Satellite communication method and system

Abstract

The invention discloses a satellite communication method and system. The method comprises the following steps: a geostationary orbit satellite system establishes radio resource control connection with a terminal; acquiring ephemeris information of the low-orbit earth satellite system through an inter-satellite link, and acquiring time or position-based measurement information reported by a terminal; according to the ephemeris information and / or the measurement information, determining whether to use the low-orbit earth satellite system to provide a communication service for the terminal; and establishing a communication link between the terminal and the low-orbit earth satellite system under the condition that the low-orbit earth satellite system is determined to provide the communication service for the terminal. The technical problem that a geostationary orbit satellite and a low-orbit earth satellite in a related satellite communication scheme are independent from each other, and the communication requirement of a user is difficult to meet is solved.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular, to a satellite communication method and system. Background Art

[0002] Research has shown that the land area accounts for only 6% of the earth's surface, which means that there are a large number of ocean areas on the earth that are not covered by mobile communications. In addition, due to the diversity of the land environment, many areas cannot set up mobile communication equipment, such as remote mountainous areas and deserts, resulting in many areas on land that are not covered by mobile communications. In addition, when natural disasters occur, the ground communication system is easily interrupted, which causes great difficulties for rescue work. In order to solve these problems, 3GPP proposed the 5G non-terrestrial network (NTN) technology. This technology uses satellite communications to provide network services to users on the ground, combining the advantages of traditional satellite communications and ground mobile communications, and can serve as an extension and supplement to the ground communication system. NTN technology is oriented to satellite communications. According to the height of the satellite and the ground, the satellite can be divided into low-orbit earth satellites, medium-orbit earth satellites and geostationary orbit satellites. Among them, the geostationary orbit satellite has an orbital altitude of 35,786 kilometers and has a wide field of view to the ground. The geostationary orbit satellite system has a high communication capacity and a low probability of switching, but the transmission delay is long, about 270 milliseconds. Low-orbit Earth satellites are mainly located at an altitude of 1,000 to 1,400 kilometers, with a small field of view of the earth. A large number of satellites need to be deployed to achieve global coverage. The communication capacity of the low-orbit Earth satellite system is relatively small. Due to the fast movement speed of the satellite, users on the ground switch frequently, but the transmission delay is relatively low, about 7 milliseconds.

[0003] Since the transmission time of geostationary orbit satellites and the frequent switching of low-orbit earth satellites will reduce user experience, it is particularly important to rationally utilize satellite resources and shorten data transmission time while ensuring a stable connection.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present application provide a satellite communication method and system to at least solve the technical problem that geostationary orbit satellites and low-orbit earth satellites in related satellite communication solutions are independent of each other and difficult to meet user communication needs.

[0006] According to one aspect of an embodiment of the present application, a satellite communication method is provided, which is applied to a geostationary orbit satellite system, including: establishing a wireless resource control connection with a terminal; obtaining ephemeris information of a low-orbit earth satellite system through an inter-satellite link, and obtaining time- or position-based measurement information reported by the terminal; determining whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; and establishing a communication link between the terminal and the low-orbit earth satellite system when it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal.

[0007] Optionally, establishing a wireless resource control connection with the terminal includes: receiving a wireless resource control establishment request message sent by the terminal; sending a wireless resource control establishment message to the terminal, wherein the wireless resource control establishment message includes resource configuration information for instructing the terminal to establish a wireless resource control connection; and receiving a wireless resource control establishment completion message sent by the terminal.

[0008] Optionally, determining whether to utilize a low-orbit Earth satellite system to provide communication services to the terminal is performed based on ephemeris information and / or measurement information, including: determining, based on the ephemeris information and / or measurement information, a service start time and a service duration at which the low-orbit Earth satellite system can provide communication services to the terminal; if the service duration is less than a first preset threshold, determining not to utilize the low-orbit Earth satellite system to provide communication services to the terminal; if the service duration is not less than the first preset threshold, determining to utilize the low-orbit Earth satellite system to provide communication services to the terminal.

