Communication method and apparatus

Abstract

A communication method and apparatus, capable of reducing terminal power consumption caused by frequent measurements. In the method, a network may maintain wireless environment information of one or more regions, wherein the wireless environment information of a certain region is related to wireless signal transmission in the region, and the wireless environment information may indicate cell signal quality in the region, such as RSRP and / or RSRQ. In addition, the network may broadcast the wireless environment information of the one or more regions, and a terminal within the coverage range of the network can perform cell selection and / or cell re-selection on the basis of the wireless environment information broadcast by the network. For example, a terminal can determine the cell signal quality of at least one cell at the location of the terminal on the basis of wireless environment information of a certain region, and perform cell selection and / or cell re-selection on the basis of the cell signal quality of the at least one cell. That is, the terminal does not need to periodically perform a large number of frequent measurements, thereby reducing the terminal power consumption caused by frequent measurements.

Description

Communication method and apparatus

[0001] This application claims priority from the Chinese patent application No. 202410835686.X filed on June 24, 2024, and entitled "Communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication, in particular to a communication method and apparatus. BACKGROUND

[0003] In a mobile communication network, when a terminal first enters a network, or enters a network again after being disconnected from the network, or is released from a connection, or re-establishes a connection, the terminal needs to perform cell selection, i.e., to select a cell to camp on that meets the S criterion for signal quality. After the terminal selects a cell to camp on, it can camp on a more suitable cell according to the frequency priority and cell quality, i.e., perform cell reselection.

[0004] Currently, in the process of cell selection and cell reselection, the terminal needs to periodically perform cell measurement to obtain the signal quality of the current cell and neighboring cells, so as to make a decision on cell selection and cell reselection, which results in high power consumption of the terminal. SUMMARY

[0005] The present application provides a communication method and apparatus, which can reduce the power consumption of the terminal caused by frequent measurement.

[0006] In a first aspect, a communication method is provided. The method can be performed by a terminal, or by a component of the terminal, such as a processor, a chip, or a chip system of the terminal, or by a logic module or software that can implement all or part of the functions of the terminal. The method comprises: receiving first radio environment information from a first radio access network (RAN) node, and performing cell selection and / or cell reselection based on the first radio environment information. The first radio environment information is information related to radio signal transmission in a first area, and the first radio environment information indicates cell signal quality in the first area, which includes reference signal received power (RSRP) or includes RSRP and reference signal received quality (RSRQ).

[0007] Based on the scheme, the terminal can receive information related to radio signal transmission in a certain area sent by the network, and the information can indicate the cell signal quality in the area, so that the terminal in the network coverage can perform cell selection and / or cell reselection based on the information sent by the network. That is, in the process of cell selection and / or cell reselection, the terminal does not need to perform a large number of frequent measurements periodically, and thus the power consumption of the terminal caused by frequent measurement can be reduced.

[0008] In one possible design, the cell selection and / or cell reselection is performed based on the first radio environment information, including: determining second radio environment information based on the first radio environment information and location information of the terminal, the second radio environment information indicating cell signal quality of at least one cell at a first location, the first location being a location where the terminal is located; and performing the cell selection and / or cell reselection based on the second radio environment information.

[0009] Based on this possible design, the terminal can determine cell signal quality of at least one cell at a location where the terminal is located based on radio environment information of a certain area, and perform cell selection and / or cell reselection based on the cell signal quality of the at least one cell. That is, the terminal can perform cell selection and / or cell reselection without performing a large number of measurements, and can reduce power consumption of the terminal due to frequent measurements.

[0010] In one possible design, the second radio environment information indicates cell signal quality of at least one first cell at the first location, the at least one first cell being a neighbor of a second cell, the second cell being a cell where the terminal is camped on, and the cell selection and / or cell reselection is performed based on the second radio environment information, including: performing the cell reselection based on the cell signal quality of the at least one first cell at the first location and an offset, the offset being used to negatively offset the cell signal quality of the at least one first cell.

[0011] In one possible design, the method further includes: measuring cell signal quality of at least one third cell, the at least one third cell being a neighbor of the second cell; and performing the cell reselection based on the cell signal quality of the at least one first cell at the first location and the offset, including: performing the cell reselection based on the cell signal quality of the at least one first cell at the first location, the offset, and the cell signal quality of the at least one third cell.

[0012] Based on this possible design, in a cell reselection scenario, the cell signal quality of part of the neighbors can be obtained based on the radio environment information, and the cell signal quality of the remaining part of the neighbors can be obtained through measurements. Compared with a scheme of obtaining the cell signal quality of all the neighbors through measurements, power consumption due to measurements can be reduced. Furthermore, the cell signal quality of the part of the neighbors obtained based on the radio environment information is negatively offset based on the offset, which is equivalent to reducing the priority of the part of the neighbors, so that the terminal can give priority to the priority of the neighbors for which measurements are performed. Since the accuracy of the cell signal quality obtained through measurements is relatively high, giving priority to the neighbors for which measurements are performed in cell reselection can improve the accuracy of cell reselection and improve the robustness of the overall scheme.

[0013] In one possible design, the method further includes: receiving first indication information from the first RAN node, the first indication information indicating the offset.

[0014] In a possible design, the first radio environment information is determined according to perceived environment information of the first area, and the perceived environment information of the first area is information related to a physical environment within the first area.

[0015] Based on the possible design, the information related to radio signal transmission within the area where the terminal is located can be obtained through perception, without periodic or continuous measurement by the terminal, thereby reducing power consumption of the terminal.

[0016] In a possible design, the method further includes: receiving second indication information from the first RAN node, where the second indication information indicates that the first radio environment information is radio environment information corresponding to the first area.

[0017] In a possible design, the cell selection and / or cell reselection according to the first radio environment information includes: in a case where the terminal is located within the first area, performing cell selection and / or cell reselection according to the first radio environment information.

[0018] Based on the above two possible designs, the network sends the second indication information, so that the terminal can learn the area corresponding to the radio environment information, thereby performing cell selection and / or cell reselection according to the radio environment information of the area where the terminal is located, avoiding the terminal performing cell selection and / or cell reselection using radio environment information of other areas, and improving the success rate of cell selection and / or cell reselection.

[0019] In a possible design, the method further includes: receiving third indication information from the first RAN node, where the third indication information indicates a validity time of the first radio environment information.

[0020] In a possible design, the cell selection and / or cell reselection according to the first radio environment information includes: within the validity time of the first radio environment information, performing cell selection and / or cell reselection according to the first radio environment information.

[0021] Based on the above two possible designs, the network sends the third indication information, so that the terminal can learn the validity time of the radio environment information, thereby performing cell selection and / or cell reselection according to the radio environment information within the validity time of the radio environment information, avoiding the terminal performing cell selection and / or cell reselection according to invalid radio environment information after the radio environment information is invalid, and thereby avoiding unnecessary power waste.

[0022] In a possible design, the first radio environment information indicates a cell signal quality in the first area, including: the first radio environment information includes a cell signal quality in the first area; or the first radio environment information includes a beam level signal quality in the first area, and the beam level signal quality is used to determine the cell signal quality in the first area.

[0023] In a possible design, the first radio environment information further includes at least one of: a channel feature value, a channel matrix, large-scale fading information, small-scale fading information, multipath information, or interference information.

[0024] Based on the possible design, in a case where the radio environment information includes the channel feature value, the channel matrix, the large-scale fading information, the small-scale fading information, the multipath information, or the interference information, the terminal can report second radio environment information to the network after accessing the network, so that the network can obtain channel information based on the second radio environment information, and then perform reasonable configuration according to the channel state, thereby improving transmission performance.

[0025] In a second aspect, a communication method is provided. The method can be performed by a RAN node, or by a component of the RAN node, such as a processor, a chip, or a chip system of the RAN node, or by a logic module or software that can implement all or part of the functions of the RAN node. The method includes: obtaining first radio environment information, the first radio environment information being information related to wireless signal transmission in a first area, and the first radio environment information indicating a cell signal quality in the first area, the cell signal quality including a reference signal received power (RSRP) or including an RSRP and a reference signal received quality (RSRQ); and sending the first radio environment information.

[0026] Based on this scheme, the network can maintain and send information related to wireless signal transmission in a certain area, which can indicate a cell signal quality in the area, such as an RSRP and / or an RSRQ, so that a terminal in the coverage of the network can perform cell selection and / or cell reselection based on the information sent by the network. For example, the terminal can determine a cell signal quality of at least one cell at a location where the terminal is located based on the radio environment information of the certain area, and perform cell selection and / or cell reselection based on the cell signal quality of the at least one cell. That is, the terminal can not need to perform a large number of frequent measurements periodically during cell selection and / or cell reselection, thereby reducing terminal power consumption caused by frequent measurements.

[0027] In a possible design, the first radio environment information is determined according to perceived environment information of the first area, and the perceived environment information of the first area is information related to a physical environment in the first area.

[0028] Based on the possible design, the information related to the wireless signal transmission in the area where the terminal is located can be obtained through sensing, without the terminal periodically or continuously measuring, so as to reduce the power consumption of the terminal.

[0029] In a possible design, the first wireless environment information is acquired by: sending first request information to the sensing node, the first request information being used to request the wireless environment information of the first area; and receiving the first wireless environment information from the sensing node.

[0030] Based on the possible design, the RAN node can request the sensing node for the wireless environment information of a certain area, without the RAN node calculating the wireless environment information of the area by itself, so as to reduce the processing complexity of the RAN node. In addition, the sensing node side can have relatively complete sensing environment information and stronger computing capability, so that the wireless environment information is determined at the sensing node side, so as to make the wireless environment information more comprehensive, and the accuracy and precision higher.

[0031] In a possible design, the first request information includes the information of the first area and at least one of the following: a parameter included in the first wireless environment information, a level of the first wireless environment information, and wireless information of at least one radio access network (RAN) node in the first area. The level of the first wireless environment information includes a cell level or a beam level. The wireless information of the RAN node includes at least one of the following: an antenna position, an antenna height, an antenna orientation angle, a transmission power, or a frequency used by the RAN node.

[0032] Based on the possible design, the first request information includes the parameter and the level of the requested first wireless environment information, so that the sensing node can accurately determine the first wireless environment information according to the request of the RAN node, and the accuracy of the first wireless environment information is improved.

[0033] In a possible design, the first wireless environment information is acquired by: sending second request information to the sensing node, the second request information being used to request sensing environment information of the first area; receiving the sensing environment information of the first area from the sensing node, the sensing environment information of the first area being information related to a physical environment in the first area; and determining the first wireless environment information according to the sensing environment information of the first area.

[0034] Based on the possible design, the RAN node can determine the wireless environment information of a certain area according to the sensing environment information of the area. Therefore, the RAN node can flexibly determine the wireless environment information based on actual conditions, for example, flexibly determine the level and the included parameter of the wireless environment information according to the use of the wireless environment information, so as to improve flexibility. In addition, the calculation of the wireless environment information is performed at the RAN node side, so as to reduce the overhead and the processing complexity of the sensing node.

[0035] In a possible design, the second request information includes information of the first area and at least one of the following: accuracy of the sensing environment information, a parameter included in the sensing environment information, or a sending manner of the sensing environment information. The parameter included in the sensing environment information indicates at least one of a type, a material, a location, a size, a shape, a moving speed, a dielectric constant, or a reflection coefficient of a scatterer in the first area; and the sending manner includes event triggering or periodic sending.

[0036] Based on this possible design, the second request information includes a parameter and accuracy of the requested sensing environment information, which enables the sensing node to accurately determine the sensing environment information of the first area according to the request of the RAN node, and improves the accuracy of the sensing environment information.

[0037] In a possible design, the first wireless environment information is determined according to the sensing environment information of the first area, including: the first wireless environment information is determined according to the sensing environment information of the first area and wireless information of at least one RAN node in the first area. The wireless information of the RAN node includes at least one of the following: an antenna position, an antenna height, an antenna orientation angle, a transmission power, or a used frequency of the RAN node.

[0038] In a possible design, the method further includes: sending first indication information, the first indication information indicating an offset, the offset being used to negatively offset the cell signal quality determined according to the first wireless environment information.

[0039] In a possible design, the method further includes: sending second indication information, the second indication information indicating that the first wireless environment information is wireless environment information corresponding to the first area.

[0040] In a possible design, the method further includes: sending third indication information, the third indication information indicating a validity time of the first wireless environment information.

[0041] In a possible design, the first wireless environment information indicates the cell signal quality in the first area, including: the first wireless environment information includes the cell signal quality in the first area; or the first wireless environment information includes beam-level signal quality in the first area, and the beam-level signal quality is used to determine the cell signal quality in the first area.

[0042] In a possible design, the first wireless environment information further includes at least one of the following: a channel eigenvalue, a channel matrix, large-scale fading information, small-scale fading information, multipath information, or interference information.

[0043] The technical effects brought by any possible design of the second aspect can refer to the technical effects brought by the corresponding or similar design of the first aspect, which will not be repeated here.

[0044] In a third aspect, a method for communication is provided. The method can be performed by a sensing node, or by a component of the sensing node, such as a processor of the sensing node, a chip, or a chip system, etc., or by a logic module or software that can implement all or part of the functions of the sensing node. The sensing node can be a sensing function, SF, network element or a sensing unit, SU, for example. The method includes receiving first request information from a first RAN node, the first request information being used to request wireless environment information of a first area; determining first wireless environment information according to the first request information; and sending the first wireless environment information to the first RAN node. The first wireless environment information is information related to wireless signal transmission in the first area, and the first wireless environment information indicates cell signal quality in the first area, which includes reference signal received power, RSRP, or includes RSRP and reference signal received quality, RSRQ. The technical effects brought by the third aspect can refer to the technical effects brought by the second aspect, which will not be repeated here.

