Method and system for transmitting ephemeris information, base station device and core network device

Abstract

The application discloses a kind of ephemeris information transmission method, system, base station equipment and core network equipment. Among them, the method comprises: sending first request message to core network equipment, wherein the first request message is used to establish communication link between base station and core network equipment, the information carried in the first request message includes: cell information, cell information is obtained by dividing the geographical area served by base station into one or more cells;Receive the first response message returned by core network equipment based on the first request message, wherein the information carried in the first response message includes: the ephemeris information of one or more cells;One or more cells of ephemeris information is broadcast to terminal by specifying system information block.The present application solves the technical problems of low robustness and reliability in the ephemeris information transmission method provided in the related art.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and more specifically, to a method, system, base station equipment, and core network equipment for transmitting ephemeris information. Background Technology

[0002] With the rapid development of wireless communication technology, satellite communication, with its wide coverage and rapid deployment capabilities, has gradually become an indispensable part of communication and emergency response. To further expand the application boundaries of 5G technology and achieve seamless integration of terrestrial and non-terrestrial networks, the 3GPP standardization organization is actively promoting research and standardization of Non-Terrestrial Networks (NTNs), aiming to enhance the performance of satellite communication systems using 5G technology. In the NTN architecture, ephemeris information, as key data, is crucial for functions such as beam management, timing synchronization, and user positioning. However, the ephemeris information transmission methods in related technologies suffer from robustness and low reliability, making it difficult to ensure the accuracy and effectiveness of ephemeris information.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a method, system, base station equipment, and core network equipment for transmitting ephemeris information, in order to at least solve the technical problems of low robustness and reliability in ephemeris information transmission methods provided in related technologies.

[0005] According to one aspect of the present invention, a method for transmitting ephemeris information is provided, comprising: sending a first request message to a core network device, wherein the first request message is used to establish a communication link between a base station and the core network device, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; receiving a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells; and broadcasting the ephemeris information of one or more cells to a terminal through a specified system information block.

[0006] Optionally, the base station includes: a base station centralization unit, which receives a first response message returned by the core network device based on the first request message, including: using the base station centralization unit to receive the first response message returned by the core network device based on the first request message.

[0007] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes: locally storing the ephemeris information of one or more cells in a base station central unit.

[0008] Optionally, the base station further includes: a base station distribution unit. The ephemeris information transmission method in this embodiment of the invention further includes: receiving a second request message from the base station distribution unit through a base station centralization unit, wherein the second request message is used to establish a communication link between the base station centralization unit and the base station distribution unit; and returning a second response message corresponding to the second request message to the base station distribution unit through the base station centralization unit, wherein the information carried in the second response message includes: ephemeris information of one or more cells.

[0009] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes: receiving a first configuration update message from a core network device, wherein the first configuration update message is used to update the configuration information between the base station and the core network device, and the information carried in the first configuration update message includes: updated ephemeris information; and broadcasting the updated ephemeris information to the terminal through a specified system information block.

[0010] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes: receiving a first configuration update message from a core network device through a base station centralization unit; and sending a second configuration update message to a base station distribution unit through the base station centralization unit, wherein the second configuration update message is used to update the configuration information between the base station centralization unit and the base station distribution unit, and the information carried in the second configuration update message includes: the updated ephemeris information.

[0011] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes: receiving a third configuration update message from a base station distribution unit through a base station centralization unit, wherein the information carried in the third configuration update message includes: updated cell information; sending a fourth configuration update message to a core network device through a base station centralization unit, wherein the information carried in the fourth configuration update message includes: updated cell information; receiving a first update response message returned by the core network device based on the fourth configuration update message through a base station centralization unit, wherein the information carried in the first update response message includes: updated ephemeris information; and returning a second update response message to a base station distribution unit through a base station centralization unit, wherein the information carried in the second update response message includes: updated ephemeris information.

[0012] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes: sending a fifth configuration update message to the core network equipment through the base station centralization unit, wherein the information carried in the fifth configuration update message includes: updated cell information; receiving a third update response message returned by the core network equipment based on the fifth configuration update message through the base station centralization unit, wherein the information carried in the third update response message includes: updated ephemeris information; sending a sixth configuration update message to the base station distribution unit through the base station centralization unit, wherein the sixth configuration update message is used to update the configuration information between the base station centralization unit and the base station distribution unit, and the information carried in the sixth configuration update message includes: updated ephemeris information; and receiving a fourth update response message returned by the base station distribution unit based on the sixth configuration update message through the base station centralization unit.

[0013] According to another aspect of the present invention, another method for transmitting ephemeris information is also provided, comprising: receiving a first request message from a base station, wherein the first request message is used to establish a communication link between the base station and a core network device, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; and returning a first response message to the base station based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells, and the base station is used to broadcast the ephemeris information of one or more cells to a terminal through a specified system information block.

[0014] Optionally, another method for transmitting ephemeris information in this embodiment of the invention further includes: constructing a global view based on cell information, wherein the global view is used to describe the constellation status of the entire network and the cell status of the base station; and customizing ephemeris information of one or more cells for the base station based on the global view.

[0015] Optionally, another ephemeris information transmission method in this embodiment of the invention further includes: in response to the determination of an update of ephemeris information of one or more cells based on a global view, sending a first configuration update message to the base station, wherein the first configuration update message is used to update the configuration information between the base station and the core network equipment, and the information carried in the first configuration update message includes: the updated ephemeris information, and the base station is also used to broadcast the updated ephemeris information to the terminal through a specified system information block.

[0016] Optionally, another ephemeris information transmission method in this embodiment of the invention further includes: receiving a fourth configuration update message from a base station, wherein the information carried in the fourth configuration update message includes: updated cell information; and returning a first update response message based on the fourth configuration update message, wherein the information carried in the first update response message includes: updated ephemeris information.

[0017] Optionally, another ephemeris information transmission method in this embodiment of the invention further includes: receiving a fifth configuration update message from a base station, wherein the information carried in the fifth configuration update message includes: updated cell information; and returning a third update response message based on the fifth configuration update message, wherein the information carried in the third update response message includes: updated ephemeris information.

[0018] According to another aspect of the present invention, an ephemeris information transmission device is also provided, comprising: a sending module, configured to send a first request message to a core network device, wherein the first request message is used to establish a communication link between a base station and the core network device, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; a first receiving module, configured to receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells; and a broadcasting module, configured to broadcast the ephemeris information of one or more cells to a terminal through a specified system information block.

[0019] According to another aspect of the present invention, another ephemeris information transmission device is also provided, comprising: a second receiving module, configured to receive a first request message from a base station, wherein the first request message is used to establish a communication link between the base station and a core network device, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; and a returning module, configured to return a first response message to the base station based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells, and the base station is configured to broadcast the ephemeris information of one or more cells to a terminal through a specified system information block.

[0020] According to another aspect of the present invention, an ephemeris information transmission system is also provided, comprising at least: a core network device, a base station, and a terminal, wherein the base station is used to execute the ephemeris information transmission method in the embodiments of the present invention, and the core network device is used to execute another ephemeris information transmission method in the embodiments of the present invention.

[0021] According to another aspect of the present invention, a base station device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the ephemeris information transmission method of the present invention during runtime.

[0022] According to another aspect of the present invention, a core network device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes another ephemeris information transmission method according to the present invention during runtime.

[0023] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the storage medium is located to execute the ephemeris information transmission method of any one of the embodiments of the present invention.

[0024] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the ephemeris information transmission method of the present invention.

[0025] According to another aspect of the present invention, a chip system is also provided, comprising: a processor for calling and running a computer program from a memory, such that a communication device equipped with the chip system performs the ephemeris information transmission method of the present invention.

