Information transmission method and device, terminal and network equipment

Abstract

The invention provides an information transmission method and device, a terminal and network equipment, and the method is executed by the terminal and comprises the steps: recording first information which comprises at least one of information related to radio link failure (RLF) of satellite transformation and information related to potential problems in a successful satellite transformation process; and sending the first information to network equipment, wherein the first information is used for assisting satellite-related mobile robustness optimization. According to the scheme, at least one of the information related to the RLF of the satellite transformation and the information related to the potential problem in the successful satellite transformation process is recorded, and the recorded information is sent to the network equipment, so that the network side can be assisted to carry out satellite-related mobile robustness optimization, the success rate of the satellite transformation is improved, and the communication reliability is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an information transmission method, apparatus, terminal and network equipment. Background Art

[0002] In the non-terrestrial network (NTN) scenario, satellite switching can be supported without changing the physical cell identifier (PCI). During the satellite switching process, the user equipment (UE) may fail to access the target due to differences in satellite coverage or inappropriate configuration of related parameters. Summary of the Invention

[0003] The embodiments of the present application provide an information transmission method, apparatus, terminal, and network device to avoid the problem of terminal access failure when satellites are changed.

[0004] In order to solve the above technical problems, an embodiment of the present application provides an information transmission method, which is executed by a terminal, comprising:

[0005] Recording first information, wherein the first information includes at least one of information related to a radio link failure (RLF) of a satellite change and information related to potential problems in a successful satellite change process;

[0006] The first information is sent to a network device, where the first information is used to assist in satellite-related mobility robustness optimization.

[0007] Optionally, the information related to the RLF of the satellite transformation includes at least one of the following:

[0008] The most recently triggered action type before the RLF occurs, where the action type includes at least one of the following: satellite change, service link change, feeder link change, and inter-cell handover;

[0009] Information about the length of time from the last satellite change or inter-cell handover triggered before the RLF occurs to the occurrence of the RLF;

[0010] Information about the length of time from when the RLF occurs to when the network device obtains the first information;

[0011] The time from when RLF occurs to when the terminal reconnects to the network;

[0012] When the first condition is met, information of a target object to be accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0013] User identification information corresponding to the cell accessed or attempted to be accessed when the first condition is met;

[0014] The terminal's location information when the satellite change is triggered;

[0015] The location of the terminal when RLF occurs;

[0016] The terminal's location information when the last satellite change or inter-cell handover was triggered before RLF occurred;

[0017] First measurement result information corresponding to the RLF;

[0018] The first condition includes at least one of the following:

[0019] Before satellite change trigger;

[0020] When the satellite changes;

[0021] Before the last satellite change or inter-cell handover is triggered before RLF occurs;

[0022] After the last triggered satellite change or inter-cell handover before RLF occurs;

[0023] After RLF occurs and triggers the RRC connection re-establishment process;

[0024] After RLF occurs;

[0025] After RLF occurs and the triggered RRC connection re-establishment fails.

[0026] Optionally, the first measurement result information includes at least one of the following:

[0027] The measurement results of the target object accessed by the terminal before the satellite change is triggered;

[0028] The measurement results of the neighboring cells of the target object accessed by the terminal before the satellite change is triggered;

[0029] The measurement results of the target object that the terminal attempts to access after the satellite change is triggered;

[0030] The measurement results of the neighboring cells of the target object that the terminal attempts to access after the satellite change is triggered;

[0031] The measurement results of the target object accessed by the terminal when RLF occurs;

[0032] The measurement results of the neighboring cells of the target object accessed by the terminal when the RLF occurs;

[0033] The measurement results of the target object accessed by the terminal before the most recent satellite change or inter-cell handover before the RLF occurs;

[0034] measurement results of the target object of the terminal access before the last satellite switch or inter-cell handover before the RLF occurs;

[0035] measurement results of the target object of the terminal access after the last satellite switch or inter-cell handover before the RLF occurs;

[0036] measurement results of the target object of the terminal access after the last satellite switch or inter-cell handover before the RLF occurs.

[0037] Optionally, the information related to the RLF of the satellite switch further comprises:

[0038] a time length of a common coverage of a source satellite and a target satellite of the terminal during the satellite switch.

[0039] Optionally, in a case where the first information comprises the information related to the RLF of the satellite switch, the first information further comprises at least one of:

[0040] network-configured service cell and neighbor cell service link propagation delay difference configuration information;

[0041] service cell and neighbor cell service link propagation delay difference in the terminal assistance information;

[0042] a time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0043] Optionally, the service cell and neighbor cell service link propagation delay difference configuration information comprises at least one of:

[0044] a service cell and neighbor cell service link propagation delay difference threshold;

[0045] a neighbor cell information list.

[0046] Optionally, the information related to potential problems in the successful satellite switch further comprises at least one of:

[0047] a switch type corresponding to the successful satellite switch, the switch type comprising at least one of: a satellite switch, a service link switch, a feeder link switch, and an inter-cell handover;

[0048] information of a target object of the terminal access before the successful satellite switch, the target object comprising a satellite and / or a cell;

[0049] information of a target object of the terminal access after the successful satellite switch;

[0050] user identification information of a cell accessed by the terminal before the successful satellite switch;

[0051] user identity information corresponding to a cell accessed by the terminal after a successful satellite handover;

[0052] location information of the terminal at a time of a successful satellite handover;

[0053] time length information from a time point of a successful satellite handover to a time point of obtaining the first information by the network device;

[0054] a cause of a potential problem in a successful satellite handover process;

[0055] second measurement result information corresponding to a successful satellite handover.

[0056] Optionally, the second measurement result information comprises at least one of:

[0057] a measurement result of a target object accessed by the terminal before a successful satellite handover;

[0058] a measurement result of a neighbor cell of a target object accessed by the terminal before a successful satellite handover;

[0059] a measurement result of a target object accessed by the terminal after a successful satellite handover;

[0060] a measurement result of a neighbor cell of a target object accessed by the terminal after a successful satellite handover;

[0061] wherein the target object comprises at least one of: a satellite, a cell.

[0062] Optionally, recording information related to a potential problem in a successful satellite handover process comprises:

[0063] recording information related to a potential problem in a successful satellite handover process in a case where a second condition is met;

[0064] wherein the second condition comprises at least one of:

[0065] a ratio of a current value of a target timer to a configured value is greater than or equal to a ratio threshold of the target timer when synchronization of a target satellite or a target cell is obtained;

[0066] an absolute value of a difference between a current value of a target timer and a configured value is less than or equal to a difference threshold of the target timer when synchronization of a target satellite or a target cell is obtained;

[0067] a difference between a time point of a stop serving of a source satellite or a source cell and a time point of a successful access by the terminal is less than or equal to a critical stop serving time length;

[0068] a time length from a satellite handover trigger to a time point of successful synchronization of a target satellite or a target cell by the terminal is greater than or equal to a critical access time length.

[0069] Optionally, the method further includes:

[0070] Receive configuration information sent by network devices;

[0071] The configuration information includes at least one of the following:

[0072] The proportional threshold of the target timer;

[0073] The difference threshold of the target timer;

[0074] Length of critical outage time;

[0075] Critical access time length.

[0076] The embodiment of the present application further provides an information transmission method, which is executed by a network device, including:

[0077] receiving first information sent by a terminal;

[0078] The first information is used to assist in satellite-related mobility robustness optimization; the first information includes at least one of information related to radio link failure RLF of satellite transformation and information related to potential problems in a successful satellite transformation process.

[0079] Optionally, the information related to the RLF of the satellite transformation includes at least one of the following:

[0080] The most recently triggered action type before the RLF occurs, where the action type includes at least one of the following: satellite change, service link change, feeder link change, and inter-cell handover;

[0081] Information about the length of time from the last satellite change or inter-cell handover triggered before the RLF occurs to the occurrence of the RLF;

[0082] Information about the length of time from when the RLF occurs to when the network device obtains the first information;

[0083] The time from when RLF occurs to when the terminal reconnects to the network;

[0084] When the first condition is met, information of a target object to be accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0085] User identification information corresponding to the cell accessed or attempted to be accessed when the first condition is met;

[0086] The terminal's location information when the satellite change is triggered;

[0087] The location of the terminal when RLF occurs;

[0088] The terminal's location information when the last satellite change or inter-cell handover was triggered before RLF occurred;

[0089] First measurement result information corresponding to the RLF;

[0090] The first condition includes at least one of the following:

[0091] Before satellite change trigger;

[0092] When the satellite changes;

[0093] Before the last satellite change or inter-cell handover is triggered before RLF occurs;

[0094] After the last triggered satellite change or inter-cell handover before RLF occurs;

[0095] After RLF occurs and triggers the RRC connection re-establishment process;

[0096] After RLF occurs;

[0097] After RLF occurs and the triggered RRC connection re-establishment fails.

[0098] Optionally, the first measurement result information includes at least one of the following:

[0099] The measurement results of the target object accessed by the terminal before the satellite change is triggered;

[0100] The measurement results of the neighboring cells of the target object accessed by the terminal before the satellite change is triggered;

[0101] The measurement results of the target object that the terminal attempts to access after the satellite change is triggered;

[0102] The measurement results of the neighboring cells of the target object that the terminal attempts to access after the satellite change is triggered;

[0103] The measurement results of the target object accessed by the terminal when RLF occurs;

[0104] The measurement results of the neighboring cells of the target object accessed by the terminal when the RLF occurs;

[0105] The measurement results of the target object accessed by the terminal before the most recent satellite change or inter-cell handover before the RLF occurs;

[0106] The measurement results of the neighboring cells of the target object accessed by the terminal before the most recent satellite change or inter-cell handover before the RLF occurs;

[0107] The measurement results of the target object accessed by the terminal after the most recent satellite change or inter-cell handover before the RLF occurs;

[0108] measurement result of a target object of a neighbor cell accessed by the terminal after a last satellite switch or inter-cell handover before the RLF occurs.

[0109] Optionally, the information related to the RLF of the satellite switch further comprises:

[0110] a time length of a common coverage of a source satellite and a target satellite accessed by the terminal during the satellite switch.

[0111] Optionally, in a case that the first information comprises the information related to the RLF of the satellite switch, the first information further comprises at least one of:

[0112] network-configured serving cell and neighbor cell serving link propagation delay difference configuration information;

[0113] serving link propagation delay difference of the serving cell and the neighbor cell in the terminal assistance information;

[0114] time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0115] Optionally, the serving cell and neighbor cell serving link propagation delay difference configuration information comprises at least one of:

[0116] serving link propagation delay difference threshold of the serving cell and the neighbor cell;

[0117] a neighbor cell information list.

[0118] Optionally, the information related to potential problems in the successful satellite switch further comprises at least one of:

[0119] a switch type corresponding to the successful satellite switch, the switch type comprising at least one of: satellite switch, serving link switch, feeder link switch, inter-cell handover;

[0120] information of a target object accessed by the terminal before the successful satellite switch, the target object comprising a satellite and / or a cell;

[0121] information of a target object accessed by the terminal after the successful satellite switch;

[0122] user identification information corresponding to a cell accessed by the terminal before the successful satellite switch;

[0123] user identification information corresponding to a cell accessed by the terminal after the successful satellite switch;

[0124] location information of the terminal at the time of the successful satellite switch;

[0125] a time length of the first information acquired by the successful satellite handover to the network device;

[0126] a cause of a potential problem in the successful satellite handover process;

[0127] second measurement result information corresponding to the successful satellite handover.

[0128] Optionally, the second measurement result information includes at least one of:

[0129] a measurement result of a target object accessed by the terminal before the successful satellite handover;

[0130] a measurement result of a neighbor cell of the target object accessed by the terminal before the successful satellite handover;

[0131] a measurement result of the target object accessed by the terminal after the successful satellite handover;

[0132] a measurement result of a neighbor cell of the target object accessed by the terminal after the successful satellite handover;

[0133] wherein the target object includes at least one of: a satellite, a cell.

[0134] Optionally, the method further includes:

[0135] sending configuration information to the terminal;

[0136] wherein the configuration information includes at least one of:

[0137] a proportion threshold of a target timer;

[0138] a difference threshold of the target timer;

[0139] a critical out-of-service time length;

[0140] a critical access time length.

[0141] Embodiments of the present application also provide a terminal, including a memory, a transceiver, and a processor:

[0142] a memory for storing a computer program; a transceiver for transceiving data under control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0143] recording first information, the first information including at least one of: information related to a radio link failure (RLF) of a satellite handover and information related to a potential problem in a successful satellite handover process;

[0144] sending the first information to a network device, the first information being used to assist satellite-related mobile robustness optimization.

[0145] Optionally, the information related to the satellite switch of the RLF includes at least one of the following:

[0146] a type of an action triggered most recently before the RLF, the type of the action including at least one of the following: satellite switch, serving link switch, feeder link switch, inter-cell handover;

[0147] time length information from when the satellite switch or the inter-cell handover is triggered most recently before the RLF to when the RLF occurs;

[0148] time length information from when the RLF occurs to when the network device acquires the first information;

[0149] time length information from when the RLF occurs to when the terminal re-accesses the network;

[0150] in a case where the first condition is met, information of a target object of access or attempted access, the target object including a satellite and / or a cell;

[0151] in a case where the first condition is met, user identity information corresponding to a cell of access or attempted access;

[0152] position information of the terminal when the satellite switch is triggered;

[0153] position information of the terminal when the RLF occurs;

[0154] position information of the terminal when the satellite switch or the inter-cell handover is triggered most recently before the RLF;

[0155] first measurement result information corresponding to the RLF;

[0156] wherein the first condition includes at least one of the following:

[0157] before the satellite switch is triggered;

[0158] when the satellite switch is triggered;

[0159] before the satellite switch or the inter-cell handover is triggered most recently before the RLF;

[0160] after the satellite switch or the inter-cell handover is triggered most recently before the RLF;

[0161] after the RLF occurs and before a radio resource control (RRC) connection re-establishment procedure is triggered;

[0162] after the RLF occurs;

[0163] after the RLF occurs and after a failure of the RRC connection re-establishment procedure is triggered.

[0164] Optionally, the first measurement result information includes at least one of the following:

[0165] measurement result of a target object that the terminal accesses before satellite transformation;

[0166] measurement result of a neighbor cell of a target object that the terminal accesses before satellite transformation;

[0167] measurement result of a target object that the terminal attempts to access after satellite transformation;

[0168] measurement result of a neighbor cell of a target object that the terminal attempts to access after satellite transformation;

[0169] measurement result of a target object that the terminal accesses when RLF occurs;

[0170] measurement result of a neighbor cell of a target object that the terminal accesses when RLF occurs;

[0171] measurement result of a target object that the terminal accesses before the last satellite transformation or inter-cell handover before RLF occurs;

[0172] measurement result of a neighbor cell of a target object that the terminal accesses before the last satellite transformation or inter-cell handover before RLF occurs;

[0173] measurement result of a target object that the terminal accesses after the last satellite transformation or inter-cell handover before RLF occurs;

[0174] measurement result of a neighbor cell of a target object that the terminal accesses after the last satellite transformation or inter-cell handover before RLF occurs.

