Communication method and communication apparatus

Abstract

This application discloses a communication method and a communication device, applicable to the field of communication technology. The method includes: determining first channel state information; transmitting configuration information, which indicates the transmission period of a reference signal, the transmission period being determined based on the first channel state information, wherein the survival probability of a first scatterer is greater than or equal to a first threshold within a first period determined based on the transmission period, and the first scatterer is a scatterer in the first channel characterized by the first channel state information; receiving a first reference signal, which is a reference signal transmitted by a terminal within the first period; and determining second channel state information based on the first channel state information and the first reference signal. Implementing this application is beneficial for effectively improving the accuracy of channel measurement while reducing channel measurement power consumption.

Description

Technical Field

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

[0002] With the continuous evolution of mobile communication systems, the channel environment is becoming increasingly complex, placing more stringent demands on the channel measurement capabilities of terminals and access network equipment in terms of both accuracy and power consumption. However, improving the accuracy of channel measurements and reducing power consumption are often mutually restrictive. For example, simplifying the channel measurement process to reduce power consumption often results in a loss of accuracy; conversely, pursuing high accuracy in channel measurements can easily lead to increased power consumption. Therefore, how to effectively improve the accuracy of channel measurements while reducing power consumption is an urgent problem to be solved. Summary of the Invention

[0003] This application provides a communication method and a communication device, which can effectively improve the accuracy of channel measurement while reducing the power consumption of channel measurement.

[0004] Firstly, embodiments of this application provide a communication method, which can be executed by a network-side device. The network-side device can be an access network device, or a component within the access network device (e.g., a module, communication module, circuitry or chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip), or a logical node, logical module, or software capable of implementing all or part of the functions of the access network device. For ease of description, the following description uses an access network device as an example. The method includes:

[0005] The system determines first channel state information; sends configuration information indicating the transmission period of a reference signal, the transmission period being determined based on the first channel state information, wherein the survival probability of a first scatterer is greater than or equal to a first threshold within the first period determined based on the transmission period, and the first scatterer is the scatterer in the first channel characterized by the first channel state information; receives a first reference signal, the first reference signal being the reference signal transmitted by the terminal within the first period; and determines second channel state information based on the first channel state information and the first reference signal.

[0006] In the embodiments described in the first aspect, on one hand, the access network device determines the measurement result (i.e., second channel state information) of the current channel by fusing prior measurement results of historical channels (i.e., first channel state information) with real-time observation information of the current channel (i.e., first reference signal). Compared to the complete and complex channel measurement required solely relying on the first reference signal, this method effectively reduces computational complexity, thereby reducing the power consumption of channel measurement. On the other hand, the access network device flexibly determines the transmission period of the reference signal using the prior measurement results of historical channels (i.e., first channel state information) to ensure that most scatterers in the historical channels remain alive in the current channel within the first period, resulting in a high similarity between the current channel and the historical channels. This method is beneficial for effectively improving the accuracy of channel measurement while reducing the power consumption of channel measurement.

[0007] In one possible implementation, the first channel state information is used to indicate the distance, angle, and speed of the first scatterer relative to the access network device.

[0008] In this implementation, the distance, angle, and velocity of the first scatterer relative to the access network device can characterize the rate of change of the channel, thereby enabling the transmission period determined by the access network device based on the first channel state information to adapt to the stability of the channel, thus making the transmission period more accurate.

[0009] In one possible implementation, the survival probability of the first scatterer is related to the following parameters: the transmission period, the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, and the normalized parameter of the angle of the first scatterer relative to the access network device; wherein, the proportion of moving scatterers in the first channel is related to the velocity of the first scatterer relative to the access network device; and the weight parameter is related to the distance of the first scatterer relative to the access network device.

[0010] In this implementation, the survival probability of the first scatterer can be defined based on the above parameters (including the transmission period and other parameters). Through this definition, the survival probability of the first scatterer under different transmission periods can be determined, so that the access network device can determine a suitable transmission period based on the survival probability of the first scatterer under different transmission periods and the first threshold (such as the survival probability of the first scatterer under the determined transmission period being greater than or equal to the first threshold).

[0011] In one possible implementation, the first threshold is related to the following parameters: the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, the speed of the first scatterer relative to the access network device, and the reference speed; wherein the maximum value and the minimum value of the first threshold are both related to the distance of the first scatterer relative to the access network device.

[0012] In this implementation, a first threshold can be defined based on the above parameters, which can characterize the stability of the channel. Through this definition, the determined first threshold can be better adapted to the rate of change of the channel, thereby making the determined transmission period more appropriate.

[0013] In one possible implementation, the transmission period is related to the following parameters: the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, the normalized parameter of the angle of the first scatterer relative to the access network device, the maximum value of the first threshold, the minimum value of the first threshold, and the reference velocity; wherein, the proportion of moving scatterers in the first channel is related to the velocity of the first scatterer relative to the access network device; the weight parameter, the maximum value of the first threshold, and the minimum value of the first threshold are all related to the distance of the first scatterer relative to the access network device.

[0014] In this implementation, the transmission period can be defined based on the above parameters, which can characterize the stability of the channel. Through this definition, the determined transmission period can be made more suitable and adapted to the rate of change of the channel.

[0015] In one possible implementation, the first channel consists of a first line-of-sight (LoS) path and a first non-line-of-sight (NLoS) path. The first channel state information includes the angle, distance, and path gain of the first LoS path, as well as the angle, distance, and path gain of the first NLoS path. Determining the second channel state information based on the first channel state information and the first reference signal includes: determining the angle, distance, and path gain of the second LoS path based on the first channel state information and the first reference signal, and updating the path gain of the first NLoS path. The second channel state information includes the angle, distance, and path gain of the second LoS path, the angle and distance of the first NLoS path, and the updated path gain of the first NLoS path.

[0016] In this implementation, the majority of scatterers survive through the aforementioned transmission cycle, resulting in the paths of most scatterers remaining essentially unchanged in the current channel. Since most NLoS paths are paths of scatterers, while LoS paths are not, the access network device can reuse the angle and distance of the first LoS path in the first channel state information. That is, the access network device does not need to redetermine the angle and distance of the LoS path, which helps to reduce the power consumption of channel measurement.

[0017] In one possible implementation, determining the angle, distance, and path gain of the second LoS path based on the first channel state information and the first reference signal includes: determining parameter distribution information of the distance and angle of the terminal relative to the access network device in the first period based on the first channel state information; determining a search window for the second LoS path based on the parameter distribution information of the distance and angle of the terminal relative to the access network device in the first period and the operating parameter information of the access network device; and determining the angle, distance, and path gain of the second LoS path based on the search window of the second LoS path and the first reference signal.

[0018] In this implementation, the search window of the second LoS path determined by the access network device through the first channel state information is smaller than that of the full spectrum search window, which helps to reduce the search complexity of the access network device and thus reduce the power consumption of channel measurement.

[0019] In one possible implementation, the second channel state information further includes the angle, distance, and path gain of a third path, where the third path is an NLoS path generated by a second scatterer, and the second scatterer is a newly added scatterer in the second channel characterized by the second channel state information, excluding the first scatterer. The method further includes: determining a search window for the third path based on the operating parameters of the access network device; and determining the angle, distance, and path gain of the third path based on the search window of the third path, the angle, distance, and path gain of the second LoS path, the angle and distance of the first NLoS path, the updated path gain of the first NLoS path, and the first reference signal.

[0020] In this implementation, the access network device also determines the angle, distance, and path gain of the NLoS path (i.e., the third path) generated by the newly added scatterer in the current channel, which helps to make the determined second channel state information more accurate. At the same time, the search window of the third path determined by the access network device based on its own operating parameters is smaller than that of the full-spectrum search window, which helps to reduce the search complexity of the access network device, thereby reducing the power consumption of channel measurement.

[0021] Secondly, embodiments of this application provide a communication method, which can be executed by a terminal-side device. The terminal-side device can be a terminal, or a component within the terminal (e.g., a module, communication module, circuit or chip responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core), or a logical node, logical module, or software capable of implementing all or part of the terminal's functions. The method includes:

[0022] The system receives configuration information indicating the transmission period of a reference signal. This transmission period is determined based on first channel state information. Within the first period determined based on this transmission period, the survival probability of a first scatterer is greater than or equal to a first threshold. The first scatterer is the scatterer in the first channel characterized by the first channel state information. The system then transmits a first reference signal, which is the reference signal transmitted by the terminal within the first period. The first reference signal and the first channel state information are used to determine second channel state information.

