Method, terminal device and network device for sending wireless link failure report

Abstract

An embodiment of the present application relates to a method for sending a radio link failure report, comprising: sending a radio link failure (RLF) report related to conditional handover (CHO), comprising at least one of the following: a signal measurement result of a terminal device on a neighboring cell; a signal measurement result of a terminal device on a candidate cell that does not meet the handover execution / triggering condition; a list of candidate cells that meet the handover execution / triggering condition; a list of candidate cells that do not meet the handover execution / triggering condition; an identifier of a first cell, the first cell including a cell in which the terminal device receives radio resource control (RRC) reconfiguration signaling; information indicating whether the terminal device has experienced RLF in the first cell until CHO is executed; the length of time from receiving the CHO configuration to triggering the CHO; and a handover type identifier. The embodiment of the present application can enable the terminal to report an RLF report related to CHO, which helps the network adjust configuration parameters.

Description

[0001] This application is a divisional application of the invention patent application with application number 202080104871.1 filed on September 24, 2020, and invention name: “Method, terminal device and network device for sending wireless link failure report”. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a method for sending a wireless link failure report, a terminal device, and a network device. Background Art

[0003] Unlike traditional handover, conditional handover (CHO) is a cell handover method in which the terminal independently determines the handover time and target. In conditional handover, after receiving the RRC reconfiguration containing the handover configuration, the terminal does not immediately execute the handover. Instead, it evaluates whether the CHO execution conditions are met. If the subsequent evaluation result is satisfied, the terminal reconnects to the target cell. In this case, the terminal does not need to query the source base station for permission to execute the handover.

[0004] If a premature handover occurs in the terminal, such as a handover failure occurs when the terminal accesses the target node or a radio link failure (RLF) occurs on the target node after the handover is successfully completed, the terminal selects the source cell after the cell selection process and initiates the reconstruction process. After the reconstruction is completed, the terminal sends a radio link failure report (RLFreport) to the source node. If the source base station finds that this is a premature handover problem, it can change the threshold setting of the measurement target corresponding to the terminal measurement report event. This process is called Mobility Robust Optimization (MRO). The current version of MRO does not consider the terminal sending the RLF-related content corresponding to the CHO in the event of a CHO failure, nor does it support the network to use the RLF-related content to optimize the configuration of the CHO. Summary of the Invention

[0005] The embodiments of the present application provide a method, terminal device, and network device for sending a radio link failure report, which can enable the terminal to send RLF-related content corresponding to CHO, which helps the network adjust configuration parameters.

[0006] This embodiment of the present application provides a method for sending a radio link failure report, which is applied to a terminal device and includes:

[0007] Sending a (radio link failure) RLF report related to a conditional handover (CHO), where the RLF report related to the CHO includes at least one of the following:

[0008] Signal measurement results of the terminal device on the neighboring cell;

[0009] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0010] A list of candidate cells that meet the handover execution / triggering conditions;

[0011] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0012] an identifier of a first cell, the first cell comprising a cell in which the terminal device receives radio resource control (RRC) reconfiguration signaling;

[0013] Indication information of the handover execution condition type configured for the terminal;

[0014] Parameters corresponding to the configured switching execution conditions;

[0015] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0016] The length of time from receiving the CHO configuration to triggering the CHO;

[0017] Toggle type identification.

[0018] The present application also provides a method for receiving and applying a radio link failure report, which is applied to a network device and includes:

[0019] Receive a CHO-related RLF report from a terminal device, where the CHO-related RLF report includes at least one of the following:

[0020] Signal measurement results of the terminal device on the neighboring cell;

[0021] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0022] A list of candidate cells that meet the handover execution / triggering conditions;

[0023] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0024] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the RRC reconfiguration signaling;

[0025] Indication information of the handover execution condition type configured for the terminal;

[0026] Parameters corresponding to the configured switching execution conditions;

[0027] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0028] The length of time from receiving the CHO configuration to triggering the CHO;

[0029] Toggle type identification.

[0030] The present application also provides a terminal device, including:

[0031] A sending module, configured to send a radio link failure (RLF) report related to a conditional handover (CHO), where the RLF report related to the CHO includes at least one of the following:

[0032] Signal measurement results of the terminal device on the neighboring cell;

[0033] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0034] A list of candidate cells that meet the handover execution / triggering conditions;

[0035] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0036] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the radio resource control RRC reconfiguration signaling;

[0037] Indication information of the handover execution condition type configured for the terminal;

[0038] Parameters corresponding to the configured switching execution conditions;

[0039] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0040] The length of time from receiving the CHO configuration to triggering the CHO;

[0041] Toggle type identification.

[0042] The present application also provides a network device, including:

[0043] A receiving module is configured to receive a CHO-related RLF report from a terminal device, where the CHO-related RLF report includes at least one of the following:

[0044] Signal measurement results of the terminal device on the neighboring cell;

[0045] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0046] A list of candidate cells that meet the handover execution / triggering conditions;

[0047] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0048] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the RRC reconfiguration signaling;

[0049] Indication information of the handover execution condition type configured for the terminal;

[0050] Parameters corresponding to the configured switching execution conditions;

[0051] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0052] The length of time from receiving the CHO configuration to triggering the CHO;

[0053] Toggle type identification.

[0054] An embodiment of the present application also proposes a terminal device, comprising: a processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, and executing any of the above methods for sending a wireless link failure report.

[0055] An embodiment of the present application also proposes a network device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any of the above-mentioned methods for receiving and applying wireless link failure reports.

[0056] An embodiment of the present application further proposes a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes any of the above methods for sending a wireless link failure report.

[0057] An embodiment of the present application further proposes a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes any of the above-mentioned methods for receiving and applying wireless link failure reports.

[0058] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute any of the above methods for sending a wireless link failure report.

[0059] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute any of the above-mentioned methods for receiving and applying a wireless link failure report.

[0060] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute any of the above methods for sending a wireless link failure report.

[0061] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute any of the above-mentioned methods for receiving and applying wireless link failure reports.

[0062] An embodiment of the present application further provides a computer program, which enables a computer to execute any of the above methods for sending a wireless link failure report.

[0063] An embodiment of the present application further provides a computer program, which enables a computer to execute any of the above-mentioned methods for receiving and applying wireless link failure reports.

