Parameter determination method and related apparatus

Abstract

The application provides a parameter determination method and related devices, which are beneficial to satellites to obtain accurate TA for uplink data transmission. The method comprises the following steps: a satellite accesses a base station based on a first TA of the satellite; the base station verifies the satellite; after the satellite is verified, the base station sends first configuration information to the satellite, the first configuration information is used to indicate the position of the base station, or the first configuration information is used to indicate the TA variation law of the satellite; and the satellite determines a second TA of the satellite based on the first configuration information, and the second TA is used for uplink data transmission of the satellite.

Description

Parameter determination method and related device Technical Field

[0001] The present application relates to the field of communications, and in particular to a parameter determination method and related devices. Background Art

[0002] Non-terrestrial networks (NTN) offer wide coverage and flexible networking, enabling seamless global network coverage. NTN networks complement existing terrestrial networks and can also be considered an independent communications system providing users with global high-speed network access. NTN communications utilize drones, high-altitude platforms, satellites, and other equipment to build networks and provide data transmission, voice communication, and other services to user equipment (UE).

[0003] Integrated access and backhaul (IAB) is a network technology that supports wireless backhaul and relay links, enabling flexible and dense deployment of NR cells. In NTN networks (NTN-IAB) using IAB, satellites can access base stations as UEs for communication. However, satellites cannot obtain accurate timing advance (TA) for uplink data transmission.

[0004] Summary of the Invention

[0005] The present application provides a parameter determination method and related devices, which are helpful for satellites to obtain accurate TA for uplink data transmission.

[0006] In a first aspect, a parameter determination method is provided. The method can be executed by a satellite, or by a component of the satellite (e.g., a processor, chip, or chip system), or by a logic module or software capable of implementing all or part of the satellite's functions. The method includes: accessing a base station based on a first TA of the satellite; receiving first configuration information from the base station, the first configuration information being received after the base station has successfully verified the accessed satellite, the first configuration information being used to indicate the location of the base station, or the first configuration information being used to indicate a pattern of changes in the satellite's TA; and determining a second TA of the satellite based on the first configuration information, the second TA being used for uplink data transmission by the satellite.

[0007] The location of the base station refers to the exact location of the base station, and the location of the satellite refers to the exact location of the satellite. In this application, the satellite accesses the base station as a UE. For network management considerations, the network side does not want ordinary UEs to obtain the exact location of the base station. Therefore, the base station needs to verify the identity of the accessed satellite. After the verification is passed by the base station, the satellite can receive the first configuration information from the base station, which is conducive to meeting the network management requirements for the location of the base station.

[0008] When the first configuration information indicates the location of the base station, since the indicated location of the base station is accurate, the satellite can determine the accurate round-trip delay between the satellite and the base station based on the location of the base station and the location of the satellite, and then determine the accurate second TA of the satellite based on the accurate round-trip delay between the satellite and the base station, which is conducive to the satellite obtaining an accurate TA for uplink data transmission.

[0009] When the first configuration information indicates the TA change pattern of the satellite, since the base station can determine the satellite's motion trajectory based on the satellite's ephemeris information, and since the position of the base station is known to the base station, the base station can obtain the accurate TA change pattern of the satellite and send it to the satellite. Therefore, the satellite can obtain the accurate round-trip delay between the satellite and the base station based on the satellite's TA change pattern, and then determine the accurate second TA of the satellite based on the accurate round-trip delay between the satellite and the base station, which is conducive to the satellite obtaining accurate TA for uplink data transmission.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the first configuration information is used to indicate a location of the base station. Determining a second TA of the satellite based on the first configuration information includes: determining the second TA of the satellite based on the location of the base station and the location of the satellite.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the first configuration information is used to indicate a TA variation pattern of the satellite. Determining a second TA of the satellite based on the first configuration information includes: determining the second TA of the satellite based on the TA variation pattern of the satellite.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, before the satellite-based first TA accesses the base station, the method further includes:

[0013] Receive second configuration information from the base station; and determine a first TA of the satellite based on the second configuration information.

[0014] In the present application, the second configuration information is used to indicate the fuzzy position of the base station, or the second configuration information is used to indicate the changing pattern of the public TA, or the second configuration information is used to indicate the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the position of the base station.

[0015] Since the satellite does not obtain the exact location of the base station before accessing the base station, the satellite can determine the first TA for access based on the second configuration information. Since the accuracy of the first configuration information is higher than the accuracy of the second configuration information, the accuracy of the second TA is higher than the accuracy of the first TA.

[0016] In conjunction with the first aspect, in certain implementations of the first aspect, the second configuration information is used to indicate an ambiguous position of the base station, where the ambiguous position of the base station is determined based on the base station's position and a preset TA accuracy range. Determining the first TA of the satellite based on the second configuration information includes determining the first TA of the satellite based on the ambiguous position of the base station and the position of the satellite. This facilitates the satellite determining a TA that can be used to access the base station, thereby enabling uplink data transmission.

[0017] In combination with the first aspect, in certain implementations of the first aspect, the first configuration information is used to indicate the location of the base station, including: the first configuration information includes the coordinates of the location of the base station; or, the first configuration information includes the difference between the coordinates of the ambiguous location of the base station and the coordinates of the location of the base station.

[0018] In this application, when the first configuration information includes the coordinates of the base station's location, it helps reduce the computational complexity of the satellite. When the first configuration information includes the difference between the coordinates of the base station's ambiguous location and the coordinates of the base station's location, it helps further meet network management requirements for the base station's location.

[0019] In conjunction with the first aspect, in certain implementations of the first aspect, the second configuration information is used to indicate a change pattern of a common TA. Determining the first TA of the satellite based on the second configuration information includes: determining the first TA of the satellite based on the change pattern of the common TA. This facilitates the satellite determining a TA that can be used to access the base station, thereby enabling uplink data transmission.

[0020] In conjunction with the first aspect, in certain implementations of the first aspect, the second configuration information is further used to indicate a round-trip delay between the ambiguous position of the base station and the position of the base station. Determining a first TA of the satellite based on the ambiguous position of the base station and the position of the satellite includes: determining a round-trip delay between the satellite and the ambiguous position of the base station based on the ambiguous position of the base station and the position of the satellite; and determining the first TA of the satellite based on the round-trip delay between the satellite and the ambiguous position of the base station, and the round-trip delay between the ambiguous position of the base station and the position of the base station.

[0021] In the present application, the second configuration information can not only indicate the fuzzy position of the satellite, but also indicate the round-trip delay between the fuzzy position of the base station and the position of the base station. This is conducive to compensating for the delay error caused by the satellite's TA determined based on the fuzzy position of the satellite and the position of the satellite. This is conducive to improving the accuracy of the satellite's TA, and can expand the selection range of the fuzzy position of the base station, further meeting the network management requirements for the location of the base station.

[0022] In a second aspect, a parameter determination method is provided. The method can be executed by a base station, or by a component of the base station (e.g., a processor, chip, or chip system), or by a logic module or software capable of implementing all or part of the base station's functions. The method includes: verifying a satellite connected to the base station; and if the satellite is verified, sending first configuration information to the satellite, the first configuration information indicating the location of the base station or indicating a TA variation pattern of the satellite.

[0023] The location of the base station refers to the exact location of the base station, and the location of the satellite refers to the exact location of the satellite. In this application, the satellite accesses the base station as a UE. For network management considerations, the network side does not want ordinary UEs to obtain the exact location of the base station. Therefore, the base station needs to verify the identity of the accessed satellite. After the satellite is verified, the base station can send the first configuration information to the satellite, which is conducive to meeting the network management requirements for the location of the base station.

[0024] When the first configuration information indicates the location of the base station, since the indicated location of the base station is accurate, the satellite can determine the accurate round-trip delay between the satellite and the base station based on the location of the base station and the location of the satellite, and then determine the accurate second TA of the satellite based on the accurate round-trip delay between the satellite and the base station, which is conducive to the satellite obtaining an accurate TA for uplink data transmission.

[0025] When the first configuration information indicates the TA change pattern of the satellite, since the base station can determine the satellite's motion trajectory based on the satellite's ephemeris information, and since the position of the base station is known to the base station, the base station can obtain the accurate TA change pattern of the satellite and send it to the satellite. Therefore, the satellite can obtain the accurate round-trip delay between the satellite and the base station based on the satellite's TA change pattern, and then determine the accurate second TA of the satellite based on the accurate round-trip delay between the satellite and the base station, which is conducive to the satellite obtaining accurate TA for uplink data transmission.

[0026] In conjunction with the second aspect, in certain implementations of the second aspect, verifying a satellite connected to a base station includes verifying a device type of the satellite. Verifying that the satellite passes verification includes verifying that the satellite passes verification if the device type of the satellite is a network device.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the first configuration information is used to indicate the location of the base station, including: the first configuration information includes the coordinates of the exact position of the satellite; or, the first configuration information includes the difference between the coordinates of the fuzzy position of the base station and the coordinates of the location of the base station.

[0028] In this application, when the first configuration information includes the coordinates of the base station's location, it helps reduce the computational complexity of the satellite. When the first configuration information includes the difference between the coordinates of the base station's ambiguous location and the coordinates of the base station's location, it helps further meet network management requirements for the base station's location.

[0029] In combination with the second aspect, in certain implementations of the second aspect, the method further includes: sending second configuration information to the satellite, the second configuration information being used to indicate the fuzzy position of the base station, or the second configuration information being used to indicate the changing pattern of the public TA, or the second configuration information being used to indicate the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the position of the base station, the fuzzy position of the base station being determined based on the position of the base station and a preset TA accuracy range.

[0030] In conjunction with the second aspect, in certain implementations of the second aspect, the first configuration information is used to indicate a TA variation pattern of the satellite. Before sending the first configuration information to the satellite, the method further includes: obtaining ephemeris information of the satellite; and determining the TA variation pattern of the satellite based on the ephemeris information of the satellite and the position of the base station.

