Communication method and device

Abstract

A communication method and apparatus, relating to the field of communications, the method comprising: an access network device sending first information, the first information comprising K parameters, the K parameters being in one-to-one correspondence with K ports included in a second reference signal resource, the K ports belonging to M ports included in a first reference signal resource, the ith parameter in the K parameters indicates the correlation between the ith port of the reference signal processed by the first precoding matrix and the ith port of the reference signal processed by the second precoding matrix. And the access network equipment sends the first reference signal on the first reference signal resource and receives a second measurement result, and the second measurement result corresponds to the second reference signal resource. By adopting the method, the access network equipment can obtain the corresponding measurement result without sending the corresponding reference signal on the second reference signal resource, so that the pilot frequency resource overhead can be saved, and the energy conservation of the access network equipment is facilitated.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular to a communication method and apparatus. Background Technology

[0002] With the gradual evolution of communication systems, "low carbon" has received increasing attention in communication networks. Among these, how to reduce the power consumption of base stations has become a growing concern.

[0003] With the evolution of cellular communication technology, the spectrum used is becoming wider and wider, and the number of transmitting antennas in base stations is also increasing, leading to higher power consumption. To address this, researchers have proposed a method of dynamically shutting down some transmitting antennas to save base station power. When some antennas are turned off, the number of antennas used by the base station to transmit reference signals decreases.

[0004] Currently, based on different antenna shutdown patterns, base stations need to send corresponding channel state information reference signals (CSI-RS) for each shutdown pattern, which will result in high overhead of pilot resources and is not conducive to energy saving of base stations. Summary of the Invention

[0005] This application provides a communication method and apparatus to reduce pilot resource overhead.

[0006] In a first aspect, this application provides a communication method, which includes: the method can be applied to a network side, such as an access network device on the network side, a module (e.g., a circuit, chip, or chip system) in the access network device, or a logical node, logical module, or software that can implement all or part of the functions of the access network device. Taking the application of this method to an access network device as an example, in this method, the access network device sends first information, the first information including K parameters, the K parameters corresponding one-to-one with K ports included in a second reference signal resource, the K ports belonging to M ports included in the first reference signal resource, the i-th parameter among the K parameters indicating the correlation between the i-th port of a reference signal processed by a first precoding matrix and the i-th port of the reference signal processed by a second precoding matrix, the first precoding matrix corresponding to the first reference signal resource, the second precoding matrix corresponding to the second reference signal resource, M greater than or equal to K, i less than or equal to K, and i, K, and M are all positive integers; the access network device sends a first reference signal on the first reference signal resource and receives a second measurement result, the second measurement result corresponding to the second reference signal resource.

[0007] Using the above method, access network equipment can obtain the corresponding second measurement results without sending the corresponding reference signal on the second reference signal resource, thereby saving pilot resource overhead and facilitating energy saving of access network equipment.

[0008] In one possible design, the access network device sends a second message indicating K ports out of the M ports.

[0009] In one possible design, the i-th parameter includes the amplitude correlation coefficient corresponding to the i-th port and the phase correlation coefficient corresponding to the i-th port.

[0010] In one possible design, the i-th parameter is a complex value or a polarization value.

[0011] In one possible design, the K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

[0012] In one possible design, the K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, and X is the number of transmission channels corresponding to the second reference signal resource, wherein I, J and K are all positive integers, and I ≥ J > K.

[0013] Secondly, this application provides a communication method that can be applied to the terminal side, such as a terminal or a communication module / processing module in the terminal, or a circuit or chip in the terminal responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip), or a circuit or chip in the terminal responsible for processing functions (such as a graphics processing unit). Taking a terminal as an example, the method involves the terminal receiving first information, which includes K parameters. Each of the K parameters corresponds to one of the K ports included in the second reference signal resource. The K ports belong to the M ports included in the first reference signal resource. The i-th parameter among the K parameters indicates the correlation between the i-th port of a reference signal processed by a first precoding matrix and the i-th port of the reference signal processed by a second precoding matrix. The first precoding matrix corresponds to the first reference signal resource, and the second precoding matrix corresponds to the second reference signal resource. M is greater than or equal to K, i is less than or equal to K, and i, K, and M are all positive integers. The terminal receives a first reference signal on the first reference signal resource and determines a first measurement result based on the first reference signal. The terminal also determines a second measurement result based on the first measurement result and the first information. The second measurement result corresponds to the second reference signal resource, and the terminal sends the second measurement result.

[0014] Using the above method, the terminal can determine the second measurement result corresponding to the second reference signal resource based on the first measurement result and the first information without receiving the corresponding reference signal on the second reference signal resource. This can save pilot resource overhead and help access network equipment save energy.

[0015] In one possible design, the terminal receives second information, which is used to indicate K ports out of the M ports.

[0016] In one possible design, the first measurement result includes matrices corresponding to the M ports respectively; when determining the second measurement result based on the first measurement result and the first information, the terminal determines the matrices corresponding to the K ports respectively from the matrices corresponding to the M ports respectively; and determines the second measurement result based on the matrices corresponding to the K ports respectively and the K parameters.

[0017] In one possible design, when determining the second measurement result based on the matrices corresponding to the K ports and the K parameters, the terminal determines the second measurement result based on the product of the matrix corresponding to each port and the parameter corresponding to the corresponding port.

[0018] In one possible design, the i-th parameter includes the amplitude correlation coefficient and the phase correlation coefficient.