[0064] The embodiment of the present application enables the terminal to send RLF-related content corresponding to the CHO by sending an RLF report related to the CHO, and the content can be used by the network to optimize the configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0066] Figure 2 This is a flowchart of an implementation of a method 200 for sending a wireless link failure report according to an embodiment of the present application.

[0067] Figure 3 This is a flowchart of an implementation method 300 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0068] Figure 4 This is a flowchart of an implementation method 400 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0069] Figure 5 This is a flowchart of an implementation method 500 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0070] Figure 6 It is a flowchart of an implementation method 600 for receiving and applying a wireless link failure report according to an embodiment of the present application.

[0071] Figure 7 7 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application.

[0072] Figure 8 8 is a schematic diagram of the structure of a network device 800 according to an embodiment of the present application.

[0073] Figure 99 is a schematic diagram of the structure of a network device 900 according to an embodiment of the present application.

[0074] Figure 10 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application.

[0075] Figure 11 is a schematic structural diagram of a chip 1100 according to an embodiment of the present application. DETAILED DESCRIPTION

[0076] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0077] It should be noted that the terms "first," "second," and the like in the description and claims of the embodiments of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. The objects described by the terms "first" and "second" may be the same or different.

[0078] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system or other communication systems.

[0079] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0080] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0081] The embodiments of the present application are not limited to the spectrum to which they are applied. For example, the embodiments of the present application can be applied to both licensed and unlicensed spectrum.

[0082] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a next-generation communication system, such as a terminal device in a NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network.

[0083] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0084] A network device may be a device used to communicate with a mobile device. The network device may be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0085] In an embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell may be a cell corresponding to a network device (for example, a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, picocells, femtocells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0086] Figure 1 The example diagram shows a terminal device, a source NG-RAN node, and a target NG-RAN node. The source node can be a source base station, and the target node can be a target base station. The terminal device performs a conditional handover from the source base station to the target base station.

[0087] Optionally, the wireless communication system 100 may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), which is not limited in the embodiments of the present application.

[0088] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0089] This embodiment of the application proposes a method for sending a radio link failure report. Figure 2 This is a flowchart of a method 200 for sending a radio link failure report according to an embodiment of the present application. The method can optionally be applied to Figure 1 The system shown, if applied to Figure 1 The terminal device in the system shown is, but not limited to, the method includes at least part of the following contents.

[0090] S210: Sending a CHO-related RLF report, where the CHO-related RLF report includes at least one of the following:

[0091] Signal measurement results of the terminal device on the neighboring cell;

[0092] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0093] A list of candidate cells that meet the handover execution / triggering conditions;

[0094] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0095] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives radio resource control (RRC) reconfiguration signaling;

[0096] Indication information of the handover execution condition type configured for the terminal;

[0097] Parameters corresponding to the configured switching execution conditions;

[0098] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0099] The length of time from receiving the CHO configuration to triggering the CHO;

[0100] Toggle type identification.

[0101] In some embodiments, the first cell includes a source cell.

[0102] Optionally, the neighboring cells include candidate cells and / or non-candidate cells.

[0103] Optionally, the handover type identifier is used to indicate whether the handover type is conditional handover or traditional handover, wherein traditional handover may refer to a handover mode other than conditional handover.

[0104] In the embodiment of the present application, the candidate cells may be determined in the following manner:

[0105] After receiving the terminal's measurement report, the source base station determines a range of possible target cells for conditional handover based on the terminal's measurement report. The source base station then negotiates with the base stations hosting these cells, inquiring whether they will accept the conditional handover. If the base station accepts the terminal's handover, it sends a handover request confirmation message to the source base station; this message also carries information such as the access resources and bearer configuration required for the terminal to access the target cell under that base station. Cells within the target cell range that confirm acceptance of the terminal's handover are considered candidate cells.

[0106] Optionally, the signal measurement result of the neighboring cell by the terminal device includes at least one of the following:

[0107] Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell;

[0108] Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell;

[0109] Until RLF is detected, the terminal device measures the signal of the neighboring cell;

[0110] Until HOF is detected, the terminal device measures the signal of the neighboring cell;

[0111] Until the signal measurement result of at least one candidate cell meets the switching execution / trigger condition, the terminal device measures the signal result of the neighboring cell.

[0112] Optionally, the signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following:

[0113] Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0114] Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0115] Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions;

[0116] Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions;

[0117] Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

[0118] Optionally, the signal measurement result includes at least one of the following:

[0119] Reference Signal Receiving Power (RSRP);

[0120] Reference Signal Receiving Quality (RSRQ);

[0121] Signal to Interference plus Noise Ratio (SINR)

[0122] Optionally, the number of parameters corresponding to the switching execution condition of the above configuration includes at least one of a frequency-specific offset, a cell-specific offset, an additional offset, a hysteresis, and a threshold.

[0123] The signal measurement result of the neighboring cell by the terminal device may be expressed in at least the following three forms:

[0124] In the first type, the signal measurement result of the terminal device on the neighboring cell includes the measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0125] The signal measurement result of the neighboring cell;

[0126] The cell ID of the neighboring cell;

[0127] Indication information of whether the neighboring cell is a candidate cell.

[0128] For example, an identifier is added to the measResultNR of the neighboring cell to identify whether the corresponding neighboring cell is a candidate cell, as shown below:

[0129]

[0130] As can be seen from the above example, an optional flag is added to measResultNR, namely isCandidateCell, and the possible values ​​of this flag are true (true) and false (false), respectively used to indicate that the cell is a candidate cell or not a candidate cell.

[0131] The second type is that the terminal device's signal measurement results for neighboring cells include a list of measurement results of neighboring cells corresponding to different synchronization signal blocks (SSB, Synchronization Signal Block) or channel status indicator reference signals (CSI-RS, Channel Status Indicator Reference Signal) frequencies, and the neighboring cell measurement result list contains the signal measurement results of each neighboring cell.

[0132] Furthermore, the list of the neighboring cell signal measurement results or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

[0133] For example, the neighboring cell measurement result list is specifically measResultNRList. A bitmap is added to measResultNRList to identify which cells in the list are candidate cells. Each bit in the bitmap corresponds to a cell and is used to indicate whether the cell is a candidate cell. For example, a bitmap containing 6 bits can identify a cell list containing 6 neighboring cells. When the bitmap is 000111, it indicates that the last 3 cells in the list are candidate cells.