[0045] In a fourth aspect, a method for communication is provided. The method can be performed by a sensing node, or by a component of the sensing node, such as a processor of the sensing node, a chip, or a chip system, etc., or by a logic module or software that can implement all or part of the functions of the sensing node. The sensing node can be a sensing function, SF, network element or a sensing unit, SU, for example. The method includes receiving second request information from a first radio access network, RAN, node, the second request information being used to request sensing environment information of a first area, the sensing environment information of the first area being information related to a physical environment in the first area; and sending the sensing environment information of the first area to the first RAN node. The sensing environment information of the first area is used to determine first wireless environment information, and the first wireless environment information is information related to wireless signal transmission in the first area, and the first wireless environment information indicates cell signal quality in the first area, which includes reference signal received power, RSRP, or includes RSRP and reference signal received quality, RSRQ. The technical effects brought by the fourth aspect can refer to the technical effects brought by the second aspect, which will not be repeated here.

[0046] In a fifth aspect, a communication apparatus is provided, which is used to implement various methods. The communication apparatus includes modules, units, or means corresponding to the methods, which can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions.

[0047] In some possible design, the communication apparatus can include a processing module and a transceiving module. The processing module can be used to implement the processing functions in any of the aspects and any possible implementation thereof. The transceiving module can include a receiving module and a sending module, which are used to implement the receiving function and the sending function in any of the aspects and any possible implementation thereof respectively.

[0048] In some possible design, the transceiving module can be composed of a transceiving circuit, a transceiver, a transceiver, or a communication interface.

[0049] In the sixth aspect, a communication apparatus is provided, which includes a processor and a memory. The memory is used to store computer instructions, which, when executed by the processor, cause the communication apparatus to perform the method in any of the aspects and any possible design thereof.

[0050] In the seventh aspect, a communication apparatus is provided, which includes a processor and a communication interface. The communication interface is used to communicate with modules outside the communication apparatus. The processor is used to execute computer programs or instructions, so as to cause the communication apparatus to perform the method in any of the aspects and any possible design thereof.

[0051] In the eighth aspect, a communication apparatus is provided, which includes at least one processor. The processor is used to execute computer programs or instructions stored in a memory, so as to cause the communication apparatus to perform the method in any of the aspects and any possible design thereof. The memory can be coupled with the processor, or can be independent of the processor.

[0052] In the ninth aspect, a communication apparatus (for example, the communication apparatus can be a chip or a chip system) is provided, which includes a processor used to implement the functions in any of the aspects and any possible design thereof.

[0053] In some possible design, the communication apparatus includes a memory used to save necessary program instructions and data.

[0054] In some possible design, when the apparatus is a chip system, the apparatus can be composed of a chip, or can include a chip and other discrete devices.

[0055] The communication apparatus in the fifth aspect to the ninth aspect can be the terminal in the first aspect, or an apparatus included in the terminal, such as a chip or a chip system. Alternatively, the communication apparatus can be the RAN node in the second aspect, or an apparatus included in the RAN node, such as a chip or a chip system. Alternatively, the communication apparatus can be the perception node in the third aspect or the fourth aspect, or an apparatus included in the perception node, such as a chip or a chip system.

[0056] In a tenth aspect, a communication apparatus is provided, which can be a terminal, a module or unit (e.g., chip, or chip system, or circuit) in the terminal performing the method / operation / step / action described in the first aspect, or a module or unit capable of being used with the terminal; or the communication apparatus can be a RAN node, a module or unit (e.g., chip, or chip system, or circuit) in the RAN node performing the method / operation / step / action described in the second aspect, or a module or unit capable of being used with the RAN node; or the communication apparatus can be a sensing node, a module or unit (e.g., chip, or chip system, or circuit) in the sensing node performing the method / operation / step / action described in the third aspect or the fourth aspect, or a module or unit capable of being used with the sensing node.

[0057] It can be understood that when the communication apparatus provided in any one of the fifth aspect to the tenth aspect is a chip, the sending action / function of the communication apparatus can be understood as outputting information, and the receiving action / function of the communication apparatus can be understood as inputting information.

[0058] In an eleventh aspect, a computer readable storage medium is provided, which stores a computer program or instructions, when running on a communication apparatus, causes the communication apparatus to perform the method described in any one of the aspects above and any possible design thereof.

[0059] In a twelfth aspect, a computer program product containing instructions is provided, when running on a communication apparatus, causes the communication apparatus to perform the method described in any one of the aspects above and any possible design thereof.

[0060] In a thirteenth aspect, a communication system is provided, which includes a terminal and a RAN node. The terminal is configured to perform the method described in the first aspect above and any possible design thereof, and the RAN node is configured to perform the method described in the second aspect above and any possible design thereof.

[0061] The technical effects brought by any one of the fifth aspect to the thirteenth aspect can be referred to the technical effects brought by different design manners in the first aspect or the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0062] FIG. 1 is a diagram of six scenarios of a future communication system provided in the present application;

[0063] FIG. 2 is a diagram of a structure of a communication system provided in the present application;

[0064] FIG. 3 is a diagram of a structure of another communication system provided in the present application;

[0065] FIG. 4 is a schematic diagram of a system structure of an O-RAN provided by the present application;

[0066] FIG. 5 is a schematic diagram of a protocol layer architecture of a CU-DU provided by the present application;

[0067] FIG. 6 is a schematic diagram of another protocol layer architecture of a CU-DU provided by the present application;

[0068] FIG. 7 is a schematic diagram of a protocol layer architecture of an access network device in an O-RAN system provided by the present application;

[0069] FIG. 8 is a schematic diagram of a flow of a communication method provided by the present application;

[0070] FIG. 9 is a schematic diagram of a physical environment reconstructed based on perception provided by the present application;

[0071] FIGS. 10-14 are schematic diagrams of flows of communication methods provided by the present application;

[0072] FIGS. 15-17 are schematic diagrams of structures of communication apparatuses provided by the present application. DETAILED DESCRIPTION

[0073] In the description of the present application, unless otherwise specified, “ / ” represents that the objects before and after the “ / ” are in an “or” relationship, for example, A / B can represent A or B; “and / or” in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A alone, A and B exist at the same time, and B alone, where A and B can be singular or plural.

[0074] In the description of the present application, unless otherwise specified, “multiple” means two or more than two. “At least one of the following” or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0075] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the same items or similar items with basically the same functions and effects are distinguished by using “first”, “second”, etc. The skilled in the art can understand that “first”, “second”, etc. do not limit the quantity and execution order, and “first”, “second”, etc. also do not necessarily mean different.

[0076] In the present embodiments, the word "exemplary" or "for example" is used to mean "an example of" rather than "an example that is preferred" or "an example that is the best". Thus, use of any of these terms is not intended to teach that a process, implementation, composition, or tool described in connection with the term is, for example, preferred, preferred, or essential to the practice of the application.

[0077] It can be understood that, throughout the specification, the term "embodiment" mentioned in the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It can be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0078] It can be understood that in the present application, "when" and "if" refer to the corresponding processing under certain objective conditions, not the time limit, and do not require judgment action when implementing, nor mean that there are other limitations.

[0079] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. In some scenarios, it can also be combined with other features according to demand. Correspondingly, the device given in the embodiments of the present application can also realize these features or functions, which will not be described here.

[0080] In the present application, the same or similar parts of each embodiment can be mutually referred to, unless otherwise specified. In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to, unless otherwise specified and logically conflicting. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship. The following description of the embodiments of the present application does not constitute a limitation on the scope of protection of the present application.

[0081] In order to facilitate the understanding of the technical scheme of the embodiments of the present application, first, a brief introduction of the related technology of the present application is given as follows.

[0082] 1. Wireless sensing:

[0083] Wireless sensing is an important technology in the future. In wireless sensing, a transmitting device can radiate electromagnetic waves to the surrounding environment to transmit a specific signal, and a receiving device can accordingly receive the electromagnetic wave signal reflected by the environment. The transmitting device or the receiving device can compare and analyze the correlation between the received signal and the transmitted signal, thereby sensing or analyzing the relevant information of the surrounding environment. For example, whether there is a scatterer in the environment, the distance between the scatterer and the transceiver device, the orientation or angle (horizontal direction and / or vertical direction) of the scatterer relative to the transceiver device, the moving speed of the scatterer relative to the transceiver device, etc.

[0084] Wireless sensing can be applied in various scenarios. For example, in a vehicle-to-everything scenario, a vehicle can obtain surrounding environmental information such as the positions and speed information of mobile objects such as vehicles and pedestrians, and the information of relatively static objects such as road surfaces and fences through wireless sensing. For another example, in an airport or the like, a drone can be sensed by deploying a device to prevent the drone from affecting the takeoff and landing of an airplane in the airport. For another example, in a home environment, intruder detection can be performed through wireless sensing to improve the safety and privacy performance of the home environment.

[0085] 2. Harmonized communication and sensing (HCS):

[0086] HCS, uplink centric broadband communication (UCBC), and real-time broadband communication (RTBC) are three new scenarios for the expansion of future mobile communication, as shown in FIG. 1. They combine the three standard scenarios of enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communications (URLLC), and change the “triangle” of the 5th generation (5G) scenario into a more abundant “hexagon”.

[0087] HCS can also be referred to as integrated sensing and communication (ISAC). ISAC / HCS aims to integrate wireless communication and wireless sensing functions in the same system, and use various propagation characteristics of wireless signals to realize positioning, detection, imaging and identification of targets and other sensing functions to obtain relevant information of the surrounding environment, improve communication performance and enhance user experience. For example, by applying the beam scanning technology of massive multiple-input multiple-output (MIMO) of a cellular network to the field of sensing, both communication and sensing can be provided in the ISAC / HCS scenario.

[0088] For example, a network device (such as a base station) can perform sensing by sending a sensing signal and receiving a backscatter signal, thereby obtaining information such as the position and speed of a sensing target (such as a scatterer) in the environment. The backscatter signal is a signal reflected by the sensing target in the environment. The time delay of the backscatter signal relative to the transmitted sensing signal can reflect the distance of the sensing target, and the Doppler shift of the backscatter signal relative to the transmitted sensing signal can reflect the speed of the sensing target.

[0089] 3. Cell selection and cell reselection:

[0090] Cell selection: when a terminal enters the network for the first time, or enters the network again after being disconnected, or is released from connection, or re-establishes connection, it needs to select a cell with signal quality meeting the S criterion for camping, and the process of selecting the cell can be understood as cell selection. For example, the S criterion includes: S rxlev > 0 AND S qual > 0; S rxlev = Q rxlevmeas -(Q rxlevmin + Q rxlevminoffset )-P compensation -Qoffset temp ; S qual = Q qualmeas -(Q qualmin + Q qualminoffset )-Qoffset temp .

[0091] Wherein, S rxlev is the received signal power of the cell selected by the cell, such as the reference signal received power (RSRP);

[0092] S qualThe cell selects a cell received signal quality, such as a reference signal received quality (RSRQ);

[0093] Q rslevmeas and Q qualmeas are respectively the measured RSRP and RSRQ;

[0094] Q rxlevmin and Q qualmin are respectively the minimum RSRP and RSRQ required for the current cell;

[0095] Q rxlevminoffset and Q qualminoffset are respectively the offset of the RSRP and RSRQ to be considered at the time of evaluation;

[0096] P compensation is the PSPR compensation amount considering the uplink transmission power;

[0097] Qoffset temp is a temporary cell quality evaluation offset.

[0098] Cell reselection: after the terminal selects a cell, it will camp on a more suitable cell according to the frequency priority and cell quality, which can be understood as cell reselection. Exemplarily, the cell reselection principle is as follows:

[0099] If the frequency priority of the target cell is higher than that of the current serving cell, and the S value (such as S rxlev ) of the target cell continuously exceeds the threshold parameter ThreshXHigh (i.e., the inter-frequency frequency point high priority reselection threshold value) within the time ReselectionTimer, regardless of the S value of the current serving cell, the terminal will reselect to the target cell.

[0100] If the frequency priority of the target cell is lower than that of the current serving cell, then when the S value of the serving cell is less than ThrshServLow, the S value of the target cell is greater than the threshold parameter ThreshXHigh (i.e., the inter-frequency low priority reselection threshold value), and the duration exceeds ReselectionTimer, the terminal reselects to the target cell.

[0101] If the target cell and the current serving cell are intra-frequency cells or inter-frequency cells with the same priority, the S value of the target cell is less than or equal to a preset threshold, and continuously satisfies the R criterion within T time, and the terminal camping time in the serving cell exceeds 1 second (s), the terminal reselects to the target cell. Exemplarily, the R criterion includes: R n > R s ; R s = Qmeas,s + Q hyst - Qoffset temp ; R n = Q meas,n + Q offset - Qoffset temp ;

[0102] wherein Q meas,s is the S value of the current serving cell, Q meas,n is the S value of the neighbor cell, Q hyst , Q offset , and Qoffset temp are offsets.

[0103] That is, in the cell selection and cell reselection process, the terminal needs to periodically perform cell measurement to obtain the signal quality of the current cell and the neighbor cell, so as to make the decision of cell selection and cell reselection. The measurement process needs to consume a large amount of energy, resulting in a large power consumption of the terminal.

[0104] Based on this, the present application provides a communication method, in which the network can maintain the wireless environment information of one or more areas, the wireless environment information of an area is related to the wireless signal transmission in the area, and the wireless environment information can indicate the cell signal quality in the area, such as RSRP and / or RSRQ. In addition, the network can broadcast the wireless environment information of the one or more areas, and the terminal in the network coverage can perform cell selection and / or cell reselection based on the wireless environment information broadcasted by the network. For example, the terminal can determine the cell signal quality of at least one cell at the location where it is located based on the wireless environment information of the area, and perform cell selection and / or cell reselection based on the cell signal quality of the at least one cell. Based on this scheme, in the cell selection and / or cell reselection process, the terminal does not need to periodically perform a large number of frequent measurements, so as to reduce the terminal power consumption caused by frequent measurements.

