Communication method and related apparatus

Abstract

The present application relates to the technical field of communications, and discloses a communication method and a related apparatus. In the method, a network device determines first information, the first information being used for configuring at least one ephemeris information parameter set corresponding to a cell accessed by a terminal device; the network device sends the first information, and correspondingly, the terminal device receives the first information; and on the basis of the first information, the terminal device determines a first ephemeris information parameter set used for time-frequency synchronization. Therefore, by using the embodiments of the present application, the terminal device can receive the at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device, thereby facilitating the reduction of the cell handover frequency.

Description

Communication method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 20, 2023, with application number 202310896248.X and application name “Communication Methods and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and related devices. Background Art

[0003] In low Earth orbit (LEO) satellite communications, the cell coverage area is much smaller than in high-orbit satellite communications. Coupled with the rapid movement of LEO satellites, terminal devices face frequent cell handoffs, severely impacting service continuity and causing significant signaling overhead. Therefore, in LEO satellite communications, reducing the frequency of cell handoffs for terminal devices and ensuring service continuity is a pressing issue.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a communication method and related devices, which are conducive to reducing the frequency of cell switching of terminal equipment and ensuring service continuity.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which is described from the perspective of a terminal device or a device such as a chip or processor in the terminal device, and includes:

[0007] receiving first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device;

[0008] A first ephemeris information parameter set for time-frequency synchronization is determined according to the first information.

[0009] As can be seen, using the embodiments of the present application, a terminal device can receive at least one ephemeris information parameter set corresponding to the cell it is connected to, thereby facilitating a reduction in the frequency of cell handovers. Furthermore, the terminal device can determine the ephemeris information parameter set used for time-frequency synchronization based on the at least one ephemeris information parameter set, thereby facilitating the terminal device to utilize the ephemeris information parameter set for time-frequency synchronization.

[0010] In an optional embodiment, a first ephemeris information parameter set for time and frequency synchronization is determined based on the first information, including: determining at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device based on the first information, the first information being used to configure the ephemeris information parameter set of a reference satellite among multiple satellites corresponding to the cell accessed by the terminal device, and the orbital distances of other satellites other than the reference satellite relative to the reference satellite; and determining the first ephemeris information parameter set for time and frequency synchronization from at least one ephemeris information parameter set.

[0011] In an optional embodiment, a first ephemeris information parameter set for time-frequency synchronization is determined based on the first information, including: based on the first information, selecting the ephemeris information parameter set associated with the first synchronization signal block SSB as the first ephemeris information parameter set for time-frequency synchronization; wherein the first information is also used to configure different ephemeris information parameter sets associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current position information of the terminal device.

[0012] In an optional embodiment, based on the first information, a first ephemeris information parameter set for time and frequency synchronization is determined, including: based on the first information, selecting the ephemeris information parameter set associated with the SSB group to which the first synchronization signal block SSB belongs as the first ephemeris information parameter set for time and frequency synchronization; wherein the first information is also used to configure different ephemeris information parameter sets associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current position information of the terminal device.

[0013] In an optional embodiment, based on the first information, a first ephemeris information parameter set for time and frequency synchronization is determined, including: selecting, based on the first information, an ephemeris information parameter set associated with the currently activated bandwidth part BWP in the cell accessed by the terminal device as the first ephemeris information parameter set for time and frequency synchronization; wherein the first information is also used to configure different ephemeris information parameter sets associated with different BWPs.

[0014] In an optional embodiment, the method further includes: calculating the Doppler frequency shift on the service link based on the first ephemeris information parameter set and the location information of the terminal device; performing uplink frequency synchronization based on the Doppler frequency shift; and / or, calculating the round-trip propagation delay on the service link based on the first ephemeris information parameter set and the location information of the terminal device; and performing uplink timing synchronization based on the round-trip propagation delay on the service link.

[0015] In an optional embodiment, uplink timing synchronization is performed based on the round-trip propagation delay on the service link, including: receiving second information; the second information is used to configure at least one public timing advance TA configuration parameter set corresponding to the cell accessed by the terminal device; determining a first public TA configuration parameter set based on the second information; determining a public TA value based on the first public TA configuration parameter set; determining a timing advance TA value for uplink transmission based on the public TA value and the round-trip propagation delay on the service link.

[0016] In an optional embodiment, a first public TA configuration parameter set is determined based on the second information, including: based on the second information, selecting a public TA configuration parameter set associated with the first synchronization signal block SSB as the first public TA configuration parameter set; wherein the second information is also used to configure different public TA configuration parameters associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0017] In an optional embodiment, the first public TA configuration parameter set is determined based on the second information, including: based on the second information, selecting the public TA configuration parameter set associated with the SSB group to which the first SSB belongs as the first public TA configuration parameter set; wherein the second information is also used to configure different public TA configuration parameters associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0018] In an optional embodiment, the first public TA configuration parameter set is determined based on the second information, including: based on the second information, selecting the public TA configuration parameter set associated with the currently activated bandwidth part BWP in the cell accessed by the terminal device as the first public TA configuration parameter set; wherein the second information is also used to configure different public TA configuration parameter sets associated with different BWPs.

[0019] In a second aspect, an embodiment of the present application provides a communication method, which is described from the perspective of a terminal device or a device such as a chip or processor in the terminal device, and includes:

[0020] Receive first information, where the first information is used to configure at least one media access layer control element MAC CE validity delay K-mac corresponding to a cell accessed by the terminal device; the MAC CE validity delay K-mac is a round-trip propagation delay between a synchronization reference point and a network device; the synchronization reference point is a location on a transmission link between the terminal device and the network device;

[0021] According to the first information, a MAC CE validation delay K-mac is determined when the terminal device transmits data with the network device via different satellites.

[0022] It can be seen that by adopting the embodiment of the present application, the terminal device can determine the corresponding media access control control element (MAC CE) effectiveness delay K-mac when the terminal device transmits data with the network device through different satellites through the received first information, which is conducive to determining the uplink data transmission timing based on the MAC CE effectiveness delay K-mac.

[0023] In an optional embodiment, based on the first information, the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through different satellites is determined, including: based on the first information, selecting the MAC CE effectiveness delay K-mac associated with the first synchronization signal block SSB as the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through the satellite associated with the first SSB; wherein the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0024] In an optional embodiment, based on the first information, the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through different satellites is determined, including: based on the first information, selecting the MAC CE effectiveness delay K-mac associated with the SSB group to which the first synchronization signal block SSB belongs as the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through the satellite associated with the SSB group to which the first SSB belongs; wherein the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0025] In an optional embodiment, based on the first information, the MAC CE effectiveness delay K-mac when the terminal device performs data transmission with the network device through different satellites is determined, including: based on the first information, selecting the MAC CE effectiveness delay K-mac associated with the first bandwidth part BWP as the MAC CE effectiveness delay K-mac when the terminal device performs data transmission with the network device through the first satellite; wherein the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different BWPs; the first BWP is the BWP currently activated by the terminal device, and the first satellite is a satellite that provides services to the terminal device through the first BWP.

[0026] In an optional embodiment, the method further includes: sending a timing advance TA value for uplink transmission, and a synchronization broadcast signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSBs, SSB groups or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; and receiving a delay value K-offset for determining the uplink data scheduling delay.

[0027] In an optional embodiment, the method further includes: receiving third information, the third information being used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, and the delay value K-offset being used to determine the uplink data scheduling delay; according to the third information, selecting the delay value K-offset associated with the second BWP as the delay value K-offset for the terminal device to determine the uplink data scheduling delay, the second BWP being the BWP where the physical downlink shared channel PDSCH or the physical downlink control channel PDCCH is located.

[0028] In an optional embodiment, the method further includes: determining the starting position of the ready access response message window RAR Window based on the round-trip MAC CE validity delay K-mac when the terminal device performs data transmission and the timing advance TA value of the uplink transmission.

[0029] In a third aspect, an embodiment of the present application provides a communication method, which is described from the perspective of a network device or a device such as a chip or processor in the network device, and includes:

[0030] Determining first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device;

[0031] Send the first message.

[0032] As can be seen, using the embodiments of the present application, a network device can send first information to a terminal device for configuring at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device, thereby helping the terminal device reduce the frequency of cell handovers. Furthermore, the terminal device can determine the ephemeris information parameter set used for time-frequency synchronization based on the first information, thereby facilitating the terminal device to use the ephemeris information parameter set for time-frequency synchronization.

[0033] In an optional embodiment, the first information is also used to configure the ephemeris information parameter set of the reference satellite among the multiple satellites corresponding to the cell accessed by the terminal device, and the orbital distances of other satellites except the reference satellite relative to the reference satellite.

[0034] In this embodiment, the network device may indicate to the terminal device the ephemeris information parameter set of the reference satellite among the multiple satellites corresponding to the cell accessed by the terminal device, as well as the orbital distances of other satellites other than the reference satellite relative to the reference satellite. In this way, compared with the method of sending at least one ephemeris information parameter set corresponding to the cell for configuring the terminal device to access the terminal device, the signaling overhead of the network device can be reduced.

[0035] In an optional embodiment, the first information is also used to configure different ephemeris information parameter sets associated with different synchronization signal blocks SSB.

[0036] In an optional embodiment, the first information is also used to configure different ephemeris information parameter sets associated with different synchronization signal block SSB groups.

[0037] In an optional implementation, the first information is further used to configure different ephemeris information parameter sets associated with different bandwidth parts BWP.

[0038] In an optional implementation, the method further includes: determining second information, where the second information is used to configure at least one common timing advance TA configuration parameter set corresponding to the cell accessed by the terminal device; and sending the second information.

[0039] In an optional embodiment, the second information is also used to configure different common TA configuration parameter sets associated with different synchronization signal blocks SSB.

[0040] In an optional embodiment, the second information is also used to configure different common TA configuration parameter sets associated with different synchronization signal block SSB groups.

[0041] In an optional implementation manner, the second information is further used to configure different common TA configuration parameter sets associated with different bandwidth parts BWP.

[0042] In a fourth aspect, an embodiment of the present application provides a communication method, which is described from the perspective of a network device or a device such as a chip or processor in the network device, and includes:

[0043] Determine first information, where the first information is used to configure at least one media access layer control element MAC CE validity delay K-mac corresponding to the cell accessed by the terminal device; the MAC CE validity delay K-mac is the round-trip propagation delay between a synchronization reference point and a network device; the synchronization reference point is one of the locations on the transmission link between the terminal device and the network device;

[0044] Send the first message.