[0175] Optionally, the information related to RLF of satellite transformation further comprises:

[0176] a time length during which a source satellite and a target satellite accessed by the terminal during satellite transformation jointly cover.

[0177] Optionally, when the first information comprises information related to RLF of satellite transformation, the first information further comprises at least one of:

[0178] network-configured service cell and neighbor cell service link propagation delay difference configuration information;

[0179] service cell and neighbor cell service link propagation delay difference in terminal assistance information;

[0180] time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0181] Optionally, the service cell and neighbor cell service link propagation delay difference configuration information comprises at least one of:

[0182] a service link propagation delay difference threshold of the serving cell and the neighbor cell;

[0183] a neighbor cell information list.

[0184] Optionally, the information related to potential problems in the successful satellite handover process comprises at least one of:

[0185] a handover type corresponding to the successful satellite handover, the handover type comprising at least one of: satellite handover, service link handover, feeder link handover, inter-cell handover;

[0186] information of a target object accessed by the terminal before the successful satellite handover, the target object comprising at least one of: satellite and cell;

[0187] information of a target object accessed by the terminal after the successful satellite handover;

[0188] user identity information corresponding to a cell accessed by the terminal before the successful satellite handover;

[0189] user identity information corresponding to a cell accessed by the terminal after the successful satellite handover;

[0190] location information of the terminal at the time of the successful satellite handover;

[0191] time length information from the occurrence of the successful satellite handover to the network device obtaining the first information;

[0192] a cause of the potential problems in the successful satellite handover process;

[0193] second measurement result information corresponding to the successful satellite handover.

[0194] Optionally, the second measurement result information comprises at least one of:

[0195] a measurement result of a target object accessed by the terminal before the successful satellite handover;

[0196] a measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite handover;

[0197] a measurement result of a target object accessed by the terminal after the successful satellite handover;

[0198] a measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite handover;

[0199] wherein the target object comprises at least one of: satellite and cell.

[0200] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0201] In the case of meeting the second condition, record information related to potential problems in a successful satellite transformation process;

[0202] The second condition includes at least one of the following:

[0203] When acquiring synchronization of the target satellite or the target cell, the ratio of the current value of the target timer to the configured value is greater than or equal to a ratio threshold of the target timer;

[0204] When acquiring synchronization of the target satellite or the target cell, the absolute value of the difference between the current value of the target timer and the configured value is less than or equal to a difference threshold of the target timer;

[0205] The difference between the time point of the stop serving of the source satellite or the source cell and the time point of the successful access of the terminal is less than or equal to a critical stop serving time length;

[0206] The time length from the satellite transformation trigger to the successful acquisition of synchronization of the target satellite or the target cell by the terminal is greater than or equal to a critical access time length.

[0207] Optionally, the processor configured to read the computer program in the memory is further configured to perform the following operations:

[0208] Receive the configuration information sent by the network device;

[0209] The configuration information includes at least one of the following:

[0210] The ratio threshold of the target timer;

[0211] The difference threshold of the target timer;

[0212] The critical stop serving time length;

[0213] The critical access time length.

[0214] The embodiments of the present application also provide a network device, comprising a memory, a transceiver, and a processor:

[0215] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0216] Receive the first information sent by the terminal through the transceiver;

[0217] The first information is used to assist in satellite-related mobile robustness optimization; and the first information includes at least one of satellite transformation-related radio link failure (RLF) information and information related to potential problems in a successful satellite transformation process.

[0218] Optionally, the information related to the satellite transformation RLF includes at least one of the following:

[0219] a type of action triggered most recently before the RLF, the type of action including at least one of the following: satellite transformation, service link transformation, feeder link transformation, inter-cell handover;

[0220] time length information from when the satellite transformation or inter-cell handover was triggered most recently before the RLF to when the RLF occurred;

[0221] time length information from when the RLF occurred to when the network device obtained the first information;

[0222] time length information from when the RLF occurred to when the terminal re-accessed the network;

[0223] in the case where the first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0224] in the case where the first condition is met, user identity information corresponding to a cell accessed or attempted to be accessed;

[0225] location information of the terminal when the satellite transformation was triggered;

[0226] location information of the terminal when the RLF occurred;

[0227] location information of the terminal when the satellite transformation or inter-cell handover was triggered most recently before the RLF;

[0228] first measurement result information corresponding to the RLF;

[0229] wherein the first condition includes at least one of the following:

[0230] before the satellite transformation is triggered;

[0231] when the satellite transformation is triggered;

[0232] before the satellite transformation or inter-cell handover was triggered most recently before the RLF;

[0233] after the satellite transformation or inter-cell handover was triggered most recently before the RLF;

[0234] after the RLF occurred and before a radio resource control (RRC) connection re-establishment procedure is triggered;

[0235] after the RLF occurred;

[0236] after the RLF occurred and after the RRC connection re-establishment procedure fails;

[0237] Optionally, the first measurement result information includes at least one of the following:

[0238] measurement result of a target object accessed by the terminal before satellite switching;

[0239] measurement result of a neighbor cell of a target object accessed by the terminal before satellite switching;

[0240] measurement result of a target object accessed by the terminal after satellite switching;

[0241] measurement result of a neighbor cell of a target object accessed by the terminal after satellite switching;

[0242] measurement result of a target object accessed by the terminal when RLF occurs;

[0243] measurement result of a neighbor cell of a target object accessed by the terminal when RLF occurs;

[0244] measurement result of a target object accessed by the terminal before the last satellite switching or inter-cell handover before RLF occurs;

[0245] measurement result of a neighbor cell of a target object accessed by the terminal before the last satellite switching or inter-cell handover before RLF occurs;

[0246] measurement result of a target object accessed by the terminal after the last satellite switching or inter-cell handover before RLF occurs;

[0247] measurement result of a neighbor cell of a target object accessed by the terminal after the last satellite switching or inter-cell handover before RLF occurs.

[0248] Optionally, the information related to RLF of satellite switching further comprises:

[0249] a time length of a source satellite and a target satellite accessed by the terminal during satellite switching.

[0250] Optionally, in a case where the first information comprises information related to RLF of satellite switching, the first information further comprises at least one of:

[0251] network-configured service cell and neighbor cell service link propagation delay difference configuration information;

[0252] service cell and neighbor cell service link propagation delay difference in terminal assistance information;

[0253] time offset between uplink synchronization signal blocks (SSBs) of a source satellite and a target satellite.

[0254] Optionally, the service cell and neighbor cell service link propagation delay difference configuration information comprises at least one of:

[0255] a service link propagation delay difference threshold of the serving cell and the neighbor cell;

[0256] a neighbor cell information list.

[0257] Optionally, the information related to potential problems in the successful satellite handover process comprises at least one of:

[0258] a type of the successful satellite handover, the type comprising at least one of: satellite handover, service link handover, feeder link handover, inter-cell handover;

[0259] information of a target object accessed by the terminal before the successful satellite handover, the target object comprising at least one of: satellite and cell;

[0260] information of a target object accessed by the terminal after the successful satellite handover;

[0261] user identification information of a cell accessed by the terminal before the successful satellite handover;

[0262] user identification information of a cell accessed by the terminal after the successful satellite handover;

[0263] location information of the terminal at the time of the successful satellite handover;

[0264] time length information from the occurrence of the successful satellite handover to the network device obtaining the first information;

[0265] a cause of the potential problems in the successful satellite handover process;

[0266] second measurement result information corresponding to the successful satellite handover.

[0267] Optionally, the second measurement result information comprises at least one of:

[0268] a measurement result of a target object accessed by the terminal before the successful satellite handover;

[0269] a measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite handover;

[0270] a measurement result of a target object accessed by the terminal after the successful satellite handover;

[0271] a measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite handover;

[0272] wherein the target object comprises at least one of: satellite and cell.

[0273] Optionally, the processor, configured to read the computer program in the memory, further performs the following operation:

[0274] sending configuration information to a terminal;

[0275] The configuration information includes at least one of the following:

[0276] a ratio threshold of a target timer;

[0277] a difference threshold of a target timer;

[0278] a critical out-of-service time length;

[0279] a critical access time length.

[0280] The embodiment of the present application further provides an information transmission device applied to a terminal, comprising:

[0281] a recording unit configured to record first information, the first information including at least one of information related to satellite transformation wireless link failure (RLF) and information related to potential problems in a successful satellite transformation process;

[0282] a first sending unit configured to send the first information to a network device, the first information being used to assist satellite-related mobile robustness optimization.

[0283] The embodiment of the present application further provides an information transmission device applied to a network device, comprising:

[0284] a first receiving unit configured to receive first information sent by a terminal;

[0285] The first information is used to assist satellite-related mobile robustness optimization; and the first information includes at least one of information related to satellite transformation wireless link failure (RLF) and information related to potential problems in a successful satellite transformation process.

[0286] The embodiment of the present application further provides a processor-readable storage medium, which stores a computer program used to make the processor execute the above method.

[0287] The embodiment of the present application further provides a computer program product, which includes computer instructions used to implement the steps of the above method when executed by a processor.

[0288] The embodiment of the present application has the following beneficial effects:

[0289] The above scheme can assist the network side to perform satellite-related mobile robustness optimization, improve the success rate of satellite transformation, and ensure communication reliability by recording at least one of information related to satellite transformation wireless link failure (RLF) and information related to potential problems in a successful satellite transformation process, and sending the recorded information to a network device. BRIEF DESCRIPTION OF DRAWINGS

[0290] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0291] Figure 1 A structural diagram of a network system suitable for the embodiments of the present application is shown;

[0292] Figure 2 One of the flowcharts of the information transmission method in the embodiments of the present application is shown;

[0293] Figure 3 Another flowchart of the information transmission method in the embodiments of the present application is shown;

[0294] Figure 4 One of the unit schematic diagrams of the information transmission device in the embodiments of the present application is shown;

[0295] Figure 5 A structural diagram of a terminal in the embodiments of the present application is shown;

[0296] Figure 6 Another unit schematic diagram of the information transmission device in the embodiments of the present application is shown;

[0297] Figure 7 A structural diagram of a network device in the embodiments of the present application is shown. DETAILED DESCRIPTION

[0298] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of the present application.

[0299] The terms "first", "second", and the like in the description and in the claims of this application are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the term data herein is not to be construed as a absolute, such that embodiments of the present application described herein, for example, are not necessarily implemented in the order described or in sequential order, but can be practiced in various orders. Also, the use of terms such as "including", "containing", "comprising", "having" and the like are meant to encompass the inclusion of zero or more steps or units, and are not to be construed as implying that the enumerated steps or units must exist in order to fall within the scope of the present application.

[0300] In embodiments of the present application, the term "and / or" describes an associated relationship between associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. In embodiments of the present application, the term "multiple" means two or more, and other quantifiers are similar.

[0301] In embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the exemplary or for example embodiments are presented so as to enable a clear and concise disclosure of the disclosure.

[0302] The related concepts mentioned in the present application are briefly described as follows.

[0303] 1. Related configuration information of NTN

[0304] NTN configuration (NTN-Config): NTN assistance information, which provides parameters required for a UE to access an NTN access of New Radio (NR), including the following information:

[0305] Epoch time (epochTime): indicates the starting time of the validity of the NTN assistance information;

[0306] NTN uplink synchronization validity duration (ntn-UlSyncValidityDuration): the effective duration configured by the network for the NTN assistance information (i.e., the satellite ephemeris and common TA parameters of the serving cell and / or neighboring cells), which indicates the maximum time duration (calculated from epochTime) during which the UE can apply the assistance information without obtaining new assistance information;

[0307] Ephemeris information (ephemerisInfo): satellite ephemeris information, which can be in the format of position and velocity state vector or in the format of orbital parameters;

[0308] Timing advance information (ta-Info): including common TA and related drift related parameters;

[0309] Other information, such as TA reporting switch, time offset, polarization information of uplink and downlink transmission, etc.

[0310] t-Service: indicates the time information of the cell provided by the NTN system to stop covering the current area. This field is applicable to NTN quasi-Earth fixed service link switching and NTN quasi-Earth fixed and Earth moving system feeder link switching.

[0311] NTN neighbor cell configuration list (ntn-NeighCellConfigList): provides a list of NTN neighbor cells, including their ntn-Config, carrier frequency and PCI;

[0312] Reference location (referenceLocation): the reference location of the serving cell provided by the NTN quasi-Earth fixed system, used for location-based measurement initiation in radio resource control idle state (RRC_IDLE) and radio resource control inactive state (RRC_INACTIVE).

[0313] Moving reference location (movingReferenceLocation): the reference location of the serving cell of the NTN Earth moving system at a certain time reference point. Used in the location-based measurement trigger in RRC_IDLE and RRC_INACTIVE. The time reference of this field is indicated by epochTime in the ntn-Config of the serving cell;

[0314] Distance threshold (distanceThresh): distance threshold from the reference location of the serving cell, used for location-based measurement initiation in RRC_IDLE and RRC_INACTIVE;

[0315] sat switch with reSync: provides target satellite parameters required for performing satellite switch and re-synchronization, including NTN assistance information of target satellite, offset between source and target satellite synchronization signal and PBCH blocks (SSBs) required for possible soft satellite switch, and start time of target satellite providing coverage, under the premise that the cell supports unchanged PCI satellite switch.

[0316] rach-less HO related parameters, including related timing advance (TA) and grant information for UE to perform rach-less HO.

[0317] 2. unchanged PCI satellite switch mechanism for NTN, referred to as unchanged PCI mechanism

[0318] For quasi-earth-fixed system in NTN, one satellite will cover a certain fixed geographical area without changing for a period of time until the satellite leaves. When the current serving satellite (satellite 0) leaves and another satellite (satellite 1) takes over, according to reasonable satellite orbit layout and beam design, the cell (Cell 1) that will provide coverage can provide the same coverage as the current serving cell (Cell 0). By serving through the same ground base station, the same service can be provided for the same area by two different satellites, so that the UE connected to the base station can use the same radio resource configuration, and thus the unchanged PCI mechanism can be used, so that the UE does not need to trigger the switching process to switch the serving cell, but only needs to re-acquire the uplink and downlink synchronization with the target satellite, thereby avoiding the transmission of the switching command in the switching process, saving overhead, and reducing the data transmission interruption delay. The unchanged PCI mechanism includes two scenarios:

[0319] hard satellite switch: the serving satellite is switched at a certain fixed time T, the source satellite serves before time T, and the target satellite serves after time T. The terminal stops transmission with the source cell at time T and starts to perform the downlink synchronization process with the target satellite;

[0320] soft satellite switch: the source satellite and the target satellite can provide service / coverage for the same area for a period of time.

