RLF report sending method and apparatus, RLF report receiving method and apparatus, related device, and medium

Abstract

The present application belongs to the technical field of communications. Disclosed are an RLF report sending method and apparatus, an RLF report receiving method and apparatus, a related device, and a medium. The RLF report sending method comprises: when an RLF occurs, a terminal generating an RLF report, wherein the RLF report comprises first information, which is information related to LTM-based cell handover of the terminal; and the terminal sending the RLF report to a network-side device.

Description

RLF report sending method, receiving method, device, related equipment and medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202410395365.2 filed in China on April 2, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a method for sending and receiving a radio link failure (RLF) report, an apparatus, related equipment, and a medium. Background Art

[0004] Currently, in order to reduce switching delay, L1 or L2-triggered mobility (LTM) has been introduced. The LTM-based cell switching process includes: the base station sends the LTM configuration of at least one candidate cell to the terminal. After receiving the LTM configuration, the terminal performs L1 measurement on the at least one candidate cell based on the LTM configuration and sends the measurement result to the base station through L1 signaling. Then, after receiving the measurement result, the base station determines a cell switching decision based on the measurement result and sends a switching command to the terminal through L2 signaling, so that the terminal switches to a candidate cell.

[0005] However, for LTM-based cell switching, the LTM configuration configured autonomously by the base station or the LTM cell switching decision determined may not be reasonable. Once the base station configures an unreasonable LTM configuration or determines an unreasonable LTM cell switching decision, the probability of unexpected mobility-related events will increase. Summary of the Invention

[0006] The embodiments of the present application provide an RLF report sending method, receiving method, apparatus, related equipment, and medium, which can reduce the probability of occurrence of unexpected mobility-related events.

[0007] In a first aspect, a method for sending an RLF report is provided, which is executed by a terminal. The method includes: in the event of an RLF, the terminal generates an RLF report, the RLF report includes first information, and the first information is information related to the terminal's LTM-based cell switching; the terminal sends the RLF report to a network side device.

[0008] In a second aspect, a RLF report receiving method is provided, which is executed by a network side device. The method includes: the network side device receives an RLF report sent by a terminal, and the RLF report includes first information, which is information related to LTM-based cell switching of the terminal.

[0009] In a third aspect, a RLF report sending device is provided, which includes a generating module and a sending module; the generating module is used to generate an RLF report when an RLF occurs, and the RLF report includes first information, which is information related to the terminal's LTM-based cell switching; the sending module is used to send the RLF report to the network side device.

[0010] In a fourth aspect, a RLF report receiving device is provided, which includes a receiving module; the receiving module is used to receive an RLF report sent by a terminal, and the RLF report includes first information, and the first information is information related to LTM-based cell switching of 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, comprising a processor and a communication interface, wherein the processor is used to generate an RLF report when an RLF occurs, the RLF report including first information, the first information being information related to the LTM-based cell switching of the terminal, and the communication interface being used to send the RLF report 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 the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to receive an RLF report sent by a terminal, the RLF report includes first information, and the first information is information related to the LTM-based cell switching of 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 an embodiment of the present application, in the event of an RLF, the terminal generates an RLF report, the RLF report including first information, the first information being information related to the terminal's LTM-based cell handover; and the terminal sends the RLF report to a network-side device. Through this solution, since the terminal can send the RLF report generated in the event of an RLF to the network-side device, and the RLF report includes information related to the terminal's LTM-based cell handover, the network-side device can perform corresponding operations based on the information related to the terminal's LTM-based cell handover in the RLF report, such as performing LTM configuration or determining an LTM cell handover decision, thereby improving the rationality of the LTM configuration or determining the LTM cell handover decision, thereby reducing the probability of unexpected mobility-related events. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0021] FIG2 is a flowchart of a method for sending an RLF report provided in an embodiment of the present application;

[0022] FIG3 is a flowchart of a method for receiving an RLF report provided in an embodiment of the present application;

[0023] FIG4 is a schematic structural diagram of an apparatus for sending an RLF report provided in an embodiment of the present application;

[0024] FIG5 is a schematic structural diagram of an RLF report receiving apparatus provided in an embodiment of the present application;

[0025] FIG6 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0026] FIG7 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0027] FIG8 is a schematic diagram of the hardware structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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 relevant 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.

[0033] The following, in conjunction with the accompanying drawings, describes in detail the RLF report sending method, receiving method, apparatus, related equipment and medium provided in the embodiments of the present application through some embodiments and their application scenarios.

[0034] Currently, in order to reduce the delay of cell switching, LTM has been introduced. That is, the network pre-configures multiple LTM candidate cells. The source cell uses L2 signaling to instruct the terminal to switch to the appropriate candidate cell based on the L1 measurement results reported by the terminal. Specifically, the cell switching process based on LTM is as follows:

[0035] Switch preparation:

[0036] 1. The terminal sends a measurement report message to the base station;

[0037] 2. After receiving the measurement report message, the base station decides to configure LTM-based cell handover for the terminal and sends a Radio Resource Control (RRC) Reconfiguration message to the terminal. The RRC Reconfiguration message includes the LTM configuration of one or more candidate cells.

[0038] 3. After receiving the RRC Reconfiguration message, the terminal stores the LTM configuration and sends an RRCReconfigurationComplete message to the base station;

[0039] Synchronize in advance:

[0040] 4. (Optionally) before receiving the LTM cell handover command sent by the base station, the terminal performs uplink and downlink synchronization with the candidate cell;

[0041] Switch execution:

[0042] 5. The terminal performs L1 measurement on the configured candidate cells and sends the measurement results to the base station via L1 signaling;

[0043] 6. After receiving the above measurement results, the base station makes a handover decision based on the measurement results and sends an LTM cell handover command to the terminal through the L2 signaling item;

[0044] 7. After receiving the LTM cell handover command, the terminal detaches from the source cell and uses the corresponding target cell configuration; (optionally) and performs a random access procedure (i.e., a Random Access Procedure) on the target cell. If the terminal has performed step 4 above, the random access procedure in step 7 may be omitted.

[0045] Switching completed:

[0046] 8. The terminal sends an RRCReconfigurationComplete message to the base station of the cell to which it is switching to, completing the LTM switching.