[0105] The technical solutions of the embodiments of the present application can be applied to various communication systems, which can be a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, a fourth generation (4th generation, 4G) system, a new radio (NR) system, a fifth generation (5th generation, 5G) system, a system of mixed networking of LTE and 5G, a communication and sensing integrated system, a non-terrestrial network (NTN), a device-to-device (D2D) communication system, a vehicle to everything (V2X) communication system, a machine-type communication (MTC) system, an internet of things (IoT) system, or other future communication systems. The communication system can also be a non-3GPP communication system, which is not limited.

[0106] It should be noted that the above-mentioned communication system to which the present application is applied is only an example, and the communication system to which the present application is applied is not limited thereto. The communication system provided by the present application does not cause any limitation to the solutions of the present application. Here, it is uniformly stated that the following will not be described in detail.

[0107] FIG. 2 shows a possible, non-limiting system diagram. As shown in FIG. 2, the communication system 20 includes a radio access network (RAN) 200 and a core network (CN) 300. The RAN 200 includes at least one RAN node (such as 210a and 210b in FIG. 2, collectively referred to as 210) and at least one terminal (such as 220a-220j in FIG. 2, collectively referred to as 220). The core network 300 includes at least one core network device.

[0108] Optionally, the RAN 200 can also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 2), etc. The terminal 220 is connected to the RAN node 210 in a wireless manner. The RAN node 210 is connected to the core network 300 in a wireless or wired manner. The core network device in the core network 300 and the RAN node 210 in the RAN 200 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0109] In a possible implementation, the core network device can refer to a device in the core network 300 that provides service support for the terminal. In the embodiments of the present application, the core network device in the core network 300 includes a sensing function (SF) network element, which is mainly used to implement sensing functions, such as sensing control functions and / or sensing calculation functions. Further, the SF network element can also support sensing billing functions when the terminal and / or the RAN node perform sensing.

[0110] For example, the sensing control function can include determining sensing devices, sensing nodes, and the like. The sensing device can be understood as a device that transmits and / or receives a sensing signal, and further performs corresponding signal processing on the received echo signal to obtain sensing measurement data. For example, the sensing device can be a RAN node or a terminal, and the like. The sensing node can refer to a network node participating in the sensing service process in the wireless network. The sensing calculation function can include performing corresponding signal processing on the echo signal received by the sensing device to obtain sensing measurement data, and further processing the sensing measurement data and application information to obtain sensing results, and the like.

[0111] For example, the SF network element can also be referred to as a communication device. For example, the SF network element can be understood as a communication device with core network sensing functions. In addition, the SF network element can also be referred to as a sensing server, and the like, without limitation.

[0112] In a possible scenario, the functions of the SF network element can be implemented by a network data analysis function (NWDAF) network element, or the SF network element and the NWDAF network element can be combined, or the functions of the SF network element can be implemented by an existing other network element, or combined with other network elements, without limitation.

[0113] Optionally, in addition to the SF network element, the core network devices in the core network 300 can also include at least one of the following: an access and mobility management function (AMF) network element, a session management function (SMF) network element, a user plane function (UPF) network element, a policy control function (PCF) network element, a unified data management (UDM) network element, an application function (AF) network element, a network exposure function (NEF) network element, a location management function (LMF) network element, and the like. Of course, the core network 300 can also include other core network devices, which are not limited.

[0114] The AMF network element is mainly responsible for mobility management in the mobile network, such as user location update, user registration network, user handover, and the like. The SMF network element is mainly responsible for session management in the mobile network, such as session establishment, modification, release, and the like. The UPF network element is a functional network element of the user plane, which is mainly responsible for connecting external networks and processing user messages, such as forwarding, charging, and the like. The PCF network element is mainly responsible for providing policies to the AMF and SMF, such as quality of service (QoS) policies, slice selection policies, and the like. The UDM network element is used to store user data, such as subscription information, authentication / authorization information, and the like. The AF network element is responsible for providing services to the 3GPP network. The NEF network element is mainly used to open the capabilities of various network functions and is responsible for converting internal and external information. The LMF network element is mainly responsible for location management, for example, it can initiate a positioning process and position a specific terminal.

[0115] It should be noted that the network element in the present application can also be referred to as an entity or a functional entity, for example, the SF network element can also be referred to as an SF entity or an SF functional entity. In addition, the above-mentioned AMF network element, SMF network element, UPF network element, PCF network element, UDM network element, AF network element, NEF network element, and LMF network element can also have other names in future communication systems, which are not limited in the present application.

[0116] Exemplarily, as shown in FIG. 3, it is a specific implementation of the system shown in FIG. 2. In which, the SF network element exists an interface with network elements such as AMF, and can communicate through the interface. For example, the SF network element and the AMF network element exist an NS1 interface, the SF network element and the NEF network element exist an NS2 interface, the SF network element and the UDM network element exist an NS3 interface, the SF network element and the NWDAF network element exist an NS4 interface, the SF network element and the LMF network element exist an NS6 interface, and the SF network element and the PCF network element exist an NS5 interface. It can be understood that the interface between the SF network element and other network elements can also have other names, which are not limited in the present application.

[0117] In addition, the perception control signaling between the SF network element and the RAN node / terminal can be transmitted through the AMF network element, and the perception measurement data obtained by the RAN node / terminal can be transmitted to the SF network element via the control plane or the user plane. When the perception measurement data is transmitted via the user plane, it can be forwarded by the UPF or directly transmitted to the SF network element; when the perception measurement data is transmitted via the control plane, it can be forwarded by the AMF network element.

[0118] In a possible implementation, the RAN 200 can be a 3GPP related cellular system, for example, a 4G, 5G mobile communication system, or a future-oriented evolution system. The RAN 200 can also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (CRAN), an NTN network (such as an NTN supporting a transparent mode and / or a regenerative mode, or an NTN supporting a gaze mode (earth fixed cell) and / or a non-gaze mode (earth moving cell)), or a wireless fidelity (WiFi) system. The RAN 200 can also be a communication system in which two or more of the above systems are fused.

[0119] In some scenarios, the roles of the RAN nodes 210 and the terminals 220 are relative, for example, the network element 220i in FIG. 2 can be a helicopter or a drone, which can be configured as a mobile base station. For a terminal 220j accessing the RAN 200 through the network element 220i, the network element 220i is a base station; but for the base station 210a, the network element 220i is a terminal. The RAN nodes 210 and the terminals 220 are sometimes collectively referred to as communication devices, for example, the network elements 210a and 210b in FIG. 2 can be understood as communication devices with base station functions, and the network elements 220a-220j can be understood as communication devices with terminal functions.

[0120] In some scenarios, the communication between the RAN node 210 and the terminal 220 follows a certain protocol layer structure, which can include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer can include at least one of a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer, etc. The user plane protocol layer can include at least one of a service data adaptation protocol (SDAP) layer, a PDCP layer, an RLC layer, a MAC layer, or a physical layer, etc.

[0121] As a possible implementation, the terminal 220 can also be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely applied to various scenarios, such as D2D, V2X communication, MTC, IoT, virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the device form of the terminal.

[0122] As a possible implementation, the RAN node 210, which can also be referred to as a RAN entity or an access node, etc., constitutes a part of the communication system, to help the terminal to realize wireless access. The multiple RAN nodes 210 in the communication system 20 can be nodes of the same type or nodes of different types.

[0123] In one possible scenario, the RAN node 210 can be a base station, an evolved Node B (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a base station in a future mobile communications system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (e.g., 210a in Figure 2), a micro base station or indoor station (e.g., 210b in Figure 2), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the RAN node in V2X technology can be a road side unit (RSU). All or part of the functions of the RAN node in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g., a cloud platform). The RAN node in this application can also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0124] In another possible scenario, multiple RAN nodes cooperate to assist terminal devices to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can be included in the same network element, for example, included in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, for example, included in a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0125] The CU (or CU-CP and CU-UP), DU or RU can also have different names in different systems, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an O-RAN central unit (O-CU), the DU can also be referred to as an O-RAN distributed unit (O-DU), the CU-CP can also be referred to as an O-RAN central unit control plane (O-CU-CP), the CU-UP can also be referred to as an O-RAN central unit user plane (O-CU-UP), and the RU can also be referred to as an O-RAN radio unit (O-RU). Any of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0126] For example, as shown in FIG. 4, it is a possible and non-limiting schematic diagram of an O-RAN system. The CU, DU and RU cooperate to assist the terminal device to implement wireless access. The CU, DU and RU can be included in an access network device, and the CU and DU can be included in the BBU of the access network device. The access network device is a device deployed in the RAN to help the terminal to implement wireless access, such as a base station, a gNB, a base station in a future mobile communication system, etc.

[0127] Referring to FIG. 4, the access network device communicates with the core network device through a backhaul link and communicates with the terminal through an air interface. Specifically, the BBU of the access network device communicates with the core network device through the backhaul link, and the RU of the access network device communicates with at least one terminal device through the air interface. The BBU communicates with at least one RU through a fronthaul link, and the CU communicates with at least one DU through a midhaul link. The BBU and the RU can be co-located or not co-located.

[0128] As a possible implementation, the CU and the DU respectively implement part of the protocol layer functions of the access network device, such as part of the protocol layer functions implemented in the CU and the remaining part or all of the protocol layer functions implemented in the DU. The CU can control one or more DUs.

[0129] As shown in FIG. 5, the CU can deploy the RRC layer, the SDAP layer and the PDCP layer, or in other words, the CU can be understood as a logical node carrying the RRC layer, the SDAP layer and the PDCP layer of the access network device. Thus, the CU has the processing capability of the RRC, PDCP and SDAP layers, and of course, the CU can also implement or carry other control functions. The DU can deploy the RLC layer, the MAC layer and the PHY layer, or in other words, the DU can be understood as a logical node carrying the RLC layer, the MAC layer and the PHY layer, and thus, the DU has the processing capability of the RLC, MAC and PHY layers, and of course, the DU can also implement or carry other functions.

[0130] Optionally, the CU is connected to network nodes such as core network nodes through some interfaces, which can be E2 interfaces and the like. In addition, the CU can also implement part of the functions of the core network. The CU (e.g., the PDCP layer and higher layers) is connected to the DU (e.g., the RLC layer and lower layers) through some interfaces, which can be F1 interfaces and the like. In some examples, these interfaces (e.g., the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). For example, the F1 supports the control plane function through F1-C and supports the user plane function through F1-U.

[0131] In an example, the CU can include a CU-CP and a CU-UP. As shown in FIG. 6, the CU-CP can be understood as a logical node carrying the RRC layer and the control plane part of PDCP (PDCP-C), and is used to implement the control plane function of the CU, and the CU-CP can communicate with the DU through F1-C. The CU-UP can be understood as a logical node carrying the SDAP layer and the user plane part of PDCP (PDCP-U), and is used to implement the user plane function of the CU, and the CU-UP can communicate with the DU through F1-U.

[0132] The CU-CP can interact with a network element in the core network for implementing the control plane function, and the network element in the core network for implementing the control plane function can be an access and mobility function network element, such as an AMF network element in a 5G system. The CU-UP can interact with a network element in the core network for implementing the user plane function, and the network element in the core network for implementing the user plane function can be a UPF network element, for example.

[0133] The above function division of the CU and the DU is merely an example and does not limit the CU and the DU. In addition, the CU and the DU can be configured to have the functions as needed. For example, the CU or the DU can be configured to be a node having more protocol layer functions, or the CU or the DU can be configured to be a node having partial processing functions of the protocol layer. For example, partial functions of the RLC layer and functions of the protocol layer above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of the protocol layer below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to a service type or other system requirements, for example, according to a delay, and functions that need to meet a delay requirement are arranged in the DU, and functions that do not need to meet the delay requirement are arranged in the CU.

[0134] For example, in some examples, the CU can not carry the PDCP layer, that is, only carries the RRC layer. The CU-CP can not carry the PDCP-C, the CU-UP can not carry the PDCP-U, or the CU-UP can not exist. In some other examples, the DU can not carry the RLC layer. In addition, there can be no CU and only the DU.

[0135] As a possible implementation, the DU and the RU can cooperate to jointly implement the functions of the PHY layer. For example, as shown in FIG. 7, the DU can deploy the RLC layer, the MAC layer, and the higher physical layer (Higher PHY). The RU can deploy the lower physical layer (Lower PHY) and the radio frequency (RF) processing function. The DU can control at least one RU, and the DU and the RU can communicate through a front transmission interface. The DU and the RU can be co-located or not co-located.

[0136] The higher physical layer is closer to the MAC layer, and the functions of the higher physical layer can include at least one of the following: forward error correction (FEC) encoding / decoding, scrambling / descrambling, modulation / demodulation, and the like. The lower physical layer is closer to the radio frequency side, and the functions of the lower physical layer can include at least one of the following: fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), digital beamforming, and filtering, and the like.

[0137] Referring to FIG. 7, the DU and the RU interact control plane information and user plane information via a lower-layer split control user synchronization (LLS-CUS) interface over a fronthaul link. The LLS-CUS interface can include a LLS-C interface (for providing a control plane C-Plane) and a LLS-U interface (for providing a user plane U-Plane). In addition, the DU and the RU interact management information via a LLS-M interface over the fronthaul link, which provides a management plane (M-Plane). Illustratively, the control plane C-Plane refers to real-time control between the DU and the RU; the management plane M-Plane refers to non-real-time management operation between the DU and the RU.

[0138] The above functional split of the DU and the RU is merely an example and does not constitute a limitation on the DU and the RU. The functions of the DU and the RU can be configured in various ways according to design. For example, the DU is configured to implement baseband functions, the RU is configured to implement radio frequency functions, and the like.

[0139] As a possible implementation, the O-RAN system can further include a non-real time RAN intelligent controller (Non-RT RIC or NRT RIC) and / or a near-real time RAN intelligent controller (Near-RT RIC or nRT RIC).