[0023] In one possible implementation, the first channel state information is used to indicate the distance, angle, and speed of the first scatterer relative to the access network device.

[0024] In one possible implementation, the survival probability of the first scatterer is related to the following parameters: the transmission period, the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, and the normalized parameter of the angle of the first scatterer relative to the access network device; wherein, the proportion of moving scatterers in the first channel is related to the velocity of the first scatterer relative to the access network device; and the weight parameter is related to the distance of the first scatterer relative to the access network device.

[0025] In one possible implementation, the first threshold is related to the following parameters: the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, the speed of the first scatterer relative to the access network device, and the reference speed; wherein the maximum value and the minimum value of the first threshold are both related to the distance of the first scatterer relative to the access network device.

[0026] In one possible implementation, the transmission period is related to the following parameters: the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, the normalized parameter of the angle of the first scatterer relative to the access network device, the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, and the reference velocity; wherein, the proportion of moving scatterers in the first channel is related to the velocity of the first scatterer relative to the access network device; the weight parameter, the maximum value of the first threshold, and the minimum value of the first threshold are all related to the distance of the first scatterer relative to the access network device.

[0027] Thirdly, embodiments of this application provide a communication device for executing the method in any possible implementation of the first or second aspect. The communication device includes modules or units for executing the method in any possible implementation of the first or second aspect.

[0028] Fourthly, embodiments of this application provide a communication device including at least one processor. When the communication device is running, the processor executes a computer program or instructions to cause the communication device to perform a method as described in any possible implementation of the first or second aspect.

[0029] In one possible implementation, the communication device further includes a memory for storing computer programs or instructions.

[0030] In one possible implementation, the memory is located outside the aforementioned communication device.

[0031] In one possible implementation, the memory is located within the aforementioned communication device.

[0032] The processor and memory can also be integrated into a single device, meaning that the processor and memory can be combined together.

[0033] In one possible implementation, the communication device further includes a transceiver circuit for receiving information (or inputting information) or sending information (or outputting information).

[0034] Fifthly, embodiments of this application provide a chip including logic circuitry and an interface, the logic circuitry and the interface being coupled to enable the chip to perform methods as described in any possible implementation of the first or second aspect.

[0035] In a sixth aspect, embodiments of this application provide a computer-readable storage medium for storing a computer program or instructions that, when executed, cause the method shown in any possible implementation of the first or second aspect to be performed.

[0036] In a seventh aspect, embodiments of this application provide a computer program product, including a computer program or instructions, which, when executed, cause the method shown in any possible implementation of the first or second aspect to be performed. Attached Figure Description

[0037] Figure 1 This application provides a schematic diagram of the architecture of a communication system.

[0038] Figure 2 This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application;

[0039] Figure 3 A schematic diagram of the architecture of a communication method provided in an embodiment of this application;

[0040] Figure 4 A schematic diagram of a channel measurement provided in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0044] To facilitate understanding of the technical solution of this application, the application will be further described below with reference to the accompanying drawings.

[0045] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used only to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0046] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In this application, "at least one (item)" refers to one or more, "more than" refers to two or more, "at least two (items)" refers to two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. "Or" indicates that there can be two relationships, such as only A exists and only B exists; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A exists, only B exists, and both A and B exist simultaneously. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0048] In this application, "transmission" includes "sending" and / or "receiving".

[0049] In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of instructing A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A.

[0050] In this application, parameter A is related to parameters B and C, and it can be deduced that parameter A can be determined by parameters B and C.

[0051] The following describes the communication system involved in the embodiments of this application.

[0052] The technical solutions provided in this application can be applied to various communication systems, such as: 5th generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area network (WLAN) systems, satellite communication systems, future communication systems, or integrated systems of multiple systems. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0053] The method provided in this application can be applied between two entities in a communication system, such as one entity sending information to or receiving information sent by the other entity. In a wireless communication system, communication devices are included, and these devices can communicate wirelessly using air interface resources. Air interface resources may include at least one of time-domain resources, frequency-domain resources, code resources, and spatial resources; this application does not limit this. For example, the aforementioned two entities may include an access network device and a terminal device, or may include a chip that can be placed in the access network device and a chip that can be placed in the terminal device, etc. Of course, as standards advance, other types of entities may emerge subsequently; this application does not limit this.

[0054] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Figure 1 As shown, the communication system may include at least one access network device and at least one terminal, such as... Figure 1 Terminals 1 through 4 are shown in the diagram. The terminals can communicate with the access network equipment via an air interface Uu link or a non-terrestrial network (NTN) link. For example, terminals 3 and 4 can communicate via a D2D sidelink or similar method.

[0055] Figure 2This is a schematic diagram of the architecture of another communication system provided in an embodiment of this application. For example... Figure 2 As shown, the scenarios of the communication system may include at least one of scenario (a), scenario (b), scenario (c), or scenario (d). Scenario (a) is a point-to-point single connection between the access network device and the terminal; scenario (b) is a multi-hop single connection between the access network device and the terminal; scenario (c) is a point-to-point dual connectivity (DC) between the access network device and the terminal; and scenario (d) is a multi-hop dual connectivity between the access network device and the terminal.

[0056] Figure 1 An access network device and multiple terminals are illustrated as an example. Figure 2 Single-connection and dual-connection are illustrated exemplarily. In specific implementations, the communication system may also include a greater number of access network devices, and the coverage area of ​​each access network device may include a greater or lesser number of terminals; this application embodiment does not limit this. Figure 1 and Figure 2 The architecture shown is merely an example and does not impose limitations on the network architecture applicable to this application.

[0057] The following provides a detailed description of the terminal and access network equipment.

[0058] A terminal is a device with wireless transceiver capabilities. The terminal can communicate with RAN nodes (or wireless access devices, or access network devices as described below) in a radio access network (RAN). The terminal can also be referred to as user equipment (UE), access terminal, terminal equipment, subscriber unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent, or user device, etc. In one possible implementation, the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; or it can be deployed on water, including ships; or it can be deployed in the air, such as on airplanes, balloons, or satellites. In another possible implementation, the terminal can be a handheld device with wireless communication capabilities, vehicle-mounted device, wearable device, sensor, terminal in the Internet of Things (IoT), terminal in the Internet of Vehicles (IoV), drone, or any form of terminal in a 5G network or future network, etc., and this application embodiment does not limit this. In another possible implementation, the terminal can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in autonomous driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, or a wireless terminal in a smart home, etc.

[0059] In this application embodiment, the device for implementing the terminal's functions can be a terminal itself; it can also be a device capable of supporting the terminal in implementing those functions, such as a chip system. This device can be installed in the terminal or used in conjunction with the terminal. In this application embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. For ease of description, the technical solutions provided in this application embodiment will be described below using the example of a terminal as the device for implementing the terminal's functions.

[0060] An access network device can be a device deployed in a radio access network to provide wireless communication services to terminals. This access network device can also be called a network device, access device, or RAN device, etc. For example, an access network device can be a next-generation node B (gNB), a next-generation evolved node B (ng-eNB), or an access network device in future communications, etc. The access network device can be any device with wireless transceiver capabilities, including but not limited to the base stations mentioned above (including base stations deployed on satellites). The access network device can also be a device with base station functionality in future communication systems. As an example, the access network device can be an access node, wireless relay node, or wireless backhaul node in a wireless-fidelity (Wi-Fi) system. As another example, the access network device can be a wireless controller in a cloud radio access network (CRAN) scenario. As yet another example, the access network device can be a wearable device or in-vehicle device capable of providing wireless communication services, etc. As another example, the access network device can also be a small cell, a transmission reception point (TRP) (or a transceiver point), etc. The names of devices with access network functionality may differ in systems using different wireless access technologies; these will not be listed individually in the embodiments of this application.

[0061] Access network equipment can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile access network equipment, and one or more cells can move according to the location of the mobile access network equipment. In other examples, a helicopter or drone can be configured to be used as a device to communicate with another access network equipment.