[0047] During an LTM-based cell handover, if the terminal needs to perform a random access procedure to complete synchronization with the target cell and then send an RRCReconfigurationComplete message to complete the handover, it is a random access-based handover (RACH-based Handover, RACH-based HO). If the terminal sends an RRCReconfigurationComplete message to the target cell to complete the handover without performing a random access procedure, it is a RACH-less HO (i.e., handover without random access).

[0048] RACH-less HO includes the following implementation methods:

[0049] Implementation method 1: Synchronize in advance:

[0050] 1. The candidate cell sends RACH resources to the source cell;

[0051] 2. The source cell forwards the RACH resources to the terminal;

[0052] 3. The terminal uses the above RACH resources to send a preamble (i.e., a preamble);

[0053] 4. The candidate cell sends the Timing Advance (TA) value to the source cell;

[0054] 5. The source cell indicates the above TA value in the LTM cell handover command.

[0055] Implementation method 2: Terminal autonomously updates TA:

[0056] 1. The network indicates to the terminal which cell pairs {source cell, target cell} can support the terminal to autonomously update the TA;

[0057] 2. After receiving the LTM cell handover command, if the target cell supports the terminal to autonomously update the TA, the terminal can calculate the TA of the target cell based on the reference signal time difference between the target cell and the source cell, combined with the TA of the source cell.

[0058] Currently, unreasonable measurement report configuration may cause the terminal to fail to report measurement reports in a timely manner, and unreasonable base station decision-making may cause the terminal to fail to switch to the appropriate cell at the appropriate time. These may lead to the occurrence of unexpected mobility-related events. Such unexpected mobility-related events may include at least one of the following:

[0059] Too Late Handover: The terminal stays in the source cell for too long, resulting in RLF, and attempts to reestablish RRC in a cell other than the source cell.

[0060] Too Early Handover: A terminal experiences RLF very soon after successfully switching to a target cell, or during the switching process, and attempts to reestablish RRC on the source cell.

[0061] Handover to Wrong Cell: A terminal experiences RLF very shortly after successfully switching to a target cell, or during the handover process, and attempts RRC reestablishment in a cell other than the source cell and target cell of the previous handover.

[0062] However, for LTM-based cell switching, the LTM configuration configured autonomously by the base station or the LTM cell switching decision determined may not be reasonable. Once the base station configures an unreasonable LTM configuration or determines an unreasonable LTM cell switching decision, the probability of unexpected mobility-related events will increase. For example, the base station configures an inappropriate LTM candidate cell, or selects an inappropriate cell based on the terminal's measurement results, or the RACH-less HO configures an unreasonable autonomous TA target cell, and the terminal fails to autonomously update the TA on the target cell, and ultimately does not receive feedback from the RRCReconfigurationComplete message, all of which will lead to the occurrence of unexpected mobility-related events.

[0063] To address the above issues, embodiments of the present application provide an RLF report sending method, receiving method, apparatus, related equipment, and medium. The RLF report sending method and RLF report receiving method provided in embodiments of the present application can be applied in scenarios where a base station performs LTM configuration or determines an LTM cell handover decision.

[0064] In the RLF report sending method provided in an embodiment of the present application, in the event of an RLF, the terminal generates an RLF report, the RLF report including first information, the first information being information related to the cell switching of the terminal based on LTM; and the terminal sends the RLF report to the network-side device. Through this solution, since the terminal can send the RLF report generated in the event of an RLF to the network-side device, and the RLF report includes information related to the cell switching of the terminal based on LTM, the network-side device can perform corresponding operations based on the information related to the cell switching of the terminal based on LTM in the RLF report, such as performing LTM configuration or determining LTM cell switching decisions, thereby improving the rationality of the LTM configuration or determining LTM cell switching decisions, thereby reducing the probability of unexpected mobility-related events, and improving LTM performance and terminal experience.

[0065] The embodiment of the present application provides a method for sending an RLF report, and Figure 2 shows a flowchart of the method for sending an RLF report provided by the embodiment of the present application. As shown in Figure 2, the method for sending an RLF report provided by the embodiment of the present application may include the following steps 201 and 202.

[0066] Step 201: When RLF occurs, the terminal generates an RLF report.

[0067] The RLF report includes first information, which is information related to LTM-based cell switching of the terminal.

[0068] Optionally, in an embodiment of the present application, the above-mentioned first information can be used by the network side device to configure LTM configuration or determine LTM cell switching decision.

[0069] Optionally, in this embodiment of the present application, the first information may include at least one of the following 1.1 to 1.7:

[0070] 1.1. Measurement results for the first cell, which is the last serving cell of the terminal before the RLF occurs;

[0071] 1.2. Measurement results of at least one candidate cell configured with LTM;

[0072] 1.3. Measurement results for neighboring cells that are not configured with LTM;

[0073] 1.4. Identification information, which is used to indicate the cell pair that supports the terminal to update the TA based on measurement;

[0074] 1.5. First indication information, where the first indication information is used to indicate to the terminal whether the TA has been updated based on the measurement or whether the TA has not been updated based on the random access procedure;

[0075] 1.6. Second indication information, where the second indication information is used to indicate that the reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on the random access procedure;

[0076] 1.7. Handover type information: The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

[0077] Optionally, in the embodiment of the present application, the above measurement results may include L1 measurement results.

[0078] Optionally, in an embodiment of the present application, the above-mentioned first cell may also be referred to as the last serving cell.

[0079] Optionally, in an embodiment of the present application, when the above-mentioned first information includes the above-mentioned 1.2 (i.e., the measurement results of at least one candidate cell configured with LTM configuration) and the above-mentioned 1.3 (i.e., the measurement results of the neighboring cells not configured with LTM configuration), an indication information may be included in each measurement result, and the indication information is used to indicate whether the measurement cell corresponding to the measurement result is configured with LTM configuration.

[0080] Optionally, in the embodiment of the present application, the at least one candidate cell may include at least one of the following:

[0081] Candidate cells configured by network-side equipment;

[0082] Some or all of the candidate cells that the terminal can measure.

[0083] Optionally, in an embodiment of the present application, when the at least one candidate cell includes a candidate cell configured by a network-side device, the LTM configuration of the at least one candidate cell may be sent by the network-side device to the terminal through an RRCReconfiguration message.

[0084] Optionally, in an embodiment of the present application, before generating the above-mentioned RLF report, the terminal may first perform L1 measurement on the at least one candidate cell according to the LTM configuration of the at least one candidate cell, and send the measurement result to the network side device through L1 signaling.