[0019] In one possible design, the i-th parameter is a complex value or a polarization value.

[0020] In one possible design, the K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

[0021] In one possible design, the K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, and X is the number of transmission channels corresponding to the second reference signal resource, wherein I, J and K are all positive integers, and I ≥ J > K.

[0022] Thirdly, this application provides a communication device, which includes a transceiver unit and a processing unit. The processing unit controls the transceiver unit to perform operations. The transceiver unit is used to transmit first information, the first information including K parameters, the K parameters corresponding one-to-one with K ports included in a second reference signal resource, the K ports belonging to M ports included in the first reference signal resource, the i-th parameter among the K parameters indicating the correlation between the i-th port of a reference signal after processing by a first precoding matrix and the i-th port of the reference signal after processing by a second precoding matrix, the first precoding matrix corresponding to the first reference signal resource, the second precoding matrix corresponding to the second reference signal resource, M greater than or equal to K, i less than or equal to K, and i, K, and M are all positive integers; transmit a first reference signal on the first reference signal resource; and receive a second measurement result, the second measurement result corresponding to the second reference signal resource.

[0023] In one possible design, the transceiver unit is used to send second information, which is used to indicate K ports out of the M ports.

[0024] In one possible design, the i-th parameter includes the amplitude correlation coefficient corresponding to the i-th port and the phase correlation coefficient corresponding to the i-th port.

[0025] In one possible design, the i-th parameter is a complex value or a polarization value.

[0026] In one possible design, the K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

[0027] In one possible design, the K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, and X is the number of transmission channels corresponding to the second reference signal resource, wherein I, J and K are all positive integers, and I ≥ J > K.

[0028] Fourthly, this application provides a communication device, which includes a transceiver unit and a processing unit. The transceiver unit is used to receive first information, the first information including K parameters, the K parameters corresponding one-to-one with K ports included in a second reference signal resource, the K ports belonging to M ports included in the first reference signal resource, the i-th parameter among the K parameters indicating the correlation between the i-th port of a reference signal processed by a first precoding matrix and the i-th port of the reference signal processed by a second precoding matrix, the first precoding matrix corresponding to the first reference signal resource, the second precoding matrix corresponding to the second reference signal resource, M greater than or equal to K, i less than or equal to K, and i, K, and M are all positive integers; the transceiver unit is used to receive a first reference signal on the first reference signal resource; the processing unit is used to determine a first measurement result based on the first reference signal; determine a second measurement result based on the first measurement result and the first information, the second measurement result corresponding to the second reference signal resource; the transceiver unit is used to transmit the second measurement result.

[0029] In one possible design, the transceiver unit is configured to receive second information, which is used to indicate K ports out of the M ports.

[0030] In one possible design, the first measurement result includes matrices corresponding to the M ports respectively; the processing unit is configured to determine the matrices corresponding to the K ports respectively from the matrices corresponding to the M ports respectively when determining the second measurement result based on the first measurement result and the first information; and to determine the second measurement result based on the matrices corresponding to the K ports respectively and the K parameters.

[0031] In one possible design, the processing unit is configured to determine the second measurement result based on the product of the matrix corresponding to each port and the parameter corresponding to the corresponding port when determining the second measurement result based on the matrices corresponding to the K ports and the K parameters respectively.

[0032] In one possible design, the i-th parameter includes the amplitude correlation coefficient and the phase correlation coefficient.

[0033] In one possible design, the i-th parameter is a complex value or a polarization value.

[0034] In one possible design, the K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

[0035] In one possible design, the K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, and X is the number of transmission channels corresponding to the second reference signal resource, wherein I, J and K are all positive integers, and I ≥ J > K.

[0036] Fifthly, this application provides a communication device, which may be a first device, or a module or unit (e.g., a chip, a chip system, or a circuit) in the first device that performs the methods / operations / steps / actions described in any of the first or second aspects above, or a device that can be used in conjunction with the first device.

[0037] In a sixth aspect, this application provides a communication device including at least one processing element, wherein at least one storage element is used to store programs and data, the at least one processing element being used to read and execute the programs and data stored in the storage element so that the method described in any of the foregoing aspects of this application is implemented.

[0038] In one possible design, the communication device further includes the at least one storage element.

[0039] In a seventh aspect, this application also provides a computer program that, when run on a computer, causes the computer to perform the method described in any of the preceding aspects.

[0040] Eighthly, this application provides a communication device comprising: an interface circuit and at least one processor; the interface circuit being configured to provide input and / or output of a program or instructions to the at least one processor; the at least one processor being configured to execute the program or instructions such that the communication device can implement the method described in any of the preceding aspects.

[0041] In one possible embodiment, the communication device includes at least one memory for storing the program or instructions.

[0042] Ninthly, this application provides a computer storage medium storing a software program that, when read and executed by one or more processors, can implement the method described in any one of the preceding aspects.

[0043] In a tenth aspect, this application provides a computer program product containing instructions that, when executed on a computer, cause the computer to perform the method described in any one of the preceding aspects.

[0044] Eleventhly, this application provides a chip system comprising at least one chip and a memory, wherein the at least one chip is used to read and execute a program stored in the memory to implement the method described in any one of the preceding aspects.

[0045] In a twelfth aspect, this application provides a communication system comprising at least one terminal and an access network device, the access network device being configured to perform the method described in any one of the first aspects above, and the terminal being configured to perform the method described in any one of the second aspects above.

