Processing method, communication device and computer-readable storage medium

Abstract

In the technical solution of the present application, a processing method for satellite handover resynchronization is determined on the basis of first information; thus, on the basis of the first information, a terminal device can clearly obtain the processing method for satellite handover resynchronization in a regenerative mode.

Description

Processing method, communication device and computer-readable storage medium Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a processing method, a communication device, and a computer-readable storage medium. Background Art

[0002] In existing protocols, the processing method for satellite switching resynchronization is only applicable to the scenario where the satellite is in transparent mode.

[0003] During the process of conceiving and implementing this application, the inventors discovered that there are at least the following problems: for the scenario where the satellite is in regenerative mode, if satellite switching and resynchronization are performed using the same processing method as the transparent transmission mode, the terminal device cannot identify and / or determine the mode to which the satellite belongs, and thus cannot perform corresponding processing, such as: data recovery and / or key derivation, which will result in discontinuous communication services and / or service interruption.

[0004] In summary, in the regeneration mode, how to clarify the processing method of satellite switching and resynchronization has become a technical problem that needs to be solved urgently.

[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Technical Solutions

[0006] The main purpose of this application is to provide a processing method, a communication device and a computer-readable storage medium, aiming to clarify the processing method of satellite switching resynchronization in regeneration mode.

[0007] This application provides a processing method that can be applied to a terminal device (such as a mobile phone), comprising the following steps:

[0008] S2: Determine a processing method for satellite switching resynchronization based on the first information.

[0009] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0010] Optionally, the method further comprises at least one of the following:

[0011] Satellite handover resynchronization configuration information is carried in the system message;

[0012] The satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0013] The timing advance information comes from the serving cell and / or neighboring cells;

[0014] The time advance information includes general time advance information and / or scheduling offset time advance information.

[0015] Optionally, step S2 includes at least one of the following:

[0016] performing packet data convergence protocol data recovery based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0017] performing key derivation based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0018] performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information;

[0019] Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

[0020] Optionally, performing key derivation based on the key update indication includes at least one of the following:

[0021] When the key update indication is a first value, performing horizontal key derivation;

[0022] When the key update indication is the second value, vertical key derivation is performed.

[0023] Optionally, the method further comprises at least one of the following:

[0024] System messages are used to broadcast regenerative mode satellite configuration;

[0025] The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area;

[0026] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the serving satellite is a regenerative mode satellite;

[0027] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the target satellite is a regeneration mode satellite;

[0028] The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regenerative mode satellite;

[0029] The universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite;

[0030] The processing method is used for regeneration mode satellite switching resynchronization.

[0031] The present application also provides a processing method that can be applied to network equipment (such as satellites), comprising the steps of:

[0032] S1: Sending first information so that the terminal device determines a processing method for satellite switching resynchronization based on the first information.

[0033] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0034] Optionally, the method further comprises at least one of the following:

[0035] Satellite handover resynchronization configuration information is carried in the system message;

[0036] The satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0037] The timing advance information comes from the serving cell and / or neighboring cells;

[0038] The time advance information includes general time advance information and / or scheduling offset time advance information.

[0039] Optionally, the terminal device determines, based on the first information, a processing method for satellite switching resynchronization, including at least one of the following:

[0040] performing packet data convergence protocol data recovery based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0041] performing key derivation based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0042] performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information;

[0043] Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

[0044] Optionally, the terminal device performs key derivation based on the key update indication, including at least one of the following:

[0045] When the key update indication is the first value, the terminal device performs horizontal key derivation;

[0046] When the key update indication is the second value, the terminal device performs vertical key derivation.

[0047] Optionally, the method further comprises at least one of the following:

[0048] System messages are used to broadcast regenerative mode satellite configuration;

[0049] The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area;

[0050] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the serving satellite is a regenerative mode satellite;

[0051] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the target satellite is a regeneration mode satellite;

[0052] The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regenerative mode satellite;

[0053] The universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite;

[0054] The processing method is used for regeneration mode satellite switching resynchronization.

[0055] The present application also provides a communication device, comprising: a memory, a processor, and a processing program stored in the memory and executable on the processor, wherein the processing program implements the steps of any of the above-described processing methods when executed by the processor.

[0056] The communication equipment in this application can be a terminal device (such as a mobile phone) or a network device (such as a satellite). The specific reference needs to be clarified based on the context.

[0057] The present application also provides a computer-readable storage medium, on which a processing program is stored. When the processing program is executed by a processor, the steps of any of the processing methods described above are implemented.

[0058] The technical solution of the present application determines a processing method for satellite switching resynchronization based on the first information, so that the terminal device can clearly determine the processing method for satellite switching resynchronization in the regeneration mode according to the first information. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0060] FIG1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0061] FIG2 is a diagram of a communication network system architecture provided by an embodiment of the present application;

[0062] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application;

[0063] FIG4 is a schematic diagram of the hardware structure of a network node 150 provided in this application;

[0064] FIG5 is a schematic flow chart of a processing method according to the first embodiment;

[0065] FIG6 is a schematic flow chart of a processing method according to a second embodiment;

[0066] FIG7 is a schematic flow chart of a processing method according to a third embodiment;

[0067] FIG8 is a schematic diagram of an interaction sequence according to a fourth embodiment;

[0068] FIG9 is a schematic flow chart of a processing method according to an eighth embodiment;

[0069] FIG10 is a first structural diagram of a processing device provided in an embodiment of the present application;

[0070] FIG11 is a second structural diagram of a processing device provided in an embodiment of the present application;

[0071] FIG12 is a schematic diagram of the structure of the communication device provided in an embodiment of the present application.

[0072] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments.

[0073] Implementation Methods of the Application

[0074] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0075] It should be noted that, in this document, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element, and / or, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0076] It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the recited features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0077] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0078] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0079] It should be noted that in this article, step codes such as S1 and S2 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial restriction on the order. When implementing the step, those skilled in the art may execute S2 first and then S1, etc., but these should all be within the scope of protection of this application.

[0080] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0081] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0082] The communication equipment in this application can be a terminal device (such as a mobile phone) or a network device (such as a satellite). The specific reference needs to be clarified based on the context.

[0083] The terminal device may be implemented in various forms. For example, the terminal device described in this application may include intelligent terminal devices such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, and other fixed terminal devices such as digital TVs and desktop computers.

[0084] The subsequent description will be made using a mobile terminal as an example. Those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminal devices.

[0085] Please refer to Figure 1, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application. The mobile terminal 100 may include components such as an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will understand that the mobile terminal structure shown in Figure 1 does not limit the mobile terminal. The mobile terminal may include more or fewer components than shown, or may combine certain components, or arrange the components differently.

[0086] The following is a detailed introduction to the various components of the mobile terminal in conjunction with Figure 1:

[0087] The RF unit 101 can be used to send and receive information or receive signals during calls. Specifically, it receives downlink information from the base station and transmits it to the processor 110 for processing. It also transmits uplink data to the base station. Typically, the RF unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and / or other components. Furthermore, the RF unit 101 can communicate with the network and other devices via wireless communication. The above-mentioned wireless communications can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), 5G and 6G, etc.

