WO2023077385A1

WO2023077385A1 - Wireless communication method, and terminal device and network device

Info

Publication number: WO2023077385A1
Application number: PCT/CN2021/128817
Authority: WO
Inventors: 吴作敏
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2023-05-11
Also published as: CN117859380A

Abstract

Provided in the embodiments of the present application are a wireless communication method, and a terminal device and a network device. By means of defining and meeting the condition of acquiring synchronization assistance information and/or a timing advance value during the process of a terminal device accessing a cell, the terminal device can perform uplink transmission after completing time domain and/or frequency domain synchronization, such that uplink loss of synchronism of the terminal device is avoided. The wireless communication method comprises: when initiating a first process, a terminal device meeting at least one of the following conditions: the terminal device acquiring synchronization assistance information before the first process; the terminal device acquiring the synchronization assistance information during the first process; the terminal device acquiring a timing advance value before the first process; or the terminal device acquiring the timing advance value during the first process, wherein the first process comprises at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating EDT, and initiating transmission using a PUR.

Description

Wireless communication method, terminal device and network device

technical field

The embodiments of the present application relate to the communication field, and more specifically, relate to a wireless communication method, a terminal device, and a network device.

Background technique

In a non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, the terminal device needs to obtain the synchronization assistance information of the network device before it can complete time domain and/or frequency domain synchronization, so as to perform uplink transmission. However, how to achieve time domain and/or frequency domain synchronization during the cell access process is an urgent problem to be solved.

Contents of the invention

The embodiment of the present application provides a wireless communication method, terminal equipment, and network equipment. By limiting the conditions for obtaining synchronization assistance information and/or timing advance values during the process of terminal equipment accessing a cell, the terminal equipment can be completed Uplink transmission is performed after time domain and/or frequency domain synchronization, so as to avoid uplink desynchronization of terminal equipment.

In a first aspect, a wireless communication method is provided, and the method includes:

The terminal device meets at least one of the following conditions when initiating the first process:

The terminal device acquires synchronization assistance information prior to the first procedure;

The terminal device acquires the synchronization assistance information in the first process;

The terminal device acquires a timing advance value prior to the first procedure;

The terminal device acquires the timing advance value in the first process;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization;

Wherein, the timing advance value includes the timing advance value of the serving link and/or the timing advance value of the feeder link;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating EDT, initiating transmission using PUR.

In a second aspect, a wireless communication method is provided, and the method includes:

The terminal device initiates a second process, where the second process is used to request system information carrying synchronization assistance information;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization.

In a third aspect, a wireless communication method is provided, and the method includes:

The network device sends first information to the terminal device, where the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

The terminal device obtains a timing advance value before the first process;

The terminal device acquires the timing advance value in the first process;

In a fourth aspect, a method for wireless communication is provided, and the method includes:

The network device sends the system information carrying the synchronization auxiliary information to the terminal device after the second process initiated by the terminal device, where the second process is used to request the system information carrying the synchronization auxiliary information;

In a fifth aspect, a terminal device is provided, configured to execute the method in the first aspect above.

Specifically, the terminal device includes a functional module for executing the method in the first aspect above.

In a sixth aspect, a terminal device is provided, configured to execute the method in the second aspect above.

Specifically, the terminal device includes a functional module for executing the method in the second aspect above.

In a seventh aspect, a network device is provided, configured to execute the method in the third aspect above.

Specifically, the network device includes a functional module for executing the method in the above third aspect.

In an eighth aspect, a network device is provided, configured to execute the method in the fourth aspect above.

Specifically, the network device includes a functional module for executing the method in the fourth aspect above.

A ninth aspect provides a terminal device, including a processor and a memory; wherein, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and execute the first to second aspects above. The method in any of the aspects.

In a tenth aspect, a network device is provided, including a processor and a memory; wherein, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and implement the above-mentioned third to fourth aspects The method in any of the aspects.

In an eleventh aspect, a device is provided for implementing the method in any one of the above first to fourth aspects.

Specifically, the device includes: a processor, configured to invoke and run a computer program from the memory, so that the device installed with the device executes the method in any one of the first aspect to the fourth aspect above.

In a twelfth aspect, there is provided a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in any one of the above-mentioned first aspect to the fourth aspect.

A thirteenth aspect provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above first to fourth aspects.

In a fourteenth aspect, a computer program is provided, which, when running on a computer, causes the computer to execute the method in any one of the above first to fourth aspects.

Through the above-mentioned technical solutions of the first aspect and the third aspect, the terminal device meets at least one of the following conditions when initiating the first process: the terminal device acquires synchronization assistance information before the first process, and the terminal device acquires synchronization assistance information during the first process. Synchronize auxiliary information, the terminal device obtains the timing advance value before the first process, and the terminal device obtains the timing advance value during the first process; wherein the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning System information, initiate RRC connection establishment, initiate RRC connection recovery, initiate RRC connection re-establishment, initiate EDT, initiate transmission using PUR. In addition, by limiting the conditions for obtaining synchronization assistance information and/or timing advance values during the process of terminal equipment accessing the cell, the terminal equipment can perform uplink transmission after completing time domain and/or frequency domain synchronization, avoiding the need for terminal equipment to uplink out of step.

Through the above-mentioned technical solutions of the second aspect and the fourth aspect, the terminal device initiates the second process to obtain system information carrying synchronization assistance information, and the terminal device can complete time domain and/or frequency domain synchronization based on the synchronization assistance information. It is possible to enable the terminal equipment to perform uplink transmission after completing time domain and/or frequency domain synchronization, so as to avoid uplink out-of-synchronization of the terminal equipment.

Description of drawings

1A-1C are schematic diagrams of an application scenario provided by an embodiment of the present application.

Fig. 2 is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.

Fig. 3 is a schematic diagram of uplink and downlink timing provided according to an embodiment of the present application.

Fig. 4 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.

Fig. 5 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.

Fig. 6 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a network device provided according to an embodiment of the present application.

Fig. 9 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of another network device provided according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of an apparatus provided according to an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication system provided according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. With regard to the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Internet of Things ( internet of things, IoT), wireless fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application may also be applied to these communication systems.

In some embodiments, the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and can also be applied to an independent (Standalone, SA ) meshing scene.

In some embodiments, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to a licensed spectrum, Wherein, the licensed spectrum can also be regarded as a non-shared spectrum.

In some embodiments, the communication system in the embodiment of the present application can be applied to the FR1 frequency band (corresponding to the frequency range of 410MHz to 7.125GHz), and can also be applied to the FR2 frequency band (corresponding to the frequency range of 24.25GHz to 52.6GHz), and can also be applied to The new frequency band corresponds to, for example, a frequency range from 52.6 GHz to 71 GHz or a high-frequency frequency range from 71 GHz to 114.25 GHz.

In some embodiments, the embodiments of the present application may be applied to a non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, and may also be applied to a terrestrial communication network (Terrestrial Networks, TN) system.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In the embodiment of this application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).

In this embodiment of the application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home. The terminal equipment involved in the embodiments of the present application may also be referred to as terminal, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station , remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. Terminal equipment can also be fixed or mobile.

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

In the embodiment of the present application, the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network The network equipment (gNB) in the network or the network equipment in the future evolved PLMN network or the network equipment in the NTN network, etc.

As an example but not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network equipment may be a satellite or a balloon station. For example, the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc. Optionally, the network device may also be a base station installed on land, water, and other locations.

In this embodiment of the application, the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

It should be noted that NTN generally uses satellite communication to provide communication services to ground users. The NTN system currently includes New Radio Non-Terrestrial Networks (NR-NTN) and Internet of Things Non-Terrestrial Networks (IoT-NTN) systems. Among them, the IoT-NTN system includes at least Narrow Band Internet of Things Non-Terrestrial Networks (NB-IoT-NTN) and Enhanced Machine Type Communication Non-Terrestrial Networks (Enhanced Machine Type Communication Non-Terrestrial Networks, eMTC-NTN) system. It should be understood that in the NR-NTN system, the network device may be a gNB; in the IoT-NTN system, the network device may be an eNB.

Exemplarily, FIG. 1A is a schematic structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1A , a communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.

