Wireless communication method, communication apparatus, storage medium, and computer program product

Abstract

The present application provides a wireless communication method, a communication apparatus, a storage medium, and a computer program product, which can reduce cell handover counts of terminal devices and reduce terminal device handover latency. The method comprises: sending a CSI report to a network device, wherein the CSI report is a measurement report triggered by a first event, the CSI report comprises one or more of the following information: related information of a first beam set in a current serving cell of a terminal device, beams in the first beam set not comprising a current beam of the terminal device; related information of a second beam set in a candidate cell, the second beam set comprising at least one of a beam satisfying a second event and a beam not satisfying a third event; related information of a third beam set, beams in the third beam set satisfying a leaving condition corresponding to a fourth event; and first information, the first information being used for indicating whether the CSI report has been triggered by a leaving condition corresponding to the first event.

Description

Wireless communication methods, communication devices, storage media, and computer program products

[0001] This application claims priority to Chinese patent application filed on January 26, 2025, with application number 202510125646.0 and entitled "Wireless Communication Method, Communication Device, Storage Medium, Computer Program Product", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more particularly to a wireless communication method, communication device, storage medium, and computer program product. Background Technology

[0003] The terminal device can measure the beam and send a measurement report to the network device. Based on this measurement report, the network device can make a handover decision for the terminal device. For example, the network device can instruct the terminal device to perform a cell handover or instruct the terminal device to handover to a different beam in the serving cell.

[0004] Determining which beam information should be included in the measurement reports sent by terminal devices to network devices in order to minimize the number of cell handovers and reduce handover latency is a pressing issue that needs to be addressed. Summary of the Invention

[0005] This application provides a wireless communication method, communication device, storage medium, and computer program product that can reduce the number of cell handovers for terminal devices and reduce the handover latency of terminal devices.

[0006] In a first aspect, a wireless communication method is provided, executed by a terminal device, comprising: sending a Channel State Information (CSI) report to a network device, the CSI report being a measurement report triggered by a first event, the CSI report including one or more of the following: information related to a first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; information related to a second beam set in a candidate cell, wherein the second beam set includes at least one of beams satisfying a second event and beams not satisfying a third event; information related to a third beam set, wherein the beams in the third beam set satisfy a departure condition corresponding to a fourth event; and first information, the first information being used to indicate whether the CSI report is triggered by a departure condition corresponding to the first event.

[0007] This application embodiment carries more beam-related information in the measurement report (such as non-current beams of the serving cell, beams of candidate cells that have not met the triggering event, beams of candidate cells that have met the triggering event, beams that meet the leave condition, etc.), enabling network devices to obtain more beam-related information. This allows for a more objective evaluation of the performance of each cell, making more reasonable decisions for terminal device handover, avoiding back-and-forth handover between cells, and helping to reduce transmission latency.

[0008] In some implementations, the first beam set includes one or more of the following beams: beams that do not satisfy the fifth event; beams whose measurement results are greater than or equal to a preset threshold; p beams, where the measurement results of the p beams are better than those of the beams in the currently serving cell that are measured, excluding the p beams, where p is a positive integer; and beams whose measurement results are better than those of the current beam.

[0009] If a beam in the serving cell does not meet the trigger event, it indicates that the signal quality of that beam is relatively good. By reporting the relevant information of some beams with good signal quality in the serving cell, beam management within the serving cell can be triggered when the current beam quality is poor. This means the terminal device can be triggered to perform beam handover within the serving cell, thus avoiding cell handover and reducing transmission latency. If the terminal device does not report the relevant information of non-current beams in the serving cell, the network device will usually instruct the terminal device to perform cell handover when the signal quality of the current beam is poor. Therefore, the solution provided in this application can reduce the number of cell handovers performed by the terminal device and reduce transmission latency.

[0010] The first beam set includes beams with good signal quality, such as beams whose measurement results are greater than or equal to a preset threshold, one or more beams with the best measurement results, or beams with measurement results better than the current beam. The reporting of this beam information enables network devices to trigger beam management within the serving cell when the current beam quality is poor, that is, to trigger the terminal device to perform beam switching within the serving cell, thereby avoiding cell switching and reducing transmission latency.

[0011] In some implementations, the beams in the first beam set belong to the candidate beams of the current serving cell or the candidate beams activated by the current serving cell.

[0012] Since the candidate beams or active candidate beams are beams configured by the network device for the terminal device, and these beams have their corresponding beam index information, the terminal device carries relevant information about the candidate beams or active candidate beams in the measurement report. This allows the network device to clearly understand the signal quality of these beams, which is beneficial for the network device to make reasonable switching decisions.

[0013] In some implementations, the relevant information of the first beam set includes second information, which indicates that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell.

[0014] By sending a second message to the network device, the network device can clearly identify some non-candidate beams with better signal quality in the serving cell. This information helps the network device to make a reasonable assessment of the performance of the serving cell and make a reasonable handover decision.

[0015] In some implementations, the relevant information of the third beam set includes third information, which is used to indicate that the beams in the third beam set satisfy the departure condition corresponding to the fourth event.

[0016] In some implementations, the relevant information of at least one of the first beam set, the second beam set, and the third beam set includes one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam.

[0017] In some implementations, the method further includes: receiving first configuration information from the network device, the first configuration information being used to instruct the terminal device whether to send relevant information about the first beam set to the network device. The terminal device can determine whether to report relevant information about the first beam set based on the first configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0018] In some implementations, the first configuration information is used to configure one or more of the following: whether the terminal device is allowed to send second information to the network device, the second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell; whether the terminal device is allowed to send information related to the candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the active candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are greater than or equal to a preset threshold to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell that do not satisfy the fifth event to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are better than the current beam to the network device; whether the terminal device is allowed to send information related to p beams in the current serving cell, the measurement results of the p beams being better than the beams other than the p beams among the measured beams of the current serving cell, where p is a positive integer.

[0019] In some implementations, the first configuration information is further used to configure one or more of the following: a maximum number of beams included in the first beam set; and a minimum number of beams included in the first beam set. Setting the maximum value avoids the terminal device reporting too many serving cell beams, which would cause high signaling overhead. Setting the minimum value allows the network device to have sufficient beam measurement results to more objectively assess whether the serving cell is suitable for the terminal device to continue camping, thus facilitating more reasonable handover decisions.

[0020] In some implementations, the CSI report is carried in the Media Access Control (MAC) control element CE.

[0021] In some implementations, the total number of beams included in the CSI report is greater than the number of beams that the terminal device determines needs to report. If the CSI report includes information about a fourth beam, which is an unmeasured beam, then the MAC CE satisfies one or more of the following: the information about the fourth beam is carried in a first bit in the MAC CE, and the value of the first bit is a special value; the MAC CE includes fourth information, which is used to indicate that the fourth beam is an unmeasured beam.

[0022] If the message carrying the measurement report is in a fixed format (such as MAC CE), the design complexity of the message can be reduced by setting the number of beams carried in the measurement report to a fixed value.

[0023] In some implementations, if the total number of beams included in the CSI report is less than the number of beams measured, the measurement results of the beams in the second beam set are superior to those of the beams in the candidate cell other than those in the second beam set.

[0024] Terminal devices can select some beams with better signal quality to report, so that network devices can determine the performance of candidate cells (such as whether they are suitable for terminal devices to camp) based on the relevant information of these beams, thereby making reasonable handover decisions and reducing the transmission latency of terminal devices.

[0025] In some implementations, the number of beams in the second beam set that do not satisfy the third event is greater than or equal to a first threshold, where the first threshold is the minimum number of beams that do not satisfy the third event. By setting the first threshold, the network device has sufficient information on the beam measurement results of candidate cells to more objectively determine which candidate cell the terminal device is more suitable to hand over to, which helps the network device make a more reasonable handover decision.

[0026] In some implementations, the number of beams included in the second beam set is less than or equal to a second threshold, which is the maximum number of beams that do not meet the third event. By setting a second threshold, it is possible to avoid the terminal device reporting too many candidate cell beams, which would cause high signaling overhead.

[0027] In some implementations, the method further includes: receiving second configuration information from the network device, the second configuration information being used to configure one or more of the following: whether the terminal device is allowed to send information related to beams that satisfy the second event; whether the terminal device is allowed to send information related to beams that do not satisfy the third event; a first threshold, the first threshold being the minimum number of beams that do not satisfy the third event; and a second threshold, the second threshold being the maximum number of beams that do not satisfy the third event. The terminal device can determine which beams' information to report based on the second configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0028] In some implementations, the first information is the type of the message carrying the CSI report. Indicating that the CSI report was triggered by a departure condition by using the type of the message carrying the CSI report eliminates the need to include indication information in the CSI report, thus reducing signaling overhead.

[0029] In some implementations, the first information is carried in a reserved bit in the CSI report, or the first information is carried in the bit occupied by the reporting configuration identifier in the CSI report.

[0030] In some implementations, the method further includes: receiving third configuration information from the network device, the third configuration information being used to configure a third threshold, wherein the total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is less than or equal to the third threshold.

[0031] In a second aspect, a wireless communication method is provided, executed by a network device, comprising: receiving a Channel State Information (CSI) report from a terminal device, the CSI report being a measurement report triggered by a first event, the CSI report including one or more of the following: information related to a first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; information related to a second beam set in a candidate cell, the second beam set including at least one of beams satisfying a second event and beams not satisfying a third event; information related to a third beam set, wherein the beams in the third beam set satisfy a departure condition corresponding to a fourth event; and first information, the first information being used to indicate whether the CSI report is triggered by a departure condition corresponding to the first event.

[0032] In some implementations, the first beam set includes one or more of the following beams: beams that do not satisfy the fifth event; beams whose measurement results are greater than or equal to a preset threshold; p beams, where the measurement results of the p beams are better than those of the beams in the currently serving cell that are measured, excluding the p beams, where p is a positive integer; and beams whose measurement results are better than those of the current beam.

[0033] In some implementations, the beams in the first beam set belong to the candidate beams of the current serving cell or the candidate beams activated by the current serving cell.

[0034] In some implementations, the relevant information of the first beam set includes second information, which indicates that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell.

[0035] In some implementations, the relevant information of the third beam set includes third information, which is used to indicate that the beams in the third beam set satisfy the departure condition corresponding to the fourth event.

[0036] In some implementations, the relevant information of at least one of the first beam set, the second beam set, and the third beam set includes one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam.

[0037] In some implementations, the method further includes sending first configuration information to a terminal device, wherein the first configuration information is used to instruct the terminal device whether to send relevant information about the first beam set to the network device. The terminal device can determine whether to report relevant information about the first beam set based on the first configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0038] In some implementations, the first configuration information is used to configure one or more of the following: whether the terminal device is allowed to send second information to the network device, the second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell; whether the terminal device is allowed to send information related to the candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the active candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are greater than or equal to a preset threshold to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell that do not satisfy the fifth event to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are better than the current beam to the network device; whether the terminal device is allowed to send information related to p beams in the current serving cell, the measurement results of the p beams being better than the beams other than the p beams among the measured beams of the current serving cell, where p is a positive integer.