[0045] It can be seen that by using the embodiment of the present application, the network device can send a first information to the terminal device, and the first information is used to configure at least one MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device, thereby facilitating the terminal device to determine the MAC CE effectiveness delay K-mac for data transmission with the network device through different satellites based on the first information.

[0046] In an optional embodiment, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal blocks SSB.

[0047] In an optional embodiment, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal block SSB groups.

[0048] In an optional implementation manner, the first information is further used to configure different MAC CE validation delays K-mac associated with different bandwidth parts BWP.

[0049] In an optional embodiment, the method further includes: receiving a timing advance TA value of an uplink transmission, and a synchronization signal block SSB, an SSB group, a bandwidth part BWP or identification information associated with the TA value; different SSBs, SSB groups or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; and sending a delay value K-offset for determining an uplink data scheduling delay.

[0050] In an optional embodiment, the method further includes: determining third information, the third information being used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, the delay value K-offset being used to determine the uplink data scheduling delay; and sending the third information.

[0051] In a fifth aspect, an embodiment of the present application provides a communication device, the device comprising:

[0052] A communication unit, configured to receive first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by a terminal device;

[0053] The determining unit is further configured to determine a first ephemeris information parameter set for time-frequency synchronization based on the first information.

[0054] Optionally, the communication device may perform optional implementations and beneficial effects as described in the relevant content of the first aspect above, which will not be described in detail here.

[0055] In a sixth aspect, an embodiment of the present application provides a communication device, the device comprising:

[0056] A communication unit is configured to receive first information, where the first information is used to configure a MAC CE validity delay K-mac of at least one media access layer control element corresponding to a cell accessed by a terminal device; the MAC CE validity delay K-mac is a round-trip propagation delay between a synchronization reference point and a network device; a synchronization reference point is a location on a transmission link between a terminal device and a network device;

[0057] The determining unit is configured to determine, based on the first information, a MAC CE validation delay K-mac when the terminal device transmits data to the network device via different satellites.

[0058] Optionally, the communication device may perform optional implementations and beneficial effects as described in the relevant content of the second aspect above, which will not be described in detail here.

[0059] In a seventh aspect, an embodiment of the present application provides a communication device, the device comprising:

[0060] a determining unit, configured to determine first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device;

[0061] The communication unit is configured to send first information.

[0062] Optionally, the communication device may perform optional implementations and beneficial effects as described in the relevant content of the third aspect above, which will not be described in detail here.

[0063] In an eighth aspect, an embodiment of the present application provides a communication device, the device comprising:

[0064] a determining unit, configured to determine first information, where the first information is used to configure at least one media access layer control element MAC CE validity delay K-mac corresponding to a cell accessed by the terminal device; the MAC CE validity delay K-mac is a round-trip propagation delay between a synchronization reference point and a network device; the synchronization reference point is one of the locations on a transmission link between the terminal device and the network device;

[0065] The communication unit is configured to send first information.

[0066] Optionally, the communication device may perform optional implementations and beneficial effects as described in the relevant content of the fourth aspect above, which will not be described in detail here.

[0067] In a ninth aspect, an embodiment of the present application provides a communication device, comprising: a processor and a memory, wherein the processor and the memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, wherein the processor is used to call the program instructions to implement the method involved in any optional implementation of the first aspect above, or to implement the method involved in any optional implementation of the second aspect above. Optionally, the communication device can be a terminal device or a chip or chip module in a terminal device.

[0068] In a tenth aspect, an embodiment of the present application provides a communication device, comprising: a processor and a memory, wherein the processor and the memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions, wherein the processor is used to call the program instructions to implement the method involved in any optional implementation of the third aspect above, or to implement the method involved in any optional implementation of the fourth aspect above. Optionally, the communication device can be a network device or a chip or chip module in a network device.

[0069] In an eleventh aspect, an embodiment of the present application provides a chip, comprising a processor, wherein the processor executes the steps of the method according to the first or second aspect. Optionally, the chip may further comprise a memory and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the method according to any optional implementation of any of the first to fourth aspects.

[0070] In a twelfth aspect, an embodiment of the present application provides a chip module comprising a transceiver component and a chip, wherein the chip comprises a processor, wherein the processor executes the steps of the method according to the first or second aspect. Optionally, the chip may further comprise a memory and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the method according to any optional implementation of any of the first to fourth aspects.

[0071] In the thirteenth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a computer, the method involved in any optional implementation method of any one of the above-mentioned aspects from the first to the fourth aspects is implemented.

[0072] In the fourteenth aspect, an embodiment of the present application provides a computer program product, including a computer program or program instructions, which, when executed, implements the method involved in any optional implementation of any of the above-mentioned aspects from the first to the fourth aspects.

[0073] In the fifteenth aspect, an embodiment of the present application provides a communication system, which includes at least one terminal device, at least one network device and at least one satellite, wherein the at least one terminal device is used to perform the operations of the first or second aspect mentioned above, and the at least one network device is used to perform the operations of the third or fourth aspect mentioned above, and the at least one terminal device transmits data with the at least one network device through at least one satellite. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] FIG1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0075] FIG2a is a schematic diagram of a synchronization reference point located on a satellite provided by an embodiment of the present application;

[0076] FIG2 b is a schematic diagram of a synchronization reference point located on a network device according to an embodiment of the present application;

[0077] FIG2c is a schematic diagram of a network device determining a synchronization reference point according to an embodiment of the present application;

[0078] FIG3 is a schematic diagram of an uplink data scheduling timing provided by an embodiment of the present application;

[0079] FIG4 is a flow chart of a communication method provided in an embodiment of the present application;

[0080] FIG5 is a schematic diagram of a flow chart of an uplink timing synchronization method provided in an embodiment of the present application;

[0081] FIG6 is a flow chart of another communication method provided in an embodiment of the present application;

[0082] FIG7 is a flow chart of another communication method provided in an embodiment of the present application;

[0083] FIG8 is a flow chart of another communication method provided in an embodiment of the present application;

[0084] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0085] FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0086] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0087] It should be noted that, in this application, the terms "first," "second," "third," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. Furthermore, the term "comprises" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units but may also include steps or units that are not listed, or may include other steps or units that are inherent to the process, method, product, or device.

[0088] In this application, "equal to" can be used in conjunction with "less than" or "greater than", but not with both "less than" and "greater than". When "equal to" is used in conjunction with "less than", the technical solution used for "less than" applies. When "equal to" is used in conjunction with "greater than", the technical solution used for "greater than" applies.

[0089] In this application, "and / or" is simply a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document indicates that the related objects are in an "or" relationship.

[0090] "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where each of a, b, and c can be an element itself or a set containing one or more elements.

[0091] In this application, "at least one" means one or more. "Multiple" means two or more. The first, second, etc. descriptions that appear in the embodiments of this application are only for illustration and to distinguish the described objects. There is no order, nor does it represent a special limit on the number in the embodiments of this application, and it does not constitute any limitation on the embodiments of this application. For example, the first identifier and the second identifier are only for distinguishing the identifiers corresponding to different vehicles, and do not mean that the two identifiers are the same or different.

[0092] Throughout this application, the terms "exemplary," "in some embodiments," and "in other embodiments" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0093] In this application, the terms "of," "corresponding," "relevant," "corresponding," and "associated" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they convey are consistent. In the embodiments of this application, the terms "communication" and "transmission" may sometimes be used interchangeably. It should be noted that, when the distinction between them is not emphasized, the meanings they convey are consistent. For example, "transmission" may include "sending" and / or "receiving," and may be either a noun or a verb.

[0094] Please refer to Figure 1, which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. The device form shown in Figure 1 is for example and does not constitute a limitation on the embodiments of the present application. As shown in Figure 1, the communication system may include at least one terminal device (drawn as an example including terminal device 101 in the figure), at least one network device (drawn as an example including network device 102 in the figure), and at least one satellite (drawn as an example including satellite 103 in the figure).

[0095] In this application, a terminal device is a device with wireless communication capabilities, and may also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal equipment, vehicle-mounted terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile device, UE terminal equipment, wireless communication equipment, intelligent terminal equipment, UE agent, or UE device. A terminal device can be fixed or mobile.

[0096] Optionally, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0097] It should be noted that the terminal device can support at least one wireless communication technology, such as Long-Term Evolution (LTE), new radio (NR), 6G or next-generation wireless communication technology. For example, the terminal device can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an all-in-one computer, an in-vehicle terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a next-generation communication system such as an NR network, a terminal device in a future mobile communication network, or a terminal device in a future evolved public land mobile network (PLMN), etc.

[0098] Furthermore, the terminal device may also include a device with transceiver functions, such as a chip system, wherein the chip system may include a chip and may also include other discrete devices.

[0099] In this application, a network device may be a device used to communicate with a terminal device, which is responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission and reception, etc. on the air interface side. Among them, the network device may be a base station (BS) in a communication system or a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, the base transceiver station (BTS) in the Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) communication system, the node B (NB) in the Wideband Code Division Multiple Access (WCDMA) communication system, the evolutionary node B (eNB or eNodeB) in the LTE communication system, the next generation evolved node B (ng-eNB) in the NR communication system, the next generation node B (gNB) in the NR communication system, the master node (MN) in the dual-link architecture, the second node or secondary node (SN) in the dual-link architecture, etc., without specific limitation.

[0100] Optionally, the network device can also be other devices in the core network (CN), such as access and mobility management function (AMF), user plan function (UPF), etc.; it can also be an access point (AP) in a wireless local area network (WLAN), a relay station, a communication device in a future evolved PLMN network, a communication device in a non-terrestrial network (NTN), etc.

[0101] Optionally, the network device may include a device that provides wireless communication functionality for the terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

[0102] It should be noted that in some network deployments, the network device can be a standalone node that implements all the functions of the aforementioned base station. It can include a centralized unit (CU) and a distributed unit (DU), such as the gNB-CU and gNB-DU. It can also include an active antenna unit (AAU). The CU can implement some of the network device's functions, while the DU can also implement some of the network device's functions. For example, the CU is responsible for processing non-real-time protocols and services, implementing the functions of the radio resource control (RRC), service data adaptation protocol (SDAP), and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the radio link control (RLC), medium access control (MAC), and physical (PHY) layers. In addition, the AAU can implement some physical layer processing functions, RF processing, and active antenna-related functions. Because RRC layer information ultimately becomes PHY layer information, or is converted from PHY layer information, in this network deployment, higher-layer signaling (such as RRC layer signaling) can be considered to be sent by the DU, or sent jointly by the DU and AAU. It is understood that a network device may include at least one of a CU, a DU, and an AAU. Furthermore, a CU may be classified as a network device in an access network (RAN) or a network device in a core network, without specific limitation.

