Wireless communication method, terminal device and network device

Abstract

The embodiment of the invention provides a wireless communication method, terminal equipment and network equipment, and the network equipment can inform the terminal equipment of first information corresponding to a first time period in a message, so that the terminal equipment can obtain time domain and / or frequency domain synchronization in the corresponding first time period according to the first information. The wireless communication method comprises the following steps: a terminal device receives first information sent by a network device; wherein the first information is associated with a first time period, and the first information is used for acquiring at least one of the following information: a first timing value, an offset rate of the first timing value, a change rate of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a change rate of the offset rate of the first frequency offset value, first ephemeris information, and the first time period; the first time period corresponds to one or more time domain positions.

Description

[0001] This application is a divisional application of the patent application filed on May 10, 2021, with application number 202180097849.3 and application name “Wireless Communication Method, Terminal Equipment and Network Equipment”. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0003] The fifth-generation mobile communication technology new radio (5G NR) system defines the deployment scenario of non-terrestrial networks (NTN) systems, including satellite networks. With the wide-area coverage capability of satellites, NTN systems can achieve the continuity of 5G NR services. However, in the NTN scenario, due to the long communication distance between the terminal device and the satellite (or network device), the propagation delay of the signal communication is large, which brings new challenges to the time domain and frequency domain synchronization between the terminal device and the satellite. Summary of the invention

[0004] An embodiment of the present application provides a wireless communication method, terminal device and network device, and the network device can notify the terminal device of first information corresponding to a first time period in a message, so that the terminal device can obtain time domain and / or frequency domain synchronization within the corresponding first time period based on the first information.

[0005] In a first aspect, a wireless communication method is provided, the method comprising:

[0006] The terminal device receives first information sent by the network device; wherein the first information is associated with a first time period, and the first information is used to obtain at least one of the following information:

[0007] The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0008] In a second aspect, a wireless communication method is provided, the method comprising:

[0009] The network device sends first information to the terminal device, where the first information is associated with a first time period; wherein,

[0010] The first information is used to obtain at least one of the following information:

[0011] a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a rate of change of the offset rate of the first frequency offset value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period;

[0012] or,

[0013] The first information includes at least one of the following information:

[0014] The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0015] In a third aspect, a terminal device is provided for executing the method in the first aspect.

[0016] Specifically, the terminal device includes a functional module for executing the method in the above-mentioned first aspect.

[0017] In a fourth aspect, a network device is provided for executing the method in the second aspect.

[0018] Specifically, the network device includes a functional module for executing the method in the above second aspect.

[0019] In a fifth aspect, a terminal device is provided, comprising 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 to execute the method in the first aspect.

[0020] In a sixth aspect, a network device is provided, comprising 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 to execute the method in the second aspect.

[0021] In a seventh aspect, a device is provided for implementing the method in any one of the first to second aspects above.

[0022] Specifically, the apparatus includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the apparatus executes the method in any one of the first to second aspects described above.

[0023] In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to second aspects above.

[0024] In a ninth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to second aspects above.

[0025] In a tenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects above.

[0026] Through the above technical solution, the network device can notify the terminal device of the first information associated with the first time period in a message, so that the terminal device can obtain the time domain and / or frequency domain synchronization within the corresponding first time period according to the first information. That is, the terminal device only needs to receive the message carrying the first information sent by the network device once within the first time period to obtain the time domain and / or frequency domain synchronization at any time within the first time period, thereby ensuring normal communication between the terminal device and the network device. In addition, by avoiding frequent reading of system messages, the power consumption of the terminal device can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A-Figure 1C It is a schematic diagram of an application scenario provided by an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the timing relationship of an NTN system provided by the present application.

[0029] Figure 3 It is a schematic diagram of the timing relationship of another NTN system provided by the present application.

[0030] Figure 4 It is a schematic diagram of ephemeris information provided by this application.

[0031] Figure 5 This is a schematic diagram of the change of a common timing value over time in a satellite scenario provided by the present application.

[0032] Figure 6 This is a schematic diagram of the variation of the offset rate of a common timing value over time in a satellite scenario provided by the present application.

[0033] Figure 7 This is a schematic diagram of the change rate of the offset rate of a common timing value in a satellite scenario provided by the present application over time.

[0034] Figure 8 It is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.

[0035] Fig. 9This is a schematic diagram of the change of a common timing value over time in a satellite scenario provided according to an embodiment of the present application.

[0036] Fig.10 It is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0037] Fig.11 It is a schematic block diagram of a network device provided according to an embodiment of the present application.

[0038] Fig.12 It is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0039] Fig.13 It is a schematic block diagram of a device provided according to an embodiment of the present application.

[0040] Fig.14 It is a schematic block diagram of a communication system provided according to an embodiment of the present application. Specific embodiments

[0041] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, 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, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0043] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0044] In some embodiments, the communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0045] In some embodiments, the communication system in the embodiments of the present application can be applied to unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiments of the present application can also be applied to licensed spectrum, where the licensed spectrum can also be considered as an unshared spectrum.

[0046] In some embodiments, the communication system in the embodiments of the present application can be applied to the FR1 frequency band (corresponding to the frequency band range of 410MHz to 7.125GHz), and can also be applied to the FR2 frequency band (corresponding to the frequency band range of 24.25GHz to 52.6GHz), and can also be applied to new frequency bands such as high-frequency frequency bands corresponding to the frequency band range of 52.6GHz to 71GHz.

[0047] In some embodiments, the embodiments of the present application can be applied to non-terrestrial communication networks (NTN) systems, and can also be applied to terrestrial communication networks (TN) systems.

[0048] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as 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.

[0049] The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0050] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).

[0051] In the embodiment of the present application, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, or a wireless terminal device in smart home, etc. The terminal device involved in the embodiment of the present application may also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE device, etc. The terminal device may also be fixed or mobile.

[0052] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, 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 clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0053] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0054] As an example but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0055] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0056] For example, Figure 1A The following is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. Figure 1A As shown, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located in the coverage area.

[0057] Figure 1AOne network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0058] For example, Figure 1B This is a schematic diagram of another communication system architecture provided in an embodiment of the present application. Figure 1B , including a terminal device 1101 and a satellite 1102, the terminal device 1101 and the satellite 1102 can communicate wirelessly. The network formed between the terminal device 1101 and the satellite 1102 can also be called NTN. Figure 1B In the architecture of the communication system shown, the satellite 1102 may have the function of a base station, and the terminal device 1101 and the satellite 1102 may communicate directly. In the system architecture, the satellite 1102 may be referred to as a network device. Optionally, the communication system may include multiple network devices 1102, and each network device 1102 may include other number of terminal devices within its coverage area, which is not limited in the embodiment of the present application.

[0059] For example, Figure 1C This is a schematic diagram of another communication system architecture provided in an embodiment of the present application. Figure 1C , including terminal equipment 1201, satellite 1202 and base station 1203, terminal equipment 1201 and satellite 1202 can communicate wirelessly, and satellite 1202 and base station 1203 can communicate. The network formed by terminal equipment 1201, satellite 1202 and base station 1203 can also be called NTN. Figure 1C In the architecture of the communication system shown, 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 transferred through the satellite 1202. In this system architecture, the base station 1203 can be called a network device. Optionally, the communication system may include multiple network devices 1203, and each network device 1203 may include other number of terminal devices within its coverage area, which is not limited in the embodiment of the present application.

