Communication method and related apparatus

Abstract

The present application is applied to the technical field of communications. Provided are a communication method and a communication apparatus. In a technical solution provided in the present application, a terminal receives first information, wherein the first information is used for configuring a first resource; the terminal receives a reference signal on the first resource, wherein the first resource supports M1 antenna ports, M1 being a positive integer; and the terminal receives second information, wherein the second information indicates that channel estimation results of the M1 antenna ports are used for determining first channel estimation results, the first channel estimation results being channel estimation results of first antenna ports, and the M1 antenna ports being some of the first antenna ports. According to the present application, by means of combining and splicing channels corresponding to CSI-RS resources, feedback overheads of CSI can be reduced.

Description

Communication method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 8, 2024, with application number 202410037204.6 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] A multiple-input, multiple-output (MIMO) system uses multiple antennas at both the transmitter and receiver ends, creating multiple channels between the transmitter and receiver. To send and receive data, a MIMO system requires channel estimation.

[0004] With the development of communication technology, in order to further improve the capacity and spectrum efficiency of communication systems, the number of antenna ports in MIMO systems is increasing. For example, a massive MIMO system has been proposed.

[0005] To support the dynamically changing number of antenna ports in a massive MIMO system, network equipment requires a flexible channel measurement resource configuration method with low signaling overhead. Summary of the Invention

[0006] The present application provides a communication method and related devices, which can implement channel estimation in a MIMO system, thereby improving communication performance.

[0007] In a first aspect, the present application provides a communication method and related apparatus, the method being used for a terminal device. The method comprises: receiving first information, the first information being used to configure a first resource on which the terminal device receives a reference signal, the first resource supporting M1 antenna ports, where M1 is a positive integer; and receiving second information, the second information indicating that channel estimation results of the M1 antenna ports are used to determine a first channel estimation result, the first channel estimation result being a channel estimation result of the first antenna port, the M1 antenna ports being some of the first antenna ports.

[0008] In some possible implementations, the reference signal may be a CSI-RS, and the first resource is a CSI-RS resource.

[0009] The first information and the second information may be carried in the same message or the same signaling, or may be carried in different messages or different signaling.

[0010] The channel estimation result in this method may be a channel measurement value obtained by least squares estimation, or a channel estimation value obtained by interpolating and filtering the channel measurement value, or a precoding indicator obtained after further processing the channel estimation value.

[0011] In this method, the terminal device receives a reference signal at the corresponding antenna port according to the first resource indicated by the network device, and determines the first channel estimation result by determining the channel estimation results of some antenna ports in the first antenna port.

[0012] In some possible implementations, the method further includes: sending third information in response to the second information, the third information including channel estimation results of P1 antenna ports among the M1 antenna ports, where P1 is a positive integer less than or equal to M1.

[0013] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0014] In some possible implementations, the third information further includes the second information.

[0015] In this implementation, the network device learns through the third information that the indicated channel estimation result is used to determine the first channel estimation result.

[0016] In some possible implementations, the method also includes: receiving fourth information, the fourth information is used to configure a second resource, the second resource is used to send a reference signal, the second resource supports M2 antenna ports, M2 is a positive integer; receiving fifth information, the fifth information indicates that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, and the first antenna port also includes all or part of the M2 antenna ports.

[0017] The fourth information and the fifth information in this method may be carried in the same message or the same signaling, or may be carried in different messages or different signaling.

[0018] In this method, the terminal device receives a reference signal at the corresponding antenna port according to the second resource indicated by the network device, and determines the first channel estimation result by determining the channel estimation results of some antenna ports in the first antenna port.

[0019] In this implementation, as an example, the method may also include: sending sixth information in response to the fifth information, the sixth information including the channel estimation results of P2 antenna ports among the M2 antenna ports, where P2 is a positive integer less than or equal to M2; wherein the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

[0020] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0021] In this method, when the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information, the channel estimation result of the antenna port corresponding to the first resource and the channel estimation result of the antenna port corresponding to the second resource can be spliced.

[0022] In this implementation, as another example, the method further includes: sending seventh information, where the seventh information indicates the first channel estimation result.

[0023] In this method, the terminal device can reduce CSI feedback overhead by feeding back the first channel estimation result.

[0024] In some possible implementations, the first channel estimation result includes a first sub-channel estimation result and a second sub-channel estimation result, where the first sub-channel estimation result is the channel estimation result of the M1 antenna ports, and the second sub-channel estimation result is the channel estimation result of the M2 antenna ports, where M2 is a positive integer.

[0025] In some possible implementations, the ordering relationship between the first subchannel estimation result and the second subchannel estimation result in the first channel estimation result is the same as the ordering relationship between the first resource and the second resource, the second resource is used to send a reference signal and the second resource supports the M2 antenna ports, and the ordering relationship between the first resource and the second resource is predefined or configured by the second communication device for the first communication device.

[0026] In some possible implementations, the first channel estimation result includes a first sub-channel estimation result and a third sub-channel estimation result, the first sub-channel estimation result is the channel estimation result of the M1 antenna ports, the third sub-channel estimation result includes the channel estimation results of the L antenna ports, the channel estimation result of each of the L antenna ports is determined based on the channel estimation result of each antenna port included in the second channel estimation result and a first reference difference, the second sub-channel estimation result is the channel estimation result of the M2 antenna ports, M2 is a positive integer, the first reference difference is the difference between the channel estimation result of the reference port included in the first sub-channel estimation result and the channel estimation result of the reference port included in the second sub-channel estimation result, the reference port is predefined or configured by the second communication device for the first communication device, and L is a positive integer less than M2.

[0027] In some possible implementations, the second information includes a first identifier, where the first identifier is an identifier of a first channel estimation result group, the first channel estimation result group includes at least one channel estimation result, and the channel estimation results in the first channel estimation result group are used to splice the first channel estimation result.

[0028] In this method, the network device recovers the first channel estimation results on all resources corresponding to the first antenna port by splicing.

[0029] In some possible implementations, the method also includes: receiving eighth information, the eighth information is used to configure a third resource, the third resource is used to send a reference signal, the third resource supports M3 antenna ports, and M3 is a positive integer; receiving ninth information, the ninth information indicates that the channel estimation results of the M3 antenna ports are used to determine the first channel estimation result, and the first antenna port also includes all or part of the M3 antenna ports; receiving a first reference signal based on the first resource; receiving a second reference signal based on the third resource; wherein the delayed digital automatic gain control DAGC configuration used to receive the first reference signal is the same as the DACG configuration used to receive the second reference signal.

[0030] In some possible implementations, the method also includes: sending tenth information, wherein the tenth information indicates capabilities supported by the first communication device, and the supported capabilities include at least one of the following capabilities: supporting splicing of channel estimation results, the maximum number of spliced ​​antenna ports, the time span of resources corresponding to the spliced ​​antenna ports, the number of spliced ​​antenna port groups, the reason for supporting splicing, or the scenario for supporting splicing.