FIG. 1A exemplarily shows one network device and two terminal devices. In some embodiments of the present application, the communication system 100 may include multiple network devices and each network device may include other numbers of terminals within the coverage area. The device is not limited in the embodiment of this application.

Exemplarily, FIG. 1B is a schematic structural diagram of another communication system provided by an embodiment of the present application. Referring to FIG. 1B , a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102 . The network formed between the terminal device 1101 and the satellite 1102 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 1B , the satellite 1102 may function as a base station, and the terminal device 1101 and the satellite 1102 may communicate directly. Under the system architecture, the satellite 1102 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and the coverage of each network device 1102 may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

Exemplarily, FIG. 1C is a schematic structural diagram of another communication system provided by an embodiment of the present application. Referring to FIG. 1C , it includes a terminal device 1201 , a satellite 1202 and a base station 1203 , wireless communication can be performed between the terminal device 1201 and the satellite 1202 , and communication can be performed between the satellite 1202 and the base station 1203 . The network formed among the terminal equipment 1201, the satellite 1202 and the base station 1203 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 1C , the satellite 1202 may not have the function of a base station, and the communication between the terminal device 1201 and the base station 1203 needs to be relayed through the satellite 1202 . Under this system architecture, the base station 1203 may be called a network device. In some embodiments of the present application, the communication system may include multiple network devices 1203, and the coverage of each network device 1203 may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

It should be noted that Fig. 1A-Fig. 1C are only illustrations of the systems to which this application is applicable. Of course, the methods shown in the embodiments of this application can also be applied to other systems, for example, 5G communication systems, LTE communication systems, etc. , which is not specifically limited in this embodiment of the present application.

Optionally, the wireless communication system shown in FIG. 1A-FIG. 1C may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc. , which is not limited in this embodiment of the present application.

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1A as an example, the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions, and the network equipment 110 and the terminal equipment 120 may be the specific equipment described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In this embodiment of the present application, "configuration" may include that the network device sends instruction information to the terminal device to complete.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

In the embodiment of this application, "predefined" or "preconfigured" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). The application does not limit its specific implementation. For example, pre-defined may refer to defined in the protocol.

In the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which is not limited in the present application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific examples. The following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them belong to the protection scope of the embodiments of the present application. The embodiment of the present application includes at least part of the following contents.

With the evolution of the NR system, the research of the NR system can include new frequency bands such as 52.6GHz–71GHz or 71GHz–114.25GHz. The new frequency band may include licensed spectrum or unlicensed spectrum. In other words, the new frequency band includes dedicated spectrum and shared spectrum. The subcarrier spacing considered in the new frequency band may be larger than that supported by the existing NR system, for example, the subcarrier spacing may be 480kHz or 960kHz.

In order to better understand the embodiments of the present application, the synchronization in the NR-NTN and IoT-NTN systems related to the present application will be described.

In an NTN system, a network device needs to send synchronization assistance information to a terminal device, where the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization. The information acquired by the terminal device according to the synchronization assistance information includes at least one of the following: ephemeris information, public timing value, and offset value of the public timing value (for example, the first derivative of the public timing value and/or the second derivative of the public timing value) , public transmission delay, reference time t0 (epoch time), and reference point position.

The terminal device completes the corresponding time domain and/or frequency domain synchronization according to the information obtained by the synchronization assistance information and its own Global Navigation Satellite System (Global Navigation Satellite System, GNSS) capability. The terminal device may obtain at least one of the following information based on its GNSS capabilities: the terminal device's location, time reference and frequency reference. Moreover, based on the above information and the information obtained from the synchronization assistance information, the terminal device can calculate timing and/or frequency offset, and apply timing advance compensation and/or frequency offset adjustment in idle state or inactive state or connected state.

Since the synchronization assistance information will change with time, in NR-NTN and IoT-NTN systems, one or more timers need to be configured for the terminal device, and one or more timers can be used for the terminal device to determine the acquisition Whether the sync assistance information for is valid.

For example, the ephemeris information corresponds to the first timer. After the terminal device starts or restarts the first timer, the terminal device may determine that the ephemeris information acquired by the terminal device is valid before the first timer expires.

For another example, the public timing value and/or the offset value of the public timing value corresponds to the second timer. After the terminal device starts or restarts the second timer, the terminal device may determine that the public timing value acquired by the terminal device is valid before the second timer expires.

For another example, the validity period of uplink synchronization corresponds to the third timer. After the terminal device starts or restarts the third timer, the terminal device may determine that the uplink synchronization validity period of the terminal device is valid before the third timer expires.

For another example, GNSS corresponds to the fourth timer. After the terminal device starts or restarts the fourth timer, the terminal device may determine that the information acquired by the terminal device according to the GNSS, such as the position, time reference or frequency reference of the terminal device, is valid before the fourth timer expires.

For another example, the common transmission delay corresponds to the fifth timer. After the terminal device starts or restarts the fifth timer, the terminal device may determine that the public transmission delay acquired by the terminal device is valid before the fifth timer expires.

It should be understood that the first timer to the fifth timer above can be the same timer, or correspond to the same timer length; they can also be different timers or correspond to different timer lengths; or the first timer to the fifth timer Some of the five timers are the same timer or correspond to the same timer length. Of course, the above partial information may not correspond to the timer.

In addition, in the NR system or IoT system, the network device can configure an uplink synchronization timer for the terminal device to maintain uplink timing synchronization, wherein the uplink synchronization timer is used to control how long the MAC entity will consider the uplink synchronization timer The uplink of the serving cell associated with the corresponding timing advance group (Timing Advance Group, TAG) is synchronized in timing. The uplink synchronization timer is generally also applicable to the corresponding NTN system.

In order to better understand the embodiments of the present application, the cell access in the NR system related to the present application will be described.

In an NR system, a terminal device may request on demand system information and/or request on demand positioning (positioning) system information.

In the process of requesting on demand system information, if the system scheduling information (such as si-SchedulingInfo) included in the system information block 1 (System Information Block 1, SIB1) includes supplementary uplink (supplementary uplink, SUL) cell system information request configuration ( For example, si-RequestConfigSUL), and meet the selection criteria of the supplementary uplink cell, and meet the random access process initialization conditions, then the terminal device should trigger the bottom layer to initiate a random access process on the supplementary uplink cell, wherein the random access process uses The physical random access channel (Physical Random Access Channel, PRACH) sequence and PRACH resources are provided in the supplementary uplink cell system information request configuration (such as si-RequestConfigSUL); if the bottom layer of the terminal device receives system information (System Information, SI) request corresponding acknowledgment (Acknowledgment, ACK) information, then the terminal device should obtain the requested SI message immediately. Otherwise, if the system scheduling information (such as si-SchedulingInfo) included in SIB1 includes the normal uplink (normal uplink) cell system information request configuration (such as si-RequestConfig), and meets the normal uplink cell selection criteria, and meets the random access procedure initialization condition, then the terminal device should trigger the bottom layer to initiate a random access process on the normal uplink cell, wherein the PRACH sequence and PRACH resources used in the random access process are the system information request configuration (such as si-RequestConfig) of the normal uplink cell Provided in ; if the bottom layer of the terminal device receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

In the process of requesting on demand positioning system information, if the positioning system scheduling information (such as posSI-SchedulingInfo) included in SIB1 includes the supplementary uplink (SUL) cell positioning system information request configuration (such as posSI-RequestConfigSUL), and the supplementary uplink cell selection criteria and meet the random access process initialization conditions, then the terminal device should trigger the bottom layer to initiate a random access process on the supplementary uplink cell, where the PRACH sequence and PRACH resources used in the random access process are the supplementary uplink cell Provided in the positioning system information request configuration (such as posSI-RequestConfigSUL); if the bottom layer of the terminal device receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message. Otherwise, if the positioning system scheduling information (such as posSI-SchedulingInfo) included in SIB1 includes the normal uplink (normal uplink) cell positioning system information request configuration (such as posSI-RequestConfig), and meets the normal uplink cell selection criteria, and meets the random access entry procedure initialization condition, then the terminal device should trigger the bottom layer to initiate a random access procedure on the normal uplink cell, wherein the PRACH sequence and PRACH resources used in the random access procedure are the normal uplink cell positioning system information request configuration (such as posSI -RequestConfig); if the bottom layer of the terminal device receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

In order to better understand the embodiments of this application, the cell access in the IoT system related to this application will be described.

