Communication method and related device

Abstract

The invention provides a communication method and a communication device, which are applied to the technical field of communication. In the technical scheme provided by the invention, a terminal receives first information, the first information is used for configuring a first resource, a reference signal is received in the first resource, the first resource supports M1 antenna ports, and M1 is a positive integer; second information is received, the second information indicates that the channel estimation results of the M1 antenna ports are used for determining a first channel estimation result, the first channel estimation result is the channel estimation result of the first antenna ports, and the M1 antenna ports are part of the antenna ports in the first antenna ports. According to the combined splicing of the channels corresponding to the CSI-RS resources provided by the invention, the feedback overhead of the CSI can be reduced.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to communication methods and related devices. Background Art

[0002] A multi-input multi-output (MIMO) system refers to an antenna system that uses multiple antennas at both the transmitting end and the receiving end to form multiple channels between the transceiver. To transmit and receive data, the MIMO system needs to go through channel estimation.

[0003] With the development of communication technologies, in order to further improve the capacity and spectral efficiency of communication systems, the number of antenna ports in MIMO systems is increasing. For example, a massive MIMO system has been proposed.

[0004] In order to support dynamically changing numbers of antenna ports in a massive MIMO system, network devices need a flexible channel measurement resource configuration method with low signaling overhead. Summary of the Invention

[0005] This application provides a communication method and related devices, which can implement channel estimation in a MIMO system, thereby improving communication performance.

[0006] In a first aspect, this application provides a communication method and related devices. The method is used for a terminal device. The method includes: receiving first information for configuring a first resource, and the terminal device receives a reference signal on the first resource, where the first resource supports M1 antenna ports, and 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, where the first channel estimation result is the channel estimation result of a first antenna port, and the M1 antenna ports are some of the antenna ports of the first antenna port.

[0007] In some possible implementation manners, the reference signal may be a CSI-RS, and the first resource is a CSI-RS resource.

[0008] The first information and the second information may be carried in the same message or the same signaling, or may also be carried in different messages or different signalings.

[0009] The channel estimation result in the method may be a channel measurement value obtained by using least squares estimation, or a channel estimation value obtained by interpolating and filtering the channel measurement value, or a precoding indication obtained after further processing the channel estimation value.

[0010] In this method, the terminal device receives a reference signal on 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 of the antenna ports in the first antenna port.

[0011] In some possible implementation manners, the method further includes: in response to the second information, sending third information, where the third 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.

[0012] This method directly feeds back the channel estimation result by the terminal device, reducing the complexity of the UE.

[0013] In some possible implementation manners, the third information further includes the second information.

[0014] In this implementation manner, the network device learns from the third information that the indicated channel estimation result is used to determine the first channel estimation result.

[0015] In some possible implementation manners, the method further includes: receiving fourth information, where the fourth information is used to configure a second resource, and the second resource is used to send a reference signal, and the second resource supports M2 antenna ports, and M2 is a positive integer; receiving fifth information, where 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 further includes all or some of the M2 antenna ports.

[0016] The fourth information and the fifth information in this method can be carried in the same message or the same signaling, or can also be carried in different messages or different signalings.

[0017] In this method, the terminal device receives a reference signal on 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 of the antenna ports in the first antenna port.

[0018] In this implementation manner, as an example, the method may further include: in response to the fifth information, sending sixth information, 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; where the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

[0019] This method directly feeds back the channel estimation result by the terminal device, reducing the complexity of the UE.

[0020] 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 results of the antenna ports corresponding to the first resource and the channel estimation results of the antenna ports corresponding to the second resource can be spliced.

[0021] In this implementation manner, as another example, the method further includes: sending a seventh information, where the seventh information indicates the first channel estimation result.

[0022] In this method, the terminal device can reduce the CSI feedback overhead by feeding back the first channel estimation result.

[0023] In some possible implementation manners, 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, where M2 is a positive integer.

[0024] In some possible implementation manners, 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 send 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.

[0025] In some possible implementation manners, 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, and the third sub-channel estimation result includes the channel estimation results of L antenna ports. The channel estimation result of each antenna port in 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, and L is a positive integer less than M2.

[0026] In some possible implementation manners, 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.

[0027] In this method, the network device restores the first channel estimation result on all resources corresponding to the first antenna port by splicing.

[0028] In some possible implementation manners, 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, the third resource supports M3 antenna ports, and 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, and 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; where the delay 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.

[0029] In some possible implementation manners, 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, 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.

[0030] In this method, the network device may send corresponding CSI-RS resources to the terminal according to the capability information reported by the terminal.

[0031] In a second aspect, the present application provides a communication method, which is used for a network 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, the first resource supports M1 antenna ports, and 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 a first antenna port, and the M1 antenna ports are part of the antenna ports of the first antenna port.

[0032] In this method, the network device indicates the first resource to the terminal device, transmits a reference signal on the corresponding antenna port, and determines the first channel estimation result by determining the channel estimation results of some of the antenna ports in the first antenna port.

[0033] In some possible implementation manners, 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.

[0034] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0035] In some possible implementation manners, the third information further includes the second information.

[0036] In this implementation manner, the network device learns through the third information that the indicated channel estimation result is used to determine the first channel estimation result.

[0037] In some possible implementation manners, the method further includes: sending fourth information, where 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; sending fifth information, where the fifth information indicates that the channel estimation result of the M2 antenna ports is used to determine the first channel estimation result, and the first antenna port further includes all or part of the M2 antenna ports.

[0038] In this method, the network device indicates the second resource to the terminal device, sends a reference signal on 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.

[0039] In this implementation manner, as an example, the method may further include: 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; where the quantization compression corresponding to the sixth information is the same as the quantization compression method corresponding to the third information.

[0040] This method directly feeds back the channel estimation result through the terminal device, reducing the complexity of the UE.

[0041] 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 results of the antenna ports corresponding to the first resource and the antenna ports corresponding to the second resource can be spliced.

