Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: when a first condition is met, a terminal device sends a measurement report to a network device, the first condition being associated with a change in measurement results of beams of one or more cells triggering a predetermined event. The first condition is set to trigger the terminal device to send the measurement report, and first condition is associated with a change in the measurement results of the beams of the one or more cells triggering the predetermined event. Thus, the terminal device can promptly report to the network device when the measurement results of the beams change, enabling the network device to promptly acquire the changes in the beams and maintain a low radio interface signaling load.

Description

Wireless communication methods, terminal devices, and network devices Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal device, and network device. Background Technology

[0002] Terminal devices can perform measurement tasks and report the results to network devices in the form of measurement reports. This allows network devices to make relevant decisions based on the information reported by the terminal devices, such as cell handover or beam switching. Therefore, how to trigger the terminal devices to send measurement reports becomes a problem that needs to be solved.

[0003] Summary of the Invention

[0004] This application provides a wireless communication method, terminal device, and network device. The various aspects covered by this application are described below.

[0005] In a first aspect, a wireless communication method is provided, comprising: when the first condition is met, a terminal device sends a measurement report to a network device, wherein the first condition is associated with a change in the measurement results of beams of one or more cells that trigger a predetermined event.

[0006] In a second aspect, a wireless communication method is provided, comprising: a network device sending information about a first condition to a terminal device, wherein the first condition is used to trigger the terminal device to send a measurement report to the network device, and the first condition is associated with a change in the measurement results of beams of one or more cells that trigger a predetermined event.

[0007] Thirdly, a terminal device is provided, comprising: a transceiver unit, configured to send a measurement report to a network device when a first condition is met, wherein the first condition is associated with a change in the measurement results of beams of one or more cells that trigger a predetermined event.

[0008] Fourthly, a network device is provided, comprising: a transceiver unit for sending information about a first condition to a terminal device, wherein the first condition is used to trigger the terminal device to send a measurement report to the network device, and the first condition is associated with changes in the measurement results of beams of one or more cells that trigger a predetermined event.

[0009] Fifthly, a terminal device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals so that the terminal device performs the method as described in the first aspect.

[0010] In a sixth aspect, a network device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or transmit signals so that the network device performs the method as described in the second aspect.

[0011] A seventh aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in any one of the first or second aspects.

[0012] Eighthly, a chip is provided, including a processor for calling a program from memory to cause a device having the chip mounted to perform the method as described in the first or second aspect.

[0013] Ninth aspect, a computer-readable storage medium is provided having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0014] A tenth aspect provides a computer program product, including a program that causes a computer to perform the method as described in the first or second aspect.

[0015] Eleventhly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0016] In this embodiment, a first condition is used to trigger the terminal device to send a measurement report. The first condition is associated with the change in the measurement results of the beams of one or more cells that trigger a predetermined event. Therefore, the terminal device can report to the network device in a timely manner when the beam measurement results change, so that the network device can obtain the beam change situation in a timely manner and maintain a low signaling load on the wireless interface. Attached Figure Description

[0017] Figure 1 is a system architecture example diagram of a wireless communication system applicable to embodiments of this application.

[0018] Figure 2 is a schematic diagram of the process of measurement reporting by the terminal device.

[0019] Figure 3 is a schematic diagram of the LTM process applicable to the embodiments of this application.

[0020] Figure 4 is a flowchart illustrating the wireless communication method according to an embodiment of this application.

[0021] Figure 5 is a schematic diagram of the structure of the terminal device according to an embodiment of this application.

[0022] Figure 6 is a schematic diagram of the structure of a network device according to an embodiment of this application.

[0023] Figure 7 is a schematic diagram of a communication apparatus according to an embodiment of this application. Detailed Implementation

[0024] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0025] Wireless communication system

[0026] Figure 1 is an example diagram of the system architecture of a wireless communication system 100 to which embodiments of this application can be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 can provide network coverage for a specific geographical area and can communicate with the terminal device 120 located within that coverage area. The terminal device 120 can access a network, such as a wireless network, through the network device 110. Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity; this embodiment of the application does not limit this.

[0027] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: fifth generation (5G) systems, new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation mobile communication systems, satellite communication systems, etc.

[0028] In this application embodiment, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus. The terminal device in this application embodiment can be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, in-vehicle equipment, etc. Terminal devices can also be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, and smart homes. Optionally, terminal devices can act as base stations. For example, a terminal device can act as a dispatching entity, providing sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) systems. For instance, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through base stations.

[0029] In this embodiment, the network device can be a device used to communicate with a terminal device. The network device can be an access network device or a wireless access network device. For example, the network device can be a base station. The term "base station" can broadly encompass various names as follows, or can be replaced by names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station (MeNB), secondary station (SeNB), multi-mode radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar entity, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, or an entity that performs base station functions in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or an entity that performs base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0030] Furthermore, base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0031] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0032] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform such as a cloud platform.

[0033] Periodic reporting mechanism after measurement event is triggered

[0034] In third-generation communication systems such as Wideband Code Division Multiple Access (WCDMA), network equipment achieves soft handover by setting an active set. An active set can include one or more serving cells. During communication, the terminal equipment continues to measure the serving cells in this active set and ranks them based on the measured signal strength or signal quality. When the cell at the top of the ranking changes, the terminal equipment triggers a measurement report, ensuring the network equipment always knows which cell in the active set is the best.