[0103] Optionally, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network device may also be a base station set up in a location such as land or water. The network device includes a network device 102.

[0104] Optionally, the satellite may be a low earth orbit (LEO) satellite (or referred to as a low-orbit satellite). The satellite includes satellite 103 .

[0105] The following is a brief description of some concepts involved in the embodiments of this application.

[0106] 1. Common Timing Advance (TA) Value

[0107] The public TA value refers to the round trip time (RTT) between the synchronization reference point and the satellite. The introduction of the synchronization reference point can be found in the following description and will not be elaborated here.

[0108] The public TA value is generally indicated to the terminal device by the network device through a system message. Since the RTT between the satellite and the synchronization reference point changes as the satellite moves, the network device can indicate a public TA value-related parameter set when indicating the public TA value to the terminal device. The parameter set includes the public TA initial value, the rate of change of the public TA value, and the second-order rate of change of the public TA value. Thus, the terminal device can determine the size of the public TA value in real time based on the above-mentioned public TA value-related parameter set indicated by the network device. Please refer to Table 1, which is a value table of each parameter in a public TA value-related parameter set provided in an embodiment of the present application. As shown in Table 1, the value range, granularity, and required number of bits corresponding to each parameter in the public TA value-related parameter set are shown.

[0109] Table 1 Value table of each parameter in the relevant parameter set of public TA value

[0110] As can be seen from Table 1, the value range of the public TA initial value is 0 to 270.73 milliseconds (ms); the granularity is 4.07e-3us; and the number of bits required for the network device to indicate the public TA initial value is 23 bits.

[0111] The change rate of the public TA value ranges from -53.33us / s to 53.33us / s, that is, the public TA value changes from -53.33us to +53.33us within 1s; the granularity is 0.2e-3us / s; the number of bits required for the network device to indicate the change rate of the public TA value is 19 bits.

[0112] The second-order rate of change of the public TA value ranges from 0 to 0.60us / s 2 , that is, the rate of change of the common TA value is 0 to 0.60us / s 2 ; Granularity is 0.2e-4us / s 2 ; The number of bits required for the network device to indicate the second-order change rate of the public TA value is 19 bits.

[0113] 2. Media Access Control Element (MAC CE) Validation Delay K-mac: The MAC CE validation delay K-mac refers to the RTT between the synchronization reference point and the network device. The synchronization reference point is described below and is not elaborated here.

[0114] 3. Synchronous reference point

[0115] In this application, a synchronization reference point refers to a synchronization reference point in a non-terrestrial network (NTN). Non-terrestrial network communications can also be referred to as satellite communications. In non-terrestrial network communications, the uplink timing synchronization mechanism is related to the location of the synchronization reference point. The following describes how to select the location of the synchronization reference point.

[0116] In one approach, the synchronization reference point is located on the satellite.

[0117] Please refer to Figure 2a, which is a schematic diagram of a synchronization reference point located on a satellite provided by an embodiment of the present application. As shown in Figure 2a, the transmission link between the terminal device 101 and the satellite 103 can be called a service link, and the transmission link between the network device 102 and the satellite 103 can be called a feeder link. Among them, the service link RTT T1 refers to the RTT between the terminal device and the satellite; K-mac refers to the RTT value between the synchronization reference point and the network device. As shown in Figure 2a, since the synchronization reference point is located on the satellite, the RTT between the synchronization reference point and the satellite is 0, that is, the public TA value is 0. In this case, the network device does not need to indicate the public TA value to the terminal device, so that the signaling overhead of the network device can be saved to a certain extent.

[0118] In this embodiment, a terminal device-specific TA compensation value (i.e., the RTT between the terminal device and the satellite, i.e., the RTT of the service link) is determined by the terminal device based on the terminal device's location information and satellite ephemeris information indicated by the network device. The location information is determined by the terminal device based on the global navigation satellite system (GNSS).

[0119] In this implementation, the terminal device only compensates for the RTT of the service link, while the network device itself determines the RTT between the network device and the synchronization reference point (satellite). Therefore, this implementation increases the timing complexity of the network device and creates the possibility of misalignment between the uplink and downlink timing on the network device side.

[0120] Alternatively, the synchronization reference point is located on the network device.

[0121] Please refer to Figure 2b, which is a schematic diagram of a synchronization reference point located on a network device, provided in an embodiment of the present application. As shown in Figure 2b, the transmission link between terminal device 101 and satellite 103 can be referred to as a service link, and the transmission link between network device 102 and satellite 103 can be referred to as a feeder link. The service link RTT T1 refers to the RTT between the terminal device and the satellite; the public TA value T2 refers to the RTT between the synchronization reference point and the satellite.

[0122] As shown in Figure 2b, since the synchronization reference point is located on the network device, the RTT between the synchronization reference point and the network device is 0, that is, the MAC CE validation delay K-mac is 0. In this case, the terminal device's uplink timing synchronization needs to compensate for the RTT between the synchronization reference point (i.e., the network device) and the satellite, that is, the common TA value. In this case, the network device needs to indicate the common TA value to the terminal device.

[0123] In this implementation, since the uplink timing compensation value of the terminal device includes the RTT of the service link and the TA value of the feeder link (i.e., complete partial TA compensation), adopting this implementation not only ensures that the uplink and downlink timing of the network device are synchronized, but also reduces the timing complexity of the network device.

[0124] In another approach, the location of the synchronization reference point is determined by network equipment.

[0125] In this implementation, since the position of the synchronization reference point is determined by the network device, the synchronization reference point can be located at any position on the transmission link from the terminal device to the network device.

[0126] Please refer to Figure 2c, which is a schematic diagram of a network device determining a synchronization reference point provided by an embodiment of the present application. The transmission link between the terminal device 101 and the satellite 103 can be referred to as a service link, and the transmission link between the network device 102 and the satellite 103 can be referred to as a feeder link. The service link RTT T1 refers to the RTT between the terminal device and the satellite; the public TA value T2 refers to the RTT between the synchronization reference point and the satellite; and K-mac refers to the RTT between the synchronization reference point and the network device. As shown in Figure 2c, the synchronization reference point is located on the feeder link.

[0127] In this implementation, uplink timing synchronization of the terminal device requires compensation for the RTT between the synchronization reference point and the satellite, i.e., the common TA value. In this case, the network device needs to indicate the common TA value to the terminal device. If the synchronization reference point determined by the network device is located on the feeder link between the network device and the satellite, the common TA value can be a positive number; if the synchronization reference point determined by the network device is located on the serving link between the terminal device and the satellite, the common TA value can be a negative number.

[0128] In this implementation, since the location of the synchronization reference point is determined by the network device, the uplink and downlink timing of the network device can be aligned or not. When the synchronization reference point is located on the network device, the uplink and downlink timing of the network device are aligned; when the synchronization reference point is not located on the network device, the uplink and downlink timing of the network device are not aligned. In this case, when the terminal device calculates the RTT of the entire transmission link (i.e., the service link and the feeder link), it must first determine the value of K-mac. Optionally, the value of K_mac can be indicated to the terminal device by the network through system information.

[0129] Regarding the aforementioned method where the synchronization reference point is located on a network device and the method where the location of the synchronization reference point is determined by the network device, the terminal device needs to include the common TA value (T2) when calculating the uplink transmission timing advance. This common TA value can be notified to the terminal device by the network device via system information. However, as the satellite moves, the common TA value will also change continuously. To this end, the network device also determines the validity period of the common TA value. When the network device indicates the common TA value to the terminal device, it may include the following three parameters: a reference time point, the validity period of the common TA value, and the common TA value corresponding to the reference time point. Therefore, based on these three parameters, the terminal device can first ensure that the parameters of the uplink transmission time are valid (i.e., the uplink transmission time point is within the reference time point) and then determine the common TA value corresponding to the uplink transmission time point. If the uplink transmission time point is no longer valid (i.e., the uplink transmission time point is outside the reference time point), the terminal device can re-acquire these three parameters and, through random access, obtain a closed-loop TA adjustment value, thereby resuming uplink data transmission.

[0130] Optionally, the closed-loop TA adjustment value will be described later and will not be described here.

[0131] 4. Delay value K-offset

[0132] In satellite communication systems, the delay value K-offset is used to determine the uplink data scheduling delay. The delay value K-offset is an additional delay value based on the scheduling delay in terrestrial communication systems.

[0133] In satellite communication systems, there is a significant offset between downlink and downlink frame timings of terminal devices, meaning that a significant timing advance is required when sending uplink data. However, the scheduling delay in terrestrial communication systems cannot meet the timing advance requirements of terminal devices in satellite communication scenarios. Therefore, to further increase the scheduling delay, a delay value, K-offset, is added to the scheduling delay in terrestrial communication systems.

[0134] Since the timing of receiving downlink data (such as the physical downlink shared channel (PDSCH)) is a separate reference to the downlink timing, it is not affected by the misalignment of the uplink and downlink frame timing of the terminal device. Therefore, there is no need to increase the delay value K-offset in the timing of PDSCH reception. Other timing relationships involving uplink and downlink interactions can increase the delay value K-offset based on the transmission timing of the uplink and downlink interactions (such as the uplink and downlink transmission timing in the terrestrial communication system).

[0135] Optionally, the timing relationship of the uplink and downlink interactions that require increasing the delay value K-offset is as follows:

[0136] (1) The timing of uplink data transmission scheduled by downlink control information (DCI), including channel state information carried on the physical uplink shared channel.

[0137] (2) Timing of uplink data transmission scheduled by random access response (RAR) (including RAR and fallbackRAR).

[0138] (3) The timing of the first uplink data transmission opportunity in pre-configured resource type 2 (i.e., uplink pre-configured resources triggered by DCI).

[0139] (4) The transmission timing of the HARQ acknowledgment (ACK) information (HARQ-ACK) carried on the physical uplink control channel (PUCCH).

[0140] (5) The transmission timing of the physical random access channel (PRACH) triggered by the physical downlink control channel (PDCCH) order.

[0141] (6) The delay in the effectiveness of the timing advance adjustment command (TA command).

[0142] (7) Transmission timing of the aperiodic sounding reference signal (SRS).

[0143] (8) Timing of channel state information (CSI) reference resources.

