WO2025020960A1

WO2025020960A1 - Failure processing method for synchronization process, synchronization processing method, and related device

Info

Publication number: WO2025020960A1
Application number: PCT/CN2024/105457
Authority: WO
Inventors: 何燃燃; 张艳霞
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2023-07-21
Filing date: 2024-07-15
Publication date: 2025-01-30
Anticipated expiration: 2026-01-21
Also published as: CN119342570A

Abstract

The present application belongs to the technical field of communications. Disclosed are a failure processing method for a synchronization process, a synchronization processing method, and a related device. The failure processing method for a synchronization process in the embodiments of the present application comprises: a terminal executing a first synchronization process at a first moment; and when the first synchronization process is not completed, the terminal executing a first operation, wherein the first operation comprises any one of the following: executing a second synchronization process; initiating a radio resource control (RRC) connection reestablishment process; and entering an RRC idle state, wherein the first synchronization process and the second synchronization process each comprise at least one of a time synchronization process and a frequency synchronization process.

Description

Failure handling method of synchronization process, synchronization handling method and related equipment

相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS

本申请主张在2023年07月21日在中国提交的中国专利申请No.202310901283.6的优先权，其全部内容通过引用包含于此。This application claims priority to Chinese Patent Application No. 202310901283.6 filed in China on July 21, 2023, the entire contents of which are incorporated herein by reference.

Technical Field

本申请属于通信技术领域，具体涉及一种同步过程的失败处理方法、同步处理方法及相关设备。The present application belongs to the field of communication technology, and specifically relates to a synchronization process failure processing method, a synchronization processing method and related equipment.

Background Art

随着通信技术的发展，基于卫星的非地面网络(Non-Terrestrial Network，NTN)通信系统应用越来越广泛。目前，终端在发生服务链路切换的情况下，通常需要执行层3(Layer 3，L3)切换。然而由于低轨卫星相对于地面移动，终端需要频繁更换小区，即可能需要频繁执行L3切换流程，该过程中可能会涉及同步过程的频繁执行，这样将会导致信令开销较大。With the development of communication technology, satellite-based non-terrestrial network (NTN) communication systems are becoming more and more widely used. At present, when a service link switch occurs, the terminal usually needs to perform Layer 3 (L3) switching. However, since low-orbit satellites move relative to the ground, the terminal needs to frequently change cells, that is, it may need to frequently perform L3 switching processes, which may involve frequent execution of synchronization processes, which will result in large signaling overhead.

发明内容Summary of the invention

本申请实施例提供一种同步过程的失败处理方法、同步处理方法及相关设备，能够解决信令开销较大的问题。The embodiments of the present application provide a synchronization process failure handling method, a synchronization processing method and related equipment, which can solve the problem of large signaling overhead.

第一方面，提供了一种同步过程的失败处理方法，包括：In a first aspect, a method for handling failure of a synchronization process is provided, comprising:

终端在第一时刻执行第一同步过程；The terminal performs a first synchronization process at a first moment;

在所述第一同步过程未完成的情况下，终端执行第一操作；When the first synchronization process is not completed, the terminal performs a first operation;

其中，所述第一操作包括以下任一项：The first operation includes any one of the following:

执行第二同步过程；executing a second synchronization process;

发起无线资源控制RRC连接重建流程；Initiate the radio resource control RRC connection reestablishment process;

进入RRC空闲态；Enter RRC idle state;

其中，所述第一同步过程和所述第二同步过程均包括时间同步过程和频率同步过程中的至少一者。The first synchronization process and the second synchronization process both include at least one of a time synchronization process and a frequency synchronization process.

第二方面，提供了一种同步处理方法，包括：In a second aspect, a synchronization processing method is provided, including:

网络侧设备向终端发送第一信息，所述第一信息用于确定终端执行第一同步过程的第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；The network side device sends first information to the terminal, where the first information is used to determine a first moment when the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or a system message; third indication information and information used to indicate when the serving cell stops serving;

其中，所述时间信息包括以下任一项：目标卫星开始提供覆盖的时刻，所述目标卫星为终端需要接入的卫星；服务小区停止服务的时刻和预设时间偏移；预设时间偏移； The time information includes any one of the following: the time when the target satellite starts to provide coverage, the target satellite is the satellite that the terminal needs to access; the time when the service cell stops service and the preset time offset; the preset time offset;

所述第三指示信息用于指示服务小区支持以下任一项：在服务链路切换的情况下，终端认为物理小区标识符PCI不改变；在服务链路切换的情况下，终端不执行层3切换；在服务链路切换的情况下，终端执行同步过程；在所述第一时刻执行同步过程。The third indication information is used to indicate that the service cell supports any one of the following items: in the case of service link switching, the terminal considers that the physical cell identifier PCI does not change; in the case of service link switching, the terminal does not perform layer 3 switching; in the case of service link switching, the terminal performs a synchronization process; and performs the synchronization process at the first moment.

第三方面，提供了一种同步过程的失败处理装置，包括：In a third aspect, a synchronization process failure processing device is provided, including:

第一执行模块，用于在第一时刻执行第一同步过程；A first execution module, configured to execute a first synchronization process at a first moment;

第二执行模块，在所述第一同步过程未完成的情况下，终端执行第一操作；A second execution module, when the first synchronization process is not completed, the terminal executes a first operation;

执行第二同步过程；executing a second synchronization process;

进入RRC空闲态；Enter RRC idle state;

第四方面，提供了一种同步处理装置，包括：In a fourth aspect, a synchronization processing device is provided, including:

第一发送模块，用于向终端发送第一信息，所述第一信息用于确定终端执行第一同步过程的第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；A first sending module, configured to send first information to a terminal, wherein the first information is used to determine a first moment at which the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or a system message; third indication information and information used to indicate when a serving cell stops serving;

其中，所述时间信息包括以下任一项：目标卫星开始提供覆盖的时刻，所述目标卫星为终端需要接入的卫星；服务小区停止服务的时刻和预设时间偏移；预设时间偏移；The time information includes any one of the following: the time when the target satellite starts to provide coverage, the target satellite is the satellite that the terminal needs to access; the time when the service cell stops service and the preset time offset; the preset time offset;

第五方面，提供了一种终端，该终端包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第一方面所述的方法的步骤。In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

第六方面，提供了一种终端，包括处理器及通信接口，其中，所述通信接口用于在第一时刻执行第一同步过程；在所述第一同步过程未完成的情况下，终端执行第一操作；In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to perform a first synchronization process at a first moment; when the first synchronization process is not completed, the terminal performs a first operation;

执行第二同步过程；executing a second synchronization process;

进入RRC空闲态；Enter RRC idle state;

第七方面，提供了一种网络侧设备，该网络侧设备包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第二方面所述的方法的步骤。 In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

第八方面，提供了一种网络侧设备，包括处理器及通信接口，其中，所述通信接口用于向终端发送第一信息，所述第一信息用于确定终端执行第一同步过程的第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；In an eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send first information to a terminal, the first information being used to determine a first moment at which the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or a system message; third indication information and information used to indicate when a serving cell stops serving;

第九方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第一方面所述的方法的步骤，或者实现如第二方面所述的方法的步骤。In a ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

第十方面，提供了一种无线通信系统，包括：终端及网络侧设备，所述终端可用于执行如第一方面所述的方法的步骤，所述网络侧设备可用于执行如第二方面所述的方法的步骤。In the tenth aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

第十一方面，提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第一方面所述的方法，或实现如第二方面所述的方法。In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

第十二方面，提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述程序/程序产品被至少一个处理器执行以实现如第一方面所述的方法，或实现如第二方面所述的方法。In the twelfth aspect, a computer program/program product is provided, wherein the computer program/program product is stored in a storage medium, and the program/program product is executed by at least one processor to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

本申请实施例通过终端在第一时刻执行第一同步过程；在所述第一同步过程未完成的情况下，终端执行第一操作；其中，所述第一操作包括以下任一项：执行第二同步过程；发起无线资源控制RRC连接重建流程；进入RRC空闲态；其中，所述第一同步过程和所述第二同步过程均包括时间同步过程和频率同步过程中的至少一者。这样，明确了终端在第一时刻执行第一同步过程，并在第一同步过程未完成的情况下终端的行为，从而可以在发送服务链路切换时无需进行L3切换流程，因此减小了信令开销。In the embodiment of the present application, the terminal performs a first synchronization process at a first moment; when the first synchronization process is not completed, the terminal performs a first operation; wherein the first operation includes any one of the following: performing a second synchronization process; initiating a radio resource control RRC connection reconstruction process; entering an RRC idle state; wherein the first synchronization process and the second synchronization process both include at least one of a time synchronization process and a frequency synchronization process. In this way, it is clarified that the terminal performs the first synchronization process at the first moment, and the behavior of the terminal when the first synchronization process is not completed, so that the L3 switching process does not need to be performed when sending a service link switch, thereby reducing the signaling overhead.

BRIEF DESCRIPTION OF THE DRAWINGS

图1是本申请实施例可应用的一种无线通信系统的框图；FIG1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

图2是本申请实施例可应用的非地面网络的结构示意图；FIG2 is a schematic diagram of a non-terrestrial network structure applicable to embodiments of the present application;

图3是本申请实施例中服务链路切换示意图；FIG3 is a schematic diagram of a service link switching in an embodiment of the present application;

图4是本申请实施例提供的一种同步过程的失败处理方法的流程示意图；FIG4 is a flow chart of a method for handling failure of a synchronization process provided in an embodiment of the present application;

图5是本申请实施例提供的一种同步处理方法的流程示意图；FIG5 is a schematic diagram of a flow chart of a synchronization processing method provided in an embodiment of the present application;

图6是本申请实施例提供的一种同步过程的失败处理装置的结构示意图； FIG6 is a schematic diagram of the structure of a failure processing device for a synchronization process provided by an embodiment of the present application;

图7是本申请实施例提供的一种同步处理装置的结构示意图；FIG7 is a schematic diagram of the structure of a synchronization processing device provided in an embodiment of the present application;

图8是本申请实施例提供的一种通信设备的结构示意图；FIG8 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

图9是本申请实施例提供的一种终端的结构示意图；FIG9 is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

图10是本申请实施例提供的一种网络侧设备的结构示意图。FIG. 10 is a schematic diagram of the structure of a network-side device provided in an embodiment of the present application.

DETAILED DESCRIPTION

本申请的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。此外，本申请中的“或”表示所连接对象的至少其中之一。例如“A或B”涵盖三种方案，即，方案一：包括A且不包括B；方案二：包括B且不包括A；方案三：既包括A又包括B。字符“/”一般表示前后关联对象是一种“或”的关系。The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character "/" generally indicates that the objects associated with each other are in an "or" relationship.

本申请的术语“指示”既可以是一个直接的指示(或者说显式的指示)，也可以是一个间接的指示(或者说隐含的指示)。其中，直接的指示可以理解为，发送方在发送的指示中明确告知了接收方具体的信息、需要执行的操作或请求结果等内容；间接的指示可以理解为，接收方根据发送方发送的指示确定对应的信息，或者进行判断并根据判断结果确定需要执行的操作或请求结果等。The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-FDMA)或其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，但是这些技术也可应用于NR系统以外的系统，如第6代(6^th Generation，6G)通信系统。It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as ^6th Generation (6G) communication systems.

图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络侧设备12。其中，终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、笔记本电脑、个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(Ultra-mobile Personal Computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、增强现实(Augmented Reality，AR)、虚拟现实(Virtual Reality，VR)设备、机器人、可穿戴式设备(Wearable Device)、飞行器(flight vehicle)、车载设备(Vehicle User Equipment，VUE)、船载设备、行人终端(Pedestrian User Equipment， PUE)、智能家居(具有无线通信功能的家居设备，如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(Personal Computer，PC)、柜员机或者自助机等终端侧设备。可穿戴式设备包括：智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。其中，车载设备也可以称为车载终端、车载控制器、车载模块、车载部件、车载芯片或车载单元等。需要说明的是，在本申请实施例并不限定终端11的具体类型。网络侧设备12可以包括接入网设备或核心网设备，其中，接入网设备也可以称为无线接入网(Radio Access Network,RAN)设备、无线接入网功能或无线接入网单元。接入网设备可以包括基站、无线局域网(Wireless Local Area Network，WLAN)接入点(Access Point，AS)或无线保真(Wireless Fidelity，WiFi)节点等。其中，基站可被称为节点B(Node B，NB)、演进节点B(Evolved Node B，eNB)、下一代节点B(the next generation Node B，gNB)、新空口节点B(New Radio Node B，NR Node B)、接入点、中继站(Relay Base Station，RBS)、服务基站(Serving Base Station，SBS)、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、家用B节点(home Node B，HNB)、家用演进型B节点(home evolved Node B)、发送接收点(Transmission Reception Point，TRP)或所属领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本申请实施例中仅以NR系统中的基站为例进行介绍，并不限定基站的具体类型。FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian terminal (Pedestrian User Equipment, The terminal side devices 12 include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted equipment can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc. Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B (home evolved Node B), a Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

核心网设备可以包含但不限于如下至少一项：核心网节点、核心网功能、移动管理实体(Mobility Management Entity，MME)、接入移动管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、用户平面功能(User Plane Function，UPF)、策略控制功能(Policy Control Function，PCF)、策略与计费规则功能单元(Policy and Charging Rules Function，PCRF)、边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)、统一数据管理(Unified Data Management，UDM)、统一数据仓储(Unified Data Repository，UDR)、归属用户服务器(Home Subscriber Server，HSS)、集中式网络配置(Centralized network configuration，CNC)、网络存储功能(Network Repository Function，NRF)、网络开放功能(Network Exposure Function，NEF)、本地NEF(Local NEF，或L-NEF)、绑定支持功能(Binding Support Function，BSF)、应用功能(Application Function，AF)等。需要说明的是，在本申请实施例中仅以NR系统中的核心网设备为例进行介绍，并不限定核心网设备的具体类型。The core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery ... user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user plane function (User Plane Function, UPF), user ion, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is taken as an example for introduction, and the specific type of the core network device is not limited.