[0062] In some deployments of access network equipment, the access network equipment can include centralized units (CUs) and distributed units (DUs). For example, some protocol layer functions of the access network equipment are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU, which is centrally controlled by the CU. In other deployments of access network equipment, the CU can also be divided into CU-control plane (CP) and CU-user plane (UP). In still other deployments of access network equipment, the access network equipment can also be an open radio access network (ORAN) architecture. When the access network equipment is an ORAN architecture, the access network equipment can be a functional entity or module in the ORAN. For example, the access network equipment can be one or more of CUs, DUs, or RUs. In an ORAN system, the CU can also be called an open (O)-CU, the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, and the CU-UP can also be called an O-CU-UP, etc. The deployment methods of access network devices listed herein are merely examples. As standard technologies evolve, access network devices may have other deployment forms, and this application does not limit them.

[0063] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing a portion of the access network's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or RUs. CUs and DUs can be configured separately or included in the same network element, such as an indoor 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 radioheads (RRHs).

[0064] RAN nodes can support one or more types of fronthaul interfaces, each corresponding to a DU and RU with different functions. If the fronthaul interface between the DU and RU is a Common Public Radio Interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and RU is another type of interface, relative to CPRI, it moves some downlink and / or uplink baseband functions—for example, for downlink, precoding, or one or more of inverse fast Fourier transform (IFFT) / adding a cyclic prefix (CP)—from the DU to the RU; and for uplink, digital beamforming, or one or more of fast Fourier transform (FFT) / removing CP—from the DU to the RU. In one possible implementation, this interface can be an enhanced common public radio interface (eCPRI). Under the eCPRI architecture, the partitioning methods between DU and RU are different, corresponding to different types (category, Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, F.

[0065] Taking eCPRI Cat A as an example, for downlink transmission, layer mapping is used as the dividing line. The DU is configured to implement one or more functions preceding layer mapping (i.e., coding, rate matching, scrambling, modulation, and layer mapping), while other functions following layer mapping (e.g., resource element (RE) mapping, digital beamforming, or IFFT / CP addition) are implemented in the RU. For uplink transmission, de-RE mapping is used as the dividing line. The DU is configured to implement one or more functions preceding de-mapping (i.e., decoding, rate matching de-matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and de-RE mapping), while other functions following de-mapping (e.g., digital BF or FFT / CP removal) are implemented in the RU. For functional descriptions of the DU and RU corresponding to various types of eCPRI, please refer to the eCPRI protocol; they will not be elaborated here.

[0066] In one possible design, the processing unit in the BBU used to implement baseband functions is called the baseband high (BBH) unit, and the processing unit in the RRU / AAU / RRH used to implement baseband functions is called the baseband low (BBL) unit.

[0067] 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. 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 modules and hardware modules.

[0068] Access network devices and / or terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. The scenarios in which the access network devices and terminals are located are not limited in the embodiments of this application. Furthermore, terminals and access network devices can be hardware devices, or software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminals and access network devices.

[0069] In the embodiments of this application, the device (terminal-side device) used to implement the functions of the terminal can be the terminal, or a component in the terminal (such as a module, communication module, circuit or chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core), or a logical node, logical module or software that can implement all or part of the functions of the access network device.

[0070] The apparatus used to implement the functions of the access network device (network-side apparatus) can be the access network device, or a component in the access network device (such as a module, communication module, circuit or chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core), or a logical node, logical module or software that can implement all or part of the functions of the access network device.

[0071] For ease of description, the following description of the technical solutions provided in the embodiments of this application will use the terminal-side device as a terminal and the network-side device as an access network device as examples.

[0072] The following describes the terminology used in the embodiments of this application.

[0073] I. Scattering body

[0074] A scatterer is an object or medium in space that can affect wireless signals, thereby altering the characteristics of those signals. This effect includes, but is not limited to, reflection, scattering, diffraction, transmission, or refraction. Alternatively, a scatterer may also be referred to as an obstacle, obstruction, reflector, diffractor, or refractor.

[0075] II. Path, Line of Sight (LoS) Path, and Non-Line of Sight (NLoS) Path

[0076] Path: Also known as a route, path, propagation path, or transmission path, in wireless communication, the channel between the transmitter and receiver can consist of at least one path. When a channel consists of multiple paths, these multiple paths are called a multipath, and the channel is called a multipath channel. For example, paths can be classified as Loss-of-Sight (LoS) paths and Non-LoS (NLoS) paths.

[0077] LoS path: The straight-line propagation path of a signal transmitted by the transmitter to the receiver without passing through any scattering objects. Optionally, the LoS path can also be called a direct path or a direct-traffic path.

[0078] NLoS path: The non-linear propagation path of a signal transmitted by the transmitter to the receiver after passing through a scatterer. Optionally, the NLoS path can also be called a non-direct path, reflection path, scattering path, diffraction path, or refraction path. Optionally, each NLoS path can be formed by at least one scatterer, and the effects of each scatterer can be the same or different. For example, an NLoS path is formed by reflection from a single scatterer; or, an NLoS path is formed by reflection from scatterer A to scatterer B, and then reflection from scatterer B; or, an NLoS path is formed by scattering from scatterer A to scatterer B, and then reflection from scatterer B.

[0079] III. Channel Measurement

[0080] Channel measurement refers to the process by which a transmitter sends a reference signal, a receiver receives the reference signal, and determines channel state information (CSI) based on the reference signal. The reference signal is a known signal used for channel measurement; optionally, it can also be called a pilot signal or a probe signal. Channel state information is used to characterize channel features or properties; optionally, it can also be called channel information, channel matrix information, or channel characteristic information.

[0081] For example, for a multipath channel, channel state information includes parameters of the paths that make up the channel. These parameters are used to distinguish or identify the path. For example, path parameters may include, but are not limited to, one or more of the following: path angle, path distance, and path gain. The path angle may be at least one of the following: departure angle, departure angle, arrival angle, elevation angle, or azimuth angle. Optionally, the channel state information including the parameters corresponding to the paths that make up the channel can also be described as: the channel state information is used to indicate or determine the parameters corresponding to the paths that make up the channel.

[0082] IV. Challenges in Channel Measurement

[0083] With the continuous evolution of mobile communication systems, the channel environment is becoming increasingly complex, placing more stringent dual requirements on the channel measurement capabilities of terminals and access network equipment in terms of both accuracy and power consumption.

[0084] Specifically, on the one hand, the introduction of high-frequency communication, the further expansion of antenna array size, and the increasing prevalence of hybrid near-field and far-field propagation characteristics (i.e., the channel is a hybrid field channel, including near-field and far-field channels) have resulted in complex channel characteristics exhibiting high dimensionality, strong time-varying nature, and non-stationarity, posing a significant challenge to the accuracy of channel state information measurement. On the other hand, more application scenarios are demanding low power consumption and long battery life from terminals and / or access network equipment. However, traditional channel measurement methods often rely on frequent transmission and reception of reference signals and complex calculations of channel state information, leading to excessive power consumption in channel measurement.

[0085] Furthermore, improving the accuracy of channel measurements and reducing power consumption are often mutually restrictive. For example, simplifying the channel measurement process to reduce power consumption often results in a loss of accuracy; conversely, pursuing high accuracy in channel measurements can easily lead to increased power consumption. Therefore, how to effectively improve the accuracy of channel measurements while reducing power consumption is an urgent problem to be solved.

[0086] To effectively improve the accuracy of channel measurements while reducing power consumption, embodiments of this application provide several communication methods and devices. The communication methods can be applied to channel measurements in various scenarios, such as uplink channel measurements in mixed-field channels.

[0087] The following describes the communication method provided in the embodiments of this application:

[0088] Figure 3 A flowchart illustrating a communication method is shown. This communication method can be implemented by a terminal and an access network device, and includes steps 301 to 304. Wherein:

[0089] Step 301: The access network device determines the first channel status information.

[0090] The channel state information mentioned in the embodiments of this application is used to characterize the characteristics or properties of the uplink channel between the access network device and the terminal. Specifically, the first channel state information is used to characterize the first channel, which is an uplink channel.

[0091] In one possible implementation, the access network device can determine the first channel state information based on a conventional channel measurement scheme. The conventional channel measurement scheme in this application refers to a scheme that relies solely on a reference signal for channel measurement. For example, a conventional channel measurement scheme first calculates the covariance matrix of the reference signal; after noise separation of the covariance matrix, it determines the angle-distance two-dimensional search spectrum of the path; and searches for the path across the entire angle-distance two-dimensional search spectrum (i.e., a full-spectrum search) to determine the channel state information. The channel state information includes at least parameters such as the angle, distance, and path gain of the searched path.

