Information transmission method and device, storage medium and program product

Abstract

The invention provides an information transmission method and device, a storage medium and a program product, and relates to the technical field of wireless communication. The method comprises the following steps: recording switching failure information which comprises time information when switching failure occurs, first identification information of a source cell and second identification information of a target cell; and sending switching failure information to the network device. According to the method and the device, the phenomenon of switching failure caused by premature switching of the non-ground network can be reduced, so that the robustness of time-based condition switching in the non-ground network can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and in particular to an information transmission method, apparatus, storage medium, and program product. Background Technology

[0002] To reduce operators' capital expenditures, operating costs, and human resource investment, it is necessary to collect and utilize big data to achieve more efficient resource and mobility management, and to quickly locate unexpected problems.

[0003] Related technologies have introduced network self-optimization features, among which mobility self-optimization is one of the most important functions. Although there are mobility self-optimization methods for terrestrial networks, there are no mobility self-optimization schemes for non-terrestrial networks. Because satellites (base stations) are very far from the Earth, the signal strength received by terminals within the same satellite (base station) beam coverage area is not significantly different, making traditional handover mechanisms based on signal strength unsuitable in this situation. Summary of the Invention

[0004] One technical problem this disclosure aims to solve is to provide an information transmission method, apparatus, storage medium, and program product that can reduce network handover failures caused by premature handover.

[0005] According to one aspect of this disclosure, an information transmission method is proposed, comprising: recording handover failure information, wherein the handover failure information includes time information when the handover failure occurs, a first identifier of the source cell and a second identifier of the target cell; and sending the handover failure information to a network device.

[0006] In some embodiments, the handover failure information may further include: the service downtime of the source cell, or the difference between the time of the handover failure and the service downtime of the source cell.

[0007] In some embodiments, the handover failure information may further include: the service start time of the target cell, or the difference between the time when the handover failure occurred and the service start time of the target cell.

[0008] In some embodiments, the handover failure information may further include at least one of the following: third identification information of the candidate cell, service start time of the candidate cell, the difference between the time of the handover failure and the service start time of the candidate cell, and conditional event indication of the network configuration.

[0009] In some embodiments, the handover failure information may also include fourth identification information of the cell selected by the user equipment when initiating Radio Resource Control (RRC) reconstruction.

[0010] In some embodiments, in the event of a failure to rebuild the user equipment RRC, the handover failure information may also include the time elapsed from the handover failure to the user equipment entering the RRC connected state.

[0011] In some embodiments, the handover failure information may also include the fifth identification information of the cell when the user equipment enters the RRC connected state.

[0012] In some embodiments, the time information at the time of handover failure includes at least one of the following: the time when the user equipment executes a Radio Resource Control (RRC) reconfiguration message containing synchronization reconfiguration; the difference between the time when the user equipment executes the RRC reconfiguration message containing synchronization reconfiguration and a time threshold in the conditional events of the network configuration; the time when the user equipment performs conditional reconfiguration; the difference between the time when the user equipment performs conditional reconfiguration and a time threshold in the conditional events of the network configuration; the difference between the time at which handover failure occurs and a time threshold in the conditional events of the network configuration; and the Coordinated Universal Time (UTC) time measured by the user equipment at the time of handover failure.

[0013] In some embodiments, the handover failure information further includes first indication information, which is used to indicate that the source cell is a non-terrestrial network cell.

[0014] In some embodiments, the handover failure information further includes second indication information, which is used to indicate that the target cell is a non-terrestrial network cell.

[0015] In some embodiments, the handover failure information may also include a failure type, wherein the failure type is a non-terrestrial network handover failure.

[0016] In some embodiments, the handover failure information may also include a handover type, wherein the handover type is a time-based conditional handover.

[0017] In some embodiments, the first identification information includes at least one of a first global cell identifier and a first tracking area list; the second identification information includes at least one of a second global cell identifier and a second tracking area list.

[0018] In some embodiments, the third identification information includes at least one of a third global cell identifier and a third tracking area list.

[0019] In some embodiments, the fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

[0020] In some embodiments, the fifth identification information includes at least one of the fifth global cell identifier and the fifth tracking area list.

[0021] In some embodiments, a third indication message is sent to the network device, the third indication message including an indication message that the user equipment has available handover failure information; and a request message is received from the network device, the request message being used to instruct the user equipment to send handover failure information.

[0022] According to another aspect of this disclosure, an information transmission method is also proposed, comprising: receiving handover failure information sent by a user equipment, wherein the handover failure information includes time information when the handover failure occurs, a first identifier of the source cell and a second identifier of the target cell; and adjusting the network configuration based on the handover failure information.

[0023] In some embodiments, the handover failure information may also include the service downtime of the source cell, or the difference between the time of the handover failure and the service downtime of the source cell.

[0024] In some embodiments, the handover failure information may also include the service start time of the target cell, or the difference between the time of the handover failure and the service start time of the target cell.

[0025] In some embodiments, the handover failure information may further include at least one of the following: third identification information of the candidate cell, service start time of the candidate cell, the difference between the time of the handover failure and the service start time of the candidate cell, and conditional event indication of the network configuration.

[0026] In some embodiments, the handover failure information may also include fourth identification information of the cell selected by the user equipment when initiating Radio Resource Control (RRC) reconstruction.

[0027] In some embodiments, the handover failure information may also include the time elapsed from the handover failure to the user equipment entering the RRC connected state.

[0028] In some embodiments, the handover failure information may also include the fifth identification information of the cell in which the user equipment has entered the RRC connected state.

[0029] According to another aspect of this disclosure, a user equipment is also provided, comprising: a recording module configured to record handover failure information, wherein the handover failure information includes time information when the handover failure occurs, a first identifier of the source cell and a second identifier of the target cell; and a first transceiver module configured to send the handover failure information to a network device.