[0085] Optionally, in the embodiment of the present application, the candidate cell that can be measured by the terminal is a candidate cell that the terminal can measure.

[0086] In an embodiment of the present application, since the above-mentioned at least one candidate cell may include a candidate cell configured by a network-side device and at least one of some or all of the candidate cells that can be measured by the terminal, the terminal can perform measurements on different candidate cells, thereby improving the flexibility of measuring candidate cells.

[0087] Optionally, in an embodiment of the present application, the candidate cells measurable by the terminal may be indicated by a network-side device or determined autonomously by the terminal; some or all of the candidate cells may be indicated by a network-side device or determined autonomously by the terminal.

[0088] Optionally, in an embodiment of the present application, the network side device may indicate the candidate cells that can be measured by the terminal, or indicate some or all of the candidate cells, in the LTM configuration of the at least one candidate cell sent to the terminal.

[0089] In an embodiment of the present application, since the candidate cells that can be measured by the above-mentioned terminal can be indicated by the network side device or determined by the terminal independently, and some or all of the above-mentioned candidate cells can also be indicated by the network side device or determined by the terminal independently, measurements can be performed on different candidate cells through the indication of the network side device or the autonomous decision of the terminal, thereby further improving the flexibility of measuring candidate cells.

[0090] Optionally, in the embodiment of the present application, the terminal may perform measurement on at least one of the at least one candidate cell and the neighboring cell according to a measurement strategy, and the measurement strategy may include at least one of the following:

[0091] If the network side device sends the LTM configuration of the at least one candidate cell to the terminal, the terminal performs measurement on the at least one candidate cell;

[0092] If the LTM configuration of the at least one candidate cell sent by the network side device to the terminal includes a first indication (for example, a per LTM-config indication), the terminal performs measurement on all measurable candidate cells;

[0093] If the LTM configuration of the at least one candidate cell sent by the network side device to the terminal includes a second indication (eg, a per LTM-Candidate indication), the terminal performs measurement on some of the measurable candidate cells.

[0094] It can be understood that when the at least one candidate cell includes some of the candidate cells that can be measured by the terminal, the measurement behavior of the terminal can be reduced, thereby saving the power consumption of the terminal.

[0095] Optionally, in an embodiment of the present application, the above identification information may be ltm-ServingCellUE-MeasuredTA-ID.

[0096] Optionally, in an embodiment of the present application, the first indication information may be 1 bit (ie, bit), which may indicate that the terminal has updated the TA based on measurement or has not updated the TA based on the random access process.

[0097] In the embodiment of the present application, since the above-mentioned first information may include at least one of the above-mentioned 1.1 to 1.7, when RLF occurs, the terminal can flexibly generate an RLF report according to the scenario in which the RLF occurs to feedback different first information to the network side device.

[0098] Optionally, in an embodiment of the present application, the above-mentioned step 201 can be specifically implemented through the following step 201a, step 202b or step 201c.

[0099] Step 201a: When no LTM cell handover command is received and RLF occurs, the terminal generates an RLF report.

[0100] Optionally, in an embodiment of the present application, the above-mentioned LTM cell switching command is used to instruct the terminal to perform LTM cell switching.

[0101] Optionally, in an embodiment of the present application, the terminal does not receive the above-mentioned LTM cell switching command and RLF occurs, which can be understood as: the terminal occurs RLF before receiving the LTM cell switching command; for example, when timer T310 times out, the terminal generates the above-mentioned RLF report with the failure type being RLF.

[0102] Step 201b: When receiving the LTM cell handover command and not receiving the first feedback information, the terminal generates an RLF report.

[0103] The first feedback information is the feedback information of the RRC reconfiguration completion message.

[0104] Optionally, in an embodiment of the present application, after receiving the above-mentioned LTM cell switching command, the terminal can determine that the target cell supports the terminal to autonomously update the TA information according to the terminal configured by the network side device, and after autonomously updating the TA, send an RRC reconfiguration completion message to the network side device. If the terminal has not received the feedback information of the RRC reconfiguration completion message (i.e., the above-mentioned first feedback information) until the timer T304 times out, the terminal generates the above-mentioned RLF report with a failure type of HOF.

[0105] Step 201c: When LTM-based cell handover is completed and RLF occurs, the terminal generates an RLF report.

[0106] Optionally, in an embodiment of the present application, after receiving the above-mentioned LTM cell switching command, the terminal completes the LTM-based cell switching. If an RLF failure occurs within a short time (for example, when timer T310 times out), the above-mentioned RLF report with the failure type of RLF is generated.

[0107] In the embodiment of the present application, since the terminal can generate the above-mentioned RLF report under different conditions according to different scenarios in which RLF occurs, the flexibility of generating the RLF report can be improved.

[0108] Optionally, in an embodiment of the present application, step 201 is implemented by step 201a, step 202b, or step 201c. For example, the first information may include a measurement result of the first cell (i.e., step 1.1 above); or, the first information may include a measurement result of the first cell and a first measurement result.

[0109] The first cell is the last serving cell of the terminal before the RLF occurs; the first measurement result includes at least one of the following: a measurement result of at least one candidate cell configured with LTM configuration (i.e., 1.2 above), and a measurement result of a neighboring cell not configured with LTM configuration (i.e., 1.3 above).

[0110] Optionally, in an embodiment of the present application, when the above-mentioned step 201 is implemented through the above-mentioned step 201b, the above-mentioned first information may also include at least one of the above-mentioned identification information, the above-mentioned first indication information and the above-mentioned second indication information.

[0111] Optionally, in an embodiment of the present application, when the above-mentioned step 201 is implemented through the above-mentioned step 201c, the above-mentioned first information may further include the above-mentioned switching type information.

[0112] Step 202: The terminal sends an RLF report to the network-side device.

[0113] Optionally, in an embodiment of the present application, after generating the above-mentioned RLF report, the terminal may send the RLF report including the above-mentioned first information to the network side device, so that the network side device configures the LTM configuration or determines the LTM cell switching decision according to the first information.

[0114] Optionally, in the embodiment of the present application, the above step 202 can be specifically implemented through the following step 202a.

[0115] Step 202a: Upon receiving the first message, the terminal sends an RLF report to the network-side device.

