WO2026026366A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置

Info

Publication number
WO2026026366A1
WO2026026366A1 PCT/CN2025/104404 CN2025104404W WO2026026366A1 WO 2026026366 A1 WO2026026366 A1 WO 2026026366A1 CN 2025104404 W CN2025104404 W CN 2025104404W WO 2026026366 A1 WO2026026366 A1 WO 2026026366A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication device
memory
indication information
communication
indication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/104404
Other languages
English (en)
French (fr)
Inventor
姜伊昇
毕晓艳
王磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2026026366A1 publication Critical patent/WO2026026366A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage

Definitions

  • This application relates to the field of communication technology, and more specifically, to a communication method and a communication device.
  • massive multi-input multi-output (MIMO) technology which can significantly improve system capacity, will continue to be a key technology to meet the demands of high-speed transmission.
  • the limited buffer rate matching (LBRM) parameter ILBRM can be configured in the radio resource control (RRC) message to indicate the size limit of the circular buffer.
  • RRC radio resource control
  • This application provides a communication method aimed at improving the flexibility of buffer size limit indication.
  • a communication method is provided. This method can be executed by a first communication device.
  • the "first communication device” in this application can refer to the first communication device itself (e.g., a network device), or a component within the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in a network device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)).
  • a modem chip also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip
  • SoC system-on-chip
  • SIP system-in-package
  • the communication method includes: receiving first indication information from a second communication device, the first indication being used to indicate the remaining memory of the second communication device; and sending second indication information to the second communication device according to the remaining memory, the second indication information being used to indicate the size limit of the circular buffer of the second communication device.
  • the first communication device can indicate the size limit of the circular buffer according to the memory balance reported by the second communication device. That is, when the first communication device indicates the size limit of the circular buffer of the second communication device, it takes into account the memory balance of the second communication device. This can quickly respond to the problem of insufficient memory of the second communication device, reduce the risk that the second communication device cannot decode correctly due to insufficient memory, and improve transmission performance.
  • the method before receiving the first indication information from the second communication device, the method further includes: sending a third indication information to the second communication device, the third indication information being used to indicate reporting the remaining memory; or, sending a fourth indication information to the second communication device, the fourth indication information being used to indicate reporting the remaining memory if a first condition is met, wherein the first condition is used to determine whether to report the remaining memory.
  • the first communication device can instruct the second communication device to report memory balance, or it can instruct the second communication device to report memory balance under certain conditions, providing different ways to trigger the second communication device to report memory balance, thereby improving the flexibility of the solution.
  • the first condition includes at least one of the following: the number of transmit and receive antennas of the second communication device is greater than a first threshold; the maximum rank of the channel of the second communication device is greater than a second threshold; the number of streams scheduled by the second communication device is greater than a third threshold; the number of circular buffer codewords of the second communication device is greater than a fourth threshold; the communication bandwidth of the second communication device is greater than a fifth threshold; the modulation order of the data transmitted by the second communication device is greater than a sixth threshold; the retransmission feedback delay of the data transmitted by the second communication device is greater than a seventh threshold; the total memory of the second communication device is less than an eighth threshold; or the memory size occupied by other functions of the second communication device is greater than a ninth threshold, wherein the other functions of the second communication device are functions other than supporting the storage of circular buffer codewords of the second communication device.
  • the second communication device when it decides whether to report the remaining memory, it can make the decision based on different conditions, such as the number of its own transceiver antennas, the number of data streams, or the number of codewords in its own circular buffer, thus providing different conditions for the second communication device to make its own decision.
  • the first indication information is used to indicate the memory balance, including at least one of the following: the first indication information indicates whether the memory balance is sufficient; or, the first indication information indicates the size of the memory balance; or, the first indication information indicates the ratio of the memory balance to the memory size required for data transmission.
  • the first indication information can indicate the memory balance in a rough manner, or it can indicate the size of the memory balance accurately, or it can indicate the ratio of the memory balance to the memory size required for the current data transmission. It can be understood that there are multiple ways for the first indication information to indicate the memory balance, as long as it enables the second communication device to know the memory balance of the first communication device.
  • receiving the first indication information from the second communication device includes: receiving uplink control information (UCI) from the second communication device, wherein the uplink control information includes the first indication information.
  • UCI uplink control information
  • sending the second indication information to the second communication device includes: sending downlink control information (DCI) to the second communication device, wherein the downlink control information includes the second indication information.
  • DCI downlink control information
  • the configuration of static LBRM parameters in RRC in the current NR communication protocol is more flexible than the dynamic LBRM indication in DCI.
  • the second indication information indicates at least one of the following: the modulation order of the transmitted data, the code rate of the codeword, the number of streams of the transmitted data, the transmission bandwidth of the transmitted data, or the number of Hybrid Automatic Repeat Request (HARQ) processes for the transmitted data.
  • HARQ Hybrid Automatic Repeat Request
  • the first communication device can indicate at least one of the following parameters through the second indication information: modulation order of the transmitted data, number of transmitted data streams, transmission bandwidth of the transmitted data, codeword rate, or number of HARQ processes for the transmitted data.
  • This allows the second communication device to perform memory operations according to the indication of the second indication information, thereby limiting the buffer size.
  • the second indication information can indicate different parameters to assist the second communication device in performing memory operations, improving the flexibility of the solution.
  • the second indication information indicates at least one of limiting the maximum number of HARQ processes, increasing the code rate of the codeword, reducing the modulation order of the transmitted data, reducing the number of streams of the transmitted data, or reducing the transmission bandwidth of the transmitted data.
  • the first communication device can use the second indication information to indicate at least one of the following: limiting the maximum number of HARQ processes for transmitted data, increasing the code rate of the codewords, reducing the modulation order of the transmitted data, reducing the number of data streams, or reducing the transmission bandwidth of the transmitted data.
  • This allows the second communication device to perform memory operations according to the second indication information, such as merging received codewords to reduce memory usage; adjusting the maximum number of HARQ processes; or clearing unused HARQ processes. This reduces the risk of the second communication device being unable to decode correctly due to insufficient memory and improves transmission performance.
  • the second indication information occupies one bit, the bit value being used to indicate whether the use of the circular buffer is restricted or not; or, the second indication information occupies multiple bits, the different values of the bits being used to indicate at least one of the following: modulation order of different transmitted data, codeword rate, number of transmitted data streams, transmission bandwidth of transmitted data, or number of Hybrid Automatic Repeat Request (HARQ) processes for transmitted data.
  • HARQ Hybrid Automatic Repeat Request
  • the content of the LBRM indication sent by the first communication device can be based on the current 1-bit design of the LBRM indication, indicating whether or not a limited buffer is used through the bit value.
  • the content of the LBRM indication sent by the first communication device can also be a multi-bit indication, representing the code rate, modulation order, number of streams, transmission bandwidth, or maximum HARQ process limit of different levels of codewords.
  • a communication method is provided. This method can be executed by a second communication device.
  • the "second communication device" in this application can refer to the second communication device itself (e.g., a terminal device), or a component within the second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in a terminal device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core)), or it can be a logic module or software capable of implementing all or part of the functions of the second communication device.
  • a second communication device for ease of description, the following explanation uses execution by a second communication device as an example.
  • the communication method includes: sending a first indication message to a first communication device, the first indication message indicating the remaining memory; and receiving a second indication message from the first communication device, the second indication message indicating the size limit of the circular buffer of the first communication device, the second indication message being determined based on the remaining memory.
  • the method before the second communication device determines the remaining memory, the method further includes: receiving third indication information from the first communication device, the third indication information being used to indicate reporting the remaining memory; or, determining that a first condition is met, the first condition being used to determine whether to report the remaining memory.
  • the first condition includes at least one of the following: the number of transmit and receive antennas of the second communication device is greater than a first threshold; the maximum rank of the channel of the second communication device is greater than a second threshold; the number of streams scheduled by the second communication device is greater than a third threshold; the number of circular buffer codewords of the second communication device is greater than a fourth threshold; or the communication bandwidth of the second communication device is greater than a fifth threshold; the modulation order of the data transmitted by the second communication device is greater than a sixth threshold; the retransmission feedback delay of the data transmitted by the second communication device is greater than a seventh threshold; the total memory of the second communication device is less than an eighth threshold; or the memory occupied by other functions of the second communication device is greater than a ninth threshold, wherein the other functions of the second communication device are functions other than supporting the storage of circular buffer codewords of the second communication device.
  • the first indication information is used to indicate the memory balance, including at least one of the following: the first indication information indicates whether the memory balance is sufficient; or, the first indication information indicates the size of the memory balance; or, the first indication information indicates the ratio of the memory balance to the memory size required for data transmission.
  • determining the memory reserve of the first communication device includes: determining the memory reserve based on at least one of the following parameters corresponding to the uplink data: bandwidth, number of codewords, number of streams, modulation order, retransmission feedback interval, subcarrier spacing, codeword size, total memory of the second communication device, and memory size occupied by other functions of the second communication device; or, determining the memory reserve based on at least one of the following parameters corresponding to the downlink data: bandwidth, number of codewords, decoding result, number of streams, modulation order, retransmission feedback interval, subcarrier spacing, codeword size, total memory of the second communication device, and memory size occupied by other functions of the second communication device, wherein the other functions of the second communication device are functions other than supporting the storage of codewords in the circular buffer of the second communication device.
  • sending the first indication information to the first communication device includes: sending uplink control information (UCI) to the first communication device, wherein the uplink control information includes the first indication information.
  • UCI uplink control information
  • receiving the second indication information from the first communication device includes: receiving downlink control information (DCI) from the first communication device, wherein the downlink control information includes the second indication information.
  • DCI downlink control information
  • the second indication information indicates at least one of the following: the code rate of the codeword, the modulation order of the transmitted data, the number of streams of the transmitted data, the transmission bandwidth of the transmitted data, or the number of Hybrid Automatic Repeat Request (HARQ) processes for the transmitted data.
  • HARQ Hybrid Automatic Repeat Request
  • the second indication information when the first indication information indicates that the memory margin is insufficient to support the number of HARQ processes in the circular buffer of the first communication device, the second indication information indicates at least one of limiting the maximum number of HARQ processes for transmitted data, increasing the code rate of the codeword, reducing the modulation order of the transmitted data, reducing the number of streams of the transmitted data, or reducing the transmission bandwidth of the transmitted data.
  • the method further includes: the second communication device processing the received codewords, processing the encoded codewords, or adjusting the maximum number of Hybrid Automatic Repeat Request (HARQ) processes according to the second indication information, wherein processing the received codewords includes merging the received codewords based on the codeword rate, and processing the encoded codewords includes truncating the encoded codewords based on the codeword rate.
  • HARQ Hybrid Automatic Repeat Request
  • a communication device is provided.
  • the communication device is used to execute the first aspect described above and any of its embodiments.
  • the communication device includes a processor and a memory for storing a computer program; the processor is used to retrieve and run the computer program from the memory, causing the communication device to execute the first aspect described above and any of its embodiments.
  • the communication device is a network device.
  • the transceiver unit can be a transceiver or an input/output interface.
  • the processing unit can be at least one processor.
  • the transceiver can be a transceiver circuit.
  • the input/output interface can be an input/output circuit.
  • the communication device can be a chip, chip system, or circuit in a network device.
  • the transceiver unit can be an input/output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit;
  • the processing unit can be at least one processor, processing circuit, or logic circuit.
  • a communication device is provided.
  • the communication device is used to execute the second aspect described above and any of its embodiments.
  • the communication device includes a processor and a memory for storing a computer program; the processor is used to retrieve and run the computer program from the memory, causing the communication device to execute the second aspect described above and any of its embodiments.
  • the communication device can be a chip, chip system, or circuit in a terminal device.
  • the transceiver unit can be an input/output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit;
  • the processing unit can be at least one processor, processing circuit, or logic circuit.
  • This computer-readable storage medium stores a computer program that, when executed, causes the method of any implementation of the first and second aspects described above to be performed.
  • a computer program product containing instructions is provided.
  • the computer program product When the computer program product is run, it causes the method provided by any implementation of the first and second aspects above to be executed.
  • a chip including a processor and a communication interface, the processor reading instructions through the communication interface and executing the method provided by any of the implementations of the first and second aspects described above.
  • the chip also includes a memory that stores computer programs or instructions, and a processor that executes the computer programs or instructions stored in the memory.
  • the processor executes the method provided by any of the implementations of the first and second aspects described above.
  • a communication system including a communication device of the third aspect and a communication device of the fourth aspect.
  • a computer program When the computer program is run, it causes the method provided by any implementation of the first and second aspects above to be executed.
  • Figure 1 is a schematic diagram of a wireless communication system applicable to an embodiment of this application.
  • Figure 2 is another schematic diagram of a wireless communication system applicable to an embodiment of this application.
  • Figure 3 is a schematic flowchart of a communication method provided in an embodiment of this application.
  • Figure 4 is a schematic block diagram of a communication device provided in an embodiment of this application.
  • FIG. 5 is a schematic diagram of another communication device provided in an embodiment of this application.
  • Figure 6 is a schematic diagram of a chip system provided in an embodiment of this application.
  • At least one of a, b, and c can mean: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b, and c.
  • a, b, and c can be single or multiple.
  • instruction or “for instruction” can include both direct instruction and indirect instruction.
  • instruction can include whether the instruction directly instructs A or indirectly instructs A, but does not necessarily mean that the instruction carries A.
  • the indication methods involved in the embodiments of this application should be understood to cover various methods that enable the party to be indicated to obtain the information to be indicated.
  • the information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately.
  • the sending period and/or sending time of these sub-information can be the same or different. This application does not limit the sending method, for example.
  • the "instruction information" in the embodiments of this application can be an explicit instruction, that is, a direct instruction through signaling, or an instruction obtained by combining other rules or parameters with the parameters indicated by the signaling, or by deduction. It can also be an implicit instruction, that is, an instruction obtained based on rules or relationships, or based on other parameters, or by deduction. This application does not specifically limit it in this regard.
  • protocol can refer to a standard protocol in the field of communications, such as the 5th generation (5G) protocol, the new radio (NR) protocol, and related protocols applied to future communication systems. This application does not limit the term “protocol”.
  • Predefined can include predefined terms, such as protocol definitions.
  • Preconfiguration can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device. This application does not limit the implementation method of this feature.
  • “communication” can also be described as “communication”, “information transmission”, “data processing”, etc.
  • “Transmission” includes “sending” and “receiving”. “Transmission” can be described as “output”.
  • Sending information to XX (device) can be understood as the destination of the information being that device. This can include sending information directly or indirectly to that device.
  • "Receiving information from XX (device), or receiving information from XX (device)” can be understood as the source of the information being that device. This can include receiving information directly or indirectly from that device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood in a similar way, and will not be repeated here.
  • sending can also be understood as the "output” of the chip interface
  • “receiving” can also be understood as the "input” of the chip interface.
  • sending can occur between devices, for example, between network devices and terminal devices via an air interface.
  • sending or “receiving” can also occur within a device, for example, between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.
  • the configuration can be signaling configuration, such as radio resource control (RRC) messages, downlink control information (DCI) messages, or system information blocks (SIBs).
  • RRC radio resource control
  • DCI downlink control information
  • SIBs system information blocks
  • the signaling configuration can be provided to the terminal device by pre-configured signaling configuration, or configured to the terminal device through pre-configuration.
  • pre-configuration means defining or configuring the values of corresponding parameters in advance in the form of a protocol, and storing them in the terminal device when communicating with the terminal device.
  • the pre-configured messages can be modified or updated when the terminal device is connected to the network.
  • the technical solutions in this application can be applied to various communication systems, such as 5th generation (5G) or new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, and LTE time division duplex (TDD) systems.
  • the technical solutions provided in this application can also be applied to future communication systems.
  • the technical solutions provided in this application can be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • M2M machine-to-machine
  • MTC machine-type communication
  • IoT Internet of Things
  • the technical solutions provided in this application can also be applied to low-frequency scenarios, high-frequency scenarios, and terahertz frequencies.
  • a satellite communication system includes a satellite base station and terminal equipment.
  • the satellite base station provides communication services to the terminal equipment.
  • the satellite base station can also communicate with other base stations.
  • a satellite can act as a base station or as a terminal device.
  • “satellite” can refer to unmanned aerial vehicles (UAVs), hot air balloons, low-Earth orbit (LEO) satellites, medium-Earth orbit (MEO) satellites, high-Earth orbit (HEO) satellites, etc.
  • UAVs unmanned aerial vehicles
  • LEO low-Earth orbit
  • MEO medium-Earth orbit
  • HEO high-Earth orbit
  • Satellite can also refer to non-terrestrial base stations or non-terrestrial equipment, etc.
  • a device can send signals to or receive signals from another device. These signals can include information, signaling, or data.
  • the term “device” can also be replaced by an entity, network entity, network element, communication equipment, communication module, node, communication node, etc. This application uses "device” as an example for description.
  • a communication system can include at least one terminal device and at least one network device. The network device can send downlink signals to the terminal device, and/or the terminal device can send uplink signals to the network device.
  • the terminal device in this application embodiment can be a device or module that accesses the aforementioned communication system and has corresponding communication functions.
  • the terminal device can include various devices with wireless communication functions, which can be used to connect people, objects, machines, etc.
  • the terminal device typically contains a communication module, circuit, or chip that performs the corresponding communication function.
  • the terminal can also be configured with program instructions for performing the corresponding communication function.
  • the terminal device can be widely used in various scenarios, such as: cellular communication, D2D, V2X, peer-to-peer, M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc.
  • the terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc.
  • Terminal equipment can be user equipment (UE), terminal, fixed equipment, mobile station equipment or mobile equipment, subscriber unit, handheld device, vehicle-mounted equipment, wearable device, cellular phone, smartphone, session initiation protocol (SIP) phone, wireless data card, personal digital assistant (PDA) according to the 3GPP standard.