[0060] It should be noted that Figure 1A-Figure 1C The system to which the present application is applicable is only illustrated in the form of an example. Of course, the method shown in the embodiment of the present application can also be applied to other systems, such as 5G communication system, LTE communication system, etc., and the embodiment of the present application does not make specific limitations on this.

[0061] Optionally, Figure 1A-Figure 1CThe wireless communication system shown may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but this is not limited in the embodiments of the present application.

[0062] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1A Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0063] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of 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 mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0065] In the embodiment of the present application, "configuration" may include a network device sending instruction information to a terminal device.

[0066] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0067] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0068] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0069] In order to better understand the embodiments of the present application, the NTN related to the present application is explained.

[0070] NTN generally uses satellite communications to provide communication services to ground users. Compared with ground cellular network communications, satellite communications have many unique advantages. First, satellite communications are not restricted by user regions. For example, general land communications cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be set up or where there is no communication coverage due to sparse population. For satellite communications, since one satellite can cover a large area of ​​land, and satellites can orbit the earth, in theory every corner of the earth can be covered by satellite communications. Secondly, satellite communications have great social value. Satellite communications can be covered at a low cost in remote mountainous areas, poor and backward countries or regions, so that people in these areas can enjoy advanced voice communications and mobile Internet technologies, which is conducive to narrowing the digital divide with developed areas and promoting the development of these areas. Thirdly, satellite communications have long distances, and the cost of communications does not increase significantly as the communication distance increases; finally, satellite communications are highly stable and are not restricted by natural disasters.

[0071] Communication satellites are divided into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, High Elliptical Orbit (HEO) satellites, etc. according to their orbital altitudes.

[0072] The altitude of low-orbit satellites (LEO) ranges from 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between users is generally less than 20ms. The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is small, and the transmission power requirement of user terminal equipment is not high.

[0073] The geosynchronous orbit (GEO) satellite has an orbit altitude of 35786km and a rotation period around the earth of 24 hours. The signal propagation delay of single-hop communication between users is generally 250ms.

[0074] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0075] In order to better understand the embodiments of the present application, the timing relationship of the NR-NTN system related to the present application is described.

[0076] In terrestrial communication systems, the propagation delay of signal communication is usually less than 1ms. In the NR-NTN system, due to the long communication distance between the terminal equipment and the satellite (or network equipment), the propagation delay of signal communication is very large, ranging from tens of milliseconds to hundreds of milliseconds, which is related to the satellite orbit height and the type of satellite communication service. In order to handle the relatively large propagation delay, the timing relationship of the NR-NTN system needs to be enhanced relative to the NR system.

[0077] In NTN systems (such as NR-NTN systems or Internet of Things NTN (IoT-NTN) systems), like NR systems, UEs need to consider the impact of timing advance (TA) when performing uplink transmission. Since the propagation delay in the system is large, the range of TA values ​​is also relatively large. When a UE is scheduled to perform uplink transmission in time unit (such as time slot or subframe) n, the UE considers the round-trip propagation delay and transmits in advance during uplink transmission, so that the signal can reach the network device side at the uplink time unit n on the network device side. Specifically, the timing relationship in the NTN system may include two situations, as follows: Figure 2 and Figure 3 shown.

[0078] Case 1: Figure 2 As shown, the downlink (DL) time unit and the uplink (UL) time unit on the network device side are aligned. Accordingly, in order to align the UE's uplink transmission with the uplink time unit on the network device side when it arrives at the network device side, the UE needs to use a larger TA value. In some cases, the TA value corresponds to the offset value Koffset.

[0079] Case 2: Figure 3 As shown, there is an offset value between the downlink time unit and the uplink time unit on the network device side. In this case, if you want to align the UE's uplink transmission with the uplink time unit on the network device side when it arrives at the network device side, the UE only needs to use a smaller TA value. In some cases, the TA value corresponds to the offset value Koffset. In other cases, the UE's RTT corresponds to the offset value Koffset.

[0080] In order to better understand the embodiments of the present application, the ephemeris information in the NTN system related to the present application is described.

[0081] Satellite ephemeris information includes the position, velocity and time state (Position Velocity Time, PVT) vector information of the satellite. The terminal device obtains the PVT vector information of the satellite according to the ephemeris information format sent by the network device. Specifically, the ephemeris information format sent by the network device can include the following two methods:

[0082] Method 1: Ephemeris information format based on orbit information.

[0083] In method 1, the network device broadcasts the ephemeris parameters (α(km), e, I(deg), Ω(deg), ω(deg), M(deg)) at time t0, for example, moment t0.

[0084] Among them, α represents the semi-major (unit can be meter), e represents the eccentricity (Eccentricity), ω represents the argument of periapsis (unit can be rad (radian angle)), Ω represents the longitude of ascending node (unit can be rad), i represents the inclination (unit can be rad), M represents the mean anomaly M at epoch time t0 (unit can be rad), such as Figure 4 shown.

[0085] In some cases, the terminal device can obtain the satellite's PVT vector based on the Earth-Centered, Earth-Fixed (ECEF) coordinate system (also called the geocentric coordinate system) at time t0 based on the received ephemeris parameters at time t0; the terminal device can obtain the satellite's PVT vector based on the geocentric coordinate system at time t based on the satellite's PVT vector based on the geocentric coordinate system at time t0.

[0086] Alternatively, in other cases, the terminal device obtains the ephemeris parameters of the satellite at time t based on the ephemeris parameters received from the satellite at time t0; then the terminal device can obtain the PVT vector of the satellite based on the geocentric coordinate system at time t based on the ephemeris parameters of the satellite at time t.

[0087] The PVT vectors based on the geocentric coordinate system include (S X ,S Y ,S Z ,V X ,VY ,V Z ). Among them, (S X ,S Y ,S Z ) corresponds to the satellite position, (V X ,V Y ,V Z ) corresponds to the satellite speed.

[0088] As an example, in mode 1, the format of the ephemeris information notified by the network device is shown in Table 1 below.

[0089] Table 1

[0090]

[0091] As another example, accordingly, the PVT vector obtained by the terminal device is shown in Table 2 below.

[0092] Table 2

[0093]

[0094] It should be noted that the epoch time t in Tables 1 and 2 above is o It can be an absolute time or an absolute moment.

[0095] Method 2: ephemeris information format based on instantaneous state vector, such as the PVT vector of the satellite at a specific moment.

[0096] In this method, the network device broadcasts the PVT vector (S) of the satellite based on the geocentric coordinate system at time t0 to the terminal device. X ,S Y ,S Z ,V X ,V Y ,V Z ). It should be understood that an example of the format of the ephemeris information notified by the network device in this manner may also be shown in Table 2. The terminal device obtains the PVT vector of the satellite based on the geocentric coordinate system at time t based on the PVT vector of the satellite based on the geocentric coordinate system at time t0.

[0097] In the above two methods, for the satellite's ephemeris information notification at time t0, this information at time t0 can be implicitly obtained by receiving the downlink subframe of the ephemeris information. In addition, the notification method of method 1 has a smaller overhead than that of method 2. However, in method 1, the terminal device needs to model and estimate the PVT vector of the satellite, so the accuracy is worse than that of method 2.