[0144] Taking the downlink control information scheduling uplink data transmission as an example, assuming that the terminal device receives the downlink control information in time slot n, according to the resource scheduling method of the terrestrial communication system, the downlink control information will indicate a physical uplink shared channel (PUSCH) scheduling delay K2. Based on the scheduling delay value K2, the terminal device can determine that the time slot where the uplink data transmission is located is n+K2. Since the scheduling delay n+K2 in the terrestrial communication system cannot meet the timing advance required by the terminal device in the satellite communication scenario, the terminal device can also determine a delay value K-offset in the satellite communication system. Thus, the terminal device can determine the final uplink data scheduling delay based on the scheduling delay K2 indicated in the downlink control information and the delay value K-offset. Furthermore, the terminal device can use the uplink data scheduling delay to determine the time slot where the uplink data transmission is located. The time slot where the terminal device actually sends the uplink data needs to be sent in advance according to the determined timing advance.

[0145] For example, please refer to Figure 3, which is a schematic diagram of an uplink data scheduling timing provided by an embodiment of the present application. As shown in Figure 3, the terminal device receives downlink control information in time slot n; based on the scheduling delay K2 indicated by the downlink control information and the delay value K-offset, the uplink data scheduling delay m = n + K2 + K-offset can be determined. Thus, the terminal device can determine that the time slot in which the uplink data transmission occurs (i.e., the time domain resource location of the uplink data transmission) is n + K2 + K-offset.

[0146] In satellite communication systems, satellite altitudes can reach hundreds to tens of thousands of kilometers, resulting in transmission delays far exceeding those in terrestrial network communications. For example, a satellite in geosynchronous orbit (GEO) orbits at an altitude of approximately 35,786 kilometers, resulting in transmission delays exceeding 100ms between the satellite and ground-based terminal devices. Furthermore, in low-Earth orbit (LEO) satellites, the satellite's high mobility introduces a significant Doppler effect, resulting in Doppler shift and delay variation rates far exceeding those observed in terrestrial network communications. For example, in LEO-600 (a 600km low-Earth orbit satellite), satellite speeds can reach 7.56km / s. At low elevation angles, Doppler shift can exceed 20 parts per million (ppm). Furthermore, in LEO satellite communication scenarios, cell coverage is much smaller than in high-Earth orbit satellite communication scenarios. Consequently, terminal devices face frequent cell handovers, which severely impacts service continuity and creates significant signaling overhead. Therefore, in the low-orbit satellite communication scenario, how to reduce the frequency of cell switching of terminal equipment and ensure business continuity is a problem that needs to be solved at present.

[0147] An embodiment of the present application provides a communication method, wherein: a network device may determine first information, the first information being used to configure at least one set of ephemeris information parameters corresponding to a cell accessed by a terminal device; the network device sends the first information, and the terminal device accordingly receives the first information; and the terminal device determines first ephemeris information for time-frequency synchronization based on the first information. It can be seen that, using this embodiment of the present application, a terminal device may receive at least one set of ephemeris information parameters corresponding to the cell accessed by the terminal device, thereby facilitating a reduction in the frequency of cell handoffs. For example, by forming a cell using multiple satellites to provide service to the terminal device, the number of cell handoffs performed by the terminal device may be reduced.

[0148] In addition, the terminal device can determine the ephemeris information parameter set used for time-frequency synchronization based on at least one ephemeris information parameter set. In this way, the corresponding service links during data transmission between the terminal device and the network device via different satellites are different, and the feeder circuits between different satellites and the communication gateway (such as the network device) are also different. Therefore, in a scenario where a cell may correspond to multiple satellites, when the terminal device switches between the service link and the feeder link within the same cell, it can use the determined ephemeris information parameter set for time-frequency synchronization to perform time-frequency synchronization.

[0149] The communication method provided in the embodiments of the present application is described below with reference to the accompanying drawings.

[0150] Please refer to Figure 4, which is a flow chart of a communication method provided in an embodiment of the present application. As shown in Figure 4, the communication method may include but is not limited to the following steps:

[0151] S401. A network device determines first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by a terminal device.

[0152] Each of the at least one ephemeris information parameter set is associated with a different satellite.

[0153] S402: The network device sends first information, and correspondingly, the terminal device receives the first information.

[0154] Optionally, the first information may be carried in higher layer signaling (such as system information).

[0155] S403. The terminal device determines a first ephemeris information parameter set for time-frequency synchronization based on the first information.

[0156] Taking implementation methods 1.1 to 1.3 as examples, the following respectively describes implementation methods in which the first information is also used to configure different ephemeris information parameter sets associated with different synchronization signal blocks (SSBs); or, the first information is also used to configure different ephemeris information parameter sets associated with different SSB groups; or, the first information is also used to configure different ephemeris information parameter sets associated with different bandwidth parts (BWPs).

[0157] In implementation 1.1, the first information is further used to configure different ephemeris information parameter sets associated with different SSBs. In other words, different SSBs are associated with different ephemeris information parameter sets.

[0158] In this embodiment, the terminal device determines the first ephemeris information parameter set for time and frequency synchronization based on the first information, which may include: selecting the ephemeris information parameter set associated with the first synchronization signal block SSB as the first ephemeris information parameter set for time and frequency synchronization based on the first information; wherein the first SSB is determined based on the current SSB measurement result of the terminal device or the current position information of the terminal device.

[0159] Among them, the SSB corresponding to the service beam of the terminal device can be the first SSB.

[0160] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0161] Optionally, the terminal device determines the first SSB based on the current SSB measurement result, which may include: selecting an SSB that meets the reference signal receiving power (RSRP) condition from the current SSB measurement result as the first SSB.

[0162] Optionally, the RSRP condition may be that the RSRP measurement value is greater than an RSRP threshold, and the RSRP threshold may be preset (for example, specified by the protocol), or indicated by the network device (for example, the network device indicates the RSRP threshold to the terminal device through the rsrp-ThresholdSSB parameter), or determined by negotiation between the network device and the terminal device, or determined by the terminal device through other means, which is not limited in this application.

[0163] For example, assuming that the first information is used to configure the ephemeris information parameter sets associated with three SSBs, such as ephemeris information parameter set 1 corresponding to SSB1, ephemeris information parameter set 2 corresponding to SSB2, and ephemeris information parameter set 3 corresponding to SSB3, and the terminal device determines that the first SSB is SSB2 based on the current SSB measurement result. In this case, the terminal device can determine, from the ephemeris information parameter sets associated with the three SSBs, ephemeris information parameter set 2 associated with SSB2 as the first ephemeris information parameter set used by the terminal device for time and frequency synchronization.

[0164] In implementation 1.2, the first information is further used to configure different ephemeris information parameter sets associated with different SSB groups. In other words, different SSB groups are associated with different ephemeris information parameter sets.

[0165] In this embodiment, the terminal device determines the first ephemeris information parameter set for time and frequency synchronization based on the first information, which may include: selecting the ephemeris information parameter set associated with the SSB group to which the first synchronization broadcast signal block SSB belongs as the first ephemeris information parameter set for time and frequency synchronization based on the first information; wherein the first SSB is determined based on the current SSB measurement result of the terminal device or the current position information of the terminal device.

[0166] Among them, the SSB corresponding to the service beam of the terminal device can be the first SSB.

[0167] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0168] Optionally, the terminal device determines the first SSB based on the current SSB measurement result. For the relevant description, please refer to the relevant description of the terminal device determining the first SSB based on the current SSB measurement result in the aforementioned implementation 1.1, which will not be repeated here.

[0169] In this embodiment, different SSB groups each include multiple SSBs. After determining the first SSB, the terminal device further determines the SSB group to which the first SSB belongs from the first information based on the first SSB.

[0170] For example, it is assumed that the first information is used to configure the ephemeris information parameter sets associated with the three SSB groups, and the multiple SSB member information respectively contained in the three SSB groups (that is, the index information of the multiple SSBs respectively contained in the three SSB groups). For example, the ephemeris information parameter sets associated with the three SSB groups are ephemeris information parameter set 1 corresponding to SSB group A, ephemeris information parameter set 2 corresponding to SSB group B, and ephemeris information parameter set 3 corresponding to SSB group C; the multiple SSBs included in SSB group A are SSB1, SSB2, and SSB3, the multiple SSBs included in SSB group B are SSB4, SSB5, SSB6, and SSB7, and the multiple SSBs included in SSB group C are SSB8, SSB9, and SSB10. Assume that the first SSB determined by the terminal device based on the current SSB measurement result or the current position information is SSB8. In this case, the terminal device can determine that the SSB group to which the first SSB (SSB8) belongs is SSB group C based on the multiple SSBs contained in the three SSB groups in the first information; and select the ephemeris information parameter set 3 associated with SSB group C from the first information as the first ephemeris information parameter set for time and frequency synchronization.

[0171] In implementation 1.3, the first information is further used to configure different ephemeris information parameter sets associated with different bandwidth parts (BWPs), that is, different BWPs are associated with different ephemeris information parameter sets.

[0172] In this embodiment, the terminal device determines the first ephemeris information parameter set for time and frequency synchronization based on the first information, which may include: selecting the ephemeris information parameter set associated with the currently activated bandwidth part BWP in the cell accessed by the terminal device based on the first information as the first ephemeris information parameter set for time and frequency synchronization.

[0173] Optionally, the terminal device also determines a currently activated BWP in the cell accessed by the terminal device.

[0174] For example, assume that the first information is used to configure ephemeris information parameter sets associated with four BWPs, such as ephemeris information parameter set 1 associated with BWP1, ephemeris information parameter set 2 associated with BWP2, ephemeris information parameter set 3 associated with BWP3, and ephemeris information parameter set 4 associated with BWP4. Assume that the terminal device determines that the currently activated BWP in the cell accessed by the terminal device is BWP4. In this case, the terminal device may select ephemeris information parameter set 4 associated with BWP4 as the first ephemeris information parameter set for time-frequency synchronization based on the ephemeris information parameter sets associated with the four BWPs included in the first information.

[0175] In an optional embodiment, the first information is further used to configure an ephemeris information parameter set for a reference satellite among multiple satellites corresponding to the cell accessed by the terminal device, as well as orbital distances of satellites other than the reference satellite relative to the reference satellite. This reduces signaling overhead for the network device, compared to a method in which the network device sends at least one ephemeris information parameter set for configuring the cell accessed by the terminal device to the terminal device.

[0176] In one embodiment, a terminal device determines a first ephemeris information parameter set for time-frequency synchronization based on first information, which may include: determining, based on the first information, at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device; and determining, from the at least one ephemeris information parameter set, the first ephemeris information parameter set for time-frequency synchronization. Optionally, the manner in which the terminal device determines the first ephemeris information parameter set for time-frequency synchronization from the at least one ephemeris information parameter set can be found in the description of the terminal device determining the first ephemeris information for time-frequency synchronization based on the first information in any of the aforementioned embodiments 1.1 to 1.3, and is not further elaborated here.

