Information sending method, information receiving method, terminal, and network side device

Abstract

The present application relates to the technical field of communications, and discloses an information sending method, an information receiving method, a terminal, and a network side device. The information sending method in embodiments of the present application comprises: when a first condition related to a wireless link is satisfied, a terminal records first information related to a non-terrestrial network (NTN); and the terminal sends the first information to a network side device. The information receiving method in the embodiments of the present application comprises: a network side device receives first information sent by a terminal, wherein the first information is related to an NTN, and the first information is recorded by the terminal.

Description

Information sending and receiving method, terminal and network side equipment

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on April 3, 2024, with application number 202410403479.7 and invention name “Information sending and receiving method, terminal and network side equipment”. The entire contents of the application are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to an information sending and receiving method, a terminal and a network side device. Background Art

[0004] Non-terrestrial networks (NTNs) typically refer to networks or network segments that utilize platforms such as satellites or unmanned aircraft systems (UASs) for transmission. These networks offer a wider coverage area than terrestrial communication systems. Currently, terminals can communicate over NTNs in typical application scenarios, such as where ground base stations are unavailable, in low-density wilderness areas, in emergency situations like disasters, and when ground base stations are damaged.

[0005] In an NTN, taking a satellite network as an example, the link between the satellite and the terminal is the service link, and the link between the satellite and the ground gateway is the feeder link. Because the satellite is constantly moving, the corresponding cells in the network also move, which can lead to radio link failures or cell handover failures or successes. In these situations, to ensure optimal terminal communication, network-side equipment needs to optimize terminal mobility management configuration based on radio link information. Summary of the Invention

[0006] The embodiments of the present application provide a method for sending and receiving information, a terminal, and a network-side device, which can solve the problem of how the network-side device optimizes the terminal mobility management-related configuration based on the relevant information of the wireless link under the NTN.

[0007] In a first aspect, a method for sending information is provided, which is executed by a terminal. The method includes: when a first condition related to a wireless link is met, the terminal records first information related to a non-terrestrial network NTN; and the terminal sends the first information to a network side device.

[0008] In a second aspect, an information receiving method is provided, which is executed by a network side device. The method includes: the network side device receives first information sent by a terminal, the first information is related to the NTN, and the first information is recorded by the terminal.

[0009] In a third aspect, an information sending device is provided, including: a recording module for recording first information related to a non-terrestrial network NTN when a first condition related to a wireless link is met; and the sending module for sending the first information to a network side device.

[0010] In a fourth aspect, an information receiving device is provided, including: a receiving module, configured to receive first information sent by a terminal, wherein the first information is related to the NTN and is recorded by the terminal.

[0011] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0012] In the sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to record first information related to the non-terrestrial network NTN when a first condition related to the wireless link is met, and the communication interface is used to send the first information to the network side device.

[0013] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0014] In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to receive first information sent by a terminal, the first information is related to the NTN, and the first information is recorded by the terminal.

[0015] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0016] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0017] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0018] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0019] In the embodiment of the present application, since the terminal can record the first information related to the NTN and send the first information to the network-side device when the first condition related to the wireless link is met, the network-side device can promptly obtain the wireless link status under the NTN based on the first information, thereby optimizing the relevant configurations of the terminal's mobility management, improving the wireless link communication of the terminal under the NTN, and enhancing the stability of the connection between the terminal and the network in the NTN network. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

[0021] FIG2 is a schematic diagram of an NTN communication system according to an embodiment of the present application;

[0022] FIG3 is a schematic diagram of an NTN communication system according to an embodiment of the present application;

[0023] FIG4 is a schematic flowchart of a method for sending information according to an embodiment of the present application;

[0024] FIG5 is a schematic flowchart of an information receiving method according to an embodiment of the present application;

[0025] FIG6 is a schematic structural diagram of an information sending device according to an embodiment of the present application;

[0026] FIG7 is a schematic structural diagram of an information receiving device according to an embodiment of the present application;

[0027] FIG8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0028] FIG9 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0029] FIG10 is a schematic structural diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0031] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0032] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0033] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0034] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0035] The technical solutions provided in the embodiments of the present application can be applied to NTN communication systems. NTN communication systems include two types: NTN communication systems based on transparent payloads and NTN communication systems based on regenerative payloads. In the NTN system based on transparent payloads, terminals, base stations, and core network equipment are all deployed on the ground, and communication data between terminals and network-side equipment is relayed via satellites in the air, as shown in Figure 2. In the NTN communication system shown in Figure 2, the satellite is only used to forward data between the base station and the terminal and does not decode or process this data. For the NTN communication system based on regenerative payloads, the satellite has some or all of the base station functions and can decode and process uplink or downlink data, as shown in Figure 3. In Figures 2 and 3, the link between the satellite and the terminal is a service link, and the link between the satellite and the ground gateway is a feeder link.

[0036] The following, in conjunction with the accompanying drawings, describes in detail the information sending and receiving methods, terminals, and network-side devices provided in the embodiments of the present application through some embodiments and their application scenarios.

[0037] As shown in FIG4 , an embodiment of the present application provides an information sending method 400 , which can be executed by a terminal. In other words, the information sending method can be executed by software or hardware installed in the terminal. The information sending method includes the following steps.

[0038] S402: When a first condition related to a wireless link is met, the terminal records first information related to a non-terrestrial network NTN.

[0039] In a scenario where communication is performed based on an NTN, the terminal may determine whether a first condition related to a wireless link is satisfied. If it is determined that the first condition related to the wireless link is satisfied, the terminal may record first information related to the NTN.

[0040] The first condition is a condition related to the wireless link under the NTN. Optionally, in some embodiments, the first condition may include at least one of the following:

[0041] The terminal detects that the wireless link fails;

[0042] Cell handover failed;

[0043] The cell switching was successful.

[0044] That is, the terminal may record the first information related to the NTN when a radio link failure (RLF) is detected, or record the first information related to the NTN when a cell handover failure (Handover Failure) is detected, or record the first information related to the NTN when a cell handover is detected to be successful. For the terminal, at least one of the following may be satisfied:

[0045] The service cell of the terminal is the NTN cell;

[0046] The target cell for the terminal to perform cell handover is the NTN cell.

[0047] Optionally, if the serving cell of the terminal is an NTN cell, then upon detecting a radio link failure, the terminal records first information related to the NTN. If the target cell for a cell handover performed by the terminal is an NTN cell, then upon failing the cell handover, the terminal records first information related to the NTN, or upon successful cell handover, the terminal records first information related to the NTN. If the serving cell of the terminal is an NTN cell and the target cell for a cell handover performed by the terminal is an NTN cell, then upon detecting a radio link failure, the terminal records first information related to the NTN, or upon failing the cell handover, the terminal records first information related to the NTN, or upon successful cell handover, the terminal records first information related to the NTN. The first information recorded upon detecting a radio link failure may be information related to the radio link failure, the first information recorded upon failing the cell handover may be information related to the cell handover failure, and the first information recorded upon successful cell handover may be information related to successful cell handover.

[0048] Optionally, in some implementations, if the first information is information recorded by the terminal when a wireless link failure is detected, the first information may include at least one of the following (1) to (10):

[0049] (1) A handover execution condition corresponding to a conditional handover candidate cell, where the handover execution condition is related to at least one of a first condition event and a second condition event.

[0050] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0051] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0052] Optionally, the switching execution condition may also be expressed as a location-based execution condition (such as CondEvent D1 or CondEvent D2) or a time-based execution condition (such as CondEvent T1).

[0053] (2) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0054] Optionally, in some embodiments, the first reference position may satisfy any one of the following (2a) to (2h):

[0055] (2a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0056] The fourth conditional event is a location-related conditional event, such as CondEvent D1. CondEvent D1 is a location-based CHO triggering event introduced in NTN. CondEvent D1 indicates the reference location referenceLocation1 of the terminal's serving cell. When the third cell is associated with CondEvent D1, the first reference location may be referenceLocation1 indicated in CondEvent D1.

[0057] (2b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0058] Compared to (2a), (2b) adds an additional condition, namely, it specifies that the last handover type performed by the terminal is conditional handover. When the third cell is associated with the fourth condition event and the last handover type performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event. For example, when the third cell is associated with CondEvent D1 and the last handover type performed by the terminal is conditional handover, the first reference location may be referenceLocation1 indicated in CondEvent D1.

[0059] (2c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0060] The first event is a location-related event, such as Event D1. Event D1 indicates a reference location referenceLocation1 of a serving cell of the terminal. If the terminal is configured with Event D1, the first reference location may be referenceLocation1 indicated in Event D1.

[0061] (2d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0062] (2d) adds an additional condition compared to (2c), namely, limiting the connection failure type of the terminal to radio link failure. When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the first reference location is the reference location of the serving cell indicated in the first event. For example, when the terminal is configured with Event D1 and the connection failure type of the terminal is radio link failure, the first reference location may be referenceLocation1 indicated in Event D1.

[0063] (2e) When the third cell is associated with the fifth condition event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0064] The fifth conditional event is a conditional event related to location, such as CondEvent D2. CondEvent D2 is a location-based CHO trigger event introduced in NTN. When the third cell is associated with CondEvent D2, the terminal determines the first reference position based on the reference position of the serving cell (movingReferenceLocation, the reference position of the serving cell provided by the earth-moving system at a time reference (epochTime)), the ephemeris information of the serving cell and the epoch time (epochTime), wherein the terminal can obtain the reference position of the serving cell, the ephemeris information and the epoch time (epochTime) of the serving cell through system information, for example, for the LTE system, it is obtained through SIB31, and for the NR system, it is obtained through SIB19.

[0065] (2f) When the third cell is associated with the fifth condition event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0066] (2f) adds an additional condition compared to (2e), namely, limiting the last handover type executed by the terminal to conditional handover. When the third cell is associated with the fifth condition event and the last handover type executed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time. For example, when the third cell is associated with CondEvent D2 and the last handover type executed by the terminal is conditional handover, the terminal can determine the first reference position based on the reference position of the serving cell (movingReferenceLocation, the reference position of the serving cell provided by the earth-moving system at a time reference (epochTime)), the ephemeris information of the serving cell, and the epoch time (epochTime).

[0067] (2g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0068] The second event is a location-related event, such as Event D2. When the terminal is configured with Event D2, the terminal can determine the first reference position based on the reference position of the serving cell (movingReferenceLocation, the reference position of the serving cell provided by the earth-moving system at a time reference (epochTime)), the ephemeris information of the serving cell, and the epoch time (epochTime). For NR, the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time can be obtained through SIB19. For LTE, the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time can be obtained through SIB31.

[0069] (2h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0070] (2h) adds an additional condition compared to (2g), which is to limit the connection failure type of the terminal to radio link failure. When the terminal is configured with the second event and the connection failure type of the terminal is radio link failure, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time. For example, when the terminal is configured with Event D2 and the connection failure type of the terminal is radio link failure, the terminal can determine the first reference position based on the reference position of the serving cell (movingReferenceLocation, the reference position of the serving cell provided by the earth-moving system at a time reference (epochTime)), the ephemeris information of the serving cell, and the epoch time. For NR, the ephemeris information and epoch time of the serving cell can be obtained through SIB19. For LTE, the ephemeris information and epoch time of the serving cell can be obtained through SIB31.