[0140] The Non-RT RIC is configured to implement non-real-time intelligent management of the RAN, and is capable of implementing artificial intelligence (AI) / machine learning (ML) including model training and model updating, and guiding applications / functions in the Near-RT RIC based on a policy. The Near-RT RIC is configured to implement near-real-time intelligent management of the RAN, and implements near-real-time control and optimization of modules and resources of the O-RAN through data collection and related operations on an E2 interface. The E2 interface can be understood as an open interface between two nodes (or endpoints).

[0141] In yet another possible scenario, the RAN node 210 can be a sensing unit (SU), which is mainly configured to implement functions related to sensing, such as transmitting a sensing signal and / or receiving an echo signal of the sensing signal, performing corresponding signal processing on the received echo signal to obtain sensing measurement data, performing sensing-related processing, and the like.

[0142] As a possible implementation, the access network device can include at least one of the CU, the DU, the SU and the RU. There is a communication interface between the CU and the SU. There can be a communication interface between the SU and the DU, or there can be no communication interface between the SU and the DU. In the case where there is no communication interface between the SU and the DU, the SU and the DU can communicate through the CU.

[0143] It should be noted that the system described in the embodiments of the present application is to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of network architecture and the appearance of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0144] The communication method provided by the embodiments of the present application will be described below by taking the interaction between the communication devices in the communication system shown in FIG. 2 as an example. It should be noted that in the following embodiments of the present application, the names of messages between the communication devices, the names of parameters, or the names of information, etc. are only examples, and in other embodiments, they can also be other names, and the method provided by the present application does not make specific limitations on this.

[0145] It can be understood that in the embodiments of the present application, each communication device can perform part or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and the embodiments of the present application can also perform other operations or variations of various operations. In addition, each step can be executed in a different order as presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application are executed.

[0146] It can be understood that the communication device is taken as an example of the execution subject of the interaction in the present application, but the present application does not limit the execution subject of the interaction. For example, the method executed by the communication device in the present application can also be executed by a module (such as a chip, a chip system, or a processor) applied to the communication device, and can also be realized by a logic node, a logic module or software that can realize all or part of the functions of the communication device.

[0147] The communication method provided by the embodiments of the present application will be described below. As shown in FIG. 8, the communication method can include the following steps:

[0148] S801, the first RAN node acquires first wireless environment information.

[0149] The first wireless environment information is information related to the transmission of wireless signals in the first area. Alternatively, it can also be understood that the first wireless environment information is information related to the propagation environment of the wireless signals in the first area.

[0150] The first radio environment information indicates a cell signal quality in the first area. The cell signal quality can include RSRP, or include RSRP and RSRQ. For example, in a cell selection scenario, the cell signal quality includes RSRP and RSRQ; in a cell reselection scenario, the cell signal quality includes RSRP.

[0151] For example, the cell signal quality in the first area can be understood as the signal quality of a cell signal from a transmitter after the cell signal passes through a radio environment and is received in the first area. The first radio environment information can indicate the signal quality of a cell signal of at least one cell after the cell signal passes through a radio environment and is received in the first area, i.e., the cell signal quality in the first area can include the cell signal quality of at least one cell.

[0152] As a possible implementation, the first area can be a geographical area. For example, the geographical area can refer to a three-dimensional space area, which can also be referred to as a space area, a three-dimensional area, a three-dimensional grid (3D grid), a grid, etc., and the name of the geographical area is not limited in the present application. Alternatively, the geographical area can also be a planar area, which is not limited in the present application. For example, the geographical area can have at least one of the following properties: shape, contour, size, radius, area, geographical position, height, etc. The shape, contour, size, radius, and area of different geographical areas can or can not be the same. Different geographical areas have different geographical positions. There can or can not be overlap between different geographical areas.

[0153] For example, the contour of the geographical area and the points in the geographical area can be described by a three-dimensional coordinate system such as an earth-centered earth-fixed (ECEF) coordinate system, a geodetic coordinate system, an earth-centered inertial (ECI) coordinate system, etc. The shape of the geographical area can be a regular hexagon, or other shapes such as a regular pentagon, a circle, an ellipse, etc. Alternatively, the shape of the geographical area can also be an irregular shape, which is not limited.

[0154] For example, a plurality of geographical areas can be divided on the earth, and the plurality of geographical areas can be indexed (e.g., numbered). For example, the geographical position of a certain geographical area is determined by the identifier of the geographical area, i.e., the geographical position of the geographical area can be obtained according to the identifier of the geographical area, or in other words, there is an association relationship between the identifier of the geographical area and the geographical position of the geographical area.

[0155] As another possible implementation, the first area can be a logical area. For example, the first area can be an area identified by an identity defined by a cellular network, such as a cell identity, a base station identity, a tracking area (TA) identity, or the like.

[0156] As a possible implementation, the first area can be part or all of the area in the coverage area of the first RAN node, or the first area can be part or all of the area in the coverage area of another RAN node, without limitation. The coverage area of the first RAN node and the area of the other RAN node can or can not overlap.

[0157] As a possible implementation, the first RAN node can obtain the first radio environment information after starting up; or the first RAN node can obtain the first radio environment information in a scenario where the terminal needs to save energy. Of course, the first RAN node can also obtain the first radio environment information in other scenarios, for example, in a scenario where an operation, administration and maintenance (OAM) system configures the first RAN node to configure to start (or take effect) radio environment information acquisition, the first RAN node obtains the first radio environment information. The application does not make specific limitations on the scenarios in which the first RAN node obtains the first radio environment information, and the above exemplary scenarios do not impose any limitations on the solution.

[0158] As a possible implementation, the first RAN node can periodically obtain the first radio environment information. Since the transmission of a radio signal is affected by the environment, and the environment can change, the first radio information related to the transmission of a radio signal in the first area can also change, i.e., the first RAN node can obtain different first radio environment information at different times.

[0159] S802, the first RAN node sends the first radio environment information. Correspondingly, the terminal receives the first radio environment information from the first RAN node.

[0160] As a possible implementation, the first RAN node can send the first radio environment information in a broadcast manner. For example, the first radio environment information is carried in system information or system messages for transmission. In addition, when the first radio environment information is transmitted in a broadcast manner, the first radio environment information can be secured, such as encrypted and / or integrity protected.

[0161] As a possible implementation, the first RAN node can periodically send the first radio environment information. Since the first radio environment information can change, the first RAN node can send different first radio environment information at different times.

[0162] S803, the terminal performs cell selection and / or cell reselection according to the first radio environment information.

[0163] As a possible implementation, the terminal can be any terminal in RRC non-connected state located within the coverage area of the first RAN node.

[0164] As a possible implementation, the terminal can perform cell selection and / or cell reselection according to the first radio environment information and the location information of the terminal. Alternatively, the terminal can perform cell selection and / or cell reselection according to the first radio environment information and at least one measurement quantity of the terminal. Details will be described in subsequent embodiments, which are not repeated here.

[0165] Based on this scheme, the network can maintain and send information related to wireless signal transmission in a certain area, which can indicate the cell signal quality in the area, so that the terminal in the network coverage can perform cell selection and / or cell reselection based on the information sent by the network. For example, the terminal can determine the cell signal quality of at least one cell at its location based on the radio environment information of a certain area, and perform cell selection and / or cell reselection based on the cell signal quality of the at least one cell. That is, the terminal does not need to perform a large number of measurements periodically during cell selection and / or cell reselection, so as to reduce the power consumption of the terminal due to frequent measurements. In addition, since the wireless signal transmission related information of the terminal does not need to be obtained by measurement, the network side can reduce the transmission frequency of the downlink reference signal, or in other words, increase the transmission period of the downlink reference signal, so as to reduce the power consumption of the network side and save resource overhead.

[0166] The flow of the communication method provided by the present application is described above, and the related implementation involved in the method is described in detail below.

[0167] In a possible implementation, the first radio environment information can include the cell signal quality in the first area. That is, the first radio environment information can include the signal quality at the cell level. The signal quality at the cell level can be understood as the signal quality of different cells on different frequency points. For example, taking the case that the signals of cell A and cell B can be received in the first area as an example, the first radio environment information can include the signal quality of cell A and the signal quality of cell B.

[0168] In another possible implementation, the first radio environment information can comprise beam level signal quality in the first area, which is used to determine cell signal quality in the first area. For example, assuming that the signals transmitted by beam 1 and beam 2 of cell A and the signals transmitted by beam 3 and beam 4 of cell B can be received in the first area, the first radio environment information can comprise signal quality corresponding to beam 1, beam 2, beam 3 and beam 4 respectively, wherein the signal quality corresponding to beam 1 and beam 2 can be used to determine the signal quality of cell A, and the signal quality corresponding to beam 3 and beam 4 can be used to determine the signal quality of cell B.

[0169] In a possible implementation, the first radio environment information can further comprise at least one of the following: channel eigenvalue, channel matrix, large-scale fading information, small-scale fading information, multipath information or interference information.

[0170] As a possible implementation, the channel matrix can be used to represent the channel between the transmitting and receiving antennas. For a channel matrix of MxN dimensions, M represents the number of transmitting antennas and N represents the number of receiving antennas. The element a o,j in the channel matrix can represent the channel (represented by a complex number) between the transmitting antenna i and the receiving antenna j. After singular value decomposition (SDV) of the channel matrix, a left unitary matrix U, a diagonal matrix S and a right unitary matrix V can be obtained.

[0171] As a possible implementation, the channel eigenvalue can also be understood as a spatial eigenvalue, which can be related information of the diagonal matrix S obtained after SDV of the channel matrix, and / or related information of the left unitary matrix U and the right unitary matrix V.

[0172] As a possible implementation, the large-scale fading information is used to describe the change of signal power of the radio electromagnetic wave signal in a long distance (e.g. much larger than the wavelength) or a long time range.

[0173] As a possible implementation, the small-scale fading information is used to describe the change of signal power of the radio electromagnetic wave signal in a very short distance (e.g. several or tens of wavelengths) or a very short time (e.g. seconds).

[0174] As a possible implementation, the multipath information can comprise time domain channel parameters and / or frequency domain channel parameters of each path in the multipath channel. Exemplarily, the time domain channel parameters can comprise at least one of: channel multipath power, channel multipath delay, channel multipath azimuth of arrival (AOA), channel multipath azimuth of departure (AOD), channel multipath zenith of arrival (ZOA), channel multipath zenith of departure (ZOD). The frequency domain channel parameters can be frequency domain channel responses or frequency domain channel coefficients.

[0175] As a possible implementation, the interference information is used to describe the interference level between RAN nodes, or information used to describe the interference signal, etc.

[0176] In a possible implementation, the level of the parameter in the first radio environment information other than the signal quality (i.e., RSRP, or RSRP and RSRQ) comprises a frequency point level, a cell level, or a beam level. The frequency point level means that the first radio environment information comprises radio environment information of different frequency points. For example, taking the case that there are frequency point 1 and frequency point 2 in the first area as an example, the first radio environment information can comprise radio environment information of frequency point 1 and radio environment information of frequency point 2. Wherein, the radio environment information comprises at least one of channel characteristic values, channel matrices, large-scale fading information, small-scale fading information, multipath information, or interference information.

[0177] The cell level means that the first radio environment information comprises radio environment information of different cells on a frequency point. For example, taking the case that there are frequency point 1 and frequency point 2 in the first area, cells on frequency point 1 comprise cell A and cell B, and cells on frequency point 2 comprise cell C and cell D as an example, the first radio environment information can comprise radio environment information of cell A, radio environment information of cell B, radio environment information of cell C, and radio environment information of cell D.

[0178] The beam level means that the first radio environment information comprises radio environment information of different beams of different cells on a frequency point. For example, taking the case that there are frequency point 1 and frequency point 2 in the first area, cells on frequency point 1 comprise cell A and cell B, cells on frequency point 2 comprise cell C and cell D, cell A comprises beam a and beam b, cell B comprises beam c and beam d, cell C comprises beam e and beam f, and cell D comprises beam g and beam h as an example, the first radio environment information can comprise radio environment information corresponding to beam a, beam b, beam c, beam d, beam e, beam f, beam g, and beam h respectively.

[0179] In a possible implementation, the first wireless environment information has a precision or spatial resolution attribute. The first area can be divided into a plurality of sub-areas based on the precision or spatial resolution, for example, taking the first area as a planar area, and taking the precision or spatial resolution as 1 x 1 meter (m), the first area can be divided into a plurality of 1 x 1 m sub-areas. The first wireless environment information includes wireless environment information at each sub-area of the first area, for example, including wireless environment information at a point or a center position on a vertex or a boundary of the sub-area.

[0180] For example, in a case where the level of the first wireless environment information is a frequency point level, the first wireless environment information includes wireless environment information of different frequency points at each sub-area. In a case where the level of the first wireless environment information is a cell level, the first wireless environment information includes wireless environment information of different cells on a frequency point at each sub-area. In a case where the level of the first wireless environment information is a beam level, the first wireless environment information includes wireless environment information of different beams of different cells on a frequency point at each sub-area.

[0181] In a possible implementation, the first wireless environment information is related to a RAN node (such as a gNB, a base station, a DU, a TRP, or the like). For example, for a certain position or sub-area in the first area, the first wireless environment information can include wireless environment information associated with a RAN node 1 and wireless environment information associated with a RAN node 2 at the position or sub-area. The wireless environment information associated with a RAN node can be understood as wireless environment information when performing wireless communication with the RAN node. For example, the cell signal quality associated with a RAN node at a certain position or sub-area can be understood as the quality of a certain cell signal of the RAN node received at the position or sub-area.

[0182] For example, in a case where the level of the first wireless environment information is a frequency point level, the first wireless environment information includes wireless environment information associated with at least one RAN node at different frequency points at the position or sub-area. For example, taking frequency point 1 and frequency point 2 at a certain position as an example, the first wireless environment information can include wireless environment information of frequency point 1 associated with a RAN node 1 at the position, and wireless environment information of frequency point 2 associated with the RAN node 1 at the position.