[0035] In 4G LTE and 5G NR systems, a periodic reporting mechanism after a measurement event is triggered has been introduced. The terminal device measures the serving cell and neighboring cells, and determines whether a measurement event has occurred based on the measurement results and the configuration parameters of the measurement events configured by the network. For example, measurement event A3 is defined as the condition for an A3 event being met when the difference between the signal strength of a neighboring cell and the signal strength of the serving cell is greater than or equal to a predefined offset value. If this condition remains met for a period of time (e.g., within the duration of the time-to-trigger (TTT) timer), then the A3 event is triggered when the TTT timer expires. The periodic reporting mechanism after a measurement event is triggered means that after the terminal device triggers a measurement event, it reports a measurement report message including the measurement event (including the cells that meet the conditions and the measurement results of these cells) to the network device, and continues to report according to the period configured by the network device. For example, as shown in Figure 2, the periodic reporting after a measurement event is triggered may include some or all of the following steps.

[0036] In step 210, the network device sends a measurement configuration to the terminal device, which may include parameters such as measurement configuration (measConfig), measurement object (measObj), and measurement identifier (measId).

[0037] In step 220, the terminal device performs measurements. For example, the terminal device can measure the reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and signal-to-interference-plus-noise ratio (SINR) of the cell, and obtain the corresponding measurement results.

[0038] In steps 230 to 250, the terminal device sends a measurement report to the network device. This measurement report may be periodic; for example, there may be a predetermined reporting interval between steps 230 and 240, and between steps 240 and 250.

[0039] In theory, network devices can continuously track measurement reports reported by terminal devices to obtain measurement results of neighboring cells that meet a certain event, thereby knowing the best cell or the top N neighboring cells. However, periodic measurement reports increase the signaling overhead of the radio interface, and the fact that network devices need to track measurement reports to obtain such information increases the processing complexity of the network devices.

[0040] Therefore, the measurement report reporting mechanism can be improved in two ways. In the first method, without using periodic reporting after event triggering, when the measurement result of a neighboring cell that meets a certain event is higher than the measurement result of the current best neighboring cell by a threshold and remains so for a certain duration (e.g., TTT duration), the terminal device re-triggers and reports a measurement report. However, due to the introduction of the TTT duration, the determination of the best cell when the terminal device reports the measurement report may be inconsistent, because at the time of reporting, there may be a third neighboring cell with the strongest signal but not meeting the TTT duration requirement. In the second method, the mechanism of periodic reporting after event triggering can still be used, but during reporting, a measurement report is only triggered and reported when all of the best N neighboring cells have changed, where N≤2. This reduces the signaling overhead of the radio interface and allows the network device to know which N neighboring cells are the best.

[0041] Layer 1 / L2-triggered mobility (LTM) process

[0042] The LTM-based cell update process aims to shorten cell handover latency and ensure service continuity. Terminal equipment can determine whether to trigger an L1 event based on Layer 1 (L1) beam measurement results and report the corresponding measurement results. L1 events include, for example: the serving cell's beam signal quality is below a certain threshold; the candidate cell's beam signal quality is higher than the serving cell's beam signal quality by a certain offset; the candidate cell's beam signal quality is above a certain threshold; and the serving cell's beam signal quality is below one threshold while the candidate cell's beam signal quality is above another threshold. The LTM process is described below with reference to Figure 3.

[0043] As shown in Figure 3, in step 310, the network device sends the measurement configuration to the terminal device.

[0044] In step 320, the terminal device performs Layer 3 (L3) measurements based on the measurement tasks deployed by the network device.

[0045] In step 330, the terminal device sends a measurement report based on the L3 measurement results, which may include, for example, measurement events and corresponding measurement results.

[0046] In step 340, based on the received measurement report, the network device sends the candidate cell list to the terminal device via a radio resource control (RRC) reconfiguration message. The RRC reconfiguration message may also include configuration parameters and reporting parameters for L1 measurement objects and L1 events of LTM.

[0047] In step 350, the terminal device performs L1 measurement on the beams within the candidate cell.

[0048] In step 360, the terminal device reports the measurement results of L1 measurement, such as information including L1 event, candidate cell that triggered L1 event, beam in candidate cell that triggered L1 event, and measurement results of beam in candidate cell that triggered L1 event.

[0049] In step 370, the network device sends a physical downlink control channel (PDCCH) order for the early synchronization process.

[0050] In step 380, the network device sends a Transmission Configuration Indication (TCI) state activation message, etc., to activate certain TCI states.

[0051] In this process, network devices need to determine when to send PDCCH sequences and TCI status activation messages based on measurement reports sent by terminal devices.

[0052] In step 380, the network device sends an LTM cell switch command, enabling the terminal device to access a candidate cell and thus complete the cell handover.