[0098] To facilitate a better understanding of the embodiments of the present application, the timing adjustment in the NTN system related to the present application is described.

[0099] In the NTN system, the network device needs to send synchronization assistance information such as ephemeris information (satellite moving speed and / or satellite position), reference point position, public timing value (such as timing value between the network device and the reference point, and / or timing value between the network device and the satellite, and / or timing value between the satellite and the reference point), timestamp and other information to the terminal device, for the terminal device to complete time domain and / or frequency domain synchronization. Accordingly, the terminal device needs to obtain the synchronization assistance information sent by the network device, and complete the corresponding time domain and / or frequency domain synchronization according to its own GNSS capability. The terminal device should obtain at least one of the following information based on its GNSS capability: the position of the terminal device, the time reference and the frequency reference. In addition, based on the above information, as well as the synchronization assistance information indicated by the network device (such as the service satellite ephemeris information or timestamp), the terminal device can calculate the timing and / or frequency deviation, and apply timing advance compensation and / or frequency deviation adjustment in the idle state, inactive state or connected state.

[0100] In some cases, the terminal device can calculate the TA value according to the following formula 1, and transmit the uplink channel or uplink signal according to the determined TA.

[0101] T TA = (N TA + N TA , UE-specific + N TA , offset + N TA , common )*Tc Formula 1

[0102] Among them, N TA,UE-specific It can be the TA value estimated by the terminal device itself, N TA,offset Same as the existing protocol, for example, it is determined based on the network frequency band and LTE or NR coexistence. TA,common Contains the common timing values ​​broadcast by network devices, N TA It can be the TA value indicated by the network device (if the uplink channel includes PRACH or MsgA transmission, N TA The value is 0). Tc represents the sampling time interval unit, Tc = 1 / (480*1000*4096).

[0103] In the above T TA In the determination formula 1, N TA,common It may also change over time, so N TA,common The value can be determined in the following two ways:

[0104] Method 1: First-order approximation, network devices need to broadcast the offset rate of the public timing value, as shown in Formula 2.

[0105] N TA,Commom(t) =N TA,commomt0 +TA Commondrift,t0 ×(t-t0+δ t0 ) Formula 2

[0106] Among them, N TA,common,t0 represents N at time t0 TA,common Value, TA Commondrift,t0 It represents the deviation rate of the public timing value corresponding to time t0, and represents the one-way propagation delay from the network device to the terminal device at time t0 of the terminal device.

[0107] Method 2: Second-order approximation, the network device needs to broadcast the offset rate of the public timing value and the rate of change of the offset rate of the public timing value, as shown in Formula 3.

[0108]

[0109] Among them, N TA,common,t0 represents N at time t0 TA,common Value, TA Commondrift,t0 Indicates the deviation rate of the common timing value corresponding to time t0, TA Commondrift_variation_rate,t0 The rate of change of the offset rate of the common timing value corresponding to time t0 represents the one-way propagation delay from the network device to the terminal device at time t0 of the terminal device.

[0110] In order to facilitate a better understanding of the embodiments of the present application, the problems existing in the prior art are explained.

[0111] In the prior art, network devices need to broadcast a common timing value, and may also need to broadcast an offset rate of the common timing value and / or a rate of change of the offset rate of the common timing value. Figure 5 A schematic diagram of the change of the common timing value (in ms) over time in a satellite scenario is given. Figure 6 A schematic diagram of the variation of the offset rate of the common timing value (middle figure, unit is μs / s) over time in a satellite scenario is given. Figure 7 The change rate of the offset rate of the common timing value in a satellite scenario is given (right figure, unit is μs / s 2 ) changes over time. Since the common timing value, the offset rate of the common timing value, and the rate of change of the offset rate of the common timing value will change over time, the network device needs to notify this information more frequently, for example, through system messages. Accordingly, the terminal device needs to read the system message frequently to obtain updates of this information, which causes the terminal device to consume more power. How to notify this information more effectively is a problem to be solved.

[0112] Based on the above problems, the present application proposes a time-frequency synchronization solution, whereby the network device can notify the terminal device of the first information associated with the first time period in a message, so that the terminal device can obtain the time domain and / or frequency domain synchronization within the corresponding first time period according to the first information. That is, the terminal device only needs to receive the message carrying the first information sent by the network device once within the first time period, so as to obtain the time domain and / or frequency domain synchronization at any time within the first time period, thereby ensuring normal communication between the terminal device and the network device. In addition, by avoiding frequent reading of system messages, the power consumption of the terminal device can be saved.

[0113] The technical solution of the present application is described in detail below through specific embodiments.

[0114] Figure 8 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application, such as Figure 8 As shown, the wireless communication method 200 may include at least part of the following contents:

[0115] S210, the network device sends first information to the terminal device; wherein the first information is associated with a first time period, and the first information is used to obtain at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a rate of change of the offset rate of the first frequency offset value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period;

[0116] S220, the terminal device receives the first information sent by the network device.

[0117] The "used to obtain" mentioned in the embodiments of the present application can be direct acquisition or indirect acquisition, and can also be an explicit indication or an implicit indication. For example, in Example 1, "A is used to obtain B" includes: "A directly obtains B", for example, A includes B. Example 2, "A is used to obtain B" includes: "A indirectly obtains B", for example, A includes C, and C is used to indicate B. Example 3, "A is used to obtain B" includes: "A explicitly indicates B". Example 4, "A is used to obtain B" includes: "A implicitly indicates B".

[0118] In some embodiments, the first information is used to obtain at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency deviation value, an offset rate of the first frequency deviation value, a rate of change of the offset rate of the first frequency deviation value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period; including:

[0119] The first information is used to indicate at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency deviation value, an offset rate of the first frequency deviation value, a rate of change of the offset rate of the first frequency deviation value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0120] In some embodiments, the first information is used to obtain at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency deviation value, an offset rate of the first frequency deviation value, a rate of change of the offset rate of the first frequency deviation value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period; including:

[0121] The first information includes at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency deviation value, an offset rate of the first frequency deviation value, a rate of change of the offset rate of the first frequency deviation value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0122] In some embodiments, the terminal device obtains time domain and / or frequency domain synchronization corresponding to at least one time corresponding to the first time period according to the first information. Further, the terminal device can obtain time domain and / or frequency domain synchronization corresponding to any time corresponding to the first time period according to the first information.

[0123] In an embodiment of the present application, the network device can notify the terminal device of the first information associated with the first time period in a message, so that the terminal device can obtain the time domain and / or frequency domain synchronization within the corresponding first time period according to the first information. That is, the terminal device only needs to receive the message carrying the first information sent by the network device once within the first time period to obtain the time domain and / or frequency domain synchronization at any time within the first time period, thereby ensuring normal communication between the terminal device and the network device. In addition, by avoiding frequent reading of system messages, the power consumption of the terminal device can be saved.

[0124] In some embodiments, the embodiments of the present application may be applied to an NTN network. Of course, the embodiments of the present application may also be applied to other networks, which is not limited in the present application.

[0125] In some embodiments, the first timing value is a common timing value.