为了方便理解，以下对本申请实施例涉及的一些内容进行说明：For ease of understanding, some contents involved in the embodiments of the present application are described below:

一、非地面网络。1. Non-terrestrial network.

非地面网络是指采用卫星或者无人机系统(Unmanned Aircraft System，UAS)平台或者高空通信平台(High-Altitude Platform System，HAPS)进行传输的网络或网络段，相对于地面通信系统，基于卫星的非地面通信系统具有更为广阔的覆盖范围，适用的典型场景包括无法建设地面基站和地面基站损坏的情况，比如偏远山区、沙漠、海洋、森林中的连续覆盖，或是发生自然灾害，地面基站损坏时的应急通信。Non-terrestrial networks refer to networks or network segments that use satellites or unmanned aircraft systems (UAS) platforms or high-altitude communication platforms (HAPS) for transmission. Compared with terrestrial communication systems, satellite-based non-terrestrial communication systems have a wider coverage range and are suitable for typical scenarios including: This includes situations where ground base stations cannot be built or are damaged, such as continuous coverage in remote mountainous areas, deserts, oceans, and forests, or emergency communications when ground base stations are damaged during natural disasters.

卫星：包括低轨道(Low Earth Orbiting，LEO)卫星，中轨道(Medium Earth Orbiting，MEO)卫星，对地静止轨道(Geostationary Earth Orbiting，GEO)卫星以及高椭圆轨道(Highly Elliptical Orbiting，HEO)卫星。Satellite: including Low Earth Orbiting (LEO) satellites, Medium Earth Orbiting (MEO) satellites, Geostationary Earth Orbiting (GEO) satellites and Highly Elliptical Orbiting (HEO) satellites.

非地面网络的典型场景包括透明转发式，即卫星作为转发中继，如图2所示。其中，卫星与终端的链路为服务链路(Service Link)，卫星与地面基站的链路为反馈链路(Feeder Link)。Typical scenarios of non-terrestrial networks include transparent forwarding, that is, the satellite acts as a forwarding relay, as shown in Figure 2. Among them, the link between the satellite and the terminal is the service link (Service Link), and the link between the satellite and the ground base station is the feedback link (Feeder Link).

需要指出的是，由于卫星与基站和UE之间的距离非常大，会造成很大的基站-卫星及卫星-UE之间的无线链路损耗，从而导致NTN通信的无线链路预算极低，进而只能支持非常低的无线传输速率。It should be pointed out that since the distance between the satellite and the base station and UE is very large, it will cause a large loss in the wireless link between the base station and the satellite and between the satellite and the UE, resulting in an extremely low wireless link budget for NTN communication, and thus only supporting a very low wireless transmission rate.

二、NTN部署方式及服务链路切换。2. NTN deployment methods and service link switching.

按照小区部署方式不同，可以分为以下部署方式：According to different cell deployment methods, it can be divided into the following deployment methods:

对地移动小区(Earth-moving cell)：小区(地面覆盖区域)随着时间移动；Earth-moving cell: The cell (ground coverage area) moves over time;

对地准静止小区(Quasi-earth-fixed cell)：小区在一段时间内覆盖一个地理区域，在另一段时间内覆盖不同的地理区域(例如，卫星可以通过产生可转向波束实现该场景)；Quasi-earth-fixed cell: A cell covers one geographic area at one time and a different geographic area at another time (for example, a satellite can achieve this by generating a steerable beam);

对地静止小区(Earth-fixed cell)：小区一直覆盖同一片地理区域(例如地球同步卫星提供的小区覆盖)。Geostationary cell: A cell that covers the same geographical area at all times (e.g. cell coverage provided by geostationary satellites).

可选地，对于基于低或中轨卫星NTN，其可以采用基于Quasi-earth-fixed cell的部署方式。卫星可以通过调整服务链路的天线方向，保持其所提供的小区在一定时间段内覆盖固定的地理区域。由于卫星的移动，其对给定区域的小区覆盖将在一段时间后消失，而给定区域将由后续到达的卫星服务链路所提供的小区继续覆盖。Alternatively, for NTN based on low or medium orbit satellites, a Quasi-earth-fixed cell-based deployment method can be adopted. The satellite can adjust the antenna direction of the service link to keep the cell it provides covering a fixed geographical area for a certain period of time. Due to the movement of the satellite, its cell coverage of a given area will disappear after a period of time, and the given area will continue to be covered by the cell provided by the subsequent satellite service link.

例如，卫星1在一段时间内为下图中的地理区域提供小区覆盖；而随着卫星1的移动，一段时间后，其将停止图是区域的覆盖、而由后续到达的卫星2提供小区继续覆盖。For example, satellite 1 provides cell coverage for the geographical area in the figure below for a period of time; and as satellite 1 moves, after a period of time, it will stop covering the area in the figure, and the cell coverage will continue to be provided by satellite 2 that arrives later.

如上所述，由不同卫星相继对给定区域提供小区覆盖，且连接的地面基站(gNB)不改变的场景，称为“服务链路切换(Service link switch)”。As mentioned above, the scenario in which different satellites successively provide cell coverage for a given area and the connected ground base station (gNB) does not change is called "service link switch".

可选地，针对上述“服务链路切换”的场景，卫星2和卫星1须使用不同的小区为给定区域提供覆盖，即图3中物理小区标识符(Physical Cell Identifier，PCI)1到PCI 2的改变。这意味着，针对给定区域，服务链路切换将带来地面小区的改变，从而要求网络必须为所在区域的UE触发层3切换(L3 handover)流程，以使得UE完成对新小区(即图3中卫星2提供的小区)的接入。Optionally, for the above-mentioned "service link switching" scenario, satellite 2 and satellite 1 must use different cells to provide coverage for a given area, i.e., the change from Physical Cell Identifier (PCI) 1 to PCI 2 in Figure 3. This means that for a given area, service link switching will bring about a change in the terrestrial cell, requiring the network to trigger a layer 3 handover (L3 handover) process for the UE in the area, so that the UE can complete access to the new cell (i.e., the cell provided by satellite 2 in Figure 3).

由于低轨卫星相对于地面移动，终端需要频繁更换小区，执行L3切换流程。例如，NTN小区覆盖的面积大，小区内的终端数量大，服务链路切换时，小区内所有终端需要执行L3切换，导致大量的信令开销。为了节省切换的信令开销，可以考虑在对地准静止场景下，若发生了服务链路切换，认为PCI不改变(即不需要L3 mobility)。更进一步的，卫星改变了，终端可能失步，终端需要重新进行同步。为此提出了本申请同步过程的失败处理方法。Since low-orbit satellites move relative to the ground, terminals need to frequently change cells and perform L3 handover procedures. For example, NTN cells cover a large area and have a large number of terminals in the cell. When the service link is switched, all terminals in the cell need to perform L3 handover, resulting in a large amount of signaling overhead. In order to save the signaling overhead of switching, it can be considered that in a quasi-stationary scenario, if a service link switch occurs, the PCI is considered unchanged (i.e., L3 mobility is not required). Furthermore, satellite changes The terminal may be out of sync, and the terminal needs to be resynchronized. Therefore, a failure handling method of the synchronization process of this application is proposed.

下面结合附图，通过一些实施例及其应用场景对本申请实施例提供的同步过程的失败处理方法进行详细地说明。The following is a detailed description of the failure handling method of the synchronization process provided by the embodiment of the present application through some embodiments and their application scenarios in combination with the accompanying drawings.

参照图4，本申请实施例还提供了一种同步过程的失败处理方法，如图4所示，该同步过程的失败处理方法包括：Referring to FIG. 4 , an embodiment of the present application further provides a method for handling failure of a synchronization process. As shown in FIG. 4 , the method for handling failure of a synchronization process includes:

步骤401，终端在第一时刻执行第一同步过程；Step 401, the terminal performs a first synchronization process at a first moment;

步骤402，在所述第一同步过程未完成的情况下，终端执行第一操作；Step 402: When the first synchronization process is not completed, the terminal performs a first operation;

执行第二同步过程；executing a second synchronization process;

发起无线资源控制(Radio Resource Control，RRC)连接重建流程；Initiate the Radio Resource Control (RRC) connection reestablishment process;

进入RRC空闲态；Enter RRC idle state;

本申请实施例中，上述终端接入的小区可以为对地准静止小区。此时，在发生服务链路切换时，可以认为PCI没有改变，从而通过第一同步过程后可以实现与网络侧设备的同步，进而减少发生服务链路切换导致的信令开销。In the embodiment of the present application, the cell accessed by the above terminal may be a quasi-stationary cell. At this time, when the service link switching occurs, it can be considered that the PCI has not changed, so that synchronization with the network side device can be achieved through the first synchronization process, thereby reducing the signaling overhead caused by the service link switching.

可选地，上述第一同步过程可以理解为基于服务链路切换执行的同步过程。Optionally, the first synchronization process mentioned above can be understood as a synchronization process performed based on service link switching.

可选地，上述第一同步过程未完成可以理解为基于第一同步过程未完成时间同步和频率同步中的至少一项。Optionally, the failure to complete the first synchronization process may be understood as failure to complete at least one of time synchronization and frequency synchronization in the first synchronization process.

可选地，在一些实施例中，所述第一同步过程和所述第二同步过程中的至少一者满足一下任意一项：Optionally, in some embodiments, at least one of the first synchronization process and the second synchronization process satisfies any one of the following:

通过随机接入信道(Random Access Channel，RACH)过程执行的同步过程；The synchronization process is performed through the Random Access Channel (RACH) process;

通过无随机接入信道RACH-less过程执行的同步过程。The synchronization procedure is performed through the RACH-less procedure.

可选地，上述第一时刻可以由网络侧设备指示，或者基于网络侧设备指示的信息确定。Optionally, the first moment may be indicated by a network-side device, or determined based on information indicated by the network-side device.

需要说明的是，第一操作包括执行第二同步过程可以理解为：终端可以在同一小区上继续执行同步，终端不用重新接入其他小区，节省了重配置的信令开销。It should be noted that the first operation including executing the second synchronization process can be understood as: the terminal can continue to execute synchronization on the same cell, and the terminal does not need to re-access other cells, thereby saving the signaling overhead of reconfiguration.

第一操作包括发起RRC连接重建流程可以理解为：在当前的小区(即用于执行第一同步过程的第一小区)信号质量不好的情况下，尝试连接其他小区，保证服务的连续性。The first operation includes initiating an RRC connection reestablishment process, which can be understood as: when the signal quality of the current cell (ie, the first cell used to perform the first synchronization process) is poor, attempting to connect to other cells to ensure service continuity.

第一操作包括进入RRC空闲态可以理解为：终端可以进行本地释放(local release)进入RRC空闲态，避免一直尝试接入小区，节省信令开销。The first operation includes entering the RRC idle state, which can be understood as: the terminal can perform local release (local release) to enter the RRC idle state, avoiding continuous attempts to access the cell and saving signaling overhead.

本申请实施例通过终端在第一时刻执行第一同步过程；在所述第一同步过程未完成的情况下，终端执行第一操作；其中，所述第一操作包括以下任一项：执行第二同步过程；发起无线资源控制RRC连接重建流程；进入RRC空闲态；其中，所述第一同步过程和所述第二同步过程均包括时间同步过程和频率同步过程中的至少一者。这样，明确了终端在第一时刻执行第一同步过程，并在第一同步过程未完成的情况下终端的行为，从而可以在发送服务链路切换时无需进行L3切换流程，因此减小了信令开销。In the embodiment of the present application, the terminal performs a first synchronization process at a first moment; when the first synchronization process is not completed, the terminal performs a first operation; wherein the first operation includes any one of the following: performing a second synchronization process; initiating a radio resource control RRC connection reestablishment process; entering an RRC idle state; wherein the first synchronization process and the second synchronization process both include at least one of a time synchronization process and a frequency synchronization process. In this way, it is clarified that the terminal performs the first synchronization process at the first moment, and the behavior of the terminal when the first synchronization process is not completed, so that When sending a service link switch, there is no need to perform an L3 switching process, thereby reducing signaling overhead.

可选地，在一些实施例中，在所述第一同步过程未完成的情况下，终端执行第一操作包括：Optionally, in some embodiments, when the first synchronization process is not completed, the terminal performing a first operation includes:

在所述第一同步过程未完成的情况下，所述终端认为满足第一失败事件，所述第一失败事件包括无线链路失败或第一同步过程失败；In a case where the first synchronization process is not completed, the terminal considers that a first failure event is satisfied, where the first failure event includes a radio link failure or a first synchronization process failure;

在所述终端认为满足所述第一失败事件的情况下，所述终端执行所述第一操作。When the terminal considers that the first failure event is satisfied, the terminal performs the first operation.

