CN120835341A

CN120835341A - Information transmission method, device, terminal and network equipment

Info

Publication number: CN120835341A
Application number: CN202410457605.7A
Authority: CN
Inventors: 王睿炜; 彦楠; 刘子乔
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2024-04-16
Filing date: 2024-04-16
Publication date: 2025-10-24

Abstract

The present application provides an information transmission method, apparatus, terminal, and network device. The method, executed by the terminal, includes: recording first information, the first information including at least one of information related to a radio link failure (RLF) during satellite transformation and information related to potential problems during a successful satellite transformation; and sending the first information to a network device, the first information being used to assist in satellite-related mobility robustness optimization. The above solution, by recording at least one of information related to RLF during satellite transformation and information related to potential problems during a successful satellite transformation, and sending the recorded information to the network device, can assist the network side in satellite-related mobility robustness optimization, improve the success rate of satellite transformation, and ensure communication reliability.

Description

Information transmission method, device, terminal and network equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method, an information transmission device, a terminal, and a network device.

Background

In a non-terrestrial network (Non Terrestrial Network, NTN) scenario, satellite transformation can be supported by way of unchanged (unchanged) physical cell identity (PHYSICAL CELL IDENTIFIER, PCI), and access to a target by a User Equipment (UE) may be failed during satellite transformation due to a difference in satellite coverage or improper configuration of related parameters.

Disclosure of Invention

The embodiment of the application provides an information transmission method, an information transmission device, a terminal and network equipment, so as to avoid the problem that the terminal fails to access a target during satellite transformation.

In order to solve the above technical problem, an embodiment of the present application provides an information transmission method, which is executed by a terminal and includes:

recording first information comprising at least one of information related to a radio link failure, RLF, of a satellite transformation and information related to a potential problem in a successful satellite transformation procedure;

and sending the first information to network equipment, wherein the first information is used for assisting in optimizing the mobile robustness related to the satellite.

Optionally, the information related to RLF of satellite transformation includes at least one of:

the action type of the last trigger before the RLF occurs comprises at least one of satellite transformation, service link transformation, feed link transformation and inter-cell handover;

the time length information from the last triggering of satellite transformation or inter-cell handover execution to the occurrence of RLF before the occurrence of RLF;

the RLF occurs until the network device obtains the time length information of the first information;

the RLF occurs to the time length information of the terminal re-accessing the network;

accessing or attempting to access information of a target object, including a satellite and/or a cell, if a first condition is satisfied;

User identification information corresponding to an accessed or attempted accessed cell under the condition that the first condition is met;

triggering position information of a terminal when satellite transformation is performed;

the position information of the terminal when RLF occurs;

the position information of the terminal when the satellite transformation or the inter-cell handover is triggered last time before the RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

Before the last triggering of satellite transformation or inter-cell handover before RLF occurs;

after the last triggering of satellite change or inter-cell handover before RLF occurs;

After RLF occurs, triggering the Radio Resource Control (RRC) connection reestablishment process;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

triggering a measurement result of a target object accessed by a terminal before satellite transformation;

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

Triggering a measurement result of a target object which is tried to be accessed by a terminal after satellite transformation;

Triggering the measurement result of the neighbor cell of the target object which is tried to be accessed by the terminal after satellite transformation;

Measuring results of a target object accessed by the terminal when RLF occurs;

Measuring results of neighbor cells of a target object accessed by the terminal when RLF occurs;

Before the last satellite transformation or inter-cell handover before RLF occurs, the measurement result of the target object accessed by the terminal;

Before the last satellite transformation or inter-cell handover before RLF occurs, the terminal accesses the measurement result of the neighbor cell of the target object;

After the last satellite transformation or inter-cell handover before RLF occurs, the measurement result of the target object accessed by the terminal;

after the last satellite transformation or inter-cell handover before RLF occurs, the terminal accesses the measurement result of the neighbor cell of the target object.

Optionally, the information related to RLF of satellite transformation further includes:

and the time length covered by the source satellite and the target satellite accessed by the terminal in the satellite transformation process.

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

The service cell and neighbor cell service links of the network configuration transmit delay difference configuration information;

the service links of the service cell and the neighbor cell in the terminal auxiliary information have poor propagation delay;

Time offset between source satellite and target satellite uplink synchronization signal block SSB.

Optionally, the service link propagation delay difference configuration information of the service cell and the neighboring cell includes at least one of the following:

A service cell and neighbor cell service link propagation delay difference threshold;

Neighbor cell information list.

Optionally, the information related to the potential problem in the successful satellite transformation process includes at least one of:

The transformation type corresponding to successful satellite transformation comprises at least one of satellite transformation, service link transformation, feeder link transformation and inter-cell handover;

information of a target object accessed by a terminal before successful satellite transformation, wherein the target object comprises a satellite and/or a cell;

information of a target object accessed by the terminal after successful satellite transformation;

user identification information corresponding to a cell to which the terminal is connected before successful satellite transformation;

user identification information corresponding to a cell accessed by the terminal after successful satellite transformation;

the position information of the terminal when the satellite is successfully transformed;

the successful satellite transformation occurs to the time length information of the network equipment for acquiring the first information;

The cause of potential problems in successful satellite conversion processes;

and successfully transforming corresponding second measurement result information by the satellite.

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

Measuring results of target objects accessed by the terminal before successful satellite transformation;

Measuring results of neighbor cells of a target object accessed by a terminal before successful satellite transformation;

Measuring results of target objects accessed by the terminal after successful satellite transformation;

Measuring results of neighbor cells of a target object accessed by a terminal after successful satellite transformation;

Wherein the target object comprises at least one of a satellite and a cell.

Optionally, recording information related to potential problems in a successful satellite transformation process, including:

recording information related to potential problems in a successful satellite transformation process under the condition that the second condition is met;

wherein the second condition includes at least one of:

when the synchronization of the target satellite or the target cell is acquired, the proportion of the current value and the configuration value of the target timer is larger than or equal to the proportion threshold of the target timer;

When the synchronization of the target satellite or the target cell is acquired, the absolute value of the difference value between the current value and the configuration value of the target timer is smaller than or equal to the difference value threshold of the target timer;

the difference value between the time point of stopping service of the source satellite or the source cell and the time point of successful access of the terminal is smaller than or equal to the critical stopping service time length;

The length of time from the triggering of the satellite change to the successful acquisition of synchronization of the target satellite or target cell by the terminal is greater than or equal to the critical access time length.

Optionally, the method further comprises:

receiving configuration information sent by network equipment;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

The embodiment of the application also provides an information transmission method, which is executed by the network equipment and comprises the following steps:

Receiving first information sent by a terminal;

Wherein the first information is used to assist in performing satellite related mobile robustness optimization, and the first information includes at least one of information related to radio link failure, RLF, of a satellite transformation and information related to potential problems in a successful satellite transformation process.

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Optionally, the method further comprises:

Sending configuration information to a terminal;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

The embodiment of the application also provides a terminal, which comprises a memory, a transceiver and a processor:

The system comprises a memory for storing a computer program, a transceiver for receiving and transmitting data under the control of the processor, and a processor for reading the computer program in the memory and performing the following operations:

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

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

wherein the second condition includes at least one of:

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

receiving configuration information sent by network equipment;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

The embodiment of the application also provides a network device, which comprises a memory, a transceiver and a processor:

Receiving first information sent by a terminal through a transceiver;

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Sending configuration information to a terminal;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

The embodiment of the application also provides an information transmission device, which is applied to the terminal and comprises:

a recording unit configured to record first information including at least one of information related to a radio link failure RLF of a satellite transformation and information related to a potential problem in a successful satellite transformation process;

and the first sending unit is used for sending the first information to the network equipment, and the first information is used for assisting in optimizing the mobile robustness related to the satellite.