  • UE user equipment
  • terminal fixed equipment
  • mobile station equipment or mobile equipment subscriber unit
  • handheld device vehicle-mounted equipment
  • wearable device cellular phone
  • smartphone session initiation protocol
  • SIP session initiation protocol
  • wireless data card wireless data card
  • PDA personal digital assistant
  • Terminal devices include computers, tablets, laptops, wireless modems, handsets, laptop computers, computers with wireless transceiver capabilities, smart books, vehicles, satellites, global positioning system (GPS) devices, target tracking devices, aircraft (e.g., drones, helicopters, multi-helicopters, quad-helicopters, or airplanes), ships, remote control devices, smart home devices, industrial equipment, transportation vehicles with wireless communication capabilities, communication modules, roadside units (RSUs) with terminal capabilities, or devices built into the above devices (e.g., communication modules, modems, or chips in the above devices), or other processing devices connected to a wireless modem.
  • the terminal device will be described below as a terminal or UE.
  • a UE can also be used as a base station.
  • a UE can act as a scheduling entity, providing sidelink signaling between UEs in scenarios such as V2X, D2D, or end-to-end.
  • the device for implementing the functions of a terminal device can be the terminal device itself, or it can be any device capable of supporting the terminal device in implementing the functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions).
  • This device can be installed in the terminal device.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • the device can also be configured with program instructions for performing corresponding communication functions.
  • the network device in this application embodiment can be a device or module with corresponding communication functions.
  • the network device can be a device used to communicate with terminal devices; it can also be called an access network device or a wireless access network device, such as a base station.
  • the network device can refer to a radio access network (RAN) node (or device) that connects terminal devices to a wireless network.
  • RAN radio access network
  • a base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), gNB (gNB) in future communication networks, relay station, access point, transmitting and receiving point (TRP), transmitter, master station, auxiliary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • a base station can be a macro base station, micro base station, relay node, donor node, or similar entities, or combinations thereof.
  • a base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus.
  • a base station can also be a mobile switching center, a device performing base station functions in D2D, V2X, and M2M communications, a network-side device in future networks, or a device performing base station functions in future communication systems.
  • a base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station.
  • a helicopter or drone can be configured as a device to communicate with another base station.
  • the network devices mentioned in the embodiments of this application may be devices including CU, DU, or CU and DU, or devices with control plane CU nodes (central unit-control plane (CU-CP)) and user plane CU nodes (central unit-user plane (CU-UP)) and DU nodes.
  • the network devices may include gNB-CU-CP, gNB-CU-UP, and gNB-DU.
  • RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing some of the base station's functions.
  • RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or radio units (RUs).
  • CUs and DUs can be set up separately or included in the same network element, such as a BBU.
  • RUs can be included in radio equipment or radio units, such as RRUs, AAUs, or RRHs.
  • the CU Core Unit
  • the CU is a logical node that carries the RRC (Resource Control Code) layer, Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, and other control functions of the access network equipment.
  • the CU connects to network nodes such as the core network through interfaces, which may be E2 interfaces, etc.
  • the CU possesses some core network functions.
  • the CU e.g., the PDCP layer and higher layers
  • connects to the DU e.g., the Radio Link Control (RLC) layer and lower layers
  • RLC Radio Link Control
  • these interfaces can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.).
  • C-Plane control plane
  • U-Plane user plane
  • the F1 application protocol (F1AP) is the application protocol for the F1 interface, and in some examples, it defines the F1 signaling procedures.
  • the F1 interface supports the control plane (F1 control plane, F1-C) and the user plane (F1 user plane, F1-U).
  • the CU can be split into CU-CP and CU-UP.
  • CU-CP is a logical node carrying the RRC layer and the control plane part of PDCP (PDCP-C) layer, used to implement the CU's control plane functions.
  • CU-CP can interact with network elements in the core network used to implement control plane functions. These network elements in the core network can be access and mobility function network elements.
  • CU-UP is a logical node carrying the SDAP layer and the user plane part of PDCP (PDCP-U) layer, used to implement the CU's user plane functions.
  • CU-UP can interact with network elements in the core network used to implement user plane functions.
  • CU and DU configurations are merely examples; the functions of CU and DU can be configured as needed.
  • CU or DU can be configured to have more protocol layer functions, or CU or DU can be configured to have only partial protocol layer processing functions.
  • some functions of the RLC layer and the functions of the protocol layer above the RLC layer can be placed in the CU, while the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer can be placed in the DU.
  • the functions of the CU or DU can be divided according to service type or other system requirements. For instance, based on latency, functions that need to meet low latency requirements can be placed in the DU, while functions that do not need to meet such latency requirements can be placed in the CU.
  • the DU (Distributed Unit) is a logical node that carries the RLC (Real-Time Control) layer, the medium access control (MAC) layer, the higher physical layer (Higher PHY) layer, and other functions.
  • the DU can control at least one RU (Remote Root).
  • the DU connects to the RU through interfaces, which can be fronthaul interfaces.
  • the Higher PHY layer includes the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation, and demodulation.
  • FEC forward error correction
  • the RU is a logical node that carries both lower physical layer (PHY) and radio frequency (RF) processing.
  • the RU can be a TRP, RRH, or other similar entity.
  • the Low-PHY includes portions of the PHY processing, such as Fast Fourier Transform (FFT), Inverse Fast Fourier Transform (IFFT), digital beamforming, and filtering.
  • FFT Fast Fourier Transform
  • IFFT Inverse Fast Fourier Transform
  • the RU communicates with one or more UEs via a radio link.
  • the DU and RU can be co-located or not.
  • the DU and RU exchange control plane and user plane information via a lower-layer split-control, user, and synchronization (LLS-CUS) interface through the fronthaul link.
  • LLS-CUS may include interfaces providing control and user plane information respectively.
  • the control plane refers to real-time control between the DU and RU.
  • the DU and RU exchange management information via a lower-layer split management (LLS-M) interface on the fronthaul link; the management plane (M-Plane) refers to non-real-time management operations between the DU and RU.
  • LLC-M lower-layer split management
  • M-Plane management plane
  • a DU and RU can cooperate to implement the functions of the PHY layer.
  • a DU can be connected to one or more RUs.
  • the functions of DU and RU can be configured in various ways depending on the design. For example, a DU can be configured to implement baseband functions, and an RU can be configured to implement mid-RF functions. Another example is that a DU can be configured to implement higher-level functions in the PHY layer, and an RU can be configured to implement lower-level functions in the PHY layer, or to implement both lower-level and RF functions. Higher-level functions in the physical layer can include a portion of the physical layer's functions that are closer to the MAC layer, while lower-level functions in the physical layer can include another portion of the physical layer's functions that are closer to the mid-RF side.
  • the processing unit in the BBU used to implement baseband functions is called the baseband high (BBH) unit
  • the processing unit in the RRU/AAU/RRH used to implement baseband functions is called the baseband low (BBL) unit.
  • CU including open CU-CP (O-CU-CP) and open CU-UP (O-CU-UP), DU, or RU
  • O-CU open central unit
  • DU can also be called an open distributed unit
  • CU-CP can also be called O-CU-CP
  • CU-UP can also be called O-CU-UP
  • RU can also be called an open radio unit (O-RU).
  • this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.
  • the device for implementing the functions of a network device can be a network device itself, or a device capable of supporting the network device in implementing those functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions).
  • This device can be installed within the network device.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • the device can be configured with program instructions for performing corresponding communication functions. This embodiment only uses a network device as an example to illustrate the device for implementing the functions of a network device, and does not limit the solution of this embodiment.
  • Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.
  • terminal devices and network devices can be hardware devices, software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal devices and network devices.
  • FIG. 1 is a schematic diagram of a wireless communication system applicable to an embodiment of this application.
  • the wireless communication system includes a wireless access network 100.
  • the wireless access network 100 can be a future network (e.g., a higher version) or a traditional (e.g., 5G or 4G) wireless access network.
  • One or more terminal devices (120a-120j, collectively referred to as 120) can be interconnected or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the wireless access network 100.
  • Network elements in the wireless communication system are connected through interfaces (e.g., NG, Xn) or air interfaces.
  • the wireless communication system may also include other devices, such as core network (CN) devices, wireless relay devices and/or wireless backhaul devices, which are not shown in Figure 1.
  • CN core network
  • FIG. 2 is another schematic diagram of a wireless communication system applicable to embodiments of this application.
  • the wireless communication system may include core network equipment, access network equipment (such as RAN), and terminal equipment.
  • the access network equipment communicates with the core network equipment through a backhaul link and with the terminal equipment through an air interface.
  • the BBU in the access network equipment communicates with the core network through a backhaul link
  • the RU in the access network equipment communicates with the terminal equipment through an air interface.
  • the BBU can communicate with the RU through a fronthaul link.
  • the BBU and RU may or may not be co-located.
  • the BBU includes at least one CU and at least one DU, and the CU and DU can communicate with each other through a midhaul link.
  • FIG. 2 above is only a schematic diagram for ease of understanding.
  • This wireless communication system may also include other devices, which are not shown in Figure 2.
  • MIMO Multiple-input multiple-output
  • MIMO technology utilizes spatial dimension resources to enable signals to obtain array gain, multiplexing and diversity gain, and interference cancellation gain in space without increasing system bandwidth, thereby multiplying the capacity and spectral efficiency of communication systems.
  • Channel Estimation In communication systems, estimating the uplink or downlink channel is essential for transmitting and receiving data, obtaining system synchronization and feedback channel information.
  • Channel estimation refers to the process of reconstructing or recovering the received signal to compensate for signal distortion caused by channel fading and noise fading. It uses reference signals known to the transmitter and receiver to measure the time and frequency domain changes of the channel.
  • the aforementioned reference signal can also be called a pilot signal or reference signal (RS).
  • RS reference signal
  • the reference signal is distributed across different resource elements (REs) within the orthogonal frequency division multiplexing (OFDM) symbol and has known amplitude and phase.
  • each transmit antenna has an independent channel.
  • the NR system defines various pilot signals, such as the channel state information-reference signal (CSI-RS), the demodulation reference signal (DMRS), and the sounding reference signal (SRS).
  • CSI-RS is used to assist in the demodulation of the physical downlink shared channel (PDSCH).
  • CSI-RS is used for downlink channel measurement corresponding to the physical antenna port.
  • the receiver performs channel estimation for each antenna port transmitted by the base station and uses the estimation results to provide channel state information (CSI) feedback.
  • CSI includes information such as channel quality indicator (CQI), precoding matrix indicator (PMI), layer indicator (LI), and rank indicator (RI).
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • LI layer indicator
  • RI rank indicator
  • the base station estimates the uplink channel through the received SRS and can perform frequency selection resource scheduling, power control, timing estimation and modulation, coding scheme order selection, and downlink precoding generation in TDD based on this information.
  • Circular buffer During uplink transmission, in order to ensure that the codeword transmitted uplink can be successfully decoded by the base station, the terminal device will not clear the circular buffer of the codeword before the base station sends back an acknowledgment (ACK) signal to confirm the successful transmission.
  • ACK acknowledgment
  • the terminal device During downlink transmission, when the terminal device fails to decode, it will send an ACK signal indicating decoding failure to the base station. To ensure that the codewords transmitted in the downlink can be decoded successfully, the terminal device will not clear the circular buffer of the codeword before the information of the codeword is successfully decoded, and will continuously add the received retransmission information until the decoding is successful or the maximum number of retransmissions is reached.
  • Hybrid Automatic Repeat Request (HARQ) process This refers to the data transmission process that uses HARQ technology.
  • HARQ technology can be used during data transmission to improve data transmission reliability.
  • the receiving end can use cyclic redundancy check (CRC) to detect whether the received data packet is erroneous. After receiving an erroneous data packet, the receiving end will retain the data packet and send a retransmission request to the sending end. After the sending end retransmits the data packet, the receiving end will merge the erroneous data packet and the retransmitted data packet together for decoding, thereby improving the decoding success rate.
  • CRC cyclic redundancy check
  • a physical uplink shared channel (PUSCH) used for uplink data transmission corresponds to a HARQ process number, uniquely identifying a HARQ process.
  • the HARQ process number can be used to indicate to the terminal device which PUSCH the data carried has an error and needs to be retransmitted. This facilitates the terminal device in retransmitting the corresponding data.
  • the terminal device can use the PUSCH with the same HARQ process number for retransmission. In this way, the access network device can merge the data stored in the corresponding HARQ buffer with the retransmitted data; this process is called soft merging.
  • Codeword This can be encoded bits (e.g., including channel coding). The codeword is scrambled to generate scrambled bits.
  • ILBRM Limited Buffer Rate Matching
  • the buffer size Ncb of the uplink shared channel HARQ is affected by whether LBRM is enabled.
  • REs resource elements
  • I LBRM parameter indication based on RRC configuration is not flexible enough and cannot adapt to the rapidly changing memory availability of the terminal device in large-scale MIMO high-throughput transmission scenarios. This can result in insufficient memory availability for HARQ retransmission (or terminal device memory redundancy), affecting transmission performance.
  • this application provides a communication method to improve the flexibility of buffer size limit indication and ensure transmission performance.
  • the communication method provided in this application can be applied to systems that communicate using multi-antenna technology, such as the communication system 100 shown in FIG1.
  • This communication system may include at least one network device and at least one terminal device.
  • first communication device in this application can refer to the first communication device itself (e.g., a network device), a component in the first communication device (e.g., a processor, chip, or chip system), or a logic module or software that can implement all or part of the functions of the first communication device.
  • the method provided in the embodiments of this application can be executed by a second communication device.
  • second communication device in this application can refer to the second communication device itself (e.g., a terminal device), a component in the second communication device (e.g., a processor, chip, or chip system), or a logic module or software that can implement all or part of the functions of the second communication device.
  • FIG. 3 is a schematic flowchart of a communication method provided in an embodiment of this application, including the following steps:
  • the first communication device receives first instruction information from the second communication device, and correspondingly, the second communication device sends the first instruction information to the first communication device.
  • the second communication device can send a first indication message to the first communication device via uplink control information (UCI).
  • UCI uplink control information
  • the second communication device sends a UCI to the first communication device, the UCI including the first indication message, or the UCI being the aforementioned first indication message.
  • the first indication information is used to indicate the status of the memory reserves of the second communication device. These memory reserves are used to support the storage of codewords in the circular buffer of the first communication device. For example, if the memory reserves of the first communication device are insufficient to support the size of its circular buffer, HARQ retransmission may be impossible, affecting transmission performance.
  • the first indication information is used to indicate the remaining memory status of the second communication device, including but not limited to the following possible methods:
  • Method 1.1 The first indication information indicates whether there is sufficient memory remaining.
  • the first indication information occupies 1 bit. When the bit value of the first indication information is 0, it indicates that the memory is insufficient. When the bit value of the first indication information is 1, it indicates that the memory is sufficient.
  • Method 1.2 The first indication information indicates the amount of memory remaining.
  • the first indication information occupies at least one bit, and the value of this at least one bit can accurately represent the current memory balance of the first communication device.
  • the first indication information can indicate an index, and different indices correspond to different memory balance values.
  • the first indication information indicates the ratio of available memory to the memory required for data transmission.
  • the transmitted data can be downlink data received by the second communication device or uplink data sent by the second communication device.
  • the first indication information can also indicate the status of memory balance through other indication methods, such as the first indication information indicating the difference between the current memory balance and the memory balance reported last time, etc., which will not be illustrated here.
  • the method by which the first communication device reports the remaining memory through the first indication information can be configured by the second communication device.
  • the second communication device instructs the first communication device to report the remaining memory through the third indication information, it can also instruct the first communication device on the method of reporting the remaining memory.
  • the third indication information may include information #1, which indicates whether the memory remaining space reported by the first communication device is sufficient; or the third indication information may include information #2, which indicates the size of the memory remaining space reported by the first communication device; or the third indication information may include information #3, which indicates the ratio of the memory remaining space reported by the first communication device to the memory size required for data transmission, and so on.
  • the first communication device may instruct the second communication device on the specific method of reporting the memory balance through other information besides the third instruction information.
  • the second communication device determines the remaining memory of the second communication device. Therefore, the method flow shown in Figure 3 further includes:
  • the second communication device determines the remaining memory of the second communication device.
  • the second communication device can determine the current memory availability based on at least one of the following parameters corresponding to the currently transmitted uplink data:
  • the current memory allowance is determined by factors such as bandwidth, number of codewords, number of streams, modulation order, retransmission feedback interval, subcarrier interval, codeword size, total memory of the second communication device, or memory usage of other functions of the second communication device itself.
  • the second communication device can determine the current memory balance after sending uplink data to the first communication device; or, for example, the second communication device can determine the current memory balance before sending uplink data to the first communication device.
  • the communication method may further include: the second communication device sending uplink data to the first communication device, for example, the second communication device sending a PUSCH to the first communication device.
  • the first communication device may send HARQ feedback to the second communication device, wherein the uplink HARQ feedback can be referred to the description of uplink HARQ feedback in the relevant current art, and will not be described in detail here.
  • memory balance can also be determined in other ways, such as determining memory balance based on the transmission status of relevant historical data during uplink transmission, etc., which will not be illustrated here.
  • the second communication device calculates the size of the uplink data transmitted within a certain bandwidth and time period, i.e., the memory size occupied by the uplink data.
  • the second communication device determines the memory size occupied by its other functions.
  • Memory remaining Total memory of the second communication device - Memory occupied by uplink data - Memory occupied by other functions.
  • the number of symbols corresponding to the time length from signal transmission to retransmission feedback / 8 is used to convert from bits to bytes.
  • QAM quadrature amplitude modulation
  • the second communication device can calculate the memory occupied by uplink data based on parameters such as the number of uplink data streams, the number of streams corresponding to each codeword, the codeword size, and the number of codewords.
  • the memory occupied by uplink data the size of the codeword (number of bits) * the number of codewords * the number of streams corresponding to each codeword * the number of streams.
  • the second communication device can determine the current memory availability based on at least one of the following parameters corresponding to the currently received downlink data:
  • Bandwidth number of codewords, decoding result of downlink data, number of streams, modulation order, retransmission feedback interval, subcarrier interval, codeword size, total memory of the second communication device, or memory occupied by other functions of the second communication device itself, etc.
  • the communication method may further include: the first communication device sending downlink data to the second communication device, for example, the second communication device sending a PDSCH to the first communication device. Additionally, after receiving the downlink data, the second communication device may perform data decoding. Optionally, the second communication device may send HARQ feedback to the first communication device.
  • the downlink HARQ feedback can be referred to in the description of downlink HARQ feedback in current related technologies, and will not be described in detail here.