[0042] In some possible implementation manners, the method further includes: receiving seventh information, where the seventh information indicates the first channel estimation result.

[0043] In this method, the terminal device can reduce the CSI feedback overhead by feeding back the first channel estimation result.

[0044] In some possible implementations, 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, where M2 is a positive integer.

[0045] In some possible implementations, 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 supports the M2 antenna ports, and 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.

[0046] 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, and 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, and L is a positive integer less than M2.

[0047] In some possible implementations, the second information includes a first identifier, and 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.

[0048] In some possible implementation manners, the method further includes: receiving eighth information for configuring a third resource, where the third resource is used to transmit a reference signal, the third resource supports M3 antenna ports, and M3 is a positive integer; receiving ninth information indicating that the channel estimation result of the M3 antenna ports is used to determine the first channel estimation result, and 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; where 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.

[0049] In some possible implementation manners, the method further includes: transmitting tenth information indicating the capabilities supported by the first communication device, where the supported capabilities include at least one of the following capabilities: supporting 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.

[0050] In a third aspect, the present application provides a communication device. The communication device may include modules corresponding one by one to the methods / operations / steps / actions described in the first aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software.

[0051] In one design, the device may include a processing module and a communication module. Wherein, the communication module is used to perform the sending actions and receiving actions executed by the communication node in the method described in the first aspect above, and the processing module is used to perform the actions related to processing executed by the communication node in the method described in the first aspect above.

[0052] In one design, the device may be a terminal device, or a device, module, circuit, or chip configured to be disposed in a terminal device, or a device that can be used in matching with a terminal device.

[0053] In a fourth aspect, the present application provides a communication device. The communication device may include modules corresponding one by one to the methods / operations / steps / actions described in the second aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software.

[0054] In one design, the device may include a processing module and a communication module. Wherein, the communication module is used to perform the sending actions and receiving actions executed by the first communication node in the method described in the second aspect above, and the processing module is used to perform the actions related to processing executed by the first communication node in the method described in the second aspect above.

[0055] In one design, the device can be a network device, or a device, module, circuit, or chip configured to be disposed in a network device, or a device that can be used in conjunction with a network device.

[0056] In a fifth aspect, a device is provided, including a processor and a storage medium. The storage medium stores instructions, and when the instructions are run by the processor, the methods in the first aspect or any possible implementation manner of the first aspect are implemented.

[0057] In a sixth aspect, a device is provided, including a processor and a storage medium. The storage medium stores instructions, and when the instructions are run by the processor, the methods in the second aspect or any possible implementation manner of the second aspect are implemented.

[0058] In a seventh aspect, a device is provided, including a processor for processing data and / or information to implement the methods in the first aspect or any possible implementation manner of the first aspect.

[0059] In one design, the device can be a terminal device, or a device, module, circuit, or chip configured to be disposed in a terminal device, or a device that can be used in conjunction with a terminal device.

[0060] Optionally, the device may further include a memory for storing programs or instructions, and the processor is used to run the programs or instructions to implement the methods in the first aspect or any possible implementation manner of the first aspect.

[0061] Optionally, the device may further include the transceiver circuit or the input / output interface.

[0062] In an eighth aspect, a device is provided, including a processor for processing data and / or information to implement the methods in the second aspect or any possible implementation manner of the second aspect.

[0063] In one design, the device can be a network device, or a device, module, circuit, or chip configured to be disposed in a network device, or a device that can be used in conjunction with a network device.

[0064] Optionally, the device may further include a memory for storing programs or instructions, and the processor is used to run the programs or instructions to implement the methods in the second aspect or any possible implementation manner of the second aspect.

[0065] Optionally, the device may further include the transceiver circuit or the input / output interface.

[0066] In a ninth aspect, a chip is provided, including a processor configured to run a program or instructions to implement the method in the first aspect or any possible implementation manner of the first aspect, or to implement the method in the second aspect or any possible implementation manner of the second aspect.

[0067] Optionally, the chip may further include a memory configured to store the program or instructions. Optionally, the chip may further include the transceiver circuit, or an input / output interface.

[0068] In a tenth aspect, a computer-readable storage medium is provided, including instructions that, when run by a processor, implement the method in the first aspect or any possible implementation manner of the first aspect, or implement the method in the second aspect or any possible implementation manner of the second aspect.

[0069] In an eleventh aspect, a computer program product is provided, including computer program code or instructions that, when run, implement the method in the first aspect or any possible implementation manner of the first aspect, or implement the method in the second aspect or any possible implementation manner of the second aspect.

[0070] In a 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 communication method in the first aspect or any possible implementation manner of the first aspect, or a communication device that executes the communication method in the second aspect or any possible implementation manner of the second aspect. Description of the Drawings

[0071] Figure 1 is a schematic diagram of a communication system applicable to the method of the embodiments of the present application;

[0072] Figure 2 is a schematic diagram of another communication system applicable to the method of the embodiments of the present application;

[0073] Figure 3 is a schematic flowchart of the communication method provided in an embodiment of the present application;

[0074] Figure 4 is a schematic diagram of channel splicing provided in an embodiment of the present application;

[0075] Figure 5 is a schematic diagram of obtaining channel estimation auxiliary information;

[0076] Figure 6 is a schematic diagram of the splicing time span supported by a terminal device;

[0077] Figure 7 Schematic flowchart of a communication method provided in another embodiment of this application;

[0078] Figure 8 Schematic structural diagram of a communication device according to an embodiment of this application;

[0079] Figure 9 Schematic structural diagram of a communication device provided in yet another embodiment of this application. Detailed implementation manners

[0080] Next, the technical solutions in the embodiments of this application will be described in conjunction with the accompanying drawings in the embodiments of this application.

[0081] For the convenience of clearly describing the technical solutions in the embodiments of this application, in the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different.