[0026] In this embodiment of the invention, by sending a first request message to the core network device, and then receiving a first response message returned by the core network device based on the first request message, and finally broadcasting ephemeris information of one or more cells to the terminal through a specified system information block, the purpose of efficiently and accurately transmitting ephemeris information to the terminal device is achieved. This realizes the technical effect of improving the robustness and reliability of ephemeris information transmission, and solves the technical problem of low robustness and reliability of ephemeris information transmission methods provided in related technologies. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a flowchart of a method for transmitting ephemeris information according to one embodiment of the present invention;

[0029] Figure 2 This is a flowchart of another method for transmitting ephemeris information according to one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of an ephemeris information transmission method according to one embodiment of the present invention;

[0031] Figure 4 This is a structural block diagram of an ephemeris information transmission device according to one embodiment of the present invention;

[0032] Figure 5 This is a structural block diagram of another ephemeris information transmission device according to one embodiment of the present invention. Detailed Implementation

[0033] For ease of understanding, some concepts related to embodiments of the present invention are illustrated below for reference.

[0034] Non-terrestrial Network (NTN): A communication network architecture that transcends traditional terrestrial base station networks. It utilizes non-terrestrial nodes such as satellites, drones, and high-altitude platforms (e.g., stratospheric balloons) as part of the network to provide broader communication coverage and services. The primary goal of NTN is to fill gaps in terrestrial network coverage, such as in remote areas, oceans, the air, and areas where terrestrial infrastructure may be damaged in the event of a disaster, achieving seamless global communication connectivity. In the NTN architecture, these non-terrestrial nodes can serve as direct communication links or as relay nodes, transmitting signals from the ground to another ground node or directly to user equipment. NTN design also considers integration with existing terrestrial networks (such as 5G) to enhance network resilience and quality of service. Through the accurate transmission of ephemeris information, NTN can support beam management, timing synchronization, frequency compensation, and other functions, thereby ensuring efficient network operation and reliable user services.

[0035] Ground control link (or feeder link): A communication link established between the ground control station and the satellite, used to transmit control commands and data, ensuring that the satellite can operate and adjust according to predetermined mission requirements. In satellite communication systems, especially NTN systems, the ground control link undertakes the task of transmitting critical data such as ephemeris information, satellite health status, and mission commands. Its stability and transmission efficiency directly affect the performance and reliability of the satellite network, and it is an important component for achieving precise satellite orbit control, signal transmission adjustment, and network management.

[0036] Inter-satellite links (ISL) are communication connections established directly between satellites within a satellite constellation. ISLs allow satellites to transmit data and control information directly without relaying through ground stations, thus improving system communication efficiency and flexibility. Specifically, ISLs can use radio waves (such as microwaves or millimeter waves) or laser beams (optical communication), the choice depending on constellation design, communication requirements, distances between satellites, and link bandwidth requirements. The use of ISLs is of great significance for building a globally covering satellite communication network, achieving low-latency data transmission, and enhancing network robustness.

[0037] The 3rd Generation Partnership Project (3GPP) is a global telecommunications industry association comprised of telecommunications standards bodies worldwide. It is dedicated to developing and publishing globally unified standards for mobile communication network systems and technologies. 3GPP's main work focuses on developing and maintaining specifications for second-generation (2G), third-generation (3G), fourth-generation (4G), and even fifth-generation (5G) cellular network technologies, particularly Long Term Evolution (LTE) and 5G New Radio (NR) technologies. These standards cover not only the design of the Radio Access Network (RAN) but also specifications for the core network, service capabilities, and terminal equipment, ensuring interoperability of equipment from different manufacturers under the same standard.

[0038] The 3GPP 38.413 and 3GPP 38.473 protocols are part of a series of specification documents developed by 3GPP for 5G NR systems, which define the signaling procedures and technical details of different interfaces.

[0039] 3GPP 38.413 defines the NG interface, the control plane interface between the Access Network (AN) and the core network in 5G systems. The NG interface is the interface between the base station and the core network (such as the Access and Mobility Management Function (AMF)) in a 5G system, used to transmit control plane information. The NG interface definition details various control messages exchanged between the base station and the AMF, including but not limited to connection establishment, modification, and release, as well as user equipment context management. To achieve efficient and reliable control information transmission, 3GPP 38.413 employs sophisticated signaling procedures and message formats to ensure seamless collaboration between the radio access network and the core network, supporting user mobility and management functions in 5G systems.

[0040] 3GPP 38.473 defines the protocol for the F1 interface, the control plane interface within a 5G base station. The F1 interface is used between the base station central unit and the base station distributed unit for transmitting control plane data. The base station central unit is responsible for handling higher-level control plane functions, such as handover, radio resource management, and user plane data transmission, while the base station distributed unit is responsible for lower-level physical layer control and data processing. Protocol 38.473 specifies how the base station central unit and the base station distributed unit exchange information and coordinate their work, ensuring the efficient and reliable operation of the base station's internal control plane. Specifically, 3GPP 38.473 includes messages for establishing, maintaining, and releasing F1 interface connections, as well as the transmission of control information for user equipment context management, radio resource configuration, and measurement report processing.

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] With the rapid development of wireless communication technology, satellite communication, with its wide coverage and rapid deployment capabilities, has gradually become an indispensable part of communication and emergency response. To further expand the application boundaries of 5G technology and achieve seamless integration of terrestrial and non-terrestrial networks, the 3GPP standardization organization is actively promoting the research and standardization of NTN (Network Telecommunication Network), aiming to enhance the performance of satellite communication systems using 5G technology. In the NTN architecture, ephemeris information, as key data, is crucial for functions such as beam management, timing synchronization, and user positioning. However, the ephemeris information transmission methods in related technologies suffer from robustness and low reliability, making it difficult to ensure the accuracy and effectiveness of ephemeris information.

[0044] Specifically, in related technologies, the generation of ephemeris information mainly relies on ground tracking stations on the ground, combined with the satellite's own measurement data. After the ephemeris information is generated, it is transmitted from the ground to the base station, and then broadcast to the terminal through the base station. There are various ways to transmit to the base station, such as through the ground control link or through ISL. Regardless of the transmission method used, how to efficiently and accurately transmit ephemeris information and ensure its accuracy and reliability is the key research direction for ephemeris information transmission.

[0045] According to embodiments of the present invention, a method embodiment for transmitting ephemeris information is provided. The method embodiment provided in this invention can be executed in a terminal device (the terminal device may include, but is not limited to, a satellite terminal, a mobile terminal), or a similar network device. Taking operation on a base station as an example, the base station may include one or more processors (processors may include, but are not limited to, microprocessors such as MCUs or programmable logic devices such as FPGAs), a memory for storing data, and a transmission device for communication functions. Those skilled in the art will understand that the above structure is merely exemplary and does not limit the structure of the base station. For example, the base station may also include more or fewer components, or have different configurations.

[0046] The memory can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the ephemeris information transmission method in this embodiment of the invention. The processor executes various functional applications and data processing by running the computer program stored in the memory, thereby implementing the above-described method. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor.

[0047] The transmission equipment is used to receive or send data via a network. Specific examples of the network mentioned above may include a wireless network provided by the base station's communication provider, and inter-satellite links between other base stations and ground control stations. In one example, the transmission equipment includes a Network Interface Controller (NIC), which can connect to other network devices via the base station to communicate with the Internet.

[0048] Figure 1 This is a method for transmitting ephemeris information according to one embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0049] Step S11: Send a first request message to the core network equipment. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0050] The aforementioned core network equipment refers to network entities in a 5G communication system responsible for control plane and user plane data transmission, network access control, mobility management, authentication, and other functions. These typically include, but are not limited to, components such as the AMF (Active Network Controller), Session Management Function (SMF), and User Plane Function (UPF). Specifically, the transmission of ephemeris information primarily involves the AMF. The AMF manages and distributes ephemeris information to each base station, ensuring that the base station can correctly perform NTN-related functions such as beam management and user positioning.