[0071] (3) A distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional switching. Optionally, in some embodiments, the second reference location may satisfy any one of the following (3a) to (3d):

[0072] (3a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0073] The fourth conditional event is a location-related conditional event, such as CondEvent D1. CondEvent D1 is a location-based CHO triggering event introduced in NTN. CondEvent D1 indicates the reference location referenceLocation2 of the terminal's candidate cell. When the third cell is associated with CondEvent D1, the second reference location may be referenceLocation2 indicated in CondEvent D1.

[0074] (3b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0075] Compared to (3a), (3b) adds an additional condition, namely, it specifies that the last handover type performed by the terminal is conditional handover. When the third cell is associated with the fourth conditional event and the last handover type performed by the terminal is conditional handover, the second reference location is the reference location of the candidate cell indicated in the fourth conditional event. For example, when the third cell is associated with CondEvent D1 and the last handover type performed by the terminal is conditional handover, the second reference location may be referenceLocation2 indicated in CondEvent D1.

[0076] (3c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0077] The fifth conditional event is a conditional event related to location, such as CondEvent D2. CondEvent D2 is a location-based CHO trigger event introduced in NTN. CondEvent D2 indicates the reference location referenceLocation2 of the terminal's candidate cell. When the third cell is associated with CondEvent D2, the terminal determines the second reference location based on the ephemeris information of the candidate cell switched conditionally, the referenceLocation2 indicated in CondEvent D2, and the corresponding epoch time. Among them, the epoch time and ephemeris information corresponding to referenceLocation2 can be obtained through the measurement target in the dedicated signaling (for example, for NR, it is MeasObjectNR).

[0078] (3d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0079] (3d) adds an additional condition compared to (3c), which is to limit the last handover type executed by the terminal to conditional handover. When the third cell is associated with the fifth conditional event and the last handover type executed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time. For example, when the third cell is associated with CondEvent D2 and the last handover type executed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, referenceLocation2 indicated in CondEvent D2, and the corresponding epoch time. The epoch time and ephemeris information corresponding to referenceLocation2 can be obtained through the measurement target in the dedicated signaling (for example, for NR, it is MeasObjectNR).

[0080] (4) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0081] Optionally, in some embodiments, the third reference position may satisfy any one of the following (4a) to (4d):

[0082] (4a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0083] The first event is a location-related event, such as Event D1, which indicates a reference location referenceLocation2 of a neighboring cell of the terminal. If the terminal is configured with Event D1, the third reference location may be referenceLocation2 indicated in Event D1.

[0084] (4b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0085] Compared to (4a), (4b) adds an additional condition, namely, limiting the connection failure type of the terminal to radio link failure. When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event. For example, when the terminal is configured with Event D1 and the connection failure type of the terminal is radio link failure, the third reference location may be referenceLocation2 indicated in Event D1.

[0086] (4c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0087] The second event is a location-related event, such as Event D2. Event D2 indicates the reference location referenceLocation2 of the terminal's neighboring cell. When the terminal is configured with Event D2, the terminal determines the third reference location based on the ephemeris information of the neighboring cell, the referenceLocation2 indicated in Event D2, and the corresponding epoch time. The epoch time and ephemeris information corresponding to referenceLocation2 are obtained through the measurement target in the dedicated signaling (for example, for NR, MeasObjectNR).

[0088] (4d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0089] (4d) adds an additional condition compared to (4c), which is to limit the connection failure type of the terminal to radio link failure. When the terminal is configured with the second event and the connection failure type of the terminal is radio link failure, the terminal determines the third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time. For example, when the terminal is configured with Event D2 and the connection failure type of the terminal is radio link failure, the terminal determines the third reference position based on the ephemeris information of the neighboring cell, referenceLocation2 indicated in Event D2, and the corresponding epoch time. The epoch time and ephemeris information corresponding to referenceLocation2 are obtained through the measurement target in the dedicated signaling (for example, for NR, it is MeasObjectNR).

[0090] (5) First time information, the first time information is used to indicate at least one of the time when the switching configuration is received, the time when the conditional switching is performed, the time when the radio link fails, the time when the radio resource control (RRC) connection reestablishment is performed, and the time when the RRC connection reestablishment is completed.

[0091] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, and the like.

[0092] Optionally, the first time information may be an absolute time, for example, Coordinated Universal Time (UTC).

[0093] (6) First indication information, the first indication information is used to indicate whether the first cell satisfies the leaving condition of the third condition event or does not satisfy the leaving condition of the third condition event when the first cell is associated with the third condition event, and the first cell is the cell selected by the terminal during the RRC connection reestablishment process.

[0094] The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0095] (7) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell where a radio link failure occurs, a cell where an RRC connection is reestablished, a target cell for handover, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional handover. The cell identifier includes a Tracking Area Code list (TAC list), where the Tracking Area Code list includes multiple Tracking Area Codes.

[0096] Optionally, the cell identifier may also include a Public Land Mobile Network (PLMN) ID and a cell ID.

[0097] (8) Second time information, where the second time information is used to indicate at least one of a time for performing satellite switch with resynchronization and a time for a wireless link failure.

[0098] Optionally, in some implementations, the time for performing satellite switching and resynchronization may satisfy any of the following:

[0099] If the terminal performs satellite handover and resynchronization earlier than the time when the radio link failure occurs, the time for performing satellite handover and resynchronization is the time when the terminal actually performs satellite handover and resynchronization; for example, it can be the t-Service provided by the network, or the time between t-ServiceStart and t-Service;

[0100] In the case that the time when the terminal performs satellite handover and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite handover and resynchronization is the time when the terminal can perform satellite handover and resynchronization.

[0101] Optionally, the second time information may be an absolute time, for example, UTC.

[0102] (9) Third time information, the third time information is used to indicate the time difference between the time when the satellite switching and resynchronization is performed and the time when the wireless link fails, and the time when the satellite switching and resynchronization is performed is before or after the time when the wireless link fails.

[0103] Optionally, in some implementations, the time for performing satellite switching and resynchronization may satisfy any of the following:

[0104] If the terminal performs satellite handover and resynchronization earlier than the time when the radio link failure occurs, the time for performing satellite handover and resynchronization is the time when the terminal actually performs satellite handover and resynchronization; for example, it can be the t-Service provided by the network, or the time between t-ServiceStart and t-Service;

[0105] In the case that the time when the terminal performs satellite handover and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite handover and resynchronization is the time when the terminal can perform satellite handover and resynchronization.

[0106] Optionally, the third time information may be an absolute time, for example, UTC.

[0107] (10) Second indication information, the second indication information is used to indicate at least one of the following:

[0108] The configured grants (CGs) for random access channel-less (RACH-less) handover configured by the network do not meet the synchronization signal block (SSB) measurement threshold;

[0109] The terminal is configured to perform RACH-less handover and the terminal performs RACH during the handover process.

[0110] The handover process can be understood as T304 running. T304 is a timer started when the terminal performs a handover. When T304 runs, the terminal performs the handover. If the terminal completes the handover during T304 (the handover does not time out), the handover is successful. If the terminal still does not complete the handover after T304 (the handover times out), the handover fails.

[0111] In the information in items (1) to (10) above:

[0112] Items (2) and (3) of information are record information related to location-based conditional switching (Location-based CHO). In some embodiments, when the terminal supports radio link failure reporting (RLF report) and supports location-based conditional switching, upon detecting a radio link failure, the terminal records at least one of the above-mentioned items (2) and (3), that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the second reference location.

[0113] Items (2) and (4) of information are record information related to a location-based measurement report. In some embodiments, when the terminal supports wireless link failure reporting and supports location-based measurement reporting, upon detecting a wireless link failure, the terminal records at least one of the above-mentioned items (2) and (4), that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the third reference location.

[0114] Items (5) and (6) of information are record information related to time-based conditional switching (Time-based CHO). In some embodiments, when the terminal supports wireless link failure reporting and supports time-based conditional switching, the terminal records at least one of the above-mentioned items (5) and (6), that is, records at least one of the first time information and the first indication information, when detecting a wireless link failure.

[0115] Item (7) of the information is record information related to the NTN cell. In some implementations, when the terminal supports radio link failure reporting and supports NTN, the terminal records the information in item (7) above, i.e., records the cell identifier of the second cell, where the cell identifier includes a TAC list, when detecting a radio link failure.

[0116] Items (8) and (9) of information are record information related to satellite switch with resynchronization. In some embodiments, when the terminal supports wireless link failure reporting and supports Satellite switch with resynchronization, upon detecting a wireless link failure, the terminal records at least one of the above-mentioned items (8) and (9), that is, records at least one of the second time information and the third time information.

[0117] Item (10) of the information is RACH-less related record information. In some implementations, when the terminal supports radio link failure reporting and supports RACH-less switching under NTN, the terminal records the above-mentioned item (10), i.e., records the third indication information, when detecting a radio link failure.

[0118] Optionally, in some implementations, if the first information is information recorded by the terminal when a cell handover fails, the first information may include at least one of the following (11) to (21):

[0119] (11) A handover execution condition corresponding to the conditional handover candidate cell, where the handover execution condition is related to at least one of the first condition event and the second condition event.

[0120] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0121] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0122] Optionally, the switching execution condition may also be expressed as a location-based execution condition (such as CondEvent D1 or CondEvent D2) or a time-based execution condition (such as CondEvent T1).

[0123] (12) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0124] Alternatively, in some embodiments, the first reference position may satisfy any one of the following (12a) to (12h):

[0125] (12a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0126] (12b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0127] (12c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0128] (12d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0129] (12e) When the third cell is associated with the fifth condition event, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0130] (12f) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0131] (12g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0132] (12h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0133] The explanations of (12a) to (12h) above can be found in the explanations of the corresponding contents in (2a) to (2h) above, and will not be described in detail here.

[0134] (13) The distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional switching.

[0135] Alternatively, in some embodiments, the second reference position may satisfy any one of the following (13a) to (13d):

[0136] (13a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0137] (13b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0138] (13c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0139] (13d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0140] The explanations of (13a) to (13d) above can be found in the explanations of the corresponding contents in (3a) to (3d) above, and will not be described in detail here.

[0141] (14) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0142] Alternatively, in some embodiments, the third reference position may satisfy any one of the following (14a) to (14d):

[0143] (14a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0144] (14b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0145] (14c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0146] (14d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0147] The explanations of (14a) to (14d) above can be found in the explanations of the corresponding contents in (4a) to (4d) above, and will not be described in detail here.

[0148] (15) First time information, the first time information is used to indicate at least one of the time when the handover configuration is received, the time when the conditional handover is performed, the time when the handover fails, the time when the RRC connection reestablishment is performed, and the time when the RRC connection reestablishment is completed.

[0149] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, etc. Optionally, the first time information may be an absolute time, such as UTC.

[0150] (16) First indication information, the first indication information is used to indicate that, when the first cell is associated with a third condition event, the first cell meets the leaving condition of the third condition event or does not meet the leaving condition of the third condition event, and the first cell is the cell selected by the terminal during the RRC connection reestablishment process.