[0082] It should be noted that in the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0083] In the embodiments of this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one (item)" or its similar expression below refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, and (or) c may represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c may be single or multiple.

[0084] For the convenience of understanding the communication method provided in the embodiments of this application, the system architecture and application scenarios of the communication method provided in the embodiments of this application will be described below. It can be understood that the system architecture and application scenarios described in the embodiments of this application are for more clearly explaining the technical solutions in the embodiments of this application and do not constitute a limitation on the technical solutions provided in the embodiments of this application.

[0085] In the process of the evolution of communication technologies, high throughput and large connections have always been the core challenges of wireless communication networks. As a key technology that can significantly improve system capacity, multi-input multi-output (MIMO) technology is used to meet the high-speed transmission requirements. This technology utilizes spatial dimension resources. Without increasing the system bandwidth, it enables signals to obtain array gain, multiplexing and diversity gain, and interference cancellation gain in space, and can multiply the capacity and spectrum efficiency of communication systems.

[0086] Combined with the application of MIMO technology in the communication field, the technical solution provided by this application can be applied to various communication systems, such as: the 5th generation (5G) or new radio (NR) system, the long-term evolution (LTE) system, the LTE frequency division duplex (FDD) system, the LTE time division duplex (TDD) system, the wireless local area network (WLAN) system, the satellite communication system, future communication systems, such as the 6th generation (6G) mobile communication system, or a fusion system of multiple systems, etc. The technical solution 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 the Internet of Things (IoT) communication system or other communication systems, such as in the 6th generation (6G).

[0087] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, etc. Herein, the device can also be replaced with an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. In this application, the device is used as an example for description. For example, a communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0088] In the embodiments of the present application, the terminal device may also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.

[0089] The terminal device may be a device that provides voice / data. For example, it may be a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: mobile phone, tablet computer, laptop computer, palmtop computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing devices connected to a wireless modem, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0090] By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. A wearable device, also known as a wearable intelligent device, is a general term for devices developed by applying wearable technologies to the intelligent design of daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that can be directly worn on the body or integrated into the user's clothes or accessories. A wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to cooperate with other devices such as smart phones, such as various smart bracelets and smart jewelry for physical sign monitoring.

[0091] In the embodiments of the present application, the device for implementing the functions of the terminal device may be the terminal device itself, or a device capable of supporting the terminal device to implement such functions, such as a chip system. This device may be installed in the terminal device or used in matching with the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the embodiments of the present application, only the case where the device for implementing the functions of the terminal device is the terminal device itself is taken as an example for illustration, which does not limit the solutions of the embodiments of the present application.

[0092] The network device in the embodiments of the present application can be a device used to communicate with a terminal device. This network device can also be referred to as an access network device or a radio access network device. For example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can be broadly covered by various names below, or replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, slave 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 can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip disposed in the foregoing device or apparatus. A base station can also be a mobile switching center and a device that undertakes the base station function in D2D, V2X, M2M communications, a network side device in a 6G network, a device that undertakes the base station function in a future communication system, etc. A base station can support networks of the same or different access technologies. Optionally, the RAN node can also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.In some deployments, the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (Central Unit - Control Plane (CU - CP)) and a user plane CU node (Central Unit - User Plane (CU - UP)) and a DU node. For example, the network device may include a gNB - CU - CP, a gNB - CU - UP, and a gNB - DU.

[0093] For example, when the technical solution of the embodiments of the present application is applied to a Universal Mobile Telecommunications System (UMTS), an LTE communication system, an NR communication system, or a 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 a future wireless communication system, the network device may be a gNB.

[0094] In some deployments, multiple RAN nodes cooperate to assist a terminal in achieving wireless access, and different RAN nodes respectively implement some functions of a base station. For example, the RAN node may be a CU, a DU, a CU - CP, a CU - UP, or an RU, etc. The CU and the DU may be separately set, or may also be included in the same network element, such as a BBU. The RU may be included in a radio frequency device or a radio frequency unit, such as included in an RRU, an AAU, or an RRH.

[0095] The RAN node can support one or more types of fronthaul interfaces. Different fronthaul interfaces respectively correspond to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is the common public radio interface (CPRI), the DU is configured to implement one or more of the baseband functions, and the RU is configured to implement one or more of the radio frequency functions. If the fronthaul interface between the DU and the RU is another interface, compared with the CPRI, some of the downlink and / or uplink baseband functions, for example, for the downlink, one or more of precoding, digital beamforming (BF), or inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition, are moved from the DU to the RU for implementation. For the 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 a possible implementation, this interface can be the enhanced common public radio interface (eCPRI). In the eCPRI architecture, different splitting methods between the DU and the RU correspond to different categories (Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, F.

[0096] Taking eCPRI Cat A as an example, for downlink transmission, with layer mapping as the segmentation, the DU is configured to implement one or more functions before layer mapping (i.e., one or more of encoding, rate matching, scrambling, modulation, layer mapping), while other functions after layer mapping (such as one or more of RE mapping, digital beamforming (BF), or inverse fast Fourier transform (IFFT) / adding cyclic prefix (CP)) are moved to the RU for implementation. For uplink transmission, with de-RE mapping as the segmentation, the DU is configured to implement one or more functions before demapping (i.e., one or more of decoding, derate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, de-RE mapping), while other functions after demapping (such as one or more of digital BF or fast Fourier transform (FFT) / removing CP) are moved to the RU for implementation. It can be understood that for the function descriptions of the DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be elaborated here.

[0097] In a possible design, the processing unit in the BBU for implementing baseband functions is called the baseband high (BBH) unit, and the processing unit in the RRU / AAU / RRH for implementing baseband functions is called the baseband low (BBL) unit.