[0177] In an optional embodiment, after step S303, the terminal device may further calculate the Doppler frequency shift on the service link based on the first ephemeris information parameter set and the location information of the terminal device; perform uplink frequency synchronization based on the Doppler frequency shift; and / or calculate the round-trip propagation delay on the service link based on the first ephemeris information parameter set and the location information of the terminal device; and perform uplink timing synchronization based on the round-trip propagation delay on the service link.

[0178] In an embodiment of the present application, a terminal device can receive at least one ephemeris information parameter set corresponding to the cell to which the terminal device is connected, thereby facilitating a reduction in the frequency of cell handovers. Furthermore, the terminal device can determine an ephemeris information parameter set for time-frequency synchronization based on the at least one ephemeris information parameter set, thereby facilitating the terminal device to utilize the ephemeris information parameter set for time-frequency synchronization.

[0179] Please refer to Figure 5, which is a flowchart of an uplink timing synchronization method provided by an embodiment of the present application. As shown in Figure 5, the method may include but is not limited to the following steps:

[0180] S501. The network device determines second information, where the second information is used to configure at least one common timing advance (TA) configuration parameter set corresponding to a cell accessed by a terminal device.

[0181] Each of the at least one public TA configuration parameter set is associated with a different satellite.

[0182] S502: The network device sends the second information, and correspondingly, the terminal device receives the second information.

[0183] Optionally, the second information may be carried in higher layer signaling (such as system information).

[0184] S503. The terminal device determines a first public TA configuration parameter set based on the second information.

[0185] Taking implementation methods 2.1 to 2.3 as examples, the following respectively describes implementation methods in which the second information is also used to configure different public TA configuration parameter sets associated with different SSBs; or, the second information is also used to configure different public TA configuration parameter sets associated with different SSB groups; or, the second information is also used to configure different public TA configuration parameter sets associated with different BWPs.

[0186] In implementation 2.1, the second information is further used to configure different public TA configuration parameter sets associated with different SSBs. That is, different SSBs are associated with different public TA configuration parameter sets.

[0187] In this embodiment, the terminal device determines the first public TA configuration parameter set based on the second information, which may include: selecting the public TA configuration parameter set associated with the first SSB as the first public TA configuration parameter set based on the second information; wherein the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0188] Among them, the SSB corresponding to the service beam of the terminal device can be the first SSB.

[0189] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0190] Optionally, the terminal device determines the first SSB based on the current SSB measurement result. For the relevant description, please refer to the relevant description of the terminal device determining the first SSB based on the current SSB measurement result in the aforementioned implementation 1.1, which will not be repeated here.

[0191] In implementation 2.2, the second information is further used to configure different public TA configuration parameter sets associated with different SSB groups. That is, different SSB groups are associated with different public TA configuration parameter sets.

[0192] In this embodiment, the terminal device determines the first public TA configuration parameter set based on the second information, which may include: selecting, based on the second information, a public TA configuration parameter set associated with the SSB group to which the first SSB belongs as the first public TA configuration parameter set; wherein the first SSB is determined based on a current SSB measurement result of the terminal device or current location information of the terminal device. The first SSB is the SSB corresponding to the serving beam of the current terminal device.

[0193] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0194] Optionally, the terminal device determines the first SSB based on the current SSB measurement result. For the relevant description, please refer to the relevant description of the terminal device determining the first SSB based on the current SSB measurement result in the aforementioned implementation 1.1, which will not be repeated here.

[0195] In embodiment 2.3, the second information is further used to configure different public TA configuration parameter sets associated with different BWPs. That is, different BWPs are associated with different public TA configuration parameter sets.

[0196] In this embodiment, the terminal device determines the first public TA configuration parameter set based on the second information, which may include: selecting the public TA configuration parameter set associated with the currently activated bandwidth part BWP in the cell accessed by the terminal device as the first public TA configuration parameter set based on the second information.

[0197] Optionally, the terminal device also determines a currently activated BWP in the cell accessed by the terminal device.

[0198] S504. The terminal device determines a public TA value according to the first public TA configuration parameter set.

[0199] In an optional embodiment, the terminal device determining a common TA value according to the first common TA configuration parameter set may include: determining the common TA value according to the first common TA configuration parameter set and a reference time point, wherein the reference time point is indicated to the terminal device by the network device.

[0200] Optionally, the first public TA value configuration parameter set includes a public TA initial value, a rate of change of the public TA value, and a second-order rate of change of the public TA value. Thus, the terminal device can determine the public TA value based on the public TA initial value, the rate of change of the public TA value, the second-order rate of change of the public TA value, and a reference time point.

[0201] Optionally, when the terminal device determines the public TA value based on the public TA initial value, the rate of change of the public TA value, the second-order rate of change of the public TA value, and the reference time point, it can first determine the one-way public transmission delay Delay between the satellite and the synchronization reference point. common (t); according to Delay common (t) Determine the common TA value.

[0202] Optionally, the terminal device can use the following formula (1) to determine Delay common (t).

[0203] In formula (1), Delay common (t) can be understood as the distance between the satellite and the uplink synchronization reference point divided by the speed of light; TACommon represents the initial value of the common TA; TACommonDrift represents the rate of change of the common TA value; TACommonDriftVariation represents the second-order rate of change of the common TA value; t epoch It represents the reference time point; t represents the current time.

[0204] Optionally, the terminal device can common(t) When determining the common TA value, the following formula (2) can be used.

[0205] N TA,common =2Delay common (t) (2)

[0206] In formula (2), N TA,common It represents the public TA value.

[0207] S505: The terminal device determines a timing advance TA value for uplink transmission according to the public TA value and the round-trip propagation delay on the service link.

[0208] In an optional embodiment, the terminal device determines the timing advance TA value of the uplink transmission based on the common TA value and the round-trip propagation delay on the service link, which may include: determining the adjustment value of the TA value and the delay value K-offset, the delay value K-offset value is used to determine the uplink data scheduling delay; determining the timing advance TA value of the uplink transmission based on the common TA value, the round-trip propagation delay on the service link, the adjustment value of the TA value and the delay value K-offset.

[0209] In this embodiment, the adjustment value of the TA value can be recorded as N TA , N TA It is the TA adjustment value indicated by TA Common (the same as in traditional terrestrial networks).

[0210] Optionally, when the terminal device receives MAC CE TACommon, the terminal device may use the following formula (3) to determine N TA .

[0211] N TA =N TAold +(T A -31)·16·64 / 2 μ (3)

[0212] In formula (4), T AN is the timing advance adjustment value indicated by the network device through the MAC CE TA command; TAold Indicates the current uplink timing advance.

[0213] Optionally, when the TACommon received by the terminal device is carried in a random access response (RAR) message (or msg2 or msgB), the terminal device may use the following formula (4) to determine N TA .

[0214] N TA =T A ·16·64 / 2 μ (4)

[0215] In formula (5), T A It is the timing advance adjustment value indicated by the network device through the RAR message.

[0216] In this implementation, the delay value K-offset can be recorded as N TA,offset , N TA,offset It can be preset (eg, specified in the protocol).

[0217] In this embodiment, the round-trip propagation delay on the service link can be recorded as N TA,UE-specific , N TA,UE-specific It can be calculated by the terminal device based on the first ephemeris information parameter set determined above and the location information of the terminal device.

[0218] In this embodiment, the common TA value can be recorded as N TA,Common , N TA,Common It can be calculated by referring to the above formula (1) and formula (2).

[0219] Optionally, the terminal device can TA 、N TA,offset 、N TA,UE-specific and N TA,Common When determining the timing advance TA value for uplink transmission, the following formula (5) may be used.

[0220] T TA =(N TA +N TA,UE-specific +N TA,common +N TA,offset )×T S (5)

[0221] In formula (3), T TA It represents the timing advance TA value of uplink transmission; T SIt represents the smallest unit of time in the fifth-generation (5G) communication system.

[0222] Optionally, the timing advance TA value of the uplink transmission may be a timing advance determined when the terminal device is performing uplink data transmission in an idle state or a linked state.

[0223] In formula (5), the TA on the service link (i.e., N TA,UE-specific ) and the public TA value (ie N TA,Common ) requires mid-range devices to update themselves, so N TA,UE-specific and N TA,Common Understand it as an open loop TA adjustment mechanism. The TA adjustment value indicated by the traditional TA Common (i.e. N TA ) is estimated by the network device based on the signal transmitted uplink by the terminal device, and then sent to the terminal device. Therefore, N TA It can be understood as a closed-loop TA adjustment mechanism. It can be seen that the determination and update of the timing advance TA value of uplink transmission adopts both the open-loop TA adjustment mechanism and the closed-loop TA adjustment mechanism.

[0224] However, the terminal device autonomously determines the open-loop TA adjustment value (ie, N TA,UE-specific and N TA,Common ), over time, the open-loop TA adjustment value calculated by the terminal device may produce a certain residual error. This residual error will be reflected by the closed-loop TA adjustment value indicated by the network device through TA Common (i.e., N TA ) for compensation. However, when the first ephemeris information parameter set, the terminal device's location information, and the first public TA configuration parameter set are updated, the residual error may be compensated again, which may lead to a secondary compensation problem for the TA adjustment error. In other words, when the terminal device uses both an open-loop TA adjustment mechanism and a closed-loop TA adjustment mechanism to determine the timing advance TA value for uplink transmission, a secondary compensation problem may occur.

[0225] Optionally, the terminal device may address the quadratic compensation problem when determining the timing advance TA value for uplink transmission by satisfying an uplink timing synchronization requirement, where the requirement is predefined (eg, defined in a protocol).

[0226] Please refer to Figure 6, which is a flow chart of another communication method provided in an embodiment of the present application. The difference from the communication method shown in Figure 4 is that in the communication method shown in Figure 6, the first information is used to configure at least one MAC CE validity delay corresponding to the cell accessed by the terminal device. As shown in Figure 6, the communication method may include but is not limited to the following steps:

[0227] S601. A network device determines first information, where the first information is used to configure at least one media access layer control element MAC CE validity delay K-mac corresponding to a cell accessed by a terminal device.

[0228] The MAC CE validation delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device. The synchronization reference point is a location on the transmission link between the terminal device and the network device.

