Cell handover method, information processing method, communication device, storage medium, chip system, computer program product, and communication system

Abstract

The cell switching method, the information processing method, the communication device, the storage medium, the chip system, the computer program product and the communication system provided by the embodiments of the present application relate to the technical field of communication. The method can be applied to a terminal device, and the method comprises: receiving first information from a first access network device, and performing cell switching according to the first information. Since the first information can be used to indicate that at least two of the first mode, the second mode or the third mode coexist, and cell switching is performed according to the second information, and the second information can be used to indicate information related to the switching priority of the first mode, the second mode and the third mode, the cell switching in the case of coexistence of at least two switching modes is realized. The first mode is CLTM triggered based on a layer 1 measurement event, the second mode is CLTM triggered based on a layer 3 measurement event, and the third mode is CHO.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to cell handover methods, information processing methods, communication devices, storage media, chip systems, computer program products, and communication systems. Background Technology

[0002] With the continuous development of communication technology, cell handover methods are becoming increasingly sophisticated. For example, cell handover methods can include at least one of the following: CHO (conditional handover), LTM (layer 1 / 2 triggered mobility), or CLTM (conditional layer 1 / 2 triggered mobility). Layer 1 can refer to the physical layer (PHY). Layer 2 can refer to the data link layer (DLL). LTM can also be called lower-layer triggered mobility, lower-layer triggered mobility, or execution-layer triggered mobility, etc.

[0003] In related technologies, how to achieve cell handover when at least two handover methods coexist is an urgent problem to be solved. Summary of the Invention

[0004] This application provides a cell handover method, an information processing method, a communication device, a storage medium, a chip system, a computer program product, and a communication system, which are applied in the field of communication technology to realize cell handover in the case of at least two handover methods coexisting and improve the handover success rate.

[0005] In a first aspect, embodiments of this application provide a cell handover method, which can be applied to a terminal device. The method may include: receiving first information from a first access network device; and performing cell handover based on the first information.

[0006] The first information can be used to indicate that, in the event that at least two of the first, second, or third modes coexist, cell handover shall be performed based on the second information. The second information can be used to indicate information related to the handover priority of the first, second, and third modes.

[0007] The first approach can be a CLTM triggered by a first event. The second approach can be a CLTM triggered by a second event. The third approach can be a conditional toggle CHO. The first event can be a layer 1 measurement event. The second event can be a layer 3 measurement event.

[0008] According to the embodiments of this application, since the second information can be used to indicate information related to the handover priority of the first method, the second method and the third method, and the first information can be used to indicate that when at least two of the first method, the second method or the third method coexist, cell handover is performed according to the second information. Therefore, cell handover is realized when at least two handover methods coexist.

[0009] In one possible implementation, the first information can be carried in an RRC reconfiguration message.

[0010] In one possible implementation, the second information can be used to indicate that, in the first case, the handover priority corresponding to the second method is the highest. Alternatively, if cell handover using the second method fails N times, cell handover is performed using the first method. The first case can be used to indicate that there is at least one first result, at least one second result, and no third result. N can be an integer greater than or equal to 1. And / or

[0011] In the second scenario, the handover priority corresponding to the third method is the highest. Alternatively, if the cell handover fails N times using the third method, another method may be used. The second scenario can indicate the existence of at least one third result and at least one of the following: at least one first result or at least one second result. If at least one first result exists, the other method can be the first method. If at least one second result exists, the other method can be the second method. If at least one first result exists and at least one second result exists, the other method can be either the first method or the second method.

[0012] The first result can satisfy the triggering condition of the first method. The second result can satisfy the triggering condition of the second method. The third result can satisfy the triggering condition of the third method.

[0013] Since the first method is CLTM triggered by layer 1 measurement events, the second method is CLTM triggered by layer 3 measurement events, and the third method is CHO, CHO can be a handover method based on layer 3 measurement events. The robustness of layer 3 measurement results can be better than that of layer 1 measurement results, and the robustness of CHO can be better than that of CLTM. Higher robustness can improve the handover success rate, improve anti-interference ability, and expand scenario compatibility. Therefore, from the perspective of the robustness of measurement results, the handover priority can be configured from high to low as the third method → ​​the second method → ​​the first method.

[0014] Based on this, since the first case can be used to indicate the existence of at least one first result, at least one second result, and no third result, where the first result can be a trigger condition satisfying the first method, the second result can be a trigger condition satisfying the second method, and the third result can be a trigger condition satisfying the third method, therefore, in the first case, the switching priority corresponding to the second method is determined to be the highest. Since the second case can be used to indicate the existence of at least one third result and at least one of the following: the existence of at least one first result or the existence of at least one second result, therefore, in the second case, the switching priority corresponding to the third method is determined to be the highest.

[0015] Based on the above, cell handover can be achieved using either the second or third method when at least two of the first, second, or third methods coexist. Since the first and second methods are more robust, this improves the handover success rate and anti-interference capability, and expands scenario compatibility.

[0016] Furthermore, when cell handover fails N times using the highest priority handover method, using other methods to perform cell handover improves the handover success rate.

[0017] In one possible implementation, the first information may include second information, fourth information, and third information corresponding to at least one second cell. The second cell may be a candidate cell. The third information may include at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information may be configuration information corresponding to a first method. The second configuration information is configuration information corresponding to a second method. The third configuration information is configuration information indicating a third method. The fourth information may include at least two of the following: a trigger condition corresponding to a first method, a trigger condition corresponding to a second method, or a trigger condition corresponding to a third method.

[0018] In one possible implementation, performing cell handover based on the first information may include: determining at least one fourth result corresponding to each of the at least one second cell based on the fourth information and the third information corresponding to each of the at least one second cell; determining a target second cell from the at least one second cell based on the second information and the at least one fourth result corresponding to each of the at least one second cell; and handover from the first cell to the target second cell.

[0019] The fourth result corresponding to the second cell can be used to indicate whether the fifth result corresponding to the handover mode meets the triggering condition corresponding to the handover mode. The handover mode can be a handover mode supported by the second cell. The handover mode can be used to indicate at least one of the following: a first mode, a second mode, or a third mode. The fifth result can be obtained by measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell, that is, the fifth measurement result can be obtained by measuring the first signal quality based on the third information corresponding to the first cell. Optionally, the fifth measurement result can be obtained by measuring the second signal quality based on the third information corresponding to the first cell. Optionally, the fifth measurement result can be obtained by measuring the first signal quality and the second signal quality based on the third information corresponding to the first cell.

[0020] The first signal quality can be the signal quality of the first measurement object. The first measurement object can include a second cell or a first beam. The first beam can be a beam used to indicate the second cell. The second signal quality can be the signal quality of the second measurement object. The second measurement object can include a first cell or a second beam. The second beam can be a beam used to indicate the first cell. The first cell can be the original cell.

[0021] The first result can be the fourth result if the first condition is met. The first condition can be the fifth result corresponding to the first method satisfying the triggering condition corresponding to the first method. The second result can be the fourth result if the second condition is met. The second condition can be the fifth result corresponding to the second method satisfying the triggering condition corresponding to the second method. The third result can be the fourth result if the third condition is met. The third condition can be the fifth result corresponding to the third method satisfying the triggering condition corresponding to the third method.

[0022] Since the target second cell can be determined from at least one second cell based on second information and at least one fourth result corresponding to each of the at least one second cell, and the second information indicates that in the first case, the handover priority corresponding to the second method is the highest, and in the second case, the handover priority corresponding to the third method is the highest, the robustness of the measurement results obtained based on the second method and the robustness of the measurement results obtained based on the third method are both high. Therefore, the accuracy of determining the target cell is improved, thereby improving the cell handover success rate. Furthermore, if cell handover fails N times using the highest priority handover method, using other methods to perform cell handover improves the handover success rate.

[0023] In one possible implementation, determining a target second cell from at least one second cell based on second information and at least one fourth result corresponding to each of the at least one second cell may include: if at least one fourth result corresponding to each of the at least one second cell satisfies a first condition, determining the target second cell from the second cells corresponding to each of the at least one second result based on the second information. Alternatively, if handover from the first cell to the target second cell fails N times, determining the target second cell from the second cells corresponding to each of the at least one first result based on the second information.

[0024] If at least one fourth result corresponding to each of at least one second cell satisfies the second condition, a target second cell is determined from the second cells corresponding to each of at least one third result, based on the second information. Alternatively, if the handover from the first cell to the target second cell fails N times, a target second cell is determined from the second cells corresponding to each of at least one first result and / or the second cells corresponding to each of at least one second result, based on the second information.

[0025] Since the target second cell is determined based on either the first or second condition, the handover method is the second method when the first condition is met, and the handover method is the third method when the second condition is met. Both the measurement results obtained using the second method and those obtained using the third method have higher robustness, thus improving the accuracy of target cell determination and consequently increasing the cell handover success rate. Furthermore, even if the highest-priority handover method fails N times, using other methods to perform the handover further improves the handover success rate.

[0026] In one possible implementation, when the first measurement object can be a second cell and the second measurement object can be a first cell, the triggering condition corresponding to the second approach can include at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than a first threshold, or the second signal quality is less than the second threshold and the first signal quality is greater than a third threshold. The first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell. The third threshold can be greater than the second threshold. And / or

[0027] In one possible implementation, when the first measurement object is a first beam and the second measurement object is a second beam, the triggering condition corresponding to the first method may include at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than a fourth threshold, the first signal quality is greater than a fifth threshold, or the second signal quality is less than a sixth threshold and the first signal quality is greater than a seventh threshold. The seventh threshold may be greater than the sixth threshold.

[0028] In one possible implementation, when the first access network device operates in NES mode, the first method can be a first method corresponding to NES mode. And / or, the second method can be a second method corresponding to NES mode. And / or, the third method can be a third method corresponding to NES mode.

[0029] When the first access network device operates in NES mode, cell handover can be achieved when at least two of the first, second, or third modes of NES mode coexist, by configuring the first mode to be the first mode corresponding to NES mode, the second mode to be the second mode corresponding to NES mode, and the third mode to be the third mode corresponding to NES mode.

[0030] In one possible implementation, the terminal device may receive fifth information from the first access network device. The fifth information may include at least one of the following: a first mode corresponding to the NES mode, a second mode corresponding to the NES mode, or a third mode corresponding to the NES mode.

[0031] The terminal device can determine at least one fourth result corresponding to each of the at least one second cell based on the fifth information, the fourth information, and the third information corresponding to each of the at least one second cell.

[0032] In one possible implementation, the fifth piece of information can be carried in the DCI. The first field of the DCI can be configured as a first identifier. The first identifier can be used to indicate at least one of triggering a first mode corresponding to the NES mode, a second mode corresponding to the NES mode, or a third mode corresponding to the NES mode.

[0033] In another possible implementation, where the fifth information can be used to indicate that the first mode is a first mode corresponding to NES mode and / or the second mode is a second mode corresponding to NES mode, the fifth information can be an NES mode indicator. The second field included in the NES mode indicator can be configured as a second identifier. The second identifier can be used to indicate that the third mode is a third mode corresponding to NES mode.

[0034] By carrying the fifth information in the DCI or using the fifth information as an NES mode indication, cell handover based on the fifth information is enabled for NES mode.

[0035] In one possible implementation, the terminal device records sixth information in the event of radio link failure and / or cell handover failure.

[0036] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0037] Since the sixth information is obtained in the event of radio link failure or cell handover failure, it records the failure information. Furthermore, the sixth information may include at least one of the following: information related to measurement results, cell-related information, time-related information, information related to measurement events, or information related to TA (Transmission Action). Therefore, the sixth information provides relatively complete information, enabling the second access network device to optimize the network based on the sixth information and improve the success rate of subsequent handovers.

[0038] In one possible implementation, the seventh information may include at least one of the following: beam measurement results, measurement results corresponding to the first cell, measurement results corresponding to the second cell, or measurement results corresponding to a neighboring cell. The neighboring cell may be used to indicate the adjacent cells of the first cell. The beam measurement results may be obtained based on Layer 1 measurement events. The first cell may be the original cell. The second cell may be a candidate cell.

[0039] In one possible implementation, the eighth information may include at least one of the following: a third identifier, a fourth identifier, indication information as to whether the second cell supports the first and / or second modes, indication information as to whether the second cell supports CLTM, indication information as to whether a neighboring cell supports the first and / or second modes, indication information as to whether a neighboring cell supports CLTM, indication information as to whether the second cell supports a third-party mode, indication information as to whether a neighboring cell supports a third-party mode, whether a neighboring cell is configured with CG (configured grant, pre-configured grant or semi-static scheduling grant) resources, the type of the last handover, information of the second cell that meets the triggering conditions, information of the second cell that meets the triggering conditions corresponding to the first mode, or information of the second cell that meets the triggering conditions corresponding to the second mode. The third identifier may be used to indicate a cell where the handover failed. The fourth identifier may be used to indicate a cell that reconnected. The type of the last handover may include CLTM, the first mode, the second mode, or the third mode.

[0040] In one possible implementation, the ninth information may include at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration. The first duration may be the duration between a first time point and a second time point. The first time point may be the earliest time at which the triggering condition is satisfied, i.e., the first time point may be the time at which the triggering condition is assessed to be satisfied. The second time point may be the time at which cell handover fails or radio link fails. The second duration may be the duration between a third time point and a fourth time point. The third time point may be the time at which the first triggering condition corresponding to the first method is satisfied, i.e., the third time point may be the earliest time at which the first result is determined or the third time point may be the time at which the triggering condition corresponding to the first method is assessed to be satisfied. The fourth time point may be the time at which the first triggering condition corresponding to the second method is satisfied, i.e., the fourth time point may be the earliest time at which the second result is determined or the fourth time point may be the time at which the triggering condition corresponding to the second method is assessed to be satisfied. The third duration may be the duration between a fourth time point and a third time point. The fourth duration may be the duration between a third time point and a fifth time point. The fifth time point may be the time at which the second triggering condition corresponding to the first method is determined. The fifth duration may be the duration between a fourth time point and a sixth time point. The sixth moment can be the moment when the triggering condition corresponding to the second method is determined.

[0041] In one possible implementation, the tenth information may include at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, and the number of Layer 1 measurement events or the number of Layer 3 measurement events. The event type may include at least one of the following: a Layer 1 measurement event, a Layer 2 measurement event, or a Layer 3 measurement event. The event may include at least one of the following: event A3, event A4, event A5, event A3 corresponding to LTM, or event A5 corresponding to LTM. The Layer 1 measurement event may be a first event. The Layer 3 measurement event may be a second event.

[0042] In one possible implementation, the eleventh information may include at least one of the following: an indication of whether the TA of a neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration. The sixth duration may be the remaining duration of the TA of the neighboring cell or the remaining duration of the TA of the second cell. The seventh duration may be the remaining duration of the TA of the cell that failed the handover.

[0043] In one possible implementation, the cell handover method may further include: sending sixth information to a second access network device. The second access network device may be an access network device corresponding to the third cell or an access network device corresponding to the fourth cell. The third cell may be the cell where the handover failed. The fourth cell may be different from the third cell.

[0044] In one possible implementation, sending the sixth information to the second access network device may include: receiving a first request from the second access network device; and, in response to the first request, sending the sixth information to the second access network device.

[0045] Secondly, embodiments of this application provide a cell handover method. This method can be applied to a first access network device. The method may include: sending first information to a terminal device.

[0046] The first information can be used by the terminal device to perform cell handover based on the first information. The first information can also be used to indicate that, in the case of at least two of the first, second, or third modes coexisting, cell handover should be performed based on the second information.

[0047] The second information can be used to indicate information related to the handover priority of the first, second, and third methods. The first method can be a CLTM triggered by a first event. The second method can be a CLTM triggered by a second event. The third method can be a conditional handover CHO. The first event can be a Layer 1 measurement event. The second event can be a Layer 3 measurement event.

[0048] According to the embodiments of this application, since the second information can be used to indicate information related to the handover priority of the first mode, the second mode and the third mode, and the first information can be used to indicate that when at least two of the first mode, the second mode or the third mode coexist, cell handover is performed according to the second information, thus realizing cell handover when at least two handover modes coexist.

[0049] In one possible implementation, the second information can be used to indicate that, under the first condition, the handover priority corresponding to the second method is the highest. Alternatively, if cell handover using the second method fails N times, cell handover can be performed using the first method. The first condition can be used to indicate that there is at least one first result, at least one second result, and no third result. The first result can be a trigger condition satisfying the first method. The second result can be a trigger condition satisfying the second method. The third result can be a trigger condition satisfying the third method. N can be an integer greater than or equal to 1. And / or

[0050] In the second scenario, the handover priority corresponding to the third method is the highest. Alternatively, if the cell handover fails N times using the third method, another method may be used. The second scenario can indicate the existence of at least one third result and at least one of the following: at least one first result or at least one second result. If at least one first result exists, the other method can be the first method. If at least one second result exists, the other method can be the second method. If at least one first result exists and at least one second result exists, the other method can be either the first method or the second method.

[0051] In one possible implementation, the triggering condition corresponding to the second approach may include at least one of the following: a first signal quality is better than a second signal quality, the first signal quality is greater than a first threshold, or the second signal quality is less than a second threshold and the first signal quality is greater than a third threshold. The first signal quality may be the signal quality of a second cell. The second signal quality may be the signal quality of a first cell. The third threshold may be greater than the second threshold. And / or

[0052] The triggering condition corresponding to the first method may include at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than the fourth threshold, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold. The first signal quality may be the signal quality of the first beam.

[0053] The first beam can be used to indicate the beam of the second cell. The second signal quality can be the signal quality of the second beam.

[0054] The second beam can be used to indicate the beam of the first cell. The seventh threshold can be greater than the sixth threshold.

[0055] In one possible implementation, the first approach can be a first approach corresponding to the Network Energy Saving (NES) mode. And / or, the second approach can be a second approach corresponding to the NES mode. And / or, the third approach can be a third approach corresponding to the NES mode.

[0056] In one possible implementation, the first access network device may send fifth information to the terminal device. The fifth information may include at least one of the following: the first mode is a first mode corresponding to the NES mode, the second mode is a second mode corresponding to the NES mode, or the third mode is a third mode corresponding to the NES mode.

[0057] In one possible implementation, the fifth piece of information can be carried in the DCI. The first field of the DCI can be configured as a first identifier. The first identifier can be used to indicate at least one of triggering a first mode corresponding to the NES mode, a second mode corresponding to the NES mode, or a third mode corresponding to the NES mode.

[0058] In another possible implementation, where the fifth information can be used to indicate that the first mode is a first mode corresponding to NES mode and / or the second mode is a second mode corresponding to NES mode, the fifth information can be an NES mode indicator. The second field included in the NES mode indicator can be configured as a second identifier. The second identifier can be used to indicate that the third mode is a third mode corresponding to NES mode.

[0059] In one possible implementation, the first access network device may receive third information corresponding to at least one third access network device. First information is determined based on second information, fourth information, and the third information corresponding to each of the at least one third access network device.

[0060] The fourth piece of information may include at least two of the following: the triggering condition corresponding to the first method, the triggering condition corresponding to the second method, or the triggering condition corresponding to the third method.

[0061] The third information can be used to indicate at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information can be the configuration information corresponding to the first method. The second configuration information can be the configuration information corresponding to the second method. The third configuration information can be the configuration information corresponding to the third method. The third access network device can be the access network device corresponding to the second cell.

[0062] In one possible implementation, the first information can be carried in an RRC reconfiguration message.

[0063] Thirdly, embodiments of this application provide an information processing method that can be applied to a terminal device. This method may include: recording sixth information in the event of a radio link failure and / or cell handover failure.

[0064] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0065] According to embodiments of this application, since the sixth information is obtained in the event of radio link failure or cell handover failure, the sixth information records failure information. Furthermore, the sixth information may include at least one of the following: information related to measurement results, cell-related information, time-related information, information related to measurement events, or information related to TA (Transmission Action). Therefore, the information provided by the sixth information is relatively complete, enabling the second access network device to optimize the network based on the sixth information and improve the subsequent handover success rate.

[0066] In one possible implementation, the seventh information may include at least one of the following: beam measurement results, measurement results corresponding to the original cell, measurement results corresponding to a candidate cell, or measurement results corresponding to a neighboring cell. The neighboring cell may be used to indicate the adjacent cells of the original cell. The candidate cell may be a candidate cell configured for the original cell. The beam measurement results may be obtained based on Layer 1 measurement events.

[0067] In one possible implementation, the eighth information may include at least one of the following: a third identifier, a fourth identifier, indication information as to whether the candidate cell supports the first and / or second methods, indication information as to whether the candidate cell supports CLTM, indication information as to whether a neighboring cell supports the first and / or second methods, indication information as to whether a neighboring cell supports CLTM, indication information as to whether the candidate cell supports a third-party method, indication information as to whether a neighboring cell supports a third-party method, whether a neighboring cell is configured with CG resources, the type of the last handover, information on candidate cells that meet the triggering conditions, and information on candidate cells that meet the triggering conditions corresponding to the first method or the triggering conditions corresponding to the second method. The third identifier may be used to indicate a cell where the handover failed. The fourth identifier may be used to indicate a cell that reconnected. The type of the last handover may include CLTM, the first method, the second method, or the third method.

[0068] In one possible implementation, the ninth information may include at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration. The first duration may be the duration between a first time point and a second time point. The first time point may be the earliest time at which the triggering condition is satisfied, i.e., the first time point may be the time at which the triggering condition is assessed to be satisfied. The second time point may be the time at which cell handover fails or radio link fails. The second duration may be the duration between a third time point and a fourth time point. The third time point may be the time at which the first triggering condition corresponding to the first method is satisfied, i.e., the third time point may be the earliest time at which the first result is determined or the third time point may be the time at which the triggering condition corresponding to the first method is assessed to be satisfied. The fourth time point may be the time at which the first triggering condition corresponding to the second method is satisfied, i.e., the fourth time point may be the earliest time at which the second result is determined or the fourth time point may be the time at which the triggering condition corresponding to the second method is assessed to be satisfied. The third duration may be the duration between a fourth time point and a third time point. The fourth duration may be the duration between a third time point and a fifth time point. The fifth time point may be the time at which the second triggering condition corresponding to the first method is determined. The fifth duration may be the duration between a fourth time point and a sixth time point. The sixth moment can be the moment when the triggering condition corresponding to the second method is determined.

[0069] In one possible implementation, the tenth information may include at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, and the number of Layer 1 measurement events or the number of Layer 3 measurement events. The event type may include at least one of the following: a Layer 1 measurement event, a Layer 2 measurement event, or a Layer 3 measurement event. The event may include at least one of the following: event A3, event A4, event A5, event A3 corresponding to LTM, or event A5 corresponding to LTM. The Layer 1 measurement event may be a first event. The Layer 3 measurement event may be a second event.

[0070] In one possible implementation, the eleventh information may include at least one of the following: an indication of whether the TA of a neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration. The sixth duration may be the remaining duration of the TA of a neighboring cell or the remaining duration of the TA of a candidate cell. The seventh duration may be the remaining duration of the TA of the cell that failed the handover.

[0071] In one possible implementation, the cell handover method may further include: sending sixth information to a second access network device. The second access network device may be an access network device corresponding to the third cell or an access network device corresponding to the fourth cell. The third cell may be the cell where the handover failed. The fourth cell may be different from the third cell.

[0072] In one possible implementation, the cell handover method may include sending sixth information to a second access network device. The second access network device may be an access network device corresponding to a third cell or an access network device corresponding to a fourth cell. The third cell may be a cell where handover failed. The fourth cell may be different from the third cell. The sixth information may be obtained by the terminal device in the event of radio link failure and / or cell handover failure. The sixth information may include at least one of the following: seventh information, eighth information, ninth information, tenth information, or eleventh information.

[0073] In one possible implementation, sending the sixth information to the second access network device may include: receiving a first request from the second access network device; and, in response to the first request, sending the sixth information to the second access network device.

