Communication methods, terminal equipment, and network equipment

Abstract

To provide a communication method, terminal equipment, and network equipment that minimizes communication anomalies caused by satellite changes. [Solution] The method includes the step of a terminal device performing a first operation based on a first time, where the first time is the time of satellite change corresponding to the first cell of the terminal device, and the first operation includes one or more of a second operation performed after the terminal device has started using the ephemeris information of the changed satellite, and a third operation performed by the terminal device in response to the satellite change of the first cell. By performing the first operation, the terminal device can respond to the satellite change. For example, if the first operation includes the second operation, the terminal device can determine from what time it will start using the ephemeris information of the changed satellite based on the satellite change time, thereby making the use of the ephemeris information more in line with the actual situation.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and more specifically, to methods, terminal devices, and network devices for communication.

Background Art

[0002] With the development of technology, non-terrestrial network (NTN) communication emerges according to the trend of the times. NTN communication can be realized based on satellites or other non-terrestrial communication devices. Therefore, in some embodiments, NTN communication may also be referred to as satellite communication. Since satellites are movable, even if the terminal device is not moving, the satellite providing services to the terminal device can be changed. In related technologies, in some cases, how the terminal device responds to the change of satellites has not been proposed.

Summary of the Invention

Problems to be Solved by the Invention

[0003] This application provides a method, a terminal device, and a network device for communication. Hereinafter, each aspect according to this application will be described.

Means for Solving the Problems

[0004] In a first aspect, it includes the step of a terminal device executing a first operation based on a first time, where the first time is the time of satellite change corresponding to a first cell of the terminal device, and the first operation includes one or more of a second operation executed after the terminal device starts using the ephemeris information of the changed satellite and a third operation executed by the terminal device in response to the satellite change of the first cell, and provides a method for communication.

[0005] A second aspect provides a communication method comprising the steps of: a network device determining a first time, wherein the first time is the time of change of the satellite corresponding to a first cell of a terminal device; and the network device configuring, based on the first time, one or more of the following: ephemeris information of the changed satellite and a first operation performed by the terminal device based on the first time, wherein the first operation includes one or more of the following: a second operation performed after the terminal device has begun using the ephemeris information of the changed satellite and a third operation performed by the terminal device in response to the change of the satellite of the first cell.

[0006] In a third aspect, a terminal device is provided, which includes an execution unit for performing a first operation based on a first time, where the first time is the time of satellite change corresponding to a first cell of the terminal device, and the first operation includes one or more of a second operation performed after the terminal device begins using ephemeris information of the changed satellite, and a third operation performed by the terminal device in response to the satellite change of the first cell.

[0007] In a fourth aspect, a network device is provided, comprising: a determination unit for determining a first time, wherein the first time is the time of change of the satellite corresponding to the first cell of the terminal device; and a configuration unit for configuring one or more of the following based on the first time: ephemeris information of the changed satellite and a first operation performed by the terminal device based on the first time. The first operation includes one or more of the following: a second operation performed after the terminal device begins to use the ephemeris information of the changed satellite and a third operation performed by the terminal device in response to the change of the satellite of the first cell.

[0008] In a fifth embodiment, the present invention provides a terminal device comprising memory and a processor, wherein the memory is used to store one or more computer programs, and the processor calls the computer programs in the memory and causes the terminal device to perform some or all of the steps in the method of the first embodiment.

[0009] In the sixth aspect, a network device is provided, comprising memory and a processor, wherein the memory is used to store one or more computer programs, and the processor calls the computer programs in the memory and causes the network device to perform some or all of the steps in the method of the second aspect.

[0010] In the seventh embodiment, an embodiment of the present application provides a communication system including the above-described terminal and / or network equipment. In other possible designs, the system may further include other equipment that interacts with the terminal or network equipment in the solution according to the embodiment of the present application.

[0011] In the eighth aspect, an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored causing terminal equipment and / or network equipment to perform some or all of the steps in the methods of each of the above aspects.

[0012] In the ninth embodiment, an embodiment of the present application provides a computer program product comprising a non-temporary computer-readable storage medium storing an operable computer program that causes terminal and / or network equipment to perform some or all of the steps of the methods of each of the above embodiments. In some implementations, the computer program product may be a single software installation package.

[0013] In the tenth embodiment, the embodiment of the present application includes a memory and a processor, the processor being able to call and execute a computer program from the memory, thereby providing a chip that accomplishes some or all of the steps described in the manner of each of the above embodiments.

[0014] According to the present invention, terminal equipment can respond to a satellite change by performing a first operation. For example, if the first operation includes an operation performed after the terminal equipment has started using the ephemeris information of the changed satellite (i.e., a second operation), the terminal equipment can determine from what time it will start using the ephemeris information of the changed satellite based on the time of the satellite change, thereby making the use of the ephemeris information more in line with the actual situation. For example, if the first operation includes an operation performed by the terminal equipment in response to the satellite change (i.e., a third operation), the terminal equipment can avoid communication anomalies caused by the satellite change as much as possible by performing the third operation. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of a wireless communication system applied to one embodiment of the present invention. [Figure 2A] This is a schematic diagram of NTN communication in bent pipe mode. [Figure 2B] This is a schematic diagram of NTN communication in playback mode. [Figure 3A] This is a schematic diagram of a moving cell. [Figure 3B] This is a schematic diagram of a fixed cell. [Figure 4] This is a schematic diagram of the satellite change process, where the PCI (Philippine PCI) is not modified. [Figure 5] This is a schematic diagram that determines the satellite's position at a given time using ephemeris information. [Figure 6] This is a schematic diagram showing how network devices provide new ephemeris information before the current ephemeris information expires. [Figure 7] This is a schematic diagram showing the effective time of ephemeris information corresponding to the changed satellite. [Figure 8] This is a schematic flowchart of the communication method according to the embodiment of the present application. [Figure 9] This is a schematic diagram that implicitly indicates whether or not the first ephemeris information can be associated with a new satellite. [Figure 10]It is a schematic diagram of an ephemeris information list according to an embodiment of the present application. [Figure 11] It is a diagram showing an example of subframe boundary jitter according to an embodiment of the present application. [Figure 12] It is a diagram showing an example of an RLM process based on a second counter and a first timer. [Figure 13] It is a schematic structural diagram of a terminal device according to an embodiment of the present application. [Figure 14] It is a schematic structural diagram of a network device according to an embodiment of the present application. [Figure 15] It is a schematic structural diagram of a communication device according to an embodiment of the present application.

Embodiments for Carrying Out the Invention

[0016] The following will describe the technical solution of the present application with reference to the drawings.

[0017] Communication system

[0018] FIG. 1 is a wireless communication system 100 applied to an embodiment of the present application. The wireless communication system 100 may include communication devices. The communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0019] FIG. 1 exemplarily shows one network device and two terminals. Optionally, the wireless communication system 100 may include a plurality of network devices, and within the coverage area of each network device, any number of other terminal devices may be included, and the embodiments of the present application do not limit this.

[0020] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobile management entity, and the embodiments of the present application do not limit this.

[0021] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as 5th generation (5G) systems, new radio (NR), long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, and LTE time division duplex (TDD) systems. The technical solutions of this application can also be applied to future communication systems such as 6th generation mobile communication systems and satellite communication systems.

[0022] In the embodiments of this application, terminal equipment may also be called user equipment (UE), access terminal, user unit, user station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, terminal equipment, terminal, wireless communication device, user agent, or user device. In the embodiments of this application, terminal equipment may refer to equipment that provides voice and / or data connectivity to a user, and can be used to connect humans, objects, and machines, such as handheld devices and in-vehicle devices with wireless connectivity. The terminal equipment in the embodiments of this application may include mobile phones, tablet PCs (Pads), notebook computers, palmtop computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes. Optionally, the UE can function as a base station. For example, the UE can function as a scheduling entity and provide sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D) communication. For example, a cellular phone and a car communicate with each other using sidelink signals. There is no need for base stations to relay communication signals; cellular phones and smart home devices communicate directly with each other.

[0023] The network equipment in the embodiments of this application may be equipment for communicating with terminal equipment. The network equipment may also include access network equipment. Access network equipment provides communication coverage to a specific geographic area and can communicate with terminal equipment 120 located within the coverage area. Access network equipment may also be called radio access network equipment or base stations, etc. The access network equipment in the embodiments of this application may be a radio access network (RAN) node (or equipment) that provides terminal equipment to a radio network. Access network equipment broadly covers various names such as NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, radio node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), and positioning node, or these names may be replaced by other names. A base station may be a macro base station, a micro base station, a relay node, a donor node, or something similar, or a combination thereof. A base station may further refer to a communication module, modem, or chip installed within the aforementioned equipment or device.A base station may also be a mobile switching center and equipment that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, network-side equipment in a 6G network, or equipment that performs base station functions in future communication systems. A base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technologies and specific equipment forms employed in the access network equipment.

[0024] Base stations may be fixed or mobile. For example, a helicopter or drone may be configured as a mobile base station, with one or more cells moving according to the location of the mobile base station. In another example, a helicopter or drone may be configured as equipment for communicating with another base station.

[0025] Communication equipment related to a wireless communication system may include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented by equipment; that is, core network elements are core network equipment. It should be understood that core network equipment may also be network equipment.

[0026] The core network elements in the embodiments of this application may include network elements that process and forward user signaling and data. For example, the core network equipment may include core access and mobility management function (AMF), session management function (SMF), user plane gateway, location management function (LMF), and other core network equipment. The user plane gateway may be a server that has functions such as mobility management, routing, and forwarding for user plane data, and is generally located on the network side, such as a serving gateway (SGW), packet data network gateway (PGW), or user plane function entity (UPF). Naturally, the core network may include other network elements, which will not be listed here.