[0229] Optionally, for the relevant description of the synchronization reference point, please refer to the description in the aforementioned concept description section, which will not be repeated here.

[0230] S602: The network device sends the first information, and correspondingly, the terminal device receives the first information.

[0231] S603: The terminal device determines, based on the first information, a MAC CE validation delay K-mac when the terminal device transmits data with network devices via different satellites.

[0232] Taking implementation methods 3.1 to 3.3 as examples, the following respectively describes the implementation methods in which the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal blocks SSB; or, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal block SSB groups; or, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different bandwidth parts BWP.

[0233] In implementation mode 3.1, the first information is further used to configure different MAC CE validity delays K-mac associated with different synchronization signal blocks SSB. In other words, different MAC CE validity delays K-mac are not associated with SSB.

[0234] In this embodiment, the terminal device determines the MAC CE validity delay K-mac when the terminal device transmits data with the network device through different satellites based on the first information, which may include: selecting the MAC CE validity delay K-mac associated with the first synchronization signal block SSB based on the first information as the MAC CE validity delay K-mac when the terminal device transmits data with the network device through the satellite associated with the first SSB; wherein the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0235] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0236] Optionally, the terminal device determines the first SSB based on the current SSB measurement result. For the relevant description, please refer to the relevant description of the terminal device determining the first SSB based on the current SSB measurement result in the aforementioned implementation 2.1, which will not be repeated here.

[0237] For example, assume that the first information is used to configure the MAC CE validity delays K-mac associated with three SSBs, such as the MAC CE validity delay K-mac1 corresponding to SSB1, the MAC CE validity delay K-mac2 corresponding to SSB2, and the MAC CE validity delay K-mac3 corresponding to SSB3. The terminal device determines that the first SSB determined based on the current SSB measurement result is SSB2. In this case, the terminal device can determine, from the MAC CE validity delays K-mac associated with the three SSBs, that the MAC CE validity delay K-mac2 associated with SSB2 is the MAC CE validity delay K-mac used when the terminal device transmits data with the network device via the satellite associated with SSB2.

[0238] In implementation mode 3.2, the first information is further used to configure different MAC CE validity delays K-mac associated with different synchronization signal block SSB groups. In other words, different MAC CE validity delays K-mac are not associated with SSB groups.

[0239] In this embodiment, the terminal device determines, based on the first information, the MAC CE validity delay K-mac when the terminal device transmits data with the network device through different satellites, which may include: based on the first information, selecting the MAC CE validity delay K-mac associated with the SSB group to which the first synchronization signal block SSB belongs, as the MAC CE validity delay K-mac when the terminal device transmits data with the network device through the satellite associated with the SSB group to which the first SSB belongs; wherein the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

[0240] Optionally, the terminal device also determines the first SSB based on the current SSB measurement result or the current location information of the terminal device.

[0241] Optionally, the terminal device determines the first SSB based on the current SSB measurement result. For the relevant description, please refer to the relevant description of the terminal device determining the first SSB based on the current SSB measurement result in the aforementioned implementation 2.1, which will not be repeated here.

[0242] For example, assume that the first information is used to configure the MAC CE effectiveness delay K-mac associated with the three SSB groups, as well as the multiple SSB member information contained in the three SSB groups (that is, the index information of the multiple SSBs contained in the three SSB groups). For example, the MAC CE effectiveness delay K-mac associated with the three SSB groups is the MAC CE effectiveness delay K-mac1 corresponding to SSB group A, the MAC CE effectiveness delay K-mac2 corresponding to SSB group B, and the MAC CE effectiveness delay K-mac3 corresponding to SSB group C; the multiple SSBs included in SSB group A are SSB1, SSB2, and SSB3, the multiple SSBs included in SSB group B are SSB4, SSB5, SSB6, and SSB7, and the multiple SSBs included in SSB group C are SSB8, SSB9, and SSB10. Assume that the first SSB determined by the terminal device based on the current SSB measurement result or the current location information is SSB8. In this case, the terminal device can determine that the SSB group to which the first SSB (SSB8) belongs is SSB group C based on the multiple SSBs contained in the three SSB groups in the first information; select the MAC CE effectiveness delay K-mac3 associated with SSB group C from the first information as the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through the satellite associated with SSB group C to which SSB8 belongs.

[0243] In implementation 3.3, the first information is further used to configure different MAC CE validity delays K-mac associated with different bandwidth parts BWP. In other words, different MAC CE validity delays K-mac are not associated with BWP.

[0244] In this implementation, the terminal device determines, based on the first information, a MAC CE validity delay K-mac when the terminal device performs data transmission with the network device via different satellites, which may include: selecting, based on the first information, a MAC CE validity delay K-mac associated with the first bandwidth part BWP as the MAC CE validity delay K-mac when the terminal device performs data transmission with the network device via the first satellite; wherein the first BWP is a BWP currently activated by the terminal device, and the first satellite is a satellite that provides services to the terminal device via the first BWP.

[0245] For example, assume that the first information is used to configure the MAC CE validity delays K-mac associated with four BWPs, such as the MAC CE validity delay K-mac1 associated with BWP1, the MAC CE validity delay K-mac2 associated with BWP2, the MAC CE validity delay K-mac3 associated with BWP3, and the MAC CE validity delay K-mac4 associated with BWP4. Assume that the terminal device determines that the currently activated BWP in the cell accessed by the terminal device is BWP4. In this case, the terminal device can select the MAC CE validity delay K-mac4 associated with BWP4 as the MAC CE validity delay K-mac when the terminal device transmits data with the network device via the first satellite based on the MAC CE validity delays K-mac associated with the four BWPs included in the first information. The first satellite is the satellite that provides services to the terminal device via BWP4.

[0246] In an embodiment of the present application, the terminal device can determine the corresponding MAC CE effectiveness delay K-mac when data is transmitted through different satellites and network devices, which is beneficial for the terminal device to use the MAC CE effectiveness delay K-mac to determine the uplink data transmission timing.

[0247] Please refer to Figure 7, which is a flow chart of another communication method provided by an embodiment of the present application. In the communication method shown in Figure 7, the terminal device can determine a delay value K-offset, which is used to determine the uplink data scheduling delay. As shown in Figure 7, the communication method may include but is not limited to the following steps:

[0248] S701. The terminal device sends the timing advance TA value for uplink transmission, and the SSB, SSB group, BWP or identification information associated with the TA value. Correspondingly, the network device receives the TA value, and the SSB, SSB group, BWP or identification information associated with the TA value.

[0249] Among them, different SSBs, SSB groups, or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs. For example, in method 1, different SSBs or SSB information are associated with different satellites. In this way, after the terminal device sends the SSB associated with the TA value, the network device can determine the satellite corresponding to the TA value based on the SSB associated with the TA value, and then determine the delay value K-offset used by the terminal device to determine the uplink data scheduling delay based on the satellite corresponding to the TA value. In method 2, different SSB groups or SSB group information are associated with different satellites. In this way, after the terminal device sends the SSB associated with the TA value, the network device can determine the satellite corresponding to the TA value based on the SSB group associated with the TA value, and then determine the delay value K-offset used by the terminal device to determine the uplink data scheduling delay based on the satellite corresponding to the TA value. In Method 3, different identification information is associated with different satellites. In this way, after the terminal device sends the identification information associated with the TA value, the network device can determine the satellite corresponding to the TA value based on the identification information associated with the TA value, and then determine the delay value K-offset used by the terminal device to determine the uplink data scheduling delay based on the satellite corresponding to the TA value. In Method 4, different satellites provide services to the terminal device through different BWPs. In this way, the network device can determine the satellite corresponding to the TA value based on the BWP associated with the TA value, and then determine the delay value K-offset used by the terminal device to determine the uplink data scheduling delay based on the satellite corresponding to the TA value.

[0250] Optionally, the timing advance TA value of uplink data transmission can be determined by the terminal device according to the method shown in Figure 4 above, which will not be described in detail here.

[0251] S702. The network device sends a delay value K-offset for determining an uplink data scheduling delay. Correspondingly, the terminal device receives the delay value K-offset for determining an uplink data scheduling delay.

[0252] In an embodiment of the present application, the terminal device may report the timing advance TA value of the uplink transmission, as well as the SSB, SSB group, BWP or identification information associated with the TA value to the network device. In this way, the network device determines the satellite corresponding to the TA value based on the SSB, SSB group, BWP or identification information associated with the TA value. Then, the network device sends the delay value K-offset for determining the uplink data scheduling delay to the terminal device based on the satellite corresponding to the TA value, which is beneficial for the terminal device to determine the uplink data scheduling delay.

[0253] Please refer to Figure 8, which is a flowchart of another communication method provided by an embodiment of the present application. The difference from the communication method shown in Figure 7 is that in the communication method shown in Figure 8, the terminal device determines the delay value K-offset based on the third information indicated by the network device. As shown in Figure 8, the communication method may include but is not limited to the following steps:

[0254] S801. The network device determines third information, where the third information is used to configure different delay values ​​K-offset associated with different BWPs.

[0255] The delay value K-offset is used to determine the uplink data scheduling delay.

[0256] S802: The network device sends third information, and correspondingly, the terminal device receives the third information.

[0257] S803. The terminal device selects the K-offset associated with the second BWP according to the third information as the delay value K-offset for the terminal device to determine the uplink data scheduling delay.

[0258] The second BWP is a BWP where a physical downlink shared channel (PDSCH) or a physical downlink control channel (PDCCH) is located.

[0259] For example, assume that the third information is used to configure different delay values ​​K-offset associated with three BWPs, such as the delay value K-offset1 associated with BWP1, the delay value K-offset2 associated with BWP2, and the delay value K-offset3 associated with BWP3. If the terminal device determines that the BWP where the PDSCH or PDCCH is located is BWP3, the terminal device can select the delay value K-offset3 associated with BWP3 based on the third information as the delay value K-offset for determining the uplink data scheduling delay by the terminal device.

[0260] In an embodiment of the present application, the terminal device can receive third information from the network device, and the third information is used to configure different delay values ​​K-offset associated with different BWPs; according to the third information, the delay value K-offset associated with the BWP where the PDSCH or PDCCH is located is selected as the delay value K-offset for the terminal device to determine the uplink data scheduling delay, thereby facilitating the terminal device to determine the uplink data scheduling delay.

[0261] The present application also provides an embodiment, in which the terminal device can determine the starting position of the random access response message window RAR Window according to the MAC CE K-mac when the terminal device performs data transmission and the timing advance TA value of the uplink transmission.

[0262] Optionally, MAC CE K-mac may be determined with reference to the communication method shown in FIG6 .