[0031] In this method, the network device can send corresponding CSI-RS resources to the terminal according to the capability information reported by the terminal.

[0032] In a second aspect, the present application provides a communication method for a network device. The method includes: sending first information, the first information being used to configure a first resource, the first resource being used to send a reference signal, the first resource supporting M1 antenna ports, where M1 is a positive integer; and sending second information, the second information indicating that channel estimation results of the M1 antenna ports are used to determine a first channel estimation result, the first channel estimation result being a channel estimation result of the first antenna port, the M1 antenna ports being some of the first antenna ports.

[0033] In this method, the network device indicates a first resource to the terminal device, sends a reference signal at the corresponding antenna port, and determines the first channel estimation result by determining the channel estimation results of some antenna ports in the first antenna port.

[0034] In some possible implementations, the method further includes: receiving third information, where the third information includes channel estimation results of P1 antenna ports among the M1 antenna ports, where P1 is a positive integer less than or equal to M1.

[0035] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0036] In some possible implementations, the third information further includes the second information.

[0037] In this implementation, the network device learns through the third information that the indicated channel estimation result is used to determine the first channel estimation result.

[0038] In some possible implementations, the method also includes: sending fourth information, wherein the fourth information is used to configure a second resource, the second resource is used to send a reference signal, the second resource supports M2 antenna ports, and M2 is a positive integer; and sending fifth information, wherein the fifth information indicates that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, and the first antenna port also includes all or part of the antenna ports of the M2 antenna ports.

[0039] In this method, the network device indicates the second resource to the terminal device, sends a reference signal at the corresponding antenna port, and determines the first channel estimation result by determining the channel estimation results of some antenna ports in the first antenna port.

[0040] In this implementation, as an example, the method may also include: receiving sixth information from the first communication device, the sixth information including channel estimation results of P2 antenna ports among the M2 antenna ports, where P2 is a positive integer less than or equal to M2; wherein the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

[0041] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0042] In this method, when the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information, the channel estimation result of the antenna port corresponding to the first resource and the channel estimation result of the antenna port corresponding to the second resource can be spliced.

[0043] In some possible implementations, the method further includes: receiving seventh information, where the seventh information indicates the first channel estimation result.

[0044] In this method, the terminal device can reduce CSI feedback overhead by feeding back the first channel estimation result.

[0045] In some possible implementations, the first channel estimation result includes a first sub-channel estimation result and a second sub-channel estimation result, where the first sub-channel estimation result is the channel estimation result of the M1 antenna ports, and the second sub-channel estimation result is the channel estimation result of the M2 antenna ports, where M2 is a positive integer.

[0046] In some possible implementations, the ordering relationship between the first subchannel estimation result and the second subchannel estimation result in the first channel estimation result is the same as the ordering relationship between the first resource and the second resource, the second resource is used to send a reference signal and the second resource supports the M2 antenna ports, and the ordering relationship between the first resource and the second resource is predefined or configured by the second communication device for the first communication device.

[0047] In some possible implementations, the first channel estimation result includes a first sub-channel estimation result and a third sub-channel estimation result, the first sub-channel estimation result is the channel estimation result of the M1 antenna ports, the third sub-channel estimation result includes the channel estimation results of the L antenna ports, the channel estimation result of each of the L antenna ports is determined based on the channel estimation result of each antenna port included in the second channel estimation result and a first reference difference, the second sub-channel estimation result is the channel estimation result of the M2 antenna ports, M2 is a positive integer, the first reference difference is the difference between the channel estimation result of the reference port included in the first sub-channel estimation result and the channel estimation result of the reference port included in the second sub-channel estimation result, the reference port is predefined or configured by the second communication device for the first communication device, and L is a positive integer less than M2.

[0048] In some possible implementations, the second information includes a first identifier, where the first identifier is an identifier of a first channel estimation result group, the first channel estimation result group includes at least one channel estimation result, and the channel estimation results in the first channel estimation result group are used to splice the first channel estimation result.

[0049] In some possible implementations, the method also includes: receiving eighth information, the eighth information is used to configure a third resource, the third resource is used to send a reference signal, the third resource supports M3 antenna ports, and M3 is a positive integer; receiving ninth information, the ninth information indicates that the channel estimation results of the M3 antenna ports are used to determine the first channel estimation result, and the first antenna port also includes all or part of the M3 antenna ports; receiving a first reference signal based on the first resource; receiving a second reference signal based on the third resource; wherein the digital automatic gain control DAGC configuration used to receive the first reference signal is the same as the DACG configuration used to receive the second reference signal.

[0050] In some possible implementations, the method also includes: sending tenth information, wherein the tenth information indicates capabilities supported by the first communication device, and the supported capabilities include at least one of the following capabilities: supporting splicing of channel estimation results, the maximum number of spliced ​​antenna ports, the time span of resources corresponding to the spliced ​​antenna ports, the number of spliced ​​antenna port groups, the reason for supporting splicing, or the scenario for supporting splicing.

[0051] In a third aspect, the present application provides a communication device. The communication device may include a module corresponding to each of the methods / operations / steps / actions described in the first aspect, and the module may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0052] In one design, the apparatus may include a processing module and a communication module. The communication module is configured to perform the sending and receiving actions performed by the communication node in the method described in the first aspect above, and the processing module is configured to perform the processing-related actions performed by the communication node in the method described in the first aspect above.

[0053] In one design, the device may be a terminal device, or a device, module, circuit or chip configured and arranged in the terminal device, or a device that can be used in conjunction with the terminal device.

[0054] In a fourth aspect, the present application provides a communication device. The communication device may include a module corresponding to each of the methods / operations / steps / actions described in the second aspect, and the module may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0055] In one design, the apparatus may include a processing module and a communication module. The communication module is configured to perform the sending and receiving actions performed by the first communication node in the method described in the second aspect above, and the processing module is configured to perform the processing-related actions performed by the first communication node in the method described in the second aspect above.

[0056] In one design, the device may be a network device, or a device, module, circuit or chip configured and arranged in the network device, or a device that can be used in conjunction with the network device.

[0057] In a fifth aspect, a device is provided, comprising a processor and a storage medium, wherein the storage medium stores instructions, and when the instructions are executed by the processor, the method in the first aspect or any possible implementation of the first aspect is implemented.

[0058] In a sixth aspect, a device is provided, comprising a processor and a storage medium, wherein the storage medium stores instructions, which, when executed by the processor, implement or cause the method in the second aspect or any possible implementation of the second aspect to be implemented.

[0059] In a seventh aspect, a device is provided, comprising a processor, wherein the processor is configured to process data and / or information so that the method according to the first aspect or any possible implementation manner of the first aspect is implemented.

[0060] In one design, the device may be a terminal device, or a device, module, circuit or chip configured and arranged in the terminal device, or a device that can be used in conjunction with the terminal device.