[0074] Fourthly, embodiments of this application provide an information processing method that can be applied to a second access network device. The method may include: receiving sixth information from a terminal device.

[0075] The sixth piece of information may be obtained by the terminal device in the event of a radio link failure and / or cell handover failure. The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information.

[0076] The seventh piece of information can be used to indicate information related to the measurement results. The eighth piece of information can be used to indicate information related to the cell. The ninth piece of information can be used to indicate time-related information. The tenth piece of information can be used to indicate information related to the measurement event. The eleventh piece of information can be used to indicate information related to TA (Translation and Transaction).

[0077] In one possible implementation, the seventh information may include at least one of the following: beam measurement results, measurement results corresponding to the original cell, measurement results corresponding to a candidate cell, or measurement results corresponding to a neighboring cell. The neighboring cell may be used to indicate the adjacent cells of the original cell. The candidate cell may be a candidate cell configured for the original cell. The beam measurement results may be obtained based on Layer 1 measurement events.

[0078] In one possible implementation, the eighth information may include at least one of the following: a third identifier, a fourth identifier, indication information as to whether the candidate cell supports the first and / or second methods, indication information as to whether the candidate cell supports CLTM, indication information as to whether a neighboring cell supports the first and / or second methods, indication information as to whether a neighboring cell supports CLTM, indication information as to whether the candidate cell supports a third-party method, indication information as to whether a neighboring cell supports a third-party method, whether a neighboring cell is configured with CG resources, the type of the last handover, information on candidate cells that meet the triggering conditions, and information on candidate cells that meet the triggering conditions corresponding to the first method or the triggering conditions corresponding to the second method. The third identifier may be used to indicate a cell where the handover failed. The fourth identifier may be used to indicate a cell that reconnected. The type of the last handover may include CLTM, the first method, the second method, or the third method.

[0079] In one possible implementation, the ninth information may include at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration. The first duration may be the duration between a first time point and a second time point. The first time point may be the earliest time at which the triggering condition is satisfied, i.e., the first time point may be the time at which the triggering condition is assessed to be satisfied. The second time point may be the time at which cell handover fails or radio link fails. The second duration may be the duration between a third time point and a fourth time point. The third time point may be the time at which the first triggering condition corresponding to the first method is satisfied, i.e., the third time point may be the earliest time at which the first result is determined or the third time point may be the time at which the triggering condition corresponding to the first method is assessed to be satisfied. The fourth time point may be the time at which the first triggering condition corresponding to the second method is satisfied, i.e., the fourth time point may be the earliest time at which the second result is determined or the fourth time point may be the time at which the triggering condition corresponding to the second method is assessed to be satisfied. The third duration may be the duration between a fourth time point and a third time point. The fourth duration may be the duration between a third time point and a fifth time point. The fifth time point may be the time at which the second triggering condition corresponding to the first method is determined. The fifth duration may be the duration between a fourth time point and a sixth time point. The sixth moment can be the moment when the triggering condition corresponding to the second method is determined.

[0080] In one possible implementation, the tenth information may include at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, and the number of Layer 1 measurement events or the number of Layer 3 measurement events. The event type may include at least one of the following: a Layer 1 measurement event, a Layer 2 measurement event, or a Layer 3 measurement event. The event may include at least one of the following: event A3, event A4, event A5, event A3 corresponding to LTM, or event A5 corresponding to LTM. The Layer 1 measurement event may be a first event. The Layer 3 measurement event may be a second event.

[0081] In one possible implementation, the eleventh information may include at least one of the following: an indication of whether the TA of a neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration. The sixth duration may be the remaining duration of the TA of a neighboring cell or the remaining duration of the TA of a candidate cell. The seventh duration may be the remaining duration of the TA of the cell that failed the handover.

[0082] In one possible implementation, receiving the sixth information from the terminal device may include: sending a first request to the terminal device. The first request may be used to request the terminal device to send the sixth information to the second access network device. Then, the sixth information sent by the terminal device in response to the first request is received.

[0083] Fifthly, embodiments of this application provide a cell handover apparatus that can be deployed on a terminal device. The cell handover apparatus may include: a first receiving module for receiving first information from a first access network device; and a handover module for performing cell handover based on the first information.

[0084] The first information can be used to indicate that, in the event that at least two of the first, second, or third modes coexist, cell handover shall be performed based on the second information. The second information can be used to indicate information related to the handover priority of the first, second, and third modes.

[0085] The first approach can be a conditional low-level mobility CLTM triggered by a first event. The second approach can be a CLTM triggered by a second event. The third approach can be a conditional switching CHO. The first event can be a layer 1 measurement event. The second event can be a layer 3 measurement event.

[0086] Sixthly, embodiments of this application provide a cell handover device. This cell handover device can be deployed on a first access network device. The cell handover device may include a transmitting module for sending first information to a terminal device.

[0087] The first information can be used by the terminal device to perform cell handover based on the first information. The first information can also be used to indicate that, in the case of at least two of the first, second, or third modes coexisting, cell handover should be performed based on the second information.

[0088] The second information can be used to indicate information related to the handover priority of the first, second, and third modes. The first mode can be a conditional lower-layer mobility CLTM triggered by a first event. The second mode can be a CLTM triggered by a second event. The third mode can be a conditional handover CHO. The first event can be a Layer 1 measurement event. The second event can be a Layer 3 measurement event.

[0089] In a seventh aspect, embodiments of this application provide an information processing apparatus. This information processing apparatus can be deployed on a terminal device. The information processing apparatus may include a recording module for recording sixth information in the event of a radio link failure and / or cell handover failure.

[0090] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0091] Eighthly, embodiments of this application provide an information processing apparatus. This information processing apparatus can be deployed in a second access network device. The information processing apparatus may include: a second receiving module for receiving sixth information from a terminal device.

[0092] The sixth piece of information may be obtained by the terminal device in the event of a radio link failure and / or cell handover failure. The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information.

[0093] The seventh piece of information can be used to indicate information related to the measurement results. The eighth piece of information can be used to indicate information related to the cell. The ninth piece of information can be used to indicate time-related information. The tenth piece of information can be used to indicate information related to the measurement event. The eleventh piece of information can be used to indicate information related to TA (Translation and Transaction).

[0094] Ninthly, embodiments of this application provide a communication device including a processor and a memory. The memory stores computer execution instructions, and the processor executes the computer execution instructions stored in the memory to perform the cell handover method described in the first aspect or any implementable embodiment of the first aspect; or to perform the cell handover method described in the second aspect or any implementable embodiment of the second aspect; or to perform the information processing method described in the third aspect or any implementable embodiment of the third aspect; or to perform the information processing method described in the fourth aspect or any implementable embodiment of the fourth aspect.

[0095] Tenthly, embodiments of this application provide a computer-readable storage medium storing a computer program or instructions. When the computer program or instructions are executed on a processor, the processor performs the cell handover method described in the first aspect or any of the possible implementations of the first aspect; or performs the cell handover method described in the second aspect or any of the possible implementations of the second aspect; or performs the information processing method described in the third aspect or any of the possible implementations of the third aspect; or performs the information processing method described in the fourth aspect or any of the possible implementations of the fourth aspect.

[0096] Eleventhly, embodiments of this application provide a computer program product including a computer program, which, when run, causes a communication device to execute the cell handover method described in the first aspect or any of the implementable embodiments of the first aspect; or execute the cell handover method described in the second aspect or any of the implementable embodiments of the second aspect; or execute the information processing method described in the third aspect or any of the implementable embodiments of the third aspect; or execute the information processing method described in the fourth aspect or any of the implementable embodiments of the fourth aspect.

[0097] In a twelfth aspect, embodiments of this application provide a chip or chip system including at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a line. The at least one processor is used to run computer programs or instructions to execute the cell handover method described in the first aspect or any implementable embodiment of the first aspect; or to execute the cell handover method described in the second aspect or any implementable embodiment of the second aspect; or to execute the information processing method described in the third aspect or any implementable embodiment of the third aspect; or to execute the information processing method described in the fourth aspect or any implementable embodiment of the fourth aspect. The communication interface in the chip can be an input / output interface, pins, or circuits, etc.

[0098] In one possible implementation, the chip or chip system described above in the embodiments of this application further includes at least one memory, in which instructions are stored. The memory can be an internal storage unit of the chip, such as a register or cache, or it can be a storage unit of the chip itself (e.g., read-only memory, random access memory, etc.).

[0099] In a thirteenth aspect, embodiments of this application provide a communication system that may include a first cell handover device and a second cell handover device.

[0100] The first cell handover device can be used to execute the cell handover method described in the first aspect or any of the implementable embodiments of the first aspect. The second cell handover device can be used to execute the cell handover method described in the second aspect or any of the implementable embodiments of the second aspect.

[0101] The communication system may include a first information processing device and a second information processing device. The first information processing device may be used to execute the information processing method described in the third aspect or any of the implementable embodiments of the third aspect. The second information processing device may be used to execute the information processing method described in the fourth aspect or any of the implementable embodiments of the fourth aspect.

[0102] It should be understood that the second, fifth, sixth, ninth, tenth, eleventh, twelfth, and thirteenth aspects of the embodiments of this application correspond to the technical solution of the first aspect of the embodiments of this application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, and will not be described again here. The fourth, seventh, eighth, ninth, tenth, eleventh, twelfth, and thirteenth aspects of the embodiments of this application correspond to the technical solution of the third aspect of the embodiments of this application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, and will not be described again here. Attached Figure Description

[0103] Figure 1 A flowchart of cell handover process based on CHO provided for related technologies;

[0104] Figure 2 A flowchart of a CLTM-based cell handover method provided for related technologies;

[0105] Figure 3 This application provides a schematic diagram of the architecture of a communication system.

[0106] Figure 4 A schematic diagram illustrating the principle of the cell handover method provided in the embodiments of this application;

[0107] Figure 5This is a schematic diagram illustrating the handover priority of the cell handover method provided in the embodiments of this application;

[0108] Figure 6 A schematic diagram illustrating a priority switching method provided in an embodiment of this application;

[0109] Figure 7 A schematic diagram illustrating another switching priority provided in an embodiment of this application;

[0110] Figure 8 A flowchart illustrating a cell handover method provided in an embodiment of this application;

[0111] Figure 9 A flowchart illustrating another cell handover method provided in this application embodiment;

[0112] Figure 10 A flowchart illustrating an information processing method provided in an embodiment of this application;

[0113] Figure 11 A flowchart illustrating another cell handover method provided in this application embodiment;

[0114] Figure 12 A flowchart illustrating another cell handover method provided in this application embodiment;

[0115] Figure 13 A flowchart illustrating another information processing method provided in this application embodiment;

[0116] Figure 14 A flowchart illustrating another information processing method provided in this application embodiment;

[0117] Figure 15 A structural block diagram of a cell handover device provided in an embodiment of this application;

[0118] Figure 16 A structural block diagram of another cell handover device provided in an embodiment of this application;

[0119] Figure 17 A structural block diagram of an information processing device provided in an embodiment of this application;

[0120] Figure 18 A structural block diagram of another information processing apparatus provided in the embodiments of this application;

[0121] Figure 19 A structural block diagram of the communication device provided in the embodiments of this application;

[0122] Figure 20 This is a structural block diagram of the terminal device provided in the embodiments of this application;

[0123] Figure 21This is a schematic diagram of the structure of the access network device provided in an embodiment of this application. Detailed Implementation

[0124] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0125] To facilitate understanding of the embodiments of this application, the following points will be explained first.

[0126] I. In the embodiments of this application, "instruction" may include direct instruction, indirect instruction, explicit instruction, or implicit instruction. When describing a certain instruction information for indicating A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A, but does not mean that the instruction information necessarily carries A.

[0127] The information indicated by the instruction can be called the information to be indicated. In implementation, the methods for indicating the information to be indicated can be varied. For example, it can be indicated directly, either by indicating the information itself or by indicating its index. Optionally, it can also be indicated indirectly by indicating other information. There can be a relationship between the other information and the information to be indicated. Optionally, it can also be indicated for a portion of the information to be indicated, where the other portions can be known or otherwise agreed upon. For example, the instruction can be implemented by using a pre-agreed (e.g., protocol-defined) order of multiple pieces of information, thereby reducing the instruction overhead to some extent. Furthermore, common parts of multiple pieces of information can be identified and indicated uniformly to reduce the instruction overhead caused by individually indicating the same information.

[0128] Furthermore, the indication method can be any of the known methods, such as the indication methods described above and various combinations thereof. The information to be indicated may have other equivalent forms. The information to be indicated can be sent as a whole or divided into multiple word messages and sent separately. The sending period and / or timing of the sub-messages can be the same or different; this application does not limit this. The sending period and / or timing of the sub-messages can be predefined.

[0129] II. In the embodiments of this application, " / " can indicate that the objects before and after it are in an "or" relationship. For example, "A / B" can mean A or B. "And / or" can be used to describe three relationships between the related objects. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Here, A and B can be singular or plural.

[0130] III. In the embodiments of this application, "at least one" can refer to one or more. "More than one" can refer to two or more, for example, three, four or more. Similar expressions (e.g., at least one, at least one, etc.) are similar. "At least one of the following," "one or more of the following," or similar expressions can refer to any combination of these items, and can include only a single item or a combination of multiple items. For example, at least one of a, b, or c can represent a, b, or c; a and b; a and c; b and c; a, b, and c. Wherein, a, b, and c can be singular or plural.

[0131] IV. In the embodiments of this application, the various numerical designations are merely for descriptive convenience and are not intended to limit the scope of protection of the embodiments of this application. The magnitude of the sequence numbers involved in the embodiments of this application does not imply the order of execution; the execution order of each process should be determined by its function and internal logic. For example, the terms "first," "second," "third," "fourth," and other various terminology (if present) in the specification, claims, and drawings of the embodiments of this application can be used to distinguish similar objects, rather than necessarily to describe a specific order or sequence. Wherein, such terms can be interchanged where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein, and "first," "second," "third," "fourth," etc., are not necessarily different.

[0132] V. In the embodiments of this application, the words "exemplary," "example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "example," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of "exemplary," "example," or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0133] VI. In the embodiments of this application, "sending information / data" only indicates the direction of information / data transmission, including direct transmission via the device's communication interface (e.g., air interface, etc.). "Sending" can also be understood as the "output" of the module interface. "Sending" can include indirect transmission by the processing unit through the communication interface, that is, after the processing unit outputs information / data through the module interface, it is transmitted to the device's communication interface and then sent out. "Receiving information / data" only indicates the direction of information / data transmission, including direct reception via the communication interface. "Receiving" can also be understood as the "input" of the module interface. "Receiving information / data" can include indirect reception by the processing unit through the communication interface, that is, after the communication interface receives information / data, it is transmitted to the module interface of the processing unit and then input to the processing unit through that module interface.

[0134] "Sending information / data to... (e.g., a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information / data directly or indirectly to the terminal device. "Receiving information / data from... (e.g., a network device)" or "receiving information / or data from... (e.g., a network device)" can be understood as the source of the information being the network device. This can include receiving information / data directly or indirectly from the network device.

[0135] Furthermore, information / data may undergo necessary processing between the source and destination ends, such as format changes, but the destination end can understand the valid information / data from the source end. Similar statements in the embodiments of this application can be understood in a similar way, and will not be repeated here.

[0136] VII. In the embodiments of this application, "pre-configuration" may include pre-defined features, such as protocol definitions. "Pre-defined features" 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 various network elements). The embodiments of this application do not limit the specific implementation method.

[0137] 8. In the embodiments of this application, "storage" or "preservation" may refer to storage in one or more memories. The one or more memories may be separately configured or integrated into an encoder or decoder, processor, or communication device. Alternatively, some of the one or more memories may be separately configured, while others may be integrated into a decoder, processor, or communication device. The type of memory can be any form of storage medium, and the embodiments of this application do not limit this.

[0138] 9. In the embodiments of this application, the “protocol” may refer to standard protocols in the field of communication, such as fourth-generation (4G) network protocols, fifth-generation (5G) network protocols, New Radio (NR) protocols, 5G-A (i.e., 5G-Advanced) network protocols, sixth-generation (6G) network protocols, and related protocols applied to future communication systems. The embodiments of this application do not limit this.

[0139] 10. The embodiments of this application can be applied to a communication system, which may include at least two entities, wherein one entity needs to send transmission direction indication information, and the other entity needs to receive the indication information and determine the transmission direction within a certain period of time based on the indication information.

[0140] XI. In the embodiments of this application, "wireless communication" can be simply referred to as "communication". "Communication" can be described as "data transmission", "information transmission" or "transmission", etc. In the embodiments of this application, the communication device can also be referred to as a network element, entity or functional entity.

[0141] 12. In the embodiments of this application, the terms "comprising", "having", and any variations thereof are intended to cover non-exclusive protection. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to which steps or units are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, systems, or devices.

[0142] Thirteen, the arrows or boxes shown by dashed lines in the schematic diagrams of the accompanying drawings of the embodiments of this application may represent optional steps or optional modules.

[0143] 14. Unless otherwise specified or in case of logical conflict, the terms and / or descriptions of different embodiments of this application are consistent and can be referenced in each other. Technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0144] To facilitate understanding of the technical solutions in the embodiments of this application, some terms involved in the embodiments of this application will be explained below.

[0145] 1. The communication system can be 3GPP (3rd Generation Partnership Project) related 4G (4G) th Generation IV (fourth generation) communication system, 5G (5G) th Generation 5 (5th generation) communication system, 5G-A (i.e., 5G-Advanced), 6G (6G) th This application does not limit the scope to sixth-generation (6th generation) communication systems or future communication systems.

[0146] The communication system may include at least one of a terrestrial network (TN) or a non-terrestrial network (NTN). A terrestrial network may refer to a communication system deployed using terrestrial methods. For example, a terrestrial network may include a cellular network. A non-terrestrial network may refer to a communication network deployed using non-terrestrial methods. A non-terrestrial network may include at least one of the following: a satellite communication system or a high altitude platform system (HAPS).

[0147] The communication system may include network equipment and terminal equipment (TE). Network equipment may be devices with wireless transceiver capabilities. Network equipment may include radio access network (RAN) equipment (hereinafter referred to as access network equipment). In the embodiments of this application, the access network equipment and terminal equipment may be devices with communication functions in 4G communication systems, 5G communication systems, 5G-A communication systems, 6G communication systems, or future communication systems. There are no limitations on the shape or type of the access network equipment and terminal equipment in 6G and future communication systems. Furthermore, the radio access network may also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The radio access network may also be a communication system that integrates two or more of the above systems.

[0148] This application does not limit the application scenarios of the communication system. For example, the application scenarios may include at least one of the following: enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine type of communication (mMTC), eMBB+, URLLC+, mMTC+, immersive communication, ultra-large-scale connectivity, ubiquitous connectivity, artificial intelligence (AI) and communication convergence, or integrated sensing and communication (ISAC), etc.

[0149] 2. A communication protocol (or communications protocol) refers to the agreement that two parties must follow to complete communication or provide services; hereinafter referred to as a protocol. A protocol can specify at least one of the following: data format, transmission order, or error handling. A protocol stack can refer to the sum of protocols at each layer in a network. Protocols can include at least one of the following: wireless interface protocols, transport layer protocols, or application layer protocols. A protocol stack can include a wireless interface protocol stack.

[0150] The wireless interface protocol stack can include Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3). L1 can refer to the physical layer. L2 can refer to the data link layer. L2 can include at least one of the following: media access control (MAC) layer, radio link control (RLC) layer, packet data convergence protocol (PDCP) layer, or service data adaptation protocol (SDAP). L3 can include at least one of the following: radio resource control (RRC) layer or non-access stratum (NAS) layer. L1 can include at least one of the high-PHY or low-PHY layers. The high-PHY layer can refer to the functions of the high-PHY layer. High-PHY functions can include some of the functions of L1, which are closer to the MAC layer. As one implementation, high-PHY functions can include at least one of the following: forward error correction (FEC), encoding and decoding, modulation and demodulation, or scrambling, etc. The term "low physical layer" can refer to the functions of the low physical layer. Low physical layer functions can include another portion of the L1 functionality, which is closer to the radio frequency (RF) side. As one implementation, low physical layer functions can include at least one of the following: Fast Fourier Transform (FFT), Inverse Fast Fourier Transform (IFFT), digital beamforming, or filtering, etc.

[0151] The wireless interface protocol stack can include a user plane (UP) protocol stack and a control plane (CP) protocol stack. The user plane protocol stack refers to the protocol stack used for data transmission. The control plane protocol stack refers to the protocol stack used for control signaling transmission. As one implementation, the user plane protocol stack of an access network device can include the PHY layer, MAC layer, RLC layer, PDCP layer, and SDAP layer. The control plane protocol stack of an access network device can include the PHY layer, MAC layer, PLC layer, PDCP layer, and RRC layer.

[0152] 3. Access network equipment can be devices that provide wireless communication services. Access network equipment can be used to help terminal devices achieve wireless access.

[0153] In one possible scenario, the access network device can be a base station (BS), an evolved NodeB (eNB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a 6G communication system, a base station in a future communication system, a wireless relay node, a wireless backhaul node, or an access node in a WiFi system, etc. The base station can be a macro base station, a micro base station, a pico base station, a small cell, a relay station, a donor node, a balloon station, or a Radio Network Controller (RNC) in a CRAN scenario. Optionally, the access network device can also be a server, a wearable device, a vehicle, or an in-vehicle device, etc. For example, the access network device in a Vehicle to Everything (V2X) system can be a Roadside Unit (RSU). The access network device in this embodiment can be equipped with a communication module, circuit, or chip that performs corresponding communication functions. The access network device can also be configured with program instructions for performing corresponding communication functions and corresponding program instructions. The access network device in this application embodiment can also be a logical node, logical module, or software that can implement all or part of the functions of the access network device.

[0154] In another possible scenario, multiple access network devices collaborate to assist terminal devices in achieving wireless access, with each access network device implementing a portion of the base station's functions. The access network devices may include at least one of a central unit (CU), at least one distributed unit (DU), or at least one radio unit (RU). In one implementation, the RU may be included in an active antenna unit (AAU). In another implementation, the RU may be a TRP, a remote radio head (RRH), or other similar network element. The CU and DU can be configured separately or included in the same network element. For example, the CU and DU may be included in a base band unit (BBU). The CU and DU can communicate via a midhaul link. The BBU and core network devices can communicate via a backhaul link. The BBU and RU can communicate via a fronthaul link. The BBU and RU can be co-located or non-co-located.

[0155] In one possible implementation, the CU may include a CU-CP and a CU-UP. The CU-CP can be used to implement the CU's control plane functions. The CU-CP can interact with network elements in the core network equipment used to implement control plane functions. The CU-UP can be used to implement the CU's user plane functions.

[0156] The functions of the CU and DU can be configured according to business needs. For example, the functions of the CU or DU can be divided according to the functions of the protocol layers; that is, some protocol layer functions can be configured in the CU, and the remaining or all protocol layer functions can be configured in the DU. One implementation is to configure the functions of the protocol layers above the RLC layer in the CU, and the functions of the RLC layer and lower protocol layers in the DU. Another implementation is to configure the functions of the protocol layers above the RLC layer in the CU, and the functions of the High-PHY, MAC, and RLC layers in the DU. Yet another implementation is to configure some functions of the RLC layer and the functions of the protocol layers above the RLC layer in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer in the DU. Yet another implementation is to configure the functions of the High-PHY layer and the protocol layers above the High-PHY layer in the CU, and the functions of the Low-PHY layer in the DU, or the functions of the Low-PHY layer and the RF (radio frequency) functions in the DU. Yet another implementation is to configure the functions of the PHY layer and the protocol layers above the PHY layer in the CU, and the RF functions in the DU. Furthermore, the functions of CU or DU can be divided according to business type or other system requirements. As one implementation method, functions that need to meet lower latency requirements can be configured in DU, while functions that do not need to meet such latency requirements can be configured in CU. It is understood that the above functional division is merely an example and does not constitute a limitation on CU and DU.