[0046] Based on the implementations provided in the above aspects, this application can be further combined to provide more implementations. Attached Figure Description

[0047] Figure 1 A possible, non-limiting system schematic diagram is shown;

[0048] Figure 2 A schematic diagram of a possible baseband hardware implementation in a terminal or access network device is shown.

[0049] Figure 3 A schematic diagram of a possible ORAN architecture is shown;

[0050] Figure 4 A flowchart outlining a communication method is shown.

[0051] Figure 5 A schematic diagram of the structure of a communication device is shown;

[0052] Figure 6 A schematic diagram of another communication device is shown. Detailed Implementation

[0053] The specific implementations of this application are described below with reference to the accompanying drawings in the embodiments. However, the implementations of this application may also include combining these embodiments without departing from the spirit or scope of this application, such as using other embodiments and making structural changes. Therefore, the detailed description of the following embodiments should not be understood in a limiting sense. The terminology used in the embodiment section of this application is only used to explain the specific embodiments of this application and is not intended to limit this application.

[0054] Figure 1 This is a schematic diagram illustrating one possible, non-limiting system. For example... Figure 1 As shown, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. RAN 100 includes at least one RAN node (e.g., ...). Figure 1 110a and 110b (collectively referred to as 110) and at least one terminal (such as Figure 1 RAN 100, denoted as RAN 120a-120j, is collectively referred to as RAN 120. RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 1 (Not shown in the image). Terminal 120 is connected to RAN node 110 wirelessly. RAN node 110 is connected to core network 200 wirelessly or via wired connection. The core network equipment in core network 200 and RAN node 110 in RAN 100 can be different physical devices, or they can be the same physical device integrating core network logical functions and radio access network logical functions.

[0055] RAN 100 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or future-oriented evolution systems. RAN 100 can also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. RAN 100 can also be a communication system that integrates two or more of the above systems.

[0056] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, constitutes part of the communication system and assists terminals in achieving wireless access. Multiple RAN nodes 110 in communication system 10 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative, for example... Figure 1 Network element 120i can be a helicopter or a drone, and it can be configured as a mobile base station. For terminals 120j that access RAN 100 through network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes referred to as communication devices, for example... Figure 1 Network elements 110a and 110b can be understood as communication devices with base station functions, while network elements 120a-120j can be understood as communication devices with terminal functions.

[0057] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a WiFi system, etc. Figure 1 110a), micro base stations or indoor stations (such as Figure 1The RAN node can be a relay node or donor node (as described in section 110b), or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, wearable device, vehicle, or in-vehicle equipment. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU). All or part of the functions of the RAN node in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (e.g., a cloud platform). The RAN node can also be equipped with communication modules, circuits, or chips that perform corresponding communication functions. The RAN node can also be configured with program instructions for performing corresponding communication functions and corresponding program instructions. The RAN node in this application can also be a logical node, logical module, or software capable of implementing all or part of the RAN node functions.

[0058] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0059] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0060] It is understood that RAN nodes can be described in different ways. Unless otherwise specified in this application, the term "access network device" will be used.

[0061] A terminal can be a device or module that accesses the aforementioned communication system and has corresponding communication functions. A terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, transportation vehicles with wireless communication capabilities, communication modules, etc. The embodiments of this application do not limit the device form of the terminal. A terminal typically contains a communication module, circuit, or chip that performs the corresponding communication function. The terminal can also be configured with program instructions for performing the corresponding communication function.

[0062] like Figure 2 The diagram illustrates a possible baseband hardware implementation in a terminal or access network device, where the baseband can be implemented using a processing system including one or more processors. Processors include microprocessors (e.g., x86, ARM), microcontrollers, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), GPUs, programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to various functions. In other words, the processor used in the baseband can be used to implement the processes described below and any one or more steps within those processes.

[0063] Processing systems can be implemented using a bus architecture, typically represented by a bus. A bus can include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of the processing system. A bus can couple various circuits together, including one or more processors (typically represented by a processor), memory, and computer-readable medium. A bus can also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, and therefore will not be described further. A bus interface provides the interface between the bus and transceivers, as well as between the bus and the interface.

[0064] A transceiver provides a communication interface or means for communicating with various other devices via a wireless transmission medium. The transceiver may be coupled to an antenna array, and the transceiver and antenna array may be used together for communication with a corresponding network type. At least one interface (e.g., a network interface and / or a user interface) provides a communication interface or means for communication via an internal bus or via an external transmission medium.

[0065] The processor is responsible for managing the bus and general processing, including executing software stored on a computer-readable medium. When executed by the processor, this software causes the processing system to perform the various functions described below for any particular device. Functions that can be implemented by the processor, memory, and computer-readable medium include: encoding, decoding, rate matching, rate dematching, scrambling, descrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), inverse discrete Fourier transform (IDFT), precoding, resource element (RE) mapping, channel equalization, RE demapping, digital beamforming (BF), adding a cyclic prefix (CP), removing CP, and so on.

[0066] like Figure 3The diagram illustrates a possible ORAN architecture. This architecture includes a service management and orchestration framework (SMO) and a RAN intelligent controller (RIC). The RIC includes near-real-time (NRT) RICs and non-real-time (Non-RT) RICs. The SMO functions similarly to network management. The non-real-time RIC, residing within the SMO, implements non-real-time intelligent management of RAN functions, enabling artificial intelligence (AI) / machine learning (ML) workflows including model training and updates, and guiding applications / functions within the near-real-time RIC based on policies. The near-real-time RIC enables near-real-time intelligent management of the RAN, achieving near-real-time control and optimization of ORAN modules and resources through data collection and related operations via the E2 interface.

