Communication method and related apparatus

Abstract

The present application provides a communication method and a related apparatus, which are applied to the technical field of communications. In the technical solution provided in the present application, a terminal device sends a reference signal; and receives first information from a network device, the first information indicating a first interpolation method, the first interpolation method being used for performing interpolation processing on first precoding indicators, the first precoding indicators comprising a precoding indicator corresponding to each sub-band among a first portion of sub-bands, and the first portion of sub-bands comprising a portion of sub-bands of a bandwidth occupied by the reference signal, or, the first precoding indicators comprising a precoding indicator corresponding to each antenna port among a first portion of antenna ports, and the first portion of antenna ports comprising a portion of antenna ports among antenna ports occupied by the reference signal. The interpolation method provided by the present application improves precoding precision and reduces the signaling overhead of uplink precoding.

Description

Communication method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 28, 2023, with application number 202311615652.1 and application name “Communication Methods and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to communication methods and related devices. Background Art

[0003] In a communication system, in codebook (CB)-based uplink transmission, the user equipment (UE) sends a reference signal (RS). The network device measures the received RS and sends a transmit precoding matrix indicator (TPMI) to the UE. The UE sends an uplink data channel to the network device based on the PMI, where the PMI enables the uplink data channel to be mapped to the corresponding antenna port.

[0004] With the development of communication systems, communication resources are becoming increasingly scarce. Therefore, how to save communication resources has become a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The present application provides a communication method and related apparatus, which can reduce uplink MIMO precoding indication overhead, thereby improving communication performance.

[0006] In a first aspect, the present application provides a communication method, which is applied to a terminal device. The method includes: sending a reference signal; receiving first information from a network device, the first information indicating a first interpolation method, the first interpolation method being used to interpolate a first precoding indicator; wherein the first precoding indicator includes a precoding indicator corresponding to each subband in a first portion of subbands, the first portion of subbands including a portion of subbands in a bandwidth occupied by the reference signal, or the first precoding indicator includes a precoding indicator corresponding to each antenna port in a first portion of antenna ports, the first portion of antenna ports including a portion of antenna ports occupied by the reference signal.

[0007] In this method, the terminal device recovers the precoding of all subbands or all spatial domains according to the interpolation method indicated by the network device and the received partial subband or partial spatial domain precoding indicator according to the interpolation method, and then maps the uplink data channel to the corresponding antenna port based on the obtained precoding information, thereby completing the transmission of the uplink signal.

[0008] In some possible implementations, the first interpolation method is a popular interpolation method.

[0009] In this method, the terminal device uses a manifold interpolation method to interpolate the precoding indicators of part of the subband or part of the spatial domain indicated by the network device, and then can obtain the precoding of all subbands or all spatial domains.

[0010] In some possible implementations, when the first precoding indicator includes a precoding indicator corresponding to each subband in the first part of the subbands, the method further includes: receiving second information from the network device, the second information indicating at least one of the following information: the number of resource blocks (RBs) occupied by each subband, the position of each subband in the first part of the subbands in the bandwidth, the number of precoding indicators included in the first precoding indicator, the angular change between the precoding vectors indicated by the precoding indicators corresponding to the subbands in the bandwidth, or the distribution of the precoding indicators corresponding to the subbands in the bandwidth.

[0011] In this method, the network device can simplify the interpolation calculation process through additional popular interpolation method related parameters, ensure the accuracy of sub-band precoding, thereby reducing the calculation amount of the terminal device and reducing the signaling overhead of uplink precoding.

[0012] In some possible implementations, when the first precoding indicator includes a precoding indicator corresponding to each antenna port in the first part of the antenna ports, the method further includes: receiving third information from the network device, the third information indicating at least one of the following information: the number of antennas included in each antenna port, the position of each antenna port in the first part of the antenna ports in the antenna ports occupied by the reference signal, the number of precoding indicators included in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the antenna ports occupied by the reference signal, or the distribution of the precoding indicators corresponding to the antenna ports in the antenna ports occupied by the reference signal.

[0013] In some possible implementations, the second information indicating the angle change includes: the second information indicating an index of the angle change.

[0014] In some possible implementations, the second information indicating the distribution condition includes: the second information indicating an index of the distribution condition.

[0015] In some possible implementations, the first information indicating the first interpolation method includes: the first information indicating an index of the first interpolation method among multiple interpolation methods.

[0016] In some possible implementations, the method further includes: sending fourth information to the network device, where the fourth information indicates an interpolation method supported by the terminal.

[0017] In a second aspect, the present application provides a communication method, which is applied to a network device. The method includes: receiving a reference signal from a terminal device; sending first information, the first information indicating a first interpolation method, the first interpolation method being used to interpolate a first precoding indicator; wherein the first precoding indicator includes a precoding indicator corresponding to each subband in a first portion of subbands, the first portion of subbands including a portion of subbands in a bandwidth occupied by the reference signal, or the first precoding indicator includes a precoding indicator corresponding to each antenna port in a first portion of antenna ports, the first portion of antenna ports including a portion of antenna ports occupied by the reference signal.