可选地，在一些实施例中，在所述第一同步过程未完成的情况下，所述终端认为满足第一失败事件，包括以下至少一项：Optionally, in some embodiments, when the first synchronization process is not completed, the terminal considers that a first failure event is satisfied, including at least one of the following:

在所述第一同步过程为通过RACH过程执行的同步过程，且所述终端的RRC层在第一时间窗外接收到终端的媒体接入控制(Media Access Control，MAC)层指示的随机接入问题的情况下，所述终端认为满足第一失败事件；In a case where the first synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by a Media Access Control (MAC) layer of the terminal outside a first time window, the terminal considers that a first failure event is satisfied;

在所述第一同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第一预设次数的情况下，所述终端认为满足第一失败事件；When the first synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a first preset number, the terminal considers that a first failure event is satisfied;

在所述第一同步过程为通过RACH-less过程执行的同步过程，且在第一时间窗内同步过程未完成的情况下，所述终端认为满足第一失败事件；When the first synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a first time window, the terminal considers that a first failure event is satisfied;

其中，所述第一时间窗为用于执行所述第一同步过程的时间窗。The first time window is a time window used to execute the first synchronization process.

本申请实施例中，在所述第一同步过程为通过RACH过程执行的同步过程的情况下，若RRC层收到X(X小于第一预设次数的取值)次MAC层指示的随机接入问题，终端认为不满足第一失败事件，直到RRC层收到了N次MAC层指示的随机接入问题，终端认为满足第一失败事件。其中，N等于上述第一预设次数的取值。In the embodiment of the present application, when the first synchronization process is a synchronization process performed through a RACH process, if the RRC layer receives X (X is less than the value of the first preset number of times) random access problems indicated by the MAC layer, the terminal considers that the first failure event is not satisfied, until the RRC layer receives N random access problems indicated by the MAC layer, the terminal considers that the first failure event is satisfied. Wherein N is equal to the value of the above-mentioned first preset number of times.

可选地，在一些实施例中，若在第一时间窗内，终端没有完成同步(即没有第一同步过程未完成)，所述终端认为满足第一失败事件。例如，在所述第一同步过程为通过RACH过程执行的同步过程的情况下，在第一时间窗内若终端的RRC层收到终端的MAC层指示的随机接入问题，终端认为不满足上述第一失败事件，第一时间窗外RRC层收到MAC层指示的随机接入问题，终端认为满足上述第一失败事件。Optionally, in some embodiments, if the terminal does not complete synchronization within the first time window (i.e., the first synchronization process is not completed), the terminal considers that the first failure event is met. For example, in the case where the first synchronization process is a synchronization process performed through a RACH process, if the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal within the first time window, the terminal considers that the above-mentioned first failure event is not met, and if the RRC layer receives a random access problem indicated by the MAC layer outside the first time window, the terminal considers that the above-mentioned first failure event is met.

可选地，上述第一时间窗可以由协议约定，或者网络侧设备配置，若由网络侧设备配置，可以通过专用信令(例如RRCReconfiguration)或者系统消息(例如SIB19)配置。Optionally, the first time window may be agreed upon by a protocol or configured by a network-side device. If configured by a network-side device, it may be configured through dedicated signaling (eg, RRCReconfiguration) or a system message (eg, SIB19).

可选地，在一些实施例中，所述第一同步过程未完成包括以下至少一项：Optionally, in some embodiments, the first synchronization process is not completed including at least one of the following:

在第一时间窗内，所述第一同步过程未完成；In the first time window, the first synchronization process is not completed;

在所述第一同步过程为通过RACH过程执行的同步过程，且终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第一预设次数的情况下，所述第一同步过程未完成；When the first synchronization process is a synchronization process performed through a RACH process, and the number of times the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a first preset number of times, the first synchronization process is not completed;

其中，所述第一时间窗为用于执行所述第一同步过程的时间窗，所述第一时间窗的起始时刻为所述第一时刻。 The first time window is a time window for executing the first synchronization process, and the starting time of the first time window is the first time.

可选地，在一些实施例中，所述第一操作包括执行第二同步过程，所述方法还包括：Optionally, in some embodiments, the first operation includes performing a second synchronization process, and the method further includes:

在所述第二同步过程未完成的情况下，所述终端执行第二操作，所述第二操作包括以下任一项：发起RRC连接重建流程；进入RRC空闲态。When the second synchronization process is not completed, the terminal performs a second operation, and the second operation includes any one of the following: initiating an RRC connection reconstruction process; entering an RRC idle state.

本申请实施例中，上述第二同步过程可以与第一同步过程的同步方式相同或不同，在此不作进一步限定。In the embodiment of the present application, the second synchronization process may be the same as or different from the synchronization method of the first synchronization process, which is not further limited herein.

可选地，在所述第二同步过程未完成的情况下，所述终端执行第二操作包括：Optionally, when the second synchronization process is not completed, the terminal performing a second operation includes:

在所述第二同步未完成的情况下，所述终端认为满足第二失败事件，所述第二失败事件包括无线链路失败或第二同步过程失败；In a case where the second synchronization is not completed, the terminal considers that a second failure event is satisfied, where the second failure event includes a radio link failure or a second synchronization process failure;

在所述终端认为满足所述第二失败事件的情况下，所述终端执行第二操作。When the terminal considers that the second failure event is satisfied, the terminal performs a second operation.

可选地，在所述第二同步未完成的情况下，所述终端认为满足第二失败事件包括以下至少一项：Optionally, when the second synchronization is not completed, the terminal considers that the second failure event is satisfied, including at least one of the following:

在所述第二同步过程为通过RACH过程执行的同步过程，且所述终端的RRC层在第二时间窗外接收到终端的MAC层指示的随机接入问题的情况下，所述终端认为第二失败事件满足；When the second synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the second time window, the terminal considers that the second failure event is satisfied;

在所述第二同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第二预设次数的情况下，所述终端认为第二失败事件满足；When the second synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a second preset number, the terminal considers that the second failure event is satisfied;

在所述第二同步过程为通过RACH-less过程执行的同步过程，且在第二时间窗内同步过程未完成的情况下，所述终端认为第二失败事件满足；When the second synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a second time window, the terminal considers that a second failure event is satisfied;

其中，所述第二时间窗为用于执行所述第二同步过程的时间窗，所述第二时间窗的起始时刻为第一时间窗的结束时刻，所述第一时间窗为用于执行所述第一同步过程的时间窗。The second time window is a time window for executing the second synchronization process, the start time of the second time window is the end time of the first time window, and the first time window is a time window for executing the first synchronization process.

可选地，所述第二同步过程未完成包括以下至少一项：Optionally, the second synchronization process is not completed including at least one of the following:

在第二时间窗内，所述第二同步过程未完成；In the second time window, the second synchronization process is not completed;

在所述第二同步过程为通过RACH过程执行的同步过程，且终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第二预设次数的情况下，所述第二同步过程未完成；When the second synchronization process is a synchronization process performed through a RACH process, and the number of times the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a second preset number of times, the second synchronization process is not completed;

其中，所述第二时间窗为用于执行所述第二同步的时间窗，所述第二时间窗的起始时刻为第一时间窗的结束时刻，所述第一时间窗为用于执行所述第一同步过程的时间窗。The second time window is a time window for executing the second synchronization, the start time of the second time window is the end time of the first time window, and the first time window is a time window for executing the first synchronization process.

可选地，上述第二时间窗的运行时长可以与第一时间窗的运行时长相同。此外，第二运行时间窗也可以复用第一运行时间窗，例如，基于第一定时器维护第一时间窗，并在第一时间窗结束的时刻(即第一定时器超时的情况下)重启第一定时器以维护第二时间窗。Optionally, the running time of the second time window may be the same as the running time of the first time window. In addition, the second running time window may also reuse the first running time window, for example, maintaining the first time window based on the first timer, and restarting the first timer to maintain the second time window when the first time window ends (i.e., when the first timer times out).

本申请实施例中，上述第二同步过程可以理解为再次执行同步过程，上述第二时间窗可以由协议约定或者网络侧设备配置。In the embodiment of the present application, the above-mentioned second synchronization process can be understood as executing the synchronization process again, and the above-mentioned second time window can be agreed upon by the protocol or configured by the network side device.

可选地，在一些实施例中，所述第一时间窗基于以下任一项确定：Optionally, in some embodiments, the first time window is determined based on any one of the following:

第一时刻和第一定时器的运行时间； The first moment and the running time of the first timer;

所述第一时刻和第一持续时间；the first moment and the first duration;

所述第一时刻和第二时刻；the first moment and the second moment;

其中，所述第二时刻位于所述第一时刻之后。The second moment is located after the first moment.

本申请实施例中，所述第一时间窗基于第一时刻和第一定时器的运行时间确定可以理解为，在第一时刻启动第一定时器，第一定时器在运行则表示当前时间在第一时间窗内，第一定时器超时或第一定时器没有运行则表示当前时间不在第一时间窗内。其中，第一定时器的运行时间可以由网络侧设备配置或者协议约定。In the embodiment of the present application, the first time window is determined based on the first moment and the running time of the first timer, which can be understood as starting the first timer at the first moment. If the first timer is running, it means that the current time is within the first time window, and if the first timer times out or the first timer is not running, it means that the current time is not within the first time window. The running time of the first timer can be configured by the network side device or agreed upon by the protocol.

可选地，所述第一时间窗基于所述第一时刻和第一持续时间确定，可以理解为，第一时间窗的起始时间为第一时刻，且第一时间窗的持续时间为第一持续时间，即第以时间窗的结束时间为第一时刻与第一持续之间之和。其中，该第一持续时间可以由协议约定或者网络侧设备指示，该第一持续时间的单位可以为秒、毫秒、微秒、帧、子帧、时隙或符号。Optionally, the first time window is determined based on the first moment and the first duration, which can be understood as that the start time of the first time window is the first moment, and the duration of the first time window is the first duration, that is, the end time of the first time window is the sum of the first moment and the first duration. The first duration can be agreed upon by the protocol or indicated by the network side device, and the unit of the first duration can be seconds, milliseconds, microseconds, frames, subframes, time slots or symbols.

可选地，所述第一时间窗基于所述第一时刻和第二时刻确定可以理解为，第一时间窗的起始时间为第一时刻，第一时间窗的结束时间为第二时刻。其中，上述第二时刻可以由网络侧设备指示。Optionally, the first time window is determined based on the first moment and the second moment, which can be understood as the start time of the first time window is the first moment and the end time of the first time window is the second moment. The second moment can be indicated by the network side device.

可选地，在一些实施例中，所述第一定时器满足以下至少一项：Optionally, in some embodiments, the first timer satisfies at least one of the following:

所述第一定时器的开启时刻为所述第一时刻；The start time of the first timer is the first time;

所述第一定时器停止的条件包括在所述第一定时器的运行期间所述终端完成同步；The condition for stopping the first timer includes that the terminal completes synchronization during the running of the first timer;

所述第一定时器超时的情况下，所述第一时间窗结束。When the first timer times out, the first time window ends.

本申请实施例中，可以在第一时刻启动上述第一定时器，第一定时器的取值(即运行时间的时间长度)的单位可以秒、毫秒、微秒、帧、子帧、时隙或符号。该第一定时器可以重用T304(通过专用信令提供)，或引入新的定时器(如专用于进行同步的定时器)。In the embodiment of the present application, the first timer can be started at the first moment, and the value of the first timer (i.e., the length of the running time) can be in seconds, milliseconds, microseconds, frames, subframes, time slots, or symbols. The first timer can reuse T304 (provided by dedicated signaling), or introduce a new timer (such as a timer dedicated to synchronization).

可选地，在第一定时器运行期间，若终端完成同步，终端停止第一定时器。Optionally, during the running of the first timer, if the terminal completes synchronization, the terminal stops the first timer.

可选地，所述第一定时器超时的情况下，所述第一时间窗结束，可以理解为以下任一项：Optionally, when the first timer times out, the first time window ends, which can be understood as any one of the following:

在第一定时器超时，终端没有完成同步，终端执行第一操作；When the first timer times out and the terminal has not completed synchronization, the terminal performs a first operation;

在第一定时器超时，终端没有完成同步，终端认为满足第一失败事件，在所述终端认为满足所述第一失败事件的情况下，所述终端执行所述第一操作。When the first timer times out and the terminal has not completed synchronization, the terminal considers that a first failure event is satisfied. In the case where the terminal considers that the first failure event is satisfied, the terminal performs the first operation.

可选地，在一些实施例中，所述第二时间窗基于如下任一项确定：Optionally, in some embodiments, the second time window is determined based on any one of the following:

第三时刻和第二定时器的运行时间；The third moment and the running time of the second timer;

第三时刻和第二持续时间；the third moment and the second duration;

第三时刻和第四时刻；The third and fourth moments;

其中，所述第三时刻为所述第一时间窗的结束时刻，所述第四时刻位于所述第三时刻之后。The third moment is the end moment of the first time window, and the fourth moment is after the third moment.

本申请实施例中，所述第二时间窗基于第三时刻和第二定时器的运行时间确定可以理解为，在第三时刻启动第二定时器，第二定时器在运行表示当前时间在第二时间窗内，第二定时器超时或没有运行表示当前时间不在第二时间窗内。其中，第二定时器的运行时间可以由网络侧设备配置或者协议约定。In the embodiment of the present application, the second time window is determined based on the third moment and the running time of the second timer, which can be understood as starting the second timer at the third moment, and the second timer is running, indicating that the current time is within the second time window, and the second timer is running. The timeout or non-operation of the second timer indicates that the current time is not within the second time window. The operation time of the second timer can be configured by the network side device or agreed upon by the protocol.