[0027] In some deployments, the network equipment in the embodiments of the present invention refers to a CU or DU, or the network equipment may include both a CU and a DU. The gNB may further include an AAU.

[0028] Network equipment and terminal equipment may be configured on land, including indoors or outdoors, handheld or vehicle-mounted, on water, or in the air on airplanes, balloons, or satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0029] It should be understood that all or some of the functions of the communication equipment in this application may be implemented by software functions running on the hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0030] Non-terrestrial network (NTN)

[0031] In conventional technology, cellular communication network base stations can be built at relatively high locations on the ground, such as rooftops or mountaintops, to cover a wider area. The radius of the base station coverage area may range from several hundred meters to 100 kilometers. The coverage area may also depend on the frequency band. For example, the coverage area of ​​base stations in the low frequency band (e.g., 700 MHz) may be relatively large. The coverage area of ​​base stations in the high frequency band (24 GHz) may be relatively small. Urban areas or suburbs have relatively high population densities. Using such ground base stations, the coverage area of ​​each base station may include more terminal equipment. Therefore, coverage with such ground base stations is very efficient in urban areas and suburbs. However, in order to achieve coverage, even in rural areas with low population density, operators must build base stations at regular intervals (e.g., 100 kilometers). Therefore, using such ground base stations for coverage in rural areas is inefficient and costly. Furthermore, with the development of cellular communication networks and advancements in technologies such as the Internet of Things, the need for coverage in areas rarely visited by people is becoming increasingly serious. For example, cellular communication networks need to enable monitoring of the operation of oil pipelines in rough terrain and communication support for ocean-going cargo ships. However, the aforementioned ground base stations cannot support such scenarios.

[0032] To address the above problem, NTN communications will emerge as needed. NTN communications can be implemented based on satellites or other non-terrestrial communication equipment. Therefore, in some embodiments, NTN communications may be called satellite communications.

[0033] Depending on the configuration of the wireless network equipment, NTN communication may be divided into two modes: vent pipe mode and regenerative mode.

[0034] Figure 2A is a schematic diagram of NTN communication in bent-pipe mode. As shown in Figure 2A, in bent-pipe mode, the base station is configured on the ground, and the satellite can act as a single repeater. For downlink communication, the downlink signal transmitted from the base station is transmitted to the satellite via a gateway (GW). The downlink signal is then transmitted to ground terminal equipment via the satellite, which acts as a special repeater. For uplink communication, the uplink signal transmitted from the terminal is transmitted to the ground gateway via the satellite, which acts as a special repeater, and then transmitted to the base station. The core network gateway allows the base station to transmit the uplink signal to the external network.

[0035] Figure 2B is a schematic diagram of NTN communication in regenerative mode. As shown in Figure 2B, in regenerative mode, the base station is configured as a satellite. The core network element transmits data with the base station on the satellite via a gateway. Terminal equipment transmits data directly with the base station on the satellite.

[0036] Unlike terrestrial communication systems, satellites can constantly move along a predetermined orbit. In this case, the ground coverage of the cell corresponding to the satellite may be moving or fixed. Depending on whether the cell is moving or not, the basic modes of the cell corresponding to the satellite may include moving cells or fixed cells.

[0037] For mobile cells, the cell's coverage moves on the ground as the satellite moves. Figure 3A is a schematic diagram of a mobile cell. As shown in Figure 3A, when the satellite is at position 1, the cell's coverage range is range 1, and when the satellite is at position 2, the cell's coverage range is range 2. When the satellite moves from position 1 to position 2, the cell's coverage range corresponding to the satellite changes from range 1 to range 2. As shown in Figure 3A, range 1 and range 2 correspond to different coverages. When the cell mode is a mobile cell, the satellite implementation is relatively simple. The tilt angle of the satellite's antenna to the ground can be changed. However, the implementation of terminal equipment is relatively complex.

[0038] For fixed cells, the cell coverage does not change with the satellite's movement. In other words, the cell's coverage range hardly changes with the satellite's movement. Figure 3B is a schematic diagram of a fixed cell. When the satellite is at position 1, the cell's coverage range is range 1, and when the satellite is at position 2, the cell's coverage range is range 2. As shown in Figure 3B, the coverage corresponding to range 1 and range 2 is almost the same. When the cell mode is a fixed cell, the satellite implementation is relatively complex. The satellite needs to adjust the tilt angle of its antenna to the ground according to its physical position. However, the implementation of terminal equipment is relatively simple.

[0039] Furthermore, the satellite division method and the cell division method described above are relatively independent. In other words, the two division methods can be combined arbitrarily. For example, there are four possible combinations: bent pipe mode + mobile cell, bent pipe mode + fixed cell, regenerative mode + mobile cell, and regenerative mode + fixed cell.

[0040] Satellite change

[0041] Because satellites are mobile, the satellite providing service to terminal equipment can change even if the terminal equipment itself remains stationary. Taking the combination of vented pipe mode and a fixed cell as an example, several communication protocols (e.g., 3GPP® protocols) employ solutions that ensure the physical cell identifier (PCI) remains unchanged. For terminal equipment, as the original satellite moves away and a new satellite enters the network, the base station cannot change, but all configurations (including the PCI) adopted by the cell can. Such a solution is equivalent to replacing only one repeater, and changing the repeater does not involve any changes to the protocol stack. Based on this, this process can be called a type of switching, but not strictly speaking a switching in the true sense.

[0042] Figure 4 is a schematic diagram of a satellite change process in which the PCI does not change. Before the satellite change time on the time axis, the terminal equipment (shown as UE in Figure 4) is connected to the first satellite, and the PCI of the cell corresponding to the first satellite is the first PCI. After the satellite change time, the base station changes the satellite to the second satellite, and the terminal equipment begins transmitting data via the second satellite. The PCI of the cell corresponding to the second satellite does not change and remains the first PCI. Although the satellite has been changed, the entire configuration of the base station does not change, so all radio configuration parameters of the terminal equipment do not need to be changed.

[0043] Ephemeris Information

[0044] In conventional technology, an NTN cell can notify terminal equipment of satellite-related positional information via ephemeris information. The terminal equipment can estimate the satellite's current position based on the ephemeris information. The ephemeris information can be transmitted by a system information broadcast (SIB) 19.

[0045] In some embodiments, the ephemeris information may include one or more of the following: a reference time, modified parameters, and a validity period. As shown in Figure 5, the ephemeris information acquired by the terminal device includes a reference time T1, a validity period of the ephemeris information (T2-T1), and modified parameters. Based on this information, the terminal device can calculate the satellite position at any time within the period from T1 to T2. For example, for time T3, the terminal device can determine the satellite position at time T3 based on the satellite position at time T1, the length of the period from time T3 to reference time T1 (T3-T1), and modified parameters.

[0046] Network devices can provide ephemeris information to terminal devices before the reference time, and can also provide ephemeris information to terminal devices after the reference time. Furthermore, network devices can provide updated ephemeris information to terminal devices before the current ephemeris information expires.

[0047] Figure 6 is a schematic diagram illustrating how network equipment provides new ephemeris information before the current ephemeris information expires. For convenience of distinction, the ephemeris information before the update is called the original ephemeris information, and the ephemeris information after the update is called the new ephemeris information. As shown in Figure 6, the original ephemeris information expires at time T2. Before time T2, network equipment can provide new ephemeris information to terminal equipment. The reference time for the new ephemeris information is T1'. Therefore, during the period from T1' to T2, terminal equipment can use two sets of ephemeris information. When terminal equipment calculates the physical position of a satellite via ephemeris information, the physical position of the same satellite calculated via these two sets of ephemeris information is not necessarily the same, but it can be considered valid and equivalent within a certain range of accuracy. Therefore, terminal equipment can arbitrarily select one set of ephemeris information.

[0048] In related technologies, how terminal equipment should respond to satellite changes has not yet been proposed. For example, differences in radio signal quality measured by terminal equipment may occur before and after a satellite change, and how to address these differences has not been proposed in related technologies. Alternatively, when a satellite changes, how terminal equipment should use ephemeris information has not been proposed in related technologies. Below, we will analyze the problems that this application aims to solve, using the use of ephemeris information after a satellite change as an example.

[0049] The effective time of the ephemeris information for the modified satellite (hereinafter referred to as the new satellite) can fall into three cases, as shown in Figure 7. All three of these cases have numerous problems.

[0050] Case 1: The effective time of the new satellite ephemeris is earlier than the satellite change time.

[0051] In Case 1, a terminal device may have two valid ephemeris information entries within a certain period. For example, this period refers to the time when the ephemeris validity period for a new satellite has passed, but the satellite has not yet been changed. During this time, no satellite change occurs, so the terminal device should use the ephemeris information of the previous satellite (hereinafter referred to as the original satellite). However, according to the relevant technology, the terminal device can arbitrarily select and use one ephemeris information entry. In the "PCI does not change" solution, if the cell's radio configuration is not changed during the satellite change process, the radio parameters of the terminal device cannot be changed either. However, there is a significant difference between the ephemeris information of the two satellites. Therefore, arbitrarily selecting one ephemeris information entry could result in the terminal device already using the ephemeris information of the new satellite even though the satellite has not yet been changed. In other words, the terminal device may use ephemeris information that does not correspond to the current satellite, resulting in communication anomalies.

[0052] Case 2: The effective time of the new satellite ephemeris is equal to the satellite change time.

[0053] In Case 2, terminal devices can immediately use the new ephemeris information after the satellite change time. However, this solution imposes significant constraints on the provision of ephemeris information. For example, the network side must forcibly synchronize the effective time of the new satellite ephemeris with the satellite change time; otherwise, the solution cannot be implemented. However, synchronizing the effective time of the new satellite ephemeris with the satellite change time complicates the implementation of network equipment.