[0009] Optionally, establishing a communication link between a terminal and a low-orbit earth satellite system includes: sending a secondary node addition request message to the low-orbit earth satellite system at a service start time; receiving a secondary node addition request confirmation message sent by the low-orbit earth satellite system; sending a wireless resource control reconfiguration message to the terminal, wherein the wireless resource control reconfiguration message is used to instruct the terminal to configure the low-orbit earth satellite system as a secondary node; receiving a wireless resource control reconfiguration completion message sent by the terminal; sending a secondary node reconfiguration completion message to the low-orbit earth satellite system; wherein the low-orbit earth satellite system is used to respond to the random access request of the terminal and establish a communication link with the terminal.

[0010] Optionally, establishing a communication link between a terminal and a low-orbit earth satellite system includes: sending a wireless resource control reconfiguration message to the terminal before a service start time, wherein the wireless resource control reconfiguration message includes secondary cell configuration information, and the secondary cell configuration information includes time-frequency information for instructing the terminal to perform time-frequency synchronization with the low-orbit earth satellite system; receiving a wireless resource control reconfiguration completion message sent by the terminal, wherein the secondary cell configured by the terminal is in an unactivated state; and sending a media access control control element for activating the secondary cell to the terminal at the service start time, wherein the terminal is configured to respond to the media access control control element, activate the secondary cell, and establish a communication link with the low-orbit earth satellite system.

[0011] Optionally, the geostationary orbit satellite system includes: a geostationary orbit satellite, a first ground base station or a first on-satellite base station corresponding to the geostationary orbit satellite; the low-orbit earth satellite system includes: a low-orbit earth satellite, a second ground base station or a second on-satellite base station corresponding to the low-orbit earth satellite.

[0012] Optionally, signaling is transmitted between the geostationary satellite system and the terminal; and data is transmitted between the low earth orbit satellite system and the terminal.

[0013] According to another aspect of an embodiment of the present application, a satellite communication system is also provided, including: a terminal, a geostationary orbit satellite system and a low-orbit earth satellite system, wherein the geostationary orbit satellite system is used to establish a wireless resource control connection with the terminal; obtain ephemeris information of the low-orbit earth satellite system through an inter-satellite link, and obtain time- or position-based measurement information reported by the terminal; determine whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; and establish a communication link between the terminal and the low-orbit earth satellite system when it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal.

[0014] According to another aspect of an embodiment of the present application, a computer program product is also provided, the computer program product comprising: a computer program, wherein the computer program implements the above-mentioned satellite communication method when executed by a processor.

[0015] According to another aspect of an embodiment of the present application, an electronic device is further provided, the electronic device comprising: a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the above-mentioned satellite communication method through the computer program.

[0016] In the embodiment of the present application, the geostationary orbit satellite system establishes a wireless resource control connection with the terminal; obtains the ephemeris information of the low-orbit earth satellite system through the inter-satellite link, and obtains the measurement information based on time or position reported by the terminal; determines whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; and establishes a communication link between the terminal and the low-orbit earth satellite system when it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal. Among them, the service capability of the low-orbit earth satellite system is evaluated through the ephemeris information and the measurement information reported by the terminal to determine whether to use it to provide communication services for the terminal. Once it is determined to use it to provide communication services for the terminal, the geostationary orbit satellite system will assist in establishing a communication link between the terminal and the low-orbit earth satellite system to ensure the efficiency and stability of data transmission, thereby solving the technical problem that the geostationary orbit satellite and the low-orbit earth satellite in the relevant satellite communication scheme are independent of each other and difficult to meet user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a schematic diagram of the structure of an optional satellite communication system according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a flow chart of an optional satellite communication system working in collaboration through a multi-connection mode according to an embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of a process of an optional satellite communication system working in collaboration through carrier aggregation according to an embodiment of the present application;

[0021] Figure 4 is a flowchart of an optional satellite communication method according to an embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of the structure of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Example 1

[0026] In order to solve the technical problem that geostationary orbit satellites and low-orbit earth satellites in related satellite communication solutions are independent of each other and difficult to meet user needs, the embodiment of the present application proposes a communication method in which a geostationary orbit satellite system and a low-orbit earth satellite system cooperate with each other, which can ensure a stable connection while improving the data transmission speed.