[0321] 3. UE's self-organizing network (SON) record reporting

[0322] The UE's SON record reporting includes:

[0323] CEF report: records information about RRC establishment failure / resume failure on the UE side, and sends a result available indication to the network later, and reports relevant record content after receiving a request from the network side;

[0324] Radio link failure / handover failure report (RLF / HOF report): records information about radio link failure / handover failure on the UE side, and sends a result available indication to the network later, and reports relevant record content after receiving a request from the network side;

[0325] Random access report (RA report): records information about random access failure / success on the UE side, and reports relevant record content after receiving a request from the network side later;

[0326] Successful handover report / successful PSCell (addition / change) report (SHR / SPR): records information about successful handover critical failure / successful PSCell addition or change critical failure on the UE side, and sends a result available indication to the network later, and reports relevant record content after receiving a request from the network side;

[0327] The RLF report includes the following contents:

[0328] Measurement results of the last serving cell of the terminal;

[0329] Measurement results of neighboring cells after the terminal confirms handover failure or radio link failure;

[0330] Terminal location information;

[0331] Terminal failure cell identification information, such as cell global identity (CGI) / PCI+frequency point;

[0332] Terminal re-establishment cell identification information;

[0333] UE reporting timer: the duration of the last time the terminal confirms receiving a handover initiation message to connection failure;

[0334] Connection failure reason, handover failure or radio link failure;

[0335] A cell radio network temporary identifier (C-RNTI) used when the terminal connection fails;

[0336] A radio link failure sub-reason, T310 timeout or random access problem or radio link control (RLC) layer reaches maximum retransmission or beam failure recovery failure (BFRF);

[0337] A time duration experienced by the terminal after confirming the connection failure to the terminal reporting the RLF report;

[0338] A tracking area code (TAC) of the connection failure cell;

[0339] Bluetooth (BT) related record results;

[0340] A wireless local area network (WLAN).

[0341] Under the unchanged PCI satellite switching mechanism, a new satellite replaces an old satellite, but due to the differences between satellites, such as position, height, parameter configuration, and the like, the new and old satellites cannot be completely identical in coverage. If there is a coverage drop in some positions, it may cause satellite switching failure or RLF. It is also possible that the network configuration of the NTN parameter is not appropriate, causing the UE to fail to successfully access the target satellite. It is necessary to record relevant failure information to identify the problem by the network and optimize the network to solve it. The embodiments of the present application provide a method for identifying and solving the above problems.

[0342] The embodiments of the present application will be described below with reference to the accompanying drawings. The information transmission method, device, terminal and network equipment provided by the embodiments of the present application can be applied to a wireless communication system. The wireless communication system can be a system using the fifth generation (5th Generation, 5G) mobile communication technology (hereinafter referred to as 5G system), and the skilled in the art can understand that the 5G NR system is only an example and is not limited.

[0343] Referring to Figure 1 , Figure 1 is a structure diagram of a network system to which the embodiments of the present application can be applied, such as Figure 1As shown, it includes a user terminal 11 and a base station 12, wherein the user terminal 11 can be a user equipment (UE), for example, a terminal-side device such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a mobile Internet device (MID), or a wearable device, and it needs to be noted that the specific type of the user terminal 11 is not limited in the embodiments of the present application. The base station 12 can be a base station of 5G and later versions (for example, gNB, 5G NR NB), or a base station in other communication systems, or a node B, and it needs to be noted that the 5G base station is taken as an example in the embodiments of the present application, but the specific type of the base station 12 is not limited.

[0344] The embodiments of the present application provide an information transmission method and device, a terminal and a network device, to avoid the problem of terminal access failure in satellite transformation.

[0345] The method and the device are based on the same application concept, and since the principles of solving problems are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be described herein.

[0346] As shown in the Figure 2 The embodiments of the present application provide an information transmission method, which is executed by a terminal and includes the following steps.

[0347] In step S201, first information is recorded, and the first information includes at least one of information related to a radio link failure (RLF) in satellite transformation and information related to potential problems in a successful satellite transformation process.

[0348] In step S202, the first information is sent to a network device, and the first information is used to assist satellite-related mobile robustness optimization.

[0349] It needs to be noted that, by recording at least one of the information related to the RLF in satellite transformation and the information related to the potential problems in the successful satellite transformation process, and sending the recorded information to the network device, the network side can be assisted to perform satellite-related mobile robustness optimization, the success rate of satellite transformation can be improved, and the communication reliability can be ensured.

[0350] It should be noted that the terminal sending the first information to the network device means that the terminal sends the first information to the corresponding network device that needs to obtain the first information through the satellite, which can be an access network device corresponding to a source satellite of the terminal access. In this case, the terminal needs to first send the first information to the access network device corresponding to the last accessed satellite, and then forward it to the access network device corresponding to the source satellite. Alternatively, when the access network device corresponding to the last accessed satellite and the access network device corresponding to the source satellite are the same device, the forwarding process is not required.

[0351] For example, the network side can perform satellite coverage optimization and / or satellite transformation optimization based on the first information to improve the success rate of satellite transformation.

[0352] It should be noted that the embodiments of the present application can be applied to satellite transformation without changing the physical cell identifier (unchanged PCI) or satellite transformation with changed physical cell identifier (changed PCI).

[0353] It should be noted that the RLF of satellite transformation can include the following scenarios: hard satellite transformation failure, soft satellite transformation failure, and satellite transformation failure soon after success (including hard satellite transformation failure soon after success and soft satellite transformation failure soon after success).

[0354] It should be noted that the potential problem in the successful satellite transformation process can be understood as a satellite transformation that is successful but succeeds in a critical failure case. This case can also be referred to as a critical successful satellite transformation.

[0355] The different cases are described in detail as follows.

[0356] I. RLF of satellite transformation

[0357] Alternatively, in an implementation, the information related to the RLF of satellite transformation includes at least one of the following:

[0358] A101, the type of action triggered most recently before the RLF occurs, including at least one of the following: satellite transformation, service link transformation, feeder link transformation, and inter-cell handover;

[0359] It should be noted that if it is satellite transformation or service link transformation, it is further indicated as hard satellite transformation or soft satellite transformation. The failure cause or connection failure type in the RLF report can be used for recording, or new information can be added for recording.

[0360] A102、time length information from the last time satellite switching or inter-cell handover is triggered to the time when the RLF occurs;

[0361] It should be noted that the information is used to record the time length from triggering satellite switching or inter-cell handover to RLF.

[0362] It should be noted that the time length information can assist the network side to determine whether the RLF is related to the last action of triggering satellite switching or inter-cell handover, and if so, the type of the last action triggered before the RLF is optimized, for example, the last action is satellite switching, inter-cell handover, etc.

[0363] A103、time length information from the time when the RLF occurs to the time when the network device acquires the first information;

[0364] It should be noted that the time length information can assist the network side to acquire the saved context information.

[0365] A104、time length information from the time when the RLF occurs to the time when the terminal re-accesses the network;

[0366] It should be noted that the time length information can assist the network side to determine whether the re-accessed network cell can be used as a target cell for mobile candidates; if the time is too long, it indicates that the re-accessed network has little relationship with the RLF, and cannot be used as a candidate target cell after failure.

[0367] A105、in the case of satisfying a first condition, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0368] For example, the satellite information of the accessed or attempted to be accessed satellite and / or the cell information of the cell are recorded here. The satellite information can be satellite identification or ephemeris information; the cell information can be cell identification information, for example.

[0369] Optionally, the first condition includes at least one of the following:

[0370] A1051、before triggering satellite switching;

[0371] A1052、when satellite switching;

[0372] A1053、before the last time satellite switching or inter-cell handover is triggered before the RLF occurs;

[0373] A1054、after the last time satellite switching or inter-cell handover is triggered before the RLF occurs;

[0374] A1055、after the RLF occurs, and in the process of triggering radio resource control (RRC) connection re-establishment;

[0375] A1056, after the RLF occurs;

[0376] A1057, after the RLF occurs and after the RRC connection reestablishment is triggered and fails.

[0377] It should be noted that the terminal records the information of the target object accessed or attempted to be accessed in different stages of satellite transformation, which can assist the network side to optimize the target cell of satellite transformation, that is, the satellite transformation fails in the process of transforming from the source satellite to the target satellite, and needs to be optimized for the satellite transformation. Satellite transformation failure may be reflected in RLF failure, and the information of the target object accessed by the terminal before and after the RLF failure may need to be recorded. The target object accessed before the RLF occurs may cause the RLF to occur due to unreasonable parameter configuration, and the target object accessed by the terminal in the cell selection process after the RLF occurs may be the current optimal target cell, which can be used as the target cell that should be selected in satellite transformation or inter-cell handover. If the RRC connection reestablishment process is triggered after the RLF occurs, the cell accessed in the RRC connection reestablishment process can also be used as the optimal candidate target cell.

[0378] A106, user identification information corresponding to the cell accessed or attempted to be accessed in the case of satisfying the first condition;

[0379] It should be noted that recording the user identification information corresponding to the cell facilitates the network to identify the specific user and find the user context information maintained by the network.

[0380] A107, location information of the terminal when the satellite transformation is triggered;

[0381] A108, location information of the terminal when the RLF occurs;

[0382] A109, location information of the terminal when the satellite transformation or inter-cell handover is triggered for the last time before the RLF occurs;

[0383] It should be noted that through A107-A109, the terminal records the location information in different stages of satellite transformation, which can assist the network side to judge the specific location where the failure occurs and optimize the mobility of the terminal at a fixed location.

[0384] A110, first measurement result information corresponding to the RLF;

[0385] Optionally, in an implementation, the first measurement result information includes at least one of the following:

[0386] A1101, measurement result of the target object accessed by the terminal before the satellite transformation is triggered;

[0387] A1102, triggering measurement results of neighbor cells of a target object accessed by the terminal before satellite transformation;

[0388] A1103, triggering measurement results of a target object accessed by the terminal after satellite transformation;

[0389] Optionally, since the satellite transformation cell identifier under unchanged PCI can not be changed, the PCI and the frequency point are also not changed, but the terminal can receive beams of source satellites and target satellites which can be different, thus when recording the measurement results corresponding to the source satellites and the target satellites, the measurement results can be recorded respectively, and the difference between the measurement results is reflected by different beams.

[0390] A1104, triggering measurement results of neighbor cells of a target object accessed by the terminal after satellite transformation;

[0391] A1105, triggering measurement results of a target object accessed by the terminal when RLF occurs;

[0392] A1106, triggering measurement results of neighbor cells of a target object accessed by the terminal when RLF occurs;

[0393] A1107, triggering measurement results of a target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0394] A1108, triggering measurement results of neighbor cells of a target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0395] A1109, triggering measurement results of a target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs;

[0396] A1110, triggering measurement results of neighbor cells of a target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs.

[0397] It should be noted that through the reporting of the first measurement results, the network side can be assisted to determine whether the coverage of the target satellite or cell accessed by the terminal is good enough to continue to serve the terminal; if the coverage is not good enough, other target satellites can be selected to continue to serve, or the coverage of the target satellite can be enhanced for optimization.

[0398] Optionally, in an implementation, the information related to the RLF of the satellite transformation further includes:

[0399] A length of time during which the terminal accesses the source satellite and the target satellite together during the satellite transformation.

[0400] Optionally, the time length can be represented by the difference between t-Service-r17 indicating the current cell service end time point in SIB19 and t-ServiceStart-r18 indicating the start time point in the target satellite SatSwitchWithReSync structure.

[0401] It should be noted that this case is applicable to the scenario of soft satellite switching, that is, in the scenario of soft satellite switching, in addition to recording any one of the above A101-A110 information, the terminal can also record the time length of the common coverage of the source satellite and the target satellite during the satellite switching process to assist the network side in optimizing the satellite coverage.

[0402] Optionally, for satellite switching RLF, it can also be caused by improper NTN configuration. The terminal can record the NTN configuration when RLF fails or is critical to fail, so as to optimize the NTN configuration of the network.

[0403] For example, the network configures the ssb-TimeOffset parameter for the terminal through SIB19, which indicates the time interval of the uplink time synchronization SSB of the source satellite and the target satellite. The terminal calculates the measurement time of the target satellite SSB based on the parameter and other parameters in the NTN configuration. If the ssb-TimeOffset parameter is not configured accurately, it will cause the terminal to fail to obtain the uplink synchronization of the target satellite.

[0404] The network configured ssb-TimeOffset parameter is calculated through the propagationDelayDifference parameter in the UEAssistanceInformation message reported by the terminal, which represents the service link propagation delay difference of the serving cell and the neighbor cell. This parameter includes the difference of at most 4 target cells. The terminal reports this value according to the network configuration information propDelayDiffReportConfig. Optionally, the specific format of propDelayDiffReportConfig is as follows:

[0405]

[0406] The network configures propDelayDiffReportConfig to the terminal, wherein threshPropDelayDiff represents a service cell and a neighbor cell service link propagation delay difference threshold, that is, a threshold for triggering reporting, and neighCellInfoList represents up to maxCellNTN (the value is 4) neighbor cells that can be configured. After the terminal receives the configuration, the terminal reports the service cell and the neighbor cell service link propagation delay difference through propagationDelayDifference in the UEAssistanceInformation message when the condition is met, and the network calculates the ssb-TimeOffset parameter and configures the terminal through SIB19.

[0407] It can be seen from the above analysis that if the ssb-TimeOffset parameter is not accurately configured, the terminal cannot obtain uplink synchronization of the target satellite. To correct the ssb-TimeOffset parameter, the parameters involved in the above calculation need to be recorded to find the root cause of the problem.

[0408] Optionally, in an implementation manner of the present application, the first information further includes at least one of the following:

[0409] A21, network-configured service cell and neighbor cell service link propagation delay difference configuration information (propDelayDiffReportConfig);

[0410] Optionally, the service cell and neighbor cell service link propagation delay difference configuration information includes at least one of the following:

[0411] A211, a service cell and a neighbor cell service link propagation delay difference threshold (threshPropDelayDiff);

[0412] A212, a neighbor cell information list (neighCellInfoList);

[0413] Optionally, the neighbor cell information list includes specific configured neighbor cell information.

[0414] A22, a service cell and a neighbor cell service link propagation delay difference (propagationDelayDifference) in terminal assistance information (UEAssistanceInformation);

[0415] A23, a time offset (ssb-TimeOffset) between uplink synchronization signals SSBs of a source satellite and a target satellite.

[0416] It should be noted that by recording at least one of A21-A23, it can be determined whether the network analysis related parameter configuration is accurate, for example, according to the statistical result, the success rate of the terminal in the same position under which configuration is high, and the success rate of which configuration is low, so that more reasonable parameters are configured next time, and the success rate is improved.

[0417] It should be noted that A21-A23 can be recorded in the corresponding report together with any one of A101-A110, or a new report record can be added.

[0418] The different implementation scenarios in this case are illustrated as follows.