[0039] In some implementations, the first configuration information is further used to configure one or more of the following: the maximum number of beams included in the first beam set; the minimum number of beams included in the first beam set.

[0040] In some implementations, the CSI report is carried in the Media Access Control (MAC) control element CE.

[0041] In some implementations, the total number of beams included in the CSI report is greater than the number of beams that the terminal device determines needs to report. If the CSI report includes information about a fourth beam, which is an unmeasured beam, then the MAC CE satisfies one or more of the following: the information about the fourth beam is carried in a first bit in the MAC CE, and the value of the first bit is a special value; the MAC CE includes fourth information, which is used to indicate that the fourth beam is an unmeasured beam.

[0042] In some implementations, if the total number of beams included in the CSI report is less than the number of beams measured, the measurement results of the beams in the second beam set are superior to those of the beams in the candidate cell other than those in the second beam set.

[0043] In some implementations, the number of beams in the second beam set that do not satisfy the third event is greater than or equal to a first threshold, which is the minimum number of beams that do not satisfy the third event.

[0044] In some implementations, the number of beams included in the second beam set is less than or equal to a second threshold, which is the maximum number of beams that did not meet the third event.

[0045] In some implementations, the method further includes: sending second configuration information to a terminal device, the second configuration information being used to configure one or more of the following: whether the terminal device is allowed to send information related to beams that satisfy the second event; whether the terminal device is allowed to send information related to beams that do not satisfy the third event; a first threshold, the first threshold being the minimum number of beams that do not satisfy the third event; and a second threshold, the second threshold being the maximum number of beams that do not satisfy the third event. The terminal device can determine which beam information to report based on the second configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0046] In some implementations, the first information is the type of the message carrying the CSI report. Indicating that the CSI report was triggered by a departure condition by using the type of the message carrying the CSI report eliminates the need to include indication information in the CSI report, thus reducing signaling overhead.

[0047] In some implementations, the first information is carried in a reserved bit in the CSI report, or the first information is carried in the bit occupied by the reporting configuration identifier in the CSI report.

[0048] In some implementations, the method further includes: sending third configuration information to a terminal device, the third configuration information being used to configure a third threshold, wherein the total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is less than or equal to the third threshold.

[0049] Thirdly, a communication device is provided, comprising a unit (or module) composed of software and / or hardware, the unit being used to perform any one of the methods described in the first aspect.

[0050] Fourthly, a communication device is provided, comprising a unit (or module) composed of software and / or hardware, the unit being used to perform any one of the methods described in the second aspect.

[0051] Fifthly, a chip is provided, including a processor; the processor is configured to read and execute a computer program stored in a memory to perform any of the methods described in the first aspect.

[0052] Optionally, the chip also includes a memory, which is connected to the processor via a circuit or wire.

[0053] Alternatively, the chip may further include a communication interface.

[0054] In a sixth aspect, a chip is provided, including a processor; the processor is configured to read and execute a computer program stored in a memory to perform any of the methods described in the second aspect.

[0055] Optionally, the chip further includes a memory, which is connected to the processor via a circuit or wire.

[0056] Alternatively, the chip may further include a communication interface.

[0057] In a seventh aspect, a terminal device is provided, the terminal device comprising: a processor, a memory, and an interface; the processor, the memory, and the interface cooperate with each other to enable the terminal device to execute any one of the technical solutions described in the first aspect; or to include any one of the chips described in the fifth aspect.

[0058] Eighthly, a network device is provided, the network device comprising: a processor, a memory, and an interface; the processor, memory, and interface cooperate with each other to enable the network device to execute any one of the technical solutions described in the second aspect; or to include any one of the chips described in the sixth aspect.

[0059] Ninthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when the computer program is executed by a processor, the processor performs any one of the methods described in the first or second aspect.

[0060] In a tenth aspect, a computer program product is provided, the computer program product comprising: computer program code, which, when executed on a communication device, causes the communication device to perform any one of the methods described in the first or second aspect. Attached Figure Description

[0061] Figure 1 shows the architecture of a communication system applicable to embodiments of this application;

[0062] Figure 2 is a schematic diagram of the method for determining the satisfying event and the leaving event provided in the embodiments of this application;

[0063] Figure 3 is a flowchart illustrating a wireless communication method provided in an embodiment of this application;

[0064] Figure 4 is a schematic diagram of the structure of a measurement report provided in an embodiment of this application;

[0065] Figure 5 is a schematic block diagram of a communication device provided in an embodiment of this application;

[0066] Figure 6 is a schematic block diagram of another communication device provided in an embodiment of this application;

[0067] Figure 7 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0068] Figure 1 is a schematic diagram of the architecture of the communication system 10 used in the embodiments of this application. As shown in Figure 1, the communication system includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal device (120a-120j in Figure 1, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal device 120 is wirelessly connected to the RAN node 110. Terminal devices and RAN nodes can be interconnected via wired or wireless means. The communication system 10 may also include a core network 200. The RAN node 110 is connected to the core network 200 wirelessly or via wired means. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or they may be the same physical device integrating the logical functions of the core network device and the logical functions of the RAN node. Communication system 10 may also include Internet 300.

[0069] RAN 100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. RAN 100 can also include two or more of the above-mentioned different radio access systems.

[0070] RAN nodes, also known as radio access network equipment, RAN entities, or access nodes, are used to help terminal devices access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation base station in a 6G mobile communication system, or a base station in a future mobile communication system. RAN nodes can be macro base stations (as shown in Figure 1, 110a), micro base stations or indoor stations (as shown in Figure 1, 110b), relay nodes, or donor nodes.

[0071] In another application scenario, multiple RAN nodes can collaborate to help terminal devices achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0072] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0073] A terminal device is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminal devices can also be referred to as terminals, user equipment (UE), mobile stations, mobile terminals, etc. They can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminal devices.

[0074] Base stations and terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminal equipment.

[0075] The roles of base stations and terminal devices can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminal devices 120j that access the wireless access network 100 through 120i, 120i is a base station; however, for base station 110a, 120i is a terminal device. That is, 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminal devices can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.

[0076] Communication between base stations and terminal devices, between base stations, and between terminal devices can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0077] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal device can be executed by modules (such as chips or modems) within the terminal device, or by a device that includes terminal device functions.

[0078] Mobility management ensures that communication links between network devices and terminal devices are not interrupted due to the movement of terminal devices. Depending on the terminal device's state, mobility management can include RRC idle-state mobility management and RRC connected-state mobility management. In RRC idle state, mobility management mainly includes cell selection and cell reselection. In RRC connected state, mobility management mainly includes cell handover. Whether it's cell selection, cell reselection, or cell handover, it's all based on measurement results. Therefore, measurement is the foundation of mobility management.

[0079] Measurements can include measurements of the serving cell and measurements of candidate cells. Depending on the layer involved, current measurements can include layer 3 (L3) measurements and L1 measurements. L3 measurements are cell-level measurements, meaning one cell corresponds to one measurement result; L1 measurements are beam-level measurements, meaning one beam corresponds to one measurement result, and one cell can correspond to multiple measurement results. L3 measurements will be introduced first below.

[0080] The terminal device can perform measurements on the serving cell and / or candidate cells, and report the signal measurement results of the serving cell and / or candidate cells to the network device. The signal measurement results may include one or more of the following: reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and signal to interference plus noise ratio (SINR). Based on the signal measurement results, the network device can determine a handover strategy for the terminal device. For example, the network device can instruct the terminal device to handover to the cell with the better measurement results.

[0081] L3 measurement reporting can be either periodic or event-triggered. For periodic reporting, the terminal device can send an L3 measurement report to the network device according to the corresponding cycle. For event-triggered reporting, the terminal device can send an L3 measurement report to the network device when a triggering event is met.

[0082] The triggering event can include one or more of events A1 to A5.

[0083] Event A1 includes a measurement result of the serving cell exceeding a preset threshold. If the terminal device meets Event A1, it indicates that the signal quality of the serving cell is relatively good.

[0084] Event A2 includes a measurement result for the serving cell that is less than a preset threshold. If the terminal device meets Event A2, it indicates that the signal quality of the serving cell is relatively poor.

[0085] Event A3 includes situations where the measurement result of the candidate cell is higher than the measurement result of the current serving cell where the terminal device is located, and the difference between the measurement result of the candidate cell and the measurement result of the current serving cell is greater than or equal to a preset threshold. If the terminal device meets Event A3, it means that the signal quality of the candidate cell is better than the signal quality of the serving cell.

[0086] Event A4 includes a candidate cell measurement result that is greater than or equal to a preset threshold. If the terminal device meets Event A4, it indicates that the candidate cell has relatively good signal quality.

[0087] Event A5 includes situations where the measurement result of the current serving cell where the terminal device is located is lower than threshold 1, and the measurement result of the candidate cell is higher than threshold 2. If the terminal device meets event A5, it means that the signal quality of the candidate cell is relatively good, while the signal quality of the serving cell is relatively poor.

[0088] It should be noted that the threshold values ​​may vary for different events.

[0089] Network devices can send event trigger configurations to terminal devices. Each cell can correspond to one event trigger configuration, which can include the type of trigger event and its corresponding parameters. Different cells can have the same or different trigger events. One possible format for an event trigger configuration is as follows.

[0090] The aforementioned parameters may include one or more of the following: threshold, report-on-leave indication, time-to-trigger (TTT), cell list, etc. The threshold can be an absolute threshold or a relative offset; multiple thresholds can be configured for a single event.

[0091] For L3 measurements, the criteria for determining whether an event is satisfied are as follows: if the measurement results of a candidate cell or serving cell meet the entry conditions corresponding to the event, and these entry conditions are consistently met within a certain time period (TTT), then the candidate cell or serving cell is considered to have satisfied the event. Specifically, this can be achieved by adding the candidate cell or serving cell to the trigger list, triggering measurement reporting, and adding the relevant information of the candidate cell or serving cell to the measurement report during the measurement reporting process.

[0092] The criteria for determining a leave event are as follows: if the measurement results of a candidate cell or serving cell meet the leave conditions corresponding to the event, and these leave conditions are met continuously for a certain time period (TTT), then the candidate cell or serving cell is considered to have left the event. Specifically, determining that a candidate cell or serving cell has left the event can involve removing the candidate cell or serving cell from the trigger list, triggering measurement reporting, and reporting relevant information about cells in the trigger list during the measurement reporting process.