[0151] The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0152] (17) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell for performing RRC connection reestablishment, a target cell for switching, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional switching, and the cell identifier includes a Tracking Area Code list (TAC list), where the Tracking Area Code list includes multiple Tracking Area Codes.

[0153] Optionally, the cell identifier may further include PLMN ID and cell ID.

[0154] (18) Second time information, the second time information is used to indicate at least one of a time for performing satellite switch with resynchronization and a time for wireless link failure.

[0155] Optionally, in some implementations, the time for performing satellite switching and resynchronization may satisfy any of the following:

[0156] If the terminal performs satellite handover and resynchronization earlier than the time when the radio link failure occurs, the time for performing satellite handover and resynchronization is the time when the terminal actually performs satellite handover and resynchronization; for example, it can be the t-Service provided by the network, or the time between t-ServiceStart and t-Service;

[0157] In the case that the time when the terminal performs satellite handover and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite handover and resynchronization is the time when the terminal can perform satellite handover and resynchronization.

[0158] Optionally, the second time information may be an absolute time, for example, UTC.

[0159] (19) Third time information, the third time information is used to indicate the time difference between the time when the satellite switching and resynchronization is performed and the time when the wireless link fails, and the time when the satellite switching and resynchronization is performed is earlier or later than the time when the wireless link fails.

[0160] The time for executing satellite switching and resynchronization here may be the same as the time for executing satellite switching and resynchronization in the above item (18). Optionally, the third time information may be an absolute time, for example, UTC.

[0161] (20) Switch failure type.

[0162] Optionally, in some implementations, when the handover type most recently performed by the terminal is RACH-less handover, the handover failure type includes RACH-less handover failure.

[0163] (21) Second indication information, the second indication information is used to indicate at least one of the following:

[0164] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0165] The terminal is configured to perform RACH-less handover and the terminal performs RACH during the handover process.

[0166] The handover process can be understood as T304 running. T304 is a timer started when the terminal performs a handover. When T304 runs, the terminal performs the handover. If the terminal completes the handover during T304 (the handover does not time out), the handover is successful. If the terminal still does not complete the handover after T304 (the handover times out), the handover fails.

[0167] In the information in items (11) to (21) above:

[0168] Items (12) and (13) of information are record information related to location-based conditional switching (Location-based CHO). In some embodiments, when the terminal supports radio link failure reporting (RLF report) and supports location-based conditional switching, when the cell switching fails, the terminal records at least one of the above-mentioned items (12) and (13), that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the second reference location.

[0169] Items (12) and (14) of information are record information related to a location-based measurement report. In some embodiments, when the terminal supports wireless link failure reporting and supports location-based measurement reporting, the terminal records at least one of the above-mentioned items (12) and (14) when cell switching fails, that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the third reference location.

[0170] Items (15) and (16) of information are record information related to time-based conditional switching (Time-based CHO). In some implementations, when the terminal supports wireless link failure reporting and supports time-based conditional switching, the terminal records at least one of the above-mentioned items (15) and (16), that is, records at least one of the first time information and the first indication information, when the cell switching fails.

[0171] Item (17) of information is record information related to the NTN cell. In some implementations, when the terminal supports radio link failure reporting and supports NTN, the terminal records the above-mentioned item (17) information when the cell handover fails, that is, records the cell identifier of the second cell, and the cell identifier includes the TAC list.

[0172] Items (18) and (19) of information are record information related to satellite switch with resynchronization. In some embodiments, when the terminal supports wireless link failure reporting and supports Satellite switch with resynchronization, the terminal records at least one of the above-mentioned items (18) and (19), that is, records at least one of the second time information and the third time information, when the cell switching fails.

[0173] Items (20) and (21) of information are RACH-less related record information. In some implementations, when the terminal supports radio link failure reporting and supports RACH-less handover under NTN, the terminal records at least one of the information in items (20) and (21) above when cell handover fails, that is, records at least one of the handover failure type (including RACH-less handover failure) and the third indication information.

[0174] Optionally, in some embodiments, when a radio link failure or a cell handover failure is detected, the terminal records the first information related to the NTN, which may also include: the terminal records the signal measurement result of the terminal's serving cell or determines not to record the signal measurement result of the terminal's serving cell.

[0175] The terminal recording or determining not to record the signal measurement result of the serving cell is related to the time when the terminal performs satellite handover and resynchronization and the time when the radio link failure occurs. In some embodiments, the terminal recording the signal measurement result of the serving cell of the terminal or determining not to record the signal measurement result of the serving cell of the terminal may include:

[0176] When the difference between the time when the terminal performs satellite handover and resynchronization and the time when the radio link failure occurs is less than or equal to the first time threshold and the time when the satellite handover and resynchronization are performed is earlier than the time when the radio link failure occurs, the terminal determines not to record the signal measurement result of the serving cell;

[0177] When the difference between the time when the terminal performs satellite switching and resynchronization and the time when the radio link failure occurs is greater than the first time threshold or the time when the terminal performs satellite switching and resynchronization is later than the time when the radio link failure occurs, the terminal records the signal measurement result of the serving cell.

[0178] The first time threshold may be determined by the terminal, agreed upon by a protocol, or configured by a network-side device, and is not specifically limited here. In the case where the terminal records the signal measurement result of the terminal's serving cell, the first information may also include the signal measurement result of the terminal's serving cell.

[0179] It should be noted that the signal measurement result of the terminal's service cell is information related to satellite switch with resynchronization. In some embodiments, when the terminal supports wireless link failure reporting and supports Satellite switch with resynchronization, the terminal records or determines not to record the signal measurement result of the terminal's service cell when it detects a wireless link failure or a cell switching failure.

[0180] Optionally, in some embodiments, if the first information is information recorded by the terminal when the cell handover is successful, the first information may be expressed as successful handover information, and the first information may include at least one of the following (22) to (28):

[0181] (22) A handover execution condition corresponding to the conditional handover candidate cell, where the handover execution condition is related to at least one of the first condition event and the second condition event.

[0182] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0183] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0184] Optionally, the switching execution condition may also be expressed as a location-based execution condition (such as CondEvent D1 or CondEvent D2) or a time-based execution condition (such as CondEvent T1).

[0185] (23) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0186] Alternatively, in some embodiments, the first reference position may satisfy any one of the following (23a) to (23h):

[0187] (23a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0188] (23b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0189] (23c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0190] (23d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0191] (23e) In the case of the third cell being associated with the fifth condition event, the terminal determines the first reference position according to the reference position of the serving cell movement, the ephemeris information of the serving cell, and the epoch time.

[0192] (23f) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0193] (23g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0194] (23h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0195] The explanations of (23a) to (23h) above can be found in the explanations of the corresponding contents in (2a) to (2h) above, and will not be described in detail here.

[0196] (24) The distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional switching.

[0197] Alternatively, in some embodiments, the second reference position may satisfy any one of the following (24a) to (24d):

[0198] (24a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0199] (24b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0200] (24c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0201] (24d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0202] The explanations of (24a) to (24d) above can be found in the explanations of the corresponding contents in (3a) to (3d) above, and will not be described in detail here.

[0203] (25) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0204] Alternatively, in some embodiments, the third reference position may satisfy any one of the following (25a) to (25d):

[0205] (25a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0206] (25b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0207] (25c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0208] (25d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0209] The explanations of (25a) to (25d) above can be found in the explanations of the corresponding contents in (4a) to (4d) above, and will not be described in detail here.

[0210] (26) First time information, the first time information is used to indicate at least one of the time when the switching configuration is received, the time when the conditional switching is performed, the time when the RRC connection reconstruction is performed, the time when the RRC connection reconstruction is completed, and the time when the switching is successful.

[0211] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, and the like.

[0212] Optionally, the first time information may be an absolute time, for example, UTC.

[0213] (27) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell for performing RRC connection reestablishment, a target cell for switching, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional switching, and the cell identifier includes a tracking area code list (TAC list), where the tracking area code list includes multiple tracking area codes.

[0214] Optionally, the cell identifier may further include PLMN ID and cell ID.

[0215] (28)Switch success type.

[0216] Optionally, in some implementations, when the handover type most recently performed by the terminal is RACH-less handover, the handover success type includes RACH-less handover success.

[0217] In the information in items (22) to (28) above:

[0218] Items (23) and (24) of information are record information related to location-based conditional switching (Location-based CHO). In some embodiments, when the terminal supports Successful Handover Report (SHR) and supports location-based conditional switching, when the cell switching is successful, the terminal records at least one of the above-mentioned items (23) and (24), that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the second reference location.

[0219] Items (23) and (25) of information are record information related to a location-based measurement report. In some embodiments, when the terminal supports a successful switching report and supports a location-based measurement report, when the cell switching is successful, the terminal records at least one of the above-mentioned items (23) and (25), that is, the terminal records at least one of the distance between the terminal and the first reference location and the distance between the terminal and the third reference location.

[0220] Item (26) of the information is record information related to time-based conditional switching (Time-based CHO). In some implementations, when the terminal supports successful switching reporting and supports time-based conditional switching, when the cell switching is successful, the terminal records the above-mentioned item (26) information, that is, records the first time information.

[0221] Item (27) of information is record information related to the NTN cell. In some implementations, when the terminal supports successful switching reporting and supports NTN, when the cell switching is successful, the terminal records the above-mentioned item (17), that is, records the cell identifier of the second cell, and the cell identifier includes the TAC list.

[0222] Item (28) of the information is RACH-less related record information. In some implementations, when the terminal supports successful handover reporting and supports RACH-less handover under NTN, the terminal records the above-mentioned item (28) information, i.e., records the handover success type (including RACH-less handover success) when detecting that the cell handover is successful.

[0223] Optionally, in some implementations, the terminal recording the first information related to the NTN may further include:

[0224] When the second condition is met, the terminal records the first information related to the NTN.

[0225] The first information here may be the first information recorded by the terminal when the cell handover is successful. That is, when the cell handover is successful, the terminal determines whether the second condition is satisfied. If the second condition is satisfied, the terminal records the first information related to the NTN. The first information may include at least one of the above (22) to (28). The second condition may include at least one of the following:

[0226] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0227] The terminal is configured to perform RACH-less handover and the terminal performs RACH;

[0228] When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

[0229] The second time threshold can be determined by the terminal, agreed upon by the protocol, or configured by network-side equipment, and is not specifically limited here. The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN. If the third conditional event is CondEvent T1, the fourth time can be t1-Threshold indicated in CondEvent T1.

[0230] In some implementations, the second condition may be indicated to the terminal by the network side device. Specifically, in the case of NTN communication, the terminal may include:

[0231] The terminal receives a first configuration sent by a network-side device, where the first configuration includes third indication information, and the third indication information is used to instruct the terminal to record first information related to the NTN when a second condition is met.

[0232] In this way, after receiving the first configuration sent by the network side device, if the cell switching is successful, if the second condition indicated by the third indication information in the first configuration is met, the terminal records the first information related to the NTN, and the first information may include at least one of the above (22) to (28).