[0116] The first message is used to request to obtain the RLF report generated by the terminal.

[0117] In an embodiment of the present application, since the terminal can send the above-mentioned RLF report to the network side device after receiving the above-mentioned first message, the RLF report can be sent to the network side device again when the network side device requests it, thereby reducing the number of times the RLF report is sent and saving device power consumption.

[0118] In the RLF report sending method provided in the embodiment of the present application, since the terminal can send an RLF report generated in the event of an RLF to the network side device, and the RLF report includes information related to the terminal's LTM-based cell switching, the network side device can perform corresponding operations based on the information related to the terminal's LTM-based cell switching in the RLF report, such as performing LTM configuration or determining LTM cell switching decisions, thereby improving the rationality of the LTM configuration or determining LTM cell switching decisions, thereby reducing the probability of unexpected mobility-related events.

[0119] The embodiment of the present application provides a method for receiving an RLF report, and Figure 3 shows a flowchart of the method for receiving an RLF report provided by the embodiment of the present application. As shown in Figure 3, the method for receiving an RLF report provided by the embodiment of the present application may include the following step 301.

[0120] Step 301: A network-side device receives an RLF report sent by a terminal.

[0121] The RLF report includes first information, which is information related to LTM-based cell switching of the terminal.

[0122] Optionally, in this embodiment of the present application, the first information may include at least one of the following:

[0123] a measurement result of a first cell, where the first cell is the last serving cell of the terminal before the RLF occurs;

[0124] measurement results of at least one candidate cell configured with LTM;

[0125] Measurement results for neighboring cells that are not configured with LTM;

[0126] Identification information, where the identification information is used to indicate a cell pair that supports the terminal updating the TA based on measurement;

[0127] First indication information, where the first indication information is used to indicate that the terminal has updated the TA based on measurement or has not updated the TA based on the random access procedure;

[0128] Second indication information, where the second indication information is used to indicate that a reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on a random access procedure;

[0129] The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

[0130] Optionally, in the embodiment of the present application, the at least one candidate cell may include at least one of the following:

[0131] Candidate cells configured by network-side equipment;

[0132] Some or all of the candidate cells that the terminal can measure.

[0133] Optionally, in an embodiment of the present application, the candidate cells measurable by the terminal may be indicated by a network-side device or determined autonomously by the terminal; some or all of the candidate cells may be indicated by a network-side device or determined autonomously by the terminal.

[0134] In the RLF report receiving method provided in the embodiment of the present application, since the network side device can receive the RLF report sent by the terminal, and the RLF report includes information related to the LTM-based cell switching of the terminal, the network side device can perform corresponding operations based on the information related to the LTM-based cell switching of the terminal in the RLF report, such as performing LTM configuration or determining the LTM cell switching decision, thereby improving the rationality of the LTM configuration or determining the LTM cell switching decision, thereby reducing the probability of occurrence of unexpected mobility-related events.

[0135] Optionally, in an embodiment of the present application, before the above step 301, the RLF report receiving method provided in the embodiment of the present application may further include the following step 302.

[0136] Step 302: The network-side device sends a first message to the terminal.

[0137] The first message is used to request to obtain the RLF report generated by the terminal.

[0138] Optionally, in an embodiment of the present application, after the above step 301, the RLF report receiving method provided in the embodiment of the present application may further include the following step 303.

[0139] Step 303: The network-side device performs a first action based on the RLF report.

[0140] The first behavior includes at least one of the following 2.1 to 2.4:

[0141] 2.1. Adjust the LTM configuration of the candidate cell;

[0142] 2.2. Adjust the LTM-based cell handover strategy;

[0143] 2.3. Adjust the terminal's configuration to update the TA based on the measurement;

[0144] 2.4. Determine whether the terminal switches too early or switches to the wrong cell.

[0145] Optionally, in an embodiment of the present application, if the terminal generates the above-mentioned RLF report without receiving the above-mentioned LTM cell switching command and RLF occurs, the network side device can execute at least one of the above-mentioned 2.1 (i.e., adjusting the LTM configuration of the candidate cell) and 2.2 (i.e., adjusting the LTM-based cell switching strategy) after receiving the RLF report.

[0146] Optionally, in an embodiment of the present application, if the terminal generates the above-mentioned RLF report after receiving the above-mentioned LTM cell switching command and not receiving the above-mentioned first feedback information, the network side device can execute the above-mentioned 2.3 (i.e., adjust the configuration of the terminal based on measurement update TA) after receiving the RLF report.

[0147] Optionally, in an embodiment of the present application, if the terminal generates the above-mentioned RLF report when the LTM-based cell switching is completed and RLF occurs, the network side device can execute the above-mentioned 2.4 (i.e., determine whether the terminal switches too early or switches to the wrong cell) after receiving the RLF report.

[0148] In the embodiment of the present application, since the network side device can perform the above-mentioned first behavior based on the RLF report after receiving the above-mentioned RLF report, the LTM configuration or LTM-related decisions can be optimized, thereby improving the LTM performance and terminal experience.

[0149] Optionally, in the embodiment of the present application, the first information includes the handover type information, and the first action includes determining whether the terminal is handed over too early or handed over to an incorrect cell. Exemplarily, the step 303 can be implemented by the following step 303a.

[0150] Step 303a: The network-side device determines whether the terminal switches too early or switches to an incorrect cell based on the switching type information and the first time threshold.

[0151] Optionally, in the embodiment of the present application, the terminal switches prematurely or switches to an erroneous cell, which can be understood as: after the terminal successfully switches to the target cell (ie, Target cell), an RLF occurs within the first time threshold.

[0152] In the embodiment of the present application, since the network side device can determine whether the terminal switches too early or switches to the wrong cell based on the above-mentioned switching type information and the above-mentioned first time threshold, the accuracy of determining whether the terminal switches too early or switches to the wrong cell can be improved.

[0153] Optionally, in an embodiment of the present application, the first time threshold may be a time threshold related to LTM-based cell switching configured by an operation administration and maintenance (OAM) device.

[0154] Optionally, in an embodiment of the present application, the above-mentioned OAM device can configure the above-mentioned first time threshold specific to LTM to the network side device; for example, the first time threshold can be: a time threshold different from the time threshold of the existing L3-based switching configuration.