[0126] In some embodiments, the offset rate of the first timing value is the offset rate of the common timing value.

[0127] In some embodiments, the rate of change of the offset rate of the first timing value is the rate of change of the offset rate of the common timing value.

[0128] In some embodiments, the first frequency offset value is a common frequency offset value.

[0129] In some embodiments, the offset rate of the first frequency offset value is the offset rate of the common frequency offset value.

[0130] In some embodiments, the change rate of the offset rate of the first frequency offset value is the change rate of the offset rate of the common frequency offset value.

[0131] In some embodiments, the format of the first ephemeris information may be the ephemeris information format based on orbital information or the ephemeris information format based on instantaneous state vector.

[0132] In some embodiments, the offset rate of the first timing value includes the offset rate associated with the first timing value, the rate of change of the offset rate of the first timing value includes the rate of change of the offset rate associated with the first timing value, the offset rate of the first frequency deviation value includes the offset rate associated with the first frequency deviation value, and the rate of change of the offset rate of the first frequency deviation value includes the rate of change of the offset rate associated with the first frequency deviation value.

[0133] In some embodiments, the first information is associated with at least one of the following information:

[0134] Time information, ephemeris information format, ephemeris information, group identifier, reference signal index (for example, synchronization signal block (SSB) index or channel state information reference signal (CSI-RS) index), cell identifier, antenna polarization mode, satellite identifier, service satellite, service duration of the service satellite, satellite that is about to provide service, time when the satellite that is about to provide service starts service, satellite that is about to stop providing service, time when the satellite that is about to stop providing service stops service.

[0135] In some embodiments, the first information is associated with a first time period, including:

[0136] The first information is associated with M time domain positions included in the first time period, where M is a positive integer and is greater than or equal to 1.

[0137] In some embodiments, the time domain position in the M time domain positions may be a moment or a time period, which is not limited in the present application.

[0138] In some embodiments, the M time domain positions may be absolute time (eg, Universal Time Coordinated, UTC) time) or relative time (eg, the first time domain position of the M time domain positions is 0).

[0139] For example, the first information is associated with M time domain positions corresponding to the first time period, or the first information is associated with M time domain positions within the first time period, including: the first information is associated with M moments corresponding to the first time period, or the first information is associated with M moments within the first time period. The "time domain position" in the embodiments of the present application can be replaced by "moment" or similar expressions, and the present application is not limited to this.

[0140] In some embodiments, the first information is used to obtain at least one of the following information:

[0141] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

[0142] In some embodiments, the first information includes at least one of the following information:

[0143] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

[0144] In some embodiments, the first information is used to indicate at least one of the following information:

[0145] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

[0146] In some embodiments, the terminal device obtains the first timing value corresponding to the M time domain positions based on the first information.

[0147] Example 1: The first information is used to obtain first timing values ​​corresponding to the M time domain positions, respectively. That is, in Example 1, M is greater than 1.

[0148] For example, the first information is used to obtain the first timing values ​​respectively corresponding to the M time domain positions, including: the first information is used to indicate the first timing values ​​respectively corresponding to the M time domain positions.

[0149] For another example, the first information is used to obtain the first timing values ​​respectively corresponding to the M time domain positions, including: the first information includes the first timing values ​​respectively corresponding to the M time domain positions.

[0150] In some implementations of Example 1, the first information includes multiple first timing values, and the multiple first timing values ​​correspond to multiple different time domain positions, as shown in Table 3 below.

[0151] Table 3

[0152] Time Domain Position First timing value t0 First timing value 0 t1 First timing value 1 t2 First timing value 2 … … tn The first timing value n

[0153] Specifically, the first timing values ​​respectively corresponding to M time domain positions may be obtained according to the above Table 3, where M is part or all of the time domain positions in the time domain positions {t0, t1, ..., tn}.

[0154] Example 2: The first information is used to obtain a first timing value corresponding to at least one time domain position among the M time domain positions and an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions.

[0155] For example, the first information is used to obtain the first timing value corresponding to at least one of the M time domain positions and the offset rate of the first timing value corresponding to at least one of the M time domain positions, including: the first information includes the first timing value corresponding to at least one of the M time domain positions and the offset rate of the first timing value corresponding to at least one of the M time domain positions.

[0156] For another example, the first information is used to obtain the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions and the first timing value corresponding to at least one time domain position among the M time domain positions, including: the first information is used to indicate the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions and the first timing value corresponding to at least one time domain position among the M time domain positions.

[0157] In some implementations of Example 2, the first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and to obtain an offset rate of first timing values ​​corresponding to at least two time domain positions among the M time domain positions.

[0158] In some implementations of Example 2, the first information includes a first timing value corresponding to the time domain position t0, and an offset rate of multiple first timing values ​​corresponding to the time domain positions t0 to tn, as shown in Table 4 below.

[0159] Table 4

[0160]

[0161] In some implementations of Example 2, the terminal device determines the first timing values ​​corresponding to the M time domain positions respectively according to the following Formula 4 or Formula 5.

[0162]

[0163] Among them, t i represents the i+1th time domain position among the M time domain positions, i=1,2…,M-1, t0 represents the first time domain position among the M time domain positions, represents the time domain position t i-1 The corresponding first timing value, represents the time domain position t i The corresponding first timing value, D i-1 Indicates t i-1 The corresponding offset rate of the first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0164] Example 3, the first information is used to obtain the first timing value corresponding to at least one time domain position among the M time domain positions, the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and the rate of change of the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions.

[0165] For example, the first information is used to obtain the first timing value corresponding to at least one of the M time domain positions, the offset rate of the first timing value corresponding to at least one of the M time domain positions, and the rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions, including: the first information includes the first timing value corresponding to at least one of the M time domain positions, the offset rate of the first timing value corresponding to at least one of the M time domain positions, and the rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

[0166] For another example, the first information is used to obtain the first timing value corresponding to at least one of the M time domain positions, the offset rate of the first timing value corresponding to at least one of the M time domain positions, and the rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions, including: the first information is used to indicate the first timing value corresponding to at least one of the M time domain positions, the offset rate of the first timing value corresponding to at least one of the M time domain positions, and the rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

[0167] In some implementations of Example 3,

[0168] The first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and is used to obtain a rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions; or,

[0169] The first information is used to obtain the first timing value corresponding to the first time domain position among the M time domain positions, and is used to obtain the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions, and is used to obtain the rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions.

[0170] In some implementations of Example 3, the first information includes the first timing value corresponding to time t0, and the offset rate of the first timing value corresponding to time t0 to time tn and the rate of change of the offset rate of the first timing value. Table 5 below gives an example.

[0171] Table 5

[0172]

[0173] In some implementations of Example 3, the terminal device determines the first timing values ​​corresponding to the M time domain positions respectively according to the following Formula 6 or Formula 7.

[0174]

[0175] Among them, t i represents the i+1th time domain position among the M time domain positions, i=1,2…,M-1, t0 represents the first time domain position among the M time domain positions, represents the time domain position t i-1 The corresponding first timing value, represents the time domain position t i The corresponding first timing value, D i-1 Indicates t i-1 The corresponding deviation rate of the first timing value, V i-1 Indicates t i-1 The rate of change of the offset rate of the corresponding first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0176] In some embodiments, the terminal device determines the first timing value corresponding to the first time domain position based on the first timing values ​​corresponding to the M time domain positions; wherein the first time domain position is the time domain position corresponding to the first time period, or the first time domain position is the time domain position in the first time period.