The embodiment of the application also provides an information transmission device, which is applied to network equipment and comprises:

the first receiving unit is used for receiving first information sent by the terminal;

The embodiment of the application also provides a processor-readable storage medium, which stores a computer program for causing the processor to execute the method.

Embodiments of the present application also provide a computer program product comprising computer instructions which, when executed by a processor, implement the steps of the method described above.

The beneficial effects of the application are as follows:

According to the scheme, at least one of the information related to the RLF of 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 in optimizing the mobile robustness related to the satellite, the success rate of satellite transformation is improved, and the communication reliability is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a block diagram of a network system suitable for use in embodiments of the present application;

FIG. 2 is a schematic flow chart of an information transmission method according to an embodiment of the application;

FIG. 3 is a second flow chart of an information transmission method according to an embodiment of the application;

fig. 4 shows one of unit diagrams of an information transmission device according to an embodiment of the present application;

Fig. 5 shows a structural diagram of a terminal according to an embodiment of the present application;

FIG. 6 is a second schematic diagram of an information transmission device according to an embodiment of the application;

Fig. 7 shows a block diagram of a network device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to implement embodiments of the application described herein, such as in a sequence other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, A and/or B, and can mean that A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The related concepts of the present application will be briefly described as follows.

1. Related configuration information of NTN

NTN configuration (NTN-Config) NTN auxiliary information providing parameters required for the UE to access NTN access of a New Radio, NR, including the following information:

An epoch time (epochTime) indicating a validation start time of the NTN auxiliary information;

NTN uplink synchronization validity period (NTN-UlSyncValidityDuration) the network configures the validity duration for NTN assistance information (i.e. serving cell and/or neighbor satellite ephemeris and common TA parameters), indicating the longest duration (calculated from epochTime) that the UE can apply assistance information without acquiring new assistance information;

Ephemeris information (ephemerisInfo) the satellite ephemeris information may be in the form of a position and velocity state vector or in the form of an orbit parameter;

Timing advance information (TA-Info) including common TA, and correlation drift (drift) correlation parameters;

Other information, such as TA report switch, time offset (offset), polarization information for uplink and downlink transmission, etc.

T-Service-time information indicating that the cell provided by the NTN system stops covering the current area. This field is applicable to service link switching in NTN quasi-fixed (quad-Earth fixed) and feeder link switching in NTN quad-Earth fixed and Earth moving systems.

NTN neighbor cell configuration list (NTN-NeighCellConfigList) providing a list of NTN neighbor cells including their NTN-Config, carrier frequency and PCI;

reference location (referenceLocation) reference location of serving cell provided by NTN quasi-stationary system for location-based measurement initiation in radio resource control IDLE state (rrc_idle) and radio resource control INACTIVE state (rrc_inactive).

The mobile reference location (movingReferenceLocation) is the reference location of the serving cell of the NTN Earth moving system at a certain time reference point. For use in location-based measurement triggers in rrc_idle and rrc_inactive. The time reference of this field is indicated by epochTime in ntn-Config of the serving cell;

a distance threshold (DISTANCETHRESH) from the serving cell reference location for location-based measurement initiation in rrc_idle and rrc_inactive;

A sat switch with resynchronization (SATSWITCHWITHRESYNC) providing cell support unchanged PCl satellite transformation, target satellite parameters required to perform satellite transformation and resynchronization, including NTN assistance information for the target satellite, offset between source and target Satellite Synchronization Block (SSB) required for possible soft satellite transformation, and start time for the target satellite to provide coverage.

Non-random access handover (rach-LessHO) related parameters, including related timing advance TA and grant (grant) information for the UE to perform the non-random access handover.

2. Unchanged PCI satellite transformation mechanism of NTN, namely unchanged PCI mechanism for short

For a Quasi-Earth-fixed (quick-Earth-fixed) system in NTN, a satellite will cover a fixed geographic area for a period of time without changing until the satellite leaves. When the satellite (satellite 0) currently providing coverage leaves and another satellite (satellite 1) continues to provide coverage, the Cell (Cell 1) to be provided with coverage can provide the same coverage as the current serving Cell (Cell 0) according to reasonable satellite orbit layout and beam design. And the same ground base station provides service, and the same service can be provided for the same area through two different satellites, so that the UE connected to the base station can use the same radio resource configuration, and therefore a unchanged PCI mechanism can be used, so that the UE does not need to trigger a switching process to change a service cell, and only acquires uplink and downlink synchronization with a target satellite again, thereby avoiding the sending of a switching command in the switching process, saving the cost and reducing the interruption time delay of data transmission. unchanged PCI mechanisms include two scenarios:

Hard satellite conversion (HARD SATELLITE SWITCH) the service satellite switches at a fixed time T, the source satellite serving before time T and the target satellite serving after time T. The terminal stops transmission with the source cell at the moment T and starts to execute the downlink synchronization process with the target satellite;

soft satellite conversion (soft SATELLITE SWITCH) the source satellite and the target satellite can provide service/coverage for (almost) the same area over a period of time.

3. Self-organizing network (Self-Organizing Network, SON) record reporting for UE

The SON record reporting of the UE includes:

CEF report, recording the information of RRC establishment failure/recovery failure of UE side, and then sending result available indication to network, reporting the relative record content after receiving network side request;

A radio link failure/handover failure report (RLF/HOF report) records the information of the radio link failure/handover failure of the UE side, and then sends a result available indication to the network, and reports the related record content after receiving the request of the network side;

A random access report (RA report) is used for recording the information of random access failure/success of the UE side and reporting the related record content after the subsequent request of the network side is received;

Reporting (Successful Handover Report, SHR/Successful PSCell (Addition/change) Report, SPR) successful switching Report/successful PSCell (adding/changing) Report, recording information of successful switching critical failure/successful PSCell adding or changing critical failure occurring on UE side, and sending available indication of result to network, reporting related record content after receiving request of network side;

The RLF report contains the following:

A measurement result of a service cell on the terminal;

The terminal confirms the neighbor cell measurement result after the switching failure or the radio link failure;

Terminal position information;

Terminal failure cell identification information, such as global cell identification (Cell Global Identity, CGI)/pci+ frequency point;

The terminal reestablishes cell identification information;

the UE reports a timer, namely, the terminal confirms the last time that the switching initiating message is received until the connection fails to experience time length;

The connection failure causes, the handover failure or the radio link failure;

A cell radio network temporary identity (Cell Radio Network Temporary Identifier, C-RNTI) used when the terminal connection fails;

a radio link failure sub-cause, T310 timeout or random access problem or a maximum retransmission or beam recovery failure (Beam Failure Recovery Failure, BFRF) by the radio link control (Radio Link Control, RLC) layer;

the terminal reports the time length of the RLF report experience to the terminal after confirming the connection failure;

tracking area identity (TRACKING AREA Code, TAC) of the connection failure cell;

Bluetooth (BT) related record results;

A wireless local area network (Wireless Local Area Network, WLAN).