  • the method by which the second communication device determines the current memory balance based on the relevant parameters of the currently transmitted downlink data is merely an example and does not constitute any limitation on the scope of protection of this application. In the scenario of downlink transmission, other methods can also be used to determine the memory balance, which will not be illustrated here.
  • the second communication device calculates the size of the downlink data transmitted within a certain bandwidth and time period, i.e., the memory size occupied by the downlink data.
  • the second communication device determines the memory size occupied by its other functions.
  • Memory remaining Total memory of the second communication device - Memory occupied by downlink data - Memory occupied by other functions.
  • the second communication device can also determine the current memory balance in other ways.
  • the second communication device can determine the current memory balance based on historical communication data; or, for example, the second communication device can determine the current memory balance based on the instructions of a management device (such as operation administration and maintenance, OAM), etc., and these will not be illustrated in detail here.
  • a management device such as operation administration and maintenance, OAM
  • the first communication device can determine the current memory balance of the second communication device based on the first instruction information, and send a second instruction information (e.g., I LBRM ) to the second communication device according to the current memory balance of the second communication device, instructing the second communication device to perform memory operations.
  • a second instruction information e.g., I LBRM
  • the first communication device sends a second instruction message to the second communication device, and correspondingly, the second communication device receives the second instruction message from the first communication device.
  • the second indication information is used to indicate the size limit of the circular buffer of the second communication device. This second indication information is determined based on the memory remaining amount reported by the second communication device.
  • the first communication device can send second indication information to the second communication device via downlink control information (DCI).
  • DCI downlink control information
  • the first communication device sends a DCI to the second communication device, the DCI including the second indication information, or the DCI is the aforementioned second indication information.
  • the second indication information is used to indicate one of the following:
  • the transmitted data can be downlink data received by the second communication device or uplink data transmitted by the second communication device.
  • the modulation order of the transmitted data can be the modulation order of the downlink data received by the second communication device, or the modulation order of the uplink data transmitted by the second communication device.
  • the first communication device determines, based on the memory availability of the second communication device and the actual maximum number of information bits to be transmitted, that the memory availability is less than the actual maximum number of information bits to be transmitted, the actual number of transmitted bits can be reduced.
  • the reduction in the actual number of transmitted bits can be achieved in the following manner:
  • the modulation order of the transmitted data can be reduced, such as by adjusting the modulation stage of the transmitted data from 1024 quadrature amplitude modulation (QAM) to 256 QAM.
  • QAM quadrature amplitude modulation
  • the transmission bandwidth of data can be reduced, such as by reducing it from 100MHz to 50MHz.
  • the number of data streams can be reduced, such as by reducing the number of data streams from 20 to 10.
  • the first communication device determines the codeword rate based on the memory availability of the second communication device, including:
  • the first communication device determines the actual number of HARQs it can support based on "memory margin" and "memory size per HARQ process * number of HARQs". If the memory margin is less than the actual maximum number of information bits that can be transmitted, the actual maximum number of information bits that can be transmitted can be reduced, i.e., the codeword rate can be increased. For example, the transmitted information data can remain unchanged while reducing the transmission of parity bits. Optionally, the smaller the memory margin, the higher the codeword rate determined by the first communication device.
  • the first communication device determines the number of HARQ processes based on the remaining memory of the second communication device, including:
  • the first communication device determines the actual number of HARQs it can support based on "memory margin" and "memory size occupied by each HARQ process * number of HARQs". If the memory margin is less than the actual maximum number of information bits to be transmitted, the number of HARQ processes can be reduced.
  • the second indication information can indicate different circular buffer usage limits.
  • the second indication information can indicate multiple different code rates (e.g., code rates of 0.5, 0.7, 0.8, and 0.9 can be indicated using two bits: 00 indicates 0.5, 01 indicates 0.7, 10 indicates 0.8, and 11 indicates 0.9).
  • the first communication device determines the code rate that the second communication device can currently support based on the available memory (code rate #1, e.g., 0.75). Therefore, the first communication device can determine the code rate indicated by the second indication information based on the determined code rate #1 and the multiple code rates that the second indication information can indicate.
  • the second indication information of 10 indicates a code rate of 0.8.
  • the first communication device can instruct the second communication device to adjust the currently executed service, such as reducing, adjusting, or suspending certain services. For instance, instructing the second communication device to turn off high-precision services.
  • “memory margin less than margin threshold” can be understood as follows: when the memory margin of the second communication device is insufficient to support the number of HARQ processes in the current circular buffer, the first communication device can use the second indication information (e.g., dynamic LBRM indication) to limit the maximum number of HARQ processes for data transmission, increase the code rate of the codeword, reduce the modulation order of the transmitted data, reduce the number of streams of the transmitted data, or reduce the transmission bandwidth of the transmitted data.
  • the second indication information e.g., dynamic LBRM indication
  • the first communication device can use the second indication information (e.g., dynamic LBRM indication) to increase the maximum number of HARQ processes for transmitted data, reduce the code rate of the codeword, increase the modulation order of transmitted data, increase the number of streams of transmitted data, or increase the transmission bandwidth of transmitted data.
  • the second indication information e.g., dynamic LBRM indication
  • the second indication information may occupy one bit.
  • the value of this one bit is used to indicate whether the use of the circular buffer is restricted or not. Restricting the use of the circular buffer can be understood as indicating the use of a finite buffer, and not restricting the use of the circular buffer can be understood as indicating that the finite buffer is not used. For example, a value of 0 indicates that the finite buffer is not used, and a value of 1 indicates that the finite buffer is used.
  • the content indicated by the second indication information can refer to the existing 1-bit design of LBRM indications, using one bit to indicate the corresponding content.
  • the second indication information in this application is determined based on the memory remaining amount reported by the second communication device. Compared with the existing LBRM indications, this takes into account the memory remaining amount of the second communication device, reducing the risk that the second communication device cannot decode correctly due to insufficient memory and improving transmission performance.
  • the second indication information may occupy multiple bits, and the different values of these multiple bits are used to indicate at least one of the following: different code rates of codewords, different modulation orders of transmitted data, different number of transmitted data streams, different transmission bandwidths of transmitted data, or different number of HARQ processes of transmitted data. That is, multiple bits can provide more flexible indication; if the values of the bits are different, it indicates that the indicated parameters are also different. For example, different values indicating the code rate of a codeword can be achieved by using different values of multiple bits.
  • the second indication information occupies two bits.
  • the bit value is 00, it indicates that the codeword's code rate is code rate #1 and the maximum number of HARQ processes is HARQ process number #1; when the bit value is 01, it indicates that the codeword's code rate is code rate #2 and the maximum number of HARQ processes is HARQ process number #2; when the bit value is 10, it indicates that the codeword's code rate is code rate #3 and the maximum number of HARQ processes is HARQ process number #3; when the bit value is 11, it indicates that the codeword's code rate is code rate #4 and the maximum number of HARQ processes is HARQ process number #4.
  • code rate #1 is less than code rate #2, code rate #2 is less than code rate #3, and code rate #3 is less than code rate #4; the number of HARQ processes #1 is less than the number of HARQ processes #2, the number of HARQ processes #2 is less than the number of HARQ processes #3, and the number of HARQ processes #3 is less than the number of HARQ processes #4.
  • the second communication device can perform memory operations based on the second instruction information. Therefore, the method flow shown in Figure 3 further includes:
  • the second communication device for downlink transmission, the second communication device, based on the code rate, modulation order, number of streams, transmission bandwidth, or maximum HARQ process limit indicated by the second indication information, merges the received codewords according to the code rate indicated by the second indication information, reduces memory usage, changes the corresponding maximum HARQ process limit, and clears unused HARQ processes. After performing the above operations, the second communication device then performs decoding.
  • the merging of codewords received by the second communication device according to the code rate indicated by the second indication information includes:
  • the first communication device After the first communication device determines all the codeword bits to be transmitted, the first communication device indicates whether the circular buffer is enabled and whether the actual transmission code rate (e.g., the codeword code rate) is adjusted through the second indication information mentioned above.
  • the second communication device can merge the codewords received multiple times according to the instructions of the second indication information.
  • Step 1 The first communication device determines that all codeword bits to be transmitted are: 01010101111100000000010000.
  • Step 2 The first communication device opens the buffer through the second indication information mentioned above, that is, the actual codeword bits to be transmitted are: 01010101111100000.
  • Step 3 During the first transmission (initial transmission), the first communication device sends a portion (or all) of the above codeword bits to the second communication device according to the actual situation: 010101011111.
  • Step 4 The second communication device fails to decode and sends a retransmission request message to the first communication device. This retransmission request message is used to request the first communication device to retransmit the information.
  • Step 5 The first communication device retransmits the data to the second communication device.
  • the first communication device can shift the codeword bits by a certain position during the retransmission process, based on the codeword bits from the first transmission.
  • the retransmitted codeword bits could be: 101111100000.
  • Step Six The second communication device performs codeword merging.
  • the codeword merging performed by the second communication device includes merging the decoding soft information of bits that are actually in the same position in the initial transmission and retransmission. For instance, for bit 1011111, which is in the same position in both the initial and retransmission, the second communication device can merge the decoding results of 1011111 twice to improve decoding accuracy. Specifically, the second communication device can determine which bits can be merged based on the second indication information.
  • the second communication device for uplink transmission, the second communication device, based on the code rate, modulation order, number of streams, transmission bandwidth, or maximum HARQ process limit indicated by the second indication information, truncates the encoded codeword proportionally (or compares the code rate indicated by the second indication information with the minimum code rate, sets a new code rate, and truncates according to that code rate), and changes the corresponding maximum HARQ process limit.
  • the second communication device then performs the next round of uplink data transmission based on the DCI retransmission schedule, ACK feedback, or HARQ feedback from the first communication device.
  • the second communication device truncates the encoded codeword by a corresponding proportion, including:
  • the second communication device After the second communication device determines all the codeword bits to be transmitted, it determines whether the circular buffer is open and the corresponding transmission rate through the aforementioned second indication information. Thus, the second communication device can truncate the encoded codewords according to the instructions of the second indication information.
  • Step 1 The second communication device determines that all codeword bits to be transmitted are: 010101011111000000000100000.
  • Step Two The second communication device determines whether the circular buffer is enabled and the bitrate after enabling it (e.g., the actual bitrate and/or the bitrate indicated by the second indication information) based on the second indication information from the first communication device, thereby determining the size of the buffer. For example, if the original bitrate of 27 bits is 18 bits long, and the bitrate indicated by the second indication information is 2/3, then 1/3 bitrate of 27 bits long will be transmitted. Another example: if the actual bitrate of the original 27 bits is 1/3 (meaning the actual information length is 9 bits), and the new actual bitrate indicated by the second indication information is 1/2 (meaning the new information length is 18 bits), then both the bitrate indicated by the second indication information and the new bitrate are determined based on the value of the second indication information.
  • Step 3 The second communication device truncates the codeword.
  • the truncated codeword bits are: 010101011111000000.
  • the first communication device can determine the actual number of HARQ processes that can be supported based on the number of bits per HARQ process and the amount of memory remaining reported by the second communication device (e.g., in, (Indicates rounding down), the second indication information can indicate the actual number of HARQ processes that can be supported, so that the second communication device can adjust the number of HARQ processes based on the second indication information.
  • the triggering methods for the first communication device to determine and report the remaining memory in this embodiment include, but are not limited to, the following two methods:
  • Method 1 The first communication device triggers the second communication device to perform a margin calculation and report it through the third indication information.
  • the method flow shown in Figure 3 further includes:
  • the first communication device sends a third instruction message to the second communication device, and correspondingly, the second communication device receives the third instruction message from the first communication device.
  • the third instruction information is used to indicate the reported memory balance.
  • the first communication device may send the aforementioned third instruction information via at least one of the following:
  • DCI Downlink Control element
  • RRC Radio Resource Control
  • CE MAC control element
  • the first communication device may also send third instruction information to the second communication device in other ways, such as by adding signaling.
  • the first communication device may send a third instruction message to the second communication device during the initial access phase of the second communication device.
  • the second communication device when the second communication device initially connects, the second communication device sends capability information to the first communication device.
  • This capability information is used to indicate the communication capabilities of the second communication device, and the first communication device sends third indication information to the second communication device.
  • Method 2 The second communication device determines whether the preset first condition is met, and if the first condition is met, performs a margin calculation and reports it.
  • the method flow shown in Figure 3 further includes:
  • the second communication device determines that the first condition is met.
  • the first condition is used to determine whether to report the remaining memory. For example, if the first condition is met, it is determined to report the remaining memory; or, if the first condition is not met, it is determined not to report the remaining memory.
  • the first condition includes, but is not limited to, at least one of the following:
  • the number of transmit/receive antennas of the second communication device is greater than a first threshold; the maximum rank of the channel of the second communication device is greater than a second threshold; the number of streams scheduled by the second communication device is greater than a third threshold; the number of circular buffer codewords of the second communication device is greater than a fourth threshold; the communication bandwidth of the second communication device is greater than a fifth threshold; the modulation order of the data transmitted by the second communication device is greater than a sixth threshold; the retransmission feedback delay of the data transmitted by the second communication device is greater than a seventh threshold; the total memory of the second communication device is less than an eighth threshold; or the memory occupied by other functions of the second communication device is greater than a ninth threshold.
  • first, second, third, fourth, fifth, sixth, seventh, eighth, or ninth thresholds is not limited in any way; they can be thresholds negotiated between the second and first communication devices, thresholds configured by the first communication device, or thresholds predefined by the protocol, etc.
  • the maximum rank of the channel of the second communication device is related to the number of transmitting and receiving antennas of the second communication device.
  • the transmitting antenna to the receiving antenna of the second communication device constitutes the channel matrix. The more transmitting and receiving antennas the second communication device has, the larger the channel matrix becomes, and thus the rank of the channel matrix increases.
  • the number of streams scheduled by the second communication device is related to the channel matrix corresponding to the transceiver antennas of the second communication device, wherein the larger the rank of the channel matrix, the more streams can be transmitted.
  • the number of streams scheduled by the second communication device (or the number of streams transmitted by the second communication device) may be less than the rank.
  • the modulation order of the data transmitted by the second communication device can be the modulation order of the data received by the second communication device, or the modulation order of the data sent by the second communication device.
  • the retransmission feedback delay of the data transmitted by the second communication device can be the retransmission feedback delay of the data received by the second communication device, or the retransmission feedback delay of the data sent by the second communication device.
  • the first condition is that the number of transmit and receive antennas of the second communication device is greater than the first threshold, it can be understood that: the more transmit and receive antennas the terminal device has, the more streams the second communication device transmits, and thus the more codewords are transmitted.
  • the corresponding maximum number of HARQ processes will also increase. At this time, whether it is uplink or downlink, the memory occupied by the circular buffer of the terminal device will become larger and larger, which may lead to insufficient memory.
  • the first condition is that the maximum rank of the channel of the second communication device is greater than the second threshold, it can be understood that: the larger the maximum rank of the terminal device, the larger the maximum number of streams transmitted by the second communication device during data transmission, and thus the more codewords are transmitted, and the corresponding maximum number of HARQ processes will also increase. At this time, whether it is uplink or downlink, the memory occupied by the circular buffer of the terminal device will become larger and larger, which may lead to insufficient memory.
  • the first condition is that the number of streams scheduled by the second communication device is greater than the third threshold, it can be understood that the more streams scheduled by the second communication device, the more codewords are transmitted, and the corresponding maximum number of HARQ processes will also increase. At this time, whether it is uplink or downlink, the memory occupied by the circular buffer of the terminal device will become larger and larger, which may lead to insufficient memory.
  • the first condition is that the number of codewords in the circular buffer of the second communication device is greater than the fourth threshold, it can be understood that: if the number of codewords in the circular buffer of the second communication device is large, that is, more 0 and 1 bits are transmitted, the memory occupied is large, and the memory occupied by the circular buffer of the terminal device will become larger and larger, which may lead to insufficient memory.
  • the first condition is that the communication bandwidth of the second communication device is greater than the fifth threshold, it can be understood that: the larger the bandwidth, the more data is transmitted under the same spectral effect, the more memory is occupied, and the memory occupied by the circular buffer of the terminal device will become larger and larger, which may lead to insufficient memory.
  • the modulation order of the data transmitted by the second communication device e.g., 256QAM, 1024QAM, etc.
  • the sixth threshold it can be understood that the larger the modulation order of the data, the larger the memory occupied by the data, and the larger the memory occupied by the circular buffer of the terminal device will be, which may lead to insufficient memory.
  • the first condition is that the retransmission feedback delay of the data transmitted by the second communication device is greater than the seventh threshold, it can be understood that: the greater the data retransmission feedback delay, the greater the corresponding maximum HARQ process delay, and the larger the memory occupied by the circular buffer of the terminal device will be, which may lead to insufficient memory.
  • the first condition is that the total memory of the second communication device is less than the eighth threshold, it can be understood that the smaller the total memory of the second communication device, the less memory is available in the circular buffer of the end device, which may lead to insufficient memory.
  • the first condition is that the memory occupied by other functions of the second communication device is greater than the ninth threshold, it can be understood that the larger the memory occupied by other functions of the second communication device, the smaller the available memory in the circular buffer of the terminal device will be, which may lead to insufficient memory.
  • the first condition can be presented in the form of a table.
  • the setting of the first condition can be determined based on the configuration of the terminal devices in the current NR communication system. If the configuration of the second communication device conforms to the configuration of the terminal devices in the current NR communication system, the second communication device can determine not to report the memory remaining amount. For example, if the number of transceiver antennas of the second communication device is less than or equal to the first threshold, the second communication device can not report the memory remaining amount. If the configuration of the second communication device does not conform to the configuration of the terminal devices in the current NR communication system, the second communication device can determine to report the memory remaining amount. For example, if the number of transceiver antennas of the second communication device is greater than the first threshold, the second communication device can determine to report the memory remaining amount.
  • the second communication device may also determine whether to report the memory balance based on other conditions, such as the capability information of the second communication device, the frequency point information where the current second communication device is located, etc., which will not be listed here.
  • the method flow shown in Figure 3 further includes the following: The first communication device determines whether to report the remaining memory based on whether the first condition is met, which may be indicated by the second communication device.