[0098] In different systems, the 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, the CU can also be called O-CU (open CU), the DU can also be called O-DU, the CU-CP can also be called O-CU-CP, the CU-UP can also be called O-CU-UP, and the RU can also be called O-RU. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0099] In the embodiments of the present application, the device for implementing the functions of a network device may be a network device; it may also be a device capable of supporting the network device to implement such functions, such as a chip system, a hardware circuit, a software module, or a combination of a hardware circuit and a software module. This device may be installed in the network device or used in combination with the network device. In the embodiments of the present application, only the case where the device for implementing the functions of the network device is a network device is taken as an example for illustration, which does not limit the solutions of the embodiments of the present application.

[0100] The network device and / or the terminal device may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they may also be deployed on water; they may also be deployed on airplanes, balloons, and satellites in the air. In the embodiments of the present application, the scenarios where the network device and the terminal device are located are not limited. In addition, the terminal device and the network device may be hardware devices, or software functions running on dedicated hardware or software functions running on general hardware. For example, they are virtualized functions instantiated on a platform (such as a cloud platform), or entities including dedicated or general hardware devices and software functions. The present application does not limit the specific forms of the terminal device and the network device.

[0101] Figure 1 is a schematic diagram of a communication system applicable to the method of the embodiments of the present application. As Figure 1 shown, the communication system 100 may include at least one network device, such as Figure 1 the network device 110 shown; the communication system 100 may also include at least one terminal device, such as Figure 1 the terminal device 120 and the terminal device 130 shown.

[0102] Figure 1 In the communication system shown in (a) of, both the terminal device 120 and the terminal device 130 may be within the coverage area of the cell service provided by the network device 110; Figure 1 In the communication system shown in (b) of, only one of the terminal devices may be within the coverage area of the cell service provided by the network device 110, such as the terminal device 120; Figure 1 In the communication system shown in (c) of, the terminal devices may all be outside the coverage area of the cell service provided by the network device 110.

[0103] The network device 110 may communicate with the terminal device 120 and the terminal device 130 through the UU (UTRAN-to-UE) air interface for wireless link communication, and the terminal device 120 and the terminal device 130 may directly communicate wirelessly through the PC5 air interface. Among the communication devices in this communication system, for example, between the network device 110 and the terminal device 120 and the terminal device 130, communication may be carried out through multi-antenna technology.

[0104] As an example, a single network device can transmit data or control signaling to a single or multiple terminal devices, and / or multiple network devices can simultaneously transmit data or control signaling to a single terminal device.

[0105] Figure 2 FIG. 4 is a schematic diagram of another communication system to which the method according to the embodiment of the present application is applicable. As Figure 2 shown, 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.

[0106] Among them, 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.

[0107] The receiver 2132 can be used to receive transmission control information through the antenna 2133, and the transmitter 2131 can be used to send transmission feedback information to the network device through the antenna 2133. The transmitter 2231 can be used to send transmission control information to the terminal device through the antenna 2233, and the receiver 2232 can be used to receive transmission feedback information sent by the terminal device through the antenna 2233.

[0108] It should be noted that Figure 1 and Figure 2 are only simplified schematic diagrams exemplified for easy understanding. In practical applications, the communication system may include multiple network devices or multiple terminal devices. The embodiment of the present application does not limit the number of network devices and terminal devices included in the communication system.

[0109] In a MIMO system, for transmitting and receiving data, the MIMO system needs to perform channel estimation. The system defines a channel quality measurement reference signal (CSI-RS), which is used for measuring the downlink channel corresponding to a physical antenna port. The receiver performs channel estimation for each antenna port sent by the base station and performs CSI feedback on the channel estimation result.

[0110] With the development of communication technology, in order to further improve the capacity and spectral efficiency of the communication system, a large-scale MIMO system has been proposed. Among them, increasing the number of CSI-RS ports is one of the key technical paths to realize large-scale MIMO. However, implementing a higher number of CSI-RS ports (such as 128, 256, 512, 1024,... ports) will cause a sharp increase in overhead.

[0111] An exemplary application scenario of the communication method of this application is a massive MIMO system. The communication method proposed in this application combines and splices multiple groups of channel estimation results corresponding to multiple CSI-RS resources to obtain channel estimation results of a larger number of antenna ports.

[0112] The following will introduce the communication method proposed in this application in combination with specific embodiments. Figure 3 It is a schematic flowchart of the communication method provided by an embodiment of this application. As Figure 3 shown, this method may include S310 and S320.

[0113] S310, the network device sends first information to the terminal device, and the first information is used to configure a first resource, and the first resource is used to send a reference signal, and the first resource supports M1 antenna ports, where M1 is a positive integer. Correspondingly, the terminal device receives the first information.

[0114] In this embodiment, the network device sends first information to the terminal device, and 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 a resource for the terminal device to send a reference signal, or in other words, the network device configures a resource for the terminal device to send a reference signal for estimating the channel state.

[0115] It can be understood that the reference signal in this embodiment can also be referred to as a pilot signal.

[0116] As an example, the reference signal may be CSI-RS, and correspondingly, the first resource is a CSI-RS resource.

[0117] It can be understood that the antenna ports supported by the first resource are the antenna ports of the network device.

[0118] As an example, M1 may be equal to 1, or M1 may be an integer greater than 1.

[0119] As an example, M1 = 64, indicating that the first resource supports 64 antenna ports.

[0120] For the sake of simplicity of description, the first resource may be referred to as the #1 CSI-RS resource.

[0121] It can be understood that there is a mapping relationship between each of the M1 antenna ports and the time-frequency resources included in the first resource, and this mapping relationship determines the time-frequency resources that can be used when sending a reference signal on each antenna port.

[0122] 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, the first channel estimation result is the channel estimation result of a first antenna port, and the M1 antenna ports are some of the antenna ports of the first antenna port. Correspondingly, the terminal device receives the second information.

[0123] It can be understood that the first antenna port can be all or some of the antenna ports of the network device.

[0124] In this embodiment, the second 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 a first antenna port, and the M1 antenna ports are some of the antenna ports 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.