[0088] WiFi is a short-range wireless transmission technology. A mobile terminal, through WiFi module 102, enables users to send and receive emails, browse web pages, and access streaming media, providing wireless broadband Internet access. Although FIG1 illustrates WiFi module 102, it is understood that it is not a required component of the mobile terminal and can be omitted as needed without altering the essence of the invention.

[0089] The audio output unit 103 can convert audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, or the like.

[0090] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos captured by an image capture device (e.g., a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the GPU 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the RF unit 101 or the WiFi module 102. The microphone 1042 may receive sound (audio data) in operating modes such as a phone call mode, a recording mode, and a voice recognition mode, and may process such sound into audio data. In the phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 101. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0091] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described here.

[0092] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0093] The user input unit 107 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 1071) and drive corresponding connected devices according to a pre-set program. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch direction and detects the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 110. It can also receive and execute commands sent by the processor 110. And / or, the touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc., and the specifics are not limited here.

[0094] Optionally, the touch panel 1071 may overlay the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. The processor 110 then provides a corresponding visual output on the display panel 1061 based on the type of touch event. Although in FIG1 , the touch panel 1071 and the display panel 1061 are shown as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited to this specific embodiment.

[0095] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0096] Memory 109 can be used to store software programs and various data. Memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, / or, memory 109 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0097] Processor 110 is the control center of the mobile terminal, connecting all components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 109 and accessing data stored in memory 109, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, processor 110 may integrate an application processor and a modem processor. Optionally, the application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 110.

[0098] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0099] Although not shown in FIG. 1 , the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0100] To facilitate understanding of the embodiments of the present application, the communication network system on which the mobile terminal of the present application is based is described below.

[0101] Please refer to Figure 2, which is a communication network system architecture diagram provided in an embodiment of the present application. The communication network system is an NR (New Radio) system of universal mobile communication technology. The NR system includes UE (User Equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, EPC (Evolved Packet Core) 203 and the operator's IP service 204, which are connected in sequence.

[0102] Optionally, UE201 may be the above-mentioned terminal device 100, which will not be described in detail here.

[0103] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 . Optionally, eNodeB 2021 may be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface). eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 may provide access from UE 201 to EPC 203 .

[0104] EPC 203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, PGW (PDN Gate Way) 2035, and PCRF (Policy and Charging Rules Function) 2036. MME 2031 is the control node that processes signaling between UE 201 and EPC 203, providing bearer and connection management. HSS 2032 provides registers for managing functions such as the Home Location Register (not shown) and stores user-specific information such as service features and data rates. All user data can be sent through SGW2034, PGW2035 can provide IP address allocation and other functions for UE 201, PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources, and it selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0105] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services.

[0106] Although the above introduction takes the LTE system as an example, those skilled in the art should know that this application is not only applicable to the LTE system, but can also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., which are not limited here.

[0107] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application. The controller 140 includes a memory 1401 and a processor 1402. The memory 1401 is used to store program instructions, and the processor 1402 is used to call the program instructions in the memory 1401 to execute the steps performed by the controller in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0108] Optionally, the controller further includes a communication interface 1403, which can be connected to the processor 1402 via a bus 1404. The processor 1402 can control the communication interface 1403 to implement the receiving and sending functions of the controller 140.

[0109] Figure 4 is a schematic diagram of the hardware structure of a network node 150 provided in this application. Network node 150 includes: a memory 1501 and a processor 1502. Memory 1501 is used to store program instructions, and processor 1502 is used to call the program instructions in memory 1501 to execute the steps performed by the first node in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0110] Optionally, the controller further includes a communication interface 1503, which can be connected to the processor 1502 via a bus 1504. The processor 1502 can control the communication interface 1503 to implement the receiving and sending functions of the network node 150.

[0111] The integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The software function modules stored in a storage medium include a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute some of the steps of the methods of various embodiments of the present application.

[0112] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive solid state disk, SSD), etc.

[0113] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0114] First embodiment

[0115] 5 , which is a flow chart of a processing method according to a first embodiment, the processing method of the embodiment of the present application can be applied to a terminal device (such as a mobile phone), including the following steps:

[0116] S2: Determine a processing method for satellite switching resynchronization based on the first information.

[0117] Optionally, the processing method in the embodiment of the present application is used in a scenario where a satellite in regenerative mode performs switching and resynchronization.

[0118] Optionally, the regenerative mode satellite is a satellite having all or part of the functionality of a conventional ground base station.

[0119] Alternatively, the regenerative mode satellite may also be referred to as a regenerative NTN payload.

[0120] Alternatively, the transparent mode satellite may also be referred to as a transparent non-terrestrial payload (transparent NTN payload).

[0121] Optionally, the terminal device performs Packet Data Convergence Protocol (PDCP) data recovery based on the first information.

[0122] Optionally, the terminal device performs key derivation based on the first information.

[0123] Optionally, the terminal device performs key derivation including performing vertical key derivation and / or horizontal key derivation.

[0124] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0125] Optionally, the satellite handover resynchronization configuration information is carried in a system message.

[0126] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0127] Optionally, the timing advance information comes from a serving cell and / or a neighboring cell.

[0128] Optionally, the time advance information includes universal time advance information and / or scheduling offset time advance information.

[0129] Optionally, system messages are used to broadcast regenerative mode satellite configurations.

[0130] Optionally, the system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area.

[0131] Optionally, at least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the service satellite is a regeneration mode satellite.

[0132] Optionally, at least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the target satellite is a regeneration mode satellite.

[0133] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the serving cell is a regeneration mode satellite.

[0134] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite.

[0135] Through the technical solution of this embodiment, the processing method of satellite switching resynchronization is determined based on the first information, so that the terminal device can clearly understand the processing method of satellite switching resynchronization in the regeneration mode according to the first information.

[0136] Second embodiment

[0137] 6 , which is a flow chart of a processing method according to a second embodiment, based on the first embodiment of the present application, this embodiment further discloses step S2, which includes step S21 and / or step S22:

[0138] S21: performing packet data convergence protocol data recovery based on at least one of the satellite mode indication, the key update indication, and the data recovery indication;

[0139] S22: Perform packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information.

[0140] The base stations connected by satellites in traditional transparent transmission mode can be the same base station, while satellites in regeneration mode are actually different base stations. Therefore, for data sent by the sender on the source base station but not confirmed by the underlying layer, if it cannot be resent on the base station after satellite switching and resynchronization, it will take more time to resend through the upper layer mechanism, resulting in service discontinuity and / or service interruption.

[0141] In the embodiment of the present application, the terminal device performs packet data convergence protocol data recovery based on the first information, which can reduce or avoid service discontinuity and / or service interruption.

[0142] Optionally, the first information includes satellite handover resynchronization configuration information and / or timing advance information (TA, Timing Advance).