[0054] Case 3: The effective time of the new ephemeris is later than the satellite change time.

[0055] In Case 3, after the satellite change time, the terminal device can only use the ephemeris information after the new satellite's ephemeris information becomes effective. In other words, in Case 3, there is no ephemeris information available for use by the terminal device during the period between the satellite change time and the effective time of the new ephemeris information.

[0056] Figure 8 is a schematic flowchart of a communication method according to an embodiment of the present invention used to solve the above problem. The method shown in Figure 8 may be performed by terminal equipment. The method shown in Figure 8 may include step S810.

[0057] In step S810, the terminal device performs the first operation based on the first time.

[0058] The first time point may be the satellite change time corresponding to the first cell of the terminal equipment. Before the first time point, the satellite corresponding to the first cell is the satellite before the change (i.e., the original satellite). After the first time point, the satellite corresponding to the first cell is the satellite after the change (i.e., the new satellite). The PCI of the first cell does not need to be changed before or after the satellite change. The first cell may also be the service cell (or referred to as the main cell) of the terminal equipment.

[0059] The first operation may include the second and / or third operations. The second operation may be performed after the terminal device has begun using the ephemeris information of a new satellite. The third operation may be performed by the terminal device in response to a change in satellite.

[0060] When a terminal device performs a second operation based on a first time, the terminal device can determine, based on the satellite change time, from what time it will start using the new satellite's ephemeris information before performing the second operation. In other words, it can determine that the time of use of the new satellite's ephemeris information and the time of the new satellite's ephemeris information's effective date do not necessarily coincide. Therefore, according to this invention, the use of ephemeris information can be made to more closely match actual circumstances and avoid the problem described above where the start time of use of the new satellite's ephemeris information is related only to the effective date. For example, in Case 1 shown in Figure 7, the terminal device can determine how to use the new satellite's ephemeris information based on the first time, thereby avoiding the use of the new satellite's ephemeris information without performing a satellite change.

[0061] Before the satellite change time, network equipment can provide terminal equipment with ephemeris information for the new satellite. The effective time of the new satellite ephemeris information may be earlier than the satellite change time. In this case, terminal equipment can start using the new ephemeris information as soon as possible based on the first time (for example, starting to use the new ephemeris information from the first time), thereby avoiding the situation where terminal equipment has no usable ephemeris information after the satellite change. For example, in Case 2 or Case 3 shown in Figure 7, the ephemeris information for the new satellite may be transmitted in advance before the first time, so that the ephemeris information for the new satellite becomes effective earlier than the first time (i.e., improving Case 1). At the first time, terminal equipment can start using the ephemeris information for the new satellite. On the one hand, this solution can avoid the time synchronization requirement in Case 2, thereby simplifying the implementation of the communication process. On the other hand, terminal equipment can use the ephemeris information for the new satellite as soon as possible after the satellite change time, thereby reducing the length of the communication interruption time.

[0062] The first operation may be any operation that any terminal device needs to perform based on ephemeris information. For example, the first operation may include one or more of the following: calculating the satellite position, calculating the time to transmit an uplink signal to the satellite, transmitting the uplink signal, and calculating the timing advance (TA). The uplink signal may include, for example, a random access preamble. In other words, the first operation may further include random access. The terminal device performing the first operation using the ephemeris information may be understood as the terminal device using the ephemeris information, or the terminal device being able to perform the first operation based on the ephemeris information.

[0063] In response to a satellite change, terminal equipment can perform a third operation. This third operation may be related to ephemeris information. It should be understood that the third operation is advantageous for both the satellite change and / or communications after the satellite change. For example, performing the third operation can ensure a smooth satellite change. Alternatively, the third operation can prevent communication anomalies after the satellite change.

[0064] The second and third operations will be explained below. The time at which the terminal device begins to perform the second operation based on the new satellite's ephemeris information may be the usage time. In some embodiments, the usage time may be equal to the first time. In other words, the terminal device can begin using the new satellite's ephemeris information at the satellite change time. That is, the terminal device does not use the new satellite's ephemeris information before the satellite change time, and uses the new satellite's ephemeris information after the satellite change time. An understandable point is that this way the situation of using the new satellite's ephemeris information before the satellite change can be avoided.

[0065] In some embodiments, the time at which the terminal device stops using the original satellite's ephemeris information may be equal to the first time step. In other words, before the satellite change time, the terminal device uses the original satellite's ephemeris information. After the satellite change time, the terminal device does not use the original satellite's ephemeris information. In this case, even if the validity period of the original satellite's ephemeris information does not time out, the terminal device does not need to use the original satellite's ephemeris information at the satellite change time, thereby avoiding the erroneous use of the original satellite's ephemeris information after changing to a new satellite.

[0066] In some embodiments, the method shown in Figure 8 may be performed by network equipment. The method shown in Figure 8 may include steps S802 and S804.

[0067] In step S802, the network equipment determines the first time.

[0068] In step S804, the network device configures one or more of the following based on the first time: ephemeris information for a new satellite and a first operation. In some embodiments, the method shown in Figure 8 may further include step S805. In step S805, the network device may transmit the first ephemeris information to a terminal device.

[0069] Terminal equipment can determine whether the received first ephemeris information can be associated with a new satellite. In some embodiments, terminal equipment can determine whether the first ephemeris information can be associated with a new satellite based on instructions from network equipment. Whether the first ephemeris information can be associated with a new satellite can be indicated explicitly or implicitly. Different forms are described below.

[0070] Network equipment can transmit first instruction information to terminal equipment when it explicitly indicates whether or not the first ephemeris information can be associated with a new satellite. The first instruction information may be used to indicate whether or not the first ephemeris information can be associated with a new satellite.

[0071] This application does not limit the method of indicating the first instruction information. For example, the first instruction information may belong to the first ephemeris information. Alternatively, the first instruction information and the first ephemeris information may be carried in different messages.

[0072] In some embodiments, the first instruction information may be carried in the first bit. In other words, the first instruction information may be represented by one bit. For example, the first instruction information may be represented by one bit of the first ephemeris information. In possible realizations, if the value of the first bit is 0, the first ephemeris information is not associated with a new satellite or the first ephemeris information is associated with the original satellite; if the value of the first bit is 1, the first ephemeris information is associated with a new satellite or the first ephemeris information is not associated with the original satellite. In another possible realization, if the value of the first bit is 1, the first ephemeris information is not associated with a new satellite or the first ephemeris information is associated with the original satellite; if the value of the first bit is 0, the first ephemeris information is associated with a new satellite or the first ephemeris information is not associated with the original satellite.

[0073] In some embodiments, the first indication information may be carried by a first parameter. The first parameter may be a Boolean parameter. In other words, the first indication information can be indicated by a Boolean parameter. For example, the first parameter may be one parameter of the first ephemeris information. The value of the first parameter may be true or false. In possible realizations, if the value of the first parameter is true, the first ephemeris information is not associated with a new satellite or is associated with the original satellite; if the value of the first parameter is false, the first ephemeris information is associated with a new satellite or is not associated with the original satellite. In another possible realization, if the value of the first parameter is false, the first ephemeris information is not associated with a new satellite or is associated with the original satellite; if the value of the first parameter is true, the first ephemeris information is associated with a new satellite and the first ephemeris information is not associated with the original satellite.

[0074] In some embodiments, the first instruction information may be optional, that is, the first instruction information may or may not be present in a first message that can carry the first instruction information. For example, if the terminal device does not receive instruction information for the first time, the first message may not contain the first instruction information, and / or if the terminal device receives substantial information for the first time, the first message may contain the first instruction information. Alternatively, if the terminal device receives instruction information for the first time, the terminal device may receive the first instruction information, and / or if the terminal device does not receive instruction information for the first time, the terminal device may not receive the first instruction information.

[0075] The message carrying the instruction information for the first time may be the first message, or it may be a second message different from the first message. The first message or the second message may include, for example, a broadcast message and / or a radio resource control (RRC) message. The broadcast message may be, for example, an SIB19 message. The broadcast message may be used to instruct terminal equipment in an idle or connected state with the above information. A dedicated RRC message may be used to instruct terminal equipment in a connected state with the above information.

[0076] The above describes how to explicitly indicate whether the first ephemeris information can be associated with a new satellite; however, the following describes how to indicate this implicitly.

[0077] In some embodiments, the effective time of the first ephemeris information may be the second time zone. Whether or not the first ephemeris information is associated with a new satellite may be determined based on the second time zone.

[0078] Figure 9 is a schematic diagram that implicitly indicates whether the first ephemeris information is associated with a new satellite. As shown in Figure 9, if the difference between the second time point and the first time point is less than or equal to the first time length threshold, the first ephemeris information may be associated with a new satellite, and / or, if the difference between the second time point and the first time point is greater than the first time length threshold, the first ephemeris information may be associated with the original satellite. In this case, the second time point may be earlier than the first time point.

[0079] This application does not limit the method for determining the first time length threshold. For example, the first time length threshold may be determined or indicated by one or more of the following: protocol definition, RRC messages, medium access control control element (MACCE), and down link control information (DCI). Alternatively, for example, the first time length threshold may be indicated via a broadcast message. When obtaining the first time length threshold via an RRC message, a terminal device may obtain the first time length threshold via an RRC message from the current cell (e.g., the first cell) or via an RRC message from another cell. Broadcast messages may include SIB messages. RRC messages may be dedicated RRC messages.