[0030] According to another aspect of this disclosure, a network device is also proposed, comprising: a second transceiver module configured to receive handover failure information sent by a user equipment, wherein the handover failure information includes time information when the handover failure occurs, a first identifier of the source cell, and a second identifier of the target cell; and an adjustment module configured to adjust the network configuration based on the handover failure information.

[0031] According to another aspect of this disclosure, an information transmission apparatus is also proposed, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the information transmission method as described above based on instructions stored in the memory.

[0032] According to another aspect of this disclosure, a computer-readable storage medium is also proposed, on which computer program instructions are stored, which, when executed by a processor, implement the information transmission method as described above.

[0033] According to another aspect of this disclosure, a computer program product is also proposed, comprising a computer program or instructions that, when executed by a processor, implement the aforementioned information transmission method.

[0034] In this embodiment of the disclosure, the user equipment sends the time information when a handover failure occurs, as well as the identification information of the source cell and the target cell, to the network device. This enables the network device to obtain the necessary information for the time-based conditional handover failure scenario in a timely manner, analyze the cause of the time-based conditional handover failure, and make targeted adjustments and optimizations. This reduces the handover failure phenomenon caused by premature handover in non-terrestrial networks, thereby improving the robustness of time-based conditional handover in non-terrestrial networks.

[0035] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0036] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0037] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0038] Figure 1 This is a flowchart illustrating some embodiments of the information transmission method disclosed herein;

[0039] Figure 2 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0040] Figure 3 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0041] Figure 4 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0042] Figure 5 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0043] Figure 6 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0044] Figure 7 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0045] Figure 8 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0046] Figure 9 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0047] Figure 10 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein;

[0048] Figure 11 These are schematic diagrams illustrating the structure of some embodiments of the user equipment disclosed herein;

[0049] Figure 12 These are schematic diagrams illustrating the structure of some embodiments of the network devices disclosed herein;

[0050] Figure 13 This is a schematic diagram of the structure of some embodiments of the information transmission device disclosed herein. Detailed Implementation

[0051] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0052] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0053] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0054] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0055] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0057] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0058] Traditional signal strength-based handover mechanisms are not suitable for non-terrestrial network applications. This disclosure presents a time-based conditional handover mechanism, which is applicable to non-terrestrial network scenarios, particularly those involving non-geosynchronous orbit satellites with controllable satellite beams. This means the satellite beam covers a geographical area in the current time period and another geographical area in the next. The solutions described below will be illustrated with various embodiments.

[0059] Figure 1 This is a flowchart illustrating some embodiments of the information transmission method disclosed herein. This embodiment is executed by a user equipment and includes steps S110-S120. The user equipment, which may be referred to as a terminal device or terminal, is a device with wireless transceiver capabilities, capable of communicating with one or more core networks (CNs) via an access network device in a radio access network (RAN). It can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can also be deployed on water, such as on a ship; and it can be deployed in the air, such as on an airplane, balloon, or satellite. User equipment can be mobile phones, tablets, computers with wireless transceiver capabilities, VR (virtual reality) terminal devices, AR (augmented reality) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.

[0060] In step S110, handover failure information is recorded, including the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell.

[0061] This switching failure message can also be called a connection failure message.

[0062] In some embodiments, when a user equipment (UE) experiences a non-terrestrial network (NTN) conditional handover failure, it records handover failure information. For example, the UE determines whether to handover based on conditional events configured in the network device. If it determines that the time-based conditional handover conditions are met, it performs a handover to the target network device. However, if the target network device has not yet moved to the coverage area of ​​the UE, the handover fails. In the event of a handover failure, the UE records the time information of the handover failure, the first identifier information of the source cell, and the second identifier information of the target cell.

[0063] This time information is, for example, UTC (Universal Time Coordinated) time information. In some embodiments, this time information includes: the time when the user equipment executes an RRCReconfiguration (Radio Resource Control Reconfiguration) message containing reconfigurationWithSync; the difference between the time when the user equipment executes the RRCReconfiguration message containing reconfigurationWithSync and a time threshold in the conditional events of network configuration; the time when the user equipment performs conditional reconfiguration; the difference between the time when the user equipment performs conditional reconfiguration and a time threshold in the conditional events of network configuration; the difference between the time when a handover failure occurs and a time threshold in the conditional events of network configuration; and the UTC time measured by the user equipment when a handover failure occurs.

[0064] Compared to user equipment directly sending time information, sending time difference can save signaling resources.

[0065] In some embodiments, the handover failure information further includes first indication information, which indicates that the source cell is an NTN cell. For example, when a user equipment handes over from an NTN cell to a regular cell or an NTN cell, a network handover failure may occur due to premature handover.

[0066] In other embodiments, the handover failure information also includes second indication information, which indicates that the target cell is a non-terrestrial network cell. For example, when a user equipment performs a handover from a regular cell or an NTN cell to an NTN cell, a network handover failure may occur due to premature handover.

[0067] In some embodiments, the first identification information includes at least one of a first global cell identifier and a first tracking area list. The second identification information includes at least one of a second global cell identifier and a second tracking area list.

[0068] For example, the user equipment records the global cell identifier and tracking area list of the source cell, and the global cell identifier and tracking area list of the target cell. Alternatively, the user equipment records the global cell identifier of the source cell and the global cell identifier of the target cell. Or, the user equipment records the tracking area list of the source cell and the tracking area list of the target cell.

[0069] In this step, the satellite beam is projected onto the ground, covering a very large cell area, generally capable of covering multiple tracking areas on the ground. Therefore, in this embodiment, a tracking area list is used to identify non-terrestrial network cells.

[0070] In some embodiments, the handover failure information may also include a failure type, wherein the failure type is a non-terrestrial network handover failure.

[0071] The failover information also includes the failover type, where the failover type is a time-based conditional failover.

[0072] In step S120, a handover failure message is sent to the network device.

[0073] The network device is, for example, a non-terrestrial network device, such as a satellite or base station.

[0074] Network devices collect measurement information when user equipment experiences handover failures, connection establishment failures, or other failures during mobility. They analyze this information, and if the analysis indicates that the failure is caused by unreasonable mobility parameter settings, the network devices adjust these settings to improve network performance and user experience.