[0051] The aforementioned first request message refers to the message initiated by the base station when establishing a communication link between the base station and the core network equipment. Specifically, the aforementioned first request message can be the NG SETUP REQUEST in the 3GPP 38.413 protocol. The NGSETUP REQUEST is the initial message used by the base station and the AMF in the 3GPP NR system to establish an NG interface communication link. It is used to inform the core network equipment of the existence of the base station and request the establishment of the necessary communication link for subsequent data exchange and control command transmission.

[0052] The aforementioned cell information refers to the relevant information after the geographical area served by the base station is divided into one or more cells. Specifically, the aforementioned cell information includes, but is not limited to, the cell's unique identifier, the cell's geographical location information (such as latitude and longitude coordinates), the cell's coverage area, the cell's frequency band information, the cell's bandwidth configuration, the cell's carrier configuration, and the cell's current status (such as idle, busy, faulty, etc.).

[0053] Specifically, the purpose of including cell information in the first request message sent to the core network equipment is to enable the core network's AMF (Advanced Feature Controller) to identify the service area of ​​the base station and transmit ephemeris data in a customized manner based on the cell information. For example, the AMF can select the most suitable ephemeris data for transmission based on the geographical location and coverage characteristics of different cells, thereby improving transmission efficiency and reducing unnecessary network load. Furthermore, cell information also helps the AMF maintain and update ephemeris data, ensuring that all cells receive the latest and most accurate ephemeris data, thus improving the stability of the satellite communication system.

[0054] For example, by including cell information on the base station in the NG SETUP REQUEST message, the core network equipment can learn about the configuration and status of the base station, including but not limited to which cells are running on the base station and the detailed parameters of the aforementioned cells.

[0055] Step S12: Receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells;

[0056] The aforementioned first response message refers to the NG SETUP RESPONSE sent by the AMF in response to the base station's request after the base station sends an NG SETUP REQUEST to establish a communication link with the AMF. The NG SETUP RESPONSE is part of the 3GPP 38.413 protocol and is used to establish an NG interface link between the base station and the AMF, confirm the base station's request, and carry ephemeris information for one or more cells.

[0057] The ephemeris information mentioned above, or satellite ephemeris, is a set of data describing a satellite's precise position, velocity, and time parameters in space, and is crucial for applications such as satellite communication, navigation, and remote sensing. Specifically, ephemeris information includes, but is not limited to, the following key parameters: satellite nadir position, satellite orbital parameters, satellite velocity parameters, satellite clock parameters, and satellite health status. The satellite nadir position is the point directly below the Earth's surface, used to determine the satellite's coverage area and geographical location. Satellite orbital parameters include, but are not limited to, the semi-major axis of the orbit, orbital eccentricity, orbital inclination, right ascension of the ascending node, and perigee distance, used to calculate the satellite's instantaneous position. Satellite velocity parameters include, but are not limited to, the satellite's radial and tangential velocities, used to accurately predict changes in satellite position. Satellite clock parameters include, but are not limited to, clock skew and clock drift, used to correct satellite signal transmission time and ensure accurate time synchronization. Satellite health status indicates whether the satellite is functioning properly.

[0058] Specifically, by directly carrying ephemeris information in the NG SETUP RESPONSE message, the base station can immediately obtain the required ephemeris information without additional requests or waiting, thereby improving the efficiency of ephemeris information transmission and reducing errors during transmission, thus improving the accuracy of the ephemeris information. Secondly, the direct transmission of ephemeris information reduces the need for transmission through multiple network nodes, lowering the risk of data loss or delay, thereby enhancing the stability and reliability of the entire communication network.

[0059] Step S13: Broadcast ephemeris information of one or more cells to the terminal through a specified system information block.

[0060] The System Information Block (SIB) is a key mechanism in mobile communication systems used to broadcast network configuration and control information. It is mainly used in LTE and NR systems, namely 4G and 5G network technologies standardized by 3GPP. The SIB contains a series of sub-information blocks, each responsible for broadcasting different parameters and configuration information in the network, such as cell selection and reselection parameters, cell access control information, cell-specific common physical layer and medium access control layer (MAC) information, to ensure that the terminal can correctly access the network and conduct subsequent communication.

[0061] Specifically, in the 3GPP specifications, SIBs are typically broadcast via common downlink channels. For example, in LTE, they are broadcast via the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH), while in NR, they are broadcast via the corresponding channels. When a terminal first accesses the network, it first receives Minimum System Information (SIB1). SIB1 contains scheduling information for obtaining other SIBs, guiding the terminal on how to receive subsequent SIBs, and includes basic parameters required for cell access, such as cell access control information, cell reselection parameters, and timing advance.

[0062] For example, the aforementioned designated system information block can be SIB19. Specifically, in the 3GPP NR system, SIB19 is a system information block specifically used for broadcasting ephemeris information. Its design purpose is to enable terminal devices to obtain satellite ephemeris data in a timely manner in NTN scenarios, thereby enabling effective beam management and positioning services.

[0063] The aforementioned terminals refer to devices used in the 3GPP NTN system for receiving and processing wireless communication signals, including but not limited to smartphones, tablets, IoT devices, vehicle communication units, wearable devices, industrial control terminals, satellite phones, dedicated satellite communication receivers, and any device capable of communicating with the NTN system wirelessly.

[0064] Based on the above steps S11 to S13, in this embodiment of the invention, by sending a first request message to the core network device, and then receiving a first response message returned by the core network device based on the first request message, and finally broadcasting ephemeris information of one or more cells to the terminal through a specified system information block, the purpose of efficiently and accurately transmitting ephemeris information to the terminal device is achieved. This realizes the technical effect of improving the robustness and reliability of ephemeris information transmission, and solves the technical problem of low robustness and reliability of ephemeris information transmission methods provided in related technologies.

[0065] Optionally, the base station includes: a base station centralization unit, which, in step S12, receives a first response message returned by the core network device based on the first request message, including:

[0066] Using the base station central unit, the first response message returned by the core network equipment based on the first request message is received.

[0067] The Centralized Unit (CU) mentioned above is a key network entity in 5G RAN, architecturally corresponding to the Distributed Unit (DU). Its main responsibility is to handle non-real-time radio higher-layer protocol stack functions. Specifically, these functions include, but are not limited to, Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), and Packet Data Convergence Protocol (PDCP). Furthermore, the CU is also responsible for interface interactions with core network equipment, such as communicating with the AMF and SMF via the NG interface, and exchanging information with the DU via the F1 interface.

[0068] Specifically, the design concept of the base station CU is to separate processing power from traditional base stations and centralize it in data centers or cloud platforms to achieve more efficient and economical network operation. This centralized processing approach not only reduces the computational requirements of base station DUs, but also allows the base station CU to share resources among different base station DUs, enabling dynamic optimization and deployment of network functions, thereby reducing the overall network maintenance cost and improving resource utilization efficiency.

[0069] Specifically, in a 5G NTN scenario, the base station CU, as part of the base station, can receive ephemeris information from core network equipment and transmit it to the relevant base station DU to ensure that the base station can accurately handle satellite communication-related functions. In this embodiment of the invention, the base station CU, through optimized signaling procedures, can more effectively manage the updating and broadcasting of ephemeris information, thereby improving the performance and reliability of the entire network.

[0070] For example, when the ephemeris information changes, the base station CU can quickly and accurately transmit the updated ephemeris information to the base station DU, thereby realizing real-time broadcasting of ephemeris information, enhancing beam management and switching capabilities in satellite communication, improving timing synchronization accuracy, and better performing user positioning and anti-Doppler frequency shift processing.

[0071] Based on the above optional embodiments, by utilizing the base station CU to receive the first response message returned by the core network equipment based on the first request message, efficient and accurate transmission of ephemeris information can be achieved. This ensures that the base station CU and its subordinate base stations DU acquire ephemeris data in a timely manner, thereby optimizing beam management, improving positioning accuracy, and enhancing the overall robustness and reliability of the system. Furthermore, the ephemeris information transmission process is implemented simply by expanding the signaling content within the existing protocol framework, without requiring significant hardware modifications to the base station CU or core network equipment, thus reducing implementation costs and simplifying maintenance procedures.