[0080] In some embodiments, network equipment can instruct a satellite corresponding to a first adjacent region to become the satellite corresponding to a first cell. Since the satellite's orbit is known in advance, it is possible for a satellite corresponding to an adjacent cell to become the satellite corresponding to the first cell. Based on the second instruction information, terminal equipment can determine the ephemeris information of a new satellite via the ephemeris information of the adjacent cell. Therefore, network equipment does not need to separately notify the ephemeris information of the new satellite, thereby reducing the consumption of communication resources.

[0081] Network equipment can explicitly or implicitly indicate that the satellite corresponding to the first adjacent region becomes a new satellite corresponding to the first cell.

[0082] Taking explicit instructions as an example, network equipment can transmit second instruction information to terminal equipment. This second instruction information may be used to instruct the satellite corresponding to the terminal equipment's first adjacent region to become the satellite corresponding to the first cell. In other words, the second instruction information can instruct, at a first time, that the satellite corresponding to the first cell become the satellite corresponding to the first adjacent region.

[0083] The second instruction information can be indicated by methods such as a Boolean variable, a second bit, or the addition of parameters.

[0084] For example, the second instruction information can be indicated by a Boolean variable of "true" or "false". In one possible implementation, if the second instruction information is true, the satellite corresponding to the first neighboring region becomes the satellite corresponding to the first cell, and if the second instruction information is false, the satellite corresponding to the first neighboring region does not become the satellite corresponding to the first cell. In another possible implementation, if the second instruction information is false, the satellite corresponding to the first neighboring region becomes the satellite corresponding to the first cell, and if the second instruction information is true, the satellite corresponding to the first neighboring region does not become the satellite corresponding to the first cell.

[0085] Alternatively, for example, the second instruction information may be indicated by a second bit, i.e., 1 bit. The second bit may be 0 or 1. In a possible implementation, if the second instruction information is 0, the satellite corresponding to the first neighboring region becomes the satellite corresponding to the first cell, and if the second instruction information is 1, the satellite corresponding to the first neighboring region does not become the satellite corresponding to the first cell. In another possible implementation, if the second instruction information is 1, the satellite corresponding to the first neighboring region becomes the satellite corresponding to the first cell, and if the second instruction information is 0, the satellite corresponding to the first neighboring region does not become the satellite corresponding to the first cell.

[0086] In some embodiments, the second instruction information may be carried in the ephemeris information of the satellite corresponding to the first adjacent region. If the second instruction information is present in the ephemeris information of the satellite corresponding to the first adjacent region, the satellite corresponding to the first adjacent region becomes a new satellite corresponding to the first cell. If the second instruction information is not present in the ephemeris information of the satellite corresponding to the first adjacent region, the satellite corresponding to the first adjacent region does not become a new satellite corresponding to the first cell.

[0087] The ephemeris information of this cell and its neighboring cells can be indicated by an ephemeris information list. That is, an ephemeris information list may contain one or more ephemeris information entries. One or more ephemeris information entries may be associated with this cell and / or neighboring cells. Figure 10 shows an example of an ephemeris information list. An ephemeris information list as shown in Figure 10 includes the ephemeris information of this cell and the ephemeris information of three neighboring cells. As shown in Figure 10, explicit second instruction information can be added to the ephemeris information of the first neighboring cell, thereby notifying the terminal device that "from the satellite change time, the ephemeris information of the first neighboring cell becomes the ephemeris information of this cell."

[0088] As an example of an implicit instruction, the ephemeris information of the first neighboring cell may belong to an ephemeris information list. The ephemeris information list may include the ephemeris information of the service cell of the terminal device, and / or the ephemeris information lists of one or more neighboring cells of the terminal device. The position of the ephemeris information of the first neighboring cell in the ephemeris information list may be a first position. The first position may be used to indicate whether the satellite corresponding to the first neighboring cell is the satellite corresponding to the first cell. Based on this scheme, network devices do not need to transmit additional instruction information, thereby avoiding the occupation of resources by transmitting additional instruction information.

[0089] In some embodiments, if the first position satisfies a first condition, the satellite corresponding to the first neighboring cell becomes the satellite corresponding to the first cell (i.e., a new satellite). For example, the first condition may include the first position being the location of the first neighboring cell. That is, if the ephemeris information corresponding to the first neighboring cell is the ephemeris information of the first neighboring cell in the list, then the ephemeris information corresponding to the first neighboring cell becomes the ephemeris information of the new satellite. Alternatively, the first condition may include the first position being the Nth entry in a list of ephemeris information for one or more neighboring cells, i.e., the first position is the location of the Nth neighboring cell. That is, if the ephemeris information corresponding to the first neighboring cell is the ephemeris information of the Nth neighboring cell in the list, then the ephemeris information corresponding to the first neighboring cell becomes the ephemeris information of the new satellite. N may be a positive integer. N may be defined by the protocol or configured by network equipment. Taking the ephemeris information shown in Figure 10 as an example, when N=1, the adjacent cell corresponds to the satellite corresponding to the first cell. When N=2, the second adjacent cell corresponds to the satellite corresponding to the first cell. When N=3, the third adjacent cell corresponds to the satellite corresponding to the first cell.

[0090] The transmission delay times between the new satellite and the original satellite may differ. Therefore, jitter may occur at subframe boundaries (e.g., downlink subframe boundaries) for terminal equipment. In other words, for terminal equipment, the boundaries of the corresponding identical frame numbers and / or subframe numbers of the new satellite and the original satellite may not coincide. In this application, it is proposed that the fourth time zone related to the ephemeris information of the new satellite may be determined based on the subframe boundaries before or after the satellite change. Based on this, this application clarifies the subframe boundaries, thereby resolving the problem of ambiguity in the fourth time zone due to the satellite change.

[0091] Network equipment can instruct, via boundary indication information, that the basis for determining the fourth time zone is either the subframe boundary of a new satellite or the subframe boundary of the original satellite. Boundary indication information may be carried in one or more of the following: RRC messages, DCI, and MAC CE. The structure of boundary indication information may include a Boolean type, a binary symbol (1 bit), or an enumeration variable.

[0092] The fourth time zone may include one or more of the following: the expiration time of the new satellite's ephemeris information and the effective time of the new satellite's ephemeris information.

[0093] To facilitate understanding, Figure 11 is used to explain the determination of the fourth time. In the example shown in Figure 11, the terminal equipment receives ephemeris information from a new satellite. The effective time of the new satellite's ephemeris information is "frame number 583, subframe number 4," and the ephemeris information validity period is 10.24 seconds. When the terminal equipment uses this ephemeris information, it can calculate the timing advance amount TA of the uplink transmission time by using subframe number 4 of frame number 583, which corresponds to the original satellite, as the effective time. On the other hand, if calculated with an ephemeris validity period of 10.24 seconds, the ephemeris information expires after the end of the system frame number (SFN) cycle, when the frame number is 583 and the subframe number is 4. However, because the physical positions of the two satellites are different, subframe boundary jitter occurs from the perspective of the terminal equipment. If we add 10.24 seconds to the start time of the ephemeris information based on the subframe boundary when the satellite corresponding to the first cell is the original satellite, the resulting ephemeris information expiration time is shown by the solid gray line in Figure 11. However, if we use "frame number 583, subframe number 4" as the ephemeris information effective time based on the subframe boundary when the satellite corresponding to the first cell is a new satellite, then the ephemeris information expiration time should also be "frame number 583, subframe number 4," that is, the time shown by the dashed gray line in Figure 11. If the expiration times obtained by the two calculation methods differ, the protocol may specify that terminal equipment should use the solid gray line as the ephemeris information expiration time, or that terminal equipment should use the dashed gray line as the ephemeris information expiration time, or that network equipment should configure which time to use as the ephemeris information expiration time.

[0094] The third operation will be explained below.

[0095] The third operation may be associated with one or more of the following: power headroom report (PHR), TA, power adjustment value, random access, K offset, and radio link monitoring (RLM).

[0096] Furthermore, the execution time of the third operation may be associated with the first time. For example, the execution time of the third operation may be the first time, or it may be later than the first time. In other words, the terminal equipment can perform the third operation at the time of or after the satellite change. Alternatively, the execution time of the third operation may be earlier than the first time. In other words, the terminal equipment can perform the third operation in advance before the satellite change.

[0097] In some implementations, the third operation, if the terminal device triggers the first PHR before the first time step, cancels the trigger of the first PHR, triggers the second PHR, triggers the TA report, resets the power adjustment value to zero, and activates the timing advance timer. This includes some or all operations performed by the terminal device after the timer (TAT) times out, clearing the HARQ buffer, obtaining uplink synchronization by random access, resetting the first counter associated with random access to zero, incrementing or not changing one count unit if the terminal device initiated random access before the first time and continues random access after the first time, performing downlink synchronization if the downlink is not synchronized if the terminal device initiated random access before the first time and continues random access after the first time, and / or re-selecting random access resources based on the signal quality of the changed satellite, using the K offset configured by the changed satellite or a K offset with a value of 0, resetting the second counter associated with RLM to zero, and stopping the first timer associated with RLM. The above information is described below.

[0098] In some embodiments, if a terminal device triggers a first PHR before the first time step, the third operation may include canceling the trigger of the first PHR. In other words, if a terminal device has already triggered a PHR before the satellite change time, the terminal device can cancel the trigger of the existing PHR. The cancellation of the trigger of the first PHR can occur at or after the first time step.

[0099] The trigger for a PHR is when "the change in path loss exceeds a threshold compared to the path loss at the time of the previous PHR transmission." However, after a satellite change, the path loss value is unrelated to the original path loss. In such cases, the path loss that would normally trigger the PHR has no reference value for network equipment. Therefore, the trigger for the first PHR can be canceled, reducing unnecessary communication flows and simplifying communication steps.