[0053] In the above process, network devices need to know the measurement results of the radio signals of the beams within the candidate cells. This allows them to determine the preamble corresponding to the beam in the PDCCH sequence during pre-synchronization, the TCI state to be activated during TCI state activation, and the synchronization signal block / physical broadcast channel block (SS / PBCH block, SSB) information in the contention-free random access (CFRA) resources of the LTM cell handover command. Therefore, a suitable L1 measurement reporting mechanism needs to be designed to enable network devices to obtain beam change information in a timely manner while maintaining a low signaling load on the radio interface.

[0054] During LTM cell handover, if the triggering and reporting mechanism for L1 measurements continues as for L3 measurements, network devices will be unable to obtain information about the optimal beam and its measurement results in a timely manner. The LTM cell handover process shown in Figure 3 is not instantaneous but involves a preparation process. During this preparation, the ranking of beams within the candidate cell may change. If this information cannot be sent to the network devices in a timely manner, the network devices can only make judgments based on the information in the last received measurement report, which may be outdated.

[0055] Therefore, in this embodiment of the application, a first condition is used to trigger the terminal device to send a measurement report. The first condition is associated with the change in the measurement results of the beams of one or more cells that trigger a predetermined event. Thus, the terminal device can promptly report to the network device when the beam measurement results change, enabling the network device to obtain the beam change information in a timely manner and maintain a low signaling load on the wireless interface.

[0056] It should be noted that the technical solutions of this application embodiment can be used, for example, for reporting the measurement results of Layer 1 measurement in the LTM process. That is, the measurement report sent by the terminal device triggered by the first condition may include the Layer 1 measurement results in the LTM process, but it is not limited thereto. The technical solutions of this application embodiment can also be applied to other scenarios that require triggering the terminal device to report measurements.

[0057] The embodiments of this application will be described in detail below with reference to Figure 4.

[0058] Figure 4 is a flowchart illustrating a wireless communication method provided in an embodiment of this application. The method 400 shown in Figure 4 can be executed by a terminal device and a network device. The terminal device can be, for example, the terminal device 120 shown in Figure 1, and the network device can be, for example, the network device 110 shown in Figure 1.

[0059] Referring to Figure 4, in step 410, if the first condition is met, the terminal device sends a measurement report to the network device; correspondingly, the network device receives the measurement report sent by the terminal device.

[0060] The first condition is associated with changes in the measurement results of the beams of one or more cells that trigger a predetermined event.

[0061] Taking the LTM process as an example, the predetermined event can be, for example, the L1 event mentioned above. After the terminal device has reported the measurement report triggered by the L1 event, it can also determine whether to send the measurement report to the network device again based on whether the first condition is met. Since the first condition is related to the change in the measurement results of the beams of one or more cells that triggered the predetermined event, the terminal device can report to the network device in a timely manner when the beam measurement results change, so that the network device can obtain the beam change situation in a timely manner. Moreover, since this reporting does not depend on periodicity, it can also maintain a low signaling load on the radio interface.

[0062] Optionally, the network device can send information about the first condition to the terminal device; correspondingly, the terminal device receives the information about the first condition. Taking the LTM process shown in Figure 3 as an example, the network device can inform the terminal device of the information about the first condition through an RRC reconfiguration message in step 340. In this way, the terminal device can trigger the reporting of L1 measurement in step 360 when the first condition is met.

[0063] The first condition will now be described in detail with reference to Examples 1 and 2.

[0064] Example 1

[0065] In Example 1, the first condition includes a change in the N beams (i.e., the N best beams or N optimal beams) that have the best measurement results in one or more cells that trigger a predetermined event, where N is a positive integer (e.g., N = 1 or N = 2). In other words, if the N beams with the best measurement results in one or more cells that trigger a predetermined event change, the terminal device sends a measurement report to the network device.

[0066] Here, the N beams with the best measurement results can be, for example, the N beams with the best measurement results in the same cell; or, the N beams with the best measurement results can be the N beams with the best measurement results among all beams in one or more cells.

[0067] It should be noted that the term "beam change" refers, for example, to a change in the beam ranking after beams are sorted based on measurement results. For instance, the beam with the best measurement result (e.g., the beam with the best signal strength and / or signal quality) was originally beam 1, but after the terminal device sends a measurement report, it is found that the beam with the best measurement result has changed from beam 1 to beam 2; therefore, the beam with the best measurement result is considered to have changed. Similarly, the beam with the second-best measurement result (e.g., the beam with the second-best signal strength and / or signal quality) was originally beam 3, but after the terminal device sends a measurement report, it is found that the beam with the second-best measurement result has changed from beam 3 to beam 4; therefore, the beam with the second-best measurement result is considered to have changed. Since the determination of the N optimal beams is based on beam measurement results, or in other words, changes in beam measurement results lead to changes in the N optimal beams, it can be considered that the first condition described in the embodiments of this application is related to changes in the beam measurement results of one or more cells that trigger a predetermined event.

[0068] For example, the N best beams in the measurement results are the N best beams in the same cell. If the N best beams in any cell that triggers a predetermined event change, the terminal device resends a measurement report to the network device, which includes, for example, at least the cell where the beams changed and the measurement results of the N best beams in that cell. Assume that the three candidate cells that trigger the L1 event in the LTM procedure, and the order of the beam measurement results in these candidate cells from highest to lowest, are: C_1{B1_1, B1_2, B1_3}, C_2{B2_1, B2_2, B2_3}, C_3{B3_1, B3_2, B3_3};

[0069] Wherein, M in C_M represents the candidate cell number or identifier (e.g., physical cell identifier), M≥1; L in BM_L represents the beam number or identifier within the candidate cell.