  • the first communication device sends a fourth instruction message to the second communication device, and correspondingly, the second communication device receives the fourth instruction message from the first communication device.
  • the fourth indication information is used to instruct the second communication device to report the remaining memory when the first condition is met.
  • the fourth indication information is used to indicate that if the first condition is not met, it is not necessary to report the remaining memory; or, the fourth indication information is used to indicate that if the second condition is met, it is not necessary to report the remaining memory.
  • the first communication device may send the aforementioned fourth instruction information via RRC and/or MAC CE.
  • the second communication device can determine the first time to send the first indication information based on the memory balance reporting period or reference time.
  • the reporting period indicates the period for reporting the memory balance
  • the reference time includes the time when uplink data is sent, the time when uplink Hybrid Automatic Repeat Request (HARQ) feedback is sent, or the time when downlink data is received.
  • HARQ Hybrid Automatic Repeat Request
  • the second communication device can periodically report its memory remaining capacity to the first communication device; for example, in an uplink transmission scenario, the second communication device can report its memory remaining capacity to the first communication device within a certain period of time after sending uplink data to the first communication device; for example, in a downlink transmission scenario, the second communication device can report its memory remaining capacity to the first communication device within a certain period of time after sending uplink HARQ feedback to the first communication device; for example, in a downlink transmission scenario, the second communication device can report its memory remaining capacity to the first communication device within a certain period of time after receiving downlink data from the first communication device.
  • the timing for the second communication device to report the remaining memory may be predefined by the protocol, negotiated by the first and second communication devices, or indicated by the first communication device through the fifth indication information.
  • the fifth indication information may also indicate the period or time interval at which the first communication device reports memory balance.
  • the fifth instruction information is also used to instruct the second communication device to report its remaining memory after a first duration following the uplink data report.
  • This first duration can be a preset value, referred to as a time interval.
  • the fifth instruction information includes information #4, which instructs the second communication device to report its current remaining memory to the first communication device after the first duration following each uplink data upload.
  • the fifth indication information is also used to instruct the second communication device to periodically report the memory balance, wherein the reporting period of the memory balance can be indicated by the fifth indication information or can be predefined.
  • the fourth indication information is also used to instruct the second communication device to report the remaining memory after a second duration of sending uplink HARQ feedback, where the second duration can be a preset value, which can be called a time interval.
  • the fifth indication information includes information #5, which is used to instruct the second communication device to report the current remaining memory to the first communication device after each second duration of sending uplink HARQ feedback.
  • the fifth indication information is also used to instruct the second communication device to report its remaining memory after a third duration of receiving downlink data.
  • This third duration can be a preset value, referred to as a time interval.
  • the fifth indication information includes information #6, which instructs the second communication device to report its current remaining memory to the first communication device after the third duration of each time it receives downlink data.
  • the first communication device can indicate the size limit of the circular buffer based on the memory availability reported by the second communication device. That is, when the first communication device indicates the size limit of the circular buffer of the second communication device, it takes into account the memory availability of the second communication device. This enables the first communication device to quickly respond to the problem of insufficient memory of the second communication device, reduce the risk that the second communication device cannot decode correctly due to insufficient memory, and improve transmission performance.
  • the methods and operations implemented by devices can also be implemented by components (such as chips or circuits) that can be used in the devices.
  • the communication method provided in the embodiments of this application has been described in detail above with reference to Figure 3.
  • the above communication method is mainly described from the perspective of the interaction between the first communication device and the second communication device. It can be understood that, in order to realize the above functions, the first communication device and the second communication device include hardware structures and/or software modules corresponding to the execution of each function.
  • this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
  • This application embodiment can divide the first communication device and the second communication device into functional modules according to the above method example.
  • each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module.
  • the integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the division of functional modules according to each function as an example.
  • FIG. 4 is a schematic block diagram of a communication device 10 provided in an embodiment of this application.
  • the device 10 includes a transceiver module 11 and a processing module 12.
  • the transceiver module 11 can implement corresponding communication functions, and the processing module 12 is used for data processing. In other words, the transceiver module 11 is used to perform receiving and sending related operations, and the processing module 12 is used to perform other operations besides receiving and sending.
  • the transceiver module 11 can also be referred to as a communication interface or a communication unit.
  • the transceiver module 11 may include a receiving module and/or a sending module, whereby the receiving module performs receiving-related operations and the sending module performs sending-related operations.
  • the device 10 may further include a storage module 13, which can be used to store instructions and/or data.
  • the processing module 12 can read the instructions and/or data in the storage module so that the device can perform the operation of the device in the aforementioned method embodiments.
  • the above modules may also be referred to as units, such as transceiver unit, processing unit, storage unit, etc.
  • the device 10 may correspond to the first communication device in the above method embodiments, or to a component of the first communication device (such as a chip).
  • the device 10 can implement the steps or processes corresponding to those performed by the first communication device in the above method embodiments.
  • the transceiver module 11 can be used to perform the transceiver-related operations of the first communication device in the above method embodiments
  • the processing module 12 can be used to perform the processing-related operations of the first communication device in the above method embodiments.
  • the transceiver module 11 is configured to receive first indication information from the second communication device, the first indication indicating the remaining memory of the second communication device.
  • the transceiver module 11 is further configured to send second indication information to the second communication device based on the remaining memory, the second indication information indicating the size limit of the circular buffer of the second communication device.
  • the transceiver module 11 can be used to execute the steps of sending and receiving information in the method, such as steps S302, S304, S310, and S320; the processing module 12 can be used to execute the processing steps in the method.
  • the device 10 may correspond to the second communication device in the above method embodiment, or to a component of the second communication device (such as a chip).
  • the device 10 can implement the steps or processes corresponding to those performed by the second communication device in the above method embodiments.
  • the transceiver module 11 can be used to perform transceiver-related operations of the second communication device in the above method embodiments
  • the processing module 12 can be used to perform processing-related operations of the second communication device in the above method embodiments.
  • transceiver module 11 is configured to send first indication information to the first communication device, the first indication information indicating the remaining memory. Transceiver module 11 is also configured to receive second indication information from the first communication device, the second indication information indicating the size limit of the circular buffer of the first communication device, the second indication information being determined based on the remaining memory.
  • the transceiver module 11 can be used to execute the steps of sending and receiving information in the method, such as steps S302, S304, S310, and S320; the processing module 12 can be used to execute the processing steps in the method, such as steps S303, S301, and S330.
  • module here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and/or other suitable components supporting the described functions.
  • ASIC application-specific integrated circuit
  • processor e.g., a shared processor, a proprietary processor, or a group processor, etc.
  • memory for executing one or more software or firmware programs, integrated logic circuitry, and/or other suitable components supporting the described functions.
  • the device 10 may specifically be a mobility management network element in the above embodiments, and may be used to execute the various processes and/or steps corresponding to the mobility management network element in the above method embodiments; or, the device 10 may specifically be a terminal device in the above embodiments, and may be used to execute the various processes and/or steps corresponding to the terminal device in the above method embodiments. To avoid repetition, further details are omitted here.