[0100] In some embodiments, the third operation may include triggering a second PHR in response to a satellite change. For example, terminal equipment may trigger the PHR again at or after the time of the satellite change.

[0101] After a satellite change, path loss measurement for terminal equipment resumes. Therefore, triggering a second PHR after a satellite change provides a reference point for path loss measurement that is useful for the scheduling algorithms of network equipment.

[0102] In some embodiments, the third operation may include triggering a TA report. For example, the terminal equipment may trigger a TA report at or after the satellite change time.

[0103] A change in satellite causes the original TA value of the terminal equipment to become invalid. The original TA value has no reference value for the scheduling of network equipment. Therefore, the TA value reported again by the terminal equipment in this application has reference value for the scheduling algorithm of the network equipment.

[0104] Furthermore, a TA triggered in the third operation may be reported via any uplink resource, and this application does not limit this. For example, the resource reporting the TA may include one or more uplink resources acquired by the terminal device through random access, or uplink resources acquired by the terminal device through other means. Uplink resources acquired through other means may include, for example, resources allocated to the terminal device by the network device through dynamic scheduling or semi-static scheduling.

[0105] In some embodiments, the third operation may include zeroing out the power adjustment value. For example, the terminal equipment may zero out the power adjustment value at or after the satellite change time. The power adjustment value may be recorded by the terminal equipment and may be related to the terminal equipment's transmit power.

[0106] The power adjustment value may be an integrated value. For example, network equipment can adjust the power of terminal equipment in an integrated mode. That is, terminal equipment can determine the uplink transmission power based on the measured path loss and the power adjustment value that the terminal equipment has integrated and stored. In a possible implementation, the power adjustment value may be associated with, for example, transmit power control (TPC). For example, network equipment can always transmit TPC to terminal equipment, thereby notifying the terminal equipment to adjust the stored power adjustment value. In this case, the power adjustment value may include the integrated value of TPC.

[0107] When the satellite is changed, the power adjustment values ​​originally stored in the terminal equipment become invalid. The technical solution proposed in this application for zeroing out the power adjustment values ​​enables accurate recording of the power adjustment values ​​after the satellite change, thereby allowing the terminal equipment to determine the uplink transmission power suitable for the new satellite.

[0108] In some embodiments, the third operation may include some or all of the operations that the terminal equipment needs to perform after the timing advance timer (TAT) times out. That is, a satellite change can, to some extent, correspond to a TAT timeout. In this case, the third operation may include, for example, clearing the hybrid automatic repeat request (HARQ) buffer and / or obtaining uplink synchronization by random access.

[0109] If, before the first time step, the terminal device initiates random access, and after the first time step, the terminal device needs to continue random access, the third operation may be associated with the first counter. The first counter may be a counter associated with random access. For example, the first counter may include a counter for calculating the number of random accesses and / or a counter for calculating the ramping of random access power. That is, the first counter is used to calculate the number of random accesses and / or the ramping of random access power.

[0110] With respect to the first counter, the third operation may include resetting the first counter to zero, incrementing the first counter by one count unit, or leaving the first counter unchanged. That is, in the first random access after the satellite change, the first counter may start counting from zero, increment by one count unit, or remain unchanged. The count unit may be one or more smallest count units that the counter can statistically count.

[0111] If the first counter includes multiple counters, the third operation corresponding to each counter may be different or the same. For example, if the first counter includes a counter for calculating the number of random accesses and a counter for calculating the ramping of random access power, then for the first random access after a satellite change, the first counter can count using one of the modes 1 to 3 shown in Table 1.

[0112] [Table 1]

[0113] As shown in Table 1, in Mode 1, the terminal device resets all counters to zero and starts counting again from 0. In Mode 2, the terminal device can increment the counter for calculating the total number of random accesses by 1, and can also increment the counter for calculating the random access power ramping by 1. In Mode 3, the terminal device can increment the counter for calculating the total number of random accesses by 1, but can leave the counter for calculating the random access power ramping unchanged.

[0114] In some embodiments, if a terminal device initiates random access before the first time point and continues random access after the first time point, the third operation may include performing downlink synchronization if the downlink is not synchronized, and / or re-selecting random access resources based on the signal quality of the modified satellite.

[0115] If terminal equipment performs random access before the satellite change time, and continues random access after the satellite change, then the terminal equipment must ensure downlink synchronization before the first random access after the satellite change. In this case, if downlink synchronization is not present, it is proposed that the terminal equipment must first perform downlink synchronization and then random access.

[0116] If terminal equipment is performing random access before the satellite change time, and the random access resource selected by the terminal equipment is associated with signal quality, then at or after the satellite change time, the terminal equipment can re-select a random access resource based on the signal after the satellite change and continue random access. Signal quality may include, for example, reference signal received power (RSRP). In a coverage improvement scenario, different random access resource pools may correspond to different RSRP values, or different RSRPs may be supplemented to correspond to supplementary uplink (SUL) carriers or normal carriers.

[0117] Furthermore, the continuation of random access as described in this application may also refer to the continuation of random access by the medium access control (MAC) layer of the terminal device, and it is possible to continue random access regardless of RRC, that is, random access that is not triggered again by RRC.

[0118] In some embodiments, the third operation may include an operation that instructs the terminal equipment to use the K offset configured for the modified satellite after the first time step or at the first time step, or to use the K offset with a value of 0.

[0119] In one possible implementation, at the time of satellite change, before the satellite change, or after the satellite change, the MAC layer within the terminal device instructs the physical (PHY) layer to set the K offset to 0. At the time of satellite change or after the satellite change, the terminal device can use the K offset with a value of 0. In another possible implementation, before the satellite change, the terminal device receives a new K offset value instructed by the network device, and the network device may simultaneously instruct that "this new K offset value can only be used at the time of satellite change or after the satellite change." Furthermore, the MAC layer of the terminal device instructs the PHY layer to set the new K offset. At the time of satellite change or after the satellite change, the terminal device can use the K offset configured by the network device for the new satellite.

[0120] In some embodiments, once a terminal device receives a K offset indicated by a network device, it can begin using the K offset after a first time interval. If the terminal device does not receive a K offset indicated by a network identifier, it can use a K offset with a value of 0.

[0121] In some embodiments, both the second counter and the first timer may be associated with the RLM. The third operation may include resetting the second counter to zero and / or stopping the first timer.

[0122] The second counter may include, for example, a counter for the number of times a single measurement result of a wireless signal is greater than or equal to a first threshold, and / or a counter for the number of times a single measurement result of a wireless signal is less than a second threshold. The statistical value of the counter for the number of times a single measurement result of a wireless signal is greater than or equal to the first threshold can be used for comparison with N310, and the counter for the number of times a single measurement result of a wireless signal is less than a second threshold can be used for comparison with N311.

[0123] The first timer may be a timer for determining radio link failure (RLF). For example, the first timer may include a T310 timer.

[0124] To facilitate understanding of the second counter and the first timer, they are illustrated in Figure 12 below.

[0125] As shown in Figure 12, in the RLM process, the RRC of the terminal device continuously receives radio signal quality indications transmitted from the PHY layer and, based on these indications, determines whether a radio link failure has occurred in the current service cell. The radio signal quality indication may include a first indication and a second indication. The first indication may include, for example, an in-sync indication, and the second indication may include, for example, an out-of-sync indication. The first indication can indicate that the result of a single measurement of the radio signal is greater than or equal to a first threshold. The second indication can indicate that the result of a single measurement of the radio signal is less than a second threshold. When the number of times the RRC receives the second indication consecutively exceeds N310, timer T310 can be activated. If, during the execution of T310, the number of times the RRC receives the first indication consecutively exceeds N311, the radio link signal quality is considered normal and T310 is stopped. If the number of times the RRC receives the first indication consecutively does not exceed N311, T310 continues to run. If the T310 times out, it may be considered a wireless link failure.

[0126] In the flow shown in Figure 12, the second counter may be used to determine whether it is greater than N310 by statistically counting the number of second instructions received continuously, and / or to determine whether it is greater than N311 by statistically counting the number of first instructions received continuously. The first timer may include T310.

[0127] Since there is no correlation between the radio signal quality before and after the satellite change, resetting the second counter to zero and / or stopping the first timer allows the original satellite to avoid affecting the RLM process, thereby making the RLM process more accurate.

[0128] Whether or not a terminal device performs the third operation may be determined by protocol and / or the configuration of the network equipment. Continuing to refer to Figure 8, step S804 may also include the network equipment configuring the third operation based on the first time.

[0129] In some embodiments, whether or not to perform the third operation may be determined by a network device. The network device can instruct whether or not to perform the third operation via the first configuration information. The present application does not restrict the transmission or reception time of the first configuration information. For example, the transmission and reception times may be earlier or later than the first time, or equal to the first time. The above transmission and / or reception times may be defined by a protocol. Furthermore, the present application does not restrict the message that carries the first configuration information. For example, the first configuration information may be carried in one or more messages such as RRC messages, MAC CE, DCI, etc.

[0130] In some embodiments, the first configuration information includes, if the terminal device triggers a first PHR before the first time, canceling the trigger of the first PHR, triggering a second PHR, triggering a TA report, resetting the power adjustment value to zero, some or all operations performed by the terminal device after the TAT timed out, clearing the HARQ buffer, obtaining uplink synchronization by random access, and if the terminal device starts random access before the first time and continues random access after the first time, resetting a first counter associated with random access to zero. This is used to configure whether to perform one or more of the following: increment or not change one count unit; perform downlink synchronization if the downlink is not synchronized when a terminal device starts random access before the first time and continues random access after the first time; and / or reselect random access resources based on the signal quality of the changed satellite; use a K offset configured by the changed satellite or a K offset with a value of 0; reset the second counter associated with the RLM to zero; and stop the first timer associated with the RLM. The above information will be described individually below.