[0075] In some embodiments, the network device compares the time information of the handover failure recorded by the user equipment with the expected handover time to determine whether premature handover has occurred. Then, based on the source cell identifier information and the target cell identifier information, it can determine which cell parameters need to be adjusted. In cases where premature handover leads to failure, the non-terrestrial network device can increase the time threshold of conditional event T1 to reduce handover failures caused by premature handover. If the handover failure is caused by a coverage vulnerability, the non-terrestrial network device can adjust its transmit power to compensate for the coverage vulnerability and reduce handover failures.

[0076] In related technologies, only the case of handover failure in terrestrial networks is considered, without considering the case of handover failure in non-terrestrial networks. In this embodiment, the user equipment sends the time information when the handover failure occurs, as well as the identification information of the source cell and the target cell, to the network equipment. This enables the network equipment to obtain the necessary information for the time-based conditional handover failure scenario in a timely manner, analyze the cause of the time-based conditional handover failure, and make targeted adjustments and optimizations. This reduces the handover failure phenomenon caused by premature handover in non-terrestrial networks, thereby improving the robustness of time-based conditional handover in non-terrestrial networks.

[0077] The following is based on Figure 2 Examples of other embodiments of this disclosure will be described below.

[0078] Figure 2 This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment is executed by a user equipment and includes steps S210-S220.

[0079] In step S210, handover failure information is recorded, wherein the handover failure information includes the time information when the handover failure occurred and the service stop time of the source cell, or the difference between the time when the handover failure occurred and the service stop time of the source cell.

[0080] For example, the time in this step is UTC time.

[0081] In step S220, a handover failure message is sent to the network device.

[0082] In some embodiments, if the service downtime of the source cell is significantly longer than the time when the handover failure occurs, it indicates that a premature handover has caused a network handover failure. Alternatively, if the time of the handover failure is less than the expected handover time, and the difference between the time of the handover failure and the service downtime of the source cell meets a preset condition, it indicates that a premature handover has caused a handover failure. In the case of premature handover failure, non-terrestrial network devices can increase the time threshold of conditional event T1 to reduce handover failures caused by premature handover.

[0083] In the above embodiments, the non-terrestrial network device can determine whether the handover failure is because the handover was performed after the current non-terrestrial network cell service stop time has elapsed, based on the service stop time and the time recorded by the user equipment when the handover failure occurred.

[0084] The following is based on Figure 3 Examples of other embodiments of this disclosure will be described below.

[0085] Figure 3This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment is executed by a user equipment and includes steps S310-S320.

[0086] In step S310, handover failure information is recorded, wherein the handover failure information includes the time information when the handover failure occurred and the start time of service of the target cell, or the difference between the time when the handover failure occurred and the start time of service of the target cell.

[0087] For example, the time in this step is UTC time.

[0088] In step S320, a handover failure message is sent to the network device.

[0089] In some embodiments, if the service start time of the target cell is greater than the failed handover time, it can be determined that a premature handover has caused a network handover failure. Alternatively, if the time information of the handover failure is less than the expected handover time, and the difference between the time of the handover failure and the service start time of the target cell meets a preset condition, it indicates that a premature handover has caused a network handover failure.

[0090] In some embodiments of this disclosure, the user equipment also records the third identification information of the candidate cell, the service start time of the candidate cell, the difference between the time of the handover failure and the service start time of the candidate cell, the conditional event indication of the network configuration, and other handover failure information, and sends the handover failure information to the network device.

[0091] The third identification information is, for example, at least one of the third global cell identifier and the third tracking area list.

[0092] If the handover failure occurs after the candidate cell's service start time, it indicates that there are other cells besides the target cell that meet the handover criteria. These cells can be used for subsequent network optimization. Based on the identification information of the candidate cell, the network equipment can identify other cells that may meet the handover criteria when the user equipment experiences a handover failure.

[0093] The network-configured conditional event indicator is used to indicate conditional events A3, A4, and A5 configured together with time-based conditional events. For example, the conditional event indicator can be a trigger event, such as conditional event A3, conditional event A4, or conditional event A5. When configuring a conditional handover event T1 for a user equipment (UE), the network often configures conditional events A3, A4, and A5 together. The UE will only initiate the signal measurement process when the conditions of conditional handover event T1 are met, and further determine whether to perform a handover based on the signal measurement results. Therefore, sending the network-configured conditional event indicator to the network device allows the network to optimize the parameter settings of conditional handover event T1 and the parameters of conditional events A3, A4, and A5 simultaneously. For example, event A4 indicates that a handover to a neighboring cell can be initiated when the neighboring cell signal strength exceeds a certain threshold. If the network configures event A4 for the UE, but the UE's connection is not restored through a handover triggered by conditional event A4 after a time-based conditional handover failure, it indicates that configuring event A4 may not be an appropriate decision, and there is room for optimization.

[0094] In other embodiments of this disclosure, the user equipment further records the fourth identification information of the cell selected when the user equipment initiates RRC reconstruction, and sends the fourth identification information to the network device. The network device determines whether premature handover has occurred by comparing whether the fourth identification information is consistent with the first identification information. The fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

[0095] For example, if a user equipment initiates an RRC reconstruction process due to a handover failure, and the selected cell is configured with condition event T1 and meets the leave condition, the cell identifier or tracking area list of the cell in which the user equipment attempted to reconstruct the RRC is recorded. If the cell identifier or tracking area list of the reconstructed cell matches the cell identifier or tracking area list of the source cell, it indicates that an premature handover has occurred.

[0096] In some embodiments, in the event of a failure to rebuild the user equipment RRC, the user equipment also records the time elapsed from the handover failure to the user equipment entering the RRC connected state.

[0097] For example, if the user equipment fails to rebuild RRC, when it receives the RRC establishment message again, if the user equipment has experienced a handover failure and has handover failure information, the time elapsed from the handover failure to the present is recorded, that is, the time elapsed from the execution of the rebuild failure to the next time the user equipment enters the RRC connection state.