[0061] Optionally, the device may further include a memory, the memory being used to store programs or instructions, and the processor being used to run the programs or instructions so that the method in the first aspect or any possible implementation manner of the first aspect is implemented.

[0062] Optionally, the device may further include the transceiver circuit, or an input / output interface.

[0063] In an eighth aspect, a device is provided, comprising a processor, wherein the processor is configured to process data and / or information so that the method in the second aspect or any possible implementation manner of the second aspect is implemented.

[0064] In one design, the device may be a network device, or a device, module, circuit or chip configured and arranged in the network device, or a device that can be used in conjunction with the network device.

[0065] Optionally, the device may further include a memory, the memory being used to store programs or instructions, and the processor being used to run the programs or instructions so that the method in the second aspect or any possible implementation manner of the second aspect is implemented.

[0066] Optionally, the device may further include the transceiver circuit, or an input / output interface.

[0067] In the ninth aspect, a chip is provided, comprising a processor, wherein the processor is used to run a program or instruction so that the method in the first aspect or any possible implementation of the first aspect is implemented, or the method in the second aspect or any possible implementation of the second aspect is implemented.

[0068] Optionally, the chip may further include a memory for storing programs or instructions. Optionally, the chip may further include the transceiver circuit, or an input / output interface.

[0069] In the tenth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes instructions, which, when executed by a processor, enable the method in the first aspect or any possible implementation of the first aspect to be implemented, or enable the method in the second aspect or any possible implementation of the second aspect to be implemented.

[0070] In the eleventh aspect, a computer program product is provided, which includes computer program code or instructions. When the computer program code or instructions are executed, the method in the first aspect or any possible implementation of the first aspect is implemented, or the method in the second aspect or any possible implementation of the second aspect is implemented.

[0071] In the twelfth aspect, a communication system is provided, which includes a combination of one or more of the following devices: a communication device that executes the first aspect or any possible implementation of the first aspect, or a communication device that executes the second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] FIG1 is a schematic diagram of a communication system applicable to the method of an embodiment of the present application;

[0073] FIG2 is a schematic diagram of another communication system applicable to the method of an embodiment of the present application;

[0074] FIG3 is a schematic flow chart of a communication method provided in one embodiment of the present application;

[0075] FIG4 is a schematic diagram of channel splicing provided by an embodiment of the present application;

[0076] FIG5 is a schematic diagram of obtaining channel estimation auxiliary information;

[0077] FIG6 is a schematic diagram of a splicing time span supported by a terminal device;

[0078] FIG7 is a schematic flow chart of a communication method provided in another embodiment of the present application;

[0079] FIG8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0080] FIG9 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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).

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] For example, when the technical solution of the embodiment of the present application is applied to the universal mobile telecommunications system (UMTS), LTE communication system, NR communication system or 6G communication system, the network device may be a traditional macro base station; in a heterogeneous network (HetNet) scenario, the network device may be a micro base station; in a distributed base station scenario, the network device may be a baseband processing unit and a radio frequency unit; in a cloud radio access network (CRAN) scenario, the network device may be a baseband pool and a radio frequency unit; in future wireless communication systems, the network device may be a gNB.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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 .

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] In a MIMO system, channel estimation is required to send and receive data. The system defines a channel state information reference signal (CSI-RS), which is used to measure the downlink channel corresponding to the physical antenna port. The receiver performs channel estimation for each antenna port transmitted by the base station and provides CSI feedback for the channel estimation results.

[0111] With the advancement of communication technology, massive MIMO systems have been proposed to further improve the capacity and spectral efficiency of communication systems. Increasing the number of CSI-RS ports is one of the key technical paths to achieving massive MIMO. However, achieving a higher number of CSI-RS ports (e.g., 128, 256, 512, 1024, etc.) results in a significant increase in overhead.

[0112] An exemplary application scenario of the communication method of the present application is a massive MIMO system. The communication method proposed in the present application combines and splices multiple groups of channel estimation results corresponding to multiple CSI-RS resources to obtain channel estimation results for a greater number of antenna ports.

[0113] 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.

[0114] S310: A network device sends first information to a terminal device, where the first information is used to configure a first resource, where the first resource is used to send a reference signal, and where the first resource supports M1 antenna ports, where M1 is a positive integer. Accordingly, the terminal device receives the first information.

[0115] In this embodiment, the network device sends first information to the terminal device, the first information is used to configure a first resource, and the first resource is used to send a reference signal. It can be understood that: the network device configures resources for sending reference signals to the terminal device, or, in other words, the network device configures resources for sending reference signals for estimating channel states to the terminal device.

[0116] It can be understood that the reference signal in this embodiment can also be called a pilot signal.

[0117] As an example, the reference signal may be a CSI-RS, and accordingly, the first resource is a CSI-RS resource.

[0118] It can be understood that the antenna port supported by the first resource is the antenna port of the network device.

[0119] As an example, M1 may be equal to 1, or M1 may be an integer greater than 1.

[0120] As an example, M1=64, indicating that the first resource supports 64 antenna ports.

[0121] For ease of description, the first resource may be referred to as #1 CSI-RS resource.

[0122] It can be understood that there is a mapping relationship between each antenna port in the M1 antenna ports and the time-frequency resources included in the first resources, and the mapping relationship determines the time-frequency resources that can be used when sending a reference signal on each antenna port.

[0123] S320: The network device sends second information to the terminal device, where the second information indicates that the channel estimation results of the M1 antenna ports are used to determine a first channel estimation result, where the first channel estimation result is a channel estimation result of the first antenna port, and the M1 antenna ports are some of the first antenna ports. Accordingly, the terminal device receives the second information.

[0124] It can be understood that the first antenna port may be all or part of the antenna ports of the network device.

[0125] In this embodiment, the second information indicates that the channel estimation results of the M1 antenna ports are used to determine the first channel estimation result, the first channel estimation result is the channel estimation result of the first antenna port, and the M1 antenna ports are part of the first antenna port. It can be understood that: the second information indicates that the channel estimation results of the M1 antenna ports can be used to determine the channel estimation results of more antenna ports including the M1 antenna ports.

[0126] In some implementations, the channel estimation results of M1 antenna ports are used to determine the first channel estimation result, which can also be understood as: the channel estimation results of M1 antenna ports are used to splice or combine the channel estimation results of more antenna ports including the M1 antenna ports.

[0127] In some implementations, the first information and the second information may be carried in the same message or signaling. In other implementations, the first information and the second information may be carried in different messages or signaling, where the difference may include a different type or different transmission resources.

[0128] For the convenience of description, the channel estimation results of M1 antenna ports can be recorded as the first sub-channel estimation results.