  • the apparatus 10 of each of the above-described schemes has the function of implementing the corresponding steps performed by the devices (such as the first communication device and the second communication device) in the above-described methods.
  • This function can be implemented by hardware or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-described functions; for example, the transceiver module can be replaced by a transceiver (for example, the transmitting unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as processing modules, can be replaced by processors, which respectively execute the transceiver operations and related processing operations in each method embodiment.
  • the transceiver module 11 can also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing module can be a processing circuit.
  • FIG. 5 is a schematic diagram of another communication device 20 provided in an embodiment of this application.
  • the device 20 includes a processor 21, which is used to execute computer programs or instructions stored in a memory 22, or to read data/signaling stored in the memory 22, to perform the methods in the above-described method embodiments.
  • a processor 21 which is used to execute computer programs or instructions stored in a memory 22, or to read data/signaling stored in the memory 22, to perform the methods in the above-described method embodiments.
  • the device 20 further includes a memory 22 for storing computer programs or instructions and/or data.
  • the memory 22 may be integrated with the processor 21 or may be separately configured.
  • the device 20 further includes a transceiver 23, which is used for receiving and/or transmitting signals.
  • the processor 21 is used to control the transceiver 23 to receive and/or transmit signals.
  • the transceiver 23 may include a receiver and/or a transmitter, the receiver being used for receiving signals and the transmitter for transmitting signals; if the communication device 20 is a chip, then the transceiver 23 is the chip's input/output interface, where the output corresponds to transmitting and the input corresponds to receiving.
  • the device 20 is used to implement the operations performed by the first communication device or the second communication device in the various method embodiments described above.
  • processors mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSPs digital signal processors
  • ASICs application-specific integrated circuits
  • FPGAs field-programmable gate arrays
  • a general-purpose processor can be a microprocessor or any conventional processor.
  • Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory.
  • Volatile memory can be random access memory (RAM).
  • RAM can be used as an external cache.
  • RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous linked dynamic random access memory
  • DR RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.
  • FIG. 6 is a schematic diagram of a chip system 30 provided in an embodiment of this application.
  • the chip system 30 (or may also be called a processing system) includes logic circuits 31 and input/output interfaces 32.
  • the logic circuit 31 can be a processing circuit in the chip system 30.
  • the logic circuit 31 can be coupled to a memory unit, calling instructions from the memory unit, enabling the chip system 30 to implement the methods and functions of the embodiments of this application.
  • the input/output interface 32 can be an input/output circuit in the chip system 30, outputting processed information from the chip system 30, or inputting data or signaling information to be processed into the chip system 30 for processing.
  • the chip system 30 is used to implement the operations performed by the terminal device or network device in the various method embodiments described above.
  • logic circuit 31 is used to implement the processing-related operations performed by the terminal device in the above method embodiments
  • input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the terminal device in the above method embodiments.
  • This application also provides a computer-readable storage medium storing computer instructions for implementing the methods executed by the device in the above-described method embodiments.
  • the computer program when executed by a computer, it enables the computer to implement the methods executed by the first communication device or the second communication device in the various embodiments of the above methods.
  • This application also provides a computer program product comprising instructions which, when executed by a computer, implement the methods performed by the first communication device or the second communication device in the above-described method embodiments.
  • This application also provides a communication system, including the aforementioned first communication device and second communication device.
  • the disclosed apparatus and methods can be implemented in other ways.
  • the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.
  • implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof.
  • software When implemented using software, it can be implemented entirely or partially in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer can be a personal computer, a server, or a network device, etc.
  • the computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another.
  • the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media.
  • the available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).
  • the aforementioned available media include, but are not limited to, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, and other media capable of storing program code.

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Abstract

一种通信方法，包括：第一通信设备接收来自第二通信设备的用于指示所述第二通信设备的内存余量的第一指示信息，并根据内存余量向第二通信设备发送第二指示信息，第二指示信息用于指示第二通信设备的循环缓冲区的大小限制情况。即第一通信设备指示第二通信设备的循环缓冲区的大小限制情况时，参考了第二通信设备的内存余量，能够快速响应第二通信设备内存不足的问题，降低第二通信设备因内存不足无法译码正确的风险，提升传输性能。

Description

通信方法和通信装置
本申请要求于2024年08月2日提交中国专利局、申请号为202411063646.4、申请名称为“通信方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，并且更具体地，涉及一种通信方法和通信装置。
背景技术
无线通信系统的演变过程中，高吞吐和大规模连接一直是无线通信网络的核心挑战。在第五代(5th generation，5G)或新无线(new radio，NR)系统以及未来通信系统中，能够显著提高系统容量的大规模(Massive)多输入多输出(multi-input multi-output，MIMO)技术仍然将作为一项关键技术，来满足高速率的传输需求。
针对大规模MIMO场景，随着终端设备和网络设备之间传输的流数和带宽增加，终端设备和网络设备之间传输的码字数目也会相应增加，此时对应的最大混合自动重传请求(hybrid automatic repeat request，HARQ)进程数也会增加，无论是上行还是下行，终端设备的循环缓冲区占用的内存会越来越大。
目前NR通信协议中，可以通过在无线资源控制(radio resource control，RRC)消息中配置有限缓存速率匹配(limited buffer rate matching，LBRM)参数ILBRM用以表示循环缓冲区的大小限制。但是该循环缓冲区大小限制的方式灵活度低，难以适应大规模MIMO传输场景下终端设备内存余量的快速变化的场景。
发明内容
本申请提供一种通信方法，以期提高缓冲区大小限制指示的灵活性。
第一方面，提供了一种通信方法。该方法可以由第一通信设备执行，在并不特殊说明的情况下，本申请中的“第一通信设备”既可以指第一通信设备本身(例如，网络设备)，也可以是第一通信设备中的组件(例如，处理器、芯片、或芯片系统等，如，网络设备中负责通信功能的电路或芯片(如调制解调(Modem)芯片，又称基带(baseband)芯片，或包含modem核的片上系统(system on chip,SoC)芯片或系统级封装(system in package，SIP)芯片))，或者也可以是能实现全部或部分第一通信设备功能的逻辑模块或软件。为了便于描述，下文中以第一通信设备执行为例进行说明。
该通信方法包括：接收来自第二通信设备的第一指示信息，所述第一指示用于指示所述第二通信设备的内存余量；根据所述内存余量向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备的循环缓冲区的大小限制情况。
基于上述技术方案，第一通信设备可以根据第二通信设备上报的内存余量，进行循环缓冲区的大小限制的指示，即第一通信设备指示第二通信设备的循环缓冲区的大小限制情况时，参考了第二通信设备的内存余量，能够快速响应第二通信设备内存不足的问题，降低第二通信设备因内存不足无法译码正确的风险，提升传输性能。
结合第一方面，在第一方面的某些实现方式中，在所述接收来自第二通信设备的第一指示信息之前，所述方法还包括：向所述第二通信设备发送第三指示信息，所述第三指示信息用于指示上报所述内存余量；或者，向所述第二通信设备发送第四指示信息，所述第四指示信息用于指示在满足第一条件的情况下，上报所述内存余量，其中，所述第一条件用于确定是否上报所述内存余量。
基于上述技术方案，第一通信设备可以指示第二通信设备进行内存余量上报，或者也可以指示第二通信设备在满足一定条件的情况下进行内存余量上报，提供了不同的触发第二通信设备上报内存余量的方式，从而提高方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，所述第一条件包括以下至少一项：所述第二通信设备的收发天线数大于第一阈值、所述第二通信设备的信道的最大秩Rank数大于第二阈值、所述第二通信设备调度的流数大于第三阈值、所述第二通信设备的循环缓冲区码字数目大于第四阈值、所述第二通信设备的通信带宽大于第五阈值、所述第二通信设备传输的数据的调制阶数大于第六阈值、所述第二通信设备传输的数据的重传反馈时延大于第七阈值、所述第二通信设备的内存总量小于第八阈值、或所述第二通信设备其他功能占用内存大小大于第九阈值，其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。
基于上述技术方案，第二通信设备自行判断是否上报内存余量的情况下，第二通信设备可以根据不同的条件进行判断，例如，可以是根据自身的收发天线数目、数据流数或者自身循环缓冲区码字数目等，为第二通信设备自行判断提供了不同的条件支持。
结合第一方面，在第一方面的某些实现方式中，所述第一指示信息用于指示所述内存余量，包括以下至少一项：所述第一指示信息指示所述内存余量是否充足；或者，所述第一指示信息指示所述内存余量的大小；或者，所述第一指示信息指示所述内存余量与传输数据所需的内存大小的比值。
基于上述技术方案，第一指示信息指示内存余量的方式可以是粗略指示内存余量是否充足，或者还可以是准确指示内存余量的大小，或者是指示内存余量与相对于当前数据传输所需的内存大小的比例，可以理解为第一指示信息指示内存余量的方式可以有多种，能够让第二通信设备获知第一通信设备的内存余量情况即可。
结合第一方面，在第一方面的某些实现方式中，所述接收来自第二通信设备的第一指示信息，包括：接收来自第二通信设备的上行控制信息(uplink control information，UCI)，所述上行控制信息中包括所述第一指示信息。
结合第一方面，在第一方面的某些实现方式中，所述向所述第二通信设备发送第二指示信息，包括：向所述第二通信设备发送下行控制信息(downlink control information，DCI)，所述下行控制信息中包括所述第二指示信息。
基于上述技术方案，目前NR通信协议中RRC中的静态LBRM参数的配置，置于DCI中的动态LBRM指示更加灵活。
结合第一方面，在第一方面的某些实现方式中，所述第二指示信息指示以下信息中的至少一项：传输数据的调制阶数、码字的码率、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目。
基于上述技术方案，第一通信设备可以通过第二指示信息指示传输数据的调制阶数、传输数据的流数、传输数据的传输带宽、码字的码率、或传输数据的HARQ进程数目中的至少一种，以使得第二通信设备可以根据第二指示信息的指示进行内存操作，从而限制缓冲区大小。示例性地，第二指示信息可以指示不同的参数，协助第二通信设备进行内存操作，提高方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，在所述第一指示信息指示所述内存余量不足以支持所述第一通信设备的循环缓冲区的HARQ进程数目情况下，所述第二指示信息指示限制最大的HARQ进程数目、提升所述码字的码率、降低传输数据的调制阶数、降低传输数据的流数、或降低传输数据的传输带宽中的至少一项。
基于上述技术方案，在第二通信设备通过第一指示信息反馈内存余量不足以支持第一通信设备的循环缓冲区的HARQ进程数目的情况下，第一通信设备可以通过第二指示信息指示限制传输数据的最大的HARQ进程数目、提升码字的码率、降低传输数据的调制阶数、降低传输数据的流数、或降低传输数据的传输带宽中的至少一项，以使得第二通信设备可以根据第二指示信息进行内存操作，例如，对接收到的码字进行合并，降低内存；还例如，调整最大HARQ进程数；又例如，清空不再使用的HARQ进程等，降低第二通信设备因内存不足无法译码正确的风险，提升传输性能。
结合第一方面，在第一方面的某些实现方式中，所述第二指示信息占用一个比特，所述比特值用于指示使用限制使用所述循环缓存区或者不限制使用所述循环缓存区；或者，所述第二指示信息占用多个比特，所述比特的不同取值用于指示不同的传输数据的调制阶数、码字的码率、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目中的至少一项。
基于上述技术方案，第一通信设备所发送的LBRM指示的内容可以是基于目前LBRM指示的1比特设计，通过比特值指示不使用或者使用有限缓冲区。或者，第一通信设备所发送的LBRM指示的内容也可以是多比特示，代表不同级别的码字的码率、调制阶数、流数、传输带宽、或最大HARQ进程数目限制等。
第二方面，提供了一种通信方法。该方法可以由第二通信设备执行，在并不特殊说明的情况下，本申请中的“第二通信设备”既可以指第二通信设备本身(例如，终端设备)，也可以是第二通信设备中的组件(例如，处理器、芯片、或芯片系统等，如，终端设备中负责通信功能的电路或芯片(如Modem芯片，又称基带芯片，或包含modem核的SoC芯片或SIP芯片))，或者也可以是能实现全部或部分第二通信设备功能的逻辑模块或软件。为了便于描述，下文中以第二通信设备执行为例进行说明。
该通信方法包括：向第一通信设备发送第一指示信息，所述第一指示信息用于指示所述内存余量；接收来自所述第一通信设备的第二指示信息，所述第二指示信息用于指示所述第一通信设备的循环缓冲区的大小限制情况，所述第二指示信息基于所述内存余量确定。
结合第二方面，在第二方面的某些实现方式中，在所述第二通信设备的确定内存余量之前，所述方法还包括：接收来自所述第一通信设备的第三指示信息，所述第三指示信息用于指示上报所述内存余量；或者，确定满足第一条件，所述第一条件用于确定是否上报所述内存余量。
结合第二方面，在第二方面的某些实现方式中，所述第一条件包括以下至少一项：所述第二通信设备的收发天线数大于第一阈值、所述第二通信设备的信道的最大秩Rank数大于第二阈值、所述第二通信设备调度的流数大于第三阈值、所述第二通信设备的循环缓冲区码字数目大于第四阈值、或所述第二通信设备的通信带宽大于第五阈值、所述第二通信设备传输的数据的调制阶数大于第六阈值、所述第二通信设备传输的数据的重传反馈时延大于第七阈值、所述第二通信设备的内存总量小于第八阈值、或所述第二通信设备其他功能占用内存大小大于第九阈值，其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：接收来自所述第一通信设备的第四指示信息，所述第四指示信息用于指示在满足所述第一条件的情况下，上报所述内存余量。
结合第二方面，在第二方面的某些实现方式中，所述第一指示信息用于指示所述内存余量，包括以下至少一项：所述第一指示信息指示所述内存余量是否充足；或者，所述第一指示信息指示所述内存余量的大小；或者，所述第一指示信息指示所述内存余量与传输数据所需的内存大小的比值。
结合第二方面，在第二方面的某些实现方式中，所述确定所述第一通信设备的内存余量，包括：根据上行数据对应的以下参数中的至少一项确定内存余量：带宽、码字数目、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、所述第二通信设备的内存总量、所述第二通信设备其他功能占用内存大小；或者，根据下行数据对应的以下参数中的至少一项确定内存余量：带宽、码字数目、译码结果、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、所述第二通信设备的内存总量、所述第二通信设备其他功能占用内存大小，其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。
结合第二方面，在第二方面的某些实现方式中，所述向所述第一通信设备发送所述第一指示信息，包括：向所述第一通信设备发送上行控制信息UCI，所述上行控制信息中包括所述第一指示信息。