[0419] Application Case 1: Failure under hard satellite transformation of unchanged PCI

[0420] After the unchanged PCI satellite transformation is triggered, the terminal tries to access the new satellite. If the new satellite cannot provide effective coverage, the terminal may have RLF. According to the existing implementation, the terminal records the RLF report, which includes the cell identifier of the failed cell, the failure reason RLF, and time information. The network cannot optimize the hard satellite transformation according to the above content after obtaining the RLF report. The RLF report needs to be enhanced to record the failure information under the hard satellite transformation, or other SON reports are used, or a new report is recorded to record the failure information of the hard satellite transformation.

[0421] RLF occurs after the unchanged PCI satellite transformation is triggered. The information to be recorded includes but is not limited to the following content:

[0422] S101, the action type triggered last time before RLF, including but not limited to: satellite transformation, service link transformation, feeder link transformation, and inter-cell handover;

[0423] Optionally, if it is satellite transformation or service link transformation, optionally, further indicating hard satellite transformation or soft satellite transformation. The failure reason or connection failure type in the RLF report can be recorded, or new information can be recorded.

[0424] S102, time length information from the last time satellite transformation or inter-cell handover is triggered before the RLF occurs to the RLF occurs;

[0425] S103, the satellite transformation trigger before, satellite transformation, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, after the RLF occurs, and triggering the radio resource control (RRC) connection re-establishment process after the RLF occurs, and / or after the RLF occurs and after triggering the RRC connection re-establishment failure, the satellite information corresponding to the satellite accessed or attempted to access by the terminal, can be satellite identification or ephemeris information; because the satellite transformation, the cell may not change, the optimization is the coverage of the satellite, and the configuration information of the cell is not involved.

[0426] S104, the location information of the terminal when triggering satellite transformation and / or the location information of the terminal when the RLF occurs;

[0427] S105, the cell identification information of the cell accessed or attempted to access by the terminal before and after the satellite transformation trigger, before the satellite transformation trigger, during the satellite transformation, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, after the RLF occurs, and triggering the radio resource control (RRC) connection re-establishment process after the RLF occurs, and / or after the RLF occurs and after triggering the RRC connection re-establishment failure, the cell identification information of the cell accessed or attempted to access by the terminal; before and after the satellite transformation, the cell accessed by the terminal may also change, so the cell accessed before the satellite transformation trigger and the cell attempted to access after the satellite transformation trigger need to be recorded.

[0428] S106, the user identification information corresponding to the cell accessed or attempted to access by the terminal before and after the satellite transformation trigger, before the satellite transformation trigger, during the satellite transformation, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, the last time before the RLF occurs triggering satellite transformation or inter-cell handover, after the RLF occurs, and triggering the radio resource control (RRC) connection re-establishment process after the RLF occurs, and / or after the RLF occurs and after triggering the RRC connection re-establishment failure, the user identification information corresponding to the cell accessed or attempted to access by the terminal;

[0429] Also as above, on the basis of recording the cell identification information, further, the identification of the user in the cell is recorded. Facilitate the network to identify specific users, find the user context information maintained by the network.

[0430] S107, the time length information from the RLF occurrence to the network device obtaining the recorded information;

[0431] The time length information is used to assist the network in finding the user context information.

[0432] S108, the time length information from the RLF occurrence to the terminal re-accessing the network;

[0433] S109, the first measurement result information corresponding to the RLF, including but not limited to the following contents:

[0434] The measurement result of the target object before the terminal accesses after triggering the satellite transformation;

[0435] The measurement result of the neighboring cell of the target object before the terminal accesses after triggering the satellite transformation;

[0436] The measurement result of the target object after the terminal attempts to access after triggering the satellite transformation;

[0437] The measurement result of the neighboring cell of the target object after the terminal attempts to access after triggering the satellite transformation;

[0438] The measurement result of the target object accessed by the terminal when the RLF occurs;

[0439] The measurement result of the neighboring cell of the target object accessed by the terminal when the RLF occurs;

[0440] The measurement result of the target object accessed by the terminal before the last satellite transformation or inter-cell handover before the RLF occurs;

[0441] The measurement result of the neighboring cell of the target object accessed by the terminal before the last satellite transformation or inter-cell handover before the RLF occurs;

[0442] The measurement result of the target object accessed by the terminal after the last satellite transformation or inter-cell handover before the RLF occurs;

[0443] The measurement result of the neighboring cell of the target object accessed by the terminal after the last satellite transformation or inter-cell handover before the RLF occurs.

[0444] After the network device receives the above recorded information, it can be known according to the time length information from the last triggering of the satellite transformation to the occurrence of the RLF whether the failure is related to the last triggering of the satellite transformation or the handover; if it is related, the satellite transformation or the handover will be optimized, and whether the coverage of the satellite or the cell attempted to be accessed can be well continued to serve the terminal is judged according to the measurement result; if the coverage is not good, other target satellites can be selected to continue to serve, or the coverage of the target satellite is enhanced, and the like.

[0445] Application case two, soft satellite transformation failure of unchanged PCI

[0446] After the unchanged PCI soft satellite switch is triggered, the terminal tries to access the new satellite. If the new satellite cannot provide effective coverage, the terminal can not access the new target satellite. After the old original satellite cannot continue to provide services, the terminal will have RLF, and the terminal records the RLF report, which includes the cell identifier where the failure occurs, the failure reason, and the time information.

[0447] After the network obtains the RLF report, the optimization of the unchanged PCI soft satellite switch cannot be performed according to the above content. The RLF report needs to be enhanced to record the failure information under the soft satellite switch, or other SON reports are used, or new reports are added to record the failure information of the unchanged PCI soft satellite switch.

[0448] The information to be recorded and the application case are the same, and the only difference is that the terminal can optionally record the difference between t-Service-r17 in SIB19, which indicates the end time point of the current cell service, and t-ServiceStart-r18 in the target satellite SatSwitchWithReSync structure, which indicates the start time point, to represent the length of time during which the source satellite and the target satellite jointly cover.

[0449] Application case three, unchanged PCI satellite switch succeeds and then fails soon

[0450] After the unchanged PCI soft satellite switch or hard satellite switch is triggered, the terminal successfully accesses the new satellite or cell, but RLF occurs soon. The terminal records the RLF report, which includes the cell identifier where the failure occurs, the failure reason, and the time information.

[0451] After the network obtains the RLF report, the optimization of the unchanged PCI satellite switch cannot be performed according to the above content. The RLF report needs to be enhanced to record the failure information under the satellite switch, or other SON reports are used, or new reports are added to record the failure information of the unchanged PCI satellite switch.

[0452] The information to be recorded includes but is not limited to the following content:

[0453] S201, the type of the last action triggered before RLF, including but not limited to: satellite switch, service link switch, feeder link switch, and inter-cell handover;

[0454] Optionally, if it is a satellite switch or a service link switch, optionally, it further indicates a hard satellite switch or a soft satellite switch. The failure reason or the connection failure type in the RLF report can be used for recording, or new information can be recorded.

[0455] S202, time length information from the last time when satellite switching or inter-cell handover is triggered before the RLF occurs to the RLF occurs;

[0456] S203, before the satellite switching is triggered, at the time of satellite switching, before the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the RLF occurs, and in the process of triggering the radio resource control (RRC) connection re-establishment after the RLF occurs, after the RRC connection re-establishment is triggered and fails, the satellite information corresponding to the satellite accessed or attempted to be accessed by the terminal after the RLF occurs can be satellite identification or ephemeris information; because the cell may not change under satellite switching, the optimization is the coverage of the satellite, and the configuration information of the cell is not involved.

[0457] S204, location information of the terminal at the time when the satellite switching is triggered and / or location information of the terminal at the time when the RLF occurs;

[0458] S205, before the satellite switching is triggered, at the time of satellite switching, before the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the RLF occurs, and in the process of triggering the radio resource control (RRC) connection re-establishment after the RLF occurs, after the RRC connection re-establishment is triggered and fails, the cell identification information of the cell accessed or attempted to be accessed by the terminal after the RLF occurs; the last time when satellite switching or inter-cell handover is triggered by the terminal before the RLF occurs is recorded, and the cell accessed before the satellite switching or inter-cell handover is triggered and the cell accessed after the satellite switching or inter-cell handover is triggered are recorded;

[0459] S206, before the satellite switching is triggered, at the time of satellite switching, before the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the last time when satellite switching or inter-cell handover is triggered before the RLF occurs, after the RLF occurs, and in the process of triggering the radio resource control (RRC) connection re-establishment after the RLF occurs, after the RRC connection re-establishment is triggered and fails, the user identification information corresponding to the cell accessed or attempted to be accessed by the terminal after the RLF occurs;

[0460] Also based on the recording of the cell identification information, further, the identification of the user in the cell is recorded. This facilitates the network to identify specific users and find the user context information maintained by the network.

[0461] S207, time length information from the RLF occurs to the network device obtaining the recorded information;

[0462] The time length is used to assist the network in finding the user context information.

[0463] S208, information of a length of time from RLF occurrence to terminal reaccessing a network;

[0464] S209, first measurement result information corresponding to RLF, which can include but is not limited to the following contents:

[0465] Measurement result of a satellite and / or cell accessed by a terminal when RLF occurs;

[0466] Measurement result of a neighbor cell of a satellite and / or cell accessed by a terminal when RLF occurs;

[0467] Measurement result of a satellite and / or cell accessed by a terminal before a last satellite switching or inter-cell handover before RLF occurrence;

[0468] Measurement result of a neighbor cell of a satellite and / or cell accessed by a terminal before a last satellite switching or inter-cell handover before RLF occurrence.

[0469] After the network device receives the above recorded information, the length of time from a last satellite switching or handover triggering to satellite switching failure or RLF occurrence can be known, and whether the failure is related to the last satellite switching or handover triggering can be known. If related, the satellite switching or handover can be optimized, and whether the coverage of a satellite or cell accessed by a terminal can be good enough to continue to serve the terminal can be determined according to the measurement result. If the coverage is not good enough, other target satellites can be selected to continue to serve, or the coverage of the target satellite can be enhanced.

[0470] Optionally, the last time mentioned in the embodiments of the present application can also be understood as the last time or the previous time.

[0471] II. Potential problems in a successful satellite switching process

[0472] Optionally, in an implementation manner, the information related to the potential problems in the successful satellite switching process includes at least one of the following:

[0473] B11, a switching type corresponding to the successful satellite switching, the switching type including at least one of the following: satellite switching, service link switching, feeder link switching, inter-cell handover;

[0474] It should be noted that if the satellite switching or the service link switching is a hard satellite switching or a soft satellite switching.

[0475] B12, information of a target object accessed by a terminal before the successful satellite switching, the target object including a satellite and / or a cell;

[0476] For example, satellite information of accessed satellites and / or cell information of accessed cells are recorded. The satellite information can be satellite identification or ephemeris information; the cell information can be cell identification information, for example.

[0477] B13, information of a target object accessed by the terminal after successful satellite switching;

[0478] It should be noted that the terminal records satellite information and cell identification information accessed before and / or after satellite switching, which can assist the network side in judging the scenario of satellite switching, that is, there is a potential problem in the mobility process from the source satellite to the target satellite, and actions need to be taken for the source satellite to the target satellite, for example: optimization for satellite switching.

[0479] B14, user identification information corresponding to a cell accessed by the terminal before successful satellite switching;

[0480] B15, user identification information corresponding to a cell accessed by the terminal after successful satellite switching;

[0481] It should be noted that recording user identification information corresponding to a cell facilitates the network in identifying a specific user and finding user context information maintained by the network.

[0482] B16, location information of the terminal at the time of successful satellite switching;

[0483] It should be noted that by recording the location information, the network side can be assisted in judging the specific location where the potential problem occurs, and the location can be analyzed and optimized.

[0484] B17, time length information from the occurrence of successful satellite switching to the network device obtaining the first information;

[0485] It should be noted that the time length information can assist the network side in finding terminal context information.

[0486] B18, cause of the potential problem in the process of successful satellite switching;

[0487] Optionally, the cause includes but is not limited to at least one of the following: T310 cause, critical stop service of the source satellite or the source cell, and long time to obtain synchronization of the target satellite or the target cell.

[0488] B19, second measurement result information corresponding to successful satellite switching;

[0489] Optionally, the second measurement result information includes at least one of the following:

[0490] B191, measurement result of a target object accessed by the terminal before successful satellite switching;

[0491] B192, measurement result of a neighbor cell of the target object accessed by the terminal after successful satellite switching;

[0492] B193, measurement result of the target object accessed by the terminal after successful satellite switching;

[0493] B194, measurement result of a neighbor cell of the target object accessed by the terminal after successful satellite switching.

[0494] It should be noted that, through the reporting of the second measurement result, the network side can be assisted to determine whether the coverage of the terminal attempting to access the satellite or the cell is good enough to continue to serve the terminal; if the coverage is not good enough, other target satellites can be selected to continue to serve, or the coverage of the target satellite can be enhanced for optimization.

[0495] Optionally, in an implementation, information related to potential problems in the successful satellite switching process is recorded, including:

[0496] In the case of meeting the second condition, the information related to potential problems in the successful satellite switching process is recorded;

[0497] The second condition includes at least one of the following:

[0498] C11, when synchronization of the target satellite or the target cell is acquired, a ratio of a current value of the target timer to a configuration value is greater than or equal to a ratio threshold of the target timer;

[0499] Optionally, the target timer in the embodiment of the application can be a T310 timer.

[0500] In the hard satellite switching or soft satellite switching scenario, RLF will be triggered when the T310 timer times out (that is, when the current value of the T310 timer increases to the T310 configuration value). Whether it is a critical success can be determined according to the ratio of the current value of the T310 timer to the T310 configuration value when the synchronization of the target satellite or the target cell is successfully acquired. In order to complete the above determination, the network device needs to configure the ratio threshold of the T310 to the terminal. When the ratio of the current value of the T310 timer to the T310 configuration value is greater than (corresponding to the mathematical symbol >) or greater than or equal to (corresponding to the mathematical symbol ≥) the T310 ratio threshold when the synchronization of the target satellite or the target cell is successfully acquired, it indicates a critical success.

[0501] C12, when synchronization of the target satellite or the target cell is acquired, an absolute value of a difference between a current value of the target timer and a configuration value is less than or equal to a difference threshold of the target timer;

[0502] In the hard satellite handover or soft satellite handover scenario, RLF is triggered due to T310 timer timeout (i.e. when the current value of T310 timer increases to the configured value of T310). The critical success can be determined according to whether the absolute value of the difference between the current value of T310 timer and the configured value of T310 is critical or not when the terminal successfully acquires synchronization with the target satellite or cell. To determine the above, the network configures a T310 difference threshold to the terminal. When the absolute value of the difference between the current value of T310 timer and the configured value of T310 is less than (corresponding to mathematical symbol <) or greater than or equal to (corresponding to mathematical symbol ≤) the T310 difference threshold, it means critical success.