[0031] In a third aspect, a parameter determination device is provided, including: a module for executing the method in any possible implementation of any of the above aspects. Specifically, the device includes a module for executing the method in any possible implementation of any of the above aspects.

[0032] In one design, the device may include a module corresponding to each of the methods / operations / steps / actions described in any of the above aspects. The module may be a hardware circuit, software, or a combination of hardware circuit and software.

[0033] In another design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0034] In another design, the device is a satellite or a base station, which may include a transmitter for sending information or data and a receiver for receiving information or data.

[0035] In another design, the device is used to execute the method in any possible implementation of any of the above aspects, and the device can be configured in a satellite or a base station.

[0036] In a fourth aspect, a parameter determination device is provided, comprising a processor configured to call and run a computer program from a memory, so that the device executes the method in any possible implementation of any of the above aspects.

[0037] Optionally, the device further comprises a memory, which can be used to store instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the above aspects can be implemented.

[0038] Optionally, the device further includes: a transmitter (emitter) and a receiver (receiver), and the transmitter and the receiver can be separately provided or integrated together, and are referred to as a transceiver (transceiver).

[0039] In a fifth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any possible implementation of any of the above aspects.

[0040] In a sixth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions) which, when run on a computer, enables the computer to execute a method in any possible implementation of any of the above aspects.

[0041] In the seventh aspect, the present application provides a chip system, which includes at least one processor for supporting the implementation of the functions involved in any of the above aspects, such as receiving or processing the data involved in the above method.

[0042] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0043] Optionally, the chip system may consist of a chip, or may include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic diagram of an IAB network communication system;

[0045] FIG2 is a schematic diagram of an IAB architecture;

[0046] FIG3 is a schematic diagram of an NCR network communication system;

[0047] FIG4A and FIG4B are timing advance determination schemes adopted in the NR-NTN standard;

[0048] FIG5 is a schematic diagram of a satellite communication scenario;

[0049] FIG6 is a schematic diagram of a satellite communication scenario applicable to an embodiment of the present application;

[0050] FIG7 is a schematic diagram of an air-to-ground communication scenario applicable to an embodiment of the present application;

[0051] 8 and 9 are schematic flow charts of a parameter determination method provided in an embodiment of the present application;

[0052] FIG10 is a schematic diagram of an ambiguous position of a base station in an IAB communication scenario provided by an embodiment of the present application;

[0053] FIG11 is a schematic diagram of the accurate location of a base station in an IAB communication scenario provided by an embodiment of the present application;

[0054] 12 to 16 are schematic flow charts of parameter determination methods provided in embodiments of the present application;

[0055] FIG17 is a schematic diagram of another ambiguous position of a base station in an IAB communication scenario provided by an embodiment of the present application;

[0056] 18 to 20 are schematic block diagrams of a parameter determination device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The technical solution in this application will be described below with reference to the accompanying drawings.

[0058] Before introducing the parameter determination method and related devices provided in the embodiments of the present application, the following points are explained.

[0059] First, in the embodiments described below, various terms and abbreviations, such as configuration information, TA, and ambiguous location of a base station, are provided for ease of description and should not constitute any limitations on this application. This application does not exclude the possibility of defining other terms in existing or future protocols that can achieve the same or similar functions.

[0060] Second, the first, second, and various numerical numbers in the embodiments shown below are merely distinctions for ease of description and are not intended to limit the scope of the embodiments of the present application. For example, to distinguish different configuration information, etc.

[0061] Third, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

[0062] The following is an introduction to the prior art involved in this application.

[0063] Currently, New Radio (NR) technology is evolving from Release 18 to Release 19. NR technology has also moved from standardization to commercial deployment. The original intention of the NR standard protocol was to design wireless communication technologies for terrestrial cellular network scenarios, providing users with wireless communication services with ultra-low latency, ultra-reliability, ultra-high speeds, and a high number of connections. However, cellular networks cannot achieve seamless global coverage. For example, in areas without terrestrial base stations, such as ocean surfaces, polar regions, and rainforests, voice and data services cannot be provided in these areas without cellular network coverage.

[0064] Compared to terrestrial communications, NTN communications boasts a wider coverage area and flexible networking, enabling seamless global network coverage. The NTN network not only complements existing terrestrial networks but can also be considered an independent communications system providing users with global high-speed network access. Currently, research institutes, communications organizations, and telecommunications companies worldwide are participating in the research and development of NTN communication technologies and standards, striving to build a unified network for space, air, and ground communications.

[0065] NTN communications utilize equipment such as drones, high-altitude platforms, and satellites to form networks and provide user equipment (UEs) with services such as data transmission and voice communication. High-altitude platform equipment typically operates at altitudes between 8 and 50 km above the ground. Satellite communication systems can be categorized into three types based on the satellite's orbital altitude: geostationary Earth orbit (GEO) satellite communication systems (also known as synchronous orbit satellite systems), medium Earth orbit (MEO) satellite communication systems, and low Earth orbit (LEO) satellite communication systems.

[0066] GEO satellites orbit at an altitude of 35,786 km. Their main advantages are their ability to remain stationary relative to the Earth and provide a wide coverage area. However, GEO satellite communications also have significant disadvantages: 1) GEO satellite orbits are far from the Earth, resulting in high free-space propagation losses, which constrains communication link budgets. To increase transmit / receive gain, satellites must be equipped with larger antennas. 2) Communication transmission latency is high, reaching a round-trip delay of approximately 500 milliseconds, which cannot meet the needs of low-latency services. 3) GEO orbital resources are relatively scarce, launch costs are high, and coverage of the Earth's polar regions is inadequate.

[0067] MEO satellites orbit at altitudes between 2,000 and 35,786 km. Their advantage is that they can achieve global coverage with a relatively small number of satellites. However, their orbital altitude is higher than that of LEO satellites, and transmission latency is still greater than that of LEO satellite communications. Considering the advantages and disadvantages of MEO satellite communications, MEO satellites are primarily used for positioning and navigation.

[0068] LEO satellites operate at orbital altitudes between 300 and 2000 km. LEO satellites are lower than MEO and GEO orbits and offer advantages such as reduced data transmission latency, minimal transmission loss, and low launch costs. Consequently, LEO satellite communications have garnered increasing attention in recent years.

[0069] IAB network technology aims to support wireless backhaul and relay links, enabling flexible and ultra-dense deployment of NR cells without the need to proportionally intensify wired transmission networks. Key application scenarios include, but are not limited to, high fiber deployment costs, site densification, street coverage extension and coverage gap filling, and indoor coverage extension and coverage gap filling.

[0070] Figure 1 is a schematic diagram of an IAB network communication system. The communication system includes a UE, an IAB node, and an IAB donor. The IAB donor may also be referred to as a donor base station. In this application, the term "IAB network" is merely an example and may be replaced by a "wireless backhaul network" or a "relay network." The term "IAB node" is also merely an example and may be replaced by a "wireless backhaul device," a "wireless backhaul node," or a "relay node."

[0071] As shown in Figure 1, the parent node of IAB node 1 includes the IAB host. IAB node 1 is also the parent node of IAB node 2 or IAB node 3. UE 1's parent node includes IAB node 4. The child nodes of IAB node 4 include UE 1 or UE 2. An IAB node directly accessed by a terminal is referred to as an access IAB node. In Figure 1, IAB node 4 is the access IAB node for UE 1 and UE 2. IAB node 5 is the access IAB node for UE 2.

[0072] Nodes on the upstream transmission path from an IAB node to an IAB host are referred to as upstream nodes of the IAB node. Upstream nodes may include parent nodes, parent nodes of parent nodes (or grandparent nodes), and so on. For example, IAB node 1 and IAB node 2 in Figure 1 can be referred to as upstream nodes of IAB node 5.

[0073] A node on the downlink transmission path from an IAB node to a terminal can be referred to as a downstream node or descendant node of the IAB node. Downstream nodes or descendant nodes can include child nodes, child nodes of child nodes (or grandchild nodes), or terminals, etc. For example, UE 1, UE 2, IAB node 2, IAB node 3, IAB node 4, or IAB node 5 in Figure 1 can be referred to as downstream nodes or descendant nodes of IAB node 1. For another example, IAB node 4 and IAB node 5 in Figure 1 can be referred to as downstream nodes or descendant nodes of IAB node 2. UE 1 in Figure 1 can be referred to as a downstream node or descendant node of IAB node 4.

[0074] Uplink data packets sent by a terminal to an IAB host can be transmitted to the IAB host via one or more IAB nodes. This means that the destination node for uplink data between a terminal and an IAB host can be the IAB host. Downlink data packets sent by an IAB host to a terminal can be sent to the terminal's access IAB node via one or more IAB nodes, and then sent from the access IAB node to the terminal. This means that the destination node for downlink data between a terminal and an IAB host can be the access IAB node.

[0075] For example, there are two available paths for data transmission between UE 1 and the IAB host: Path 1: UE 1 ←→ IAB Node 4 ←→ IAB Node 3 ←→ IAB Node 1 ←→ IAB host. Path 2: UE 1 ←→ IAB Node 4 ←→ IAB Node 2 ←→ IAB Node 1 ←→ IAB host. There are three available paths for data transmission between UE 2 and the IAB host: Path 1: UE 2 ←→ IAB Node 4 ←→ IAB Node 3 ←→ IAB Node 1 ←→ IAB host. Path 2: UE 2 ←→ IAB Node 4 ←→ IAB Node 2 ←→ IAB Node 1 ←→ IAB host. Path 3: UE 2 ←→ IAB Node 5 ←→ IAB Node 2 ←→ IAB Node 1 ←→ IAB host.

[0076] It is understood that in the IAB network, a transmission path between a terminal and an IAB host may include one or more IAB nodes. In addition, a terminal may also directly access the IAB host, for example, UE 3 directly accesses the IAB host.

[0077] Each IAB node needs to maintain a backhaul link (BL) to its parent node. If the child node of an IAB node is a terminal, the IAB node also needs to maintain an access link (AL) with the terminal. As shown in Figure 1, the link between IAB node 4 and UE 1 or UE 2 includes the AL. The link between IAB node 4 and IAB node 2 or IAB node 3 includes the BL.