结合第二方面，在第二方面的某些实现方式中，所述接收来自所述第一通信设备的第二指示信息，包括：接收来自所述第一通信设备的下行控制信息DCI，所述下行控制信息中包括所述第二指示信息。
结合第二方面，在第二方面的某些实现方式中，所述第二指示信息指示以下信息中的至少一项：码字的码率、传输数据的调制阶数、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目。
结合第二方面，在第二方面的某些实现方式中，在所述第一指示信息指示所述内存余量不足以支持所述第一通信设备的循环缓冲区的HARQ进程数目情况下，所述第二指示信息指示限制传输数据的最大的HARQ进程数目、提升所述码字的码率、降低传输数据的调制阶数、降低传输数据的流数、或降低传输数据的传输带宽中的至少一项。
结合第二方面，在第二方面的某些实现方式中，所述第二指示信息占用一个比特，所述比特值用于指示限制使用所述循环缓存区或者不限制使用所述循环缓存区；或者，所述第二指示信息占用多个比特，所述比特的不同取值用于指示不同的传输数据的调制阶数、码字的码率、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目中的至少一项。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二通信设备根据所述第二指示信息对接收到的码字进行处理、对编码后的码字进行处理、或调整最大混合自动重传请求HARQ进程数，其中，所述对接收到的码字进行处理包括基于码字的码率对接收到的码字进行合并处理，所述对编码后的码字进行处理包括基于码字的码率对编码后的码字进行截断处理。
以上第二方面及其可能的设计所示方法的技术效果可参照第一方面及其可能的设计中的技术效果。
第三方面，提供了一种通信装置。通信装置用于执行上述第一方面及其任意一种实施方式。具体地，通信装置包括处理器和存储器，该存储器用于存储计算机程序；该处理器用于从存储器中调用并运行该计算机程序，使得通信装置执行上述第一方面及其任意一种实施方式。
在一种实现方式中，该通信装置为网络设备。当该通信装置为网络设备时，收发单元可以是收发器，或，输入/输出接口。处理单元可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该通信装置可以为网络设备中的芯片、芯片系统或电路。此时，收发单元可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元可以是至少一个处理器、处理电路或逻辑电路等。
第四方面，提供了一种通信装置。通信装置用于执行上述第二方面及其任意一种实施方式。具体地，通信装置包括处理器和存储器，该存储器用于存储计算机程序；该处理器用于从存储器中调用并运行该计算机程序，使得该通信装置用执行上述第二方面及其任意一种实施方式。
在一种实现方式中，该通信装置为终端设备。当该通信装置为终端设备时，收发单元可以是收发器，或，输入/输出接口。处理单元可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该通信装置可以为终端设备中的芯片、芯片系统或电路。此时，收发单元可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元可以是至少一个处理器、处理电路或逻辑电路等。
第五方面，提供一种计算机可读存储介质。该计算机可读存储介质存储有计算机程序，当计算机程序被运行时，使得上述第一方面和第二方面的任意一种实现方式的方法被执行。
第六方面，提供一种包含指令的计算机程序产品。当该计算机程序产品被运行时，使得上述第一方面和第二方面的任意一种实现方式提供的方法被执行。
第七方面，提供一种芯片，芯片包括处理器与通信接口，处理器通过通信接口读取指令，执行上述第一方面和第二方面的任意一种实现方式提供的方法。
可选地，作为一种实现方式，芯片还包括存储器，存储器存储有计算机程序或指令，处理器用于执行存储器上存储的计算机程序或指令，当计算机程序或指令被执行时，处理器用于执行上述第一方面和第二方面的任意一种实现方式提供的方法。
第八方面，提供一种通信系统，包括第三方面的通信装置和第四方面的通信装置。
第九方面，提供一种计算机程序。当该计算机程序被运行时，使得上述第一方面和第二方面的任意一种实现方式提供的方法被执行。
附图说明
图1是适用于本申请实施例的无线通信系统的一示意图。
图2是适用于本申请实施例的无线通信系统的另一示意图。
图3是本申请实施例提供的一种通信方法的示意性流程图。
图4为本申请实施例提供的通信装置的示意性框图。
图5为本申请实施例提供另一种通信装置的示意图。
图6为本申请实施例提供一种芯片系统的示意图。
具体实施方式
为便于理解本申请实施例，做出以下几点说明：
(1)在本申请中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
(2)在本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。在本申请的文字描述中，字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a、b和c中的至少一项(个)，可以表示：a，或，b，或，c，或，a和b，或，a和c，或，b和c，或，a、b和c。其中a、b和c分别可以是单个，也可以是多个。
(3)在本申请中，“第一”、“第二”以及各种数字编号指示为了描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的消息等，而不是用于描述特定的顺序或先后次序。应理解，这样描述的对象在适当情况下可以互换，以便能够描述本申请的实施例以外的方案。
(4)在本申请中，“当……时”、“在……的情况下”以及“如果”等描述均指在某种客观情况下设备会做出相应的处理，并非是限定时间，且也不要求设备在实现时一定要有判断的动作，也不意味着存在其它限定。
(5)在本申请中，“指示”或“用于指示”可以包括用于直接指示和用于间接指示。当描述某一指示信息用于指示A时，可以包括该指示信息直接指示A或间接指示A，而并不代表该指示信息中一定携带有A。
本申请实施例涉及的指示方式应理解为涵盖可以使得待指示方获知待指示信息的各种方法。待指示信息可以作为整体一起发送，也可以分成多个子信息分开发送，而且这些子信息的发送周期和/或发送时机可以相同，也可以不同，本申请对例如发送方法不作限定。
本申请实施例中的“指示信息”可以是显式指示，即通过信令直接指示，或者根据信令指示的参数，结合其他规则或结合其他参数或通过推导获得。也可以是隐式指示，即根据规则或关系，或根据其他参数，或推导获得。本申请对此不作具体限定。
(6)在本申请中，“协议”可以是指通信领域的标准协议，例如可以包括第五代(5th generation，5G)协议，新无线(new radio，NR)协议，以及应用于未来的通信系统中的相关协议，本申请对此不作限定。“预定义”可以包括预先定义。例如，协议定义。“预配置”可以通过在设备中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其实现方式不作限定。
(7)在本申请中，“通信”还可以描述为“通信”、“信息传输”、“数据处理”等。“传输”包括“发送”和“接收”。“传输”可以描述为“输出”。
(8)在本申请中，“消息”、“信息”、“信号”或“信息元素(information element，IE)”等可以替换使用，对于消息或信息的名称不做任何限定，能够实现相应功能即可。
“向XX(设备)发送信息”可以理解为该信息的目的端是该设备。可以包括直接或间接地向该设备发送信息。“从XX(设备)接收信息，或者接收来自XX(设备)的信息”可以理解为该信息的源端是该设备，可以包括直接或间接地从该设备接收信息。信息在信息发送的源端和目的端之间可能会被进行必要的处理，例如格式变化等，但目的端可以理解来自源端的有效信息。本申请中类似的表述可以做类似的理解，在此不再赘述。”另外，“发送”也可以理解为芯片接口的“输出”，“接收”也可以理解为芯片接口的“输入”。换言之，“发送”或“接收”可以是在设备之间进行的，例如，网络设备和终端设备之间通过空口分别进行发送或接收，“发送”或“接收”也可以是在设备内进行的，例如，通过总线、走线或接口在设备内的部件之间、模组之间、芯片之间、软件模块或者硬件模块之间发送或接收。
(9)在本申请中，“示例性地”、“比如”等词语用于表示例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例”一词旨在以具体方式呈现概念。本申请实施例中，“的(of)”，“相应的(corresponding，relevant)”、“对应的(corresponding)”和“关联的(associate)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
(10)在本申请中，配置可以是信令配置，例如无线资源控制(radio resource control，RRC)消息，下行控制信息(downlink control information，DCI)，或系统信息块(system information block，SIB)。可选的，信令配置可以是由预配置的信令配置给终端设备，或者，通过预配置的方式配置给终端设备。这里的预配置，是以协议的方式提前定义或配置相应参数的取值，在与终端设备通信之时存入终端设备中。预配置的消息，在终端设备连网的条件下可以修改或更新。
本申请实施例中的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)或新无线(new radio，NR)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统等。本申请提供的技术方案还可以应用于未来的通信系统。本申请提供的技术方案还可以应用于设备到设备(device to device，D2D)通信、车到万物(vehicle-to-everything，V2X)通信、机器到机器(machine to machine，M2M)通信、机器类型通信(machine type communication，MTC)、以及物联网(internet of things，IoT)通信系统。本申请提供的技术方案还可以应用于低频场景、高频场景、太赫兹等。
本申请提供的技术方案还可以应用于星间通信和卫星通信等非陆地通信网络(non-terrestrial network，NTN)系统。作为示例，卫星通信系统包括卫星基站以及终端设备。该卫星基站为终端设备提供通信服务。卫星基站也可以与基站进行通信。卫星可作为基站，也可作为终端设备。其中，卫星可以是指无人机，热气球，低轨卫星，中轨卫星，高轨卫星等。卫星也可以是指非地面基站或非地面设备等。
通信系统中的一个设备可以向另一个设备发送信号或从另一个设备接收信号。其中信号可以包括信息、信令或者数据等。其中，设备也可以被替换为实体、网络实体、网元、通信设备、通信模块、节点、通信节点等等，本申请中以设备为例进行描述。例如，通信系统可以包括至少一个终端设备和至少一个网络设备。网络设备可以向终端设备发送下行信号，和/或终端设备可以向网络设备发送上行信号。
本申请实施例中的终端设备，可以为接入上述通信系统，且具有相应通信功能的设备或模组。终端设备可包括各种具有无线通信功能的设备，其可用于连接人、物、机器等。终端设备内通常设置有执行相应通信功能的通信模组、电路或芯片。终端内还以配置用于执行相应通信功能的程序指令。终端设备可以广泛应用于各种场景，例如：蜂窝通信，D2D，V2X，端到端(peer to peer)，M2M，MTC，IoT，虚拟现实(virtual reality，VR)，增强现实(augmented reality，AR)，工业控制，自动驾驶，远程医疗，智能电网，智能家具，智能办公，智能穿戴，智能交通，智慧城市无人机，机器人，遥感，被动传感，定位，导航与寻迹，自主交付等场景。终端设备可以是上述任一场景下的终端，如MTC终端、IoT终端等。终端设备可以是第三代合作伙伴项目(3rd generation partnership project，3GPP)标准的用户设备(user equipment，UE)、终端(terminal)、固定设备、移动台(mobile station)设备或者说移动设备、用户单元(subscriber unit)、手持设备、车载设备、可穿戴设备、蜂窝电话(cellular phone)、智能电话(smart phone)、会话发起协议(session initiation protocol，SIP)电话、无线数据卡、个人数字助理(personal digital assistant，PDA)、电脑、平板电脑、笔记本电脑、无线调制解调器、手持设备(handset)、膝上型电脑(laptop computer)、具有无线收发功能的计算机、智能书、车辆、卫星、全球定位系统(global positioning system，GPS)设备、目标寻迹设备、飞行器(例如无人机、直升机、多直升机、四直升机、或飞机等)、船只、遥控设备智能家居设备、工业设备、具有无线通信功能的运输载具、通信模组、具有终端功能的路边单元(road side unit，RSU)，或者内置于上述设备中的装置(例如，上述设备中的通信模块、调制解调器或芯片等)，或者连接到无线调制解调器的其它处理设备。为了描述方便，下文将终端设备以终端或UE为例来描述。
应理解，在某些场景下，UE还可以用于充当基站。例如，UE可以充当调度实体，其在V2X、D2D或端到端等场景中的UE之间提供侧行链路信号。
本申请实施例中，用于实现终端设备的功能的装置，即终端装置，可以是终端设备，也可以是能够支持终端设备实现该功能的装置，例如芯片系统或芯片或电路或通信模组(也即执行通信功能的通信模组)，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。此外，该装置内还可配置用于执行相应通信功能的程序指令。
本申请实施例中的网络设备，可以具有相应通信功能的设备或模组。网络设备可以是用于与终端设备通信的设备，该网络设备也可以称为接入网设备或无线接入网设备，如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称，或与如下名称进行替换，比如：节点B(NodeB)、演进型基站(evolved NodeB，eNB)、未来通信网络中的基站(NodeB，gNB)、中继站、接入点、传输点(transmitting and receiving point，TRP)、发射点、主站、辅站、多制式无线(motor slide retainer，MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access point，AP)、传输节点、收发节点、基带单元(baseband unit，BBU)、射频拉远单元(remote radio unit，RRU)、有源天线单元(active antenna unit，AAU)、射频头(remote radio head，RRH)、中心单元(central unit，CU)、分布式单元(distributed unit，DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物，或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及D2D、V2X、M2M通信中承担基站功能的设备、未来网络中的网络侧设备、未来的通信系统中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的，也可以是移动的。例如，直升机或无人机可以被配置成充当移动基站，一个或多个小区可以根据该移动基站的位置移动。在其他示例中，直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中，本申请实施例提及的网络设备可以为包括CU、或DU、或包括CU和DU的设备、或者控制面CU节点(中央单元控制面(central unit-control plane，CU-CP))和用户面CU节点(中央单元用户面(central unit-user plane，CU-UP))以及DU节点的设备。例如，网络设备可以包括gNB-CU-CP、gNB-CU-UP和gNB-DU。
在一些部署中，由多个RAN节点协作协助终端实现无线接入，不同RAN节点分别实现基站的部分功能。例如，RAN节点可以是CU，DU，CU-CP，CU-UP，或者无线单元(radio unit，RU)(或者称射频单元)等。CU和DU可以是单独设置，或者也可以包括在同一个网元中，例如BBU中。RU可以包括在射频设备或者射频单元中，例如包括在RRU、AAU或RRH中。
在一些部署中，CU是承载接入网设备的RRC层、业务数据适配协议(service data adaptation protocol，SDAP)层、分组数据汇聚协议(packet data convergence protocol，PDCP)层和其他控制功能的逻辑节点。CU通过一些接口与核心网等网络节点相连，这些接口可以是E2接口等。可选地，CU具有核心网的部分功能。CU(例如PDCP层和更高层)通过一些接口与DU(例如无线链路控制(radio link control，RLC)层和更下层)相连，这些接口可以是F1接口等。在一些示例中，这些接口(例如F1接口)可以提供控制面(control plane，C-Plane)和用户面(user plane，U-Plane)功能(例如，接口管理、系统信息管理、UE上下文管理、RRC消息传输等)。F1应用协议(F1 application protocol，F1AP)是F1接口的应用协议，在一些示例中定义了F1的信令过程。F1接口支持控制面(F1 control plane，F1-C)，用户面(F1user plane，F1-U)。
在一些部署中，CU可以拆分为CU-CP和CU-UP。其中CU-CP是承载RRC层和PDCP的控制面(control plane part of PDCP，PDCP-C)层的逻辑节点，用于实现CU的控制面功能。CU-CP可以与核心网中用于实现控制面功能的网元交互。核心网中用于实现控制面功能的网元可以是接入和移动性功能网元。CU-UP是承载SDAP层和PDCP的用户面(user plane part of PDCP，PDCP-U)层的逻辑节点，用于实现CU的用户面功能。CU-UP可以与核心网中用于实现用户面功能的网元交互。核心网中用于实现用户面功能的网元。以上CU，DU的配置仅仅是一种举例，也可以根据需要配置CU，DU具有的功能。例如，可以将CU或者DU配置为具有更多协议层的功能，或者将CU或DU配置为具有协议层的部分处理功能。例如，将RLC层的部分功能和RLC层以上的协议层的功能设置在CU，将RLC层的剩余功能和RLC层以下的协议层的功能设置在DU。再例如，可以按照业务类型或者其他系统需求对CU或者DU的功能进行划分，例如按时延划分，将处理时间需要满足较小时延要求的功能设置在DU，不需要满足该时延要求的功能设置在CU。
在一些部署中，DU是承载RLC层、媒体接入控制(medium access control，MAC)层、高物理(higher physical layer，Higher PHY)层和其他功能的逻辑节点。在一些示例中，DU可以控制至少一个RU。DU通过一些接口与RU相连接，这些接口可以是前传接口。在一些示例中，Higher PHY层包括PHY层处理的部分，例如前向纠错(forward error correction，FEC)编码和解码、加扰、调制和解调等处理功能。
在一些部署中，RU是承载低物理层(lower physical layer，Lower PHY)和射频(radio frequency，RF)处理的逻辑节点。在一些示例中，RU可以是TRP或RRH或其他类似功能的实体。在一些示例中，Low-PHY包括PHY处理的部分，如快速傅里叶变换(fast Fourier transform，FFT)、快速傅立叶反变换(inverse fast Fourier transformation，IFFT)、数字波束成形和滤波等处理功能。RU通过无线链路与一个或多个UE进行通信。
DU和RU可以是共址的，也可以不是共址的。DU和RU通过前传链路经由下层分裂-控制、用户和同步(lower-layer split CUS-Plane，LLS-CUS)接口交换控制平面信息和用户平面信息。LLS-CUS可以包括分别提供控制平面和用户平面的接口。在一些示例中，控制平面是指DU和RU之间的实时控制。DU和RU有前传链路的下层分裂管理(lower-layer split management，LLS-M)接口交换管理信息，管理平面(M-Plane)是指DU和RU之间的非实时管理操作。
DU和RU可以合作共同实现PHY层的功能。一个DU可以和一个或多个RU相连。DU和RU所具有的功能可以根据设计被配置为多种方式。例如，DU被配置用于实现基带功能，RU被配置用于实现中射频功能。再例如，DU被配置为用以实现PHY层中的高层功能，RU被配置为实现PHY层中的低层功能或者实现该低层功能和射频功能。物理层中的高层功能可以包括物理层的一部分功能，该部分功能更加靠近MAC层，物理层中的低层功能可以包括物理层的另一部分功能，该部分功能更加靠近中射频侧。
一种可能的设计中，BBU中用于实现基带功能的处理单元称为基带高层(base band high，BBH)单元，RRU/AAU/RRH中用于实现基带功能的处理单元称为基带低层(base band low，BBL)单元。
在不同系统中，CU(包括开放式CU-CP(open CU-CP，O-CU-CP)和开放式CU-UP(open CU-UP，O-CU-UP)、DU或RU也可以有不同的名称，但是本领域的技术人员可以理解其含义。例如，在开放式接入网(open RAN，O-RAN或ORAN)系统中，CU也可以称为开放式集中式单元(open central unit，O-CU)，DU也可以称为开放式分布式单元(open distributed unit，O-DU)，CU-CP也可以称为O-CU-CP，CU-UP也可以称为O-CU-UP，RU也可以称为开放无线单元(open radio unit，O-RU)。为描述方便，本申请中以CU，CU-CP，CU-UP、DU和RU为例进行描述。本申请中的CU(或CU-CP、CU-UP)、DU和RU中的任一单元，可以是通过软件模块、硬件模块、或者软件模块与硬件模块结合来实现。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统或芯片或电路或通信模组(也即执行通信功能的通信模组)，该装置可以被安装在网络设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其它分立器件。此外，该装置内还可配置用于执行相应通信功能的程序指令。在本申请实施例中仅以用于实现网络设备的功能的装置为网络设备为例进行说明，不对本申请实施例的方案构成限定。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。此外，终端设备和网络设备可以是硬件设备，也可以是在专用硬件上运行的软件功能，通用硬件上运行的软件功能，比如，是平台(例如，云平台)上实例化的虚拟化功能，又或者，是包括专用或通用硬件设备和软件功能的实体，本申请对于终端设备和网络设备的具体形态不作限定。
下面将结合附图，对本申请中的技术方案进行描述。
图1是适用于本申请实施例的无线通信系统的一示意图。如图1所示，该无线通信系统包括无线接入网100。无线接入网100可以是未来网络中的(例如更高版本)无线接入网，或传统(例如5G或4G)无线接入网。一个或多个终端设备(120a-120j，统称为120)可以相互连接或连接到无线接入网100中的一个或多个网络设备(110a、110b，统称为110)。无线通信系统中网元之间通过接口(例如NG，Xn)，或空口相连。
上述图1仅是为便于理解给出的示意图，该无线通信系统中还可以包括其它设备，如还可以包括核心网(core network，CN)设备、无线中继设备和/或无线回传设备等，在图1中未画出。
图2是适用于本申请实施例的无线通信系统的另一示意图。如图2所示，该无线通信系统可以包括核心网设备、接入网设备(如RAN)、终端设备，接入网设备通过回传链路(backhaul)与核心网设备通信，通过空口与终端设备通信。举例来说，接入网设备中BBU通过回传链路与核心网通信，接入网设备中的RU通过空口与终端设备通信。BBU可通过前传链路与RU通信，BBU和RU可以是共址的，也可以不是共址的。在一些部署中，BBU包括至少一个CU和至少一个DU，CU和DU之间可通过中传链路(midhaul)进行通信。
上述图2仅是为便于理解给出的示意图，该无线通信系统中还可以包括其它设备，在图2中未画出。
为便于理解本申请的技术方案，对本申请技术方案涉及的一些基本概念进行介绍。
1、多输入多输出(multi-input multi-output，MIMO)技术：无线通信系统经历了从第一代模拟通信到5G NR技术的演变和研究。在这复杂的演变过程中，高吞吐和大连接一直是无线通信网络的核心挑战。在5G NR以及未来通信的多种解决方案中，能够显著提高系统容量的大规模(Massive)MIMO技术仍然将作为一项关键技术，来满足高速率的传输需求。
MIMO技术利用空间维度资源，在不增加系统带宽时，使信号在空间获得阵列增益、复用和分集增益以及干扰抵消增益，成倍地提升通信系统的容量和频谱效率。