[0183] In a possible implementation, the first wireless environment information is determined according to perception environment information of the first area. The perception environment information of the first area is information related to a physical environment in the first area.

[0184] As a possible implementation, the first radio environment information can not exist, and the first RAN node can obtain the perception environment information of the first area in step S801. Correspondingly, in step S802, the first RAN node sends the perception environment information of the first area, and in step S803, the terminal performs cell selection and / or cell reselection according to the perception environment information of the first area. For example, the terminal can take the perception environment information of the first area as the input of an AI or ML algorithm, and perform cell selection and / or cell reselection according to the output of the AI or ML algorithm in an AI or ML manner.

[0185] As a possible implementation, the perception environment information of the first area is obtained through perception. For example, the SF network element can configure multiple perception devices to send perception signals, receive echo signals and perform corresponding signal processing to obtain perception measurement data, determine the perception result according to the perception measurement data, and determine the perception environment information of the first area according to the perception result. Therefore, it can also be considered that the perception environment information is obtained according to signal propagation information (such as the propagation information of the perception signal and the echo signal).

[0186] As a possible implementation, the perception environment information of the first area can include at least one of the type (such as buildings, vehicles, people, etc.), material, position, size, shape, motion speed, dielectric constant or reflection coefficient of a scatterer in the first area. For example, the physical environment of the first area can be reconstructed through the perception environment information of the first area. For example, the physical environment of the first area reconstructed through the perception environment information can be as shown in FIG. 9.

[0187] In a possible implementation, in step S803, the terminal can perform cell selection and / or cell reselection according to the first radio environment information and the position information of the terminal. For example, as shown in FIG. 10, step S803 can include steps S803a-S803b:

[0188] S803a, the terminal determines the second radio environment information according to the first radio environment information and the position information of the terminal.

[0189] Wherein, the position information of the terminal indicates the position of the terminal. For example, the position of the terminal can be represented by latitude and longitude, or by a coordinate point in a three-dimensional coordinate system such as the ECEF coordinate system, the ECI coordinate system, etc.

[0190] Wherein, the second radio environment information indicates the cell signal quality of at least one cell at the first position, and the first position is the position of the terminal. For example, the first position can also be referred to as the terminal position.

[0191] As a possible implementation, the terminal can determine the terminal location according to the location information of the terminal, and then determine the wireless environment information at the terminal location from the first wireless environment information, and determine the wireless environment information at the terminal location as the second wireless environment information.

[0192] S803b, the terminal performs cell selection and / or cell reselection according to the second wireless environment information.

[0193] As a possible implementation, the terminal can not process the cell signal quality in the second wireless environment information, and directly perform cell selection and / or cell reselection according to the cell signal quality.

[0194] As another possible implementation, the terminal can process the cell signal quality in the second wireless environment information based on its own antenna configuration (or other hardware capabilities) to obtain the terminal specific cell signal quality, i.e. UE specific cell signal quality, and then perform cell selection and / or cell reselection according to the terminal specific cell signal quality.

[0195] As a possible implementation, in the cell selection scenario, the terminal performs cell selection according to the second wireless environment information, including: the terminal takes the signal quality of at least one cell indicated by the second wireless environment information, or the terminal specific cell signal quality determined according to the signal quality of the at least one cell, as Q rxlevmeas and / or Q qualmeas in the S criterion. In addition, the values of other parameters in the S criterion, such as Q rxlevmin , Q qualmin , Q rxlevminoffset , Q qualminoffset , P compensation , Qoffset temp , can be the same as or different from the values of the corresponding parameters when cell selection is based on measurement, which is not limited.

[0196] As a possible implementation, in the cell reselection scenario, the signal quality of at least one cell at the first location indicated by the second wireless environment information can include the signal quality of the neighbor cell of the current serving cell of the terminal. At this time, the terminal performs cell reselection according to the second wireless environment information can include: the terminal takes the signal quality of at least one cell indicated by the second wireless environment information, or the terminal specific cell signal quality determined according to the signal quality of the at least one cell, as the S value of the target cell.

[0197] Further, the second radio environment information can also indicate a signal quality of the current serving cell. In this case, the terminal also takes the signal quality of the current serving cell indicated by the second radio environment information, or a terminal-specific signal quality of the current serving cell determined according to the signal quality of the current serving cell, as the S value of the current serving cell. The current serving cell can also be understood as a cell in which the terminal currently resides. The current serving cell can be a cell managed by the first RAN node, or in other words, the first RAN node is a RAN node to which the current serving cell belongs.

[0198] In addition, the values of other parameters in the cell reselection, such as ThreshXHigh, ThreshXHigh, ThrshServLow, ReselectionTimer, parameters in R criteria, etc., can be the same as or different from the values of the corresponding parameters in the current cell reselection based on measurement, which is not limited.

[0199] As a possible implementation, if the terminal determines the cell signal quality of only part of the neighboring cells (denoted as a first part of the neighboring cells) of the current serving cell according to the second radio environment information, the cell signal quality of another part of the neighboring cells (denoted as a second part of the neighboring cells) of the current serving cell can be obtained by measurement. In addition, the terminal can negatively offset the cell signal quality of the first part of the neighboring cells. For example, when the cell signal quality of the first part of the neighboring cells and the second part of the neighboring cells is sorted, the cell signal quality of the first part of the neighboring cells can be negatively offset.

[0200] As an example, taking the current serving cell (i.e., the cell in which the terminal resides) as the second cell, the second radio environment information indicates the cell signal quality of at least one first cell at a first location, and the at least one first cell is part of the neighboring cells of the second cell. In this case, the cell reselection performed by the terminal according to the second radio environment information can include: the terminal performs cell reselection according to the cell signal quality of the at least one first cell at the first location and an offset. The offset is used to negatively offset the cell signal quality of the at least one first cell at the first location.

[0201] In the case where the neighboring cells of the second cell also include at least one third cell, the cell reselection performed by the terminal includes: the terminal performs cell reselection according to the signal quality of the at least one first cell at the first location, the offset, and the cell signal quality of the at least one third cell. For example, the terminal can negatively offset the signal quality of the at least one first cell based on the offset, and then perform cell reselection according to the result after the negative offset and the signal quality of the at least one third cell. The signal quality of the at least one third cell can be obtained by measurement of the terminal.

[0202] For example, the negative offset of the signal quality of the first cell can be understood as: subtracting the offset (which is a positive number) from the signal quality of the first cell; or adding the offset (which is a negative number) to the signal quality of the first cell.

[0203] For example, the offset can be configured by the first RAN node, for example, the first RAN node can send the first indication information to indicate the offset, and the terminal receives the first indication information and obtains the offset accordingly. The first indication information can be carried in system information or system message. The first indication information and the first wireless environment information can be carried in the same message or different messages, which is not limited. In addition, the offset can also be referred to as the adjustment value of the cell signal quality. Of course, the offset can also have other names, which are not limited in the present application.

[0204] As an example, the terminal can determine whether there is a third cell based on the adjacent frequency point information of the current serving cell, or determine whether the at least one first cell is all adjacent cells of the second cell. The adjacent frequency point information of the current serving cell can be broadcast by the first RAN node. The adjacent frequency point information can indicate a list of adjacent frequency points, which includes at least one adjacent frequency point. For example, the adjacent frequency point information indicates that the list of adjacent frequency points includes {frequency point 1, frequency point 2, frequency point 3, frequency point 4, frequency point 5}.

[0205] After obtaining the second wireless environment information, the terminal can determine whether the at least one first cell includes all cells on the adjacent frequency points. If it includes all cells on the adjacent frequency points, the terminal can consider that there is no third cell; if it does not include some cells on the adjacent frequency points, the terminal can consider that there is a third cell, and then perform signal quality measurement of the third cell.

[0206] For example, taking the case that the at least one first cell includes only frequency point 1 and frequency point 2 as an example, the terminal performs measurement on frequency point 3, frequency point 4 and frequency point 5 to obtain the signal quality of the third cell on frequency point 3, frequency point 4 and frequency point 5. It can be understood that the terminal does not need to perform measurement on frequency point 1 and frequency point 2.

[0207] Based on the above scheme, in the cell reselection scenario, the terminal can obtain the cell signal quality of the remaining part of the neighbor cells through measurement, based on the cell signal quality of part of the neighbor cells obtained through the wireless environment information. Compared with the scheme of obtaining the cell signal quality of all the neighbor cells through measurement, the power consumption caused by measurement can be reduced. In addition, the cell signal quality of part of the neighbor cells obtained through the wireless environment information is negatively offset based on the offset, which is equivalent to reducing the priority of the part of the neighbor cells, so that the terminal can give priority to the priority of the neighbor cells that have been measured. Since the accuracy of the cell signal quality obtained through measurement is relatively high, giving priority to the neighbor cells that have been measured during cell reselection can improve the accuracy of cell reselection and the robustness of the whole scheme.

[0208] In another possible implementation, in the step S803, the terminal can perform cell selection and / or cell reselection according to the first wireless environment information and at least one measurement quantity of the terminal. For example, as shown in FIG. 10, the step S803 can include the following steps S8031-S8032:

[0209] S8031, the terminal determines the second wireless environment information according to the first wireless environment information and the at least one measurement quantity.

[0210] As a possible implementation, the at least one measurement quantity can include the cell signal quality of at least one cell. Further, the at least one measurement quantity can further include at least one of a signal arrival angle, a signal departure angle, a beam identifier, etc. For example, the at least one measurement quantity can be a historical measurement quantity of the terminal, for example, the measurement quantity is obtained in a measurement process performed by the terminal before the step S803, or is a measurement quantity obtained in a lower-frequency measurement performed by the terminal before the step S802; or the measurement quantity is a measurement quantity with a coarse granularity, or in other words, the accuracy of the measurement quantity is low.

[0211] As a possible implementation, the terminal can determine the position of the terminal according to the at least one measurement quantity, and then determine the second wireless environment information according to the position of the terminal and the first wireless environment information. Alternatively, the terminal can determine the wireless environment information in the first wireless environment information that is the same as or similar to the at least one measurement quantity as the second wireless environment information, without limitation.

[0212] S8032, the terminal performs cell selection and / or cell reselection according to the second wireless environment information. For details, refer to the related description in the step S803b, which will not be repeated here.

[0213] In a possible implementation, in step S802, the first RAN node can further send the second indication information and / or the third indication information, and correspondingly, the terminal can further receive the second indication information and / or the third indication information from the first RAN node. The second indication information indicates that the first radio environment information is the radio environment information corresponding to the first area, or indicates the area (i.e., the first area) in which the first radio environment information is valid (or effective). The third indication information indicates the validity time of the first radio environment information.

[0214] As a possible implementation, the second indication information can include an identifier of the first area, or include location information of a center point or a vertex or a point on a boundary of the first area.

[0215] As a possible implementation, in the case that the first RAN node further sends the second indication information, before step S803, the terminal determines whether the terminal is located in the first area, and if the terminal is located in the first area, the terminal performs step S803. That is, in the case that the terminal is located in the first area, the terminal performs cell selection and / or cell reselection based on the first radio environment information.

[0216] If the terminal is not located in the first area, the terminal can perform cell selection and / or cell reselection in a conventional manner. The reason why the terminal is not located in the first area can be that the first area is part or all of the coverage area of another RAN node other than the first RAN node, and the terminal is located in the coverage area of the first RAN node, or the first area is part of the coverage area of the first RAN node, and the terminal is located in another part of the coverage area of the first RAN node.

[0217] Optionally, in the case that the terminal is not located in the first area, the terminal can continue to receive radio environment information broadcast by a current cell. The radio environment information can be the first radio environment information updated by the first RAN node, or can be radio environment information of another area (e.g., a second area) broadcast by the first RAN node. If the terminal is located in the second area, the terminal can perform cell selection and / or cell reselection based on the radio environment information corresponding to the second area.

[0218] Optionally, in case the terminal is located outside the first area, after the terminal accesses the network (e.g. the terminal accesses the network by performing cell selection and / or cell reselection based on conventional measurement), the terminal can send a request information to the RAN node it accesses to, to request the radio environment information of a third area. For example, the third area can be the area where the terminal is currently located, or can be an area including the area where the terminal is currently located and having a larger range than the area where the terminal is currently located, or can be an edge area of the current serving cell of the terminal. The radio environment information of the third area can be used for subsequent cell selection and / or cell reselection of the terminal. In addition, the request information can include a request reason, such as that the terminal is not located in the valid area (i.e. the first area) of the first radio environment information.

[0219] As a possible implementation, the third indication information can include the start time and the end time of the valid time of the first radio environment information, or can include the start time and the length of the valid time, or can include the length of the valid time (in this case, the start time of the valid time can be the time when the terminal receives the third indication information).

[0220] As a possible implementation, in case the first RAN node also sends the third indication information, in step S803, the terminal determines whether the current time is within the valid time of the first radio environment information, or in other words, determines whether the current first radio environment information is valid, and if so, the terminal performs step S803. That is, the terminal performs cell selection and / or cell reselection according to the first radio environment information within the valid time of the first radio environment information.

[0221] Optionally, in case the first radio environment information is invalid, for example, in case the valid time of the first radio environment information has ended, the terminal can perform cell selection and / or cell reselection by using conventional measurement. In addition, the terminal can continue to receive the radio environment information broadcast by the current cell, and after the terminal accesses the network, the terminal can send a request information to the RAN node it accesses to, to request the radio environment information of another area, which can be referred to the foregoing description and will not be repeated here.

[0222] In a possible implementation, as shown in FIG. 11, in step S801, the first RAN node can obtain the first radio environment information by steps S801a-S801c, or can obtain the first radio environment information by steps S8011-S8013.

[0223] In steps S801a-S801c, the first RAN node receives the first radio environment information from the perception node, as shown in FIG. 11, which includes:

[0224] S801a, the first RAN node sends first request information to the perception node. Correspondingly, the perception node receives the first request information from the first RAN node. Exemplarily, the perception node can be an SF network element or an SU.