[0503] C13, the difference between the time point of the stop service of the source satellite or source cell and the time point of the successful access of the terminal is less than or equal to a critical stop service time length;

[0504] It should be noted that in the soft satellite handover scenario, the critical success can also be determined by judging whether the source satellite or source cell has approached the stop service time point when the terminal acquires synchronization with the target satellite or target cell. The meaning is that the source satellite or source cell has approached the stop service, and the terminal has completed the synchronization acquisition with the target satellite or target cell. To determine the above meaning, the critical stop service time length can be configured. If (t-Service (the parameter indicating the stop service time point) of the source cell - current time) is less than or less than or equal to the configured critical stop service time length, it means critical success. Of course, other configurations can also be used to determine the occurrence of the above event, and the specific implementation mode is not limited.

[0505] C14, the time length from the satellite handover trigger to the successful synchronization acquisition of the terminal with the target satellite or target cell is greater than or equal to a critical access time length;

[0506] It should be noted that the time length from the satellite handover trigger to the successful synchronization acquisition of the terminal with the target satellite or target cell can also be used to determine the critical success. The critical access time length can be configured. If the time length from the satellite handover trigger to the successful synchronization acquisition of the terminal with the target satellite or cell is greater than or greater than or equal to the configured critical access time length, it means critical success. Of course, other configurations can also be used to determine that the time length of the synchronization acquisition of the terminal with the target satellite or cell is too long, and the specific implementation mode is not limited.

[0507] Optionally, in an implementation mode, the method further comprises:

[0508] receiving the configuration information sent by the network device;

[0509] The configuration information comprises at least one of the following:

[0510] a ratio threshold of the target timer;

[0511] a difference threshold of the target timer;

[0512] a critical out-of-service time length;

[0513] a critical access time length.

[0514] Optionally, the configuration information can be sent to the terminal through SIB19 or dedicated signaling of the terminal.

[0515] The following illustrates this case as follows.

[0516] Application Case Four: Satellite Transformation Optimization of Critical Successful unchanged PCI

[0517] The critical successful unchanged PCI satellite transformation refers to that the satellite transformation is successful, but there is a critical success situation during the access to the target satellite or cell. In this scenario, the network side needs to first configure configuration information for the terminal to judge whether the critical success occurs, which includes but is not limited to:

[0518] a T310 ratio threshold;

[0519] a T310 difference threshold;

[0520] a critical out-of-service time length, i.e., the judgment information of the critical out-of-service time point of the source satellite or source cell when the terminal acquires synchronization of the target satellite or cell;

[0521] a critical access time length, i.e., the time length information of the successful acquisition of synchronization of the target satellite or target cell.

[0522] The above configuration information can be sent to the terminal through SIB19 or dedicated signaling of the terminal.

[0523] When the terminal successfully acquires synchronization of the target satellite or target cell, it is judged according to the above configuration information whether the critical success occurs. When any condition is met, it is judged that the critical success occurs. The critical success information is recorded, which can be recorded in the SHR report or other SON report or newly added report.

[0524] The information to be recorded includes but is not limited to the following contents:

[0525] S301, the transformation type corresponding to the successful satellite transformation, including but not limited to: satellite transformation, service link transformation, feeder link transformation, and inter-cell handover;

[0526] If it is satellite transformation or service link transformation, optionally, it is further indicated that it is hard satellite transformation or soft satellite transformation.

[0527] S302, the satellite information accessed by the terminal before the successful satellite switching and / or the satellite information accessed by the terminal after the successful satellite switching can be satellite identification or ephemeris information; because the satellite switching, the cell can not change, the satellite coverage needs to be optimized, and the cell configuration information is not involved.

[0528] S303, the location information of the terminal when the successful satellite switching occurs;

[0529] S304, the cell identification information of the cell accessed before the successful satellite switching or inter-cell handover and the cell accessed after the successful satellite switching or inter-cell handover;

[0530] S305, the user identification information corresponding to the cell accessed before the successful satellite switching or inter-cell handover and the cell accessed after the successful satellite switching or inter-cell handover;

[0531] That is, on the basis of recording the cell identification information in S304, further, the identification of the user in the cell is recorded. It is convenient for the network to identify the specific user and find the user context information kept by the network.

[0532] S306, the time length information of the time when the successful satellite switching occurs to the network device acquiring the recorded information;

[0533] The time length information is used to assist the network to find the user context information.

[0534] S307, the reason for the critical successful satellite switching;

[0535] Specifically, but not limited to: T310 reason, source satellite or source cell critical stop service, acquire target satellite or target cell synchronization time is long, etc.

[0536] S308, the second measurement result information, including but not limited to the following contents:

[0537] The measurement result of the satellite and / or cell accessed by the terminal before the successful satellite switching;

[0538] The measurement result of the neighbor cell of the satellite and / or cell accessed by the terminal before the successful satellite switching;

[0539] The measurement result of the satellite and / or cell accessed by the terminal after the successful satellite switching;

[0540] The measurement result of the neighbor cell of the satellite and / or cell accessed by the terminal after the successful satellite switching.

[0541] After the network device receives the recorded information, it can determine whether the terminal can continue to be served well according to the measurement result, whether the coverage of the satellite or the cell is good, and whether the terminal can continue to be served well. If the coverage is not good, other target satellites can be selected to continue to serve, or the coverage of the target satellite can be enhanced, and the like.

[0542] It should be noted that, in the conventional handover, a synchronous RRC reconfiguration message is sent to the terminal, but in the unchanged PCI satellite transformation process, the RRC reconfiguration message is no longer sent to the terminal. The information recorded in the conventional SON report is mostly based on the handover process, that is, the synchronous RRC reconfiguration message, and is no longer applicable to the unchanged PCI satellite transformation process, and the satellite transformation scenario is also different from the conventional handover. In order to complete the optimization of the satellite transformation, at least one embodiment of the present application enhances the recorded information in the RLF and / or critical successful satellite transformation scenarios of the satellite transformation, assists the network side to complete the network optimization of the satellite transformation, and improves the access success rate.

[0543] The technical solutions provided by the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable systems can be global system of mobile communication (GSM) systems, code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) general packet radio service (GPRS) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, long term evolution advanced (LTE-A) systems, universal mobile system (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G new radio (NR) systems, and the like. Among these various systems, there are terminals (which can also be referred to as terminal devices) and network devices. The system can also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), and the like.

[0544] The terminal referred to in the embodiments of the present application can also be referred to as a terminal device, which can refer to a device that provides voice and / or data connectivity to a user, a handheld device having wireless connection capability, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in a 5G system, the terminal device can be referred to as a user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) through a radio access network (RAN), and the wireless terminal device can be a mobile terminal device, such as a mobile phone (or called "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. The wireless terminal device can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present application.

[0545] The network device related to the embodiments of the present application can be a base station, which can include multiple cells serving terminals. According to different application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminal devices through one or more sectors over an air interface, or other names. The network device can be used to exchange received air frames and Internet Protocol (IP) packets as a router between wireless terminal devices and the rest of the access network, which can include an Internet Protocol (IP) communication network. The network device can also coordinate the management of the properties of the air interface. For example, the network device related to the embodiments of the present application can be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (LTE) system, or a 5G base station (gNB) in a next generation system, or a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which are not limited in the embodiments of the present application. In some network structures, the network device can include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit can also be geographically separated.

[0546] The network device and the terminal device can each use one or more antennas for multi-input multi-output (MIMO) transmission, which can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). According to the shape and number of root antenna combinations, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission or precoding transmission or beamforming transmission, etc.

[0547] As shown in Figure 3 The embodiment of the present application provides an information transmission method, which is executed by a network device and comprises the following steps:

[0548] In step S301, first information sent by a terminal is received.

[0549] The first information is used for assisting satellite-related mobile robustness optimization; and the first information comprises at least one of information related to satellite transformation-related radio link failure (RLF) and information related to potential problems in a successful satellite transformation process.

[0550] Optionally, the information related to satellite transformation-related RLF comprises at least one of the following:

[0551] The type of the action triggered most recently before the RLF, wherein the type of the action comprises at least one of the following: satellite transformation, service link transformation, feeder link transformation, and inter-cell handover;

[0552] The time length information from the satellite transformation or inter-cell handover triggered most recently before the RLF to the occurrence of the RLF;

[0553] The time length information from the occurrence of the RLF to the acquisition of the first information by the network device;

[0554] The time length information from the occurrence of the RLF to the re-access of the network by the terminal;

[0555] In the case where the first condition is met, the information of a target object accessed or attempted to be accessed, wherein the target object comprises a satellite and / or a cell;

[0556] In the case where the first condition is met, the user identifier information of a cell accessed or attempted to be accessed;

[0557] The location information of the terminal when the satellite transformation is triggered;

[0558] The location information of the terminal when the RLF occurs;

[0559] Position information of the terminal when the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0560] First measurement result information corresponding to the RLF;

[0561] The first condition comprises at least one of the following:

[0562] Before the satellite switching is triggered;

[0563] When the satellite switching is triggered;

[0564] Before the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0565] After the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0566] After the RLF occurs and before the RRC connection re-establishment procedure is triggered;

[0567] After the RLF occurs;

[0568] After the RLF occurs and after the RRC connection re-establishment is failed to be triggered.

[0569] Optionally, the first measurement result information comprises at least one of the following:

[0570] Measurement result of a target object accessed by the terminal before the satellite switching is triggered;

[0571] Measurement result of a neighbor cell of the target object accessed by the terminal before the satellite switching is triggered;

[0572] Measurement result of a target object attempted to be accessed by the terminal after the satellite switching is triggered;

[0573] Measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after the satellite switching is triggered;

[0574] Measurement result of a target object accessed by the terminal when the RLF occurs;

[0575] Measurement result of a neighbor cell of the target object accessed by the terminal when the RLF occurs;

[0576] Measurement result of a target object accessed by the terminal before the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0577] Measurement result of a neighbor cell of the target object accessed by the terminal before the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0578] Measurement result of a target object accessed by the terminal after the satellite switching or inter-cell handover is triggered last time before the RLF occurs;

[0579] measurement results of the target object of the neighbor cell accessed by the terminal after the last satellite switch or inter-cell handover before the RLF occurs.

[0580] Optionally, the information related to the RLF of the satellite switch further includes:

[0581] a time length of a common coverage of a source satellite and a target satellite accessed by the terminal during the satellite switch.

[0582] Optionally, in a case where the first information includes the information related to the RLF of the satellite switch, the first information further includes at least one of:

[0583] network-configured service link propagation delay difference configuration information of a serving cell and a neighbor cell;

[0584] service link propagation delay difference of the serving cell and the neighbor cell in the terminal assistance information;

[0585] a time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0586] Optionally, the service link propagation delay difference configuration information of the serving cell and the neighbor cell includes at least one of:

[0587] a service link propagation delay difference threshold of the serving cell and the neighbor cell;

[0588] a neighbor cell information list.

[0589] Optionally, the information related to potential problems in the successful satellite switch further includes at least one of:

[0590] a switch type corresponding to the successful satellite switch, the switch type including at least one of: a satellite switch, a service link switch, a feeder link switch, and an inter-cell handover;

[0591] information of a target object accessed by the terminal before the successful satellite switch, the target object including a satellite and / or a cell;

[0592] information of a target object accessed by the terminal after the successful satellite switch;

[0593] user identification information of a cell accessed by the terminal before the successful satellite switch;

[0594] user identification information of a cell accessed by the terminal after the successful satellite switch;

[0595] location information of the terminal at the time of the successful satellite switch;

[0596] time length information from the occurrence of the successful satellite switch to the acquisition of the first information by the network device.

[0597] a cause of a potential problem in a successful satellite handover procedure;

[0598] a second measurement result information corresponding to the successful satellite handover.

[0599] Optionally, the second measurement result information comprises at least one of:

[0600] a measurement result of a target object accessed by the terminal before the successful satellite handover;

[0601] a measurement result of a neighbor cell of the target object accessed by the terminal before the successful satellite handover;

[0602] a measurement result of the target object accessed by the terminal after the successful satellite handover;

[0603] a measurement result of a neighbor cell of the target object accessed by the terminal after the successful satellite handover;

[0604] wherein the target object comprises at least one of: a satellite, a cell.

[0605] Optionally, the method further comprises:

[0606] sending configuration information to the terminal;

[0607] wherein the configuration information comprises at least one of:

[0608] a proportion threshold of a target timer;

[0609] a difference threshold of the target timer;

[0610] a critical out-of-service time length;

[0611] a critical access time length.

[0612] It should be noted that all the implementation manners in the above embodiments are applicable to the embodiments of the information transmission method applied to the network device side, and can achieve the same technical effects, which will not be described herein.

[0613] As shown in Figure 4 the embodiment of the present application provides an information transmission device 400 applied to a terminal, comprising:

[0614] a recording unit 401 configured to record first information, the first information comprising at least one of: information related to a radio link failure (RLF) of a satellite handover and information related to a potential problem in a successful satellite handover procedure;

[0615] a first sending unit 402 configured to send the first information to a network device, the first information being used to assist satellite-related mobile robustness optimization.

[0616] Optionally, the information related to the satellite switch of the RLF includes at least one of the following:

[0617] a type of action triggered most recently before the RLF, the type of action including at least one of the following: satellite switch, serving link switch, feeder link switch, inter-cell handover;

[0618] time length information from when the satellite switch or inter-cell handover is triggered most recently before the RLF to when the RLF occurs;

[0619] time length information from when the RLF occurs to when the network device acquires the first information;

[0620] time length information from when the RLF occurs to when the terminal re-accesses the network;

[0621] in a case where a first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0622] in a case where the first condition is met, user identity information corresponding to a cell accessed or attempted to be accessed;

[0623] position information of the terminal when the satellite switch is triggered;

[0624] position information of the terminal when the RLF occurs;

[0625] position information of the terminal when the satellite switch or inter-cell handover is triggered most recently before the RLF;

[0626] first measurement result information corresponding to the RLF;

[0627] The first condition includes at least one of the following:

[0628] before the satellite switch is triggered;

[0629] when the satellite switch is triggered;

[0630] before the satellite switch or inter-cell handover is triggered most recently before the RLF;

[0631] after the satellite switch or inter-cell handover is triggered most recently before the RLF;

[0632] after the RLF occurs and before a radio resource control (RRC) connection re-establishment procedure is triggered;

[0633] after the RLF occurs;

[0634] after the RLF occurs and after the RRC connection re-establishment procedure fails;

[0635] Optionally, the first measurement information comprises at least one of:

[0636] measurement result of a target object that triggers terminal access before satellite switching;

[0637] measurement result of a neighbor cell of a target object that triggers terminal access before satellite switching;

[0638] measurement result of a target object that triggers terminal access attempt after satellite switching;

[0639] measurement result of a neighbor cell of a target object that triggers terminal access attempt after satellite switching;

[0640] measurement result of a target object that terminal accesses when RLF occurs;

[0641] measurement result of a neighbor cell of a target object that terminal accesses when RLF occurs;

[0642] measurement result of a target object that terminal accesses before the last satellite switching or inter-cell handover before RLF occurs;

[0643] measurement result of a neighbor cell of a target object that terminal accesses before the last satellite switching or inter-cell handover before RLF occurs;

[0644] measurement result of a target object that terminal accesses after the last satellite switching or inter-cell handover before RLF occurs;

[0645] measurement result of a neighbor cell of a target object that terminal accesses after the last satellite switching or inter-cell handover before RLF occurs.