[0092] In another possible implementation, the access network device can determine the first channel state information according to the following scheme for determining the second channel state information: the access network device jointly determines the first channel state information based on the determined channel state information and the received reference signal. Here, the determined channel state information refers to the channel state information determined prior to the first channel state information. For example, if the first channel state information corresponds to time unit #X and the determined channel state information corresponds to time unit #Y, then time unit #Y precedes time unit #X. For example, the time unit corresponding to the channel state information can be the reception time unit / transmission time unit of the reference signal associated with the channel state information, etc., and the reference signal associated with the channel state information is the reference signal used to determine the channel state information. Optionally, a time unit can consist of at least one frame, at least one half-frame, or at least one time slot, etc., and this application does not limit this.

[0093] Optionally, if the access network device is measuring the uplink channel between the access network device and the terminal for the first time, and the access network device does not have known channel state information, the access network device can determine the first channel state information according to the traditional channel measurement scheme.

[0094] Optionally, if the access network device is not measuring the uplink channel between the access network device and the terminal for the first time, such as the second or third time, then the access network device has determined channel state information. The access network device can determine the first channel state information according to the scheme for determining the second channel state information, or the access network device can determine the first channel state information according to the traditional channel measurement scheme.

[0095] For example, such as Figure 4 As shown, the access network device performs the first channel measurement in time unit #1, including receiving reference signal #1 and processing reference signal #1 based on a traditional channel measurement scheme to obtain channel state information #1; the second channel measurement is performed in time unit #4, including receiving reference signal #2 and processing reference signal #2 based on channel state information #1; the third channel measurement is performed in time unit #8, including receiving reference signal #3 and processing reference signal #3 based on a traditional channel measurement scheme to obtain channel state information #1. Reference signal #1, reference signal #2, reference signal #3, or any other reference signal mentioned below includes at least one uplink reference signal, which includes, but is not limited to: a sounding reference signal (SRS), a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), or a future uplink reference signal.

[0096] Step 302: The access network device sends configuration information to the terminal. The configuration information is used to indicate the transmission period of the reference signal. The transmission period is determined based on the first channel state information. In the first period determined based on the transmission period, the survival probability of the first scatterer is greater than or equal to the first threshold. The first scatterer is the scatterer in the first channel characterized by the first channel state information.

[0097] Accordingly, the terminal receives the configuration information.

[0098] In this embodiment, the transmission period is determined based on the first channel state information obtained in step 301, meaning the access network device can determine the transmission period based on the first channel state information. After determining the transmission period, the access network device can send configuration information to the terminal to instruct the terminal to transmit a reference signal according to the configuration information. Exemplarily, the configuration information can be carried in radio resource control (RRC) signaling, media access control address (MAC) layer signaling, or physical layer signaling (such as downlink control information (DCI)). Optionally, the configuration information may also be used to indicate the time-frequency domain resources or type of the reference signal, etc., without limitation.

[0099] In one possible implementation, first channel state information is used to indicate the distance, angle, and velocity of the first scatterer relative to the access network device. The transmission period can be determined based on the distance, angle, and velocity of the first scatterer relative to the access network device indicated by the first channel state information, such that the survival probability of the first scatterer is greater than or equal to a first threshold within the first period determined based on the transmission period. Specifically:

[0100] The first scatterer is a scatterer in the first channel. For example, if there is only one scatterer in the first channel, then the first scatterer is that single scatterer. Alternatively, if there are multiple scatterers in the first channel, the first scatterer can be any one of these multiple scatterers, or the scatterer that has the greatest impact on the channel characteristics in the first channel, or a virtual scatterer determined based on these multiple scatterers. The degree of influence of the scatterer on the channel characteristics can be related to the distance of the scatterer relative to the access network equipment or the geometry (e.g., volume) of the scatterer. For example, the closer the scatterer is to the access network equipment, and / or the larger the volume of the scatterer, the more likely the scatterer is to generate more action paths (paths generated by the scatterer reflecting, scattering, diffracting, transmitting, or refraction of the signal), and correspondingly, the greater the influence of the scatterer on the channel characteristics. Conversely, the smaller the scatterer, the smaller its influence on the channel characteristics. The virtual scatterer is used to equivalently represent the influence of these multiple scatterers on the characteristics of the first channel.

[0101] The survival probability of the first scatterer refers to the probability that the first scatterer (or the path of action of the first scatterer) still exists in the uplink channel after the first channel state information is determined.

[0102] The first threshold is preset. For example, this preset threshold may be predefined by the protocol or preconfigured by other devices (such as another access network device) to the access network device.

[0103] The following describes a specific implementation of determining the transmission period based on the distance, angle, and velocity of the first scatterer relative to the access network device, as indicated by the first channel state information:

[0104] Sending period Based on the survival probability of the first scatterer in the first cycle Greater than or equal to the first threshold Sure.

[0105] in, This is related to parameters, which include at least those relating to the distance, angle, and velocity of the first scatterer relative to the access network equipment. Specifically, this parameter includes the transmission period. The speed of the first scatterer relative to the access network equipment The distance of the first scatterer relative to the access network equipment Scattering body inactivation parameters The proportion of moving scatterers in the first channel Spatial correlation scale parameters Weight parameters The radial component of the velocity of the first scatterer relative to the access network equipment The lateral component of the velocity of the first scatterer relative to the access network equipment Normalized parameters of the distance between the first scatterer and the access network equipment Normalized parameters of the angle of the first scatterer relative to the access network equipment .in, It is a known constant. These are known constants related to the measurement scenario. For example, the measurement scenario can be urban, suburban, or indoor, etc., but is not limited to these.

[0106] Optional, and Relevant. For example, The larger, the better The larger, the more the following is expressed as .

[0107] Optional, and Relevant. For example, The larger, the better The smaller the absolute value, the more the following is expressed: For example, It is a negative number.

[0108] For example, and The relationship between them and The relationships between them can be represented in the form of tables or formulas, which can be preset. These presets can be pre-defined by the protocol or pre-configured to the access network device by other devices (such as another access network device).

[0109] For example, The relevant parameters satisfy Formula 1:

[0110] (Formula 1)

[0111] In Formula 1, and The remaining parameters are unknown, but determined based on the distance, angle, and velocity of the first scatterer relative to the access network equipment; that is, the remaining parameters are known. Given that the remaining parameters are known, Formula 1 can be understood as having two variables. and ,and and They show a negative correlation. Among them, and The negative correlation can be understood as follows: the longer the transmission period, the lower the survival probability of the first scatterer in the first period (the first future period) determined based on the transmission period; conversely, the higher the survival probability of the first scatterer in the first period (the first future period) determined based on the transmission period. This negative correlation matches the pattern that channel correlation weakens with increasing time interval.

[0112] in, for The minimum value, This relates to parameters, which include at least those relating to the distance and speed of the first scatterer relative to the access network equipment. Specifically, this parameter includes the maximum value of a first threshold. The minimum value of the first threshold Transformation coefficients The speed of the first scatterer relative to the access network equipment and reference speed Related. Among them, Given a constant, it can be used The rate of change can be determined based on the specific requirements.

[0113] Optional, , and Relevant. For example, if The larger the value, the more stable the channel becomes. , The larger the value, the more likely it is to be determined in the end. The larger the value, the less stable the channel becomes; conversely, the smaller the value, the less stable the channel becomes. , The smaller the value, the easier it is to determine the final result. The smaller the value, the more likely the following content will be represented as: , .

[0114] For example, and The relationship between them and The relationships between them can be represented in the form of tables or formulas, which can be preset. These presets can be pre-defined by the protocol or pre-configured to the access network device by other devices (such as another access network device).

[0115] For example, The relevant parameters satisfy Formula 2:

[0116] (Formula 2)

[0117] In Formula 2, all parameters are known, therefore the access network equipment can be determined according to Formula 2. .

[0118] According to Formulas 1 and 2, access network devices can be based on Thus determine The value of .

[0119] Specifically, Formula 2 yields This represents the quality requirement for the effectiveness of channel state information (i.e., scatterer survival rate) (i.e., the quality of channel measurements), and its setting is related to... They exhibit an inverse correlation. This inverse correlation reflects the trade-off between power consumption (and overhead) and quality in channel measurements.