[0018] In this method, the network device indicates the interpolation method to the terminal device and receives the partial subband or partial spatial domain precoding indicator. The terminal device recovers the precoding of all subbands or all spatial domains according to the interpolation method, and then maps the uplink data channel to the corresponding antenna port based on the obtained precoding information, thereby completing the transmission of the uplink signal.

[0019] In some possible implementations, the first interpolation method is a popular interpolation method.

[0020] In this method, the terminal device uses a manifold interpolation method to interpolate the precoding indicators of part of the subband or part of the spatial domain indicated by the network device, and then can obtain the precoding of all subbands or all spatial domains.

[0021] In some possible implementations, when the first precoding indicator includes a precoding indicator corresponding to each subband in the first part of the subbands, the method further includes: sending second information, where the second information indicates at least one of the following information: the number of resource blocks (RBs) occupied by each subband, the position of each subband in the first part of the subbands in the bandwidth, the number of precoding indicators included in the first precoding indicator, the angular change between the precoding vectors indicated by the precoding indicators corresponding to the subbands in the bandwidth, or the distribution of the precoding indicators corresponding to the subbands in the bandwidth.

[0022] In this method, the network device can simplify the interpolation calculation process through additional popular interpolation method related parameters, ensure the accuracy of sub-band precoding, thereby reducing the calculation amount of the terminal device and reducing the signaling overhead of uplink precoding.

[0023] In some possible implementations, when the first precoding indicator includes a precoding indicator corresponding to each antenna port in the first part of antenna ports, the method further includes: sending third information, wherein the third information indicates at least one of the following information: the number of antennas included in each antenna port, the position of each antenna port in the first part of antenna ports in the antenna ports occupied by the reference signal, the number of precoding indicators included in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the antenna ports occupied by the reference signal, or the distribution of the precoding indicators corresponding to the antenna ports in the antenna ports occupied by the reference signal.

[0024] In some possible implementations, the second information indicating the angle change includes: the second information indicating an index of the angle change.

[0025] In some possible implementations, the second information indicating the distribution condition includes: the second information indicating an index of the distribution condition.

[0026] In some possible implementations, the first information indicating the first interpolation method includes: the first information indicating an index of the first interpolation method among multiple interpolation methods.

[0027] In some possible implementations, the method further includes: sending fourth information to the network device, where the fourth information indicates an interpolation method supported by the terminal.

[0028] In a third aspect, the present application provides a communication device, comprising modules or units for implementing the method in the first aspect and any possible implementation of the first aspect. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0029] In a fourth aspect, the present application provides a communication device, comprising modules or units for implementing the method in the second aspect and any possible implementation of the second aspect. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0030] In a fifth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the communication method described in the first aspect or any possible implementation of the first aspect. The communication device may be a chip or a chip system used in a terminal device.

[0031] The apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect or any possible implementation thereof may be implemented. The apparatus may further include a communication interface for communicating between the apparatus and other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0032] In a sixth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the communication method described in the second aspect or any possible implementation of the second aspect. The communication device may be a chip or a chip system used in a terminal device.

[0033] The apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect or any possible implementation thereof may be implemented. The apparatus may further include a communication interface for communicating between the apparatus and other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0034] In a seventh aspect, the present application provides a computer-readable storage medium storing a program code for execution by a communication device, the program code including instructions for implementing the method in the first aspect and any possible implementation manner of the first aspect.

[0035] In an eighth aspect, the present application provides a computer-readable storage medium storing a program code for execution by a communication device, wherein the program code includes instructions for implementing the method in the second aspect and any possible implementation manner of the second aspect.

[0036] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when executed on a communication device, enables the communication device to implement the method in the first aspect and any possible implementation of the first aspect.

[0037] In a tenth aspect, the present application provides a computer program product comprising instructions, which, when executed on a communication device, enables the communication device to implement the method in the second aspect and any possible implementation of the second aspect.

[0038] In the eleventh aspect, the present application provides a communication system, which includes a communication device for implementing the method in the first aspect and any possible implementation of the first aspect and / or a communication device for implementing the method in the second aspect and any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic diagram of a communication system applicable to the method of an embodiment of the present application;

[0040] FIG2 is a schematic diagram of another communication system applicable to the method of an embodiment of the present application;

[0041] FIG3 is a schematic flow chart of a communication method provided in one embodiment of the present application;

[0042] FIG4 is a schematic diagram of obtaining a sub-band precoding indicator in the frequency domain;

[0043] FIG5 is a schematic diagram showing the distribution of interpolation points between precoding vectors;

[0044] FIG6 shows the distribution of interpolation points of three exemplary interpolation methods of the present application;

[0045] FIG7 is a schematic diagram of obtaining a subband precoding indicator in the spatial domain;

[0046] FIG8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0047] FIG9 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0049] To facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0050] It should be noted that in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0051] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and (or) c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0052] To facilitate understanding of the communication method provided in the embodiments of the present application, the system architecture and application scenarios of the communication method provided in the embodiments of the present application are described below. It is understood that the system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application.