[0155] In the embodiment of the present application, since the above-mentioned first time threshold can be a time threshold specific to LTM configured by the OAM device, it can be distinguished from other time thresholds and improve the adaptability to LTM-based cell switching.

[0156] For other descriptions of the embodiments of the present application and the technical effects that can be achieved by each technical feature, please refer to the relevant descriptions in the above-mentioned terminal-side method embodiment. In order to avoid repetition, they will not be repeated here.

[0157] The RLF report sending method provided in the embodiment of the present application may be executed by a RLF report sending device. In the embodiment of the present application, the RLF report sending device performing the RLF report sending method is taken as an example to illustrate the RLF report sending device provided in the embodiment of the present application.

[0158] 4 , an embodiment of the present application provides an RLF report sending device 40 , which may include: a generating module 41 and a sending module 42 .

[0159] The generating module 41 may be configured to generate an RLF report when an RLF occurs, the RLF report including first information related to LTM-based cell handover of the terminal, and the sending module 42 may be configured to send the RLF report to a network-side device.

[0160] In one possible implementation, the above-mentioned first information may include at least one of the following: measurement results of the first cell, which is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM configuration; measurement results of neighboring cells not configured with LTM configuration; identification information, which is used to indicate the cell pair that supports the terminal to update TA based on measurement; first indication information, which is used to indicate that the terminal has updated TA based on measurement or has not updated TA based on the random access process; second indication information, which is used to indicate that the reason for the RLF is that the terminal has updated TA based on measurement or has not updated TA based on the random access process; switching type information, which is used to indicate that the last cell switching of the terminal was a cell switching based on LTM.

[0161] In one possible implementation, the generation module 41 can be specifically used to: generate the above-mentioned RLF report when the LTM cell switching command is not received and RLF occurs; or generate the above-mentioned RLF report when the LTM cell switching command is received and the first feedback information is not received, the first feedback information is the feedback information of the RRC reconfiguration completion message; or generate the above-mentioned RLF report when the LTM-based cell switching is completed and RLF occurs.

[0162] In one possible implementation, the first information may include a measurement result of a first cell; or the first information may include a measurement result of the first cell and a first measurement result. The first cell is the last serving cell of the terminal before the RLF occurs; and the first measurement result includes at least one of the following: a measurement result of at least one candidate cell configured with LTM, and a measurement result of a neighboring cell not configured with LTM.

[0163] In a possible implementation, the at least one candidate cell may include at least one of the following: a candidate cell configured by a network-side device; or some or all of the candidate cells measurable by the terminal.

[0164] In a possible implementation, the candidate cells measurable by the terminal may be indicated by a network device, or may be determined autonomously by the terminal; some or all of the candidate cells may be indicated by a network device, or may be determined autonomously by the terminal.

[0165] In a possible implementation, the sending module 42 may be specifically configured to send the RLF report to the network-side device upon receiving a first message, where the first message is used to request acquisition of the RLF report generated by the terminal.

[0166] In the RLF report sending device provided in the embodiment of the present application, since the RLF report sending device can send the RLF report generated by the terminal when RLF occurs to the network side device, and the RLF report includes information related to the terminal's LTM-based cell switching, the network side device can perform corresponding operations based on the information related to the terminal's LTM-based cell switching in the RLF report, such as performing LTM configuration or determining LTM cell switching decisions, thereby improving the rationality of the LTM configuration or determining LTM cell switching decisions, thereby reducing the probability of occurrence of mobility-related unexpected events.

[0167] The RLF report sending apparatus in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal. Exemplarily, the terminal can include, but is not limited to, the types of terminal 11 listed above, and is not specifically limited in the embodiments of the present application.

[0168] The RLF report sending device provided in the embodiment of the present application can implement the various processes implemented in the above-mentioned terminal side method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0169] The RLF report receiving method provided in the embodiment of the present application may be executed by a RLF report receiving apparatus. In the embodiment of the present application, the RLF report receiving apparatus performing the RLF report receiving method is taken as an example to illustrate the RLF report receiving apparatus provided in the embodiment of the present application.

[0170] In conjunction with FIG5 , an embodiment of the present application provides an RLF report receiving apparatus 50 , which may include a receiving module 51 .

[0171] The receiving module 51 may be configured to receive an RLF report sent by a terminal, where the RLF report includes first information, and the first information is information related to LTM-based cell switching of the terminal.

[0172] In one possible implementation, the above-mentioned first information may include at least one of the following: measurement results of the first cell, which is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM configuration; measurement results of neighboring cells not configured with LTM configuration; identification information, which is used to indicate the cell pair that supports the terminal to update TA based on measurement; first indication information, which is used to indicate that the terminal has updated TA based on measurement or has not updated TA based on the random access process; second indication information, which is used to indicate that the reason for the RLF is that the terminal has updated TA based on measurement or has not updated TA based on the random access process; switching type information, which is used to indicate that the last cell switching of the terminal was a cell switching based on LTM.

[0173] In a possible implementation, the at least one candidate cell may include at least one of the following: a candidate cell configured by a network-side device; or some or all of the candidate cells measurable by the terminal.

[0174] In a possible implementation, the candidate cells measurable by the terminal may be indicated by a network device, or may be determined autonomously by the terminal; some or all of the candidate cells may be indicated by a network device, or may be determined autonomously by the terminal.

[0175] In a possible implementation, the RLF report receiving apparatus 50 may further include a sending module. The sending module may be configured to send a first message to the terminal before the receiving module 51 receives the RLF report sent by the terminal, the first message being used to request acquisition of the RLF report generated by the terminal.

[0176] In one possible implementation, the RLF report receiving apparatus 50 may further include an execution module. The execution module may be configured to, after the receiving module 51 receives the RLF report sent by the terminal, execute a first action based on the RLF report. The first action may include at least one of the following: adjusting the LTM configuration of the candidate cell; adjusting the LTM-based cell handover strategy; adjusting the configuration of the terminal's measurement-based update (TA); or determining whether the terminal has handed over prematurely or to the wrong cell.

[0177] In one possible implementation, the first information may include the handover type information, and the first action may include determining whether the terminal performs a handover prematurely or switches to an incorrect cell. Exemplarily, the execution module may be configured to determine whether the terminal performs a handover prematurely or switches to an incorrect cell based on the handover type information and the first time threshold.