[0078] Figure 2 is a schematic diagram of the IAB architecture. Figure 2 takes the IAB architecture in the NR network as an example to introduce the next generation radio access network (NG-RAN), where the next generation radio access network (NG-RAN) includes a base station, an IAB host, and at least one IAB node.

[0079] As shown in Figure 2, the IAB node includes a distributed unit (DU) functional part and a mobile terminal (MT) functional part. The MT functional part of the IAB node can be called IAB-node-MT (or IAB-MT), and the DU functional part of the IAB node can be called IAB-node-DU (or IAB-DU). The IAB host can be a base station (e.g., gNodeB) that supports IAB additional functions and is connected to the core network via a non-IAB (e.g., optical fiber). The IAB host can include a central unit (CU) functional part and at least one DU functional part. The CU functional part of the IAB host can be called IAB-donor-CU, and the DU functional part of the IAB host can be called IAB-donor-DU.

[0080] A CU is a logical node that carries the radio resource control (RRC), service data adaptation protocol (SDAP), and packet data convergence protocol (PDCP) of a base station (e.g., gNodeB), and is used to carry the operations of one or more DUs.

[0081] The DU is a logical node that carries the radio link control (RLC), medium access control (MAC), and physical (PHY) layers of a base station (eg, gNodeB).

[0082] The CU and its controlled DUs are connected via the F1 interface. The F1 Application Protocol (F1AP) is used to transfer radio bearer configuration information between the CU and DU, and to establish a General Packet Radio Service (GPRS) tunnel between the DU and CU for each radio bearer.

[0083] The IAB-node-MT, acting as a normal UE, connects to the DU of its parent node or the DU of the IAB host as a wireless transmission backhaul link. The IAB-node-DU provides blind spot coverage for the pole station cell on the access side of the IAB node, providing access for normal UEs or lower-level IAB-node-MTs. When accessing the IAB network, the IAB node can act as a terminal. In this case, the MT of the IAB node has a terminal protocol stack. An air interface (Uu interface) protocol stack exists between the IAB node and the IAB host.

[0084] The IAB host and the base station are connected through the Xn-C interface, the base station and the fifth-generation mobile communication technology (5G) core network are connected through the NG interface, and the IAB-donor-CU and the 5G core network are connected through the NG interface.

[0085] The communication interface between the IAB host and the IAB node can include an air interface (Uu interface) and an F1 interface. For example, an air interface (Uu interface) exists between the MT of an IAB node and the IAB host, and an F1 interface exists between the DU of an IAB node and the IAB host. IAB supports wireless backhaul between base stations, which is achieved through the Uu interface.

[0086] It should be noted that an IAB node may have one or more roles within an IAB network. For example, an IAB node can function as a terminal, an access node, or an intermediate IAB node. IAB nodes can use protocol stacks corresponding to different roles. When an IAB node has multiple roles within an IAB network, it can simultaneously have multiple protocol stacks, each of which can share some common protocol layers, such as the RLC layer, MAC layer, and PHY layer.

[0087] IAB network technology is designed for terrestrial data transmission. In satellite communication scenarios, inaccurate timing advance (TA) may occur when a satellite (acting as an IAB node) accesses a base station to establish a Uu port connection, preventing the IAB node from successfully accessing the base station.

[0088] Network controlled repeaters (NCRs) are a type of network equipment similar to IAB nodes, and can be used as devices to amplify and forward base station signals when a UE accesses a base station (parent node).

[0089] Figure 3 is a schematic diagram of an NCR network communication system. The communication system includes a UE, a base station (e.g., a gNodeB), and an NCR. The NCR includes a MT (NCR-MT) function and a forwarding function (NCR-forwarding, or NCR-fwd). The NCR-MT receives control information (side information) from the base station via a control link (Uu port). This control information is used to control the behavior of the NCR-fwd. This control information includes beam direction indication, forwarding on / off, and power control.

[0090] NCR technology is designed for terrestrial data transmission. In satellite communication scenarios, the TA may be inaccurate when the satellite (as NCR) accesses the base station to establish a Uu port connection, making it impossible for the NCR to successfully access the base station.

[0091] Figures 4A and 4B are timing advance determination schemes adopted in the NR-NTN (NR and NTN integrated network) standard. Depending on whether it has global navigation satellite system (GNSS) capability, UE can be divided into UE with GNSS capability and UE without GNSS capability. UE without GNSS capability cannot evaluate the propagation delay between the UE and the satellite. For UE with GNSS capability, since the UE knows its own position and the satellite's ephemeris information, it can automatically evaluate the TA between the UE and the satellite before performing physical random access channel (PRACH) transmission. Depending on the link compensated by the UE, there are two optional schemes: Scheme 1, the UE compensates for the delay of the service link and the feeder link; Scheme 2, the UE only compensates for the delay of the service link.

[0092] The above two solutions each have advantages and disadvantages, so a compromise solution is considered, namely defining an uplink time synchronization reference point (hereinafter referred to as the reference point), and having the base station specify the value of the UE's delay compensation. If the reference point is at the NTN gateway, as shown in Figure 4A, the reference point is located at the NTN gateway (the NTN gateway is located together with the base station or is located close to it), and the UE compensates for all delays, including the service link and the feeder link. The downlink and uplink frames are aligned at the base station. If the reference point is at the satellite, the UE only compensates for the service link delay. If the reference point is at a point between the satellite and the NTN gateway, as shown in Figure 4B, the reference point is located between the satellite and the NTN gateway (the NTN gateway is located together with the base station or is located close to it), the UE compensates for the service link and part of the feeder link delay, and the downlink and uplink frames are not aligned at the base station.

[0093] After the reference point is introduced, the base station needs to provide the UE with a common TA. The main function of the common TA is to compensate for the propagation delay between the reference point and the satellite. In Figure 4A or Figure 4B, the base station / satellite broadcasts ephemeris information, the common TA, the common TA drift rate, the common TA drift rate, and the TA offset to the UE.

[0094] UE calculates T based on its own location and the following formula TA , T TA Used to send a random access preamble and subsequently send uplink data.

[0095] Among them, N TA Indicates TA adjustment amount (closed loop indication), N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. For example, it is related to the transition time between uplink reception and downlink transmission in TDD mode. It represents the round-trip delay between the satellite and the reference point, which can be determined based on the public TA configured by the base station, the rate of change of the public TA, and the rate of change of the rate of change of the public TA. Indicates the round-trip delay between UE and satellite.

[0096] In the satellite communication scenario shown in Figure 5, the satellite communicates with the base station as an IAB node. This application may refer to an NTN network using IAB technology as an NTN-IAB network. The satellite communication scenario shown in Figure 5 includes IAB Node 1, IAB Node 2, IAB Node 3, and a base station. When a satellite, acting as a UE, requests access to the base station, it cannot accurately determine the round-trip delay between the satellite and the base station because it does not know the location of the base station. Consequently, the satellite may be unable to obtain an accurate TA for uplink data transmission.

[0097] In addition, if the distance between satellites is large (e.g., multiple layers of satellites), the base station's broadcast of a public TA to the UE cannot support simultaneous access by satellites with significantly different latency. For example, in Figure 5, IAB node 1 is far from the base station, and the round-trip latency between the base station and the base station is large. Therefore, the public TA may not support IAB node 1 accessing the base station. IAB node 2 is closer to the base station, and the round-trip latency between the base station and the base station is small. Therefore, the public TA can support IAB node 2 accessing the base station. Even if broadcasting a public TA can support simultaneous access to the base station by satellites that are relatively close to each other, the public TA and its rate of change cannot accurately reflect the TA changes in the backhaul link. Therefore, after access, the base station needs to frequently close the loop to indicate the TA adjustment amount.

[0098] In the NR-NTN scenario, the base station / satellite can send ephemeris information and a common TA to the UE. The ephemeris information here indicates the position information of the satellite serving the UE over a period of time.

[0099] In the NTN-IAB scenario shown in Figure 5, the base station can send ephemeris information and a public TA to the satellite (acting as an IAB node). The ephemeris information here indicates the position of the satellite accessing the base station, or the position of the base station. The base station's location indicated by the ephemeris information is an ambiguous location. Even if the satellite knows either its own position or the base station's position, it cannot calculate the round-trip delay between the satellite and the base station. After the satellite accesses the base station, the base station needs to frequently provide closed-loop instructions for TA adjustments, resulting in high signaling overhead.

[0100] It should be noted that the precise location broadcast by a base station does not meet network management requirements. Therefore, the location of the base station indicated in the ephemeris information broadcast by the base station is the base station's ambiguous location. The precise location of a base station can also be described as the base station's true location. The ambiguous location of a base station is a description relative to the precise location of the base station, and there is a deviation between the ambiguous location of the base station and the precise location of the base station.

[0101] As described above, in the NTN-IAB scenario shown in Figure 5, a satellite (acting as an IAB node) can access a base station as a UE for communication. However, the satellite cannot obtain an accurate TA for uplink data transmission. Similarly, in NTN communication scenarios using NCR technology, the satellite (acting as an NCR) also faces the problem of being unable to obtain an accurate TA for uplink data transmission.

[0102] In view of this, an embodiment of the present application provides a parameter determination method. After the satellite accesses the base station, the base station can verify the satellite and send first configuration information to the satellite after the verification is successful. The first configuration information is used by the satellite to determine the accurate TA for uplink data transmission. The parameter determination method of the present application not only facilitates the satellite to obtain an accurate TA for data transmission, but also meets network management requirements for the location of the base station.

[0103] FIG6 is a schematic diagram of a satellite communication scenario applicable to an embodiment of the present application. As shown in FIG6 , the network equipment in the satellite communication scenario includes a satellite, a gateway station / signal gateway station (NTN gateway) and a base station. The user terminal includes an Internet of Things terminal, and can also be a terminal of other forms and performances, such as a mobile phone terminal, a high-altitude aircraft, etc., which are not limited here. The link between the satellite and the user terminal is called a service link, and the link between the satellite and the gateway station / signal gateway station is called a feeder link. In addition, the base station is connected to the core network. The technical solution of the present application can also be applied to a multi-satellite communication scenario that is an extension of the scenario shown in FIG6 .