[0053] Throughout the evolution of communications technology, high throughput and massive connections have always been core challenges for wireless communication networks. Multiple-input, multiple-output (MIMO) technology, a key technology that significantly increases system capacity and meets high-speed transmission requirements, leverages spatial resources to achieve array gain, multiplexing and diversity gain, and interference cancellation gain without increasing system bandwidth. This technology can exponentially increase the capacity and spectral efficiency of communication systems.

[0054] In the field of communications, combined with the application of MIMO technology, the technical solutions provided by this application can be applied to various communication systems, such as: fifth-generation (5G) or new radio (NR) systems, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area networks (WLAN) systems, satellite communication systems, future communication systems, such as sixth-generation (6G) mobile communication systems, or integrated systems of multiple systems. The technical solutions provided by this application can also 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 or other communication systems, such as the sixth generation (6G).

[0055] A device in a communication system can send signals to or receive signals from another device. These signals may include information, signaling, or data. The term "device" can also be replaced by an entity, network entity, communication device, communication module, node, communication node, etc. This application uses devices as an example for description. For example, a communication system may include at least one terminal device and at least one network device. A network device can send downlink signals to a terminal device, and / or a terminal device can send uplink signals to a network device.

[0056] In an embodiment of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0057] The terminal device may be a device that provides voice / data, such as a handheld device or vehicle-mounted device with a wireless connection function. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0058] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0059] In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, which can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiments of the present application, only the terminal device is used as an example for description, and the embodiments of the present application are not limited to the solutions of the embodiments of the present application.

[0060] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, secondary station, multi-standard radio (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), radio unit (RU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip that is set in the aforementioned equipment or device. The base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network side device in a 6G network, a device that performs the base station function in future communication systems, etc. The base station can support networks with the same or different access technologies. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.In some deployments, the network devices mentioned in the embodiments of the present application may include a CU, a DU, or both a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)), a user plane CU node (central unit-user plane (CU-UP)), and a DU node. For example, the network devices may include a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU.

[0061] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or RU. The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in a radio frequency device or radio unit, such as an RRU, AAU, or RRH.

[0062] The RAN node may support one or more types of fronthaul interfaces, with different fronthaul interfaces corresponding to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and the RU is another type of interface, relative to the CPRI, some of the downlink and / or uplink baseband functions, such as precoding, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) for downlink, are moved from the DU to the RU for implementation; and for uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / cyclic prefix (CP) removal, are moved from the DU to the RU for implementation. In one possible implementation, the interface may be an enhanced common public radio interface (eCPRI). In the eCPRI architecture, the division between the DU and RU is different, corresponding to different types (category, Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0063] Taking eCPRI Cat A as an example, for downlink transmission, based on layer mapping, the DU is configured to implement layer mapping and one or more functions preceding it (i.e., one or more of coding, rate matching, scrambling, modulation, and layer mapping). Other functions after layer mapping (e.g., RE mapping, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition) are moved to the RU for implementation. For uplink transmission, based on RE demapping, the DU is configured to implement demapping and one or more functions preceding it (i.e., one or more of decoding, rate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and RE demapping). Other functions after demapping (e.g., one or more of digital BF or fast Fourier transform (FFT) / CP removal) are moved to the RU for implementation. It is understandable that for the functional description of DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be described in detail here.

[0064] In one possible design, the processing unit for implementing baseband functions in the BBU is called a baseband high layer (BBH) unit, and the processing unit for implementing baseband functions in the RRU / AAU / RRH is called a baseband low layer (BBL) unit.

[0065] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0066] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device that can support the network device to implement the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of the present application, only the device for implementing the functions of the network device is used as an example to illustrate, and does not constitute a limitation on the solutions of the embodiments of the present application.

[0067] The network device and / or terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface; it can also be deployed on aircraft, balloons and satellites in the air. The embodiments of this application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or they can be software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific forms of the terminal device and the network device.

[0068] Figure 1 is a schematic diagram of a communication system applicable to the methods of embodiments of the present application. As shown in Figure 1 , communication system 100 may include at least one network device, such as network device 110 shown in Figure 1 ; communication system 100 may also include at least one terminal device, such as terminal device 120 and terminal device 130 shown in Figure 1 .

[0069] In the communication system shown in (a) of Figure 1 , both the terminal device 120 and the terminal device 130 can be within the coverage of the cell service provided by the network device 110; in the communication system shown in (b) of Figure 1 , only one of the terminal devices can be within the coverage of the cell service provided by the network device 110, such as the terminal device 120; and in the communication system shown in (c) of Figure 1 , none of the terminal devices can be within the coverage of the cell service provided by the network device 110.