[0134] The third type is that the signal measurement results of the terminal device on the neighboring cells include: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0135] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0136] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

[0137] For example, the original measResultNeighbourCell is split into two, namely measResultCandidateCell and measResultNonCandidateCell, wherein measResultCandidateCell includes the signal measurement results of the neighboring cells belonging to the candidate cell, and measResultNonCandidateCell includes the signal measurement results of the neighboring cells that do not belong to the candidate cell.

[0138] Optionally, when the above information for indicating whether RLF has occurred in the first cell of the terminal device until CHO is executed indicates that RLF has occurred, the above RLF report related to CHO also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell.

[0139] Optionally, when the RRC re-establishment / connection establishment is successful, the terminal device sends the above-mentioned CHO-related RLF report to the cell where the RRC re-establishment / connection establishment is successful.

[0140] Optionally, the above-mentioned RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

[0141] Optionally, the terminal device sends the above-mentioned RLF report related to CHO through the air interface.

[0142] The information contained in the above-mentioned RLF report related to CHO can be used to help the network optimize the configuration.

[0143] In the above case where the RRC re-establishment / connection establishment is successful, the terminal device sends an RLF report related to CHO to the cell where the RRC re-establishment / connection establishment is successful, and the network side optimizes the configuration according to the RLF report related to CHO in at least three ways:

[0144] The first way is as Figure 3 shown. Figure 3 This is a flowchart of an implementation method 300 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0145] like Figure 3 As shown, in the case of too early CHO, the terminal device performs RRC reestablishment towards the source cell. Afterwards, the terminal device directly reports the RLF report related to CHO to the base station where the source cell is located (ie, the source base station) via the air interface.

[0146] Afterwards, the source cell base station reports the CHO-related RLF report to the CHO target cell base station (i.e., target base station) via failure indication signaling. Optionally, the failure indication signaling carries a handover type information indication, which indicates whether the handover is conditional handover or traditional handover.

[0147] The target cell detects a premature handover through a detection mechanism and sends this information to the base station of the source cell via a handover report (HO report) on the Xn interface. Optionally, the HO report includes a handover type indication, indicating whether the handover is a conditional handover or a traditional handover.

[0148] The source cell optimizes the relevant parameters of the conditional handover execution / triggering condition based on the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell (such as the source cell) in the RLF report related to CHO. For example, in the case of handover failure, the relevant parameters of the optimized conditional handover execution / triggering condition include at least one of the following:

[0149] Increasing the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0150] Increase the signal threshold of the target cell corresponding to the A5 event;

[0151] Lower the signal threshold of the first cell corresponding to event A5.

[0152] The A3 event may refer to a neighboring cell measurement value being better than a serving cell measurement value by a certain threshold.

[0153] An A5 event may mean that the serving cell measurement value is less than a threshold 1, while the neighboring cell channel quality is greater than a threshold 2.

[0154] The second way is Figure 4 shown. Figure 4 This is a flowchart of an implementation method 400 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0155] like Figure 4 As shown in FIG, in the case of too late CHO, after the terminal loses connection with the source cell, it performs RRC reestablishment / connection to a certain cell and succeeds. Afterwards, the terminal sends the RLF report related to CHO to the cell via the air interface (such as Figure 3 Cell 1 in the ).

[0156] Finally, the cell sends a failure indication signaling to the source cell via the Xn interface, wherein the failure indication signaling includes the CHO-related RLF report. Optionally, the CHO-related RLF report may include indication information that the terminal device has received conditional handover configuration information.

[0157] The source cell optimizes the conditional handover triggering threshold by understanding the terminal's measurement results of neighboring cells and candidate cells when RLF occurs. For example, the source cell optimizes the relevant parameters of the conditional handover execution / triggering condition based on the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell (such as the source cell) in the RLF report related to CHO. For example, the relevant parameters of the optimized conditional handover execution / triggering condition include at least one of the following:

[0158] Increasing the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0159] Increase the signal threshold of the target cell corresponding to the A5 event;

[0160] Lower the signal threshold of the first cell corresponding to event A5.

[0161] Event A3 and event A5 have been introduced in the above implementation and will not be repeated here.

[0162] The third way is Figure 5 shown. Figure 5 This is a flowchart of an implementation method 500 of a terminal sending an RLF report related to CHO and a network side optimizing a configuration according to an embodiment of the present application.

[0163] like Figure 5 As shown, in the case of switching to the wrong cell (HO to wrong cell), the terminal switches to the wrong cell (such as Figure 5 RLF occurs shortly after the handover or HOF occurs during the handover process, and the terminal then heads to another cell (such as Figure 5 3) Perform RRC reestablishment / connection and succeed.

[0164] The terminal then sends a CHO-related RLF report to cell 3. Cell 3 sends the CHO-related RLF report to cell 2 via failure indication signaling.

[0165] In the case of HO to wrong cell, cell 2 determines that the HO is to the wrong cell, and sends a HO report containing an RLF report and handover failure indication information related to CHO to the source cell.

[0166] The source cell optimizes the conditional handover configuration based on the CHO-related RLF report. Optionally, in the event of a handover failure, the optimization method includes at least one of the following:

[0167] The cell where RRC reestablishment / connection establishment is successful (such as Figure 5 3) Add the cell in the candidate cell selection range;

[0168] Increase the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event for cells with successful RRC reestablishment / connection establishment in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0169] Increase the signal threshold of the target cell corresponding to the A5 event;

[0170] Lower the signal threshold of the first cell corresponding to event A5.

[0171] Event A3 and event A5 have been introduced in the above implementation and will not be repeated here.

[0172] Optionally, the cell where the RRC reestablishment / connection is successfully established (eg Figure 5 The optimization method of adding the cell 3) in the candidate cell selection range can be applied to the case where the previous candidate cell selection range does not include the cell.

[0173] Optionally, whether to add the cell with successful RRC re-establishment / connection establishment to the candidate cell selection range is determined according to the time until connection (timeUntilReconnction), that is, according to the time from connection failure to successful connection re-establishment.

[0174] Optionally, the source base station may adjust the handover threshold based on the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell contained in the RLF report related to CHO. For example, in the scenario of handover to wrong cell, in addition to adding the cell that is finally successfully rebuilt as the target candidate cell / downward adjusting the conditional handover execution / trigger threshold of the cell that is successfully rebuilt, if the terminal has RLF in the source cell when no handover is performed, the handover execution threshold can be adjusted accordingly based on the signal measurement result of the cell when RLF occurs.