Under unchanged PCI satellite transformation mechanism, the new satellite takes over to cover the old satellite, but the new and old satellites cannot be completely identical in coverage due to the difference between satellites, such as the difference of position, altitude, parameter configuration, etc. If there is coverage degradation in some locations, satellite transformation failure or RLF may result. It is also possible that the NTN parameters of the network configuration are not appropriate, resulting in failure of the UE to successfully access the target satellite. It is necessary to record the relevant failure information in order to identify the problem and optimize the network for resolution. The embodiment of the application provides a method for identifying and solving the problems.

Embodiments of the present application are described below with reference to the accompanying drawings. The information transmission method, the information transmission device, the terminal and the network equipment provided by the embodiment of the application can be applied to a wireless communication system. The wireless communication system may be a system employing a fifth generation (5th Generation,5G) mobile communication technology (hereinafter, simply referred to as a 5G system), and those skilled in the art will appreciate that the 5G NR system is only an example and not a limitation.

Referring to fig. 1, fig. 1 is a block diagram of a network system to which the embodiment of the present application is applicable, and as shown in fig. 1, the network system includes a User terminal 11 and a base station 12, where the User terminal 11 may be a User Equipment (UE), for example, a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a personal digital assistant (PDA for short), a Mobile internet device (Mobile INTERNET DEVICE, MID), or a Mobile device (Wearable Device), and the embodiment of the present application is not limited to a specific type of the User terminal 11. The base station 12 may be a 5G or later base station (e.g., a gNB, a 5G NR NB), or a base station in other communication systems, or referred to as a node B, and in the embodiment of the present application, only a 5G base station is taken as an example, but the specific type of the base station 12 is not limited.

The method and the device are based on the same application, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

As shown in fig. 2, an embodiment of the present application provides an information transmission method, which is executed by a terminal and includes:

Step S201, recording first information, wherein 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;

step S202, transmitting the first information to a network device, where the first information is used to assist in optimizing mobile robustness related to satellites.

It should be noted that, in the embodiment of the present application, by recording at least one of information related to RLF of satellite transformation and information related to potential problems in a successful satellite transformation process, and sending the recorded information to a network device, the network side can be assisted to perform mobile robustness optimization related to satellites, thereby improving success rate of satellite transformation and ensuring reliability of communication.

It should be noted that, the terminal sending the first information to the network device refers to that the terminal sends the first information to the corresponding network device that needs to obtain the first information through the satellite, where the network device may be an access network device corresponding to a Source (Source) satellite to which the terminal accesses, where the terminal needs to send the first information to the access network device corresponding to the last accessed satellite first, and then the access network device forwards the first information to the access network device corresponding to the Source satellite, where optionally, 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, a forwarding process is not needed.

For example, the network side may perform satellite coverage optimization and/or satellite transformation optimization based on the first information, so as to improve the success rate of satellite transformation.

It should be noted that, in the embodiment of the present application, the method may be applied to satellite transformation that does not change the physical cell identifier (unchanged PCI) or satellite transformation that changes the physical cell identifier (CHANGED PCI).

It should be noted that RLF of satellite transformation may include several scenarios including failure of hard satellite transformation, failure of soft satellite transformation, and failure of satellite transformation soon after success (including failure of hard satellite transformation soon after success, failure of soft satellite transformation soon after success).

It should be noted that the potential problem in a successful satellite transformation process may be understood as that the satellite transformation is successful, but is only successful in the case of a critical failure, which may also be referred to as a critical successful satellite transformation.

The following describes the respective cases in detail.

1. RLF of satellite transformation

Optionally, in one implementation, the information related to RLF of satellite transformation includes at least one of:

a101, the action type triggered last time before RLF occurs, wherein the action type comprises at least one of satellite transformation, service link (SERVICE LINK) transformation, feeder link (FEEDER LINK) transformation and inter-cell handover;

It should be noted here that if the satellite transformation or the service link transformation is performed, the hard satellite transformation or the soft satellite transformation is optionally further indicated. The failure cause or the connection failure type in the RLF report may be used for recording, or the information record may be newly added.

A102, triggering satellite transformation or inter-cell handover execution to time length information of RLF from the last time before the RLF occurs;

this information is used to record the length of time that triggers a satellite change or an inter-cell handover to RLF.

It should be noted that, the time length information may assist the network side in determining whether the RLF is related to the action that has been triggered the last time, such as satellite transformation or inter-cell handover, and if so, the type of action that has been triggered the last time before the RLF is optimized, for example, the last action is satellite transformation, inter-cell handover, and so on.

A103, the time length information of the first information is obtained from the RLF occurrence to the network equipment;

it should be noted that, the time length information may assist the network side to acquire the stored context information.

A104, the time length information of the RLF to the terminal re-access network;

it should be noted that the time length information may assist the network side in judging whether the re-accessed network cell can be used as a target cell of a mobile candidate, and if the time is too long, it means that the re-accessed network and RLF have a small relationship, and cannot be used as a candidate target cell selected after failure.

A105, accessing or attempting to access information of a target object, wherein the target object comprises a satellite and/or a cell, under the condition that the first condition is met;

For example, recorded herein are satellite information of a satellite accessing or attempting to access and/or cell information of a cell. The satellite information may be satellite identification or ephemeris information and the cell information may be cell identification information, for example.

Optionally, the first condition includes at least one of:

A1051, before satellite transformation triggering;

a1052, satellite transformation;

before the satellite transformation or the inter-cell handover is triggered the last time before the occurrence of the A1053 and the RLF;

after the satellite transformation or the inter-cell handover is triggered last time before the occurrence of the RLF of a 1054;

After the occurrence of the RLF, a1055 is generated and in the process of triggering the re-establishment of the Radio Resource Control (RRC) connection;

After A1056 and RLF occur;

a1057, RLF occurs and triggers a failure of RRC connection re-establishment.

It should be noted that, by recording information of the target object accessed or attempted to be accessed at different stages of satellite transformation, the terminal can assist the network side to perform optimization of the target cell of satellite transformation, that is, failure occurs in the process of transforming from the source satellite to the target satellite, and optimization needs to be performed for the satellite transformation. Satellite transformation failure may be embodied in RLF failure and may require recording information of a target object accessed by the terminal before and after RLF failure. The target object accessed before the RLF occurs may have RLF occurrence caused by unreasonable parameter configuration, and the target object accessed by the terminal in the cell selection process after the RLF occurrence may be the current optimal target cell, and may be used as the target cell to be selected such as satellite transformation or inter-cell handover. If the RLF triggers the RRC connection reestablishment process after the RLF occurs, the cell accessed by the RRC connection reestablishment can also be used as the optimal candidate target cell.

A106, user identification information corresponding to the accessed or attempted accessed cell under the condition that the first condition is met;

It should be noted that, recording the user identification information corresponding to the cell is convenient for the network to identify the specific user and search the user context information held by the network.

A107, triggering position information of the terminal when satellite transformation is triggered;

A108, the position information of the terminal when RLF occurs;

A109, the position information of the terminal when the satellite transformation or the inter-cell handover is triggered last time before RLF occurs;

It should be noted that, through the above-mentioned a107-a109, the terminal records the position information of the satellite transformation at different stages, so as to assist the network side in judging the specific position where the failure occurs, and optimize the mobility for the terminal at the fixed location.