[0104] Satellites can be divided into transparent and regenerative modes based on their operating modes. When operating in transparent mode, the satellite performs intermediate forwarding functions, and the gateway / signaling station performs base station functions or partial base station functions. In this case, the gateway / signaling station can be considered a base station. Alternatively, the base station can be deployed separately from the gateway / signaling station. In this case, the feeder link latency includes both the delay between the satellite and the gateway / signaling station and the delay between the gateway / signaling station and the base station. When operating in regenerative mode, the satellite has data processing capabilities and performs base station functions or partial base station functions. In this case, the satellite can be considered a base station.

[0105] This embodiment of the application uses the case where the satellite's transparent transmission mode is used with the gateway / signaling station and the base station located together or close to each other as an example. In this case, the feeder link delay can be approximated as the delay between the satellite and the gateway / signaling station. If the gateway / signaling station is far away from the base station, the feeder link delay is calculated by adding the delay between the satellite and the gateway / signaling station and the delay between the gateway / signaling station and the base station.

[0106] The embodiment of the present application is also applicable to the air-to-ground communication scenario shown in Figure 7. As shown in Figure 7, the network equipment in the air-to-ground communication scenario includes a base station, and the user terminal includes a high-altitude aircraft, an onboard handheld terminal, etc.

[0107] In the embodiment of the present application, the satellite serving as an IAB node or NCR may be regarded as a user terminal in a satellite communication scenario as shown in FIG6 , or a user terminal in an air-to-ground communication scenario as shown in FIG7 .

[0108] Figure 8 is a schematic flow chart of a parameter determination method 800 provided in an embodiment of the present application. The steps of method 800 can be interactively executed by a satellite and a base station. The satellite, acting as an IAB node or NCR, can access the base station as a user terminal. Method 800 includes S801 to S804, and the specific steps are as follows:

[0109] S801: A satellite accesses a base station based on a first TA.

[0110] Satellites can access base stations through a random access process. The first step in random access involves the satellite sending a random access preamble to the base station. To ensure that uplink data from the satellite reaches the base station within the desired time window and achieve uplink timing synchronization with the base station, the satellite must send the data packet in advance of the time it sends the uplink data to the base station. This advance time is called the TA.

[0111] In the embodiment of the present application, the satellite's TA indicates the time in advance that the satellite needs to send a data packet when sending uplink data to the base station. This time includes the round-trip delay between the satellite and the base station. When the satellite knows its own position and the exact position of the base station, the satellite can determine the exact round-trip delay between the satellite and the base station, and thus the accurate satellite TA. When the satellite does not know the location of the base station, or only knows the fuzzy position of the base station, the satellite cannot determine the exact round-trip delay between the satellite and the base station, and the obtained satellite TA is inaccurate.

[0112] The satellite TA involved in the embodiments of this application includes a first TA and a second TA. The first TA is the initial TA used by the satellite to access a base station and can be used to send a random access preamble for random access. The second TA is the updated TA after the satellite accesses the base station. The updated second TA of the satellite is more accurate than the first TA of the satellite.

[0113] When a satellite initially accesses a base station, the satellite does not obtain the position of the base station, or obtains an ambiguous position of the base station. Therefore, the first TA of the satellite is inaccurate.

[0114] It should be noted that the location of a base station in the embodiments of the present application refers to the exact location of the base station, which can also be described as the true location of the base station. When a satellite accesses a base station as a UE, for network management reasons, the base station does not broadcast its exact location to the satellite. Instead, it broadcasts its fuzzy location to the satellite. The fuzzy location of a base station is a location that is different from the exact location of the base station. In other words, there is a deviation between the fuzzy location of the base station and the exact location of the base station.

[0115] S802: The base station verifies the satellite connected to the base station.

[0116] After the satellite accesses the base station, the base station can verify the accessed satellite.

[0117] Optionally, S802 specifically includes:

[0118] The type of equipment used by the base station to acquire satellites;

[0119] The base station verifies the satellite's equipment type.

[0120] The following takes the four-step random access process as an example to describe the process of the base station obtaining the device type of the satellite.

[0121] In one possible implementation, after the satellite receives message 4 sent by the base station, the base station may send a first request message to the satellite, where the first request message is used to request the satellite's device type. After receiving the first request message, the satellite sends a first response message to the base station, where the first response message is used to indicate the satellite's device type.

[0122] In another possible implementation, the base station may carry the second request message in message 2 or message 4 in the random access process and send it to the satellite, where the second request message is used to request the device type of the satellite.

[0123] In yet another possible implementation, the satellite may send the device type to the base station by carrying it in message 1 or message 3 during the random access process without a request from the base station.

[0124] After obtaining the device type of the satellite, the base station can verify it. If the device type of the satellite is a network device, the base station verifies the satellite successfully and executes S803 and subsequent operations. If the device type of the satellite is not a network device (an error in reporting the device type may occur), the base station fails to verify the satellite. In this case, the base station can instruct the satellite to continue using the first TA for uplink data transmission; or, the base station sends information for updating the TA to the satellite, but the information for updating the TA does not involve the exact location of the base station (such as the second configuration information below), so as to meet the network management requirements for the accurate location of the base station.

[0125] S803: If the satellite verification is successful, the base station sends first configuration information to the satellite. The first configuration information is used to indicate the location of the base station, or the first configuration information is used to indicate a change pattern of the timing advance (TA) of the satellite. In response, the satellite receives the first configuration information.

[0126] After verifying the satellite and confirming that the connected satellite is not an ordinary UE but a network device, the base station sends first configuration information to the satellite. The base station location in the first configuration information refers to the exact location of the base station. The satellite's TA change pattern indicates the change pattern of the satellite's TA during movement, which can also be called a UE-level change pattern. This may include UE-level TA (TA_UE), TA change rate (TA_rate), and the rate of change of the TA change rate (TA_rate_rate).

[0127] The base station can determine the motion trajectory of the satellite based on the satellite's ephemeris information, and the base station's position is known to the base station. Therefore, the base station can determine the satellite's TA change pattern based on the base station's position and the satellite's ephemeris information.

[0128] It should be understood that when the first configuration information is used to indicate the location of a base station, the satellite can determine the accurate round-trip delay between the satellite and the base station based on the location of the base station. Alternatively, when the first configuration information is used to indicate the satellite's TA variation pattern, since the satellite's TA variation pattern is determined based on the satellite's ephemeris information and is more targeted to each satellite, the satellite can determine the accurate round-trip delay between the satellite and the base station based on the satellite's TA variation pattern.

[0129] Optionally, before S801, the method 800 further includes: the base station sends second configuration information to the satellite; and the satellite determines a first TA of the satellite based on the second configuration information.

[0130] In which, the second configuration information is used to indicate the fuzzy position of the base station, or the second configuration information is used to indicate the changing pattern of the public TA, or the second configuration information is used to indicate the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the position of the base station, and the fuzzy position of the base station is determined based on the position of the base station and the preset TA accuracy range.

[0131] In an embodiment of the present application, before accessing the base station, the satellite may receive second configuration information from the base station, determine a first TA based on the second configuration information, and access the base station using the first TA.

[0132] When the second configuration information is used to indicate the ambiguous position of the base station, the satellite cannot accurately determine the round-trip delay between the satellite and the base station based on the ambiguous position of the base station, so the first TA of the satellite obtained is inaccurate. Alternatively, when the second configuration information is used to indicate the variation pattern of the common TA, since the variation pattern of the common TA is the variation pattern of the TA of the reference point selected by the base station, it cannot accurately describe the variation pattern of the TA of each satellite. Therefore, the satellite cannot accurately determine the round-trip delay between the satellite and the base station based on the variation pattern of the common TA, so the first TA of the satellite obtained is inaccurate. Alternatively, when the second configuration information is used to indicate the ambiguous position of the base station and the round-trip delay between the ambiguous position of the base station and the position of the base station, although the round-trip delay between the ambiguous position of the base station and the position of the base station can compensate for part of the delay error, the sum of the round-trip delay between the satellite and the ambiguous position of the base station and the round-trip delay between the ambiguous position of the base station and the base station can still not accurately determine the round-trip delay between the satellite and the base station, so the first TA of the satellite obtained is inaccurate.

[0133] The specific process of the satellite determining the first TA of the satellite based on the second configuration information can be found in the description of Figures 9 to 17 below, which will not be described in detail here.

[0134] S804: The satellite determines a second TA of the satellite based on the first configuration information. The second TA is used for uplink data transmission by the satellite.

[0135] In an embodiment of the present application, when the satellite is unaware of the location (accurate location) of the base station, it can use a first TA to initially access the base station. After accessing the base station, the base station sends first configuration information to the satellite if the satellite is successfully verified. This helps the satellite determine the accurate TA for uplink data transmission while meeting the network management requirements for the location of the base station on the network side, thereby increasing the probability of the base station receiving the satellite's uplink data within the cyclic prefix (CP) range, thereby improving the channel coding and decoding efficiency of the base station.

[0136] The specific process of the satellite determining the second TA of the satellite based on the first configuration information can be found in the description of Figures 9 to 17 below, which will not be described in detail here.

[0137] The accurate location of the base station in the embodiments of the present application can also be understood as the location information of the base station that can provide a more accurate TA than the ambiguous location information. Or it means that the distance difference between the accurate location and the base station is smaller than the distance difference between the ambiguous location and the base station.

[0138] 9 to 17 , a process in which the satellite determines the first TA according to the second configuration information and determines the second TA according to the first configuration information will be described in detail.

[0139] Figure 9 is a schematic flow chart of another parameter determination method 900 provided in an embodiment of the present application. Method 900 describes a specific implementation of determining a satellite's second TA using the first configuration information in method 800 indicating the location of a base station, and determining a satellite's first TA using the second configuration information in method 800 indicating the ambiguous location of the base station. The location of the base station refers to the precise location of the base station.