[0178] In a possible implementation, the first time threshold may be a time threshold related to LTM-based cell switching configured by the OAM device.

[0179] In the RLF report receiving device provided in the embodiment of the present application, since the RLF report receiving device can receive the RLF report sent by the terminal, and the RLF report includes information related to the LTM-based cell switching of the terminal, it is possible to perform corresponding operations based on the information related to the LTM-based cell switching of the terminal in the RLF report, such as performing LTM configuration or determining the LTM cell switching decision, thereby improving the rationality of the LTM configuration or determining the LTM cell switching decision, thereby reducing the probability of occurrence of unexpected mobility-related events.

[0180] The RLF report receiving apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component of the electronic device, such as an integrated circuit or chip. The electronic device may be a device other than a terminal. Exemplarily, the other device may be a server, a network attached storage (NAS), etc., which is not specifically limited in the embodiments of the present application.

[0181] The RLF report receiving device provided in the embodiment of the present application can implement the various processes implemented in the above-mentioned network side device method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0182] As shown in Figure 6, an embodiment of the present application further provides a communication device 100, including a processor 101 and a memory 102. The memory 102 stores a program or instruction that can be run on the processor 101. For example, when the communication device 100 is a terminal, the program or instruction, when executed by the processor 101, implements the various steps of the above-mentioned terminal-side method embodiment and can achieve the same technical effect. When the communication device 100 is a network-side device, the program or instruction, when executed by the processor 101, implements the various steps of the above-mentioned network-side device method embodiment and can achieve the same technical effect. To avoid repetition, they are not described here.

[0183] An embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the above-mentioned terminal-side method embodiment. The processor is used to generate an RLF report in the event of an RLF, and the RLF report includes first information, which is information related to the cell switching of the terminal based on LTM; the communication interface is used to send the RLF report to the network-side device. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 7 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

[0184] The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009 and at least some of the components of the processor 1010.

[0185] Those skilled in the art will appreciate that the terminal 1000 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1010 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG7 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.

[0186] It should be understood that in an embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processor 10041 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 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 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.

[0187] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1001 may transmit the data to the processor 1010 for processing. Furthermore, the RF unit 1001 may send uplink data to the network-side device. Typically, the RF unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0188] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 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 1009 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. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0189] Processor 1010 may include one or more processing units. Optionally, processor 1010 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 1010.

[0190] The processor 1010 may be configured to generate an RLF report when an RLF occurs, the RLF report including first information related to LTM-based cell handover of the terminal 1000. The radio frequency unit 1001 may be configured to send the RLF report to a network-side device.

[0191] In one possible implementation, the above-mentioned first information may include at least one of the following: measurement results of the first cell, which is the last serving cell of the terminal 1000 before the RLF occurs; measurement results of at least one candidate cell configured with LTM configuration; measurement results of neighboring cells not configured with LTM configuration; identification information, which is used to indicate the cell pair that supports the terminal 1000 to update the TA based on measurement; first indication information, which is used to indicate that the terminal 1000 has updated the TA based on measurement or has not updated the TA based on the random access process; second indication information, which is used to indicate that the reason for the RLF is that the terminal 1000 has updated the TA based on measurement or has not updated the TA based on the random access process; switching type information, which is used to indicate that the last cell switching of the terminal 1000 is a cell switching based on LTM.

[0192] In one possible implementation, the processor 1010 can be specifically used to: generate the above-mentioned RLF report when the LTM cell switching command is not received and RLF occurs; or generate the above-mentioned RLF report when the LTM cell switching command is received and the first feedback information is not received, the first feedback information is the feedback information of the RRC reconfiguration completion message; or generate the above-mentioned RLF report when the LTM-based cell switching is completed and RLF occurs.

[0193] In one possible implementation, the first information may include a measurement result of a first cell; or the first information may include a measurement result of the first cell and a first measurement result. The first cell is the last serving cell of the terminal 1000 before the RLF occurs; and the first measurement result includes at least one of the following: a measurement result of at least one candidate cell configured with LTM, and a measurement result of a neighboring cell not configured with LTM.

[0194] In a possible implementation, the at least one candidate cell may include at least one of the following: a candidate cell configured by a network-side device; or some or all of the candidate cells that can be measured by the terminal 1000 .

[0195] In one possible implementation, the candidate cells that the terminal 1000 can measure may be indicated by a network-side device, or may be determined independently by the terminal 1000; some or all of the candidate cells may be indicated by a network-side device, or may be determined independently by the terminal 1000.

[0196] In a possible implementation, the radio frequency unit 1001 may be specifically configured to send the RLF report to the network side device upon receiving a first message, where the first message is used to request acquisition of the RLF report generated by the terminal.

[0197] In the terminal provided in the embodiment of the present application, since the terminal can send an RLF report generated in the event of RLF to the network side device, and the RLF report includes information related to the terminal's LTM-based cell switching, the network side device can perform corresponding operations based on the information related to the terminal's LTM-based cell switching in the RLF report, such as performing LTM configuration or determining LTM cell switching decisions, thereby improving the rationality of the LTM configuration or determining LTM cell switching decisions, thereby reducing the probability of unexpected mobility-related events.

[0198] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the above-mentioned terminal side method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0199] An embodiment of the present application also provides a network-side device, 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 aforementioned network-side device method embodiment. The communication interface is configured to receive an RLF report sent by a terminal, wherein the RLF report includes first information related to LTM-based cell handover of the terminal. 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.

[0200] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 8, the network-side device 800 includes an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84, and a memory 85. Antenna 81 is connected to radio frequency device 82. In the uplink direction, radio frequency device 82 receives information via antenna 81 and sends the received information to baseband device 83 for processing. In the downlink direction, baseband device 83 processes the information to be transmitted and sends it to radio frequency device 82. Radio frequency device 82 processes the received information and then sends it through antenna 81.

[0201] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 83 , which includes a baseband processor.

[0202] The baseband device 83 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 8, one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call the program in the memory 85 to execute the network device operations shown in the above method embodiment.

[0203] The network side device may further include a network interface 86, which is, for example, a Common Public Radio Interface (CPR8).

[0204] Specifically, the network side device 800 of the embodiment of the present application also includes: instructions or programs stored in the memory 85 and can be run on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the methods executed by each module shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0205] The radio frequency device 82 may be configured to receive an RLF report sent by a terminal, where the RLF report includes first information, and the first information is information related to LTM-based cell switching of the terminal.