[0143] Optionally, in an embodiment of the present application, satellite switching resynchronization configuration information is carried via a system message.

[0144] Optionally, the system message may be a system message 19 (SIB19) and / or a newly introduced system message.

[0145] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0146] Optionally, the terminal device performs packet data convergence protocol data recovery according to the satellite mode indication.

[0147] Optionally, the terminal device performs packet data convergence protocol data recovery according to the key update indication.

[0148] Optionally, the terminal device performs packet data convergence protocol data recovery according to the data recovery indication.

[0149] Optionally, the time advance information includes common time advance (ta-Common) information and / or scheduling offset time advance (kmac) information.

[0150] Optionally, common time advance (ta-Common) information and / or scheduling offset time advance (kmac) information, for details, refer to protocol TS 38.331v18.0.0.

[0151] Optionally, when the universal time advance value is 0 and / or the scheduling offset time advance value is 0, it indicates that the current satellite mode is the regenerative satellite mode.

[0152] Optionally, the terminal device performs packet data convergence protocol data recovery according to the universal time advance information.

[0153] Optionally, the terminal device performs packet data convergence protocol data recovery according to the scheduling offset time advance information.

[0154] Optionally, when the universal time advance value is 0 and / or the scheduling offset time advance value is 0, packet data convergence protocol data recovery (PDCP data recovery) is performed.

[0155] Through the technical solution of this embodiment, packet data convergence protocol data recovery is performed based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; and / or, packet data convergence protocol data recovery is performed based on the universal time advance information and / or the scheduling offset time advance information, thereby clarifying the processing method for satellite switching resynchronization in the regeneration mode; and / or ensuring that the terminal device in the regeneration mode performs packet data convergence protocol data recovery, which can reduce service discontinuity delay and / or service interruption duration.

[0156] Third embodiment

[0157] 7 , which is a flow chart of a processing method according to a third embodiment, based on any of the aforementioned embodiments of the present application, this embodiment further discloses step S2, which includes step S23 and / or step S24:

[0158] S23: performing key derivation based on at least one of the satellite mode indication, the key update indication, and the data recovery indication;

[0159] S24: Perform key derivation based on the universal time advance information and / or the scheduling offset time advance information.

[0160] Currently, handovers between intra-gNBs and / or inter-gNBs all perform secure key updates, such as horizontal key derivation and / or vertical key derivation. The base station carries a Next Hop Chaining Counter (NCC) and / or a key set change indicator (KeySetChangeIndicator) to instruct the terminal device to perform the corresponding key update. Because the NCC value and / or the key set change indicator are carried via Radio Resource Control (RRC) signaling, which is integrity protected and / or encrypted, unsecured information exchange between the terminal device and the base station can be avoided. Furthermore, the RRC signaling is UE-specific, allowing the network equipment to instruct individual terminal devices to perform the corresponding key update. Current satellite switching resynchronization instructs terminal devices to perform satellite switching via broadcast information. However, since the broadcast information is not integrity protected and / or encrypted, carrying the NCC value will cause insecure information interaction, and / or the broadcast information cannot perform the instruction function for individual terminal devices, thereby limiting the processing methods of network devices and / or terminal devices, and / or continuing to use the traditional key update method will cause signaling overhead.

[0161] In an embodiment of the present application, the terminal device performs key derivation based on the first information, which can improve the security of information interaction in the regeneration mode, and / or realize the indication function for a specific terminal device, and / or reduce the signaling overhead caused by satellite switching.

[0162] Optionally, the key derivation or key update in the embodiment of the present application refers to the horizontal key derivation and / or vertical key derivation performed by the terminal device when performing switching. For details, please refer to the protocol TS 33.501v17.9.0.

[0163] Optionally, the first information includes satellite handover resynchronization configuration information and / or timing advance information (TA, Timing Advance).

[0164] Optionally, in an embodiment of the present application, satellite switching resynchronization configuration information is carried via a system message.

[0165] Optionally, the system message may be a system message 19 (SIB19) and / or a newly introduced system message.

[0166] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0167] Optionally, the terminal device performs key derivation according to the satellite mode indication.

[0168] Optionally, the terminal device performs key derivation according to the key update indication.

[0169] Optionally, the terminal device performs key derivation according to the data recovery indication.

[0170] Optionally, the time advance information includes common time advance (ta-Common) information and / or scheduling offset time advance (kmac) information.

[0171] Optionally, common time advance (ta-Common) information and / or scheduling offset time advance (kmac) information, for details, refer to protocol TS 38.331v18.0.0.

[0172] Optionally, when the universal time advance value is 0 and / or the scheduling offset time advance value is 0, it indicates that the current satellite mode is the regenerative satellite mode.

[0173] Optionally, the terminal device performs key derivation based on the universal time advance information.

[0174] Optionally, the terminal device performs key derivation based on the scheduling offset time advance information.

[0175] Optionally, when the universal time advance value is 0 and / or the scheduling offset time advance value is 0, key derivation is performed.

[0176] Optionally, the terminal device determines whether to perform horizontal key derivation or vertical key derivation according to the value of the key update indication.

[0177] Optionally, when the key update indication is a first value (eg, 0), the terminal device performs horizontal key derivation.

[0178] Optionally, when the key update indication is a second value (eg, 1), the terminal device performs vertical key derivation.

[0179] Optionally, the terminal device determines whether to perform horizontal key derivation or vertical key derivation according to whether there is a satellite mode indication, for example: if there is a satellite mode indication, horizontal key derivation is performed or if there is a satellite mode indication, vertical key derivation is performed.

[0180] Optionally, the terminal device determines whether to perform horizontal key derivation or vertical key derivation based on whether there is a data recovery indication, for example: if there is a data recovery indication, perform horizontal key derivation or if there is a data recovery indication, perform vertical key derivation.

[0181] Through the technical solution of this embodiment, key derivation is performed based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; and / or, key derivation is performed based on the universal time advance information and / or the scheduling offset time advance information, thereby clarifying the processing method for satellite switching resynchronization in the regeneration mode; and / or, providing multiple methods for instructing terminal devices to perform key derivation, which can improve the security of information interaction in the regeneration mode, and / or realize the indication function for specific terminal devices, and / or reduce the signaling overhead caused by satellite switching.

[0182] Fourth embodiment

[0183] 8 , which is a schematic diagram of an interaction sequence according to a fourth embodiment, based on any of the foregoing embodiments of the present application, this embodiment further discloses a method for performing satellite switching resynchronization in a regeneration mode.

[0184] Optionally, the network device in this embodiment includes a source base station and a target base station.

[0185] Optionally, the source base station is a regenerative mode satellite and / or a regenerative payload satellite.

[0186] Alternatively, the regenerative mode satellite may also be referred to as a regenerative NTN payload.

[0187] Optionally, the source base station is a quasi-Earth-fixed satellite and / or an Earth-moving satellite.

[0188] Optionally, the source base station decides whether to perform a switch (Switch) based on the time information of the current coverage area that will be stopped serving, for example, t-Service.