[0125] In some implementation manners, the channel estimation results of the M1 antenna ports are used to determine a first channel estimation result. It can also be understood that: the channel estimation results of the M1 antenna ports are used to splice or combine the channel estimation results of more antenna ports including these M1 antenna ports.

[0126] In some implementation manners, the first information and the second information can be carried in the same message or the same signaling. In other implementation manners, the first information and the second information can be carried in different messages or different signallings. Here, the difference can include different types or different transmission resources.

[0127] For the convenience of description, the channel estimation results of the M1 antenna ports can be denoted as first sub-channel estimation results.

[0128] In this embodiment, since the second information is associated with the M1 antenna ports and the M1 antenna ports are also associated with a first resource, the second information can be referred to as the second information associated with the first resource. In addition, the M1 antenna ports are associated with the first sub-channel estimation results, so the first resource can also be referred to as being associated with the first sub-channel estimation results. In some possible implementation manners, the second information can at least include an identity document (ID) information, and the ID information is used to identify the resources associated with the channel estimation results that can be used to splice or combine the channel estimation results of the same group of channel estimation results. That is to say, if the ID information included in multiple pieces of information is the same, it means that the channel estimation results obtained by estimating the reference signals sent by the multiple resources associated with these multiple pieces of information can be used to splice or combine the same channel estimation result.

[0129] As an example, the ID value is denoted as k1, and k1 can be any integer between 0 and 255.

[0130] It can be understood that the identification information in the second information can also be referred to as the identification information of the resource group.

[0131] When the identification information in the second information is referred to as the identification information of the resource group, it can be understood that: when the network device configures resources for the terminal device to send reference signals, the resource group to which the resource belongs is indicated through the second information, and the channel estimation results corresponding to this group of resources can be used to splice or combine to obtain the channel estimation results of more antenna ports including the antenna ports corresponding to this group of resources.

[0132] In this embodiment, the channel estimation result of the antenna port may include: the channel matrix corresponding to the antenna port, the precoding indication corresponding to the antenna port, or the precoding vector corresponding to the antenna port.

[0133] Optionally, in the communication method of this embodiment, after the network device configures the first resource and indicates the second information for the terminal device, S330 may further be included, 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.

[0134] It can be understood that the first reference signal refers to the reference signal sent on the first resource.

[0135] As an example, all or part of the M1 antenna ports of the network device send reference signals on the time-frequency resources having a mapping relationship in the first resource.

[0136] Optionally, in the communication method of this embodiment, S340 may further be included.

[0137] S340: The terminal device sends third information to the network device, and the third information includes a first sub-channel estimation result, and the first sub-channel estimation result is the channel estimation result of the reference signal received based on the first resource. Correspondingly, the network device receives the third information.

[0138] In some implementation manners, the terminal device feeds back the channel estimation result of the antenna port to the network device based on the indication of the second information. Or rather, the terminal device explicitly feeds back the channel estimation result of the antenna port to the network device when it determines that the second information is received, rather than feeding back other forms of results.

[0139] In some implementation manners, the third information may further include the second information, indicating that the first sub-channel estimation result is the channel estimation result for splicing or combining.

[0140] Optionally, in the communication method of this embodiment, S350 and S360 may further be included.

[0141] In S350, the network device sends the fourth information to the terminal device. The fourth information is used to configure the second resource, and the second resource is used to send a reference signal. The second resource supports M2 antenna ports, where M2 is a positive integer. Correspondingly, the terminal device receives the fourth information.

[0142] In this embodiment, the network device sends the fourth information to the terminal device. 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 resource for sending the reference signal to the terminal device, or in other words, the network device configures the resource for sending the reference signal used to estimate the channel state to the terminal device.

[0143] As an example, the reference signal may be a CSI-RS. Correspondingly, the second resource is a CSI-RS resource.

[0144] It can be understood that the antenna ports supported by the second resource are the antenna ports of the network device.

[0145] As an example, M2 may be equal to 1, or M2 may be an integer greater than 1.

[0146] As an example, M2 = 128, indicating that the second resource supports 128 antenna ports.

[0147] For simplicity of description, the second resource may be referred to as the #2 CSI-RS resource.

[0148] It can be understood that there is a mapping relationship between each of the M2 antenna ports and the time-frequency resources included in the second resource. This mapping relationship determines the time-frequency resources that can be used when sending the reference signal on each antenna port.

[0149] In S360, the network device sends the fifth information to the terminal device. 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 M2 antenna ports are part of the first antenna ports. Correspondingly, the terminal device receives the fifth information.

[0150] 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 ports, and the M2 antenna ports are part 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.

[0151] In some implementations, the channel estimation results of M2 antenna ports are used to determine the first channel estimation result. It can also be understood that the channel estimation results of M2 antenna ports are used to splice or combine the channel estimation results of more antenna ports including these M2 antenna ports.

[0152] In some implementations, the fourth information and the fifth information can be carried in the same message or the same signaling. In some other implementations, the fourth information and the fifth information can be carried in different messages or different signaling. Here, the difference can include different types or different transmission resources.

[0153] For ease of description, the channel estimation results of M2 antenna ports can be denoted as the second sub-channel estimation results.

[0154] In this embodiment, since the fifth information is associated with M2 antenna ports, and M2 antenna ports are also associated with the second resource, the fifth information can be referred to as the fifth information associated with the second resource. In addition, M2 antenna ports are associated with the second sub-channel estimation results, so the second resource can also be referred to as being associated with the second sub-channel estimation results.

[0155] In some possible implementations, at least one identification information can be included in the fifth information. This identification information is used to identify the resources associated with the channel estimation results that can be used to splice or combine a set of channel estimation results. That is to say, if the identification information included in multiple pieces of information is the same, it means that the channel estimation results obtained by estimating the reference signals sent by the multiple resources associated with these multiple pieces of information can be used to splice or combine the same channel estimation result.

[0156] 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 splice or combine the channel estimation result.