可选地，所述第二时间窗基于所述第三时刻和第二持续时间确定，可以理解为，第三时刻为第二时间窗的起始时间，且第二时间窗的持续时间为第二持续时间，即第二时间窗的结束时间为第三时刻与第二持续之间之和。其中，该第二持续时间可以由协议约定或者网络侧设备指示，该第二持续时间的单位可以为秒、毫秒、微秒、帧、子帧、时隙或符号。Optionally, the second time window is determined based on the third moment and the second duration, which can be understood as the third moment being the start time of the second time window, and the duration of the second time window being the second duration, that is, the end time of the second time window being the sum of the third moment and the second duration. The second duration can be agreed upon by a protocol or indicated by a network-side device, and the unit of the second duration can be seconds, milliseconds, microseconds, frames, subframes, time slots, or symbols.

可选地，所述第二时间窗基于所述第三时刻和第四时刻确定可以理解为，第三时刻为第二时间窗的起始时间，第四时刻为第二时间窗的结束时间。其中，上述第四时刻可以由网络侧设备指示。Optionally, the second time window is determined based on the third moment and the fourth moment, which can be understood as the third moment being the start time of the second time window and the fourth moment being the end time of the second time window. The fourth moment can be indicated by the network side device.

可选地，上述第一时刻、第二时刻、第三时刻、第四时刻可以为绝对时间(例如世界协调时间(Universal Time Coordinated，UTC))或相对时间(例如系统帧号、子帧号等)。Optionally, the first moment, the second moment, the third moment, and the fourth moment may be absolute time (such as Universal Time Coordinated (UTC)) or relative time (such as system frame number, subframe number, etc.).

可选地，在一些实施例中，在满足第一条件的情况下，所述第一操作包括执行第二同步过程；和/或，Optionally, in some embodiments, when the first condition is met, the first operation includes executing a second synchronization process; and/or,

在不满足第一条件的情况下，所述第一操作包括发起RRC连接重建流程或进入RRC空闲态。When the first condition is not met, the first operation includes initiating an RRC connection reestablishment procedure or entering an RRC idle state.

可选地，所述第一条件包括以下至少一项：Optionally, the first condition includes at least one of the following:

终端测量的第一小区的第一信号强度大于或等于第一阈值；A first signal strength of the first cell measured by the terminal is greater than or equal to a first threshold;

终端测量的第一小区的第一信号质量大于或等于第二阈值；The first signal quality of the first cell measured by the terminal is greater than or equal to the second threshold;

终端的位置与第一小区的第一参考位置的距离小于或等于第三阈值；The distance between the position of the terminal and the first reference position of the first cell is less than or equal to a third threshold;

其中，所述第一小区为用于执行所述第一同步过程的小区。The first cell is a cell used to perform the first synchronization process.

本申请实施例中，终端执行第一同步过程可以理解为，终端在第一小区执行第一同步过程。上述第一信号强度可以包括测量的参考信号接收功率(Reference Signal Received Power，RSRP)、信干噪比(signal-to-noise and interference ratio，SINR)和信噪比(Signal Noise Ratio，SNR)中的至少一项，上述信号质量可以理解为参考信号接收质量(Reference Signal Received Quality，RSRQ)。In the embodiment of the present application, the terminal performing the first synchronization process can be understood as the terminal performing the first synchronization process in the first cell. The above-mentioned first signal strength may include at least one of the measured reference signal received power (Reference Signal Received Power, RSRP), signal-to-noise and interference ratio (signal-to-noise and interference ratio, SINR) and signal-to-noise ratio (Signal Noise Ratio, SNR), and the above-mentioned signal quality can be understood as reference signal received quality (Reference Signal Received Quality, RSRQ).

可选地，终端测量的服务小区的第一信号强度可以是在第一波束或第一BWP上测量的信号强度，其中第一波束的具体形式可以是同步信号块(Synchronization Signal Block，SSB)或信道状态信息参考信号(Channel State Information Reference Signal，CSI-RS)，第一波束或第一BWP可以为终端选择的波束或BWP。Optionally, the first signal strength of the service cell measured by the terminal may be a signal strength measured on a first beam or a first BWP, where a specific form of the first beam may be a synchronization signal block (Synchronization Signal Block, SSB) or a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), and the first beam or the first BWP may be a beam or BWP selected by the terminal.

可选地，在一些实施例中，所述方法还包括：Optionally, in some embodiments, the method further comprises:

所述终端在第时刻获取第一测量结果，所述第一测量结果包括所述第一信号强度、所述第一信号质量和所述第一参考位置中的至少一项。The terminal obtains a first measurement result at a first moment, where the first measurement result includes at least one of the first signal strength, the first signal quality, and the first reference position.

可选地，在一些实施例中，所述发起RRC连接重建流程之后，所述方法还包括：Optionally, in some embodiments, after initiating the RRC connection reestablishment process, the method further includes:

终端选择第二小区；The terminal selects the second cell;

在所述第二小区与第一小区为不同小区的情况下，所述终端向所述第二小区发送RRC 重建请求消息；其中，所述第一小区为用于执行所述第一同步过程的小区。In the case where the second cell and the first cell are different cells, the terminal sends an RRC Reconstruction request message; wherein, the first cell is a cell used to perform the first synchronization process.

可选地，所述方法还包括：Optionally, the method further comprises:

在所述第二小区与所述第一小区为相同小区的情况下，所述终端执行第三同步过程；In a case where the second cell and the first cell are the same cell, the terminal performs a third synchronization process;

其中，所述第三同步过程包括时间同步过程和频率同步过程中的至少一者。The third synchronization process includes at least one of a time synchronization process and a frequency synchronization process.

应理解，本申请实施例中，上述第三同步过程可以与上述第一同步过程相同或不同。It should be understood that in the embodiment of the present application, the third synchronization process mentioned above may be the same as or different from the first synchronization process mentioned above.

在所述第三同步过程未完成的情况下，所述终端执行第三操作，所述第三操作包括以下至少一项：If the third synchronization process is not completed, the terminal performs a third operation, where the third operation includes at least one of the following:

发起连接重建流程；Initiate the connection reestablishment process;

进入RRC空闲态。Enter RRC idle state.

可选地，在所述第三同步过程未完成的情况下，所述终端执行第三操作包括：Optionally, when the third synchronization process is not completed, the terminal performing a third operation includes:

在所述第三同步未完成的情况下，所述终端认为满足第三失败事件，所述第三失败事件包括无线链路失败或第三同步过程失败；In a case where the third synchronization is not completed, the terminal considers that a third failure event is satisfied, where the third failure event includes a radio link failure or a third synchronization process failure;

在所述终端认为满足所述第三失败事件的情况下，所述终端执行第三操作。When the terminal determines that the third failure event is satisfied, the terminal performs a third operation.

可选地，在所述第三同步未完成的情况下，所述终端认为满足第三失败事件包括以下至少一项：Optionally, when the third synchronization is not completed, the terminal considers that the third failure event is satisfied, including at least one of the following:

在所述第三同步过程为通过RACH过程执行的同步过程，且所述终端的RRC层在第三时间窗外接收到终端的MAC层指示的随机接入问题的情况下，所述终端认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the third time window, the terminal considers that a third failure event is satisfied;

在所述第三同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第三预设次数的情况下，所述终端认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number, the terminal considers that a third failure event is satisfied;

在所述第三同步过程为通过RACH-less过程执行的同步过程，且在第三时间窗内同步过程未完成的情况下，所述终端认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a third time window, the terminal considers that a third failure event is satisfied;

其中，所述第三时间窗为用于执行所述第三同步过程的时间窗。The third time window is a time window for executing the third synchronization process.

可选地，所述第三同步过程未完成包括以下至少一项：Optionally, the third synchronization process is not completed including at least one of the following:

在第三时间窗内，所述第三同步过程未完成；In the third time window, the third synchronization process is not completed;

在所述第三同步过程为通过RACH过程执行的同步过程，且终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第三预设次数的情况下，所述第三同步过程未完成；In a case where the third synchronization process is a synchronization process performed through a RACH process, and the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number of times, the third synchronization process is not completed;

其中，所述第三时间窗为用于执行所述第三同步的时间窗。The third time window is a time window used to perform the third synchronization.

可选地，所述第三时间窗基于如下任一项确定：Optionally, the third time window is determined based on any one of the following:

第五时刻和第三定时器的运行时间；The fifth moment and the running time of the third timer;

第五时刻和第三持续时间；fifth moment and third duration;

第五时刻和第六时刻； The fifth and sixth moments;

其中，所述第五时刻为确定所述第二小区与所述第一小区为相同小区的时刻、或者为第一时间窗的结束时刻、或者为发起RRC连接重建流程的时刻，所述第一时间窗为用于执行所述第一同步过程的时间窗，所述第六时刻位于所述第五时刻之后。Among them, the fifth moment is the moment when it is determined that the second cell and the first cell are the same cell, or the end time of the first time window, or the moment when the RRC connection reconstruction process is initiated, the first time window is the time window for executing the first synchronization process, and the sixth moment is after the fifth moment.

本申请实施例中，所述第三时间窗基于第五时刻和第三定时器的运行时间确定可以理解为，在第五时刻启动第三定时器，第三定时器正在运行表示当前时间在第三时间窗内，第三定时器超时或者没有运行表示当前时间不在第三时间窗内。其中，第三定时器的运行时间可以由网络侧设备配置或者协议约定。In the embodiment of the present application, the third time window is determined based on the fifth moment and the running time of the third timer, which can be understood as starting the third timer at the fifth moment, the third timer is running, indicating that the current time is within the third time window, and the third timer is timed out or not running, indicating that the current time is not within the third time window. The running time of the third timer can be configured by the network side device or agreed upon by the protocol.

可选地，所述第三时间窗基于所述第五时刻和第三持续时间确定，可以理解为，第五时刻为第三时间窗的起始时间，且第三时间窗的持续时间为第三持续时间，即第三时间窗的结束时间为第五时刻与第三持续之间之和。其中，该第三持续时间可以由协议约定或者网络侧设备指示，该第三持续时间的单位可以为秒、毫秒、微秒、帧、子帧、时隙或符号。Optionally, the third time window is determined based on the fifth moment and the third duration, which can be understood as follows: the fifth moment is the start time of the third time window, and the duration of the third time window is the third duration, that is, the end time of the third time window is the sum of the fifth moment and the third duration. The third duration can be agreed upon by a protocol or indicated by a network-side device, and the unit of the third duration can be seconds, milliseconds, microseconds, frames, subframes, time slots, or symbols.

可选地，所述第三时间窗基于所述第五时刻和第六时刻确定可以理解为，第五时刻为第三时间窗的起始时间，第六时刻为第二时间窗的结束时间。其中，上述第五时刻可以由网络侧设备指示。Optionally, the third time window is determined based on the fifth and sixth moments, which can be understood as the fifth moment being the start time of the third time window and the sixth moment being the end time of the second time window. The fifth moment can be indicated by a network side device.

可选地，上述第五时刻、第六时刻可以为绝对时间(例如世界协调时间(Universal Time Coordinated，UTC))或相对时间(例如系统帧号、子帧号等)。Optionally, the fifth moment and the sixth moment may be absolute time (such as Universal Time Coordinated, UTC) or relative time (such as system frame number, subframe number, etc.).

需要说明的是，第一时间窗的结束时刻可以理解为第一时间窗的结束时间点对应的时刻，也可以理解为第一时间窗的结束时间点所在的时间单元的结束时刻。上述发起RRC连接重建流程的时刻可以理解为发起RRC连接重建流程的开始时间点对应的时刻，也可以理解为发起RRC连接重建流程的开始时间点所在的时间单元的结束时刻。确定所述第二小区与执行所述第一同步过程的小区为相同小区的时刻可以理解为确定所述第二小区与执行所述第一同步过程的小区为相同小区时间点对应的时刻，也可以理解为确定所述第二小区与执行所述第一同步过程的小区为相同小区时间点所在的时间单元的结束时刻。It should be noted that the end time of the first time window can be understood as the moment corresponding to the end time point of the first time window, and can also be understood as the end time of the time unit where the end time point of the first time window is located. The above-mentioned moment of initiating the RRC connection reconstruction process can be understood as the moment corresponding to the start time point of initiating the RRC connection reconstruction process, and can also be understood as the end time of the time unit where the start time point of initiating the RRC connection reconstruction process is located. The moment of determining that the second cell is the same cell as the cell performing the first synchronization process can be understood as the moment corresponding to the time point of determining that the second cell is the same cell as the cell performing the first synchronization process, and can also be understood as the end time of the time unit where the time point of determining that the second cell is the same cell as the cell performing the first synchronization process is located.

终端基于第一指示信息或第二条件确定所述第一同步过程的同步方式；The terminal determines the synchronization mode of the first synchronization process based on the first indication information or the second condition;

其中，所述第一指示信息用于指示终端通过RACH过程执行所述第一同步过程或通过RACH-less过程执行所述第一同步过程；所述第二条件包括以下至少一项：终端测量的第一小区的第二信号强度大于或等于第一阈值；终端测量的第一小区的第二信号质量大于或等于第二阈值；终端的位置与第一小区的第二参考位置的距离小于或等于第三阈值。Among them, the first indication information is used to instruct the terminal to perform the first synchronization process through the RACH process or to perform the first synchronization process through the RACH-less process; the second condition includes at least one of the following: the second signal strength of the first cell measured by the terminal is greater than or equal to the first threshold; the second signal quality of the first cell measured by the terminal is greater than or equal to the second threshold; the distance between the terminal's position and the second reference position of the first cell is less than or equal to a third threshold.