[0157] The DU and RU can be co-located or separate. The DU and RU can exchange control plane and user plane information via a lower-layer split-control, user, and synchronization (LLS-CUS) interface through a fronthaul link. LLS-CUS may include an LLS-C interface providing the control plane and an LLS-U interface providing the user plane. In one implementation, the control plane may refer to real-time control between the DU and RU. In another implementation, the DU and RU can exchange management plane (MP) information via an LLS-M interface on the fronthaul link. The management plane may refer to non-real-time management operations between the DU and RU.

[0158] The DU and RU can work together to implement the PHY function. One implementation method is to configure the baseband function in the DU and the RF function in the RU. Another implementation method is to configure the High-PHY function in the DU and the Low-PHY function in the RU. Yet another implementation method is to configure the High-PHY function in the DU and the Low-PHY and RF functions in the RU.

[0159] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (i.e., open CU), DU can also be called O-DU (i.e., open DU), CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, the embodiments of this application use CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0160] In this application embodiment, the device for the access network device's function can be a server or a device capable of supporting the access network device in implementing that function, such as a chip system, chip, hardware circuit, software module, or a hardware circuit plus a software module. This device can be installed and used in conjunction with the access network device. This application embodiment does not limit the specific form of the access network device.

[0161] 4. Terminal equipment can be a device or module with corresponding communication functions. Terminal equipment can also be called user equipment (UE), access equipment, subscriber unit (SU), user station, mobile station, mobile station (MS), remote station, mobile terminal (MT), remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0162] Terminal devices include mobile phones, tablets, computers with wireless transceiver capabilities, mobile internet devices (MIDs), virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, mixed reality (MR) terminal devices, personal digital assistants (PDAs), customer premises equipment (CPEs), communication equipment mounted on high-altitude aircraft, drones, helicopters, airplanes, ships, robots, robotic arms, terminal devices in device-to-device (D2D) communication, terminal devices in vehicle external connections, terminal devices in industrial control, terminal devices in machine-type communication (MTC), terminal devices in the Internet of Things (IoT), terminal devices in autonomous driving, tactile terminal devices, in-vehicle terminal devices, terminal devices in remote medical care, and smart grids. This application does not limit the scope to terminal devices in various fields, including those related to grid systems, transportation safety, intelligent transportation, smart cities, smart homes, smart offices, wearable devices, transportation vehicles with wireless communication capabilities, communication modules, or terminal devices in communication systems evolved after 5G. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables. For example, wearable devices may include at least one of the following: head-mounted displays (HMDs), glasses, gloves, watches, clothing, or shoes. Wearable devices are portable devices worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices; they achieve powerful functions through software support, data interaction, and cloud interaction. Wearable smart devices in a broad sense include those that are feature-rich, large in size, and can perform all or part of their functions without relying on a smartphone, such as smartwatches or smart glasses, as well as those that focus on a specific type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets or smart jewelry for monitoring vital signs.For example, smart glasses may include at least one of the following: VR glasses or AR glasses, etc.

[0163] In the embodiments of this application, the device for the function of the terminal device can be the terminal device itself, or it can be any device that enables the terminal device to perform the function, such as a chip system, a chip, a hardware circuit, a software module, or a hardware circuit plus a software module. This device can be installed in the terminal device or used in conjunction with the terminal device. The embodiments of this application do not limit the specific form of the terminal device.

[0164] 5. The connected state (i.e., RRC_CONNECTED) can be the state in which the terminal device and the access network device establish stable signaling and data transmission.

[0165] 6. Radio link failure (RLF) can refer to a communication link failure between the terminal device and the access network device.

[0166] 7. Connected-state mobility management (CSMM) refers to the ability of a terminal device to seamlessly switch between different cells or beams to maintain a stable communication connection when the terminal device is in the RRC_CONNECTED state.

[0167] 8. A cell can be described from the perspective of resource management, mobility management, or service unit. A cell can be an area within the coverage of the wireless network of an access network device.

[0168] In this embodiment, different cells may correspond to the same or different access network devices. For example, the access network device corresponding to cell #1 and the access network device corresponding to cell #2 may be different access network devices. Optionally, the access network device corresponding to cell #1 and the access network device corresponding to cell #2 may be the same access network device.

[0169] 9. Handover (HO), Cell Handover, Beam Handover (BHO)

[0170] Handover can refer to the process by which a terminal device switches from one network node to another while moving. A network node can include at least one of a cell, a beam, or an access network device. Therefore, handover can include at least one of the following: cell handover or beam handover.

[0171] Cell handover refers to the process by which a terminal device switches from one cell to another while moving. The handover method can include at least one of the following: CHO, LTM, or CLTM. Beam handover refers to the process by which a terminal device switches from one beam to another while moving.

[0172] Depending on whether the source cell and the target cell belong to the same access network equipment, cell handover can include at least one of the following: intra-site handover or inter-site handover. Intra-site handover refers to the source cell (SC) and the target cell (TC) belonging to the same access network equipment. Inter-site handover refers to the source cell and the target cell belonging to different access network equipment. For explanations of source and target cells, please refer to the corresponding sections below; they will not be repeated here.

[0173] 10. Original cell, candidate cell (CC), target cell, serving cell (SC), neighbor cell (NC)

[0174] The original cell refers to the cell that provides service to the terminal device before the handover. The candidate cell refers to a cell that may become the target cell during the handover process. The target cell refers to the cell that provides service to the terminal device after the handover. The target cell can be the best cell determined from the candidate cells. The serving cell refers to the cell that currently provides service to the terminal device. Before and during the handover, the original cell can be the serving cell. After the handover, the target cell can be the serving cell.

[0175] A neighboring cell refers to a cell that is geographically adjacent to the serving cell and has overlapping radio signal coverage. When a terminal device is moving, it may switch from the serving cell to a neighboring cell to maintain communication continuity. Neighboring cells can include at least one of the following: co-frequency neighboring cells, inter-frequency neighboring cells, or inter-system neighboring cells. Neighboring cells can provide candidate cells for the serving cell. A candidate cell can be a cell among at least one neighboring cell whose signal quality meets a fourth condition. For example, a candidate cell can be the cell with the best signal quality among at least one neighboring cell. Neighboring cells can also be called adjacent cells or neighboring neighboring cells.

[0176] For example, a terminal device moves from cell #1 to cell #2. Before the handover, the original cell (i.e., the serving cell) is cell #1. Multiple neighboring cells can include cell #2, cell #3, and cell #4. Multiple candidate cells can include cell #2 and cell #3. During the handover process, the target cell can be cell #2. After the handover, the serving cell can be the target cell, i.e., cell #2.

[0177] 11. Original access network equipment and target access network equipment

[0178] The original access network equipment can refer to the access network equipment corresponding to the original cell. It can also refer to the access network equipment that the terminal equipment accessed before the handover. The original access network equipment can provide services to the original cell. The original cell can refer to the cell covered by the original access network equipment. The original cell can refer to the cell served by the original access network equipment.

[0179] The target access network device can refer to the access network device corresponding to the target cell. The target access network device can also refer to the access network device that the terminal device accesses after handover. The target access network device can provide services to the target cell. The target cell can refer to the cell covered by the target access network device. The target cell can refer to the cell served by the target access network device.

[0180] The original access network device and the target access network device can be the same access network device. Alternatively, the original access network device and the target access network device can be different access network devices.

[0181] In a CU-DU separation architecture, an access network device may include at least one CU and at least one DU. The original access network device and the target access network device can be the same DU. Optionally, the original access network device and the target access network device can be different DUs. Different DUs can correspond to the same CU or different CUs.

[0182] 12. Cell-level measurement (CLM), beam-level measurement (BLM), layer 1 measurement (LM), layer 2 measurement (LM), layer 3 measurement (LM)

[0183] Depending on the object being measured, the measurement can include at least one of the following: cell-level measurement or beam-level measurement. Cell-level measurement refers to the terminal equipment measuring the signal quality of a cell. Beam-level measurement refers to the terminal equipment measuring the signal quality of a beam. Cell measurement results can be determined based on the results of multiple beam measurements. Cell-level measurements are relatively coarse and have lower real-time performance. Beam-level measurements are more precise and have higher real-time performance.

[0184] Depending on its layer in the protocol stack, a measurement can include at least one of the following: Layer 1 measurement, Layer 2 measurement, or Layer 3 measurement. Layer 1 measurement can refer to measurements related to the physical layer. For example, Layer 1 measurement can be used to measure signal strength or signal quality. Layer 1 measurement can be used for cell-level and / or beam-level measurements. Layer 1 measurements offer high real-time performance, fast measurement speed, but low signal stability.

[0185] Layer 2 measurements can refer to measurements related to the data link layer. For example, Layer 2 measurements can optimize resource scheduling and / or load balancing based on Layer 1 measurement results. Layer 2 measurements can be used for cell-level measurements.

[0186] Layer 3 measurements refer to measurements related to the network layer. For example, Layer 3 measurements can be used to make higher-level decisions based on Layer 1 and / or Layer 2 measurement results. Layer 3 measurements can be used for cell-level measurements. Layer 3 measurements can be used for cell handover, cell selection, or cell reselection. Layer 3 measurements are slower in real-time and measurement speed, but have higher signal stability.

[0187] 13. Measurement parameters (or measurement indicators, measurement quantities) can be used to evaluate signal quality.

[0188] Depending on the object being measured, the measurement parameters (or measurement indicators) may include at least one of the following: cell-level measurement parameters (CLMP) or beam-level measurement parameters (BLMP).

[0189] Cell-level measurement parameters may include at least one of the following: cell RSRP (reference signal received power), cell RSRQ (reference signal received quality), cell SINR (signal-to-interference-plus-noise radio), or cell RSSI (received signal strength indicator), etc.

[0190] Beam-level measurement parameters may include at least one of the following: beam RSRP, beam RSRQ, beam SINR, beam RSSI, or beam CQI (channel quality indicator).

[0191] Depending on the layer of the measurement in the protocol stack, the measurement parameters may include at least one of the following: layer 1 measurement parameters (LMP), layer 2 measurement parameters (LMP), or layer 3 measurement parameters (LMP).

[0192] Layer 1 measurement parameters may include at least one of the following: RSRP, RSRQ, SINR, RSSI, or CQI.

[0193] Layer 2 measurement parameters may include at least one of the following: throughput, block error rate (BLER), latency, or packet loss rate (PLR).

[0194] Layer 3 measurement parameters may include at least one of the following: RSRP, RSRQ, SINR, RSSI, or CQI.

[0195] 14. Triggering conditions can refer to the conditions under which access network equipment or terminal equipment determines whether to perform a triggering action based on measurement results and / or network status. For example, triggering actions may include at least one of the following: cell handover, beam switching, or measurement reporting, etc.

[0196] Triggering conditions may include at least one of the following: a measured quantity (or measurement parameter), a comparison strategy, or a triggering action. A comparison strategy may include at least one of absolute comparison or relative comparison. Absolute comparison can be implemented using a threshold. A triggering action can refer to the action performed when the triggering condition is met. Furthermore, triggering conditions may also include at least one of hysteresis parameters or time-to-trigger (TTT). Hysteresis parameters can be used to reduce the probability of ping-pong triggering caused by signal fluctuations. Triggering time can refer to the duration for which the triggering condition must be continuously met to improve stability.

[0197] 15. Measurement events (ME), cell-level measurement events, beam-level measurement events, layer 1 measurement events (LME), layer 2 measurement events (LME), layer 3 measurement events (LME), intra-system events (ISE), inter-system events (ISE), intra-frequency system events (IFSE), inter-frequency system events (IFSE)

[0198] A measurement event can refer to a condition that triggers a terminal device to report a measurement report when it measures the signal quality of a third object. Measurement events can be used to provide decision-making support for access network devices and enable mobility management.

[0199] The third measurement object may include a cell or a beam. A cell may include at least one of a serving cell or a neighboring cell. A beam may include at least one of a serving beam or a neighboring beam. Therefore, a measurement event may include at least one of the following: a cell-level measurement event or a beam-level measurement event. A cell-level measurement event may refer to an event in which the terminal device measures the signal quality of the serving cell and neighboring cells and triggers the terminal device to report a measurement report. A beam-level measurement event may refer to an event in which the terminal device measures the signal quality of the serving beam and neighboring beams and triggers the terminal device to report a measurement report.

[0200] Depending on the layer of the measurement event in the protocol stack, the measurement event may include at least one of the following: Layer 1 measurement event, Layer 2 measurement event, or Layer 3 measurement event.

[0201] Depending on the differences in network technologies or standards, measurement events can include at least one of the following: intra-system measurement events or inter-system measurement events. Intra-system measurement events can refer to terminal equipment performing measurements or switching within the same network technology or standard. Inter-system measurement events can refer to terminal equipment performing measurements or switching between different network technologies or standards. Intra-system measurement events can include at least one of the following: same-frequency systems or different-frequency systems. Same-frequency systems can refer to terminal equipment performing measurements or switching within the same network technology or standard, using the same frequency configuration. Different-frequency systems can refer to terminal equipment performing measurements or switching within the same network technology or standard, using different frequency configurations.

[0202] System measurement events can include Class A events. For example, Class A events can include at least one of the following: event A1 (or event A1) (i.e., Event A1), event A2 (or event A2) (i.e., Event A2), event A3 (or event A3) (i.e., Event A3), event A4 (or event A4) (i.e., Event A4), event A5 (or event A5) (i.e., Event A5), or event A6 (or event A6) (i.e., Event A6). Table 1 below shows a description of Class A events.

[0203]

[0204]

[0205] Table 1

[0206] Inter-system measurement events can include Class B events. Class B events can include at least one of the following: event B1 (or event B1) (i.e., Event B1) or event B2 (or event B2) (i.e., Event B2). Table 2 below shows a description of Class B events.

[0207]

[0208]

[0209] Table 2

[0210] 16. Measurement configuration (MC) can be a mobility management signaling used to instruct terminal devices to perform signal quality measurements and trigger measurement event reporting.

[0211] Measurement configuration may include at least one of the following: measurement objective (MO), reporting configuration (RC), measurement identities (MI), quantity configuration (QC), or measurement gap (MG).

[0212] The measurement object can refer to a fourth measurement object that the terminal equipment needs to measure. The fourth measurement object may include at least one of the following: frequency point or cell list.

[0213] The report configuration may include at least one of the following: a fifth condition, a third type, or a first format. The fifth condition may be used to indicate the conditions that trigger the terminal device to report a measurement report. The third type may be used to indicate the reference signal (RS) type used by the terminal device for cell or beam measurements. The first format may be used to indicate the quantity configuration of the cell or beam in the measurement report.

[0214] Measurement identifiers can be used to associate measurement objects with reporting configurations. A measurement object can have at least one reporting configuration.

[0215] Measurement configuration can be used to configure measurement filtering settings for event-based and / or periodic reporting. For example, measurement filtering configuration can include filter coefficients for the measured quantity. The measured quantity can also be referred to as the measurement parameter. Periodic reporting refers to the terminal device triggering a measurement report when the timer for the measurement period expires. The timer can be based on a pre-configured twelfth threshold for the measurement period or a countdown. The timer for the measurement period expires when the countdown reaches the twelfth threshold or reaches zero. Event-based reporting refers to the terminal device reporting the measurement result when the measurement result meets the triggering conditions of a measurement event.

[0216] Measurement intervals can be used to indicate the time period during which a terminal device can perform measurements.

[0217] 17. Handover configuration (HOC) refers to the information required for a terminal device to switch from one cell to another.

[0218] Switching configuration information may include at least one of the following: measurement configuration, radio resource configuration information, or execution parameters. Measurement configuration may include at least one of the following: measurement object, reporting configuration, measurement identifier, quantity configuration, or measurement interval. Reporting configuration may include at least one of the following: test event type or triggering conditions, etc.

[0219] Radio resource configuration information may include radio resources allocated to candidate cells. For example, radio resources may include at least one of time slots or frequency resource blocks.

[0220] Execution parameters may include at least one of the following: switching execution duration or failure handling strategy, etc.

[0221] 18. RRC reconfiguration (RRC reconfig) messages can be signaling sent from access network devices to terminal devices to dynamically modify the terminal device's radio resource configuration information, mobility parameters, or protocol stack behavior. For example, RRC reconfiguration messages can be used to configure candidate cell configuration information.

[0222] 19. MAC CE (medium access control control element) signaling can refer to the signaling used by the MAC layer to transmit control information.

[0223] 20. Timing Advance (TA) refers to a parameter used in a communication system to calibrate the uplink transmission timing of terminal equipment, so as to align the uplink signal of the terminal equipment with the access network equipment side and reduce inter-symbol interference.

[0224] 21. CHO (Cell Handover Request) is a handover method introduced in Release 16 (R16) that allows a terminal device to automatically perform a handover when the triggering conditions are met. Before handover, the terminal device can acquire at least one candidate cell so that it can determine the target cell from at least one candidate cell when a handover is required. This method can improve the handover success rate. To better understand CHO, the following will combine... Figure 1 Please provide an explanation.

[0225] Figure 1 A flowchart of cell handover process based on CHO provided for related technologies.

[0226] like Figure 1 As shown, the method includes steps S101-S111. This method can be applied to terminal devices, primary access network devices, and candidate access network devices.

[0227] In S101, the terminal device sends the first measurement result to the original access network device.

[0228] According to an embodiment of this application, the terminal device can measure the signal quality of the original cell and neighboring cells according to a first measurement configuration to obtain a first measurement result.

[0229] In S102, the original access network equipment determines the first decision result based on the first measurement result.

[0230] According to embodiments of this application, the original access network equipment can be used to serve the original cell. The original access network equipment can determine a first decision result based on at least one of a first measurement result, load balancing information, or energy-saving requirement information. The first decision result can include at least one of the following: performing a CHO (Confirmation of Hazard) operation, not performing a CHO operation, or at least one candidate cell. A candidate cell can refer to a cell among the original cell's neighboring cells that supports a CHO operation. The signal quality of the candidate cell can satisfy a sixth condition. The number of candidate cells can be configured according to actual service requirements and is not limited here. For example, the number of candidate cells can be 8.

[0231] In S103, if the original access network device's first decision result is to execute CHO, it sends a third request to at least one candidate access network device.

[0232] According to an embodiment of this application, the third request can be used to request fourth configuration information of the candidate cell from the candidate access network device.

[0233] In S104, at least one candidate access network device responds to the third request and determines fourth configuration information corresponding to each of the at least one candidate access network device.

[0234] In S105, at least one candidate access network device sends fourth configuration information corresponding to each of the at least one candidate access network device to the original access network device.

[0235] According to embodiments of this application, the fourth configuration information may include a first measurement configuration and a first triggering condition. The candidate cell is configured with at least one first triggering condition. For example, the candidate cell is configured with a triggering condition corresponding to event A3 and a triggering condition corresponding to event A5.

[0236] In S106, the original access network device determines the twelfth information based on the fourth configuration information corresponding to each of the at least one candidate access network device.

[0237] According to embodiments of this application, a terminal device may store fourth configuration information corresponding to at least one candidate access network device. The terminal device can obtain twelfth information based on the fourth configuration information. The twelfth information may be carried in an RRC reconfiguration message. The twelfth information may include the fourth configuration information.

[0238] In S107, the original access network equipment sends the twelfth information to the terminal equipment.

[0239] According to an embodiment of this application, the original access network device can send the twelfth information to the terminal device via an RRC reconfiguration message.

[0240] In S108, the terminal device executes the CHO evaluation process based on the twelfth information and obtains the sixth result.

[0241] In S109, the terminal device determines the target cell from at least one candidate cell based on the sixth result.

[0242] In S110, the terminal device switches from the original cell to the target cell.

[0243] According to an embodiment of this application, a terminal device can disconnect from the original access network device and connect to the target access network device to complete cell handover.

[0244] In S111, the terminal device releases the fourth configuration information.

[0245] According to an embodiment of this application, when a terminal device completes a cell handover, it can release the fourth configuration information corresponding to at least one candidate access network device.

[0246] 22. LTM can be a low-latency handover method. LTM can trigger handover in real time through Layer 1 (i.e., physical layer) and / or Layer 2 (i.e., data link layer) without the need for signaling interaction with Layer 3 (i.e., network layer).

[0247] The LTM process is as follows: The terminal device can send a second measurement result to the original access network device. The second measurement result can be obtained based on Layer 1 measurement and / or Layer 2 measurement. The original access network device can determine a second decision result based on the second measurement result. If the second decision result is to execute LTM, the original access network device sends a fourth request to at least one candidate access network device. In response to the fourth request, at least one candidate access network device determines fifth configuration information corresponding to each of the at least one candidate access network device. At least one candidate access network device sends the fifth configuration information corresponding to each of the at least one candidate access network device to the original access network device. Based on the fifth configuration information corresponding to each of the at least one candidate access network device, the original access network device determines thirteenth information. The original access network device can send the thirteenth information to the terminal device. As one implementation, the thirteenth information can be carried in an RRC reconfiguration message.

[0248] Upon receiving the thirteenth information, the terminal device can perform downlink synchronization with at least one candidate cell and uplink synchronization with at least one candidate cell. It should be noted that during the uplink synchronization process with the candidate cells, the terminal device can obtain the TA (Target Acquisition) of the candidate cells using the following method.

[0249] As one implementation, if the original access network device indicates in the thirteenth information that the terminal device should measure the uplink TA, then the terminal device can measure the original cell to obtain the original cell's TA. The terminal device can then determine the candidate cell's TA based on the original cell's TA and the reception time difference between the original cell and the candidate cell.

[0250] As an alternative implementation, the primary access network device can trigger contention-free random access (CFRA) based on physical downlink control channel order (PDCCH Order) to obtain the target access date (TA) of a candidate cell. The terminal device then initiates CFRA with the primary access network device to obtain the TA of the candidate cell.

[0251] The terminal device performs Layer 1 measurements for the original cell and at least one candidate cell, obtaining the Layer 1 measurement results for the original cell and the corresponding Layer 1 measurement results for each of the at least one candidate cell. The terminal device then sends the Layer 1 measurement results for the original cell and the corresponding Layer 1 measurement results for each of the at least one candidate cell to the original access network equipment.

[0252] The original access network equipment determines the target cell from at least one candidate cell based on the Layer 1 measurement results of the original cell and the Layer 1 measurement results corresponding to at least one candidate cell.

[0253] The original access network equipment can send a first instruction to the terminal equipment. The first instruction can be carried in MAC CE signaling. The first instruction is used to indicate the LTM handover instruction. The MAC CE signaling may include at least one of the following: TA, transmission configuration indication state (TCI State) identifier (IdentityDocument, ID), CFRA resource information or candidate cell configuration information identifier.

[0254] Upon receiving the first instruction, the terminal device can disconnect from the original access network device and execute a random access procedure to connect to the target cell. Data transmission can then be performed through the target access network device, which can then serve the target cell. This completes the LTM cell handover.

[0255] For the TA in the MAC CE signaling, if the original access network device determines that the TA previously obtained by the terminal device is in a valid state, then the TA will be included in the MAC CE signaling.

[0256] If the terminal device receives the first instruction, and the MAC CE signaling includes TA or the terminal device self-tests TA, then the terminal device can initiate a handover without random access to the target access network device. That is, the terminal device can send uplink signaling or the first uplink data packet to the target access network device to indicate that it has completed access to the target access network device.

[0257] It should be noted that the original access network device and the target access network device can be the same access network device or different access network devices.

[0258] 23. CLTM can be an enhanced mobility management method introduced in Release 17. It combines the reliability of CHO with the low latency of LTM, achieving ultra-reliable and / or low-latency mobility management through the coordination of pre-configured resources and dynamic signaling. To better understand CLTM, the following will combine... Figure 2 Please provide an explanation.

[0259] Figure 2 A flowchart of a CLTM-based cell handover method provided for related technologies.

[0260] like Figure 2 As shown, the method includes steps S201-S210. This method can be applied to terminal devices, primary access network devices, and candidate access network devices.