[0120] For example, when When the threshold is smaller, the channel is relatively more stable, even if a higher threshold is set according to Formula 2. (i.e., maintaining high standards of measurement quality requirements), calculated according to Formula 1. It can still remain at a relatively high value. Therefore, the system prioritizes high thresholds. While ensuring high-quality channel measurements, the frequency of channel measurements is reduced, thereby reducing the power consumption of channel measurements and saving communication resources.

[0121] when When the threshold is large, the survival probability of the scatterer decreases rapidly over time. If the high threshold is maintained... It is necessary to make The extremely short threshold forces the system to perform high-frequency channel measurements, resulting in a significant increase in overhead. Therefore, the threshold is reduced according to Equation 2. The strategy (i.e., appropriately relaxing the requirements for scatterer survival rate and tolerating a certain degree of degradation in channel measurement quality) can avoid triggering too many 'unnecessary' measurements in order to maintain high-quality channel measurements, thus achieving a significant reduction in communication resource overhead in mobile scenarios.

[0122] In conclusion, when Whether the value is small or large, it can be achieved using Formula 1 and Formula 2 above. The larger capacity reduces the power consumption of channel measurements and saves communication resources.

[0123] Based on the above, the sending period can be determined using the following example:

[0124] Example 1: Access network devices from Select a value from the set of possible values ​​until the selected value is found. Make Greater than or equal to This set of values ​​can be preset, either predefined by the protocol or pre-configured by other devices (such as another access network device) to the access network device. For example, this set of values ​​includes { Optionally, to minimize the power consumption of channel measurements, it is necessary to... The value should be as large as possible; therefore, access network devices can select values ​​from the set in descending order of magnitude. For example, Then the access network equipment can first determine corresponding Is it greater than or equal to? ;like corresponding Greater than or equal to ,but Conversely, it is determined. corresponding Is it greater than or equal to? And so on. Among them, corresponding This refers to Substituting into Formula 1 yields Similarly, corresponding This refers to Substituting into Formula 1 yields And so on.

[0125] Alternatively, for example, parameters related to the transmission period can be directly derived based on Formula 1 and Formula 2, thereby determining the transmission period based on the parameters related to the transmission period.

[0126] Example 2: Access network equipment determines the transmission period based on Formula 1 and Formula 2. The relevant parameters include: , , , , , , , , , , , and . The relevant parameters satisfy Formula 3:

[0127] (Formula 3)

[0128] In Formula 3, for The maximum value that can be taken. For example, Values This maximizes the transmission cycle, reducing power consumption and signaling overhead associated with transmitting and processing the reference signal. Alternatively, Value less than Any non-negative value of .

[0129] Optionally, the access network device can determine based on auxiliary information. The value of . This ensures The value of this parameter can reduce the power consumption of access network equipment or terminals during channel measurement. For example, the auxiliary information is used to indicate the value of the minimum transmission period for which the scheme implementing the embodiments of this application can reduce channel measurement power consumption. , This can be obtained based on simulation data or historical experience data. Access network equipment can be determined from the interval shown in Formula 4. ,Right now It belongs to the interval shown in Formula 4.

[0130] (Formula 4)

[0131] Step 303: The terminal sends a first reference signal to the access network device. The first reference signal is the reference signal sent by the terminal in the first cycle.

[0132] Accordingly, the access network equipment receives the first reference signal.

[0133] In this embodiment, the terminal sends a first reference signal to the access network device. The first reference signal is the reference signal sent by the terminal in the first period, which means that the terminal sends the first reference signal to the access network device in the first period according to the configuration information.

[0134] Step 304: The access network device determines the second channel state information based on the first channel state information and the first reference signal.

[0135] In this embodiment, when the access network device receives the first reference signal, the survival probability of the first scatterer is greater than or equal to a first threshold. That is, most scatterers in the first channel are still alive in the current channel, meaning the similarity between the first channel and the current channel (hereinafter referred to as the second channel) is high enough. Therefore, the access network device can determine the second channel state information based on the first channel state information and the first reference signal. The access network device's use of the first channel state information when determining the second channel state information can also be understood as referencing / multiplexing the first channel state information for channel tracking. Thus, compared to the complete and complex channel measurement required solely relying on the first reference signal, this scheme effectively reduces the computational complexity of the access network device, thereby reducing the power consumption of channel measurement.

[0136] Generally, among the paths that make up a channel, the Loss-of-Sight (LoS) path has a greater impact on channel characteristics than the Non-LoS (NLoS) path. Therefore, when determining channel state information, it is more important to prioritize the accuracy of the LoS path determination. Consequently, access network equipment needs to redetermine the angle, distance, and path gain of the LoS path when determining channel state information. Meanwhile, if most scatterers in the first channel still survive in the second channel, the large-scale fading parameters of the NLoS path can be considered to remain essentially constant. This results in the angle and distance of the NLoS path remaining essentially unchanged, while the path gain of the NLoS path changes. Therefore, access network equipment can reuse the angle and distance of the NLoS path, which helps reduce the power consumption of channel measurements.

[0137] Based on the above, in one possible implementation, the first channel consists of a first LoS path and a first NLoS path; the first channel state information includes the angle, distance, and path gain of the first LoS path, as well as the angle, distance, and path gain of the first NLoS path; the access network device determines the second channel state information based on the first channel state information and a first reference signal, specifically including: the access network device determines the angle, distance, and path gain of the second LoS path based on the first channel state information and the first reference signal, and updates the path gain of the first NLoS path; the second channel state information includes the angle, distance, and path gain of the second LoS path, the angle and distance of the first NLoS path, and the updated path gain of the first NLoS path. Wherein, the second LoS path is the LoS path in the second channel.

[0138] In one possible implementation, the access network device determines the angle, distance, and path gain of the second LoS path based on the first channel state information and the first reference signal, including the following steps (a) to (c):

[0139] Step (a): The access network device determines the parameter distribution information of the distance and angle of the terminal relative to the access network device in the first period based on the first channel state information.

[0140] For example, the parameter distribution information includes, but is not limited to, the mean and / or variance. The access network device can, based on the first channel state information and using the Delta method, estimate that the parameter distribution of the terminal's distance and angle relative to the access network device in the first period is approximately Gaussian, thereby obtaining the parameter distribution information of the terminal's distance and angle relative to the access network device in the first period. For example, the approximate Gaussian distribution of the terminal's distance relative to the access network device in the first period is expressed as: The angle of the terminal relative to the access network device in the first cycle is approximately Gaussian distributed as follows: ,in, Represents the predicted time unit The distance between the terminal and the access network equipment. express The mean, Represents the predicted time unit The angle of the terminal relative to the access network equipment. express The mean, This represents the prediction variance.

[0141] Optionally, before step 302, the terminal reports its real-time distance and speed relative to the access network device to the access network device. In this way, the access network device can estimate the parameter distribution information of the terminal's distance and angle relative to the access network device within the first period based on the first channel state information and the terminal's real-time distance and speed relative to the access network device.

[0142] Step (b): The access network device determines the search window for the second LoS path based on the parameter distribution information of the distance and angle of the terminal relative to the access network device in the first cycle, as well as the operating parameter information of the access network device.

[0143] The operating parameters of the access network device refer to the physical parameters recorded in the database during the deployment of the access network device. For example, in this step, the operating parameters of the access network device are used to indicate the number of antennas, antenna spacing, and carrier wavelength, but are not limited to these. The search window of the second LosS path refers to the search range of the second LosS path on the two-dimensional search spectrum of the path's angle-distance. As can be seen from steps (a) and (b), the search window of the second LosS path is determined based on the first channel state information. Since the paths in the first and second channels have a certain correlation, the search window of the second LosS path is smaller than the full-spectrum search window. This reduces the search complexity of the access network device in step (c), thereby reducing the power consumption of channel measurement.

[0144] For example, the search window for the second Loss path , From the perspective of the path, The distance of the path. The minimum angle of the path. The maximum angle of the path. Let be the set of possible distance values ​​for the path. It can be obtained based on the following formula 5 or formula 6. For example, if ,but It can be obtained based on the following formula 5; if ,but It can be obtained based on the following formula 6. It can be obtained based on the following formula 5 or formula 6. For example, if and ,but It can be obtained based on the following formula 5; if and ,but It can be obtained based on the following formula 6. It can be obtained based on the following formula 7.