[0070] Taking N=1 as an example, if the best beam in any of the three candidate cells that trigger the L1 event changes—for example, if the beam order in cell C_2 changes from C_2{B2_1, B2_2, B2_3} to C_2{B2_2, B2_1, B2_3}, meaning the best beam in cell C_2 changes from B2_1 to B2_2, and the second-best beam in cell C_2 changes from B2_2 to B2_1—then the terminal device can trigger a measurement report. This report must include at least the beams in C_2 (C_2{B2_2, B2_1, B2_3}) and their latest measurement results. In other words, if the best N beams in one of the cells that trigger the predetermined event change, the terminal device can be triggered to send a measurement report, providing the network device with the latest beam measurement results so that the network device can obtain the latest measurement results promptly.

[0071] For example, the N best beams in terms of measurement results are the N best beams among all beams in one or more cells. That is, based on the measurement results of all beams in one or more cells that trigger a predetermined event, these beams are ranked. When the N best beams in the ranking change, the terminal device triggers a measurement report, which includes, for example, at least the cell where the beams changed, and the measurement results of the N best beams. Assume that in the LTM process, the three candidate cells that trigger the L1 event, and the ranking of the beam measurement results in these candidate cells from highest to lowest, are: C_1{B1_1, B1_2, B1_3}, C_2{B2_1, B2_2, B2_3}, C_3{B3_1, B3_2, B3_3};

[0072] Wherein, M in C_M represents the candidate cell number or identifier (e.g., physical cell identifier), M≥1; L in BM_L represents the beam number or identifier within the candidate cell.

[0073] In the current ranking, beam B1_1 in cell C_1 has the best measurement result and is therefore ranked first, while beam B3_3 in cell C_3 has the worst measurement result and is ranked last. Taking N=2 as an example, the terminal device will only trigger a measurement report when both of the first two beams change. Assume the changed beam ranking is as follows:

[0074] C_2{B2_1}, C_1{B1_1, B1_2, B1_3}, C_3{B3_1, B3_2, B3_3}, C_2{B2_2, B2_3}, that is, the best beam in all beams changes from C_1{B1_1} to C_2{B2_1}, and the second best beam changes from C_1{B1_2} to C_1{B1_1}.

[0075] As can be seen, the order of beams within each candidate cell remains unchanged, but the order between candidate cells has changed. Since the network device determines the target cell for which the terminal device needs to handover, there is only one target cell, this information is crucial. In other words, after all beams in one or more cells that trigger a predetermined event are ordered, if the N beams with the best measurement results change, the terminal device can be triggered to send a measurement report, conveying the latest beam measurement results to the network device, thus enabling the network device to obtain the latest measurement results promptly.

[0076] Example 2

[0077] In Embodiment 2, the first condition includes a change in the M cells (i.e., the M optimal cells or M best cells) among the one or more cells that triggered the predetermined event, where M is a positive integer (e.g., M = 1 or M = 2). That is, if the M cells with the best measurement results among the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report to the network device. Since the measurement results of a cell can be determined based on the measurement results of one or more beams within that cell, or in other words, changes in the measurement results of beams within a cell lead to changes in the optimal cells, it can be considered that the first condition described in this embodiment is related to changes in the measurement results of the beams of the one or more cells that triggered the predetermined event.

[0078] When determining the M cells with optimal measurement results, in one implementation, the measurement result of each of the M cells can be determined based on the measurement result of the beam with the optimal measurement result in each cell; in another implementation, the measurement result of each of the M cells can be determined based on the measurement results of multiple beams in each cell. For example, the measurement result of each of the M cells can be the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value. This preset value can be configured by the network device or agreed upon in advance.

[0079] As an example, after performing L1 measurements in the LTM process, the terminal device can use the beam with the strongest signal in the cell to represent the signal strength of the cell, and then sort the cells to obtain the M cells with the best measurement results. Alternatively, the beam-level L1 signals in the candidate cells can be synthesized into a cell-level L1 signal (for example, the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value can be used as the measurement result of the cell), and then the cell-level L1 signal can be used to characterize the signal strength of the candidate cell.

[0080] Similarly, the phrase "cell change" refers, for example, to a change in the cell ranking after cells are sorted based on measurement results. For instance, the cell with the best measurement results (e.g., the cell with the best signal strength and / or signal quality) was originally cell 1, but after the terminal device sends a measurement report, it is found that the cell with the best measurement results has changed from cell 1 to cell 2; therefore, the cell with the best measurement results is considered to have changed. As another example, the cell with the second-best measurement results (e.g., the cell with the second-best signal strength and / or signal quality) was originally cell 3, but after the terminal device sends a measurement report, it is found that the cell with the second-best measurement results has changed from cell 3 to cell 4; therefore, the cell with the second-best measurement results is considered to have changed. Since the determination of the optimal cell is based on the measurement results of the beams within the cell, or in other words, the change in the measurement results of the beams within the cell leads to the change of the optimal cell, it can be considered that the first condition described in the embodiments of this application is related to the change in the measurement results of the beams of one or more cells that trigger a predetermined event.