[0140] Method 900 includes S901 to S906, and the specific steps are as follows:

[0141] S901: A base station sends an ambiguous position of the base station to a satellite, and the satellite receives the ambiguous position of the base station accordingly.

[0142] The base station sends the fuzzy position of the base station to the satellite, including: the base station broadcasts the fuzzy position of the base station. Since the base station broadcasts the fuzzy position of the base station, it meets the network management requirements of the network side for the position of the base station. Figure 10 is a schematic diagram of the fuzzy position of the base station in an IAB communication scenario provided by an embodiment of the present application. The IAB communication scenario shown in Figure 10 includes IAB node 1, IAB node 2 and a base station. It can be seen from Figure 10 that the fuzzy position of the base station is not the same as the position of the base station. After receiving the fuzzy position of the base station broadcast by the base station, the satellite can determine its own TA to the base station based on its own position and the fuzzy position of the base station.

[0143] S902: The satellite determines a first TA of the satellite based on the ambiguous position of the base station and the position of the satellite.

[0144] The satellite position refers to the exact location of the satellite. The satellite can determine the satellite position based on the ephemeris information.

[0145] Exemplarily, the position of the satellite and the fuzzy position of the base station are expressed in the form of (x, y, z) coordinates. The base station sends the fuzzy position of the base station to the satellite in the form of (x, y, z) coordinates.

[0146] In this step, the satellite can determine the round-trip delay between the satellite and the base station based on the fuzzy position of the base station and the position of the satellite, which is recorded as Furthermore, the satellite can determine the first TA of the satellite according to the following formula, denoted as T TA,1 :

[0147] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite The value of the parameter. TA The value of N TA,offset The value of can be configured by the base station.

[0148] It should be understood that the round-trip delay between the satellite and the base station determined here is In fact, it is the round-trip delay between the fuzzy position of the satellite and the base station, rather than the round-trip delay between the accurate position of the satellite and the base station. Therefore, the T obtained based on the above formula is TA,1 Inaccurate.

[0149] S903: The satellite accesses the base station based on the first TA.

[0150] The satellite sends a random access preamble and other data to the base station in advance of the time corresponding to the first TA for random access. After receiving the random access preamble from the satellite, the base station establishes a basic signaling connection with the satellite to complete the random access.

[0151] S904: The base station verifies the connected satellite.

[0152] Alternatively, the satellite may be verified on the radio access network (RAN) side or the core network of the base station, for example, by the operations, administration, or maintenance (OAM) function of the RAN side of the base station. Alternatively, the satellite may be verified by the access and mobility management function (AMF) of the core network, and the core network may send the verification result to the base station.

[0153] Optionally, the base station may verify the device type of the satellite. For details, please refer to the description of S802 and will not be repeated here.

[0154] At step S905, after successfully verifying the satellite, the base station transmits its accurate location to the satellite. The satellite then receives the accurate location of the base station. The accurate location of a base station can also be understood as providing more accurate location information than ambiguous location information. Alternatively, it means that the distance difference between the accurate location and the base station is smaller than the distance difference between the ambiguous location and the base station.

[0155] Optionally, the base station may send the exact location of the base station to the satellite after verifying that the satellite is a network device.

[0156] S906: The satellite determines a second TA of the satellite based on the accurate position of the base station and the position of the satellite.

[0157] The position of a satellite refers to the exact position of the satellite. The satellite can determine the position of the satellite based on the ephemeris information. Figure 11 is a schematic diagram of the exact position of a base station in an IAB communication scenario provided by an embodiment of the present application. The IAB communication scenario shown in Figure 11 includes IAB node 1, IAB node 2, and a base station. When the base station sends the exact position of the base station to the satellite, the satellite can determine the exact round-trip delay between the satellite and the base station based on the exact position of the base station and the position of the satellite, and then determine the second TA of the satellite. The second TA obtained in this way is more accurate than the first TA.

[0158] Similar to the satellite determining the first TA in S902, the satellite first determines the round-trip delay between the satellite and the base station based on the accurate position of the base station and the position of the satellite, which is recorded as Furthermore, the satellite can determine the second TA of the satellite according to the following formula, recorded as T TA,2 :

[0159] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite N TA The value of N TA,offset The value of can be configured by the base station.

[0160] It should be understood that due to It is determined based on the accurate location of the base station and the location of the satellite. It indicates the round-trip delay between the exact position of the satellite and the base station, so T obtained based on the above formula TA,2 Is a T TA,1 More accurate TA value.

[0161] Optionally, the fuzzy position of the base station can be determined based on the accurate position of the base station and a preset TA accuracy range. For example, the base station first selects a fuzzy position, and then the base station calculates a TA based on the fuzzy position of the base station and the position of the satellite. At the same time, the base station calculates a TA based on the accurate position of the base station and the position of the satellite. The base station compares the difference between the two TAs. If the difference between the two TAs is within the preset TA accuracy range, for example, the difference between the two TAs is less than a preset threshold, the base station can send the fuzzy position to the satellite. This helps to reduce the error between the first TA determined based on the fuzzy position of the satellite and the accurate TA used by the satellite for uplink data transmission. The base station can receive ephemeris information from the satellite, determine the position of the satellite based on the ephemeris information of the satellite, or select different possible satellite positions within the coverage area of ​​the base station for calculation and verification.

[0162] In this embodiment of the present application, the base station sends the satellite its fuzzy location before verifying the satellite, satisfying the network management requirements for the base station's location. After the base station verifies the connected satellite, it can send the satellite its exact location, which helps the satellite determine a more accurate TA for uplink data transmission.

[0163] Figure 12 is a schematic flow chart of another parameter determination method 1200 provided in an embodiment of the present application. Method 1200 describes a specific implementation of determining a satellite's second TA using the position difference between the base station's position indicated by the first configuration information in method 800 and the base station's ambiguous position, and determining the satellite's first TA using the base station's ambiguous position indicated by the second configuration information in method 800. The base station's position refers to the base station's accurate position.

[0164] The method 1200 includes S1201 to S1206, and the specific steps are as follows:

[0165] S1201: A base station sends an ambiguous position of the base station to a satellite, and the satellite receives the ambiguous position of the base station accordingly.

[0166] S1202: The satellite determines a first TA of the satellite based on the ambiguous position of the base station and the position of the satellite.

[0167] In this step, the satellite can determine the round-trip delay between the satellite and the base station based on the fuzzy position of the base station and the position of the satellite, which is recorded as Furthermore, the satellite can determine the first TA of the satellite according to the following formula, denoted as T TA,1 :

[0168] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Indicates the round-trip delay between a network device and a reference point. Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite N TA The value of N TA,offset The value of can be configured by the base station.

[0169] S1203: The satellite accesses the base station based on the first TA.

[0170] S1204: The base station verifies the connected satellite.

[0171] S1201 to S1204 are similar to the description of S901 to S904 above, and will not be repeated here.

[0172] S1205: After verifying the satellite, the base station sends position difference information to the satellite, where the position difference information indicates the position difference between the accurate position of the base station and the ambiguous position of the base station. In response, the satellite receives the position difference information.

[0173] Optionally, the position difference information further indicates a direction parameter of the position difference. For example, when the direction parameter of the position difference is "0", the coordinates of the position difference = the coordinates of the accurate position of the base station - the coordinates of the ambiguous position of the base station. When the direction parameter of the position difference is "1", the coordinates of the position difference = the coordinates of the ambiguous position of the base station - the coordinates of the accurate position of the base station.

[0174] Optionally, the default direction parameter of the position difference is agreed to be "0" or "1" through a protocol, that is, when the direction parameter of the position difference is not sent, the default parameter is used.

[0175] For example, the coordinates of the accurate position of the base station are (x0, y0, z0), and the coordinates of the fuzzy position of the base station are (x1, y1, z1). The position difference is expressed in the form of coordinates as (△x, △y, △z). When the direction parameter of the position difference is "0", △x = x0-x1, △y = y0-y1, △z = z0-z1; when the direction parameter of the position difference is "1", △x = x1-x0, △y = y1-y0, △z = z1-z0.

[0176] Optionally, the direction parameters of the position difference may not be indicated in the position difference information. The satellite and the base station negotiate in advance or agree through an agreement that the coordinates of the default position difference = the coordinates of the accurate position of the base station - the coordinates of the fuzzy position of the base station; or, the coordinates of the default position difference = the coordinates of the fuzzy position of the base station - the coordinates of the accurate position of the base station.

[0177] S1206: The satellite determines a second TA of the satellite based on the position difference information, the ambiguous position of the base station, and the position of the satellite.

[0178] After receiving the position difference information, the satellite, having already acquired the base station's ambiguous position in S1201, can determine the base station's exact position based on the position difference information and the base station's ambiguous position. The accurate position of a base station can also be understood as providing more accurate position information than ambiguous position information. Alternatively, it means that the distance difference between the accurate position and the base station is smaller than the distance difference between the ambiguous position and the base station.

[0179] Combined with the description in S1205, when the satellite determines the exact position of the base station based on the position difference information and the fuzzy position of the base station, if the received position difference information also indicates the direction parameter of the position difference, the satellite determines the exact position of the base station based on the position difference, the direction parameter of the position difference and the fuzzy position of the base station.

[0180] For example, the direction parameter of the position difference is "0", the coordinates of the position difference are (△x, △y, △z), and the coordinates of the fuzzy position of the base station are (x1, y1, z1). Then the coordinates of the accurate position of the base station = the coordinates of the fuzzy position of the base station + the coordinates of the position difference, that is, the coordinates of the accurate position of the base station are (x1+△x, y1+△y, z1+△z).

[0181] For example, the direction parameter of the position difference is "1", the coordinates of the position difference are (△x, △y, △z), and the coordinates of the fuzzy position of the base station are (x1, y1, z1). Then the coordinates of the accurate position of the base station = the coordinates of the fuzzy position of the base station - the coordinates of the position difference, that is, the coordinates of the accurate position of the base station are (x1-△x, y1-△y, z1-△z).