所述终端在所述第一时刻获取第二测量结果，所述第二测量结果包括所述第二信号强度、所述第二信号质量和所述第二参考位置中的至少一项。The terminal obtains a second measurement result at the first moment, where the second measurement result includes at least one of the second signal strength, the second signal quality, and the second reference position.

本申请实施例中，上述第一指示信息可以指示以下任一项：In the embodiment of the present application, the first indication information may indicate any of the following:

终端在第一时刻用RACH-less的方式进行同步；The terminal synchronizes using RACH-less mode at the first moment;

终端在第一时刻用RACH的方式进行同步。 The terminal performs synchronization by means of RACH at the first moment.

可选地，上述第一指示信息可以通过以下任一项承载：Optionally, the first indication information may be carried by any of the following:

媒体接入控制控制单元(Medium Access Control Control Element，MAC CE)，该MAC CE可以是设计的新的MAC CE，用于包括第一指示信息，可以使用预留index＝35—46中的一个值作为逻辑信道标识(Logical Channel Identification，LCID)来定义此MAC CE用于指示终端在第一时刻用RACH-less的方式执行同步；该MAC CE的内容可以为空，或者包括1比特指示，或者UE可以忽略该MAC CE的内容(即只要收到该MAC CE就认为网络指示终端在第一时刻用RACH-less的方式执行同步)；a Medium Access Control Control Element (MAC CE), the MAC CE may be a newly designed MAC CE, used to include first indication information, and may use a value in reserved index = 35-46 as a Logical Channel Identification (LCID) to define this MAC CE to indicate that the terminal performs synchronization in a RACH-less manner at the first moment; the content of the MAC CE may be empty, or include a 1-bit indication, or the UE may ignore the content of the MAC CE (i.e., as long as the MAC CE is received, it is considered that the network indicates that the terminal performs synchronization in a RACH-less manner at the first moment);

下行控制信息(Downlink Control Information，DCI)；Downlink Control Information (DCI);

广播消息(例如SIB19)，可以用1比特表示第一指示信息，例如该比特存在且取值为true时，表示指示终端在第一时刻用RACH-less的方式执行同步，否则终端通过RACH过程执行同步；再例如，该比特取值为1时，表示终端在第一时刻用RACH-less的方式执行，取值为0时，表示指示终端在第一时刻用RACH的方式执行同步。A broadcast message (such as SIB19) may use 1 bit to represent the first indication information. For example, when the bit exists and takes a value of true, it indicates that the terminal is instructed to perform synchronization in a RACH-less manner at the first moment, otherwise the terminal performs synchronization through the RACH process. For another example, when the value of the bit is 1, it indicates that the terminal is executed in a RACH-less manner at the first moment, and when the value is 0, it indicates that the terminal is instructed to perform synchronization in a RACH manner at the first moment.

专用信令。Dedicated signaling.

可选地，在一些实施例中，终端在第一时刻执行第一同步过程包括以下任一项：Optionally, in some embodiments, the terminal performing the first synchronization process at the first moment includes any of the following:

在终端从网络侧设备接收到第一指示信息，且所述第一指示信息指示所述终端通过RACH过程执行第一同步过程的情况下，所述终端在第一时刻通过RACH过程执行第一同步过程；When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs a first synchronization process through a RACH process, the terminal performs the first synchronization process through the RACH process at a first moment;

在终端从网络侧设备接收到第一指示信息，且所述第一指示信息指示所述终端通过RACH-less过程执行第一同步过程的情况下，所述终端在第一时刻通过RACH-less过程执行第一同步过程；When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs the first synchronization process through the RACH-less process, the terminal performs the first synchronization process through the RACH-less process at a first moment;

在终端尚未接收到网络侧设备发送的第一指示信息的情况下，所述终端在第一时刻通过RACH过程执行第一同步过程；In a case where the terminal has not yet received the first indication information sent by the network side device, the terminal performs a first synchronization process through a RACH process at a first moment;

在满足所述第二条件的情况下，所述终端在第一时刻通过RACH-less过程执行第一同步过程；When the second condition is met, the terminal performs a first synchronization process through a RACH-less process at a first moment;

在不满足所述第二条件的情况下，所述终端在第一时刻通过RACH过程执行第一同步过程。When the second condition is not met, the terminal performs a first synchronization process through a RACH process at a first moment.

可选地，在一些实施例中，在终端基于第二条件确定所述第一同步过程的同步方式的情况下，所述方法还包括：Optionally, in some embodiments, when the terminal determines the synchronization mode of the first synchronization process based on the second condition, the method further includes:

所述终端向网络侧设备发送第二指示信息，所述第二指示信息用于指示所述第一同步过程的同步方式。The terminal sends second indication information to the network side device, where the second indication information is used to indicate a synchronization mode of the first synchronization process.

本申请实施例中，上述第二指示信息可以通过专用信令、MAC CE或上行控制信息(Uplink Control Information，UCI)承载。In an embodiment of the present application, the above-mentioned second indication information can be carried through dedicated signaling, MAC CE or uplink control information (Uplink Control Information, UCI).

可选地，在一些实施例中，通过RACH过程执行的同步过程包括：发起RACH过程；发起定时提前上报流程。Optionally, in some embodiments, the synchronization process performed through the RACH process includes: initiating the RACH process; initiating a timing advance reporting process.

可选地，通过RACH-less过程执行的同步过程包括： Optionally, the synchronization process performed through the RACH-less process includes:

获取目标上行调度以及触发定时提前上报流程；Obtain target uplink scheduling and trigger the timing advance reporting process;

基于所述目标上行调度发送定时提前报告。A timing advance report is sent based on the target uplink scheduling.

可选地，上述目标上行调度的获取方式包括以下至少一项：Optionally, the method for acquiring the target uplink scheduling includes at least one of the following:

通过专用信令获取；Acquired through dedicated signaling;

在没有通过专用信令获取，或者通过专用信令没有获取到目标上行调度的情况下，终端监听小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)加扰的物理下行控制信道(Physical downlink control channel，PDCCH)。When not obtaining through dedicated signaling, or not obtaining the target uplink scheduling through dedicated signaling, the terminal monitors the physical downlink control channel (PDCCH) scrambled by the Cell Radio Network Temporary Identifier (C-RNTI).

可选地，上述目标上行调度可以为与第二波束或第二BWP关联的上行调度。上述第二波束或第二BWP为终端选择的波束或BWP，或者为网络侧设备指示的波束或BWP。Optionally, the target uplink scheduling may be an uplink scheduling associated with a second beam or a second BWP. The second beam or the second BWP is a beam or a BWP selected by the terminal, or a beam or a BWP indicated by a network-side device.

所述终端从网络侧设备接收第一信息，所述第一信息用于确定所述第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；The terminal receives first information from a network side device, where the first information is used to determine the first time; the first information includes any one of the following: time information indicated by dedicated signaling or system message; third indication information and information used to indicate when the serving cell stops serving;

本申请实施例中，在接收到上述第三指示信息的情况下，终端可以认为t-service为所述第一时刻，所述t-service用于指示服务小区何时停止服务的信息。上述目标卫星可以理解为在进行服务链路切换后，为终端提供服务的卫星。In the embodiment of the present application, when receiving the third indication information, the terminal may consider t-service to be the first moment, and the t-service is used to indicate when the serving cell stops serving. The target satellite may be understood as a satellite that provides service to the terminal after the service link switching is performed.

可选地，在一些实施例中，可以通过SIB19承载上述时间信息。Optionally, in some embodiments, the above time information may be carried via SIB19.

在第一时刻之前，所述终端通过系统消息(例如SIB19)获取第二信息，所述第二信息包括接入目标卫星所需要的卫星辅助信息；Before the first moment, the terminal obtains second information through a system message (such as SIB19), where the second information includes satellite assistance information required for accessing a target satellite;

所述终端在第一时刻执行第一同步过程包括：所述终端基于所述第二信息在第一时刻执行第一同步过程；The terminal performing a first synchronization process at a first moment includes: the terminal performing a first synchronization process at a first moment based on the second information;

其中，所述终端获取第二信息的方式包括以下任一项：The method for the terminal to obtain the second information includes any one of the following:

终端认为系统消息包含的目标列表中，第一元素包括的卫星辅助信息为所述第二信息，所述第一元素中指示的载波频率和服务小区的载波频率相同，且所述第一元素中指示的PCI与所述服务小区的PCI相同；The terminal considers that in the target list included in the system message, the satellite auxiliary information included in the first element is the second information, the carrier frequency indicated in the first element is the same as the carrier frequency of the serving cell, and the PCI indicated in the first element is the same as the PCI of the serving cell;

终端基于网络侧设备发送的第四指示信息确定系统消息包含的目标列表中，第二元素包括的卫星辅助信息为所述第二信息；The terminal determines, based on the fourth indication information sent by the network side device, that in the target list included in the system message, the satellite auxiliary information included in the second element is the second information;

终端将系统消息中目标域包含的卫星辅助信息确定为所述第二信息；The terminal determines the satellite assistance information included in the target field in the system message as the second information;

其中，所述目标列表为包括邻小区的卫星辅助信息的列表。 The target list is a list including satellite auxiliary information of neighboring cells.

本申请实施例中，上述目标域可以理解为新定义的域，用于包括上述第二信息。In the embodiment of the present application, the above-mentioned target domain can be understood as a newly defined domain, which is used to include the above-mentioned second information.

可选地，在一些实施例中，可以在第一时刻终端认为失步，通过SIB19获取第二信息；Optionally, in some embodiments, the terminal may consider that the synchronization is lost at the first moment, and obtain the second information through SIB19;

可选地，在一些实施例中，可以在通过专用信令获取第二信息，即网络侧设备在第一时刻之前，通过专用信令发送第二信息。Optionally, in some embodiments, the second information may be acquired through dedicated signaling, that is, the network side device sends the second information through dedicated signaling before the first moment.

可选地，上述目标列表可以包括第一列表或第二列表，其中第一列表可以理解为邻区配置列表(ntn-NeighCellConfigList)，上述第二列表可以理解为邻区配置扩展列表(ntn-NeighCellConfigListExt)。Optionally, the above-mentioned target list may include a first list or a second list, wherein the first list may be understood as a neighbor cell configuration list (ntn-NeighCellConfigList), and the above-mentioned second list may be understood as a neighbor cell configuration extension list (ntn-NeighCellConfigListExt).

可选地，在一些实施例中，所述第二信息包括如下至少之一：Optionally, in some embodiments, the second information includes at least one of the following:

目标卫星的星历信息；ephemeris information of the target satellite;

定时提前(Timed advance，TA)参数，包括终端计算通用(common)TA所需的信息；Timing advance (TA) parameters, including information required by the terminal to calculate the common TA;

K_mac，表示在下行链路和上行链路帧时间在基站上不对齐的情况下，网络提供的调度偏移；K_mac, represents the scheduling offset provided by the network when the downlink and uplink frame times are not aligned at the base station;

epochTime；epochTime;

ntn-UlSyncValidityDuration，表示从epochTime开始，在不获取新的目标卫星的卫星辅助信息的情况下，终端能应用所述目标卫星的卫星辅助信息的最长时间；ntn-UlSyncValidityDuration, which indicates the maximum time, starting from epochTime, that the terminal can apply the satellite assistance information of the target satellite without acquiring the satellite assistance information of the new target satellite;

上行链路的极化方向，取值为左极化、右极化或圆极化；The polarization direction of the uplink can be left polarization, right polarization or circular polarization;

下行链路的极化方向，取值为左极化、右极化或圆极化；The polarization direction of the downlink can be left polarization, right polarization or circular polarization;

目标参考位置，所述目标参考位置为服务小区的参考位置，更进一步地，所述目标参考位置为第一时刻时/第一时刻后的服务小区的参考位置。The target reference position is a reference position of a serving cell. Furthermore, the target reference position is a reference position of a serving cell at a first moment/after a first moment.

可选地，在一些实施例中，所述第四指示信息包括以下任一项：Optionally, in some embodiments, the fourth indication information includes any one of the following:

索引值，所述索引值用于指示所述第二元素的位置；An index value, where the index value is used to indicate a position of the second element;

载波频率和PCI；Carrier frequency and PCI;

卫星标识。Satellite identification.

可选地，所述索引值可以是一维的，取值0-7或者1-8，以0-7为例，索引值0-3与第一列表(ntn-NeighCellConfigList)中的元素一一对应，索引值4-7与第二列表(ntn-NeighCellConfigListExt)中的元素一一对应。Optionally, the index value can be one-dimensional, taking a value of 0-7 or 1-8. Taking 0-7 as an example, index values 0-3 correspond one-to-one to the elements in the first list (ntn-NeighCellConfigList), and index values 4-7 correspond one-to-one to the elements in the second list (ntn-NeighCellConfigListExt).

可选地，所述索引值也可以是二维的，第一维取值为0-1或者1-2，第二维取值为0-3或者1-4，以前者为例，(0，3)表示第二元素为第一列表中的第4个元素。Optionally, the index value may also be two-dimensional, with the first dimension taking values of 0-1 or 1-2, and the second dimension taking values of 0-3 or 1-4. Taking the former as an example, (0, 3) indicates that the second element is the 4th element in the first list.