[0177] In some embodiments, the terminal device determines the first timing value corresponding to the first time domain position according to the following formula 8 or formula 9. In this case, M is greater than 1.

[0178]

[0179] Wherein, t represents the first time domain position, represents the first timing value corresponding to the first time domain position, t k-1 represents the kth time domain position among the M time domain positions, Indicates t k-1 The corresponding first timing value, t k represents the k+1th time domain position among the M time domain positions, Indicates t k The corresponding first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0180] Wherein, in Formula 8 or Formula 9, the first time domain position is t k-1 With t k The time domain position between t k-1 The previous time domain position, or the first time domain position is t k The subsequent time domain position.

[0181] In some embodiments, the terminal device determines the first timing value corresponding to the first time domain position according to the following formula 10 or formula 11.

[0182]

[0183] Wherein, t represents the first time domain position, represents a first timing value corresponding to the first time domain position, represents the first timing value corresponding to the time domain position t0, t0 represents the first time domain position among the M time domain positions, D0 represents the offset rate of the first timing value corresponding to t0, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0184] In Formula 10 or Formula 11, the first time domain position is the time domain position before t0, or the first time domain position is the time domain position after t0.

[0185] In some embodiments, the terminal device determines the first timing value corresponding to the first time domain position according to the following formula 12 or formula 13.

[0186]

[0187] Wherein, t represents the first time domain position, represents a first timing value corresponding to the first time domain position, represents the first timing value corresponding to the time domain position t0, t0 represents the first time domain position among the M time domain positions, D0 represents the offset rate of the first timing value corresponding to t0, V0 represents the rate of change of the offset rate of the first timing value corresponding to t0, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0188] In Formula 12 or Formula 13, the first time domain position is the time domain position before t0, or the first time domain position is the time domain position after t0.

[0189] In some embodiments, the terminal device performs time domain synchronization corresponding to the first time domain position according to a first timing value corresponding to the first time domain position.

[0190] In some embodiments, the network device indicates the frequency deviation value in a manner similar to the above-mentioned manner of indicating the timing value. For details, please refer to the above-mentioned description on the timing value. For the sake of brevity, it will not be repeated here.

[0191] In some embodiments, the processing method for the frequency deviation value is similar to the processing method for the timing value described above. For details, please refer to the relevant description of the timing value described above. For the sake of brevity, it will not be repeated here.

[0192] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are equal.

[0193] In some embodiments, the time domain position interval between two adjacent time domain positions among the M time domain positions is a first length.

[0194] In some embodiments, the first length is configured by the network device through at least one of a system message, a radio resource control (Radio Resource Control, RRC) message, a media access control control element (Media Access Control Control Element, MAC CE), and a downlink control information (Downlink Control Information, DCI); or, the first length is predefined or agreed upon by protocol.

[0195] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are not equal.

[0196] In some embodiments, at least one of the M time domain positions has an associated relationship with the time domain position corresponding to the ephemeris information, or at least one of the M time domain positions is a time domain position among the time domain positions corresponding to the ephemeris information.

[0197] In some embodiments, the ephemeris information is the first ephemeris information, or the first information at least includes the first ephemeris information.

[0198] In some embodiments, each time domain position in the M time domain positions corresponds one-to-one to a time domain position in the time domain position corresponding to the ephemeris information.

[0199] For example, the ephemeris information corresponds to M time domain positions, and each time domain position in the M time domain positions corresponds one-to-one to each time domain position in the time domain positions corresponding to the ephemeris information.

[0200] For another example, the ephemeris information corresponds to 2M time domain positions, then the time domain positions among the M time domain positions correspond one-to-one to the odd-numbered time domain positions in the time domain positions corresponding to the ephemeris information, or, the time domain positions among the M time domain positions correspond one-to-one to the even-numbered time domain positions in the time domain positions corresponding to the ephemeris information, or, the time domain positions among the M time domain positions correspond one-to-one to the first M time domain positions corresponding to the ephemeris information, and the time domain positions among the M time domain positions correspond one-to-one to the last M time domain positions corresponding to the ephemeris information.

[0201] In some embodiments, the ephemeris information is used to determine the position information of the satellite and / or the speed information of the satellite. For example, the ephemeris information is used to indicate the position information of the satellite and / or the speed information of the satellite. As an example, the ephemeris information format is an ephemeris information format based on an instantaneous state vector. For another example, the ephemeris information is used to indicate the ephemeris parameters of the satellite (α(km), e, I(deg), Ω(deg), ω(deg), M(deg)), and the terminal device determines the position information of the satellite and / or the speed information of the satellite based on the ephemeris parameters of the satellite. As an example, the ephemeris information format is an ephemeris information format based on orbital information.

[0202] In some embodiments, the format of the ephemeris information is the format shown in Table 1.

[0203] In some embodiments, the format of the ephemeris information is the format shown in Table 2.

[0204] In some embodiments, the first time period is associated with a second length, or the length of the first time period is the second length.

[0205] In some embodiments, the second length is configured by the network device through at least one of a system message, an RRC message, a MAC CE, and a DCI; or, the second length is predefined or agreed upon by a protocol.

[0206] In some embodiments, the second length is determined based on one or more time domain positions corresponding to the first time period; or, the second length is determined based on M time domain positions corresponding to the first time period.

[0207] In some embodiments, the first time domain position among the M time domain positions is the starting time domain position of the first time period, and / or the last time domain position among the M time domain positions is the ending time domain position of the first time period.

[0208] In some embodiments, the first information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0209] For example, the above system message includes an NTN System Information Block (NTN-SIB) message.

[0210] For example, the above RRC message includes a handover command sent by the network device.

[0211] In some embodiments, one NTN-SIB message only includes first information associated with one cell.

[0212] In some embodiments, one NTN-SIB message includes first information associated with multiple cells. Optionally, the first information of different cells includes the same content, or the first information of different cells includes different content.

[0213] In some embodiments, in different NTN scenarios, the first information includes different contents.

[0214] In some embodiments, the content included in the first information is determined based on the second information.

[0215] In some embodiments, the second information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0216] In some embodiments, the second information is used to determine whether the scenario corresponding to the network device is a GEO scenario or a non-GEO scenario, wherein the content included in the first information in the GEO scenario is different from the content included in the first information in the non-GEO scenario.

[0217] For example, the second information indicates that the scenario corresponding to the network device is a GEO scenario, or indicates that the scenario corresponding to the network device is a non-GEO scenario such as a LEO or MEO scenario.

[0218] For example, when the scenario corresponding to the network device is a GEO scenario, the first information does not include at least one of the following:

[0219] The offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the offset rate of the first frequency offset value, and the rate of change of the offset rate of the first frequency offset value.

[0220] For another example, when the scenario corresponding to the network device is a non-GEO scenario, the first information includes at least one of the following:

[0221] The offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the offset rate of the first frequency offset value, and the rate of change of the offset rate of the first frequency offset value.