[0182] After obtaining the accurate position of the base station, the satellite can further determine the round-trip delay between the satellite and the base station based on the accurate position of the base station and the position of the satellite, which is recorded as Furthermore, the satellite can determine the second TA of the satellite according to the following formula, recorded as T TA,2 :

[0183] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite N TA The value of N TA,offset The value of can be configured by the base station.

[0184] In this embodiment of the present application, the base station transmits its ambiguous location to the satellite before verifying the satellite, thus satisfying the network's management requirements for the base station's location. After the base station verifies the connected satellite, it can transmit position difference information to the satellite. The satellite can then determine the base station's exact location based on this position difference information, facilitating the satellite's more accurate determination of the TA for uplink data transmission. Furthermore, this method of indicating the base station's exact location using position difference information helps reduce signaling overhead.

[0185] Figure 13 is a schematic flow chart of another parameter determination method 1300 provided in an embodiment of the present application. Method 1300 describes a specific implementation of determining a satellite's second TA by using the first configuration information in method 800 to indicate the satellite's TA variation pattern, and determining a satellite's first TA by using the second configuration information in method 800 to indicate the ambiguous position of a base station.

[0186] Method 1300 includes S1301 to S1308, and the specific steps are as follows:

[0187] S1301: A base station sends an ambiguous position of the base station to a satellite, and the satellite receives the ambiguous position of the base station accordingly.

[0188] S1302: The satellite determines a first TA of the satellite based on the ambiguous position of the base station and the position of the satellite.

[0189] In this step, the satellite can determine the round-trip delay between the satellite and the base station based on the fuzzy position of the base station and the position of the satellite, which is recorded as Furthermore, the satellite can determine the first TA of the satellite according to the following formula, denoted as T TA,1 :

[0190] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the fuzzy position of the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite The value of the parameter. TA The value of N TA,offset The value of can be configured by the base station.

[0191] S1303: The satellite accesses the base station based on the first TA.

[0192] S1304: The base station verifies the satellite.

[0193] The implementation process of S1301 to S1304 is similar to the description of S901 to S904 and will not be repeated here.

[0194] S1305: After verifying the satellite, the base station determines the TA variation pattern of the satellite based on the satellite's ephemeris information and the base station's position.

[0195] In the NR communication scenario, the base station sends the beam / cell-level TA, TA change rate, and the rate of change of the TA change rate to the UE. This is because the base station cannot predict the motion trajectory of the UE and cannot determine the TA change law at the UE level. In the satellite communication scenario of the embodiment of the present application, when the satellite acts as an IAB node or NCR and communicates with the base station as a UE, the base station can determine the motion trajectory of the UE (i.e., the satellite) based on the satellite's ephemeris information, and since the position of the base station is known to the base station, the base station can obtain an accurate UE-level TA change law, that is, an accurate satellite TA change law.

[0196] S1306: The base station sends the satellite's TA variation pattern to the satellite. Correspondingly, the satellite receives the satellite's TA variation pattern.

[0197] S1307: The satellite determines a second TA of the satellite based on a change rule of the TA of the satellite.

[0198] The satellite calculates the one-way delay Delay_satellite(t) between the satellite and the base station based on the following formula:

[0199] Among them, TA UE Indicates UE-level TA, TA rate Indicates the change rate of TA at the UE level, TA rate_rate The rate of change of TA at the UE level, t represents the time of sending the signal or using TA or the time when the signal is expected to arrive at the base station, t epoch Indicates the reference time point sent by the base station.

[0200] The satellite determines the round-trip delay between the satellite and the base station based on Delay_satellite(t) For example,

[0201] Furthermore, the satellite can determine the second TA of the satellite according to the following formula, recorded as T TA,2 :

[0202] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station can be configured 0, or the base station does not send to the satellite N TA The value of N TA,offset The value of can be configured by the base station.

[0203] It should be understood that since the TA variation law of the satellite is determined according to the satellite's motion trajectory, the round-trip delay between the satellite and the base station obtained based on the TA variation law of the satellite is More accurate, and then based on the above formula, T TA,2 Is a T TA,1 More accurate TA value.

[0204] Optionally, before the base station determines the satellite's TA variation pattern based on the satellite's ephemeris information and the base station's position, method 1300 further includes S1308: the satellite sends ephemeris information to the base station, and the base station receives the ephemeris information accordingly.

[0205] In one possible scenario, the base station does not know the satellite's ephemeris information and therefore requires the satellite to transmit the ephemeris information. The satellite may proactively initiate the transmission of the ephemeris information, for example, by periodically transmitting the ephemeris information. Alternatively, the base station may proactively initiate the transmission of the ephemeris information, for example, by sending a message from the base station to the satellite requesting ephemeris information. Upon receiving the message, the satellite then transmits the satellite's ephemeris information to the base station.

[0206] In another possible case, the base station already knows the ephemeris information of the satellite, so even if the satellite does not send the ephemeris information to the base station, the base station can still obtain the ephemeris information of the satellite.

[0207] In this embodiment of the present application, the base station transmits its ambiguous location to the satellite before verifying the satellite, thus satisfying the network's location management requirements. After the base station verifies the connected satellite, it can transmit the satellite's TA variation pattern to the satellite, which can then determine a more accurate TA based on the satellite's TA variation pattern. Furthermore, since the base station calculates the satellite's TA variation pattern and transmits it to the satellite, this helps reduce the satellite's computational complexity.

[0208] Figure 14 is a schematic flow chart of another parameter determination method 1400 provided in an embodiment of the present application. Method 1400 describes the specific implementation of determining a satellite's second TA using the first configuration information in method 800 indicating the variation pattern of the satellite's TA, and determining a satellite's first TA using the second configuration information in method 800 indicating the variation pattern of the common TA.

[0209] Method 1400 includes S1401 to S1409, and the specific steps are as follows:

[0210] S1401: The base station determines a change pattern of the public TA based on the location of the base station and the location of a set reference point.

[0211] The common TA change pattern includes the common TA, the common TA rate, and the rate of change of the common TA rate. The reference point is a reference point determined by the base station based on its coverage range. In other words, the reference point is located within the coverage range of the base station.

[0212] S1402: The base station sends a change pattern of the public TA to the satellite, and the satellite receives the change pattern of the public TA accordingly.

[0213] S1403: The satellite determines a first TA of the satellite based on a change pattern of the public TA.

[0214] The satellite calculates the one-way delay Delay_common(t) between the reference point and the base station based on the common TA, the rate of change of the common TA, and the rate of change of the rate of change of the common TA using the following formula:

[0215] Among them, TA common Indicates public TA, represents the rate of change of the public TA, represents the rate of change of the public TA, t represents the time of sending the signal or using the TA or the time when the signal is expected to arrive at the base station, t epoch Indicates the reference time point sent by the base station.

[0216] The satellite determines the round-trip delay between the reference point and the base station based on Delay_common(t), which is recorded as For example,

[0217] Furthermore, the satellite can determine the first TA of the satellite according to the following formula, denoted as T TA,1 :

[0218] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. represents the round-trip delay between the reference point (see the reference point in FIG4A or 4B ) and the base station. Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station may not broadcast ephemeris information or location information, or the base station and the satellite may agree in advance on the calculation of the initial TA time. is 0. N TA The value of N TA,offset The value of can be configured by the base station.

[0219] It should be understood that the variation pattern of the public TA describes the variation pattern of the TA of the reference point selected by the base station, and cannot accurately describe the variation pattern of the TA of each satellite. Therefore, the round-trip delay between the reference point and the base station obtained by the satellite based on the variation pattern of the public TA is There may be deviations from the actual round-trip delay between the satellite and the base station, and the T determined based on the above formula TA,1 May not be accurate.

[0220] S1404: The satellite accesses the base station based on the first TA.

[0221] This step is similar to the description of S903 above and will not be repeated here.

[0222] S1405: The base station verifies the connected satellite.

[0223] This step is similar to the description of S904 above and will not be repeated here.

[0224] S1406: After verifying the satellite, the base station determines the satellite's TA variation pattern based on the satellite's ephemeris information and the base station's position.

[0225] S1407: The base station sends the satellite's TA variation pattern to the satellite. Correspondingly, the satellite receives the satellite's TA variation pattern.

[0226] S1408: The satellite determines a second TA of the satellite based on a change pattern of the TA of the satellite.

[0227] The satellite calculates the one-way delay Delay_satellite(t) between the satellite and the base station based on the following formula:

[0228] Among them, TA UE Indicates UE-level TA, TA rate Indicates the change rate of TA at the UE level, TA rate_rate The rate of change of TA at the UE level, t represents the time of sending the signal or using TA or the time when the signal is expected to arrive at the base station, t epoch Indicates the reference time point sent by the base station.

[0229] The satellite determines the round-trip delay between the satellite and the base station based on Delay_satellite(t) For example,

[0230] Furthermore, the satellite can determine the second TA of the satellite according to the following formula, recorded as T TA,2 :

[0231] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Represents the round-trip delay between the network device and the reference point (see the reference point in Figure 4A or 4B). Represents the round-trip delay between the satellite and the base station. c Indicates the time unit. The base station and the satellite can negotiate in advance is 0. N TA The value of N TA,offsetThe value of can be configured by the base station.

[0232] S1406 to S1408 are similar to the description of S1305 to S1307 above and will not be repeated here.

[0233] Optionally, before the base station determines the satellite's TA variation pattern based on the satellite's ephemeris information and the base station's position, method 1400 further includes S1409: the satellite sends ephemeris information to the base station, and the base station receives the ephemeris information accordingly.

[0234] In this embodiment of the present application, the base station transmits the common TA variation pattern to the satellite before verifying the satellite, which can utilize existing signaling interfaces and save signaling overhead. After the base station verifies the connected satellite, the base station can transmit the satellite's TA variation pattern to the satellite, and the satellite can determine a more accurate TA based on the satellite's TA variation pattern.