A110, first measurement result information corresponding to RLF;

optionally, in one implementation, the first measurement result information includes at least one of:

a1101, triggering a measurement result of a target object accessed by a terminal before satellite transformation;

a1102, triggering a measurement result of a neighbor cell of a target object accessed by a terminal before satellite transformation;

a1103, triggering a measurement result of a target object which is tried to be accessed by the terminal after satellite transformation;

Alternatively, since the satellite transformation cell identifier under unchanged PCI may not be changed, and the PCI and the frequency point may not be changed, but the beams of the terminal receiving the source satellite and the target satellite may be different, when recording the measurement results corresponding to the source satellite and the target satellite, it may be necessary to record separately, and the difference of the measurement results is reflected by the different beams.

A1104 triggers the measurement result of the neighbor cell of the target object which the terminal tries to access after satellite transformation;

A1105, measuring results of a target object accessed by the terminal when RLF occurs;

A1106, measuring results of neighbor cells of a target object accessed by the terminal when RLF occurs;

A1107, before the last satellite transformation or inter-cell handover before RLF occurs, the terminal accesses the measurement result of the target object;

A1108, before the last satellite transformation or inter-cell handover before RLF occurs, the measurement result of the neighbor cell of the target object accessed by the terminal;

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

A1110, after the last satellite transformation or inter-cell handover before RLF occurs, the terminal accesses the measurement result of the neighbor cell of the target object.

It should be noted that, through reporting the first measurement result, the network side can be assisted to judge whether the coverage condition of the satellite or the cell is tried to be accessed, if so, the terminal service can be continued well, and if the coverage is not good, other target satellites can be selected to continue service, or the coverage of the target satellites can be enhanced to optimize.

Optionally, in one implementation manner, the information related to RLF of satellite transformation further includes:

Alternatively, the length of time may be represented by the difference between t-Service-r17 in SIB19 at the point currently indicating the current cell Service end time and t-SERVICESTART-r18 in the target satellite SATSWITCHWITHRESYNC structure at the point indicating the start time.

It should be noted that, this case is applicable to a soft satellite transformation scenario, that is, in the soft satellite transformation scenario, the terminal may record, in addition to any information in the foregoing a101-a110, a time length covered by the source satellite and the target satellite accessed by the terminal in the satellite transformation process, so as to assist the network side in optimizing satellite coverage.

Alternatively, for RLF of satellite transformation, it may also be caused by improper NTN configuration, and the terminal may record the configuration of NTN when RLF fails or fails critically, so that the network optimizes the configuration of NTN.

For example, the network configures the SSB-TimeOffset parameter to the terminal via SIB19, which indicates the time interval for uplink synchronization SSB for the source satellite and the target satellite. The terminal calculates the measurement time of the target satellite SSB based on the parameter and in combination with other parameters in the NTN configuration. If ssb-TimeOffset parameter configuration is inaccurate, the terminal cannot acquire uplink synchronization of the target satellite.

The ssb-TimeOffset parameter of the network configuration is calculated by propagationDelayDifference parameter in UEAssistanceInformation messages reported by the terminal, and the parameter represents the service link propagation delay difference of the service cell and the neighbor cell. The parameter includes a difference of at most 4 target cells. The terminal reports the value according to the configuration information propDelayDiffReportConfig of the network, optionally, the specific format of propDelayDiffReportConfig is as follows:

Network configuration propDelayDiffReportConfig gives the terminal threshPropDelayDiff that the service links of the serving cell and the neighbor cells propagate a delay difference threshold, that is, a threshold for triggering reporting, and neighCellInfoList that up to maxCellNTN (the value is 4) neighbor cells can be configured. After the terminal receives the configuration, after meeting the condition, the service link propagation delay difference of the service cell and the neighbor cell is reported through propagationDelayDifference in UEAssistanceInformation information, and the network recalculates the ssb-TimeOffset parameter and configures the ssb-TimeOffset parameter to the terminal through SIB 19.

It can be seen from the above analysis that if the ssb-time offset parameter configuration is inaccurate, and the terminal cannot acquire the uplink synchronization of the target satellite, and the ssb-time offset parameter needs to be corrected, the parameters related to the calculation need to be recorded, and the source of the problem is found.

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

a21, service cell and adjacent cell service link propagation delay difference configuration information (propDelayDiffReportConfig) configured by the network;

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

a212, neighbor cell information list (neighCellInfoList);

Optionally, the neighbor cell information list includes specifically configured neighbor cell information.

A22, service links of the serving cell and the neighbor cell in the terminal auxiliary information (UEAssistanceInformation) are poor in propagation delay (propagationDelayDifference);

a23, time offset (SSB-time offset) between the source satellite and the target satellite uplink synchronization signal block SSB.

It should be noted that, by recording at least one of the above-mentioned a21-a23, whether the network analysis related parameter configuration is accurate or not can be enabled, for example, according to the statistical result, the success rate of the terminal at the same position under which configuration is high and the success rate of which configuration is low, so that the next configuration is more reasonable, and the success rate is improved.

Note that, a21 to a23 may be recorded in a corresponding report together with any of the information items a101 to a110 described above, or may be newly added.

Different implementation scenarios in this case are illustrated below.

Hard satellite transform failure for application case one unchanged PCI

Unchanged PCI upon triggering a hard satellite change, the terminal attempts to access the new satellite, and if the new satellite fails to provide effective coverage, the terminal may generate RLF, and according to the existing implementation, the terminal records RLF reports, the content including the cell identity where the failure occurred, the failure being due to RLF, and time information. After the network acquires the RLF report, the hard satellite transformation cannot be optimized according to the above, and the RLF report needs to be enhanced to record the failure information of the hard satellite transformation, or other SON reports are used, or a new report is added to record the failure information of the hard satellite transformation.

RLF occurs after satellite change trigger unchanged PCI and the information to be recorded includes, but is not limited to, the following:

s101, the last triggering action type before RLF includes but is not limited to satellite transformation, service link transformation, feed link transformation and inter-cell handover;

Optionally, if a satellite transformation or a service link transformation, optionally, further indicating a hard satellite transformation or a soft satellite transformation. The failure cause or the connection failure type in the RLF report may be used for recording, or the information record may be newly added.

S102, triggering satellite transformation or inter-cell handover execution to time length information of RLF before the RLF happens last time;

S103, before triggering satellite transformation, when the satellite transformation is performed, before the satellite transformation or inter-cell switching is performed last time before the RLF occurs, after the RLF occurs and in the process of triggering the radio resource control RRC connection reestablishment, after the RLF occurs, and/or after the RLF occurs and after triggering the RRC connection reestablishment failure, satellite information corresponding to the accessed satellite and/or satellite information corresponding to the satellite attempting to be accessed can be satellite identification or ephemeris information.

S104, triggering position information of the terminal when satellite transformation is triggered and/or position information of the terminal when RLF occurs;

S105, before triggering satellite transformation, when the satellite transformation happens, before the satellite transformation or inter-cell switching is triggered last time before the RLF happens, after the RLF happens, and in the process of triggering the RRC connection reestablishment, after the RLF happens, and/or after the RLF happens, and after triggering the RRC connection reestablishment failure, the terminal accesses or attempts to access the cell identification information of the cell, and the cell accessed by the terminal is also possibly changed before and after the satellite transformation, so that the cell accessed before the satellite transformation triggering and the cell attempting to access after the satellite transformation triggering need to be recorded;

s106, before triggering satellite transformation, when the satellite transformation is performed, before the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, after the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, and in the process of triggering the Radio Resource Control (RRC) connection reestablishment, after the RLF occurs, and/or after the RLF occurs, and after the RRC connection reestablishment failure is triggered, the terminal is accessed or tries to access the corresponding user identification information of the cell;

further, the identification of the user in the cell is recorded on the basis of recording the cell identification information as above. The network is convenient to identify specific users and search the user context information held by the network.