In the IoT system, after obtaining system information, the terminal device can initiate Radio Resource Control (RRC) connection establishment (RRC connection establishment) or RRC connection resume (RRC connection resume) or RRC connection re-establishment (RRC connection re-establishment) -establishment), or, initiate an early data transmission (Early Data Transmission, EDT); or initiate a transmission using a preconfigured uplink resource (PUR).

In some embodiments, the terminal device needs to meet at least one of the following conditions when initiating EDT:

The establishment or recovery request is for mobile originating calls and the establishment reason is mobile originating data (mo-Data) or mobile originating exception data (mo-ExceptionData) or delay tolerant access (delayTolerantAccess);

The establishment or recovery request is for mobile terminating calls, the terminal device has a stored mobile terminating call EDT (mt-EDT) indication, and the establishment reason is mobile terminating call access (mt-Access);

Establishment or restoration requests apply to EDT;

System messages such as System Information Block Type 2 (System Information Block Type 2) in Enhanced Machine Type Communication (Enhanced Machine Type Communication, eMTC) or System Information Block Type 2-NB in Narrow Band Internet of Things (NB-IoT) (SystemInformationBlockType2-NB) includes EDT parameters (eg edt-Parameters);

For the mobile calling process, the total size of uplink data included in the Media Access Control Protocol Data Unit (Media Access Control Protocol Data Unit, MAC PDU) should be less than or equal to the transport block indicated in the EDT transport block size (edt-TBS) size (Transport block size, TBS);

For the current establishment or restoration process, the bottom layer of the terminal device does not receive an EDT fallback indication (fallback indication).

In some embodiments, at least one of the following conditions must be met for the terminal device to initiate a transmission using PUR:

The terminal device has a valid PUR configuration for the serving cell;

The end device has a valid timing alignment value;

The upper layer requests the establishment of an RRC connection or the upper layer requests the recovery of an RRC connection, and the terminal device stores the next hop provided in the RRC Connection Release (RRCConnectionRelease) message associated with the suspend indication (suspend indication) during the previous suspension process count(nextHopChainingCount) value;

For control plane (CP) transmission using PUR, the total size of uplink data included in the MAC PDU shall be less than or equal to the TBS configured for PUR.

In order to better understand the embodiments of the present application, the technical problems solved in the present application will be described.

In the NTN system, the terminal device needs to acquire the synchronization assistance information of the network device before it can complete time domain and/or frequency domain synchronization, so as to perform uplink transmission. Therefore, in the NR-NTN system and the IoT-NTN system, the cell access process also needs to be enhanced accordingly.

Based on the above problems, this application proposes a solution to enhance the cell access process in the NR-NTN system and the IoT-NTN system, by limiting the acquisition of synchronization assistance information and/or Or the condition of the timing advance value can enable the terminal device to perform uplink transmission after completing time domain and/or frequency domain synchronization, so as to avoid uplink out-of-synchronization of the terminal device.

The technical scheme of the present application is described in detail below through specific examples.

Fig. 2 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. As shown in Fig. 2, the wireless communication method 200 may include at least some of the following contents:

S210, the terminal device meets at least one of the following conditions when initiating the first process:

The terminal equipment obtains the synchronization assistance information before the first procedure; the terminal equipment acquires the synchronization assistance information during the first procedure; the terminal equipment acquires a timing advance value before the first procedure; the terminal equipment acquires the synchronization assistance information before the first procedure; Obtain the timing advance value during the process;

Wherein, the synchronization assistance information is used for the terminal equipment to complete time domain and/or frequency domain synchronization; wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link;

Optionally, the first process may be a process of accessing a cell.

The embodiments of the present application may be applied to an NTN system, for example, an NR-NTN system and/or an IoT-NTN system.

It should be noted that the service link may be a link between a terminal device and a satellite, and the feeder link may be a link between a satellite and a reference point or between a satellite and a network device.

In some embodiments, the timing advance value of the service link is the timing advance value corresponding to the link between the terminal device and the satellite; and/or, the timing advance value of the feeder link is the link between the satellite and the reference point The corresponding timing advance value.

In some embodiments, the timing advance value may be a timing advance (Timing Advance, TA).

In some embodiments, in the NR-NTN system, the first process includes at least one of the following: requesting on demand (on demand) system information, requesting on demand (on demand) positioning (positioning) system information.

In some embodiments, in the IoT-NTN system, the first process includes at least one of the following: initiating RRC connection establishment (RRC connection establishment), initiating RRC connection recovery (RRC connection resume), initiating RRC connection re-establishment (RRC connection re-establishment), initiate early data transmission (Early Data Transmission, EDT), initiate transmission using preconfigured uplink resource (PUR).

In some embodiments, the synchronization assistance information includes but is not limited to at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.

Specifically, for example, the reference time included in the synchronization assistance information may be a reference time t0 (epoch time).

In some embodiments, the ephemeris information includes satellite position, velocity and time state (Position Velocity Time, PVT) vector information.

In some embodiments, the ephemeris information is sent in an ephemeris information format, and the ephemeris information format sent by the network device may include at least one of the following two methods:

Method 1: Ephemeris information format based on orbit information. In this manner, the network device broadcasts the ephemeris parameters (α(km), e, I(deg), Ω(deg), ω(deg), M(deg)) at time t0.

Mode 2: ephemeris information format based on instantaneous state vector. In this manner, the network device broadcasts the satellite's PVT vectors (SX, SY, SZ, VX, VY, VZ) based on the geocentric coordinate system at time t0 to the terminal device.

In some embodiments, the common timing value (Common TA) can be, for example, the timing value between the network device and the reference point, and/or, the timing value between the network device and the satellite, and/or, the timing value between the satellite and the reference point Timing value between.

In some embodiments, the offset value (Common TA drift) of the common timing value may be, for example, the first order derivative of the common timing value, and/or, the second order derivative of the common timing value.

In some embodiments, the common delay (Common delay) can be, for example, the transmission delay between the network device and the reference point, and/or, the transmission delay between the network device and the satellite, and/or, the satellite and Transmission delay between reference points.

In some embodiments, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization, including:

The synchronization assistance information is used for the terminal equipment to acquire the timing advance value (the timing advance value of the serving link and/or the timing advance value of the feeder link). and performing time domain and/or frequency domain synchronization based on the timing advance value. That is, in the embodiment of the present application, the terminal device may acquire a timing advance value based on the synchronization assistance information, and complete time domain and/or frequency domain synchronization based on the timing advance value.

Specifically, for example, the terminal device can complete the corresponding time-domain and / or frequency domain synchronization. For example, the terminal device may obtain at least one of the following information based on its GNSS capability: location of the terminal device, time reference, frequency reference. Moreover, based on the above information (ie, the location of the terminal device, time reference, frequency reference, etc.), and information obtained from the synchronization assistance information, the terminal device can calculate timing and/or frequency offset, and Timing Advance Compensation and/or Frequency Offset Adjustment are applied in an active state.

In some embodiments, the synchronization assistance information includes a public timing value and/or an offset value of the public timing value, and the public timing value and/or an offset value of the public timing value are obtained based on the first configuration information.

Specifically, for example, the first configuration information may be a system message (such as a first system message), and the first configuration information may also be RRC signaling or a Media Access Control Control Element (Media Access Control Control Element, MAC CE).

In some embodiments, the first configuration information corresponds to a first reference time, the first reference time is determined based on the first time unit for transmitting the first system message, and the first time unit is determined based on the first timing unit of time.

In some embodiments, the first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.

Specifically, for example, the downlink timing of the network device, the downlink timing of the reference point, the downlink timing of the satellite, and the downlink timing of the terminal device may be as shown in FIG. 3 .

In some embodiments, the synchronization assistance information includes ephemeris information, and the ephemeris information is obtained based on the second configuration information.

Specifically, for example, the second configuration information may be a system message (such as a second system message), and the second configuration information may also be RRC signaling or MAC CE.