[0098] After receiving a notification of a user equipment (UE) handover failure and the time elapsed between the UE entering RRC connected state, the network device checks if this time is less than a specific value. If the time is less than the specific value, it indicates that the UE handover failure was caused by improper handover parameter settings. If the time is greater than the specific value, it indicates that the UE handover failure was caused by an overlay vulnerability.

[0099] The user equipment can also record the fifth identification information of the cell when the user equipment enters the RRC connected state. By comparing this fifth identification information with the first and second identification information, the network device determines whether a premature handover or an incorrect handover has occurred, and then decides what optimization strategy to adopt. The fifth identification information includes at least one of the fifth global cell identifier and the fifth tracking area list.

[0100] For example, if the fifth identification information is consistent with the first identification information, it indicates that a premature handover has occurred; if the fifth identification information is inconsistent with both the first and second identification information, it indicates that an incorrect handover has occurred.

[0101] In other embodiments of this disclosure, the user equipment also sends third indication information to the network device, the third indication information including indication information that the user equipment has available handover failure information; and receives request information sent by the network device, the request information being used to instruct the user equipment to send handover failure information.

[0102] In this way, network devices can obtain non-terrestrial network handover failure information in a timely manner without wasting signaling resources, and avoid situations where the network blindly requests non-terrestrial network failure information when the user equipment does not have the required handover failure information.

[0103] In the above embodiments, no manual testing or data collection is required, saving labor costs.

[0104] Figure 4 The following is a flowchart illustrating another embodiment of the information transmission method disclosed herein, which is performed by a network device, such as a non-terrestrial network device, such as a satellite or base station, and includes steps S410-S420.

[0105] In step S410, a handover failure message sent by the user equipment is received, wherein the handover failure message includes the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell.

[0106] In some embodiments, when an NTN condition handover failure occurs, the user records the time information of the handover failure, the first identifier information of the source cell, and the second identifier information of the target cell, and sends the time information of the handover failure, the first identifier information of the source cell, and the second identifier information of the target cell to the network device.

[0107] This time information is, for example, UTC time information. In some embodiments, this time information includes: the UTC time when the user equipment executes an RRCReconfiguration message containing reconfigurationWithSync, the difference between the UTC time when the user equipment executes an RRCReconfiguration message containing reconfigurationWithSync and a time threshold in the conditional event of network configuration, the UTC time when the user equipment performs a conditional reconfiguration, the difference between the UTC time when the user equipment performs a conditional reconfiguration and a time threshold in the conditional event of network configuration, the difference between the UTC time when a handover failure occurs and a time threshold in the conditional event of network configuration, and the UTC time measured by the user equipment when a handover failure occurs, etc.

[0108] In some embodiments, the first identification information includes at least one of a first global cell identifier and a first tracking area list. The second identification information includes at least one of a second global cell identifier and a second tracking area list.

[0109] For example, the network device receives the global cell identifier and tracking area list of the source cell, and the global cell identifier and tracking area list of the target cell, sent by the user equipment. Alternatively, it receives the global cell identifier of the source cell and the global cell identifier of the target cell, sent by the user equipment. Or, it receives the tracking area list of the source cell and the tracking area list of the target cell, sent by the user equipment.

[0110] In some embodiments, the network device also receives first indication information sent by the user equipment, the first indication information being used to indicate that the source cell is an NTN cell.

[0111] The network device can also receive a second indication information sent by the user equipment, which is used to indicate that the target cell is a non-terrestrial network cell.

[0112] In some embodiments, the network device also receives a failure type sent by the user equipment, wherein the failure type is a non-terrestrial network handover failure.

[0113] The network device can also receive handover types sent by user equipment, where the handover type is a time-based conditional handover.

[0114] In step S420, the network configuration is adjusted based on the handover failure information.

[0115] For example, network devices can compare the time information of the handover failure recorded by the user equipment with the expected handover time to determine whether a premature handover has occurred. Then, based on the source cell identifier information and the target cell identifier information, they can determine which cell parameters need to be adjusted.

[0116] In this embodiment, the network device analyzes the reasons for the time-based conditional handover failure based on the time information sent by the user equipment when the handover failure occurs, as well as the identification information of the source cell and the target cell, and makes targeted adjustments and optimizations, thereby improving the robustness of time-based conditional handover in non-terrestrial networks.

[0117] The following is based on Figure 5 Examples of other embodiments of this disclosure will be described below.

[0118] Figure 5 This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment is performed by a network device and includes steps S510-S520.

[0119] In step S510, a handover failure message sent by the user equipment is received. The handover failure message includes the time information when the handover failure occurred and the service stop time of the source cell, or the difference between the time when the handover failure occurred and the service stop time of the source cell.

[0120] In step S520, the network configuration is adjusted based on the handover failure information.

[0121] In some embodiments, if the service downtime of the source cell is significantly longer than the time when the handover failure occurs, it indicates that a handover failure has occurred due to premature handover. Alternatively, if the time of the handover failure is less than the expected handover time, and the difference between the time of the handover failure and the service downtime of the source cell meets a preset condition, it indicates that a handover failure has occurred due to premature handover. In the case of premature handover failure, non-terrestrial network devices can increase the time threshold of conditional event T1 to reduce handover failures caused by premature handover.

[0122] The following is based on Figure 6 Examples of other embodiments of this disclosure will be described below.

[0123] Figure 6 This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment is performed by a network device and includes steps S610-S620.

[0124] In step S610, a handover failure message sent by the user equipment is received. The handover failure message includes the time information when the handover failure occurred and the start time of service of the target cell, or the difference between the time when the handover failure occurred and the start time of service of the target cell.

[0125] In step S620, the network configuration is adjusted based on the handover failure information.