[0261] In S201, the terminal device sends the third measurement result to the original access network device.

[0262] According to an embodiment of this application, the terminal device can measure the signal command of the original cell and the signal quality of the neighboring cell according to the second measurement configuration to obtain a third measurement result.

[0263] In S202, the original access network equipment determines the third decision result based on the third measurement result.

[0264] According to embodiments of this application, the third decision result may include at least one of the following: performing CLTM, not performing CLTM, or at least one candidate cell. A candidate cell may refer to a cell among the original cell's neighboring cells that supports CLTM. The signal quality of the candidate cell may satisfy the seventh condition. The number of candidate cells can be configured according to actual service requirements and is not limited here. For example, the number of candidate cells may be 8.

[0265] In S203, if the third decision result is to execute CLTM, the original access network device sends a fifth request to at least one candidate access network device.

[0266] According to an embodiment of this application, the fifth request can be used to request the sixth configuration information of the candidate cell from the candidate access network device.

[0267] In S204, at least one candidate access network device responds to the fifth request and determines the sixth configuration information corresponding to each of the at least one candidate access network device.

[0268] In S205, at least one candidate access network device sends the sixth configuration information corresponding to each of the at least one candidate access network device to the original access network device.

[0269] According to embodiments of this application, the sixth configuration information may include a second measurement configuration and a second triggering condition. The candidate cell is configured with at least one second triggering condition. For example, at least one second triggering condition may include a second triggering condition corresponding to a Layer 1 measurement event and / or a second triggering condition corresponding to a Layer 3 measurement event. The second triggering condition corresponding to a Layer 1 measurement event may be a beam-level triggering condition. The second triggering condition corresponding to a Layer 3 measurement event may be a cell-level triggering condition. The second triggering condition corresponding to a Layer 3 measurement event may include a triggering condition corresponding to event A3 and / or a triggering condition corresponding to event A5.

[0270] In S206, the original access network device determines the fourteenth information based on the sixth configuration information corresponding to each of the at least one candidate access network device.

[0271] According to embodiments of this application, a terminal device may store sixth configuration information corresponding to at least one candidate access network device. The terminal device can obtain fourteenth information based on the sixth configuration information. The fourteenth information may be carried in an RRC reconfiguration message. The fourteenth information may include the sixth configuration information.

[0272] In S207, the original access network equipment sends the fourteenth message to the terminal equipment.

[0273] According to an embodiment of this application, the original access network device can send the fourteenth information to the terminal device via an RRC reconfiguration message.

[0274] In S208, the terminal device executes the CLTM evaluation process based on the fourteenth information to obtain the eighth result.

[0275] In S209, the terminal device determines the target cell from at least one candidate cell based on the eighth result.

[0276] In S210, the terminal device switches from the original cell to the target cell.

[0277] According to an embodiment of this application, a terminal device can disconnect from the original access network device and connect to the target access network device to complete cell handover.

[0278] 24. NES (Network Energy Saving) mode refers to a mode in which access network devices reduce energy consumption by dynamically adjusting resource usage. For example, access network devices can reduce energy consumption by shutting down some radio frequency units, reducing resource allocation, or initiating sleep mode, among other things.

[0279] NES mode may include at least one of the following: discontinuous transmission (DTX) or discontinuous reception (DRX).

[0280] For ease of understanding, the following will use... Figure 3 The communication system shown is used as an example to describe a communication system that can be applied to the embodiments of this application.

[0281] Figure 3 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Figure 3 A schematic diagram of a possible, non-limiting system architecture is shown.

[0282] like Figure 3As shown, the communication system 300 may include at least one access network device and at least one terminal device. The access network device may have a wireless network coverage area. A cell may be an area within the coverage area of ​​the access network device. The access network device may serve at least one cell.

[0283] For example, communication system 300 may include access network device 310, access network device 320, and terminal device 330. Terminal device 330 may be mobile or fixed. Both access network device 310 and access network device 320 can communicate with terminal device 330 via a wireless link. If terminal device 330 is within the coverage area of ​​access network device 310, access network device 310 can provide services to terminal device 330. If terminal device 330 is within the coverage area of ​​access network device 320, access network device 320 can provide services to terminal device 330.

[0284] In one implementation, access network device 310 can be the original access network device. Access network device 330 can be the target access network device. Access network device 310 can provide services to terminal device 330 before cell handover. Access network device 320 can provide services to terminal device 330 after cell handover.

[0285] The above communication devices, for example, Figure 3 Access network device 310, access network device 320, and terminal device 330 can all be configured with multiple antennas. These multiple antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. Additionally, each communication device may include transmitter chains and receiver chains, which may each include multiple components related to signal transmission and signal reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, or antennas, etc.).

[0286] It should be noted that the terminal device and access network device (e.g., the first access network device, the second access network device, or the third access network device) in this application embodiment may be equipped with communication modules, circuits, or chips that perform corresponding cell handover functions. The terminal device and access network device may also be configured with program instructions for performing corresponding cell handover functions and corresponding program instructions. In this application embodiment, the terminal device may also be a logical node, logical module, or software capable of implementing all or part of the terminal device functions. In this application embodiment, the access network device may also be a logical node, logical module, or software capable of implementing all or part of the access network device functions. This application embodiment does not limit the specific form of the terminal device and access network device.

[0287] It should also be noted that the network architecture and application scenarios described in the embodiments of this application are for the purpose of facilitating the understanding of the technical solutions provided in the embodiments of this application, and do not constitute a limitation on the embodiments of this application. As network architectures evolve and new application scenarios emerge, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0288] It should also be noted that the following examples, used for ease of understanding and explanation, illustrate the methods provided in this application embodiment through interactions between a terminal device and a first access network device, between a terminal device, a first access network device, and a third access network device, and between a terminal device, a first access network device, and a second access network device. However, this should not limit the subject executing the methods provided in this application embodiment. For example, the terminal device shown in the following embodiments can be replaced by components configured in the terminal device (e.g., circuits, chips, chip systems, or other functional modules capable of calling and executing programs). The access network devices (e.g., the first access network device, the second access network device, or the third access network device) in the following embodiments can be replaced by components configured in the access network device (e.g., circuits, chips, chip systems, or other functional modules capable of calling and executing programs). Communication can be achieved by running a program containing code of the methods provided in this application embodiment, according to the methods provided in this application embodiment.

[0289] The inventive concept of the embodiments of this application will now be described with reference to the accompanying drawings.

[0290] Terminal devices may undergo cell handover due to location changes, service changes, network coverage changes, or other circumstances. The terminal device may be in a connected state. For example, cell handover can refer to the process of a terminal device switching from a first cell to a target second cell. The first cell can be the original cell. The target second cell can be the target cell.

[0291] With the continuous development of communication technology, cell handover methods are becoming increasingly sophisticated. For example, cell handover methods may include at least one of the following: CHO, LTM, or CLTM, etc.

[0292] In related technologies, it has been found that how to achieve cell handover when at least two handover methods coexist is an urgent problem to be solved.

[0293] Therefore, embodiments of this application propose a method for cell handover when at least two of the first, second, or third methods coexist, based on handover priority. For ease of understanding, the following describes... Figure 4 Please provide an explanation.

[0294] Figure 4 This is a schematic diagram illustrating the principle of the cell handover method provided in the embodiments of this application.

[0295] like Figure 4 As shown, cell handover can refer to the process of determining a target second cell from at least one second cell. The second cell can be a candidate cell. The cell handover method can include at least two of the following: a first method, a second method, or a third method. The first method can be a CLTM triggered by a first event. The first event can be a Layer 1 measurement event. The second method can be a CLTM triggered by a second event. The second event can be a Layer 3 measurement event. The third method can be a CHO (Cell Handover Event).

[0296] To enable handover from a first cell to a target second cell when at least two of the first, second, or third methods are available, a method of configuring handover priorities for the first, second, and third methods can be adopted. Thus, the terminal device can perform cell handover according to the handover priorities corresponding to the first, second, and third methods.

[0297] The next step is to consider how to configure the switching priority for the first, second, and third methods.

[0298] It was found that since the first method is CLTM triggered by layer 1 measurement events, the second method is CLTM triggered by layer 3 measurement events, and the third method is CHO, CHO can be a handover method triggered by layer 3 measurement events. The robustness of layer 3 measurement results can be better than that of layer 1 measurement results, and the robustness of CHO can be better than that of CLTM. Higher robustness can improve the handover success rate, improve anti-interference ability, and expand scenario compatibility. Therefore, from the perspective of the robustness of measurement results, the handover priority can be configured from high to low as the third method → ​​the second method → ​​the first method.

[0299] The robustness of Layer 3 measurement results is superior to that of Layer 1 measurement results because, from a temporal perspective, Layer 1 measurement results are obtained based on real-time measurements at Layer 1 (i.e., the physical layer), without involving filtering or undergoing simple filtering. Layer 3 measurement results, on the other hand, can be obtained by processing cell-level measurement parameters using multi-layer filtering. Cell-level measurement parameters can be obtained through long-term measurements. From a spatial perspective, Layer 3 measurement results are based on cell-level measurement parameters, while Layer 1 measurement results are based on beam-level measurement parameters. Beam-level measurements may experience sudden congestion, affecting the stability of Layer 1 measurement results, but in such cases, cell-level measurements can remain stable. From a protocol-layer fault-tolerance design perspective, Layer 3 measurements can reliably transmit measurement control commands through RRC signaling retransmission, while Layer 1 measurements may be interrupted due to LI signaling loss.

[0300] Furthermore, in the event that cell handover fails N times using either the third or second method, it is proposed that other methods can be used to perform cell handover. N can be an integer greater than or equal to 1. For example, if handover fails N times using the third method, other methods may include the second or first method. If handover fails N times using the second method, other methods may include the first method.

[0301] For ease of understanding, Figure 4 Based on, combined Figure 5 Please provide an explanation.

[0302] Figure 5 This is a schematic diagram illustrating the handover priority of the cell handover method provided in the embodiments of this application.

[0303] like Figure 5 As shown, when at least two of the first, second, or third methods coexist, based on the robustness of the measurement results, the handover priority of the first, second, and third methods can be configured from high to low as: third method → ​​second method → ​​first method. If cell handover fails N times using the third or second method, other methods can be used to perform the handover. N can be an integer greater than or equal to 1.

[0304] exist Figure 5 Based on this, the following will combine Figure 6 and Figure 7 An example of switching priorities is provided.

[0305] Figure 6 This is a schematic diagram illustrating a priority switching method provided in an embodiment of this application.

[0306] like Figure 6 As shown, Figure 6 An "×" indicates a mode that does not meet the triggering conditions corresponding to the switchable mode. A "√" indicates a mode that meets the triggering conditions corresponding to the switchable mode. Switchable modes can include at least one of the following: mode one, mode two, or mode three.

[0307] Based on the above, the cell handover method corresponding to the second cell 611 includes a second method, which is a method that meets the triggering conditions corresponding to the second method for the second cell 611. The cell handover method corresponding to the second cell 612 includes a first method, which is a method that meets the triggering conditions corresponding to the first method for the second cell 612. The cell handover method corresponding to the second cell 613 includes both a first method and a second method, where the first method meets the triggering conditions corresponding to the first method for the second cell 613, and the second method meets the triggering conditions corresponding to the second method. For the second cell 614, neither the first method, the second method, nor the third method meets their respective triggering conditions.

[0308] Based on the handover priority from high to low as third method → ​​second method → ​​first method, the cell handover based on the second method is determined.

[0309] Figure 7 This is a schematic diagram illustrating another priority switching method provided in an embodiment of this application.

[0310] like Figure 7 As shown, Figure 7 The meanings of “×” and “√” in Chinese Figure 6 same.

[0311] Based on the above, the cell handover methods corresponding to the second cell 711 include a second method and a third method. Specifically, for the second cell 711, the second method is the method that meets the triggering conditions corresponding to the second method, and the third method is the method that meets the triggering conditions corresponding to the third method. The cell handover methods corresponding to the second cell 712 include a first method. Specifically, for the second cell 712, the first method is the method that meets the triggering conditions corresponding to the first method. The cell handover methods corresponding to the second cell 713 include a second method. Specifically, for the second cell 713, the second method is the method that meets the triggering conditions corresponding to the second method. The cell handover methods corresponding to the second cell 714 include a third method. Specifically, for the second cell 714, the third method is the method that meets the triggering conditions corresponding to the third method.

[0312] Based on the handover priority from high to low as third method → ​​second method → ​​first method, the cell handover based on third-party method is adopted.

[0313] Furthermore, it was found that the first access network device can be the access network device corresponding to the first cell, meaning the first access network device can be used to serve the first cell. The operating mode of the first access network device can be either non-NES mode or NES mode. When the first access network device operates in NES mode, how to achieve cell handover in cases where at least two of the first, second, or third methods coexist is also an urgent problem to be solved.

[0314] Therefore, embodiments of this application propose enabling at least one of the first, second, or third modes applied to NES mode based on indication information. For example, the first access network device can send fifth information to the terminal device. The fifth information may include at least one of the following: the first mode is the first mode corresponding to NES mode, the second mode is the second mode corresponding to NES mode, or the third mode is the third mode corresponding to NES mode.

[0315] Furthermore, it was found that wireless link failures and / or cell handover failures may occur. To improve the success rate of subsequent handovers, this application proposes a method of network optimization using a second access network device. To enable the second access network device to optimize the network, it was found that failure information can be recorded and reported to the second access network device.

[0316] For example, in the event of a radio link failure and / or cell handover failure, the terminal device can record sixth information. This sixth information is then sent to the second access network device so that the second access network device can optimize the network based on the sixth information, thereby improving the success rate of subsequent handovers.

[0317] The second access network device can be the access network device corresponding to the third cell or the access network device corresponding to the fourth cell. The third cell can be the cell where the handover failed. The fourth cell can be different from the third cell.

[0318] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0319] The inventive concept of the embodiments of this application has been described above. The cell handover method and information processing method provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0320] It should be understood that the following description is for ease of understanding and explanation only, using the interaction between a terminal device, a first access network device, and a second access network device as an example to illustrate the method provided in the embodiments of this application. However, this should not constitute any limitation on the subject executing the method provided in this application. For example, the terminal device shown in the following embodiments can be replaced by components (such as chips or circuits) configured in the terminal device. The first access network device shown in the following embodiments can also be replaced by components (such as chips or circuits) configured in the first access network device.

[0321] The embodiments shown below do not specifically limit the structure of the execution subject of the method provided in the embodiments of this application. As long as it is possible to communicate according to the method provided in the embodiments of this application by running a program that records the code of the method provided in the embodiments of this application, for example, the execution subject of the method provided in the embodiments of this application can be a terminal device or a first access network device, or a functional module in the terminal device or the first access network device that can call and execute the program.

[0322] The following will be based on having Figure 3 Taking the communication system shown as an example, the cell handover method provided in this application embodiment will be described. It should be noted that... Figure 3 This is merely an illustrative example and does not constitute a limitation on the embodiments of this application.

[0323] Firstly, combining Figure 8 , Figure 9 , Figure 11 and Figure 12 This document describes a cell handover method based on handover priority when at least two of the first, second, or third handover methods coexist. Specifically, it combines... Figure 8 The present application provides a detailed description of the cell handover method applied to a terminal device, a first access network device, and a third access network device according to the embodiments of this application. Figure 8 The first access network device can operate in either non-NES mode or NES mode. When the first access network device operates in NES mode, combined with... Figure 9 The present application provides a detailed description of the cell handover method applied to a terminal device, a first access network device, and a third access network device according to the embodiments of this application. Figure 9 and Figure 8 The difference is that, Figure 9 The first access network device operates in NES mode. Correspondingly, the cell handover method is the method used in NES mode. Combined with... Figure 11 This paper provides a detailed description of the cell handover method applied to terminal devices according to embodiments of this application. Finally, it combines... Figure 12 The following is a detailed description of the cell communication method applied to the first access network device according to the embodiments of this application.

[0324] Secondly, combining Figure 10 , Figure 13 and Figure 14 This section describes the information processing method based on the sixth information (i.e., failure information) in the event of radio link failure and / or cell handover failure. (Combined with...) Figure 10 This application provides a detailed description of the information processing method applied to a terminal device and a second access network device according to embodiments of this application. (In conjunction with...) Figure 13This application provides a detailed description of the information processing method applied to a terminal device according to embodiments of the present application. Figure 13 The information processing method applied to the second access network device in the embodiments of this application will be described in detail.

[0325] Furthermore, aside from the fact that the information processing method described in the second aspect is unrelated to the cell handover method described in the first aspect, the information processing method described in the second aspect can also be a method proposed for situations of radio link failure and / or cell handover failure, based on the cell handover method described in the first aspect.

[0326] It should be noted that the embodiments of this application can be implemented independently or in combination with each other, and the same or similar concepts or processes will not be described again in some embodiments.

[0327] To facilitate understanding, the following explanations will be provided in conjunction with the above text regarding the fourth information and the third access network device, and supplementary explanations will be given regarding the first access network device, the second access network device, the third cell, the fourth cell, the first mode, the second mode, the third mode, the first event, the second event, and the switchable mode.

[0328] The fourth information may include at least two of the following: a trigger condition corresponding to the first method, a trigger condition corresponding to the second method, or a trigger condition corresponding to the third method; that is, the fourth information may include both the trigger condition corresponding to the first method and the trigger condition corresponding to the second method. Optionally, the fourth information may include both the trigger condition corresponding to the first method and the trigger condition corresponding to the third method. Optionally, the fourth information may include both the trigger condition corresponding to the second method and the trigger condition corresponding to the third method. Optionally, the fourth information may include the trigger condition corresponding to the first method, the trigger condition corresponding to the second method, and the trigger condition corresponding to the third method. For the trigger condition corresponding to the first method, at least one second cell may have its own corresponding trigger condition corresponding to the first method. The trigger conditions corresponding to the first method for different second cells may be the same or different. For the trigger condition corresponding to the second method, at least one second cell may have its own corresponding trigger condition corresponding to the second method. The trigger conditions corresponding to the second method for different second cells may be the same or different. For the trigger condition corresponding to the third method, at least one second cell may have its own corresponding trigger condition corresponding to the third method. The trigger conditions corresponding to the third method for different second cells may be the same or different. Therefore, at least one second cell may have its own corresponding fourth information. This application does not limit the scope of the embodiments.

[0329] The second access network device can be the access network device corresponding to the third cell, that is, the second access network device can be used to serve the third cell as backup. The third cell can be the cell where the handover failed. As one implementation, if the terminal device does not handover from the first cell to the target second cell, the target second cell can be called the third cell. Optionally, the second access network device can be the access network device corresponding to the fourth cell. The fourth cell can be different from the third cell. As one implementation, the fourth cell can be the first cell. As another implementation, if the terminal device handovers from the first cell to the target second cell, the fourth cell can be the target second cell. This application embodiment does not limit the fourth cell, as long as it is different from the third cell. It should be noted that the third cell can be unrelated to the first and second cells. The fourth cell can be unrelated to the first and second cells.

[0330] The third access network device can be the access network device corresponding to the second cell, that is, the third access network device can be used to serve the second cell.

[0331] The first access network device, the second access network device, and the third access network device can be the same access network device. Optionally, the first access network device and the second access network device can be the same access network device. The third access network device is different from the first and second access network devices. Optionally, the first access network device and the third access network device can be the same access network device. The second access network device is different from the first and third access network devices. Optionally, the second access network device and the third access network device can be the same access network device. The first access network device is different from the second and third access network devices. Optionally, the first access network device, the second access network device, and the third access network device are different from each other.

[0332] The first method can be either the first method corresponding to the non-NES mode or the first method corresponding to the NES mode. That is, when the first access network device is operating in NES mode, the first method can be the first method corresponding to the NES mode. When the first access network device is operating in non-NES mode, the first method can be the first method corresponding to the non-NES mode.

[0333] The second method can be either the second method corresponding to the non-NES mode or the second method corresponding to the NES mode. Specifically, if the first access network device is operating in NES mode, the second method can be the second method corresponding to the NES mode. If the first access network device is operating in non-NES mode, the second method can be the second method corresponding to the non-NES mode.

[0334] The third method can be either the third method corresponding to the non-NES mode or the third method corresponding to the NES mode. That is, if the first access network device is operating in NES mode, the third method can be the third method corresponding to the NES mode. If the first access network device is operating in non-NES mode, the third method can be the third method corresponding to the non-NES mode.

[0335] The handover mode can be used to indicate the handover modes that the second cell can support. The handover mode can include at least one of the following: a first mode, a second mode, or a third mode. If the second cell's handover mode includes the first mode, the second cell can be called an L1-CLTM cell. If the second cell's handover mode includes the second mode, the second cell can be called an L3-CLTM cell. If the second cell's handover mode includes the third mode, the second cell can be called a CHO cell.

[0336] Figure 8 This is a flowchart illustrating a cell handover method provided in an embodiment of this application. This method can be applied to a terminal device, a first access network device, and a third access network device.

[0337] like Figure 8 As shown, the method includes S801-S810.

[0338] In S801, the terminal device sends the fourth measurement result to the first access network device.

[0339] According to embodiments of this application, a terminal device can measure a third signal quality and a fourth signal quality according to a third measurement configuration to obtain a fourth measurement result. The third signal quality may include the signal quality of a first cell or the signal quality of a beam of the first cell. The fourth signal quality may include the signal quality of neighboring cells of the first cell or the signal quality of a beam of a neighboring cell. The third signal quality can be characterized by a first measurement parameter. The fourth signal quality can also be characterized by a first measurement parameter. The first measurement parameter may include at least one of the following: a Layer 1 measurement parameter, a Layer 2 measurement parameter, or a Layer 3 measurement parameter. For descriptions of the Layer 1, Layer 2, and Layer 3 measurement parameters, please refer to the corresponding sections above; they will not be repeated here.

[0340] It should be noted that the embodiments of this application do not limit the method of obtaining the fourth measurement result.

[0341] In S802, the first access network device determines the fourth decision result based on the fourth measurement result.

[0342] According to embodiments of this application, the fourth decision result may include executing at least two of the first, second, or third methods, executing one of the first, second, or third methods, or not executing the first, second, or third methods. It should be noted that embodiments of this application do not limit the method by which the fourth decision result is obtained.

[0343] In S803, if the fourth decision result is to execute at least two of the first, second, or third methods, the first access network device sends a second request to at least one third access network device.

[0344] According to embodiments of this application, a third access network device may correspond to a second cell. At least one third access network device may include a third access network device corresponding to each of at least one second cell. Different second cells may correspond to the same third access network device. Optionally, different second cells may correspond to different third access network devices; this application does not limit this. At least one second cell may be determined by a first access network device based on a fourth measurement result.

[0345] According to embodiments of this application, the second request can be used to request a third access network device to configure third information. The third information corresponding to the third access network device can be used to indicate at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information can be configuration information corresponding to the first method. The second configuration information can be configuration information corresponding to the second method. The third configuration information can be configuration information corresponding to the third method.

[0346] As one implementation method, the first configuration information may include at least one of the following: second cell information, first execution parameters, or fourth measurement configuration, etc. Furthermore, the first configuration information may also include triggering conditions corresponding to the first method.

[0347] As one implementation, the second configuration information may include at least one of the following: second cell information, second execution parameters, or fifth measurement configuration, etc. Furthermore, the second configuration information may also include triggering conditions corresponding to the second method.

[0348] As one implementation method, the third configuration information may include at least one of the following: second cell information, third execution parameters, or sixth measurement configuration, etc. Furthermore, the third configuration information may also include triggering conditions corresponding to the third method.

[0349] For the first execution parameter, second execution parameter, third execution parameter, fourth measurement configuration, fifth measurement configuration, and sixth measurement configuration, please refer to the explanations of execution parameters and measurement configurations above, which will not be repeated here. For the triggering conditions corresponding to the first method, the second method, and the third method, please refer to the corresponding sections below.

[0350] In S804, at least one third access network device responds to the second request and determines third information corresponding to each of the at least one third access network device.