[0093] The terminal device can send a measurement report to the network device when an event is met. If reportOnLeave is true, the terminal device can send a measurement report to the network device when an event has passed.

[0094] For event A1, the entry condition is: Ms - Hys > Thresh, and the exit condition is: Ms + Hys < Thresh. Here, Ms represents the measurement result of the serving cell, Hys represents the measurement hysteresis parameter, and Thresh represents the threshold value.

[0095] For event A2, the entry condition is: Ms + Hys < Thresh, and the exit condition is: Ms - Hys > Thresh. Here, Ms represents the measurement result of the serving cell, Hys represents the measurement hysteresis parameter, and Thresh represents the threshold value.

[0096] For event A3, the entry condition is: Mn + Ofn + Ocn - Hys > Mp + Ofp + Ocp + Off, and the exit condition is: Mn + Ofn + Ocn + Hys < Mp + Ofp + Ocp + Off. Here, Mn represents the measurement result of the candidate cell, Mp represents the measurement result of the serving cell, Ofn and Ocn represent the offset values ​​configured in the candidate cell parameter (offsetMO), Ofp and Ocp represent the offset values ​​configured in the serving cell parameter (cellIndividualOffset), Hys represents the measurement hysteresis parameter, and Off is the offset value configured for event A3 (a3 - Offset).

[0097] For event A4, the entry condition is: Mn + Ofn + Ocn - Hys > Thresh, and the exit condition is: Mn + Ofn + Ocn + Hys < Thresh. Here, Mn represents the measurement result of the candidate cell, Ofn and Ocn represent the offset values ​​configured in the candidate cell parameter (offsetMO), Hys represents the measurement hysteresis parameter, and Thresh represents the threshold value.

[0098] For event A5, the entry conditions include entry condition 1 and entry condition 2. Entry condition 1 is: Mp + Hys < Thresh1, and entry condition 2 is: Mn + Ofn + Ocn - Hys > Thresh2. The exit conditions include exit condition 1 and exit condition 2. Exit condition 1 is: Mp - Hys > Thresh1, and exit condition 2 is: Mn + Ofn + Ocn + Hys < Thresh2. Here, Mp represents the measurement result of the serving cell, Mn represents the measurement result of the candidate cell, Hys represents the measurement hysteresis parameter, Ofn and Ocn represent the offset values ​​configured in the candidate cell parameter (offsetMO), and Thresh1 and Thresh2 represent the threshold values.

[0099] The following section, using Figure 2 as an example, introduces the methods for determining whether an event satisfies or leaves an event.

[0100] Referring to Figure 2, point a indicates that the entry condition for event A1 is met. If the entry condition is still met at point b after TTT, it means that the serving cell meets event A1, and the terminal device sends a measurement report to the network device. Point c indicates that the departure condition for event A1 is met. If reportOnLeave is true, and the departure condition is still met at point d after TTT, the terminal device can send a measurement report to the network device.

[0101] In some implementations, Hys can be an integer between 0 and 30, and Hys can be configured by the network device via an RRC connection reconfiguration message. Alternatively, the aforementioned threshold value can also be configured by the network device via an RRC connection reconfiguration message. The threshold value may differ for different events.

[0102] By setting the Hys parameter, compared to the scheme that immediately reports measurement results upon meeting the entry conditions, frequent reporting by terminal devices can be avoided, thereby preventing frequent cell handovers by terminal devices, also known as the "ping-pong effect".

[0103] The following describes the L1 measurement reporting. The terminal device can measure the beams of the serving cell and the candidate cells, and report the measurement results of the beams of at least one of the serving cell and the candidate cells to the network device.

[0104] L1 measurement reporting can be configured as aperiodic, periodic, or semi-persistent. Aperiodic measurement reports can be carried in the physical uplink shared channel (PUSCH); periodic measurement reports can be carried in the physical uplink control channel (PUCCH); and semi-persistent measurement reports can be carried in the PUCCH or in a PUSCH activated by downlink control information (DCI). L1 measurement reports can also be channel state information (CSI) reports.

[0105] L1 measurement reporting can be performed using a medium access control element (MAC CE), meaning the measurement report is carried within the MAC CE. The measurement report can include beam information, beam measurement results, and trigger event information. Beam information can include beam index information, which can be an SSB resource indicator (SSBRI) or a CSI-RS resource indicator (CRI) unique across multiple candidate cells; alternatively, the beam index information can include the cell index and the beam's index within that cell (synchronization signal / physical broadcast channel block (SSB) identifier or channel-state-information reference signal (CSI-RS) identifier). Beam measurement results can represent beam quality, and can include one or more of the following: RSRP, RSRQ, and SINR. Trigger event information indicates which event triggered the beam; the trigger event can be a ReportConfigID.

[0106] The triggering events for L1 can include L1 / L2 triggered mobility (LTM) events 2 (Event LTM2), 3 (Event LTM3), 4 (Event LTM4), and 5 (Event LTM5). These four events are described below.

[0107] LTM event 2 includes a measurement result of the serving cell beam being less than a preset threshold.

[0108] LTM event 3 includes a candidate cell beam measurement result that is higher than the serving cell beam measurement result, and the difference between the candidate cell beam measurement result and the serving cell beam measurement result is greater than or equal to a preset threshold.

[0109] LTM event 4 includes a candidate cell whose beam measurement result is greater than or equal to a preset threshold.

[0110] LTM event 5 includes a candidate cell beam measurement result higher than a preset threshold and a serving cell beam measurement result lower than a preset threshold.

[0111] It should be noted that the preset threshold values ​​may differ in different LTM events.

[0112] Each beam can correspond to a reporting configuration, which can be identified by ReportConfigID. The reporting configuration can be sent from the network device to the terminal device. The reporting configuration corresponds to the L3 event triggering configuration. This reporting configuration can include the type of triggering event and its corresponding parameters. The triggering event can be any one or more of LTM events 2 to LTM events 5 mentioned above, and the corresponding parameters can include threshold information, a beam list of candidate cells, etc.

[0113] The triggering events corresponding to different beams may be the same or different, and this application does not specifically limit this.

[0114] Similar to L3 measurements, the criteria for determining an event are as follows: if the measurement results of the serving cell's beam and / or the candidate cell's beam meet the entry conditions corresponding to the event, and these entry conditions are met continuously for a certain time period (TTT), then the serving cell's beam and / or the candidate cell's beam is considered to have triggered the event. The criteria for determining a departure event are as follows: if the measurement results of the candidate cell's beam / serving cell's beam meet the departure conditions corresponding to the event, and these departure conditions are met continuously for a certain time period (TTT), then the candidate cell / serving cell is considered to have left the event.

[0115] The terminal device can send a measurement report to the network device when an event is met. If reportOnLeave is true, the terminal device can send a measurement report to the network device when an event has passed.

[0116] The entry and exit conditions for LTM event 2 can be referenced from those for event A2; the entry and exit conditions for LTM event 3 can be referenced from those for event A3; the entry and exit conditions for LTM event 4 can be referenced from those for event A4; and the entry and exit conditions for LTM event 5 can be referenced from those for event A5. The difference between the entry and exit conditions for LMT and L3 events is that the measurement results in LTM are beam measurements, while the measurement results in L3 are cell measurements.

[0117] Taking LTM event 2 as an example, if the current beam of the serving cell meets the entry condition and continues to meet the entry condition throughout the TTT (Time To Live), then the current beam of the serving cell is considered to satisfy LTM event 2. Here, the current beam of the serving cell is the trigger beam. If LTM event 2 is satisfied, the terminal device can report the relevant information of the current beam of the serving cell to the network device. If the current beam of the serving cell meets the departure condition and continues to meet the departure condition throughout the TTT, then the current beam of the serving cell is considered to have left LTM event 2. If the current beam leaves LTM event 2, the terminal device can report the relevant information of the current beam to the network device.

[0118] Taking LTM event 3 as an example, if the beam of the candidate cell and the current beam of the serving cell meet the entry conditions, and continue to meet the entry conditions throughout the TTT (Time To Time), then the beam of the candidate cell and the current beam of the serving cell are considered to satisfy LTM event 3. Here, the beam of the candidate cell is the trigger beam. If LTM event 3 is satisfied, the terminal device can report relevant information about the beam of the candidate cell and / or the current beam of the serving cell to the network device. If multiple beams in the candidate cell satisfy LTM event 3, the terminal device can report relevant information about these multiple beams to the network device.

[0119] If the beam of the candidate cell and the current beam of the serving cell meet the leave condition, and the leave condition is met throughout the TTT, then the beam of the candidate cell and the current beam of the serving cell are considered to have left LTM event 3. The terminal device can report the relevant information of the beam of the candidate cell and / or the relevant information of the current beam of the serving cell to the network device. If multiple beams in the candidate cell leave LTM event 3, the terminal device can report the relevant information of these multiple beams to the network device.

[0120] Taking LTM event 4 as an example, if the beam of a candidate cell meets the entry conditions and continues to meet the entry conditions throughout the TTT (Time To Live), then the beam of the candidate cell is considered to satisfy LTM event 4. Here, the beam of the candidate cell is the trigger beam. If LTM event 4 is satisfied, the terminal device can report the relevant information of the candidate cell's beam to the network device. If multiple beams in a candidate cell satisfy LTM event 4, the terminal device can report the relevant information of these multiple beams to the network device.

[0121] If a candidate cell's beam meets the leave condition and continues to meet the leave condition throughout the TTT (Time To Time), then the candidate cell's beam is considered to have left LTM event 4, and the terminal device can report the relevant information of the candidate cell's beam to the network device. If multiple beams in a candidate cell leave LTM event 4, then the terminal device can report the relevant information of those multiple beams to the network device.

[0122] Taking LTM event 5 as an example, if the beam of the candidate cell and the current beam of the serving cell meet the entry conditions, and continue to meet the entry conditions throughout the TTT (Time To Time), then the beam of the candidate cell and the current beam of the serving cell are considered to meet LTM event 5. Here, the beam of the candidate cell is the trigger beam. If LTM event 5 is met, the terminal device can report relevant information about the beam of the candidate cell and / or the current beam of the serving cell to the network device. If multiple beams in the candidate cell meet LTM event 5, the terminal device can report relevant information about these multiple beams to the network device.

[0123] If the beam of the candidate cell and the current beam of the serving cell meet the leave condition, and the leave condition is met throughout the TTT, then the beam of the candidate cell and the current beam of the serving cell are considered to have left LTM event 5. The terminal device can report the relevant information of the candidate cell's beam and / or the relevant information of the serving cell's current beam to the network device. If multiple beams in the candidate cell leave LTM event 5, the terminal device can report the relevant information of these multiple beams to the network device.

[0124] The current beam of the serving cell can refer to the beam used for communication that the network device indicates to the terminal device. The current beam can be, for example, the serving beam.