[0646] Optionally, the information related to RLF of satellite switching further comprises:

[0647] time length of a source satellite and a target satellite jointly covering terminal access during satellite switching.

[0648] Optionally, in the case that the first information comprises information related to RLF of satellite switching, the first information further comprises at least one of:

[0649] service link propagation delay difference configuration information of a serving cell and a neighbor cell configured by the network;

[0650] service link propagation delay difference of a serving cell and a neighbor cell in terminal assistance information;

[0651] time offset between uplink synchronization signal blocks (SSBs) of a source satellite and a target satellite.

[0652] Optionally, the serving cell and the neighbor cell service link propagation delay difference configuration information comprises at least one of the following:

[0653] A serving cell and a neighbor cell service link propagation delay difference threshold;

[0654] A neighbor cell information list.

[0655] Optionally, the information related to potential problems in the successful satellite transformation process comprises at least one of the following:

[0656] A transformation type corresponding to the successful satellite transformation, the transformation type comprising at least one of the following: satellite transformation, service link transformation, feeder link transformation, inter-cell handover;

[0657] Information of a target object accessed by the terminal before the successful satellite transformation, the target object comprising at least one of the following: satellite and cell;

[0658] Information of a target object accessed by the terminal after the successful satellite transformation;

[0659] User identification information corresponding to a cell accessed by the terminal before the successful satellite transformation;

[0660] User identification information corresponding to a cell accessed by the terminal after the successful satellite transformation;

[0661] Position information of the terminal at the time of the successful satellite transformation;

[0662] Time length information from the occurrence of the successful satellite transformation to the network device obtaining the first information;

[0663] A cause of the potential problems in the successful satellite transformation process;

[0664] Second measurement result information corresponding to the successful satellite transformation.

[0665] Optionally, the second measurement result information comprises at least one of the following:

[0666] Measurement result of a target object accessed by the terminal before the successful satellite transformation;

[0667] Measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite transformation;

[0668] Measurement result of a target object accessed by the terminal after the successful satellite transformation;

[0669] Measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite transformation;

[0670] The target object comprises at least one of the following: satellite, cell.

[0671] Optionally, the recording unit 401 is configured to:

[0672] In the case of meeting the second condition, record information related to potential problems in a successful satellite switching process;

[0673] The second condition includes at least one of the following:

[0674] When acquiring synchronization of the target satellite or the target cell, the ratio of the current value of the target timer to the configured value is greater than or equal to a ratio threshold of the target timer;

[0675] When acquiring synchronization of the target satellite or the target cell, the absolute value of the difference between the current value of the target timer and the configured value is less than or equal to a difference threshold of the target timer;

[0676] The difference between the time point of the stop serving of the source satellite or the source cell and the time point of the successful access of the terminal is less than or equal to a critical stop serving time length;

[0677] The time length from the satellite switching trigger to the synchronization of the target satellite or the target cell successfully acquired by the terminal is greater than or equal to a critical access time length.

[0678] Optionally, the apparatus further includes:

[0679] The second receiving unit is configured to receive the configuration information sent by the network device;

[0680] The configuration information includes at least one of the following:

[0681] The ratio threshold of the target timer;

[0682] The difference threshold of the target timer;

[0683] The critical stop serving time length;

[0684] The critical access time length.

[0685] It should be noted that the apparatus embodiment is one-to-one corresponding to the above-mentioned method embodiment, and all implementation manners in the above-mentioned method embodiment are applicable to the apparatus embodiment, and the same technical effects can be achieved.

[0686] It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division. When actually implemented, another division mode can be used. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0687] The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a processor-readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various other media that can store program codes.

[0688] As shown in Figure 5 The embodiments of the present application also provide a terminal, including a processor 500, a transceiver 510, a memory 520, and a program stored in the memory 520 and executable on the processor 500; wherein the transceiver 510 is connected with the processor 500 and the memory 520 through a bus interface, and the processor 500 is used to read the program in the memory and execute the following processes:

[0689] record first information, the first information including at least one of information related to satellite transformed radio link failure (RLF) and information related to potential problems in a successful satellite transformation process;

[0690] send the first information to a network device, the first information being used to assist in satellite-related mobile robustness optimization.

[0691] The transceiver 510 is used to receive and send data under the control of the processor 500.

[0692] wherein, in Figure 5In particular embodiments, the bus architecture can include any number of interconnecting buses and bridges, depending on the specific application of the processor 500 and the overall design constraints. The bus architecture can link together various circuits such as the processor 500, which represents one or more processors, and the memory 520, which represents the memory of the various circuits. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus, not described further. The bus interface provides an interface to the transceiver 510. The transceiver 510 can be a plurality of elements including a transmitter and a receiver, which provides a means for communicating with various other apparatus over a transmission medium, which includes a wireless channel, a wired channel, optical cable, and the like. The user interface 530 can also be an interface to external or internal devices such as a keyboard, a display, a speaker, a microphone, a joystick, and the like, which can be connected to the device.

[0693] The processor 500 is responsible for managing the bus architecture and general processing, while the memory 520 can store the data used by the processor 500 in executing its operations.

[0694] Optionally, the processor 500 can be a CPU (Central Processing Unit), an ASIC (Application-Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor can also be a multi-core architecture.

[0695] The processor executes any of the methods provided by the embodiments of the present application by invoking the computer program stored in the memory. The processor and the memory can also be physically located in different places.

[0696] Optionally, the information related to the satellite switching of the RLF includes at least one of the following:

[0697] The type of action triggered most recently before the RLF, the type of action including at least one of the following: satellite switching, serving link switching, feeder link switching, inter-cell handover;

[0698] The length of time from the satellite switching or inter-cell handover triggered most recently before the RLF to the RLF;

[0699] The length of time from the RLF to the network device obtaining the first information;

[0700] The length of time from the RLF to the terminal re-accessing the network;

[0701] information of a target object accessed or attempted to be accessed, the target object comprising a satellite and / or a cell, in case that a first condition is met;

[0702] user identity information corresponding to a cell accessed or attempted to be accessed, in case that the first condition is met;

[0703] location information of a terminal when satellite switching is triggered;

[0704] location information of a terminal when RLF occurs;

[0705] location information of a terminal when satellite switching or inter-cell handover is triggered last time before RLF occurs;

[0706] first measurement result information corresponding to RLF;

[0707] The first condition comprises at least one of the following:

[0708] before satellite switching is triggered;

[0709] when satellite switching is triggered;

[0710] before satellite switching or inter-cell handover is triggered last time before RLF occurs;

[0711] after satellite switching or inter-cell handover is triggered last time before RLF occurs;

[0712] after RLF occurs and before a radio resource control (RRC) connection re-establishment procedure is triggered;

[0713] after RLF occurs;

[0714] after RLF occurs and after a RRC connection re-establishment procedure is failed to be triggered.

[0715] Optionally, the first measurement result information comprises at least one of the following:

[0716] measurement result of a target object accessed by a terminal before satellite switching is triggered;

[0717] measurement result of a neighboring cell of a target object accessed by a terminal before satellite switching is triggered;

[0718] measurement result of a target object attempted to be accessed by a terminal after satellite switching is triggered;

[0719] measurement result of a neighboring cell of a target object attempted to be accessed by a terminal after satellite switching is triggered;

[0720] measurement result of a target object accessed by a terminal when RLF occurs;

[0721] measurement result of a neighboring cell of a target object accessed by a terminal when RLF occurs;

[0722] measurement result of a target object accessed by the terminal before the last satellite switch or inter-cell handover before the RLF occurs;

[0723] measurement result of a neighbor cell of a target object accessed by the terminal before the last satellite switch or inter-cell handover before the RLF occurs;

[0724] measurement result of a target object accessed by the terminal after the last satellite switch or inter-cell handover before the RLF occurs;

[0725] measurement result of a neighbor cell of a target object accessed by the terminal after the last satellite switch or inter-cell handover before the RLF occurs.

[0726] Optionally, the information related to the RLF of the satellite switch further comprises:

[0727] a time length of a common coverage of a source satellite and a target satellite accessed by the terminal during the satellite switch.

[0728] Optionally, in a case where the first information comprises the information related to the RLF of the satellite switch, the first information further comprises at least one of:

[0729] network-configured service cell and neighbor cell service link propagation delay difference configuration information;

[0730] service link propagation delay difference of the service cell and the neighbor cell in the terminal assistance information;

[0731] time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0732] Optionally, the service cell and neighbor cell service link propagation delay difference configuration information comprises at least one of:

[0733] a service cell and neighbor cell service link propagation delay difference threshold;

[0734] a neighbor cell information list.

[0735] Optionally, the information related to potential problems in the successful satellite switch process comprises at least one of:

[0736] a switch type corresponding to the successful satellite switch, the switch type comprising at least one of: a satellite switch, a service link switch, a feeder link switch, and an inter-cell handover;

[0737] information of a target object accessed by the terminal before the successful satellite switch, the target object comprising a satellite and / or a cell;

[0738] Information of a target object accessed by the terminal after the successful satellite handover;

[0739] User identification information corresponding to a cell accessed by the terminal before the successful satellite handover;

[0740] User identification information corresponding to a cell accessed by the terminal after the successful satellite handover;

[0741] Position information of the terminal at the time of the successful satellite handover;

[0742] Time length information of a time period from the occurrence of the successful satellite handover to the network device obtaining the first information;

[0743] A cause of a potential problem in the process of the successful satellite handover;

[0744] Second measurement result information corresponding to the successful satellite handover.

[0745] Optionally, the second measurement result information includes at least one of the following:

[0746] A measurement result of a target object accessed by the terminal before the successful satellite handover;

[0747] A measurement result of a neighbor cell of the target object accessed by the terminal before the successful satellite handover;

[0748] A measurement result of a target object accessed by the terminal after the successful satellite handover;

[0749] A measurement result of a neighbor cell of the target object accessed by the terminal after the successful satellite handover;

[0750] The target object includes at least one of the following: a satellite, a cell.

[0751] Optionally, the processor is configured to read a computer program in the memory and perform the following operations:

[0752] In a case where a second condition is met, record information related to a potential problem in the process of the successful satellite handover;

[0753] The second condition includes at least one of the following:

[0754] When synchronization of a target satellite or a target cell is obtained, a ratio of a current value of a target timer to a configuration value is greater than or equal to a ratio threshold of the target timer;

[0755] When synchronization of a target satellite or a target cell is obtained, an absolute value of a difference between a current value of a target timer and a configuration value is less than or equal to a difference threshold of the target timer;

[0756] A difference between a point in time when the source satellite or the source cell stops serving and a point in time when the terminal successfully accesses is less than or equal to a critical stop serving time length;

[0757] A time length from a satellite change trigger to a time when the terminal successfully acquires synchronization of the target satellite or the target cell is greater than or equal to a critical access time length.

[0758] Optionally, the processor, configured to read the computer program in the memory, further performs the following operation:

[0759] Receiving configuration information sent by the network device;

[0760] The configuration information includes at least one of the following:

[0761] A proportion threshold of the target timer;

[0762] A difference threshold of the target timer;

[0763] The critical stop serving time length;

[0764] The critical access time length.

[0765] It is to be noted that the terminal provided by the embodiments of the present application can realize all the method steps achieved by the method embodiments and achieve the same technical effects, and the same parts and beneficial effects of the method embodiments will not be described in detail herein.

[0766] The embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the information transmission method applied to the terminal. The processor readable storage medium can be any available medium or data storage device accessible by the processor, including but not limited to a magnetic memory (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical memory (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid state disk (SSD), etc.).

[0767] As shown in FIG. 6, the embodiments of the present application provide an information transmission device 600 applied to a network device, which comprises: Figure 6 A first receiving unit 601, configured to receive first information sent by a terminal;

[0768]

[0769] ​The first information is used to assist satellite-related mobile robustness optimization, and the first information includes at least one of information related to satellite transition radio link failure (RLF) and information related to potential problems in a successful satellite transition process.

[0770] Optionally, the information related to satellite transition RLF includes at least one of the following:

[0771] An action type triggered most recently before the RLF, the action type including at least one of the following: satellite transition, serving link transition, feeder link transition, and inter-cell handover;

[0772] Time length information from the satellite transition or inter-cell handover triggered most recently before the RLF to the RLF;

[0773] Time length information from the RLF to the network device obtaining the first information;

[0774] Time length information from the RLF to the terminal re-accessing the network;

[0775] In a case where a first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0776] In a case where a first condition is met, user identification information corresponding to a cell accessed or attempted to be accessed;

[0777] Position information of the terminal when the satellite transition is triggered;

[0778] Position information of the terminal when the RLF occurs;

[0779] Position information of the terminal when the satellite transition or inter-cell handover is triggered most recently before the RLF;

[0780] First measurement result information corresponding to the RLF;

[0781] The first condition includes at least one of the following:

[0782] Before the satellite transition is triggered;

[0783] When the satellite transition is triggered;

[0784] Before the satellite transition or inter-cell handover is triggered most recently before the RLF;

[0785] After the satellite transition or inter-cell handover is triggered most recently before the RLF;

[0786] After the RLF and before a radio resource control (RRC) connection re-establishment process is triggered;

[0787] RLF occurs;

[0788] RLF occurs, and after triggering RRC connection re-establishment failure.

[0789] Optionally, the first measurement result information comprises at least one of:

[0790] measurement result of a target object accessed by the terminal before triggering satellite transformation;

[0791] measurement result of a neighbor cell of the target object accessed by the terminal before triggering satellite transformation;

[0792] measurement result of a target object attempted to be accessed by the terminal after satellite transformation;

[0793] measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after satellite transformation;

[0794] measurement result of a target object accessed by the terminal when RLF occurs;

[0795] measurement result of a neighbor cell of the target object accessed by the terminal when RLF occurs;

[0796] measurement result of a target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0797] measurement result of a neighbor cell of the target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0798] measurement result of a target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs;

[0799] measurement result of a neighbor cell of the target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs.

[0800] Optionally, the information related to RLF of satellite transformation further comprises:

[0801] time length of a source satellite and a target satellite accessed by the terminal during satellite transformation jointly covering.