[0072] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes:

[0073] In the base station central unit, ephemeris information of one or more cells is stored locally.

[0074] Specifically, storing ephemeris information for one or more cells locally in the base station CU enhances the efficiency of ephemeris information acquisition and reduces frequent requests to core network equipment, thereby improving the performance and stability of the NTN. Specifically, when the base station CU receives ephemeris information from the core network equipment for the first time, it can store the ephemeris information in a local database for subsequent use.

[0075] For example, when storing ephemeris information, the base station CU can create an independent ephemeris information entry for each cell. This entry includes the satellite identifier corresponding to the cell, ephemeris data (including the satellite's precise position, velocity, and time information), and the validity of the ephemeris information. Specifically, the validity of ephemeris information is typically based on a timestamp; that is, the ephemeris information is considered valid if the deviation from the current time is within a predetermined threshold range. Once it detects that the ephemeris information is about to expire or receives updated ephemeris information from the core network equipment, the base station CU will immediately update its local database to ensure that the ephemeris data provided to the base station DU and terminals is up-to-date.

[0076] For example, to facilitate rapid retrieval and updating of ephemeris information, the ephemeris information database in the base station CU can be designed with a highly accessible and maintainable structure. For instance, hash tables or database indexing techniques can be used to quickly locate and update the ephemeris information of a specific cell based on satellite identifiers or cell identifiers.

[0077] Based on the above optional embodiments, storing ephemeris information of one or more cells locally in the base station CU can improve the response speed of ephemeris information, reduce network transmission latency, enhance the base station's ability to access ephemeris information in real time, thereby improving communication quality and user experience.

[0078] Optionally, the base station further includes: a base station distribution unit; the ephemeris information transmission method in this embodiment of the invention further includes:

[0079] Step S111: The base station central unit receives a second request message from the base station distribution unit, wherein the second request message is used to establish a communication link between the base station central unit and the base station distribution unit.

[0080] Step S112: The base station central unit returns a second response message corresponding to the second request message to the base station distribution unit. The information carried in the second response message includes: ephemeris information of one or more cells.

[0081] The aforementioned base station distribution unit is called a base station (DU). Specifically, the base station DU is responsible for handling physical layer functions directly related to wireless signals, including but not limited to signal modulation and demodulation, channel coding and decoding, digital signal processing, RF interface management, and real-time wireless signal transmission and reception with terminal devices. DUs are typically deployed close to the RF unit to reduce RF signal loss during transmission and improve signal quality and transmission efficiency.

[0082] The second request message refers to the F1 SETUP REQUEST sent by the base station DU to the base station CU. It is a communication request initiated by the base station DU during the establishment of the F1 interface link. Specifically, when the base station DU needs to establish an F1 interface link with the base station CU, it sends an F1 SETUP REQUEST. This message contains the base station DU's basic configuration information, capability information, and required cell information, so that the base station CU can understand the relevant attributes and requirements of the base station DU.

[0083] After receiving the F1 SETUP REQUEST, the base station CU responds to the base station DU with a second response message, namely the F1 SETUPRESPONSE. Specifically, the base station CU can carry ephemeris information of one or more cells in the F1 SETUP RESPONSE, so that the ephemeris information can be directly transmitted to the base station DU at the beginning of the communication link between the base station CU and the base station DU, thereby ensuring the timeliness and accuracy of the ephemeris information.

[0084] Based on the above steps S111 to S112, carrying ephemeris information in F1 SETUP RESPONSE not only simplifies the initial transmission process of ephemeris information, but also improves the transmission efficiency of ephemeris information and reduces unnecessary signaling interactions. This allows the communication link between base station CU and base station DU to have complete ephemeris information in the early stage of establishment, which is conducive to base station DU entering normal working state more quickly and providing effective wireless communication services.

[0085] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes:

[0086] Step S121: Receive a first configuration update message from the core network device, wherein the first configuration update message is used to update the configuration information between the base station and the core network device, and the information carried in the first configuration update message includes: updated ephemeris information;

[0087] Step S122: Broadcast the updated ephemeris information to the terminal through the specified system information block.

[0088] The aforementioned first configuration update message (AMF CONFIGURATION UPDATE) is a control plane message transmitted through the NG interface defined by 3GPP. It is primarily used by core network equipment to modify or update base station configuration parameters, ensuring that the base station can adjust its operating status in a timely manner to adapt to changes in network requirements. Specifically, the first configuration update message includes not only regular configuration update data but also the latest satellite ephemeris data, used to guide the base station in performing accurate time and location synchronization for the terminal's satellite communication services.

[0089] For example, to ensure the timely update and accuracy of ephemeris information, a periodic or event-triggered approach can be adopted. Specifically, the core network device can be configured with a timer to periodically check whether the information in the ephemeris database has been updated. When the timer expires or a change in ephemeris information is detected at any time, regardless of the current period status, the core network device can immediately send the latest locally stored ephemeris information to the base station to ensure the timeliness and reliability of the ephemeris information. During the real-time update process, the core network device can use the AMF CONFIGURATION UPDATE message to encapsulate the latest ephemeris information and transmit it to the base station. The message contains the updated ephemeris data, ensuring that the base station can receive and store the latest and most accurate ephemeris information, and then broadcast it to the terminal to support the efficient operation of the NTN system. By adopting the above mechanism, the core network device can transmit the update of ephemeris information to the entire network in the first instance, thereby reducing potential functional problems caused by ephemeris information delays, and thus improving the robustness and stability of the entire NTN system.

[0090] For example, the specified system information block mentioned above can be SIB19. SIB19 is a system information block in the 3GPP NR system specifically used for broadcasting ephemeris information. Through SIB19, the base station can efficiently and promptly broadcast the ephemeris information received from the core network equipment to all terminal devices within its coverage area, ensuring that each terminal can obtain the latest ephemeris information, thereby improving the positioning accuracy, latency compensation capability, and handover efficiency of the entire NTN system. The design of the above broadcast mechanism fully utilizes the broadcast characteristics of the existing 5G NR system, avoiding the additional overhead of terminal devices needing to request ephemeris information separately, thus improving the propagation efficiency and accuracy of ephemeris information.

[0091] Based on steps S121 to S122 above, receiving the first configuration update message from the core network equipment and then broadcasting the updated ephemeris information to the terminal through a specified system information block ensures that the ephemeris information received by the terminal is up-to-date and accurate. This improves the positioning accuracy and synchronization stability of satellite communication, enhancing the robustness and reliability of the system. This process allows the base station to update and broadcast ephemeris information in real time without additional hardware, reducing the cost and complexity of ephemeris information maintenance, while also improving the overall performance and user experience of the NTN system. Furthermore, through the centralized management and updating of ephemeris information by the core network equipment, the base station can effectively respond to changes in ephemeris information, ensuring that all terminals can obtain correct ephemeris data at all times.

[0092] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes:

[0093] Step S131: Receive the first configuration update message from the core network equipment through the base station central unit;

[0094] Step S132: Send a second configuration update message to the base station distribution unit through the base station central unit. The second configuration update message is used to update the configuration information between the base station central unit and the base station distribution unit. The information carried in the second configuration update message includes the updated ephemeris information.

[0095] The aforementioned second configuration update message refers to the GNB-CU CONFIGURATION UPDATE sent by the base station CU to the base station DU after receiving the first configuration update message from the core network equipment. This message contains updated ephemeris information, which is used to synchronize and update the ephemeris data stored in the base station DU, ensuring that the base station DU can grasp the latest position, velocity and time information of the satellite in a timely and accurate manner, thereby optimizing its service quality and performance for terminals.