[0081] Since the above discussion concerns the changes in the N beams and M beams with the best measurement results, the aforementioned changes require a reference benchmark, i.e., relative to which they are changing. Therefore, in some implementations, changes in the N beams include changes in the currently best N beams relative to the N beams with the best measurement results in historical measurement reports; changes in the M cells include changes in the currently best M cells relative to the M cells with the best measurement results in historical measurement reports. These historical measurement reports include measurement reports triggered by predetermined events (e.g., the most recent measurement report triggered by a predetermined event) and / or measurement reports triggered by a first condition (e.g., the most recent measurement report triggered by a first condition). In other words, since new cells may appear at any time, triggering predetermined events that lead to measurement reporting, and measurement reporting may also occur at any time due to the fulfillment of the first condition (e.g., changes in optimal beam transmission), if the N optimal beams determined based on the current measurement results have all changed compared to the N optimal beams in the measurement report previously triggered by the terminal device due to the fulfillment of the predetermined event, the terminal device can resend the measurement report to report the latest measurement results; or, if the N optimal beams determined based on the current measurement results have all changed compared to the N optimal beams in the measurement report previously triggered by the terminal device due to the fulfillment of the first condition, the terminal device can resend the measurement report to report the latest measurement results.

[0082] Using different sorting methods to sort beam measurement results may lead to different results. For example, if the measurement result of the best beam in a cell is used to represent the measurement result of that cell, then when the measurement result of the best beam in that cell is higher than the measurement results of the best beam in other cells, the terminal device will send a new measurement report. On the other hand, if the measurement result of a cell is represented by the average of the measurement results of multiple beams in that cell whose measurement results are higher than a preset value, then when the measurement result of the best beam in that cell is higher than the measurement results of the best beam in other cells, the terminal device may not trigger a new measurement report. For example, assuming N=1, if the sorting of the best beams of the three candidate cells that trigger the L1 event is C_1{B1_1, B1_2, B...}... 1_3}, C_2{B2_1, B2_2, B2_3}, C_3{B3_1, B3_2, B3_3} change to C_2{B2_1}, C_1{B1_1, B1_2, B1_3}, C_3{B3_1, B3_2, B3_3}, C_2{B2_2, B2_3}. Although C_2{B2_1} is the best beam among the three candidate cells, if the measurement results of C_2{B2_2} and C_2{B2_3} are low, resulting in the average value of the measurement results of C_2{B2_1}, C_2{B2_2} and C2{B2_3} still being low, so that the cell-level L1 measurement result is still C_1 greater than C_2, the terminal device will not trigger a new measurement report.

[0083] It is understood that the various possible implementations of the first condition described above can exist individually or simultaneously. For example, if the N beams with the best measurement results in any one of the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in all the beams of the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the M beams with the best measurement results in one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in any one of the one or more cells that triggered the predetermined event change, and the N beams with the best measurement results in all the beams of those one or more cells also change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in any one of the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in all the beams of those one or more cells change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in one of the one or more cells that triggered the predetermined event ... one of the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the N beams with the best measurement results in one of the one or more cells that triggered the predetermined event change, the terminal device sends a measurement report; or, if the N beams with the best measurement The terminal device sends a measurement report when the N best-performing beams in any one of the multiple cells change, and the M best-performing cells in the one or more cells also change; or, for example, when the N best-performing beams in all beams of one or more cells that trigger a predetermined event change, and the M best-performing cells in the one or more cells also change, the terminal device sends a measurement report; or, for example, when the N best-performing beams in any one of the one or more cells that trigger a predetermined event change, and the N best-performing beams in all beams of the one or more cells also change, and the M best-performing cells in the one or more cells also change, the terminal device sends a measurement report.

[0084] In some implementations, in step 410, if the first condition is met and continues for a predetermined duration, the terminal device sends a measurement report to the network device. This predetermined duration can be implemented, for example, using a TTT timer. Considering that the measurement results of the L1 beam may fluctuate significantly in a short period, a timer, such as one similar to a TTT timer, can be set to prevent frequent transmission of measurement reports. This timer starts when the first condition is met. If, during the timer's operation, the order of the N best beams or M best cells returns to its state before the timer was triggered, the timer can stop. The terminal device only triggers the reporting of the measurement report when the timer expires.

[0085] As an example, assuming N=1, the timer is started when the N optimal beams in a cell change. For instance, if the beam order in cell C_2 changes from C_2{B2_1, B2_2, B2_3} to C_2{B2_2, B2_1, B2_3}, the timer is started. If, during the timer's operation, the beam order in cell C_2 changes back from C_2{B2_2, B2_1, B2_3} to C_2{B2_1, B2_2, B2_3}, meaning the optimal beams have returned to their original order, then the timer stops. If, during the timer's operation, the beam order in cell C_2 changes from C_2{B2_2, B2_1, B2_3} to C_2{B2_3, B2_2, B2_1}, meaning the optimal beams have changed again, then the timer is restarted.