[0126] In some embodiments, if the service start time of the target cell is greater than the failed handover time, it can be determined that a premature handover has occurred, leading to a handover failure. Alternatively, if the time information of the handover failure is less than the expected handover time, and the difference between the time of the handover failure and the service start time of the target cell meets a preset condition, it indicates that a premature handover has occurred, leading to a handover failure. Therefore, the network device can increase the time threshold of conditional event T1 to reduce handover failures caused by premature handover.

[0127] In some embodiments of this disclosure, the network device also receives third identification information of the candidate cell, service start time of the candidate cell, the difference between the time of handover failure and the service start time of the candidate cell, and conditional event indications configured by the network sent by the user equipment.

[0128] If the handover failure occurs after the candidate cell's service start time, it indicates that there are other cells besides the target cell that meet the handover criteria. These cells can be used for subsequent network optimization. Based on the identification information of the candidate cell, the network equipment can identify other cells that may meet the handover criteria when the user equipment experiences a handover failure.

[0129] The conditional event indicators configured in this network are trigger events, such as conditional event A3, conditional event A4, or conditional event A5. When configuring conditional handover event T1 for a user equipment (UE), the network often configures conditional events A3, A4, and A5 together. The UE will only initiate the signal measurement process when the conditions of conditional handover event T1 are met, and further determine whether to perform a handover based on the signal measurement results. Therefore, by sending the network-configured conditional event indicators to the network equipment, the UE can optimize the parameter settings of conditional events A3, A4, and A5 simultaneously while optimizing the parameter settings related to conditional handover event T1.

[0130] The third identification information is, for example, at least one of the third global cell identifier and the third tracking area list.

[0131] In other embodiments of this disclosure, the network device further receives fourth identification information of the cell selected by the user equipment when initiating RRC reconstruction. The network device determines whether premature handover has occurred by comparing the fourth identification information with the first identification information. The fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

[0132] For example, if a user equipment initiates an RRC reconstruction process due to a handover failure, and the selected cell is configured with condition event T1 and meets the leave condition, the cell identifier or tracking area list of the cell the user equipment is attempting to reconstruct via RRC is recorded. If the cell identifier or tracking area list of the reconstructed cell matches the cell identifier or tracking area list of the source cell, it indicates that an premature handover has occurred.

[0133] In some embodiments, the network device also receives the time elapsed from the user equipment (UE) from the occurrence of a handover failure to the UE entering the RRC connected state. The network device checks whether this time is less than a certain specific value. If the time is less than the specific value, it indicates that the UE handover failure was caused by unreasonable handover parameter settings; if the time is greater than the specific value, it indicates that the UE handover failure was caused by an overlay vulnerability.

[0134] In some embodiments, the network device further receives fifth identification information of a cell when the user equipment enters the RRC connected state, sent by the user equipment. The network device compares this fifth identification information with the first and second identification information to determine whether a premature handover or an erroneous handover has occurred, and then decides on an optimization strategy. The fifth identification information includes at least one of a fifth global cell identifier and a fifth tracking area list.

[0135] For example, if the fifth identification information is consistent with the first identification information, it indicates that a premature handover has occurred; if the fifth identification information is inconsistent with both the first and second identification information, it indicates that an incorrect handover has occurred.

[0136] In some embodiments, the network device further receives third indication information sent by the user equipment, the third indication information including indication information that the user equipment has available handover failure information; and receives request information sent by the network device, the request information being used to instruct the user equipment to send handover failure information. The network device can obtain non-terrestrial network handover failure information in a timely manner without wasting signaling resources, avoiding situations where the network blindly requests non-terrestrial network failure information when the user equipment does not have such handover failure information.

[0137] Below, with Figures 7 to 10 Taking this as an example, we introduce a scenario where time-based conditional handover failure in non-terrestrial networks is caused by premature handover.

[0138] Figure 7 This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment includes steps S710-S760.

[0139] In step S710, the user equipment receives an RRC reconstruction message sent by a non-terrestrial network device, which carries conditional events T1 and reconfigurationWithSync.

[0140] In step S720, the user equipment determines that the condition event is met and decides to execute the handover command. If the handover fails, step S730 is executed.

[0141] In step S730, the user equipment records the time of the handover failure, the cell identifier and / or tracking area list of the target cell of the failed handover, the cell identifier and / or tracking area list of the source cell, the cell identifier and / or tracking area list of the candidate target cells, the service stop time of the source cell, the service stop time of the target cell, the service stop time of the candidate target cells, the second triggering event configured by the network for the candidate cells, the failure type, the handover type, and the conditional event indication, etc.

[0142] In some embodiments, the time when the handover failure occurs may be the time when the user equipment executes an RRCReconfiguration message containing reconfigurationWithSync, or the time when the user equipment performs a conditional reconfiguration.

[0143] The time of the handover failure is UTC time; the time when the user equipment executes the RRCReconfiguration message containing reconfigurationWithSync is UTC time; the time when the user equipment performs conditional reconfiguration is UTC time; the service stop time is UTC time; the failure type is non-terrestrial network handover failure; the handover type is time-based conditional handover; and the condition event indicator is used to indicate the condition events configured together with the time-based condition events (e.g., condition events A3 / A4 / A5).

[0144] In step S740, the user equipment initiates an RRC reconstruction.

[0145] In step S750, the user equipment records the cell identifier and / or tracking area list of the selected cell.

[0146] If the cell selected by the user equipment is configured with condition event T1 and the leave condition is met, the user equipment records the cell identifier and / or the list of tracking areas for that cell.

[0147] In step S760, the user equipment sends a non-terrestrial network handover failure message to the non-terrestrial network device.

[0148] In this embodiment, after a time-based conditional handover fails, the user equipment successfully completes the RRC reconstruction scenario. The user equipment sends the recorded non-terrestrial network handover failure information to the non-terrestrial network device. The non-terrestrial network can obtain the necessary information of the time-based conditional handover failure scenario in a timely manner, analyze the reasons for the time-based conditional handover failure, and make targeted adjustments and optimizations, thereby improving the robustness of time-based conditional handover in the non-terrestrial network.