[0351] According to embodiments of this application, for at least one third access network device, the third access network device may, in response to a second request, determine third information corresponding to the third access network device. For example, if the switchable modes supported by the third access network device include at least one of a first mode, a second mode, or a third mode, then the third information corresponding to the second access network device may include at least one of the following: first configuration information, second configuration information, or third configuration information.

[0352] In S805, at least one third access network device sends third information corresponding to each of the at least one third access network device to the first access network device.

[0353] In S806, the first access network device determines the first information based on the second information, the fourth information, and the third information corresponding to at least one third access network device.

[0354] According to embodiments of this application, the second information can be used to indicate information related to the handover priority of the first, second, and third modes. The handover priority can refer to the priority of executing the first, second, and third modes under corresponding conditions. The fourth information may include at least two of the following: a trigger condition corresponding to the first mode, a trigger condition corresponding to the second mode, or a trigger condition corresponding to the third mode. The second and fourth information may be configured by the first access network device.

[0355] The second information can be used to indicate information related to the switching priority of the first, second, and third methods, as follows.

[0356] As one implementation, the second information can be used to indicate that, under the first condition, the handover corresponding to the second method has the highest priority; that is, under the first condition, the second method is executed first. Alternatively, if the cell handover using the second method fails N times, the cell handover can be performed using the first method. N can be an integer greater than or equal to 1.

[0357] In the second scenario, the handover priority corresponding to the third method is the highest; that is, in the second scenario, the third method is executed first. Alternatively, if the cell handover fails N times using the third method, another method can be used to perform the cell handover. This other method can include either the first or the second method. If at least one first result exists, the other method can be the first method. If at least one second result exists, the other method can be the second method. If both at least one first result and at least one second result exist, the other method can be either the first or the second method. For example, if both at least one first result and at least one second result exist, considering the robustness of the measurement results, the second method is determined to be the other method.

[0358] The following explanation addresses the first and second scenarios.

[0359] For any second cell in at least one second cell, since the handover mode corresponding to that second cell can include at least one of a first mode, a second mode, or a third mode, the result corresponding to that second cell can include at least one of the results corresponding to the first mode, the results corresponding to the second mode, or the results corresponding to the third mode. If the result corresponding to the first mode satisfies the triggering condition corresponding to the first mode, then the result corresponding to the first mode can be called the first result. If the result corresponding to the second mode satisfies the triggering condition corresponding to the second mode, then the result corresponding to the second mode can be called the second result. If the result corresponding to the third mode satisfies the triggering condition corresponding to the third mode, then the result corresponding to the third mode can be called the third result.

[0360] Based on this, at least one result corresponding to at least one second cell may include at least one result corresponding to each of the at least one second cell. The at least one result may contain at least one first result, at least one second result, and no third result. Optionally, the at least one result may contain at least one third result, at least one first result, and at least one second result. Optionally, the at least one result may contain at least one third result, at least one first result, and no second result. Optionally, the at least one result may contain at least one third result, at least one second result, and no first result.

[0361] The first case can be defined as the situation where there is at least one first result, at least one second result, and no third result. The second case can be defined as the situation where there is at least one third result and at least one of the following: at least one of the following can include either at least one first result or at least one second result.

[0362] The following method can be used to determine whether the triggering conditions corresponding to the switchable mode are met.

[0363] The result corresponding to the second cell can be referred to as the fourth result corresponding to the second cell. The fourth result corresponding to the second cell can be used to indicate whether the fifth result corresponding to the handover mode satisfies the triggering condition corresponding to the handover mode. The fifth result corresponding to the handover mode can be obtained by measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell. As one implementation, the fifth result corresponding to the handover mode can be obtained by measuring the first signal quality based on the third information corresponding to the second cell. Optionally, the fifth result corresponding to the handover mode can be obtained by measuring the second signal quality based on the third information corresponding to the second cell. Optionally, the fifth result corresponding to the handover mode can be obtained by measuring both the first and second signal qualities based on the third information corresponding to the second cell.

[0364] The first signal quality can be the signal quality of the first measurement object. The first measurement object can include a second cell or a first beam. The first beam can be a beam used to indicate the second cell. The second signal quality can be the signal quality of the second measurement object. The second measurement object can include a first cell or a second beam. The second beam can be a beam used to indicate the first cell. The switchable mode can include at least one of the following: a first mode, a second mode, or a third mode.

[0365] If the fifth result corresponding to the switchable mode satisfies the trigger condition corresponding to the switchable mode, then it can be determined that the trigger condition corresponding to the switchable mode is met. That is, when the switchable mode is the first mode, if the fifth result corresponding to the first mode satisfies the trigger condition corresponding to the first mode, then it can be determined that the trigger condition corresponding to the first mode is met. Therefore, the fourth result corresponding to the second cell can be the fifth result corresponding to the first mode that satisfies the trigger condition corresponding to the first mode. Similarly, if the switchable mode is the second mode, and the fifth result corresponding to the second mode satisfies the trigger condition corresponding to the second mode, then it can be determined that the trigger condition corresponding to the second mode is met. Therefore, the fourth result corresponding to the second cell can be the fifth result corresponding to the first mode that satisfies the trigger condition corresponding to the second mode. Likewise, if the switchable mode is the third mode, and the fifth result corresponding to the third mode satisfies the trigger condition corresponding to the third mode, then it can be determined that the trigger condition corresponding to the third mode is met. Therefore, the fourth result corresponding to the second cell can be the fifth result corresponding to the third mode that satisfies the trigger condition corresponding to the third mode.

[0366] If the fifth result corresponding to the switchable mode does not meet the trigger condition corresponding to the switchable mode, then it can be determined that the trigger condition corresponding to the switchable mode is not met. That is, when the switchable mode is the first mode, if the fifth result corresponding to the first mode does not meet the trigger condition corresponding to the first mode, then it can be determined that the trigger condition corresponding to the first mode is not met. Therefore, the fourth result corresponding to the second cell can be that the fifth result corresponding to the first mode does not meet the trigger condition corresponding to the first mode. Similarly, if the switchable mode is the second mode, and the fifth result corresponding to the second mode does not meet the trigger condition corresponding to the second mode, then it can be determined that the trigger condition corresponding to the second mode is not met. Therefore, the fourth result corresponding to the second cell can be that the fifth result corresponding to the first mode does not meet the trigger condition corresponding to the second mode. Likewise, if the switchable mode is the third mode, and the fifth result corresponding to the third mode does not meet the trigger condition corresponding to the third mode, then it can be determined that the trigger condition corresponding to the third mode is not met. Therefore, the fourth result corresponding to the second cell can be that the fifth result corresponding to the third mode does not meet the trigger condition corresponding to the third mode.

[0367] If the fourth result corresponding to the second cell is the fifth result corresponding to the first method and satisfies the triggering condition corresponding to the first method, then the fourth result corresponding to the second cell can be called the first result; that is, the first result can be the fourth result under the condition that the first condition is met. The first condition can be that the fifth result corresponding to the first method satisfies the triggering condition corresponding to the first method.

[0368] If the fourth result corresponding to the second cell satisfies the triggering condition corresponding to the second method, then the fourth result corresponding to the second cell can be called the second result; that is, the second result can be the fourth result under the condition that the second condition is met. The second condition can be that the fifth result corresponding to the second method satisfies the triggering condition corresponding to the second method.

[0369] If the fourth result corresponding to the second cell satisfies the triggering condition corresponding to the third method, then the fourth result corresponding to the second cell can be called the third result; that is, the third result can be the fourth result under the condition that the third condition is met. The third condition can be that the fifth result corresponding to the third method satisfies the triggering condition corresponding to the third method.

[0370] The following explains the triggering conditions corresponding to the switchable mode.

[0371] When the switchable mode is set to the first mode, the triggering conditions corresponding to the first mode may include triggering conditions corresponding to Layer 1 measurement events. Layer 1 measurement events may refer to beam-level measurement events. The first measurement object may be the first beam. The first beam may be used to indicate the beam of the second cell. The first beam may also be referred to as a candidate beam or a neighboring beam. The second measurement object may be the second beam. The second beam may be used to indicate the beam of the first cell.

[0372] The second beam can also be called the service beam. Therefore, the first signal can be used to indicate the signal quality of the first beam.

[0373] The second signal quality can be the signal quality of the second beam.

[0374] The triggering condition corresponding to the Layer 1 measurement event (i.e., the triggering condition corresponding to the first method) may include at least one of the following: the second signal quality is less than the fourth threshold, the first signal quality is better than the second signal quality, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold. The sixth threshold may be greater than the fifth threshold.

[0375] When the switchable mode is set to the second mode, the first measurement object can be the second cell. The second measurement object can be the first cell. Therefore, the first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell.

[0376] The triggering conditions corresponding to the second method may include at least one of the following: the first signal quality is better than the second signal quality; the first signal quality is greater than a first threshold; the second signal quality is less than a second threshold and the first signal quality is greater than a third threshold; or the second signal quality is less than a thirteenth threshold. The third threshold may be greater than the second threshold. The second cell may be a neighboring cell of the first cell.

[0377] When the switchable mode is the third mode, the first measurement object can be the second cell. The second measurement object can be the first cell. Therefore, the first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell.

[0378] The triggering conditions corresponding to the third method may include at least one of the following: the first signal quality is better than the second signal quality; the first signal quality is greater than the fourteenth threshold; the second signal quality is less than the fifteenth threshold and the first signal threshold is greater than the sixteenth threshold; or the second signal quality is less than the seventeenth threshold. The sixteenth threshold may be greater than the fifteenth threshold. The second cell may be a neighboring cell of the first cell.

[0379] The following explains how the terminal device determines the fifth result corresponding to the switchable mode.

[0380] The fifth result corresponding to the switchable mode can be obtained by the terminal device measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell.

[0381] When the switchable mode is the first mode, the fifth result corresponding to the first mode can be obtained by the terminal device measuring the first signal quality and / or the second signal quality based on the first configuration information corresponding to the second cell. When the switchable mode is the second mode, the fifth result corresponding to the second mode can be obtained by the terminal device measuring the first signal quality and / or the second signal quality based on the second configuration information corresponding to the second cell. When the switchable mode is the third mode, the fifth result corresponding to the third mode can be obtained by the terminal device measuring the first signal quality and / or the second signal quality based on the third configuration information corresponding to the second cell.

[0382] The following explanation focuses on the first piece of information.

[0383] The first information can be used to indicate that, in the event that at least two of the first, second, or third modes coexist, cell handover shall be performed based on the second information. The second information can be used to indicate information related to the handover priority of the first, second, and third modes.

[0384] The following explanation addresses the scenario where at least two of the first, second, or third methods coexist.

[0385] As one implementation method, the first method and the second method coexist, that is, the CLTM based on layer 1 measurement event triggering and the CLTM based on layer 3 measurement event triggering coexist.

[0386] As another implementation, the first and third methods coexist, namely, CLTM based on layer 1 measurement event triggering and CHO coexist.

[0387] As another implementation method, the second and third methods coexist.

[0388] As another implementation method, the first, second and third methods coexist, namely, the CLTM triggered by layer 1 measurement events, the CLTM triggered by layer 3 measurement events, and the CHO coexist.

[0389] In S807, the first access network device sends the first information to the terminal device.

[0390] According to embodiments of this application, the first information can be carried in an RRC reconfiguration message. For example, an RRC reconfiguration message may include the first information. The first information may also be carried in other signaling, and embodiments of this application do not limit the method of carrying the first information. The first information may include second information, fourth information, and third information corresponding to at least one second cell.

[0391] In S808, the terminal device determines at least one fourth result corresponding to each of the at least one second cell based on the fourth information and the third information corresponding to each of the at least one second cell.

[0392] According to embodiments of this application, for any second cell among at least one second cell, if the handover mode corresponding to that second cell includes a first mode, the fourth configuration information may include a triggering condition corresponding to the first mode. The third information may include the first configuration information. The first configuration information may include the fourth measurement configuration.

[0393] The terminal device measures the first signal quality and / or the second signal quality according to the fourth measurement configuration to obtain a fifth result corresponding to the first method. Based on the fifth result corresponding to the first method and the triggering condition, a fourth result corresponding to the first method is determined. For example, if the fifth result corresponding to the first method satisfies the triggering condition corresponding to the first method, a first result is obtained.

[0394] If the handover mode corresponding to the second cell includes the second mode, the fourth information may include the triggering condition corresponding to the second mode. The third information may include the second configuration information. The second configuration information may include the fifth measurement configuration.

[0395] The terminal device measures the first signal quality and / or the second signal quality according to the fifth measurement configuration, obtaining a fifth result corresponding to the second method. Based on the fifth result corresponding to the second method and the triggering condition, a fourth result corresponding to the second method is determined. For example, if the fifth result corresponding to the second method satisfies the triggering condition corresponding to the second method, a second result is obtained.

[0396] If the handover mode corresponding to the second cell includes the third mode, the fourth information may include the triggering conditions corresponding to the third mode. The third information may include third configuration information. The third configuration information may include sixth measurement configuration.

[0397] The terminal device measures the first signal quality and / or the second signal quality according to the sixth measurement configuration, obtaining a fifth result corresponding to the third method. Based on the fifth result corresponding to the third method and the triggering condition, a fourth result corresponding to the third method is determined. For example, if the fifth result corresponding to the third method satisfies the triggering condition corresponding to the third method, a third result is obtained.

[0398] In S809, the terminal device determines the target second cell from at least one second cell based on the second information and at least one fourth result corresponding to each of the at least one second cell.

[0399] The method by which a terminal device determines a target second cell from at least one second cell based on the second information and at least one fourth result corresponding to each of the at least one second cell can be achieved as follows.

[0400] The terminal device can determine whether the first situation or the second situation exists based on the fourth result corresponding to each of the at least one second cell. The first situation and the second situation are explained below.

[0401] In the first case, the terminal device can determine whether there is at least one first result, at least one second result, and no third result among the at least one fourth result based on the fourth result corresponding to each of the at least one second cell.

[0402] The terminal device can, based on second information, determine a target second cell from the second cells corresponding to each of the at least one second result, if it determines that at least one first result and at least one second result exist in at least one fourth result, but no third result exists. In this case, the target second cell can be the second cell corresponding to the second result, that is, the target second cell can be a second cell supporting the second method. As one implementation, the target second cell can be the second cell corresponding to the optimal first signal quality. The optimal first signal can be the best first signal quality among the first signal qualities corresponding to each of the at least one second result.

[0403] If the handover from the first cell to the target second cell fails N times, the target second cell can be determined from the second cells corresponding to at least one of the first results based on the second information, so that the cell handover can be performed using the first method.

[0404] In the second scenario, the terminal device can determine a target second cell from the second cells corresponding to each of the at least one third result, based on the second information, if it determines that at least one of the at least one fourth result exists and at least one of the following exists: at least one first result or at least one second result. In this case, the target second cell can be the second cell corresponding to the third result, that is, the target second cell can be a second cell supporting the third method. As one implementation, the target second cell can be the second cell corresponding to the optimal first signal quality. The optimal first signal can be the best first signal quality among the first signal qualities corresponding to each of the at least one third result.

[0405] If the handover from the first cell to the target second cell fails N times, the target second cell can be determined from the second cells corresponding to at least one first result and / or the second cells corresponding to at least one second result, based on the second information. As one implementation, if at least one first result exists, the target second cell is determined from the second cells corresponding to at least one first result based on the second information. If at least one second result exists, the target second cell is determined from the second cells corresponding to at least one second result based on the second information. If both at least one first result and at least one second result exist, the target second cell is determined from the second cells corresponding to at least one second result and / or the second cells corresponding to at least one first result based on the second information. For example, if both at least one first result and at least one second result exist, the target second cell is determined from the second cells corresponding to at least one second result based on the second information. Optionally, if both at least one first result and at least one second result exist, the target second cell is determined from the second cells corresponding to at least one first result based on the second information.

[0406] In S810, terminal devices can switch from the first cell to the target second cell.

[0407] According to an embodiment of this application, the first cell can be the original cell.

[0408] As one implementation method, during the handover process from the first cell to the target second cell, the terminal device can maintain data transmission with the first cell. This allows the terminal device to transmit data during the handover process, reducing interruption latency and improving the performance of the communication system and user experience. The process of handover from the first cell to the target second cell can refer to the process of attempting to handover from the first cell to the target second cell.

[0409] Upon successful handover from the first cell to the target second cell, the third access network device corresponding to the target second cell can pre-configure the target second cell's TA (Tracking Location) via RRC (Registered Access Control) or MAC CE (Machine-Assisted CE) signaling. Optionally, the terminal device can obtain the target second cell's TA through contention-based random access or non-contention-based random access. Optionally, the third access network device corresponding to the target second cell can determine the target second cell's TA based on the terminal device's location information.

[0410] Figure 9 A flowchart illustrating another cell handover method provided in this application embodiment. This method can be applied to a terminal device, a first access network device, and a third access network device. The first access network device operates in NES mode.

[0411] like Figure 9 As shown, the method includes S901-S909.

[0412] In S901, the terminal device sends the fourth measurement result to the first access network device.

[0413] In S902, the first access network device determines the fourth decision result based on the fourth measurement result.

[0414] In S903, if the fourth decision result is to execute at least one of the first mode, the second mode, or the third mode, the first access network device sends a second request to at least one third access network device.

[0415] In S904, at least one third access network device responds to the second request and determines third information corresponding to each of the at least one third access network device.

[0416] According to embodiments of this application, the third information can be used to indicate at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information can be configuration information corresponding to a first mode of NES mode. The second configuration information can be configuration information corresponding to a second mode of NES mode. The third configuration information can be configuration information corresponding to a third mode of NES mode or configuration information corresponding to a third mode of non-NES mode.

[0417] In S905, at least one third access network device sends third information corresponding to each of the at least one third access network device to the first access network device.

[0418] In S906, the first access network device determines the first information based on the second information, the fourth information, and the third information corresponding to at least one third access network device.

[0419] According to embodiments of this application, the first information can be used to indicate that, in the case of at least two of the first mode corresponding to NES mode, the second mode corresponding to NES mode, or the third mode corresponding to NES mode coexisting, cell handover is performed based on the second information corresponding to NES mode. The second information corresponding to NES mode can be used to indicate information related to the handover priority of the first mode, the second mode, and the third mode. The fourth information may include at least two of the following: a trigger condition corresponding to the first mode of NES mode, a trigger condition corresponding to the second mode of NES mode, or a trigger condition corresponding to the second mode of NES mode.

[0420] The first method corresponding to NES mode can be a CLTM triggered based on a first event in NES mode. The second method corresponding to NES mode can be a CLTM triggered based on a second event in NES mode. The third method corresponding to NES mode can be a CHO in NES mode. Optionally, the third method corresponding to non-NES mode can be a CHO in non-NES mode.

[0421] The second information can be used to indicate information related to the switching priority of the first, second, and third methods, as follows.

[0422] As one implementation, in the first case, the handover priority corresponding to the second method of NES mode is the highest. Alternatively, if the cell handover fails N times using the second method of NES mode, the cell handover is performed using the first method of NES mode. N can be an integer greater than or equal to 1.

[0423] In the second scenario, the handover priority corresponding to the third method in NES mode is the highest. Alternatively, if the cell handover fails N times using the third method in NES mode, another method may be used to perform the cell handover.

[0424] The first case can indicate the existence of at least one first result, at least one second result, and no third result. The second case can indicate the existence of at least one third result and at least one of the following: the existence of at least one first result or the existence of at least one second result. The first result can be a trigger condition that satisfies the trigger condition corresponding to the first mode of NES mode. The second result can be a trigger condition that satisfies the trigger condition corresponding to the second mode of NES mode. The third result can be a trigger condition that satisfies the trigger condition corresponding to the third mode of non-NES mode or the trigger condition corresponding to the third mode of NES mode.

[0425] If at least one first result exists, the other methods can be the first method. If at least one second result exists, the other methods can be the second method. If at least one first result exists and at least one second result is stored, the other methods can be either the first method or the second method.

[0426] The following explains the triggering conditions corresponding to the switchable mode of NES.

[0427] In the first mode where the switchable mode is NES, the triggering conditions corresponding to the first mode of NES can include triggering conditions corresponding to Layer 1 measurement events in NES mode. Layer 1 measurement events can refer to beam-level measurement events. The first measurement object can be a first beam. The first beam can be used to indicate the beam of the second cell. The first beam can also be called a candidate beam or a neighboring beam. The second measurement object can be a second beam. The second beam can be used to indicate the beam of the first cell. The second beam can also be called a serving beam. Therefore, the first signal can be used to indicate the signal quality of the first beam. The second signal quality can be the signal quality of the second beam.

[0428] The triggering condition corresponding to the Layer 1 measurement event in NES mode (i.e., the triggering condition corresponding to the first mode of NES mode) can be used to indicate at least one of the following: the second signal quality is less than the fourth threshold, the first signal quality is better than the second signal quality, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold. The fourth threshold, fifth threshold, sixth threshold, and seventh threshold can be the thresholds corresponding to the first mode of NES mode.

[0429] It should be noted that the values ​​of the thresholds involved in the triggering conditions corresponding to the first method of NES mode can differ from the values ​​of the thresholds involved in the triggering conditions corresponding to the first method of non-NES mode. For example, the fourth threshold corresponding to the first method of NES mode can differ from the fourth threshold corresponding to the first method of non-NES mode. The fifth threshold corresponding to the first method of NES mode can differ from the fifth threshold corresponding to the first method of non-NES mode. The sixth threshold corresponding to the first method of NES mode can differ from the sixth threshold corresponding to the first method of non-NES mode. The seventh threshold corresponding to the first method of NES mode can differ from the seventh threshold corresponding to the first method of non-NES mode.

[0430] In the second mode, where the switchable mode is NES, the first measurement object can be the second cell. The second measurement object can be the first cell. Therefore, the first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell.

[0431] The triggering condition corresponding to the second mode of NES mode can be used to indicate at least one of the following: a first signal quality is better than a second signal quality, a first signal quality is greater than a first threshold, a second signal quality is less than a second threshold and a first signal quality is greater than a third threshold, or a second signal quality is less than a thirteenth threshold. The third threshold can be greater than the second threshold. The first threshold, second threshold, third threshold, and thirteenth threshold can be thresholds corresponding to the second mode of NES mode.

[0432] It should be noted that the values ​​of the thresholds involved in the triggering conditions corresponding to the second method of NES mode can differ from the values ​​of the thresholds involved in the triggering conditions corresponding to the second method of non-NES mode. For example, the first threshold corresponding to the second method of NES mode can differ from the first threshold corresponding to the second method of non-NES mode. The second threshold corresponding to the second method of NES mode can differ from the second threshold corresponding to the second method of non-NES mode. The third threshold corresponding to the second method of NES mode can differ from the third threshold corresponding to the second method of non-NES mode. The thirteenth threshold corresponding to the second method of NES mode can differ from the thirteenth threshold corresponding to the second method of non-NES mode.

[0433] In the third mode, where the switchable mode is NES, the first measurement object can be the second cell. The second measurement object can be the first cell. Therefore, the first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell.

[0434] The triggering condition corresponding to the third mode of NES mode can be used for at least one of the following: the first signal quality is better than the second signal quality; the first signal quality is greater than the fourteenth threshold; the second signal quality is less than the fifteenth threshold and the first signal threshold is greater than the sixteenth threshold; or the second signal quality is less than the seventeenth threshold. The sixteenth threshold can be greater than the fifteenth threshold. The fourteenth, fifteenth, sixteenth, and seventeenth thresholds can be the thresholds corresponding to the third mode of NES mode.

[0435] In the case of the third mode, which is switchable to a non-NES mode, the triggering condition corresponding to the third mode in non-NES mode can be used for at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than the fourteenth threshold, the second signal quality is less than the fifteenth threshold and the first signal threshold is greater than the sixteenth threshold, or the second signal quality is less than the seventeenth threshold. The sixteenth threshold can be greater than the fifteenth threshold. The fourteenth, fifteenth, sixteenth, and seventeenth thresholds can be the thresholds corresponding to the third mode in non-NES mode.