[0235] Figure 15 is a schematic flow chart of another parameter determination method 1500 provided in an embodiment of the present application. Method 1500 describes the specific implementation of determining the second TA of a satellite using the location of a base station indicated by the first configuration information in method 800, and determining the first TA of a satellite using the variation pattern of the common TA indicated by the second configuration information in method 800. The location of the base station refers to the exact location of the base station.

[0236] Method 1500 includes S1501 to S1507, and the specific steps are as follows:

[0237] S1501: The base station determines a change pattern of the public TA based on the location of the base station and the location of a set reference point.

[0238] S1502: The base station sends a change pattern of the public TA to the satellite, and the satellite receives the change pattern of the public TA accordingly.

[0239] S1503: The satellite determines a first TA of the satellite based on a change pattern of the public TA.

[0240] S1501 to S1503 are similar to the description of S1401 to S1403 above, and will not be repeated here.

[0241] S1504: The satellite accesses the base station based on the first TA.

[0242] This step is similar to the description of S903 above and will not be repeated here.

[0243] S1505: The base station verifies the connected satellite.

[0244] This step is similar to the description of S904 above and will not be repeated here.

[0245] S1506: After verifying the satellite, the base station sends the accurate position of the base station to the satellite. Correspondingly, the satellite receives the accurate position of the base station.

[0246] S1507 : The satellite determines a second TA of the satellite based on the accurate position of the base station and the position of the satellite.

[0247] S1506 and S1507 are similar to the description of S905 and S906 above, and are not repeated here.

[0248] The accurate location of a base station can also be understood as the location information of the base station that can provide a more accurate TA than the ambiguous location information. Alternatively, it means that the distance difference between the accurate location and the base station is smaller than the distance difference between the ambiguous location and the base station.

[0249] In this embodiment of the present application, before verifying the satellite, the base station transmits the changing pattern of the public TA to the satellite. This does not involve the base station's location information, that is, it does not broadcast the base station's exact location or its ambiguous location. This further satisfies the network's location management requirements. After the base station verifies the connected satellite, it can transmit its exact location to the satellite, which helps the satellite determine a more accurate TA for uplink data transmission.

[0250] Figure 16 is a schematic flow chart of another parameter determination method 1600 provided in an embodiment of the present application. Method 1600 describes a specific implementation of determining a satellite's TA using the first configuration information indicating the base station's location, the second configuration information indicating the base station's ambiguous location, and the round-trip delay between the base station's ambiguous location and the base station, as described in method 800. The base station's location refers to the base station's precise location.

[0251] Method 1600 includes S1601 to S1606, and the specific steps are as follows:

[0252] S1601: The base station sends the ambiguous position of the base station and the round-trip delay between the ambiguous position of the base station and the base station to the satellite. Correspondingly, the satellite receives the ambiguous position of the base station and the round-trip delay between the ambiguous position of the base station and the base station.

[0253] S1602: The satellite determines a first TA of the satellite based on the ambiguous position of the base station, the position of the satellite, and the round-trip delay between the ambiguous position of the base station and the base station.

[0254] Referring to FIG17 , which shows a schematic diagram of the ambiguous position of a base station in another IAB communication scenario, the IAB communication scenario shown in FIG17 includes IAB node 1, IAB node 2, and a base station. The ambiguous position of the base station can be a location far away from the base station. Taking the satellite as an example of IAB node 1, the satellite determines the round-trip delay between the satellite and the ambiguous position of the base station based on the ambiguous position of the base station and the position of the satellite, which is recorded as The round-trip delay between the fuzzy position of the base station and the base station refers to the round-trip delay between the fuzzy position of the base station and the accurate position of the base station, which is recorded as The satellite determines the first TA of the satellite based on the following formula, recorded as T TA,1 :

[0255] Among them, N TA Indicates the TA adjustment amount, N at initial access TA = 0. N TA,offset Indicates the TA offset, which is related to the duplex mode. Indicates the round-trip delay between the fuzzy position (reference point) of the base station and the accurate position of the base station. Represents the round-trip delay between the fuzzy position of the satellite and the base station. c Indicates the time unit. N TA The value of N TA,offset The value of can be configured by the base station.

[0256] In this step, the base station sends the round-trip delay between the fuzzy position of the base station and the accurate position of the base station to the satellite. In another implementation, the base station indicates the round-trip delay between the ambiguous position of the base station and the base station through a public TA-related parameter corresponding to the ambiguous position of the base station.

[0257] The satellite calculates the one-way delay Delay_common_false(t) between the base station's fuzzy position and the base station's accurate position based on the following formula:

[0258] Among them, TA common,fasle It can be determined based on the public TA corresponding to the ambiguous position of the base station, and Respectively represent TA common,fasle The rate of change and TA common,fasle The rate of change of the rate of change, for example and Can be set to 0.

[0259] Furthermore, the satellite determines the round-trip delay between the fuzzy position of the base station and the accurate position of the base station based on Delay_common_false(t) For example,

[0260] S1603: The satellite accesses the base station based on the first TA.

[0261] S1604: The base station verifies the connected satellite.

[0262] S1605: After successfully verifying the satellite, the base station sends the accurate position of the base station to the satellite. Correspondingly, the satellite receives the accurate position of the base station.

[0263] S1606: The satellite determines a second TA of the satellite based on the accurate position of the base station and the position of the satellite.

[0264] S1603 to S1606 are similar to the description of S903 to S906 above and are not repeated here.

[0265] The accurate location of a base station can also be understood as the location information of the base station that can provide a more accurate TA than the ambiguous location information. Alternatively, it means that the distance difference between the accurate location and the base station is smaller than the distance difference between the ambiguous location and the base station.

[0266] In an embodiment of the present application, before verifying the satellite, the base station sends the fuzzy position of the base station to the satellite, meeting the network management requirements for the location of the base station. In addition, the base station can also send the round-trip delay between the fuzzy position of the base station and the base station to the satellite. The round-trip delay between the fuzzy position of the base station and the base station can compensate for the delay error caused by the satellite's TA determined based on the fuzzy position of the satellite and the position of the satellite. This is conducive to improving the accuracy of the satellite's TA and can expand the selection range of the fuzzy position of the base station, further meeting the network management requirements for the location of the base station. After the base station verifies the accessed satellite, the base station can send the accurate position of the base station to the satellite, which is conducive to the satellite determining a more accurate TA for uplink data transmission.

[0267] In addition to the embodiments described above, some steps in the above methods may be combined to form other possible embodiments.

[0268] For example, an embodiment obtained by combining S1601 and S1602 in method 1600 with S1205 and S1206 in method 1200 may include: the base station sends the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the base station to the satellite; the satellite determines the first TA of the satellite based on the fuzzy position of the base station, the position of the satellite, and the round-trip delay between the fuzzy position of the base station and the base station; the satellite accesses the base station based on the first TA; the base station verifies the accessed satellite; after the base station verifies the accessed satellite, the base station sends position difference information to the satellite, and the position difference information indicates the position difference between the accurate position of the base station and the fuzzy position of the base station; the satellite determines the second TA of the satellite based on the position difference information, the fuzzy position of the base station and the position of the satellite.

[0269] For example, an embodiment obtained by combining S1601 and S1602 in method 1600 with S1305 to S1308 in method 1300 may include: the base station sends the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the base station to the satellite; the satellite determines the first TA of the satellite based on the fuzzy position of the base station, the position of the satellite, and the round-trip delay between the fuzzy position of the base station and the base station; the satellite accesses the base station based on the first TA; the base station verifies the accessed satellite; after the base station verifies the accessed satellite, the base station sends the satellite's TA change rule to the satellite; the satellite determines the satellite's second TA based on the satellite's TA change rule.

[0270] It should be understood that the above embodiments are described using a satellite communication network within an NTN communication network as an example. Furthermore, the solutions of the embodiments of the present application can also be applied to a high altitude platform system (HAPS) within an NTN communication network. The steps and / or processes executed by the satellite can be implemented by a non-terrestrial flying object with similar or analogous functions to the satellite. Furthermore, taking the example of a satellite transparent transmission mode where a gateway / signaling station and a base station are located together or in close proximity, the feeder link latency can be approximated to the latency between the satellite and the gateway / signaling station. Therefore, the steps and / or processes executed by the base station can be implemented by a gateway / signaling station, which has the functionality of a base station or some of the functionality of a base station.

[0271] It should be noted that other embodiments obtained by combining the steps in the implementation methods described above are all within the scope of protection of this application.

[0272] It should be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0273] The parameter determination method according to the embodiment of the present application is described in detail above in conjunction with Figures 8 to 17. The parameter determination device according to the embodiment of the present application will be described in detail below in conjunction with Figures 18 to 20.

[0274] FIG18 is a schematic block diagram of a parameter determination device 1800 provided in an embodiment of the present application. The device 1800 includes: a processing module 1810 and a receiving module 1820 .

[0275] Among them, the processing module 1810 is used to: access the base station based on the first TA of the satellite; the receiving module 1820 is used to: receive first configuration information from the base station, the first configuration information is received after the base station verifies the accessed satellite, and the first configuration information is used to indicate the location of the base station, or the first configuration information is used to indicate the TA change pattern of the satellite; the processing module 1810 is also used to: determine the second TA of the satellite based on the first configuration information, and the second TA is used for the satellite to perform uplink data transmission.

[0276] Optionally, the first configuration information is used to indicate the location of the base station; the processing module 1810 is used to determine the second TA of the satellite based on the location of the base station and the location of the satellite.

[0277] Optionally, the first configuration information is used to indicate a TA change rule of the satellite; the processing module 1810 is used to determine a second TA of the satellite based on the TA change rule of the satellite.

[0278] Optionally, the receiving module 1820 is configured to: receive second configuration information from a base station. The processing module 1810 is configured to: determine a first TA of the satellite based on the second configuration information.