[0067] In addition, the architecture includes, but is limited to, the following modules:

[0068] O-RAN central unit (O-CU): Used to implement the radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, service data adaptation protocol (SDAP) layer, and other control functions in the 3GPP standard.

[0069] O-RAN central unit control plane (O-CU-CP): Similar to the CU-CP in the NR system, it is used to implement the functions of the RRC layer and the control plane functions of the PDCP layer. O-CU-CP is a part of O-CU.

[0070] O-RAN Central Unit User Plane (O-CU-UP): Similar to the CU-UP in the NR system, it is used to implement the functions of the SDAP layer and the user plane functions of the PDCP layer. O-CU-UP is a part of O-CU.

[0071] O-RAN distributed unit (O-DU): Based on low-layer function partitioning, it is used to implement the radio link control (RLC) layer, media access control (MAC) layer, and higher physical layer (Higher PHY) layer in the 3GPP standard. The higher physical layer functions include one or more of the following: forward error correction (FEC) encoding / decoding, scrambling / descrambling, or modulation / demodulation.

[0072] The O-RAN radio unit (O-RU) is based on low-layer function segmentation and is used to implement lower physical layer (Lower PHY) functions and radio frequency (RF) functions in the 3GPP standard. These lower PHY functions include one or more of the following: FFT / IFFT transformation, digital beamforming, or extraction and filtering of the physical random access channel (PRACH). It is similar to the TRP or remote radio head (RRH) in 3GPP, but includes lower PHY functions such as FFT / IFFT or PRACH extraction.

[0073] O-RAN Cloud (O-Cloud): As a cloud computing platform, it includes physical infrastructure nodes for hosting O-RAN functions such as RIC and O-DU; it supports software components (such as operating systems, virtual machine monitoring, container runtimes), management and orchestration functions.

[0074] The relevant terms used in the embodiments of this application will be explained below. It should be noted that these explanations are for the purpose of making the embodiments of this application easier to understand, and should not be regarded as a limitation on the scope of protection claimed by this application.

[0075] (1) Reference signal

[0076] A reference signal is a known signal provided by the transmitter to the receiver for channel estimation or channel sounding. The reference signal involved in the embodiments of this application is used for downlink channel estimation and can also be referred to as a downlink reference signal. Optionally, the reference signal can also be described as a pilot signal.

[0077] For example, the downlink reference signal may include a channel state information reference signal (CSI-RS), etc. Specific application scenarios are illustrated below:

[0078] In frequency division duplex (FDD) communication scenarios, because uplink and downlink channels lack reciprocity or cannot guarantee reciprocity, access network equipment typically sends a Channel State Information (CSI-RS) message to the terminal. The terminal performs channel estimation based on the received CSI-RS, such as estimating the downlink channel's channel state information (CSI) through channel measurement and interference measurement. The terminal then feeds back the CSI to the access network equipment, which can then use this CSI to determine the allocation of downlink data channel resources, modulation and coding scheme (MCS), and precoding configurations for the terminal. CSI can be understood as a type of channel information, reflecting channel characteristics and quality. Channel information can also be called channel response. For example, CSI can be represented using a channel matrix, such as including the channel matrix, or it can be composed of the channel's feature vectors.

[0079] For example, the terminal's feedback of CSI to the access network device may include: the terminal sending feedback quantities such as rank indicator (RI), channel quality indicator (CQI), and precoding matrix indicator (PMI) to the access network device. Here, RI indicates the downlink transmission layer number suggested by the terminal, CQI indicates the modulation and coding schemes supported by the current channel conditions as determined by the terminal, and PMI indicates the precoding suggested by the terminal. The number of precoding layers indicated by PMI corresponds to RI.

[0080] (2) Transmitter (TX)

[0081] A radio frequency (RF) transmission channel is simply called a transmission channel. One transmission channel corresponds to one physical antenna port. The transmission channel receives baseband signals from the baseband chip, performs RF processing (such as up-conversion, amplification, and filtering) on ​​the baseband signals to obtain RF signals, and finally radiates these RF signals into space through the antenna. Specifically, a transmission channel may include one or more electronic devices such as an antenna switch, antenna tuner, power amplifier (PA), mixer, local oscillator (LO), and filter. These electronic devices can be integrated into one or more chips as needed. An antenna can sometimes be considered part of the transmission channel. In the embodiments of this application, antenna shutdown can also be referred to as transmission channel shutdown.

[0082] (3) Antenna port

[0083] Antenna ports can also be simply referred to as ports. Unless otherwise specified, antenna ports in the embodiments of this application refer to logical antenna ports, not physical antenna ports. An antenna port can be associated with one or more transmission channels. The signal on each antenna port is transmitted through one or more transmission channels associated with it. When an antenna port is associated with multiple transmission channels, the signal on that antenna port is weighted by weighting coefficients and then transmitted through the multiple transmission channels associated with it. It can also be understood that multiple physical antennas are weighted by weighting coefficients to form a logical antenna. The weighting coefficients here can be complex numbers or real numbers, and the weighting coefficients on different physical antennas may be the same or different. Each antenna port has corresponding time-frequency resources and a reference signal. The time-frequency resources corresponding to different antenna ports can be the same or different. For example, the reference signal transmitted by the access network device through antenna port A can be used by the terminal to estimate the characteristics of the wireless channel from antenna port A to the terminal. The characteristics of the wireless channel can be used by the terminal to estimate the physical channel transmitted through antenna port A, or to determine the modulation order, code rate, and other information during data transmission. A reference signal can correspond to one or more antenna ports, or it can be understood that a reference signal can be transmitted through one or more antenna ports.