[0096] Specifically, when the core network equipment detects that ephemeris information needs to be updated, it can send an AMF CONFIGURATION UPDATE message to the base station CU via the NG interface. This message not only contains the updated ephemeris information but can also carry an update identifier and a message sequence number to ensure the uniqueness of the information. After receiving this message, the base station CU can analyze the differences from the currently stored ephemeris information through its built-in logical decision module, identify which base station DUs and cells need to receive the update, and based on geographical location and coverage, encapsulate the ephemeris information and other necessary configuration parameters such as spectrum allocation and power control into the GNB-CU CONFIGURATION UPDATE message. Then, it sends the GNB-CU CONFIGURATION UPDATE message to the designated base station DU via the F1 interface.

[0097] For example, after receiving the GNB-CU CONFIGURATION UPDATE, the base station DU immediately updates the ephemeris data stored internally and sends a confirmation message back to the base station CU, forming a closed-loop update mechanism. During this process, the base station CU also has anomaly handling capabilities, such as automatically retransmitting when message transmission fails, or requesting the core network equipment to retransmit when ephemeris data verification fails, thereby ensuring the robustness and reliability of ephemeris information transmission.

[0098] Based on the above steps S131 to S132, the base station CU receives the first configuration update message from the core network equipment, and then sends the second configuration update message to the base station DU through the base station CU. This enables efficient synchronization and distribution of ephemeris information and other key configuration parameters, ensuring the communication quality and positioning accuracy between the terminal equipment and the satellite, while reducing the network burden and improving the overall robustness and reliability of the system.

[0099] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes:

[0100] Step S1411: Receive a third configuration update message from the base station distribution unit through the base station central unit. The information carried in the third configuration update message includes: updated cell information.

[0101] Step S1412: Send a fourth configuration update message to the core network equipment through the base station central unit. The information carried in the fourth configuration update message includes: the updated cell information.

[0102] Step S1413: The base station central unit receives a first update response message returned by the core network equipment based on the fourth configuration update message. The information carried in the first update response message includes the updated ephemeris information.

[0103] Step S1414: The base station central unit returns a second update response message to the base station distribution unit, wherein the information carried in the second update response message includes the updated ephemeris information.

[0104] The aforementioned third configuration update message refers to the GNB-DU CONFIGURATIONUPDATE sent by the base station DU to the base station CU. This message contains updated cell information on the base station DU side, such as adjustments to the geographical coverage of the cell, changes in frequency configuration, and changes in transmit power thresholds, so that the base station CU can fully understand the dynamic changes at the network edge and provide a basis for subsequent ephemeris information updates.

[0105] The aforementioned fourth configuration update message refers to the RAN CONFIGURATION UPDATE sent by the base station CU to the core network equipment based on the received third configuration update message. Its purpose is to notify the core network equipment of the cell configuration changes of the base station DU, prompting the core network equipment to recalculate and adjust the ephemeris information according to the latest cell information, so as to ensure that the ephemeris information matches the actual situation of the cell.

[0106] The aforementioned first update response message refers to the RAN CONFIGURATIONUPDATE ACKNOWLEDGE returned by the core network equipment to the base station CU. This message carries the ephemeris information recalculated and adjusted according to the fourth configuration update message in response to the request of the base station CU, thereby realizing the update and synchronization of the ephemeris information.

[0107] The aforementioned second update response message refers to the GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE message sent by the base station CU to the base station DU after receiving the first update response message. This message contains updated ephemeris information and is used to quickly synchronize the latest ephemeris data to the base station DU, ensuring that the base station DU can perform related functions such as beam management, timing synchronization, and user positioning based on the latest ephemeris information, thereby optimizing the communication experience and service quality of terminal devices.

[0108] Specifically, in a 5G NTN system, there is a close need for data exchange and configuration synchronization between the base station DU and the base station CU. Assuming that the cell configuration information on the base station DU changes due to environmental factors, equipment upgrades, or the need to optimize scheduling strategies, the base station DU can send a GNB-DU CONFIGURATION UPDATE message to the base station CU. This message carries updated cell information, including but not limited to key parameters such as cell ID, frequency configuration, transmit power threshold, and carrier aggregation status. Upon receiving the GNB-DU CONFIGURATION UPDATE, the base station CU can parse the updated cell information and assess the impact of these changes on the entire system, particularly the requirements for ephemeris information transmission and usage. Based on this assessment process, the base station CU can send a RAN CONFIGURATION UPDATE message to the core network equipment to reflect the cell configuration changes of the base station DU. The RAN CONFIGURATION UPDATE also includes updated cell information, enabling the core network equipment to promptly understand the dynamic changes at the network edge and adjust the ephemeris information transmission strategy and data content accordingly.

[0109] Furthermore, upon receiving the RAN CONFIGURATION UPDATE, the core network equipment can recalculate and generate the corresponding ephemeris information based on the updated cell information, combined with the latest satellite status and constellation layout. Subsequently, the core network equipment can return a RAN CONFIGURATION UPDATE ACKNOWLEDGE message based on the RAN CONFIGURATION UPDATE, carrying the updated ephemeris information for the cell configuration, thus ensuring the accuracy and timeliness of the ephemeris data. Finally, upon receiving the RAN CONFIGURATION UPDATE ACKNOWLEDGE, the base station CU will immediately send a GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE to the base station DU, quickly synchronizing the updated ephemeris information back to the base station DU.

[0110] Based on steps S1411 to S1414 above, the aforementioned bidirectional configuration update and ephemeris information synchronization mechanism not only ensures the real-time performance and accuracy of ephemeris information in the 5G NTN system, but also enables the entire network to maintain efficient and stable data transmission and terminal service quality when cell configurations change. Through these steps, the system can respond promptly to changes in cell configurations, dynamically adjust the transmission of ephemeris information, and ensure that terminal devices obtain the latest and most suitable ephemeris data. This enables optimal beam management and handover control in satellite communication, as well as improved user positioning accuracy and resistance to Doppler shift.

[0111] Optionally, the ephemeris information transmission method in this embodiment of the invention further includes:

[0112] Step S1421: Send a fifth configuration update message to the core network equipment through the base station central unit. The information carried in the fifth configuration update message includes: the updated cell information.

[0113] Step S1422: The base station central unit receives a third update response message returned by the core network equipment based on the fifth configuration update message. The information carried in the third update response message includes the updated ephemeris information.

[0114] Step S1423: A sixth configuration update message is sent from the base station central unit to the base station distribution unit. The sixth configuration update message is used to update the configuration information between the base station central unit and the base station distribution unit. The information carried in the sixth configuration update message includes the updated ephemeris information.

[0115] Step S1424: The base station central unit receives the fourth update response message returned by the base station distribution unit based on the sixth configuration update message.

[0116] For example, suppose the base station CU detects a change in the geographical coverage of a cell. In this case, the base station CU can proactively update its ephemeris information by sending a fifth configuration update message to the core network equipment, without waiting for a configuration update request from the base station DU. Upon receiving the fifth configuration update message, the core network equipment can recalculate the ephemeris information based on the current satellite status and constellation layout, and transmit the updated ephemeris information back to the base station CU via a third update response message. Furthermore, the base station CU can synchronize the latest ephemeris data to the base station DU via a sixth configuration update message. Upon receiving the sixth configuration update message, the base station DU can perform corresponding configuration updates and adjustments based on the updated ephemeris information carried within. Specifically, the base station DU can update its internally stored ephemeris data to reflect the latest satellite position, velocity, and time information, and then confirm to the base station CU via a fourth update response message that it has successfully received and processed the ephemeris information in the sixth configuration update message. This ensures that the entire system can quickly respond to minor changes in cell configuration, maintain the accuracy of ephemeris information, and thus improve service quality and user experience.

[0117] Based on the above steps S1421 to S1423, the transmission process of ephemeris information between base station CU and base station DU can be simplified, making the management of ephemeris data more centralized, thereby reducing maintenance costs.