[0125] Network devices can send resource configurations to terminal devices, which are used to configure measurement resources. These resource configurations can be CSI resource configurations. They can also be used to configure parameters of the reference signal used to calculate measurement results. The reference signal can be, for example, SSB, CSI-RS, etc. The terminal device can then measure the reference signal on the beam to determine the measurement results for that beam.

[0126] Measurement resources can be associated with cells. Different measurement resources can be associated with the same or different cells. For example, a network device configures measurement resources 1 to 50 for a terminal device. Measurement resources 1 to 20 are associated with cell 1, measurement resources 21 to 40 are associated with cell 2, and measurement resources 41 to 50 are associated with cell 3. Specifically, the configuration can include a resource list and a candidate cell list. The candidate cell list is associated with reference signals in the resource list. The resource list and the candidate cell list have the same length. The first row of the candidate cell list corresponds to the first row of the resource list. That is, cell index 1 in the first row of the candidate cell list corresponds to SSB index 1 in the first row of the resource list, indicating that SSB index 1 comes from candidate cell 1.

[0127] Network devices can also configure one or more reporting configurations for terminal devices, each reporting configuration being associated with a set of measurement resources. Each reporting configuration may include a reporting ID, reporting resource information, and reporting method information. The reporting resource information indicates the reporting resource, and the reporting method information indicates whether the reporting method is periodic, non-periodic, or semi-continuous reporting. For example, if measurement resource set 1 corresponds to reporting configuration 1, then the terminal device can report the measurement results of measurement resource set 1 on the reporting resource corresponding to reporting configuration 1.

[0128] L1 measurement reporting is typically used to detect serving cells, meaning the measurement report includes the measurement results of the current beam of the serving cell. R17 introduced the ICBM mechanism, which allows the measurement reports of serving cells to carry the measurement results of other cells, such as L1 measurement results of other cells within the same distributed unit (DU) (e.g., additional physical cell identifiers (PCI)).

[0129] In the LTM discussion of R18, the measurement reporting of L1 is extended to cells within the same centralized unit (CU) that operate on the same frequency or different frequencies. For example, the measurement report can carry the measurement results of L cells, each with M SSBs, meaning the measurement report can include the measurement results of L*M SSBs. Here, L and M are both integers greater than or equal to 1.

[0130] Table 1 shows a measurement report format that includes measurement results for L*M beams.

[0131] Table 1 provides an example using a beam index of SSBRI and a measurement result of RSRP.

[0132] Table 1

[0133] L represents the number of cells, determined by the parameter "noOfReportedCell" provided by the higher-level engineer. M represents the number of SSBRI / RSRP pairs reported by each cell, determined by the parameter "nrofReportedRSPerCell" provided by the higher-level engineer.

[0134] The L cells and M beams for each cell can be indicated by the network device; these L*M beams can also be called candidate beams. For example, a serving cell may include M candidate beams, and a candidate cell may also include M candidate beams.

[0135] Currently, the agreement is discussing the use of MAC CE to carry measurement reports, and which beam information is carried in the MAC CE is an issue that is currently under discussion.

[0136] R18 only specifies that measurement results from cells within the same CU can be carried, without considering measurement results from cells across CUs. The main reason is that cell handover across CUs would result in higher transmission latency.

[0137] Although LTM uses beam-level handover, avoiding inter-cell ping-pong remains a crucial consideration, as handovers across cells or CUs can introduce significant latency. Therefore, determining which beam information to include in the measurement report to reduce transmission latency is a pressing issue.

[0138] Based on this, embodiments of this application provide a wireless communication method and apparatus. By carrying more beam-related information in the measurement report (such as non-current beams of the serving cell, beams of candidate cells that have not met trigger events, beams of candidate cells that have met trigger events, beams that meet leave conditions, etc.), network devices can obtain more beam-related information, thereby enabling a more objective evaluation of the performance of each cell, making more reasonable decisions for the handover of terminal devices, avoiding the back-and-forth handover of terminal devices between cells, and helping to reduce transmission latency.

[0139] The wireless communication method provided in the embodiments of this application will be described in detail below with reference to Figure 3.

[0140] Figure 3 illustrates the method from the perspective of device interaction. The specific forms and numbers of the devices shown are merely examples and should not be construed as limiting the implementation of the method provided in this application. The communication method of this application embodiment will be described in detail below, using network devices and terminal devices as the implementing entities.

[0141] It should be understood that the terminal device in the embodiments of this application can be the terminal device itself, or a chip, chip system, or processor that supports the terminal device in implementing communication methods, or a logic module or software that can implement all or part of the terminal device. The network device in the embodiments of this application can be the network device itself, or a chip, chip system, or processor that supports the network device in implementing communication methods, or a logic module or software that can implement all or part of the network device.

[0142] Referring to Figure 3, in step S310, the terminal device sends a CSI report to the network device. This CSI report can be replaced by a measurement report or a beam measurement report, etc. In some implementations, the CSI report can be carried in the MAC CE. In some implementations, the CSI report can be an L1-based CSI report. The CSI report can be a beam-level CSI report.

[0143] In this embodiment, the CSI report can be triggered by a first event. This first event can be one or more of the LTM events 2 to 5 described above. The event corresponding to each beam can be configured individually; the events corresponding to different beams can be the same or different. For example, the event corresponding to the current beam of the serving cell is LTM event 2, the event corresponding to beam 1 of the candidate cell is LTM event 4, and the event corresponding to beam 2 of the candidate cell is LTM event 3.

[0144] CSI reporting triggered by a first event can include: triggering a CSI report when the first event is met; or triggering a CSI report when the first event has ended. In some implementations, the terminal device can send a CSI report to the network device as long as one beam meets the first event. In other implementations, the terminal device can send a CSI report to the network device as long as one beam ends the first event.

[0145] Meeting the first event includes: the beam measurement result meets the entry condition corresponding to the first event, and the entry condition is met continuously for a preset time. Leaving the first event includes: the beam measurement result meets the departure condition corresponding to the first event, and the departure condition is met continuously for a preset time. Leaving the first event requires that the beam was previously in a state that met the first event. The beam changes from meeting the first event to not meeting the first event. This preset time can be indicated by the network device. This preset time can be TTT as mentioned above.

[0146] It should be noted that each event can correspond to an entry condition and an exit condition. Different events can have different entry conditions, and different events can have different exit conditions. The exit condition can also be called the exit condition.

[0147] In some implementations, the network device can send a reporting configuration to the terminal device. This reporting configuration may include parameter information related to the triggering event. For example, this parameter information may include one or more of the following: threshold information, preset duration information (such as TTT). This reporting configuration can be represented by ReportConfigID. The network device can determine the triggering event based on ReportConfigID. The reporting configuration also includes an index of the reporting configuration and resource configurations related to the triggering event. The resource configurations include resource indexes and a resource set of at least one reference signal (SSB or CSI RS). The resource set includes a candidate index list and a reference signal resource list. The candidate indexes are indexes related to candidate cells, specifically PCI, candidate configuration indexes, etc. The reference signal resource list is a list of reference signal indexes, which indicate the reference signals included in the candidate configuration. The terminal performs measurements based on at least one resource related to the triggering event to obtain measurement results for at least one beam, and uses these measurement results to determine whether the triggering event is satisfied.

[0148] The beam-related information described below may include one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam. The beam index information may be SSBRI or CRI, or it may include the cell index and the beam's index within that cell. The beam measurement results may include one or more of the following: RSRP, RSRQ, and SINR. Beam measurement results can also be referred to as beam quality. The reporting configuration information can be used to indicate the corresponding triggering event. The reporting configuration information may be a reporting configuration identifier, such as ReportConfigID.

[0149] In some implementations, beam-related information can be replaced with SSB-related information or CSI-RS-related information, beam measurement results can be replaced with SSB-measurement results or CSI-RS-measurement results, beam index information can be replaced with SSBRI or CRI, and beam-corresponding reporting configuration information can be replaced with SSBRI-corresponding reporting configuration information or CRI-corresponding reporting configuration information.

[0150] In some implementations, the measurement result is the absolute value of the beam quality or a relative value with respect to a certain beam quality, and the reported value can be the actual value or the mapped value. For example, if the beam quality is less than the threshold 1, the reported mapped value is 0.

[0151] Table 2 shows one way to represent the measurement results. In Table 2, the terminal equipment reports based on the absolute value of the beam quality.

[0152] Table 2

[0153] The first column of Table 2 represents the mapping value, the second column represents the measurement result of L3 (or the beam quality of L3), and the third column represents the measurement result of L1 (or the beam quality of L1). The terminal device can send the actual measurement result of the beam to the network device, or it can look up the mapping value corresponding to the actual measurement result according to Table 2 and send the mapping value to the network device.

[0154] For example, if the RSRP of beam 1 is -137dBm, the terminal device can directly send the actual measurement result of beam 1 -137dBm to the network device, or it can send the mapped value RSRP_18 to the network device.

[0155] Table 3 shows another way to represent the measurement results. In Table 3, the terminal devices report based on the relative values ​​of the measurement results.

[0156] Table 3

[0157] The first column of Table 3 represents the mapped values, and the second column represents the difference (or relative value) between the measurement results. This difference is the difference between the RSRP of the current beam and the best RSRP. The terminal device can send the difference of the measurement results to the network device, or it can look up the corresponding mapped value according to Table 3 and send the mapped value to the network device.

[0158] For example, if the RSRP difference of beam 1 is -3dB, the terminal device can directly send the actual difference -3dB to the network device, or it can send the mapped value RSRP difference_1 to the network device.

[0159] In some implementations, the CSI report may include information about the first beam set in the current serving cell. The first beam set may include one or more beams. The information about the first beam set can also be understood as beam-related information. For ease of description, the current serving cell of the terminal device will be referred to as the serving cell below.

[0160] The beams in the first beam set do not include the terminal device's current beam. The terminal device's current beam can be the serving cell's current beam. The current beam can be the beam currently used by the serving cell to communicate with the network device, or the beam indicated by the network device via DCI. The current beam can be one of the active candidate beams. The current beam can also be replaced by the serving beam or the currently serving beam.

[0161] The first beam set may include any one or more beams other than the current beam. For example, the beams in the first beam set may be candidate beams. Alternatively, the beams in the first beam set may be active candidate beams. Another example is that some beams in the first beam set are candidate beams, while others are non-candidate beams. Yet another example is that some beams in the first beam set are active candidate beams, while others are not.

[0162] Candidate beams can be beams that can be reported by the network device. For example, candidate beams can be L cells, each with M beams, as indicated by the network device above. The network device can configure the candidate configuration via RRC. In the LTM candidate configuration, the LTM-Candidate related to each candidate cell provides the reference signal configuration (SSB-config or CSI-RS-config), and the quality of the candidate beams is obtained based on the reference signal measurements in the reference configuration.