[0086] The aforementioned measurement reporting triggered by the first condition can be independent of periodicity; that is, as long as the first condition is met, a new measurement report is sent when the first condition is met. In other implementations, the measurement report can also be sent based on a predetermined period. However, at the reporting time determined based on the predetermined period, the terminal device needs to determine whether the first condition is met. That is, in step 410, when the reporting time is reached and the first condition is met, the terminal device sends a measurement report to the network device at that reporting time. As an example, assuming the predetermined period is ΔT, and the measurement report is triggered by a predetermined event at time T0, then at each time T1, T2, T3, ..., Tn, where time T1 = T0 + ΔT, time T2 = T0 + 2ΔT, time T3 = T0 + 3ΔT, ..., time Tn = T0 + nΔT, the terminal device needs to determine whether the first condition is met. If the first condition is met at a certain reporting time, the terminal device sends a measurement report at that reporting time. If the first condition is not met at that reporting time, the terminal device will not send a measurement report at that reporting time, i.e., skip that reporting time. For example, if the first condition is met at time T1, a measurement report is sent at time T1; if the first condition is not met at time T1, a measurement report is not sent at time T1. Then, at time T2, it is determined whether the first condition is met. If the first condition is met at time T2, a measurement report is sent at time T2; if the first condition is not met at time T2, a measurement report is not sent at time T2. Other reporting times are similar.

[0087] The measurement report sent by the terminal device to the network device in step 410 may include, for example, the measurement results of the beams in the cells corresponding to the beams whose measurement results changed in one or more cells that triggered the predetermined event, and / or the measurement results of the beams in the one or more cells. As an example, the measurement report should at least include information about the cells corresponding to the beams whose measurement results changed, and the measurement results of the beams whose measurement results changed within those cells; further, the measurement report may include information about the cells corresponding to the beams whose measurement results changed, and the measurement results of all beams within those cells; even further, the measurement report may include information about one or more cells that triggered the predetermined event, and the measurement results of all beams within those cells.

[0088] 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 in detail 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.

[0089] Figure 5 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. The terminal device 500 shown in Figure 5 may include a transceiver unit 510. The transceiver unit 510 is used to send a measurement report to a network device when a first condition is met, wherein the first condition is associated with changes in the measurement results of beams of one or more cells that trigger a predetermined event.

[0090] In some implementations, the first condition includes: the N beams with the best measurement results in the one or more cells change; and / or the M cells with the best measurement results in the one or more cells change; where M and N are positive integers.

[0091] In some implementations, the N beams are the N beams with the best measurement results in the same cell; or, the N beams are the N beams with the best measurement results among all the beams in the one or more cells.

[0092] In some implementations, the measurement result of each of the M cells is determined based on the measurement result of the beam with the best measurement result in each cell; or, the measurement result of each cell is determined based on the measurement results of multiple beams in each cell.

[0093] In some implementations, the measurement result of each cell is determined based on the measurement results of multiple beams in each cell, including: the measurement result of each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

[0094] In some implementations, the change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement report; the change of the M cells includes a change in the M cells with the best current measurement results relative to the M cells with the best measurement results in the historical measurement report; wherein, the historical measurement report includes a measurement report triggered by the predetermined event and / or a measurement report triggered by the first condition.

[0095] In some implementations, the transceiver unit 510 is specifically used to: send the measurement report to the network device when the first condition is met and continues for a predetermined duration.

[0096] In some implementations, the reporting time of the measurement report is determined based on a predetermined period, and the transceiver unit 510 is specifically used to: send the measurement report to the network device at the reporting time when the reporting time is reached and the first condition is met.

[0097] In some implementations, the measurement report includes: the measurement results of the beams in the cells corresponding to the beams in the one or more cells where the measurement results have changed; and / or, the measurement results of the beams in the one or more cells.

[0098] In some implementations, the transceiver unit 510 is further configured to: receive information about the first condition sent by the network device.

[0099] In some implementations, the measurement result is the Layer 1 measurement result in the LTM process.

[0100] It is understood that the transceiver unit 510 may be, for example, a transceiver 730. Additionally, the terminal device 500 may optionally include a processor 710 and a memory 720, as shown in Figure 7.

[0101] Figure 6 is a schematic diagram of the structure of a network device provided in an embodiment of this application. The network device 600 shown in Figure 6 may include a transceiver unit 610. The transceiver unit 610 is used to send information about a first condition to a terminal device, wherein the first condition is used to trigger the terminal device to send a measurement report to the network device, and the first condition is associated with changes in the measurement results of the beams of one or more cells that trigger a predetermined event.

[0102] In some implementations, the first condition includes: the N beams with the best measurement results in the one or more cells change; and / or the M cells with the best measurement results in the one or more cells change; where M and N are positive integers.

[0103] In some implementations, the N beams are the N beams with the best measurement results in the same cell; or, the N beams are the N beams with the best measurement results among all the beams in the one or more cells.

[0104] In some implementations, the measurement result of each of the M cells is determined based on the measurement result of the beam with the best measurement result in each cell; or, the measurement result of each cell is determined based on the measurement results of multiple beams in each cell.