[0189] Optionally, the switching is inter-satellite and / or inter-regeneration mode base station switching.

[0190] Optionally, the source base station sends a request signaling to the target base station.

[0191] Optionally, the target base station is a regenerative mode satellite and / or a regenerative payload satellite.

[0192] Optionally, the target base station is a quasi-Earth-fixed satellite or an Earth-moving satellite.

[0193] Optionally, the request signaling sent by the source base station may be any signaling of the Xn interface, for example, HANDOVER REQUEST. For details, please refer to protocol TS 38.401.

[0194] Optionally, the target base station sends a confirmation signaling to the source base station.

[0195] Optionally, the confirmation signaling may be any signaling of the Xn interface, for example, HANDOVER REQUEST ACKNOWLEDGE.

[0196] Optionally, the confirmation signaling carries time information when the target satellite will serve the coverage area of ​​the current serving satellite, for example, t-ServiceStart.

[0197] Optionally, the source base station sends a system message.

[0198] Optionally, the terminal device receives a system message sent by the source base station.

[0199] Optionally, the system message carries satellite handover resynchronization configuration information and / or time advance information.

[0200] Optionally, the terminal device determines a processing method for satellite handover resynchronization based on the satellite handover resynchronization configuration information and / or time advance information carried in the system message.

[0201] Optionally, the target base station sends synchronization information to the terminal device.

[0202] Optionally, the synchronization information is a synchronization information block (SSB, SS / PBCH block).

[0203] Optionally, the target base station sends a synchronization information block according to the time information (t-ServiceStart) of the target base station entering the coverage area of ​​the current serving satellite. For example, the synchronization information is sent when the target base station enters the coverage area of ​​the current serving satellite.

[0204] Optionally, the terminal device performs downlink synchronization based on the synchronization information sent by the target base station.

[0205] Optionally, the terminal device performs downlink synchronization according to the time information (t-ServiceStart) when the target satellite will serve the coverage area of ​​the current serving satellite. For example, the terminal device performs downlink synchronization within the time interval of t-ServiceStart and t-Service.

[0206] Optionally, the terminal device performs uplink synchronization of the target base station.

[0207] Optionally, the terminal device performs uplink synchronization based on the time information (t-Service) at which the serving base station is about to stop serving the current coverage area, for example: the terminal device performs uplink synchronization in t-Service.

[0208] Optionally, uplink synchronization is performed through a random access (RA) or a random access-free (RACH-Less) manner.

[0209] Optionally, the uplink synchronization is re-synchronization. For details, refer to protocol TS 38.300v18.1.0, 16.14.3.2.3.

[0210] Through the technical solution of this embodiment, the source base station sends a system message, and the terminal device determines the processing method for satellite switching resynchronization based on the system message, which clarifies the processing method for the terminal device to determine satellite switching resynchronization in the regeneration mode.

[0211] Fifth embodiment

[0212] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a specific solution for a terminal device to determine a processing method for satellite switching resynchronization based on a system message.

[0213] Optionally, the system message is system information block 19 (SIB19).

[0214] Optionally, the system message carries satellite handover resynchronization configuration information.

[0215] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0216] Optionally, the satellite mode indication is used to determine whether the serving satellite and / or the target satellite is a regenerative mode satellite. For example, when the satellite mode indication exists, it indicates that the target satellite is a regenerative mode satellite.

[0217] It should be noted that the satellite mode indication may also be named as a regenerative satellite indication, etc., and the embodiments of the present application do not constitute a specific limitation on the name.

[0218] Optionally, the Packet Data Convergence Protocol (PDCP) data recovery indication is used to determine whether to perform Packet Data Convergence Protocol data recovery (PDCP data recovery) during satellite handover.

[0219] Optionally, the key update indication is used to indicate the execution of horizontal key derivation and / or vertical key derivation, for example: when the key update indication is 0, it indicates horizontal key derivation, and / or, when the key update indication is 1, it indicates vertical key derivation; or, when the key update indication is 1, it indicates horizontal key derivation, and / or, when the key update indication is 0, it indicates vertical key derivation.

[0220] Optionally, the satellite mode indication may also be used to determine whether to perform key update and / or key derivation, for example, performing horizontal key derivation when there is a satellite mode indication, or performing vertical key derivation when there is a regeneration satellite signal indication.

[0221] Optionally, the satellite mode indication may also be used to determine whether to perform packet data convergence protocol data recovery, for example, when there is a satellite mode indication, packet data convergence protocol data recovery is performed.

[0222] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite based on the satellite mode indication.

[0223] Optionally, the terminal device can assist in determining the current satellite type through the satellite mode indication, and further confirm the processing method for satellite switching and resynchronization.

[0224] Optionally, the terminal device performs packet data convergence protocol data recovery according to the packet data convergence protocol data recovery indication, for example, retransmits the data of the acknowledged mode (AM) data radio bearer (DRB) after completing uplink synchronization with the target base station. Optionally, the data is a data packet (PDU, Protocol Data Unit) that was previously delivered but did not receive underlying feedback confirmation, such as: PDCP Data PDU.

[0225] Optionally, the terminal device performs horizontal key derivation and / or vertical key derivation based on the key update indication, for example: when the key update indication is 0, it indicates horizontal key derivation, and / or, when the key update indication is 1, it indicates vertical key derivation; or, when the key update indication is 1, it indicates horizontal key derivation, and / or, when the key update indication is 0, it indicates vertical key derivation.

[0226] Optionally, the terminal device determines whether to perform key update and / or derivation based on the satellite mode indication, for example, performing horizontal key derivation when there is a regeneration satellite signal indication, or performing vertical key derivation when there is a regeneration satellite signal indication.

[0227] Optionally, the terminal device determines whether to perform packet data convergence protocol data recovery based on the satellite mode indication, for example: when there is a regeneration satellite signal indication, packet data convergence protocol data recovery is performed, for example: after completing uplink synchronization with the target base station, the data of the confirmation mode data wireless bearer is retransmitted, optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation.

[0228] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to the key update indication.

[0229] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to a packet data convergence protocol data recovery indication.

[0230] Optionally, the terminal device further performs packet data convergence protocol data recovery by determining that the target satellite is a regeneration mode satellite to reduce data transmission delay and / or reduce service interruption time; and / or the network device determines the key update method through the key update indication and / or the packet data convergence protocol data recovery indication to reduce the signaling overhead caused by satellite switching.

[0231] Optionally, the system message also carries the serving cell configuration (NTN-Config), the neighboring cell configuration (NTN-NeighCellConfig), the time information when the serving cell stops serving the current coverage area (t-Service), and the time information when the neighboring cell starts serving the current coverage area (t-ServiceStart). For details, please refer to the protocol TS 38.331v18.1.0.