[0175] In addition to the optimization methods described in the above implementation mode, which are applicable to the above three situations, the source base station may also adopt the following optimization methods:

[0176] Optimization method 1: Based on the handover type identifier in the RLF report related to CHO, determine whether the parameters corresponding to the execution / trigger conditions related to the conditional handover of CHO or the parameters corresponding to the measurement reporting conditions corresponding to other handover types need to be optimized.

[0177] Even if the terminal actually performs traditional handover, if the network has previously configured conditional handover configurations for the terminal, it means that the handover thresholds corresponding to these conditional handover resource configurations are set too high.

[0178] Optimization method 2: reducing access resources of candidate cells that do not need to be configured with CHO for the first terminal, where the first terminal is a terminal device that has a similar movement trajectory and / or reports a similar measurement report as the terminal device that sends the RLF report related to CHO.

[0179] Optionally, an optimization method for reducing access resources of candidate cells that do not need to be configured with CHO for the first terminal is implemented according to at least one of the following contents in the RLF report related to CHO:

[0180] Until conditional switching is performed, or until traditional switching is performed, or until RLF is detected, or until HOF is detected, or until the signal measurement results of at least one candidate cell meet the switching execution / trigger conditions, the terminal device's signal measurement results of candidate cells that do not meet the switching execution / trigger conditions, and / or the measurement results of candidate cells that meet the switching execution / trigger conditions, and / or the measurement results of candidate cells that do not meet the switching execution / trigger conditions.

[0181] Optimization method three: adding conditional RRC reconfiguration resources for the candidate cell of CHO for the first terminal, where the first terminal is a terminal device having a similar movement trajectory and / or reporting similar measurement reports as the terminal device sending the RLF report related to CHO.

[0182] Optionally, based on the signal measurement results of the terminal device on the neighboring cell until the conditional handover is performed, or the signal measurement results of the terminal device on the neighboring cell until the traditional handover is performed, or the signal measurement results of the terminal device on the neighboring cell until the RLF is detected, or the signal measurement results of the terminal device on the neighboring cell until the HOF is detected, or the signal measurement results of the terminal device on the neighboring cell until the signal measurement results of at least one candidate cell meet the handover execution / trigger condition, it is necessary to add resources of candidate cells for CHO in the conditional handover configuration. For example, if the measurement result of a certain cell is very high and this cell is not in the previously configured candidate cell range, then the neighboring cell is added as a candidate cell for CHO of the subsequent terminal.

[0183] Optimization method four: If the terminal device has experienced RLF in the first cell (for example, the source cell) until CHO is executed, and the time from receiving the CHO configuration to triggering CHO is too long, the source base station adjusts the CHO execution / triggering conditions of the target cell for the first terminal; wherein the first terminal is a terminal device having a similar mobile trajectory and / or reporting a similar measurement report to the terminal device that sends the RLF report related to CHO.

[0184] For example, the CHO execution / trigger condition of the target cell is adjusted to be easier to meet. Optionally, the magnitude of the adjustment can be determined based on the signal measurement result of the terminal device on the first cell (e.g., the source cell) when RLF occurs. Optionally, if the signal quality of the first cell (e.g., the source cell) is very poor, the magnitude of the condition adjustment is greater; for example, the trigger time (time-to-trigger) is adjusted to be shorter or the difference in signal threshold between the target cell and the source cell is reduced.

[0185] From the above embodiments, it can be seen that the terminal device sends the RLF report related to CHO. Using the content in the RLF report related to CHO, the network device can optimize the conditional handover configuration of the terminal device that needs to perform CHO in the future.

[0186] The present application also provides a method for receiving and applying a wireless link failure report. Figure 6 This is a flowchart of a method 600 for receiving and applying a wireless link failure report according to an embodiment of the present application. The method can optionally be applied to Figure 1 The system shown, if applied to Figure 1 The source base station in the system shown is, but not limited to, the source base station in the system shown. The method includes at least part of the following contents.

[0187] S610: Receive a CHO-related RLF report from a terminal device. The CHO-related RLF report includes at least one of the following:

[0188] Signal measurement results of the terminal device on the neighboring cell;

[0189] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0190] A list of candidate cells that meet the handover execution / triggering conditions;

[0191] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0192] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the RRC reconfiguration signaling;

[0193] Indication information of the handover execution condition type configured for the terminal;

[0194] Parameters corresponding to the configured switching execution conditions;

[0195] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0196] The length of time from receiving the CHO configuration to triggering the CHO;

[0197] Toggle type identification.

[0198] Optionally, the above method may further include: optimizing a conditional handover configuration according to the RLF report related to the CHO.

[0199] Optionally, the signal measurement result of the neighboring cell by the terminal device includes at least one of the following:

[0200] Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell;

[0201] Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell;

[0202] Until RLF is detected, the terminal device measures the signal of the neighboring cell;

[0203] Until the handover failure HOF is detected, the terminal device measures the signal of the neighboring cell;

[0204] Until the signal measurement result of at least one candidate cell meets the switching execution / trigger condition, the terminal device measures the signal result of the neighboring cell.

[0205] Optionally, the signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following:

[0206] Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0207] Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0208] Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions;

[0209] Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions;

[0210] Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

[0211] Optionally, the signal measurement result includes at least one of the following:

[0212] Reference signal received power RSRP;

[0213] Reference signal received quality RSRQ;

[0214] Signal to Interference and Noise Ratio SINR.

[0215] Optionally, the above parameters include at least one of a frequency-specific offset, a cell-specific offset, an additional offset, a hysteresis, and a threshold.

[0216] Optionally, the neighboring cells include candidate cells and / or non-candidate cells.

[0217] Optionally, the handover type identifier is used to indicate whether the handover type is conditional handover or traditional handover.

[0218] Optionally, the signal measurement result of the neighboring cell by the terminal device includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0219] Signal measurement results of neighboring cells;

[0220] The cell ID of the neighboring cell;

[0221] Indication information of whether the neighboring cell is a candidate cell.

[0222] Optionally, the signal measurement results of the neighboring cells by the terminal device include signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

[0223] Optionally, the list of signal measurement results of the neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

[0224] Optionally, the signal measurement result of the neighboring cell by the terminal device includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0225] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0226] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

[0227] Optionally, when it is indicated that RLF has occurred, the above-mentioned CHO-related RLF report also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results on the neighboring cell when the RLF occurs in the first cell.