[0263] Optionally, the timing advance TA value of uplink data transmission may be determined by referring to the method shown in FIG. 5 , which will not be described in detail here.

[0264] Please refer to Figure 9, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 9, the communication device may include a communication unit 901 and a determination unit 902.

[0265] In an optional embodiment, the communication device is used to perform the operations of the terminal device in the communication method described in Figure 4 above, for example: a communication unit 901 is used to receive first information, and the first information is used to configure at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device; a determination unit 902 is used to determine the first ephemeris information parameter set for time-frequency synchronization based on the first information. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 4, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0266] In another optional embodiment, the communication device is used to perform the operations of the network device in the communication method described in Figure 4 above, for example: a determination unit 902 is used to determine the first information, and the first information is used to configure at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device; a communication unit 901 is used to send the first information. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the network device in various optional embodiments of the communication method described in Figure 4, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0267] In another optional embodiment, the communication device is used to perform the operations of the terminal device in the communication method described in Figure 6 above, for example: a communication unit 901 is used to receive first information, and the first information is used to configure at least one media access layer control unit MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device; the MAC CE effectiveness delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device; the synchronization reference point is one of the positions on the transmission link between the terminal device and the network device; the determination unit 902 is used to determine the MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device through different satellites based on the first information. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the terminal device in various optional implementations of the communication method described in Figure 6, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0268] In another optional embodiment, the communication device is used to perform the operations of the network device in the communication method described in Figure 6 above, for example: a determination unit 902 is used to determine the first information, and the first information is used to configure at least one media access layer control unit MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device; the MAC CE effectiveness delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device; the synchronization reference point is one of the positions on the transmission link between the terminal device and the network device; the communication unit 901 is used to send the first information. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the network device in various optional implementations of the communication method described in Figure 6, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0269] In another optional embodiment, the communication device is used to perform the operations of the terminal device in the communication method described in Figure 7 above, for example, the communication unit 901 is used to send the timing advance TA value of the uplink transmission, and the synchronization signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSB, SSB group or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; and receive the delay value K-offset for determining the uplink data scheduling delay. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 7, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0270] In another optional embodiment, the communication device is used to perform the operations of the network equipment in the communication method described in Figure 7 above, for example, the communication unit 901 is used to receive the timing advance TA value of the uplink transmission, and the synchronization signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSB, SSB group or identification information are associated with different satellites, or the terminal equipment is served by different satellites through different BWPs; and a delay value K-offset is sent for determining the uplink data scheduling delay. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the network equipment in various optional embodiments of the communication method described in Figure 7, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0271] In another optional embodiment, the communication device is used to perform the operations of the terminal device in the communication method described in Figure 8 above. For example, the communication unit 901 is used to receive third information, and the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, and the delay value K-offset is used to determine the uplink data scheduling delay; the determination unit 902 is used to select the delay value K-offset associated with the second BWP according to the third information, as the delay value K-offset for the terminal device to determine the uplink data scheduling delay, and the second BWP is the BWP where the physical downlink shared channel PDSCH or the physical downlink control channel PDCCH is located. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 8, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0272] In another optional embodiment, the communication device is used to perform the operations of the network device in the communication method described in Figure 8 above. For example, the determination unit 902 is used to determine the third information, and the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, and the delay value K-offset is used to determine the uplink data scheduling delay; the communication unit 901 is used to send the third information. Optionally, the communication unit 901 and the determination unit 902 can also perform the relevant operations of the network device in various optional embodiments of the communication method described in Figure 8, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0273] Please refer to Figure 10, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application, including a processor 1001, a memory 1002, and a communication bus for connecting the processor 1001 and the memory 1002.

[0274] The communication device may further include a communication interface, which may be used to receive and send data.

[0275] The memory 1002 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or compact disc read-only memory (CD-ROM), and is used to store executed program codes and transmitted data.

[0276] The processor 1001 may be one or more central processing units (CPUs). When the processor 1001 is a CPU, the CPU may be a single-core CPU or a multi-core CPU. The processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0277] In an optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device performs the operations of the terminal device in the communication method described in Figure 4 above, for example: receiving first information, the first information is used to configure at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device; based on the first information, determining the first ephemeris information parameter set for time-frequency synchronization. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the terminal device in various optional implementations of the communication method described in Figure 4, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0278] In another optional embodiment, the processor 1001 may be used to execute the computer program or instruction 1003 stored in the memory 1002, and perform the operations of the network device in the communication method described in FIG4 above, for example: determining the first information, the first information being used to configure at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device; and sending the first information. Optionally, the processor 1001 may be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device may also perform the relevant operations of the network device in the various optional embodiments of the communication method described in FIG4, which will not be described in detail here. It will be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0279] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002 to perform the operations of the terminal device in the communication method described in Figure 6 above, for example: receiving first information, the first information is used to configure at least one media access layer control unit MAC CE validity delay K-mac corresponding to the cell accessed by the terminal device; the MAC CE validity delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device; the synchronization reference point is one of the positions on the transmission link between the terminal device and the network device; based on the first information, determine the MAC CE validity delay K-mac when the terminal device transmits data with the network device through different satellites. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 6, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can refer to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0280] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, and perform the operations of the network device in the communication method described in Figure 6 above, for example: determining the first information, the first information is used to configure at least one media access layer control unit MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device; the MAC CE effectiveness delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device; the synchronization reference point is one of the positions on the transmission link between the terminal device and the network device; sending the first information. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the network device in various optional embodiments of the communication method described in Figure 6, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can refer to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0281] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, and perform the operations of the terminal device in the communication method described in Figure 7 above, for example, sending the timing advance TA value of the uplink transmission, and the synchronous broadcast signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSB, SSB group or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; receive the delay value K-offset for determining the uplink data scheduling delay. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 7, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can refer to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0282] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, and perform the operations of the network device in the communication method described in Figure 7 above, for example, receiving the timing advance TA value of the uplink transmission, and the synchronization signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSBs, SSB groups or identification information are associated with different satellites, or the terminal equipment is served by different satellites through different BWPs; sending a delay value K-offset for determining the uplink data scheduling delay. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the network device in various optional embodiments of the communication method described in Figure 7, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can refer to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0283] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002 to perform the operation of the terminal device in the communication method described in Figure 8 above, for example, receiving third information, the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, and the delay value K-offset is used to determine the uplink data scheduling delay; according to the third information, the delay value K-offset associated with the second BWP is selected as the delay value K-offset for the terminal device to determine the uplink data scheduling delay, and the second BWP is the BWP where the physical downlink shared channel PDSCH or the physical downlink control channel PDCCH is located. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the terminal device in various optional embodiments of the communication method described in Figure 8, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0284] In another optional embodiment, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, and perform the operations of the network device in the communication method described in Figure 8 above, for example, determining the third information, the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, and the delay value K-offset is used to determine the uplink data scheduling delay; and sending the third information. Optionally, the processor 1001 can be used to execute the computer program or instruction 1003 stored in the memory 1002, so that the communication device can also perform the relevant operations of the network device in various optional embodiments of the communication method described in Figure 8, which will not be described in detail here. It can be understood that the beneficial effects that can be achieved by the communication device provided in the embodiment of the present application can be referred to the description of the aforementioned related communication method embodiment, and will not be repeated here.

[0285] An embodiment of the present application further provides a chip, which includes: a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

[0286] An embodiment of the present application also provides a chip module, including a transceiver component and a chip, wherein the chip includes a processor, a memory, and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

[0287] An embodiment of the present application also provides a computer-readable storage medium, wherein the computer storage medium stores a computer program or instructions for signal processing, and when the computer program or instructions are executed, the computer implements some or all of the steps described in any of the above method embodiments.

[0288] The present application also provides a computer program product, including a non-transitory computer-readable storage medium storing a computer program or instructions, which, when executed, implements some or all of the steps described in any of the above method embodiments. The computer program product or instructions may be a software installation package.

[0289] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0290] In the above embodiments, the embodiments of the present application have different focuses on the description of each embodiment. Any multiple embodiments can be used in combination. For parts that are not detailed in a certain embodiment, please refer to the relevant description of other embodiments.

[0291] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0292] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0293] In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units. In other words, the various devices and products described in the above embodiments include units / modules, which may be software units / modules, hardware units / modules, or partly software units / modules and partly hardware units / modules. For example, for each device or product that applies to or integrates a chip, each unit / module contained therein can be implemented in the form of hardware such as circuits, or at least some of the units / modules can be implemented in the form of software programs, which run on the integrated processor inside the chip, and the remaining units / modules can be implemented in the form of hardware such as circuits; for each device or product that applies to or integrates a chip module, each unit / module contained therein can be implemented in the form of hardware such as circuits, and different units / modules can be located in the same part of the chip module (for example, a chip, a circuit unit, etc.) or in different components, at least some / modules can be implemented in the form of software programs, which run on the integrated processor inside the chip module, and the remaining units / modules can be implemented in the form of hardware such as circuits; for each device or product that applies to or integrates a terminal, the units / modules contained therein can be implemented in the form of hardware such as circuits, and different units / modules can be located in the same component (for example, a chip, a circuit unit, etc.) or in different components in the terminal, or at least some of the units / modules can be implemented in the form of software programs, which run on the integrated processor inside the terminal, and the remaining units / modules can be implemented in the form of hardware such as circuits.

[0294] The steps of the method or algorithm described in the embodiments of the present application can be implemented in hardware or by executing software instructions by a processor. The software instructions can be composed of corresponding software units, which can be stored in a USB flash drive, random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, magnetic disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a terminal device or a network device. Of course, the processor and storage medium can also exist in a terminal device or a network device as discrete components.

[0295] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or TRP, etc.) to execute all or part of the steps of the various embodiments of the present application.

[0296] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be implemented in the form of a computer software product. The computer software product is stored in a memory and includes one or more computer instructions for causing a computer device (which can be a personal computer, server, or TRP, etc.) to perform all or part of the steps of the methods of the various embodiments of the present application. The computer device can also be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0297] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application and is not intended to limit the scope of protection of the embodiments of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scopes based on the ideas of the present application. In summary, the content of this specification should not be understood as limiting the present application. In other words, the above is only the specific implementation method of the embodiments of the present application and is not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A communication method, characterized in that: The method comprises: receiving a first message; Determine, according to the first information, a first ephemeris information parameter set for time-frequency synchronization, wherein the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device; or According to the first information, the media access layer control unit MAC CE effectiveness delay K-mac is determined when the terminal device transmits data with the network device through different satellites; the first information is used to configure at least one MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device, and the MAC CE effectiveness delay K-mac is the round-trip propagation delay between the synchronization reference point and the network device, and the synchronization reference point is one of the positions on the transmission link between the terminal device and the network device.