[0233] Optionally, in some implementations, the terminal may store the first information in addition to recording the first information. There may be various storage methods, which are not specifically limited here.

[0234] S404: The terminal sends first information to the network-side device.

[0235] When recording the first information, the terminal may send the first information to the network side device.

[0236] Optionally, in some implementations, the terminal sending the first information to the network-side device may include at least one of the following:

[0237] The terminal sends a radio link failure report (RLF report) to the network side device, where the radio link failure report includes the first information; that is, the first information is used as part of the radio link failure report, and the terminal reports the first information to the network side device through the RLF report process;

[0238] The terminal sends a successful handover report (SHR) to the network side device, and the successful handover report includes the first information; that is, the first information is used as part of the successful handover report, and the terminal reports the first information to the network side device through the successful handover report process.

[0239] The first information may include at least one of information recorded by the terminal in the event of a radio link failure, information recorded in the event of a cell handover failure, and information recorded in the event of a successful cell handover. The terminal may include the first information recorded in the event of a radio link failure in a radio link failure report and send it to the network device. The terminal may also include the first information recorded in the event of a cell handover failure in a radio link failure report and send it to the network device. The terminal may also include the first information recorded in the event of a successful cell handover in a successful handover report and send it to the network device.

[0240] In some implementations, when the terminal sends a radio link failure report (RLF report) to the network side device, the following steps may be included:

[0241] Step 1: The terminal stores the RLF report to the first variable.

[0242] Optionally, when the terminal stores the RLF report in the first variable, the first variable may further include at least one network identifier (e.g., plmn-IdentityList / npn-IdentityList), and the at least one network identifier may include a network registered by the terminal / a network selected, and a network equivalent to the registered network / selected network.

[0243] Step 2: The terminal sends a first indication to the network side device, where the first indication is used to indicate that the terminal has an available RLF report.

[0244] Optionally, when the terminal sends the first indication to the network side device, the first indication may be carried by a Radio Resource Control (RRC) connection establishment complete / connection reestablishment complete / connection recovery complete / connection reconfiguration complete message.

[0245] Step 3: The terminal receives a second indication sent by the network-side device, where the second indication is used to request the terminal to send an RLF report.

[0246] Optionally, the second indication may be carried by a UEInformationRequest message.

[0247] Step 4: The terminal sends an RLF report to the network device.

[0248] Optionally, when the terminal sends an RLF report to the network side device, the RLF report may be carried by a UEInformationResponse message.

[0249] In some implementations, when the terminal sends a successful handover report (SHR) to the network-side device, the following steps may be included:

[0250] Step 1: The terminal stores SHR into the first variable.

[0251] Optionally, when the terminal stores the SHR in the first variable, the first variable may also include at least one network identifier (e.g., plmn-IdentityList / npn-IdentityList), and the at least one network identifier may include the network registered / selected by the terminal, and a network equivalent to the registered network / selected network.

[0252] Step 2: The terminal sends a third indication to the network-side device, where the first indication is used to indicate that the terminal has an available SHR.

[0253] Optionally, when the terminal sends the third indication to the network side device, the third indication may be carried by an RRC connection establishment complete / connection reestablishment complete / connection recovery complete / connection reconfiguration complete message.

[0254] Step 3: The terminal receives a fourth indication sent by the network-side device, where the fourth indication is used to request the terminal to send an SHR.

[0255] Optionally, the fourth indication may be carried by a UEInformationRequest message.

[0256] Step 4: The terminal sends an SHR to the network device.

[0257] Optionally, when the terminal sends the SHR to the network-side device, the SHR may be carried in a UEInformationResponse message.

[0258] In an embodiment of the present application, since the terminal can record the first information related to the NTN and send the first information to the network side device when the first condition related to the wireless link is met, the network side device can obtain the wireless link status under the NTN based on the first information, thereby optimizing the relevant configuration of the terminal's mobility management and improving the terminal's wireless link communication under the NTN.

[0259] As shown in Figure 5, an embodiment of the present application provides an information receiving method 500, which can be executed by a network side device. In other words, the information receiving method can be executed by software or hardware installed on the network side device. The information receiving method includes the following steps.

[0260] S502: The network-side device receives first information sent by the terminal, where the first information is related to the NTN and is recorded by the terminal.

[0261] In a scenario where a terminal communicates over an NTN, a network-side device may receive first information sent by the terminal, where the first information is related to the NTN. The first information is recorded by the terminal when a first condition related to a wireless link is satisfied. The specific implementation of recording the first information by the terminal can be found in the embodiment shown in FIG. 4 and is not repeated here.

[0262] The first information may be information recorded by the terminal when a radio link failure is detected, or information recorded when a cell handover fails, or information recorded when a cell handover succeeds. Optionally, in some embodiments, if the first information is information recorded by the terminal when a radio link failure is detected, the first information may include at least one of the following (1) to (10):

[0263] (1) A handover execution condition corresponding to a conditional handover candidate cell, where the handover execution condition is related to at least one of a first condition event and a second condition event.

[0264] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0265] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0266] (2) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0267] Optionally, in some embodiments, the first reference position may satisfy any one of the following (2a) to (2h):

[0268] (2a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0269] (2b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0270] (2c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0271] (2d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0272] (2e) When the third cell is associated with the fifth condition event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0273] (2f) When the third cell is associated with the fifth condition event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0274] (2g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0275] (2h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0276] (3) The distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional handover.

[0277] Optionally, in some embodiments, the second reference position may satisfy any one of the following (3a) to (3d):

[0278] (3a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0279] (3b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0280] (3c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0281] (3d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0282] (4) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0283] Optionally, in some embodiments, the third reference position may satisfy any one of the following (4a) to (4d):

[0284] (4a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0285] (4b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0286] (4c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0287] (4d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0288] (5) First time information, the first time information is used to indicate at least one of the time when the handover configuration is received, the time when the conditional handover is performed, the time when the radio link fails, the time when the RRC connection reestablishment is performed, and the time when the RRC connection reestablishment is completed.

[0289] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, and the like.

[0290] Optionally, the first time information may be an absolute time, for example, UTC.

[0291] (6) First indication information, the first indication information is used to indicate whether the first cell satisfies the leaving condition of the third condition event or does not satisfy the leaving condition of the third condition event when the first cell is associated with the third condition event, and the first cell is the cell selected by the terminal during the RRC connection reestablishment process.

[0292] The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0293] (7) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell where a radio link failure occurs, a cell where an RRC connection is reestablished, a target cell for handover, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional handover. The cell identifier includes a Tracking Area Code list (TAC list), where the Tracking Area Code list includes multiple Tracking Area Codes.

[0294] Optionally, the cell identifier may further include PLMN ID and cell ID.

[0295] (8) Second time information, where the second time information is used to indicate at least one of a time for performing satellite switch with resynchronization and a time for a wireless link failure.

[0296] Optionally, in some implementations, the time for performing satellite switching and resynchronization may satisfy any of the following:

[0297] If the terminal performs satellite handover and resynchronization earlier than the time when the radio link failure occurs, the time for performing satellite handover and resynchronization is the time when the terminal actually performs satellite handover and resynchronization; for example, it can be the t-Service provided by the network, or the time between t-ServiceStart and t-Service;

[0298] In the case that the time when the terminal performs satellite handover and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite handover and resynchronization is the time when the terminal can perform satellite handover and resynchronization.

[0299] Optionally, the second time information may be an absolute time, for example, UTC.

[0300] (9) Third time information, the third time information is used to indicate the time difference between the time when the satellite switching and resynchronization is performed and the time when the wireless link fails, and the time when the satellite switching and resynchronization is performed is earlier or later than the time when the wireless link fails.

[0301] Optionally, in some implementations, the time for performing satellite switching and resynchronization may satisfy any of the following:

[0302] If the terminal performs satellite handover and resynchronization earlier than the time when the radio link failure occurs, the time for performing satellite handover and resynchronization is the time when the terminal actually performs satellite handover and resynchronization; for example, it can be the t-Service provided by the network, or the time between t-ServiceStart and t-Service;

[0303] In the case that the time when the terminal performs satellite handover and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite handover and resynchronization is the time when the terminal can perform satellite handover and resynchronization.

[0304] Optionally, the third time information may be an absolute time, for example, UTC.

[0305] (10) Second indication information, the second indication information is used to indicate at least one of the following:

[0306] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0307] The terminal is configured to perform RACH-less handover and the terminal performs RACH during the handover process.

[0308] The handover process can be understood as T304 running. T304 is a timer started when the terminal performs a handover. When T304 runs, the terminal performs the handover. If the terminal completes the handover during T304 (the handover does not time out), the handover is successful. If the terminal still does not complete the handover after T304 (the handover times out), the handover fails.

[0309] The detailed explanation of the above-mentioned information items (1) to (10) can be found in the explanation of the corresponding content in the embodiment shown in FIG4 , and will not be repeated here. Among them, in the above-mentioned information items (1) to (10):

[0310] Items (2) and (3) are log information related to location-based CHO, items (2) and (4) are log information related to location-based measurement report, items (5) and (6) are log information related to time-based CHO, item (7) is log information related to NTN cell, items (8) and (9) are log information related to satellite switch with resynchronization, and item (10) is log information related to RACH-less.

[0311] Optionally, in some embodiments, in the event of a terminal wireless link failure or a cell switching failure, the first information recorded and sent by the terminal to the network side device may also include a signal measurement result of the terminal's service cell. The signal measurement result may be sent by the terminal to the network side device when it is determined that the difference between the time when satellite switching and resynchronization is performed and the time when the wireless link failure occurs is greater than a first time threshold or the time when satellite switching and resynchronization is performed is later than the time when the wireless link failure occurs. For details, please refer to the corresponding content in the embodiment shown in Figure 4, which will not be repeated here.

[0312] Optionally, in some implementations, if the first information is information recorded by the terminal when a cell handover fails, the first information may include at least one of the following (11) to (21):

[0313] (11) A handover execution condition corresponding to the conditional handover candidate cell, where the handover execution condition is related to at least one of the first condition event and the second condition event.

[0314] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0315] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0316] (12) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0317] Alternatively, in some embodiments, the first reference position may satisfy any one of the following (12a) to (12h):

[0318] (12a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0319] (12b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0320] (12c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0321] (12d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0322] (12e) When the third cell is associated with the fifth condition event, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0323] (12f) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0324] (12g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0325] (12h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0326] (13) The distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional switching.

[0327] Alternatively, in some embodiments, the second reference position may satisfy any one of the following (13a) to (13d):

[0328] (13a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0329] (13b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0330] (13c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0331] (13d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0332] (14) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0333] Alternatively, in some embodiments, the third reference position may satisfy any one of the following (14a) to (14d):

[0334] (14a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0335] (14b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0336] (14c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0337] (14d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0338] (15) First time information, the first time information is used to indicate at least one of the time when the handover configuration is received, the time when the conditional handover is performed, the time when the handover fails, the time when the RRC connection reestablishment is performed, and the time when the RRC connection reestablishment is completed.

[0339] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, and the like.

[0340] Optionally, the first time information may be an absolute time, for example, UTC.