[0157] As an example, the ID value in the fifth information is denoted as k2, and k2 can be any integer between 0 and 255.

[0158] As an example, when k1 in the second information is equal to k2 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 splice or combine the channel estimation result.

[0159] It can be understood that the identification information in the fifth information can also be referred to as the identification information of the resource group.

[0160] Optionally, in the communication method of this embodiment, after the network device configures the second resource and indicates the fifth information for the terminal device, it can further include S370, that is, 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.

[0161] It can be understood that the second reference signal refers to the reference signal transmitted on the second resource.

[0162] As an example, when all or some of the M2 antenna ports of the network device have a mapping relationship in the second resource, the reference signal is transmitted on the time-frequency resource.

[0163] In some implementations, the energy per resource element (EPRE) of the reference signal transmitted by each of the M2 antenna ports of the network device is the same as the EPRE of the reference signal transmitted by each of the M1 antenna ports of the network device.

[0164] In some implementations, the 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 used by the terminal device when receiving the reference signal based on the first resource.

[0165] Optionally, in the communication method of this embodiment, S380 may further be included.

[0166] S380: The terminal device sends sixth information to the network device, and the sixth information includes a second sub-channel estimation result, where the second sub-channel estimation result is the channel estimation result of the reference signal received based on the second resource.

[0167] In some implementations, the terminal device feeds back the channel estimation result of the antenna port to the network device based on the indication of the fifth information. Or rather, the terminal device explicitly feeds back the channel estimation result of the antenna port to the network device when it determines that the second information is received, rather than feeding back other forms of results.

[0168] In some implementations, the sixth information may further include the fifth information, indicating that the second sub-channel estimation result is the channel estimation result for splicing or combining.

[0169] In some implementations, the quantization compression method or parameter used by the terminal device to send the third information is the same as the quantization compression method or parameter used by the terminal device to send the sixth information.

[0170] It can be understood that in this embodiment, the execution order between the four steps of S310 to S340 and S350 to S380 is not limited. For example, S350 to S380 may be located before S310 to S340.

[0171] Optionally, in the communication method of this embodiment, S390 may further be included.

[0172] In the 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.

[0173] As an example, the network device may obtain the first sub-channel estimation results corresponding to M1 antenna ports based on the first sub-channel estimation result; obtain the second sub-channel estimation results corresponding to M2 antenna ports based on the second sub-channel estimation result; and determine the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result.

[0174] As an example, determining the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result may include: directly concatenating (concatenate / conjunction) the first sub-channel estimation result and the second sub-channel estimation result to obtain the first channel estimation result.

[0175] 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.

[0176] For example, if the first sub-channel estimation result is a channel matrix of 64 antenna ports and the second sub-channel estimation result is a channel matrix of 128 antenna ports, a channel matrix of 192 antenna ports can be obtained.

[0177] In this embodiment, when the first channel estimation result is directly concatenated from the first sub-channel estimation result and the second sub-channel estimation result, the column order of the first sub-channel estimation result and the second sub-channel estimation result in the first channel estimation result may be determined according to a preset rule.

[0178] As an example, the preset rule may stipulate that the order relationship of the channel estimation results of the antenna ports supported by the resource is the same as the order relationship of the resource identifiers.

[0179] For example, if the time-domain resource in the first resource is earlier than the time-domain resource in the second resource, the channel estimation result of the antenna ports supported by the first resource is located before the channel estimation result of the antenna ports supported by the second resource.

[0180] For example, when the time-domain resource in the first resource is earlier than the time-domain resource in the second resource, the first sub-channel estimation result is denoted as The second sub-channel estimation result is denoted as Then the first channel estimation result Can be expressed as

[0181] As another example, the pre-set rules may stipulate that the channel estimation results in the first sub-channel estimation result and the second sub-channel estimation result are arranged in ascending or descending order according to the identifiers of the antenna ports, so as to obtain the first channel estimation result.

[0182] In this embodiment, a schematic diagram of the direct connection of the channel estimation results is as Figure 4 shown in (a) of Figure 4 In (a) of , 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. These two channel estimation results are directly connected together to obtain the channel estimation results of more antenna ports.

[0183] As another example, determining the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result may include: splicing the first sub-channel estimation result and the second sub-channel estimation result based on a reference antenna port to obtain the first channel estimation result.

[0184] Among them, the reference antenna port can also be called the reference antenna port, and can be abbreviated as the reference port or the reference port. The reference port can be predefined in the communication protocol or determined by the network device itself based on requirements.

[0185] As an example, splicing the first sub-channel estimation result and the second sub-channel 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 sub-channel estimation result and the channel estimation result corresponding to the reference antenna port in the second sub-channel estimation result; compensating the difference on the channel estimation results corresponding to the antenna ports other than the reference port in the second sub-channel estimation result to obtain the compensated channel estimation result; splicing the first sub-channel estimation result and the compensated channel estimation result to obtain the first channel estimation result.

[0186] An implementation manner of splicing the first sub-channel estimation result and the compensated channel estimation result may refer to the manner of directly connecting the first sub-channel estimation result and the second sub-channel estimation result.

[0187] In this embodiment, a schematic diagram of channel estimation splicing based on the reference port is as Figure 4 shown in (b) of Figure 4 In (b) of , the left box represents the channel estimation results of M1 antenna ports supported by the first resource, and the right box represents the channel estimation results of M2 antenna ports supported by the second resource. The last antenna port among these M1 antenna ports and the first antenna port among these M2 antenna ports are the same reference port, and the first sub-channel estimation result and the second sub-channel estimation result can be spliced based on this reference port.

[0188] In this embodiment, a schematic diagram of channel estimation splicing based on a reference port is as shown in Figure 4 (c) in Figure 4 In (c) of , the left box represents the channel estimation results of M1 antenna ports supported by the first resource, and the right box represents the channel estimation results of M2 antenna ports supported by the second resource. The first antenna port among these M1 antenna ports and the first antenna port among these M2 antenna ports are the same reference port. Based on this reference port, the first sub-channel estimation result and the second sub-channel estimation result can be spliced.