[0222] It should be understood that in some cases, since the GEO scene is a synchronous satellite scene, it is not necessary to indicate the offset rate and the rate of change of the offset rate.

[0223] Therefore, in an embodiment of the present application, the network device can notify the terminal device of the first information associated with the first time period in a message, so that the terminal device can obtain the time domain and / or frequency domain synchronization within the corresponding first time period according to the first information. That is, the terminal device only needs to receive the message carrying the first information sent by the network device once within the first time period to obtain the time domain and / or frequency domain synchronization at any time within the first time period, thereby ensuring normal communication between the terminal device and the network device. In addition, by avoiding frequent reading of system messages, the power consumption of the terminal device can be saved.

[0224] As an example but not limitation, a terminal device receives first information sent by a network device, the first information includes common timing values ​​corresponding to multiple moments in a first time period, wherein the start moment of the first time period (represented by 0) is determined according to the downlink time unit of the received first information. Figure 5 When the notification is quantified in this manner, the first information is as shown in Table 6 below.

[0225] Table 6 First timing value indication

[0226]

[0227] It should be noted that the time in the above Table 6 may be a relative time.

[0228] In the above example, the terminal device can obtain the common timing value at any time within the 270s (ie, the first time period) by interpolation according to Table 6, such as Fig. 9 It should be understood that if a higher precision curve fitting is desired, the network device can use a denser granularity for sampling notification, which will not be described in detail in this application.

[0229] In the above example, the terminal device obtains the time domain and / or frequency domain synchronization corresponding to at least one time corresponding to the first time period according to the first information. Further, the terminal device can obtain the time domain and / or frequency domain synchronization corresponding to any time corresponding to the first time period according to the first information. For example, the terminal device obtains the time domain and / or frequency domain synchronization at any time within 270s from the downlink time unit of the first information is received according to the first information.

[0230] As another example, the terminal device receives the first information sent by the network device, and the time associated with the first information can be determined according to the time associated with the ephemeris information. Tables 7 and 8 below respectively give two examples of notification formats of the first information.

[0231] Table 7 First Information Notification Format Example 1

[0232]

[0233] Table 8 First Information Notification Format Example 2

[0234]

[0235] In the above example, the terminal device obtains the time domain and / or frequency domain synchronization of any moment in the first time period corresponding to the moment associated with the first information, such as t0 to tn, based on the first information.

[0236] It should be noted that the description of the first information in the above example can refer to the above description of the first information, and for the sake of brevity, it will not be repeated here.

[0237] Combination of the above Figures 8 to 9 , describes in detail the method embodiment of the present application, and the following is combined with Figures 10 to 14 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0238] Fig.10 FIG. 3 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application. Fig.10 As shown, the terminal device 300 includes:

[0239] The communication unit 310 is configured to receive first information sent by a network device; wherein the first information is associated with a first time period, and the first information is used to obtain at least one of the following information:

[0240] The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0241] In some embodiments, the first information is associated with a first time period, including:

[0242] The first information is associated with M time domain positions included in the first time period, where M is a positive integer and is greater than or equal to 1.

[0243] In some embodiments, the first information is used to obtain at least one of the following information:

[0244] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

[0245] In some embodiments, the terminal device 300 further includes:

[0246] The processing unit 320 is configured to obtain, according to the first information, first timing values ​​corresponding to the M time domain positions.

[0247] In some embodiments, the first information is used to obtain first timing values ​​corresponding to the M time domain positions respectively.

[0248] In some embodiments, the first information is used to obtain a first timing value corresponding to at least one time domain position among the M time domain positions and an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions.

[0249] In some embodiments, the first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing values ​​corresponding to at least two time domain positions among the M time domain positions.

[0250] In some embodiments, the processing unit 320 is specifically configured to:

[0251] The first timing values ​​respectively corresponding to the M time domain positions are determined according to the following formula:

[0252] or,

[0253] Among them, t i represents the i+1th time domain position among the M time domain positions, i=1,2…,M-1, t0 represents the first time domain position among the M time domain positions, represents the time domain position t i-1 The corresponding first timing value, represents the time domain position t i The corresponding first timing value, D i-1 Indicates t i-1 The corresponding offset rate of the first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0254] In some embodiments, the first information is used to obtain a first timing value corresponding to at least one of the M time domain positions, an offset rate of the first timing value corresponding to at least one of the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

[0255] In some embodiments, the first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and is used to obtain a rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions; or,

[0256] The first information is used to obtain the first timing value corresponding to the first time domain position among the M time domain positions, and is used to obtain the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions, and is used to obtain the rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions.

[0257] In some embodiments, the processing unit 320 is specifically configured to:

[0258] The first timing values ​​respectively corresponding to the M time domain positions are determined according to the following formula:

[0259] or,

[0260]

[0261] Among them, t i represents the i+1th time domain position among the M time domain positions, i=1,2…,M-1, t0 represents the first time domain position among the M time domain positions, represents the time domain position t i-1 The corresponding first timing value, represents the time domain position t i The corresponding first timing value, D i-1 Indicates t i-1 The corresponding deviation rate of the first timing value, V i-1 Indicates t i-1 The rate of change of the offset rate of the corresponding first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0262] In some embodiments, the terminal device 300 further includes:

[0263] The processing unit 320 is used to determine the first timing value corresponding to the first time domain position according to the first timing values ​​corresponding to the M time domain positions; wherein the first time domain position is the time domain position corresponding to the first time period, or the first time domain position is the time domain position in the first time period.

[0264] In some embodiments, the processing unit 320 is specifically configured to:

[0265] The first timing value corresponding to the first time domain position is determined according to the following formula:

[0266] or,

[0267]

[0268] Among them, the first time domain position is t k-1 With t k The time domain position between t k-1 The previous time domain position, or the first time domain position is t k The subsequent temporal position;

[0269] Wherein, t represents the first time domain position, represents the first timing value corresponding to the first time domain position, t k-1 represents the kth time domain position among the M time domain positions, Indicates t k-1 The corresponding first timing value, t k represents the k+1th time domain position among the M time domain positions, Indicates t k The corresponding first timing value, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0270] In some embodiments, the processing unit 320 is specifically configured to:

[0271] The first timing value corresponding to the first time domain position is determined according to the following formula:

[0272] or,

[0273] The first time domain position is a time domain position before t0, or the first time domain position is a time domain position after t0;

[0274] Wherein, t represents the first time domain position, represents a first timing value corresponding to the first time domain position, represents the first timing value corresponding to the time domain position t0, t0 represents the first time domain position among the M time domain positions, D0 represents the offset rate of the first timing value corresponding to t0, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0275] In some embodiments, the processing unit 320 is specifically configured to:

[0276] The first timing value corresponding to the first time domain position is determined according to the following formula:

[0277] or,

[0278]

[0279] The first time domain position is a time domain position before t0, or the first time domain position is a time domain position after t0;

[0280] Wherein, t represents the first time domain position, represents a first timing value corresponding to the first time domain position, represents the first timing value corresponding to the time domain position t0, t0 represents the first time domain position among the M time domain positions, D0 represents the offset rate of the first timing value corresponding to t0, V0 represents the rate of change of the offset rate of the first timing value corresponding to t0, Represents the one-way propagation delay from the network device to the terminal device at the time domain position t0 of the terminal device.