[0341] (16) First indication information, the first indication information is used to indicate that, when the first cell is associated with a third condition event, the first cell meets the leaving condition of the third condition event or does not meet the leaving condition of the third condition event, and the first cell is the cell selected by the terminal during the RRC connection reestablishment process.

[0342] The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0343] (17) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell for performing RRC connection reestablishment, a target cell for switching, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional switching, and the cell identifier includes a Tracking Area Code list (TAC list), where the Tracking Area Code list includes multiple Tracking Area Codes.

[0344] Optionally, the cell identifier may further include PLMN ID and cell ID.

[0345] (18) Second time information, the second time information is used to indicate at least one of a time for performing satellite switch with resynchronization and a time for wireless link failure.

[0346] Optionally, the second time information may be an absolute time, for example, UTC.

[0347] (19) Third time information, the third time information is used to indicate the time difference between the time when the satellite switching and resynchronization is performed and the time when the wireless link fails, and the time when the satellite switching and resynchronization is performed is earlier or later than the time when the wireless link fails.

[0348] Optionally, the third time information may be an absolute time, for example, UTC.

[0349] (20) Switch failure type.

[0350] Optionally, in some implementations, when the handover type most recently performed by the terminal is RACH-less handover, the handover failure type includes RACH-less handover failure.

[0351] (21) Second indication information, the second indication information is used to indicate at least one of the following:

[0352] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0353] The terminal is configured to perform RACH-less handover and the terminal performs RACH during the handover process.

[0354] The handover process can be understood as T304 running. T304 is a timer started when the terminal performs a handover. When T304 runs, the terminal performs the handover. If the terminal completes the handover during T304 (the handover does not time out), the handover is successful. If the terminal still does not complete the handover after T304 (the handover times out), the handover fails.

[0355] The detailed explanation of the above-mentioned information items (11) to (21) can be found in the explanation of the corresponding content in the embodiment shown in FIG4 , and will not be repeated here. Among them, in the above-mentioned information items (11) to (21):

[0356] Items (12) and (13) are record information related to location-based CHO, items (12) and (14) are record information related to location-based measurement report, items (15) and (16) are record information related to time-based CHO, item (17) is record information related to NTN cell, items (18) and (19) are record information related to satellite switch with resynchronization, and items (20) and (21) are record information related to RACH-less.

[0357] Optionally, in some embodiments, if the first information is information recorded by the terminal when the cell handover is successful, the first information may be expressed as successful handover information, and the first information may include at least one of the following (22) to (28):

[0358] (22) A handover execution condition corresponding to the conditional handover candidate cell, where the handover execution condition is related to at least one of the first condition event and the second condition event.

[0359] The first conditional event is a conditional event related to location, such as CondEvent D1 or CondEvent D2. CondEvent D1 and CondEvent D2 are location-based Conditional Handover (CHO) triggering events introduced in NTN.

[0360] The second conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN.

[0361] (23) A distance between the terminal and a first reference position, where the first reference position is related to a serving cell of the terminal.

[0362] Alternatively, in some embodiments, the first reference position may satisfy any one of the following (23a) to (23h):

[0363] (23a) In the case where the third cell is associated with the fourth condition event, the first reference position is the reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching.

[0364] (23b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference location is the reference location of the serving cell indicated in the fourth condition event.

[0365] (23c) When the terminal is configured with a first event, the first reference location is a reference location of the serving cell indicated in the first event.

[0366] (23d) When the terminal is configured with a first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event.

[0367] (23e) In the case of the third cell being associated with the fifth condition event, the terminal determines the first reference position according to the reference position of the serving cell movement, the ephemeris information of the serving cell, and the epoch time.

[0368] (23f) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position based on the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0369] (23g) When the terminal is configured with the second event, the terminal determines the first reference position according to the reference position moved by the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0370] (23h) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to the reference position of the serving cell, the ephemeris information of the serving cell, and the epoch time.

[0371] (24) The distance between the terminal and a second reference location, where the second reference location is related to a candidate cell for conditional switching.

[0372] Alternatively, in some embodiments, the second reference position may satisfy any one of the following (24a) to (24d):

[0373] (24a) In the case where the third cell is associated with the fourth condition event, the second reference position is the reference position of the candidate cell indicated in the fourth condition event, and the third cell is the candidate cell for conditional switching.

[0374] (24b) When the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event.

[0375] (24c) When the third cell is associated with the fifth condition event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth condition event, and the corresponding epoch time.

[0376] (24d) When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position based on the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time.

[0377] (25) The distance between the terminal and a third reference position, where the third reference position is related to a neighboring cell of the serving cell.

[0378] Alternatively, in some embodiments, the third reference position may satisfy any one of the following (25a) to (25d):

[0379] (25a) When the terminal is configured with the first event, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0380] (25b) When the terminal is configured with the first event and the connection failure type of the terminal is radio link failure, the third reference location is the reference location of the neighboring cell indicated in the first event.

[0381] (25c) When the terminal is configured with the second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0382] (25d) When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines a third reference position based on the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time.

[0383] (26) First time information, the first time information is used to indicate at least one of the time when the switching configuration is received, the time when the conditional switching is performed, the time when the RRC connection reconstruction is performed, the time when the RRC connection reconstruction is completed, and the time when the switching is successful.

[0384] The switching configuration may be a configuration for conditional switching, such as CondEvent D1, Event D1, CondEvent D2, Event D2, and the like.

[0385] Optionally, the first time information may be an absolute time, for example, UTC.

[0386] (27) A cell identifier of a second cell, where the second cell includes at least one of a serving cell of the terminal, a cell for performing RRC connection reestablishment, a target cell for switching, a neighboring cell of the serving cell of the terminal, and a candidate cell for conditional switching, and the cell identifier includes a tracking area code list (TAC list), where the tracking area code list includes multiple tracking area codes.

[0387] Optionally, the cell identifier may further include PLMN ID and cell ID.

[0388] (28)Switch success type.

[0389] Optionally, in some implementations, when the handover type most recently performed by the terminal is RACH-less handover, the handover success type includes RACH-less handover success.

[0390] The detailed explanation of the above-mentioned information items (22) to (28) can be found in the explanation of the corresponding content in the embodiment shown in FIG4 , and will not be repeated here. Among them, in the above-mentioned information items (22) to (28):

[0391] Items (23) and (24) are log information related to location-based CHO, items (23) and (25) are log information related to location-based measurement reports, item (26) is log information related to time-based CHO, item (27) is log information related to NTN cells, and item (28) is log information related to RACH-less.

[0392] Optionally, in some implementations, the network-side device may include the following steps:

[0393] The network-side device sends a first configuration to the terminal, where the first configuration includes third indication information, and the third indication information is used to instruct the terminal to record the first information when a second condition is met.

[0394] The first information here may be successful handover information. That is, in a scenario where the terminal communicates based on NTN, the network-side device may send a first configuration to the terminal, which indicates that the terminal may record successful handover information related to NTN when the cell handover is successful and the second condition is met. For the terminal, when the cell handover is successful, it may be determined whether the second condition is met. If the second condition is met, the terminal records the successful handover information related to NTN, which may include at least one of the above (12) to (18). The second condition may include at least one of the following:

[0395] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0396] The terminal is configured to perform RACH-less handover and the terminal performs RACH;

[0397] When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

[0398] The third conditional event is a time-related conditional event, such as CondEvent T1. CondEvent T1 is a time-based CHO triggering event introduced in NTN. If the third conditional event is CondEvent T1, the fourth time may be t1-Threshold indicated in CondEvent T1. The second time threshold may be determined by the terminal, agreed upon by the protocol, or configured by network-side equipment, and is not specifically limited here.

[0399] Optionally, in some implementations, the network-side device receiving the first information sent by the terminal may include at least one of the following:

[0400] The network-side device receives a radio link failure report (RLF report) sent by the terminal, where the radio link failure report includes first information;

[0401] The network side device receives a successful handover report (SHR) sent by the terminal, where the successful handover report includes first information.

[0402] The first information may include at least one of information recorded by the terminal in the event of a radio link failure, information recorded in the event of a cell handover failure, and information recorded in the event of a successful cell handover. If the network-side device receives a radio link failure report, the first information carried in the radio link failure report includes information recorded by the terminal when a radio link failure or a cell handover failure is detected. If the network-side device receives a successful handover report, the first information carried in the successful handover report is information recorded by the terminal when a cell handover is successful. If the network-side device receives a radio link failure report and a successful handover report, the first information carried in the radio link failure report is information recorded by the terminal when a radio link failure or a cell handover failure is detected, and the first information carried in the successful handover report is information recorded by the terminal when a cell handover is successful.

[0403] Optionally, in some implementations, after receiving the first information, the network-side device may store the first information. There may be multiple storage methods, which are not specifically limited here.

[0404] Optionally, in some implementations, after receiving the first information, the network-side device may optimize the relevant configuration of the terminal's mobility management according to the first information to improve the wireless link communication of the terminal under the NTN.

[0405] In an embodiment of the present application, since the terminal can record the first information related to the NTN and send the first information to the network side device when the first condition related to the wireless link is met, the network side device can obtain the wireless link status under the NTN based on the first information, thereby optimizing the relevant configuration of the terminal's mobility management and improving the terminal's wireless link communication under the NTN.

[0406] The information sending method provided in the embodiments of the present application may be executed by an information sending device. In the embodiments of the present application, the information sending device provided in the embodiments of the present application is described by taking an information sending device executing the information sending method as an example. The information receiving method provided in the embodiments of the present application may be executed by an information receiving device. In the embodiments of the present application, the information receiving device provided in the embodiments of the present application is described by taking an information receiving device executing the information receiving method as an example.

[0407] FIG6 is a schematic diagram of the structure of an information sending device according to an embodiment of the present application, which may correspond to a terminal in other embodiments. As shown in FIG6 , the device 600 includes the following modules.

[0408] The recording module 601 is configured to record first information related to the non-terrestrial network NTN when a first condition related to the wireless link is met;

[0409] The sending module 602 is configured to send the first information to a network-side device.

[0410] Optionally, in some embodiments, the first condition includes at least one of the following:

[0411] The terminal detects a wireless link failure;

[0412] Cell handover failed;

[0413] The cell handover is successful;

[0414] The terminal satisfies at least one of the following conditions:

[0415] The serving cell of the terminal is an NTN cell;

[0416] The target cell for cell handover performed by the terminal is the NTN cell.