[0118] Figure 2 This is a flowchart of another ephemeris information transmission method according to one embodiment of the present invention, such as... Figure 2As shown, the method includes the following steps:

[0119] Step S21: Receive a first request message from the base station. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0120] Step S22: Based on the first request message, return a first response message to the base station. The information carried in the first response message includes: ephemeris information of one or more cells. The base station is used to broadcast the ephemeris information of one or more cells to the terminal through a specified system information block.

[0121] The aforementioned first request message refers to the message initiated by the base station when establishing a communication link between the base station and the core network equipment. Specifically, the aforementioned first request message can be the NG SETUP REQUEST in the 3GPP 38.413 protocol. The NGSETUP REQUEST is the initial message used by the base station and the AMF in the 3GPP NR system to establish an NG interface communication link. It is used to inform the core network equipment of the existence of the base station and request the establishment of the necessary communication link for subsequent data exchange and control command transmission.

[0122] The aforementioned cell information refers to the relevant information after the geographical area served by the base station is divided into one or more cells. Specifically, the aforementioned cell information includes, but is not limited to, the cell's unique identifier, the cell's geographical location information (such as latitude and longitude coordinates), the cell's coverage area, the cell's frequency band information, the cell's bandwidth configuration, the cell's carrier configuration, and the cell's current status (such as idle, busy, faulty, etc.).

[0123] The aforementioned first response message refers to the NG SETUP RESPONSE sent by the AMF in response to the base station's request after the base station sends an NG SETUP REQUEST to establish a communication link with the AMF. The NG SETUP RESPONSE is part of the 3GPP 38.413 protocol and is used to establish an NG interface link between the base station and the AMF, confirm the base station's request, and carry ephemeris information for one or more cells.

[0124] The ephemeris information mentioned above, or satellite ephemeris, is a set of data describing a satellite's precise position, velocity, and time parameters in space, and is crucial for applications such as satellite communication, navigation, and remote sensing. Specifically, ephemeris information includes, but is not limited to, the following key parameters: satellite nadir position, satellite orbital parameters, satellite velocity parameters, satellite clock parameters, and satellite health status. The satellite nadir position is the point directly below the Earth's surface, used to determine the satellite's coverage area and geographical location. Satellite orbital parameters include, but are not limited to, the semi-major axis of the orbit, orbital eccentricity, orbital inclination, right ascension of the ascending node, and perigee distance, used to calculate the satellite's instantaneous position. Satellite velocity parameters include, but are not limited to, the satellite's radial and tangential velocities, used to accurately predict changes in satellite position. Satellite clock parameters include, but are not limited to, clock skew and clock drift, used to correct satellite signal transmission time and ensure accurate time synchronization. Satellite health status indicates whether the satellite is functioning properly.

[0125] Based on steps S21 to S22 above, by directly carrying ephemeris information in the NG SETUP RESPONSE, the base station can immediately obtain the required ephemeris information without additional requests or waiting, thereby improving the efficiency of ephemeris information transmission and reducing errors during transmission, thus improving the accuracy of the ephemeris information. Secondly, the direct transmission of ephemeris information reduces the need for transmission through multiple network nodes, lowering the risk of data loss or delay, thereby enhancing the stability and reliability of the entire communication network.

[0126] Optionally, another method for transmitting ephemeris information in this embodiment of the invention further includes:

[0127] Step S211: Construct a global view based on cell information, wherein the global view is used to describe the constellation status of the entire network and the status of base station cells;

[0128] Step S212: Based on the global view, customize ephemeris information for one or more cells for the base station.

[0129] The aforementioned constellation status refers to the collection of the current position, velocity, attitude, and health status of all satellites in the entire satellite network. This includes, but is not limited to, key indicators such as each satellite's orbital parameters relative to Earth, relative positions between satellites, pointing angle, operating mode (e.g., whether it is in normal operation or maintenance), and remaining fuel. The construction of the constellation status relies on satellite telemetry data collected and updated regularly by ground control stations, as well as ground-aided calculations. This constitutes a crucial basis for core network equipment decision-making and the generation of ephemeris information, ensuring the accuracy and timeliness of the ephemeris data.

[0130] The aforementioned base station cell status refers to an overview of the operating status and technical parameters of each cell within the coverage area of ​​all base stations, including but not limited to cell ID, geographical coverage, frequency configuration, transmit power level, user load, number of connected terminals, uplink and downlink quality, and inter-cell interference. Real-time monitoring of base station cell status helps core network equipment understand the dynamic needs of the network edge, thereby accurately determining the most suitable ephemeris information for each base station or its cell. This improves the efficiency and relevance of ephemeris transmission in the NTN, ensuring that terminal equipment can perform satellite communication-related operations based on optimized ephemeris data, such as beamforming, handover management, and timed synchronization, thereby enhancing the overall system's communication quality and user experience.

[0131] For example, in a 5G NTN system with multiple cells, each base station (DU) periodically reports the latest information of its respective cell, including but not limited to cell ID, geographical coverage area, frequency resource allocation, number of user connections, link quality, and any configuration changes. Simultaneously, ground control stations continuously monitor and upload the overall constellation status, i.e., the orbital parameters, velocity, azimuth, health status, and remaining fuel of all satellites. Based on this, core network equipment can receive and process the aforementioned cell information and constellation status to construct a global view. Specifically, core network equipment can cross-reference the aggregated cell information with constellation layout data to assess the correlation between each cell and the satellite network, determine which satellites currently cover which cells, and anticipate potential coverage adjustments due to future orbital changes. Furthermore, core network equipment can analyze the load and link quality of different cells, combined with the satellite health status and remaining resources, to predict the best possible satellite-cell pairing schemes, as well as the optimal spectrum allocation and power settings.

[0132] For example, based on a global view, core network equipment can optimize ephemeris information transmission strategies according to the needs of different cells and the actual situation of the satellite network. For instance, for cells with wide geographical coverage and heavy user load, core network equipment can prioritize allocating more satellite resources to the cell, while increasing the transmission frequency and ephemeris information update rate to support high data rate and low latency communication services. For remote areas or low-load cells, a more economical ephemeris data transmission scheme can be adopted to balance the allocation of network resources and avoid excessive bandwidth consumption.

[0133] Based on steps S211 to S212 above, a global view is constructed based on cell information. Then, based on the global view, ephemeris information for one or more cells is customized for the base station. This allows the ephemeris information transmission system to dynamically adjust the content and update strategy of the ephemeris information according to real-time network conditions and user needs. This ensures that the ephemeris data received by each cell is customized for its specific conditions, thereby achieving optimal performance in key communication functions such as beamforming, timing synchronization, and user positioning. It also reduces unnecessary resource consumption, enhances the network's adaptability and stability in complex environments, and provides end users with a higher quality and more reliable satellite communication experience.

[0134] Optionally, another method for transmitting ephemeris information in this embodiment of the invention further includes:

[0135] The response determines that the ephemeris information of one or more cells has been updated based on the global view, and sends a first configuration update message to the base station. The first configuration update message is used to update the configuration information between the base station and the core network equipment. The information carried in the first configuration update message includes the updated ephemeris information. The base station is also used to broadcast the updated ephemeris information to the terminal through a specified system information block.

[0136] The aforementioned first configuration update message (AMF CONFIGURATION UPDATE) is a control plane message transmitted through the NG interface defined by 3GPP. It is primarily used by core network equipment to modify or update base station configuration parameters, ensuring that the base station can adjust its operating status in a timely manner to adapt to changes in network requirements. Specifically, the first configuration update message includes not only regular configuration update data but also the latest satellite ephemeris data, used to guide the base station in performing accurate time and location synchronization for the terminal's satellite communication services.