In some embodiments, the second configuration information corresponds to a second reference time, the second reference time is determined based on the second time unit for transmitting the second system message, and the second time unit is determined based on the second timing unit of time.

In some embodiments, the second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.

In some embodiments, the synchronization assistance information is obtained based on a first system message and a second system message, where the first system message corresponds to a first reference time, and the second system message corresponds to a second reference time.

In some embodiments, the first reference moment is different from the second reference moment, or the first time sequence corresponding to the first reference moment is different from the second time sequence corresponding to the second reference moment.

In some embodiments, the first reference moment and the second reference moment are the same moment, or the first time sequence corresponding to the first reference moment is the same as the second time sequence corresponding to the second reference moment.

In some embodiments, the terminal device receives the first information sent by the network device;

Wherein, the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

The terminal device obtains a timing advance value before the first process;

The terminal device acquires the timing advance value in the first process.

In some embodiments, the first information is carried by one of the following:

The third system message, RRC signaling, downlink control information (Downlink Control Information, DCI), MAC CE.

For example, the terminal device receives the third system message sent by the network device, and determines that the current network is the NTN network according to the first information in the third system message, so the terminal device can determine that when initiating the first procedure Meet at least one of the following conditions:

The terminal device obtains a timing advance value before the first process;

The terminal device acquires the timing advance value in the first process.

The technical solution of the wireless communication method 200 in this application is described in detail below through Embodiment 1 to Embodiment 4.

Embodiment 1, the terminal device requests on-demand system information, that is, the first process is to request on-demand system information. The synchronization assistance information and/or the timing advance value are obtained before the on-demand system information is requested, or the synchronization assistance information and/or the timing advance value are obtained during the request for the on-demand system information.

In an implementation of Embodiment 1, during the process of requesting on demand system information, if the system scheduling information included in SIB1, such as si-SchedulingInfo, includes supplementary uplink (supplementary uplink, SUL) cell system information request configuration such as si- RequestConfigSUL, and meet the supplementary uplink cell selection criteria, and meet the random access process initialization conditions, and the terminal device has obtained the synchronization assistance information sent by the network device, and/or, the terminal device has estimated (or obtained) the timing of the serving link advance value and/or the timing advance value of the feeder link, then the terminal device should trigger the bottom layer to initiate a random access procedure on the supplementary uplink cell, where the PRACH sequence and PRACH resources used in the random access procedure are the supplementary uplink cell The system information request configuration is provided in si-RequestConfigSUL, for example; if the bottom layer receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

In another implementation of Embodiment 1, during the process of requesting on demand system information, if the system scheduling information included in SIB1, such as si-SchedulingInfo, includes normal uplink cell system information request configuration such as si-RequestConfig , and meet the normal uplink cell selection criteria, and meet the initialization conditions of the random access procedure, and the terminal device has obtained the synchronization assistance information sent by the network device, and/or, the terminal device has estimated (or obtained) the timing advance of the serving link value and/or the timing advance value of the feeder link, then the terminal device should trigger the bottom layer to initiate a random access procedure on the normal uplink cell, where the PRACH sequence and PRACH resources used in the random access procedure are the normal uplink cell system The information request configuration is provided in si-RequestConfig, for example; if the bottom layer receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

Embodiment 2, the terminal device requests on-demand positioning system information, that is, the first process is to request on-demand positioning system information. Acquire the synchronization assistance information and/or the timing advance value before requesting the on-demand positioning system information, or acquire the synchronization assistance information and/or the timing advance value in the request for the on-demand positioning system information.

In an implementation of Embodiment 2, during the process of requesting on demand positioning system information, if the system scheduling information included in SIB1, such as posSI-SchedulingInfo, includes supplementary uplink (supplementary uplink) cell system information request configuration such as posSI-RequestConfigSUL , and meet the selection criterion of the supplementary uplink cell, and satisfy the initialization condition of the random access procedure, and the terminal device obtains the synchronization assistance information sent by the network device, and/or, the terminal device estimates (or obtains) the timing advance of the serving link value and/or the timing advance value of the feeder link, then the terminal device should trigger the bottom layer to initiate a random access procedure on the supplementary uplink cell, where the PRACH sequence and PRACH resources used in the random access procedure are the supplementary uplink cell system The information request configuration is provided in posSI-RequestConfigSUL, for example; if the bottom layer receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

In another implementation of Embodiment 2, during the process of requesting on demand positioning system information, if the system scheduling information included in SIB1, such as posSI-SchedulingInfo, includes normal uplink cell system information request configuration such as posSI-SchedulingInfo RequestConfig, and meet the normal uplink cell selection criteria, and meet the initialization conditions of the random access process, and the terminal device has obtained the synchronization assistance information sent by the network device, and/or, the terminal device has estimated (or obtained) the timing of the serving link advance value and/or the timing advance value of the feeder link, then the terminal device should trigger the bottom layer to initiate a random access procedure on the normal uplink cell, wherein the PRACH sequence and PRACH resources used in the random access procedure are the normal uplink cell The system information request configuration is provided in posSI-RequestConfig, for example; if the bottom layer receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message.

Embodiment 3, the terminal device initiates the EDT, that is, the first process is to initiate the EDT. Obtain synchronization assistance information and/or timing advance values before initiating EDT.

In Embodiment 3, in the NTN system, at least one of the following conditions must be met for the terminal device to initiate the EDT:

Obtained the synchronization auxiliary information sent by the network device;

Estimating (or obtaining) the timing advance value of the serving link and/or the timing advance value of the feeder link;

Establishment or restoration requests apply to EDT;

System information such as system information block type 2 (SystemInformationBlockType2) in eMTC or narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT) in system information block type 2-NB (SystemInformationBlockType2-NB) includes EDT parameters (such as edt- Parameters);

For the mobile calling process, the total size of uplink data included in the MAC PDU should be less than or equal to the TBS indicated in EDTTBS (edt-TBS);

Optionally, in Embodiment 3, all the above conditions need to be met for the terminal device to initiate the EDT.

In Embodiment 4, the terminal device initiates the transmission using the PUR, that is, the first process is to initiate the transmission using the PUR. Synchronization assistance information and/or timing advance values are acquired prior to initiating transmissions using PUR.

In Embodiment 4, in the NTN system, at least one of the following conditions must be met when the terminal device initiates a transmission using PUR:

Obtained the synchronization auxiliary information sent by the network device;

The terminal device has a valid PUR configuration for the serving cell;

The end device has a valid timing alignment value;

Optionally, in Embodiment 4, all the above conditions need to be met before the terminal device initiates the transmission using the PUR.

Therefore, in this embodiment of the application, the terminal device meets at least one of the following conditions when initiating the first process: the terminal device obtains the synchronization assistance information before the first process, the terminal device obtains the synchronization assistance information during the first process, The terminal device obtains the timing advance value before the first process, and the terminal device obtains the timing advance value during the first process; wherein the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating RRC connection establishment, RRC connection recovery initiation, RRC connection re-establishment initiation, EDT initiation, transmission using PUR initiation. In addition, by limiting the conditions for obtaining synchronization assistance information and/or timing advance values during the process of terminal equipment accessing the cell, the terminal equipment can perform uplink transmission after completing time domain and/or frequency domain synchronization, avoiding the need for terminal equipment to uplink out of step.

The terminal-side embodiment of the present application is described in detail above in conjunction with FIG. 2 to FIG. 3 , and the network-side embodiment of the present application is described in detail below in conjunction with FIG. 4 . It should be understood that the network-side embodiment and the terminal-side embodiment correspond to each other. For similar descriptions, reference may be made to the terminal-side embodiments.

FIG. 4 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. As shown in FIG. 4 , the wireless communication method 300 may include at least part of the following content:

S310. The network device sends first information to the terminal device, where the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

In this embodiment of the present application, the first process may be a process of accessing a cell.

It should be noted that the service link may be a link between a terminal device and a satellite, and the feeder link may be a link between a satellite and a reference point (such as an NTN gateway).

In some embodiments, the timing advance value may be a timing advance (TA).

In some embodiments, in the NR-NTN system, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information.

In some embodiments, in the IoT-NTN system, the first procedure includes at least one of: initiating RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating EDT, initiating transmission using PUR.