[0232] Through the technical solution of this embodiment, the terminal device determines the processing method for satellite switching resynchronization based on at least one of the satellite mode indication, key update indication and data recovery indication in the system message, and clarifies the processing method for satellite switching resynchronization in the regeneration mode; and / or, provides multiple methods for indicating satellite type, indicating data recovery and key derivation, so that the terminal device can determine the processing method for satellite switching resynchronization based on the system message, improves the mechanism for the terminal device to determine the processing method for satellite switching resynchronization in the regeneration mode, reduces subsequent data transmission delay and / or service interruption time, and / or reduces signaling overhead.

[0233] Sixth embodiment

[0234] On the basis of any of the foregoing embodiments of the present application, this embodiment further discloses a specific solution for a terminal device to determine a processing method for satellite switching resynchronization based on a newly introduced system message.

[0235] Optionally, a newly introduced system message is used to broadcast the regeneration mode satellite configuration for terminal devices to identify the satellite type.

[0236] Optionally, the terminal device determines that the service cell and / or the neighboring cell is a regeneration mode satellite based on the newly introduced system message received. For example, if the newly introduced system message carries the service cell satellite switching resynchronization configuration, the service cell is regarded as a regeneration mode satellite, and / or if the newly introduced system message carries the neighboring cell satellite switching resynchronization configuration, the neighboring cell is regarded as a regeneration mode satellite.

[0237] Optionally, the terminal device performs packet data convergence protocol data recovery and / or key derivation based on the newly introduced system message received, for example: retransmitting the data of the confirmation mode data wireless bearer after completing uplink synchronization with the target base station, optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation, and / or, performing horizontal key derivation and / or vertical key derivation.

[0238] Optionally, the newly introduced system message carries satellite handover resynchronization configuration information.

[0239] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0240] Optionally, the satellite mode indication is used to determine whether the serving satellite and / or the target satellite is a regenerative mode satellite. For example, when the satellite mode indication exists, it indicates that the target satellite is a regenerative mode satellite.

[0241] Optionally, the packet data convergence protocol data recovery indication is used to determine whether to perform packet data convergence protocol data recovery during satellite handover.

[0242] Optionally, the key update indication is used to indicate the execution of horizontal key derivation and / or vertical key derivation, for example: when the key update indication is 0, it indicates horizontal key derivation, and / or, when the key update indication is 1, it indicates vertical key derivation; or, when the key update indication is 1, it indicates horizontal key derivation, and / or, when the key update indication is 0, it indicates vertical key derivation.

[0243] Optionally, the satellite mode indication may also be used to determine whether to perform key update and / or derivation, for example, performing horizontal key derivation when there is a satellite mode indication, or performing vertical key derivation when there is a regeneration satellite signal indication.

[0244] Optionally, the satellite mode indication may also be used to determine whether to perform packet data convergence protocol data recovery, for example, when there is a satellite mode indication, packet data convergence protocol data recovery is performed.

[0245] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite based on the satellite mode indication.

[0246] Optionally, the terminal device can assist in determining the current satellite type through the satellite mode indication, and further confirm the processing method for satellite switching and resynchronization.

[0247] Optionally, the terminal device performs packet data convergence protocol data recovery based on the packet data convergence protocol data recovery indication, for example, retransmits the data of the confirmation mode data wireless bearer after completing uplink synchronization with the target base station. Optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation.

[0248] Optionally, the terminal device performs horizontal key derivation and / or vertical key derivation based on the key update indication, for example: when the key update indication is 0, it indicates horizontal key derivation, and / or, when the key update indication is 1, it indicates vertical key derivation; or, when the key update indication is 1, it indicates horizontal key derivation, and / or, when the key update indication is 0, it indicates vertical key derivation.

[0249] Optionally, the terminal device determines whether to perform key update and / or derivation based on the satellite mode indication, for example, performing horizontal key derivation when there is a regeneration satellite signal indication, or performing vertical key derivation when there is a regeneration satellite signal indication.

[0250] Optionally, the terminal device determines whether to perform packet data convergence protocol data recovery based on the satellite mode indication, for example: when there is a regeneration satellite signal indication, packet data convergence protocol data recovery is performed, for example: after completing uplink synchronization with the target base station, the data of the confirmation mode data wireless bearer is retransmitted, optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation.

[0251] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to the key update indication.

[0252] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to a packet data convergence protocol data recovery indication.

[0253] Optionally, the terminal device further performs packet data convergence protocol data recovery by determining that the target satellite is a regeneration mode satellite to reduce data transmission delay and / or reduce service interruption time; and / or the network device determines the key update method through the key update indication and / or the packet data convergence protocol data recovery indication to reduce the signaling overhead caused by satellite switching.

[0254] Optionally, the newly introduced system message also carries the serving cell configuration (NTN-Config), the neighboring cell configuration (NTN-NeighCellConfig), the time information when the serving cell stops serving the current coverage area (t-Service), and the time information when the neighboring cell starts serving the current coverage area (t-ServiceStart). For details, please refer to the protocol TS 38.331v18.1.0.

[0255] Through the technical solution of this embodiment, the terminal device determines the processing method for satellite switching resynchronization based on at least one of the satellite mode indication, key update indication and data recovery indication in the newly introduced system message, and clarifies the processing method for satellite switching resynchronization in the regeneration mode; and / or, provides multiple methods for indicating satellite type, indicating data recovery and key derivation, so that the terminal device can determine the processing method for satellite switching resynchronization based on the newly introduced system message, improves the mechanism for the terminal device to determine the processing method for satellite switching resynchronization in the regeneration mode, reduces subsequent data transmission delay and / or service interruption time, and / or reduces signaling overhead.

[0256] Seventh embodiment

[0257] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a specific solution for a terminal device to determine a processing method for satellite switching resynchronization based on time advance information.

[0258] Optionally, the timing advance (TA) information is carried in a system message and / or a newly introduced system message.

[0259] Optionally, the timing advance information comes from a serving cell and / or a neighboring cell.

[0260] Optionally, the time advance information includes universal time advance information and / or scheduling offset time advance information.

[0261] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the serving cell is a regeneration mode satellite.

[0262] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite.

[0263] Optionally, the time advance information is used to determine the satellite type. For example, if the common time advance (ta-Common) information of the serving cell is 0 and / or the scheduling offset time advance (kmac) information is 0, it is regarded as a regenerative mode satellite.

[0264] Optionally, the terminal device determines that the serving cell and / or the neighboring cell is a regeneration mode satellite based on the time advance information of the serving cell and / or the neighboring cell. For example: if the common time advance (ta-Common) information of the serving cell is 0 and / or the scheduling offset time advance (kmac) information is 0, then the serving cell is regarded as a regeneration mode satellite; and / or, if the common time advance (ta-Common) information of the neighboring cell is 0 and / or the scheduling offset time advance (kmac) information is 0, then the neighboring cell is regarded as a regeneration mode satellite.