[0070] Network device 110 can communicate with terminal device 120 and terminal device 130 via a UU (UTRAN-to-UE) air interface through a wireless link, and terminal device 120 and terminal device 130 can directly communicate wirelessly via a PC5 air interface. Communication devices in this communication system, for example, network device 110 and terminal device 120 and terminal device 130, can communicate using multi-antenna technology.

[0071] As an example, a single network device may transmit data or control signaling to a single or multiple terminal devices, and / or multiple network devices may simultaneously transmit data or control signaling for a single terminal device.

[0072] Figure 2 is a schematic diagram of another communication system applicable to the method of an embodiment of the present application. As shown in Figure 2, the terminal device includes a processor 211, a memory 212, and a transceiver 213. The transceiver 213 includes a transmitter 2131, a receiver 2132, and an antenna 2133. The network device includes a processor 221, a memory 222, and a transceiver 223. The transceiver 223 includes a transmitter 2231, a receiver 2232, and an antenna 2233.

[0073] The processor 211 , the memory 212 , and the transceiver 213 communicate with each other through an internal connection path, and the processor 221 , the memory 222 , and the transceiver 223 communicate with each other through an internal connection path.

[0074] Receiver 2132 may be configured to receive transmission control information via antenna 2133, and transmitter 2131 may be configured to send transmission feedback information to a network device via antenna 2133. Transmitter 2231 may be configured to send transmission control information to a terminal device via antenna 2233, and receiver 2232 may be configured to receive transmission feedback information sent by the terminal device via antenna 2233.

[0075] It should be noted that Figures 1 and 2 are simplified schematic diagrams for ease of understanding. In actual applications, the communication system may include multiple network devices and multiple terminal devices. The embodiments of the present application do not limit the number of network devices and terminal devices included in the communication system.

[0076] Currently, in the CB-based uplink transmission of the MIMO system, the terminal sends a reference signal RS, and the network device measures the received RS and sends a transmission precoding matrix indicator TPMI to the terminal. The terminal sends an uplink data channel to the network device based on the PMI, where the PMI enables the uplink data channel to be mapped to the corresponding antenna port.

[0077] As the number of antennas in wireless network devices increases, more UEs can be connected. Therefore, in multi-user multiple-input multiple-output (MU-MIMO) scenarios, a high-precision uplink codebook is required. In addition, as bandwidth increases, the uplink also considers the subband precoding codebook, which increases the uplink codebook indication overhead.

[0078] An exemplary application scenario of the communication method of the present application is to indicate the precoding-related method to the UE through the network device in the uplink transmission based on CB of the MIMO system, thereby reducing the signaling overhead of the uplink precoding and improving the performance of the communication system.

[0079] The communication method proposed in this application will be described below in conjunction with specific embodiments. Figure 3 is a schematic flow chart of a communication method provided in one embodiment of this application. As shown in Figure 3, the method may include S310 and S320.

[0080] S310: The terminal device sends a reference signal to the network device. Correspondingly, the network device receives the reference signal.

[0081] As an example, the reference signal is used for uplink channel measurement, that is, the network device can perform uplink channel measurement based on the reference signal.

[0082] In some possible implementations, the terminal device may send a reference signal to the network device on multiple antenna ports.

[0083] As an example, the reference signal may be referred to as a pilot signal.

[0084] As an example, the reference signal may be a sounding reference signal (SRS).

[0085] S320: The network device sends first information to the terminal device. The first information is used to indicate a first interpolation method, which is used to interpolate a first precoding indicator. The first precoding indicator includes a precoding indicator corresponding to each subband in a first portion of subbands, where the first portion of subbands includes a portion of subbands in a bandwidth occupied by a reference signal. Accordingly, the terminal device receives the first information.

[0086] As an example, the first information may be carried in radio resource control (RRC) signaling, downlink control information (DCI), and medium access control-control element (MAC-CE) signaling.

[0087] It can be understood that the precoding indicator corresponding to the subband can be understood as the precoding indicator that needs to be used when sending information on the subband.

[0088] In some possible implementations, the precoding indicator in this embodiment may be a transmit precoding matrix indicator (TPMI).

[0089] As an example, the first information may include identification information of a first interpolation method and a first precoding indicator. That is, the network device instructs the terminal, through the first information, to use the first interpolation method to interpolate the first precoding indicator to obtain precoding indicators for other subbands in the bandwidth occupied by the reference signal, or in other words, to obtain precoding indicators for all subbands in the bandwidth occupied by the reference signal. The interpolation point represents the position of the subband to be interpolated, and the value obtained by interpolation at the interpolation point is the precoding indicator corresponding to the subband.

[0090] For example, as shown in FIG4 , the bandwidth occupied by the terminal in the frequency domain includes 12 sub-bands, and the first precoding indicator indicated by the network device to the terminal includes the precoding indicator of sub-band P0 and the precoding indicator of sub-band P1. The terminal can interpolate other sub-bands based on the indication of the first information, such as sub-band P t precoding indicator.