In some embodiments, the first information may be carried by at least one of the following:

The third system message, RRC signaling, DCI, MAC CE.

The terminal device obtains a timing advance value before the first process;

The terminal device obtains the timing advance value in the first process.

The synchronization assistance information is used for the terminal equipment to acquire the timing advance value (the timing advance value of the serving link and/or the timing advance value of the feeder link). and performing time domain and/or frequency domain synchronization based on the timing advance value. That is, in this embodiment of the present application, the terminal device may acquire a timing advance value based on the synchronization assistance information, and complete time domain and/or frequency domain synchronization based on the timing advance value.

In some embodiments, the synchronization assistance information includes a public timing value and/or an offset value of the public timing value, and the public timing value and/or an offset value of the public timing value are acquired based on the first configuration information.

Specifically, for example, the first configuration information may be a system message (such as a first system message), and the first configuration information may also be RRC signaling or MAC CE.

Therefore, in this embodiment of the application, the terminal device meets at least one of the following conditions when initiating the first process: the terminal device obtains the synchronization assistance information before the first process, the terminal device obtains the synchronization assistance information during the first process, The terminal device obtains the timing advance value before the first process, and the terminal device obtains the timing advance value during the first process; wherein the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating RRC connection establishment, RRC connection recovery initiation, RRC connection re-establishment initiation, EDT initiation, transmission using PUR initiation. In addition, by limiting the conditions for acquiring synchronization assistance information and/or timing advance values during the process of terminal equipment accessing the cell, the terminal equipment can perform uplink transmission after completing time domain and/or frequency domain synchronization, avoiding the need for terminal equipment to uplink out of step.

FIG. 5 is a schematic flowchart of a wireless communication method 400 according to an embodiment of the present application. As shown in FIG. 5 , the wireless communication method 400 may include at least part of the following content:

S410, the terminal device initiates a second process, where the second process is used to request system information carrying synchronization assistance information;

In this embodiment of the present application, the terminal device may request the network device for system information carrying synchronization assistance information.

In some embodiments, the second procedure comprises a random access procedure. For example, the second process is a random access process. Certainly, the second process may also be some other processes, which is not limited in this application.

In some embodiments, the terminal device initiates the second procedure before the target timer expires, or the terminal device initiates the second procedure after the target timer expires.

In some embodiments, the target timer includes but is not limited to at least one of the following:

Timers corresponding to ephemeris information, timers corresponding to public timing values, timers corresponding to offset values of public timing values, timers corresponding to uplink synchronization validity period, timers corresponding to GNSS, timers corresponding to public transmission delay , uplink synchronization timer.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the ephemeris information, the terminal device may determine that the ephemeris information acquired by the terminal device is valid before the timer corresponding to the ephemeris information expires.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the public timing value, the terminal device may determine that the public timing value acquired by the terminal device is valid before the timer corresponding to the public timing value expires.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the offset value of the public timing value, the terminal device can determine the offset value of the public timing value acquired by the terminal device before the timer corresponding to the offset value of the public timing value expires. The shift is valid.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the uplink synchronization validity period, the terminal device may determine that the uplink synchronization validity period of the terminal device is valid before the timer corresponding to the uplink synchronization validity period expires.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the GNSS, the terminal device may determine that the information obtained by the terminal device according to the GNSS, such as the position, time reference or frequency reference of the terminal device, is valid before the timer corresponding to the GNSS expires.

Specifically, for example, after the terminal device starts or restarts the timer corresponding to the public transmission delay, the terminal device may determine that the public transmission delay acquired by the terminal device is valid before the timer corresponding to the public transmission delay expires.

Specifically, for example, after the terminal device starts or restarts the uplink synchronization timer, the terminal device may determine that before the uplink synchronization timer expires, the terminal device considers that the uplink of the serving cell associated with the TAG corresponding to the uplink synchronization timer is timing synchronized.

It should be understood that each timer included in the above-mentioned target timer may be the same timer, or correspond to the same timer length; it may also be a different timer or correspond to a different timer length; or, the above-mentioned target timer includes Some timers are the same timer or correspond to the same timer length. Of course, some of the timers included in the above-mentioned target timer may not correspond to timers.

In some embodiments, when the terminal device is configured with both the timer corresponding to the uplink synchronization validity period and the uplink synchronization timer, the terminal device may consider that only one of the timer corresponding to the uplink synchronization validity period and the uplink synchronization timer When it expires, the uplink synchronization of the terminal device becomes invalid. Optionally, in this case, the behavior of the terminal device when the timer corresponding to the uplink synchronization validity period expires is different from the behavior of the terminal device when the uplink synchronization timer expires; or, the behavior of the terminal device when the timer corresponding to the uplink synchronization validity period expires The behavior of the end-device is the same as when the uplink synchronization timer expires.

In some implementation manners, after the uplink synchronization timer expires, the terminal device initiates the second process.

In some implementation manners, after the timer corresponding to the uplink synchronization valid period expires, the terminal device initiates the second process.

In some implementation manners, after the timer corresponding to the GNSS expires, the terminal device initiates the second process.

In some implementation manners, after the uplink synchronization timer expires and before the timer corresponding to the uplink synchronization validity period expires, the terminal device initiates the second process.

In some implementation manners, after the timer corresponding to the uplink synchronization valid period expires and before the uplink synchronization timer expires, the terminal device initiates the second process.

In some implementation manners, after the timer corresponding to the uplink synchronization validity period expires and before the timer corresponding to the GNSS expires, the terminal device initiates the second process.

In some embodiments, after the second process is completed, the terminal device acquires the system information carrying the synchronization assistance information.

In some embodiments, the terminal device obtains the timing advance value before the second process; or, the terminal device obtains the timing advance value during the second process.

In some embodiments, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link.

For example, the terminal device estimates the TA of the serving link, and then initiates the second process, in which the first system message (common TA, etc.) is requested.

For another example, the terminal device estimates the TA of the feeder link, and then initiates the second process, in which the second system message (ephemera information) is requested.

In some embodiments, the synchronization assistance information includes at least one of the following:

In some embodiments, the ephemeris information includes satellite position, velocity and time status (Position Velocity Time, PVT) vector information.

Specifically, for example, the terminal device can complete the corresponding time-domain and /or frequency domain synchronization. For example, the terminal device may obtain at least one of the following information based on its GNSS capability: location of the terminal device, time reference, frequency reference. Moreover, based on the above information (ie, the location of the terminal device, time reference, frequency reference, etc.), and information obtained from the synchronization assistance information, the terminal device can calculate timing and/or frequency offset, and Timing Advance Compensation and/or Frequency Offset Adjustment are applied in an active state.

The technical solution of the wireless communication method 300 in this application is described in detail below through a specific embodiment.

In the process of requesting system information carrying synchronization assistance information, if the system scheduling information included in SIB1, such as si-SchedulingInfo, includes supplementary uplink (supplementary uplink) cell system information request configuration, such as si-RequestConfigSUL, and meets the selection criteria for supplementary uplink cells , and the random access procedure initialization condition is met, then the terminal device should trigger the bottom layer to initiate a random access procedure on the supplementary uplink cell, where the PRACH sequence and PRACH resources used in the random access procedure are the supplementary uplink cell system information request The configuration is provided in si-RequestConfigSUL, for example; if the bottom layer receives the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message, where the SI message includes system information carrying synchronization assistance information. Or, if the system scheduling information included in SIB1, such as si-SchedulingInfo, includes a normal uplink (normal uplink) cell system information request configuration such as si-RequestConfig, and satisfies the selection criteria of the normal uplink cell, and satisfies the initialization condition of the random access procedure, then The terminal device should trigger the bottom layer to initiate a random access process on the normal uplink cell, wherein the PRACH sequence and PRACH resources used in the random access process are provided in the system information request configuration of the normal uplink cell, such as si-RequestConfig; if the bottom layer After receiving the ACK information corresponding to the SI request, the terminal device should immediately obtain the requested SI message, wherein the SI message includes system information carrying synchronization assistance information.

In some implementations, before the above process of requesting system information carrying synchronization assistance information, or during the above process of requesting system information carrying synchronization assistance information, the terminal device needs to estimate or obtain the timing advance value and and/or the timing advance value of the feeder link.