[0802] Optionally, in the case that the first information comprises information related to RLF of satellite transformation, the first information further comprises at least one of:

[0803] service link propagation delay difference configuration information of a serving cell and a neighbor cell configured by the network;

[0804] service link propagation delay difference of a serving cell and a neighbor cell in terminal assistance information;

[0805] A time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0806] Optionally, the service cell and the neighbor cell service link propagation delay difference configuration information comprises at least one of the following:

[0807] A service cell and a neighbor cell service link propagation delay difference threshold.

[0808] A neighbor cell information list.

[0809] Optionally, the information related to potential problems in the successful satellite switching process comprises at least one of the following:

[0810] A switching type corresponding to the successful satellite switching, wherein the switching type comprises at least one of the following: satellite switching, service link switching, feeder link switching, and inter-cell handover.

[0811] Information of a target object accessed by the terminal before the successful satellite switching, wherein the target object comprises a satellite and / or a cell.

[0812] Information of a target object accessed by the terminal after the successful satellite switching.

[0813] User identification information of a cell accessed by the terminal before the successful satellite switching.

[0814] User identification information of a cell accessed by the terminal after the successful satellite switching.

[0815] Position information of the terminal at the time of the successful satellite switching.

[0816] Time length information from the occurrence of the successful satellite switching to the acquisition of the first information by the network device.

[0817] A cause of the potential problems in the successful satellite switching process.

[0818] Second measurement result information corresponding to the successful satellite switching.

[0819] Optionally, the second measurement result information comprises at least one of the following:

[0820] A measurement result of a target object accessed by the terminal before the successful satellite switching.

[0821] A measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite switching.

[0822] A measurement result of a target object accessed by the terminal after the successful satellite switching.

[0823] A measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite switching.

[0824] The target object includes at least one of the following: a satellite, a cell.

[0825] Optionally, the apparatus further includes:

[0826] The second sending unit is configured to send configuration information to the terminal.

[0827] The configuration information includes at least one of the following:

[0828] A ratio threshold of the target timer.

[0829] A difference threshold of the target timer.

[0830] A critical out-of-service time length.

[0831] A critical access time length.

[0832] It should be noted that the apparatus embodiment is one-to-one corresponding to the above-mentioned method embodiment, and all implementation manners in the above-mentioned method embodiment are applicable to the apparatus embodiment, and the same technical effects can be achieved.

[0833] It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division. In actual implementation, another division manner can be used. In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0834] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0835] As Figure 7As shown, the embodiments of the present application also provide a network device, comprising a processor 700, a transceiver 710, a memory 720, and a program stored in the memory 720 and executable on the processor 700; wherein the transceiver 710 is connected with the processor 700 and the memory 720 through a bus interface, wherein the processor 700 is configured to read the program in the memory and perform the following processes: wherein the processor is configured to read the computer program in the memory to perform the following operations:

[0836] receive, by the transceiver, first information sent by the terminal;

[0837] The first information is used to assist in satellite-related mobile robustness optimization; and the first information comprises at least one of information related to satellite transformation wireless link failure (RLF) and information related to potential problems in a successful satellite transformation process.

[0838] The transceiver 710 is configured to receive and send data under the control of the processor 700.

[0839] The first information is used to assist in satellite-related mobile robustness optimization; and the first information comprises at least one of information related to satellite transformation wireless link failure (RLF) and information related to potential problems in a successful satellite transformation process. Figure 7 The bus architecture can include any number of interconnecting buses and bridges, and the various circuitry representative of the processor 700 and the memory 720 is linked together by the bus architecture. The bus architecture can also link various other circuitry, such as peripheral devices, voltage regulators, and power management circuitry, all of which are well known in the art, and therefore, will not be described further. The bus interface provides an interface to the transceiver 710. The transceiver 710 can be a number of elements, including a transmitter and a receiver, that together enable the processing system to communicate with various other apparatus over a transmission medium, which includes, without limitation, a wireless channel, a wired channel, optical fiber cable, and the like. The user interface 730 can also be an interface to other devices that can be connected to the processing system, including, without limitation, a keyboard, a mouse, a display, a speaker, a microphone, and the like.

[0840] The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 in performing operations.

[0841] Optionally, the processor 700 can be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device), and the processor can also adopt a multi-core architecture.

[0842] The processor calls a computer program stored in the memory to execute any of the methods provided by the embodiments of the present application according to the executable instructions obtained. The processor and the memory can also be arranged physically separately.

[0843] Optionally, the information related to the satellite switching of the RLF includes at least one of the following:

[0844] An action type triggered most recently before the RLF, the action type including at least one of the following: satellite switching, serving link switching, feeder link switching, inter-cell handover;

[0845] Time length information from when the satellite switching or inter-cell handover is triggered most recently before the RLF to when the RLF occurs;

[0846] Time length information from when the RLF occurs to when the network device obtains the first information;

[0847] Time length information from when the RLF occurs to when the terminal re-accesses the network;

[0848] In the case where the first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell;

[0849] In the case where the first condition is met, user identity information corresponding to a cell accessed or attempted to be accessed;

[0850] Position information of the terminal when the satellite switching is triggered;

[0851] Position information of the terminal when the RLF occurs;

[0852] Position information of the terminal when the satellite switching or inter-cell handover is triggered most recently before the RLF;

[0853] First measurement result information corresponding to the RLF;

[0854] The first condition includes at least one of the following:

[0855] Before the satellite switching is triggered;

[0856] When the satellite switching is triggered;

[0857] Before the satellite switching or inter-cell handover is triggered most recently before the RLF;

[0858] After the satellite switching or inter-cell handover is triggered most recently before the RLF;

[0859] After the RLF occurs and a radio resource control (RRC) connection re-establishment procedure is triggered;

[0860] RLF occurs;

[0861] RLF occurs, and after triggering RRC connection re-establishment failure.

[0862] Optionally, the first measurement result information comprises at least one of:

[0863] measurement result of a target object accessed by the terminal before triggering satellite transformation;

[0864] measurement result of a neighbor cell of the target object accessed by the terminal before triggering satellite transformation;

[0865] measurement result of a target object attempted to be accessed by the terminal after satellite transformation;

[0866] measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after satellite transformation;

[0867] measurement result of a target object accessed by the terminal when RLF occurs;

[0868] measurement result of a neighbor cell of the target object accessed by the terminal when RLF occurs;

[0869] measurement result of a target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0870] measurement result of a neighbor cell of the target object accessed by the terminal before the last satellite transformation or inter-cell handover before RLF occurs;

[0871] measurement result of a target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs;

[0872] measurement result of a neighbor cell of the target object accessed by the terminal after the last satellite transformation or inter-cell handover before RLF occurs.

[0873] Optionally, the information related to RLF of satellite transformation further comprises:

[0874] time length of a source satellite and a target satellite accessed by the terminal during satellite transformation jointly covering.

[0875] Optionally, in the case that the first information comprises information related to RLF of satellite transformation, the first information further comprises at least one of:

[0876] service link propagation delay difference configuration information of a serving cell and a neighbor cell configured by the network;

[0877] service link propagation delay difference of a serving cell and a neighbor cell in terminal assistance information;

[0878] A time offset between uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

[0879] Optionally, the service cell and the neighbor cell service link propagation delay difference configuration information comprises at least one of the following:

[0880] A service cell and a neighbor cell service link propagation delay difference threshold;

[0881] A neighbor cell information list.

[0882] Optionally, the information related to potential problems in the successful satellite switching process comprises at least one of the following:

[0883] A switching type corresponding to the successful satellite switching, the switching type comprising at least one of the following: satellite switching, service link switching, feeder link switching, inter-cell handover;

[0884] Information of a target object accessed by the terminal before the successful satellite switching, the target object comprising a satellite and / or a cell;

[0885] Information of a target object accessed by the terminal after the successful satellite switching;

[0886] User identification information of a cell accessed by the terminal before the successful satellite switching;

[0887] User identification information of a cell accessed by the terminal after the successful satellite switching;

[0888] Position information of the terminal at the time of the successful satellite switching;

[0889] Time length information from the occurrence of the successful satellite switching to the network device obtaining the first information;

[0890] A cause of the potential problems in the successful satellite switching process;

[0891] Second measurement result information corresponding to the successful satellite switching.

[0892] Optionally, the second measurement result information comprises at least one of the following:

[0893] A measurement result of a target object accessed by the terminal before the successful satellite switching;

[0894] A measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite switching;

[0895] A measurement result of a target object accessed by the terminal after the successful satellite switching;

[0896] A measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite switching;

[0897] The target object includes at least one of a satellite and a cell.

[0898] Optionally, the processor configured to read the computer program in the memory is further configured to perform the following operations:

[0899] sending configuration information to the terminal;

[0900] The configuration information includes at least one of the following:

[0901] a ratio threshold of the target timer;

[0902] a difference threshold of the target timer;

[0903] a critical out-of-service time length;

[0904] a critical access time length.

[0905] It should be noted that the network device provided by the embodiments of the present application can realize all the method steps achieved by the method embodiments and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0906] The embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the information transmission method applied to the network device. The processor readable storage medium can be any available medium or data storage device accessible by the processor, including but not limited to a magnetic memory (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical memory (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid state disk (SSD), etc.).

[0907] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer usable program code.

[0908] The computer executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart

[0909] These processor-executable instructions can also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart

[0910] These processor-executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart Figure 1 one or more flows and / or functions specified in the flowchart

[0911] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method of information transmission, characterized in that, The method is performed by a terminal, comprising: recording first information, the first information comprising at least one of information related to satellite switched radio link failure (RLF) and information related to potential problems in a successful satellite switching process; sending the first information to a network device, the first information being used to assist satellite related mobile robustness optimization.

2. The method of claim 1, wherein, The information related to satellite switched RLF comprises at least one of: a type of action triggered most recently before the RLF, the type of action comprising at least one of satellite switching, serving link switching, feeder link switching, and inter-cell handover; time length information from when the satellite switching or inter-cell handover was triggered most recently before the RLF to when the RLF occurred; time length information from when the RLF occurred to when the network device obtained the first information; time length information from when the RLF occurred to when the terminal re-accessed the network; information of a target object accessed or attempted to be accessed under a first condition, the target object comprising a satellite and / or a cell; user identity information of a cell accessed or attempted to be accessed under the first condition; location information of the terminal when the satellite switching was triggered; location information of the terminal when the RLF occurred; location information of the terminal when the satellite switching or inter-cell handover was triggered most recently before the RLF; first measurement result information corresponding to the RLF; The first condition comprises at least one of: before the satellite switching was triggered; when the satellite switching was triggered; before the satellite switching or inter-cell handover was triggered most recently before the RLF; after the satellite switching or inter-cell handover was triggered most recently before the RLF; after the RLF occurred and before a radio resource control (RRC) connection re-establishment procedure was triggered; after the RLF occurred; after the RLF occurred and after the RRC connection re-establishment failed.

3. The method of claim 2, wherein, The first measurement result information comprises at least one of: measurement result of a target object accessed by the terminal before the satellite switching was triggered; measurement result of a neighbor cell of the target object accessed by the terminal before the satellite switching was triggered; measurement result of a target object attempted to be accessed by the terminal after the satellite switching was triggered; measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after the satellite switching was triggered; measurement result of a target object accessed by the terminal when the RLF occurred; measurement result of a neighbor cell of the target object accessed by the terminal when the RLF occurred; measurement result of a target object accessed by the terminal before the satellite switching or inter-cell handover was triggered most recently before the RLF; measurement result of a neighbor cell of the target object accessed by the terminal before the satellite switching or inter-cell handover was triggered most recently before the RLF; measurement result of a target object accessed by the terminal after the satellite switching or inter-cell handover was triggered most recently before the RLF; measurement result of a neighbor cell of the target object accessed by the terminal after the satellite switching or inter-cell handover was triggered most recently before the RLF.

4. The method of claim 2, wherein, The information related to satellite switched RLF further comprises: time length of a period during which a source satellite and a target satellite accessed by the terminal during the satellite switching process are jointly covered.

5. The method according to any one of claims 1 to 4, characterized in that, In a case that the first information comprises information related to RLF of satellite switching, the first information further comprises at least one of: network-configured serving cell and neighbor cell serving link propagation delay difference configuration information; serving link propagation delay difference of serving cell and neighbor cell in terminal assistance information; time offset between uplink synchronization signal blocks (SSBs) of source satellite and target satellite.

6. The method of claim 5, wherein, The serving cell and neighbor cell serving link propagation delay difference configuration information comprises at least one of: serving link propagation delay difference threshold of serving cell and neighbor cell; a neighbor cell information list.

7. The method of claim 1, wherein, The information related to potential problems in successful satellite switching process comprises at least one of: switching type corresponding to successful satellite switching, the switching type comprising at least one of: satellite switching, serving link switching, feeder link switching, inter-cell handover; information of a target object accessed by the terminal before successful satellite switching, the target object comprising a satellite and / or a cell; information of a target object accessed by the terminal after successful satellite switching; user identification information of a cell accessed by the terminal before successful satellite switching; user identification information of a cell accessed by the terminal after successful satellite switching; location information of the terminal at the time of successful satellite switching; time length information from occurrence of successful satellite switching to acquisition of the first information by the network device; cause of potential problems in successful satellite switching process; second measurement result information corresponding to successful satellite switching.

8. The method of claim 7, wherein, The second measurement result information comprises at least one of: measurement result of a target object accessed by the terminal before successful satellite switching; measurement result of a neighbor cell of a target object accessed by the terminal before successful satellite switching; measurement result of a target object accessed by the terminal after successful satellite switching; measurement result of a neighbor cell of a target object accessed by the terminal after successful satellite switching; wherein the target object comprises at least one of: a satellite, a cell.

9. The method of claim 1, 7 or 8, wherein, Recording information related to potential problems in successful satellite switching process comprises: recording information related to potential problems in successful satellite switching process in a case that a second condition is met; wherein the second condition comprises at least one of: a ratio of a current value of a target timer to a configuration value is greater than or equal to a ratio threshold of the target timer when synchronization of a target satellite or a target cell is acquired; an absolute value of a difference between the current value of the target timer and the configuration value is less than or equal to a difference threshold of the target timer when synchronization of the target satellite or the target cell is acquired; a difference between a stop serving time point of a source satellite or a source cell and a time point of successful access by the terminal is less than or equal to a critical stop serving time length; a time length from satellite switching triggering to successful acquisition of synchronization of the target satellite or the target cell by the terminal is greater than or equal to a critical access time length.

10. The method of claim 9, wherein, Further comprising: receiving configuration information sent by the network device; wherein the configuration information comprises at least one of: the ratio threshold of the target timer; the difference threshold of the target timer; the critical stop serving time length; the critical access time length.

11. An information transmission method, characterized by, performed by the network device, comprising: receiving first information sent by the terminal; The first information is used for assisting satellite-related mobile robustness optimization, and the first information includes at least one of information related to satellite transition radio link failure (RLF) and information related to potential problems in a successful satellite transition process.