[0091] In some possible implementations, the first information may include an index of the first interpolation method among multiple interpolation methods, that is, the identification information of the first interpolation method is the index of the first interpolation method among the multiple interpolation methods.

[0092] In some possible implementations, when the first precoding indicator includes a precoding indicator corresponding to each subband in the first part of subbands.

[0093] As an example, the second information may indicate at least one of the following information: the number of resource blocks (RBs) occupied by each subband, which may also be referred to as subband precoding granularity; the position of each subband in the first part of the subbands in the bandwidth; the number of precoding indicators contained in the first precoding indicator, used to indicate the number of subband precoding interpolation points; the angular change between the precoding vectors indicated by the precoding indicators corresponding to the subbands in the bandwidth; or the distribution of the precoding indicators corresponding to the subbands in the bandwidth, used to indicate the distribution of the subband interpolation points.

[0094] In some possible implementations, the first information and the second information may be carried in the same message.

[0095] In some possible implementations, the first interpolation method may be a precoding method based on popular interpolation or a method based on linear interpolation.

[0096] It can be understood that the precoding method based on popular interpolation or the method based on linear interpolation is only an example. As long as the precoding indicator corresponding to some subbands can be restored to obtain the precoding indicator corresponding to other subbands to obtain the precoding indicator corresponding to all subbands, it should be included in the protection scope of the first interpolation method of this application.

[0097] When the first interpolation method is a precoding method based on popular interpolation or a method based on linear interpolation, in some possible implementations, the first precoding indicator may include precoding vectors corresponding to two subbands on the subband where the reference signal is located, and these two subbands can be respectively referred to as the first subband and the second subband, and the two precoding vectors can be respectively recorded as precoding vector P0 and precoding vector P1.

[0098] In some possible implementations, the first subband may be the first subband, or the first subband, among the subbands included in the bandwidth occupied by the reference signal, or the subband with the lowest frequency in the frequency domain. Optionally, the position of the first subband in the bandwidth occupied by the reference signal may be dynamically indicated by second information sent by the network device, or may be preconfigured. Accordingly, the terminal device receives the second information.

[0099] In some possible implementations, the second subband may be the last subband, or the end subband, of the subbands included in the bandwidth occupied by the reference signal, or the subband with the highest frequency in the frequency domain. Optionally, the position of the second subband in the bandwidth occupied by the reference signal may be dynamically indicated by second information or may be preconfigured. Accordingly, the terminal device receives the second information.

[0100] A first example of a manifold interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows: H P1=cos(θ)·e +jφ P t =P0·α(θ,φ,t)+P1·β(θ,φ,t)

[0101] Where θ is the spatial angle between the precoding vector P0 and the precoding vector P1, φ is the propagation rotation angle between the precoding vector P0 and the precoding vector P1, 0≤t≤1, P t Represents the precoding vector of the subband associated with t.

[0102] As an example, the value of t may be determined by the position of the subband to which t is associated.

[0103] For example, the bandwidth occupied by the reference signal includes 10 subbands, and the first part of the subbands includes the first subband and the last subband of the 10 subbands, that is, the two precoding indicators included in the first precoding indicator are the precoding indicator corresponding to the first subband and the precoding indicator corresponding to the last subband of the 10 subbands, respectively. Then t can have 10 values, the first value is 0, the second value is 1 / 9, the third value is 2 / 9..., and so on, the tenth value is 1.

[0104] It can be understood that one or more of θ, φ, α(θ, φ, t), β(θ, φ, t) in the first example above can be indicated to the terminal by the network device through the second information, or can be calculated by the terminal based on the above relationship or a variation of the above relationship.

[0105] A second example of the manifold interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows: H P1=cos(θ)·e +jφ

[0106] Where n is the number of interpolation points and Δθ is the interpolation parameter.

[0107] As an example, n can be determined based on the number of subbands included in the bandwidth occupied by the reference signal and / or the number of subbands included in the first portion of the bandwidth. For example, if the bandwidth occupied by the reference signal includes 10 subbands and the first portion of subbands includes the first and last subbands of these 10 subbands, the value of n can be 1, 1 / 9, 2 / 9, 3 / 9, ..., 1.

[0108] It can be understood that the θ in the second example relationship above is t The network device may indicate the terminal through the second information, or the terminal may calculate based on the above relationship or a variation of the above relationship.

[0109] It can be understood that Δθ in the above second example relationship may be indicated by the network device to the terminal through the second information.

[0110] A third example of the manifold interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows: H P1=cos(θ)·e +jφ

[0111] Among them, θ t The interpolation point distribution can be obtained or indicated based on the interpolation point distribution.

[0112] As an example, the interpolation point distribution is or θ t =f(t),0 <t<1。

[0113] It can be understood that the distribution of the above interpolation points can also be represented by a table.