[0436] It should be noted that the threshold values ​​involved in the triggering conditions corresponding to the third method of NES mode can differ from the threshold values ​​involved in the triggering conditions corresponding to the third method of non-NES mode. For example, the fourteenth threshold corresponding to the third method of NES mode can differ from the fourteenth threshold corresponding to the third method of non-NES mode. The fifteenth threshold corresponding to the third method of NES mode can differ from the fifteenth threshold corresponding to the third method of non-NES mode. The sixteenth threshold corresponding to the third method of NES mode can differ from the sixteenth threshold corresponding to the third method of non-NES mode. The seventeenth threshold corresponding to the third method of NES mode can differ from the seventeenth threshold corresponding to the third method of non-NES mode.

[0437] For further explanations regarding the second, fourth, third, and first information, please refer to the corresponding sections above; they will not be repeated here.

[0438] In S907, the first access network device sends the first information to the terminal device.

[0439] According to the embodiments of this application, the description of the first information can be found in S807 above, and will not be repeated here.

[0440] In S908, the first access network device sends the fifth information to the terminal device.

[0441] According to embodiments of this application, the fifth information may include at least one of the following: a first mode corresponding to the NES mode, a second mode corresponding to the NES mode, or a third mode corresponding to the NES mode. The fifth information can be used to instruct the terminal device, upon receiving the fifth information, to determine a fourth result based on the third information corresponding to at least one of the first mode, the second mode, or the third mode of the NES mode.

[0442] The following section explains how the fifth piece of information is carried.

[0443] As one implementation, the fifth piece of information can be carried in the DCI. The DCI can include a first field. The first field can be configured as a first identifier. The first identifier can be used to indicate at least one of the following: triggering a first mode corresponding to NES mode, a second mode corresponding to NES mode, or a third mode corresponding to NES mode. The first field can be a 1-bit field. For example, the first identifier can be 1. The DCI can be DCI Format 2_9.

[0444] As another implementation, where the fifth information can be used to indicate at least one of the first mode being a first mode corresponding to NES mode or the second mode being a second mode corresponding to NES mode, the fifth information can be an NES mode indication (i.e., NES-Mode Indication). The NES mode indication can include a second field. The second field can be configured as a second identifier. The second identifier can be used to indicate that the third mode is a third mode corresponding to NES mode. The second field can be a 1-bit field. For example, the second identifier can be 1. Therefore, if the second identifier is used to indicate that the third mode is a third mode corresponding to NES mode, then, in the case of having first configuration information corresponding to the first mode and / or configuration information corresponding to the second mode, it can also be used to indicate that the first mode is a first mode corresponding to NES mode and / or the second mode is a second mode corresponding to NES mode.

[0445] It should be noted that the execution order of S908 is not limited in this embodiment, and it can be performed before S907. For example, the first information can be carried in an RRC reconfiguration message, and S908 can be executed after the terminal device sends an RRC reconfiguration completion message to the first access network device.

[0446] In S909, the terminal device determines at least one fourth result corresponding to each of the at least one second cell based on the fifth information, the fourth information, and the third information corresponding to each of the at least one second cell.

[0447] According to embodiments of this application, the fourth result corresponding to the second cell can be used to indicate whether the fifth result corresponding to the handover mode satisfies the triggering condition corresponding to the handover mode. The handover mode can be a handover mode supported by the second cell. The handover mode can be used to indicate at least one of the following: a first mode corresponding to the NES mode, a second mode corresponding to the NES mode, or a third mode corresponding to the NES mode. The fifth result can be obtained by measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell.

[0448] The first result can be the fourth result under the condition that the first condition is met. The first condition can be the fifth result corresponding to the first method of NES mode, satisfying the trigger condition corresponding to the first method of NES mode. The second result can be the fourth result under the condition that the second condition is met. The second condition can be the fifth result corresponding to the second method of NES mode, satisfying the trigger condition corresponding to the second method of NES mode. The third result can be the fourth result under the condition that the third condition is met. The third condition can be the fifth result corresponding to the third method of NES mode, satisfying the trigger condition corresponding to the third method of NES mode.

[0449] To determine at least one fourth result corresponding to at least one second cell based on the fifth information, the fourth information, and the third information corresponding to each of the at least one second cell, the following method can be used.

[0450] As one implementation, for any second cell in at least one second cell, if the handoverable mode corresponding to that second cell includes a first mode of NES mode, the fourth information may include the triggering condition corresponding to the first mode of NES mode. The third information may include the first configuration information. The first configuration information may include the fourth measurement configuration corresponding to the first mode of NES mode.

[0451] The terminal device measures the first signal quality and / or the second signal quality according to the fourth measurement configuration corresponding to the first mode of NES mode, and obtains a fifth result corresponding to the first mode of NES mode. Based on the fifth result corresponding to the first mode of NES mode and the triggering condition, the fourth result corresponding to the first mode of NES mode is determined. For example, if the fifth result corresponding to the first mode of NES mode satisfies the triggering condition corresponding to the first mode of NES mode, the first result corresponding to NES mode is obtained.

[0452] If the handover mode corresponding to the second cell includes the second mode of NES, the fourth information may include the triggering conditions corresponding to the second mode of NES. The third information may include the second configuration information. The second configuration information may include the fifth measurement configuration corresponding to the second mode of NES.

[0453] The terminal device measures the first signal quality and / or the second signal quality according to the fifth measurement configuration corresponding to the second method of NES mode, and obtains a fifth result corresponding to the second method of NES mode. Based on the fifth result corresponding to the second method of NES mode and the triggering condition, a fourth result corresponding to the second method of NES mode is determined. For example, if the fifth result corresponding to the second method of NES mode satisfies the triggering condition corresponding to the second method of NES mode, a second result is obtained.

[0454] If the handover mode corresponding to the second cell includes a third mode of NES mode, the fourth information may include the triggering conditions corresponding to the third mode of NES. The third information may include third configuration information. The third configuration information may include a sixth measurement configuration corresponding to the third mode of NES mode.

[0455] The terminal device measures the first signal quality and / or the second signal quality according to the sixth measurement configuration corresponding to the third method of NES mode, and obtains the fifth result corresponding to the third method of NES mode. Based on the fifth result corresponding to the third method of NES mode and the triggering condition, a fourth result corresponding to the third method is determined. For example, if the fifth result corresponding to the third method of NES mode satisfies the triggering condition corresponding to the third method of NES mode, the third result is obtained.

[0456] In S910, the terminal device determines the target second cell from at least one second cell based on the second information and at least one fourth result corresponding to each of the at least one second cell.

[0457] In the S911, terminal devices can switch from the first cell to the target second cell.

[0458] It should be noted that, for Figure 9 For further explanation, please refer to the relevant sections above, which will not be repeated here.

[0459] Figure 10 This is a flowchart illustrating an information processing method provided in an embodiment of this application. The method can be applied to a terminal device and a second access network device.

[0460] like Figure 10 As shown, the method includes S1010-S1040.

[0461] In S1010, the terminal device records the sixth information in the event of radio link failure and / or cell handover failure.

[0462] According to embodiments of this application, the sixth information may include at least one of the following: seventh information, eighth information, ninth information, tenth information, or eleventh information. The seventh information may be used to indicate information related to the measurement result.

[0463] The eighth piece of information can be used to indicate information related to the cell. The ninth piece of information can be used to indicate information related to time. The tenth piece of information can be used to indicate information related to measurement events. The eleventh piece of information can be used to indicate information related to TA (Transient Aspect).

[0464] As one implementation, the seventh piece of information may include at least one of the following: beam measurement results, measurement results corresponding to the original cell, measurement results corresponding to the candidate cell, or measurement results corresponding to neighboring cells. Neighboring cells can be used to indicate the neighboring cells of the original cell. Candidate cells can be candidate cells configured for the original cell. Beam measurement results can be obtained based on Layer 1 measurement events.

[0465] As one implementation, the eighth piece of information may include at least one of the following: a third identifier, a fourth identifier, indication information as to whether the candidate cell supports the first and / or second methods, indication information as to whether the candidate cell supports CLTM, indication information as to whether the neighboring cell supports the first and / or second methods, indication information as to whether the neighboring cell supports CLTM, indication information as to whether the candidate cell supports a third-party method, indication information as to whether the neighboring cell supports a third-party method, whether the neighboring cell has configured CG (configured grant, pre-configured grant or semi-static scheduling grant) resources, the type of the last handover, information on candidate cells that meet the triggering conditions, and information on candidate cells that meet the triggering conditions corresponding to the first method or the triggering conditions corresponding to the second method. The third identifier may be used to indicate a cell where the handover failed. The fourth identifier may be used to indicate a cell that reconnected. The type of the last handover may include CLTM, the first method, the second method, or the third method.

[0466] As one implementation, the ninth information may include at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration. The first duration may be the duration between the first and second moments. The first moment may be the earliest moment at which the triggering condition is satisfied, i.e., the first moment may be the moment at which the triggering condition is assessed to be satisfied. The second moment may be the moment at which cell handover fails or radio link fails. The second duration may be the duration between the third and fourth moments. The third moment may be the moment at which the first triggering condition corresponding to the first method is satisfied, i.e., the third moment may be the earliest moment at which the first result is determined or the third moment may be the moment at which the triggering condition corresponding to the first method is assessed to be satisfied. The fourth moment may be the moment at which the first triggering condition corresponding to the second method is satisfied, i.e., the fourth moment may be the earliest moment at which the second result is determined or the fourth moment may be the moment at which the triggering condition corresponding to the second method is assessed to be satisfied. The third duration may be the duration between the fourth and third moments. The fourth duration may be the duration between the third and fifth moments. The fifth moment may be the moment at which the second triggering condition corresponding to the first method is satisfied. The fifth duration may be the duration between the fourth and sixth moments. The sixth moment can be the moment when the triggering condition corresponding to the second method is determined.

[0467] As one implementation, the tenth information may include at least one of the following: an event type that meets the triggering condition, an event that meets the triggering condition, and the number of Layer 1 measurement events or the number of Layer 3 measurement events. The event type may include at least one of the following: a Layer 1 measurement event, a Layer 2 measurement event, or a Layer 3 measurement event. The event may include at least one of the following: event A3, event A4, event A5, event A3 corresponding to LTM, or event A5 corresponding to LTM. The Layer 1 measurement event may be the first event. The Layer 3 measurement event may be the second event.

[0468] In one implementation, the eleventh information may include at least one of the following: an indication of whether the TA of a neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration. The sixth duration may be the remaining duration of the TA of a neighboring cell or the remaining duration of the TA of a candidate cell. The seventh duration may be the remaining duration of the TA of the cell that failed the handover.

[0469] In S1020, the terminal device connects to the second access network device.

[0470] In S1030, the second access network device sends a first request to the terminal device.

[0471] According to an embodiment of this application, the first request can be used to request the terminal device to send the sixth information.

[0472] As one implementation, the first report may include the sixth information. A first request may be used to request the terminal device to send the first report. The first report may be an RLF-Report.

[0473] As one implementation, the second access network device can send a first request to the terminal device via the first signaling. Optionally, the second access network device can send a first report to the terminal device via the first signaling. For example, the first signaling can be RRC signaling. RRC signaling may include UEInformationRequest signaling.

[0474] In S1040, the terminal device responds to the first request and sends the sixth information to the second access network device.

[0475] In one implementation, the terminal device may send sixth information to the second access network device via second signaling in response to the first request. The second signaling may be RRC signaling. RRC signaling may include UEInformationResponse signaling.

[0476] It should be noted that the embodiments of this application do not limit the way the first request and the sixth information are carried.

[0477] It should be noted that the first to seventeenth thresholds in this application embodiment can be configured according to actual business needs, and are not limited here.

[0478] It should be noted that all names involved in the embodiments of this application can be defined as other names, as long as they can achieve the function of each module, and no specific restrictions are placed on the names of the modules.

[0479] Figure 11 A flowchart illustrating another cell handover method provided in this application embodiment. This method can be applied to terminal devices.

[0480] like Figure 11 As shown, the method includes S1110-S1120.

[0481] In S1110, the first information is received from the first access network device.

[0482] According to embodiments of this application, the first information can be used to indicate that, in the event that at least two of the first, second, or third modes coexist, cell handover is performed based on the second information. The second information can be used to indicate information related to the handover priority of the first, second, and third modes.

[0483] The first approach can be a CLTM triggered by a first event. The second approach can be a CLTM triggered by a second event. The third approach can be a conditional toggle CHO. The first event can be a layer 1 measurement event. The second event can be a layer 3 measurement event.

[0484] As one implementation method, the first information can be carried in an RRC reconfiguration message.

[0485] It should be noted that explanations regarding the first information, the second information, the first method, the second method, and the third-party method can be found in the corresponding sections above, and will not be repeated here.

[0486] The second information can be used to indicate information related to the switching priority of the first, second, and third methods, as follows.

[0487] As one implementation, in the first case, the handover priority corresponding to the second method is the highest. Alternatively, if the cell handover fails N times using the second method, the cell handover is performed using the first method. The first case can be used to indicate that there is at least one first result, at least one second result, and no third result. N can be an integer greater than or equal to 1.

[0488] In the second scenario, the handover priority corresponding to the third method is the highest. Alternatively, if the cell handover fails N times using the third method, another method may be used. The second scenario can indicate the existence of at least one third result and at least one of the following: at least one first result or at least one second result. In the case of at least one first result, the other method can be the first method. In the case of at least one second result, the other method can be the second method. In the case of at least one first result and at least one second result, the other method can be either the first method or the second method.

[0489] The first result can be the result that satisfies the triggering condition corresponding to the first method. The second result can be the result that satisfies the triggering condition corresponding to the second method. The third result can be the result that satisfies the triggering condition corresponding to the third method.

[0490] It should be noted that the explanations for the first and second scenarios can be found in the corresponding sections above, and will not be repeated here.

[0491] In S1120, cell handover is performed based on the first information.

[0492] Regarding the first information, it may include second information, fourth information, and third information corresponding to at least one second cell. The second cell may be a candidate cell. The third information may indicate at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information may be configuration information corresponding to a first method. The second configuration information may be configuration information corresponding to a second method. The third configuration information may be configuration information corresponding to a third method. The fourth information may include at least two of the following: a trigger condition corresponding to a first method, a trigger condition corresponding to a second method, or a trigger condition corresponding to a third method.

[0493] The following method can be used to implement cell handover based on the first piece of information.

[0494] As one implementation, at least one fourth result corresponding to each of the at least one second cell is determined based on the fourth information and the third information corresponding to each of the at least one second cell. A target second cell is determined from the at least one second cell based on the second information and the at least one fourth result corresponding to each of the at least one second cell. The user then switches from the first cell to the target second cell.

[0495] The fourth result corresponding to the second cell can be used to indicate whether the fifth result corresponding to the handover mode meets the triggering condition corresponding to the handover mode. The handover mode can be a handover mode supported by the second cell. The handover mode can be used to indicate at least one of the following: a first mode, a second mode, or a third mode. The fifth result can be obtained by measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell.

[0496] The first signal quality can be the signal quality of the first measurement object. The first measurement object can be used to indicate a second cell or a first beam. The first beam can be used to indicate the beam of the second cell. The second signal quality can be the signal quality of the second measurement object. The second measurement object can be used to indicate a first cell or a second beam. The second beam can be used to indicate the beam of the first cell. The first cell can be the original cell.

[0497] The first result can be the fourth result if the first condition is met. The first condition can be the fifth result corresponding to the first method satisfying the triggering condition corresponding to the first method. The second result can be the fourth result if the second condition is met. The second condition can be the fifth result corresponding to the second method satisfying the triggering condition corresponding to the second method. The third result can be the fourth result if the third condition is met. The third condition can be the fifth result corresponding to the third method satisfying the triggering condition corresponding to the third method.

[0498] Since the target second cell can be determined from at least one second cell based on second information and at least one fourth result corresponding to each of the at least one second cell, and the second information indicates that in the first case, the handover priority corresponding to the second method is the highest, and in the second case, the handover priority corresponding to the third method is the highest, the robustness of the measurement results obtained based on the second method and the robustness of the measurement results obtained based on the third method are both high. Therefore, the accuracy of determining the target cell is improved, thereby improving the cell handover success rate. Furthermore, if cell handover fails N times using the highest priority handover method, using other methods to perform cell handover improves the handover success rate.

[0499] It should be noted that the explanations of the third information, the fifth result, the fourth result, the first condition, the second condition, the third condition, the first signal quality, and the second signal quality can be found in the corresponding sections above, and will not be repeated here.

[0500] The method for determining the target second cell from at least one second cell based on the second information and at least one fourth result corresponding to each of the at least one second cell can be achieved as follows.

[0501] As one implementation, if at least one fourth result corresponding to each of at least one second cell satisfies the first condition, the target second cell is determined from the second cells corresponding to each of the at least one second result based on the second information. Alternatively, if the handover from the first cell to the target second cell fails N times, the target second cell is determined from the second cells corresponding to each of the at least one first result based on the second information. N can be an integer greater than or equal to 1.

[0502] If at least one fourth result corresponding to each of at least one second cell satisfies the second condition, a target second cell is determined from the second cells corresponding to each of at least one third result, based on the second information. Alternatively, if the handover from the first cell to the target second cell fails N times, a target second cell is determined from the second cells corresponding to each of at least one first result and / or the second cells corresponding to each of at least one second result, based on the second information.

[0503] Since the target second cell is determined based on either the first or second condition, the handover method is the second method when the first condition is met, and the handover method is the third method when the second condition is met. Both the measurement results obtained using the second method and those obtained using the third method have higher robustness, thus improving the accuracy of target cell determination and consequently increasing the cell handover success rate. Furthermore, even if the highest-priority handover method fails N times, using other methods to perform the handover further improves the handover success rate.

[0504] It should be noted that for the explanation of how to determine whether the fourth result corresponding to at least one second cell satisfies the first condition or the second condition, please refer to the relevant section above, which will not be repeated here.

[0505] The triggering conditions corresponding to the second method are explained below.

[0506] As one implementation, when the first measurement object is the second cell and the second measurement object is the first cell, the triggering condition corresponding to the second method may include at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than a first threshold, or the second signal quality is less than the second threshold and the first signal quality is greater than a third threshold. The third threshold may be greater than the second threshold.

[0507] As one implementation method, when the first measurement object is the first beam and the second measurement object is the second beam, the triggering condition corresponding to the first method may include at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than the fourth threshold, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold, wherein the seventh threshold may be greater than the sixth threshold.

[0508] It should be noted that the explanations of the triggering conditions corresponding to the second method and the first method can be found in the corresponding sections above, and will not be repeated here.

[0509] When the first access network device operates in NES mode, the first method can be the first method corresponding to NES mode. And / or, the second method can be the second method corresponding to NES mode. And / or, the third method can be the third method corresponding to NES mode.

[0510] When the first access network device operates in NES mode, cell handover can be achieved when at least two of the first, second, or third modes of NES mode coexist, by configuring the first mode to be the first mode corresponding to NES mode, the second mode to be the second mode corresponding to NES mode, and the third mode to be the third mode corresponding to NES mode.

[0511] To determine the fourth result when the terminal device is operating in NES mode, the following method can be used.

[0512] In one implementation, the terminal device may receive fifth information from the first access network device. The fifth information may include at least one of the following: the first mode is a first mode corresponding to the NES mode, the second mode is a second mode corresponding to the NES mode, or the third mode is a third mode corresponding to the NES mode.

[0513] The terminal device can determine at least one fourth result corresponding to each of the at least one second cell based on the fifth information, the fourth information, and the third information corresponding to each of the at least one second cell.

[0514] The method for carrying the fifth piece of information can be implemented in the following way.

[0515] As one implementation, the fifth piece of information can be carried in the DCI. The first field of the DCI can be configured as a first identifier. The first identifier can be used to indicate at least one of the following: triggering the first mode corresponding to the NES mode, the second mode corresponding to the NES mode, or the third mode corresponding to the NES mode.

[0516] As an alternative implementation, where the fifth information can be used to indicate that the first mode is the first mode corresponding to NES mode and / or the second mode is the second mode corresponding to NES mode, the fifth information can be an NES mode indicator. The second field included in the NES mode indicator can be configured as a second identifier. The second identifier can be used to indicate that the third mode is the third mode corresponding to NES mode.

[0517] By carrying the fifth information in the DCI or using the fifth information as an NES mode indication, cell handover based on the fifth information is enabled for NES mode.

[0518] It should be noted that for explanations regarding NES mode, please refer to the relevant sections above, and will not be repeated here.

[0519] In the event of wireless link failure and / or cell handover failure, the terminal device can optimize the network in the following ways.

[0520] As one implementation method, the terminal device records the sixth information in the event of wireless link failure and / or cell handover failure.

[0521] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0522] Since the sixth information is obtained in the event of radio link failure or cell handover failure, it records the failure information. Furthermore, the sixth information may include at least one of the following: information related to measurement results, cell-related information, time-related information, information related to measurement events, or information related to TA (Transmission Action). Therefore, the sixth information provides relatively complete information, enabling the second access network device to optimize the network based on the sixth information and improve the success rate of subsequent handovers.

[0523] The following explanation addresses the seventh, eighth, ninth, tenth, and eleventh pieces of information.

[0524] As one implementation, the seventh piece of information may include at least one of the following: beam measurement results, measurement results corresponding to the first cell, measurement results corresponding to the second cell, or measurement results corresponding to a neighboring cell. The neighboring cell can be used to indicate the adjacent cells of the first cell. The beam measurement results can be obtained based on Layer 1 measurement events. The first cell can be the original cell. The second cell can be a candidate cell.

[0525] As one implementation, the eighth information may include at least one of the following: a third identifier, a fourth identifier, indication information as to whether the second cell supports the first and / or second methods, indication information as to whether the second cell supports CLTM, indication information as to whether neighboring cells support the first and / or second methods, indication information as to whether neighboring cells support CLTM, indication information as to whether the second cell supports a third-party method, indication information as to whether neighboring cells support a third-party method, whether neighboring cells are configured with CG resources, the type of the last handover, information of the second cell that meets the triggering conditions, information of the second cell that meets the triggering conditions corresponding to the first method, or information of the second cell that meets the triggering conditions corresponding to the second method. The third identifier may be used to indicate a cell where the handover failed. The fourth identifier may be used to indicate a cell that reconnected. The type of the last handover may include CLTM, the first method, the second method, or the third method.

[0526] As one implementation, the ninth information may include at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration. The first duration may be the duration between the first and second moments. The first moment may be the earliest moment at which the triggering condition is satisfied, i.e., the first moment may be the moment at which the triggering condition is assessed to be satisfied. The second moment may be the moment at which cell handover fails or radio link fails. The second duration may be the duration between the third and fourth moments. The third moment may be the moment at which the first triggering condition corresponding to the first method is satisfied, i.e., the third moment may be the earliest moment at which the first result is determined or the third moment may be the moment at which the triggering condition corresponding to the first method is assessed to be satisfied. The fourth moment may be the moment at which the first triggering condition corresponding to the second method is satisfied, i.e., the fourth moment may be the earliest moment at which the second result is determined or the fourth moment may be the moment at which the triggering condition corresponding to the second method is assessed to be satisfied. The third duration may be the duration between the fourth and third moments. The fourth duration may be the duration between the third and fifth moments. The fifth moment may be the moment at which the second triggering condition corresponding to the first method is satisfied. The fifth duration may be the duration between the fourth and sixth moments. The sixth moment can be the moment when the triggering condition corresponding to the second method is determined.

[0527] As one implementation, the tenth information may include at least one of the following: an event type that meets the triggering condition, an event that meets the triggering condition, and the number of Layer 1 measurement events or the number of Layer 3 measurement events. The event type may include at least one of the following: a Layer 1 measurement event, a Layer 2 measurement event, or a Layer 3 measurement event. The event may include at least one of the following: event A3, event A4, event A5, event A3 corresponding to LTM, or event A5 corresponding to LTM. The Layer 1 measurement event may be the first event. The Layer 3 measurement event may be the second event.