[0279] Optionally, the second configuration information is used to indicate the fuzzy position of the base station, and the fuzzy position of the base station is determined based on the position of the base station and a preset TA accuracy range; the processing module 1810 is used to: determine the first TA of the satellite based on the fuzzy position of the base station and the position of the satellite.

[0280] Optionally, the first configuration information is used to indicate the location of the base station, including: the first configuration information includes the coordinates of the location of the base station; or the first configuration information includes the difference between the coordinates of the ambiguous location of the base station and the coordinates of the location of the base station.

[0281] Optionally, the second configuration information is used to indicate a change pattern of the common TA; the processing module 1810 is used to determine the first TA of the satellite based on the change pattern of the common TA.

[0282] Optionally, the second configuration information is also used to indicate the round-trip delay between the ambiguous position of the base station and the position of the base station; the processing module 1810 is used to: determine the round-trip delay between the satellite and the ambiguous position of the base station based on the ambiguous position of the base station and the position of the satellite; and determine the first TA of the satellite based on the round-trip delay between the ambiguous position of the satellite and the base station, and the round-trip delay between the ambiguous position of the base station and the position of the base station.

[0283] In an alternative example, those skilled in the art will appreciate that apparatus 1800 may be specifically a satellite in the aforementioned embodiments, or the functions of the satellite in the aforementioned embodiments may be integrated into apparatus 1800. The aforementioned functions may be implemented via hardware, or via hardware executing corresponding software. This hardware or software includes one or more modules corresponding to the aforementioned functions. For example, the aforementioned receiving module 1820 may be a communication interface, such as a transceiver interface. Apparatus 1800 may be configured to execute the various processes and / or steps corresponding to the satellite in the aforementioned method embodiments.

[0284] FIG19 is a schematic block diagram of another parameter determination device 1900 provided in an embodiment of the present application. The device 1900 includes: a processing module 1910 and a sending module 1920 .

[0285] Among them, the processing module 1910 is used to: verify the satellite accessing the base station; the sending module 1920 is used to: when the satellite verification is passed, send the first configuration information to the satellite, the first configuration information is used to indicate the location of the base station, or the first configuration information is used to indicate the TA change rule of the satellite.

[0286] Optionally, the processing module 1910 is configured to: verify the device type of the satellite. Verifying that the satellite is passed includes: if the device type of the satellite is a network device, verifying that the satellite is passed.

[0287] Optionally, the first configuration information is used to indicate the location of the base station, including: the first configuration information includes the coordinates of the accurate location of the satellite; or the first configuration information includes the difference between the coordinates of the fuzzy location of the base station and the coordinates of the location of the base station.

[0288] Optionally, the sending module 1920 includes: sending second configuration information to the satellite, the second configuration information is used to indicate the fuzzy position of the base station, or, the second configuration information is used to indicate the changing pattern of the public TA, or, the second configuration information is used to indicate the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the position of the base station, the fuzzy position of the base station is determined based on the position of the base station and a preset TA accuracy range.

[0289] Optionally, the first configuration information is used to indicate a TA variation pattern of the satellite; the processing module 1910 is used to: obtain the ephemeris information of the satellite; and determine the TA variation pattern of the satellite based on the ephemeris information of the satellite and the position of the base station.

[0290] In an optional example, those skilled in the art will appreciate that apparatus 1900 may be specifically the base station in the above-described embodiments, or the functions of the base station in the above-described embodiments may be integrated into apparatus 1900. The above-described functions may be implemented via hardware, or by hardware executing corresponding software. The hardware or software may include one or more modules corresponding to the above-described functions. For example, the above-described sending module 1920 may be a communication interface, such as a transceiver interface. Apparatus 1900 may be configured to execute the various processes and / or steps corresponding to the base station in the above-described method embodiments.

[0291] It should be understood that the apparatus 1800 and the apparatus 1900 herein are embodied in the form of functional modules. The term "module" herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functionality.

[0292] In the embodiments of the present application, the apparatus 1800 and the apparatus 1900 may also be a chip or a chip system, such as a system on chip (SoC). Correspondingly, the transceiver module may be a transceiver circuit of the chip, which is not limited here.

[0293] Figure 20 is a schematic block diagram of another parameter determination device 2000 provided in an embodiment of the present application. The device 2000 includes a processor 2010, a transceiver 2020, and a memory 2030. The processor 2010, the transceiver 2020, and the memory 2030 communicate with each other via an internal connection path. The memory 2030 is used to store instructions, and the processor 2010 is used to execute the instructions stored in the memory 2030 to control the transceiver 2020 to send and / or receive signals.

[0294] It should be understood that apparatus 2000 can be specifically a satellite or base station in the above-described embodiments, or the functions of the satellite or base station in the above-described embodiments can be integrated into apparatus 2000. Apparatus 2000 can be used to execute the various steps and / or processes corresponding to the satellite or base station in the above-described method embodiments. Optionally, the memory 2030 can include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory can also include non-volatile random access memory. For example, the memory can also store device type information. The processor 2010 can be used to execute instructions stored in the memory, and when the processor executes the instructions, the processor 2010 can perform the various steps and / or processes corresponding to the satellite or base station in the above-described method embodiments.

[0295] It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0296] During implementation, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor executes the instructions in the memory, and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0297] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0298] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0299] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0300] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected to achieve the purpose of the present embodiment according to actual needs.

[0301] In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0302] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0303] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A parameter determination method, characterized in that: Applied to a satellite, the method comprises: Accessing a base station based on a first timing advance TA of the satellite; receiving first configuration information from the base station, the first configuration information being received after the base station successfully verifies the accessed satellite, the first configuration information being used to indicate the location of the base station, or the first configuration information being used to indicate a TA change rule of the satellite; A second TA of the satellite is determined based on the first configuration information, where the second TA is used for uplink data transmission by the satellite.

2. The method according to claim 1, characterized in that The first configuration information is used to indicate the location of the base station; The determining, based on the first configuration information, a second TA of the satellite includes: Based on the location of the base station and the location of the satellite, a second TA of the satellite is determined.

3. The method according to claim 1, characterized in that: The first configuration information is used to indicate a TA change rule of the satellite; The determining, based on the first configuration information, a second TA of the satellite includes: Based on a TA variation rule of the satellite, a second TA of the satellite is determined.

4. The method according to any one of claims 1 to 3, characterized in that Before the first TA based on the satellite accesses the base station, the method further includes: receiving second configuration information from the base station; Based on the second configuration information, a first TA of the satellite is determined.

5. The method according to claim 4, characterized in that The second configuration information is used to indicate an ambiguous position of the base station, where the ambiguous position of the base station is determined based on the position of the base station and a preset TA accuracy range; The determining, based on the second configuration information, a first TA of the satellite includes: A first TA of the satellite is determined based on the ambiguous position of the base station and the position of the satellite.

6. The method according to claim 5, characterized in that The first configuration information is used to indicate the location of the base station, including: The first configuration information includes the coordinates of the location of the base station; or, The first configuration information includes a difference between the coordinates of the ambiguous position of the base station and the coordinates of the position of the base station.

7. The method according to claim 4, characterized in that The second configuration information is used to indicate a change rule of the public TA; The determining, based on the second configuration information, a first TA of the satellite includes: Based on the variation rule of the common TA, a first TA of the satellite is determined.

8. The method according to claim 5 or 6, characterized in that: The second configuration information is further used to indicate a round trip delay between the ambiguous position of the base station and the position of the base station; The determining, based on the ambiguous position of the base station and the position of the satellite, a first TA of the satellite comprises: Determining a round trip delay between the satellite and the ambiguous position of the base station based on the ambiguous position of the base station and the position of the satellite; A first TA of the satellite is determined based on a round trip delay between the satellite and an ambiguous position of the base station and a round trip delay between the ambiguous position of the base station and the position of the base station.

9. A parameter determination method, characterized in that: Applied to base stations, including: Verifying the satellite connected to the base station; In case the satellite is verified to be successful, first configuration information is sent to the satellite, where the first configuration information is used to indicate the position of the base station, or the first configuration information is used to indicate a change rule of the timing advance TA of the satellite.

10. The method according to claim 9, characterized in that The verifying the satellite accessing the base station includes: Verify the equipment type of the satellite; The verification of the satellite being passed includes: If the device type of the satellite is a network device, the satellite is verified to be successful.

11. The method according to claim 9 or 10, characterized in that: The first configuration information is used to indicate the location of the base station, including: The first configuration information includes the coordinates of the exact position of the satellite; or, The first configuration information includes a difference between the coordinates of the ambiguous position of the base station and the coordinates of the position of the base station.

12. The method according to any one of claims 9 to 11, characterized in that Before verifying the satellite accessing the base station, the method further includes: Sending second configuration information to the satellite, wherein the second configuration information is used to indicate the fuzzy position of the base station, or the second configuration information is used to indicate the changing rule of the public TA, or the second configuration information is used to indicate the fuzzy position of the base station and the round-trip delay between the fuzzy position of the base station and the position of the base station, the fuzzy position of the base station is determined based on the position of the base station and a preset TA accuracy range.

13. The method according to any one of claims 9 to 12, characterized in that The first configuration information is used to indicate a TA change rule of the satellite; Before sending the first configuration information to the satellite, the method further includes: Obtaining ephemeris information of the satellite; Based on the ephemeris information of the satellite and the position of the base station, a TA variation rule of the satellite is determined.

14. A parameter determination device, characterized in that: The method comprises a module for implementing the method according to any one of claims 1 to 8, or comprises a module for implementing the method according to any one of claims 9 to 13.

15. A parameter determination device, characterized in that: The method comprises a processor coupled to a memory, wherein the memory is used to store programs or instructions. When the programs or instructions are executed by the processor, the method according to any one of claims 1 to 8 is executed, or the method according to any one of claims 9 to 13 is executed.

16. A computer-readable storage medium, characterized in that: Used to store a computer program, which, when executed on a computer, causes the method according to any one of claims 1 to 8 to be executed, or causes the method according to any one of claims 9 to 13 to be executed.

Images