[0114] The following describes the distribution characteristics of the interpolation points in the above three examples with reference to Figure 4. Figures 5(a) and 5(b) are schematic diagrams of the uniform and variable angle changes between precoding vectors, respectively, and Figure 5(c) is a schematic diagram of the distribution of interpolation points when n = 4 interpolation points are used for the variable angle change between precoding vectors.

[0115] As shown in FIG5(a), the angular variation between the precoding vector P0 and the precoding vector P1 is constant.

[0116] As shown in FIG5( b ), the angle variation between the precoding vector P0 and the precoding vector P1 is getting larger and larger.

[0117] As shown in (c) of FIG5 , the precoding vector P0 and the precoding vector P at the first interpolation point 1 / 4 The angle change between them is Δθ1=θ 1 / 4 ; Precoding vector P at the first interpolation point 1 / 4 and the precoding vector P at the second interpolation point 2 / 4 The angle change between Δθ2=θ 2 / 4 -θ 1 / 4 ; Precoding vector P at the second interpolation point 2 / 4 and the precoding vector P at the third interpolation point 3 / 4 The angle change between Δθ3 and θ 3 / 4 -θ 2 / 4 ; Precoding vector P at the third interpolation point 3 / 4 The angle change between the precoding vector P1 and Δθ4 = θ 4 / 4 -θ 3 / 4 .

[0118] A first example of a linear interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows: t =P0·t+P1·(1-t)

[0119] The relevant contents of each parameter can refer to the contents of the same parameters in the first example of the manifold interpolation relation, which will not be repeated here.

[0120] A second example of the linear interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows: t =P0·θ t +P1·(1-θ t )

[0121] The contents of each parameter may refer to the contents of the same parameters in the second example of the manifold interpolation relation, and will not be repeated here.

[0122] A third example of the linear interpolation relationship satisfied between the precoding vector P0 and the precoding vector P1 is as follows:

[0123] P t =P0·θ t +P1·(1-θ t )

[0124] The meaning of each parameter can refer to the same parameter in the third example of the manifold interpolation relation, and will not be repeated here.

[0125] As mentioned above, the interpolation method in this embodiment is not limited to the manifold interpolation method and the linear interpolation method. The following describes the distribution of interpolation points of the manifold interpolation method, the linear interpolation method and other exemplary interpolation methods with reference to FIG6 .

[0126] As shown in FIG6 , the top line represents the distribution diagram of manifold interpolation points, the middle line represents the distribution diagram of linear interpolation points, and the bottom line represents the distribution of interpolation points of other possible interpolation methods.

[0127] In this embodiment, after the terminal device receives the first information (or further receives the second information), it can obtain the precoding indicators corresponding to all subbands in the bandwidth occupied by the reference signal based on the interpolation method indicated by the first information, so that each subband of the terminal device can be precoded based on these precoding indicators to complete the transmission of the uplink signal.

[0128] In some possible implementations, the network device may indicate to the terminal a precoding indicator for each subband in the bandwidth occupied by the reference signal. In this implementation, the network device may also optionally send information to the terminal indicating that the precoding indicator sent by the network device uses a traditional method of providing precoding indications for each subband. In this implementation, the terminal may use the received precoding indicator for each subband to perform precoding on each subband to complete uplink signal transmission.

[0129] In some possible implementations, the terminal may send fourth information to the network device, where the fourth information indicates an interpolation method supported by the terminal. Alternatively, the fourth information may indicate the precoding computing capability of the terminal, such as whether the terminal is capable of precoding based on a popular interpolation method.

[0130] In this implementation, the first interpolation method indicated by the network device may be determined based on the precoding computing capability reported by the terminal.

[0131] For example, if the terminal supports the manifold interpolation method, the first interpolation method indicated by the network device may be the manifold interpolation method.

[0132] For another example, if the terminal does not support the manifold interpolation method but supports the linear interpolation method, the first interpolation method indicated by the network device may be the linear interpolation method.

[0133] For another example, if the terminal does not support the manifold interpolation method and the linear interpolation method, the network device can indicate the traditional method of performing precoding indication for each subband. In this case, the network device sends a precoding indicator for each subband to the terminal.

[0134] In the above embodiment, the low-overhead MIMO uplink high-precision subband TPMI indication method based on partial subband PMI indication, interpolation method indication and interpolation method related parameters greatly reduces the signaling overhead of uplink precoding, thereby improving communication performance.

[0135] The method of the above embodiment can be called a frequency domain interpolation method. The interpolation concept of the precoding indicator of the present application can also be used in the spatial domain, that is, for antenna ports.

[0136] One difference between the embodiment of the interpolation idea of ​​the precoding indicator of the present application when used in the spatial domain and the embodiment shown in Figure 3 is as follows: the first precoding indicator includes a precoding indicator corresponding to each antenna port in the first part of antenna ports, and the first part of antenna ports includes some antenna ports among the antenna ports occupied by the reference signal.