[0228] Optionally, the above optimization condition switching configuration includes:

[0229] Optimize the relevant parameters of the conditional switching execution / triggering conditions based on the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell.

[0230] Optionally, in the event of a handover failure, the parameters related to the optimized conditional handover execution / triggering condition include at least one of the following:

[0231] Increasing the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0232] Increase the signal threshold of the target cell corresponding to the A5 event;

[0233] Lower the signal threshold of the first cell corresponding to event A5.

[0234] Optionally, when RLF occurs in the first cell, the parameters related to the optimized conditional handover execution / triggering condition include at least one of the following:

[0235] Reduce the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0236] Lower the signal threshold of the target cell corresponding to the A5 event;

[0237] Increase the signal threshold of the first cell corresponding to event A5.

[0238] Optionally, in the event of a handover failure, the optimized conditional handover configuration includes at least one of the following:

[0239] Add cells with successful RRC reestablishment / connection establishment to the candidate cell selection range;

[0240] Increase the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event for cells with successful RRC reestablishment / connection establishment in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0241] Increase the signal threshold of the target cell corresponding to the A5 event;

[0242] Lower the signal threshold of the first cell corresponding to event A5.

[0243] Optionally, the method further includes: determining, according to the handover type identifier, whether parameters corresponding to execution / trigger conditions related to conditional handover of CHO or parameters corresponding to measurement reporting conditions corresponding to handover of other handover types need to be optimized.

[0244] Optionally, the above optimization condition switching configuration includes:

[0245] Access resources of candidate cells that do not need to be configured with CHO are reduced for a first terminal, where the first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports similar measurement reports.

[0246] Optionally, the RRC reconfiguration resource is configured based on at least one of the following conditions for reducing candidate cells for which CHO is unnecessary:

[0247] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0248] A list of candidate cells that meet the handover execution / triggering conditions;

[0249] A list of candidate cells that do not meet the handover execution / trigger conditions.

[0250] Optionally, the above optimization condition switching configuration includes:

[0251] Conditional RRC reconfiguration resources are added for the first terminal to indicate that it is necessary to additionally configure a candidate cell for CHO, where the first terminal is a terminal device having a similar movement trajectory to the terminal device and / or reporting a similar measurement report.

[0252] Optionally, based on the signal measurement result of the terminal device on the neighboring cell, resources of the candidate cell for which it is necessary to additionally configure CHO are added to the conditional handover configuration.

[0253] Optionally, the above optimization condition switching configuration includes:

[0254] If RLF has occurred in the first cell for the terminal device until CHO is executed, and the time length from receiving the CHO configuration to triggering the CHO is equal to or exceeds the time length threshold, the CHO execution / triggering condition of the target cell is adjusted for the first terminal; the first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports similar measurement reports.

[0255] Optionally, the adjusting the CHO condition of the target cell includes: adjusting the CHO execution / triggering condition of the target cell to be easier to satisfy.

[0256] Optionally, the adjustment amplitude is determined according to the signal measurement result of the terminal device on the first cell when RLF occurs.

[0257] Optionally, the network device receives an RLF report related to CHO through an air interface.

[0258] Optionally, the network device receives a CHO-related RLF report through an Xn interface.

[0259] Optionally, the above-mentioned RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

[0260] Optionally, the network device receives a handover report through an Xn interface, where the handover report includes an RLF report and / or handover failure indication information related to the CHO.

[0261] The embodiment of the present application also provides a terminal device, Figure 7 7 is a schematic structural diagram of a terminal device 700 according to an embodiment of the present application, including:

[0262] The sending module 710 is configured to send a radio link failure (RLF) report related to a conditional handover (CHO). The RLF report related to the CHO includes at least one of the following:

[0263] Signal measurement results of the terminal device on the neighboring cell;

[0264] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0265] A list of candidate cells that meet the handover execution / triggering conditions;

[0266] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0267] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the radio resource control RRC reconfiguration signaling;

[0268] Indication information of the handover execution condition type configured for the terminal;

[0269] Parameters corresponding to the configured switching execution conditions;

[0270] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0271] The length of time from receiving the CHO configuration to triggering the CHO;

[0272] Toggle type identification.

[0273] Optionally, the signal measurement result of the neighboring cell by the terminal device includes at least one of the following:

[0274] Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell;

[0275] Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell;

[0276] Until RLF is detected, the terminal device measures the signal of the neighboring cell;

[0277] Until HOF is detected, the terminal device measures the signal of the neighboring cell;

[0278] Until the signal measurement result of at least one candidate cell meets the switching execution / trigger condition, the terminal device measures the signal result of the neighboring cell.

[0279] Optionally, the signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following:

[0280] Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0281] Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0282] Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions;

[0283] Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions;

[0284] Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

[0285] Optionally, the signal measurement result includes at least one of the following:

[0286] Reference signal received power RSRP;

[0287] Reference signal received quality RSRQ;

[0288] Signal to Interference and Noise Ratio SINR.

[0289] Optionally, the above parameters include at least one of a frequency-specific offset, a cell-specific offset, an additional offset, a hysteresis, and a threshold.

[0290] Optionally, the neighboring cells include candidate cells and / or non-candidate cells.

[0291] Optionally, the handover type identifier is used to indicate whether the handover type is conditional handover or traditional handover.

[0292] Optionally, the signal measurement result of the neighboring cell by the terminal device includes a measurement result of at least one neighboring cell, and the measurement result of the neighboring cell includes at least one of the following:

[0293] Signal measurement results of neighboring cells;

[0294] The cell ID of the neighboring cell;

[0295] Indication information of whether the neighboring cell is a candidate cell.

[0296] Optionally, the signal measurement results of the neighboring cells by the terminal device include signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

[0297] Optionally, the list of signal measurement results of the neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

[0298] Optionally, the signal measurement result of the neighboring cell by the terminal device includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0299] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0300] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

[0301] Optionally, when it is indicated that RLF has occurred, the above-mentioned CHO-related RLF report also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results on the neighboring cell when the RLF occurs in the first cell.

[0302] Optionally, in the case that the RRC re-establishment / connection establishment is successful, the sending module 710 sends an RLF report related to CHO to the cell where the RRC re-establishment / connection establishment is successful.

[0303] Optionally, the above-mentioned RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

[0304] Optionally, the sending module 710 sends a CHO-related RLF report via an air interface.