[0206] In one possible implementation, the above-mentioned first information may include at least one of the following: measurement results of the first cell, which is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM configuration; measurement results of neighboring cells not configured with LTM configuration; identification information, which is used to indicate the cell pair that supports the terminal to update TA based on measurement; first indication information, which is used to indicate that the terminal has updated TA based on measurement or has not updated TA based on the random access process; second indication information, which is used to indicate that the reason for the RLF is that the terminal has updated TA based on measurement or has not updated TA based on the random access process; switching type information, which is used to indicate that the last cell switching of the terminal was a cell switching based on LTM.

[0207] In a possible implementation, the at least one candidate cell may include at least one of the following: a candidate cell configured by the network-side device 800; or some or all of the candidate cells measurable by the terminal.

[0208] In one possible implementation, the candidate cells measurable by the terminal may be indicated by the network device 800 or determined autonomously by the terminal; some or all of the candidate cells may be indicated by the network device 800 or determined autonomously by the terminal.

[0209] In a possible implementation, the radio frequency device 82 may be further configured to send a first message to the terminal before receiving the RLF report sent by the terminal. The first message is used to request obtaining the RLF report generated by the terminal.

[0210] In one possible implementation, the processor 84 may be configured to, after the radio frequency device 82 receives the RLF report sent by the terminal, execute a first action based on the RLF report. The first action includes at least one of: adjusting the LTM configuration of the candidate cell; adjusting the LTM-based cell handover strategy; adjusting the configuration of the terminal's measurement-based TA update; and determining whether the terminal performs handover prematurely or to an incorrect cell.

[0211] In one possible implementation, the first information may include the handover type information, and the first action may include determining whether the terminal performs a handover prematurely or switches to an incorrect cell. Exemplarily, the processor 84 may be configured to determine whether the terminal performs a handover prematurely or switches to an incorrect cell based on the handover type information and the first time threshold.

[0212] In a possible implementation, the first time threshold may be a time threshold related to LTM-based cell switching configured by the OAM device.

[0213] In the network side device provided in the embodiment of the present application, since the network side device can receive the RLF report sent by the terminal, and the RLF report includes information related to the LTM-based cell switching of the terminal, the network side device can perform corresponding operations based on the information related to the LTM-based cell switching of the terminal in the RLF report, such as performing LTM configuration or determining the LTM cell switching decision, thereby improving the rationality of the LTM configuration or determining the LTM cell switching decision, thereby reducing the probability of occurrence of mobility-related unexpected events.

[0214] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the above-mentioned network side device method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0215] An embodiment of the present application further 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 RLF report sending method embodiment or the above-mentioned RLF report receiving method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not repeated here.

[0216] 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.

[0217] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor being coupled, and the processor being configured to run a program or instruction to implement the various processes of the above-mentioned RLF report sending method embodiment or the above-mentioned RLF report receiving method embodiment, and to achieve the same technical effect. To avoid repetition, they are not described here.

[0218] 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.

[0219] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-mentioned RLF report sending method embodiment or the above-mentioned RLF report receiving method embodiment, and can achieve the same technical effects. To avoid repetition, they are not described here.

[0220] An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the terminal side method described above, and the network side device can be used to execute the steps of the network side device method described above.

[0221] 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.

[0222] 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.

[0223] 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 a radio link failure (RLF) report, the method comprising: In the event of an RLF, the terminal generates an RLF report, where the RLF report includes first information, where the first information is information related to a cell handover of the terminal based on L1 or L2 triggered mobility LTM; The terminal sends the RLF report to the network side device.

2. The method according to claim 1, wherein The first information includes at least one of the following: a measurement result of a first cell, where the first cell is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM; Measurement results for neighboring cells that are not configured with LTM; Identification information, where the identification information is used to indicate a cell pair that supports the terminal updating a timing advance TA based on measurement; first indication information, where the first indication information is used to indicate to the terminal whether the TA has been updated based on measurement or whether the TA has not been updated based on a random access procedure; Second indication information, where the second indication information is used to indicate that a reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on a random access procedure; The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

3. The method according to claim 1 or 2, wherein: When an RLF occurs, the terminal generates an RLF report, including: When no LTM cell handover command is received and RLF occurs, the terminal generates the RLF report; or, When an LTM cell handover command is received and first feedback information is not received, the terminal generates the RLF report, where the first feedback information is feedback information of a radio resource control RRC reconfiguration complete message; or, When LTM-based cell handover is completed and RLF occurs, the terminal generates the RLF report.

4. The method according to claim 3, wherein: The first information includes a measurement result of the first cell; or the first information includes a measurement result of the first cell and a first measurement result; The first cell is the last serving cell of the terminal before RLF occurs; the first measurement result includes at least one of the following: a measurement result of at least one candidate cell configured with LTM configuration, and a measurement result of a neighboring cell not configured with LTM configuration.

5. The method according to claim 2 or 4, wherein: The at least one candidate cell includes at least one of the following: candidate cells configured by the network side device; Some or all of the candidate cells that can be measured by the terminal.

6. The method according to claim 5, wherein: The candidate cells measurable by the terminal are indicated by the network side device, or are independently determined by the terminal; some or all of the candidate cells are indicated by the network side device, or are independently determined by the terminal.

7. The method according to claim 1, wherein The terminal sending the RLF report to the network side device includes: In case of receiving the first message, the terminal sends the RLF report to the network side device, where the first message is used to request to obtain the RLF report generated by the terminal.

8. A method for receiving an RLF report, the method comprising: A network-side device receives an RLF report sent by a terminal, where the RLF report includes first information, and the first information is information related to LTM-based cell switching of the terminal.

9. The method according to claim 8, wherein The first information includes at least one of the following: a measurement result of a first cell, where the first cell is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM; Measurement results for neighboring cells that are not configured with LTM; Identification information, where the identification information is used to indicate a cell pair that supports measurement-based TA update by the terminal; first indication information, where the first indication information is used to indicate to the terminal whether the TA has been updated based on measurement or whether the TA has not been updated based on a random access procedure; Second indication information, where the second indication information is used to indicate that a reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on a random access procedure; The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

10. The method according to claim 9, wherein: The at least one candidate cell includes at least one of the following: candidate cells configured by the network side device; Some or all of the candidate cells that can be measured by the terminal.