[0281] In some embodiments, the processing unit 320 is specifically configured to:

[0282] According to the first timing value corresponding to the first time domain position, time domain synchronization corresponding to the first time domain position is performed.

[0283] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are equal.

[0284] In some embodiments, the time domain position interval between two adjacent time domain positions among the M time domain positions is a first length.

[0285] In some embodiments, the first length is configured by the network device through at least one of a system message, a radio resource control RRC message, a media access control element MAC CE, and downlink control information DCI; or,

[0286] The first length is predefined or agreed upon by a protocol.

[0287] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are not equal.

[0288] In some embodiments, at least one of the M time domain positions has an associated relationship with the time domain position corresponding to the ephemeris information, or at least one of the M time domain positions is a time domain position among the time domain positions corresponding to the ephemeris information.

[0289] In some embodiments, each time domain position in the M time domain positions corresponds one-to-one to a time domain position in the time domain position corresponding to the ephemeris information.

[0290] In some embodiments, the first time period is associated with a second length, or the length of the first time period is the second length.

[0291] In some embodiments, the second length is configured by the network device through at least one of a system message, an RRC message, a MAC CE, and a DCI; or,

[0292] The second length is predefined or agreed upon by a protocol.

[0293] In some embodiments, the first information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0294] In some embodiments, the content included in the first information is determined based on the second information.

[0295] In some embodiments, the second information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0296] In some embodiments, the second information is used to determine whether the scenario corresponding to the network device is a geosynchronous orbit GEO scenario or a non-GEO scenario, wherein the content included in the first information in the GEO scenario is different from the content included in the first information in the non-GEO scenario.

[0297] In some embodiments, the first information is associated with at least one of the following information:

[0298] Time domain position information, ephemeris information format, ephemeris information, group identifier, reference signal index, cell identifier, antenna polarization mode, satellite identifier, serving satellite, service duration of the serving satellite, satellite that will provide service, time when the satellite that will provide service starts, satellite that will not provide service, time when the satellite that will not provide service stops providing service.

[0299] In some embodiments, the processing unit 320 is specifically configured to:

[0300] According to the first information, time domain and / or frequency domain synchronization corresponding to at least one time domain position corresponding to the first time period is acquired.

[0301] In some embodiments, the 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 processing unit may be one or more processors.

[0302] It should be understood that the terminal device 300 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 and other operations and / or functions of each unit in the terminal device 300 are respectively to implement Figure 8 For the sake of brevity, the corresponding process of the terminal device in the method 200 is not repeated here.

[0303] Fig.11 FIG. 4 shows a schematic block diagram of a network device 400 according to an embodiment of the present application. Fig.11 As shown, the network device 400 includes:

[0304] The communication unit 410 is used to send first information to the terminal device, where the first information is associated with a first time period; wherein:

[0305] The first information is used to obtain at least one of the following information:

[0306] a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a rate of change of the offset rate of the first frequency offset value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period;

[0307] or,

[0308] The first information includes at least one of the following information:

[0309] The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

[0310] In some embodiments, the first information is associated with a first time period, including:

[0311] The first information is associated with M time domain positions included in the first time period, where M is a positive integer and is greater than or equal to 1.

[0312] In some embodiments, the first information is used to obtain at least one of the following information:

[0313] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the change rate of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency offset value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency offset value corresponding to one or more time domain positions among the M time domain positions, and the change rate of the offset rate of the first frequency offset value corresponding to one or more time domain positions among the M time domain positions;

[0314] or,

[0315] The first information includes at least one of the following information:

[0316] The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

[0317] In some embodiments, the first information is used to obtain first timing values ​​respectively corresponding to the M time domain positions; or,

[0318] The first information includes first timing values ​​corresponding to the M time domain positions respectively.

[0319] In some embodiments, the first information is used to obtain a first timing value corresponding to at least one time domain position of the M time domain positions and an offset rate of the first timing value corresponding to at least one time domain position of the M time domain positions; or,

[0320] The first information includes a first timing value corresponding to at least one time domain position among the M time domain positions and an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions.

[0321] In some embodiments, the first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing values ​​respectively corresponding to at least two time domain positions among the M time domain positions; or,

[0322] The first information includes a first timing value corresponding to a first time domain position among the M time domain positions, and includes offset rates of the first timing values ​​corresponding to at least two time domain positions among the M time domain positions.

[0323] In some embodiments, the first information is used to obtain a first timing value corresponding to at least one time domain position among the M time domain positions, an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions; or,

[0324] The first information includes a first timing value corresponding to at least one of the M time domain positions, an offset rate of the first timing value corresponding to at least one of the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

[0325] In some embodiments, the first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and is used to obtain a rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions; or,

[0326] The first information includes a first timing value corresponding to a first time domain position among the M time domain positions, and includes an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and includes a rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions; or,

[0327] The first information is used to obtain a first timing value corresponding to a first time domain position among the M time domain positions, and is used to obtain an offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions, and is used to obtain a rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions; or,

[0328] The first information includes the first timing value corresponding to the first time domain position among the M time domain positions, and includes the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions, and includes the rate of change of the offset rate of the first timing value corresponding to at least two time domain positions among the M time domain positions.

[0329] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are equal.

[0330] In some embodiments, the time domain position interval between two adjacent time domain positions among the M time domain positions is a first length.

[0331] In some embodiments, the first length is configured by the network device through at least one of a system message, a radio resource control RRC message, a media access control element MAC CE, and downlink control information DCI; or,

[0332] The first length is predefined or agreed upon by a protocol.

[0333] In some embodiments, the time domain position intervals between two adjacent time domain positions in the M time domain positions are not equal.

[0334] In some embodiments, at least one of the M time domain positions has an associated relationship with the time domain position corresponding to the ephemeris information, or at least one of the M time domain positions is a time domain position among the time domain positions corresponding to the ephemeris information.

[0335] In some embodiments, each time domain position in the M time domain positions corresponds one-to-one to a time domain position in the time domain position corresponding to the ephemeris information.

[0336] In some embodiments, the first time period is associated with a second length, or the length of the first time period is the second length.

[0337] In some embodiments, the second length is agreed upon by a configuration or a protocol, or the second length is configured by a network device.

[0338] In some embodiments, the second length is configured by the network device through at least one of a system message, an RRC message, a MAC CE, and a DCI; or,

[0339] The second length is predefined or agreed upon by a protocol.

[0340] In some embodiments, the first information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0341] In some embodiments, the content included in the first information is determined based on the second information.

[0342] In some embodiments, the second information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

[0343] In some embodiments, the second information is used to determine whether the scenario corresponding to the network device is a geosynchronous orbit GEO scenario or a non-GEO scenario, wherein the content included in the first information in the GEO scenario is different from the content included in the first information in the non-GEO scenario.

[0344] In some embodiments, the first information is associated with at least one of the following information:

[0345] Time information, ephemeris information format, ephemeris information, group identifier, reference signal index, cell identifier, antenna polarization mode, satellite identifier, serving satellite, service duration of the serving satellite, satellite that will provide service, time when the satellite that will provide service starts, satellite that will stop providing service, time when the satellite that will stop providing service stops providing service.