2、信道估计：在通信系统中，为了发送和接收数据、获取系统同步和反馈信道信息，估计上行链路信道或下行链路信道较为必要。信道估计指的是为了补偿信道衰落和噪声产生衰落所引起的信号失真而重建或恢复接收信号的过程，利用发送机与接收机预知的基准信号来测量信道的时域和频域变化。
上述基准信号又可以称为导频信号或者参考信号(reference signal，RS)，基准信号在正交频分多路复用技术(orthogonal frequency division multiplexing，OFDM)符号内分布于不同的资源单元(resource element，RE)上，具有已知的幅度和相位。
在MIMO系统中，各根发送天线(虚拟天线或物理天线)具有独立的信道。例如，在上行和下行链路中，为了实现多天线系统的信道质量测量，NR系统定义了多种导频信号，如，信道质量测量参考符号(channel state information-reference signal，CSI-RS)、探测参考信号(demodulation reference signal，DMRS)以及解调参考信号(sounding reference signal，SRS)等。其中，DMRS用于辅助物理下行共享信道(physical downlink share channel，PDSCH)的解调；CSI-RS用于物理天线端口对应的下行信道测量，接收机针对基站发送的每个天线端口进行信道估计，并利用估计结果进行信道状态信息(channel state information，CSI)反馈，CSI包括信道质量指示(channel quality indicator，CQI)、预编码指示(precoding matrix indicator，PMI)、层指示(layer indicator，LI)、或秩指示(rank indicator，RI)等相关信息。而在上行信道测量过程中，基站通过接收的SRS估计上行链路信道，并可以基于该信息，执行频率选择资源调度、功率控制、定时估计与调制、编码方案阶数选择、以及TDD中下行预编码生成等。
3、循环缓冲区(circular buffer)：在上行传输过程中，终端设备为确保上行传输的码字能被基站译码成功，在基站反馈传输成功的确认(acknowledgement，ACK)信号前，不会清空该码字的循环缓冲区。
在下行传输过程中，当终端设备译码失败时，会给基站反馈译码失败的ACK信号。为确保下行传输的码字能译码成功，终端设备在该码字的信息译码成功前，也不会清空该码字的循环缓冲区，并且会不断叠加接收到的重传信息，直至译码成功或达到最大重传次数。
4、混合自动重传请求(hybrid automatic repeat request，HARQ)进程：是指采用HARQ技术的数据传输进程，在LTE和NR系统中，为了提高数据传输可靠性，可以在数据传输时使用HARQ技术。
在HARQ技术中，数据的接收端可以通过循环冗余校验(cyclic redundancy check,CRC)来检测接收到的数据包是否出错，在接收到错误的数据包后，接收端会保留该数据包并向数据的发送端发送重传请求,发送端重新发送数据包后，接收端会将错误的数据包与重传的数据包合并在一起进行译码，从而可以提高译码成功率，对于一个HARQ进程，在数据传输的接收端存在独立的HARQ缓存(buffer)，用于保存错误的数据包，以便于将其与后续接收到的重传数据包进行合并。
以终端设备与接入网设备间的上行传输为例，用于上行数据传输的一个物理上行共享信道(physical uplink shared channel，PUSCH)对应于一个HARQ进程号，唯一地指定一个HARQ进程。当接入网设备接收的数据出现错误，进行重传调度时，可以通过HARQ进程号来指示终端设备是承载于哪个PUSCH的数据出现了错误，需要重传，从而便于终端设备对相应的数据进行重传，终端设备可以使用相同HARQ进程号的PUSCH进行重传，如此，接入网设备可以将存储在相应的HARQ缓存中的数据与重传的数据进行合并，称这一过程为软合并。
5、码字：可以为经过编码(例如包括信道编码)的编码比特。码字经过加扰(scrambling)，生成加扰比特。
6、有限缓存速率匹配(limited buffer rate matching，LBRM)参数：记为ILBRM参数，用于最低码率的限制，并进行码字截断。NR通信协议中，在RRC中会配置一个ILBRM参数，用以表示循环缓冲区的大小限制。
示例性地，对于上行传输：上行共享信道HARQ的缓冲区大小Ncb受LBRM是否使能影响。当ILBRM参数＝0时，即非受限缓冲区时Ncb＝N；当ILBRM参数＝0时，即受限缓冲区时，Ncb＝min(N，Nref)。
示例性地，对于下行传输默认设置ILBRM参数＝1，表示要使用受限缓冲区。
具体地，NR通信协议中，网络设备可以根据带宽、调制、流数、最高码率等参数计算传输块(transmission block，TB)大小，例如，实际最大传输的信息比特(bit)数目＝激活带宽的资源元素(resource element，RE)数目*每个RE里调制的bit数目*流数*最高码率。
进一步地，网络设备再根据传输块数目和“由ILBRM确定的新码率RLBRM”计算最大码块大小Nref，也即最大码块大小＝实际最大传输的信息比特数目除以码块数目除以RLBRM，码块数目是C。比较最大码块大小和当前编码后的码块大小。当ILBRM参数＝0时，直接用当前码块大小。当ILBRM参数＝1时，对上述两者取小(min)，得到的才是真正的码块大小。
上文结合图1和图2简单介绍了本申请实施例提供的通信方法能够应用的场景，以及介绍了本申请实施例中可能涉及到的基本概念，并在基本概念中介绍了MIMO技术以及ILBRM参数的设置方式，针对大规模MIMO场景，随着传输的流数和带宽增加，传输的码字数目也会相应增加，此时对应的最大HARQ进程数也会增加，此时无论是上行还是下行，终端设备的循环缓冲区占用的内存会越来越大，可能出现终端设备空余内存不足以支持循环缓冲区大小的情形。终端设备内存余量是随着Rank数变化、带宽变化、终端设备其他业务的内存使用情况而快速变化的，上述的基于RRC配置的ILBRM参数指示不够灵活，难以适应大规模MIMO高吞吐传输场景下终端设备内存余量的快速变化的场景，会出现终端设备内存余量不够无法进行HARQ重传(或终端设备内存冗余)的情况，会影响传输性能。
为了解决上述的ILBRM参数指示存在的问题，本申请提供一种通信方法，以期提高缓冲区大小限制指示的灵活性，保证传输性能。
本申请实施例提供的通信方法可以应用于通过多天线技术通信的系统，例如，图1中所示的通信系统100。该通信系统可以包括至少一个网络设备和至少一个终端设备。
下文示出的实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可。例如，本申请实施例提供的方法可以由第一通信设备执行，在并不特殊说明的情况下，本申请中的“第一通信设备”既可以指第一通信设备本身(例如，网络设备)，也可以是第一通信设备中的组件(例如，处理器、芯片、或芯片系统等)，或者也可以是能实现全部或部分第一通信设备功能的逻辑模块或软件。还例如，本申请实施例提供的方法可以由第二通信设备执行，在并不特殊说明的情况下，本申请中的“第二通信设备”既可以指第二通信设备本身(例如，终端设备)，也可以是第二通信设备中的组件(例如，处理器、芯片、或芯片系统等)，或者也可以是能实现全部或部分第二通信设备功能的逻辑模块或软件。
图3是本申请实施例提供的一种通信方法的示意性流程图，包括以下步骤：
S310，第一通信设备接收来自第二通信设备的第一指示信息，相应的，第二通信设备向第一通信设备发送第一指示信息。
示例性地，第二通信设备可以通过上行控制信息(uplink control information，UCI)向第一通信设备发送第一指示信息。例如，第二通信设备向第一通信设备发送UCI，UCI中包括第一指示信息，或者，UCI为上述的第一指示信息。
具体地，第一指示信息用于指示第二通信设备的内存余量的状况。该内存余量用于支持第一通信设备的循环缓冲区码字的存储。例如，在第一通信设备的内存余量不足以支持第一通信设备的循环缓冲区大小的情况下，可能会出现无法进行HARQ重传，会影响传输性能。
可选地，第一指示信息用于指示第二通信设备的内存余量的状况包括但不限于以下几种可能的方式：
方式1.1：第一指示信息指示内存余量是否充足。
如，第一指示信息占1比特，当第一指示信息的比特值取0时，表示内存余量不足，当第一指示信息的比特值取1时，表示内存余量充足。
方式1.2：第一指示信息指示内存余量的大小。
如，第一指示信息占至少一个比特，该至少一个比特的取值能够精确表示第一通信设备当前的内存余量。作为示例而非限定，第一指示信息可以指示索引，不同的索引对应的内存余量值不同。
方式1.3：第一指示信息指示内存余量与传输数据所需的内存大小的比值。其中，传输数据可以是第二通信设备接收下行数据或者可以是第二通信设备发送上行数据。
应理解，上述的方式1.1至1.3仅为示例，对本申请的保护范围不构成任何的限定，第一指示信息还可以通过其他指示方式指示内存余量的状况，例如，第一指示信息指示当前内存余量和上一次上报的内存余量的差值等，这里不再一一举例说明。
可选地，第一通信设备通过第一指示信息上报内存余量的方式可以由第二通信设备配置，例如，第二通信设备通过第三指示信息指示第一通信设备上报内存余量的情况下，还可以指示第一通信设备上报内存余量的方式。
如，第三指示信息中包括信息#1，信息#1用于指示第一通信设备上报内存余量是否充足；还如，第三指示信息中包括信息#2，信息#2用于指示第一通信设备上报内存余量的大小；又如，第三指示信息中包括信息#3，信息#3用于指示第一通信设备上报内存余量与传输数据所需的内存大小的比值等等。
需要说明的是，上述的信息#1、信息#2、或信息#3中的至少一项可以不携带在第三指示信息中，例如，第一通信设备可以通过第三指示信息之外的其他的信息指示第二通信设备上报内存余量的具体方式。
本申请中，第二通信设备在发送第一指示信息之前，确定第二通信设备的内存余量，则图3所示的方法流程还包括：
S301，第二通信设备确定第二通信设备的内存余量。
作为一种可能的实现方式，对于上行传输。第二通信设备可以根据当前传输的上行数据对应的以下参数中的至少一项确定当前的内存余量：
带宽、码字数目、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、该第二通信设备的内存总量、或第二通信设备自身当前其他功能占用内存大小等确定当前的内存余量。
例如，第二通信设备可以在向第一通信设备发送上行数据之后，确定当前的内存余量；还例如，第二通信设备可以在向第一通信设备发送上行数据之前，确定当前的内存余量。
在该实现方式下，该通信方法还可以包括：第二通信设备向第一通信设备发送上行数据，例如，第二通信设备向第一通信设备发送PUSCH。可选地，第一通信设备可以向第二通信设备发送HARQ反馈，其中，上行HARQ反馈可以参考目前相关技术中上行HARQ反馈的描述，这里不进行详细说明。
应理解，上述的第二通信设备根据当前传输的上行数据的相关参数确定当前的内存余量的方式仅为示例，对本申请的保护范围不构成任何的限定，在上行传输的场景下，还可以通过其他方式确定内存余量，例如，根据上行传输过程中相关的历史数据的传输情况确定内存余量等，这里不再一一举例说明。
为了便于理解，下面结合具体的示例简单介绍对于上行传输，第二通信设备确定当前的内存余量的方式。
示例一：
首先，第二通信设备计算一定带宽、一段时间内传输的上行数据的大小，即上行数据占用内存大小。
其次，第二通信设备确定自身当前其他功能占用内存大小。
然后，计算内存余量，如，内存余量＝第二通信设备的总内存-上行数据占用内存大小-其他功能占用内存大小。
示例性地，第二通信设备计算上行数据占用内存大小可以是基于一定带宽、一段时间内上行数据的流数、传输带宽、载波间隔、调制阶数等参数计算上行数据占用内存，例如，上行数据占用内存大小＝流数*频域传输带宽/载波间隔*每个RE调制前对应的bit数*发出信号到重传反馈的时间长度所对应的符号数目/8，其中，发出信号到重传反馈的时间长度所对应的符号数目/8是为了从比特折算到字节(Byte)。如，100msHARQ反馈时延20流500MHz带宽在1024正交调幅(quadrature amplitude modulation，QAM)调制下的上行数据占用内存大小为：20*500MHz/30kHz*10bit/8*14*200＝1.17e9Byte＝1.1GB。
示例性地，第二通信设备计算上行数据占用内存大小可以是基于上行数据的流数、每个码字对应的流数、码字大小、码字数目等参数计算上行数据占用内存，例如，上行数据占用内存大小＝码字的大小(bit数)*码字数目*每个码字对应的流数*流数。
作为另一种可能的实现方式，对于下行传输。第二通信设备可以根据当前接收到的下行数据对应的以下参数中的至少一项确定当前的内存余量：
带宽、码字数目、下行数据的译码结果、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、该第二通信设备的内存总量、或第二通信设备自身当前其他功能占用内存大小等。
在该实现方式下，该通信方法还可以包括：第一通信设备向第二通信设备发送下行数据，例如，第二通信设备向第一通信设备发送PDSCH。另外，第二通信设备接收到下行数据之后，可以进行数据译码。可选地，第二通信设备可以向第一通信设备发送HARQ反馈，其中，下行HARQ反馈可以参考目前相关技术中下行HARQ反馈的描述，这里不进行详细说明。
应理解，上述的第二通信设备根据当前传输的下行数据的相关参数确定当前的内存余量的方式仅为示例，对本申请的保护范围不构成任何的限定，在下行传输的场景下，还可以通过其他方式确定内存余量，这里不再一一举例说明。
为了便于理解，下面结合具体的示例简单介绍对于下行传输，第二通信设备确定当前的内存余量的方式。
示例二：
首先，第二通信设备计算一定带宽、一段时间内传输的下行数据的大小，即下行数据占用内存大小。
其次，第二通信设备确定自身当前其他功能占用内存大小。
然后，计算内存余量，如，内存余量＝第二通信设备的总内存-下行数据占用内存大小-其他功能占用内存大小。
示例性地，第二通信设备计算下行数据占用内存大小可以是基于一定带宽、一段时间内上行数据的流数、传输带宽、载波间隔、调制阶数等参数计算上行数据占用内存，例如，下行数据占用内存大小＝流数*频域传输带宽/载波间隔*每个RE调制前对应的bit数*发出信号到重传反馈的时间长度所对应的符号数目/8。如，100msHARQ反馈时延20流500MHz带宽在1024QAM调制下的下行数据占用内存大小为：20*500MHz/30kHz*10bit/8*14*200＝1.17e9 Byte＝1.1GB。
示例性地，第二通信设备计算下行数据占用内存大小可以是基于下行数据的流数、每个码字对应的流数、码字大小、码字数目等参数计算上行数据占用内存，例如，下行数据占用内存大小＝码字的大小(bit数)*码字数目*每个码字对应的流数*流数。
应理解，上述的实现方式仅为示例，对本申请的保护范围不构成任何的限定，第二通信设备还可以通过其他方式确定当前的内存余量。例如，第二通信设备根据历史通信数据确定当前的内存余量；还例如，第二通信设备根据管理设备(如，操作维护管理(operation administration and maintenance，OAM))的指示确定当前内存余量等等，这里不再一一举例说明。
具体地，第一通信设备接收到上述的第一指示信息之后，可以基于该第一指示信息确定第二通信设备当前的内存余量，并根据第二通信设备当前的内存余量向第二通信设备发送第二指示信息(如，ILBRM)，指示第二通信设备进行内存操作，则图3所示的方法流程还包括：
S320，第一通信设备向第二通信设备发送第二指示信息，相应的，第二通信设备接收来自第一通信设备的第二指示信息。
具体地，第二指示信息用于指示第二通信设备的循环缓冲区的大小限制情况。该第二指示信息是基于第二通信设备上报的内存余量确定的。
示例性地，第一通信设备可以通过下行控制信息(downlink control information，DCI)向第二通信设备发送第二指示信息。例如，第一通信设备向第二通信设备发送DCI，DCI中包括第二指示信息，或者，DCI为上述的第二指示信息。
可选地，第二指示信息用于指示以下信息中的一项：
码字的码率、传输数据的调制阶数、传输数据的流数、传输数据的传输带宽、或传输数据的HARQ进程数目等。其中，传输数据可以是第二通信设备接收下行数据或者第二通信设备发送上行数据，例如，传输数据的调制阶数可以是第二通信设备接收的下行数据的调制阶数，或者，第二通信设备发送上行数据的调制阶数。
作为示例而非限定，第一通信设备根据第二通信设备的内存余量和实际最大传输的信息比特(bit)数目，确定内存余量小于实际最大传输的信息比特数目的情况下，可以降低实际传输比特数目，示例性地，可以通过如下方式实现降低实际传输比特数目：
例如，降低传输数据的调制阶数，如传输数据的调制阶段可以进行以下调整：从1024正交调幅(quadrature amplitude modulation，QAM)调整至256QAM；
还例如，降低传输数据的传输带宽，如传输数据的传输带宽可以进行以下调整：从100MHz降低为50MHz；
又例如，降低传输数据的流数，如传输数据的流数可以进行以下调整：从20流降低成10流；
又例如，提升码字的码率，如，传输的信息数目不减少，减少校验位的传输等等。示例性地，第一通信设备根据第二通信设备的内存余量确定码字的码率包括：
第一通信设备根据“内存余量”和“每个HARQ进程占用内存大小*HARQ数目”，确定实际能支撑的HARQ数目，若内存余量小于实际最大传输的信息比特(bit)数目，可以降低实际最大传输的信息比特数，即提升码字的码率，如，传输的信息数据保持不变，减少校验位的传输。可选地，内存余量越少，第一通信设备确定的码字的码率越大。
示例性地，第一通信设备根据第二通信设备的内存余量确定HARQ进程数目包括：
第一通信设备根据“内存余量”和“每个HARQ进程占用内存大小*HARQ数目”，确定实际能支撑的HARQ数目，若内存余量小于实际最大传输的信息比特(bit)数目，可以降低HARQ进程数目。
为了便于理解，下面结合具体的示例说明第二指示信息的指示方式：
示例一：
第二指示信息可以指示不同的循环缓存区限制使用情况，例如，第二指示信息能够指示多个不同的码率(如，可以指示的码率有0.5,0.7,0.8,和0.9，该4种码率可以通过2个比特指示，00指示0.5，01指示0.7，10指示0.8，11指示0.9)。第一通信设备根据内存余量确定当前第二通信设备可以支持的码率为码率#1(如，0.75)，从而第一通信设备可以根据确定的码率#1和第二指示信息可以指示的多种码率确定第二指示信息所指示的码率，如，第二指示信息为10指示码率为0.8。
示例性地，当第二通信设备通过第一指示信息上报的内存余量小于余量阈值的情况下，第一通信设备可以指示第二通信设备调整当前执行的业务，例如，减少、调整、或暂停某些业务。如，指示第二通信设备关闭高精度业务。
可选地，内存余量小于余量阈值可以理解为：第二通信设备的内存余量不足以支持当前循环缓冲区的HARQ进程数目时，第一通信设备可以通过第二指示信息(如，动态LBRM指示)，来限制传输数据的最大HARQ进程数、提升码字的码率、降低传输数据的调制阶数、降低传输数据的流数、或降低传输数据的传输带宽。
示例性地，当第二通信设备通过第一指示信息上报的内存余量表明第二通信设备的内存余量足以支持当前循环缓冲区的HARQ进程数目时，第一通信设备可以通过第二指示信息(如，动态LBRM指示)，来增加传输数据的最大HARQ进程数、降低码字的码率、提升传输数据的调制阶数、提升传输数据的流数、或提升传输数据的传输带宽。
可选地，第二指示信息可以占用一个比特，该一个比特的取值用于指示限制使用所述循环缓存区或者不限制使用所述循环缓存区，其中，限制使用所述循环缓存区可以理解为指示使用有限缓存区，不限制使用所述循环缓存区可以理解为指示不使用有限缓存区。例如，比特的取值为0表示不使用有限缓存区，该比特的取值为1表示使用有限缓存区。即本申请中，第二指示信息指示的内容可以参考目前已有的LBRM指示的1比特设计，通过一个比特指示相应的内容，但是需要说明的是本申请中第二指示信息是基于第二通信设备上报的内存余量确定的，相比于目前已有的LBRM指示考虑了第二通信设备的内存余量，降低第二通信设备因内存不足无法译码正确的风险，提升传输性能。
可选地，第二指示信息可以占用多个比特，该多个比特的不同取值用于指示不同的码字的码率、不同的传输数据的调制阶数、不同的传输数据的流数、不同的传输数据的传输带宽、或不同的传输数据的HARQ进程数目中的至少一项。即多个比特可以更灵活地进行指示，若比特的取值不同，则表示所指示的参数也不同，如，指示码字的码率不同的取值可以通过多个比特的不同取值实现。
例如，第二指示信息占用两个比特，当比特取值为00时，表示码字的码率为码率#1、最大HARQ进程数目为HARQ进程数#1；当比特取值为01时，表示码字的码率为码率#2、最大HARQ进程数目为HARQ进程数#2；当比特取值为10时，表示码字的码率为码率#3、最大HARQ进程数目为HARQ进程数#3；当比特取值为11时，表示码字的码率为码率#4、最大HARQ进程数目为HARQ进程数#4。其中，码率#1小于码率#2，码率#2小于码率#3，码率#3小于码率#4；HARQ进程数#1小于HARQ进程数#2，HARQ进程数#2小于HARQ进程数#3，HARQ进程数#3小于HARQ进程数#4。
进一步地，第二通信设备接收到上述的第二指示信息之后，可以基于第二指示信息进行内存操作，则图3所示的方法流程还包括：
S330，第二通信设备进行内存操作。
作为一种可能的实现方式，对于下行传输，第二通信设备根据第二指示信息指示的码字的码率、调制阶数、流数、传输带宽、或最大HARQ进程数目限制，对接收到的码字按第二指示信息指示的码率做合并，降低内存，并改变对应的最大HARQ进程数，同时清空不再使用的HARQ进程。进行上述操作后，第二通信设备再进行译码。
示例性地，在该实现方式下，第二通信设备接收到的码字按第二指示信息指示的码率做合并包括：
在第一通信设备确定待传输的全部码字比特之后，第一通信设备通过上述的第二指示信息指示循环缓冲区是否开启，并指示是否调整实际传输码率(如，码字的码率)，第二通信设备可以根据第二指示信息的指示对多次接收到的码字进行合并。
为了便于理解，结合具体的示例说明第二通信设备进行码字合并的过程。
示例二：
步骤一：第一通信设备确定待传输的全部码字比特为：01010101111100000000010000。
步骤二：第一通信设备通过上述的第二指示信息指示开启缓冲区，即实际待传输的码字比特为：01010101111100000。
步骤三：第一次传输(初传)过程中，第一通信设备根据实际情况给第二通信设备发了上述码字比特中的一部分(也可以是全部)bit：010101011111。
步骤四：第二通信设备译码失败，第二通信设备向第一通信设备发送重传请求消息，该重传请求消息用于请求第一通信设备重传信息。
步骤五：第一通信设备向第二通信设备进行重传。
可选地，为了尽可能给第二通信设备更多的不同信息，第一通信设备进行重传的过程中可以根据第一次传输过程中的码字比特，平移一段位置，再传码字比特，如重传的码字比特可以为：101111100000。步骤六：第二通信设备进行码字合并。
示例性地，第二通信设备进行码字合并包括对初传、重传的信息比特中，在初传中实际位置相同的比特的译码软信息进行合并，例如，对于1011111比特为初传、重传中实际位置相同的比特，第二通信设备可以将1011111的两次译码的结果，进行合并，提高译码准确性。具体地，第二通信设备可以基于第二指示信息获知可以合并的比特。
作为另一种可能的实现方式，对于上行传输，第二通信设备根据第二指示信息指示的码字的码率、调制阶数、流数、传输带宽、或最大HARQ进程数目限制，对编码后的码字做相应比例的截断(或比较第二指示信息指示的码率和最低码率的大小，设置新的码率，并按照该码率进行截断)，并改变对应的最大HARQ进程数。进行上述操作后，第二通信设备再根据第一通信设备的DCI重传调度或ACK反馈或HARQ反馈，进行下一轮的上行数据传输。
示例性地，在该实现方式下，第二通信设备对编码后的码字做相应比例的截断包括：
在第二通信设备确定待传输的全部码字比特之后，第二通信设备通过上述的第二指示信息确定循环缓冲区是否开启，以及相应的传输码率，从而第二通信设备可以根据第二指示信息的指示对编码后的码字做相应比例的截断。
为了便于理解，结合具体的示例说明第二通信设备对编码后的码字做相应比例的截断的过程。
示例三：
步骤一：第二通信设备确定待传输的全部码字比特为：010101011111000000000100000。
步骤二：第二通信设备根据第一通信设备的第二指示信息，确定循环缓冲区是否开启，以及开启后的码率(如，实际码率和/或第二指示信息指示的码率)，从而决定缓冲区的大小。例如，原来长度为27的比特信息，如果第二指示信息指示的码率是2/3，那就是要传长度为18的比特信息。还例如，对于实际码率，原来长度为27的实际码率是1/3，即实际信息是长度9，第二指示信息指示的新的实际码率是1/2，即新的信息长度就是18。第二指示信息指示的码率和新码率都是根据第二指示信息的值来确定的。
步骤三：第二通信设备进行码字截断，如，截断后的码字比特为：010101011111000000。
另外，第一通信设备可以根据每个HARQ进程的比特数目，和第二通信设备上报的内存余量的大小，确定实际可以支持的HARQ进程的数目(如， 其中，表示向下取整)，第二指示信息可以指示实际可以支持的HARQ进程的数目，从而第二通信设备可以基于第二指示信息进行HARQ进程数调整。
作为示例而非限定，该实施例中第一通信设备确定并上报内存余量的触发方式包括但不限于以下两种方式：