[0163] In some embodiments, beam indication can be performed within a unified Transmission Configuration Indication (TCI) state framework, where TCI stands for Transmission Configuration Indication. For example, a beam can correspond to a TCI state. A network device can indicate multiple activated TCI states corresponding to active beams. The network device configures TCI information via RRC, which includes at least one resource configuration. The network device activates the corresponding TCI state via MAC CE or DCI, and can activate multiple TCI states simultaneously. The activated beam is the beam corresponding to the TCI state. The current beam or serving beam is the beam corresponding to the TCI state indicated by the network device among the activated beams. The network device can activate the corresponding beam by activating the TCI state via MAC CE.

[0164] In some implementations, the beams in the first beam set can be beams that meet certain conditions. For example, the first beam set may include beams whose measurement results are better than the current beam. Alternatively, the first beam set may include beams whose measurement results are greater than or equal to a preset threshold, which may be indicated by the network device or predefined by the protocol. Furthermore, the first beam set may include p beams, where p is a positive integer. Finally, the first beam set may include beams that do not satisfy the fifth event.

[0165] The measurement results of the aforementioned p beams are superior to those of the remaining beams in the currently serving cell. For example, the terminal device can select p beams with better measurement results from the beams of the currently serving cell, meaning the measurement results of the selected p beams are superior to those of the unselected beams. Here, the measured beams can refer to the beams in the serving cell other than the current beam. In some implementations, the terminal device can sort the measured beams in the serving cell in descending order of measurement results and select the first p beams as the beams in the first beam set.

[0166] The measurement result for the first beam in a set of p beams is an absolute value. The measurement results for subsequent beams can be absolute values ​​or relative values ​​compared to the measurement result of the first beam. This absolute or relative value can be an actual measured value or a mapped value.

[0167] In some implementations, p can be configured by the network device, or p can be selected by the terminal device based on the implementation, or p can be predefined by the protocol.

[0168] The aforementioned beams that meet certain conditions can be candidate beams that meet certain conditions, active candidate beams that meet certain conditions, or non-current beams that meet certain conditions. For example, a beam whose measurement result is better than the current beam can refer to a candidate beam whose measurement result is better than the current beam, or an active candidate beam whose measurement result is better than the current beam; it can also refer to any non-current beam whose measurement result is better than the current beam. A beam whose measurement result is greater than or equal to a preset threshold can refer to a candidate beam whose measurement result is greater than or equal to the preset threshold, or an active candidate beam whose measurement result is greater than or equal to the preset threshold; it can also refer to a non-current beam whose measurement result is greater than or equal to the preset threshold. For p beams, it can refer to p candidate beams, or p active candidate beams; it can also refer to p non-current beams, or beams corresponding to p resource sets related to the first event. A beam that does not meet the fifth event requirement can refer to a candidate beam that does not meet the fifth event requirement, or an active candidate beam that does not meet the fifth event requirement; it can also refer to a non-current beam that does not meet the fifth event requirement.

[0169] In the serving cell, a beam that does not satisfy the fifth event indicates that the signal quality of that beam is relatively good. The fifth event here can include one or more of LTM events 2, 3, and 5 mentioned above. For example, if beam 1 in the serving cell does not satisfy LTM event 2, it means that the measurement result of beam 1 is greater than a preset threshold, and the signal quality of beam 1 is relatively good. The fifth event can be the first event, and the beam that does not satisfy the fifth event can be a beam from the same resource set that triggered the CSI report.

[0170] By reporting information about beams with better signal quality within the serving cell, beam management within the serving cell can be triggered when the current beam quality is poor. This means the terminal device can perform beam handover within the serving cell, avoiding actual cell handover and thus reducing transmission latency. If the terminal device does not report information about non-current beams within the serving cell, the network device will typically instruct the terminal device to perform cell handover when the current beam's signal quality is poor. Therefore, the solution provided in this application can reduce the number of cell handovers performed by the terminal device, thereby reducing transmission latency.

[0171] In some implementations, the information related to the first beam set includes second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell. That is, if at least one beam in the first beam set does not belong to the candidate beams of the current serving cell, the terminal device can send the second information to the network device. In this case, the CSI report may not carry one or more of the following information for the at least one beam: index information, measurement results, and corresponding reporting configuration information. In some implementations, the information related to the at least one beam only includes the second information, excluding index information, measurement results, and corresponding reporting configuration information.

[0172] In some implementations, the network device can send first configuration information to the terminal device. This first configuration information is used to indicate whether the terminal device should send information related to a first beam set to the network device, or to indicate whether the terminal device is allowed to send such information. If the first configuration information indicates that the terminal device is allowed to send information related to the first beam set to the network device, then the CSI report includes this information; if the first configuration information indicates that the terminal device is not allowed to send such information, then the CSI report does not include this information. The following provides an example of the content configured in the first configuration information.

[0173] For example, the first configuration information is used to configure whether the terminal device is allowed to send information about candidate beams of the serving cell to the network device. As another example, the first configuration information is used to configure whether the terminal device is allowed to send information about active candidate beams of the serving cell to the network device. As another example, the first configuration information is used to configure whether the terminal device is allowed to send information about beams in the serving cell that meet specific conditions (such as measurement results greater than or equal to a preset threshold) to the network device. As another example, the first configuration information is used to configure whether the terminal device is allowed to send information about beams that do not meet a fifth event to the network device. As another example, the first configuration information is used to configure whether the terminal device is allowed to send information about p beams in the serving cell to the network device, where the measurement results of the p beams are better than those of the beams already measured in the current serving cell (excluding the p beams), and p is a positive integer. As yet another example, the first configuration information is used to configure whether the terminal device is allowed to send second information to the network device, the second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell.

[0174] In some implementations, allowing the terminal device to send candidate beams of the serving cell to the network device can refer to the beam with the best measurement result among the candidate beams of the serving cell that the terminal device is allowed to send to the network device; allowing the terminal device to send active candidate beams of the serving cell to the network device can refer to the beam with the best measurement result among the active beams of the serving cell that the terminal device is allowed to send to the network device.

[0175] In some implementations, the first configuration information can be used to configure one or more of the above information, and this application embodiment does not specifically limit this.

[0176] In some implementations, the first configuration information can also be used to configure a maximum number of beams included in the first beam set. This maximum number limits the maximum number of beams included in the first beam set, and the number of beams included in the first beam set sent by the terminal device to the network device is less than or equal to this maximum number. By setting a maximum number, the terminal device can avoid sending too much information about the serving cell's beams, which would cause high signaling overhead.

[0177] In some implementations, the first configuration information can also be used to configure a minimum number of beams included in the first beam set. This minimum value limits the minimum number of beams included in the first beam set, and the number of beams in the first beam set sent by the terminal device to the network device is greater than or equal to this minimum value. By setting a minimum value, the network device has sufficient information from beam measurement results to more objectively assess whether the serving cell is suitable for the terminal device to continue camping, which helps the network device make more reasonable handover decisions. For example, if the signal quality of most beams in the first beam set is relatively good, the network device can trigger the terminal device to perform beam management within the cell, avoiding cell handover and affecting transmission latency. If the signal quality of most beams in the first beam set is relatively poor, the network device can trigger the terminal device to perform cell handover to ensure the communication quality of the terminal device.

[0178] The network device may be configured with only the maximum number of beams included in the first beam set, or only the minimum number of beams included in the first beam set. Of course, it may also be configured with both the maximum and minimum number of beams included in the first beam set. This application embodiment does not specifically limit this.

[0179] In some implementations, the terminal device may have already undergone beam switching while determining that the current beam of the serving cell meets the trigger event. For example, the terminal device determines at time 1 that the current beam (denoted as beam 1) meets the trigger event. During the TTT (Time To Time), the terminal device switches from beam 1 to beam 2, and then from beam 2 to beam 3. During the beam switching process, the TTT remains valid, meaning the TTT duration is not extended. When the TTT expires, the terminal device's current beam is beam 3, which is the current beam at the time the event was met. The terminal device can then send relevant information about beam 3 to the network device. Additionally, the terminal device can also carry relevant information about beam 1 and beam 2, that is, send relevant information about other current beams within the TTT period to the network device, enabling the network device to make a more reasonable handover decision.

[0180] In some implementations, the CSI report may include information about a second set of beams in the candidate cells. The second set of beams may include at least one of beams that satisfy the second event and beams that do not satisfy the third event. The second set of beams may include beams from one or more candidate cells. Candidate cells may be configured by network devices and may also be referred to as neighboring cells.

[0181] The second event can include events other than the first event. That is, in addition to sending information related to the beam that satisfies the first event to the network device, the terminal device can also send information related to the beam that satisfies other events to the network device.

[0182] The third event may include events related to the candidate cell. For example, the third event may include one or more of LTM events 3, 4, and 5 mentioned above. In some implementations, the third event may include the first event, or the third event may be the first event.

[0183] The beams in the second beam set that satisfy the second event will be introduced below. Satisfying the second event can mean that the entry condition corresponding to the second event is met, and that the entry condition is met continuously for a preset time.

[0184] The second beam set can include all beams in the candidate cell that satisfy the second event. Alternatively, the second beam set can include multiple beams in the candidate cell that satisfy different triggering events. Or, the second beam set can include beams that satisfy other events, which are events other than the first event; or, the second beam set can include other beams that satisfy the second event, which are beams other than those satisfying the first event. For example, assuming the first event is event 1, the terminal device can report beams that satisfy event 1. If the candidate cell also includes beams that satisfy other events (events other than event 1), the terminal device can also report information about the beams that satisfy the other events to the network device. That is, the second beam set can include beams that satisfy the other events.

[0185] It should be noted that the beam that satisfies an event can be a single beam or multiple beams, and this application does not specifically limit this.

[0186] By reporting information about the beams that satisfy the second event to the network device, the network device can clearly identify the beam situation in each candidate cell. For example, it can determine which candidate cell has more beams that satisfy the event and which candidate cell has fewer beams that satisfy the event. This information can help the network device make reasonable handover decisions, allowing the terminal device to hand over to a suitable cell and avoid the terminal device switching back and forth between multiple cells, which is known as the "ping-pong effect".

[0187] In some implementations, whether the terminal device is allowed to send information related to the beam satisfying the second event to the network device can be configured by the network device. For example, the network device can send second configuration information to the terminal device, which configures whether the terminal device is allowed to send information related to the beam satisfying the second event to the network device. If the network device allows the terminal device to send information related to the beam satisfying the second event to the network device, the CSI report includes the information related to the beam satisfying the second event; if the network device does not allow the terminal device to send information related to the beam satisfying the second event to the network device, the CSI report does not include the information related to the beam satisfying the second event.