[0131] In some embodiments, network devices can instruct terminal devices to set a first time. For example, network devices can transmit third instruction information to terminal devices, which may be used to set a first time.

[0132] In some embodiments, the first time can be represented by a time unit indicator and / or absolute time.

[0133] A time unit may include one or more of the following: a radio frame, a subframe, a time slot, or an orthogonal frequency division multiplexing (OFDM) symbol. The identifier of the time unit may be, for example, a time unit number, an ID, etc. In other words, the first time can be represented by one or more of the following: a radio frame number, a subframe number, a time slot number, or an OFDM symbol. In some implementations, the first time may be the time that matches the identifier of the time unit indicated by the nearest future third instruction information. For example, the third instruction information may indicate the first time in the form of [frame number + subframe number]. After receiving the third instruction information, the terminal equipment can consider the time that matches the nearest future "frame number + subframe number" as the first time.

[0134] Absolute time can be expressed using one or more of the following: year, month, day, hour, minute, second, millisecond, or microsecond. For example, the first time can be expressed as June 2, 2023, 16:58:34.304 milliseconds.

[0135] Furthermore, this application does not limit the messages in which the third instruction information is carried. For example, the third instruction information may be carried in one or more of the following: RRC messages, MAC CEs, and DCIs. Also, for example, the third instruction information may be carried in broadcast messages.

[0136] The above describes in detail the method embodiment of the present application, and the following describes in detail the apparatus embodiment of the present application. It should be understood that the description of the method embodiment corresponds to the description of the apparatus embodiment, and therefore, parts not described in detail can be referred to in the previous description of the method embodiment.

[0137] Figure 13 is a schematic structural diagram of a terminal device 1300 according to an embodiment of the present application. The terminal device 1300 includes an execution unit 1310.

[0138] The execution unit 1310 is used to perform a first operation based on a first time, the first time being the time of satellite change corresponding to the first cell of the terminal device, and the first operation includes one or more of a second operation performed after the terminal device begins using the ephemeris information of the changed satellite, and a third operation performed by the terminal device in response to the satellite change of the first cell.

[0139] In some embodiments, the terminal device performs a second operation after it has started using the time of the satellite's ephemeris information after the first time.

[0140] In some embodiments, the terminal equipment stops using the ephemeris information of the satellite before the change and performs the second operation at the first time point.

[0141] In some embodiments, the terminal equipment is further used to receive first ephemeris information and to determine whether the first ephemeris information can be associated with the modified satellite.

[0142] In some embodiments, the terminal equipment is further used to receive first instruction information, which is used to indicate whether or not the first ephemeris information is associated with the modified satellite.

[0143] In some embodiments, the first instruction information may be carried in the first message, and if the terminal device does not receive the instruction information for the first time, the first message will not contain the first instruction information.

[0144] In some embodiments, the effective time of the first ephemeris information is the second time, and whether or not the first ephemeris information can be associated with the modified satellite is determined based on the second time.

[0145] In some embodiments, if the difference between the second time point and the first time point is less than or equal to the first time length threshold, the first ephemeris information is associated with the modified satellite; or, if the second time point is later than or equal to the first time point, the first ephemeris information is associated with the modified satellite.

[0146] In some embodiments, the terminal device is further used to receive a second instruction information, which is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

[0147] In some embodiments, the position of the ephemeris information of the first neighboring cell in the ephemeris information list is the first position, and whether the satellite corresponding to the first neighboring cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

[0148] In some embodiments, if the first position is the Nth in the ephemeris information list of one or more neighboring cells, the satellite corresponding to the first neighboring cell becomes the satellite corresponding to the first cell, where N is a positive integer.

[0149] In some embodiments, the fourth time zone corresponding to the ephemeris information of the modified satellite is determined based on the subframe boundary before or after the satellite change.

[0150] In some embodiments, the fourth time point includes the expiration time of the modified satellite's ephemeris information and / or the effective time of the modified satellite's ephemeris information.

[0151] In some embodiments, the third operation is associated with one or more of the following: Power Headroom Reporting (PHR), Timing Advance (TA), Power Adjustment Value, Random Access, K Offset, and Radio Link Monitoring (RLM).

[0152] In some embodiments, the third operation, if the terminal device triggers the first PHR before the first time step, cancels the trigger of the first PHR, triggers the second PHR, triggers a TA report, resets the power adjustment value to zero, clears some or all operations performed by the terminal device after the timing advance timer TAT times out, clears the hybrid auto retransmission request HARQ buffer, obtains uplink synchronization by random access, and if the terminal device initiates random access before the first time step and continues random access after the first time step, This includes zeroing out the associated first counter, incrementing or not changing one count unit, performing downlink synchronization if the downlink is not synchronized when the terminal equipment initiates random access before the first time and continues random access after the first time, and / or reselecting random access resources based on the signal quality of the changed satellite, using a K offset configured by the changed satellite or a K offset with a value of 0, zeroing out the second counter associated with the RLM, and stopping the first timer associated with the RLM.

[0153] In some embodiments, the terminal device is further used to receive first configuration information, which is used to configure whether or not the terminal device performs a third operation.

[0154] In some embodiments, the first configuration information includes, if the terminal device triggers the first PHR before the first time, canceling the trigger of the first PHR, triggering the second PHR, triggering a TA report, resetting the power adjustment value to zero, some or all operations performed by the terminal device after the timing advance timer TAT times out, clearing the hybrid auto retransmission request HARQ buffer, obtaining uplink synchronization by random access, and if the terminal device initiates random access before the first time and continues random access after the first time, the first configuration information includes, It is used to configure whether to perform one or more of the following: resetting a counter to zero, incrementing or not changing a counting unit; performing downlink synchronization if the downlink is not synchronized when a terminal device starts random access before the first time point and continues random access after the first time point; and / or reselecting random access resources based on the signal quality of the changed satellite; using a K offset configured by the changed satellite or a K offset with a value of 0; resetting a second counter associated with the RLM to zero; and stopping the first timer associated with the RLM.

[0155] In some embodiments, the execution time of the third operation is later than or equal to the execution time of the first operation.

[0156] In some embodiments, the effective time of the modified satellite's ephemeris information is earlier than or equal to the first time.

[0157] Figure 14 is a schematic diagram of the network device 1400 according to an embodiment of the present invention. The network device 1400 may include a decision unit 1410 and a configuration unit 1420.

[0158] The decision unit 1410 is used to determine the first time, which is the satellite change time corresponding to the first cell of the terminal equipment.

[0159] The configuration unit 1420 is used to configure, based on a first time, one or more of the modified satellite ephemeris information and a first operation performed by the terminal equipment based on the first time, the first operation including one or more of the second operation performed by the terminal equipment after it has started using the modified satellite ephemeris information and a third operation performed by the terminal equipment in response to the satellite change in the first cell.

[0160] In some embodiments, the network equipment is further used to transmit first ephemeris information and first instruction information, the first instruction information is used to indicate whether the first ephemeris information can be associated with the modified satellite.

[0161] In some embodiments, the first instruction information may be carried in the first message, and if the terminal device does not receive the instruction information for the first time, the first message will not contain the first instruction information.

[0162] In some embodiments, network equipment is further used to transmit first ephemeris information, the effective time of the first ephemeris information is a second time zone, and whether or not the first ephemeris information is associated with the modified satellite is determined based on the second time zone.

[0163] In some embodiments, if the difference between the second time point and the first time point is less than or equal to the first time length threshold, the first ephemeris information is associated with the modified satellite; or, if the second time point is later than or equal to the first time point, the first ephemeris information is associated with the modified satellite.

[0164] In some embodiments, the network device is further used to transmit a second instruction, which is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

[0165] In some embodiments, the position of the ephemeris information of the first neighboring cell in the ephemeris information list is the first position, and whether the satellite corresponding to the first neighboring cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

[0166] In some embodiments, if the first position is the Nth in the ephemeris information list of one or more neighboring cells, the satellite corresponding to the first neighboring cell becomes the satellite corresponding to the first cell, where N is a positive integer.

[0167] In some embodiments, the network device is further used to transmit first configuration information, which is used to configure whether or not a terminal device performs a third operation.

[0168] In some embodiments, the first configuration information includes, if the terminal device triggers the first PHR before the first time, canceling the trigger of the first PHR, triggering the second PHR, triggering a TA report, resetting the power adjustment value to zero, some or all operations performed by the terminal device after the timing advance timer TAT times out, clearing the hybrid auto retransmission request HARQ buffer, obtaining uplink synchronization by random access, and if the terminal device initiates random access before the first time and continues random access after the first time, the first configuration information includes, It is used to configure whether to perform one or more of the following: resetting a counter to zero, incrementing or not changing a counting unit; performing downlink synchronization if the downlink is not synchronized when a terminal device starts random access before the first time point and continues random access after the first time point; and / or reselecting random access resources based on the signal quality of the changed satellite; using a K offset configured by the changed satellite or a K offset with a value of 0; resetting a second counter associated with the RLM to zero; and stopping the first timer associated with the RLM.

[0169] In some embodiments, the execution time of the third operation is later than or equal to the execution time of the first operation.

[0170] In some embodiments, the effective time of the modified satellite's ephemeris information is earlier than or equal to the first time.

[0171] In selectable embodiments, the execution unit 1310, decision unit 1410, and configuration unit 1420 may be processors 1510. The terminal device 1300 or network device 1400 may further include a memory 1520 and / or a transceiver 1530, specifically shown in Figure 15.