[0528] In one implementation, the eleventh information may include at least one of the following: an indication of whether the TA of a neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration. The sixth duration may be the remaining duration of the TA of the neighboring cell or the remaining duration of the TA of the second cell. The seventh duration may be the remaining duration of the TA of the cell that failed the handover.

[0529] As one implementation, the method may further include: the terminal device sending sixth information to the second access network device. The second access network device may be an access network device corresponding to the third cell or an access network device corresponding to the fourth cell. The third cell may be a cell where handover failed. The fourth cell may be different from the third cell.

[0530] The method for a terminal device to send the sixth information to a second access network device can be as follows.

[0531] Receive a first request from the second access network device. In response to the first request, send a sixth message to the second access network device.

[0532] According to the embodiments of this application, since the second information can be used to indicate information related to the handover priority of the first mode, the second mode and the third mode, and the first information can be used to indicate that when at least two of the first mode, the second mode or the third mode coexist, cell handover is performed according to the second information, thus realizing cell handover when at least two handover modes coexist.

[0533] Since the first method is CLTM triggered by layer 1 measurement events, the second method is CLTM triggered by layer 3 measurement events, and the third method is CHO, CHO can be a handover method based on layer 3 measurement events. The robustness of layer 3 measurement results can be better than that of layer 1 measurement results, and the robustness of CHO can be better than that of CLTM. Higher robustness can improve the handover success rate, improve anti-interference ability, and expand scenario compatibility. Therefore, from the perspective of the robustness of measurement results, the handover priority can be configured from high to low as the third method → ​​the second method → ​​the first method.

[0534] Based on this, since the first case can indicate the existence of at least one first result, at least one second result, and no third result, where the first result can be a trigger condition corresponding to the first method, the second result can be a trigger condition corresponding to the second method, and the third result can be a trigger condition corresponding to the third method, therefore, in the first case, the switching priority corresponding to the second method is determined to be the highest. Since the second case can indicate the existence of at least one third result and at least one of the following: at least one first result or at least one second result, therefore, in the second case, the switching priority corresponding to the third method is determined to be the highest.

[0535] Based on the above, cell handover can be achieved using either the second or third method when at least two of the first, second, or third methods coexist. Since the first and second methods are more robust, this improves the handover success rate and anti-interference capability, and expands scenario compatibility.

[0536] Furthermore, when cell handover fails N times using the highest priority handover method, using other methods to perform cell handover improves the handover success rate.

[0537] Figure 12 A flowchart illustrating another cell handover method provided in this application embodiment. This method can be applied to a first access network device.

[0538] like Figure 12 As shown, the method includes S1210.

[0539] In S1210, the first information is sent to the terminal device.

[0540] The first information can be used by the terminal device to perform cell handover based on the first information. The first information can also be used to indicate that, in the case of at least two of the first, second, or third modes coexisting, cell handover should be performed based on the second information.

[0541] The second information can be used to indicate information related to the handover priority of the first, second, and third methods. The first method can be a CLTM triggered by a first event. The second method can be a CLTM triggered by a second event. The third method can be a conditional handover CHO. The first event can be a Layer 1 measurement event. The second event can be a Layer 3 measurement event.

[0542] As one implementation, the second information can be used to indicate that, in the first case, the handover priority corresponding to the second method is the highest. Alternatively, if cell handover using the second method fails N times, cell handover can be performed using the first method. The first case can indicate that there is at least one first result, at least one second result, and no third result. The first result can be a trigger condition corresponding to the first method. The second result can be a trigger condition corresponding to the second method. The third result can be a trigger condition corresponding to the third method. N can be an integer greater than or equal to 1. And / or

[0543] In the second scenario, the handover priority corresponding to the third method is the highest. Alternatively, if the cell handover fails N times using the third method, another method may be used. The second scenario can indicate the existence of at least one third result and at least one of the following: at least one first result or at least one second result. If at least one first result exists, the other method can be the first method. If at least one second result exists, the other method can be the second method. If at least one first result exists and at least one second result exists, the other method can be either the first method or the second method.

[0544] As one implementation method, the triggering condition corresponding to the second method may include at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than a first threshold, or the second signal quality is less than the second threshold and the first signal quality is greater than a third threshold. The first signal quality can be the signal quality of the second cell. The second signal quality can be the signal quality of the first cell. The third threshold may be greater than the second threshold.

[0545] As one implementation, the triggering condition corresponding to the first method may include at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than a fourth threshold, the first signal quality is greater than a fifth threshold, or the second signal quality is less than a sixth threshold and the first signal quality is greater than a seventh threshold. The first signal quality may be the signal quality of a first beam. The first beam may be a beam used to indicate the second cell. The second signal quality may be the signal quality of a second beam. The second beam may be a beam used to indicate the first cell. The seventh threshold may be greater than the sixth threshold.

[0546] As one implementation method, the first method can be the first method corresponding to the network energy saving NES mode. And / or, the second method can be the second method corresponding to the NES mode. And / or, the third method can be the third method corresponding to the NES mode.

[0547] In one implementation, the first access network device can send fifth information to the terminal device. The fifth information may include at least one of the following: the first mode is a first mode corresponding to the NES mode, the second mode is a second mode corresponding to the NES mode, or the third mode is a third mode corresponding to the NES mode.

[0548] As one implementation, the fifth piece of information can be carried in the DCI. The first field of the DCI can be configured as a first identifier. The first identifier can be used to indicate at least one of the following: triggering the first mode corresponding to the NES mode, the second mode corresponding to the NES mode, or the third mode corresponding to the NES mode.

[0549] As an alternative implementation, where the fifth information can be used to indicate that the first mode is the first mode corresponding to NES mode and / or the second mode is the second mode corresponding to NES mode, the fifth information can be an NES mode indicator. The second field included in the NES mode indicator can be configured as a second identifier. The second identifier can be used to indicate that the third mode is the third mode corresponding to NES mode.

[0550] The first access network device can obtain the first information in the following way.

[0551] In one implementation, the first access network device can receive third information corresponding to at least one third access network device. First information is determined based on the second information, the fourth information, and the third information corresponding to each of the at least one third access network device. The fourth information may include at least two of the following: a trigger condition corresponding to the first method, a trigger condition corresponding to the second method, or a trigger condition corresponding to the third method.

[0552] The third information can be used to indicate at least one of the following: first configuration information, second configuration information, or third configuration information. The first configuration information can be the configuration information corresponding to the first method. The second configuration information can be the configuration information corresponding to the second method. The third configuration information can be the configuration information corresponding to the third method. The third access network device can be the access network device corresponding to the second cell.

[0553] As one implementation method, the first information can be carried in an RRC reconfiguration message.

[0554] It should be noted that the explanations for the first information, the second information, the third information, the fourth information, the fifth information, the sixth information, the first method, the second method, the third method, the first situation, the second situation, the first result, the second result, and the third result can be found in the corresponding sections above, and will not be repeated here.

[0555] Figure 13A flowchart illustrating another information processing method provided in this application embodiment. This method can be applied to terminal devices.

[0556] like Figure 13 As shown, the method includes S1310.

[0557] In S1310, in the event of radio link failure and / or cell handover failure, sixth information is recorded.

[0558] According to embodiments of this application, the sixth information may include at least one of the following: the seventh information, the eighth information, the ninth information, the tenth information, or the eleventh information.

[0559] The seventh piece of information can be used to indicate information related to the measurement results. The eighth piece of information can be used to indicate information related to the cell. The ninth piece of information can be used to indicate time-related information. The tenth piece of information can be used to indicate information related to the measurement event. The eleventh piece of information can be used to indicate information related to TA (Translation and Transaction).

[0560] As one implementation method, the terminal device can send the sixth information to the second access network device.

[0561] The second access network device can be the access network device corresponding to the third cell or the access network device corresponding to the fourth cell. The third cell can be the cell where the handover failed. The fourth cell can be different from the third cell.

[0562] The method for a terminal device to send the sixth information to a second access network device can be as follows.

[0563] As one implementation, a first request is received from the second access network device. In response to the first request, a sixth message is sent to the second access network device.

[0564] It should be noted that explanations of the sixth, first, seventh, eighth, ninth, tenth, and eleventh messages can be found in the corresponding sections above, and will not be repeated here.

[0565] Figure 14 A flowchart illustrating another information processing method provided in an embodiment of this application. This method can be applied to a second access network device.

[0566] like Figure 14 As shown, the method includes S1410.

[0567] In S1410, the sixth message is received from the terminal device.

[0568] According to embodiments of this application, the sixth information may be obtained by the terminal device in the event of a wireless link failure and / or cell handover failure.

[0569] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0570] It should be noted that explanations of the sixth, seventh, eighth, ninth, tenth, and eleventh pieces of information can be found in the corresponding sections above, and will not be repeated here.

[0571] This application also provides another information processing method that can be applied to terminal devices.

[0572] The terminal device may send sixth information to the second access network device. The sixth information may be received by the terminal device in the event of radio link failure and / or cell handover failure. The sixth information may include at least one of the following: seventh information, eighth information, ninth information, tenth information, or 10th information. The second access network device may be the access network device corresponding to the third cell or the access network device corresponding to the fourth cell. The third cell may be the cell where the handover failed. The fourth cell may be different from the third cell.

[0573] The method for a terminal device to send the sixth information to a second access network device can be as follows.

[0574] In one implementation, the terminal device receives a first request from the second access network device. In response to the first request, it sends sixth information to the second access network device.

[0575] It should also be noted that in this embodiment, the cell can also be an access network device. For example, the first cell can be a first access network device. The second cell can be a third access network device. The target second cell can be a target third access network device. The third or fourth cell can be a second access network device. The access network device may include a base station.

[0576] The cell handover method of the present application embodiments has been described above. The cell handover apparatus for performing the above method provided in the present application embodiments is described below. Those skilled in the art will understand that the methods and apparatus can be combined and referenced with each other, and the related apparatus provided in the present application embodiments can perform the steps in the above communication method.

[0577] Based on the same concept as the aforementioned embodiments of the cell handover method applied to terminal devices, this application also provides a cell handover device 1500, which can be deployed on a terminal device to implement the cell handover method for terminal devices provided in this application. The cell handover device 1500 includes units or modules for implementing the various steps of the cell handover method.

[0578] Figure 15 This is a structural block diagram of a cell handover device provided in an embodiment of this application.

[0579] like Figure 15 As shown, the cell handover device 1500 may include a first receiving module 1510 and a handover module 1520.

[0580] The first receiving module 1510 is used to receive first information from the first access network device.

[0581] The first information can be used to indicate that, in the event that at least two of the first, second, or third modes coexist, cell handover shall be performed based on the second information. The second information can be used to indicate information related to the handover priority of the first, second, and third modes.

[0582] The first approach can be a CLTM triggered by a first event. The second approach can be a CLTM triggered by a second event. The third approach can be a conditional toggle CHO. The first event can be a layer 1 measurement event. The second event can be a layer 3 measurement event.

[0583] The handover module 1520 is used to perform cell handover based on the first information.

[0584] Based on the same concept as the aforementioned cell handover method applied to a first access network device, this application also provides a cell handover apparatus 1600, which can be deployed on the first access network device to implement the cell handover method applied to the first access network device provided in this application. The cell handover apparatus 1600 includes units or modules for implementing the various steps of the cell handover method.

[0585] Figure 16 This is a structural block diagram of another cell handover device provided in an embodiment of this application.

[0586] like Figure 16 As shown, the cell handover device 1600 may include a transmitting module 1610.

[0587] The sending module 1610 is used to send the first information to the terminal device.

[0588] The first information can be used by the terminal device to perform cell handover based on the first information. The first information can also be used to indicate that, in the case of at least two of the first, second, or third modes coexisting, cell handover should be performed based on the second information.

[0589] The second information can be used to indicate information related to the handover priority of the first, second, and third methods. The first method can be a CLTM triggered by a first event. The second method can be a CLTM triggered by a second event. The third method can be a conditional handover CHO. The first event can be a Layer 1 measurement event. The second event can be a Layer 3 measurement event.

[0590] Based on the same concept as the aforementioned embodiments of the information processing method applied to terminal devices, this application also provides an information processing apparatus 1700, which can be deployed on a terminal device to implement the information processing method for terminal devices provided in this application. The information processing apparatus 1700 includes units or modules for implementing the various steps of the information processing method.

[0591] Figure 17 This is a structural block diagram of an information processing device provided in an embodiment of this application.

[0592] like Figure 17 As shown, the information processing device 1700 may include a recording module 1710.

[0593] The recording module 1710 is used to record sixth information in the event of radio link failure and / or cell handover failure.

[0594] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0595] Based on the same concept as the aforementioned information processing method for a second access network device, this application also provides an information processing apparatus 1800, which can be deployed on a second access network device to implement the information processing method for a second access network device provided in this application. The information processing apparatus 1800 includes units or modules for implementing the various steps of the information processing method.

[0596] Figure 18 This is a structural block diagram of another information processing device provided in an embodiment of this application.

[0597] like Figure 18 As shown, the information processing 1800 may include a second receiving module 1810.

[0598] The second receiving module 1810 is used to receive the sixth information from the terminal device.

[0599] The sixth piece of information can be obtained by the terminal device in the event of a wireless link failure and / or cell handover failure.

[0600] The sixth piece of information may include at least one of the following: the seventh, eighth, ninth, tenth, or eleventh piece of information. The seventh piece of information may be used to indicate information related to the measurement result. The eighth piece of information may be used to indicate information related to the cell. The ninth piece of information may be used to indicate time-related information. The tenth piece of information may be used to indicate information related to the measurement event. The eleventh piece of information may be used to indicate information related to the TA (Transmission Action).

[0601] It is understood that the module division in the above-described device is merely a logical functional division. Each function can correspond to a functional module, or two or more functions can be integrated into one functional module. In actual implementation, all or some modules can be integrated into a single physical entity, or they can be distributed across different physical entities. Furthermore, the aforementioned functional modules can be implemented in hardware, software, or a combination of both. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0602] Figure 19 This is a structural block diagram of the communication device provided in the embodiments of this application.

[0603] like Figure 19 As shown, the communication device 1900 may include one or more processors 1910. The processor 1910 may be a general-purpose processor or a special-purpose processor, etc.

[0604] Optionally, if the communication device 1900 can be a terminal device, a first access network device, or a second access network device, one or more processors 1910 may include a baseband processor, also known as a modem processor.

[0605] Optionally, when the communication device 1900 can be a terminal device, a first access network device, or a second access network device, the communication device 1900 may include a radio frequency (RF) processing system and at least one antenna. In the downlink or sidelink direction, the RF processing system receives RF signals through the antenna and transmits the RF-processed signals to one or more processors 1910 for further processing. In the uplink or sidelink direction, the processor 1910 may transmit terminal-side information processed by one or more processors 1910 to the RF processing system. The RF processing system transmits the RF-processed signals through the antenna.

[0606] In one example, the radio frequency (RF) processing system serves as a communication interface for external communication of a terminal device, a first access network device, or a second access network device. It may include an RF front end (RFFE) and an RF transceiver (RFT). The RFFE can be used to perform at least several processing operations, such as shaping, passband selection, or gain, on RF signals received by the antenna or RF signals to be transmitted through the antenna. The RFFE may include at least one of the following components: an RF switch, a duplexer, a filter, a power amplifier, an antenna tuner, or a low-noise amplifier. The RFFE can be a circuit system composed of multiple discrete devices or integrated into one or more chips. The RF transceiver is used to process the RF signals received by the RFFE into baseband / IF signals for further processing by one or more processors 1910, and to process a baseband / IF signal provided by one or more processors 1910 into an RF signal for transmission to the RFFE. The baseband / IF signals transmitted between the RF transceiver and one or more processors 1910 can be digital or analog signals. Radio frequency transceivers can be implemented by one or more chips, which are usually referred to as radio frequency integrated circuits (RFICs).

[0607] Optionally, the RF transceiver and RF front-end can be packaged in a single chip. In one example, the RF transceiver, RF front-end, and baseband processor can also be packaged in a single chip.

[0608] Optionally, if the communication device 1900 is a terminal device, it may further include at least one of a voice system, a multimedia system, or an interface circuit. The voice system can be used to process audio signals. The multimedia system can be used to handle multimedia-related operations, such as video encoding / decoding or image processing. The interface circuit can be used to enable communication with other terminal components. For example, other terminal components may include at least one of a display, an input device, or a memory.

[0609] Optionally, if the communication device 1900 can be a terminal device, one or more processors 1910 may include an application processor for processing the terminal operating system and application layer.

[0610] Optionally, the baseband processor may include one or more processor cores and interface circuitry. The one or more processor cores may be used to process signals and execute one or more communication protocols. Optionally, the baseband processor may also include memory. The memory may be used to store at least a portion of the corresponding computer program instructions and / or data. In one example, one or more processor cores implement the relevant steps in the above method embodiments by executing the computer program instructions stored in the memory. In this application embodiment, the memory may be used to store the corresponding computer program instructions and / or data. This can mean that the memory is used to store all the corresponding computer program instructions and / or data for the processor core to execute, or it can mean that the memory is used to store a portion of the corresponding computer program instructions and / or data. This portion of the corresponding computer program instructions and / or data may include the computer program instructions and / or data that the processor core currently needs to execute. The memory can store different portions of computer program instructions and / or data multiple times for the processor core to execute in order to implement the relevant steps in the above method embodiments. The interface circuit serves as a communication interface for communication with other components, such as transmitting signals with the RF processing system, communicating with the application processor, voice system, and / or multimedia system via a bus, and / or communicating with related components of the voice system and / or multimedia system via a bus, for example, transmitting data control signals with the application processor. Optionally, to reduce the load on the processor core, the baseband processor may also include baseband signal processing circuitry to perform at least some baseband signal processing tasks, such as demodulation, modulation, encoding, or decoding. Optionally, one or more processors 1910, the voice system, the multimedia system, and the interface circuitry can be packaged into a single processor chip. For example, a SoC (system on clip) chip or a SIP (system in package) chip. In one example, the above can also be packaged into multiple chips. For example, the baseband processor can be packaged as a single chip, or packaged with some or all of the circuitry of the RF processing system into a single chip.

[0611] Optionally, the memory can be on-chip memory, for example, located on the processor chip.

[0612] Optionally, the memory can be off-chip memory, for example, located outside the processor chip.

[0613] Optionally, in one example, processor 1910 may include a computer program (also referred to as code or instructions) that can be executed on processor 1910, causing communication device 1900 to perform the methods performed by the terminal device, the first access network device, or the second access network device in the above method embodiments. In yet another possible design, communication device 1900 includes circuitry (…). Figure 19 (Not shown), this circuit is used to implement the functions of the terminal device, the first access network device, or the second access network device in the above method embodiments.

[0614] Optionally, the communication device 1900 may include one or more memories 1920 storing computer programs (sometimes referred to as code or instructions) that can be run on the processor 1910, causing the communication device 1900 to perform the methods performed by the terminal device, the first access network device, or the second access network device in the above embodiments.

[0615] Optionally, the processor 1910 and / or memory 1920 may also store data. The processor 1910 and memory 1920 may be configured separately or integrated together. Optionally, the communication device 1900 may also include a communication interface 1930. The processor 1910, sometimes referred to as a processing unit, controls the communication device 1900 (e.g., a terminal device, a first access network device, or a second access network device). The communication interface 1930, sometimes referred to as a transceiver unit, transceiver, transceiver circuit, transceiver, or input / output interface, is used to implement the transmission and reception functions of the communication device 1900.

[0616] Optionally, the processor 1910 and the communication interface 1930 are coupled to each other.

[0617] It is understood that when the communication device 1900 is a terminal device or a first access network device, the communication interface 1930 can be a transceiver, specifically including a transmitter and a receiver, with the transmitter used to send signals and the receiver used to receive signals.

[0618] The above-described method embodiments can be applied to a processor, or implemented by a processor. A processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed through integrated logic circuits in the processor's hardware or through software instructions.

[0619] The aforementioned processors, application processors, baseband processors, processor circuits, or processor cores can be collectively referred to as processors. These processors may include central processing units (CPUs), microprocessor units (MPUs), microcontroller units (MCUs), graphics processing units (GPUs), artificial intelligence processors (AIPs), neural processing units (NPUs), 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, or any combination thereof.

[0620] The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in mature storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0621] The memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), phase-change memory (PCM), resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), hard disk drive (HDD), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DRRAM). Furthermore, volatile memory may also include registers and / or caches. It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0622] In one example, the computer program instructions for performing the above embodiments may be stored in non-volatile memory, such as at least a portion of memory 1920 (e.g., at least one of ROM, flash memory, EPROM, or hard disk). When communication device 1900 is running, the corresponding computer program instructions may be partially or entirely loaded into memory with a faster transfer speed than processor 1910 (e.g., at least one of RAM, SRAM, DRAM, PCM, ReRAM, MRAM, FRAM, cache, or registers) for processor execution to implement the steps in the above method embodiments.

[0623] Figure 20 This is a structural block diagram of the terminal device provided in an embodiment of this application.

[0624] like Figure 20 As shown, the terminal device 2000 may include a processor 2010, an external memory interface 2020, an internal memory 2021, a display screen 2030, a camera 2040, an antenna 1, an antenna 2, a mobile communication module 2050, and a wireless communication module 2060, etc.

[0625] It is understood that the structure illustrated in the embodiments of this application does not constitute a specific limitation on the terminal device 2000. In other embodiments of this application, the terminal device 2000 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0626] Figure 21 This is a schematic diagram of the structure of the access network device provided in an embodiment of this application.

[0627] For example, it could be a structural diagram of a base station / CU. This base station 2100 can be applied to, for example... Figure 3 In the system shown, the functions of the first access network device or the second access network device in the above method embodiments are performed.

[0628] like Figure 21As shown, the base station 2100 may include one or more radio frequency (RF) units 2140. For example, a remote radio frequency (RRU) 2120 and one or more baseband units (BBUs, also known as distributed units (DUs)) 2110. The RRU 2120 may be referred to as a transceiver unit. Optionally, the transceiver unit 2120 may also be referred to as a transceiver, transceiver circuit, or transceiver, etc., and may include at least one antenna 2130 and the RF unit 2140. Optionally, the transceiver unit 2120 may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (or receiver circuit), and the transmitting unit may correspond to a transmitter (or transmitter circuit). The RRU 2120 is mainly used for transmitting and receiving RF signals and converting RF signals to baseband signals, for example, for sending indication information to terminal equipment. The BBU 2110 is mainly used for baseband processing and controlling the base station. The RRU 2120 and BBU 2110 may be physically installed together or physically separated, i.e., a distributed base station.

[0629] The BBU 2110 is the control center of the base station, also known as the processing unit, and can communicate with... Figure 19 The processor 1910 in the diagram is primarily used to perform baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU (processing unit) can be used to control the base station to execute the operation procedures for the first or second access network device described in the above method embodiments.

[0630] In one example, the BBU 2110 can be composed of one or more boards. These boards can collectively support a single access standard wireless access network (e.g., LTE), or they can each support different access standards wireless access networks (e.g., LTE, 5G, or other networks). The BBU 2110 also includes a memory 2150 and a processor 2160. The memory 2150 stores necessary instructions and data. The processor 2160 controls the base station to perform necessary actions, such as controlling the base station to execute the operation procedures related to the first or second access network device in the above method embodiments. The memory 2150 and processor 2160 can serve one or more boards. That is, each board can have its own memory and processor, or multiple boards can share the same memory and processor. Furthermore, each board can also have necessary circuitry.

[0631] It should be understood that Figure 21 The base station 2100 shown can achieve Figures 3-9 , Figures 11-12 The various processes involving the first access network device in the method embodiment shown can also be implemented. Figure 10 , Figures 13-14The methods illustrated in the embodiments involve various processes related to the second access network device. The operations and / or functions of each module in the base station 2100 are respectively for implementing the corresponding processes in the above method embodiments. For details, please refer to the descriptions in the above method embodiments; to avoid repetition, detailed descriptions are appropriately omitted here.