[0225] The first request information is used to request the wireless environment information of the first area. The first request information includes first area information used to indicate the first area. Exemplarily, in the case that the first area is a geographic area, the first area information can be coordinates of a central position of the first area, or an identifier of the first area, etc. In the case that the first area is a logical area, the first area information can be an identifier of the first area, such as a cell identifier, a base station identifier, a TA identifier, etc.

[0226] As a possible implementation, the first request information further includes at least one of the following: a parameter included in the first wireless environment information, a level of the first wireless environment information, wireless information of at least one RAN node in the first area, or a sending manner of the first wireless environment information. The RAN node here can refer to a device with wireless transmission capability deployed in an access network, such as a gNB, a base station, an access network device, a TRP, a DU, or a RU, etc.

[0227] Exemplarily, the parameter included in the first wireless environment information can be understood as a parameter that needs to be included in the first wireless environment information requested by the first RAN node. The parameter can include RSRP, or RSRP and RSRQ; further, it can also include at least one of channel characteristic values, channel matrices, large-scale fading information, small-scale fading information, multipath information, or interference information. The description of each parameter can be referred to the foregoing related description, which will not be repeated here.

[0228] Exemplarily, the level of RSRP and RSRQ can be cell level or beam level. The level of other parameters of the first wireless environment information includes frequency point level, cell level, or beam level, which can be referred to the foregoing related description of the level, which will not be repeated here.

[0229] Exemplarily, the wireless information of the RAN node includes at least one of the following: an antenna position of the RAN node, an antenna height, an antenna orientation angle, a transmission power, or a used frequency. The wireless information of the RAN node is used to determine the first wireless environment information. That is, the first wireless environment information can be determined according to the perception environment information of the first area and the wireless information of at least one RAN node in the first area.

[0230] Exemplarily, the sending manner of the first wireless environment information comprises event triggering or periodic sending. For example, the event triggering can refer to that the perception node sends the first wireless environment information to the first RAN node when part or all parameters in the first wireless environment information change. The periodic sending can refer to that the perception node periodically sends the first wireless environment information to the first RAN node according to a certain period.

[0231] S801b, the perception node determines the first wireless environment information.

[0232] As a possible implementation, the perception node can determine the first wireless environment information according to the perception environment information of the first area based on the request of the first request information. Exemplarily, the perception node can determine the first wireless environment information according to the perception environment information of the first area and the wireless information of at least one RAN node in the first area.

[0233] Exemplarily, the perception node can determine the first wireless environment information according to the perception environment information of the first area and the wireless information of at least one RAN node in the first area in a manner of RAY-Tracing, AI or ML.

[0234] As a possible implementation, the first wireless environment information determined by the perception node meets the request of the first request information. For example, the first wireless environment information determined by the perception node comprises parameters requested by the first RAN node, the level of the first wireless environment information is the level requested by the first RAN node, etc.

[0235] S801c, the perception node sends the first wireless environment information to the first RAN node. Correspondingly, the first RAN node receives the first wireless environment information from the perception node.

[0236] Based on the above scheme, the first RAN node can request the wireless environment information of a certain area from the perception node, without the first RAN node calculating the wireless environment information of the area by itself, which can reduce the processing complexity of the first RAN node.

[0237] In steps S8011-S8013, the first RAN node receives the perception environment information of the first area from the perception node, and determines the wireless environment information based on the perception environment information. Referring to FIG. 11, the steps S8011-S8013 comprise:

[0238] S8011, the first RAN node sends the second request information to the perception node. Correspondingly, the perception node receives the second request information from the first RAN node. Exemplarily, the perception node can be an SF network element or an SU.

[0239] The second request information is used to request the perception environment information of the first area. The perception environment information can be described in the foregoing description, which is not repeated here.

[0240] As a possible implementation, the second request information includes information of the first area. The information of the first area can be described in the foregoing step S801a, which is not repeated here.

[0241] Further, the second request information further includes at least one of the following: accuracy of the perception environment information, parameters included in the perception environment information, or a sending manner of the perception environment information.

[0242] For example, the accuracy of the perception environment information can also be understood as the spatial resolution of the perception environment information. The parameters included in the perception environment information can include at least one of the type, material, position, size, shape, motion speed, dielectric constant, or reflection coefficient of the scatterer in the first area. The sending manner of the perception environment information can include event triggering or periodic sending. The sending manner can be understood as a manner in which the perception node sends the perception environment information to the first RAN node, for example, event triggering can mean that the perception node sends the changed perception environment information to the first RAN node when some or all parameters in the perception environment information change or change greatly; periodic sending can mean that the perception node periodically sends the perception environment information to the first RAN node according to a certain period.

[0243] S8012, the perception node sends the perception environment information of the first area to the first RAN node. Correspondingly, the first RAN node receives the perception environment information of the first area from the perception node.

[0244] As a possible implementation, the perception node sends the perception environment information of the first area to the first RAN node according to the request or requirement of the second request information. The perception environment information sent by the perception node includes the parameters requested by the second request information.

[0245] It should be noted that the above steps S8011-S8012 can be understood as the first RAN node obtaining the perception environment information of the first area from the perception node. In addition, the first RAN node can also determine or collect the perception environment information of the first area by itself, for example, the first RAN node can send a perception signal in the direction of the first area, and receive a return signal of the perception signal, and perform perception based on the perception signal and the return signal, thereby determining the perception environment information of the first area. In this scenario, the above steps S8011-S8012 can not be performed.

[0246] S8013, the first RAN node determines the first wireless environment information according to the perception environment information of the first area.

[0247] The implementation of determining the first radio environment information by the first RAN node according to the perception environment information of the first area can refer to the implementation of determining the first radio environment information by the perception node in step S801b described above, which can refer to the foregoing related description and will not be described here.

[0248] Based on the foregoing scheme, the RAN node can determine the radio environment information of an area according to the perception environment information of the area. Therefore, the RAN node can flexibly determine the radio environment information based on actual conditions, such as flexibly determining the level of the radio environment information, the included parameters, and the like according to the use of the radio environment information, thereby improving flexibility.

[0249] In a possible implementation, after the terminal performs cell selection or cell reselection and successfully accesses the network, the terminal can further report the second radio environment information to the RAN node (such as the first RAN node) to which the terminal accesses, so that the RAN node processes according to the second radio environment information.

[0250] For example, when the second radio environment information includes the cell-level RSRQ and / or RSRQ, after the terminal reports the second radio environment information, the RAN node can perform radio link state detection or mobility management according to the second radio environment information; when the second radio environment information includes the beam-level RSRQ and / or RSRQ, after the terminal reports the second radio environment information, the RAN node can perform mobility management according to the second radio environment information.

[0251] For another example, when the second radio environment information includes the channel feature value and / or the channel matrix, the RAN node can determine the channel state information (CSI) between the terminal and the RAN node according to the second radio environment information. Further, the RAN node can further perform adaptive modulation, beamforming, optimization of a multi-antenna communication system, resource allocation, and the like according to the CSI.

[0252] As another possible implementation, when the second radio environment information includes large-scale fading information or interference information, the RAN node can determine the modulation and coding scheme (MCS) according to the second radio environment information. For example, when the large-scale fading or interference is small, the MCS can be a high-order MCS, which is used to improve the transmission rate; when the large-scale fading or interference is large, the MCS can be a low-order MCS, which is used to ensure transmission reliability.

[0253] As another possible implementation, in case the second radio environment information comprises small scale fading information or multipath information, the RAN node can determine the precoding scheme, such as a precoding matrix indicator (PMI), etc., according to the second radio environment information by means of channel decomposition.

[0254] In a possible implementation, for the above method embodiment, in a CU-DU architecture or an ORAN system, the functions of the first RAN node can be implemented by a CU, and the sensing node can be an SF network element. For example, in this scenario, the method shown in FIG. 11 can be modified into the method shown in FIG. 12, as shown in FIG. 12, the method comprises the following steps:

[0255] S1201, the CU obtains the first radio environment information.

[0256] As shown in FIG. 12, in step S1201, the CU can obtain the first radio environment information by steps S1201a-S1201c, or can obtain the first radio environment information by steps S12011-S12013.

[0257] In steps S1201a-S1201c, the CU receives the first radio environment information from the SF network element, as shown in FIG. 12, steps S1201a-S1201c comprise:

[0258] S1201a, the CU sends first request information to the SF network element. Correspondingly, the SF network element receives the first request information from the CU. Wherein, the first request information is used to request the radio environment information of the first area.

[0259] S1201b, the SF network element determines the first radio environment information.

[0260] S1201c, the SF network element sends the first radio environment information to the CU. Correspondingly, the CU receives the first radio environment information from the SF network element.

[0261] Wherein, the implementation of steps S1201a-S1201c can refer to the related description in steps S801a-S801c, which will not be repeated here.

[0262] In steps S12011-S12013, the CU receives the sensing environment information of the first area from the SF network element, and determines the radio environment information based on the sensing environment information, as shown in FIG. 12, steps S12011-S12013 comprise:

[0263] S12011, the CU sends second request information to the SF network element. Correspondingly, the SF network element receives the second request information from the CU. The second request information is used to request the perception environment information of the first area.

[0264] S12012, the SF network element sends the perception environment information of the first area to the CU. Correspondingly, the CU receives the perception environment information of the first area from the SF network element.

[0265] S12013, the CU determines the first wireless environment information according to the perception environment information of the first area.

[0266] The implementation of steps S12011-S12013 can refer to the related description in steps S8011-S8013 described above, and will not be repeated here.

[0267] S1202, the CU sends the first wireless environment information to the terminal. Correspondingly, the terminal receives the first wireless environment information from the CU.

[0268] For example, the CU can send the first wireless environment information to the terminal through the DU, and the terminal receives the first wireless environment information from the CU through the DU.

[0269] S1203, the terminal performs cell selection and / or cell reselection according to the first wireless environment information. For details, refer to the related description of step S803 described above, and will not be repeated here.

[0270] In another possible implementation, for the above method embodiment, in the CU-DU architecture or the ORAN system, the function of the above first RAN node can be implemented by the CU, and the perception node can be the SU. For example, in this scenario, the method shown in FIG. 11 can be modified into the method shown in FIG. 13, as shown in FIG. 13, the method includes the following steps:

[0271] S1301, the CU obtains the first wireless environment information.

[0272] As shown in FIG. 13, in step S1301, the CU can obtain the first wireless environment information through steps S1301a-S1301c described below, or can obtain the first wireless environment information through steps S13011-S13013 described below.

[0273] In steps S1301a-S1301c, the CU receives the first wireless environment information from the SU, as shown in FIG. 13, steps S1301a-S1301c include:

[0274] S1301a, the CU sends first request information to the SU. Correspondingly, the SU receives the first request information from the CU. The first request information is used to request the wireless environment information of the first area.

[0275] S1301b, the SU determines the first wireless environment information.

[0276] S1301c, the SU sends the first wireless environment information to the CU. Correspondingly, the CU receives the first wireless environment information from the SU.

[0277] The implementation of steps S1301a-S1301c can refer to the related description in steps S801a-S801c described above, and will not be repeated here.

[0278] In steps S13011-S13013, the CU receives the perception environment information of the first area from the SU, and determines the wireless environment information based on the perception environment information. Referring to FIG. 13, the steps S13011-S13013 include:

[0279] S13011, the CU sends second request information to the SU. Correspondingly, the SU receives the second request information from the CU. The second request information is used to request the perception environment information of the first area.

[0280] S13012, the SU sends the perception environment information of the first area to the CU. Correspondingly, the CU receives the perception environment information of the first area from the SU.

[0281] S13013, the CU determines the first wireless environment information according to the perception environment information of the first area.

[0282] The implementation of steps S13011-S13013 can refer to the related description in steps S8011-S8013 described above, and will not be repeated here.

[0283] S1302, the CU sends the first wireless environment information to the terminal. Correspondingly, the terminal receives the first wireless environment information from the CU.

[0284] For example, the CU can send the first wireless environment information to the terminal through the DU, and the terminal receives the first wireless environment information from the CU through the DU.

[0285] S1303, the terminal performs cell selection and / or cell reselection according to the first wireless environment information. The related description of step S803 described above can be referred to, and will not be repeated here.

[0286] In yet another possible implementation, for the above method embodiment, in a CU-DU architecture or an ORAN system, the functions of the above first RAN node can be implemented by a SU, and the awareness node can be an SF network element. For example, in this scenario, the method shown in FIG. 11 can be modified into the method shown in FIG. 14, referring to FIG. 14, the method includes the following steps:

[0287] S1401, the SU acquires the first wireless environment information.

[0288] As shown in FIG. 14, in step S1401, the SU can acquire the first wireless environment information through the following steps S1401a-S1401c, or can acquire the first wireless environment information through the following steps S14011-S14013.

[0289] In steps S1401a-S1401c, the SU receives the first wireless environment information from the SF network element, referring to FIG. 14, the steps S1401a-S1401c include:

[0290] S1401a, the SU sends first request information to the SF network element. Correspondingly, the SF network element receives the first request information from the SU. Wherein, the first request information is used to request the wireless environment information of the first area.

[0291] S1401b, the SF network element determines the first wireless environment information.

[0292] S1401c, the SF network element sends the first wireless environment information to the SU. Correspondingly, the SU receives the first wireless environment information from the SF network element.

[0293] Wherein, the implementation of steps S1401a-S1401c can refer to the related description in steps S801a-S801c described above, which will not be repeated here.

[0294] In steps S14011-S14013, the SU receives the awareness environment information of the first area from the SF network element, and determines the wireless environment information based on the awareness environment information, referring to FIG. 14, the steps S14011-S14013 include:

[0295] S14011, the SU sends second request information to the SF network element. Correspondingly, the SF network element receives the second request information from the SU. Wherein, the second request information is used to request the awareness environment information of the first area.