S107, the RLF occurs until the network equipment acquires the time length information of the recorded information;

The time length information is used to assist the network in locating user context information.

S108, the time length information of the RLF to the terminal re-access network;

S109, the first measurement result information corresponding to the RLF includes, but is not limited to, the following:

Measuring results of a target object accessed by the terminal when RLF occurs;

After the network equipment receives the recorded information, the network equipment can know whether the failure is related to the latest triggering satellite transformation or switching according to the time length information from the latest triggering satellite transformation execution to the occurrence of RLF, if so, the satellite transformation or switching is optimized, whether the coverage condition of the attempted access satellite or cell can be well continued to serve the terminal or not is judged according to the measurement result, and if the coverage is not good, other target satellites can be selected to continue to serve or the coverage of the target satellites is enhanced to be optimized.

Soft satellite transform failure for application case two unchanged PCI

After unchanged PCI soft satellite change triggers, the terminal attempts to access the new satellite, which may not be able to access the new target satellite if the new satellite does not provide effective coverage. After the old original satellite cannot continue to provide service, the terminal will generate RLF, the terminal records RLF report, and the content includes the cell identifier of the failure, where the failure is due to RLF failure and time information.

After the network acquires the RLF report, the soft satellite transformation cannot be optimized according to the above, and the RLF report needs to be enhanced to record the failure information of the soft satellite transformation, or other SON reports or the soft satellite transformation failure information of the newly added report record unchanged PCI are used.

The information to be recorded is the same as the application case, and when the only different terminal is in soft handover, optionally, the difference between t-Service-r17 of the current point indicating the Service end time of the current cell in the SIB19 and t-SERVICESTART-r18 of the start point indicating the start time in the structure of the target satellite SATSWITCHWITHRESYNC can also be recorded, which indicates the common coverage time length of the source satellite and the target satellite.

Satellite transformation of application case III unchanged PCI fails quickly after success

Unchanged PCI after soft satellite transformation or hard satellite transformation is triggered, the terminal successfully accesses a new satellite or cell, but RLF happens soon, the terminal records RLF report, the content includes the cell identification that the failure happens, and the failure is due to RLF failure and time information.

After the network acquires the RLF report, the satellite transformation of unchanged PCI cannot be optimized according to the above, and the RLF report needs to be enhanced to record the failure information of the satellite transformation, or other SON reports or newly added report records the failure information of the satellite transformation of unchanged PCI.

The information to be recorded includes, but is not limited to, the following:

s201, the last triggering action type before RLF includes but is not limited to satellite transformation, service link transformation, feed link transformation and inter-cell handover;

S202, triggering satellite transformation or inter-cell handover execution to time length information of RLF before the RLF happens last time;

S203, before triggering satellite transformation, when the satellite transformation is performed, before the satellite transformation or inter-cell switching is performed last time before the RLF occurs, after the RLF occurs and in the process of triggering the RRC connection reestablishment, after the RLF occurs and/or after the RLF occurs and after triggering the RRC connection reestablishment failure, satellite information corresponding to the accessed satellite and/or satellite information corresponding to the satellite attempting to be accessed can be satellite identification or ephemeris information.

S204, triggering position information of the terminal when satellite transformation is triggered and/or position information of the terminal when RLF occurs;

S205, before triggering satellite transformation, when the satellite transformation is performed, before the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, after the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, and in the process of triggering the Radio Resource Control (RRC) connection reestablishment, after the RLF occurs, and/or after the RLF occurs, and after the RRC connection reestablishment failure is triggered, the terminal accesses or attempts to access the cell identification information of the cell. Before the RLF occurs, recording satellite transformation or inter-cell transformation triggered by the last terminal, and recording a cell accessed before triggering and a cell accessed after triggering of the satellite transformation or the inter-cell transformation;

s206, before triggering satellite transformation, when the satellite transformation is performed, before the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, after the satellite transformation or inter-cell switching is triggered last time before the RLF occurs, and in the process of triggering the Radio Resource Control (RRC) connection reestablishment, after the RLF occurs, and/or after the RLF occurs, and after the RRC connection reestablishment failure is triggered, the terminal is accessed or tries to access the corresponding user identification information of the cell;

S207, time length information of the recorded information is obtained from the RLF occurrence to the network equipment;

This length of time is used to assist the network in locating user context information.

S208, the time length information of the RLF to the terminal re-access network;

the first measurement result information corresponding to S209 and RLF may include, but is not limited to, the following:

measuring results of satellites and/or cells accessed by the terminal when RLF occurs;

measuring results of satellites accessed by the terminal and/or neighbor cells of the cells when RLF occurs;

before the last satellite transformation or inter-cell handover before RLF occurs, the measurement result of the satellite and/or cell accessed by the terminal;

before the last satellite change or inter-cell handover before RLF occurs, the terminal accesses the satellite and/or the measurements of the neighbor cells of the cell.

After the network equipment receives the recorded information, the network equipment can know whether the failure is related to the latest triggering satellite transformation or switching according to the time length information from the latest triggering satellite transformation or switching execution to the occurrence of satellite transformation failure or RLF, if so, the satellite transformation or switching is optimized, whether the coverage condition of the attempted access satellite or cell can be well continued to serve the terminal or not is judged according to the measurement result, and if the coverage is not good, other target satellites can be selected to continue to serve or the coverage of the target satellites is enhanced to be optimized.

Alternatively, the last time mentioned in the embodiments of the present application can be understood as the last time or the previous time.

2. Potential problems in successful satellite conversion processes

Optionally, in one implementation, the information related to the potential problem in the successful satellite transformation process includes at least one of the following:

B11, a transformation type corresponding to successful satellite transformation, wherein the transformation type comprises at least one of satellite transformation, service link transformation, feed link transformation and inter-cell handover;

In the case of satellite transformation or service link transformation, the method may further indicate hard satellite transformation or soft satellite transformation.

B12, information of a target object accessed by the terminal before successful satellite transformation, wherein the target object comprises satellites and/or cells;

For example, recorded herein are satellite information of an accessed satellite and/or cell information of a cell. The satellite information may be satellite identification or ephemeris information and the cell information may be cell identification information, for example.

B13, information of a target object accessed by the terminal after successful satellite transformation;

It should be noted that, by recording the accessed satellite information and cell identification information before and/or after satellite transformation, the terminal can assist the network side in judging the scene of satellite transformation, that is, the mobility process from the source satellite to the target satellite has potential problems, and needs to perform actions from the source satellite to the target satellite, for example, optimizing the satellite transformation.

B14, user identification information corresponding to a cell accessed by the terminal before successful satellite transformation;

B15, user identification information corresponding to the cell accessed by the terminal after successful satellite transformation;

B16, the position information of the terminal when the satellite is successfully transformed;

It should be noted that, by recording the location information, the network side can be assisted to determine the specific location where the potential problem occurs, and the location can be analyzed and optimized.