[0265] Optionally, the terminal device performs packet data convergence protocol data recovery and / or key derivation based on the serving cell and / or neighbor cell time advance information, for example, including at least one of the following:

[0266] When the universal time advance is 0, packet data convergence protocol data recovery is performed;

[0267] When the scheduling offset time advances to 0, packet data convergence protocol data recovery is performed;

[0268] When the universal time advance is 0, key derivation is performed;

[0269] When the scheduling offset time advance is 0, key derivation is performed;

[0270] When the universal time advance is 0, packet data convergence protocol data recovery and key derivation are performed;

[0271] When the scheduling offset time advance is 0, the packet data convergence protocol data recovery and key derivation are performed;

[0272] When the universal time advance is 0 and the scheduling offset time advance is 0, packet data convergence protocol data recovery is performed;

[0273] When the universal time advance is 0 and the scheduling offset time advance is 0, key derivation is performed;

[0274] When the universal time advance is 0 and the scheduling offset time advance is 0, packet data convergence protocol data recovery and key derivation are performed.

[0275] Through the technical solution of this embodiment, the terminal device determines the processing method for satellite switching resynchronization based on the time advance information, and clarifies the processing method for satellite switching resynchronization in the regeneration mode; and / or, provides multiple methods for indicating satellite types, indicating data recovery, and key derivation, so that the terminal device can determine the processing method for satellite switching resynchronization based on the universal time advance information and / or scheduling offset time advance information, improves the mechanism for the terminal device to determine the processing method for satellite switching resynchronization in the regeneration mode, reduces subsequent data transmission delay and / or service interruption time, and / or reduces signaling overhead.

[0276] Eighth embodiment

[0277] 9 is a flow chart of a processing method according to an eighth embodiment. The method of this embodiment can be applied to a network device (such as a satellite), and includes the following steps:

[0278] S1: Sending first information so that the terminal device determines a processing method for satellite switching resynchronization based on the first information.

[0279] Optionally, the processing method in the embodiment of the present application is used in a scenario where a satellite in regenerative mode performs switching and resynchronization.

[0280] Alternatively, the regenerative mode satellite may also be referred to as a regenerative NTN payload.

[0281] Optionally, the regenerative mode satellite is a satellite having all or part of the functionality of a conventional ground base station.

[0282] Alternatively, a regenerative mode satellite may also be referred to as a regenerative non-ground payload.

[0283] Alternatively, the transparent mode satellite may also be referred to as a transparent non-ground payload.

[0284] Optionally, the terminal device performs Packet Data Convergence Protocol (PDCP) data recovery based on the first information.

[0285] Optionally, the terminal device performs key derivation based on the first information.

[0286] Optionally, the terminal device performs key derivation including performing vertical key derivation and / or horizontal key derivation.

[0287] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0288] Optionally, the satellite handover resynchronization configuration information is carried in a system message.

[0289] Optionally, the system message may be a system information block 19 (SIB19) and / or a newly introduced system message.

[0290] Optionally, the satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication.

[0291] Optionally, the timing advance information comes from a serving cell and / or a neighboring cell.

[0292] Optionally, the time advance information includes universal time advance information and / or scheduling offset time advance information.

[0293] Optionally, the terminal device determines, based on the first information, a processing method for satellite switching resynchronization, including at least one of the following:

[0294] performing packet data convergence protocol data recovery based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0295] performing key derivation based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0296] performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information;

[0297] Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

[0298] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite based on the satellite mode indication.

[0299] Optionally, the terminal device can assist in determining the current satellite type through the satellite mode indication, and further confirm the processing method for satellite switching and resynchronization.

[0300] Optionally, the terminal device performs packet data convergence protocol data recovery according to the packet data convergence protocol data recovery indication, for example, retransmits the data of the acknowledged mode (AM) data radio bearer (DRB) after completing uplink synchronization with the target base station. Optionally, the data is a data packet (PDU, Protocol Data Unit) that was previously delivered but did not receive underlying feedback confirmation, such as: PDCP Data PDU.

[0301] Optionally, the terminal device performs horizontal key derivation and / or vertical key derivation based on the key update indication, for example: when the key update indication is 0, it indicates horizontal key derivation, and / or, when the key update indication is 1, it indicates vertical key derivation; or, when the key update indication is 1, it indicates horizontal key derivation, and / or, when the key update indication is 0, it indicates vertical key derivation.

[0302] Optionally, the terminal device determines whether to perform key update and / or derivation based on the satellite mode indication, for example, performing horizontal key derivation when there is a regeneration satellite signal indication, or performing vertical key derivation when there is a regeneration satellite signal indication.

[0303] Optionally, the terminal device determines whether to perform packet data convergence protocol data recovery based on the satellite mode indication, for example: when there is a regeneration satellite signal indication, packet data convergence protocol data recovery is performed, for example: after completing uplink synchronization with the target base station, the data of the confirmation mode data wireless bearer is retransmitted, optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation.

[0304] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to the key update indication.

[0305] Optionally, the terminal device determines that the target satellite is a regeneration mode satellite according to a packet data convergence protocol data recovery indication.

[0306] Optionally, the terminal device further performs packet data convergence protocol data recovery by determining that the target satellite is a regeneration mode satellite to reduce data transmission delay and / or reduce service interruption time; and / or the network device determines the key update method through the key update indication and / or the packet data convergence protocol data recovery indication to reduce the signaling overhead caused by satellite switching.

[0307] Optionally, the system message also carries the serving cell configuration (NTN-Config), the neighboring cell configuration (NTN-NeighCellConfig), the time information when the serving cell stops serving the current coverage area (t-Service), and the time information when the neighboring cell starts serving the current coverage area (t-ServiceStart). For details, please refer to the protocol TS 38.331v18.1.0.

[0308] Optionally, the terminal device determines that the service cell and / or neighboring cell is a regeneration mode satellite based on the newly introduced system message received. For example, if the newly introduced system message carries the service cell configuration, the service cell is regarded as a regeneration mode satellite, and / or, if the newly introduced system message carries the neighboring cell configuration, the neighboring cell is regarded as a regeneration mode satellite.

[0309] Optionally, the terminal device performs packet data convergence protocol data recovery and / or key derivation based on the newly introduced system message received, for example: retransmitting the data of the confirmation mode data wireless bearer after completing uplink synchronization with the target base station, optionally, the data is a data packet that was previously delivered but did not receive underlying feedback confirmation, and / or, performing horizontal key derivation and / or vertical key derivation.

[0310] Optionally, the newly introduced system message carries satellite handover resynchronization configuration information.

[0311] Optionally, the terminal device determines that the serving cell and / or the neighboring cell is a regeneration mode satellite based on the time advance information of the serving cell and / or the neighboring cell. For example: if the common time advance (ta-Common) information of the serving cell is 0 and / or the scheduling offset time advance (kmac) information is 0, then the serving cell is regarded as a regeneration mode satellite; and / or, if the common time advance (ta-Common) information of the neighboring cell is 0 and / or the scheduling offset time advance (kmac) information is 0, then the neighboring cell is regarded as a regeneration mode satellite.

[0312] Optionally, system messages are used to broadcast regenerative mode satellite configurations.

[0313] Optionally, the system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area.

[0314] Optionally, at least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the service satellite is a regeneration mode satellite.

[0315] Optionally, at least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the target satellite is a regeneration mode satellite.