11. The method according to claim 10, wherein: The candidate cells measurable by the terminal are indicated by the network side device, or are independently determined by the terminal; some or all of the candidate cells are indicated by the network side device, or are independently determined by the terminal.

12. The method according to any one of claims 8 to 11, wherein Before the network side device receives the RLF report sent by the terminal, the method further includes: The network-side device sends a first message to the terminal, where the first message is used to request acquisition of an RLF report generated by the terminal.

13. The method according to any one of claims 8 to 11, wherein After the network-side device receives the RLF report sent by the terminal, the method further includes: The network-side device performs a first action based on the RLF report; The first behavior includes at least one of the following: Adjust the LTM configuration of the candidate cell; Adjust LTM-based cell handover strategy; Adjusting the configuration of the terminal for updating the TA based on measurement; Determine whether the terminal is handed over too early or to an incorrect cell.

14. The method according to claim 13, wherein The first information includes the handover type information, and the first behavior includes determining whether the terminal is handed over too early or handed over to an incorrect cell; The network-side device performs a first action based on the RLF report, including: The network side device determines whether the terminal switches too early or switches to an incorrect cell according to the switching type information and the first time threshold.

15. The method according to claim 14, wherein The first time threshold is a time threshold related to LTM-based cell switching configured by an operation, maintenance and management (OAM) device.

16. A RLF report sending device, the device comprising a generating module and a sending module; The generating module is configured to generate an RLF report when an RLF occurs, where the RLF report includes first information, where the first information is information related to LTM-based cell handover of the terminal; The sending module is used to send the RLF report to the network side device.

17. The device according to claim 16, wherein The first information includes at least one of the following: a measurement result of a first cell, where the first cell is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM; Measurement results for neighboring cells that are not configured with LTM; Identification information, where the identification information is used to indicate a cell pair that supports measurement-based TA update by the terminal; first indication information, where the first indication information is used to indicate to the terminal whether the TA has been updated based on measurement or whether the TA has not been updated based on a random access procedure; Second indication information, where the second indication information is used to indicate that a reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on a random access procedure; The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

18. The device according to claim 16 or 17, wherein The generating module is specifically configured to: generate the RLF report when the LTM cell handover command is not received and RLF occurs; or generate the RLF report when the LTM cell handover command is received and the first feedback information is not received, where the first feedback information is feedback information of the RRC reconfiguration complete message; Alternatively, when LTM-based cell switching is completed and RLF occurs, the RLF report is generated.

19. The device according to claim 18, wherein The first information includes a measurement result of the first cell; or the first information includes a measurement result of the first cell and a first measurement result; The first cell is the last serving cell of the terminal before RLF occurs; the first measurement result includes at least one of the following: a measurement result of at least one candidate cell configured with LTM configuration, and a measurement result of a neighboring cell not configured with LTM configuration.

20. The device according to claim 17 or 19, wherein The at least one candidate cell includes at least one of the following: candidate cells configured by the network side device; Some or all of the candidate cells that can be measured by the terminal.

21. The device according to claim 20, wherein The candidate cells measurable by the terminal are indicated by the network side device, or are independently determined by the terminal; some or all of the candidate cells are indicated by the network side device, or are independently determined by the terminal.

22. The apparatus according to claim 16, wherein The sending module is specifically configured to send the RLF report to the network side device upon receiving a first message, where the first message is used to request acquisition of the RLF report generated by the terminal.

23. A RLF report receiving device, the device comprising a receiving module; The receiving module is configured to receive an RLF report sent by a terminal, where the RLF report includes first information, and the first information is information related to LTM-based cell switching of the terminal.

24. The device according to claim 23, wherein The first information includes at least one of the following: a measurement result of a first cell, where the first cell is the last serving cell of the terminal before the RLF occurs; measurement results of at least one candidate cell configured with LTM; Measurement results for neighboring cells that are not configured with LTM; Identification information, where the identification information is used to indicate a cell pair that supports measurement-based TA update by the terminal; first indication information, where the first indication information is used to indicate to the terminal whether the TA has been updated based on measurement or whether the TA has not been updated based on a random access procedure; Second indication information, where the second indication information is used to indicate that a reason for the RLF is that the terminal has updated the TA based on measurement or has not updated the TA based on a random access procedure; The handover type information is used to indicate that the last cell handover of the terminal is an LTM-based cell handover.

25. The apparatus according to claim 24, wherein The at least one candidate cell includes at least one of the following: Candidate cells configured by network-side equipment; Some or all of the candidate cells that can be measured by the terminal.

26. The device according to claim 25, wherein The candidate cells measurable by the terminal are indicated by a network-side device, or are determined autonomously by the terminal; some or all of the candidate cells are indicated by a network-side device, or are determined autonomously by the terminal.

27. The device according to any one of claims 23 to 26, wherein The device also includes a sending module; The sending module is configured to send a first message to the terminal before the receiving module receives the RLF report sent by the terminal, where the first message is used to request acquisition of the RLF report generated by the terminal.

28. The device according to any one of claims 23 to 26, wherein The device also includes an execution module; The execution module is configured to execute a first behavior based on the RLF report after the receiving module receives the RLF report sent by the terminal; The first behavior includes at least one of the following: Adjust the LTM configuration of the candidate cell; Adjust LTM-based cell handover strategy; Adjusting the configuration of the terminal for updating the TA based on measurement; Determine whether the terminal is handed over too early or to an incorrect cell.

29. The apparatus according to claim 28, wherein The first information includes the handover type information, and the first behavior includes determining whether the terminal is handed over too early or handed over to an incorrect cell; The execution module is specifically configured to determine whether the terminal switches too early or switches to an erroneous cell according to the switching type information and the first time threshold.

30. The apparatus according to claim 29, wherein The first time threshold is a time threshold related to LTM-based cell switching configured by the OAM device.

31. A terminal 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 RLF report sending method according to any one of claims 1 to 7 are implemented.

32. A network-side device, 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 RLF report receiving method according to any one of claims 8 to 15 are implemented.

33. A readable storage medium storing a program or instruction, wherein when the program or instruction is executed by a processor, the program or instruction implements the RLF report sending method according to any one of claims 1 to 7, or implements the steps of the RLF report receiving method according to any one of claims 8 to 15.

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