[0137] For example, as shown in FIG7 , the number of antenna ports occupied by the terminal in the airspace is 16, and the first precoding indicator indicated by the network device to the terminal includes the precoding indicator of antenna port P0 and the precoding indicator of antenna port P1. The terminal can interpolate other antenna ports based on the indication of the first information, such as antenna port P t precoding indicator.

[0138] Another difference between the embodiment of the present application in which the interpolation concept of the precoding indicator is applied to the spatial domain and the embodiment shown in FIG3 is as follows: the second information sent by the network device to the terminal device can be replaced by the third information.

[0139] As an example, the third information may indicate at least one of the following information: the number of antennas contained in each antenna port, which may also be referred to as spatial precoding granularity; the position of each antenna port in the first part of the antenna ports in the antenna ports occupied by the reference signal; the number of precoding indicators contained in the first precoding indicator, used to indicate the number of spatial precoding interpolation points; the angular change between the precoding vectors indicated by the precoding indicators corresponding to the antenna ports occupied by the reference signal, or the distribution of the precoding indicators corresponding to the antenna ports in the antenna ports occupied by the reference signal, used to indicate the distribution of the spatial interpolation points.

[0140] It can be understood that other contents of the embodiment in which the interpolation idea of ​​the precoding indicator of the present application is applied to the spatial domain can refer to the corresponding contents in the embodiment shown in Figure 3. For example, the subband in the embodiment shown in Figure 3 can be replaced by antenna ports.

[0141] The content of the aforementioned embodiment is as follows: the terminal sends a reference signal to the network device, the network device measures the received reference signal, and feeds back to the terminal the precoding indicators corresponding to some subbands or some antenna ports, as well as an indication interpolation method, so that the terminal recovers the precoding indicators corresponding to the subbands within the entire bandwidth. It can be understood that exchanging the terminal and the network device in the aforementioned content, for example, the network device sends a reference signal to the terminal, the terminal measures the received reference signal, feeds back to the network the precoding indicators corresponding to some subbands or some antenna ports (or even an indication interpolation method), and the network recovers the precoding indicators corresponding to the subbands within the entire bandwidth, also falls within the scope of the inventive concept of this application.

[0142] FIG8 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. As shown in FIG8 , the device 800 may include a processing module 801 and a communication module 802 .

[0143] As a first example, the apparatus 800 can be used to implement the communication method implemented by a terminal in any of the embodiments shown in Figure 3. For example, the processing module 801 is used to implement the processing-related steps performed by the terminal device in any of the embodiments shown in Figure 3, and the communication module 802 is used to implement the sending and / or receiving steps performed by the terminal device in any of the embodiments shown in Figure 3.

[0144] As a second example, the apparatus 800 can be used to implement the communication method implemented by the network device in any of the embodiments shown in Figure 3. For example, the processing module 801 is used to implement the processing-related steps performed by the network device in any of the embodiments shown in Figure 3, and the communication module 802 is used to implement the sending and / or receiving steps performed by the network device in any of the embodiments shown in Figure 3.

[0145] Figure 9 is a schematic diagram of the structure of a communication device provided in another embodiment of the present application. As shown in Figure 9, the device 900 includes a processor 901 and a communication circuit 902. The processor 901 and the communication circuit 902 are coupled to each other. It is understood that the communication circuit 902 can be a transceiver or an input / output interface. Optionally, the device 900 may also include a memory 903 for storing instructions executed by the processor 901 or storing input data required by the processor 901 to run the instructions or storing data generated after the processor 901 runs the instructions. It is understood that the memory 903 can be located outside the processor 901, or inside the processor 901.

[0146] As an example, the processor 901 is used to implement the functions of the above-mentioned processing module 801, and the communication circuit 902 is used to implement the functions of the above-mentioned communication module 802.

[0147] The apparatus 900 may be a communication device or a chip used in a communication device. For example, the apparatus 900 may be a UE or a chip used in a UE, or a network device or a chip used in a network device. It is understood that when the apparatus 900 is a UE or a network device, the communication circuit 602 may be a transceiver.

[0148] In some embodiments of the present application, a computer program product is also provided. When the computer program product is run on a processor, it can implement the method implemented by the terminal device in any of the above embodiments, or it can implement the method implemented by the network device in any of the above method embodiments.

[0149] In some embodiments of the present application, a computer-readable storage medium is also provided, which includes computer instructions. When the computer instructions are executed on a processor, the method implemented by the terminal device in any of the above embodiments can be implemented, or the method implemented by the network device in any of the above method embodiments can be implemented.

[0150] In some embodiments of the present application, a communication system is also provided, which can implement the method implemented by the terminal device and the network device in any of the above embodiments.

[0151] It is understood that the processor in the embodiments of the present application can be the following devices or all or part of the circuits in the following devices for processing functions: a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0152] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and the storage medium can also be present in a network device or a terminal device as discrete components.

[0153] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive.