[0305] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiment of the present application are respectively to implement Figure 2 The corresponding process of the terminal device in the method 200 is not repeated here for the sake of brevity.

[0306] The embodiment of the present application also provides a network device, Figure 8 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present application, including:

[0307] The receiving module 810 is configured to receive a CHO-related RLF report from a terminal device, where the CHO-related RLF report includes at least one of the following:

[0308] Signal measurement results of the terminal device on the neighboring cell;

[0309] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0310] A list of candidate cells that meet the handover execution / triggering conditions;

[0311] A list of candidate cells that do not meet the handover execution / triggering conditions;

[0312] An identifier of a first cell, where the first cell includes a cell in which the terminal device receives the RRC reconfiguration signaling;

[0313] Indication information of the handover execution condition type configured for the terminal;

[0314] Parameters corresponding to the configured switching execution conditions;

[0315] Information indicating whether the terminal device has experienced RLF in the first cell until CHO is performed;

[0316] The length of time from receiving the CHO configuration to triggering the CHO;

[0317] Toggle type identification.

[0318] Figure 9 900 is a schematic diagram of the structure of a network device according to an embodiment of the present application. Figure 9 As shown, the above network device may further include: an optimization module 920, configured to optimize the conditional handover configuration according to the RLF report related to CHO.

[0319] Optionally, the signal measurement result of the neighboring cell by the terminal device includes at least one of the following:

[0320] Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell;

[0321] Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell;

[0322] Until RLF is detected, the terminal device measures the signal of the neighboring cell;

[0323] Until HOF is detected, the terminal device measures the signal of the neighboring cell;

[0324] Until the signal measurement result of at least one candidate cell meets the switching execution / trigger condition, the terminal device measures the signal result of the neighboring cell.

[0325] Optionally, the signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following:

[0326] Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0327] Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions;

[0328] Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions;

[0329] Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions;

[0330] Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

[0331] Optionally, the signal measurement result includes at least one of the following:

[0332] Reference signal received power RSRP;

[0333] Reference signal received quality RSRQ;

[0334] Signal to Interference and Noise Ratio SINR.

[0335] Optionally, the above parameters include at least one of a frequency-specific offset, a cell-specific offset, an additional offset, a hysteresis, and a threshold.

[0336] Optionally, the neighboring cells include candidate cells and / or non-candidate cells.

[0337] Optionally, the handover type identifier is used to indicate whether the handover type is conditional handover or traditional handover.

[0338] Optionally, the signal measurement result of the neighboring cell by the terminal device includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0339] Signal measurement results of neighboring cells;

[0340] The cell ID of the neighboring cell;

[0341] Indication information of whether the neighboring cell is a candidate cell.

[0342] Optionally, the signal measurement results of the neighboring cells by the terminal device include signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

[0343] Optionally, the list of signal measurement results of the neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

[0344] Optionally, the signal measurement result of the neighboring cell by the terminal device includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0345] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0346] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

[0347] Optionally, when it is indicated that RLF has occurred, the above-mentioned CHO-related RLF report also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results on the neighboring cell when the RLF occurs in the first cell.

[0348] Optionally, the optimization module 920 is used to:

[0349] Optimize the relevant parameters of the conditional switching execution / triggering conditions based on the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell when RLF occurs in the first cell.

[0350] Optionally, in the case where HOF occurs during handover, the parameters related to the optimized conditional handover execution / triggering condition include at least one of the following:

[0351] Increasing the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0352] Increase the signal threshold of the target cell corresponding to the A5 event;

[0353] Lower the signal threshold of the first cell corresponding to event A5.

[0354] Optionally, when RLF occurs in the first cell, the parameters related to the optimized conditional handover execution / triggering condition include at least one of the following:

[0355] Reduce the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event towards the target cell in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0356] Lower the signal threshold of the target cell corresponding to the A5 event;

[0357] Increase the signal threshold of the first cell corresponding to event A5.

[0358] Optionally, in the event of a handover failure, the optimized conditional handover configuration includes at least one of the following:

[0359] Add cells with successful RRC reestablishment / connection establishment to the candidate cell selection range;

[0360] Increase the hysteresis and / or offset corresponding to the conditional handover execution / triggering A3 event for cells with successful RRC reestablishment / connection establishment in the conditional handover configuration configured for terminals with similar movement trajectories and / or similar signal measurement results in the future;

[0361] Increase the signal threshold of the target cell corresponding to the A5 event;

[0362] Lower the signal threshold of the first cell corresponding to event A5.

[0363] Optionally, the optimization module 920 is further configured to determine, based on the handover type identifier, whether parameters corresponding to execution / trigger conditions related to CHO conditional handover or parameters corresponding to measurement reporting conditions corresponding to other handover types need to be optimized.

[0364] Optionally, the optimization module 920 is configured to reduce access resources of candidate cells that do not need to be configured with CHO for a first terminal, where the first terminal is a terminal device having a similar movement trajectory to the terminal device and / or reporting a similar measurement report.

[0365] Optionally, the RRC reconfiguration resource is configured based on at least one of the following conditions for reducing candidate cells for which CHO is unnecessary:

[0366] Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / trigger conditions;

[0367] A list of candidate cells that meet the handover execution / triggering conditions;

[0368] A list of candidate cells that do not meet the handover execution / trigger conditions.

[0369] Optionally, the optimization module 920 is configured to add conditional RRC reconfiguration resources for candidate cells for which CHO needs to be additionally configured for the first terminal, where the first terminal is a terminal device having a similar movement trajectory to the terminal device and / or reporting similar measurement reports.

[0370] Optionally, based on the signal measurement result of the terminal device on the neighboring cell, resources of the candidate cell for which it is necessary to additionally configure CHO are added to the conditional handover configuration.

[0371] Optionally, the optimization module 920 is used to:

[0372] If RLF has occurred in the first cell for the terminal device until CHO is executed, and the time length from receiving the CHO configuration to triggering the CHO is equal to or exceeds the time length threshold, the CHO execution / triggering condition of the target cell is adjusted for the first terminal; the first terminal is a terminal device with a similar mobile trajectory and / or reporting similar measurement reports to the terminal device.

[0373] Optionally, the adjusting the CHO condition of the target cell includes: adjusting the CHO execution / triggering condition of the target cell to be easier to satisfy.

[0374] Optionally, the adjustment amplitude is determined according to the signal measurement result of the terminal device on the first cell when RLF occurs.