可选地，若上述第四指示信息包括载波频率和PCI与第二元素中所包含的载波频率和PCI相同，终端认为第二元素中包括的卫星辅助信息为所述第二信息，所述第二元素为第一列表(ntn-NeighCellConfigList)或第二列表(ntn-NeighCellConfigListExt)中的元素。Optionally, if the above-mentioned fourth indication information includes a carrier frequency and PCI that are the same as the carrier frequency and PCI contained in the second element, the terminal considers that the satellite auxiliary information included in the second element is the second information, and the second element is an element in the first list (ntn-NeighCellConfigList) or the second list (ntn-NeighCellConfigListExt).

可选地，上述卫星标识与第一列表(ntn-NeighCellConfigList)和第二列表(ntn-NeighCellConfigListExt)中的卫星辅助信息对应，具体的，第一列表和第二列表中的每个非空元素对应一个卫星标识。Optionally, the satellite identifier corresponds to the satellite auxiliary information in the first list (ntn-NeighCellConfigList) and the second list (ntn-NeighCellConfigListExt). Specifically, each non-empty element in the first list and the second list corresponds to a satellite identifier.

参照图5，本申请还提供了一种同步处理方法，包括： Referring to FIG. 5 , the present application also provides a synchronization processing method, including:

步骤501，网络侧设备向终端发送第一信息，所述第一信息用于确定终端执行第一同步过程的第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；Step 501: The network side device sends first information to the terminal, where the first information is used to determine the first moment at which the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or system message; third indication information and information used to indicate when the serving cell stops serving;

可选地，所述方法还包括：Optionally, the method further comprises:

在所述第一时刻之前，所述网络侧设备发送系统消息，所述系统消息用于确定第二信息，所述第二信息包括接入目标卫星所需要的卫星辅助信息；Before the first moment, the network side device sends a system message, where the system message is used to determine second information, where the second information includes satellite auxiliary information required for accessing a target satellite;

其中，所述系统消息包含的目标列表中，第一元素包括的卫星辅助信息为所述第二信息，所述第一元素中指示的载波频率和服务小区的载波频率相同，且所述第一元素中指示的PCI与所述服务小区的PCI相同；In the target list included in the system message, the satellite assistance information included in the first element is the second information, the carrier frequency indicated in the first element is the same as the carrier frequency of the serving cell, and the PCI indicated in the first element is the same as the PCI of the serving cell;

所述系统消息包含的目标列表中，第二元素包括的卫星辅助信息为所述第二信息，所述第二元素由所述网络侧设备发送的第四指示信息确定；In the target list included in the system message, the satellite auxiliary information included in the second element is the second information, and the second element is determined by the fourth indication information sent by the network side device;

所述系统消息中目标域包含的卫星辅助信息为所述第二信息。The satellite assistance information included in the target field in the system message is the second information.

可选地，所述第四指示信息包括以下任一项：Optionally, the fourth indication information includes any one of the following:

载波频率和PCI；Carrier frequency and PCI;

卫星标识。Satellite identification.

可选地，所述方法还包括：Optionally, the method further comprises:

所述网络侧设备向终端发送第一指示信息，所述第一指示信息用于指示终端通过RACH过程执行第一同步过程或通过RACH-less过程执行第一同步过程。The network side device sends first indication information to the terminal, where the first indication information is used to instruct the terminal to perform the first synchronization process through a RACH process or to perform the first synchronization process through a RACH-less process.

本申请实施例提供的同步过程的失败处理方法，执行主体可以为同步过程的失败处理装置。本申请实施例中以同步过程的失败处理装置执行同步过程的失败处理方法为例，说明本申请实施例提供的同步过程的失败处理装置。The synchronization process failure processing method provided in the embodiment of the present application can be executed by a synchronization process failure processing device. The synchronization process failure processing method is executed by a synchronization process failure processing device as an example to illustrate the synchronization process failure processing device provided in the embodiment of the present application.

参照图6，本申请实施例还体用了一种同步过程的失败处理装置，如图6所示，该同步过程的失败处理装置600包括：6 , the embodiment of the present application also embodies a failure processing device for a synchronization process. As shown in FIG6 , the failure processing device 600 for the synchronization process includes:

第一执行模块601，用于在第一时刻执行第一同步过程；A first execution module 601, configured to execute a first synchronization process at a first moment;

第二执行模块602，在所述第一同步过程未完成的情况下，终端执行第一操作；A second execution module 602, when the first synchronization process is not completed, the terminal executes a first operation;

执行第二同步过程；executing a second synchronization process;

进入RRC空闲态； Enter RRC idle state;

可选地，所述第一同步过程和所述第二同步过程中的至少一者满足一下任意一项：Optionally, at least one of the first synchronization process and the second synchronization process satisfies any one of the following:

通过随机接入信道RACH过程执行的同步过程；A synchronization process performed through a random access channel RACH process;

可选地，所述第二执行模块602具体用于执行以下操作：Optionally, the second execution module 602 is specifically configured to perform the following operations:

在所述第一同步过程未完成的情况下，认为满足第一失败事件，所述第一失败事件包括无线链路失败或第一同步过程失败；In the case where the first synchronization process is not completed, it is considered that a first failure event is satisfied, where the first failure event includes a radio link failure or a first synchronization process failure;

在认为满足所述第一失败事件的情况下，执行所述第一操作。In a case where it is considered that the first failure event is satisfied, the first operation is performed.

可选地，所述第二执行模块602具体用于执行以下至少一项：Optionally, the second execution module 602 is specifically configured to execute at least one of the following:

在所述第一同步过程为通过RACH过程执行的同步过程，且终端的RRC层在第一时间窗外接收到终端的MAC层指示的随机接入问题的情况下，认为满足第一失败事件；When the first synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the first time window, it is considered that the first failure event is met;

在所述第一同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第一预设次数的情况下，认为满足第一失败事件；When the first synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a first preset number, it is considered that the first failure event is met;

在所述第一同步过程为通过RACH-less过程执行的同步过程，且在第一时间窗内同步过程未完成的情况下，认为满足第一失败事件；When the first synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a first time window, it is considered that a first failure event is satisfied;

可选地，所述第一同步过程未完成包括以下至少一项：Optionally, the first synchronization process is not completed including at least one of the following:

其中，所述第一时间窗为用于执行所述第一同步过程的时间窗，所述第一时间窗的起始时刻为所述第一时刻。The first time window is a time window for executing the first synchronization process, and the starting time of the first time window is the first time.

可选地，所述第一操作包括执行第二同步过程，所述第二执行模块602还用于：在所述第二同步过程未完成的情况下，执行第二操作，所述第二操作包括以下任一项：发起RRC连接重建流程；进入RRC空闲态。Optionally, the first operation includes executing a second synchronization process, and the second execution module 602 is further used to: when the second synchronization process is not completed, execute a second operation, and the second operation includes any one of the following: initiating an RRC connection reconstruction process; entering an RRC idle state.

可选地，所述第二执行模块602具体用于：Optionally, the second execution module 602 is specifically configured to:

在所述第二同步未完成的情况下，认为满足第二失败事件，所述第二失败事件包括无线链路失败或第二同步过程失败；If the second synchronization is not completed, it is considered that a second failure event is satisfied, where the second failure event includes a radio link failure or a second synchronization process failure;

在认为满足所述第二失败事件的情况下，执行第二操作。In the case where the second failure event is considered to be satisfied, a second operation is performed.

在所述第二同步过程为通过RACH过程执行的同步过程，且所述终端的RRC层在第二时间窗外接收到终端的MAC层指示的随机接入问题的情况下，认为满足第二失败事件； When the second synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the second time window, it is considered that the second failure event is met;

在所述第二同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第二预设次数的情况下，认为满足第二失败事件；When the second synchronization process is a synchronization process performed through a RACH process, and the number of times the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a second preset number of times, it is considered that the second failure event is met;

在所述第二同步过程为通过RACH-less过程执行的同步过程，且在第二时间窗内同步过程未完成的情况下，认为满足第二失败事件；When the second synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a second time window, it is considered that a second failure event is satisfied;

可选地，所述第一时间窗基于以下任一项确定：Optionally, the first time window is determined based on any one of the following:

第一时刻和第一定时器的运行时间；The first moment and the running time of the first timer;

所述第一时刻和第二时刻；the first moment and the second moment;

可选地，所述第一定时器满足以下至少一项：Optionally, the first timer satisfies at least one of the following:

可选地，所述第二时间窗基于如下任一项确定：Optionally, the second time window is determined based on any one of the following:

第三时刻和第二持续时间；the third moment and the second duration;

第三时刻和第四时刻；The third and fourth moments;

可选地，在满足第一条件的情况下，所述第一操作包括执行第二同步过程；和/或，Optionally, when the first condition is met, the first operation includes executing a second synchronization process; and/or,

终端测量的第一小区的第一信号质量大于或等于第二阈值； The first signal quality of the first cell measured by the terminal is greater than or equal to the second threshold;

可选地，所述同步过程的失败处理装置600还包括：Optionally, the failure handling device 600 of the synchronization process further includes:

测量模块，用于在第三时刻获取第一测量结果，所述第一测量结果包括所述第一信号强度、所述第一信号质量和所述第一参考位置中的至少一项。The measurement module is used to obtain a first measurement result at a third moment, where the first measurement result includes at least one of the first signal strength, the first signal quality and the first reference position.

选择模块，用于选择第二小区；A selection module, used for selecting a second cell;

第二发送模块，用于在所述第二小区与第一小区为不同小区的情况下，向所述第二小区发送RRC重建请求消息。其中，所述第一小区为用于执行所述第一同步过程的小区。The second sending module is configured to send an RRC reestablishment request message to the second cell when the second cell is different from the first cell. The first cell is a cell used to perform the first synchronization process.

可选地，所述第二执行模块602还用于：Optionally, the second execution module 602 is further configured to:

在所述第二小区与所述第一小区为相同小区的情况下，执行第三同步过程；When the second cell and the first cell are the same cell, performing a third synchronization process;

在所述第三同步过程未完成的情况下，执行第三操作，所述第三操作包括以下至少一项：If the third synchronization process is not completed, performing a third operation, wherein the third operation includes at least one of the following:

发起连接重建流程；Initiate the connection reestablishment process;

进入RRC空闲态。Enter RRC idle state.

在所述第三同步未完成的情况下，认为满足第三失败事件，所述第三失败事件包括无线链路失败或第三同步过程失败；In the case where the third synchronization is not completed, it is considered that a third failure event is satisfied, and the third failure event includes a radio link failure or a third synchronization process failure;

在认为满足所述第三失败事件的情况下，执行第三操作。When it is considered that the third failure event is satisfied, a third operation is performed.

在所述第三同步过程为通过RACH过程执行的同步过程，且终端的RRC层在第三时间窗外接收到终端的MAC层指示的随机接入问题的情况下，认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the third time window, it is considered that the third failure event is met;

在所述第三同步过程为通过RACH过程执行的同步过程，且在终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第三预设次数的情况下，确定认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number, determining that the third failure event is met;

在所述第三同步过程为通过RACH-less过程执行的同步过程，且在第三时间窗内同步过程未完成的情况下，认为满足第三失败事件；When the third synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a third time window, it is considered that a third failure event is satisfied;

在所述第三同步过程为通过RACH过程执行的同步过程，且终端的RRC层接收到终端的MAC层指示的随机接入问题的次数大于或等于第三预设次数的情况下，所述第三同步过程未完成； In a case where the third synchronization process is a synchronization process performed through a RACH process, and the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number of times, the third synchronization process is not completed;

第五时刻和第三持续时间；fifth moment and third duration;

第五时刻和第六时刻；The fifth and sixth moments;

确定模块，用于基于第一指示信息或第二条件确定所述第一同步过程的同步方式；A determination module, configured to determine a synchronization mode of the first synchronization process based on the first indication information or the second condition;

测量模块，用于在所述第一时刻获取第二测量结果，所述第二测量结果包括所述第二信号强度、所述第二信号质量和所述第二参考位置中的至少一项。The measurement module is used to obtain a second measurement result at the first moment, where the second measurement result includes at least one of the second signal strength, the second signal quality and the second reference position.

可选地，所述第一执行模块601具体用于执行以下任一项：Optionally, the first execution module 601 is specifically configured to execute any of the following:

在终端从网络侧设备接收到第一指示信息，且所述第一指示信息指示所述终端通过RACH过程执行第一同步过程的情况下，在第一时刻通过RACH过程执行第一同步过程；When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs a first synchronization process through a RACH process, performing the first synchronization process through the RACH process at a first moment;

在终端从网络侧设备接收到第一指示信息，且所述第一指示信息指示所述终端通过RACH-less过程执行第一同步过程的情况下，在第一时刻通过RACH-less过程执行第一同步过程；When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs the first synchronization process through the RACH-less process, performing the first synchronization process through the RACH-less process at a first moment;

在终端尚未接收到网络侧设备发送的第一指示信息的情况下，在第一时刻通过RACH过程执行第一同步过程；When the terminal has not yet received the first indication information sent by the network side device, performing a first synchronization process through a RACH process at a first moment;

在满足所述第二条件的情况下，在第一时刻通过RACH-less过程执行第一同步过程；When the second condition is met, performing a first synchronization process through a RACH-less process at a first moment;

在不满足所述第二条件的情况下，在第一时刻通过RACH过程执行第一同步过程。When the second condition is not met, a first synchronization process is performed through a RACH process at a first time.