[0172] Figure 15 is a schematic diagram of a communication device in an embodiment of the present invention. The dashed lines in Figure 15 indicate that the unit or module is selectable. The device 1500 may be used to implement the method described in the above embodiment. The device 1500 may be a chip, terminal equipment, or network equipment.

[0173] The apparatus 1500 may include one or more processors 1510. The processors 1510 can support the apparatus 1500 in implementing the methods described in the above embodiment of the method. The processors 1510 may be general-purpose processors or dedicated processors. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0174] The device 1500 may further include one or more memories 1520. A program is stored in the memory 1520, which can be executed by the processor 1510 to cause the processor 1510 to perform the method described in the above embodiment of the method. The memory 1520 may be independent of the processor 1510 or may be integrated with the processor 1510.

[0175] The device 1500 may further include a transceiver 1530. The processor 1510 can communicate with other devices or chips via the transceiver 1530. For example, the processor 1510 can send and receive data with other devices or chips via the transceiver 1530.

[0176] Embodiments of the present application further provide a computer-readable storage medium used for storing a program. The computer-readable storage medium can be applied to a terminal or network device according to an embodiment of the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0177] Embodiments of the present application further provide a computer program product, which includes a program, which can be applied to a terminal or network device according to an embodiment of the present application, and which causes a computer to execute the methods performed by the terminal or network device in each embodiment of the present application.

[0178] Embodiments of the present application further provide a computer program. The computer program can be applied to a terminal or network device according to an embodiment of the present application, and the computer program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0179] It should be understood that, in this application, the terms “system” and “network” may be interchangeable. Furthermore, the terms used in this application are used solely to interpret the specific embodiments of this application and are not intended to limit it. Terms such as “first,” “second,” “third,” and “fourth” in the specification, claims, and drawings of this application are used to distinguish different subjects, not to describe a specific order. Also, the terms “include,” “have,” and any variations thereof are intended to cover non-exclusive inclusion.

[0180] In the embodiments of the present application, the “instruction” referred to may be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B may mean that A directly instructs B, for example, indicating that B can be obtained by A; or A indirectly instructs B, for example, indicating that A instructs C, indicating that B can be obtained by C; or an indication of a related relationship between A and B.

[0181] In the embodiments of this application, "B corresponding to A" indicates that B is associated with A and that B can be determined in accordance with A. However, determining B in accordance with A does not mean determining B in accordance with A alone, but rather that B may be determined in accordance with A and / or other information.

[0182] In the embodiments of this application, the term "correspondence" may indicate a direct or indirect correspondence between the two, a related relationship between the two, or a relationship such as instruction and instruction, or component and component.

[0183] In the embodiments of this application, “pre-defined” or “pre-configured” may be implemented by pre-storing in a device (including, for example, user devices and network devices) a form that can indicate the corresponding code, form, or related information, and this application does not limit the specific form of such implementation. For example, pre-defined may refer to something defined in a protocol.

[0184] In the embodiments of the present application, the term "protocol" may refer to a standard protocol in the field of communications, and may include, for example, the LTE protocol, the NR protocol, and related protocols applicable to future communications systems, but is not limited thereto.

[0185] In the embodiments of this application, the term "and / or" simply describes the relationship between related objects and indicates that three types of relationships exist. For example, A and / or B include the three situations where only A exists, where A and B exist simultaneously, and where only B exists. In this specification, the symbol " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0186] In embodiments of the present application, the term "includes" may mean either directly or indirectly. Optionally, any use of "includes" in embodiments of the present application may be replaced with "indicates" or "used to determine." For example, "A includes B" may be replaced with "A indicates B" or "A is used to determine B."

[0187] In the various embodiments of the present application, the magnitude of the process numbers does not indicate the order of execution, and the execution order of each process should be determined based on its function and inherent logic, and does not constitute any limitation on the implementation processes of the embodiments of the present application.

[0188] In some embodiments relating to this application, it should be understood that the disclosed systems, apparatus and methods can be implemented in other forms. For example, the apparatus embodiments described above are merely illustrative, and for instance, the division of the units is merely one type of logic function division. In actual implementation, other division methods may be employed, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or omitted. Furthermore, the mutual coupling, direct coupling or communication connection described or considered may also be an indirect coupling or communication connection via some interface, apparatus or unit, and may be in the form of electrical, mechanical or other.

[0189] The units described as separation members may or may not be physically separated, and the members referred to as units may or may not be physical units; that is, they may be located in one place or distributed among multiple network units. Some or all of the units can be selected as needed to achieve the objectives of the means of this embodiment.

[0190] Furthermore, each functional unit in each embodiment of the present application may be integrated into a single processing unit, each unit may exist physically separately, and two or more units may be integrated into a single unit.

[0191] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. If implemented by software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. Loading and executing the computer program instructions into a computer generates all or part of the procedures or functions described in the embodiments of this application. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic cable, digital subscriber line (DSL)) or wirelessly (e.g., infrared, radio, microwave, etc.). The computer-readable storage medium may be any available medium that a computer can read, or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid state disks (SSDs)).

[0192] Although specific embodiments of the present application have been described above, the scope of protection of this application is not limited thereto. Any modifications or substitutions that a person skilled in the art could easily conceive without departing from the technical scope disclosed herein fall within the scope of protection of this application. Therefore, the scope of protection of this application should be the same as the scope of protection of the claims. [Explanation of Symbols]

[0193] 100 Wireless Communication Systems 110 Network Equipment 120 terminal devices 1300 terminal devices 1310 Execution Unit 1400 network devices 1410 Decision Unit 1420 component units 1500 equipment 1510 Processor 1520 memory 1530 Transmitter / Receiver

Claims

1. A method for communication, The process includes the step of a terminal device performing a first operation based on a first time, The first time is the satellite change time corresponding to the first cell of the terminal device, and the first operation is, A second operation performed after the terminal device begins using the modified satellite's ephemeris information, A method characterized by including one or more of the following: a terminal device performing a third operation in response to a change in the satellite of the first cell.

2. The method according to claim 1, characterized in that the terminal device performs the second operation after it has started using the time of the satellite's ephemeris information after the first time.

3. The method according to 1 or 2, characterized in that the terminal device stops using the satellite's ephemeris information prior to the change at the first time and performs the second operation.

4. The terminal device receives the first ephemeris information, The method according to any one of claims 1 to 3, further comprising the step of determining whether the terminal device can associate the first ephemeris information with the modified satellite.

5. The process further includes the step of the terminal device receiving first instruction information, The method according to 4, characterized in that the first instruction information is used to indicate whether or not the first ephemeris information can be associated with the modified satellite.

6. The method according to 5, characterized in that the first instruction information may be carried in a first message, and if the terminal device does not receive the instruction information for the first time, the first message does not include the first instruction information.

7. The method according to claim 4, characterized in that the effective time of the first ephemeris information is the second time, and whether or not the first ephemeris information is associated with the modified satellite is determined based on the second time.

8. If the difference between the second time and the first time is less than or equal to the first time threshold, the first ephemeris information is associated with the modified satellite, or The method according to 7, characterized in that if the second time is later than or equal to the first time, the first ephemeris information is associated with the modified satellite.

9. The process further includes the step of the terminal device receiving second instruction information, The method according to any one of claims 1 to 8, characterized in that the second instruction information is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

10. The method according to any one of claims 1 to 8, characterized in that the position of the ephemeris information of the first adjacent cell in the ephemeris information list is the first position, and whether or not the satellite corresponding to the first adjacent cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

11. The method according to 10, characterized in that when the first position is the Nth in the ephemeris information list of one or more adjacent cells, the satellite corresponding to the first adjacent cell becomes the satellite corresponding to the first cell, and N is a positive integer.

12. The method according to any one of claims 1 to 11, characterized in that the fourth time point corresponding to the ephemeris information of the modified satellite is determined based on the subframe boundary before the satellite change or the subframe boundary after the satellite change.

13. The method according to 12, characterized in that the fourth time includes the expiration time of the modified satellite's ephemeris information and / or the effective time of the modified satellite's ephemeris information.

14. The method according to any one of claims 1 to 13, characterized in that the third operation is associated with one or more of the following: power headroom report PHR, timing advance TA, power adjustment value, random access, K offset, and radio link monitoring RLM.

15. The third operation is, If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization is performed, and / or the random access resource is re-selected based on the signal quality of the modified satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The method according to 14, characterized by comprising one or more of the following: stopping a first timer associated with the RLM.

16. The process further includes the step of the terminal device receiving first configuration information, The method according to any one of claims 1 to 15, characterized in that the first configuration information is used to determine whether or not the terminal device performs the third operation.

17. The first configuration information is that the terminal device If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization will be performed, and / or the random access resource will be re-selected based on the signal quality of the changed satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The method according to 16, characterized in that it is used to configure whether or not to perform one or more of the following: stopping a first timer associated with the RLM.

18. The method according to any one of claims 1 to 17, characterized in that the execution time of the third operation is later than or equal to the first time.

19. The method according to any one of claims 1 to 18, characterized in that the effective time of the modified satellite's ephemeris information is earlier than or equal to the first time.

20. A method for communication, A step in which a network device determines a first time, wherein the first time is the satellite change time corresponding to the first cell of the terminal device, The steps include the network device configuring one or more of the modified satellite ephemeris information and the terminal device performing a first operation based on the first time, The first operation is, A second operation performed after the terminal device begins using the modified satellite's ephemeris information, A method characterized by including one or more of the following: a terminal device performing a third operation in response to a change in the satellite of the first cell.

21. The steps include: the network device transmitting the first ephemeris information; The step further includes the network device transmitting first instruction information, The method according to 20, characterized in that the first instruction information is used to indicate whether or not the first ephemeris information can be associated with the modified satellite.