[0084] (4) Reference signal resources

[0085] The reference signal resource may specifically include at least one of the following: time-frequency resources, antenna ports, power resources, and scrambling codes. Access network devices can transmit reference signals based on the reference signal resources, and terminals can receive reference signals based on the reference signal resources. In the embodiments of this application, one or more antenna ports corresponding to the reference signal resource can also be understood as one or more antenna ports included in the reference signal resource. For example, the access network device can instruct the terminal to perform relevant configurations for CSI reporting through RRC parameters, such as CSI-ReportConfig.

[0086] The reference signal involved in the embodiments of this application can be a channel state information-reference signal (CSI-RS). Correspondingly, the reference signal resource can be a CSI-RS resource.

[0087] In this application, "sending information" can be understood as one device sending information to another device, or it can also be understood as one logical module within a device sending information to another logical module. For example, "access network device sending information" can be understood as the access network device sending information to another device (such as a terminal), or it can be understood as logical module 1 in the access network device sending information to logical module 2 in the access network device.

[0088] In this application, "receiving information" can be understood as one device receiving information from another device, or it can also be understood as a logical module within a device receiving information from another logical module. For example, "access network device receiving information" can be understood as the access network device receiving information from another device (such as a terminal), or it can be understood as logical module 1 in the access network device receiving information from logical module 2 in the access network device.

[0089] In this application, phrases such as "sending information to... (e.g., a terminal)" or related illustrations in the accompanying drawings can be understood as indicating that the destination of the information is a terminal. This can include sending information directly or indirectly to a terminal. Similarly, phrases such as "receiving information from... (e.g., a terminal)," "receiving information from... (e.g., a terminal)," or "receiving information sent by (e.g., a terminal)," or related illustrations in the accompanying drawings, can be understood as indicating that the source of the information is a terminal. This can include receiving information directly or indirectly from a terminal. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be interpreted similarly and will not be elaborated further here.

[0090] The communication method and apparatus will be further described below with reference to the accompanying drawings. It is understood that in the following embodiments, the execution entities for the interactive illustration are described using access network equipment and terminals as examples. However, this application does not limit the execution entities for the interactive illustration. For example, the method executed by the access network equipment in this application can also be implemented by modules (e.g., circuits, chips, or chip systems) in the access network equipment, or by logical nodes, logical modules, or software that can implement all or part of the functions of the access network equipment; the method executed by the terminal in this application can also be implemented by the communication / processing module in the terminal, or by circuits or chips (such as modem chips (also known as baseband chips), or SoC chips containing modem cores, or SIP chips, or GPUs) in the terminal responsible for communication / processing functions.

[0091] like Figure 4 As shown, this application provides a communication method, which includes:

[0092] Step 400: The access network device sends the first information. Correspondingly, the terminal receives the first information from the terminal.

[0093] For example, the access network device sends the first information, which can also be replaced by the O-RU sending the first information.

[0094] The first information includes K parameters, each corresponding one-to-one with one of the K ports included in the second reference signal resource. These K ports belong to the M ports included in the first reference signal resource, where M is greater than or equal to K, and both K and M are positive integers.

[0095] In other words, the first reference signal resource includes M ports, and the second reference signal resource includes K ports from the aforementioned M ports. Alternatively, the K ports included in the second reference signal resource are a subset of the M ports included in the first reference signal resource. Or, both the first and second reference signal resources include the same K ports, and the second reference signal resource includes only K ports.

[0096] For example, the first reference signal resource includes 32 ports, and the second reference signal resource includes 16 ports, wherein the 16 ports in the second reference signal resource are 16 ports out of the 32 ports in the first reference signal resource. Furthermore, the first information includes 16 parameters, each of which corresponds one-to-one with one of the 16 ports in the second reference signal resource.

[0097] For example, the access network device can also send second information to the terminal, wherein sending the second information by the access network device can also be replaced by sending the second information by the O-RU.

[0098] The second information is used to indicate K ports out of M ports. It is understood that the first and second information can be carried in the same message or in two separate messages; this application does not limit this. For example, the first information may be the first downlink control information (DCI), and the second information may be the second DCI. Alternatively, the first and second information can be carried in two different information cells within a single DCI. Another example is that the first information is the first DCI, and the second information is carried via an RRC message. Yet another example is that the first information is carried via a first RRC message, and the second information is carried via a second RRC message; or, the first and second information can be carried in two different information cells within an RRC message. The RRC message can be an RRC reconfiguration message.

[0099] For example, the i-th parameter among the K parameters indicates the correlation between the i-th port of a reference signal processed by the first precoding matrix and the i-th port of a reference signal processed by the second precoding matrix. The first precoding matrix corresponds to the first reference signal resource, and the second precoding matrix corresponds to the second reference signal resource. i is less than or equal to K, and i is a positive integer. These K parameters can also be called K correlation parameters or K port correlation parameters, and this application does not limit them to these terms.

[0100] In one example, the i-th parameter includes the amplitude correlation coefficient and the phase correlation coefficient corresponding to the i-th port.