[0129] In this embodiment, because the second information is associated with M1 antenna ports, and the M1 antenna ports are also associated with the first resource, the second information can be referred to as second information associated with the first resource. In addition, the M1 antenna ports are associated with the first subchannel estimation result, so the first resource can also be referred to as being associated with the first subchannel estimation result. In some possible implementations, the second information can include at least one identification document (ID) information, which is used to identify the resources associated with the channel estimation results that can be used to splice or combine the same group of channel estimation results. In other words, the identification information included in multiple information is the same, indicating that the channel estimation results obtained by estimating the reference signals sent by the multiple resources associated with the multiple information can be used to splice or combine the same channel estimation result.

[0130] As an example, the ID value is recorded as k1, and k1 can be any integer between 0 and 255.

[0131] It can be understood that the identification information in the second information can also be called identification information of the resource group.

[0132] When the identification information in the second information is called the identification information of the resource group, it can be understood that: when the network device configures resources for sending reference signals for the terminal device, the second information is used to indicate the resource group to which the resources belong, and the channel estimation results corresponding to this group of resources can be used to splice or combine to obtain channel estimation results of more antenna ports including the antenna ports corresponding to this group of resources.

[0133] In this embodiment, the channel estimation result of the antenna port may include: a channel matrix corresponding to the antenna port, a precoding indicator corresponding to the antenna port, or a precoding vector corresponding to the antenna port.

[0134] Optionally, in the communication method of this embodiment, after the network device configures the first resource and indicates the second information to the terminal device, the method may further include S330, that is, the network device sends a first reference signal based on the first resource. Correspondingly, the terminal device receives the first reference signal based on the first resource.

[0135] It can be understood that the first reference signal refers to a reference signal sent on the first resource.

[0136] As an example, all or part of the M1 antenna ports of the network device send reference signals on time-frequency resources having a mapping relationship in the first resources.

[0137] Optionally, the communication method of this embodiment may further include S340.

[0138] S340: The terminal device sends third information to the network device, where the third information includes a first sub-channel estimation result, where the first sub-channel estimation result is a channel estimation result based on the reference signal received from the first resource. Accordingly, the network device receives the third information.

[0139] In some implementations, the terminal device feeds back the channel estimation result for the antenna port to the network device based on an indication of the second information. In other words, the terminal device explicitly feeds back the channel estimation result for the antenna port to the network device when it determines that the second information has been received, rather than feeding back other forms of results.

[0140] In some implementations, the third information may further include second information indicating that the first sub-channel estimation result is a channel estimation result for splicing or combining.

[0141] Optionally, the communication method of this embodiment may further include S350 and S360.

[0142] S350: The network device sends fourth information to the terminal device, where the fourth information is used to configure a second resource, where the second resource is used to send a reference signal, and where the second resource supports M2 antenna ports, where M2 is a positive integer. Accordingly, the terminal device receives the fourth information.

[0143] In this embodiment, the network device sends fourth information to the terminal device, and the fourth information is used to configure the second resource, and the second resource is used to send a reference signal. It can also be understood that: the network device configures the resources for sending the reference signal to the terminal device, or, in other words, the network device configures the resources for sending the reference signal for estimating the channel state to the terminal device.

[0144] As an example, the reference signal may be a CSI-RS, and accordingly, the second resource is a CSI-RS resource.

[0145] It can be understood that the antenna port supported by the second resource is the antenna port of the network device.

[0146] As an example, M2 may be equal to 1, or M2 may be an integer greater than 1.

[0147] As an example, M2=128, indicating that the second resource supports 128 antenna ports.

[0148] For ease of description, the second resource may be referred to as #2 CSI-RS resource.

[0149] It can be understood that there is a mapping relationship between each antenna port in the M2 antenna ports and the time-frequency resources included in the second resources, and the mapping relationship determines the time-frequency resources that can be used when sending a reference signal on each antenna port.

[0150] S360: The network device sends fifth information to the terminal device, where the fifth information indicates that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, where the M2 antenna ports are part of the first antenna ports. Accordingly, the terminal device receives the fifth information.

[0151] In this embodiment, the fifth information indicates that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, the first channel estimation result is the channel estimation result of the first antenna port, and the M2 antenna ports are some of the first antenna ports. It can be understood that: the fifth information indicates that the channel estimation results of the M2 antenna ports can be used to determine the channel estimation results of more antenna ports including the M2 antenna ports.

[0152] In some implementations, the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, which can also be understood as: the channel estimation results of the M2 antenna ports are used to splice or combine the channel estimation results of more antenna ports including the M2 antenna ports.

[0153] In some implementations, the fourth information and the fifth information may be carried in the same message or signaling. In other implementations, the fourth information and the fifth information may be carried in different messages or signaling, where the difference may include different types or different transmission resources.

[0154] For the convenience of description, the channel estimation results of the M2 antenna ports can be recorded as the second sub-channel estimation results.

[0155] In this embodiment, because the fifth information is associated with the M2 antenna ports, which are also associated with the second resource, the fifth information can be referred to as fifth information associated with the second resource. Furthermore, because the M2 antenna ports are associated with the second subchannel estimation result, the second resource can also be referred to as being associated with the second subchannel estimation result.

[0156] In some possible implementations, the fifth information may include at least one piece of identification information, where the identification information is used to identify resources associated with channel estimation results that can be used to concatenate or combine the same set of channel estimation results. In other words, the same identification information included in multiple pieces of information indicates that channel estimation results obtained by estimating reference signals sent by multiple resources associated with the multiple pieces of information can be used to concatenate or combine the same channel estimation result.

[0157] For example, if the identification information in the second information is the same as the identification information in the fifth information, it means that the first sub-channel estimation result and the second sub-channel estimation result can be used together to concatenate or combine the channel estimation results.

[0158] As an example, the ID value in the fifth information is recorded as k2, and k2 can be any integer between 0 and 255.

[0159] As an example, when k1 in the second information is equal to k2 in the fifth information, it indicates that the first sub-channel estimation result and the second sub-channel estimation result can be used together to concatenate or combine the channel estimation results.

[0160] It can be understood that the identification information in the fifth information can also be called identification information of the resource group.

[0161] Optionally, in the communication method of this embodiment, after the network device configures the second resource for the terminal device and indicates the fifth information, the method may further include S370, where the network device sends a second reference signal based on the second resource. Correspondingly, the terminal device receives the second reference signal based on the second resource.

[0162] It can be understood that the second reference signal refers to a reference signal sent on the second resource.

[0163] As an example, all or part of the M2 antenna ports of the network device send reference signals on time-frequency resources having a mapping relationship in the second resources.

[0164] In some implementations, the energy per resource element (EPRE) of a reference signal transmitted by each of the M2 antenna ports of the network device is the same as the EPRE of a reference signal transmitted by each of the M1 antenna ports of the network device.

[0165] In some implementations, a digital automatic gain control (DAGC) configuration used by the terminal device when receiving the reference signal based on the second resource is the same as the DAGC configuration used by the terminal device when receiving the reference signal based on the first resource.

[0166] Optionally, the communication method of this embodiment may further include S380.

[0167] S380, the terminal device sends sixth information to the network device, where the sixth information includes a second sub-channel estimation result, where the second sub-channel estimation result is a channel estimation result based on the reference signal received from the second resource.