22. The method according to 21, characterized in that the first instruction information may be carried in a first message, and if the terminal device does not receive the instruction information for the first time, the first message does not include the first instruction information.

23. The step further includes the network device transmitting first ephemeris information, The method according to 20, characterized in that the effective time of the first ephemeris information is the second time, and whether or not the first ephemeris information is associated with the modified satellite is determined based on the second time.

24. If the difference between the second time and the first time is less than or equal to the first time length threshold, the first ephemeris information is associated with the modified satellite, or The method according to 23, characterized in that if the second time is later than or equal to the first time, the first ephemeris information is associated with the modified satellite.

25. The step further includes the network device transmitting second instruction information, The method according to any one of claims 20 to 24, characterized in that the second instruction information is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

26. The method according to any one of claims 20 to 24, characterized in that the position of the ephemeris information of the first adjacent cell in the ephemeris information list is a first position, and whether or not the satellite corresponding to the first adjacent cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

27. The method according to 26, characterized in that when the first position is the Nth in the ephemeris information list of one or more adjacent cells, the satellite corresponding to the first adjacent cell becomes the satellite corresponding to the first cell, and N is a positive integer.

28. The step further includes the network device transmitting first configuration information, The method according to any one of claims 20 to 27, characterized in that the first configuration information is used to determine whether or not the terminal device performs the third operation.

29. The first configuration information is that the terminal device If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization will be performed, and / or the random access resource will be re-selected based on the signal quality of the changed satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The method according to 28, characterized in that it is used to configure whether or not to perform one or more of the following: stopping a first timer associated with the RLM.

30. The method according to any one of claims 20 to 29, characterized in that the execution time of the third operation is later than or equal to the first time.

31. The method according to any one of claims 20 to 30, characterized in that the effective time of the modified satellite ephemeris information is earlier than or equal to the first time.

32. Terminal device, Includes an execution unit for performing a first operation based on a first time point, The first time is the satellite change time corresponding to the first cell of the terminal device, and the first operation is, A second operation performed after the terminal device begins using the modified satellite's ephemeris information, A terminal device characterized by including one or more of the third operations that the terminal device performs in response to a change in the satellite of the first cell.

33. The terminal device according to claim 32, characterized in that the terminal device performs the second operation after it has started using the modified satellite ephemeris information at the first time.

34. The terminal device according to claim 32 or 33, characterized in that the terminal device stops using the satellite's ephemeris information prior to the change at the first time and performs the second operation.

35. Furthermore, receiving the first ephemeris information, The terminal device according to any one of claims 32 to 34, characterized in that the first ephemeris information is used to determine whether or not it can be associated with the modified satellite.

36. Furthermore, it is used to receive the first instruction information, The terminal device according to claim 35, characterized in that the first instruction information is used to indicate whether or not the first ephemeris information can be associated with the modified satellite.

37. The terminal device according to 36, wherein the first instruction information may be carried in a first message, and if the terminal device does not receive the instruction information for the first time, the first message does not include the first instruction information.

38. The terminal device according to claim 35, characterized in that the effective time of the first ephemeris information is the second time, and whether or not the first ephemeris information is associated with the modified satellite is determined based on the second time.

39. If the difference between the second time and the first time is less than or equal to the first time length threshold, the first ephemeris information is associated with the modified satellite, or The terminal device according to claim 38, characterized in that when the second time is later than or equal to the first time, the first ephemeris information is associated with the modified satellite.

40. Furthermore, it is used to receive the second instruction information. The terminal device according to any one of claims 32 to 39, characterized in that the second instruction information is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

41. The terminal device according to any one of claims 32 to 39, characterized in that the position of the ephemeris information of the first adjacent cell in the ephemeris information list is the first position, and whether or not the satellite corresponding to the first adjacent cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

42. The terminal device according to claim 41, characterized in that when the first position is the Nth in the ephemeris information list of one or more adjacent cells, the satellite corresponding to the first adjacent cell becomes the satellite corresponding to the first cell, and N is a positive integer.

43. The terminal equipment according to any one of claims 32 to 42, characterized in that the fourth time zone corresponding to the ephemeris information of the modified satellite is determined based on the subframe boundary before or after the satellite change.

44. The terminal device according to claim 43, characterized in that the fourth time includes the expiration time of the modified satellite's ephemeris information and / or the effective time of the modified satellite's ephemeris information.

45. The terminal equipment according to any one of claims 32 to 44, characterized in that the third operation is associated with one or more of the power headroom report PHR, timing advance TA, power adjustment value, random access, K offset, and radio link monitoring RLM.

46. The third operation is, If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization is performed, and / or the random access resource is re-selected based on the signal quality of the modified satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The terminal device according to claim 45, characterized in that it includes one or more of the following: stopping a first timer associated with the RLM.

47. Furthermore, it is used to receive the first configuration information, The terminal device according to any one of claims 32 to 46, characterized in that the first configuration information is used to determine whether or not the terminal device performs the third operation.

48. The first configuration information is that the terminal device If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization will be performed, and / or the random access resource will be re-selected based on the signal quality of the changed satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The terminal device according to claim 47, characterized in that it is used to configure whether or not to perform one or more of the following: stopping a first timer associated with the RLM.

49. The terminal device according to any one of claims 32 to 48, characterized in that the execution time of the third operation is later than or equal to the first time.

50. The terminal device according to any one of claims 32 to 49, characterized in that the effective time of the modified satellite ephemeris information is earlier than or equal to the first time.

51. Network equipment, A determination unit for determining a first time, wherein the first time is the change time of the satellite corresponding to the first cell of the terminal device, A configuration unit for configuring one or more of the modified satellite ephemeris information and a first operation performed by a terminal device based on the first time, The first operation is, A second operation performed after the terminal device begins using the modified satellite's ephemeris information, A network device characterized by including one or more of the following: a terminal device performing a third operation in response to a change in the satellite of the first cell.

52. Furthermore, transmitting the first ephemeris information, Used to transmit first instruction information, The network device according to claim 51, characterized in that the first instruction information is used to indicate whether or not the first ephemeris information can be associated with the modified satellite.

53. The network device according to claim 52, wherein the first instruction information may be carried in a first message, and if the terminal device does not receive the instruction information for the first time, the first message does not include the first instruction information.

54. Furthermore, it is used to transmit the first ephemeris information, The network device according to claim 51, characterized in that the effective time of the first ephemeris information is the second time, and whether or not the first ephemeris information is associated with the modified satellite is determined based on the second time.

55. If the difference between the second time and the first time is less than or equal to the first time length threshold, the first ephemeris information is associated with the modified satellite, or The network device according to claim 54, characterized in that when the second time is later than or equal to the first time, the first ephemeris information is associated with the modified satellite.

56. Furthermore, it is used to transmit the second instruction information. The network device according to any one of claims 51 to 55, characterized in that the second instruction information is used to instruct the satellite corresponding to the first adjacent cell of the terminal device to become the satellite corresponding to the first cell.

57. The network device according to any one of claims 51 to 56, characterized in that the position of the ephemeris information of the first adjacent cell in the ephemeris information list is the first position, and whether or not the satellite corresponding to the first adjacent cell of the terminal device is the satellite corresponding to the first cell is determined by the first position.

58. The network device according to claim 57, characterized in that when the first position is the Nth in the ephemeris information list of one or more adjacent cells, the satellite corresponding to the first adjacent cell becomes the satellite corresponding to the first cell, and N is a positive integer.

59. Furthermore, it is used to transmit the first configuration information, The network device according to any one of claims 51 to 58, characterized in that the first configuration information is used to determine whether or not the terminal device performs the third operation.

60. The first configuration information is that the terminal device If the terminal device triggers the first PHR before the first time, the trigger of the first PHR is canceled. Triggering the second PHR, Triggering TA reporting, Reset the power adjustment value to zero, Some or all operations performed by the terminal device after the timing advance timer TAT times out, Clear the HARQ buffer for hybrid automatic retransmission requests, Obtaining uplink synchronization through random access, If the terminal device initiates random access before the first time point and continues the random access after the first time point, the first counter associated with the random access is reset to zero, one count unit is incremented, or no change is made. If the terminal device initiates random access before the first time point and continues the random access after the first time point, and the downlink is not synchronized, then downlink synchronization will be performed, and / or the random access resource will be re-selected based on the signal quality of the changed satellite. Using the K offset configured by the modified satellite or a K offset with a value of 0, To reset the second counter related to RLM to zero, The network device according to claim 59, characterized in that it is used to configure whether or not to perform one or more of the following: stopping a first timer associated with the RLM.

61. The network device according to any one of claims 51 to 60, characterized in that the execution time of the third operation is later than or equal to the first time.

62. The network device according to any one of claims 51 to 61, characterized in that the effective time of the modified satellite ephemeris information is earlier than or equal to the first time.

63. A terminal device comprising memory and a processor, wherein the memory is used to store a program, and the processor calls the program in the memory to cause the terminal device to execute the method according to any one of claims 1 to 19.

64. A network device comprising memory and a processor, wherein the memory is used to store a program, and the processor calls the program in the memory to cause the network device to execute the method according to any one of claims 20 to 31.

65. A device comprising a processor that calls a program from memory and causes the device to execute the method described in any one of claims 1 to 31.

66. A chip comprising a processor that calls a program from memory and causes a device on which the chip is installed to execute the method described in any one of claims 1 to 31.

67. A computer-readable storage medium characterized in that it stores a program that causes a computer to execute the method described in any one of claims 1 to 31.

68. A computer program product characterized by including a program that causes a computer to execute the method described in any one of claims 1 to 31.

69. A computer program characterized by causing a computer to execute the method described in any one of claims 1 to 31.

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