12. The method of claim 11, wherein, The information related to satellite transition RLF includes at least one of the following: An action type triggered most recently before the RLF occurs, the action type including at least one of satellite transition, serving link transition, feeder link transition, and inter-cell handover; Time length information from when the satellite transition or inter-cell handover is triggered most recently before the RLF occurs to when the RLF occurs; Time length information from when the RLF occurs to when the network device obtains the first information; Time length information from when the RLF occurs to when the terminal re-accesses the network; In a case where a first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell; In a case where the first condition is met, user identity information of a cell accessed or attempted to be accessed; Location information of the terminal when the satellite transition is triggered; Location information of the terminal when the RLF occurs; Location information of the terminal when the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; First measurement result information corresponding to the RLF; The first condition includes at least one of the following: Before the satellite transition is triggered; When the satellite transition is triggered; Before the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; After the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; After the RLF occurs and before a radio resource control (RRC) connection re-establishment process is triggered; After the RLF occurs; After the RLF occurs and after the RRC connection re-establishment fails.

13. The method of claim 12, wherein, The first measurement result information includes at least one of the following: Measurement result of a target object accessed by the terminal before the satellite transition is triggered; Measurement result of a neighbor cell of the target object accessed by the terminal before the satellite transition is triggered; Measurement result of a target object attempted to be accessed by the terminal after the satellite transition is triggered; Measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after the satellite transition is triggered; Measurement result of a target object accessed by the terminal when the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal when the RLF occurs; Measurement result of a target object accessed by the terminal before the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal before the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; Measurement result of a target object accessed by the terminal after the satellite transition or inter-cell handover is triggered most recently before the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal after the satellite transition or inter-cell handover is triggered most recently before the RLF occurs.

14. The method of claim 12, wherein, The information related to satellite transition RLF further includes: Time length during which a source satellite and a target satellite accessed by the terminal in the satellite transition process are jointly covered.

15. The method according to any one of claims 11-14, characterized in that, In a case where the first information includes the information related to satellite transition RLF, the first information further includes at least one of the following: The network configures the serving cell and the neighbor cell to serve the link propagation delay difference configuration information. The serving cell and the neighbor cell in the terminal auxiliary information serve the link propagation delay difference. The time offset between the uplink synchronization signal blocks (SSBs) of the source satellite and the target satellite.

16. The method of claim 15, wherein, The serving cell and the neighbor cell serving link propagation delay difference configuration information includes at least one of the following: The serving cell and the neighbor cell serving link propagation delay difference threshold; The neighbor cell information list.

17. The method of claim 11, wherein, The information related to potential problems in the successful satellite transformation process includes at least one of the following: The transformation type corresponding to the successful satellite transformation, including at least one of the following: satellite transformation, service link transformation, feeder link transformation, inter-cell handover; The information of the target object accessed by the terminal before the successful satellite transformation, including satellites and / or cells; The information of the target object accessed by the terminal after the successful satellite transformation; The user identification information of the cell accessed by the terminal before the successful satellite transformation; The user identification information of the cell accessed by the terminal after the successful satellite transformation; The location information of the terminal at the time of the successful satellite transformation; The time length information from the occurrence of the successful satellite transformation to the network device obtaining the first information; The cause of the potential problem in the successful satellite transformation process; The second measurement result information corresponding to the successful satellite transformation.

18. The method of claim 17, wherein, The second measurement result information includes at least one of the following: The measurement result of the target object accessed by the terminal before the successful satellite transformation; The measurement result of the neighbor cell of the target object accessed by the terminal before the successful satellite transformation; The measurement result of the target object accessed by the terminal after the successful satellite transformation; The measurement result of the neighbor cell of the target object accessed by the terminal after the successful satellite transformation; The target object includes at least one of the following: satellite, cell.

19. The method of claim 11, 17 or 18, wherein, Further comprising: Sending configuration information to the terminal; The configuration information includes at least one of the following: The proportion threshold of the target timer; The difference threshold of the target timer; The critical stop service time length; The critical access time length.

20. A terminal, characterized by Including a memory, a transceiver, and a processor: The memory is used to store computer programs; the transceiver is used to transceive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations: Record the first information, which includes at least one of the information related to the radio link failure (RLF) of the satellite transformation and the information related to the potential problems in the successful satellite transformation process; Send the first information to the network device, which is used to assist in satellite-related mobile robustness optimization.

21. The terminal according to claim 20, characterized by The information related to the RLF of the satellite transformation includes at least one of the following: The type of the last action triggered before the RLF, including at least one of the following: satellite transformation, service link transformation, feeder link transformation, inter-cell handover; The time length information from the last satellite transformation or inter-cell handover execution before the RLF to the occurrence of the RLF; The time length information from the occurrence of the RLF to the network device obtaining the first information; The time length information from the occurrence of the RLF to the terminal re-accessing the network; In the case of satisfying the first condition, information of a target object accessed or attempted to be accessed by the terminal, the target object including a satellite and / or a cell; In the case of satisfying the first condition, user identity information corresponding to a cell accessed or attempted to be accessed by the terminal; Location information of the terminal when satellite switching is triggered; Location information of the terminal when RLF occurs; Location information of the terminal when satellite switching or inter-cell handover is triggered for the last time before RLF occurs; First measurement result information corresponding to RLF; The first condition includes at least one of the following: Before satellite switching is triggered; When satellite switching is triggered; Before satellite switching or inter-cell handover is triggered for the last time before RLF occurs; After satellite switching or inter-cell handover is triggered for the last time before RLF occurs; After RLF occurs and before a radio resource control (RRC) connection reestablishment procedure is triggered; After RLF occurs; After RLF occurs and after an RRC connection reestablishment failure is triggered.

22. The terminal according to claim 21, characterized by The first measurement result information includes at least one of the following: Measurement result of a target object accessed by the terminal before satellite switching is triggered; Measurement result of a neighbor cell of the target object accessed by the terminal before satellite switching is triggered; Measurement result of a target object attempted to be accessed by the terminal after satellite switching is triggered; Measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after satellite switching is triggered; Measurement result of a target object accessed by the terminal when RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal when RLF occurs; Measurement result of a target object accessed by the terminal before satellite switching or inter-cell handover for the last time before RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal before satellite switching or inter-cell handover for the last time before RLF occurs; Measurement result of a target object accessed by the terminal after satellite switching or inter-cell handover for the last time before RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal after satellite switching or inter-cell handover for the last time before RLF occurs.

23. The terminal according to claim 21, characterized by The information related to RLF of satellite switching further includes: Length of time during which a source satellite and a target satellite accessed by the terminal during satellite switching are jointly covered.

24. The terminal according to any of claims 20-23, characterized by In the case of the first information including the information related to RLF of satellite switching, the first information further includes at least one of the following: Network-configured service cell and neighbor cell service link propagation delay difference configuration information; Service link propagation delay difference of the service cell and the neighbor cell in terminal assistance information; Time offset between uplink synchronization signal blocks (SSBs) on the source satellite and the target satellite.

25. The terminal according to claim 24, characterized by The service cell and neighbor cell service link propagation delay difference configuration information includes at least one of the following: Service cell and neighbor cell service link propagation delay difference threshold; Neighbor cell information list.

26. The terminal of claim 20, wherein, The information related to potential problems in a successful satellite switching process includes at least one of the following: Switching type corresponding to the successful satellite switching, the switching type including at least one of the following: satellite switching, service link switching, feeder link switching, inter-cell handover; Information of target objects accessed by the terminal before the successful satellite switch, the target objects including satellites and / or cells; Information of target objects accessed by the terminal after the successful satellite switch; User identity information corresponding to a cell accessed by the terminal before the successful satellite switch; User identity information corresponding to a cell accessed by the terminal after the successful satellite switch; Position information of the terminal at the time of the successful satellite switch; Time length information from the occurrence of the successful satellite switch to the network device obtaining the first information; Causes of potential problems in the successful satellite switch process; Second measurement result information corresponding to the successful satellite switch.

27. The terminal according to claim 26, characterized by The second measurement result information includes at least one of the following: Measurement results of target objects accessed by the terminal before the successful satellite switch; Measurement results of neighboring cells of target objects accessed by the terminal before the successful satellite switch; Measurement results of target objects accessed by the terminal after the successful satellite switch; Measurement results of neighboring cells of target objects accessed by the terminal after the successful satellite switch; The target objects include at least one of the following: satellites, cells.

28. The terminal according to claim 20, 26 or 27, characterized by The processor is configured to read the computer program in the memory and perform the following operations: In the case where a second condition is met, record information related to potential problems in the successful satellite switch process; The second condition includes at least one of the following: When the target satellite or the target cell is synchronized, the ratio of the current value of the target timer to the configured value is greater than or equal to the ratio threshold of the target timer; When the target satellite or the target cell is synchronized, the absolute value of the difference between the current value of the target timer and the configured value is less than or equal to the difference threshold of the target timer; The difference between the time point of the stop service of the source satellite or the source cell and the time point of the successful access of the terminal is less than or equal to the critical stop service time length; The time length from the satellite switch trigger to the successful synchronization of the target satellite or the target cell by the terminal is greater than or equal to the critical access time length.

29. The terminal according to claim 28, characterized by The processor is configured to read the computer program in the memory and perform the following operations: Receive the configuration information sent by the network device; The configuration information includes at least one of the following: The ratio threshold of the target timer; The difference threshold of the target timer; The critical stop service time length; The critical access time length.

30. A network device, comprising: The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations: Receive the first information sent by the terminal through the transceiver; The first information is used to assist in satellite-related mobile robustness optimization; and the first information includes at least one of the following: satellite switch-related radio link failure (RLF) information and information related to potential problems in the successful satellite switch process. The satellite switch-related RLF information includes at least one of the following:

31. The network device of claim 30, wherein, The type of the last action triggered before the RLF, the action type including at least one of the following: satellite switch, service link switch, feeder link switch, and inter-cell handover; ​ Time length information from the last time satellite switching or inter-cell handover is triggered before the RLF occurs to the time when the RLF occurs; Time length information from the RLF occurs to the time when the network device obtains the first information; Time length information from the RLF occurs to the time when the terminal re-accesses the network; In the case where the first condition is met, information of a target object accessed or attempted to be accessed, the target object including a satellite and / or a cell; In the case where the first condition is met, user identity information corresponding to a cell accessed or attempted to be accessed; Location information of the terminal when satellite switching is triggered; Location information of the terminal when the RLF occurs; Location information of the terminal when the last satellite switching or inter-cell handover is triggered before the RLF occurs; First measurement result information corresponding to the RLF; The first condition includes at least one of the following: Before satellite switching is triggered; When satellite switching is triggered; Before the last satellite switching or inter-cell handover is triggered before the RLF occurs; After the last satellite switching or inter-cell handover is triggered before the RLF occurs; After the RLF occurs and before a radio resource control (RRC) connection re-establishment procedure is triggered; After the RLF occurs; After the RLF occurs and after the RRC connection re-establishment fails.

32. The network device of claim 31, wherein, The first measurement result information includes at least one of the following: Measurement result of a target object accessed by the terminal before satellite switching is triggered; Measurement result of a neighbor cell of the target object accessed by the terminal before satellite switching is triggered; Measurement result of a target object attempted to be accessed by the terminal after satellite switching is triggered; Measurement result of a neighbor cell of the target object attempted to be accessed by the terminal after satellite switching is triggered; Measurement result of a target object accessed by the terminal when the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal when the RLF occurs; Measurement result of a target object accessed by the terminal before the last satellite switching or inter-cell handover before the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal before the last satellite switching or inter-cell handover before the RLF occurs; Measurement result of a target object accessed by the terminal after the last satellite switching or inter-cell handover before the RLF occurs; Measurement result of a neighbor cell of the target object accessed by the terminal after the last satellite switching or inter-cell handover before the RLF occurs.

33. The network device of claim 31, wherein, The information related to the RLF of satellite switching further includes: Time length of a period during which a source satellite and a target satellite accessed by the terminal during satellite switching jointly cover.

34. The network device of any of claims 30-33, wherein, In the case where the first information includes the information related to the RLF of satellite switching, the first information further includes at least one of the following: Network-configured service cell and neighbor cell service link propagation delay difference configuration information; Service link propagation delay difference of the service cell and the neighbor cell in terminal assistance information; Time offset between uplink synchronization signal blocks (SSBs) on the source satellite and the target satellite.

35. The network device of claim 34, wherein, The service cell and neighbor cell service link propagation delay difference configuration information includes at least one of the following: Service cell and neighbor cell service link propagation delay difference threshold; Neighbor cell information list.

36. The network device of claim 30, wherein, The information related to potential problems in a successful satellite switching process includes at least one of the following: a type of the successful satellite handover, the type of the successful satellite handover comprising at least one of: a satellite handover, a serving link handover, a feeder link handover, an inter-cell handover; information of a target object accessed by the terminal before the successful satellite handover, the target object comprising at least one of: a satellite and a cell; information of a target object accessed by the terminal after the successful satellite handover; user identity information corresponding to a cell accessed by the terminal before the successful satellite handover; user identity information corresponding to a cell accessed by the terminal after the successful satellite handover; location information of the terminal at the time of the successful satellite handover; time length information from when the successful satellite handover occurs to when the network device obtains the first information; a cause of a potential problem in the successful satellite handover; second measurement result information corresponding to the successful satellite handover.

37. The network device of claim 36, wherein, The second measurement result information comprises at least one of: a measurement result of a target object accessed by the terminal before the successful satellite handover; a measurement result of a neighbor cell of a target object accessed by the terminal before the successful satellite handover; a measurement result of a target object accessed by the terminal after the successful satellite handover; a measurement result of a neighbor cell of a target object accessed by the terminal after the successful satellite handover; The target object comprises at least one of: a satellite and a cell.

38. The network device of claim 30, 36, or 37, wherein, The processor is configured to read a computer program in the memory, and the computer program is further configured to cause the processor to perform the following operations: sending configuration information to the terminal; The configuration information comprises at least one of: a proportion threshold of a target timer; a difference threshold of a target timer; a critical stop serving time length; a critical access time length.

39. An information transmission apparatus applied to a terminal, comprising: The method comprises: a recording unit configured to record first information, the first information comprising at least one of: information related to a radio link failure (RLF) of a satellite handover and information related to a potential problem in a successful satellite handover; a first sending unit configured to send the first information to a network device, the first information being used to assist satellite-related mobile robustness optimization.

40. An information transmission apparatus applied to a network device, comprising: The method comprises: a first receiving unit configured to receive first information sent by a terminal; The first information is used to assist satellite-related mobile robustness optimization; and the first information comprises at least one of: information related to a radio link failure (RLF) of a satellite handover and information related to a potential problem in a successful satellite handover.

41. A processor-readable storage medium, comprising: The processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to perform the method in any one of claims 1 to 19.

42. A computer program product, characterised in that, The computer program comprises computer instructions, and the computer instructions are executed by the processor to implement the steps of the method in any one of claims 1 to 19.

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