[0105] In some implementations, the measurement result of each cell is determined based on the measurement results of multiple beams in each cell, including: the measurement result of each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

[0106] In some implementations, the change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement report; the change of the M cells includes a change in the M cells with the best current measurement results relative to the M cells with the best measurement results in the historical measurement report; wherein, the historical measurement report includes a measurement report triggered by the predetermined event and / or a measurement report triggered by the first condition.

[0107] In some implementations, the measurement report includes: the measurement results of the beams in the cells corresponding to the beams in the one or more cells where the measurement results have changed; and / or, the measurement results of the beams in the one or more cells.

[0108] In some implementations, the measurement result is the Layer 1 measurement result in the LTM process.

[0109] It is understood that the transceiver unit 610 may be, for example, a transceiver 630. Additionally, the network device 600 may optionally include a processor 710 and a memory 720, as detailed in Figure 7.

[0110] Figure 7 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 7 indicate that the unit or module is optional. The apparatus 700 can be used to implement the methods described in the above method embodiments. The apparatus 700 may be, for example, a chip, a terminal device, or a network device.

[0111] The apparatus 700 may include one or more processors 710. The processors 710 may support the apparatus 700 in implementing the methods described in the foregoing method embodiments. The processor 710 may be a general-purpose processor or a special-purpose processor. For example, the processor 710 may be a central processing unit (CPU). Alternatively, the processor 710 may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0112] The apparatus 700 may further 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 above method embodiments. The memories 720 may be independent of the processor 710, or they may be integrated into the processor 710.

[0113] 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.

[0114] This application also provides a communication system. The communication system includes the terminal device and network device described above. In some implementations, the system further includes other devices that interact with the terminal device and network device.

[0115] 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, and the program causes a computer to execute the methods performed by the terminal device or network device in various embodiments of this application.

[0116] 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 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.

[0117] 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 the various embodiments of this application.

[0118] It should be understood that the terms "system" and "network" in the embodiments of this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of this application and is not intended to limit this application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0119] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0120] 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.

[0121] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0122] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0123] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0124] In the embodiments of this application, the term "and / or" 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 document generally indicates that the preceding and following related objects have an "or" relationship.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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 can 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)).

[0130] 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 for wireless communication, characterized in that, include: If a first condition is met, the terminal device sends a measurement report to the network device, wherein the first condition is associated with changes in the measurement results of the beams of one or more cells that trigger a predetermined event.

2. The method according to claim 1, characterized in that, The first condition includes: The N beams with the best measurement results in one or more cells change; and / or, The M cells with the best measurement results among the one or more cells change; Where M and N are positive integers.

3. The method according to claim 2, characterized in that, The N beams are the N beams with the best measurement results in the same cell; or, The N beams are the N beams with the best measurement results among all beams in the one or more cells.

4. The method according to claim 2 or 3, characterized in that, The measurement results of each of the M cells are determined based on the measurement results of the beam with the best measurement results in each cell; or, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell.

5. The method according to claim 4, characterized in that, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell, including: The measurement result for each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

6. The method according to any one of claims 2 to 5, characterized in that, The change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement reports; The changes in the M cells include changes in the M cells with the best current measurement results compared to the M cells with the best measurement results in the historical measurement reports; The historical measurement report includes measurement reports triggered by the predetermined event and / or measurement reports triggered by the first condition.

7. The method according to any one of claims 1 to 6, characterized in that, When the first condition is met, the terminal device sends a measurement report to the network device, including: If the first condition is met and continues for a predetermined duration, the terminal device sends the measurement report to the network device.

8. The method according to any one of claims 1 to 7, characterized in that, The reporting time of the measurement report is determined based on a predetermined period, wherein, when the first condition is met, the terminal device sends the measurement report to the network device, including: When the reporting time is reached and the first condition is met, the terminal device sends the measurement report to the network device at the reporting time.

9. The method according to any one of claims 1 to 8, characterized in that, The measurement report includes: The measurement results of the beams corresponding to the beams in the one or more cells where the measurement results change; and / or, Measurement results of beams in one or more cells.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: The terminal device receives the information of the first condition sent by the network device.

11. The method according to any one of claims 1 to 10, characterized in that, The measurement results are the Layer 1 measurement results in the Layer 1 / Layer 2 triggered mobility LTM process.

12. A method for wireless communication, characterized in that, include: The network device sends information about a first condition to the terminal device, wherein the first condition is used to trigger the terminal device to send a measurement report to the network device, and the first condition is associated with changes in the measurement results of the beams of one or more cells that trigger a predetermined event.

13. The method according to claim 12, characterized in that, The first condition includes: The N beams with the best measurement results in one or more cells change; and / or, The M cells with the best measurement results among the one or more cells change; Where M and N are positive integers.

14. The method according to claim 13, characterized in that, The N beams are the N beams with the best measurement results in the same cell; or, The N beams are the N beams with the best measurement results among all beams in the one or more cells.

15. The method according to claim 13 or 14, characterized in that, The measurement results of each of the M cells are determined based on the measurement results of the beam with the best measurement results in each cell; or, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell.