[0149] Figure 8 This is a flowchart illustrating some other embodiments of the information transmission method of this disclosure. This embodiment includes steps S810-S860.

[0150] In step S810, the user equipment receives an RRC reconstruction message sent by a non-terrestrial network device, which carries conditional events T1 and reconfigurationWithSync.

[0151] In step S820, the user equipment determines that the condition event is met and decides to execute the handover command. If the handover fails, step S830 is executed.

[0152] In step S830, the user equipment records the time of the handover failure, the cell identifier and / or tracking area list of the target cell of the failed handover, the cell identifier and / or tracking area list of the source cell, the cell identifier and / or tracking area list of the candidate target cells, the service stop time of the source cell, the service stop time of the target cell, the service stop time of the candidate target cells, the second triggering event configured by the network for the candidate cells, the failure type, the handover type, and the conditional event indication, etc.

[0153] If RRC reconstruction fails, proceed to step S840.

[0154] In step S840, the user equipment records the cell identifier and / or tracking area list of the selected cell.

[0155] If the cell selected by the user equipment is configured with condition event T1 and the leave condition is met, the user equipment records the cell identifier and / or the list of tracking areas for that cell.

[0156] If the RRC is successfully established, proceed to step S850.

[0157] In step S850, the user equipment records the time elapsed since the handover failure, as well as the cell representation and / or tracking area list of the current cell.

[0158] In step S860, the user equipment sends a non-terrestrial network handover failure message to the non-terrestrial network device.

[0159] In this embodiment, if the user equipment fails to rebuild the RRC after a time-based conditional handover failure and re-initiates the RRC request, the user equipment will send the non-terrestrial network handover failure information to the non-terrestrial network device.

[0160] Figure 9 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein. This embodiment includes steps S910-S980.

[0161] In step S910, the user equipment receives an RRC reconstruction message sent by a non-terrestrial network device, which carries the condition event T1 and the reconfigurationWithSync.

[0162] In step S920, the user equipment determines that the condition event is met and decides to execute the handover command. If the handover fails, step S930 is executed.

[0163] In step S930, the user equipment records the difference between the time of the handover failure and the conditional event time threshold, the cell identifier and / or tracking area list of the target cell, the cell identifier and / or tracking area list of the source cell, the cell identifier and / or tracking area list of the candidate target cells, the service stop time of the source cell, the service stop time of the target cell, the service stop time of the candidate target cells, the second triggering event configured by the network for the candidate cells, the failure type, the handover type, and other non-terrestrial network connection failure information.

[0164] The user equipment can also record non-terrestrial network connection failure information such as the difference between the time when the terminal executes the RRCReconfiguration message containing reconfigurationWithSync and the conditional event time threshold, or the difference between the time when the terminal executes conditional reconfiguration and the conditional event time threshold, the difference between the time when the user equipment fails to handover and the source cell service stop time, the difference between the time when the user equipment fails to handover and the target cell service stop time, and the difference between the time when the user equipment fails to handover and the candidate target cell service stop time.

[0165] In step S940, the user equipment initiates an RRC reconstruction.

[0166] In step S950, the user equipment records the cell identifier and / or tracking area list of the selected cell.

[0167] If the cell selected by the user equipment is configured with condition event T1 and the leave condition is met, the user equipment records the cell identifier and / or the list of tracking areas for that cell.

[0168] In step S960, the user equipment sends an indication message to the non-terrestrial network device to indicate that there is a failed handover message for an available non-terrestrial network.

[0169] In step S970, the non-terrestrial network device sends a request message to the user equipment, requesting the terminal to send a non-terrestrial network connection failure message.

[0170] In step S980, the user equipment sends a non-terrestrial network connection failure message to the non-terrestrial network device.

[0171] Figure 10 This is a flowchart illustrating some other embodiments of the information transmission method disclosed herein. This embodiment includes steps S1010-S1080.

[0172] In step S1010, the user equipment receives an RRC reconstruction message sent by a non-terrestrial network device, which carries conditional events T1 and reconfigurationWithSync.

[0173] In step S1020, the user equipment determines that the condition event is met and decides to execute the handover command. If the handover fails, step S1030 is executed.

[0174] In step S1030, the user equipment records the difference between the time of the handover failure and the conditional event time threshold, the cell identifier and / or tracking area list of the target cell, the cell identifier and / or tracking area list of the source cell, the cell identifier and / or tracking area list of the candidate target cell, the service stop time of the source cell, the service stop time of the target cell, the service stop time of the candidate target cell, the second triggering event configured by the network for the candidate cell, the failure type, the handover type, and other non-terrestrial network connection failure information.

[0175] If RRC reconstruction fails, proceed to step S840.

[0176] In step S1040, the user equipment records the cell identifier and / or tracking area list of the selected cell.

[0177] If the cell selected by the user equipment is configured with condition event T1 and the leave condition is met, the user equipment records the cell identifier and / or the list of tracking areas for that cell.

[0178] If the RRC is successfully established, proceed to step S1050.

[0179] In step S1050, the user equipment records the time elapsed since the last conditional reconfiguration, the cell identifier of the current cell, and / or the list of tracking areas.

[0180] In step S1060, the user equipment sends an indication message to the non-terrestrial network device to indicate that there is a failed handover message for an available non-terrestrial network.

[0181] In step S1070, the non-terrestrial network device sends a request message to the user equipment, requesting the terminal to send a non-terrestrial network connection failure message.

[0182] In step S1080, the user equipment sends a non-terrestrial network connection failure message to the non-terrestrial network device.

[0183] Figure 11 This is a schematic diagram of the structure of some embodiments of the user equipment disclosed herein, which includes a recording module 1110 and a first transceiver module 1120.

[0184] The recording module 1110 is configured to record handover failure information, which includes the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell.

[0185] The first identification information includes at least one of a first global cell identifier and a first tracking area list. The second identification information includes at least one of a second global cell identifier and a second tracking area list.