2. The method according to claim 1, characterized in that The determining, according to the first information, a first ephemeris information parameter set for time-frequency synchronization includes: Determine, according to the first information, at least one ephemeris information parameter set corresponding to the cell accessed by the terminal device, wherein the first information is used to configure the ephemeris information parameter set of a reference satellite among multiple satellites corresponding to the cell accessed by the terminal device, and orbital distances of other satellites except the reference satellite relative to the reference satellite; A first ephemeris information parameter set for time-frequency synchronization is determined from the at least one ephemeris information parameter set.

3. The method according to claim 1, characterized in that The determining, according to the first information, a first ephemeris information parameter set for time-frequency synchronization includes: According to the first information, select an ephemeris information parameter set associated with a first synchronization signal block SSB as a first ephemeris information parameter set for time-frequency synchronization; Among them, the first information is also used to configure different ephemeris information parameter sets associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

4. The method according to claim 1, characterized in that: The determining, according to the first information, a first ephemeris information parameter set for time-frequency synchronization includes: According to the first information, selecting an ephemeris information parameter set associated with the SSB group to which the first synchronization signal block SSB belongs as a first ephemeris information parameter set for time and frequency synchronization; Among them, the first information is also used to configure different ephemeris information parameter sets associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

5. The method according to claim 1, characterized in that The determining, according to the first information, a first ephemeris information parameter set for time-frequency synchronization includes: According to the first information, selecting an ephemeris information parameter set associated with a bandwidth part BWP currently activated in a cell accessed by the terminal device as a first ephemeris information parameter set for time-frequency synchronization; The first information is also used to configure different ephemeris information parameter sets associated with different BWPs.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: Calculate the Doppler on the service link according to the first ephemeris information parameter set and the location information of the terminal device frequency shift; performing uplink frequency synchronization according to the Doppler frequency shift; and / or, The round-trip propagation delay on the service link is calculated according to the first ephemeris information parameter set and the location information of the terminal device; and the uplink timing synchronization is performed according to the round-trip propagation delay on the service link.

7. The method according to claim 6, characterized in that The performing uplink timing synchronization according to the round-trip propagation delay on the service link includes: Receive second information; the second information is used to configure at least one common timing advance TA configuration parameter set corresponding to the cell accessed by the terminal device; Determine a first common TA configuration parameter set according to the second information; Determining a common TA value according to the first common TA configuration parameter set; A timing advance TA value for uplink transmission is determined according to the common TA value and the round-trip propagation delay on the service link.

8. The method according to claim 7, characterized in that The determining, according to the second information, a first common TA configuration parameter set includes: According to the second information, selecting a common TA configuration parameter set associated with a first synchronization signal block SSB as a first common TA configuration parameter set; Among them, the second information is also used to configure different public TA configuration parameter sets associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

9. The method according to claim 7, characterized in that: The determining, according to the second information, a first common TA configuration parameter set includes: Selecting, according to the second information, a common TA configuration parameter set associated with the SSB group to which the first SSB belongs as the first common TA configuration parameter set; Among them, the second information is also used to configure different public TA configuration parameter sets associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

10. The method according to claim 7, characterized in that The determining, according to the second information, a first common TA configuration parameter set includes: According to the second information, select a public TA configuration parameter set associated with a bandwidth part BWP currently activated in the cell accessed by the terminal device as a first public TA configuration parameter set; The second information is also used to configure different public TA configuration parameter sets associated with different BWPs.

11. The method according to claim 1, characterized in that: The determining, according to the first information, a MAC CE validity delay K-mac when the terminal device transmits data with network devices through different satellites includes: According to the first information, select the MAC CE validity delay K-mac associated with the first synchronization signal block SSB as the MAC CE validity delay K-mac when the terminal device transmits data with the network device through the satellite associated with the first SSB; Among them, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different SSBs; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

12. The method according to claim 1, characterized in that The determining, according to the first information, a MAC CE validity delay K-mac when the terminal device transmits data with network devices through different satellites includes: According to the first information, select the MAC CE validity delay K-mac associated with the SSB group to which the first synchronization signal block SSB belongs as the MAC CE validity delay K-mac when the terminal device transmits data with the network device through the satellite associated with the SSB group to which the first SSB belongs; Among them, the first information is also used to configure different MAC CE effectiveness delays K-mac associated with different SSB groups; the first SSB is determined based on the current SSB measurement result of the terminal device or the current location information of the terminal device.

13. The method according to claim 1, characterized in that The determining, according to the first information, a MAC CE validity delay K-mac when the terminal device transmits data with network devices through different satellites includes: According to the first information, select the MAC CE validity delay K-mac associated with the first bandwidth part BWP as the MAC CE validity delay K-mac when the terminal device transmits data with the network device through the first satellite; The first information is also used to configure different MAC CE effectiveness delays K-mac associated with different BWPs; the first BWP is the BWP currently activated by the terminal device, and the first satellite is a satellite that provides services for the terminal device through the first BWP.

14. The method according to claim 1, characterized in that The method further comprises: Sending a timing advance TA value for uplink transmission, and a synchronization signal block SSB, SSB group, bandwidth part BWP or identification information associated with the TA value; different SSBs, SSB groups or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; A delay value K-offset is received for determining an uplink data scheduling delay.

15. The method according to claim 1, characterized in that The method further comprises: receiving third information, where the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP, where the delay value K-offset is used to determine the uplink data scheduling delay; According to the third information, the delay value K-offset associated with the second BWP is selected as the delay value K-offset for the terminal device to determine the uplink data scheduling delay, and the second BWP is the BWP where the physical downlink shared channel PDSCH or the physical downlink control channel PDCCH is located.

16. The method according to any one of claims 11 to 13, characterized in that The method further comprises: The starting position of the random access response message window RAR Window is determined according to the MAC CE effectiveness delay K-mac when the terminal device performs data transmission and the timing advance TA value of the uplink transmission.

17. A communication method, characterized in that: The method further comprises: Determine first information, where the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device, or the first information is used to configure at least one media access layer control unit MAC CE validity delay K-mac corresponding to the cell accessed by the terminal device, where the MAC CE validity delay K-mac is a round-trip propagation delay between a synchronization reference point and a network device, and the synchronization reference point is one of the positions on a transmission link between the terminal device and the network device; The first information is sent.

18. The method according to claim 17, characterized in that The first information is also used to configure the ephemeris information parameter set of the reference satellite among the multiple satellites corresponding to the cell accessed by the terminal device, and the orbital distances of other satellites except the reference satellite relative to the reference satellite.

19. The method according to claim 17, characterized in that The first information is also used to configure different ephemeris information parameter sets associated with different synchronization signal blocks SSB.

20. The method according to claim 17, characterized in that The first information is also used to configure different ephemeris information parameter sets associated with different synchronization signal block SSB groups.

21. The method according to claim 17, characterized in that The first information is also used to configure different ephemeris information parameter sets associated with different bandwidth parts BWP.

22. The method according to claim 17, characterized in that The method further comprises: Determine second information, where the second information is used to configure at least one common timing advance TA configuration parameter set corresponding to the cell accessed by the terminal device; The second information is sent.

23. The method according to claim 22, characterized in that The second information is also used to configure different common TA configuration parameter sets associated with different synchronization signal blocks SSB.

24. The method according to claim 22, characterized in that The second information is also used to configure different common TA configuration parameter sets associated with different synchronization signal block SSB groups.

25. The method according to claim 22, characterized in that The second information is also used to configure different common TA configuration parameter sets associated with different synchronization signal block SSB groups.

26. The method according to claim 17, characterized in that The first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal blocks SSB.

27. The method according to claim 17, characterized in that The first information is also used to configure different MAC CE effectiveness delays K-mac associated with different synchronization signal block SSB groups.

28. The method according to claim 17, characterized in that The first information is also used to configure different MAC CE effectiveness delays K-mac associated with different bandwidth parts BWP.

29. The method according to claim 17, characterized in that The method further comprises: receiving a timing advance TA value of uplink transmission, and a synchronization signal block SSB, an SSB group, a bandwidth part BWP or identification information associated with the TA value; different SSBs, SSB groups or identification information are associated with different satellites, or the terminal device is served by different satellites through different BWPs; Send the delay value K-offset used to determine the uplink data scheduling delay.

30. The method according to claim 17, characterized in that The method further comprises: Determine third information, where the third information is used to configure different delay values ​​K-offset associated with different bandwidth parts BWP; the delay value K-offset is used to determine the uplink data scheduling delay; The third information is sent.

31. A communication device, characterized in that: The device comprises: A communication unit, configured to receive first information; a determining unit, configured to determine, according to the first information, a first ephemeris information parameter set for time-frequency synchronization, wherein the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device; or The determination unit is used to determine, based on the first information, a media access layer control unit MAC CE effectiveness delay K-mac when the terminal device transmits data with the network device via different satellites; the first information is used to configure at least one MAC CE effectiveness delay K-mac corresponding to the cell accessed by the terminal device, the MAC CE effectiveness delay K-mac being the round-trip propagation delay between the synchronization reference point and the network device, and the synchronization reference point being one of the positions on the transmission link between the terminal device and the network device.

32. A communication device, characterized in that: The device comprises: A determination unit, configured to determine first information, wherein the first information is used to configure at least one ephemeris information parameter set corresponding to a cell accessed by the terminal device, or the first information is used to configure at least one media access layer control unit MAC CE validity delay K-mac corresponding to the cell accessed by the terminal device, wherein the MAC CE validity delay K-mac is a round-trip propagation delay between a synchronization reference point and a network device, and the synchronization reference point is one of the positions on a transmission link between the terminal device and the network device; A communication unit is used to send the first information.

33. A communication device, characterized in that: It includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to call the program instructions to execute the method according to any one of claims 1 to 16, or to execute the method according to any one of claims 17 to 30.

34. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the method according to any one of claims 1 to 16 is executed, or the method according to any one of claims 17 to 30 is executed.

35. A chip, characterized in that: The chip includes a processor, and the processor executes the method according to any one of claims 1 to 16, or executes the method according to any one of claims 17 to 30.

36. A chip module, characterized in that: The chip module includes a transceiver component and a chip, the chip includes a processor, and the processor executes the method according to any one of claims 1 to 16, or executes the method according to any one of claims 17 to 30.

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