[0417] Optionally, in some embodiments, the first information includes at least one of the following:

[0418] a handover execution condition corresponding to the conditional handover candidate cell, the handover execution condition being related to at least one of a first condition event and a second condition event, the first condition event being a condition event related to location, and the second condition event being a condition event related to time;

[0419] a distance between the terminal and a first reference location, where the first reference location is related to a serving cell of the terminal;

[0420] a distance between the terminal and a second reference location, the second reference location being related to a candidate cell for conditional handover;

[0421] a distance between the terminal and a third reference location, where the third reference location is related to a neighboring cell of the serving cell;

[0422] First time information, where the first time information is used to indicate at least one of a time when a handover configuration is received, a time when a conditional handover is performed, a time when a handover fails, a time when a radio link fails, a time when an RRC connection reestablishment is performed, a time when the RRC connection reestablishment is completed, and a time when a handover is successful;

[0423] first indication information, where the first indication information is used to indicate, when a first cell is associated with a third conditional event, whether the first cell satisfies a leaving condition of the third conditional event or does not satisfy the leaving condition of the third conditional event, the first cell being a cell selected by the terminal during the RRC connection reestablishment process, and the third conditional event being a time-related conditional event;

[0424] a cell identifier of a second cell, the second cell including at least one of the serving cell, the cell where a radio link failure occurs, the cell performing RRC connection reestablishment, the target cell for handover, the neighboring cell, and a candidate cell for conditional handover, the cell identifier including a tracking area code list, the tracking area code list including multiple tracking area codes;

[0425] second time information, where the second time information is used to indicate at least one of a time when satellite switching and resynchronization are performed and a time when a wireless link fails;

[0426] third time information, where the third time information is used to indicate a time difference between a time when satellite switching and resynchronization are performed and a time when the radio link fails, where the time when satellite switching and resynchronization are performed is earlier than or later than the time when the radio link fails;

[0427] Switch failure type;

[0428] Switch success type;

[0429] The second indication information is used to indicate at least one of the following: the configuration authorization CG configured by the network for RACH-less switching does not meet the synchronization signal block SSB measurement threshold; the terminal is configured to perform RACH-less switching and the terminal executes at least one of RACH during the switching process.

[0430] Optionally, in some implementations, the recording module 601 is configured to:

[0431] If the terminal supports radio link failure reporting and supports conditional handover based on location, record at least one of a distance between the terminal and a first reference location and a distance between the terminal and a second reference location;

[0432] In a case where the terminal supports radio link failure reporting and supports location-based measurement reporting, at least one of a distance between the terminal and a first reference location and a distance between the terminal and a third reference location is recorded.

[0433] Optionally, in some implementations, when the first information includes the distance between the terminal and the first reference location, the first reference location satisfies any one of the following:

[0434] In a case where the third cell is associated with a fourth condition event, the first reference position is a reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional handover;

[0435] In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference position is the reference position of the serving cell indicated in the fourth condition event;

[0436] In a case where the terminal is configured with a first event, the first reference location is a reference location of a serving cell indicated in the first event;

[0437] When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event;

[0438] In the case where the third cell is associated with a fifth condition event, the terminal determines the first reference position according to a reference position moved by the serving cell, ephemeris information of the serving cell, and an epoch time;

[0439] In a case where the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position according to a reference position of movement of the serving cell, ephemeris information of the serving cell, and an epoch time;

[0440] In a case where the terminal is configured with a second event, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time;

[0441] When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time;

[0442] The fourth conditional event and the fifth conditional event are conditional events related to location, and the first event and the second event are events related to location.

[0443] Optionally, in some implementations, when the first information includes the distance between the terminal and the second reference location, the second reference location satisfies any one of the following:

[0444] In a case where the third cell is associated with a fourth condition event, the second reference position is a reference position of the candidate cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching;

[0445] In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event;

[0446] In a case where the third cell is associated with a fifth conditional event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time;

[0447] When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time;

[0448] The fourth conditional event and the fifth conditional event are conditional events related to location.

[0449] Optionally, in some implementations, when the first information includes the distance between the terminal and the third reference location, the third reference location satisfies any one of the following:

[0450] In a case where the terminal is configured with a first event, the third reference location is a reference location of a neighboring cell indicated in the first event;

[0451] When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the third reference location is a reference location of a neighboring cell indicated in the first event;

[0452] When the terminal is configured with a second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time;

[0453] When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time;

[0454] The first event and the second event are location-related events.

[0455] Optionally, in some embodiments, at least one of the following is included:

[0456] The first time information is absolute time;

[0457] The second time information is absolute time;

[0458] The third time information is absolute time.

[0459] Optionally, in some implementations, the recording module 601 is configured to:

[0460] Record a signal measurement result of the serving cell of the terminal or determine not to record the signal measurement result of the serving cell of the terminal.

[0461] Optionally, in some implementations, the recording module 601 is configured to:

[0462] Determine not to record the signal measurement result of the serving cell if the difference between the time when the terminal performs satellite handover and resynchronization and the time when the radio link failure occurs is less than or equal to a first time threshold and the time when the satellite handover and resynchronization are performed is earlier than the time when the radio link failure occurs;

[0463] When the difference between the time when the terminal performs satellite switching and resynchronization and the time when the radio link failure occurs is greater than the first time threshold or the time when the satellite switching and resynchronization is performed is later than the time when the radio link failure occurs, the signal measurement result of the serving cell is recorded.

[0464] Optionally, in some embodiments, any of the following is included:

[0465] In a case where the time when the terminal performs satellite switching and resynchronization is earlier than the time when the radio link failure occurs, the time when the satellite switching and resynchronization is performed is the time when the terminal actually performs satellite switching and resynchronization;

[0466] In a case where the time when the terminal performs satellite switching and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite switching and resynchronization is the time when the terminal can perform satellite switching and resynchronization.

[0467] Optionally, in some implementations, when the handover type most recently performed by the terminal is RACH-less handover, the handover failure type includes RACH-less handover failure;

[0468] In a case where the handover type most recently performed by the terminal is RACH-less handover, the handover success type includes RACH-less handover success.

[0469] Optionally, in some implementations, the sending module 602 is configured to perform at least one of the following:

[0470] Sending a radio link failure report to the network side device, where the radio link failure report includes the first information;

[0471] A successful switching report is sent to the network side device, where the successful switching report includes the first information.

[0472] Optionally, in some implementations, the recording module 601 is further configured to:

[0473] If the second condition is met, recording first information related to the non-terrestrial network NTN;

[0474] The second condition includes at least one of the following:

[0475] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0476] The terminal is configured to perform RACH-less handover and the terminal performs RACH;

[0477] When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

[0478] Optionally, in some embodiments, the apparatus 600 further includes a receiving module, wherein the receiving module is configured to:

[0479] Receive a first configuration sent by the network side device, where the first configuration includes third indication information, and the third indication information is used to instruct the terminal to record the first information when the second condition is met.

[0480] Optionally, in some embodiments, the apparatus 600 further includes a storage module, wherein the storage module is configured to:

[0481] The terminal stores the first information.

[0482] According to the device 600 of the embodiment of the present application, the process of the method 400 corresponding to the embodiment of the present application can be referred to, and the various units / modules in the device 600 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes in the method 400, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0483] FIG7 is a schematic diagram of the structure of an information receiving device according to an embodiment of the present application, which may correspond to a network-side device in other embodiments. As shown in FIG7 , the device 700 includes the following modules.

[0484] The receiving module 701 is configured to receive first information sent by a terminal, where the first information is related to the NTN and is recorded by the terminal.

[0485] Optionally, in some embodiments, the first information includes at least one of the following:

[0486] a handover execution condition corresponding to the conditional handover candidate cell, the handover execution condition being related to at least one of a first condition event and a second condition event, the first condition event being a condition event related to location, and the second condition event being a condition event related to time;

[0487] a distance between the terminal and a first reference location, where the first reference location is related to a serving cell of the terminal;

[0488] a distance between the terminal and a second reference location, the second reference location being related to a candidate cell for conditional handover;

[0489] a distance between the terminal and a third reference location, where the third reference location is related to a neighboring cell of the serving cell;

[0490] First time information, where the first time information is used to indicate at least one of a time when a handover configuration is received, a time when a conditional handover is performed, a time when a handover fails, a time when a radio link fails, a time when an RRC connection reestablishment is performed, a time when the RRC connection reestablishment is completed, and a time when a handover is successful;

[0491] first indication information, where the first indication information is used to indicate, when a first cell is associated with a third conditional event, whether the first cell satisfies a leaving condition of the first conditional event or does not satisfy a leaving condition of the third conditional event, the first cell being a cell selected by the terminal during the RRC connection reestablishment process, and the third conditional event being a time-related conditional event;

[0492] a cell identifier of a second cell, the second cell including at least one of the serving cell, the cell where a radio link failure occurs, the cell performing RRC link reestablishment, the target cell for handover, the neighboring cell, and a candidate cell for conditional handover, the cell identifier including a tracking area code list, the tracking area code list including multiple tracking area codes;

[0493] second time information, where the second time information is used to indicate at least one of a time when satellite switching and resynchronization are performed and a time when a wireless link fails;

[0494] third time information, where the third time information is used to indicate a time difference between a time when satellite switching and resynchronization are performed and a time when the radio link fails, where the time when satellite switching and resynchronization are performed is before or after the time when the radio link fails;

[0495] Switch failure type;

[0496] Switch success type;

[0497] The second indication information is used to indicate at least one of the following: the CGs configured by the network for RACH-less switching do not meet the SSB measurement threshold; the terminal is configured to perform RACH-less switching and the terminal performs at least one of the RACHs during the switching process.

[0498] Optionally, in some implementations, when the first information includes the distance between the terminal and the first reference location, the first reference location satisfies any one of the following:

[0499] In a case where the third cell is associated with a fourth condition event, the first reference position is a reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional handover;

[0500] In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference position is the reference position of the serving cell indicated in the fourth condition event;

[0501] In a case where the terminal is configured with a first event, the first reference location is a reference location of a serving cell indicated in the first event;

[0502] When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event;

[0503] In the case where the third cell is associated with a fifth condition event, the terminal determines the first reference position according to a reference position moved by the serving cell, ephemeris information of the serving cell, and an epoch time;

[0504] In a case where the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position according to a reference position of movement of the serving cell, ephemeris information of the serving cell, and an epoch time;

[0505] In a case where the terminal is configured with a second event, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time;

[0506] When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time;

[0507] The fourth conditional event and the fifth conditional event are conditional events related to location, and the first event and the second event are events related to location.

[0508] Optionally, in some implementations, when the first information includes the distance between the terminal and the second reference location, the second reference location satisfies any one of the following:

[0509] In a case where the third cell is associated with a fourth condition event, the second reference position is a reference position of the candidate cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching;

[0510] In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event;

[0511] In a case where the third cell is associated with a fifth conditional event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time;

[0512] When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time;

[0513] The fourth conditional event and the fifth conditional event are conditional events related to location.

[0514] Optionally, in some implementations, when the first information includes the distance between the terminal and the third reference location, the third reference location satisfies any one of the following:

[0515] In a case where the terminal is configured with a first event, the third reference location is a reference location of a neighboring cell indicated in the first event;

[0516] When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the third reference location is a reference location of a neighboring cell indicated in the first event;

[0517] When the terminal is configured with a second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time;

[0518] When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time;

[0519] The first event and the second event are location-related events.

[0520] Optionally, in some embodiments, at least one of the following is included:

[0521] The first time information is absolute time;

[0522] The second time information is absolute time;

[0523] The third time information is absolute time.

[0524] Optionally, in some embodiments, any of the following is included:

[0525] In a case where the time when the terminal performs satellite switching and resynchronization is earlier than the time when the radio link failure occurs, the time when the satellite switching and resynchronization is performed is the time when the terminal actually performs satellite switching and resynchronization;

[0526] In a case where the time when the terminal performs satellite switching and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite switching and resynchronization is the time when the terminal can perform satellite switching and resynchronization.