B17, obtaining time length information of the first information from the successful satellite transformation to the network equipment;

It should be noted that, the time length information may assist the network side in searching for the context information of the terminal.

B18, the cause of potential problems in the successful satellite transformation process;

Optionally, the reason includes, but is not limited to, at least one of the reason T310, the source satellite or the source cell critical outage, the long synchronization time to acquire the target satellite or the target cell.

B19, the second measurement result information corresponding to successful satellite transformation;

optionally, the second measurement result information includes at least one of:

b191, measuring results of target objects accessed by the terminal before successful satellite transformation;

B192, measuring results of neighbor cells of the target object accessed by the terminal before successful satellite transformation;

b193, measuring results of target objects accessed by the terminal after successful satellite transformation;

and B194, measuring results of neighbor cells of the target object accessed by the terminal after successful satellite transformation.

It should be noted that, by reporting the second measurement result, the network side can be assisted to judge whether the coverage condition of the satellite or the cell is tried to be accessed, if so, the terminal service can be continued well, and if the coverage is not good, other target satellites can be selected to continue service, or the coverage of the target satellites can be enhanced to optimize.

Optionally, in one implementation, recording information related to a potential problem in a successful satellite transformation process includes:

wherein the second condition includes at least one of:

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

alternatively, the target timer in the embodiment of the present application may be a T310 timer.

In a hard satellite or soft satellite transition scenario, since the T310 timer times out (i.e., when the current value of the T310 timer increases to the T310 configuration value) will trigger RLF, it may be determined whether the ratio is critically successful by determining the ratio of the current value of the T310 timer to the T310 configuration value when synchronization of the target satellite or cell is successfully acquired. In order to accomplish the above-mentioned judgment, the network device needs to configure a proportion threshold of T310 to the terminal, and when the synchronization of the target satellite or the target cell is successfully obtained, the proportion of the current value of the T310 timer and the configuration value of T310 is greater than (corresponding to mathematical symbol >) or greater than or equal to (corresponding to mathematical symbol ∈r) the proportion threshold of T310, that is, the proportion threshold indicates that the threshold is successful.

C12, when the synchronization of the target satellite or the target cell is acquired, the absolute value of the difference value between the current value and the configuration value of the target timer is smaller than or equal to the difference threshold of the target timer;

In a hard satellite or soft satellite transition scenario, since the T310 timer time out (i.e., when the current value of the T310 timer increases to the T310 configuration value) will trigger RLF, it may be determined whether the difference between the current value of the T310 timer and the T310 configuration value was critical success or not, based on the absolute value of the difference, when synchronization of the target satellite or cell was successfully acquired. In order to complete the judgment, the network configures a T310 difference threshold for the terminal, and when the synchronization of the target satellite or the target cell is successfully acquired, the absolute value of the difference between the current value of the T310 timer and the T310 configuration value is smaller than (corresponding to mathematical symbol <) or larger than or equal to (corresponding to mathematical symbol less than or equal to) the T310 difference threshold, namely the threshold is expressed as critical success.

C13, the difference value between the service stopping time point of the source satellite or the source cell and the time point of the terminal successfully accessed is smaller than or equal to the critical service stopping time length;

It should be noted that, under soft satellite transformation, it is also possible to determine that the threshold success is determined by determining whether the source satellite or the source cell has approached the point of time of stopping service when the terminal acquires synchronization of the target satellite or the target cell. Meaning that the source satellite or cell has come close to a stop service, the terminal has completed acquiring synchronization of the target satellite or cell. To accomplish the above-mentioned determination, it may be achieved by configuring a critical stop Service time length, if (t-Service of the source cell (the parameter indicates the stop Service time point) -the current time) is less than or equal to the configured critical stop Service time length, i.e. indicates a critical success. Of course, the occurrence of the event may be determined by other configurations, and the specific implementation is not limited.

C14, the time length from satellite transformation triggering to the terminal successfully acquiring the synchronization of the target satellite or the target cell is greater than or equal to the critical access time length;

It should be noted that the time period from the triggering of satellite transformation to the successful acquisition of synchronization of the target satellite or the target cell by the terminal may also be used to determine the critical success. This may be achieved by configuring a critical access time length, which indicates a critical success if the time length from the triggering of the satellite change to the successful acquisition of synchronization of the target satellite or cell by the terminal is greater than or equal to the configured critical access time length. Of course, the time length for the terminal to acquire the synchronization of the target satellite or the cell can be determined to be too long through other configurations, and the specific implementation manner is not limited.

Optionally, in one implementation manner, the method further includes:

receiving configuration information sent by network equipment;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

Alternatively, the configuration information may be sent to the terminal through SIB19 or dedicated signaling by the terminal.

This is illustrated below.

Satellite transformation optimization for unchanged PCI with critical success for application case four

The satellite transformation of unchanged PCI with critical success refers to that the satellite transformation is successful, but in the process of accessing a target satellite or a cell, the situation that the critical success occurs, in this scenario, the network side needs to configure configuration information for determining whether the critical success occurs for the terminal, where the configuration information includes but is not limited to:

t310 proportional threshold;

t310 difference threshold;

the critical stopping service time length, namely judging information of a critical stopping service time point of a source satellite or a source cell when the terminal acquires synchronization of a target satellite or cell;

And the critical access time length is the time length information of successfully acquiring the synchronization of the target satellite or the target cell.

The configuration information may be sent to the terminal through SIB19 or dedicated signaling of the terminal.

And when the terminal successfully acquires the synchronization of the target satellite or the target cell, judging whether critical success occurs or not according to the configuration information. And judging that the critical success occurs when any condition is met. The critical success information may be recorded in the SHR report, or in other SON reports, or in a new report.

The information to be recorded includes, but is not limited to, the following:

S301, a transformation type corresponding to successful satellite transformation, including but not limited to satellite transformation, service link transformation, feeder link transformation and inter-cell handover;

if a satellite transformation or a service link transformation, optionally, a hard satellite transformation or a soft satellite transformation is further indicated.

S302, satellite information accessed by the terminal before successful satellite transformation and/or satellite information accessed by the terminal after successful satellite transformation can be satellite identification or ephemeris information, and because the cell may not change under satellite transformation, the coverage of the satellite needs to be optimized, and the configuration information of the cell is not related.

S303, the position information of the terminal when the satellite is successfully transformed;

s304, successful satellite transformation or cell identification information of a cell accessed before and a cell accessed after inter-cell handover;

S305, user identification information corresponding to an accessed cell and a later accessed cell before successful satellite transformation or inter-cell handover;

That is, on the basis of recording the cell identification information in S304, further, the identification of the user in the cell is recorded. The network is convenient to identify specific users and search the user context information held by the network.

S306, obtaining the time length information of the recorded information from the successful satellite transformation to the network equipment;

S307, reasons for critical successful satellite transformation;

Specifically, the method comprises the steps of, but is not limited to, T310, critical stopping service of a source satellite or a source cell, long synchronization time of acquiring a target satellite or a target cell and the like.

S308, second measurement result information, including but not limited to the following:

measuring results of satellites and/or cells accessed by a terminal before successful satellite transformation;

Measuring results of satellites and/or neighbor cells of cells accessed by a terminal before successful satellite transformation;

measuring results of satellites and/or cells accessed by the terminal after successful satellite transformation;

and measuring results of satellites accessed by the terminal and/or neighbor cells of the cells after successful satellite transformation.