[0189] In this embodiment, it can be understood that the first sub-channel estimation result can be the channel estimation results of all or part of the M1 antenna ports.

[0190] In some implementation manners, the first sub-channel estimation result can be referred to as 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. Among them, P1 is a positive integer, and P1 can be equal to M1 or less than M1.

[0191] When P1 is equal to M1, that is, when the network device sends a reference channel through all ports among the M1 antenna ports, as an example, the terminal device can obtain the first sub-channel estimation result based on the least squares estimation.

[0192] As an example, when the first sub-channel estimation result is the channel estimation result of the reference signal sent by 64 antenna ports, the first sub-channel estimation result is the channel matrix corresponding to 64 antenna ports.

[0193] When P1 is less than M1, that is, when the network device sends a reference channel through some ports among 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 these P1 antenna ports, that is, the first sub-channel estimation result.

[0194] As an example, when M1 is 64, the terminal device measures the channel estimation results of 40 antenna ports on the first resource, and thus feeds back the channel estimation results of 40 ports to the network device, that is, P1 = 40.

[0195] For example, when M1 is equal to 64 and P1 is equal to 40, the network device can determine the channel estimation results of these 64 antenna ports based on the channel estimation results of these 40 antenna ports.

[0196] 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 the channel estimation auxiliary information corresponding to these M1 antenna ports.

[0197] First, the relevant knowledge based on the channel estimation auxiliary information is introduced below. The channel estimation auxiliary information can be obtained based on the channel matrix. Exemplarily, the channel matrix is denoted as H, and the dimension of this channel matrix H is N RE ×N TX , N RE represents the number of resource elements (REs) transmitting reference signals in the resource, and N TX represents the number of antenna ports supported by the resource, that is, the number of ports of the reference signal. This channel matrix can be, for example, the channel matrix of the downlink channel obtained by estimating the uplink channel according to the uplink-downlink reciprocity, or the channel matrix according to the channel matrix in the historical period, or the channel matrix predicted by an artificial intelligence (AI) model. This application does not make any limitations in this regard.

[0198] Figure 5 Exemplarily, the channel estimation auxiliary information is shown. Exemplarily, performing a singular value decomposition (SVD) on the channel matrix to obtain the spatio-frequency domain projection matrix V of the channel matrix H , this matrix V H is a matrix composed of R row vectors in the right unitary matrix obtained by performing SVD on the channel matrix, and R is the rank of this channel matrix. The matrix V H has a dimension of R×N TX . Obtaining a maximum linearly independent group of column vectors from V H to obtain the matrix P aug , whose dimension is N TX ×N aug , N aug is a positive integer less than or equal to N TX . As shown in the figure, the matrix P aug includes N aug non-zero elements, and each non-zero element is located in one column of the matrix P aug , and other elements are all zero, indicating that N TX relatively important ports are selected from N aug ports to transmit reference signals. This matrix P aug can indicate the indexes of N aug ports among N TX ports. Therefore, this matrix P aug can also be called the port pattern for indicating the reference signal. Then from VH and P aug Channel estimation auxiliary information P can be obtained + , P + satisfies: (V H P aug ) -1 V H , whose dimension is N aug ×N TX .

[0199] It is not difficult to see that although the number of ports of the transmitted reference signal can be less than N TX , but based on this channel estimation auxiliary information P + , the channel matrix of N TX ports can be reconstructed. One of the reconstruction expressions is as follows:

[0200]

[0201] where H' represents the channel matrix of the antenna ports actually transmitting the reference signal, represents the channel matrix of N TX 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 can be the channel estimation result of all or part of the antenna ports among M2 antenna ports.

[0204] In some implementation manners, the second sub-channel estimation result can be referred to as the channel estimation result of P2 antenna ports among M2 antenna ports, where P2 is a positive integer less than or equal to M2. Among them, P2 is a positive integer, and P2 can be equal to M2 or less than M2.

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

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

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

[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 thus 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 may determine the channel estimation results of these 128 antenna ports based on the channel estimation results of these 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 manners are as follows: determining the channel estimation results of M2 antenna ports based on the channel estimation results of P2 antenna ports and the channel estimation auxiliary information corresponding to these M2 antenna ports.

[0211] When determining the channel estimation results of M2 antenna ports based on the channel estimation results of P2 antenna ports and the channel estimation auxiliary information corresponding to these M2 antenna ports, one implementation manner may refer to the foregoing implementation manner of determining the channel estimation results based on the channel estimation auxiliary information, which will not be elaborated herein.

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

[0213] In this embodiment, optionally, S305 may further be included, that is, the terminal device reports the capabilities supported by the terminal device. The capabilities supported by the terminal may include at least one of the following capabilities: whether to support the splicing of channel estimation results, the maximum number of antenna ports that can be spliced, the maximum number of resources that can be spliced, 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.

[0214] An example of the scenario for supporting splicing is as follows: The base station has multiple antenna panels, and there are a large number of antenna ports in each panel.

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

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

[0217] An example diagram of the splicing time span supported by the terminal device is as Figure 6As shown in the figure. Among them, t1 represents the time of the earliest time-domain resource among the resources for splicing, Kmax represents the maximum number of resources for splicing, tKmax represents the time of the latest time-domain resource among the resources 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 the channel estimation results of a larger number of antenna ports based on the channel estimation results of a smaller number of antenna ports.

[0221] In the method of this embodiment, indicating the resources that can be spliced, or the antenna ports that can be spliced, or the channel estimation results that can be spliced to the terminal device based on the second information can enable 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 a larger number of 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 the channel estimation results of fewer antenna ports in scenarios where the channel estimation results of a larger number of antenna ports are required, thereby saving signaling overhead.