[0527] Optionally, in some implementations, the receiving module 701 is configured to perform at least one of the following:

[0528] receiving a radio link failure report sent by the terminal, where the radio link failure report includes the first information;

[0529] A successful handover report sent by the terminal is received, where the successful handover report includes the first information.

[0530] Optionally, in some implementations, the apparatus 700 further includes a sending module, wherein the sending module is configured to:

[0531] Sending a first configuration to the terminal, where the first configuration includes third indication information, where the third indication information is used to instruct the terminal to record the first information when a second condition is met;

[0532] The second condition includes at least one of the following:

[0533] None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold;

[0534] The terminal is configured to perform RACH-less handover and the terminal performs RACH;

[0535] When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

[0536] Optionally, in some embodiments, the apparatus 700 further includes an optimization module, wherein the optimization module is configured to:

[0537] The relevant configuration of the mobility management of the terminal is optimized according to the first information.

[0538] Optionally, in some embodiments, the apparatus 700 further includes a storage module, wherein the storage module is configured to:

[0539] The first information is stored.

[0540] According to the device 700 of the embodiment of the present application, the process of the method 500 corresponding to the embodiment of the present application can be referred to, and the various units / modules in the device 700 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes in the method 500, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0541] The information sending device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0542] The information sending device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0543] The information receiving device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a network-side device, or it can be a device other than a network-side device. For example, the network-side device can include, but is not limited to, the types of network-side devices 12 listed above. Other devices can include servers, network attached storage (NAS), etc., and the embodiments of the present application do not specifically limit this.

[0544] The information receiving device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0545] As shown in Figure 8, an embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores a program or instruction that can be run on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction, when executed by the processor 801, implements the various steps of the above-mentioned information sending method embodiment and can achieve the same technical effect. When the communication device 800 is a network-side device, the program or instruction, when executed by the processor 801, implements the various steps of the above-mentioned information receiving method embodiment and can achieve the same technical effect. To avoid repetition, they are not described here.

[0546] The present application also provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG4 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0547] The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909 and at least some of the components of the processor 910.

[0548] Those skilled in the art will appreciate that the terminal 900 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 910 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG9 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0549] It should be understood that in an embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0550] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 901 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 901 may send uplink data to the network-side device. Typically, the RF unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0551] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, 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. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0552] Processor 910 may include one or more processing units. Optionally, processor 910 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 910.

[0553] The processor 910 is configured to record first information related to the non-terrestrial network NTN when a first condition related to the wireless link is met; and the radio frequency unit 901 is configured to send the first information to a network-side device.

[0554] In this way, since the terminal can record the first information related to the NTN and send the first information to the network side device when the first condition related to the wireless link is met, the network side device can obtain the wireless link status under the NTN based on the first information, thereby optimizing the relevant configuration of the terminal's mobility management and improving the terminal's wireless link communication under the NTN.

[0555] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment 400 and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0556] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG5 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0557] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 10, network-side device 1000 includes an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104, and a memory 105. Antenna 101 is connected to radio frequency device 102. In the uplink direction, radio frequency device 102 receives information via antenna 101 and sends the received information to baseband device 103 for processing. In the downlink direction, baseband device 103 processes the information to be transmitted and sends it to radio frequency device 102. Radio frequency device 102 processes the received information and then sends it through antenna 101.

[0558] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 103 , which includes a baseband processor.

[0559] The baseband device 103 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 10, one of which is, for example, a baseband processor, which is connected to the memory 105 through a bus interface to call the program in the memory 105 and execute the network device operations shown in the above method embodiment.

[0560] The network side device may further include a network interface 106, which is, for example, a Common Public Radio Interface (CPRI).

[0561] Specifically, the network side device 1000 of an embodiment of the present invention also includes: instructions or programs stored in the memory 105 and executable on the processor 104. The processor 104 calls the instructions or programs in the memory 105 to execute the methods executed by the modules shown in FIG5 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0562] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned information receiving method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0563] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0564] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned information sending method embodiment or the various processes of the above-mentioned information receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0565] 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.

[0566] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned information sending method embodiment or the various processes of the above-mentioned information receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0567] An embodiment of the present application further provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the information sending method described above, and the network-side device can be used to execute the steps of the information receiving method described above.

[0568] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0569] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0570] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for sending information, wherein: include: When a first condition related to the wireless link is met, the terminal records first information related to the non-terrestrial network NTN; The terminal sends the first information to the network side device.

2. The method according to claim 1, wherein The first condition includes at least one of the following: The terminal detects a wireless link failure; Cell handover failed; The cell handover is successful; The terminal satisfies at least one of the following conditions: The serving cell of the terminal is an NTN cell; The target cell for cell handover performed by the terminal is the NTN cell.

3. The method according to claim 1 or 2, wherein: The first information includes at least one of the following: a handover execution condition corresponding to the conditional handover candidate cell, the handover execution condition being related to at least one of a first condition event and a second condition event, the first condition event being a condition event related to location, and the second condition event being a condition event related to time; a distance between the terminal and a first reference location, where the first reference location is related to a serving cell of the terminal; a distance between the terminal and a second reference location, the second reference location being related to a candidate cell for conditional handover; a distance between the terminal and a third reference location, where the third reference location is related to a neighboring cell of the serving cell; First time information, where the first time information is used to indicate at least one of a time when a handover configuration is received, a time when a conditional handover is performed, a time when a handover fails, a time when a radio link fails, a time when a radio resource control RRC connection reestablishment is performed, a time when the RRC connection reestablishment is completed, and a time when a handover is successful; first indication information, where the first indication information is used to indicate, when a first cell is associated with a third conditional event, whether the first cell satisfies a leaving condition of the third conditional event or does not satisfy the leaving condition of the third conditional event, the first cell being a cell selected by the terminal during the RRC connection reestablishment process, and the third conditional event being a time-related conditional event; a cell identifier of a second cell, the second cell including at least one of the serving cell, the cell where a radio link failure occurs, the cell performing RRC connection reestablishment, the target cell for handover, the neighboring cell, and a candidate cell for conditional handover, the cell identifier including a tracking area code list, the tracking area code list including multiple tracking area codes; second time information, where the second time information is used to indicate at least one of a time when satellite switching and resynchronization are performed and a time when a wireless link fails; third time information, where the third time information is used to indicate a time difference between a time when satellite switching and resynchronization are performed and a time when the radio link fails, where the time when satellite switching and resynchronization are performed is earlier than or later than the time when the radio link fails; Switch failure type; Switch success type; The second indication information is used to indicate at least one of the following: the configuration authorization CG configured by the network for RACH-less switching does not meet the synchronization signal block SSB measurement threshold; the terminal is configured to perform RACH-less switching and the terminal executes at least one of RACH during the switching process.

4. The method according to claim 3, wherein: In a case where the terminal supports radio link failure reporting and supports conditional handover based on location, the terminal records at least one of a distance between the terminal and a first reference location and a distance between the terminal and a second reference location; In a case where the terminal supports radio link failure reporting and supports location-based measurement reporting, the terminal records at least one of a distance between the terminal and a first reference location and a distance between the terminal and a third reference location.

5. The method according to claim 3, wherein: In the case where the first information includes the distance between the terminal and the first reference location, the first reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the first reference position is a reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional handover; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference position is the reference position of the serving cell indicated in the fourth condition event; In a case where the terminal is configured with a first event, the first reference location is a reference location of a serving cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event; In the case where the third cell is associated with a fifth condition event, the terminal determines the first reference position according to a reference position moved by the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position according to a reference position of movement of the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the terminal is configured with a second event, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location, and the first event and the second event are events related to location.

6. The method according to claim 3, wherein: In the case where the first information includes the distance between the terminal and the second reference location, the second reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the second reference position is a reference position of the candidate cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event; In a case where the third cell is associated with a fifth conditional event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location.

7. The method according to claim 3, wherein: In a case where the first information includes the distance between the terminal and the third reference location, the third reference location satisfies any one of the following: In a case where the terminal is configured with a first event, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with a second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; The first event and the second event are location-related events.

8. The method according to claim 3, wherein: Include at least one of the following: The first time information is absolute time; The second time information is absolute time; The third time information is absolute time.

9. The method according to claim 1, wherein The terminal records first information related to the non-terrestrial network NTN, including: The terminal records a signal measurement result of a serving cell of the terminal or determines not to record the signal measurement result of the serving cell of the terminal.

10. The method according to claim 9, wherein: The terminal recording a signal measurement result of a serving cell of the terminal or determining not to record a signal measurement result of a serving cell of the terminal includes: When the difference between the time when the terminal performs satellite handover and resynchronization and the time when the radio link failure occurs is less than or equal to the first time threshold and the time when the satellite handover and resynchronization are performed is earlier than the time when the radio link failure occurs, the terminal determines not to record the signal measurement result of the serving cell; When the difference between the time when the terminal performs satellite switching and resynchronization and the time when the radio link failure occurs is greater than the first time threshold or the time when the satellite switching and resynchronization is performed is later than the time when the radio link failure occurs, the terminal records the signal measurement result of the serving cell.

11. The method according to claim 3 or 9, wherein: Include any of the following: In a case where the time when the terminal performs satellite switching and resynchronization is earlier than the time when the radio link failure occurs, the time when the satellite switching and resynchronization is performed is the time when the terminal actually performs satellite switching and resynchronization; In a case where the time when the terminal performs satellite switching and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite switching and resynchronization is the time when the terminal can perform satellite switching and resynchronization.

12. The method according to claim 3, wherein: In a case where the handover type most recently performed by the terminal is RACH-less handover, the handover failure type includes RACH-less handover failure; In a case where the handover type most recently performed by the terminal is RACH-less handover, the handover success type includes RACH-less handover success.

13. The method according to any one of claims 1 to 12, wherein: The terminal sends the first information to the network side device, including at least one of the following: The terminal sends a radio link failure report to the network side device, where the radio link failure report includes the first information; The terminal sends a successful switching report to the network-side device, where the successful switching report includes the first information.

14. The method according to any one of claims 1 to 12, wherein: The terminal records first information related to the non-terrestrial network NTN, further comprising: If the second condition is met, the terminal records first information related to the non-terrestrial network NTN; The second condition includes at least one of the following: None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold; The terminal is configured to perform RACH-less handover and the terminal performs RACH; When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

15. The method according to claim 14, wherein The method further comprises: The terminal receives a first configuration sent by the network-side device, where the first configuration includes third indication information, and the third indication information is used to instruct the terminal to record the first information when the second condition is met.

16. The method according to any one of claims 1 to 12, wherein: The method further comprises: The terminal stores the first information.

17. A method for receiving information, wherein: include: The network-side device receives first information sent by the terminal, where the first information is related to the NTN and is recorded by the terminal.