[0188] The following describes the beams in the second beam set that did not meet the third event. In some implementations, the CSI report may include information about the second beam set in the candidate cells that did not meet the third event.

[0189] The failure to meet the third event can refer to the failure to meet the entry conditions corresponding to the third event, or the fulfillment of the entry conditions corresponding to the third event, but not the fulfillment of the entry conditions within the preset time; or the failure to meet the third event, that is, the fulfillment of the third event previously, but now the fulfillment of the departure conditions corresponding to the third event.

[0190] By sending information about beams in candidate cells that do not meet the third event requirement to the network device, the network device can obtain more information about beams in the candidate cells. This is beneficial for the terminal device to switch to a more suitable candidate cell and avoid the terminal device switching back and forth between multiple cells, which is the so-called "ping-pong effect".

[0191] For example, a terminal device can send information about beams 1, 2, and 3 in candidate cell a, and information about beams 4, 5, and 6 in candidate cell b, to the network device. Beams 1 and 4 satisfy the third event, while beams 2, 3, 5, and 6 do not. The measurement results for beam 1 are better than those for beam 4, and the measurement results for beams 5 and 6 are better than those for beams 2 and 3. If the terminal device only sends information about beams 1 and 4, the network device is likely to trigger a handover to candidate cell a. However, the signal quality of the other beams in candidate cell a is relatively poor. If the signal quality of beam 1 deteriorates, the network device is likely to trigger another cell handover to the terminal device. However, if the terminal device sends the relevant information of beams 1 to 6 to the network device, the network device can combine the signal quality of beams 5 and 6 and may trigger the terminal device to switch to candidate cell b. In this way, if the signal quality of beam 4 deteriorates, the terminal device may switch to beam 5 or beam 6 without having to perform a cell handover, which helps to reduce transmission latency.

[0192] In some implementations, whether the CSI report includes information about beams that did not meet the third event can be configured by the network device. For example, the network device can send second configuration information to the terminal device to configure whether the terminal device is allowed to send information about beams that did not meet the third event. If the network device allows the terminal device to send information about beams that did not meet the third event, then the CSI report can include information about beams in the candidate cell that did not meet the third event.

[0193] In some implementations, the CSI report may include information about a third beam set, where beams satisfy the departure condition corresponding to the fourth event. Satisfying the departure condition can mean satisfying the departure condition at any given time, or it can mean leaving the fourth event. The fourth event can be any one or more of LTM events 2 to LTM events 5. Leaving the fourth event means consistently satisfying the departure condition corresponding to the fourth event for a preset time (TTT) related to the fourth event.

[0194] If the third beam set meets the departure condition corresponding to the fourth event or leaves the fourth event, it indicates that the signal quality of the third beam set is poor. By carrying relevant information about the third beam set in the CSI report, network devices can avoid triggering terminal devices to switch to beams in the third beam set, thus affecting the transmission latency of the terminal devices.

[0195] In some implementations, the information related to the third beam set may include third information indicating that a beam in the third beam set meets the departure condition corresponding to the fourth event, or that a beam in the third beam set leaves the fourth event. In other words, if the CSI report includes information related to the third beam set, the terminal device can carry the third information in the CSI report. If the measurement reporting is triggered by a beam in the third beam set, the CSI report may include the third information, or it may include information related to the third beam set, or information related to the beam that meets the fourth event.

[0196] To distinguish between beams that meet the departure criteria and those that do not meet the trigger event in the CSI report, a third beam set can be indicated using third information. Network devices can use this third information to prevent terminal devices from switching to beams in the third beam set, thus avoiding impacting the communication performance of the terminal devices.

[0197] In some implementations, the third beam set can be either the current beam of the serving cell or a beam of a candidate cell. For example, if a beam in the third beam set satisfies the leave condition corresponding to LTM event 2, then that beam is the current beam of the serving cell. Similarly, if a beam in the third beam set satisfies the leave condition corresponding to LTM event 3 or LTM event 5, then that beam is either the current beam of the serving cell or a beam of a candidate cell. Furthermore, if a beam in the third beam set satisfies the leave condition corresponding to LTM event 4, then that beam is a beam of a candidate cell.

[0198] Referring to Figure 4, the third information can be located at the position of a bit (such as an R bit) in Oct1. One bit corresponds to one beam, and its value indicates whether the beam corresponding to that position meets the departure condition. For example, a bit can have a value of 0 or 1. If the value of the bit is 1, it indicates that the beam corresponding to that bit has met the trigger event; if the value of the bit is 0, it indicates that the beam corresponding to that bit has met the departure condition. For instance, the first R bit in Oct1 corresponds to index 1 and measurement result 1, and the second R bit in Oct1 corresponds to index 2 and measurement result 2. If the value of the first R bit is 0, it indicates that the beams corresponding to index 1 and measurement result 1 meet the departure condition.

[0199] In some implementations, the network device can also configure the total number of beams included in the CSI report. This total number can be the maximum number of beams. For ease of description, the total number of beams will be denoted as N, where N is a positive integer. If the network device is configured with a total number N, then the total number of beams included in the CSI report reported by the terminal device to the network device will be N.

[0200] If the total number of beams included in the CSI report exceeds the number of beams that the terminal device determines needs to report, and the CSI report includes information about a fourth beam (which is not measured), then the bits occupied by the information about the fourth beam will have special values. Taking the CSI report carried in the MAC CE as an example, the information about N beams will have corresponding bit positions in the MAC CE. The information about the fourth beam can be carried in the first bit of the MAC CE, and the first bit will have a special value. The first bit can include one or more bits. Typically, the first bit can include multiple bits.

[0201] If the number of beams that the terminal device determines needs to report is less than N, the terminal device can fill the MAC CE with some special values ​​so that the bits contained in the MAC CE are fixed.

[0202] The beams that the terminal device determines need to report can refer to beams that meet certain conditions, as determined by the terminal device according to the configuration or instructions of the network device. For example, the beams that the terminal device determines need to report can include one or more of the first beam set, the second beam set, and the third beam set mentioned above. In addition, the beams that the terminal device determines need to report can also include trigger beams, which are beams that trigger CSI reporting; that is, the trigger beam can be a beam that meets the first event or a beam that leaves the first event.

[0203] In some implementations, the CSI report may include fourth information indicating that the fourth beam is an unmeasured beam. Network devices may ignore the measurement results for the fourth beam. Each beam may correspond to a single piece of fourth information, which can be used to indicate whether the corresponding beam is an unmeasured beam or whether available measurements are included at the corresponding location.

[0204] Taking the CSI report carried in the MAC CE as an example, the MAC CE includes a fourth piece of information, which is used to indicate that the CSI report includes relevant information about the unmeasured beam.

[0205] Referring to Figure 4, the fourth piece of information can also be located in a bit (such as an R bit) position in Oct1. One bit corresponds to one beam, and its value indicates whether the corresponding beam is an unmeasured beam. For example, a bit can have a value of 0 or 1. If the value of the bit is 1, it indicates that the beam corresponding to that bit is a measured beam; if the value of the bit is 0, it indicates that the beam corresponding to that bit is an unmeasured beam. For example, the first R bit in Oct1 corresponds to index 1 and measurement result 1, and the second R bit in Oct1 corresponds to index 2 and measurement result 2. If the first R bit has a value of 0, it means that the bit position containing measurement result 1 does not include available measurement results.

[0206] If the total number of beams included in the CSI report is less than the number of measured beams, then the measurement results of beams in the second beam set are better than those of beams in the candidate cells other than those in the second beam set. In other words, the terminal device can select the beam with the better measurement results as the beam in the second beam set. The terminal device can sort the measured beams of the candidate cells according to the measurement results from highest to lowest, and select one or more of the top-ranked beams as the beams in the second beam set.

[0207] In some implementations, the total number of beams included in the CSI report may not be a fixed value. The terminal device only needs to select the eligible beams for reporting according to the information configured in the network device.

[0208] In some implementations, the network device may also send third configuration information to the terminal device, which is used to configure a third threshold. This third threshold indicates the maximum number of beams that can be included in the CSI report. In some implementations, the CSI report sent by the terminal device to the network device may include information related to the number of beams within the third threshold; that is, the total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is fixed at the third threshold. In some implementations, the total number of beams included in the CSI report sent by the terminal device to the network device may be less than the third threshold; that is, the total number of beams included in the CSI report is less than or equal to the third threshold.

[0209] In some implementations, the number of beams in the second beam set that have not met the third event is greater than or equal to a first threshold, which is the minimum number of beams that have not met the third event. The first threshold can be configured by the network device or predefined by the protocol.

[0210] In some implementations, the number of beams in the second beam set that have not met the third event is less than or equal to a second threshold, which is the maximum number of beams that have not met the third event. The second threshold can be configured by the network device or predefined by the protocol.

[0211] The first threshold limits the minimum number of beams that do not meet the third event requirement reported by the terminal device, while the second threshold limits the maximum number of beams that do not meet the third event requirement reported by the terminal device. By setting the first threshold, network devices have sufficient information on the beam measurement results of candidate cells to more objectively determine which candidate cell is more suitable for handover, thus facilitating more reasonable handover decisions. Setting the second threshold avoids the terminal device reporting too much beam-related information from candidate cells, which could lead to high signaling overhead.

[0212] In some implementations, the network device may send second configuration information to the terminal device, which is used to configure one or more of the first threshold and the second threshold. In some implementations, the network device may configure only the first threshold or only the second threshold; of course, the network device may also configure both the first threshold and the second threshold simultaneously, and this application embodiment does not specifically limit this.

[0213] It should be noted that the first configuration information can be configured with one or more of the above information; the second configuration information can be configured with one or more of the above information.

[0214] In some implementations, a CSI report can be triggered either when the first event is met or when the first event is abandoned. A CSI report triggered by abandoning the first event can also be understood as a CSI report being triggered by the abandonment condition corresponding to the first event. Abandoning the first event can mean that the abandonment condition corresponding to the first event is met continuously for a preset time (TTT) related to the first event.

[0215] To distinguish between these two triggering scenarios, the CSI report may include first information indicating whether the CSI report was triggered by the departure condition corresponding to the first event. This indication can be implicit or explicit. In other words, the first information can be either explicit or implicit.

[0216] For implicit indication, if the CSI report is triggered by the departure condition corresponding to the first event, the message type carrying the CSI report can indicate that the CSI report was triggered by the departure condition; that is, the first information is the type of the message carrying the CSI report. Taking the CSI report carried in a MAC CE as an example, the type of the MAC CE can indicate that the CSI report was triggered by the departure condition corresponding to the first event. The network device can determine whether the CSI report was triggered by the departure condition corresponding to the first event based on the type of the MAC CE.