[0316] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the serving cell is a regeneration mode satellite.

[0317] Optionally, the universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite.

[0318] Through the technical solution of this embodiment, the network device sends the first information so that the terminal device determines the processing method of satellite switching resynchronization based on the first information, so that the terminal device can clearly determine the processing method of satellite switching resynchronization in the regeneration mode according to the first information.

[0319] Ninth embodiment

[0320] Please refer to Figure 10, which is a schematic diagram of the structure of a processing device provided in an embodiment of the present application. The device can be installed in or is the terminal device in the above-mentioned method embodiment. The processing device shown in Figure 10 can be used to perform some or all of the functions of the method embodiment described in the above embodiment. As shown in Figure 10, the processing device 1100 includes:

[0321] The processing module 1101 is configured to determine a processing method for satellite switching resynchronization based on the first information.

[0322] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0323] Optionally, the device further comprises at least one of the following:

[0324] Satellite handover resynchronization configuration information is carried in the system message;

[0325] The satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0326] The timing advance information comes from the serving cell and / or neighboring cells;

[0327] The time advance information includes general time advance information and / or scheduling offset time advance information.

[0328] Optionally, determining a processing manner for satellite handover resynchronization based on the first information includes at least one of the following:

[0329] performing packet data convergence protocol data recovery based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0330] performing key derivation based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0331] performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information;

[0332] Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

[0333] Optionally, performing key derivation based on the key update indication includes at least one of the following:

[0334] When the key update indication is a first value, performing horizontal key derivation;

[0335] When the key update indication is the second value, vertical key derivation is performed.

[0336] Optionally, the device further comprises at least one of the following:

[0337] System messages are used to broadcast regenerative mode satellite configuration;

[0338] The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area;

[0339] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the serving satellite is a regenerative mode satellite;

[0340] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the target satellite is a regeneration mode satellite;

[0341] The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regenerative mode satellite;

[0342] The universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite;

[0343] The processing device is used for satellite switching resynchronization in regeneration mode.

[0344] The processing device provided in the embodiment of the present application has similar implementation principles and beneficial effects to the technical solutions shown in the above-mentioned corresponding method embodiments, and will not be described in detail here.

[0345] Tenth embodiment

[0346] Please refer to Figure 11, which is a second structural diagram of a processing device provided in an embodiment of the present application. The device can be installed in or is the network device in the above-mentioned method embodiment. The processing device shown in Figure 11 can be used to perform some or all of the functions in the method embodiment described in the above embodiment. As shown in Figure 11, the processing device 1200 includes:

[0347] The sending module 1201 is configured to send first information so that the terminal device determines a processing method for satellite switching resynchronization based on the first information.

[0348] Optionally, the first information includes satellite handover resynchronization configuration information and / or time advance information.

[0349] Optionally, the device further comprises at least one of the following:

[0350] Satellite handover resynchronization configuration information is carried in the system message;

[0351] The satellite handover resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0352] The timing advance information comes from the serving cell and / or neighboring cells;

[0353] The time advance information includes general time advance information and / or scheduling offset time advance information.

[0354] Optionally, the terminal device determines, based on the first information, a processing method for satellite switching resynchronization, including at least one of the following:

[0355] performing packet data convergence protocol data recovery based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0356] performing key derivation based on at least one of a satellite mode indication, a key update indication, and a data recovery indication;

[0357] performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information;

[0358] Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

[0359] Optionally, the terminal device performs key derivation based on the key update indication, including at least one of the following:

[0360] When the key update indication is the first value, the terminal device performs horizontal key derivation;

[0361] When the key update indication is the second value, the terminal device performs vertical key derivation.

[0362] Optionally, the device further comprises at least one of the following:

[0363] System messages are used to broadcast regenerative mode satellite configuration;

[0364] The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area;

[0365] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the serving satellite is a regenerative mode satellite;

[0366] At least one of a satellite mode indication, a key update indication, and a data recovery indication is used to determine whether the target satellite is a regeneration mode satellite;

[0367] The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regenerative mode satellite;

[0368] The universal time advance information and / or the scheduling offset time advance information is used to determine whether the neighboring cell is a regeneration mode satellite;

[0369] The processing device is used for satellite switching resynchronization in regeneration mode.

[0370] The processing device provided in the embodiment of the present application has similar implementation principles and beneficial effects to the technical solutions shown in the above-mentioned corresponding method embodiments, and will not be described in detail here.

[0371] Refer to Figure 12, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 12, the communication device 160 described in this embodiment can be the terminal device (or component that can be used for a terminal device) or network device (or component that can be used for a network device) mentioned in the aforementioned method embodiment. The communication device 160 can be used to implement the methods corresponding to the terminal device or network device described in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment.

[0372] The communication device 160 may include one or more processors 161, also referred to as processing units, which may perform certain control or processing functions. Processor 161 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, while the central processing unit may be used to control the communication device, execute software programs, and process software program data.

[0373] Optionally, the processor 161 may also store instructions 163 or data (eg, intermediate data). Optionally, the instructions 163 may be executed by the processor 161 to enable the communication device 160 to execute the method corresponding to the terminal device or network device described in the above method embodiment.

[0374] Optionally, the communication device 160 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments.

[0375] Optionally, the communication device 160 may include one or more memories 162 , on which instructions 164 may be stored. The instructions may be executed on the processor 161 , so that the communication device 160 performs the method described in the above method embodiment.

[0376] Optionally, data may also be stored in the memory 162. The processor 161 and the memory 162 may be provided separately or integrated together.

[0377] Optionally, the communication device 160 may further include a transceiver 165 and / or an antenna 166. The processor 161 may be referred to as a processing unit, and controls the communication device 160 (terminal device, core network device, or wireless access network device). The transceiver 165 may be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, and is used to implement the transceiver functions of the communication device 160.

[0378] Optionally, if the communication device 160 is used to implement operations corresponding to the terminal device in the above embodiments, for example, the transceiver 165 can receive the first information; and the processor 161 can determine the processing method for satellite switching resynchronization based on the first information.

[0379] Optionally, the specific implementation process of the processor 161 and the transceiver 165 can refer to the relevant description of the above embodiments, which will not be repeated here.

[0380] Optionally, if the communication device 160 is used to implement operations corresponding to the network devices in the above embodiments, for example, the transceiver 165 may send first information for the terminal device to determine a processing method for satellite switching resynchronization based on the first information.

[0381] Optionally, the specific implementation process of the processor 161 and the transceiver 165 can refer to the relevant description of the above embodiments, which will not be repeated here.