[0154] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0155] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: Applied to a terminal, the method comprises: Sending a reference signal; Receiving first information from a network device, the first information indicating a first interpolation method, the first interpolation method being used to perform interpolation processing on a first precoding indicator; The first precoding indicator includes a precoding indicator corresponding to each subband in a first part of subbands, the first part of subbands includes a part of subbands in a bandwidth occupied by the reference signal, or the first precoding indicator includes a precoding indicator corresponding to each antenna port in a first part of antenna ports, and the first part of antenna ports includes a part of antenna ports occupied by the reference signal.

2. The method according to claim 1, characterized in that The first interpolation method is a popular interpolation method.

3. The method according to claim 1 or 2, characterized in that: When the first precoding indicator includes a precoding indicator corresponding to each subband in the first part of subbands, the method further includes: Receive second information from the network device, where the second information indicates at least one of the following information: the number of resource blocks (RBs) occupied by each subband, the position of each subband in the first part of subbands in the bandwidth, the number of precoding indicators contained in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the subbands in the bandwidth, or the distribution of the precoding indicators corresponding to the subbands in the bandwidth.

4. The method according to any one of claims 1 to 3, characterized in that When the first precoding indicator includes a precoding indicator corresponding to each antenna port in the first part of antenna ports, the method further includes: Receive third information from the network device, where the third information indicates at least one of the following information: the number of antennas included in each antenna port, the position of each antenna port in the first part of antenna ports in the antenna ports occupied by the reference signal, the number of precoding indicators included in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the antenna ports occupied by the reference signal, or the distribution of the precoding indicators corresponding to the antenna ports in the antenna ports occupied by the reference signal.

5. The method according to claim 3 or 4, characterized in that: The second information indicating the angle change includes: the second information indicating an index of the angle change.

6. The method according to any one of claims 3 to 5, characterized in that The second information indicating the distribution condition includes: the second information indicating an index of the distribution condition.

7. The method according to any one of claims 1 to 6, characterized in that The first information indicates a first interpolation method, including: the first information indicates an index of the first interpolation method among multiple interpolation methods.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: Sending fourth information to the network device, where the fourth information indicates an interpolation method supported by the terminal.

9. A communication method, characterized in that: Applied to a network device, the method comprises: receiving a reference signal from a terminal device; Sending first information, where the first information indicates a first interpolation method, and the first interpolation method is used to perform interpolation processing on a first precoding indicator; The first precoding indicator includes a precoding indicator corresponding to each subband in a first part of subbands, the first part of subbands includes a part of subbands in a bandwidth occupied by the reference signal, or the first precoding indicator includes a precoding indicator corresponding to each antenna port in a first part of antenna ports, and the first part of antenna ports includes a part of antenna ports occupied by the reference signal.

10. The method according to claim 9, characterized in that The first interpolation method is a popular interpolation method.

11. The method according to claim 9 or 10, characterized in that: When the first precoding indicator includes a precoding indicator corresponding to each subband in the first part of subbands, the method further includes: Send second information, where the second information indicates at least one of the following information: the number of resource blocks (RBs) occupied by each subband, the position of each subband in the first part of the subbands in the bandwidth, the number of precoding indicators contained in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the subbands in the bandwidth, or the distribution of the precoding indicators corresponding to the subbands in the bandwidth.

12. The method according to any one of claims 9 to 11, characterized in that When the first precoding indicator includes a precoding indicator corresponding to each antenna port in the first part of antenna ports, the method further includes: Send third information, wherein the third information indicates at least one of the following information: the number of antennas included in each antenna port, the position of each antenna port in the first part of antenna ports in the antenna port occupied by the reference signal, the number of precoding indicators included in the first precoding indicator, the angle change between the precoding vectors indicated by the precoding indicators corresponding to the antenna ports occupied by the reference signal, or the distribution of the precoding indicators corresponding to the antenna ports in the antenna ports occupied by the reference signal.

13. The method according to claim 11 or 12, characterized in that: The second information indicating the angle change includes: the second information indicating an index of the angle change.

14. The method according to any one of claims 11 to 13, characterized in that The second information indicating the distribution condition includes: the second information indicating an index of the distribution condition.

15. The method according to any one of claims 9 to 14, characterized in that The first information indicates a first interpolation method, including: the first information indicates an index of the first interpolation method among multiple interpolation methods.

16. The method according to any one of claims 9 to 15, characterized in that The method further comprises: Fourth information is received from a terminal device, where the fourth information indicates an interpolation method supported by the terminal.

17. A communication device, characterized in that: The method comprises a functional module for implementing the method according to any one of claims 1 to 16.

18. A communication device, characterized in that: include: Memory and processor; The memory is used to store program instructions; The processor is configured to execute program instructions in the memory to implement the method according to any one of claims 1 to 16.

19. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program code for computer execution, wherein the program code includes instructions for implementing the method according to any one of claims 1 to 16.

20. A computer program product, characterized in that The computer program product comprises instructions for implementing the communication method according to any one of claims 1 to 16.

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