[0137] For example, when a core network device detects that the ephemeris information of one or more cells needs to be updated based on a global view, it generates and sends an AMF CONFIGURATION UPDATE to the corresponding base station. This aims to synchronize the latest ephemeris information, ensuring that the base station can perform its communication functions based on the most accurate satellite position, velocity, and time data. In addition to the updated ephemeris information, the AMF CONFIGURATION UPDATE may also include updates to other satellite communication-related configuration parameters, such as frequency adjustments and power control thresholds, so that the base station can comprehensively optimize its satellite communication services. Upon receiving the AMF CONFIGURATION UPDATE, the base station can immediately update its internally stored ephemeris information and broadcast the updated ephemeris information via SIB19 to all terminal devices within its coverage area.

[0138] Based on the above optional embodiments, when the ephemeris information of one or more cells is updated based on the global view, a first configuration update message is sent to the base station. This ensures that the base station can obtain the latest ephemeris data in a timely manner, thereby quickly adjusting its communication parameters and functions to cope with changes in satellite position, velocity, or time parameters. This not only enhances the synchronization between the base station and the satellite, but also improves the robustness and reliability of the NTN.

[0139] Optionally, another method for transmitting ephemeris information in this embodiment of the invention further includes:

[0140] Step S221: Receive a fourth configuration update message from the base station, wherein the information carried in the fourth configuration update message includes: updated cell information;

[0141] Step S222: Return a first update response message based on the fourth configuration update message, wherein the information carried in the first update response message includes: the updated ephemeris information.

[0142] The aforementioned fourth configuration update message refers to the RAN CONFIGURATION UPDATE sent by the base station CU to the core network equipment based on the received third configuration update message. Its purpose is to notify the core network equipment of the cell configuration changes of the base station DU, prompting the core network equipment to recalculate and adjust the ephemeris information according to the latest cell information, so as to ensure that the ephemeris information matches the actual situation of the cell.

[0143] The aforementioned first update response message refers to the RAN CONFIGURATIONUPDATE ACKNOWLEDGE returned by the core network equipment to the base station CU. This message carries the ephemeris information recalculated and adjusted according to the fourth configuration update message in response to the request of the base station CU, thereby realizing the update and synchronization of the ephemeris information.

[0144] Based on the above steps S321 to S322, receiving the fourth configuration update message from the base station and then returning the first update response message based on the fourth configuration update message can realize dynamic configuration synchronization between the core network equipment and the base station, ensure a high degree of matching between network parameters and the actual operating environment, thereby improving the update efficiency of ephemeris information, reducing redundant transmission and resource waste caused by static configuration, and enhancing network adaptability.

[0145] Optionally, another ephemeris information transmission method in this embodiment of the invention further includes: receiving a fifth configuration update message from a base station, wherein the information carried in the fifth configuration update message includes: updated cell information; and returning a third update response message based on the fifth configuration update message, wherein the information carried in the third update response message includes: updated ephemeris information.

[0146] Figure 3 This is a schematic diagram of an ephemeris information transmission method according to one embodiment of the present invention, as shown below. Figure 3 As shown, the first request message is NG SETUP REQUEST, the first response message is NG SETUP RESPONSE, the second request message is F1 SETUP REQUEST, the second response message is F1 SETUP RESPONSE, the first configuration update message is AMFCONFIGURATION UPDATE, the first configuration response message is AMF CONFIGURATION UPDATE ACKNOWLEDGE, the second configuration update message is GNB-CU CONFIGURATION UPDATE, the second configuration response message is GNB-CUCONFIGURATION UPDATE ACKNOWLEDGE, the third configuration update message is GNB-DU CONFIGURATION UPDATE, the fourth configuration update message is RAN CONFIGURATION UPDATE, the first update response message is RANCONFIGURATION UPDATE ACKNOWLEDGE, and the second update response message is GNB-DU CONFIGURATION UPDATE ACKNOWLEDGE.

[0147] Specifically, the fifth configuration update message is a message proactively sent by the base station CU to the core network equipment to request updated ephemeris information without waiting for a configuration update request from the base station DU. Upon receiving the fifth configuration update message, the core network equipment can recalculate the ephemeris information based on the current satellite status and constellation layout, and return the updated ephemeris information to the base station CU via the third update response message. After receiving the third update response message, the base station CU can transmit the updated ephemeris information to the base station DU via the sixth configuration update message, enabling the base station DU to perform corresponding configuration updates and adjustments based on the updated ephemeris information. The base station DU then confirms to the base station CU via the fourth update response message that it has successfully received and processed the ephemeris information in the sixth configuration update message.

[0148] Specifically, NG SETUP REQUEST and NG SETUP RESPONSE are used to establish NG interface links between the base station and core network equipment. The NG SETUP REQUEST is issued by the base station, requesting the core network equipment to establish a connection; it contains the base station's configuration information, such as cell NGI information. The NG SETUP RESPONSE is the core network equipment's response to the base station's request, containing ephemeris information for directly transmitting ephemeris data to the base station.

[0149] The F1 SETUP REQUEST / F1 SETUP RESPONSE messages are used to establish an F1 interface link between the base station CU and the base station DU. When the base station DU sends an F1 SETUP REQUEST message to the base station CU to request a connection, the base station CU includes ephemeris information in the F1 SETUP RESPONSE message. This allows the base station CU to transmit ephemeris data from the base station CU to the base station DU, ensuring that the base station DU also receives the latest ephemeris information.

[0150] During ephemeris information transmission, if the ephemeris information is updated, the core network equipment will transmit the updated ephemeris information to the base station via an AMFCONFIGURATION UPDATE message to maintain the base station's ephemeris information in the latest state. Sending an AMF CONFIGURATION UPDATE ACKNOWLEDGE message is to confirm that the base station has successfully received the ephemeris information update from the AMF CONFIGURATION UPDATE message and has applied the updated ephemeris information to the corresponding cell.

[0151] The GNB-CU CONFIGURATION UPDATE message is used to transmit ephemeris information and other updates to the base station DU when the core network equipment or base station CU updates its configuration. The GNB-CU CONFIGURATION UPDATE ACKNOWLEDGE message is a response sent by the base station DU to the base station CU, confirming that the base station DU has successfully received and applied the configuration update from the base station CU. The GNB-DU CONFIGURATION UPDATE message is used to notify the base station CU and ultimately the core network when the base station DU's configuration information changes.

[0152] RAN CONFIGURATION UPDATE / RAN CONFIGURATION UPDATE ACKNOWLEDGE are used to update the RAN configuration between the base station and core network equipment. When the base station's configuration information changes, it notifies the core network equipment via the RANCONFIGURATION UPDATE message. The core network equipment acknowledges the change and returns a RAN CONFIGURATION UPDATE ACKNOWLEDGE. During this process, the core network equipment can update and transmit ephemeris information to the base station, ensuring information synchronization and consistency.

[0153] For example, Figure 3The system information block in the system information block can be SIB19. After receiving the ephemeris information, the base station DU can broadcast the ephemeris information to all terminals through SIB19, ensuring that the terminals can obtain the satellite's accurate position, velocity, and time data, thereby realizing various NTN features, such as beam management, timing synchronization, and user positioning.

[0154] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0155] This invention also provides an ephemeris information transmission device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0156] Figure 4 This is a structural block diagram of an ephemeris information transmission device according to one embodiment of the present invention, such as... Figure 4 As shown, the device includes:

[0157] The sending module 401 is used to send a first request message to the core network equipment. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0158] The first receiving module 402 is used to receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells;

[0159] The broadcast module 403 is used to broadcast ephemeris information of one or more cells to the terminal through a specified system information block.

[0160] Figure 5 This is a structural block diagram of another ephemeris information transmission device according to one embodiment of the present invention, such as... Figure 5 As shown, the device includes:

[0161] The second receiving module 501 is used to receive a first request message from the base station. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0162] The return module 502 is used to return a first response message to the base station based on the first request message. The information carried in the first response message includes: ephemeris information of one or more cells. The base station is used to broadcast the ephemeris information of one or more cells to the terminal through a specified system information block.