[0168] In some implementations, the terminal device feeds back the channel estimation result for the antenna port to the network device based on the indication of the fifth information. In other words, the terminal device explicitly feeds back the channel estimation result for the antenna port to the network device when it determines that the second information has been received, rather than feeding back other forms of results.

[0169] In some implementations, the sixth information may further include the fifth information, indicating that the second sub-channel estimation result is a channel estimation result for splicing or combining.

[0170] In some implementations, the quantization compression method or parameters used by the terminal device to send the third information are the same as the quantization compression method or parameters used by the terminal device to send the sixth information.

[0171] It can be understood that in this embodiment, the execution order of the four steps S310 to S340 and S350 to S380 is not limited. For example, S350 to S380 can be placed before S310 to S340.

[0172] Optionally, the communication method of this embodiment may further include S390.

[0173] S390: The network device determines a first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result.

[0174] As an example, the network device can obtain a first subchannel estimation result corresponding to M1 antenna ports based on the first subchannel estimation result; obtain a second subchannel estimation result corresponding to M2 antenna ports based on the second subchannel estimation result; and determine the first channel estimation result based on the first subchannel estimation result and the second subchannel estimation result.

[0175] As an example, determining the first channel estimation result based on the first subchannel estimation result and the second subchannel estimation result may include: directly concatenating (conjunction) the first subchannel estimation result and the second subchannel estimation result to obtain the first channel estimation result.

[0176] As an example, the first sub-channel estimation result, the second sub-channel estimation result, and the first channel estimation result may be channel matrices.

[0177] For example, if the first sub-channel estimation result is a channel matrix for 64 antenna ports, and the second sub-channel estimation result is a channel matrix for 128 antenna ports, then a channel matrix for 192 antenna ports can be obtained.

[0178] In this embodiment, when the first subchannel estimation result and the second subchannel estimation result are directly concatenated to obtain the first channel estimation result, the column order of the first subchannel estimation result and the second subchannel estimation result in the first channel estimation result may be determined according to a preset rule.

[0179] As an example, the preset rule may stipulate that the order relationship of the channel estimation results of the antenna ports supported by the resources is the same as the order relationship of the identifications of the resources.

[0180] For example, if the time domain resources in the first resource are earlier than the time domain resources in the second resource, the channel estimation result of the antenna port supported by the first resource is located before the channel estimation result of the antenna port supported by the second resource.

[0181] For example, when the time domain resource in the first resource is earlier than the time domain resource in the second resource, the first subchannel estimation result is recorded as The second sub-channel estimation result is recorded as Then the first channel estimation result It can be expressed as

[0182] As another example, the preset rule may stipulate that the channel estimation results in the first sub-channel estimation result and the second sub-channel estimation result are arranged in order of antenna port identifiers from small to large or from large to small to obtain the first channel estimation result.

[0183] In this embodiment, a schematic diagram of directly connecting channel estimation results is shown in FIG4(a). In FIG4(a), the left box represents the channel estimation result corresponding to the first resource, and the right box represents the channel estimation result corresponding to the second resource. By directly connecting these two channel estimation results, channel estimation results for more antenna ports can be obtained.

[0184] As another example, determining the first channel estimation result based on the first subchannel estimation result and the second subchannel estimation result may include: splicing the first subchannel estimation result and the second subchannel estimation result based on a reference antenna port to obtain the first channel estimation result.

[0185] The reference antenna port may also be referred to as a base antenna port, or simply referred to as a reference port or base port. The reference port may be predefined in the communication protocol or determined by the network device itself based on requirements.

[0186] As an example, splicing the first subchannel estimation result and the second subchannel estimation result based on the reference antenna port may include: calculating the difference between the channel estimation result corresponding to the reference antenna port in the first subchannel estimation result and the channel estimation result corresponding to the reference antenna port in the second subchannel estimation result; compensating the difference on the channel estimation results corresponding to the antenna ports other than the reference port in the second subchannel estimation result to obtain the compensated channel estimation result; and splicing the first subchannel estimation result with the compensated channel estimation result to obtain the first channel estimation result.

[0187] An implementation manner of splicing the first sub-channel estimation result and the compensated channel estimation result may refer to a manner of directly connecting the first sub-channel estimation result and the second sub-channel estimation result.

[0188] In this embodiment, a schematic diagram of channel estimation splicing based on a reference port is shown in FIG4(b). In FIG4(b), the left box represents the channel estimation results for M1 antenna ports supported by the first resource, and the right box represents the channel estimation results for M2 antenna ports supported by the second resource. The last antenna port of the M1 antenna ports and the first antenna port of the M2 antenna ports share the same reference port. The first sub-channel estimation result and the second sub-channel estimation result can be spliced ​​based on this reference port.

[0189] In this embodiment, a schematic diagram of channel estimation splicing based on a reference port is shown in FIG4(c). In FIG4(c), the left box represents the channel estimation results for M1 antenna ports supported by the first resource, and the right box represents the channel estimation results for M2 antenna ports supported by the second resource. The first antenna port of the M1 antenna ports and the first antenna port of the M2 antenna ports share the same reference port. The first sub-channel estimation result and the second sub-channel estimation result can be spliced ​​based on this reference port.

[0190] In this embodiment, it can be understood that the first sub-channel estimation result may be the channel estimation results of all or part of the M1 antenna ports.

[0191] In some implementations, the first subchannel estimation result may be referred to as the channel estimation result of P1 antenna ports among the M1 antenna ports, where P1 is a positive integer less than or equal to M1. P1 is a positive integer and may be equal to or less than M1.

[0192] When P1 is equal to M1, that is, when the network device sends the reference channel through all of the M1 antenna ports, as an example, the terminal device can obtain the first subchannel estimation result based on least squares estimation.

[0193] As an example, when the first sub-channel estimation result is a channel estimation result of a reference signal sent by 64 antenna ports, the first sub-channel estimation result is a channel matrix corresponding to the 64 antenna ports.

[0194] When P1 is less than M1, that is, when the network device sends the reference channel through some of the M1 antenna ports, as an example, the network device can determine the channel estimation results of the M1 antenna ports based on the channel estimation results of the P1 antenna ports, that is, the first sub-channel estimation results.

[0195] As an example, when M1 is 64, the terminal device measures the channel estimation results of 40 antenna ports on the first resource, and therefore feeds back the channel estimation results of 40 ports to the network device, that is, P1=40.

[0196] For example, when M1 is equal to 64 and P1 is equal to 40, the network device may determine the channel estimation results of the 64 antenna ports based on the channel estimation results of the 40 antenna ports.

[0197] When determining the channel estimation results of M1 antenna ports based on the channel estimation results of P1 antenna ports, some implementation methods are as follows: determining the channel estimation results of M1 antenna ports based on the channel estimation results of P1 antenna ports and channel estimation auxiliary information corresponding to the M1 antenna ports.