[0296] S14012, the SF network element sends the awareness environment information of the first area to the SU. Correspondingly, the SU receives the awareness environment information of the first area from the SF network element.

[0297] S14013、The SU determines the first wireless environment information according to the perceived environment information of the first area.

[0298] The implementation of steps S14011-S14013 can refer to the related description in steps S8011-S8013 described above, and will not be repeated here.

[0299] S1402、The SU sends the first wireless environment information to the terminal. Correspondingly, the terminal receives the first wireless environment information from the SU.

[0300] For example, the SU can send the first wireless environment information to the terminal through the DU, and the terminal receives the first wireless environment information from the SU through the DU; the SU can send the first wireless environment information to the DU through the CU, and the DU sends the first wireless environment information to the terminal.

[0301] S1403、The terminal performs cell selection and / or cell reselection according to the first wireless environment information. For details, refer to the related description of step S803 described above, and will not be repeated here.

[0302] It should be noted that all the functions described in the above Figs. 8-11 can be applied to the flowcharts shown in Figs. 12-14, and for details, refer to the related description above, which will not be repeated here.

[0303] The above describes the method provided by the present application. In addition, the present application also provides a communication device for implementing the functions described in the above method embodiments.

[0304] It can be understood that the communication device includes the corresponding hardware structure and / or software module for executing each function in order to implement the above functions. Those skilled in the art should easily realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of the present application.

[0305] The embodiments of the present application can divide the function modules of the communication device according to the above method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or software function module. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division. Actual implementation can have another division manner.

[0306] FIG. 15 shows a structural diagram of a communication device 150. The communication device 150 includes a processing module 1501 and a transceiving module 1502. The communication device 150 can be used to implement the functions of the terminal or the RAN node or the sensing node described above.

[0307] In some embodiments, the communication device 150 can further include a storage module (not shown in FIG. 15) for storing program instructions and data.

[0308] In some embodiments, the transceiving module 1502, which can also be referred to as a transceiver unit, is configured to implement the transmitting and / or receiving functions. The transceiving module 1502 can be constituted by a transceiving circuit, a transceiver, a transceiver, or a communication interface.

[0309] In some embodiments, the transceiving module 1502 can include a receiving module and a transmitting module, which are respectively configured to perform the receiving and transmitting steps of the terminal or the RAN node or the sensing node in the method embodiments described above, and / or other processes for supporting the technologies described herein; and the processing module 1501 can be configured to perform the processing steps of the terminal or the RAN node or the sensing node in the method embodiments described above, and / or other processes for supporting the technologies described herein.

[0310] When the communication device 150 is used to implement the functions of the terminal:

[0311] The transceiving module 1502 is configured to receive first radio environment information from a first radio access network (RAN) node, the first radio environment information being information related to radio signal transmission in a first area, and the first radio environment information indicating cell signal quality in the first area, the cell signal quality including reference signal received power (RSRP) or including RSRP and reference signal received quality (RSRQ); and the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information.

[0312] Optionally, the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information, including: the processing module 1501 is configured to determine second radio environment information according to the first radio environment information and location information of the terminal, the second radio environment information indicating cell signal quality of at least one cell at a first location, the first location being a location of the terminal; and the processing module 1501 is further configured to perform cell selection and / or cell reselection according to the second radio environment information.

[0313] Optionally, the second radio environment information indicates a cell signal quality of at least one first cell at the first location, the at least one first cell being a neighbor cell of the second cell, and the second cell being a cell in which the terminal resides, and the processing module 1501 is configured to perform cell selection and / or cell reselection according to the second radio environment information, including: the processing module 1501 is configured to perform cell reselection according to the cell signal quality of the at least one first cell at the first location and an offset, and the offset is configured to negatively offset the cell signal quality of the at least one first cell.

[0314] Optionally, the processing module 1501 is further configured to measure a cell signal quality of at least one third cell, the at least one third cell being a neighbor cell of the second cell, and the processing module 1501 is configured to perform cell reselection according to the cell signal quality of the at least one first cell at the first location and the offset, including: the processing module 1501 is configured to perform cell reselection according to the cell signal quality of the at least one first cell at the first location, the offset, and the cell signal quality of the at least one third cell.

[0315] Optionally, the transceiver module 1502 is further configured to receive first indication information from the first RAN node, the first indication information indicating the offset.

[0316] Optionally, the first radio environment information is determined according to perception environment information of the first area, and the perception environment information of the first area is information related to a physical environment in the first area.

[0317] Optionally, the transceiver module 1502 is further configured to receive second indication information from the first RAN node, the second indication information indicating that the first radio environment information is wireless environment information corresponding to the first area.

[0318] Optionally, the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information, including: the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information in a case that the terminal is located in the first area.

[0319] Optionally, the transceiver module 1502 is further configured to receive third indication information from the first RAN node, the third indication information indicating a valid time of the first radio environment information.

[0320] Optionally, the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information, including: the processing module 1501 is configured to perform cell selection and / or cell reselection according to the first radio environment information in a case that the valid time of the first radio environment information is within a valid time.

[0321] Optionally, the first radio environment information indicates a cell signal quality in the first area, including: the first radio environment information comprises the cell signal quality in the first area; or the first radio environment information comprises a beam level signal quality in the first area, and the beam level signal quality is used to determine the cell signal quality in the first area.

[0322] Optionally, the first radio environment information further comprises at least one of: a channel characteristic value, a channel matrix, large scale fading information, small scale fading information, multipath information, or interference information.

[0323] When the communication apparatus 150 is configured to implement a function of a RAN node, the communication apparatus 150 comprises:

[0324] The processing module 1501 is configured to acquire first radio environment information, the first radio environment information being information related to wireless signal transmission in a first area, and the first radio environment information indicating a cell signal quality in the first area, the cell signal quality comprising a reference signal received power (RSRP) or comprising an RSRP and a reference signal received quality (RSRQ); and the transceiver module 1502 is configured to send the first radio environment information.

[0325] Optionally, the first radio environment information is determined according to sensing environment information of the first area, the sensing environment information of the first area being information related to a physical environment in the first area.

[0326] Optionally, the processing module 1501 is configured to acquire the first radio environment information by: sending, by the transceiver module 1502, first request information to a sensing node, the first request information being used to request radio environment information of the first area; and receiving, by the transceiver module 1502, the first radio environment information from the sensing node.

[0327] Optionally, the first request information comprises information of the first area and at least one of: a parameter included in the first radio environment information, a level of the first radio environment information, or radio information of at least one radio access network (RAN) node in the first area; the level of the first radio environment information comprises a cell level or a beam level; and the radio information of the RAN node comprises at least one of: an antenna position, an antenna height, an antenna orientation angle, a transmission power, or a frequency used by the RAN node.

[0328] Optionally, the processing module 1501 is configured to acquire the first wireless environment information, including: the processing module 1501 is configured to send second request information to the sensing node through the transceiver module 1502, the second request information is used to request sensing environment information of the first area; the processing module 1501 is further configured to receive the sensing environment information of the first area from the sensing node through the transceiver module 1502, the sensing environment information of the first area is information related to the physical environment in the first area; and the processing module 1501 is further configured to determine the first wireless environment information according to the sensing environment information of the first area.

[0329] Optionally, the second request information includes information of the first area and at least one of the following: accuracy of the sensing environment information, parameters included in the sensing environment information, or a sending mode of the sensing environment information. The parameters included in the sensing environment information indicate at least one of the following: type, material, position, size, shape, motion speed, dielectric constant, or reflection coefficient of a scatterer in the first area; and the sending mode includes event triggering or periodic sending.

[0330] Optionally, the processing module 1501 is configured to determine the first wireless environment information according to the sensing environment information of the first area, including: the processing module 1501 is configured to determine the first wireless environment information according to the sensing environment information of the first area and wireless information of at least one RAN node in the first area. The wireless information of the RAN node includes at least one of the following: antenna position, antenna height, antenna orientation angle, transmission power, or frequency used of the RAN node.

[0331] Optionally, the transceiver module 1502 is further configured to send first indication information, the first indication information indicates an offset, and the offset is used to negatively offset the cell signal quality determined according to the first wireless environment information.

[0332] Optionally, the transceiver module 1502 is further configured to send second indication information, the second indication information indicates that the first wireless environment information is the wireless environment information corresponding to the first area.

[0333] Optionally, the transceiver module 1502 is further configured to send third indication information, the third indication information indicates a valid time of the first wireless environment information.

[0334] Optionally, the first wireless environment information indicates the cell signal quality in the first area, including: the first wireless environment information includes the cell signal quality in the first area; or the first wireless environment information includes beam level signal quality in the first area, and the beam level signal quality is used to determine the cell signal quality in the first area.

[0335] Optionally, the first radio environment information further comprises at least one of: a channel feature value, a channel matrix, large-scale fading information, small-scale fading information, multipath information, or interference information.

[0336] When the communication apparatus 150 is configured to implement the function of the sensing node, as one possible implementation:

[0337] The transceiver 1502 is configured to receive first request information from the first RAN node, the first request information being used to request radio environment information of a first area; the processing module 1501 is configured to determine the first radio environment information according to the first request information; and the transceiver 1502 is further configured to send the first radio environment information to the first RAN node. The first radio environment information is information related to wireless signal transmission in the first area, and the first radio environment information indicates cell signal quality in the first area, the cell signal quality including reference signal received power (RSRP) or including RSRP and reference signal received quality (RSRQ).

[0338] When the communication apparatus 150 is configured to implement the function of the sensing node, as another possible implementation:

[0339] The transceiver 1502 is configured to receive second request information from the first RAN node, the second request information being used to request sensing environment information of the first area, the sensing environment information of the first area being information related to a physical environment in the first area; and the transceiver 1502 is further configured to send the sensing environment information of the first area to the first RAN node, the sensing environment information of the first area being used to determine the first radio environment information, the first radio environment information being information related to wireless signal transmission in the first area, and the first radio environment information indicating cell signal quality in the first area, the cell signal quality including RSRP or including RSRP and RSRQ.

[0340] All related content of each step involved in the method embodiments described above can be cited to the function description of the corresponding functional module, and will not be repeated here.

[0341] In the present application, the communication apparatus 150 can be presented in the form of integrated functional modules. The "module" here can refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0342] In some embodiments, when the communication apparatus 150 in FIG. 15 is a chip or a chip system, the functions / implementation procedures of the transceiver module 1502 can be implemented through an input / output interface (or a communication interface) of the chip or the chip system, and the functions / implementation procedures of the processing module 1501 can be implemented through a processor (or a processing circuit) of the chip or the chip system.

[0343] Since the communication apparatus 150 provided by the embodiment can execute the above method, the technical effects that can be achieved by the communication apparatus 150 can refer to the above method embodiments, which will not be described here again.

[0344] As a possible product form, the terminal or the RAN node or the perception node described in the embodiments of the present application can be implemented using one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuitry, or any combination thereof capable of performing the various functions described throughout the present application.

[0345] As another possible product form, the terminal or the RAN node or the perception node described in the embodiments of the present application can be implemented by a general bus architecture. For ease of illustration, refer to FIG. 16, which is a structural schematic diagram of a communication apparatus 1600 provided by the embodiments of the present application, the communication apparatus 1600 including a processor 1601 and a transceiver 1602. The communication apparatus 1600 can be a terminal, or a chip or a chip system therein; or the communication apparatus 1600 can be a RAN node, or a chip or a module therein. FIG. 16 only shows the main components of the communication apparatus 1600. In addition to the processor 1601 and the transceiver 1602, the communication apparatus can further include a memory 1603, and an input / output device (not shown in the figure).

[0346] Optionally, the processor 1601 is mainly used for processing communication protocols and communication data, and controlling the whole communication apparatus, executing software programs, processing data of the software programs, so as to implement the methods provided in the above method embodiments. The memory 1603 is mainly used for storing software programs and data. The transceiver 1602 can include radio frequency circuitry and an antenna, the radio frequency circuitry is mainly used for conversion between baseband signals and radio frequency signals, and processing of the radio frequency signals. The antenna is mainly used for transceiving radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.

[0347] Optionally, the processor 1601, the transceiver 1602, and the memory 1603 can be connected through a communication bus.

[0348] When the communication device is powered on, the processor 1601 can read the software program in the memory 1603, execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1601 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and transmits the radio frequency signal in the form of electromagnetic wave through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1601. The processor 1601 converts the baseband signal into data and processes the data.

[0349] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor that performs baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0350] In some embodiments, in terms of hardware implementation, those skilled in the art can conceive that the above-mentioned communication device 150 can adopt the form of the communication device 1600 shown in FIG. 16.

[0351] As an example, the functions / implementation processes of the processing module 1501 in FIG. 15 can be realized by the processor 1601 in the communication device 1600 shown in FIG. 16 invoking the computer execution instructions stored in the memory 1603. The functions / implementation processes of the transceiver module 1502 in FIG. 15 can be realized by the transceiver 1602 in the communication device 1600 shown in FIG. 16.

[0352] As another possible product form, the terminal or the RAN node or the perception node in the present application can adopt the constituent structure shown in FIG. 17, or include the components shown in FIG. 17. FIG. 17 is a constituent diagram of a communication device 1700 provided by the present application. The communication device 1700 can be a terminal or a chip or a system on chip in the terminal; or can be a RAN node or a chip or a system on chip in the RAN node; or can be a perception node or a chip or a system on chip in the perception node.

[0353] As shown in FIG. 17, the communication device 1700 includes at least one processor 1701, and at least one communication interface (only one communication interface 1704 is shown in FIG. 17 as an example, and the processor 1701 is taken as an example for description). Optionally, the communication device 1700 can further include a communication bus 1702 and a memory 1703.

[0354] The processor 1701 can be a general-purpose central processing unit (CPU), a general-purpose processor, a network processing unit (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, a PLD, or any combination thereof. The processor 1701 can also be other apparatuses with processing function, such as a circuit, a device, or a software module, without limitation.