[0163] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0164] According to another aspect of the present invention, an ephemeris information transmission system is also provided, comprising at least: a core network device, a base station, and a terminal, wherein the base station is used to execute the ephemeris information transmission method in the embodiments of the present invention, and the core network device is used to execute another ephemeris information transmission method in the embodiments of the present invention.

[0165] According to another aspect of the present invention, a base station device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the ephemeris information transmission method of the present invention during runtime.

[0166] According to another aspect of the present invention, a core network device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes another ephemeris information transmission method according to the present invention during runtime.

[0167] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the storage medium is located to execute the ephemeris information transmission method of the present invention.

[0168] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0169] Step S11: Send a first request message to the core network equipment. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0170] Step S12: Receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells;

[0171] Step S13: Broadcast ephemeris information of one or more cells to the terminal through a specified system information block.

[0172] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0173] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the ephemeris information transmission method of the present invention.

[0174] Optionally, in this embodiment, the above-mentioned computer program product can be configured as a computer program that performs the following steps:

[0175] Step S11: Send a first request message to the core network equipment. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0176] Step S12: Receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells;

[0177] Step S13: Broadcast ephemeris information of one or more cells to the terminal through a specified system information block.

[0178] According to another aspect of the present invention, a chip system is also provided, comprising: a processor for calling and running a computer program from a memory, such that a communication device equipped with the chip system performs the ephemeris information transmission method of the present invention.

[0179] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0180] Step S11: Send a first request message to the core network equipment. The first request message is used to establish a communication link between the base station and the core network equipment. The information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells.

[0181] Step S12: Receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of one or more cells;

[0182] Step S13: Broadcast ephemeris information of one or more cells to the terminal through a specified system information block.

[0183] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0184] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0185] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection can be through some interfaces; the indirect coupling or communication connection of units or modules can be electrical or other forms.

[0186] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0187] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0188] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0189] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for transmitting ephemeris information, characterized in that, include: Send a first request message to the core network equipment, wherein the first request message is used to establish a communication link between the base station and the core network equipment, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; Receive a first response message returned by the core network device based on the first request message, wherein the information carried in the first response message includes: ephemeris information of the one or more cells; The system broadcasts ephemeris information of one or more cells to the terminal via a designated system information block.

2. The method for transmitting ephemeris information according to claim 1, characterized in that, The base station includes: a base station centralization unit, which receives the first response message returned by the core network device based on the first request message, including: The base station centralization unit receives the first response message returned by the core network device based on the first request message.

3. The method for transmitting ephemeris information according to claim 2, characterized in that, The ephemeris information transmission method further includes: In the base station centralization unit, the ephemeris information of the one or more cells is stored locally.

4. The method for transmitting ephemeris information according to claim 2, characterized in that, The base station further includes: a base station distribution unit, and the ephemeris information transmission method further includes: The base station centralization unit receives a second request message from the base station distribution unit, wherein the second request message is used to establish a communication link between the base station centralization unit and the base station distribution unit. The base station centralization unit returns a second response message corresponding to the second request message to the base station distribution unit, wherein the information carried in the second response message includes: ephemeris information of the one or more cells.

5. The method for transmitting ephemeris information according to claim 1, characterized in that, The ephemeris information transmission method further includes: Receive a first configuration update message from the core network device, wherein the first configuration update message is used to update the configuration information between the base station and the core network device, and the information carried in the first configuration update message includes: updated ephemeris information; The updated ephemeris information is broadcast to the terminal via the designated system information block.

6. The method for transmitting ephemeris information according to claim 5, characterized in that, The ephemeris information transmission method further includes: The base station central unit receives the first configuration update message from the core network equipment. The base station centralization unit sends a second configuration update message to the base station distribution unit. The second configuration update message is used to update the configuration information between the base station centralization unit and the base station distribution unit. The information carried in the second configuration update message includes the updated ephemeris information.

7. The method for transmitting ephemeris information according to claim 1, characterized in that, The ephemeris information transmission method further includes: The base station central unit receives a third configuration update message from the base station distribution unit, wherein the information carried in the third configuration update message includes: updated cell information; The base station centralization unit sends a fourth configuration update message to the core network equipment, wherein the information carried in the fourth configuration update message includes: the updated cell information; The base station centralization unit receives a first update response message returned by the core network device based on the fourth configuration update message, wherein the information carried in the first update response message includes: updated ephemeris information; The base station centralization unit returns a second update response message to the base station distribution unit, wherein the information carried in the second update response message includes the updated ephemeris information.

8. The method for transmitting ephemeris information according to claim 7, characterized in that, The ephemeris information transmission method further includes: The base station centralization unit sends a fifth configuration update message to the core network equipment, wherein the information carried in the fifth configuration update message includes: updated cell information; The base station centralization unit receives a third update response message returned by the core network equipment based on the fifth configuration update message, wherein the information carried in the third update response message includes: updated ephemeris information; The base station centralization unit sends a sixth configuration update message to the base station distribution unit. The sixth configuration update message is used to update the configuration information between the base station centralization unit and the base station distribution unit. The information carried in the sixth configuration update message includes the updated ephemeris information. The base station centralization unit receives the fourth update response message returned by the base station distribution unit based on the sixth configuration update message.

9. A method for transmitting ephemeris information, characterized in that, include: Receive a first request message from a base station, wherein the first request message is used to establish a communication link between the base station and the core network equipment, and the information carried in the first request message includes: cell information, which is obtained by dividing the geographical area served by the base station into one or more cells; Based on the first request message, a first response message is returned to the base station, wherein the information carried in the first response message includes: ephemeris information of the one or more cells, and the base station is used to broadcast the ephemeris information of the one or more cells to the terminal through a specified system information block.

10. The method for transmitting ephemeris information according to claim 9, characterized in that, The ephemeris information transmission method further includes: A global view is constructed based on the cell information, wherein the global view is used to describe the overall network constellation status and base station cell status; Based on the global view, the ephemeris information of one or more cells is customized for the base station.

11. The method for transmitting ephemeris information according to claim 10, characterized in that, The ephemeris information transmission method further includes: In response to the determination based on the global view that the ephemeris information of one or more cells has been updated, a first configuration update message is sent to the base station. The first configuration update message is used to update the configuration information between the base station and the core network equipment. The information carried in the first configuration update message includes the updated ephemeris information. The base station is also used to broadcast the updated ephemeris information to the terminal through the designated system information block.

12. The method for transmitting ephemeris information according to claim 9, characterized in that, The ephemeris information transmission method further includes: Receive a fourth configuration update message from the base station, wherein the information carried in the fourth configuration update message includes: updated cell information; The first update response message is returned based on the fourth configuration update message, wherein the information carried in the first update response message includes: the updated ephemeris information.

13. The method for transmitting ephemeris information according to claim 9, characterized in that, The ephemeris information transmission method further includes: Receive a fifth configuration update message from the base station, wherein the information carried in the fifth configuration update message includes: updated cell information; A third update response message is returned based on the fifth configuration update message, wherein the information carried in the third update response message includes: the updated ephemeris information.

14. A system for transmitting ephemeris information, characterized in that, At least including: The system includes core network equipment, a base station, and a terminal, wherein the base station is used to execute the ephemeris information transmission method according to any one of claims 1 to 8, and the core network equipment is used to execute the ephemeris information transmission method according to any one of claims 9 to 13.

15. A base station device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program executes the ephemeris information transmission method according to any one of claims 1 to 8 when it runs.

16. A core network device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program executes the ephemeris information transmission method according to any one of claims 9 to 13 when it runs.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the ephemeris information transmission method according to any one of claims 1 to 13.

18. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the ephemeris information transmission method according to any one of claims 1 to 13.

19. A chip system, characterized in that, include: A processor for retrieving and running a computer program from memory, causing a communication device equipped with the chip system to perform the ephemeris information transmission method as described in any one of claims 1 to 13.

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