In some implementations, before the above process of requesting system information carrying synchronization assistance information, or during the above process of requesting system information carrying synchronization assistance information, the terminal device needs to estimate or obtain the timing advance value of the serving link. In this case, the synchronization assistance information includes at least one of the following: a public timing value, an offset value of the public timing value, a public transmission delay, a reference time t0 (epoch time), and a reference point position. Optionally, the synchronization assistance information does not include ephemeris information.

In some implementations, before the above process of requesting system information carrying synchronization assistance information, or during the above process of requesting system information carrying synchronization assistance information, the terminal device needs to estimate or acquire the timing advance value of the feeder link. In this case, the synchronization assistance information includes at least one of the following: ephemeris information, public transmission delay, reference time t0 (epoch time), and reference point position. Optionally, the synchronization assistance information does not include the public timing value and the offset value of the public timing value.

In some implementation manners, before the target timer expires or after the target timer expires, the terminal device may request the network device for system information carrying the synchronization assistance information.

In some implementations, the target timer includes but is not limited to at least one of the following:

In some implementation manners, after the uplink synchronization timer expires, the terminal device may request the network device for system information carrying synchronization assistance information.

In some implementations, after the timer corresponding to the uplink synchronization validity period expires, the terminal device may request the network device for system information carrying synchronization assistance information.

In some implementation manners, after the timer corresponding to the GNSS expires, the terminal device may request the network device for system information carrying synchronization assistance information.

In some implementation manners, after the uplink synchronization timer expires and before the timer corresponding to the uplink synchronization validity period expires, the terminal device may request the network device for system information carrying synchronization assistance information.

In some implementation manners, after the timer corresponding to the uplink synchronization validity period expires and before the uplink synchronization timer expires, the terminal device may request the network device for system information carrying synchronization assistance information.

In some implementation manners, after the timer corresponding to the uplink synchronization valid period expires and before the timer corresponding to the GNSS expires, the terminal device may request the network device for system information carrying synchronization assistance information.

Therefore, in the embodiment of the present application, the terminal device initiates the second process, so as to acquire system information carrying synchronization assistance information, and the terminal device may complete time domain and/or frequency domain synchronization based on the synchronization assistance information. It is possible to enable the terminal equipment to perform uplink transmission after completing time domain and/or frequency domain synchronization, so as to avoid uplink out-of-synchronization of the terminal equipment.

The terminal-side embodiment of the present application is described in detail above in conjunction with FIG. 5 , and the network-side embodiment of the present application is described in detail below in conjunction with FIG. 6 . It should be understood that the network-side embodiment and the terminal-side embodiment correspond to each other, and similar descriptions You can refer to the embodiment on the terminal side.

FIG. 6 is a schematic flowchart of a wireless communication method 500 according to an embodiment of the present application. As shown in FIG. 6, the wireless communication method 500 may include at least part of the following content:

S510, the network device sends system information carrying synchronization assistance information to the terminal device after a second process initiated by the terminal device, where the second process is used to request system information carrying synchronization assistance information; where the synchronization assistance information is used for the The terminal device completes time domain and/or frequency domain synchronization.

The method embodiment of the present application is described in detail above in conjunction with FIG. 2 to FIG. 6 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 7 to FIG. 10 . It should be understood that the device embodiment and the method embodiment correspond to each other, similar to The description can refer to the method embodiment.

Fig. 7 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application. As shown in FIG. 7, the terminal device 600 includes: a first communication unit 610 and a second communication unit 620;

The first communication unit 610 acquires synchronization assistance information before the first process;

The first communication unit 610 obtains the synchronization assistance information in the first process;

The second communication unit 620 acquires a timing advance value before the first process;

The second communication unit 620 acquires the timing advance value in the first process;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating radio resource control RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating early data transmission EDT, Initiate transmission using pre-configured uplink resource PUR.

In some embodiments, the synchronization assistance information includes a public timing value and/or an offset value of the public timing value, and the public timing value and/or an offset value of the public timing value are acquired based on the first system message.

In some embodiments, the first system message corresponds to a first reference time, the first reference time is determined based on the first time unit for transmitting the first system message, and the first time unit is determined based on the first timing time unit;

The first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.

In some embodiments, the synchronization assistance information includes ephemeris information, and the ephemeris information is obtained based on the second system message.

In some embodiments, the second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is determined based on a second sequence time unit;

The second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.

In some embodiments, the first reference time and the second reference time are different times, or,

The first timing corresponding to the first reference moment is different from the second timing corresponding to the second reference moment.

In some embodiments, the timing advance value of the service link is the timing advance value corresponding to the link between the terminal device and the satellite; and/or, the timing advance value of the feeder link is between the satellite and the reference point The corresponding timing advance value of the link.

The synchronization assistance information is used by the terminal device to obtain the timing advance value.

In some embodiments, the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip.

It should be understood that the terminal device 600 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 600 are to realize the method shown in FIG. 2 For the sake of brevity, the corresponding process of the terminal device in 200 will not be repeated here.

Fig. 8 shows a schematic block diagram of a network device 700 according to an embodiment of the present application. As shown in FIG. 8, the network device 700 includes:

The communication unit 710 is configured to send first information to the terminal device, where the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

The terminal device obtains a timing advance value before the first process;

The terminal device acquires the timing advance value in the first process;

In some embodiments, the second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is determined based on a second sequence A time unit; the second timing is one of the following: downlink timing of network equipment, downlink timing of reference points, downlink timing of satellites, and downlink timing of terminal equipment.

It should be understood that the network device 700 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 700 are for realizing the method shown in FIG. 4 For the sake of brevity, the corresponding processes of the network devices in 300 will not be repeated here.

FIG. 9 shows a schematic block diagram of a terminal device 800 according to an embodiment of the present application. As shown in FIG. 9, the terminal device 800 includes:

The processing unit 810 is configured to initiate a second process, where the second process is used to request system information carrying synchronization assistance information;

In some embodiments, the processing unit 810 is specifically used for:

The second process is initiated before the target timer expires, or the second process is initiated after the target timer expires.

In some embodiments, the target timer includes at least one of the following: a timer corresponding to ephemeris information, a timer corresponding to a public timing value, a timer corresponding to an offset value of a public timing value, and a timing corresponding to an uplink synchronization validity period Device, timer corresponding to GNSS, timer corresponding to public transmission delay, uplink synchronization timer.

In some embodiments, the terminal device obtains the timing advance value before the second process; or, the terminal device obtains the timing advance value during the second process;

Wherein, the timing advance value includes the timing advance value of the serving link and/or the timing advance value of the feeder link.

In some embodiments, the second procedure comprises a random access procedure.

In some embodiments, the terminal device 800 further includes: a communication unit 820;

After the second process is completed, the communication unit 820 is configured to obtain the system information carrying the synchronization assistance information.

In some embodiments, the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip. The aforementioned processing unit may be one or more processors.

It should be understood that the terminal device 800 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 800 are for realizing the method shown in FIG. 5 For the sake of brevity, the corresponding process of the terminal device in 400 will not be repeated here.

Fig. 10 shows a schematic block diagram of a network device 900 according to an embodiment of the present application. As shown in FIG. 10, the network device 900 includes:

The communication unit 910 is configured to send system information carrying synchronization assistance information to the terminal device after a second process initiated by the terminal device, where the second process is used to request system information carrying synchronization assistance information;

In some embodiments, the second process is initiated by the terminal device before the target timer expires, or the second process is initiated by the terminal device after the target timer expires.

In some embodiments, the second procedure comprises a random access procedure.

It should be understood that the network device 900 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 900 are for realizing the method shown in FIG. 6 For the sake of brevity, the corresponding processes of the network devices in 500 are not repeated here.

Fig. 11 is a schematic structural diagram of a communication device 1000 provided by an embodiment of the present application. The communication device 1000 shown in FIG. 11 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

In some embodiments, as shown in FIG. 11 , the communication device 1000 may further include a memory 1020 . Wherein, the processor 1010 can invoke and run a computer program from the memory 1020, so as to implement the method in the embodiment of the present application.