[0223] Figure 7 It is a schematic flowchart of a communication method provided in another embodiment of the present application.

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

[0225] In this embodiment, this step can refer to S310 and will not be elaborated 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 the 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 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 antenna ports of the first antenna port. Correspondingly, the terminal device receives the second information.

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

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

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

[0234] In this embodiment, for the terminal device to determine the first sub-channel estimation result, reference may be made to the implementation manner in which the network device determines the first sub-channel estimation result in S390 and will not be elaborated here.

[0235] S750, the network device sends fourth information to the terminal device, where 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. Correspondingly, the terminal device receives the fourth information.

[0236] The difference between this step and S330 may include: the fourth information further includes the 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 the channel estimation auxiliary information corresponding to the 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 elaborated here.

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

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

[0241] In S770, the network device sends the second reference signal based on the second resource. Accordingly, the terminal device receives the second reference signal based on the second resource.

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

[0243] In S780, the terminal device determines the second sub-channel estimation result, where the second sub-channel estimation result is the channel estimation result of the 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 based on the second resource to obtain the second sub-channel estimation result.

[0245] In this embodiment, for the terminal device to determine the second sub-channel estimation result, reference can be made to the implementation manner in S390 where the network device determines the second sub-channel estimation result based on the second sub-channel estimation result, and details will not be elaborated here.

[0246] In 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] Among them, the terminal device determines the first channel estimation result 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 manner can refer to the implementation manner in S390 where the network device determines the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result, and details will not be elaborated here.

[0249] In this step, the connection rule or reference port used by the terminal device when determining the first channel estimation result based on the first sub-channel estimation result and the second sub-channel estimation result can be pre-configured based on the communication standard, or can be configured based on the 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 elaborated here.

[0251] It can be understood that Figure 3 and Figure 7 in the illustrated embodiment, only the content of splicing the channel estimation result based on two resources, or rather, based on two channel estimation results is shown. However, the technical solution of this application is not limited to splicing only two resources or two channel estimation results. In some embodiments of this application, splicing can be performed on a larger number of resources or a larger number of channel estimation results.

[0252] Figure 8 is a schematic structural diagram of a communication device according to an embodiment of this application. As Figure 8 shown, the device 800 may include a processing module 801 and a communication module 802.

[0253] As a first example, the device 800 may be used to implement Figure 3 and Figure 7 any communication method implemented by a terminal in the illustrated embodiment. For example, the processing module 801 is used to implement Figure 3 and Figure 7 any processing-related steps performed by the terminal device in the illustrated embodiment, and the communication module 802 is used to implement Figure 3 and Figure 7 any sending and / or receiving steps performed by the terminal device in the illustrated embodiment.

[0254] As a second example, the device 800 may be used to implement Figure 3 and Figure 7 any communication method implemented by a network device in the illustrated embodiment. For example, the processing module 801 is used to implement Figure 3 and Figure 7 any processing-related steps performed by the network device in the illustrated embodiment, and the communication module 802 is used to implement Figure 3 and Figure 7 any sending and / or receiving steps performed by the network device in the illustrated embodiment.

[0255] Figure 9 is a schematic structural diagram of a communication device provided by another embodiment of this application. As Figure 9As shown, 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 can be understood that the communication circuit 902 can be a transceiver or an input / output interface. Optionally, the device 900 may further include a memory 903 for storing instructions executed by the processor 901 or for storing input data required for the processor 901 to run instructions or for storing data generated after the processor 901 runs instructions. It can be 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] The device 900 can be a communication device or a chip applied in a communication device. For example, the device 900 can be a UE or a chip applied in a UE, and can be a network device or a chip applied in a network device. It can be understood that when the device 900 is a UE or a network device, the communication circuit 902 can be a transceiver.

[0258] In some embodiments of the present application, a computer program product is further provided. When the computer program product runs on a processor, it can implement the methods implemented by the terminal device in any of the above embodiments, or can implement the methods 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 further provided. The computer-readable storage medium contains computer instructions. When the computer instructions run on a processor, they can implement the methods implemented by the terminal device in any of the above embodiments, or can implement the methods implemented by the network device in any of the above method embodiments.

[0260] In some embodiments of the present application, a communication system is further provided. The system can implement the methods implemented by the terminal device and the network device in any of the above embodiments.

[0261] It can be understood that the processor in the embodiments of the present application may be the following devices or all or part of the circuits for processing functions in the following devices: a central processing unit (CPU), and may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0262] The method steps in the embodiments of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, removable hard disks, CD-ROMs, 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 may also be a component of the processor. The processor and the storage medium may be located in an ASIC. Additionally, the ASIC may be located in a network device or a terminal device. Of course, the processor and the storage medium may also exist as discrete components in the network device or the terminal device.

[0263] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part 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 executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive.

[0264] In various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0265] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The magnitude of the sequence numbers of the above processes does not mean the order of execution. The order of execution of each process should be determined by its function and internal 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, characterized in that, 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, wherein The method further includes: Sending seventh information indicating the first channel estimation result.

6. The method according to claim 5, characterized in that, 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 is for transmitting a reference signal and supports the M2 antenna ports, and the sorting relationship between the first resource and the second resource is predefined or configured by a second communication device for the first communication device.

8. The method according to claim 5, characterized in that, 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, and the third resource is used to transmit a reference signal. 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, and 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, and the first resource is used to transmit a reference signal. 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, characterized in that, 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, where the second resource is used to send a reference signal, and the second resource supports M2 antenna ports, and M2 is a positive integer; Sending fifth information, where 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 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, where the seventh information indicates the first channel estimation result.

17. The method according to claim 16, characterized in that 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 send 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, characterized in that, 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 in 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, 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.

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, where the third resource is used to send a reference signal, and 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 through all or part of the M1 antenna ports based on the first resource; Send a second reference signal through all or part of the M3 antenna ports based on the third resource; 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 the 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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