方式一：第一通信设备通过第三指示信息触发第二通信设备进行余量计算并上报。
在方式一所示的情况下，图3所示的方法流程还包括：
S302，第一通信设备向第二通信设备发送第三指示信息，相应的，第二通信设备接收来自第一通信设备的第三指示信息。
具体地，第三指示信息用于指示上报内存余量。
示例性地，第一通信设备可以通过以下信息中的至少一种发送上述的第三指示信息：
DCI、RRC、或MAC控制元素(control element，CE)等。
应理解，上述的通过DCI、RRC、或MAC CE发送第三指示信息的方式仅为示例，对本申请的保护范围不构成任何的限定，第一通信设备还可以通过其他方式向第二通信设备发送第三指示信息，例如，通过新增信令向第二通信设备发送第三指示信息。
作为一种可能的实现方式，第一通信设备可以在第二通信设备初始接入阶段向第二通信设备发送第三指示信息。
例如，第二通信设备初始接入时，第二通信设备向第一通信设备发送能力信息，该能力信息用于指示第二通信设备的通信能力，第一通信设备向第二通信设备发送第三指示信息。
方式二：第二通信设备确定是否满足预设的第一条件，在满足第一条件的情况下进行余量计算并上报。
在方式二所示的情况下，图3所示的方法流程还包括：
S303，第二通信设备确定满足第一条件。
具体地，第一条件用于确定是否上报内存余量。例如，在满足第一条件的情况下，确定上报内存余量；还例如，在不满足第一条件的情况下，确定不上报内存余量。
可选地，第一条件包括但不限于以下至少一项：
第二通信设备的收发天线数大于第一阈值、第二通信设备的信道的最大秩数大于第二阈值、第二通信设备调度的流数大于第三阈值、第二通信设备的循环缓冲区码字数目大于第四阈值、第二通信设备的通信带宽大于第五阈值、所述第二通信设备传输的数据的调制阶数大于第六阈值、所述第二通信设备传输的数据的重传反馈时延大于第七阈值、所述第二通信设备的内存总量小于第八阈值、或所述第二通信设备其他功能占用内存大小大于第九阈值，其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。其中，本申请中对于第一阈值、第二阈值、第三阈值、第四阈值、第五阈值、第六阈值、第七阈值、第八阈值、或第九阈值的设定不做任何的限定，可以是第二通信设备和第一通信设备协商的阈值，还可以是第一通信设备配置的阈值，还可以是协议预定义的阈值等。
示例性地，第二通信设备的信道的最大秩数与第二通信设备的收发天线数相关，其中，第二通信设备的发送天线到第二通信设备的接收天线构成信道矩阵，第二通信设备的收发天线多该信道矩阵越大，从而信道矩阵的秩增大。
示例性地，第二通信设备调度的流数与第二通信设备的收发天线对应的信道矩阵相关，其中，信道矩阵的秩越大，表示可以传输的流数越多。第二通信设备调度的流数(或者说第二通信设备传输的流数)可能小于秩数。
示例性地，第二通信设备传输的数据的调制阶数可以是第二通信设备接收的数据的调制阶数，或者，第二通信设备发送的数据的调制阶数。同理，第二通信设备传输的数据的重传反馈时延可以是第二通信设备接收的数据的重传反馈时延，或者，第二通信设备发送的数据的重传反馈时延。
作为示例而非限定，若第一条件为第二通信设备的收发天线数大于第一阈值，则可以理解为：终端设备的收发天线数越多，第二通信设备传输的流数越多，从而传输的码字数目越多，对应的最大HARQ进程数也会增加，此时无论是上行还是下行，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备的信道的最大秩数大于第二阈值，则可以理解为：终端设备的最大秩数越大表示数据传输过程中，第二通信设备传输的最大流数越大，从而传输的码字数目越多，对应的最大HARQ进程数也会增加，此时无论是上行还是下行，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备的调度的流数大于第三阈值，则可以理解为：第二通信设备的调度的流数越多，从而传输的码字数目越多，对应的最大HARQ进程数也会增加，此时无论是上行还是下行，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备的循环缓冲区码字数目大于第四阈值，则可以理解为：第二通信设备的循环缓冲区码字数目多，就是传输的01比特多，占用的内存就大，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备的通信带宽大于第五阈值，则可以理解为：带宽越大，在相同谱效下，传输的数据就多，占用的内存就大，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备传输的数据的调制阶数(如，256QAM,1024QAM等等)大于第六阈值，则可以理解为：数据调制阶数越大，数据占用的内存就大，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备传输的数据的重传反馈时延大于第七阈值，则可以理解为：数据的重传反馈时延越大，对应的最大HARQ进程时延越大，终端设备的循环缓冲区占用的内存会越来越大，可能导致内存余量不足。
若第一条件为第二通信设备的内存总量小于第八阈值，则可以理解为：第二通信设备的内存总量越小，端设备的循环缓冲区可用的内存会越来越小，可能导致内存余量不足。
若第一条件为第二通信设备其他功能占用内存大小大于第九阈值，则可以理解为：第二通信设备其他功能占用内存大小越大，终端设备的循环缓冲区可用的内存会越来越小，可能导致内存余量不足。
可选地，第一条件可以通过表格的形式体现。
示例性地，上述第一条件的设定可以是基于目前NR通信系统中终端设备的配置确定的，若第二通信设备的配置符合目前NR通信系统中终端设备的配置，则第二通信设备可以确定不上报内存余量，例如，第二通信设备的收发天线数小于或者等于第一阈值的情况下，第二通信设备可以不上报内存余量。若第二通信设备的配置不符合目前NR通信系统中终端设备的配置，则第二通信设备可以确定上报内存余量，例如，第二通信设备的收发天线数大于第一阈值的情况下，第二通信设备确定可以上报内存余量。
应理解，上述的第一条件的具体形式仅为示例，对本申请的保护范围不构成任何的限定，本申请中第二通信设备还可以通过其他条件确定是否上报内存余量，例如，根据第二通信设备的能力信息、当前第二通信设备所位于的频点信息等等，这里不再一一举例说明。
可选地，在方式二所示的情况下，第一通信设备根据是否满足第一条件确定是否上报内存余量可以是第二通信设备指示的，则图3所示的方法流程还包括：
S304，第一通信设备向第二通信设备发送第四指示信息，相应的，第二通信设备接收来自第一通信设备的第四指示信息。
具体地，第四指示信息用于指示第二通信设备在满足第一条件的情况下，上报内存余量。可选地，第四指示信息用于指示在不满足第一条件的情况下，可以无需上报内存余量；或者，第四指示信息用于指示在满足第二条件的情况下，可以无需上报内存余量。
示例性地，第一通信设备可以通过RRC和/或MAC CE发送上述的第四指示信息。
可选地，在该实施例中第二通信设备可以根据内存余量的上报周期或参考时刻确定发送上述第一指示信息的第一时刻，其中，上报周期指示上报内存余量的周期，参考时刻包括发送上行数据的时刻、发送上行混合自动重传请求HARQ反馈的时刻、或接收到下行数据的时刻。
例如，第二通信设备可以周期性向第二通信设备上报内存余量；还例如，对于上行传输的场景，第二通信设备可以在向第一通信设备发送上行数据之后的一段时间内向第一通信设备上报内存余量；又例如，对于下行传输的场景，第二通信设备可以在向第一通信设备发送上行HARQ反馈之后的一段时间内向第一通信设备上报内存余量；又例如，对于下行传输的场景，第二通信设备可以在接收到来自第一通信设备下行数据之后的一段时间内向第一通信设备上报内存余量。
作为示例而非限定，第二通信设备上报内存余量的时机可以是协议预定义的、或者第一通信设备和第二通信设备协商的、或者可以是第一通信设备通过第五指示信息指示的。
示例性地，第五指示信息还可以指示第一通信设备上报内存余量的周期或时间间隔。
例如，第五指示信息还用于指示第二通信设备在上报上行数据之后的第一时长后，上报内存余量，其中，第一时长可以为预设值，可以称为时间间隔。如，第五指示信息中包括信息#4，该信息#4用于指示第二通信设备每次上传上行数据的第一时长之后，向第一通信设备上报当前的内存余量。
还例如，第五指示信息还用于指示第二通信设备周期性上报内存余量，其中，内存余量的上报周期可以通过第五指示信息指示或者可以为预定义的。
又例如，第四指示信息还用于指示第二通信设备在发送上行HARQ反馈的第二时长之后，上报内存余量，其中，第二时长可以为预设值，可以称为时间间隔。如，第五指示信息中包括信息#5，该信息#5用于指示第二通信设备每次发送上行HARQ反馈的第二时长之后，向第一通信设备上报当前的内存余量。
又例如，第五指示信息还用于指示第二通信设备在接收到下行数据的第三时长之后，上报内存余量，其中，第三时长可以为预设值，可以称为时间间隔。如，第五指示信息中包括信息#6，该信息#6用于指示第二通信设备每次接收到下行数据的第三时长之后，向第一通信设备上报当前的内存余量。
图3所示的通信方法中，第一通信设备可以根据第二通信设备上报的内存余量，进行循环缓冲区的大小限制的指示，即第一通信设备指示第二通信设备的循环缓冲区的大小限制情况时，参考了第二通信设备的内存余量，能够快速响应第二通信设备内存不足的问题，降低第二通信设备因内存不足无法译码正确的风险，提升传输性能。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
还应理解，在上述一些实施例中，主要以现有的网络架构中的设备为例进行了示例性说明，应理解，对于设备的具体形式本申请实施例不作限定。例如，在未来可以实现同样功能的设备都适用于本申请实施例。
可以理解的是，上述各个方法实施例中，由设备(如第一通信设备和第二通信设备)实现的方法和操作，也可以由可用于设备的部件(例如芯片或者电路)实现。
还可以理解，本申请的各实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，也可以在某些场景下，与其他特征进行结合，不作限定。
以上，结合图3详细说明了本申请实施例提供的通信方法。上述通信方法主要从第一通信设备和第二通信设备之间交互的角度进行了介绍。可以理解的是，第一通信设备和第二通信设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。
本领域技术人员应该可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
以下，结合图4至图6详细说明本申请实施例提供的通信装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，部分内容不再赘述。
本申请实施例可以根据上述方法示例对第一通信设备和第二通信设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。
图4是本申请实施例提供的通信装置10的示意性框图。该装置10包括收发模块11和处理模块12。收发模块11可以实现相应的通信功能，处理模块12用于进行数据处理，或者说该收发模块11用于执行接收和发送相关的操作，该处理模块12用于执行除了接收和发送以外的其他操作。收发模块11还可以称为通信接口或通信单元。其中，收发模块11可以包括接收模块和/或发送模块，该接收模块于执行接收相关的操作，该发送模块于执行发送相关的操作。
可选地，该装置10还可以包括存储模块13，该存储模块13可以用于存储指令和/或数据，处理模块12可以读取存储模块中的指令和/或数据，以使得装置实现前述各个方法实施例中设备的动作；上述各模块也可以称为单元，如收发单元，处理单元，存储单元等。
在一种设计中，该装置10可对应于上文方法实施例中的第一通信设备，或者是第一通信设备的组成部件(如芯片)。
该装置10可实现对应于上文方法实施例中的第一通信设备执行的步骤或者流程，其中，收发模块11可用于执行上文方法实施例中第一通信设备的收发相关的操作，处理模块12可用于执行上文方法实施例中第一通信设备的处理相关的操作。
在一种可能的实现方式，收发模块11，用于接收来自第二通信设备的第一指示信息，所述第一指示用于指示所述第二通信设备的内存余量。收发模块11，还用于根据所述内存余量向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备的循环缓冲区的大小限制情况。
当该装置10用于执行图3中的方法时，收发模块11可用于执行方法中的收发信息的步骤，如步骤S302、S304、S310、S320；处理模块12可用于执行方法中的处理步骤。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
在另一种设计中，该装置10可对应于上文方法实施例中的第二通信设备，或者是第二通信设备的组成部件(如芯片)。
该装置10可实现对应于上文方法实施例中的第二通信设备执行的步骤或者流程，其中，收发模块11可用于执行上文方法实施例中第二通信设备的收发相关的操作，处理模块12可用于执行上文方法实施例中第二通信设备的处理相关的操作。
在一种可能的实现方式，收发模块11，用于向第一通信设备发送第一指示信息，所述第一指示信息用于指示所述内存余量。收发模块11，用于接收来自所述第一通信设备的第二指示信息，所述第二指示信息用于指示所述第一通信设备的循环缓冲区的大小限制情况，所述第二指示信息基于所述内存余量确定。
当该装置10用于执行图3中的方法时，收发模块11可用于执行方法中的收发信息的步骤，如步骤S302、S304、S310、S320；处理模块12可用于执行方法中的处理步骤，如步骤S303、S301、S330。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，这里的装置10以功能模块的形式体现。这里的术语“模块”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置10可以具体为上述实施例中的移动管理网元，可以用于执行上述各方法实施例中与移动管理网元对应的各个流程和/或步骤；或者，装置10可以具体为上述实施例中的终端设备，可以用于执行上述各方法实施例中与终端设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
上述各个方案的装置10具有实现上述方法中的设备(如第一通信设备和第二通信设备)所执行的相应步骤的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块；例如收发模块可以由收发机替代(例如，收发模块中的发送单元可以由发送机替代，收发模块中的接收单元可以由接收机替代)，其它单元，如处理模块等可以由处理器替代，分别执行各个方法实施例中的收发操作以及相关的处理操作。
此外，上述收发模块11还可以是收发电路(例如可以包括接收电路和发送电路)，处理模块可以是处理电路。
图5是本申请实施例提供另一种通信装置20的示意图。该装置20包括处理器21，处理器21用于执行存储器22存储的计算机程序或指令，或读取存储器22存储的数据/信令，以执行上文各方法实施例中的方法。可选地，处理器21为一个或多个。
可选地，如图5所示，该装置20还包括存储器22，存储器22用于存储计算机程序或指令和/或数据。该存储器22可以与处理器21集成在一起，或者也可以分离设置。可选地，存储器22为一个或多个。
可选地，如图5所示，该装置20还包括收发器23，收发器23用于信号的接收和/或发送。例如，处理器21用于控制收发器23进行信号的接收和/或发送。其中，收发器23可以包括接收器和/或发送器，该接收器用于信号的接收，该发送器用于信号的发送；若通信装置20为芯片，则收发器23为芯片的输入输出接口，其中输出对应发送，输入对应接收。
作为一种方案，该装置20用于实现上文各个方法实施例中由第一通信设备或第二通信设备执行的操作。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图6是本申请实施例提供一种芯片系统30的示意图。该芯片系统30(或者也可以称为处理系统)包括逻辑电路31以及输入/输出接口(input/output interface)32。
其中，逻辑电路31可以为芯片系统30中的处理电路。逻辑电路31可以耦合连接存储单元，调用存储单元中的指令，使得芯片系统30可以实现本申请各实施例的方法和功能。输入/输出接口32，可以为芯片系统30中的输入输出电路，将芯片系统30处理好的信息输出，或将待处理的数据或信令信息输入芯片系统30进行处理。
作为一种方案，该芯片系统30用于实现上文各个方法实施例中由终端设备或网络设备执行的操作。
例如，逻辑电路31用于实现上文方法实施例中由终端设备执行的处理相关的操作；输入/输出接口32用于实现上文方法实施例中由终端设备执行的发送和/或接收相关的操作。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述各方法实施例中由设备执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法各实施例中由第一通信设备或第二通信设备执行的方法。
本申请实施例还提供一种计算机程序产品，包含指令，该指令被计算机执行时以实现上述各方法实施例中由第一通信设备或第二通信设备执行的方法。
本申请实施例还提供了一种通信系统，包括前述的第一通信设备和第二通信设备。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器，或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD)等。例如，前述的可用介质包括但不限于：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (21)

  1. 一种通信方法，其特征在于，应用于第一通信设备，所述方法包括：
    接收来自第二通信设备的第一指示信息，所述第一指示用于指示所述第二通信设备的内存余量；
    根据所述内存余量向所述第二通信设备发送第二指示信息，所述第二指示信息用于指示所述第二通信设备的循环缓冲区的大小限制情况。
  2. 根据权利要求1所述的方法，其特征在于，在所述接收来自第二通信设备的第一指示信息之前，所述方法还包括：
    向所述第二通信设备发送第三指示信息，所述第三指示信息用于指示第二通信设备上报所述内存余量；或者，
    向所述第二通信设备发送第四指示信息，所述第四指示信息用于指示第二通信设备在满足第一条件的情况下，上报所述内存余量，其中，所述第一条件用于确定是否上报所述内存余量。
  3. 根据权利要求2所述的方法，其特征在于，所述第一条件包括以下至少一项：
    所述第二通信设备的收发天线数大于第一阈值、所述第二通信设备的信道的最大秩Rank数大于第二阈值、所述第二通信设备调度的流数大于第三阈值、所述第二通信设备的循环缓冲区码字数目大于第四阈值、所述第二通信设备的通信带宽大于第五阈值、所述第二通信设备传输的数据的调制阶数大于第六阈值、所述第二通信设备传输的数据的重传反馈时延大于第七阈值、所述第二通信设备的内存总量小于第八阈值、或所述第二通信设备其他功能占用内存大小大于第九阈值，
    其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第一指示信息用于指示所述内存余量，包括以下至少一项：
    所述第一指示信息指示所述内存余量是否充足；或者，
    所述第一指示信息指示所述内存余量的大小；或者，
    所述第一指示信息指示所述内存余量与传输数据所需的内存大小的比值。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述接收来自第二通信设备的第一指示信息，包括：
    接收来自第二通信设备的上行控制信息UCI，所述上行控制信息中包括所述第一指示信息。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述向所述第二通信设备发送第二指示信息，包括：
    向所述第二通信设备发送下行控制信息DCI，所述下行控制信息中包括所述第二指示信息。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述第二指示信息指示以下信息中的至少一项：
    码字的码率、传输数据的调制阶数、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目。
  8. 根据权利要求7所述的方法，其特征在于，在所述第一指示信息指示所述内存余量不足以支持所述第二通信设备的循环缓冲区的HARQ进程数目情况下，所述第二指示信息指示限制传输数据的最大的HARQ进程数目、提升所述码字的码率、降低传输数据的调制阶数、降低传输数据的流数、或降低传输数据的传输带宽中的至少一项。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第二指示信息占用一个比特，所述比特值用于指示限制使用所述循环缓存区或者不限制使用所述循环缓存区；或者，
    所述第二指示信息占用多个比特，所述比特的不同取值用于指示不同的传输数据的调制阶数、码字的码率、传输数据的流数、传输数据的传输带宽、或传输数据的混合自动重传请求HARQ进程数目中的至少一项。
  10. 一种通信方法，其特征在于，应用于第二通信设备，所述方法包括：
    确定所述第二通信设备的内存余量；
    向第一通信设备发送第一指示信息，所述第一指示信息用于指示所述内存余量；
    接收来自所述第一通信设备的第二指示信息，所述第二指示信息用于指示所述第一通信设备的循环缓冲区的大小限制情况，所述第二指示信息基于所述内存余量确定。
  11. 根据权利要求10所述的方法，其特征在于，在所述第二通信设备的确定内存余量之前，所述方法还包括：
    接收来自所述第一通信设备的第三指示信息，所述第三指示信息用于指示上报所述内存余量；或者，
    确定满足第一条件，所述第一条件用于确定是否上报所述内存余量。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一通信设备的第四指示信息，所述第四指示信息用于指示在满足所述第一条件的情况下，上报所述内存余量。
  13. 根据权利要求10至12中任一项所述的方法，其特征在于，所述确定所述第一通信设备的内存余量，包括：
    根据上行数据对应的以下参数中的至少一项确定内存余量：
    带宽、码字数目、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、所述第二通信设备的内存总量、所述第二通信设备其他功能占用内存大小；或者，
    根据下行数据对应的以下参数中的至少一项确定内存余量：
    带宽、码字数目、译码结果、流数、调制阶数、重传反馈间隔、子载波间隔、码字大小、所述第二通信设备的内存总量、所述第二通信设备其他功能占用内存大小，
    其中，所述第二通信设备其他功能为除支持所述第二通信设备的循环缓冲区码字的存储之外的其他功能。
  14. 根据权利要求10至13中任一项所述的方法，其特征在于，所述向所述第一通信设备发送所述第一指示信息，包括：
    向所述第一通信设备发送上行控制信息UCI，所述上行控制信息中包括所述第一指示信息。
  15. 根据权利要求10至14中任一项所述的方法，其特征在于，所述接收来自所述第一通信设备的第二指示信息，包括：
    接收来自所述第一通信设备的下行控制信息DCI，所述下行控制信息中包括所述第二指示信息。
  16. 根据权利要求10至15中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二通信设备根据所述第二指示信息对接收到的码字进行处理、对编码后的码字进行处理、或调整最大混合自动重传请求HARQ进程数，
    其中，所述对接收到的码字进行处理包括基于码字的码率对接收到的码字进行合并处理，所述对编码后的码字进行处理包括基于码字的码率对编码后的码字进行截断处理。
  17. 一种通信装置，其特征在于，包括用于实现如权利要求1至9中任一项所述的方法的模块；或者包括用于实现如权利要求10至16中任一项所述的方法的模块。
  18. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器用于执行计算机程序或指令，以使得如执行权利要求1至9中任一项所述的方法被执行；或者，以使得如执行权利要求10至16中任一项所述的方法被执行。
  19. 根据权利要求18所述的通信装置，其特征在于，
    所述通信装置还包括存储器，所述存储器用于存储所述计算机程序或指令；和/或，
    所述通信装置还包括通信接口，所述通信接口与所述至少一个处理器耦合，所述通信接口用于输入和/或输出信息。
  20. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得如权利要求1至16中任一项所述的方法被执行。
  21. 一种计算机程序产品，其特征在于，包括计算机程序或指令，当所述计算机程序或指令被处理器执行时，使得如权利要求1至16中任一项所述的方法被执行。
PCT/CN2025/104404 2024-08-02 2025-06-27 通信方法和通信装置 Pending WO2026026366A1 (zh)

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