[0101] The i-th parameter can be a complex value. For example, the i-th parameter can be denoted as R. i R i =a i +b i *j. Where a i Let b be the amplitude correlation coefficient corresponding to the i-th port. i Let R be the phase correlation coefficient corresponding to the i-th port. At this point, the first information can indicate K complex values, for example, R1, R2, ..., R... K Alternatively, the first information could indicate K sets of coefficients, where each set includes an amplitude correlation coefficient and a phase correlation coefficient, for example, (a1, b1), (a2, b2)..., (a... K b K ).

[0102] Alternatively, the i-th parameter can be a polarization value. For example, the i-th parameter can be denoted as R. i R i ==A i *e^(B i *j). Among them, A iLet B be the amplitude correlation coefficient corresponding to the i-th port. i Let R be the phase correlation coefficient corresponding to the i-th port. At this point, the first information can indicate K complex values, for example, R1, R2, ..., R... K Alternatively, the first information could indicate K sets of coefficients, where each set includes an amplitude correlation coefficient and a phase correlation coefficient, for example, (A1, B1), (A2, B2)..., (A... K B K ).

[0103] For example, the K parameters are determined based on the quotient of a first precoding matrix and a second precoding matrix, wherein the first precoding matrix is ​​determined based on a first analog precoding matrix and a first digital precoding matrix, and the second precoding matrix is ​​determined based on a second analog precoding matrix and a second digital precoding matrix. It should be understood that the analog precoding matrix is ​​applied to the analog device portion of the access network device, and the digital precoding matrix is ​​applied to the digital device portion of the access network device.

[0104] For example, the first analog precoding matrix can be denoted as W I*J The first digital precoding matrix can be denoted as DFT. J*1 Where I is the maximum number of transmission channels of the access network equipment, J is the number of transmission channels corresponding to the first reference signal resource, and the second analog precoding matrix can be denoted as W. I*X The second digital precoding matrix can be denoted as DFT. X*1 Where X is the number of transmission channels corresponding to the second reference signal resource. That is, the K parameters can be determined based on (W). I*J *DFT J*1 ) / (W I*X *DFT X*1 The number of transmission channels corresponding to the first reference signal resource can be replaced with the number of transmission channels corresponding to the first shutdown pattern, where the first reference signal resource corresponds to the first shutdown pattern. Similarly, the number of transmission channels corresponding to the second reference signal resource can be replaced with the number of transmission channels corresponding to the second shutdown pattern, where the second reference signal resource corresponds to the second shutdown pattern. Where I, J, and K are all positive integers, and I ≥ J > K.

[0105] Understandably, the access network device can obtain the first precoding matrix and the second precoding matrix, and then determine K parameters based on the first and second precoding matrices. Each of the K parameters corresponds one-to-one with one of the K ports included in the second reference signal resource. Similarly, the access network device can also obtain the third precoding matrix corresponding to the third reference signal resource, and then determine S parameters based on the first and third precoding matrices. Each of the S parameters corresponds one-to-one with one of the S ports included in the third reference signal resource, where the S ports belong to the M ports included in the first reference signal resource, and S is a positive integer, S < M.

[0106] In other words, the access network device can send K parameters and a first reference signal on the first reference signal resource, without needing to send a second reference signal on the second reference signal resource. This allows the terminal to determine the measurement result for the second reference signal based on the measurement result for the first reference signal and the K parameters. See step 430 below for a detailed description. Similarly, the access network device can also send S parameters without needing to send a third reference signal on the third reference signal resource. This allows the terminal to determine the measurement result for the third reference signal based on the measurement result for the first reference signal and the S parameters.

[0107] For example, the access network device sends the first information, which can also be replaced by the O-RU sending the first information.

[0108] Step 410: The access network device transmits a first reference signal on the first reference signal resource. Correspondingly, the terminal receives the first reference signal from the access network device.

[0109] For example, the access network device transmits the first reference signal on the first reference signal resource, which can also be replaced by the O-RU transmitting the first reference signal on the first reference signal resource.

[0110] For example, the access network device can notify the terminal of the first reference signal resource via an RRC message. Then, the terminal can receive the first reference signal on the first reference signal resource.

[0111] Step 420: The terminal determines the first measurement result based on the first reference signal.

[0112] For example, the terminal can perform channel estimation based on the first reference signal, such as by estimating the first measurement result through channel measurement or interference measurement. For instance, assuming the first reference signal is the first CSI-RS, the terminal can determine the first CSI based on the received first CSI-RS.

[0113] Step 430: The terminal determines the second measurement result based on the first measurement result and the first information. The second measurement result corresponds to the second reference signal resource.

[0114] For example, the first measurement result can be represented as a matrix corresponding to each of the M ports. For instance, the first measurement result can be denoted as X, where X = {x1, x2, ..., x...} M Let x1 be the matrix corresponding to the first port out of the M ports, x2 be the matrix corresponding to the second port out of the M ports, and so on.

[0115] When determining the second measurement result based on the first measurement result and the first information, the terminal can first determine the matrix corresponding to each of the K ports from the matrices corresponding to the M ports respectively. For example, the terminal can determine the K ports out of the M ports based on the second information, and then select the matrix corresponding one-to-one with the K ports indicated by the second information from the matrices corresponding to the M ports respectively.