[0198] The following first introduces the relevant knowledge based on channel estimation auxiliary information. Channel estimation auxiliary information can be obtained based on the channel matrix. For example, the channel matrix is ​​recorded as H, and the dimension of the channel matrix H is N RE ×N TX , N RE Indicates the number of REs used to transmit reference signals in the resource, N TX Indicates the number of antenna ports supported by the resource, that is, the number of ports for the reference signal. The channel matrix can be, for example, a channel matrix of a downlink channel obtained by estimating the uplink channel based on uplink and downlink reciprocity, or a channel matrix based on a historical period, or a channel matrix predicted by an artificial intelligence (AI) model, which is not limited in this application.

[0199] FIG5 exemplarily shows the channel estimation auxiliary information. For example, the channel matrix is ​​subjected to singular value decomposition (SVD) to obtain the spatial-frequency domain projection matrix V of the channel matrix. H , the matrix V H The matrix V is a matrix consisting of R row vectors in the right unitary matrix obtained by performing SVD on the channel matrix, where R is the rank of the channel matrix. H The dimension is R×N TX From V H Obtain the maximum linearly uncorrelated group of column vectors to obtain the matrix P aug , whose dimension is N TX ×N aug , N aug is less than or equal to N TX As shown in the figure, the matrix P aug Including N aug non-zero elements, each non-zero element is in the matrix P aug In a column, all other elements are zero, indicating that TX Select the more important N aug ports are used to send reference signals. The matrix P aug Can indicate N aug Ports in N TX The index in the port, so the matrix P can also be called aug is the port pattern used to indicate the reference signal. H and P aug Channel estimation auxiliary information P can be obtained + , P + Satisfy: (V H P aug ) -1 V H , whose dimension is Naug ×N TX .

[0200] It is not difficult to see that although the number of ports for sending reference signals can be less than N TX , but based on the channel estimation auxiliary information P + , we can reconstruct N TX The channel matrix of the ports. One of the reconstructed expressions is as follows:

[0201] Where H' represents the channel matrix of the antenna port that actually sends the reference signal. Indicates N TX The channel matrix of the antenna ports.

[0202] For the first resource, H' represents the channel matrix of P1 antenna ports, represents the channel matrix of M1 antenna ports.

[0203] In this embodiment, similarly, the second sub-channel estimation result may be the channel estimation results of all or part of the M2 antenna ports.

[0204] In some implementations, the second sub-channel estimation result may be referred to as a channel estimation result for P2 antenna ports among the M2 antenna ports, where P2 is a positive integer less than or equal to M2. P2 is a positive integer and may be equal to or less than M2.

[0205] When P2 is equal to M2, that is, when the network device sends the reference channel through all of the M2 antenna ports, as an example, the terminal device can obtain the second sub-channel estimation result based on least squares estimation.

[0206] As an example, when the second sub-channel estimation result is a channel estimation result of a reference signal sent by 128 antenna ports, the second sub-channel estimation result is a channel matrix corresponding to the 128 antenna ports.

[0207] When P2 is less than M2, that is, when the network device sends the reference channel through some of the M2 antenna ports, as an example, the network device can determine the channel estimation results of the M2 antenna ports based on the channel estimation results of the P2 antenna ports, that is, the second sub-channel estimation results.

[0208] As an example, when M2 is 128, the terminal device measures the channel estimation results of 64 antenna ports on the second resource, and therefore feeds back the channel estimation results of 64 ports to the network device, that is, P2=64.

[0209] For example, when M2 is equal to 128 and P2 is equal to 64, the network device can determine the channel estimation results of the 128 antenna ports based on the channel estimation results of the 64 antenna ports.

[0210] When determining the channel estimation results of M2 antenna ports based on the channel estimation results of P2 antenna ports, some implementation methods are as follows: determining the channel estimation results of M2 antenna ports based on the channel estimation results of P2 antenna ports and channel estimation auxiliary information corresponding to the M2 antenna ports.

[0211] When determining the channel estimation results of the M2 antenna ports based on the channel estimation results of the P2 antenna ports and the channel estimation auxiliary information corresponding to the M2 antenna ports, one implementation method can refer to the aforementioned implementation method of determining the channel estimation results based on the channel estimation auxiliary information, which will not be repeated here.

[0212] In this embodiment, the first sub-channel estimation result and the second sub-channel estimation result are respectively associated with corresponding resources. Therefore, the channel estimation results to be spliced ​​can also be understood as the splicing of corresponding resources, and these resources can become resources for splicing.

[0213] In this embodiment, optionally, S305 may be further included, i.e., the terminal device reports capabilities supported by the terminal device. The capabilities supported by the terminal may include at least one of the following capabilities: whether splicing of channel estimation results is supported, the maximum number of antenna ports that can be spliced, the maximum number of resources that can be spliced, the time span of resources corresponding to the spliced ​​antenna ports, the number of spliced ​​antenna port groups, the reason for supporting splicing, or the scenario in which splicing is supported.

[0214] An example of a scenario that supports splicing is as follows: a base station has multiple antenna panels, and each panel has a large number of antenna ports.

[0215] An example of a reason for supporting splicing is as follows: a terminal device has multiple antenna panels, and each panel has a large number of antenna ports.

[0216] As an example, the terminal may report the capabilities supported by the terminal in higher layer signaling when accessing a cell.

[0217] An example of a splicing time span supported by a terminal device is shown in Figure 6. Here, t1 represents the time of the earliest resource in the time domain among the resources used for splicing, Kmax represents the maximum number of resources used for splicing, tKmax represents the time of the latest resource in the time domain among the resources used for splicing, and Δt represents the time span.

[0218] It can be understood that the network device can send corresponding CSI-RS resources to the terminal according to the capability information reported by the terminal.

[0219] It can be understood that in some embodiments of the present application, the network device may not send the second information and the fifth information to the terminal device.

[0220] The method of this embodiment can obtain channel estimation results for a larger number of antenna ports based on the channel estimation results for a smaller number of antenna ports.

[0221] In the method of this embodiment, the resources that can be spliced, or the antenna ports that can be spliced, or the channel estimation results that can be spliced ​​are indicated to the terminal device based on the second information. This allows the terminal to explicitly feedback the channel estimation results to the network device based on the indication of the second information, and the network device performs channel estimation processing, thereby reducing the complexity of the terminal.

[0222] In the method of this embodiment, the network device can determine the channel estimation results of more antenna ports based on the channel estimation results of a smaller number of antenna ports and channel estimation auxiliary information, so that the network device can configure fewer resources, send fewer reference signals, and receive channel estimation results of fewer antenna ports in a scenario where the channel estimation results of more antenna ports are required, thereby saving signaling overhead.

[0223] FIG7 is a schematic flowchart of a communication method provided in another embodiment of the present application.