After the network equipment receives the recorded information, whether the coverage condition of the attempted access satellite or the cell can be well continued to serve the terminal or not can be judged according to the measurement result, and if the coverage is not good, other target satellites can be selected to continue to serve or the coverage of the target satellites can be enhanced to optimize.

It should be noted that, in the conventional handover, a synchronous RRC reconfiguration message is sent to the terminal, but the RRC reconfiguration message is not sent to the terminal in the satellite transformation process of unchanged PCI. The information recorded in the conventional SON report is mostly based on the handover procedure, i.e. the synchronized RRC reconfiguration message, which is no longer applicable to the satellite change procedure of record unchanged PCI, and the satellite change scenario is different from the conventional handover. In order to complete optimization of satellite transformation, at least one embodiment of the application enhances the RLF of satellite transformation and/or recorded information under the satellite transformation scene of critical success, assists the network side to complete network optimization of satellite transformation, and improves the success rate of access.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, applicable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (GENERAL PACKET Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR) systems, and the like. Terminals (also referred to as terminal devices) and network devices are included in these various systems. Core network parts may also be included in the system, such as Evolved packet system (Evolved PACKET SYSTEM, EPS), 5G system (5 GS), etc.

The terminal according to the embodiment of the present application may also be referred to as a terminal device, and may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as Personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal DIGITAL ASSISTANT, PDA) and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (ACCESS TERMINAL), user terminal device (user terminal), user agent (user agent), user equipment (user device), and embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for the terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be configured to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiment of the present application. In some network structures, the network devices may include centralized unit (centralized unit, CU) nodes and Distributed Unit (DU) nodes, which may also be geographically separated.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may be made between the network device and the terminal device, each using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

As shown in fig. 3, an embodiment of the present application provides an information transmission method, which is executed by a network device, and includes:

Step S301, receiving first information sent by a terminal;

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Optionally, the method further comprises:

Sending configuration information to a terminal;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

It should be noted that, all the implementation manners in the above embodiments are applicable to the embodiment of the information transmission method applied to the network device side, and the same technical effects can be achieved, which is not described herein again.

As shown in fig. 4, an embodiment of the present application provides an information transmission apparatus 400, applied to a terminal, including:

A recording unit 401 for recording first information, the first information comprising at least one of information related to a radio link failure RLF of a satellite transformation and information related to a potential problem in a successful satellite transformation procedure;

a first sending unit 402, configured to send the first information to a network device, where the first information is used to assist in performing satellite related mobile robustness optimization.

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Optionally, the recording unit 401 is configured to:

wherein the second condition includes at least one of:

Optionally, the apparatus further comprises:

the second receiving unit is used for receiving the configuration information sent by the network equipment;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

It should be noted that, the embodiment of the device is a device corresponding to the embodiment of the method, and all the implementation manners in the embodiment of the method are applicable to the embodiment of the device, so that the same technical effects can be achieved.

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. The storage medium includes a U disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

As shown in fig. 5, the embodiment of the present application further provides a terminal, which includes a processor 500, a transceiver 510, a memory 520, and a program stored in the memory 520 and capable of running on the processor 500, wherein the transceiver 510 is connected to the processor 500 and the memory 520 through a bus interface, and the processor 500 is configured to read the program in the memory, and execute the following procedures:

A transceiver 510 for receiving and transmitting data under the control of the processor 500.

Wherein in fig. 5, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 500 and various circuits of memory represented by memory 520, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, etc. The user interface 530 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

Alternatively, the processor 500 may 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 may also employ a multi-core architecture.

The processor is operable to perform any of the methods provided by embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in a memory. The processor and the memory may also be physically separate.

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

wherein the second condition includes at least one of:

receiving configuration information sent by network equipment;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

It should be noted that, the terminal provided by the embodiment of the present application can implement all the method steps implemented by the embodiment of the method and achieve the same technical effects, and the parts and beneficial effects that are the same as those of the embodiment of the method in the embodiment are not described in detail herein.

The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the information transmission method applied to the terminal. The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile storage (NAND FLASH), solid State Disk (SSD)), etc.

As shown in fig. 6, an embodiment of the present application provides an information transmission apparatus 600, applied to a network device, including:

a first receiving unit 601, configured to receive first information sent by a terminal;

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Optionally, the apparatus further comprises:

the second sending unit is used for sending configuration information to the terminal;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

As shown in fig. 7, the embodiment of the present application further provides a network device, which includes a processor 700, a transceiver 710, a memory 720, and a program stored in the memory 720 and capable of running on the processor 700, wherein the transceiver 710 is connected to the processor 700 and the memory 720 through a bus interface, and the processor 700 is configured to read the program in the memory, and perform the following procedures, wherein the processor is configured to read the computer program in the memory to perform the following operations:

Receiving first information sent by a terminal through a transceiver;

A transceiver 710 for receiving and transmitting data under the control of the processor 700.

Wherein in fig. 7, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 700 and various circuits of memory represented by memory 720, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, etc. The user interface 730 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

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

Alternatively, the processor 700 may 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 may also employ a multi-core architecture.

the position information of the terminal when RLF occurs;

first measurement result information corresponding to RLF;

wherein the first condition includes at least one of:

Before satellite transformation is triggered;

Satellite transformation;

After RLF occurs;

after RLF occurs and after triggering RRC connection re-establishment failure.

Optionally, the first measurement result information includes at least one of:

Measuring results of a target object accessed by the terminal when RLF occurs;

Neighbor cell information list.

The cause of potential problems in successful satellite conversion processes;

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

Wherein the target object comprises at least one of a satellite and a cell.

Sending configuration information to a terminal;

Wherein the configuration information includes at least one of:

a proportional threshold of the target timer;

a difference threshold for the target timer;

Critical off-service time length;

Critical access time length.

It should be noted that, the network device provided in the embodiment of the present application can implement all the method steps implemented in the embodiment of the method and achieve the same technical effects, and the same parts and beneficial effects as those of the embodiment of the method in the embodiment are not described in detail herein.

The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the information transmission method applied to a network device. The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile storage (NAND FLASH), solid State Disk (SSD)), etc.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may 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 instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational 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 flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. An information transmission method, characterized by being executed by a terminal, comprising:

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;

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

2. The method according to claim 1, wherein the information related to the RLF of the satellite transformation includes at least one of the following:

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;

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;

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

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

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;

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

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

The location information of the terminal when RLF occurs;

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

First measurement result information corresponding to the RLF;

The first condition includes at least one of the following:

Before satellite change trigger;

When the satellite changes;

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

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

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

After RLF occurs;

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

3. The method according to claim 2, wherein the first measurement result information includes at least one of the following:

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

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

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

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

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

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

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;

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;

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;

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

4. The method according to claim 2, wherein the information related to the RLF of the satellite transformation further comprises:

The length of time that the source and target satellites accessed by the terminal are jointly covered during the satellite change process.

5. The method according to any one of claims 1 to 4, characterized in that, when the first information includes information related to the RLF of the satellite transformation, the first information further includes at least one of the following:

The network-configured service cell and neighboring cell service link propagation delay difference configuration information;

The service link propagation delay difference between the serving cell and the neighboring cell in the terminal auxiliary information;

The time offset between the uplink synchronization signal blocks (SSBs) of the source and target satellites.