[0116] For example, assuming M = 32 and K = 8, the first measurement result can be denoted as X = {x1, x2, ..., x...} 32 Let the K ports be the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, and 15th ports out of 32 ports. The matrix corresponding to each of the K ports can be denoted as: X k X k ={x1,x3,x5,x7,x9,x 11 ,x 13 ,x 15}

[0117] Furthermore, the terminal can determine the second measurement result based on the matrices corresponding to the K ports and the K parameters indicated by the first information.

[0118] For example, the terminal can determine the second measurement result based on the product of the matrix corresponding to each port and the parameter corresponding to the corresponding port.

[0119] For example, referring to the previous example, if the matrices corresponding to the K ports are: X k ={x1,x3,x5,x7,x9,x 11 ,x 13 ,x 15 The K parameters can be denoted as R, R = {R1, R2, ..., R8}, where R1 corresponds to the first port in the second reference signal resource, that is, the first port in the 32 ports included in the first reference signal resource; R2 corresponds to the second port in the second reference signal resource, that is, the third port in the 32 ports included in the first reference signal resource, and so on.

[0120] The terminal can be based on X kThe second measurement result is determined by R, for example, the second measurement result is denoted as Y, Y = X. k Let R be the matrix of the first of the K ports, y1 = x1 * R1; y2 be the matrix of the second of the K ports, y2 = x3 * R2; y3 be the matrix of the third of the K ports, y3 = x5 * R3; y4 be the matrix of the fourth of the K ports, y4 = x7 * R4, and so on.

[0121] Step 440: The terminal sends the second measurement result. Correspondingly, the access network device receives the second measurement result from the terminal.

[0122] Therefore, the terminal can determine the second measurement result corresponding to the second reference signal resource based on the first measurement result and the first information without receiving the corresponding reference signal on the second reference signal resource. In other words, the access network device can obtain the corresponding second measurement result without sending the corresponding reference signal on the second reference signal resource, thereby saving pilot resource overhead and facilitating energy saving of the access network device.

[0123] It is understood that, in order to achieve the functions in the above embodiments, each communication device (e.g., a terminal or access network device) includes hardware structures and / or software modules corresponding to perform each function. Those skilled in the art should readily recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0124] Figure 5 and Figure 6 The diagram illustrates the possible communication devices provided in the embodiments of this application. These communication devices can be used to implement the functions of the various communication devices in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0125] like Figure 5 As shown, the communication device 500 includes a processing unit 510 and a transceiver unit 520.

[0126] When the communication device 500 is used to implement the function of the access network device in the above method embodiment:

[0127] The processing unit 510 controls the transceiver unit 520 to perform operations. The transceiver unit 520 is used to transmit first information, which includes K parameters. The K parameters correspond one-to-one with K ports included in the second reference signal resource. The K ports belong to M ports included in the first reference signal resource. The i-th parameter in the K parameters indicates the correlation between the i-th port of a reference signal after processing by the first precoding matrix and the i-th port of the reference signal after processing by the second precoding matrix. The first precoding matrix corresponds to the first reference signal resource, and the second precoding matrix corresponds to the second reference signal resource. M is greater than or equal to K, i is less than or equal to K, and i, K, and M are all positive integers. The transceiver unit 510 transmits a first reference signal on the first reference signal resource and receives a second measurement result, which corresponds to the second reference signal resource.

[0128] In one possible design, the transceiver unit 520 is used to send second information, which is used to indicate the K ports out of the M ports.

[0129] When the communication device 500 is used to implement the functions of the terminal in the above method embodiments:

[0130] The transceiver unit 520 is configured to receive first information, the first information including K parameters, each of which corresponds one-to-one with K ports included in the second reference signal resource. The K ports belong to M ports included in the first reference signal resource. The i-th parameter among the K parameters indicates the correlation between the i-th port of a reference signal processed by a first precoding matrix and the i-th port of the same reference signal processed by a second precoding matrix. The first precoding matrix corresponds to the first reference signal resource, and the second precoding matrix corresponds to the second reference signal resource. M is greater than or equal to K, i is less than or equal to K, and i, K, and M are all positive integers. The transceiver unit 520 is configured to receive a first reference signal on the first reference signal resource. The processing unit 510 is configured to determine a first measurement result based on the first reference signal; determine a second measurement result based on the first measurement result and the first information, the second measurement result corresponding to the second reference signal resource; and transmit the second measurement result.

[0131] In one possible design, the transceiver unit 520 is used to receive second information, which is used to indicate the K ports out of the M ports.

[0132] In one possible design, the first measurement result includes matrices corresponding to the M ports respectively; the processing unit 510 is configured to determine the matrices corresponding to the K ports respectively from the matrices corresponding to the M ports respectively when determining the second measurement result based on the first measurement result and the first information; and to determine the second measurement result based on the matrices corresponding to the K ports respectively and the K parameters.

[0133] In one possible design, the processing unit 510 is configured to determine the second measurement result based on the product of the matrix corresponding to each port and the parameter corresponding to the corresponding port when determining the second measurement result based on the matrices corresponding to the K ports and the K parameters respectively.

[0134] A more detailed description of the processing unit 510 and the transceiver unit 520 can be obtained directly from the relevant descriptions in the above method embodiments, and will not be repeated here.

[0135] like Figure 6 As shown, the communication device 600 includes a processor 610 and an interface circuit 620. The processor 610 and the interface circuit 620 are coupled to each other. It is understood that the interface circuit 620 can be a transceiver or an input / output interface. Optionally, the communication device 600 may also include a memory 630 for storing instructions executed by the processor 610, or storing input data required by the processor 610 to execute instructions, or storing data generated after the processor 610 executes instructions.