[0375] Optionally, the receiving module 810 receives an RLF report related to CHO via an air interface.

[0376] Optionally, the receiving module 810 receives a CHO-related RLF report through an Xn interface.

[0377] Optionally, the above-mentioned RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

[0378] Optionally, the receiving module 810 receives a handover report through an Xn interface, where the handover report includes a CHO-related RLF report and / or handover failure indication information.

[0379] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiment of the present application are respectively to implement Figure 6 The corresponding process of the network device in the method 600 is not repeated here for the sake of brevity.

[0380] Figure 10 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. Figure 10 The communication device 1000 shown includes a processor 1010, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0381] Alternatively, as Figure 10 As shown, the communication device 1000 may further include a memory 1020. The processor 1010 may call and execute a computer program from the memory 1020 to implement the method in the embodiment of the present application.

[0382] The memory 1020 may be a separate device independent of the processor 1010 , or may be integrated into the processor 1010 .

[0383] Alternatively, as Figure 10 As shown, the communication device 1000 may further include a transceiver 1030 , and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0384] The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

[0385] Optionally, the communication device 1000 may be a terminal device of an embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0386] Optionally, the communication device 1000 may be a network device in an embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0387] Figure 11 is a schematic structural diagram of a chip 1100 according to an embodiment of the present application. Figure 11 The chip 1100 shown includes a processor 1110, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0388] Alternatively, as Figure 11 As shown, the chip 1100 may further include a memory 1120. The processor 1110 may call and execute a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0389] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0390] Optionally, the chip 1100 may further include an input interface 1130. The processor 1110 may control the input interface 1130 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0391] Optionally, the chip 1100 may further include an output interface 1140. The processor 1110 may control the output interface 1140 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0392] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0393] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0394] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0395] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0396] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM).

[0397] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be 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 link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0398] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0399] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0400] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0401] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for sending a wireless link failure report, applied to a terminal device, comprising: Sending a radio link failure (RLF) report related to conditional handover (CHO), where the RLF report related to CHO includes: Signal measurement results of the terminal device on the neighboring cell; Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / triggering conditions; The signal measurement result of the neighboring cell by the terminal device is used to add conditional RRC reconfiguration resources for candidate cells for which CHO needs to be additionally configured for the first terminal; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition is used to reduce the conditional RRC reconfiguration resources of the candidate cell that does not need to be configured with CHO for the first terminal; The first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports a similar measurement report.

2. The method according to claim 1, wherein The signal measurement result of the terminal device on the neighboring cell includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell; Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell; Until RLF is detected, the terminal device measures the signal of the neighboring cell; Until the handover failure HOF is detected, the terminal device measures the signal of the neighboring cell; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal result of the neighboring cell; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions; Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

3. The method according to claim 1, wherein The signal measurement result includes at least one of the following: Reference signal received power RSRP; Reference signal received quality RSRQ; Signal to Interference and Noise Ratio SINR.

4. The method according to any one of claims 1 to 3, wherein: The neighboring cells include candidate cells and / or non-candidate cells.

5. The method according to any one of claims 1 to 3, wherein the signal measurement result of the terminal device on the neighboring cell includes a measurement result of at least one neighboring cell, and the measurement result of the neighboring cell includes at least one of the following: a signal measurement result of the neighboring cell; The cell ID of the neighboring cell; Indication information of whether the neighboring cell is a candidate cell.

6. According to any one of the methods described in claims 1 to 3, the signal measurement results of the neighboring cells by the terminal device include the signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

7. The method according to claim 6, wherein: The list of signal measurement results of neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

8. The method according to any one of claims 1 to 3, wherein the signal measurement result of the terminal device on the neighboring cell comprises: A first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein, The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell; The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

9. The method according to any one of claims 1 to 3, wherein: In the case where the RRC re-establishment / connection establishment is successful, the terminal device sends the CHO-related RLF report to the cell where the RRC re-establishment / connection establishment is successful.

10. The method according to claim 9, wherein: The CHO-related RLF report also includes indication information that the terminal device has received conditional handover configuration information.

11. The method according to any one of claims 1 to 3, wherein: The terminal device sends the RLF report related to CHO through the air interface.

12. A method for receiving and applying a wireless link failure report, applied to a network device, comprising: Receive a CHO-related RLF report from a terminal device, where the CHO-related RLF report includes: Signal measurement results of the terminal device on the neighboring cell; Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / triggering conditions; The method further comprises: Adding, for the first terminal, conditional RRC reconfiguration resources for candidate cells for which additional CHO configuration is necessary, based on the signal measurement result of the neighboring cell by the terminal device; reducing, for the first terminal, conditional RRC reconfiguration resources for candidate cells for which CHO is unnecessary, based on a signal measurement result of the terminal device on the candidate cells that do not meet the handover execution / triggering condition; The first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports a similar measurement report.

13. The method according to claim 12, wherein: The signal measurement result of the terminal device on the neighboring cell includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell; Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell; Until RLF is detected, the terminal device measures the signal of the neighboring cell; Until HOF is detected, the terminal device measures the signal of the neighboring cell; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal result of the neighboring cell; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions; Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

14. The method according to claim 12, wherein: The signal measurement result includes at least one of the following: Reference signal received power RSRP; Reference signal received quality RSRQ; Signal to Interference and Noise Ratio SINR.

15. The method according to any one of claims 12 to 14, wherein: The neighboring cells include candidate cells and / or non-candidate cells.

16. The method according to any one of claims 12 to 14, wherein the signal measurement result of the terminal device on the neighboring cell includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following: a signal measurement result of the neighboring cell; The cell ID of the neighboring cell; Indication information of whether the neighboring cell is a candidate cell.

17. According to the method described in any one of claims 12 to 14, the signal measurement results of the neighboring cells by the terminal device include the signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

18. The method according to claim 17, wherein The list of signal measurement results of neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

19. The method according to any one of claims 12 to 14, wherein the signal measurement result of the terminal device on the neighboring cell comprises: A first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein, The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell; The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

20. The method according to any one of claims 12 to 14, wherein: The network device receives the RLF report related to the CHO through an air interface.

21. The method according to any one of claims 12 to 14, wherein: The network device receives the CHO-related RLF report through the Xn interface.