[0224] S710: A network device sends first information to a terminal device, where the first information is used to configure a first resource, where the first resource is used to send a reference signal, and where the first resource supports M1 antenna ports, where M1 is a positive integer. Accordingly, the terminal device receives the first information.

[0225] In this embodiment, this step may refer to S310 and will not be described again here.

[0226] The difference between this step and S310 may include: the first information further includes channel estimation auxiliary information corresponding to the first resource. The channel estimation auxiliary information corresponding to the first resource may also be referred to as channel estimation auxiliary information corresponding to M1 antenna ports.

[0227] It can be understood that the channel estimation auxiliary information corresponding to the first resource may not be included in the first information, but may be sent through other information that can be associated with the first resource or the first information.

[0228] S720: The network device sends second information to the terminal device, where the second information indicates that the channel estimation results of the M1 antenna ports are used to determine a first channel estimation result, where the first channel estimation result is a channel estimation result of the first antenna port, and the M1 antenna ports are some of the first antenna ports. Accordingly, the terminal device receives the second information.

[0229] In this embodiment, this step may refer to S320 and will not be repeated here.

[0230] S730: The network device sends a first reference signal based on the first resource. Correspondingly, the terminal device receives the first reference signal based on the first resource.

[0231] In this embodiment, this step may refer to S330 and will not be repeated here.

[0232] S740, the terminal device determines a first sub-channel estimation result, where the first sub-channel estimation result is a channel estimation result of M1 antenna ports.

[0233] The terminal device determining the first sub-channel estimation result may include: the terminal device performing channel estimation on the reference signal received by the first resource to obtain the first sub-channel estimation result.

[0234] In this embodiment, the terminal device determines the first sub-channel estimation result. Reference may be made to the implementation method of the network device determining the first sub-channel estimation result in S390, which will not be repeated here.

[0235] S750: The network device sends fourth information to the terminal device, where the fourth information is used to configure a second resource, where the second resource is used to send a reference signal, and where the second resource supports M2 antenna ports, where M2 is a positive integer. Accordingly, the terminal device receives the fourth information.

[0236] The difference between this step and S330 may include: the fourth information further includes channel estimation auxiliary information corresponding to the second resource. The channel estimation auxiliary information corresponding to the second resource may also be referred to as channel estimation auxiliary information corresponding to M2 antenna ports.

[0237] It can be understood that the channel estimation auxiliary information corresponding to the second resource may not be included in the fourth information, but may be sent through other information that can be associated with the second resource or the fourth information.

[0238] In this embodiment, this step may refer to S350 and will not be described again here.

[0239] S760: The network device sends fifth information to the terminal device, where the fifth information indicates that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, where the M2 antenna ports are part of the first antenna ports. Accordingly, the terminal device receives the fifth information.

[0240] In this embodiment, this step may refer to S360 and will not be repeated here.

[0241] S770: The network device sends a second reference signal based on the second resource. Correspondingly, the terminal device receives the second reference signal based on the second resource.

[0242] In this embodiment, this step may refer to S370 and will not be repeated here.

[0243] S780, the terminal device determines a second sub-channel estimation result, where the second sub-channel estimation result is a channel estimation result of M2 antenna ports.

[0244] The terminal device determining the second sub-channel estimation result may include: the terminal device performing channel estimation on the reference signal received by the second resource to obtain the second sub-channel estimation result.

[0245] In this embodiment, the terminal device determines the second sub-channel estimation result. Reference may be made to the implementation manner in which the network device determines the second sub-channel estimation result based on the second sub-channel estimation result in S390, which will not be repeated here.

[0246] S790: The terminal device sends the first channel estimation result to the network device based on the first sub-channel estimation result and the second sub-channel estimation result.

[0247] The terminal device determines a first channel estimation result for the network device based on the first sub-channel estimation result and the second sub-channel estimation result, and sends the first channel estimation result to the network device.

[0248] When the terminal device determines the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result, one implementation method can refer to the implementation method in S390 in which the network device determines the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result, which will not be repeated here.

[0249] In this step, the connection rule or reference port used by the terminal device to determine the first channel estimation result based on the first subchannel estimation result and the second subchannel estimation result can be pre-configured based on the communication standard or configured based on information sent by the network device.

[0250] Optionally, this embodiment may further include S705, that is, the terminal device reports the capabilities supported by the terminal device. S705 may refer to S305 and will not be described in detail here.

[0251] It is understood that the embodiments shown in Figures 3 and 7 only illustrate the content of the channel estimation result obtained by splicing based on two resources, or based on two channel estimation results, but the technical solution of the present application is not limited to splicing only two resources or two channel estimation results. In some embodiments of the present application, splicing can be performed on a larger number of resources or a larger number of channel estimation results.

[0252] 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 .

[0253] 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 Figures 3 and 7. 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 Figures 3 and 7, 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 Figures 3 and 7.

[0254] As a second example, the apparatus 800 can be used to implement the communication method implemented by a network device in any of the embodiments shown in Figures 3 and 7. 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 Figures 3 and 7, 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 Figures 3 and 7.

[0255] 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.

[0256] 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.

[0257] Apparatus 900 may be a communications device or a chip used in a communications device. For example, 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 apparatus 900 is a UE or a network device, communication circuit 902 may be a transceiver.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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 first communication device, the method includes: Receiving first information for configuring a first resource for receiving a reference signal, the first resource supporting M1 antenna ports, where M1 is a positive integer; Receiving second information indicating that the channel estimation results of the M1 antenna ports are used to determine a first channel estimation result, the first channel estimation result being the channel estimation result of a first antenna port, and the M1 antenna ports being some of the antenna ports of the first antenna port.

2. The method according to claim 1, wherein The method further includes: In response to the second information, sending third information including the channel estimation results of P1 antenna ports among the M1 antenna ports, where P1 is a positive integer less than or equal to M1.

3. The method according to claim 2, wherein The third information further includes the second information.

4. The method according to claim 2 or 3, characterized in that, The method further includes: Receiving fourth information for configuring a second resource for transmitting a reference signal, the second resource supporting M2 antenna ports, where M2 is a positive integer; Receiving fifth information indicating that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, and the first antenna port further includes all or some of the antenna ports of the M2 antenna ports; In response to the fifth information, sending sixth information including the channel estimation results of P2 antenna ports among the M2 antenna ports, where P2 is a positive integer less than or equal to M2; wherein the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

5. The method according to claim 1, characterized in that The method further includes: Sending seventh information indicating the first channel estimation result.

6. The method according to claim 5, wherein The first channel estimation result includes a first sub-channel estimation result and a second sub-channel estimation result, the first sub-channel estimation result being the channel estimation result of the M1 antenna ports, and the second sub-channel estimation result being the channel estimation result of M2 antenna ports, where M2 is a positive integer.

7. The method according to claim 6, wherein The sorting relationship between the first sub-channel estimation result and the second sub-channel estimation result in the first channel estimation result is the same as the sorting relationship between the first resource and the second resource, the second resource being for transmitting a reference signal and supporting the M2 antenna ports, and the sorting relationship between the first resource and the second resource being predefined or configured by a second communication device for the first communication device.