[0382] The processor 161 and transceiver 165 described in this application can be implemented on an IC (Integrated Circuit), an analog integrated circuit, an RFIC (Radio Frequency Integrated Circuit), a mixed-signal integrated circuit, an ASIC (Application Specific Integrated Circuit), a PCB (Printed Circuit Board), an electronic device, etc. The processor 161 and transceiver 165 can also be manufactured using various integrated circuit process technologies, such as CMOS (Complementary Metal Oxide Semiconductor), NMOS (N Metal-Oxide-Semiconductor), PMOS (Positive Channel Metal Oxide Semiconductor), BJT (Bipolar Junction Transistor), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc. In this application, a communication device can be a terminal device (such as a mobile phone) or a network device (such as a base station), which needs to be determined according to the context. In addition, the terminal device can be implemented in various forms. For example, the terminal devices described in this application may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminal devices such as digital TVs and desktop computers.

[0383] Although the communication device is described above by taking a terminal device or a network device as an example, the scope of the communication device described in this application is not limited to the above-mentioned terminal device or network device, and the structure of the communication device may not be limited to Figure 12. The communication device may be an independent device or may be part of a larger device.

[0384] An embodiment of the present application further provides a communication system, including: a terminal device as in any of the above embodiments; and a network device as in any of the above embodiments.

[0385] An embodiment of the present application also provides a communication device, including a memory and a processor, wherein a processing program is stored in the memory, and when the processing program is executed by the processor, the steps of the processing method in any of the above embodiments are implemented.

[0386] The communication equipment in this application can be a terminal device (such as a mobile phone) or a network device (such as a satellite). The specific reference needs to be clarified based on the context.

[0387] An embodiment of the present application further provides a computer-readable storage medium, on which a processing program is stored. When the processing program is executed by a processor, the steps of the processing method in any of the above embodiments are implemented.

[0388] In the embodiments of the communication device and computer-readable storage medium provided in the embodiments of the present application, all technical features of any of the above-mentioned processing method embodiments may be included. The expanded and explained contents of the specification are basically the same as those of the embodiments of the above-mentioned methods and will not be repeated here.

[0389] The present application also provides a computer program product, which includes computer program code. When the computer program code is executed on a computer, the computer executes the methods described in the various possible embodiments. The present application also provides a chip, which includes a memory and a processor. The memory is used to store the computer program, and the processor is used to call and execute the computer program from the memory, so that a device equipped with the chip executes the methods described in the various possible embodiments.

[0390] It will be understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application may also be applied to other scenarios. For example, those skilled in the art will appreciate that, as system architectures evolve and new business scenarios emerge, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems. The serial numbers of the above embodiments of this application are for descriptive purposes only and do not represent the merits of the embodiments. The steps in the methods of the embodiments of this application may be reordered, combined, or deleted as needed. The units in the devices of the embodiments of this application may be combined, divided, or deleted as needed. In this application, the same or similar terms, concepts, technical solutions, and / or application scenario descriptions are generally described in detail only the first time they appear. For the sake of brevity, they are generally not repeated when they appear again. When understanding the technical solutions and other contents of this application, reference can be made to the previous detailed descriptions for the same or similar terms, concepts, technical solutions, and / or application scenario descriptions that are not described in detail later. In this application, the descriptions of each embodiment have their own focus. For parts not described or recorded in detail in a particular embodiment, reference can be made to the relevant descriptions of other embodiments. The various technical features of the technical solution of this application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0391] Through the description of the above embodiments, it will be clear to those skilled in the art that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application is essentially or partly contributed to the prior art and can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as above, including several instructions for enabling a terminal device (which can be a mobile phone, computer, server, controlled terminal device, or network device, etc.) to execute the method of each embodiment of the present application. In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a storage disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)). The above are only preferred embodiments of the present application and do not limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present application.

Claims

1. A processing method, wherein: Applied to terminal equipment, including the steps of: S2: Determine a processing method for satellite switching resynchronization based on the first information.

2. The method of claim 1, wherein: The first information includes satellite handover resynchronization configuration information and / or time advance information.

3. The method of claim 2, wherein: Include at least one of the following: Satellite switching resynchronization configuration information is carried in the system message; The satellite switching resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication; The time advance information comes from the serving cell and / or the neighboring cell; The time advance information includes general time advance information and / or scheduling offset time advance information.

4. The method of claim 3, wherein: Step S2 includes at least one of the following: performing packet data convergence protocol data recovery based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; performing key derivation based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information; Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

5. The method of claim 4, wherein: Performing key derivation based on the key update indication includes at least one of the following: When the key update indication is a first value, performing horizontal key derivation; When the key update indication is the second value, vertical key derivation is performed.

6. The method of claim 3, wherein: Also includes at least one of the following: System messages are used to broadcast regenerative mode satellite configuration; The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area; At least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the service satellite is a regeneration mode satellite; At least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the target satellite is a regeneration mode satellite; The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regeneration mode satellite; The general time advance information and / or the scheduling offset time advance information are used to determine whether the neighboring cell is a regeneration mode satellite; The processing method is used for regeneration mode satellite switching resynchronization.

7. A processing method, wherein: Applied to network equipment, including the steps of: S1: Sending first information so that the terminal device determines a processing method for satellite switching resynchronization based on the first information.

8. The method of claim 7, wherein: The first information includes satellite handover resynchronization configuration information and / or time advance information.

9. The method of claim 8, wherein: Include at least one of the following: Satellite switching resynchronization configuration information is carried in the system message; The satellite switching resynchronization configuration information includes at least one of a satellite mode indication, a key update indication, and a data recovery indication; The time advance information comes from the serving cell and / or the neighboring cell; The time advance information includes general time advance information and / or scheduling offset time advance information.

10. The method of claim 9, wherein: The terminal device determines a processing method for satellite switching resynchronization based on the first information, including at least one of the following: performing packet data convergence protocol data recovery based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; performing key derivation based on at least one of the satellite mode indication, the key update indication, and the data recovery indication; performing packet data convergence protocol data recovery based on the universal time advance information and / or the scheduling offset time advance information; Based on the universal time advance information and / or the scheduling offset time advance information, key derivation is performed.

11. The method of claim 10, wherein: The terminal device performs key derivation based on the key update indication, including at least one of the following: When the key update indication is a first value, the terminal device performs horizontal key derivation; When the key update indication is the second value, the terminal device performs vertical key derivation.

12. The method of claim 9, wherein: Also includes at least one of the following: System messages are used to broadcast regenerative mode satellite configuration; The system message carries at least one of the serving cell configuration, the neighboring cell configuration, the time information when the serving cell stops serving the current coverage area, and the time information when the neighboring cell starts serving the current coverage area; At least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the service satellite is a regeneration mode satellite; At least one of the satellite mode indication, the key update indication, and the data recovery indication is used to determine whether the target satellite is a regeneration mode satellite; The universal time advance information and / or the scheduling offset time advance information are used to determine whether the serving cell is a regeneration mode satellite; The general time advance information and / or the scheduling offset time advance information are used to determine whether the neighboring cell is a regeneration mode satellite; The processing method is used for regeneration mode satellite switching resynchronization.

13. A communication device, wherein: include: A memory, a processor, and a processing program stored in the memory and executable on the processor, wherein the processing program implements the processing method according to claim 1 or 7 when executed by the processor.

14. A computer-readable storage medium, wherein: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processing method according to claim 1 or 7 is implemented.

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