[0145] (Formula 5)

[0146] , (Formula 6)

[0147] (Formula 7)

[0148] In formulas 5 to 7, and These are the minimum and maximum estimated angles of the terminal relative to the access network equipment during the first cycle, respectively. and The parameter distribution information from the above angles can be used to determine (i.e., based on the first channel state). and These are the minimum and maximum estimated distances of the terminal relative to the access network equipment during the first cycle, respectively. and It can be determined based on the parameter distribution information of the above distance (i.e., based on the first channel state). This refers to the number of antennas for the access network equipment. This is the oversampling coefficient. This refers to the antenna spacing of the access network equipment. The carrier wavelength. This is the floor function.

[0149] Step (c): The access network device determines the angle, distance and path gain of the second LoS path based on the search window of the second LoS path and the first reference signal.

[0150] For example, the access network device performs a two-dimensional fractional Fourier spectral sparse peak search based on the search window of the second LosS path and the first reference signal to determine the angle, distance and path gain of the second LosS path.

[0151] In one possible implementation, the access network device updates the path gain of the first NLoS path based on the first channel state information and the first reference signal, including: the access network device using the least squares method to estimate and update the path gain of the first NLoS path based on the first channel state information and the first reference signal.

[0152] Based on the above, optionally, the access network device can further refine the parameters (including but not limited to at least one of angle, distance and path gain) of the LoS path and / or NLoS path in the second channel state information to reduce the off-network effect of low-LoS path estimation and further improve the estimation accuracy of NLoS path.

[0153] For example, the access network device first performs local refinement on the selected path, updating the path parameters based on Newton's method with the goal of minimizing residual energy. Then, after the local refinement of the selected path is completed, global refinement is performed on the remaining paths.

[0154] Based on the above, optionally, a new scatterer (referred to as the second scatterer) may exist in the second channel compared to the first channel. This second scatterer generates a new NLoS path (referred to as the third path). Therefore, the access network device can further determine the angle, distance, and path gain of the third path in the following manner to improve the second channel state information. That is, the second channel state information includes not only the above-mentioned content but also the angle, distance, and path gain of the third path. Specifically, determining the angle, distance, and path gain of the third path includes the following steps (d) and (e):

[0155] Step (d): The access network device determines the search window for the third path based on the access network device's operating parameters.

[0156] The operating parameters of the access network equipment refer to the physical parameters recorded in the database during the deployment of the access network equipment. For example, in this step, the operating parameters of the access network equipment are used to indicate the number of antennas, antenna spacing, carrier wavelength, sector angle range, sector distance range, etc., but are not limited to these. The search window of the third path refers to the search range of the third path on the two-dimensional search spectrum of the path's angle and distance. The search window of the third path conforms to the continuity of terminal movement and the sparse peak movement law on the fractional Fourier spectrum, and is determined based on the operating parameters of the access network equipment. The search window of the third path is smaller than the full-spectrum search window. This reduces the search complexity of the access network equipment in step (e), thereby reducing the power consumption of channel measurement.

[0157] For example, the search window for the second Loss path , From the perspective of the path, The distance of the path. The minimum angle of the path. The maximum angle of the path. Let be the set of possible distance values ​​for the path. It can be obtained based on the following formula 8 or formula 9. For example, if ,but It can be obtained based on the following formula 8; if ,but It can be obtained based on the following formula 9. It can be obtained based on the following formula 8 or formula 9. For example, if and ,but It can be obtained based on the following formula 8; if and ,but It can be obtained based on the following formula 9. It can be obtained based on the following formula 10.

[0158] (Formula 8)

[0159] , (Formula 9)

[0160] (Formula 10)

[0161] In formulas 8 to 10, and These are the minimum and maximum estimated angles of the terminal relative to the access network equipment during the first cycle, respectively. and It can be determined based on the terminal's continuous mobility and the movement pattern of sparse peaks on the fractional Fourier spectrum, according to the operating parameters of the access network equipment. and These are the minimum and maximum estimated distances of the terminal relative to the access network equipment during the first cycle, respectively. and It can be determined based on the terminal's continuous mobility and the movement pattern of sparse peaks on the fractional Fourier spectrum, according to the operating parameters of the access network equipment. This refers to the number of antennas for the access network equipment. This is the oversampling coefficient. This refers to the antenna spacing of the access network equipment. The carrier wavelength. This is the floor function.

[0162] Step (e): The access network device determines the angle, distance, and path gain of the third path based on the search window of the third path, the angle, distance, and path gain of the second LoS path, the angle and distance of the first NLoS path, the path gain of the updated first NLoS path, and the first reference signal.

[0163] For example, the access network device performs a two-dimensional fractional Fourier spectrum sparse peak search based on the search window of the third path, the angle, distance and path gain of the second LoS path, the angle and distance of the first NLoS path, the path gain of the updated first NLoS path, and the first reference signal, until the residual energy is less than a preset threshold, thereby determining the angle, distance and path gain of the third path.

[0164] Based on the above, optionally, after determining the second channel state information (i.e., the scheme of this embodiment), the access network device can continue to perform channel measurements by referring to the scheme of this embodiment to determine new channel state information, and so on, until a stop condition is triggered. For example, the stop condition can be that the access network device performs L channel measurements based on the scheme of this embodiment, where L is a preset integer. Optionally, after the stop condition is triggered, the access network device can perform a first channel measurement based on a determined traditional channel measurement method, and then continue to perform channel measurements by referring to the scheme of this embodiment until the stop condition is triggered again.

[0165] Based on this optional approach, it is beneficial for access network devices to reduce errors in a timely manner by using traditional channel measurement schemes when the accumulated error of channel measurement using the scheme of this embodiment is large, thereby ensuring the accuracy of channel measurement.

[0166] Optionally, after step 304, the access network device may perform data transmission based on the second channel state information to improve the quality of data transmission.

[0167] For example, the access network device can determine the uplink transmission configuration information of the terminal based on the second channel state information, so that the terminal can perform uplink data transmission according to the uplink transmission configuration information, thereby improving the quality of uplink data transmission. And / or, in a time division duplex (TDD) system, since the uplink and downlink channels are reciprocal, the second channel state information can also characterize the downlink channel (features or characteristics) of the terminal and the access network device. In this way, the access network device can also perform downlink data transmission based on the second channel state information, thereby improving the quality of downlink data transmission.

[0168] based on Figure 3 In the described embodiment, on one hand, the access network device determines the measurement result (i.e., second channel state information) of the second channel by fusing the prior measurement results (i.e., first channel state information) of the first channel (or historical channel) with the real-time observation information (i.e., first reference signal) of the second channel (or current channel). Compared to the complete and complex channel measurement required solely relying on the first reference signal, this method effectively reduces computational complexity, thereby reducing the power consumption of channel measurement. On the other hand, the access network device flexibly determines the transmission period of the reference signal based on the prior measurement results of the first channel, ensuring that most scatterers in the first channel remain viable in the second channel within the first period, resulting in a high similarity between the first and second channels. This method is beneficial for effectively improving the accuracy of channel measurement while reducing the power consumption of channel measurement.

[0169] In the above embodiments, greater than or equal to, not less than, greater than, higher than or equal to, or higher than can be substituted for each other; less than, not higher than, less than or equal to, lower than or equal to, or lower than can be substituted for each other; this application does not limit this.

[0170] The following describes the apparatus involved in the embodiments of this application.

[0171] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission via the air interface from other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY via the air interface from other units or modules. "Send" can also be understood as the "output" of a chip interface, and "receive" can also be understood as the "input" of a chip interface. In other words, sending and receiving can occur between devices, for example, between devices themselves, or within a device, for example, between components, modules, chips, software modules, or hardware modules within a device via a bus, trace, or interface.

[0172] This application divides the communication device into functional modules according to the above-described method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this application is illustrative and represents only one logical functional division; other division methods may be used in actual implementation. The following will combine... Figures 5 to 7 The communication device of the present application embodiment is described in detail.

[0173] Figure 5 This is a schematic diagram of a communication device provided in an embodiment of this application. Figure 5 As shown, the communication device includes a processing module 501 and a transceiver module 502. The transceiver module 502 implements the communication function, and the processing module 501 implements the processing function.

[0174] In some embodiments of this application, the communication device is a network-side device in the above method embodiments, which may be an access network device or a chip or functional module configured in the access network device; or the communication device is a terminal-side device in the above method embodiments, which may be a terminal or a chip or functional module disposed in the terminal.