[0355] The communication bus 1702 is used to connect different components in the communication apparatus 1700, so that different components can communicate. The communication bus 1702 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is shown in FIG. 17, but it does not mean that there is only one bus or only one type of bus.

[0356] The communication interface 1704 is used to communicate with other devices or communication networks. For example, the communication interface 1704 can be a module, a circuit, a transceiver, or any device capable of communication. Alternatively, the communication interface 1704 can also be an input / output interface in the processor 1701, used to realize the signal input and signal output of the processor.

[0357] The memory 1703 can be a device with a storage function, used to store instructions and / or data. The instructions can be a computer program.

[0358] For example, the memory 1703 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disk storage, optical disk storage (including compact disks, laser disks, optical disks, digital versatile disks, Blu-ray disks, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0359] It should be noted that the memory 1703 can exist independently of the processor 1701, or the memory 1703 can be integrated with the processor 1701. The memory 1703 can be located in the communication device 1700, or can be located outside the communication device 1700, without limitation. The processor 1701 can be configured to execute instructions stored in the memory 1703 to implement methods provided by the embodiments described below.

[0360] Optionally, the processor 1701 and / or the memory 1703 can include an artificial intelligence (AI) module, which is configured to implement AI-related functions. The AI module can be implemented in software, hardware, or a combination of software and hardware. For example, the AI module can include a radio access network intelligent controller (RIC) module. For example, the AI module can be a near-real-time RIC or a non-real-time RIC.

[0361] As an optional implementation, the communication device 1700 can further include an output device 1705 and an input device 1706. The output device 1705 is in communication with the processor 1701 and can display information in various ways. For example, the output device 1705 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 1706 is in communication with the processor 1701 and can receive user input in various ways. For example, the input device 1706 can be a mouse, a keyboard, a touch screen device, a sensor device, etc.

[0362] In some embodiments, in a hardware implementation, those skilled in the art can conceive that the communication device 150 shown in FIG. 15 can take the form of the communication device 1700 shown in FIG. 17.

[0363] As an example, the functions / implementation processes of the processing module 1501 in FIG. 15 can be implemented by the processor 1701 in the communication device 1700 in FIG. 17 invoking computer execution instructions stored in the memory 1703. The functions / implementation processes of the transceiver module 1502 in FIG. 15 can be implemented by the communication interface 1704 in the communication device 1700 in FIG. 17.

[0364] It should be noted that the structure shown in FIG. 17 does not constitute a specific limitation on the terminal or the RAN node. For example, in some embodiments of the present application, the terminal or the RAN node can include more or fewer components than those shown, or combine certain components, or split certain components, or different arrangement of components. The components shown can be implemented in hardware, software, or a combination of software and hardware.

[0365] In some embodiments, the present application also provides a communication apparatus, which comprises a processor configured to implement the method in any of the preceding method embodiments.

[0366] As a possible implementation, the communication apparatus further comprises a memory. The memory is configured to store necessary computer programs and data. The computer programs can include instructions, and the processor can invoke the instructions in the computer programs stored in the memory to instruct the communication apparatus to perform the method in any of the preceding method embodiments. Of course, the memory can also not be in the communication apparatus.

[0367] As another possible implementation, the communication apparatus further comprises an interface circuit, which is a code / data read / write interface circuit, and is configured to receive computer execution instructions (the computer execution instructions are stored in the memory, and can be read directly from the memory or can pass through other devices) and transmit them to the processor.

[0368] As yet another possible implementation, the communication apparatus further comprises a communication interface, which is configured to communicate with modules outside the communication apparatus.

[0369] It can be understood that the communication apparatus can be a chip or a chip system. When the communication apparatus is a chip system, it can be composed of a chip or can include a chip and other discrete devices, and the present application does not make a specific limitation on this.

[0370] The present application also provides a computer readable storage medium, which stores a computer program or instructions, and the computer program or instructions are executed by a computer to realize the functions of any of the preceding method embodiments.

[0371] The present application also provides a computer program product, which is executed by a computer to realize the functions of any of the preceding method embodiments.

[0372] Those skilled in the art can understand that, for the convenience and brevity of the description, the specific working processes of the system, apparatus and unit described above can refer to the corresponding processes in the preceding method embodiments, which will not be described here.

[0373] It can be understood that the system, apparatus and method described in the present application can also be implemented in other manners. For example, the apparatus embodiment described above is merely illustrative. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0374] The units described as separate components can or can not be physically separate, i.e., can be located in one place, or can be distributed on a plurality of network units. The components shown as units can or can not be physical units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0375] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can be physically present separately, or two or more units can be integrated into one unit.

[0376] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or data storage device including one or more servers, data centers, etc. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state drive (SSD)), etc. In the embodiments of the present application, the computer can include the apparatus described above.

[0377] Although the application has been described in connection with various embodiments thereof, it will be understood that other modifications and variations will be apparent to those skilled in the art in view of the foregoing disclosure, the drawings, and the accompanying claims. It is therefore contemplated that the application will be practiced otherwise than as specifically set forth herein. For example, claims can be presented that are broader in scope than the above described embodiments. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense. The disclosure covers any and all modifications, variations, combinations or equivalents that fall within the scope of the present application. It is contemplated that the application will be practiced in the absence of any element of the application not specifically disclosed herein. It is also contemplated that one or more claimed elements can be invoked in the claim even though the one or more claimed elements are not explicitly disclosed in each and every section of this specification. To clearly assuage any doubt, any conceivable combination of claimed elements appears to be within the scope of the present application, provided that the combination results in a more practical, stable, and / or operable result. The use of any and all examples, or exemplary language (e.g., "for example," "for instance," "as an example," "for example only," "e.g." and the like) is intended merely to better illuminate the application and does not pose a limitation on the scope of the application unless otherwise indicated. No language is intended to indicate that the application will not include any such elements or limit the scope of the application to such examples only. Numbering and labels of elements in the figures are also not intended to limit the scope of the application unless otherwise indicated. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the application.

[0378] Although the application has been described in connection with specific embodiments thereof, it will be understood that various modifications and variations will be apparent to those skilled in the art in view of the foregoing disclosure, the drawings, and the accompanying claims. It is therefore contemplated that the application will be practiced otherwise than as specifically set forth herein. For example, claims can be presented that are broader in scope than the above described embodiments. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense. The disclosure covers any and all modifications, variations, combinations or equivalents that fall within the scope of the present application. It is contemplated that the application will be practiced in the absence of any element of the present application not specifically disclosed herein. It is also contemplated that one or more claimed elements can be invoked in the claim even though the one or more claimed elements are not explicitly disclosed in each and every section of this specification. To clearly assuage any doubt, any conceivable combination of claimed elements appears to be within the scope of the present application, provided that the combination results in a more practical, stable, and / or operable result. The use of any and all examples, or exemplary language (e.g., "for example," "for instance," "as an example," "for example only," "e.g." and the like) is

Claims

1. A communication method, characterized in that, The method includes: Receive first radio environment information from a first radio access network (RAN) node. The first radio environment information is information related to radio signal transmission within a first area. The first radio environment information indicates the cell signal quality within the first area. The cell signal quality includes Reference Signal Received Power (RSRP) or includes RSRP and Reference Signal Received Quality (RSRQ). Based on the first wireless environment information, cell selection and / or cell reselection are performed.

2. The method according to claim 1, characterized in that, The step of performing cell selection and / or cell reselection based on the first wireless environment information includes: Based on the first wireless environment information and the terminal's location information, a second wireless environment information is determined. The second wireless environment information indicates the cell signal quality of at least one cell at the first location, where the first location is the location of the terminal. Based on the second wireless environment information, cell selection and / or cell reselection are performed.

3. The method according to claim 2, characterized in that, The second wireless environment information indicates the cell signal quality of at least one first cell at the first location, wherein the at least one first cell is a neighboring cell of the second cell, and the second cell is the cell where the terminal is camped. The step of performing cell selection and / or cell reselection based on the second wireless environment information includes: Cell reselection is performed based on the cell signal quality and offset of the at least one first cell at the first location, wherein the offset is used to negatively offset the cell signal quality of the at least one first cell.

4. The method according to claim 3, characterized in that, The method further includes: Measure the cell signal quality of at least one third cell, wherein the at least one third cell is a neighboring cell of the second cell; The cell reselection based on the cell signal quality and offset of the at least one first cell at the first location includes: Cell reselection is performed based on the cell signal quality of at least one first cell at the first location, the offset, and the cell signal quality of at least one third cell.

5. The method according to claim 3 or 4, characterized in that, The method further includes: receiving first indication information from the first RAN node, the first indication information indicating the offset.

6. The method according to any one of claims 1-5, characterized in that, The first wireless environment information is determined based on the perceived environment information of the first area, which is information related to the physical environment within the first area.

7. The method according to any one of claims 1-6, characterized in that, The method further includes: The system receives a second indication information from the first RAN node, the second indication information indicating that the first wireless environment information is the wireless environment information corresponding to the first area.

8. The method according to any one of claims 1-7, characterized in that, The step of performing cell selection and / or cell reselection based on the first wireless environment information includes: When the terminal is located in the first area, cell selection and / or cell reselection are performed based on the first wireless environment information.

9. The method according to any one of claims 1-8, characterized in that, The method further includes: Receive third indication information from the first RAN node, the third indication information indicating the validity period of the first wireless environment information.

10. The method according to claim 9, characterized in that, The step of performing cell selection and / or cell reselection based on the first wireless environment information includes: Within the valid time of the first wireless environment information, cell selection and / or cell reselection are performed based on the first wireless environment information.

11. The method according to any one of claims 1-10, characterized in that, The first wireless environment information indicates the cell signal quality within the first area, including: The first wireless environment information includes the cell signal quality within the first area; or, The first wireless environment information includes beam-level signal quality within the first area, and the beam-level signal quality is used to determine the cell signal quality within the first area.

12. The method according to claim 11, characterized in that, The first wireless environment information also includes at least one of the following: channel feature value, channel matrix, large-scale fading information, small-scale fading information, multipath information, or interference information.

13. A communication method, characterized in that, The method includes: Obtain first wireless environment information, which is information related to wireless signal transmission in a first area. The first wireless environment information indicates the cell signal quality in the first area. The cell signal quality includes Reference Signal Received Power (RSRP), or includes RSRP and Reference Signal Received Quality (RSRQ). Send the first wireless environment information.

14. The method according to claim 13, characterized in that, The first wireless environment information is determined based on the perceived environment information of the first area, which is information related to the physical environment within the first area.

15. The method according to claim 13 or 14, characterized in that, The acquisition of the first wireless environment information includes: Send a first request message to the sensing node, the first request message being used to request wireless environment information of the first area; Receive the first wireless environment information from the sensing node.

16. The method according to claim 15, characterized in that, The first request information includes information about the first area and at least one of the following: parameters included in the first wireless environment information, the level of the first wireless environment information, and wireless information of at least one radio access network (RAN) node within the first area; The first wireless environment information level includes cell level or beam level; the wireless information of the RAN node includes at least one of the following: antenna position, antenna height, antenna orientation angle, transmission power, or frequency used by the RAN node.

17. The method according to claim 13 or 14, characterized in that, The acquisition of the first wireless environment information includes: Send a second request message to the sensing node, the second request message being used to request sensing environment information of the first area; Receive sensing environment information of the first region from the sensing node, wherein the sensing environment information of the first region is information related to the physical environment within the first region; The first wireless environment information is determined based on the perceived environmental information of the first area.

18. The method according to claim 17, characterized in that, The second request information includes information about the first region and at least one of the following: the accuracy of the perceived environment information, the parameters included in the perceived environment information, or the method of transmitting the perceived environment information; The parameters of the sensing environment indicate at least one of the following: type, material, location, size, shape, speed of movement, dielectric constant, or reflection coefficient of the scatterer in the first region; the transmission method includes event triggering or periodic transmission.

19. The method according to claim 17 or 18, characterized in that, The step of determining the first wireless environment information based on the perceived environment information of the first region includes: The first wireless environment information is determined based on the perceived environment information of the first area and the wireless information of at least one RAN node in the first area. The radio information of the RAN node includes at least one of the following: the antenna location, antenna height, antenna orientation angle, transmission power, or the frequency used by the RAN node.

20. The method according to any one of claims 13-19, characterized in that, The method further includes: sending first indication information, the first indication information indicating an offset, the offset being used to negatively offset the cell signal quality determined based on the first wireless environment information.

21. The method according to any one of claims 13-20, characterized in that, The method further includes: sending a second indication message, wherein the second indication message indicates that the first wireless environment information is the wireless environment information corresponding to the first area.

22. The method according to any one of claims 13-21, characterized in that, The method further includes: sending a third indication message, the third indication message indicating the validity period of the first wireless environment information.

23. The method according to any one of claims 13-22, characterized in that, The first wireless environment information indicates the cell signal quality within the first area, including: The first wireless environment information includes the cell signal quality within the first area; or, The first wireless environment information includes beam-level signal quality within the first area, and the beam-level signal quality is used to determine the cell signal quality within the first area.

24. The method according to claim 23, characterized in that, The first wireless environment information also includes at least one of the following: channel feature value, channel matrix, large-scale fading information, small-scale fading information, multipath information, or interference information.

25. A communication device, characterized in that, The communication device includes a processor; the processor is configured to run a computer program or instructions to cause the communication device to perform the method as described in any one of claims 1-12, or to cause the communication device to perform the method as described in any one of claims 13-24.

26. A computer-readable storage medium, characterized in that, A computer-readable storage medium stores computer instructions or programs that, when executed on a computer, cause the method described in any one of claims 1-12 to be performed, or cause the method described in any one of claims 13-24 to be performed.

27. A computer program product, characterized in that, The computer program product includes computer instructions; when some or all of the computer instructions are run on a computer, they cause the method as described in any one of claims 1-12 to be performed, or cause the method as described in any one of claims 13-24 to be performed.

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