Wherein, the memory 1020 may be an independent device independent of the processor 1010 , or may be integrated in the processor 1010 .

In some embodiments, as shown in FIG. 11 , the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, to send information or data to other devices, or Receive messages or data from other devices.

Wherein, the transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include antennas, and the number of antennas may be one or more.

In some embodiments, the communication device 1000 may specifically be the network device in the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.

In some embodiments, the communication device 1000 may specifically be the terminal device in the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. Let me repeat.

Fig. 12 is a schematic structural diagram of a device according to an embodiment of the present application. The apparatus 1100 shown in FIG. 12 includes a processor 1110, and the processor 1110 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

In some embodiments, as shown in FIG. 12 , the device 1100 may further include a memory 1120 . Wherein, the processor 1110 can invoke and run a computer program from the memory 1120, so as to implement the method in the embodiment of the present application.

Wherein, the memory 1120 may be an independent device independent of the processor 1110 , or may be integrated in the processor 1110 .

In some embodiments, the device 1100 may further include an input interface 1130 . Wherein, the processor 1110 can control the input interface 1130 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

In some embodiments, the device 1100 may further include an output interface 1140 . Wherein, the processor 1110 can control the output interface 1140 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

In some embodiments, the device can be applied to the network device in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.

In some embodiments, the device can be applied to the terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here.

In some embodiments, the device mentioned in the embodiment of the present application may also be a chip. For example, it may be a system-on-a-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.

Fig. 13 is a schematic block diagram of a communication system 1200 provided by an embodiment of the present application. As shown in FIG. 13 , the communication system 1200 includes a terminal device 1210 and a network device 1220 .

Wherein, the terminal device 1210 can be used to realize the corresponding functions realized by the terminal device in the above method, and the network device 1220 can be used to realize the corresponding functions realized by the network device in the above method. repeat.

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM ) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above-mentioned memory is illustrative but not restrictive. For example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

In some embodiments, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.

In some embodiments, the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.

The embodiment of the present application also provides a computer program product, including computer program instructions.

In some embodiments, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, This will not be repeated here.

In some embodiments, the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application. For brevity, the This will not be repeated here.

The embodiment of the present application also provides a computer program.

In some embodiments, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.

In some embodiments, the computer program can be applied to the terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes the corresponding process implemented by the terminal device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. For such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method for wireless communication, comprising:

The terminal device meets at least one of the following conditions when initiating the first process:

The terminal device acquires synchronization assistance information prior to the first procedure;

The terminal device acquires the synchronization assistance information in the first process;

said terminal device acquires a timing advance value prior to said first procedure;

The terminal device acquires the timing advance value in the first process;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating radio resource control RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating early data transmission EDT . Initiate transmission using the preconfigured uplink resource PUR.
The method according to claim 1, wherein the synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The method according to claim 1 or 2, wherein the synchronization assistance information includes a public timing value and/or an offset value of a public timing value, and the public timing value and/or an offset value of the public timing value The shift value is obtained based on the first system message.
The method of claim 3, wherein

The first system message corresponds to a first reference time, the first reference time is determined based on a first time unit for transmitting the first system message, and the first time unit is a time unit determined based on a first sequence ;

The first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The method according to any one of claims 1 to 4, wherein the synchronization assistance information includes ephemeris information, and the ephemeris information is obtained based on a second system message.
The method of claim 5, wherein,

The second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is a time unit determined based on a second sequence ;

The second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The method according to any one of claims 1 to 6, characterized in that,

The synchronization assistance information is obtained based on a first system message and a second system message, where the first system message corresponds to a first reference time, and the second system message corresponds to a second reference time.
The method of claim 7, wherein

The first reference moment is a different moment than the second reference moment, or,

The first timing corresponding to the first reference moment is different from the second timing corresponding to the second reference moment.
The method according to any one of claims 1 to 8, characterized in that,

The timing advance value of the serving link is a timing advance value corresponding to the link between the terminal device and the satellite; and/or,

The timing advance value of the feeder link is a timing advance value corresponding to the link between the satellite and the reference point.
The method according to any one of claims 1 to 9, wherein the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization, including:

The synchronization assistance information is used by the terminal device to obtain the timing advance value.
A method for wireless communication, comprising:

The terminal device initiates a second process, where the second process is used to request system information carrying synchronization assistance information;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization.
The method according to claim 11, wherein the terminal device initiates the second process, comprising:

The terminal device initiates the second procedure before the target timer expires, or the terminal device initiates the second procedure after the target timer expires.
The method according to claim 12, wherein the target timer comprises at least one of the following:

Timers corresponding to ephemeris information, timers corresponding to public timing values, timers corresponding to offset values of public timing values, timers corresponding to uplink synchronization validity period, timers corresponding to GNSS, public transmission delay The corresponding timer is the uplink synchronization timer.
A method according to any one of claims 11 to 13, wherein

The terminal device obtains a timing advance value before the second procedure; or,

The terminal device acquires the timing advance value in the second process;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link.
A method according to any one of claims 11 to 14, wherein,

The synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The method according to any one of claims 11 to 15, wherein the second procedure comprises a random access procedure.
The method according to any one of claims 11 to 16, further comprising:

After the second process is completed, the terminal device acquires the system information carrying the synchronization assistance information.
A method for wireless communication, comprising:

The network device sends first information to the terminal device, where the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

The terminal device acquires synchronization assistance information prior to the first procedure;

The terminal device acquires the synchronization assistance information in the first process;

said terminal device acquires a timing advance value prior to said first procedure;

The terminal device acquires the timing advance value in the first process;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating radio resource control RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating early data transmission EDT . Initiate transmission using the preconfigured uplink resource PUR.
The method according to claim 18, wherein the synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The method according to claim 18 or 19, wherein the synchronization assistance information includes a public timing value and/or an offset value of a public timing value, and the public timing value and/or an offset value of the public timing value The shift value is obtained based on the first system message.
The method of claim 20, wherein

The first system message corresponds to a first reference time, the first reference time is determined based on a first time unit for transmitting the first system message, and the first time unit is a time unit determined based on a first sequence ;

The first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The method according to any one of claims 18 to 21, wherein the synchronization assistance information includes ephemeris information, and the ephemeris information is acquired based on a second system message.
The method of claim 22, wherein,

The second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is a time unit determined based on a second sequence ;

The second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
A method according to any one of claims 18 to 23, wherein,

The synchronization assistance information is obtained based on a first system message and a second system message, where the first system message corresponds to a first reference time, and the second system message corresponds to a second reference time.
The method of claim 24, wherein

The first reference moment is a different moment than the second reference moment, or,

The first timing corresponding to the first reference moment is different from the second timing corresponding to the second reference moment.
A method according to any one of claims 18 to 25, wherein,

The timing advance value of the serving link is a timing advance value corresponding to the link between the terminal device and the satellite; and/or,

The timing advance value of the feeder link is a timing advance value corresponding to the link between the satellite and the reference point.
The method according to any one of claims 18 to 26, wherein the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization, including:

The synchronization assistance information is used by the terminal device to obtain the timing advance value.
A method for wireless communication, comprising:

The network device sends the system information carrying the synchronization assistance information to the terminal device after the second process initiated by the terminal device, where the second process is used to request the system information carrying the synchronization assistance information;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization.
The method of claim 28, wherein,

The second process is initiated by the terminal device before the target timer expires, or the second process is initiated by the terminal device after the target timer expires.
The method according to claim 29, wherein the target timer comprises at least one of the following:

Timers corresponding to ephemeris information, timers corresponding to public timing values, timers corresponding to offset values of public timing values, timers corresponding to uplink synchronization validity period, timers corresponding to GNSS, public transmission delay The corresponding timer is the uplink synchronization timer.
A method according to any one of claims 28 to 30, wherein,

The terminal device obtains a timing advance value before the second procedure; or,

The terminal device acquires the timing advance value in the second process;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link.
A method as claimed in any one of claims 28 to 31 wherein,

The synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The method according to any one of claims 28 to 32, wherein the second procedure comprises a random access procedure.
A terminal device, characterized by comprising: a first communication unit and a second communication unit;

The terminal device meets at least one of the following conditions when initiating the first process:

the first communication unit acquires synchronization assistance information prior to the first procedure;