[0175] In one embodiment, the transceiver module 502 is used to perform transceiver-related operations of the access network device in the above method embodiment, and the processing module 501 is used to perform processing-related operations of the access network device in the above method embodiment. Specifically:

[0176] The transceiver module 502 is used to send configuration information, which indicates the transmission period of the reference signal. The transmission period is determined based on the first channel state information. In the first period determined based on the transmission period, the survival probability of the first scatterer is greater than or equal to a first threshold. The first scatterer is the scatterer in the first channel characterized by the first channel state information. The transceiver module 502 is used to receive the first reference signal, which is the reference signal sent by the terminal in the first period.

[0177] The processing module 501 is used to determine the first channel state information, determine the transmission period based on the first channel state information, and determine the second channel state information based on the first channel state information and the first reference signal.

[0178] In another embodiment, the transceiver module 502 is used to perform transceiver-related operations of the terminal in the above method embodiment, and the processing module 501 is used to perform processing-related operations of the terminal in the above method embodiment. Specifically:

[0179] The transceiver module 502 is used to receive configuration information, which indicates the transmission period of a reference signal. The transmission period is determined based on first channel state information. In the first period determined based on the transmission period, the survival probability of a first scatterer is greater than or equal to a first threshold. The first scatterer is the scatterer in the first channel characterized by the first channel state information. The transceiver module 502 is used to transmit a first reference signal, which is the reference signal transmitted by the terminal in the first period. The first reference signal and the first channel state information are used to determine second channel state information.

[0180] The processing module 501 is used to process the configuration information in order to send the first reference signal.

[0181] For details regarding the functions of the communication device, or more specifically, the functions of the processing module 501 and the transceiver module 502, please refer to the method embodiments described above; they will not be detailed here.

[0182] For example, the transceiver module 502 described above can be an antenna module. Alternatively, the transceiver module 502 can be an input / output module. Optionally, in the above embodiments, the device may further include a storage module, which can be used to store instructions (such as computer programs or computer instructions) and / or data. The processing module 501 can read the instructions and / or data from the storage module to enable the device to implement the aforementioned method embodiments.

[0183] For details regarding the specific explanations of each term, noun, or step in the above embodiments, please refer to the descriptions in the above method embodiments; they will not be detailed here.

[0184] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0185] It is understandable that the module division in the aforementioned communication device is merely a logical functional division. Each function can correspond to a functional module, or two or more functions can be integrated into one functional module. In actual implementation, all or some modules can be integrated into a single physical entity, or they can be distributed across different physical entities. Furthermore, the aforementioned functional modules can be implemented in hardware, software, or a combination of both.

[0186] In this embodiment, the processing module and the transceiver module can be coupled, etc., and the connection method between the processing module and the transceiver module is not limited in this embodiment. During the execution of the above method, the process of sending information can be a process where the processing module outputs the information. When outputting the information, the processing module outputs the information to the transceiver module for transmission. After the information is output by the processing module, it may need to undergo further processing before reaching the transceiver module. Similarly, the process of receiving information in the above method can be a process where the processing module receives the input information. When the processing module receives the input information, the transceiver module receives the information and inputs it to the processing module. Furthermore, after the transceiver module receives the information, it may need to undergo further processing before being input to the processing module.

[0187] In one possible implementation, Figure 5 In the device shown, the processing module 501 may be one or more processors, the transceiver module 502 may be a transceiver, or the transceiver module 502 may also be a transmitting module and a receiving module. The transmitting module may be a transmitter, and the receiving module may be a receiver. The transmitting module and the receiving module are integrated into a single device, such as a transceiver.

[0188] In another possible implementation Figure 5In the communication device shown, the processing module 501 can be one or more logic circuits, and the transceiver module 502 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 502 can also be a transmitting module and a receiving module. The transmitting module can be an output interface, and the receiving module can be an input interface. The transmitting module and the receiving module are integrated into one module, such as an input / output interface.

[0189] In one example, the functional unit in any of the above communication devices may be one or more integrated circuits configured to implement the above methods, such as: one or more application-specific integrated circuits (ASICs), or one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0190] The communication device described above represents an embodiment of this application. The following describes possible product forms of the communication device. Any device possessing the above-described... Figure 5 Any form of the communication device shown falls within the protection scope of the embodiments of this application. The following description is merely illustrative and does not limit the product form of the communication device in the embodiments of this application to this.

[0191] Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application. Figure 6 As shown, the communication device includes one or more processors 620 and transceivers 610.

[0192] In some embodiments of this application, the above-described communication device can be used to implement the steps, methods, or functions executed by the network-side device, such as the processor 620 being used to execute... Figure 5 The transceiver 610 can be used to perform the functions or steps implemented by the processing module 501 shown. Figure 5 The transceiver module 502 shown illustrates the functions or steps implemented by this module. For detailed information on the processor 620 and transceiver 610, please refer to [link / reference needed]. Figure 3 Alternatively, the method embodiments shown above will not be described in detail here.

[0193] In other embodiments of this application, the above-described communication device is used to implement the steps, methods, or functions executed by the terminal-side device, such as the processor 620 being used to execute... Figure 5 The transceiver 610 can be used to perform the functions or steps implemented by the processing module 501 shown. Figure 5 The transceiver module 502 shown illustrates the functions or steps implemented by this module. For detailed information on the processor 620 and transceiver 610, please refer to [link / reference needed]. Figure 3 Alternatively, the method embodiments shown above will not be described in detail here.

[0194] exist Figure 6 In various implementations of the communication apparatus shown, the transceiver may include a receiver for performing a receiving function (or operation) and a transmitter for performing a transmitting function (or operation). The transceiver is also used to communicate with other devices / appliances via a transmission medium.

[0195] Optionally, the communication device may further include one or more memories 630 for storing program instructions and / or data. The memory 630 is coupled to the processor 620. The coupling in this embodiment is an indirect coupling or communication connection between communication devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between the communication devices, units, or modules. The processor 620 may operate in conjunction with the memory 630. The processor 620 can execute program instructions stored in the memory 630. Optionally, at least one of the above-mentioned memories may be included in the processor.

[0196] This application embodiment does not limit the specific connection medium between the transceiver 610, processor 620, and memory 630. This application embodiment... Figure 6 The memory 630, processor 620, and transceiver 610 are connected via a bus 640, and the bus is in... Figure 6 The connections between other components are shown in thick lines only and are not intended to be limiting. This bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0197] In the embodiments of this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or being executed by a combination of hardware and software modules within the processor.

[0198] In this application embodiment, the memory may include, but is not limited to, non-volatile memory such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM), or compact disc read-only memory (CD-ROM), etc. Memory is any storage medium capable of carrying or storing instructions or data, and capable of being read and / or written by a computer (such as the communication device shown in this application), but is not limited to these. The memory in this application embodiment may also be a circuit or any other device capable of implementing storage functions, used to store program instructions and / or data.

[0199] The processor 620 is primarily used to process communication protocols (or standards) and communication data, control the entire communication device, execute software programs, and process the data from those programs. The memory 630 is primarily used to store software programs and data. The transceiver 610 may include control circuitry and an antenna. The control circuitry is primarily used for converting baseband signals to radio frequency signals and processing radio frequency signals. The antenna is primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves.

[0200] When the communication device is powered on, the processor 620 can read the software program in the memory 630, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 620 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then performs RF processing on the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and inputs the baseband signal to the processor 620. The processor 620 converts the baseband signal into data and processes the data.

[0201] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor that performs baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0202] The communication device shown in the embodiments of this application may also have a higher... Figure 6 This application does not limit the use of other components or other related elements. The methods performed by the processor and transceiver shown above are merely examples; the specific steps performed by the processor and transceiver can be found in the methods described above.

[0203] Figure 7 This is a schematic diagram of a chip structure provided in an embodiment of this application. Figure 7 As shown, Figure 7 The chip shown includes logic circuitry 701 and interface 702. That is, the processing module 501 can be implemented using logic circuitry 701, and the transceiver module 502 can be implemented using interface 702. The logic circuitry 701 can be a chip, processing circuit, integrated circuit, or SoC chip, etc., and the interface 702 can be a communication interface, input / output interface, pins, etc. For example, Figure 7 The above device is used as an example of a chip, which includes a logic circuit 701 and an interface 702.