[0217] For the display indication method, the first information can be carried in the second bit of the CSI report. The second bit can include one or more bits. The second bit can be located in any bit of the CSI report. For example, the first information can be carried in a reserved bit in the CSI report. The reserved bit has a value of 0 or 1, used to indicate that the CSI report is triggered by the departure condition corresponding to the first event. As another example, the first information can be carried in the bit where the reporting configuration identifier is located in the CSI report. If the bit where the reporting configuration identifier is located has a special value, it indicates that the CSI report is triggered by the departure condition corresponding to the first event. If the CSI report is triggered by the departure condition corresponding to the first event, it means that the beam that meets the departure condition has previously met the first event, and the terminal device has reported the relevant information of the beam (including the information of the first event) to the network device. Therefore, when the beam meets the departure condition, it is not necessary to report the corresponding first event. The network device can determine the corresponding first event based on the previous reporting results. Therefore, the embodiments of this application can use the bit where the reporting configuration identifier is located to indicate that the CSI report is triggered by the departure condition corresponding to the first event.

[0218] If the CSI report is triggered by the departure condition corresponding to the first event, the CSI report may not include information about the beam's measurement results. For example, the measurement results may only include the beam's index information. Since the beam that meets the departure condition corresponding to the first event is a beam with poor signal quality, or in other words, the terminal device will not switch to that beam, signaling overhead can be reduced by omitting the measurement results for that beam.

[0219] In some implementations, if the CSI report is triggered by the departure condition corresponding to the first event, or by the departure first event, the CSI report may include first information and a report configuration identifier.

[0220] In some implementations, if beam 1 satisfies trigger event 1, the terminal device can send a CSI report to the network device. This CSI report includes a measurement configuration identifier, and the event corresponding to this identifier is event 1. The network device can save this measurement configuration identifier. In the next measurement, if beam 1 leaves event 1, and the departure condition corresponding to event 1 is met, the terminal device can send a CSI report to the network device. This CSI report still includes the measurement configuration identifier. After receiving the CSI report, the network device, based on the fact that the measurement configuration identifier is the same as the previous one, can determine that the current CSI report was triggered by the departure condition corresponding to event 1, or that beam 1 satisfies the departure condition corresponding to event 1. In other words, this embodiment can indicate that the beam satisfies the departure condition corresponding to event 1 by repeatedly reporting the measurement configuration identifier, thus reducing signaling overhead.

[0221] The above describes the information included in a CSI report. It should be noted that a CSI report may include one or more of the above information. Specifically, a CSI report may include one or more of the following: information related to the first beam set, information related to the second beam set, information related to the third beam set, and first information. For example, a CSI report may include information related to the first beam set but not information related to the second and third beam sets. Alternatively, a CSI report may include information related to the first and second beam sets but not information related to the third beam set. Another example: a CSI report may include information related to the first and third beam sets but not information related to the second beam set. Yet another example: a CSI report may include information related to the second and third beam sets but not information related to the first beam set. Finally, a CSI report may include information related to the first, second, and third beam sets.

[0222] It should be noted that the events in this embodiment can also be replaced with triggering events. The events can be those configured in the reporting configuration.

[0223] It should be noted that "greater than or equal to" in the embodiments of this application may include one or more of "greater than or equal to", "greater than", and "equal to", and "less than or equal to" in the embodiments of this application may include one or more of "less than or equal to", "less than", and "equal to".

[0224] The method embodiments of this application have been described in detail above with reference to Figures 1 to 4. The apparatus embodiments of this application will be described below with reference to Figures 5 to 7. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0225] Figure 5 is a schematic block diagram of a communication device provided in an embodiment of this application. As shown in Figure 5, the communication device 500 includes a transmitting module 510.

[0226] In one possible implementation, the device 500 can be used to perform the steps described above by the terminal device.

[0227] The sending module 510 is configured to: send a Channel State Information (CSI) report to a network device, wherein the CSI report is a measurement report triggered by a first event, and the CSI report includes one or more of the following information: relevant information about a first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; relevant information about a second beam set in a candidate cell, wherein the second beam set includes at least one of beams that satisfy a second event and beams that do not satisfy a third event; relevant information about a third beam set, wherein the beams in the third beam set satisfy the departure condition corresponding to a fourth event; and first information, wherein the first information is used to indicate whether the CSI report is triggered by the departure condition corresponding to the first event.

[0228] In some implementations, the first beam set includes one or more of the following beams: beams that do not satisfy the fifth event; beams whose measurement results are greater than or equal to a preset threshold; p beams, where the measurement results of the p beams are better than those of the beams in the currently serving cell that are measured, excluding the p beams, where p is a positive integer; and beams whose measurement results are better than those of the current beam.

[0229] In some implementations, the beams in the first beam set belong to the candidate beams of the current serving cell or the candidate beams activated by the current serving cell.

[0230] In some implementations, the relevant information of the first beam set includes second information, which indicates that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell.

[0231] In some implementations, the relevant information of the third beam set includes third information, which is used to indicate that the beams in the third beam set satisfy the departure condition corresponding to the fourth event.

[0232] In some implementations, the relevant information of at least one of the first beam set, the second beam set, and the third beam set includes one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam.

[0233] In some implementations, the communication device 500 further includes a receiving module, configured to: receive first configuration information from a network device, the first configuration information being used to instruct the terminal device whether to send relevant information about the first beam set to the network device. The terminal device can determine whether to report relevant information about the first beam set based on the first configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0234] In some implementations, the first configuration information is used to configure one or more of the following: whether the terminal device is allowed to send second information to the network device, the second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell; whether the terminal device is allowed to send information related to the candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the active candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are greater than or equal to a preset threshold to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell that do not satisfy the fifth event to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are better than the current beam to the network device; whether the terminal device is allowed to send information related to p beams in the current serving cell, the measurement results of the p beams being better than the beams other than the p beams among the measured beams of the current serving cell, where p is a positive integer.

[0235] In some implementations, the first configuration information is further used to configure one or more of the following: the maximum number of beams included in the first beam set; the minimum number of beams included in the first beam set.

[0236] In some implementations, the CSI report is carried in the Media Access Control (MAC) control element CE.

[0237] In some implementations, the total number of beams included in the CSI report is greater than the number of beams that the terminal device determines needs to report. If the CSI report includes information about a fourth beam, which is an unmeasured beam, then the MAC CE satisfies one or more of the following: the information about the fourth beam is carried in a first bit in the MAC CE, and the value of the first bit is a special value; the MAC CE includes fourth information, which is used to indicate that the fourth beam is an unmeasured beam.

[0238] In some implementations, if the total number of beams included in the CSI report is less than the number of beams measured, the measurement results of the beams in the second beam set are superior to those of the beams in the candidate cell other than those in the second beam set.

[0239] In some implementations, the number of beams in the second beam set that do not satisfy the third event is greater than or equal to a first threshold, which is the minimum number of beams that do not satisfy the third event.

[0240] In some implementations, the number of beams included in the second beam set is less than or equal to a second threshold, which is the maximum number of beams that did not meet the third event.

[0241] In some implementations, the communication device 500 further includes a receiving module, configured to: receive second configuration information from a network device, the second configuration information being configured with one or more of the following: whether the terminal device is allowed to send information related to beams that satisfy the second event; whether the terminal device is allowed to send information related to beams that do not satisfy the third event; a first threshold, the first threshold being the minimum number of beams that do not satisfy the third event; and a second threshold, the second threshold being the maximum number of beams that do not satisfy the third event. The terminal device can determine which beam information to report based on the second configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0242] In some implementations, the first information is the type of the message carrying the CSI report. Indicating that the CSI report was triggered by a departure condition by using the type of the message carrying the CSI report eliminates the need to include indication information in the CSI report, thus reducing signaling overhead.

[0243] In some implementations, the first information is carried in a reserved bit in the CSI report, or the first information is carried in the bit occupied by the reporting configuration identifier in the CSI report.

[0244] In some implementations, the communication device 500 further includes a receiving module for: receiving third configuration information from a network device, the third configuration information being used to configure a third threshold, wherein the total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is less than or equal to the third threshold.

[0245] Figure 6 is a schematic block diagram of a communication device provided in an embodiment of this application. As shown in Figure 6, the communication device 600 includes a receiving module 610.

[0246] In one possible implementation, the device 600 can be used to perform the steps described above by the network device.

[0247] The receiving module 610 is configured to: receive a Channel State Information (CSI) report from a terminal device, wherein the CSI report is a measurement report triggered by a first event, and the CSI report includes one or more of the following information: relevant information about a first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; relevant information about a second beam set in a candidate cell, wherein the second beam set includes at least one of beams that satisfy a second event and beams that do not satisfy a third event; relevant information about a third beam set, wherein the beams in the third beam set satisfy a departure condition corresponding to a fourth event; and first information, wherein the first information is used to indicate whether the CSI report is triggered by a departure condition corresponding to the first event.

[0248] In some implementations, the first beam set includes one or more of the following beams: beams that do not satisfy the fifth event; beams whose measurement results are greater than or equal to a preset threshold; p beams, where the measurement results of the p beams are better than those of the beams in the currently serving cell that are measured, excluding the p beams, where p is a positive integer; and beams whose measurement results are better than those of the current beam.

[0249] In some implementations, the beams in the first beam set belong to the candidate beams of the current serving cell or the candidate beams activated by the current serving cell.

[0250] In some implementations, the relevant information of the first beam set includes second information, which indicates that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell.

[0251] In some implementations, the relevant information of the third beam set includes third information, which is used to indicate that the beams in the third beam set satisfy the departure condition corresponding to the fourth event.

[0252] In some implementations, the relevant information of at least one of the first beam set, the second beam set, and the third beam set includes one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam.

[0253] In some implementations, the communication device 600 further includes a transmitting module, configured to: transmit first configuration information to a terminal device, the first configuration information indicating whether the terminal device should transmit information related to the first beam set to the network device. The terminal device can determine whether to report information related to the first beam set based on the first configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0254] In some implementations, the first configuration information is used to configure one or more of the following: whether the terminal device is allowed to send second information to the network device, the second information indicating that at least one beam in the first beam set does not belong to the candidate beams of the current serving cell; whether the terminal device is allowed to send information related to the candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the active candidate beams of the current serving cell to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are greater than or equal to a preset threshold to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell that do not satisfy the fifth event to the network device; whether the terminal device is allowed to send information related to the beams in the current serving cell whose measurement results are better than the current beam to the network device; whether the terminal device is allowed to send information related to p beams in the current serving cell, the measurement results of the p beams being better than the beams other than the p beams among the measured beams of the current serving cell, where p is a positive integer.

[0255] In some implementations, the first configuration information is further used to configure one or more of the following: the maximum number of beams included in the first beam set; the minimum number of beams included in the first beam set.