The first communication unit acquires the synchronization assistance information in the first process;

said second communication unit acquires a timing advance value prior to said first procedure;

The second communication unit obtains the timing advance value in the first process;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating radio resource control RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating early data transmission EDT . Initiate transmission using the preconfigured uplink resource PUR.
The terminal device according to claim 34, wherein the synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The terminal device according to claim 34 or 35, wherein the synchronization assistance information includes a public timing value and/or an offset value of the public timing value, and the public timing value and/or an offset value of the public timing value The offset value is obtained based on the first system message.
The terminal device according to claim 36, characterized in that,

The first system message corresponds to a first reference time, the first reference time is determined based on a first time unit for transmitting the first system message, and the first time unit is a time unit determined based on a first sequence ;

The first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The terminal device according to any one of claims 34 to 37, wherein the synchronization assistance information includes ephemeris information, and the ephemeris information is acquired based on a second system message.
The terminal device according to claim 38, characterized in that,

The second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is a time unit determined based on a second sequence ;

The second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The terminal device according to any one of claims 34 to 39, characterized in that,

The synchronization assistance information is obtained based on a first system message and a second system message, where the first system message corresponds to a first reference time, and the second system message corresponds to a second reference time.
The terminal device according to claim 40, characterized in that,

The first reference moment is a different moment than the second reference moment, or,

The first timing corresponding to the first reference moment is different from the second timing corresponding to the second reference moment.
The terminal device according to any one of claims 34 to 41, characterized in that,

The timing advance value of the serving link is a timing advance value corresponding to the link between the terminal device and the satellite; and/or,

The timing advance value of the feeder link is a timing advance value corresponding to the link between the satellite and the reference point.
The terminal device according to any one of claims 34 to 42, wherein the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization, including:

The synchronization assistance information is used by the terminal device to obtain the timing advance value.
A terminal device, characterized in that it includes:

a processing unit, configured to initiate a second process, where the second process is used to request system information carrying synchronization assistance information;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization.
The terminal device according to claim 44, wherein the processing unit is specifically used for:

The second process is initiated before the target timer expires, or the second process is initiated after the target timer expires.
The terminal device according to claim 45, wherein the target timer includes at least one of the following:

Timers corresponding to ephemeris information, timers corresponding to public timing values, timers corresponding to offset values of public timing values, timers corresponding to uplink synchronization validity period, timers corresponding to GNSS, public transmission delay The corresponding timer is the uplink synchronization timer.
The terminal device according to any one of claims 44 to 46, characterized in that,

The terminal device obtains a timing advance value before the second procedure; or,

The terminal device acquires the timing advance value in the second process;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link.
The terminal device according to any one of claims 44 to 47, characterized in that,

The synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The terminal device according to any one of claims 44 to 48, wherein the second procedure comprises a random access procedure.
The terminal device according to any one of claims 44 to 49, characterized in that,

The terminal device also includes: a communication unit;

After the second process is completed, the communication unit is configured to acquire the system information carrying the synchronization assistance information.
A network device, characterized in that it includes:

A communication unit, configured to send first information to the terminal device, where the first information is used to indicate that the terminal device meets at least one of the following conditions when initiating the first process:

The terminal device acquires synchronization assistance information prior to the first procedure;

The terminal device acquires the synchronization assistance information in the first process;

said terminal device acquires a timing advance value prior to said first procedure;

The terminal device acquires the timing advance value in the first process;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link;

Wherein, the first process includes at least one of the following: requesting on-demand system information, requesting on-demand positioning system information, initiating radio resource control RRC connection establishment, initiating RRC connection recovery, initiating RRC connection re-establishment, initiating early data transmission EDT . Initiate transmission using the preconfigured uplink resource PUR.
The network device according to claim 51, wherein the synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The network device according to claim 51 or 52, wherein the synchronization assistance information includes a public timing value and/or an offset value of the public timing value, and the public timing value and/or an offset value of the public timing value The offset value is obtained based on the first system message.
The network device of claim 53, wherein,

The first system message corresponds to a first reference time, the first reference time is determined based on a first time unit for transmitting the first system message, and the first time unit is a time unit determined based on a first sequence ;

The first timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The network device according to any one of claims 51 to 54, wherein the synchronization assistance information includes ephemeris information, and the ephemeris information is acquired based on a second system message.
The network device of claim 55, wherein,

The second system message corresponds to a second reference time, the second reference time is determined based on a second time unit for transmitting the second system message, and the second time unit is a time unit determined based on a second sequence ;

The second timing is one of the following: a downlink timing of a network device, a downlink timing of a reference point, a downlink timing of a satellite, and a downlink timing of a terminal device.
The network device according to any one of claims 51 to 56, characterized in that,

The synchronization assistance information is obtained based on a first system message and a second system message, where the first system message corresponds to a first reference time, and the second system message corresponds to a second reference time.
The network device of claim 57, wherein,

The first reference moment is a different moment than the second reference moment, or,

The first timing corresponding to the first reference moment is different from the second timing corresponding to the second reference moment.
The network device according to any one of claims 51 to 58, characterized in that,

The timing advance value of the serving link is a timing advance value corresponding to the link between the terminal device and the satellite; and/or,

The timing advance value of the feeder link is a timing advance value corresponding to the link between the satellite and the reference point.
The network device according to any one of claims 51 to 59, wherein the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization, including:

The synchronization assistance information is used by the terminal device to obtain the timing advance value.
A network device, characterized in that it includes:

A communication unit, configured to send system information carrying synchronization assistance information to the terminal device after a second process initiated by the terminal device, where the second process is used to request system information carrying synchronization assistance information;

Wherein, the synchronization assistance information is used for the terminal device to complete time domain and/or frequency domain synchronization.
The network device of claim 61, wherein,

The second process is initiated by the terminal device before the target timer expires, or the second process is initiated by the terminal device after the target timer expires.
The network device according to claim 62, wherein the target timer comprises at least one of the following:

Timers corresponding to ephemeris information, timers corresponding to public timing values, timers corresponding to offset values of public timing values, timers corresponding to uplink synchronization validity period, timers corresponding to GNSS, public transmission delay The corresponding timer is the uplink synchronization timer.
The network device according to any one of claims 61 to 63, wherein,

The terminal device obtains a timing advance value before the second procedure; or,

The terminal device acquires the timing advance value in the second process;

Wherein, the timing advance value includes a timing advance value of a serving link and/or a timing advance value of a feeder link.
The network device according to any one of claims 61 to 64, wherein,

The synchronization assistance information includes at least one of the following:

Ephemeris information, public timing value, offset value of public timing value, public transmission delay, reference time, reference point position.
The network device according to any one of claims 61 to 65, wherein the second procedure comprises a random access procedure.
A terminal device, characterized in that it includes: a processor and a memory, the memory is used to store computer programs, the processor is used to call and run the computer programs stored in the memory, and execute any one of claims 1 to 10 A method according to one of the claims, or, performing a method according to any one of claims 11 to 17.
A network device, characterized by comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to invoke and run the computer program stored in the memory, and execute any of claims 18 to 27 A method according to one, or, performing a method according to any one of claims 28 to 33.
A chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 10, or, Carrying out the method as claimed in any one of claims 11 to 17.
A chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 18 to 27, or, Carrying out a method as claimed in any one of claims 28 to 33.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to perform the method according to any one of claims 1 to 10, or to perform the method according to any one of claims 11 to 17 any one of the methods described.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to perform the method according to any one of claims 18 to 27, or to perform the method according to any one of claims 28 to 33 any one of the methods described.
A computer program product, characterized in that it includes computer program instructions, the computer program instructions cause the computer to perform the method according to any one of claims 1 to 10, or to perform any one of claims 11 to 17 the method described.
A computer program product, characterized in that it includes computer program instructions, the computer program instructions cause the computer to perform the method according to any one of claims 18 to 27, or to perform any one of claims 28 to 33 the method described.
A computer program, characterized in that the computer program causes the computer to execute the method according to any one of claims 1 to 10, or to execute the method according to any one of claims 11 to 17.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 18 to 27, or to execute the method according to any one of claims 28 to 33.