16. The method according to claim 15, characterized in that, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell, including: The measurement result for each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

17. The method according to any one of claims 13 to 16, characterized in that, The change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement reports; The changes in the M cells include changes in the M cells with the best current measurement results compared to the M cells with the best measurement results in the historical measurement reports; The historical measurement report includes measurement reports triggered by the predetermined event and / or measurement reports triggered by the first condition.

18. The method according to any one of claims 12 to 17, characterized in that, The measurement report includes: The measurement results of the beams corresponding to the beams in the one or more cells where the measurement results change; and / or, Measurement results of beams in one or more cells.

19. The method according to any one of claims 12 to 18, characterized in that, The measurement results are the Layer 1 measurement results in the Layer 1 / Layer 2 triggered mobility LTM process.

20. A terminal device, characterized in that, include: A transceiver unit is configured to send a measurement report to a network device when a first condition is met, wherein the first condition is associated with a change in the measurement results of the beams of one or more cells that trigger a predetermined event.

21. The terminal device according to claim 20, characterized in that, The first condition includes: The N beams with the best measurement results in one or more cells change; and / or, The M cells with the best measurement results among the one or more cells change; Where M and N are positive integers.

22. The terminal device according to claim 21, characterized in that, The N beams are the N beams with the best measurement results in the same cell; or, The N beams are the N beams with the best measurement results among all beams in the one or more cells.

23. The terminal device according to claim 21 or 22, characterized in that, The measurement results of each of the M cells are determined based on the measurement results of the beam with the best measurement results in each cell; or, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell.

24. The terminal device according to claim 23, characterized in that, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell, including: The measurement result for each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

25. The terminal device according to any one of claims 21 to 24, characterized in that, The change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement reports; The changes in the M cells include changes in the M cells with the best current measurement results compared to the M cells with the best measurement results in the historical measurement reports; The historical measurement report includes measurement reports triggered by the predetermined event and / or measurement reports triggered by the first condition.

26. The terminal device according to any one of claims 20 to 25, characterized in that, The transceiver unit is specifically used for: If the first condition is met and continues for a predetermined duration, the measurement report is sent to the network device.

27. The terminal device according to any one of claims 20 to 26, characterized in that, The reporting time of the measurement report is determined based on a predetermined period, and the transceiver unit is specifically used for: If the reporting time is reached and the first condition is met, the measurement report is sent to the network device at the reporting time.

28. The terminal device according to any one of claims 20 to 27, characterized in that, The measurement report includes: The measurement results of the beams corresponding to the beams in the one or more cells where the measurement results change; and / or, Measurement results of beams in one or more cells.

29. The terminal device according to any one of claims 20 to 28, characterized in that, The transceiver unit is also used for: Receive the information of the first condition sent by the network device.

30. The terminal device according to any one of claims 20 to 29, characterized in that, The measurement results are the Layer 1 measurement results in the Layer 1 / Layer 2 triggered mobility LTM process.

31. A network device, characterized in that, include: The transceiver unit is configured to send information about a first condition to the terminal device, wherein the first condition is used to trigger the terminal device to send information to the terminal device. The network device sends a measurement report, wherein the first condition is associated with changes in the measurement results of the beams of one or more cells that trigger a predetermined event.

32. The network device according to claim 31, characterized in that, The first condition includes: The N beams with the best measurement results in one or more cells change; and / or, The M cells with the best measurement results among the one or more cells change; Where M and N are positive integers.

33. The network device according to claim 32, characterized in that, The N beams are the N beams with the best measurement results in the same cell; or, The N beams are the N beams with the best measurement results among all beams in the one or more cells.

34. The network device according to claim 32 or 33, characterized in that, The measurement results of each of the M cells are determined based on the measurement results of the beam with the best measurement results in each cell; or, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell.

35. The network device according to claim 34, characterized in that, The measurement results for each cell are determined based on the measurement results of multiple beams in each cell, including: The measurement result for each cell is the average of the measurement results of multiple beams in each cell whose measurement results are higher than a preset value.

36. The network device according to any one of claims 32 to 35, characterized in that, The change of the N beams includes a change in the N beams with the best current measurement results relative to the N beams with the best measurement results in the historical measurement reports; The changes in the M cells include changes in the M cells with the best current measurement results compared to the M cells with the best measurement results in the historical measurement reports; The historical measurement report includes measurement reports triggered by the predetermined event and / or measurement reports triggered by the first condition.

37. The network device according to any one of claims 31 to 36, characterized in that, The measurement report includes: The measurement results of the beams corresponding to the beams in the one or more cells where the measurement results change; and / or, Measurement results of beams in one or more cells.

38. The network device according to any one of claims 31 to 37, characterized in that, The measurement results are the Layer 1 measurement results in the Layer 1 / Layer 2 triggered mobility LTM process.

39. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method according to any one of claims 1 to 11.

40. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method according to any one of claims 12 to 19.

41. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method according to any one of claims 1 to 19.

42. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method according to any one of claims 1 to 19.

43. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method according to any one of claims 1 to 19.

44. A computer program product, characterized in that, Includes a program that causes a computer to perform the method according to any one of claims 1 to 19.

45. A computer program, characterized in that, The computer program causes the computer to perform the method according to any one of claims 1 to 19.

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