22. The method according to claim 21, wherein The RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

23. The method according to any one of claims 12 to 14, wherein: The network device receives a handover report through an Xn interface, where the handover report includes the CHO-related RLF report and / or handover failure indication information.

24. A terminal device comprising: A sending module, configured to send a radio link failure (RLF) report related to conditional handover (CHO), wherein the RLF report related to CHO includes: Signal measurement results of the terminal device on the neighboring cell; Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / triggering conditions; The signal measurement result of the neighboring cell by the terminal device is used to add conditional RRC reconfiguration resources for candidate cells for which CHO needs to be additionally configured for the first terminal; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition is used to reduce the conditional RRC reconfiguration resources of the candidate cell that does not need to be configured with CHO for the first terminal; The first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports a similar measurement report.

25. The terminal device according to claim 24, wherein: The signal measurement result of the terminal device on the neighboring cell includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell; Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell; Until RLF is detected, the terminal device measures the signal of the neighboring cell; Until HOF is detected, the terminal device measures the signal of the neighboring cell; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal result of the neighboring cell; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions; Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

26. The terminal device according to claim 24, wherein: The signal measurement result includes at least one of the following: Reference signal received power RSRP; Reference signal received quality RSRQ; Signal to Interference and Noise Ratio SINR.

27. The terminal device according to any one of claims 24 to 26, wherein: The neighboring cells include candidate cells and / or non-candidate cells.

28. The terminal device according to any one of claims 24 to 26, wherein the signal measurement result of the terminal device on the neighboring cell includes a measurement result of at least one neighboring cell, and the measurement result of the neighboring cell includes at least one of the following: a signal measurement result of the neighboring cell; The cell ID of the neighboring cell; Indication information of whether the neighboring cell is a candidate cell.

29. The terminal device according to any one of claims 24 to 26, wherein the signal measurement results of the neighboring cells by the terminal device include the signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

30. The terminal device according to claim 29, wherein: The list of signal measurement results of neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

31. The terminal device according to any one of claims 24 to 26, wherein the signal measurement result of the terminal device on the neighboring cell comprises: A first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein, The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell; The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

32. The terminal device according to any one of claims 24 to 26, wherein: In the case that the RRC re-establishment / connection establishment is successful, the sending module sends the CHO-related RLF report to the cell in which the RRC re-establishment / connection establishment is successful.

33. The terminal device according to claim 32, wherein: The CHO-related RLF report also includes indication information that the terminal device has received conditional handover configuration information.

34. The terminal device according to any one of claims 24 to 26, wherein: The sending module sends the RLF report related to CHO through an air interface.

35. A network device comprising: A receiving module, configured to receive a CHO-related RLF report from a terminal device, where the CHO-related RLF report includes: Signal measurement results of the terminal device on the neighboring cell; Signal measurement results of the terminal device on candidate cells that do not meet the handover execution / triggering conditions; an optimization module, configured to add, for the first terminal, conditional RRC reconfiguration resources for candidate cells for which CHO is necessary to be additionally configured, based on a signal measurement result of the terminal device on a neighboring cell; The optimization module is further configured to reduce, for the first terminal, conditional RRC reconfiguration resources for candidate cells for which CHO is unnecessary, based on a signal measurement result of the terminal device on the candidate cells that do not meet the handover execution / triggering condition; The first terminal is a terminal device that has a similar movement trajectory to the terminal device and / or reports a similar measurement report.

36. The network device according to claim 35, wherein: The signal measurement result of the terminal device on the neighboring cell includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the neighboring cell; Until the traditional handover is performed, the terminal device measures the signal of the neighboring cell; Until RLF is detected, the terminal device measures the signal of the neighboring cell; Until HOF is detected, the terminal device measures the signal of the neighboring cell; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal result of the neighboring cell; The signal measurement result of the terminal device on the candidate cell that does not meet the handover execution / triggering condition includes at least one of the following: Until the conditional handover is executed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until a traditional handover is performed, the terminal device measures the signal of the candidate cells that do not meet the handover execution / triggering conditions; Until RLF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / trigger conditions; Until HOF is detected, the terminal device measures the signal results of candidate cells that do not meet the handover execution / triggering conditions; Until the signal measurement result of at least one candidate cell meets the handover execution / trigger condition, the terminal device measures the signal results of the candidate cells that do not meet the handover execution / trigger condition.

37. The network device according to claim 35, wherein: The signal measurement result includes at least one of the following: Reference signal received power RSRP; Reference signal received quality RSRQ; Signal to Interference and Noise Ratio SINR.

38. The network device according to any one of claims 35 to 37, wherein: The neighboring cells include candidate cells and / or non-candidate cells.

39. The network device according to any one of claims 35 to 37, wherein the signal measurement result of the terminal device on the neighboring cell includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following: a signal measurement result of the neighboring cell; The cell ID of the neighboring cell; Indication information of whether the neighboring cell is a candidate cell.

40. According to the network device according to any one of claims 35 to 37, the signal measurement results of the terminal device on the neighboring cells include the signal measurement results of at least one neighboring cell corresponding to the frequency of at least one synchronization signal block SSB or channel state indication reference signal CSI-RS.

41. The network device according to claim 40, wherein: The list of signal measurement results of neighboring cells or the signal measurement results of each neighboring cell further includes information indicating whether each neighboring cell is a candidate cell.

42. The network device according to any one of claims 35 to 37, wherein the signal measurement result of the terminal device on the neighboring cell comprises: A first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein, The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell; The second neighboring cell measurement result list includes signal measurement results of neighboring cells that are not candidate cells.

43. The network device according to any one of claims 35 to 37, wherein: The receiving module receives the RLF report related to CHO through an air interface.

44. The network device according to any one of claims 35 to 37, wherein: The receiving module receives the RLF report related to CHO through the Xn interface.

45. The network device according to claim 44, wherein The RLF report related to CHO also includes indication information that the terminal device has received conditional handover configuration information.

46. ​​The network device according to any one of claims 35 to 37, wherein: The receiving module receives a handover report through an Xn interface, where the handover report includes the CHO-related RLF report and / or handover failure indication information.

47. A terminal device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 11.

48. A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 12 to 23.

49. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 11.

50. A chip, comprising: A processor, configured to call and execute a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 12 to 23.

51. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 11.

52. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 12 to 23.

53. A computer program product comprising computer program instructions for causing a computer to perform the method according to any one of claims 1 to 11.

54. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 12 to 23.

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