[0256] In some implementations, the CSI report is carried in the Media Access Control (MAC) control element CE.

[0257] In some implementations, the total number of beams included in the CSI report is greater than the number of beams that the terminal device determines needs to report. If the CSI report includes information about a fourth beam, which is an unmeasured beam, then the MAC CE satisfies one or more of the following: the information about the fourth beam is carried in a first bit in the MAC CE, and the value of the first bit is a special value; the MAC CE includes fourth information, which is used to indicate that the fourth beam is an unmeasured beam.

[0258] In some implementations, if the total number of beams included in the CSI report is less than the number of beams measured, the measurement results of the beams in the second beam set are superior to those of the beams in the candidate cell other than those in the second beam set.

[0259] In some implementations, the number of beams in the second beam set that do not satisfy the third event is greater than or equal to a first threshold, which is the minimum number of beams that do not satisfy the third event.

[0260] In some implementations, the number of beams included in the second beam set is less than or equal to a second threshold, which is the maximum number of beams that did not meet the third event.

[0261] In some implementations, the communication device 600 further includes a transmitting module, configured to: transmit second configuration information to a terminal device, the second configuration information being configured with one or more of the following: whether the terminal device is allowed to transmit information related to beams that satisfy the second event; whether the terminal device is allowed to transmit information related to beams that do not satisfy the third event; a first threshold, the first threshold being the minimum number of beams that do not satisfy the third event; and a second threshold, the second threshold being the maximum number of beams that do not satisfy the third event. The terminal device can determine which beams' information to report based on the second configuration information, enabling the terminal device to clearly define the beam information that needs to be carried in the measurement report.

[0262] In some implementations, the first information is the type of the message carrying the CSI report. Indicating that the CSI report was triggered by a departure condition by using the type of the message carrying the CSI report eliminates the need to include indication information in the CSI report, thus reducing signaling overhead.

[0263] In some implementations, the first information is carried in a reserved bit in the CSI report, or the first information is carried in the bit occupied by the reporting configuration identifier in the CSI report.

[0264] In some implementations, the communication device 600 further includes a transmitting module for: transmitting third configuration information to a terminal device, the third configuration information being used to configure a third threshold, wherein the total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is less than or equal to the third threshold.

[0265] It should be understood that devices 500 and 600 are embodied in the form of functional modules. The term "module" here can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that device 500 can specifically be a terminal device in the above embodiments, and device 500 can be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiments. Device 600 can specifically be a network device in the above embodiments, and device 600 can be used to execute the various processes and / or steps corresponding to the network device in the above method embodiments. To avoid repetition, further details are omitted here.

[0266] The aforementioned device 500 has the function of implementing the corresponding steps performed by the terminal device in the aforementioned method, and the aforementioned device 600 has the function of implementing the corresponding steps performed by the network device in the aforementioned method. These functions can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned functions.

[0267] In embodiments of this application, devices 500 and 600 may also be chips, such as a system-on-a-chip (SOC) or a modem. Correspondingly, the receiving module and the transmitting module may be the transceiver circuits of the chip, and are not limited thereto.

[0268] Figure 7 is a schematic structural diagram of a communication device according to an embodiment of this application. The dashed lines in Figure 7 indicate that the unit or module is optional. This device 700 can be used to implement the methods described in the above method embodiments. Device 700 can be a chip, a terminal device, or a network device.

[0269] The apparatus 700 may include one or more processors 710. The processor 710 may support the apparatus 700 in implementing the methods described in the preceding method embodiments. The processor 710 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), ASICs, field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0270] The apparatus 700 may also include one or more memories 720. The memories 720 store a program that can be executed by the processor 710, causing the processor 710 to perform the methods described in the preceding method embodiments. The memories 720 may be independent of the processor 710 or integrated within the processor 710.

[0271] The device 700 may also include a transceiver 730. The processor 710 can communicate with other devices or chips via the transceiver 730. For example, the processor 710 can send and receive data with other devices or chips via the transceiver 730.

[0272] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal device or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0273] This application also provides a computer program product. The computer program product includes a program. This computer program product can be applied to a terminal device or network device provided in the embodiments of this application, and the program causes a computer to execute the methods performed by the terminal device or network device in the various embodiments of this application.

[0274] This application also provides a computer program. This computer program can be applied to the terminal device or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal device or network device in various embodiments of this application.

[0275] It should be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0276] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0277] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0278] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be RAN nodes or terminals, or modules within RAN nodes or terminals. Information transmission and reception can be between RAN nodes and terminals, such as between a base station and a terminal; between two RAN nodes, such as between a CU and a DU; or between different modules within a single device, such as between a terminal chip and other modules of the terminal, or between a base station chip and other modules of the base station.

[0279] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0280] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0281] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0282] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer 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 of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0283] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of wireless communication performed by a terminal device, comprising: include: Send a Channel State Information (CSI) report to the network device. The CSI report is a measurement report triggered by a first event, and the CSI report includes one or more of the following information: The relevant information of the first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; Information related to the second beam set in the candidate cells, the second beam set including at least one of beams that satisfy the second event and beams that do not satisfy the third event; The relevant information of the third beam set, wherein the beams in the third beam set satisfy the departure condition corresponding to the fourth event; The first information is used to indicate whether the CSI report is triggered by the departure condition corresponding to the first event.

2. The method according to claim 1, characterized in that, The first beam set includes one or more of the following beams: The beam does not satisfy the fifth event; Beams whose measurement results are greater than or equal to a preset threshold; p beams, wherein the measurement results of the p beams are better than those of the beams measured in the current serving cell other than the p beams, where p is a positive integer; The measurement results are superior to those of the current beam.

3. The method according to claim 1 or 2, characterized in that, The beams in the first beam set belong to the candidate beams of the current serving cell or the active candidate beams of the current serving cell.

4. The method of claim 2, wherein, The relevant information of the first beam set includes second information, which is used to indicate that at least one beam in the first beam set does not belong to the candidate beam of the current serving cell.

5. The method according to any one of claims 1-4, characterized in that, The relevant information of the third beam set includes third information, which is used to indicate that the beams in the third beam set meet the departure condition corresponding to the fourth event.

6. The method according to any one of claims 1-3, characterized in that, The relevant information of at least one of the first beam set, the second beam set, and the third beam set includes one or more of the following: beam measurement results, beam index information, and reporting configuration information corresponding to the beam.

7. The method according to any one of claims 1-6, characterized in that, The method further includes: The terminal device receives first configuration information from the network device, the first configuration information being used to indicate whether the terminal device should send relevant information about the first beam set to the network device.

8. The method according to claim 7, characterized in that, The first configuration information is used to configure one or more of the following: Whether to allow the terminal device to send second information to the network device, the second information being used to indicate that at least one beam in the first beam set does not belong to the candidate beam of the current serving cell; Whether to allow the terminal device to send information about the candidate beams of the current serving cell to the network device; Whether to allow the terminal device to send information about the candidate beams currently active in the serving cell to the network device; Whether to allow the terminal device to send information about beams in the current serving cell whose measurement results are greater than or equal to a preset threshold to the network device; Whether to allow the terminal device to send information about beams in the current serving cell that do not meet the fifth event to the network device; Whether to allow the terminal device to send information about beams in the current serving cell whose measurement results are better than the current beam to the network device; Whether to allow the terminal device to send information about p beams in the current serving cell to the network device, wherein the measurement results of the p beams are better than those of the beams in the current serving cell that have been measured, and p is a positive integer.

9. The method according to claim 7 or 8, characterized in that, The first configuration information is also used to configure one or more of the following: The maximum number of beams included in the first beam set; The first beam set includes the minimum number of beams.

10. The method according to any one of claims 1-9, characterized in that, The CSI report is carried in the Media Access Control (MAC) control element CE.

11. The method of claim 10, wherein, If the total number of beams included in the CSI report is greater than the number of beams that the terminal device determines needs to report, and if the CSI report includes information about a fourth beam that is not measured, then the MAC CE satisfies one or more of the following: The relevant information of the fourth beam is carried in the first bit of the MAC CE, and the value of the first bit is a special value. The MAC CE includes fourth information, which indicates that the fourth beam is an unmeasured beam.

12. The method according to any one of claims 1-10, characterized in that, If the total number of beams included in the CSI report is less than the number of beams measured, then the measurement results of the beams in the second beam set are better than those of the beams in the candidate cell other than those in the second beam set.

13. The method according to any one of claims 1-12, characterized in that, The number of beams in the second beam set that do not satisfy the third event is greater than or equal to a first threshold, where the first threshold is the minimum number of beams that do not satisfy the third event.

14. The method of any one of claims 1-12, wherein, The number of beams included in the second beam set is less than or equal to a second threshold, which is the maximum number of beams that do not meet the third event.

15. The method according to any one of claims 1-14, characterized in that, The method further includes: Receive second configuration information from the network device, the second configuration information being used to configure one or more of the following: Whether to allow the terminal device to send information related to the beam that satisfies the second event; Whether to allow the terminal device to send information related to the beam that has not met the third event; A first threshold, which is the minimum number of beams that fail to meet the third event; The second threshold is the maximum number of beams that fail to meet the third event.

16. The method of any one of claims 1-15, wherein, The first piece of information is the type of message carrying the CSI report.

17. The method of any one of claims 1-15, wherein, The first information is carried in the reserved bits in the CSI report, or the first information is carried in the bits occupied by the reporting configuration identifier in the CSI report.

18. The method according to any one of claims 1-17, characterized in that, The method further includes: The network device receives third configuration information, which is used to configure a third threshold. The total number of beams included in the CSI report is equal to the third threshold, or the total number of beams included in the CSI report is less than or equal to the third threshold.

19. A method of wireless communication by a network device, comprising: include: The terminal device receives a Channel State Information (CSI) report, which is a measurement report triggered by a first event. The CSI report includes one or more of the following information: The relevant information of the first beam set in the current serving cell of the terminal device, wherein the beams in the first beam set do not include the current beam of the terminal device; Information related to the second beam set in the candidate cells, the second beam set including at least one of beams that satisfy the second event and beams that do not satisfy the third event; The relevant information of the third beam set, wherein the beams in the third beam set satisfy the departure condition corresponding to the fourth event; The first information is used to indicate whether the CSI report is triggered by the departure condition corresponding to the first event.

20. A communications device, characterized by include: A processor coupled to a memory for storing a computer program, wherein when the processor invokes the computer program, the communication device performs the method as claimed in any one of claims 1 to 18, or the method as claimed in claim 19.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to perform the method as claimed in any one of claims 1 to 18, or the method as claimed in claim 19.

22. A computer program product, characterised in that, The computer program product includes: computer program code that, when run on a communication device, causes the communication device to perform the method as described in any one of claims 1 to 18, or the method as described in claim 19.

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