8. The method according to claim 5, wherein The first channel estimation result includes a first sub-channel estimation result and a third sub-channel estimation result. The first sub-channel estimation result is the channel estimation result of the M1 antenna ports. The third sub-channel estimation result includes the channel estimation results of L antenna ports. The channel estimation result of each antenna port among the L antenna ports is determined based on the channel estimation result of each antenna port included in the second channel estimation result and a first reference difference. The second sub-channel estimation result is the channel estimation result of M2 antenna ports, where M2 is a positive integer. The first reference difference is the difference between the channel estimation result of a reference port included in the first sub-channel estimation result and the channel estimation result of the reference port included in the second sub-channel estimation result. The reference port is predefined or configured by the second communication device for the first communication device. L is a positive integer less than M2.

9. The method according to any one of claims 1 to 8, characterized in that, The second information includes a first identifier, where the first identifier is the identifier of a first group of channel estimation results. The first group of channel estimation results includes at least one channel estimation result, and the channel estimation results in the first group of channel estimation results are used to splice the first channel estimation result.

10. The method according to any one of claims 1 to 9, characterized in that The method further includes: Receiving an eighth piece of information, where the eighth piece of information is used to configure a third resource. The third resource is used to transmit a reference signal, and the third resource supports M3 antenna ports, where M3 is a positive integer. Receiving a ninth piece of information, where the ninth piece of information indicates that the channel estimation results of the M3 antenna ports are used to determine the first channel estimation result. The first antenna port further includes all or part of the M3 antenna ports. Receiving a first reference signal based on the first resource. Receiving a second reference signal based on the third resource. Wherein, the digital automatic gain control (DAGC) configuration used for receiving the first reference signal is the same as the DACG configuration used for receiving the second reference signal.

11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: Sending a tenth piece of information, where the tenth piece of information indicates the capabilities supported by the first communication device. The supported capabilities include at least one of the following capabilities: supporting the splicing of channel estimation results, the maximum number of antenna ports for splicing, the time span of the resources corresponding to the antenna ports for splicing, the number of groups of antenna ports for splicing, the reason for supporting splicing, or the scenario for supporting splicing.

12. A communication method, characterized in that, Applied to a second communication device, the method includes: Sending a first piece of information, where the first piece of information is used to configure a first resource. The first resource is used to transmit a reference signal, and the first resource supports M1 antenna ports, where M1 is a positive integer. Sending a second piece of information, where the second piece of information indicates that the channel estimation results of the M1 antenna ports are used to determine a first channel estimation result. The first channel estimation result is the channel estimation result of the first antenna port, and the M1 antenna ports are part of the first antenna port.

13. The method according to claim 12, wherein The method further includes: Receiving a third piece of information, where the third piece of information includes the channel estimation results of P1 antenna ports among the M1 antenna ports, and P1 is a positive integer less than or equal to M1.

14. The method according to claim 13, wherein The third information further includes the second information.

15. The method according to claim 13 or 14, characterized in that, The method further includes: Sending fourth information for configuring a second resource for transmitting a reference signal, where the second resource supports M2 antenna ports, and M2 is a positive integer; Sending fifth information indicating that the channel estimation results of the M2 antenna ports are used to determine the first channel estimation result, and the first antenna port further includes all or part of the M2 antenna ports; Receiving sixth information from the first communication device, where the sixth information includes the channel estimation results of P2 antenna ports among the M2 antenna ports, and P2 is a positive integer less than or equal to M2; Wherein, the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

16. The method according to claim 12, wherein The method further includes: Receiving seventh information indicating the first channel estimation result.

17. The method according to claim 16, wherein The first channel estimation result includes a first sub-channel estimation result and a second sub-channel estimation result. The first sub-channel estimation result is the channel estimation result of the M1 antenna ports, and the second sub-channel estimation result is the channel estimation result of M2 antenna ports, and M2 is a positive integer.

18. The method according to claim 17, wherein The sorting relationship between the first sub-channel estimation result and the second sub-channel estimation result in the first channel estimation result is the same as the sorting relationship between the first resource and the second resource. The second resource is used to transmit a reference signal and the second resource supports the M2 antenna ports. The sorting relationship between the first resource and the second resource is predefined or configured by the second communication device for the first communication device.

19. The method according to claim 16, wherein The first channel estimation result includes a first sub-channel estimation result and a third sub-channel estimation result. The first sub-channel estimation result is the channel estimation result of the M1 antenna ports. The third sub-channel estimation result includes the channel estimation results of L antenna ports. The channel estimation result of each antenna port among the L antenna ports is determined based on the channel estimation result of each antenna port included in the second channel estimation result and a first reference difference. The second sub-channel estimation result is the channel estimation result of M2 antenna ports, and M2 is a positive integer. The first reference difference is the difference between the channel estimation result of a reference port included in the first sub-channel estimation result and the channel estimation result of the reference port included in the second sub-channel estimation result. The reference port is predefined or configured by the second communication device for the first communication device, and L is a positive integer less than M2.

20. The method according to any one of claims 12 to 19, characterized in that, The second information includes a first identifier, which is the identifier of a first group of channel estimation results. The first group of channel estimation results includes at least one channel estimation result, and the channel estimation results in the first group of channel estimation results are used to splice the first channel estimation result.

21. The method according to any one of claims 12 to 20, characterized in that, The method further includes: Sending eighth information for configuring a third resource for transmitting a reference signal, where the third resource supports M3 antenna ports, and M3 is a positive integer; Send a ninth message, where the ninth message indicates that the channel estimation results of the M3 antenna ports are used to determine the first channel estimation result, and the first antenna port further includes all or part of the M3 antenna ports; Send a first reference signal based on the first resource through all or part of the M1 antenna ports; Send a second reference signal based on the third resource through all or part of the M3 antenna ports; Wherein, the EPRE of the first reference signal is the same as the EPRE of the second reference signal.

22. The method according to any one of claims 12 to 21, characterized in that, The method further includes: Receive a tenth message, where the tenth message indicates the capabilities supported by a first communication device, and the supported capabilities include at least one of the following capabilities: supporting the splicing of channel estimation results, the maximum number of antenna ports for splicing, the time span of the resources corresponding to the antenna ports for splicing, the number of antenna port groups for splicing, the reason for supporting splicing, or the scenario for supporting splicing.

23. A communication device, characterized in that, Includes functional modules for implementing the method according to any one of claims 1 to 22.

24. A communication device, characterized in that, Includes: A memory and a processor; The memory is used to store program instructions; The processor is used to execute the program instructions in the memory to implement the method according to any one of claims 1 to 22.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code for computer execution, and the program code includes instructions for implementing the method according to any one of claims 1 to 22.

26. A computer program product, characterized in that, The computer program product contains instructions for implementing the communication method according to any one of claims 1 to 22.

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