18. The method according to claim 17, wherein The first information includes at least one of the following: a handover execution condition corresponding to the conditional handover candidate cell, the handover execution condition being related to at least one of a first condition event and a second condition event, the first condition event being a condition event related to location, and the second condition event being a condition event related to time; a distance between the terminal and a first reference location, where the first reference location is related to a serving cell of the terminal; a distance between the terminal and a second reference location, the second reference location being related to a candidate cell for conditional handover; a distance between the terminal and a third reference location, where the third reference location is related to a neighboring cell of the serving cell; First time information, where the first time information is used to indicate at least one of a time when a handover configuration is received, a time when a conditional handover is performed, a time when a handover fails, a time when a radio link fails, a time when an RRC connection reestablishment is performed, a time when the RRC connection reestablishment is completed, and a time when a handover is successful; first indication information, where the first indication information is used to indicate, when a first cell is associated with a third conditional event, whether the first cell satisfies a leaving condition of the first conditional event or does not satisfy a leaving condition of the third conditional event, the first cell being a cell selected by the terminal during the RRC connection reestablishment process, and the third conditional event being a time-related conditional event; a cell identifier of a second cell, the second cell including at least one of the serving cell, the cell where a radio link failure occurs, the cell performing RRC connection reestablishment, the target cell for handover, the neighboring cell, and a candidate cell for conditional handover, the cell identifier including a tracking area code list, the tracking area code list including multiple tracking area codes; second time information, where the second time information is used to indicate at least one of a time when satellite switching and resynchronization are performed and a time when a wireless link fails; third time information, where the third time information is used to indicate a time difference between a time when satellite switching and resynchronization are performed and a time when the radio link fails, where the time when satellite switching and resynchronization are performed is earlier than or later than the time when the radio link fails; Switch failure type; Switch success type; The second indication information is used to indicate at least one of the following: the CGs configured by the network for RACH-less switching do not meet the SSB measurement threshold; the terminal is configured to perform RACH-less switching and the terminal performs at least one of the RACHs during the switching process.

19. The method according to claim 18, wherein In the case where the first information includes the distance between the terminal and the first reference location, the first reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the first reference position is a reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional handover; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference position is the reference position of the serving cell indicated in the fourth condition event; In a case where the terminal is configured with a first event, the first reference location is a reference location of a serving cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event; In the case where the third cell is associated with a fifth condition event, the terminal determines the first reference position according to a reference position moved by the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position according to a reference position of movement of the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the terminal is configured with a second event, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location, and the first event and the second event are events related to location.

20. The method according to claim 18, wherein In the case where the first information includes the distance between the terminal and the second reference location, the second reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the second reference position is a reference position of the candidate cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event; In a case where the third cell is associated with a fifth conditional event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location.

21. The method according to claim 18, wherein In a case where the first information includes the distance between the terminal and the third reference location, the third reference location satisfies any one of the following: In a case where the terminal is configured with a first event, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with a second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; The first event and the second event are location-related events.

22. The method according to claim 18, wherein Include at least one of the following: The first time information is absolute time; The second time information is absolute time; The third time information is absolute time.

23. The method according to claim 18, wherein Include any of the following: In a case where the time when the terminal performs satellite switching and resynchronization is earlier than the time when the radio link failure occurs, the time when the satellite switching and resynchronization is performed is the time when the terminal actually performs satellite switching and resynchronization; In a case where the time when the terminal performs satellite switching and resynchronization is later than the time when the radio link failure occurs, the time when the terminal performs satellite switching and resynchronization is the time when the terminal can perform satellite switching and resynchronization.

24. The method according to any one of claims 17 to 23, wherein: The network-side device receives first information sent by the terminal, including at least one of the following: The network-side device receives a radio link failure report sent by the terminal, where the radio link failure report includes the first information; The network-side device receives a successful switching report sent by the terminal, where the successful switching report includes the first information.

25. The method according to any one of claims 17 to 23, wherein The method further comprises: The network-side device sends a first configuration to the terminal, where the first configuration includes third indication information, and the third indication information is used to instruct the terminal to record the first information when a second condition is met; The second condition includes at least one of the following: None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold; The terminal is configured to perform RACH-less handover and the terminal performs RACH; When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

26. The method according to any one of claims 17 to 23, wherein The method further comprises: The network-side device optimizes relevant configurations of the terminal's mobility management according to the first information.

27. The method according to any one of claims 17 to 23, wherein: The method further comprises: The network-side device stores the first information.

28. An information sending device, wherein: include: a recording module, configured to record first information related to the non-terrestrial network NTN when a first condition related to the wireless link is met; The sending module is used to send the first information to the network side device.

29. The apparatus according to claim 28, wherein The first condition includes at least one of the following: The terminal detects that the wireless link fails; Cell handover failed; The cell handover is successful; The terminal satisfies at least one of the following conditions: The serving cell of the terminal is an NTN cell; The target cell for cell handover performed by the terminal is the NTN cell.

30. The device according to claim 28 or 29, wherein The first information includes at least one of the following: a handover execution condition corresponding to the conditional handover candidate cell, the handover execution condition being related to at least one of a first condition event and a second condition event, the first condition event being a condition event related to location, and the second condition event being a condition event related to time; a distance between the terminal and a first reference location, where the first reference location is related to a serving cell of the terminal; a distance between the terminal and a second reference location, the second reference location being related to a candidate cell for conditional handover; a distance between the terminal and a third reference location, where the third reference location is related to a neighboring cell of the serving cell; First time information, where the first time information is used to indicate at least one of a time when a handover configuration is received, a time when a conditional handover is performed, a time when a handover fails, a time when a radio link fails, a time when an RRC connection reestablishment is performed, a time when the RRC connection reestablishment is completed, and a time when a handover is successful; first indication information, where the first indication information is used to indicate, when a first cell is associated with a third conditional event, whether the first cell satisfies a leaving condition of the third conditional event or does not satisfy the leaving condition of the third conditional event, the first cell being a cell selected by the terminal during the RRC connection reestablishment process, and the third conditional event being a time-related conditional event; a cell identifier of a second cell, the second cell including at least one of the serving cell, the cell where a radio link failure occurs, the cell performing RRC connection reestablishment, the target cell for handover, the neighboring cell, and a candidate cell for conditional handover, the cell identifier including a tracking area code list, the tracking area code list including multiple tracking area codes; second time information, where the second time information is used to indicate at least one of a time when satellite switching and resynchronization are performed and a time when a wireless link fails; third time information, where the third time information is used to indicate a time difference between a time when satellite switching and resynchronization are performed and a time when the radio link fails, where the time when satellite switching and resynchronization are performed is earlier than or later than the time when the radio link fails; Switch failure type; Switch success type; The second indication information is used to indicate at least one of the following: the configuration authorization CG configured by the network for RACH-less switching does not meet the synchronization signal block SSB measurement threshold; the terminal is configured to perform RACH-less switching and the terminal executes at least one of RACH during the switching process.

31. The device according to claim 30, wherein The recording module is used to: If the terminal supports radio link failure reporting and supports conditional handover based on location, record at least one of a distance between the terminal and a first reference location and a distance between the terminal and a second reference location; In a case where the terminal supports radio link failure reporting and supports location-based measurement reporting, at least one of a distance between the terminal and a first reference location and a distance between the terminal and a third reference location is recorded.

32. The apparatus according to claim 30, wherein In the case where the first information includes the distance between the terminal and the first reference location, the first reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the first reference position is a reference position of the serving cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional handover; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the first reference position is the reference position of the serving cell indicated in the fourth condition event; In a case where the terminal is configured with a first event, the first reference location is a reference location of a serving cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the first reference location is a reference location of the serving cell indicated in the first event; In the case where the third cell is associated with a fifth condition event, the terminal determines the first reference position according to a reference position moved by the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the first reference position according to a reference position of movement of the serving cell, ephemeris information of the serving cell, and an epoch time; In a case where the terminal is configured with a second event, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the first reference position according to a reference position moved by a serving cell, ephemeris information of the serving cell, and an epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location, and the first event and the second event are events related to location.

33. The apparatus according to claim 30, wherein In the case where the first information includes the distance between the terminal and the second reference location, the second reference location satisfies any one of the following: In a case where the third cell is associated with a fourth condition event, the second reference position is a reference position of the candidate cell indicated in the fourth condition event, and the third cell is a candidate cell for conditional switching; In a case where the third cell is associated with the fourth condition event and the handover type most recently performed by the terminal is conditional handover, the second reference position is the reference position of the candidate cell indicated in the fourth condition event; In a case where the third cell is associated with a fifth conditional event, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional switching, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; When the third cell is associated with the fifth conditional event and the handover type most recently performed by the terminal is conditional handover, the terminal determines the second reference position according to the ephemeris information of the candidate cell for conditional handover, the reference position of the candidate cell indicated in the fifth conditional event, and the corresponding epoch time; The fourth conditional event and the fifth conditional event are conditional events related to location.

34. The apparatus according to claim 30, wherein In a case where the first information includes the distance between the terminal and the third reference location, the third reference location satisfies any one of the following: In a case where the terminal is configured with a first event, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with the first event and the connection failure type of the terminal is a radio link failure, the third reference location is a reference location of a neighboring cell indicated in the first event; When the terminal is configured with a second event, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; When the terminal is configured with the second event and the connection failure type of the terminal is a radio link failure, the terminal determines the third reference position according to the ephemeris information of the neighboring cell, the reference position of the neighboring cell indicated in the second event, and the corresponding epoch time; The first event and the second event are location-related events.

35. The apparatus according to any one of claims 28 to 34, wherein The sending module is used for at least one of the following: Sending a radio link failure report to the network side device, where the radio link failure report includes the first information; A successful switching report is sent to the network side device, where the successful switching report includes the first information.

36. The apparatus according to any one of claims 28 to 34, wherein The recording module is further used for: If the second condition is met, recording first information related to the non-terrestrial network NTN; The second condition includes at least one of the following: None of the CGs configured by the network for RACH-less handover meet the SSB measurement threshold; The terminal is configured to perform RACH-less handover and the terminal performs RACH; When the target cell for switching is configured with a third condition event, the fourth time and the time when the terminal performs switching are greater than or equal to the second time threshold, and the fourth time is the earliest time when the terminal can perform switching indicated by the third condition event.

37. An information receiving device, wherein: include: The receiving module is configured to receive first information sent by a terminal, where the first information is related to the NTN and is recorded by the terminal.

38. A terminal, wherein: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the information sending method according to any one of claims 1 to 16 are implemented.

39. A network side device, wherein: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the information receiving method according to any one of claims 17 to 27 are implemented.

40. A readable storage medium, wherein: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the information sending method according to any one of claims 1 to 16, or implements the steps of the information receiving method according to any one of claims 17 to 27.

41. A wireless communication system, wherein: It includes a terminal and a network side device, the terminal can be used to execute the steps of the information sending method as described in any one of claims 1 to 16, and the network side device can be used to execute the steps of the information receiving method as described in any one of claims 17 to 27.

42. A chip, wherein The chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the positioning method according to any one of claims 1 to 16, or to implement the steps of the positioning method according to any one of claims 17 to 27.

43. A computer program / program product, wherein The computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the positioning method according to any one of claims 1 to 16, or to implement the steps of the positioning method according to any one of claims 17 to 27.

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