[0186] In some embodiments, the handover failure information may further include: the service downtime of the source cell, or the difference between the time of the handover failure and the service downtime of the source cell.

[0187] The handover failure information also includes: the service start time of the target cell, or the difference between the time of the handover failure and the service start time of the target cell.

[0188] The handover failure information also includes at least one of the following: the third identification information of the candidate cell, the service start time of the candidate cell, the difference between the time of the handover failure and the service start time of the candidate cell, and a conditional event indication in the network configuration. The third identification information includes at least one of the third global cell identifier and the third tracking area list.

[0189] The handover failure information also includes the fourth identification information of the cell selected when the user equipment initiated the RRC reconstruction. The fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

[0190] In the event of a failure to rebuild the user equipment's RRC, the handover failure information also includes the time elapsed from the handover failure to the user equipment entering the RRC connected state.

[0191] The handover failure information also includes the fifth identification information of the cell when the user equipment enters RRC connected mode. The fifth identification information includes at least one of the fifth global cell identifier and the fifth tracking area list.

[0192] The handover failure information also includes a first indication, which indicates that the source cell is a non-terrestrial network cell.

[0193] The handover failure information also includes a second indication, which indicates that the target cell is a non-terrestrial network cell.

[0194] The handover failure information also includes the failure type, where the failure type is non-terrestrial network handover failure.

[0195] The failover information also includes the failover type, where the failover type is a time-based conditional failover.

[0196] In some embodiments, the time information at the time of a handover failure includes at least one of the following: the time when the user equipment executes an RRC reconfiguration message containing synchronous reconfiguration; the difference between the time when the user equipment executes an RRC reconfiguration message containing synchronous reconfiguration and a time threshold in the conditional events of the network configuration; the time when the user equipment executes a conditional reconfiguration; the difference between the time when the user equipment executes a conditional reconfiguration and a time threshold in the conditional events of the network configuration; the difference between the time at which the handover failure occurs and a time threshold in the conditional events of the network configuration; and the UTC time measured by the user equipment at the time of the handover failure.

[0197] The first transceiver module 1120 is configured to send handover failure information to the network device.

[0198] In some embodiments, the first transceiver module is further configured to send third indication information to the network device, the third indication information including indication information that the user equipment has available handover failure information; and to receive request information sent by the network device, the request information being used to instruct the user equipment to send handover failure information.

[0199] Figure 12 This is a schematic diagram of the structure of some embodiments of the network device disclosed herein, which includes a second transceiver module 1210 and an adjustment module 1220.

[0200] The second transceiver module 1210 is configured to receive handover failure information sent by the user equipment, wherein the handover failure information includes the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell.

[0201] The first identification information includes at least one of a first global cell identifier and a first tracking area list. The second identification information includes at least one of a second global cell identifier and a second tracking area list.

[0202] In some embodiments, the handover failure information may further include: the service downtime of the source cell, or the difference between the time of the handover failure and the service downtime of the source cell.

[0203] The handover failure information also includes: the service start time of the target cell, or the difference between the time of the handover failure and the service start time of the target cell.

[0204] The handover failure information also includes at least one of the following: the third identification information of the candidate cell, the service start time of the candidate cell, the difference between the time of the handover failure and the service start time of the candidate cell, and a conditional event indication in the network configuration. The third identification information includes at least one of the third global cell identifier and the third tracking area list.

[0205] The handover failure information also includes the fourth identification information of the cell selected when the user equipment initiated the RRC reconstruction. The fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

[0206] In the event of a failure to rebuild the user equipment's RRC, the handover failure information also includes the time elapsed from the handover failure to the user equipment entering the RRC connected state.

[0207] The handover failure information also includes the fifth identification information of the cell when the user equipment enters RRC connected mode. The fifth identification information includes at least one of the fifth global cell identifier and the fifth tracking area list.

[0208] The handover failure information also includes a first indication, which indicates that the source cell is a non-terrestrial network cell.

[0209] The handover failure information also includes a second indication, which indicates that the target cell is a non-terrestrial network cell.

[0210] The handover failure information also includes the failure type, where the failure type is non-terrestrial network handover failure.

[0211] The failover information also includes the failover type, where the failover type is a time-based conditional failover.

[0212] In some embodiments, the time information at the time of a handover failure includes at least one of the following: the time when the user equipment executes an RRC reconfiguration message containing synchronous reconfiguration; the difference between the time when the user equipment executes an RRC reconfiguration message containing synchronous reconfiguration and a time threshold in the conditional events of the network configuration; the time when the user equipment executes a conditional reconfiguration; the difference between the time when the user equipment executes a conditional reconfiguration and a time threshold in the conditional events of the network configuration; the difference between the time at which the handover failure occurs and a time threshold in the conditional events of the network configuration; and the UTC time measured by the user equipment at the time of the handover failure.

[0213] The adjustment module 1220 is configured to adjust the network configuration based on handover failure information.

[0214] For example, to address premature handover, non-terrestrial network devices can increase the time threshold of conditional event T1, thereby reducing handover failures caused by premature handover. If handover failure is caused by a coverage vulnerability, non-terrestrial network devices can adjust their transmission power to compensate for the coverage vulnerability and reduce handover failures.

[0215] Figure 13 This is a schematic diagram illustrating the structure of some embodiments of the information transmission device disclosed herein. The information transmission device 1300 includes a memory 1310 and a processor 1320. The memory 1310 can be a disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the above embodiments. The processor 1320 is coupled to the memory 1310 and can be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 1320 is used to execute the instructions stored in the memory.

[0216] In some embodiments, the processor 1320 is coupled to the memory 1310 via a BUS bus 1330. The information transmission device 1300 can also be connected to an external storage device 1350 via a storage interface 1340 to access external data, and can also be connected to a network or another computer system (not shown) via a network interface 1360. Further details are omitted here.

[0217] In this embodiment, storing data instructions in a memory and then processing those instructions with a processor can improve the robustness of time-based conditional handover in non-terrestrial networks.