第二发送模块，用于在基于第二条件确定所述第一同步过程的同步方式的情况下，向网络侧设备发送第二指示信息，所述第二指示信息用于指示所述第一同步过程的同步方式。The second sending module is used to send second indication information to the network side device when the synchronization mode of the first synchronization process is determined based on a second condition, wherein the second indication information is used to indicate the synchronization mode of the first synchronization process.

可选地，通过RACH过程执行的同步过程包括：发起RACH过程；发起定时提前上报流程。Optionally, the synchronization process performed through the RACH process includes: initiating a RACH process; initiating a timing advance reporting process.

可选地，通过RACH-less过程执行的同步过程包括：Optionally, the synchronization process performed through the RACH-less process includes:

基于所述目标上行调度发送定时提前报告。 A timing advance report is sent based on the target uplink scheduling.

接收模块，用于从网络侧设备接收第一信息，所述第一信息用于确定所述第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；A receiving module, configured to receive first information from a network side device, wherein the first information is used to determine the first time; the first information includes any one of the following: time information indicated by dedicated signaling or system message; third indication information and information used to indicate when the serving cell stops serving;

获取模块，用于在第一时刻之前，通过系统消息获取第二信息，所述第二信息包括接入目标卫星所需要的卫星辅助信息；an acquisition module, configured to acquire second information through a system message before a first moment, wherein the second information includes satellite auxiliary information required for accessing a target satellite;

所述第一执行模块601具体用于基于所述第二信息在第一时刻执行第一同步过程；The first execution module 601 is specifically configured to execute a first synchronization process at a first moment based on the second information;

认为系统消息包含的目标列表中，第一元素包括的卫星辅助信息为所述第二信息，所述第一元素中指示的载波频率和服务小区的载波频率相同，且所述第一元素中指示的PCI与所述服务小区的PCI相同；It is considered that in the target list included in the system message, the satellite auxiliary information included in the first element is the second information, the carrier frequency indicated in the first element is the same as the carrier frequency of the serving cell, and the PCI indicated in the first element is the same as the PCI of the serving cell;

基于网络侧设备发送的第四指示信息确定系统消息包含的目标列表中，第二元素包括的卫星辅助信息为所述第二信息；Determine, based on the fourth indication information sent by the network side device, that in the target list included in the system message, the satellite auxiliary information included in the second element is the second information;

将系统消息中目标域包含的卫星辅助信息确定为所述第二信息；Determining the satellite assistance information included in the target field in the system message as the second information;

其中，所述目标列表为包括邻小区的卫星辅助信息的列表。The target list is a list including satellite auxiliary information of neighboring cells.

载波频率和PCI；Carrier frequency and PCI;

卫星标识。Satellite identification.

本申请实施例提供的同步处理方法，执行主体可以为同步处理装置。本申请实施例中以同步处理装置执行同步处理方法为例，说明本申请实施例提供的同步处理装置。The synchronization processing method provided in the embodiment of the present application can be executed by a synchronization processing device. In the embodiment of the present application, the synchronization processing device provided in the embodiment of the present application is described by taking the synchronization processing method executed by the synchronization processing device as an example.

参照图7，本申请实施例还体用了一种同步处理装置，如图7所示，该同步处理装置700包括：7 , the embodiment of the present application also embodies a synchronization processing device. As shown in FIG7 , the synchronization processing device 700 includes:

第一发送模块701，用于向终端发送第一信息，所述第一信息用于确定终端执行第一同步过程的第一时刻；所述第一信息包括以下任一项：通过专用信令或系统消息指示的时间信息；第三指示信息和用于指示服务小区何时停止服务的信息；The first sending module 701 is used to send first information to the terminal, where the first information is used to determine the first moment when the terminal performs the first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or system message; third indication information and information used to indicate when the serving cell stops serving;

所述第三指示信息用于指示服务小区支持以下任一项：在服务链路切换的情况下，终端认为物理小区标识符PCI不改变；在服务链路切换的情况下，终端不执行层3切换；在服务链路切换的情况下，终端执行同步过程；在所述第一时刻执行同步过程。The third indication information is used to indicate that the serving cell supports any of the following: in the case of service link switching, the terminal The terminal considers that the physical cell identifier PCI does not change; in the case of service link switching, the terminal does not perform layer 3 switching; in the case of service link switching, the terminal performs a synchronization process; and the synchronization process is performed at the first moment.

可选地，所述第一发送模块701还用于：Optionally, the first sending module 701 is further used for:

在所述第一时刻之前，发送系统消息，所述系统消息用于确定第二信息，所述第二信息包括接入目标卫星所需要的卫星辅助信息；Before the first moment, sending a system message, where the system message is used to determine second information, where the second information includes satellite assistance information required for accessing a target satellite;

载波频率和PCI；Carrier frequency and PCI;

卫星标识。Satellite identification.

可选地，所述第一发送模块701还用于：向终端发送第一指示信息，所述第一指示信息用于指示终端通过RACH过程执行第一同步过程或通过RACH-less过程执行第一同步过程。Optionally, the first sending module 701 is further used to: send first indication information to the terminal, where the first indication information is used to instruct the terminal to perform the first synchronization process through a RACH process or to perform the first synchronization process through a RACH-less process.

本申请实施例中的同步过程的失败处理装置和同步处理装置可以是电子设备，例如具有操作系统的电子设备，也可以是电子设备中的部件，例如集成电路或芯片。该电子设备可以是终端，也可以为除终端之外的其他设备。示例性的，终端可以包括但不限于上述所列举的终端11的类型，其他设备可以为服务器、网络附属存储器(Network Attached Storage，NAS)等，本申请实施例不作具体限定。The failure handling device and synchronization processing device of the synchronization process in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

本申请实施例提供的同步过程的失败处理装置和同步处理装置能够实现图4至图5的方法实施例实现的各个过程，并达到相同的技术效果，为避免重复，这里不再赘述。The failure handling device and synchronization processing device of the synchronization process provided in the embodiments of the present application can implement the various processes implemented by the method embodiments of Figures 4 to 5 and achieve the same technical effects. To avoid repetition, they will not be described here.

如图8所示，本申请实施例还提供一种通信设备800，包括处理器801和存储器802，存储器802上存储有可在所述处理器801上运行的程序或指令，例如，该通信设备800为终端时，该程序或指令被处理器801执行时实现上述同步过程的失败处理方法实施例的各个步骤，且能达到相同的技术效果。该通信设备800为网络侧设备时，该程序或指令被处理器801执行时实现上述同步处理方法实施例的各个步骤，且能达到相同的技术效果，为避免重复，这里不再赘述。As shown in FIG8 , the embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802, wherein the memory 802 stores a program or instruction that can be run on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction is executed by the processor 801 to implement the various steps of the failure handling method embodiment of the above-mentioned synchronization process, and can achieve the same technical effect. When the communication device 800 is a network side device, the program or instruction is executed by the processor 801 to implement the various steps of the synchronization processing method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

本申请实施例还提供一种终端，包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如图4所示方法实施例中的步骤。该终端实施例与上述终端侧方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该终端实施例中，且能达到相同的技术效果。具体地，图9为实现本申请实施例的一种终端的硬件结构示意图。The embodiment of the present application also provides a terminal, including a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the steps in the method embodiment shown in Figure 4. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, Figure 9 is a method for implementing the embodiment of the present application. Schematic diagram of the terminal's hardware structure.

该终端900包括但不限于：射频单元901、网络模块902、音频输出单元903、输入单元904、传感器905、显示单元906、用户输入单元907、接口单元908、存储器909以及处理器910等中的至少部分部件。The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909 and at least some of the components of a processor 910.

本领域技术人员可以理解，终端900还可以包括给各个部件供电的电源(比如电池)，电源可以通过电源管理系统与处理器910逻辑相连，从而通过电源管理系统实现管理充电、放电以及功耗管理等功能。图9中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置，在此不再赘述。Those skilled in the art will appreciate that the terminal 900 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 910 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG9 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently, which will not be described in detail here.

应理解的是，本申请实施例中，输入单元904可以包括图形处理单元(Graphics Processing Unit，GPU)9041和麦克风9042，图形处理单元9041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元906可包括显示面板9061，可以采用液晶显示器、有机发光二极管等形式来配置显示面板9061。用户输入单元907包括触控面板9071以及其他输入设备9072中的至少一种。触控面板9071，也称为触摸屏。触控面板9071可包括触摸检测装置和触摸控制器两个部分。其他输入设备9072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processing unit 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

本申请实施例中，射频单元901接收来自网络侧设备的下行数据后，可以传输给处理器910进行处理；另外，射频单元901可以向网络侧设备发送上行数据。通常，射频单元901包括但不限于天线、放大器、收发信机、耦合器、低噪声放大器、双工器等。In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 901 can transmit the data to the processor 910 for processing; in addition, the RF unit 901 can send uplink data to the network side device. Generally, the RF unit 901 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

存储器909可用于存储软件程序或指令以及各种数据。存储器909可主要包括存储程序或指令的第一存储区和存储数据的第二存储区，其中，第一存储区可存储操作系统、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外，存储器909可以包括易失性存储器或非易失性存储器。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synch link DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请实施例中的存储器909包括但不限于这些和任意其它适合类型的存储器。The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

处理器910可包括一个或多个处理单元；可选地，处理器910集成应用处理器和调制解调处理器，其中，应用处理器主要处理涉及操作系统、用户界面和应用程序等的操作，调制解调处理器主要处理无线通信信号，如基带处理器。可以理解的是，上述调制解调处理器也可以不集成到处理器910中。The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the above-mentioned modem processor The processor may not be integrated into the processor 910.

其中，射频单元901，用于在第一时刻执行第一同步过程；在所述第一同步过程未完成的情况下，终端执行第一操作；The radio frequency unit 901 is configured to perform a first synchronization process at a first moment; if the first synchronization process is not completed, the terminal performs a first operation;

执行第二同步过程；executing a second synchronization process;

进入RRC空闲态；Enter RRC idle state;

可以理解，本实施例中提及的各实现方式的实现过程可以参照同步过程的失败处理方法实施例的相关描述，并达到相同或相应的技术效果，为避免重复，在此不再赘述。It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the failure handling method embodiment of the synchronization process, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

本申请实施例还提供一种网络侧设备，包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如图5所示的方法实施例的步骤。该网络侧设备实施例与上述网络侧设备方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该网络侧设备实施例中，且能达到相同的技术效果。The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the method embodiment shown in Figure 5. The network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

具体地，本申请实施例还提供了一种网络侧设备。如图10所示，该网络侧设备1000包括：天线101、射频装置102、基带装置103、处理器104和存储器105。天线101与射频装置102连接。在上行方向上，射频装置102通过天线101接收信息，将接收的信息发送给基带装置103进行处理。在下行方向上，基带装置103对要发送的信息进行处理，并发送给射频装置102，射频装置102对收到的信息进行处理后经过天线101发送出去。Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 10, the network side device 1000 includes: an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104 and a memory 105. The antenna 101 is connected to the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101 and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102. The radio frequency device 102 processes the received information and sends it out through the antenna 101.

以上实施例中网络侧设备执行的方法可以在基带装置103中实现，该基带装置103包括基带处理器。The method executed by the network-side device in the above embodiment may be implemented in the baseband device 103, which includes a baseband processor.

基带装置103例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图10所示，其中一个芯片例如为基带处理器，通过总线接口与存储器105连接，以调用存储器105中的程序，执行以上方法实施例中所示的网络设备操作。The baseband device 103 may include, for example, at least one baseband board, on which a plurality of chips are arranged, as shown in FIG10 , wherein one of the chips is, for example, a baseband processor, which is connected to the memory 105 through a bus interface to call a program in the memory 105 and execute the network device operations shown in the above method embodiment.

该网络侧设备还可以包括网络接口106，该接口例如为通用公共无线接口(Common Public Radio Interface，CPRI)。The network side device may also include a network interface 106, which is, for example, a Common Public Radio Interface (CPRI).

具体地，本申请实施例的网络侧设备1000还包括：存储在存储器105上并可在处理器104上运行的指令或程序，处理器104调用存储器105中的指令或程序执行图7所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。Specifically, the network side device 1000 of the embodiment of the present application also includes: instructions or programs stored in the memory 105 and executable on the processor 104. The processor 104 calls the instructions or programs in the memory 105 to execute the method executed by each module shown in Figure 7 and achieves the same technical effect. To avoid repetition, it will not be repeated here.

本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述同步过程的失败处理方法或同步处理方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the failure handling method of the above-mentioned synchronization process or each process of the synchronization processing method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。在一些示例中，可读存储介质可以是非瞬态的可读存储介质。The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. Etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述同步过程的失败处理方法或同步处理方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the failure handling method of the above-mentioned synchronization process or each process of the synchronization processing method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

本申请实施例另提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现上述同步过程的失败处理方法或同步处理方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。The embodiments of the present application further provide a computer program/program product, which is stored in a storage medium, and is executed by at least one processor to implement the failure handling method of the above-mentioned synchronization process or the various processes of the synchronization processing method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

本申请实施例还提供了一种无线通信系统，包括：终端及网络侧设备，所述终端可用于执行如上所述的同步过程的失败处理方法的步骤，所述网络侧设备可用于执行如上所述的同步处理方法的步骤。An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the failure handling method of the synchronization process as described above, and the network side device can be used to execute the steps of the synchronization processing method as described above.