[0204] In this embodiment, the logic circuit and the interface can also be coupled to each other. The specific connection method between the logic circuit and the interface is not limited in this embodiment. For example, the logic circuit 701 can be used to perform... Figure 5 The processing module 501 shown implements the functions or steps, and the interface 702 can be used to execute such functions or steps. Figure 5 The transceiver module 502 shown herein implements the functions or steps. For detailed descriptions of the logic circuit 701 and interface 702, please refer to... Figure 3 Alternatively, the method embodiments shown above will not be described in detail here.

[0205] The communication device shown in the embodiments of this application can implement the method provided in the embodiments of this application in hardware form, or it can implement the method provided in the embodiments of this application in software form, etc., and the embodiments of this application do not limit it in this way.

[0206] Furthermore, embodiments of this application also provide a communication system, which includes a terminal-side device and a network-side device, which can be used to execute the methods in any of the foregoing embodiments.

[0207] This application also provides a computer program for implementing the operations and / or processes performed by various communication devices in the methods provided in this application.

[0208] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by various communication devices in the methods provided in this application.

[0209] This application also provides a computer program product comprising computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by various entities in the method provided in this application to be executed.

[0210] In the embodiments provided in this application, it should be understood that the disclosed systems, communication devices, and methods can be implemented in other ways. For example, the communication device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, communication devices, or modules, or it may be an electrical, mechanical, or other form of connection.

[0211] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of this application.

[0212] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0213] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, The method includes: Determine the first channel state information; Send configuration information, which is used to indicate the transmission period of the reference signal. The transmission period is determined based on the first channel state information. In the first period determined based on the transmission period, the survival probability of the first scatterer is greater than or equal to a first threshold. The first scatterer is the scatterer in the first channel characterized by the first channel state information. The survival probability of the first scatterer is the probability that the first scatterer or the action path of the first scatterer still exists in the uplink channel after the first channel state information is determined. The action path of the first scatterer is the path generated by the first scatterer acting on the signal. Receive a first reference signal, wherein the first reference signal is a reference signal sent by the terminal during the first period; Based on the first channel state information and the first reference signal, the second channel state information is determined.

2. The method according to claim 1, characterized in that, The first channel state information is used to indicate the distance, angle, and speed of the first scatterer relative to the access network device.

3. The method according to claim 2, characterized in that, The survival probability of the first scatterer is related to the following parameters: the transmission period, the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, and the normalized parameter of the angle of the first scatterer relative to the access network device. The proportion of moving scatterers in the first channel is related to the speed of the first scatterer relative to the access network device; the weighting parameter is related to the distance of the first scatterer relative to the access network device.

4. The method according to claim 2, characterized in that, The first threshold is related to the following parameters: the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, the speed of the first scatterer relative to the access network device, and the reference speed; The maximum value and the minimum value of the first threshold are both related to the distance of the first scatterer relative to the access network device.

5. The method according to any one of claims 2-4, characterized in that, The transmission period is related to the following parameters: The parameters are: the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, the normalized parameter of the angle of the first scatterer relative to the access network device, the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, and the reference velocity. The proportion of moving scatterers in the first channel is related to the speed of the first scatterer relative to the access network device; the weighting parameter, the maximum value of the first threshold, and the minimum value of the first threshold are all related to the distance of the first scatterer relative to the access network device.

6. The method according to any one of claims 1-4, characterized in that, The first channel consists of a first line-of-sight (LoS) path and a first non-line-of-sight (NLoS) path. The first channel state information includes the angle, distance, and path gain of the first line-of-sight (LoS) path, as well as the angle, distance, and path gain of the first non-line-of-sight (NLoS) path. Determining the second channel state information based on the first channel state information and the first reference signal includes: Based on the first channel state information and the first reference signal, the angle, distance and path gain of the second line-of-sight (LoS) path are determined, and the path gain of the first non-line-of-sight (NLoS) path is updated. The second channel state information includes the angle, distance, and path gain of the second line-of-sight (LoS) path, the angle and distance of the first non-line-of-sight (NLoS) path, and the updated path gain of the first non-line-of-sight (NLoS) path.

7. The method according to claim 6, characterized in that, The step of determining the angle, distance, and path gain of the second line-of-sight (LoS) path based on the first channel state information and the first reference signal includes: Based on the first channel state information, determine the parameter distribution information of the distance and angle of the terminal relative to the access network device in the first period; Based on the parameter distribution information of the distance and angle of the terminal relative to the access network device in the first period, and the operating parameter information of the access network device, the search window for the second line-of-sight (LoS) path is determined. Based on the search window of the second line-of-sight (LoS) path and the first reference signal, the angle, distance, and path gain of the second line-of-sight (LoS) path are determined.

8. The method according to claim 6, characterized in that, The second channel state information also includes the angle, distance and path gain of the third path, wherein the third path is the non-line-of-sight (NLoS) path generated by the second scatterer, and the second scatterer is a new scatterer in the second channel represented by the second channel state information, other than the first scatterer. The method further includes: The search window for the third path is determined based on the operating parameters of the access network equipment; Based on the search window of the third path, the angle, distance, and path gain of the second line-of-sight (LoS) path, the angle and distance of the first non-line-of-sight (NLoS) path, the updated path gain of the first non-line-of-sight (NLoS) path, and the first reference signal, the angle, distance, and path gain of the third path are determined.

9. A communication method, characterized in that, The method includes: Receive configuration information, the configuration information being used to indicate the transmission period of a reference signal, the transmission period being determined based on first channel state information, the survival probability of a first scatterer being greater than or equal to a first threshold within the first period determined based on the transmission period, the first scatterer being a scatterer in the first channel characterized by the first channel state information, the survival probability of the first scatterer being the probability that the first scatterer or the action path of the first scatterer still exists in the uplink channel after the first channel state information is determined, the action path of the first scatterer being the path generated by the first scatterer acting on the signal; A first reference signal is transmitted, which is a reference signal transmitted by the terminal within the first period. The first reference signal and the first channel state information are used to determine the second channel state information.

10. The method according to claim 9, characterized in that, The first channel state information is used to indicate the distance, angle, and speed of the first scatterer relative to the access network device.

11. The method according to claim 10, characterized in that, The survival probability of the first scatterer is related to the following parameters: the transmission period, the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, and the normalized parameter of the angle of the first scatterer relative to the access network device. The proportion of moving scatterers in the first channel is related to the speed of the first scatterer relative to the access network device; the weighting parameter is related to the distance of the first scatterer relative to the access network device.

12. The method according to claim 10, characterized in that, The first threshold is related to the following parameters: the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, the speed of the first scatterer relative to the access network device, and the reference speed; The maximum and minimum values ​​of the first threshold are both related to the distance between the first scatterer and the access network device.

13. The method according to any one of claims 10-12, characterized in that, The transmission period is related to the following parameters: The parameters are: the velocity of the first scatterer relative to the access network device, the distance of the first scatterer relative to the access network device, the scatterer inactivation parameter, the proportion of moving scatterers in the first channel, the spatial correlation scale parameter, the weight parameter, the radial component of the velocity of the first scatterer relative to the access network device, the lateral component of the velocity of the first scatterer relative to the access network device, the normalized parameter of the distance of the first scatterer relative to the access network device, the normalized parameter of the angle of the first scatterer relative to the access network device, the maximum value of the first threshold, the minimum value of the first threshold, the transformation coefficient, and the reference velocity. The proportion of moving scatterers in the first channel is related to the speed of the first scatterer relative to the access network device; the weighting parameter, the maximum value of the first threshold, and the minimum value of the first threshold are all related to the distance of the first scatterer relative to the access network device.

14. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1-8 or 9-13.

15. A communication device, characterized in that, It includes at least one processor, which, when the communication device is in operation, executes a computer program or instructions to cause the communication device to perform the method as claimed in any one of claims 1-8 or 9-13.

16. A chip, characterized in that, It includes logic circuitry and an interface, the logic circuitry and the interface being coupled such that the chip performs the method as claimed in any one of claims 1-8 or 9-13.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program or instructions that, when executed on a computer, cause the method as claimed in any one of claims 1-8 or 9-13 to be performed.

18. A computer program product, characterized in that, It includes a computer program or instructions that, when run on a computer, cause the method as described in any one of claims 1-13 to be performed.

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