[0218] In other embodiments, a computer-readable storage medium stores computer program instructions that, when executed by a processor, implement the steps of the methods described above. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0219] In some embodiments, a computer program product is protected, comprising a computer program or instructions that, when executed by a processor, implement the methods described above. The computer program product includes a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device, or installed from ROM. When the computer program is executed by a CPU, it performs the functions defined in the methods of embodiments of this disclosure.

[0220] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0221] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0222] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0223] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0224] The methods and apparatus of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0225] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. An information transmission method, comprising: Record handover failure information, wherein the handover failure information includes the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell; and Send the handover failure information to the network device.

2. The information transmission method according to claim 1, wherein, The handover failure information also includes: the service stop time of the source cell, or the difference between the time when the handover failure occurred and the service stop time of the source cell.

3. The information transmission method according to claim 1 or 2, wherein, The handover failure information also includes: the service start time of the target cell, or the difference between the time when the handover failure occurred and the service start time of the target cell.

4. The information transmission method according to claim 1, wherein, The handover failure information also includes at least one of the following: the third identifier information of the candidate cell, the service start time of the candidate cell, the difference between the time when the handover failure occurred and the service start time of the candidate cell, and the conditional event indication of the network configuration.

5. The information transmission method according to claim 1, wherein, The handover failure information also includes the fourth identifier information of the cell selected when the user equipment initiates Radio Resource Control (RRC) reconstruction.

6. The information transmission method according to claim 5, wherein, In the event that the user equipment RRC reconstruction fails, the handover failure information also includes the time elapsed from the handover failure to the user equipment entering the RRC connected state.

7. The information transmission method according to claim 6, wherein, The handover failure information also includes the fifth identifier information of the cell when the user equipment enters the RRC connected state.

8. The information transmission method according to claim 1, wherein, The timing information when a handover failure occurs includes at least one of the following: The time when the user equipment executes the Radio Resource Control (RRC) reconfiguration message that includes synchronization reconfiguration; The difference between the time when the user equipment executes the RRC reconfiguration message containing synchronous reconfiguration and the time threshold in the conditional event of network configuration; The time it takes for the user equipment to perform a conditional reconfiguration; The difference between the time it takes for the user equipment to perform a conditional reconfiguration and the time threshold in the conditional event of the network configuration; The difference between the time when the handover failure occurs and the time threshold in the conditional events configured in the network configuration; Coordinated Universal Time (UTC) measured by the user equipment when a handover failure occurs.

9. The information transmission method according to claim 1, wherein, The handover failure information also includes first indication information, which indicates that the source cell is a non-terrestrial network cell.

10. The information transmission method according to claim 1, wherein, The handover failure information also includes second indication information, which indicates that the target cell is a non-terrestrial network cell.

11. The information transmission method according to claim 1, wherein, The handover failure information also includes a failure type, wherein the failure type is a non-terrestrial network handover failure.

12. The information transmission method according to claim 1, wherein, The switching failure information also includes the switching type, wherein the switching type is a time-based conditional switching.

13. The information transmission method according to claim 1, wherein, The first identification information includes at least one of the first global cell identifier and the first tracking area list; The second identification information includes at least one of the second global cell identifier and the second tracking area list.

14. The information transmission method according to claim 4, wherein, The third identification information includes at least one of the third global cell identifier and the third tracking area list.

15. The information transmission method according to claim 5, wherein, The fourth identification information includes at least one of the fourth global cell identifier and the fourth tracking area list.

16. The information transmission method according to claim 7, wherein, The fifth identification information includes at least one of the fifth global cell identifier and the fifth tracking area list.

17. The information transmission method according to any one of claims 1 to 2 and 4 to 16, further comprising: Send a third indication message to the network device, the third indication message including an indication message that the user equipment has available handover failure information; as well as The system receives a request message sent by the network device, which instructs the user equipment to send the handover failure message.

18. An information transmission method, comprising: The system receives handover failure information sent by a user equipment, wherein the handover failure information includes time information of the handover failure, a first identifier of the source cell, and a second identifier of the target cell; and The network configuration is adjusted based on the handover failure information.

19. The information transmission method according to claim 18, wherein, The handover failure information also includes the service downtime of the source cell, or the difference between the time of the handover failure and the service downtime of the source cell.

20. The information transmission method according to claim 18 or 19, wherein, The handover failure information also includes the service start time of the target cell, or the difference between the time when the handover failure occurred and the service start time of the target cell.

21. The information transmission method according to claim 18 or 19, wherein, The handover failure information also includes at least one of the following: the third identifier information of the candidate cell, the service start time of the candidate cell, the difference between the time when the handover failure occurred and the service start time of the candidate cell, and the conditional event indication of the network configuration.

22. The information transmission method according to claim 18 or 19, wherein, The handover failure information also includes the fourth identifier information of the cell selected by the user equipment when initiating Radio Resource Control (RRC) reconstruction.

23. The information transmission method according to claim 22, wherein, The handover failure information also includes the time elapsed from the handover failure to the user equipment entering the RRC connection state.

24. The information transmission method according to claim 23, wherein, The handover failure information also includes the fifth identifier information of the cell in which the user equipment entered the RRC connected state.

25. A user equipment, comprising: The recording module is configured to record handover failure information, wherein the handover failure information includes the time information when the handover failure occurred, the first identifier information of the source cell, and the second identifier information of the target cell; and The first transceiver module is configured to send the handover failure information to the network device.

26. A network device, comprising: The second transceiver module is configured to receive handover failure information sent by the user equipment, wherein the handover failure information includes time information of the handover failure, first identifier information of the source cell, and second identifier information of the target cell; and The adjustment module is configured to adjust the network configuration based on the handover failure information.

27. An information transmission device, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the information transfer method as described in any one of claims 1 to 24 based on instructions stored in the memory.

28. A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the information transmission method as described in any one of claims 1 to 24.

29. A computer program product comprising a computer program or instructions that, when executed by a processor, implement the information transmission method according to any one of claims 1 to 24.

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