需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能，还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助计算机软件产品加必需的通用硬件平台的方式来实现，当然也可以通过硬件。该计算机软件产品存储在存储介质(如ROM、RAM、磁碟、光盘等)中，包括若干指令，用以使得终端或者网络侧设备执行本申请各个实施例所述的方法。Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式的实施方式，这些实施方式均属于本申请的保护之内。 The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

A method for handling failure of a synchronization process, comprising:

The terminal performs a first synchronization process at a first moment;

When the first synchronization process is not completed, the terminal performs a first operation;

The first operation includes any one of the following:

executing a second synchronization process;

Initiate the radio resource control RRC connection reestablishment process;

Enter RRC idle state;

The first synchronization process and the second synchronization process both include at least one of a time synchronization process and a frequency synchronization process.

The method according to claim 1, wherein at least one of the first synchronization process and the second synchronization process satisfies any one of the following:

A synchronization process performed through a random access channel RACH process;

The synchronization procedure is performed through the RACH-less procedure.

The method according to claim 1, wherein, when the first synchronization process is not completed, the terminal performing the first operation comprises:

In a case where the first synchronization process is not completed, the terminal considers that a first failure event is satisfied, where the first failure event includes a radio link failure or a first synchronization process failure;

When the terminal considers that the first failure event is satisfied, the terminal performs the first operation.

The method according to claim 3, wherein, when the first synchronization process is not completed, the terminal considers that the first failure event is satisfied, including at least one of the following:

When the first synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the first time window, the terminal considers that a first failure event is satisfied;

When the first synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a first preset number, the terminal considers that a first failure event is satisfied;

When the first synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a first time window, the terminal considers that a first failure event is satisfied;

The first time window is a time window used to execute the first synchronization process.

The method according to claim 1, wherein the first synchronization process is not completed, including at least one of the following:

In the first time window, the first synchronization process is not completed;

In the case where the first synchronization process is a synchronization process performed through a RACH process and the number of times that the RRC layer of the terminal receives the random access question indicated by the MAC layer of the terminal is greater than or equal to a first preset number of times, the first synchronization process The process is not completed;

The first time window is a time window for executing the first synchronization process, and the starting time of the first time window is the first time.

The method according to any one of claims 1 to 5, wherein the first operation comprises performing a second synchronization process, and the method further comprises:

When the second synchronization process is not completed, the terminal performs a second operation, and the second operation includes any one of the following: initiating an RRC connection reconstruction process; entering an RRC idle state.

The method according to claim 6, wherein, when the second synchronization process is not completed, the terminal performing the second operation comprises:

In a case where the second synchronization is not completed, the terminal considers that a second failure event is satisfied, where the second failure event includes a radio link failure or a second synchronization process failure;

When the terminal considers that the second failure event is satisfied, the terminal performs a second operation.

The method according to claim 7, wherein, when the second synchronization is not completed, the terminal considers that the second failure event is satisfied, including at least one of the following:

When the second synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the second time window, the terminal considers that a second failure event is met;

When the second synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a second preset number, the terminal considers that a second failure event is satisfied;

When the second synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a second time window, the terminal considers that a second failure event is satisfied;

The second time window is a time window for executing the second synchronization process, the start time of the second time window is the end time of the first time window, and the first time window is a time window for executing the first synchronization process.

The method according to claim 6, wherein the second synchronization process is not completed, including at least one of the following:

In the second time window, the second synchronization process is not completed;

When the second synchronization process is a synchronization process performed through a RACH process, and the number of times the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a second preset number of times, the second synchronization process is not completed;

The second time window is a time window for executing the second synchronization, the start time of the second time window is the end time of the first time window, and the first time window is a time window for executing the first synchronization process.

The method according to claim 4, 5, 8 or 9, wherein the first time window is determined based on any one of the following:

The first moment and the running time of the first timer;

the first moment and the first duration;

the first moment and the second moment;

The second moment is located after the first moment.

The method according to claim 10, wherein the first timer satisfies at least one of the following:

The start time of the first timer is the first time;

The condition for stopping the first timer includes that the terminal completes synchronization during the running of the first timer;

When the first timer times out, the first time window ends.

The method according to claim 8 or 9, wherein the second time window is determined based on any one of the following:

The third moment and the running time of the second timer;

the third moment and the second duration;

The third and fourth moments;

The third moment is the end moment of the first time window, and the fourth moment is after the third moment.

The method according to any one of claims 1 to 12, wherein:

When the first condition is met, the first operation includes executing a second synchronization process; and/or,

When the first condition is not met, the first operation includes initiating an RRC connection reestablishment procedure or entering an RRC idle state.

The method according to claim 13, wherein the first condition includes at least one of the following:

A first signal strength of the first cell measured by the terminal is greater than or equal to a first threshold;

The first signal quality of the first cell measured by the terminal is greater than or equal to the second threshold;

The distance between the position of the terminal and the first reference position of the first cell is less than or equal to a third threshold;

The first cell is a cell used to perform the first synchronization process.

The method according to claim 14, further comprising:

The terminal obtains a first measurement result at a third moment, where the first measurement result includes at least one of the first signal strength, the first signal quality, and the first reference position.

The method according to any one of claims 1 to 5, wherein after initiating the RRC connection reestablishment process, the method further comprises:

The terminal selects the second cell;

In the case that the second cell and the first cell are different cells, the terminal sends an RRC reestablishment request message to the second cell; wherein the first cell is a cell used to perform the first synchronization process.

The method according to claim 16, further comprising:

In a case where the second cell and the first cell are the same cell, the terminal performs a third synchronization process;

The third synchronization process includes at least one of a time synchronization process and a frequency synchronization process.

The method according to claim 17, further comprising:

If the third synchronization process is not completed, the terminal performs a third operation, where the third operation includes at least one of the following:

Initiate the connection reestablishment process;

Enter RRC idle state.

The method according to claim 18, wherein, when the third synchronization process is not completed, the terminal performing a third operation comprises:

In a case where the third synchronization is not completed, the terminal considers that a third failure event is satisfied, where the third failure event includes a radio link failure or a third synchronization process failure;

When the terminal determines that the third failure event is satisfied, the terminal performs a third operation.

The method according to claim 19, wherein, when the third synchronization is not completed, the terminal considers that the third failure event is satisfied, including at least one of the following:

When the third synchronization process is a synchronization process performed through a RACH process, and the RRC layer of the terminal receives a random access problem indicated by the MAC layer of the terminal outside the third time window, the terminal considers that a third failure event is satisfied;

When the third synchronization process is a synchronization process performed through a RACH process, and when the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number, the terminal considers that a third failure event is satisfied;

When the third synchronization process is a synchronization process performed through a RACH-less process and the synchronization process is not completed within a third time window, the terminal considers that a third failure event is satisfied;

The third time window is a time window for executing the third synchronization process.

The method according to claim 18, wherein the third synchronization process is not completed including at least one of the following:

In the third time window, the third synchronization process is not completed;

In a case where the third synchronization process is a synchronization process performed through a RACH process, and the number of times that the RRC layer of the terminal receives the random access problem indicated by the MAC layer of the terminal is greater than or equal to a third preset number of times, the third synchronization process is not completed;

The third time window is a time window used to perform the third synchronization.

The method according to claim 20 or 21, wherein the third time window is determined based on any one of the following:

The fifth moment and the running time of the third timer;

fifth moment and third duration;

The fifth and sixth moments;

Among them, the fifth moment is the moment when it is determined that the second cell and the first cell are the same cell, or the end time of the first time window, or the moment when the RRC connection reconstruction process is initiated, the first time window is the time window for executing the first synchronization process, and the sixth moment is after the fifth moment.

The method according to any one of claims 1 to 22, further comprising:

The terminal determines the synchronization mode of the first synchronization process based on the first indication information or the second condition;

The first indication information is used to instruct the terminal to perform the first synchronization process through a RACH process or to perform the first synchronization process through a RACH-less process; the second condition includes at least one of the following: the first The second signal strength of the cell is greater than or equal to the first threshold; the second signal quality of the first cell measured by the terminal is greater than or equal to the second threshold; the distance between the terminal's position and the second reference position of the first cell is less than or equal to a third threshold.

The method according to claim 23, further comprising:

The terminal obtains a second measurement result at the first moment, where the second measurement result includes at least one of the second signal strength, the second signal quality, and the second reference position.

The method according to claim 23, wherein the terminal performing the first synchronization process at the first moment comprises any one of the following:

When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs a first synchronization process through a RACH process, the terminal performs the first synchronization process through the RACH process at a first moment;

When the terminal receives first indication information from the network side device, and the first indication information indicates that the terminal performs the first synchronization process through the RACH-less process, the terminal performs the first synchronization process through the RACH-less process at a first moment;

In a case where the terminal has not yet received the first indication information sent by the network side device, the terminal performs a first synchronization process through a RACH process at a first moment;

When the second condition is met, the terminal performs a first synchronization process through a RACH-less process at a first moment;

When the second condition is not met, the terminal performs a first synchronization process through a RACH process at a first moment.

The method according to claim 25, wherein, when the terminal determines the synchronization mode of the first synchronization process based on the second condition, the method further comprises:

The terminal sends second indication information to the network side device, where the second indication information is used to indicate a synchronization mode of the first synchronization process.

The method according to any one of claims 2, 4, 8, 23 and 25, wherein the synchronization process performed through the RACH process includes: initiating the RACH process; initiating a timing advance reporting process.

The method according to any one of claims 2, 4, 8, 23 and 25, wherein the synchronization process performed by the RACH-less process comprises:

Obtain target uplink scheduling and trigger the timing advance reporting process;

A timing advance report is sent based on the target uplink scheduling.

The method according to any one of claims 1 to 28, further comprising:

The terminal receives first information from a network side device, where the first information is used to determine the first time; the first information includes any one of the following: time information indicated by dedicated signaling or system message; third indication information and information used to indicate when the serving cell stops serving;

The time information includes any one of the following: the time when the target satellite starts to provide coverage, the target satellite is the satellite that the terminal needs to access; the time when the service cell stops service and the preset time offset; the preset time offset;

The third indication information is used to indicate that the service cell supports any one of the following items: in the case of service link switching, the terminal considers that the physical cell identifier PCI does not change; in the case of service link switching, the terminal does not perform layer 3 switching; in the case of service link switching, the terminal performs a synchronization process; and performs the synchronization process at the first moment.

The method according to any one of claims 1 to 29, further comprising:

Before the first moment, the terminal obtains second information through a system message, where the second information includes satellite assistance information required for accessing a target satellite;

The terminal performing a first synchronization process at a first moment includes: the terminal performing a first synchronization process at a first moment based on the second information;

The method for the terminal to obtain the second information includes any one of the following:

The terminal considers that in the target list included in the system message, the satellite auxiliary information included in the first element is the second information, the carrier frequency indicated in the first element is the same as the carrier frequency of the serving cell, and the PCI indicated in the first element is the same as the PCI of the serving cell;

The terminal determines, based on the fourth indication information sent by the network side device, that in the target list included in the system message, the satellite auxiliary information included in the second element is the second information;

The terminal determines the satellite assistance information included in the target field in the system message as the second information;

The target list is a list including satellite auxiliary information of neighboring cells.

The method according to claim 30, wherein the fourth indication information includes any one of the following:

An index value, where the index value is used to indicate a position of the second element;

Carrier frequency and PCI;

Satellite identification.

A synchronization processing method, comprising:

The network side device sends first information to the terminal, where the first information is used to determine a first moment when the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or a system message; third indication information and information used to indicate when the serving cell stops serving;

The method according to claim 32, further comprising:

Before the first moment, the network side device sends a system message, where the system message is used to determine second information, where the second information includes satellite auxiliary information required for accessing a target satellite;

In the target list included in the system message, the satellite assistance information included in the first element is the second information, the carrier frequency indicated in the first element is the same as the carrier frequency of the serving cell, and the PCI indicated in the first element is the same as the PCI of the serving cell;

In the target list included in the system message, the satellite auxiliary information included in the second element is the second information, and the second element is determined by the fourth indication information sent by the network side device;

The satellite assistance information included in the target field in the system message is the second information.

The method according to claim 33, wherein the fourth indication information includes any one of the following:

Carrier frequency and PCI;

Satellite identification.

The method according to claim 32, further comprising:

The network side device sends first indication information to the terminal, where the first indication information is used to instruct the terminal to perform the first synchronization process through a RACH process or to perform the first synchronization process through a RACH-less process.

A synchronization process failure processing device, comprising:

A first execution module, configured to execute a first synchronization process at a first moment;

A second execution module, when the first synchronization process is not completed, the terminal executes a first operation;

The first operation includes any one of the following:

executing a second synchronization process;

Initiate the radio resource control RRC connection reestablishment process;

Enter RRC idle state;

A synchronization processing device, comprising:

A first sending module, configured to send first information to a terminal, wherein the first information is used to determine a first moment at which the terminal performs a first synchronization process; the first information includes any one of the following: time information indicated by dedicated signaling or a system message; third indication information and information used to indicate when a serving cell stops serving;

A terminal comprises a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the failure handling method of the synchronization process as described in any one of claims 1 to 32 are implemented.

A network side device comprises a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the synchronization processing method as described in any one of claims 32 to 36 are implemented.

A readable storage medium stores a program or instruction, and the program or instruction is processed When executed by the device, the steps of the failure handling method of the synchronization process as described in any one of claims 1 to 31 are implemented, or the steps of the synchronization processing method as described in any one of claims 32 to 36 are implemented.