6. The method according to claim 5, wherein the configuration information of the propagation delay difference between the serving cell and the neighboring cell service link includes at least one of the following:

The propagation delay difference threshold between the serving cell and the neighboring cell service link;

Neighboring cell information list.

7. The method of claim 1 , wherein the information related to potential problems in a successful satellite change process comprises at least one of the following:

a transformation type corresponding to a successful satellite transformation, the transformation type including at least one of the following: satellite transformation, service link transformation, feeder link transformation, and inter-cell handover;

Information about a target object accessed by the terminal before a successful satellite change, the target object including a satellite and/or a cell;

Information about the target object that the terminal accesses after a successful satellite change;

User identification information corresponding to the cell accessed by the terminal before the successful satellite change;

User identification information corresponding to the cell accessed by the terminal after a successful satellite change;

The terminal's location information at the time of successful satellite change;

Information about the length of time from when a successful satellite change occurs to when the network device obtains the first information;

Causes of potential problems during successful satellite conversions;

The second measurement result information corresponding to the successful satellite transformation.

8. The method according to claim 7, wherein the second measurement result information includes at least one of the following:

The measurement results of the target object accessed by the terminal before the successful satellite change;

The measurement results of the neighboring cells of the target object accessed by the terminal before the successful satellite change;

The measurement results of the target object accessed by the terminal after a successful satellite transformation;

The measurement results of the neighboring cells of the target object accessed by the terminal after successful satellite change;

The target object includes at least one of the following: a satellite and a cell.

9. The method of claim 1, 7 or 8, wherein recording information related to potential problems during a successful satellite change process comprises:

If the second condition is met, recording of information related to potential problems during successful satellite change;

The second condition includes at least one of the following:

When acquiring synchronization with a target satellite or a target cell, 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 acquiring synchronization with a target satellite or 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 the difference threshold of the target timer;

The difference between the out-of-service time point of the source satellite or source cell and the time point of successful access by the terminal is less than or equal to the critical out-of-service time length;

The time length from satellite change triggering to the terminal successfully acquiring synchronization with the target satellite or target cell is greater than or equal to the critical access time length.

10. The method according to claim 9, further comprising:

Receive configuration information sent by network devices;

The configuration information includes at least one of the following:

The proportional threshold of the target timer;

The difference threshold of the target timer;

Length of critical outage time;

Critical access time length.

11. An information transmission method, characterized by being executed by a network device, comprising:

receiving first information sent by a terminal;

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.

12. The method according to claim 11, wherein the information related to the RLF of the satellite transformation includes at least one of the following:

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

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

The location information of the terminal when RLF occurs;

First measurement result information corresponding to the RLF;

The first condition includes at least one of the following:

Before satellite change trigger;

When the satellite changes;

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

After RLF occurs;

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

13. The method according to claim 12, wherein the first measurement result information includes at least one of the following:

The measurement results of the target object accessed by the terminal before triggering the satellite change;

14. The method according to claim 12, wherein the information related to the RLF of the satellite transformation further comprises:

15. The method according to any one of claims 11 to 14, wherein, when the first information includes information related to RLF of satellite transformation, the first information further includes at least one of the following:

16. The method according to claim 15, wherein the configuration information of the propagation delay difference between the serving cell and the neighboring cell service link includes at least one of the following:

Neighboring cell information list.

17. The method of claim 11, wherein the information related to potential problems in a successful satellite change process comprises at least one of the following:

The terminal's location information at the time of successful satellite change;

Causes of potential problems during successful satellite conversions;

18. The method according to claim 17, wherein the second measurement result information includes at least one of the following:

The measurement results of the target object accessed by the terminal after a successful satellite change;

19. The method according to claim 11, 17 or 18, further comprising:

Send configuration information to the terminal;

The configuration information includes at least one of the following:

The proportional threshold of the target timer;

The difference threshold of the target timer;

Length of critical outage time;

Critical access time length.

20. A terminal, comprising a memory, a transceiver, and a processor:

A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

21. The terminal according to claim 20, wherein the information related to the RLF of the satellite transformation includes at least one of the following:

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

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

The location information of the terminal when RLF occurs;

First measurement result information corresponding to the RLF;

The first condition includes at least one of the following:

Before satellite change trigger;

When the satellite changes;

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

After RLF occurs;

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

22. The terminal according to claim 21, wherein the first measurement result information includes at least one of the following:

23. The terminal according to claim 21, wherein the information related to the RLF of the satellite transformation further includes:

24. The terminal according to any one of claims 20 to 23, wherein, when the first information includes information related to RLF of satellite transformation, the first information further includes at least one of the following:

25. The terminal according to claim 24, wherein the configuration information of the propagation delay difference between the serving cell and the neighboring cell service link includes at least one of the following:

Neighboring cell information list.

26. The terminal according to claim 20, wherein the information related to potential problems in a successful satellite change process comprises at least one of the following:

The terminal's location information at the time of successful satellite change;

Causes of potential problems during successful satellite conversions;

27. The terminal according to claim 26, wherein the second measurement result information includes at least one of the following:

28. The terminal according to claim 20, 26 or 27, wherein the processor is configured to read the computer program in the memory and perform the following operations:

The second condition includes at least one of the following:

29. The terminal according to claim 28, wherein the processor is configured to read the computer program in the memory and further perform the following operations:

Receive configuration information sent by network devices;

The configuration information includes at least one of the following:

The proportional threshold of the target timer;

The difference threshold of the target timer;

Length of critical outage time;

Critical access time length.

30. A network device, comprising a memory, a transceiver, and a processor:

receiving, through a transceiver, first information sent by a terminal;

31. The network device according to claim 30, wherein the information related to the RLF of the satellite transformation includes at least one of the following:

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

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

The location information of the terminal when RLF occurs;

First measurement result information corresponding to the RLF;

The first condition includes at least one of the following:

Before satellite change trigger;

When the satellite changes;

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

After RLF occurs;

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

32. The network device according to claim 31, wherein the first measurement result information includes at least one of the following:

33. The network device according to claim 31, wherein the information related to the RLF of the satellite transformation further includes:

34. The network device according to any one of claims 30 to 33, wherein, when the first information includes information related to RLF of satellite transformation, the first information further includes at least one of the following:

35. The network device according to claim 34, wherein the configuration information of the propagation delay difference between the serving cell and the neighboring cell service link includes at least one of the following:

Neighboring cell information list.

36. The network device of claim 30, wherein the information related to potential problems in a successful satellite change process comprises at least one of the following:

The terminal's location information at the time of successful satellite change;

Causes of potential problems during successful satellite conversions;

37. The network device according to claim 36, wherein the second measurement result information includes at least one of the following:

38. The network device according to claim 30, 36 or 37, wherein the processor is configured to read the computer program in the memory and further perform the following operations:

Send configuration information to the terminal;

The configuration information includes at least one of the following:

The proportional threshold of the target timer;

The difference threshold of the target timer;

Length of critical outage time;

Critical access time length.

39. An information transmission device, applied to a terminal, comprising:

a recording unit, configured to record 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;

The first sending unit is configured to send the first information to a network device, where the first information is used to assist in satellite-related mobility robustness optimization.

40. An information transmission device, applied to a network device, comprising:

A first receiving unit, configured to receive first information sent by a terminal;

41. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to any one of claims 1 to 19.

42. A computer program product, comprising computer instructions, which, when executed by a processor, implement the steps of the method according to any one of claims 1 to 19.