[0632] The BBU 2110 described above can be used to perform the actions implemented internally by the first access network device or the second access network device as described in the preceding method embodiments, while the RRU 2120 can be used to perform the actions sent by the first access network device to the terminal device or received from the terminal device, or the actions sent by the second access network device to the terminal device or received from the terminal device, as described in the preceding method embodiments. Please refer to the descriptions in the preceding method embodiments for details, which will not be repeated here.

[0633] It should be understood that Figure 21 The base station 2100 shown is only one possible architecture for the first access network device or the second access network device, and should not be construed as limiting this application in any way. The method provided in this application can be applied to network devices with other architectures, such as network devices including CU, DU, and active antenna elements. The embodiments of this application do not limit the specific architecture of the first access network device or the second access network device.

[0634] This application also provides a chip system, which includes at least one processor for supporting the implementation of the functions of the terminal device, the first access network device, or the second access network device involved in any of the above method embodiments.

[0635] In one possible design, the chip system also includes a memory for storing computer program instructions and data, which may be located inside or outside the processor.

[0636] The chip system can consist of chips or include chips and other discrete components.

[0637] This application also provides a computer program product, which includes a computer program (also referred to as code or instructions). When the computer program is run, the method executed by the terminal device, the method executed by the first access network device, or the method executed by the second access network device in this application embodiment is executed.

[0638] This application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is executed, the method executed by the terminal device, the method executed by the first access network device, or the method executed by the second access network device in this application embodiment is executed.

[0639] The methods described in the above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. If implemented in software, the functionality can be stored as one or more instructions or code on or transmitted on a computer-readable storage medium. The computer-readable storage medium can include computer storage media and communication media, and can also include any medium capable of transferring a computer program from one place to another. The storage medium can be any target medium accessible by a computer.

[0640] In one possible implementation, a computer-readable medium may include RAM, ROM, CD-ROM, other optical disc storage, disk storage, or other magnetic storage devices, or any other medium targeted to carry or storing the required program code in the form of instructions or data structures, and accessible by a computer. Furthermore, any connection is appropriately referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology such as infrared, radio, or microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology such as infrared, radio, or microwave is included in the definition of medium. As used herein, disks and optical discs include optical discs, laser discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while optical discs optically reproduce data using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0641] This application also provides a communication system, which may include the aforementioned cell handover device 1500 and cell handover device 1600. Alternatively, the communication system may include the aforementioned information processing device 1700 and information processing device 1800.

[0642] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor, or other programmable device to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0643] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A cell handover method, characterized in that, include: Receive first information from a first access network device, wherein the first information is used to indicate that, in the case of at least two of the first mode, the second mode, or the third mode coexisting, cell handover shall be performed according to second information, the second information is used to indicate information related to the handover priority of the first mode, the second mode, and the third mode, the first mode being Conditional Low-Layer Mobility CLTM triggered by a first event, the second mode being CLTM triggered by a second event, the third mode being Conditional Handover Choreography (CHO), the first event being a Layer 1 measurement event, and the second event being a Layer 3 measurement event; Cell handover is performed based on the first information.

2. The method according to claim 1, characterized in that, The second information is used to indicate: In the first case, the handover priority corresponding to the second method is the highest, or if the cell handover fails N times using the second method, the cell handover is performed using the first method. The first case indicates that there is at least one first result, at least one second result, and no third result. The first result is the trigger condition for satisfying the first method, the second result is the trigger condition for satisfying the second method, and the third result is the trigger condition for satisfying the third method. N is an integer greater than or equal to 1; and / or In the second case, the handover priority corresponding to the third method is the highest, or if the cell handover fails N times using the third method, the cell handover is performed using other methods. The second case is used to indicate that there is at least one of the third results and at least one of the following: there is at least one first result or there is at least one second result. If there is at least one first result, the other method is the first method. If there is at least one second result, the other method is the second method. If there is at least one first result and at least one second result, the other method is either the first method or the second method.

3. The method according to claim 2, characterized in that, The first information includes the second information, the fourth information, and the third information corresponding to at least one second cell, wherein the second cell is a candidate cell, and the third information includes at least one of the following: first configuration information, second configuration information, or third configuration information, wherein the first configuration information is configuration information corresponding to the first method, the second configuration information is configuration information corresponding to the second method, and the third configuration information is configuration information corresponding to the third method, and the fourth information includes at least two of the following: triggering conditions corresponding to the first method, triggering conditions corresponding to the second method, or triggering conditions corresponding to the third method; The step of performing cell handover based on the first information includes: Based on the fourth information and the third information corresponding to each of the at least one second cell, at least one fourth result corresponding to each of the at least one second cell is determined. The fourth result corresponding to the second cell is used to indicate whether the fifth result corresponding to the handover mode satisfies the trigger condition corresponding to the handover mode. The handover mode is a handover mode supported by the second cell, and the handover mode includes at least one of the following: the first mode, the second mode, or the third mode. The fifth result is obtained by measuring the first signal quality and / or the second signal quality based on the third information corresponding to the second cell. The first signal quality is the signal quality of the first measurement object, and the second signal quality is the signal quality of the second measurement object. The second measurement object includes the second cell or the first beam, the first beam is the beam of the second cell, the second beam is the beam of the first cell, the first cell is the original cell, the first result is the fourth result under the condition of satisfying the first condition, the first condition is the fifth result corresponding to the first method satisfying the trigger condition corresponding to the first method, the second result is the fourth result under the condition of satisfying the second condition, the second condition is the fifth result corresponding to the second method satisfying the trigger condition corresponding to the second method, the third result is the fourth result under the condition of satisfying the third condition, the third condition is the fifth result corresponding to the third method satisfying the trigger condition corresponding to the third method; Based on the second information and at least one fourth result corresponding to each of the at least one second cell, a target second cell is determined from the at least one second cell; Switch from the first cell to the target second cell.

4. The method according to claim 3, characterized in that, The step of determining the target second cell from the at least one second cell based on the second information and at least one fourth result corresponding to each of the at least one second cell includes: If at least one fourth result corresponding to each of the at least one second cell satisfies the first condition, the target second cell is determined from the second cells corresponding to each of the at least one second result according to the second information; or if the handover from the first cell to the target second cell fails N times, the target second cell is determined from the second cells corresponding to each of the at least one first result according to the second information. If at least one fourth result corresponding to each of the at least one second cell satisfies the second condition, the target second cell is determined from the second cells corresponding to each of the at least one third result according to the second information; or if the handover of the target second cell from the first cell fails N times, the target second cell is determined from the second cells corresponding to each of the at least one first result and / or the second cells corresponding to each of the at least one second result according to the second information.

5. The method according to claim 3 or 4, characterized in that, When the first measurement object is the second cell and the second measurement object is the first cell, the triggering condition corresponding to the second method includes at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than the first threshold, or the second signal quality is less than the second threshold and the first signal quality is greater than the third threshold, wherein the third threshold is greater than the second threshold. and / or When the first measurement object is the first beam and the second measurement object is the second beam, the triggering condition corresponding to the first method includes at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than the fourth threshold, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold, wherein the seventh threshold is greater than the sixth threshold.

6. The method according to any one of claims 1-5, characterized in that, The first method is the first method corresponding to the Network Energy Saving (NES) mode; and / or The second method is the second method corresponding to the NES mode; and / or The third method is the third method corresponding to the NES mode.

7. The method according to claim 6, characterized in that, Also includes: Receive fifth information from the first access network device, wherein the fifth information includes at least one of the following: the first mode is a first mode corresponding to the NES mode, the second mode is a second mode corresponding to the NES mode, or the third mode is a third mode corresponding to the NES mode; The step of determining at least one fourth result corresponding to each of the at least one second cell based on the fourth information and the third information corresponding to each of the at least one second cell includes: Based on the fifth information, the fourth information, and the third information corresponding to each of the at least one second cell, at least one fourth result corresponding to each of the at least one second cell is determined.

8. The method according to claim 6 or 7, characterized in that, The fifth information is carried in the downlink control information (DCI). The first field of the DCI is configured as a first identifier. The first identifier is used to indicate at least one of the following: triggering the first mode corresponding to the NES mode, the second mode corresponding to the NES mode, or the third mode corresponding to the NES mode. or When the fifth information is used to indicate that the first mode is the first mode corresponding to the NES mode and / or the second mode is the second mode corresponding to the NES mode, the fifth information is an NES mode indication, and the second field included in the NES mode indication is configured as a second identifier, which is used to indicate that the third mode is the third mode corresponding to the NES mode.

9. The method according to any one of claims 1-8, characterized in that, Also includes: In the event of radio link failure and / or cell handover failure, a sixth piece of information is recorded, wherein the sixth piece of information includes at least one of the following: a seventh piece of information, an eighth piece of information, a ninth piece of information, a tenth piece of information, or an eleventh piece of information, wherein the seventh piece of information is used to indicate information related to the measurement result, the eighth piece of information is used to indicate information related to the cell, the ninth piece of information is used to indicate information related to the time, the tenth piece of information is used to indicate information related to the measurement event, and the eleventh piece of information is used to indicate information related to the timing advance (TA).

10. The method according to claim 9, characterized in that, The seventh information includes at least one of the following: measurement results corresponding to the first cell, measurement results corresponding to a neighboring cell, measurement results or beam measurement results corresponding to the second cell, wherein the neighboring cell is a cell adjacent to the first cell, the first cell is the original cell, and the second cell is a candidate cell; and / or The eighth information includes at least one of the following: a third identifier, a fourth identifier, indication information as to whether the second cell is a cell supporting the first method and / or the second method, indication information as to whether the second cell is a cell supporting CLTM, indication information as to whether the neighboring cell is a cell supporting the first method and / or the second method, indication information as to whether the neighboring cell is a cell supporting CLTM, whether the neighboring cell is configured with pre-configured authorized CG resources, the last handover type, information of the second cell that meets the triggering conditions, information of the second cell that meets the triggering conditions corresponding to the first method or information of the second cell that meets the triggering conditions corresponding to the second method, wherein the third identifier is used to indicate the cell where the handover failed, the fourth identifier is used to indicate the cell that reconnected, and the last handover type includes CLTM, the first method, or the second method; and / or The ninth information includes at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration; wherein the first duration is the duration between a first moment and a second moment; the first moment is the earliest moment at which the triggering condition is satisfied; the second moment is the moment of cell handover failure or radio link failure; the second duration is the duration between a third moment and a fourth moment; the third moment is the moment at which the first triggering condition corresponding to the first method is satisfied; the fourth moment is the moment at which the first triggering condition corresponding to the second method is satisfied; the third duration is the duration between the fourth moment and the third moment; the fourth duration is the duration between the third moment and the fifth moment; the fifth moment is the moment at which the second triggering condition corresponding to the first method is satisfied; the fifth duration is the duration between the fourth moment and the sixth moment; and / or The tenth information includes at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, the number of Layer 1 measurement events that satisfy the Layer 3 measurement event, the event type including at least one of the following: the Layer 1 measurement event or the Layer 3 measurement event, the event including an indication of at least one of the following: event A3, event A4, event A5, event A3 corresponding to the LTM or event A5 corresponding to the LTM; and / or The eleventh information includes at least one of the following: an indication of whether the TA of the neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration, wherein the sixth duration is the remaining duration of the TA of the neighboring cell or the remaining duration of the TA of the candidate cell, and the seventh duration is the remaining duration of the TA of the cell that failed the handover.

11. The method according to claim 9 or 10, characterized in that, Also includes: The sixth information is sent to the second access network device, wherein the second access network device includes an access network device corresponding to the third cell or an access network device corresponding to the fourth cell, the third cell is a cell that failed to handover, and the fourth cell is different from the third cell.

12. The method according to claim 11, characterized in that, Sending the sixth information to the second access network device includes: Receive a first request from the second access network device; In response to the first request, the sixth information is sent to the second access network device.

13. A cell handover method, characterized in that, include: Sending first information to a terminal device, wherein the first information is used by the terminal device to perform cell handover according to the first information, the first information is used to indicate that, in the case of at least two of the first mode, the second mode, or the third mode coexisting, cell handover is performed according to second information, the second information is used to indicate information related to the handover priority of the first mode, the second mode, and the third mode, the first mode being Conditional Low-Layer Mobility Transaction (CLTM) triggered by a first event, the second mode being CLTM triggered by a second event, the third mode being Conditional Handover (CHO), the first event being a Layer 1 measurement event, and the second event being a Layer 3 measurement event.

14. The method according to claim 13, characterized in that, The second information is used to indicate: In the first case, the handover priority corresponding to the second method is the highest, or if the cell handover fails N times using the second method, the cell handover is performed using the first method. The first case indicates that there is at least one first result, at least one second result, and no third result. The first result is the trigger condition for satisfying the first method, the second result is the trigger condition for satisfying the second method, and the third result is the trigger condition for satisfying the third method. N is an integer greater than or equal to 1; and / or In the second case, the handover priority corresponding to the third method is the highest, or if the cell handover fails N times using the third method, the cell handover is performed using other methods. The second case is used to indicate that there is at least one third result and at least one of the following: there is at least one first result or there is at least one second result. If there is at least one first result, the other method is the first method. If there is at least one second result, the other method is the second method. If there is at least one first result and at least one second result, the other method is either the first method or the second method.

15. The method according to claim 13 or 14, characterized in that, The triggering conditions corresponding to the second method include at least one of the following: the first signal quality is better than the second signal quality, the first signal quality is greater than the first threshold, or the second signal quality is less than the second threshold and the first signal quality is greater than the third threshold, wherein the first signal quality is the signal quality of the second cell, the second signal quality is the signal quality of the first cell, and the third threshold is greater than the second threshold; and / or The triggering conditions corresponding to the first method include at least one of the following: the first signal quality is better than the second signal quality, the second signal quality is less than the fourth threshold, the first signal quality is greater than the fifth threshold, or the second signal quality is less than the sixth threshold and the first signal quality is greater than the seventh threshold, wherein the first signal quality is the signal quality of the first beam, the first beam is the beam of the second cell, the second signal quality is the signal quality of the second beam, the second beam is the beam of the first cell, and the seventh threshold is greater than the sixth threshold.

16. The method according to any one of claims 13-15, characterized in that, The first method is the first method corresponding to the Network Energy Saving (NES) mode; and / or The second method is the second method corresponding to the NES mode; and / or The third method is the third method corresponding to the NES mode.

17. The method according to claim 16, characterized in that, Also includes: Send a fifth message to the terminal device, wherein the fifth message includes at least one of the following: the first mode is a first mode corresponding to the NES mode, the second mode is a second mode corresponding to the NES mode, or the third mode is a third mode corresponding to the NES mode.

18. The method according to claim 16 or 17, characterized in that, The fifth information is carried in the downlink control information (DCI). The first field of the DCI is configured as a first identifier. The first identifier is used to indicate at least one of the following: triggering the first mode corresponding to the NES mode, the second mode corresponding to the NES mode, or the third mode corresponding to the NES mode. or When the fifth information is used to indicate that the first mode is the first mode corresponding to the NES mode and / or the second mode is the second mode corresponding to the NES mode, the fifth information is an NES mode indication, and the second field included in the NES mode indication is configured as a second identifier, which is used to indicate that the third mode is the third mode corresponding to the NES mode.

19. The method according to any one of claims 13-18, characterized in that, Also includes: Receive third information from at least one third access network device, wherein the third information includes at least one of the following: first configuration information, second configuration information, or third configuration information, wherein the first configuration information is configuration information corresponding to a first mode, the second configuration information is configuration information corresponding to a second mode, the third configuration information is configuration information corresponding to the third mode, and the third access network device is an access network device corresponding to a second cell; The first information is determined based on the second information, the fourth information, and the third information corresponding to each of the at least one third access network device, wherein the fourth information includes at least two of the following: a trigger condition corresponding to the first method, a trigger condition corresponding to the second method, or a trigger condition corresponding to the third method.

20. An information processing method, characterized in that, include: In the event of radio link failure and / or cell handover failure, a sixth piece of information is recorded, wherein the sixth piece of information includes at least one of the following: a seventh piece of information, an eighth piece of information, a ninth piece of information, a tenth piece of information, or an eleventh piece of information, wherein the seventh piece of information is used to indicate information related to the measurement result, the eighth piece of information is used to indicate information related to the cell, the ninth piece of information is used to indicate information related to the time, the tenth piece of information is used to indicate information related to the measurement event, and the eleventh piece of information is used to indicate information related to the timing advance (TA).

21. The method according to claim 20, characterized in that, The seventh information includes at least one of the following: measurement results corresponding to the original cell, measurement results corresponding to the neighboring cell, measurement results or beam measurement results corresponding to the candidate cell, wherein the neighboring cell is the adjacent cell of the original cell, and the candidate cell is the candidate cell configured in the original cell; and / or The eighth information includes at least one of the following: a third identifier, a fourth identifier, indication information as to whether the candidate cell supports the first mode and / or the second mode, indication information as to whether the candidate cell supports CLTM, indication information as to whether the neighboring cell supports the first mode and / or the second mode, indication information as to whether the neighboring cell supports CLTM, whether the neighboring cell is configured with pre-configured authorized CG resources, the last handover type, information of candidate cells that meet the triggering conditions, information of candidate cells that meet the triggering conditions corresponding to the first mode or information of candidate cells that meet the triggering conditions corresponding to the second mode, wherein the third identifier is used to indicate a cell where the handover failed, the fourth identifier is used to indicate a cell that reconnected, and the last handover type includes CLTM, the first mode, or the second mode; and / or The ninth information includes at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration; wherein the first duration is the duration between a first moment and a second moment; the first moment is the earliest moment at which the triggering condition is satisfied; the second moment is the moment of cell handover failure or radio link failure; the second duration is the duration between a third moment and a fourth moment; the third moment is the moment at which the first triggering condition corresponding to the first method is satisfied; the fourth moment is the moment at which the first triggering condition corresponding to the second method is satisfied; the third duration is the duration between the fourth moment and the third moment; the fourth duration is the duration between the third moment and the fifth moment; the fifth moment is the moment at which the second triggering condition corresponding to the first method is satisfied; the fifth duration is the duration between the fourth moment and the sixth moment; and / or The tenth information includes at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, the number of Layer 1 measurement events or the number of Layer 3 measurement events, wherein the event type includes at least one of the following: the Layer 1 measurement event or the Layer 3 measurement event, and the event includes an indication of at least one of the following: event A3, event A4, event A5, event A3 corresponding to the LTM or event A5 corresponding to the LTM; and / or The eleventh information includes at least one of the following: an indication of whether the TA of the neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration, wherein the sixth duration is the remaining duration of the TA of the neighboring cell or the remaining duration of the TA of the candidate cell, and the seventh duration is the remaining duration of the TA of the cell that failed the handover.

22. The method according to claim 20 or 21, characterized in that, Also includes: The sixth information is sent to the second access network device, wherein the second access network device includes an access network device corresponding to the third cell or an access network device corresponding to the fourth cell, the third cell is a cell that failed to handover, and the fourth cell is different from the third cell.

23. The method according to claim 22, characterized in that, Sending the sixth information to the second access network device includes: Receive a first request from the second access network device; In response to the first request, the sixth information is sent to the second access network device.

24. An information processing method, characterized in that, include: The terminal device receives a sixth piece of information, wherein the sixth piece of information is obtained by the terminal device in the event of a radio link failure and / or cell handover failure, and the sixth piece of information includes at least one of the following: a seventh piece of information, an eighth piece of information, a ninth piece of information, a tenth piece of information, or an eleventh piece of information, wherein the seventh piece of information is used to indicate information related to the measurement result, the eighth piece of information is used to indicate information related to the cell, the ninth piece of information is used to indicate information related to the time, the tenth piece of information is used to indicate information related to the measurement event, and the eleventh piece of information is used to indicate information related to the timing advance (TA).

25. The method according to claim 24, characterized in that, The seventh information includes at least one of the following: measurement results corresponding to the original cell, measurement results corresponding to neighboring cells, measurement results or beam measurement results corresponding to candidate cells, wherein the neighboring cells are used to indicate the adjacent cells of the original cell, and the candidate cells are the candidate cells configured for the original cell; and / or The eighth information includes at least one of the following: a third identifier, a fourth identifier, indication information as to whether the candidate cell supports the first mode and / or the second mode, indication information as to whether the candidate cell supports CLTM, indication information as to whether the neighboring cell supports the first mode and / or the second mode, indication information as to whether the neighboring cell supports CLTM, whether the neighboring cell is configured with pre-configured authorized CG resources, the last handover type, information of candidate cells that meet the triggering conditions, information of candidate cells that meet the triggering conditions corresponding to the first mode or information of candidate cells that meet the triggering conditions corresponding to the second mode, wherein the third identifier is used to indicate a cell where the handover failed, the fourth identifier is used to indicate a cell that reconnected, and the last handover type includes CLTM, the first mode, or the second mode; and / or The ninth information includes at least one of the following: a first duration, a second duration, a third duration, a fourth duration, or a fifth duration; wherein the first duration is the duration between a first moment and a second moment; the first moment is the earliest moment at which the triggering condition is satisfied; the second moment is the moment of cell handover failure or radio link failure; the second duration is the duration between a third moment and a fourth moment; the third moment is the moment at which the first triggering condition corresponding to the first method is satisfied; the fourth moment is the moment at which the first triggering condition corresponding to the second method is satisfied; the third duration is the duration between the fourth moment and the third moment; the fourth duration is the duration between the third moment and the fifth moment; the fifth moment is the moment at which the second triggering condition corresponding to the first method is satisfied; the fifth duration is the duration between the fourth moment and the sixth moment; and / or The tenth information includes at least one of the following: an event type that satisfies the triggering condition, an event that satisfies the triggering condition, the number of Layer 1 measurement events or the number of Layer 3 measurement events, wherein the event type includes at least one of the following: the Layer 1 measurement event or the Layer 3 measurement event, and the event includes an indication of at least one of the following: event A3, event A4, event A5, event A3 corresponding to the LTM or event A5 corresponding to the LTM; and / or The eleventh information includes at least one of the following: an indication of whether the TA of the neighboring cell is valid, a sixth duration, an indication of whether the TA of the cell that failed the handover is valid, or a seventh duration, wherein the sixth duration is the remaining duration of the TA of the neighboring cell or the remaining duration of the TA of the candidate cell, and the seventh duration is the remaining duration of the TA of the cell that failed the handover.

26. A communication device, characterized in that, include: Processor and memory; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the communication device to perform the method as described in any one of claims 1-12, or the method as described in any one of claims 13-19, or the method as described in any one of claims 20-23, or the method as described in claims 24 or 25.

27. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1-12, or the method as described in any one of claims 13-19, or the method as described in any one of claims 20-23, or the method as described in claim 24 or 25.

28. A chip system, characterized in that, It includes at least one processor and a communication interface, the communication interface and the at least one processor being interconnected via a line, the at least one processor being configured to run a computer program or instructions to perform the method as claimed in any one of claims 1-12, or the method as claimed in any one of claims 13-19, or the method as claimed in any one of claims 20-23, or the method as claimed in claim 24 or 25.

29. A computer program product, characterized in that, Includes a computer program that, when run, causes the communication device to perform the method as described in any one of claims 1-12, or the method as described in any one of claims 13-19, or the method as described in any one of claims 20-23, or the method as described in claim 24 or 25.

30. A communication system, characterized in that, Includes a first cell handover device and a second cell handover device. The first cell handover device is configured to perform the method as described in any one of claims 1-12, and the second cell handover device is configured to perform the method as described in any one of claims 13-19; or The communication system includes a first information processing device and a second information processing device, wherein the first information processing device is used to perform the method as described in any one of claims 20-23, and the second information processing device is used to perform the method as described in claim 24 or 25.

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