[0136] When the communication device 600 is used to implement the above method embodiment, the processor 610 is used to implement the function of the processing unit 510, and the interface circuit 620 is used to implement the function of the transceiver unit 520.

[0137] It is understood that the processor in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0138] This application provides another example of a device, the notification device including at least one processor and at least one memory, the at least one processor and the at least one memory coupled together, the at least one memory for storing instructions, which, when executed by the at least one processor, cause the communication device to perform the method described above. Taking a communication device including a processor and a memory as an example, such as... Figure 6 As shown, the communication device 600 includes a processor 610 and a memory 630. The processor 610 and the memory 630 are coupled. The memory 630 stores instructions. When the instructions stored in the memory 630 are executed by the processor 610, the communication device 600 executes the methods executed by the various communication devices in the above embodiments.

[0139] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in 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, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in the aforementioned terminal or access network device. The processor and storage medium can also exist as discrete components in the terminal or access network device.

[0140] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer 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 this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0141] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0142] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0143] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that, The method includes: Send first information, which includes K parameters. The K parameters correspond one-to-one with the K ports included in the second reference signal resource. The K ports belong to the M ports included in the first reference signal resource. The i-th parameter in the K parameters indicates the correlation between the i-th port of a reference signal after processing by the first precoding matrix and the i-th port of the reference signal after processing by the second precoding matrix. The first precoding matrix corresponds to the first reference signal resource, and the second precoding matrix corresponds to the second reference signal resource. M is greater than or equal to K, i is less than or equal to K, and i, K, and M are all positive integers. Transmit a first reference signal on the first reference signal resource; Receive a second measurement result, which corresponds to the second reference signal resource.

2. The method as described in claim 1, characterized in that, The method further includes: Send a second message, which is used to indicate the K ports out of the M ports.

3. The method as described in claim 1 or 2, characterized in that, The i-th parameter includes the amplitude correlation coefficient and the phase correlation coefficient corresponding to the i-th port.

4. The method as described in claim 3, characterized in that, The i-th parameter is a complex value or a polarization value.

5. The method according to any one of claims 1-4, characterized in that, The K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

6. The method as described in claim 5, characterized in that, The K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, X is the number of transmission channels corresponding to the second reference signal resource, I, J and K are all positive integers, and I≥J>K.

7. A communication method, characterized in that, The method includes: Receive first information, the first information includes K parameters, the K parameters correspond one-to-one with K ports included in the second reference signal resource, the K ports belong to M ports included in the first reference signal resource, the i-th parameter in the K parameters indicates the correlation between the i-th port of a reference signal after processing by the first precoding matrix and the i-th port of the reference signal after processing by the second precoding matrix, the first precoding matrix corresponds to the first reference signal resource, the second precoding matrix corresponds to the second reference signal resource, M is greater than or equal to K, i is less than or equal to K, and i, K and M are all positive integers; Receive the first reference signal on the first reference signal resource; The first measurement result is determined based on the first reference signal; A second measurement result is determined based on the first measurement result and the first information, and the second measurement result corresponds to the second reference signal resource; Send the second measurement result.

8. The method as described in claim 7, characterized in that, The method further includes: Receive second information, which is used to indicate K ports out of the M ports.

9. The method as described in claim 7 or 8, characterized in that, The first measurement result includes matrices corresponding to the M ports respectively; Determining the second measurement result based on the first measurement result and the first information includes: Determine the matrix corresponding to each of the K ports from the matrices corresponding to the M ports respectively; The second measurement result is determined based on the matrices corresponding to the K ports and the K parameters.

10. The method as described in claim 9, characterized in that, The second measurement result is determined based on the matrices corresponding to the K ports and the K parameters, including: The second measurement result is determined by the product of the matrix corresponding to each port and the parameter corresponding to the corresponding port.

11. The method according to any one of claims 7-10, characterized in that, The i-th parameter includes the amplitude correlation coefficient and the phase correlation coefficient.

12. The method as described in claim 11, characterized in that, The i-th parameter is a complex value or a polarization value.

13. The method according to any one of claims 7-12, characterized in that, The K parameters are determined based on the quotient of the first precoding matrix and the second precoding matrix.

14. The method as described in claim 13, characterized in that, The K parameters are based on (W) I*J *DFT J*1 ) / (W I*X *DFT X*1 The first precoding matrix is ​​determined based on the first analog precoding matrix W. I*J and the first digital precoding matrix DFT J*1 It is determined that the second precoding matrix is ​​based on the second analog precoding matrix W. I*X Second Digital Precoding Matrix (DFT) X*1 Determined, where I is the maximum number of transmission channels of the access network device, J is the number of transmission channels corresponding to the first reference signal resource, X is the number of transmission channels corresponding to the second reference signal resource, I, J and K are all positive integers, and I≥J>K.

15. A communication device, characterized in that, Includes units or modules for performing the method as described in any one of claims 1 to 14.

16. A communication device, characterized in that, The communication device includes at least one processor; the at least one processor is configured to perform the method as described in any one of claims 1 to 14.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a program that, when run on the device, causes the device to perform the method as described in any one of claims 1 to 14.

18. A computer program product, characterized in that, The computer program product includes a program or instructions that, when executed by a device, cause the device to perform the method as described in any one of claims 1 to 14.

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