B candidate precoding.
12. The method of any one of claims 9-11, wherein the first information for indicating whether the uplink transmission layer number is greater than M includes:
the first information includes a first bit indicating whether the uplink transmission layer number is greater than M; or alternatively
The first information comprises a first field, wherein the first field is used for indicating the number of activated codewords; when the first field indicates that the number of activated codewords is 1, the first information indicates that the uplink transmission layer number 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 number is greater than M.
13. The method of claim 10 or 11, wherein when the first information indicates that the uplink transmission layer number is less than or equal to M, the W precodes indicated by the first information are W candidate precodes among M candidate precodes among the candidate precodes, the M candidate precodes being first M candidate precodes of the candidate precodes with first performance from high to low, the W being less than or equal to the M, and the N being equal to the W.
14. The method of claim 13, wherein the first information comprises first indication information indicating indexes of the W candidate precodes.
15. The method of claim 10 or 11, wherein when the first information indicates that the uplink transmission layer number is greater than M, the W precoders indicated by the first information are N-M candidate precoders out of candidate precoders other than M candidate precoders; the N precodes are the M candidate precodes and the N-M candidate precodes; the M candidate precodes are the first M candidate precodes with the first performance from high to low in the candidate precodes, and the N is larger than the M.
16. The method of claim 15, wherein the first information comprises second indication information indicating indexes of the N-M candidate precodes.
17. A communication device comprising a processor and a transceiver, wherein:
the transceiver is used for communicating by the communication device;
the processor for invoking computer instructions stored in memory to perform the method of any of claims 1-8 by the transceiver.
18. A communication device comprising a processor and a transceiver, wherein:
the transceiver is used for communicating by the communication device;
the processor for invoking computer instructions stored in memory to perform the method of any of claims 9-16 by the transceiver.
19. A computer readable storage medium having stored therein computer executable instructions which when invoked by the computer to perform the method of any one of claims 1-8 or to perform the method of any one of claims 9-16.
20. A computer program product comprising instructions which, when run on a computer, cause the method of any one of claims 1 to 8 to be performed or cause the method of any one of claims 9 to 16 to be performed.
21. A chip, characterized in that the chip is coupled to a memory for reading and executing program instructions stored in the memory for implementing the method according to any of claims 1-8 or for implementing the method according to any of claims 9-16.
CN202210867372.9A 2022-07-22 2022-07-22 Communication method and device Pending CN117498901A (en)

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