[0346] In some embodiments, the 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 processing unit may be one or more processors.

[0347] It should be understood that the network device 400 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 and other operations and / or functions of each unit in the network device 400 are respectively to implement Figure 8 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described in detail here.

[0348] Fig.12 It is a schematic structural diagram of a communication device 500 provided in an embodiment of the present application. Fig.12 The communication device 500 shown includes a processor 510, and the processor 510 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0349] In some embodiments, Fig.12 As shown, the communication device 500 may further include a memory 520. The processor 510 may call and run a computer program from the memory 520 to implement the method in the embodiment of the present application.

[0350] The memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .

[0351] In some embodiments, Fig.12 As shown, the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0352] The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, and the number of the antennas may be one or more.

[0353] In some embodiments, the communication device 500 may specifically be a network device of an embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0354] In some embodiments, the communication device 500 may specifically be a terminal device of an embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0355] Fig.13 It is a schematic structural diagram of the device of an embodiment of the present application. Fig.13 The device 600 shown includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0356] In some embodiments, Fig.13 As shown, the apparatus 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0357] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0358] In some embodiments, the apparatus 600 may further include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0359] In some embodiments, the apparatus 600 may further include an output interface 640. The processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0360] In some embodiments, the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0361] In some embodiments, the apparatus can be applied to the terminal device in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the terminal device in the various methods in the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0362] In some embodiments, the device mentioned in the embodiments of the present application may also be a chip, for example, a system-on-chip, a system-on-chip, a chip system, or a system-on-chip chip.

[0363] Fig.14 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. Fig.14As shown, the communication system 700 includes a terminal device 710 and a network device 720 .

[0364] Among them, the terminal device 710 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 720 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0365] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. 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.

[0366] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0367] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be 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 link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0368] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0369] In some embodiments, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0370] In some embodiments, the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0371] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0372] 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 the sake of brevity, they will not be repeated here.

[0373] 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 enable the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0374] The embodiment of the present application also provides a computer program.

[0375] In some embodiments, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0376] In some embodiments, the computer program can be applied to the terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0377] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0378] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0379] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0380] 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 distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0381] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0382] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. In view of such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0383] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first information sent by the network device; wherein the first information is associated with a first time period, and the first information is used to obtain at least one of the following information: The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

2. The method according to claim 1, characterized in that The first information is associated with the first time period, including: The first information is associated with M time domain positions included in the first time period, where M is a positive integer and is greater than or equal to 1.

3. The method according to claim 2, characterized in that The first information is used to obtain at least one of the following information: The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

4. The method according to claim 3, characterized in that The method further comprises: The terminal device obtains the first timing values ​​corresponding to the M time domain positions based on the first information.

5. The method according to claim 4, characterized in that The first information is used to obtain a first timing value corresponding to at least one of the M time domain positions, an offset rate of the first timing value corresponding to at least one of the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

6. The method according to any one of claims 1 to 5, characterized in that The first time period is associated with a second length, or the length of the first time period is the second length.

7. The method according to claim 6, characterized in that The second length is configured by the network device through at least one of a system message, an RRC message, a MAC CE, and a DCI; or, The second length is predefined or agreed upon by a protocol.

8. The method according to any one of claims 1 to 7, characterized in that The first information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

9. The method according to any one of claims 1 to 8, characterized in that The first information is associated with at least one of the following information: Time domain position information, ephemeris information format, ephemeris information, group identifier, reference signal index, cell identifier, antenna polarization mode, satellite identifier, serving satellite, service duration of the serving satellite, satellite that will provide service, time when the satellite that will provide service starts, satellite that will not provide service, time when the satellite that will not provide service stops providing service.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: The terminal device obtains time domain and / or frequency domain synchronization corresponding to at least one time domain position corresponding to the first time period based on the first information.

11. A wireless communication method, characterized in that: include: The network device sends first information to the terminal device, wherein the first information is associated with a first time period; wherein, The first information is used to obtain at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a rate of change of the offset rate of the first frequency offset value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period; or, The first information includes at least one of the following information: The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

12. The method according to claim 11, characterized in that The first information is associated with the first time period, including: The first information is associated with M time domain positions included in the first time period, where M is a positive integer and is greater than or equal to 1.

13. The method according to claim 12, characterized in that The first information is used to obtain at least one of the following information: The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the change rate of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency offset value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency offset value corresponding to one or more time domain positions among the M time domain positions, and the change rate of the offset rate of the first frequency offset value corresponding to one or more time domain positions among the M time domain positions; or, The first information includes at least one of the following information: The first timing value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the rate of change of the offset rate of the first timing value corresponding to one or more time domain positions among the M time domain positions, the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions, and the rate of change of the offset rate of the first frequency deviation value corresponding to one or more time domain positions among the M time domain positions.

14. The method according to claim 13, characterized in that The first information is used to obtain a first timing value corresponding to at least one time domain position among the M time domain positions, an offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one time domain position among the M time domain positions; or, The first information includes a first timing value corresponding to at least one of the M time domain positions, an offset rate of the first timing value corresponding to at least one of the M time domain positions, and a rate of change of the offset rate of the first timing value corresponding to at least one of the M time domain positions.

15. The method according to any one of claims 11 to 14, characterized in that The first time period is associated with a second length, or the length of the first time period is the second length.

16. The method according to claim 15, characterized in that The second length is configured by the network device through at least one of a system message, an RRC message, a MAC CE, and a DCI; or, The second length is predefined or agreed upon by a protocol.

17. The method according to any one of claims 11 to 16, characterized in that The first information is configured by the network device through at least one of a system message, an RRC message, and a MAC CE.

18. The method according to any one of claims 11 to 17, characterized in that The first information is associated with at least one of the following information: Time domain position information, ephemeris information format, ephemeris information, group identifier, reference signal index, cell identifier, antenna polarization mode, satellite identifier, serving satellite, service duration of the serving satellite, satellite that will provide service, time when the satellite that will provide service starts, satellite that will not provide service, time when the satellite that will not provide service stops providing service.

19. A terminal device, characterized in that: include: A communication unit, configured to receive first information sent by a network device; wherein the first information is associated with a first time period, and the first information is used to obtain at least one of the following information: The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

20. A network device, characterized in that: include: A communication unit, configured to send first information to a terminal device, wherein the first information is associated with a first time period; wherein: The first information is used to obtain at least one of the following information: a first timing value, an offset rate of the first timing value, a rate of change of the offset rate of the first timing value, a first frequency offset value, an offset rate of the first frequency offset value, a rate of change of the offset rate of the first frequency offset value, first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period; or, The first information includes at least one of the following information: The first timing value, the offset rate of the first timing value, the rate of change of the offset rate of the first timing value, the first frequency deviation value, the offset rate of the first frequency deviation value, the rate of change of the offset rate of the first frequency deviation value, the first ephemeris information, the first time period, and one or more time domain positions corresponding to the first time period.

21. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 10.

22. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 11 to 18.

23. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 10.

24. A chip, characterized in that: The method comprises: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 11 to 18.

25. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 10.

26. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 11 to 18.

27. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 10.

28. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 11 to 18.

Images