[0027] Specifically, the present application embodiment provides a satellite communication system, such as Figure 1 As shown, the system includes: a terminal 11, a geostationary orbit satellite system 12 and a low-orbit earth satellite system 13, wherein:

[0028] The geostationary orbit satellite system 12 is used to establish a wireless resource control connection with the terminal 11; obtain the ephemeris information of the low-orbit earth satellite system 13 through the inter-satellite link, and obtain the time-based or position-based measurement information reported by the terminal 11; determine whether to use the low-orbit earth satellite system 13 to provide communication services for the terminal 11 based on the ephemeris information and / or the measurement information; and establish a communication link between the terminal 11 and the low-orbit earth satellite system 13 when it is determined that the low-orbit earth satellite system 13 is used to provide communication services for the terminal.

[0029] The functions and interaction processes of each module of the satellite communication system are explained below in combination with the specific implementation process.

[0030] Optionally, the above-mentioned geostationary orbit satellite system includes a geostationary orbit satellite, a first ground base station or a first on-satellite base station corresponding to the geostationary orbit satellite; the low-orbit earth satellite system includes: a low-orbit earth satellite, a second ground base station or a second on-satellite base station corresponding to the low-orbit earth satellite.

[0031] Before the terminal starts data transmission, it needs to establish a stable connection with the geostationary satellite system. In order to ensure the establishment of the connection, it is necessary to configure appropriate wireless resources, including frequency, time resources, etc. After the connection is established, signaling can be transmitted through the geostationary satellite system to support subsequent communication configuration.

[0032] First, the terminal initiates the first step of the communication connection by sending a wireless resource control establishment request message to the geostationary orbit satellite system to request the establishment of a wireless resource control connection; the geostationary orbit satellite system receives the wireless resource control establishment request message sent by the terminal, and sends a wireless resource control establishment message to the terminal, wherein the wireless resource control establishment message includes resource configuration information for instructing the terminal to establish a wireless resource control connection, so that the terminal can correctly configure its wireless resources to prepare for subsequent data transmission; after receiving the wireless resource control establishment message, the terminal applies the resource configuration information therein to set up the wireless resources and prepare to establish a connection. After completing the resource configuration, the terminal sends a wireless resource control establishment completion message to the geostationary orbit satellite system to confirm that the terminal has completed the resource configuration and is ready for subsequent communication.

[0033] Optionally, after the terminal establishes an initial connection with the geostationary orbit satellite system, the geostationary orbit satellite system needs to first obtain corresponding information to determine whether the low-orbit earth satellite system can provide communication services for the terminal. The information can be the ephemeris information of the low-orbit earth satellite system obtained through the inter-satellite link, or it can be time- or position-based measurement information reported by the terminal, or it can be a comprehensive judgment based on the two.

[0034] The geostationary orbit satellite system determines the service start time and service duration of the low-orbit earth satellite system providing communication services to the terminal based on the above-mentioned ephemeris information and measurement information; and then determines whether the low-orbit earth satellite system can provide communication services to the terminal based on the service duration. Specifically: if the service duration is less than a first preset threshold, the low-orbit earth satellite system is not used to provide communication services to the terminal; if the service duration is not less than the first preset threshold, the low-orbit earth satellite system is used to provide communication services to the terminal.

[0035] As an optional implementation, the satellite communication system of the present application can perform inter-system collaboration through a dual connection method or a carrier aggregation method when using a low-orbit earth satellite system to provide communication services to a terminal.

[0036] When the satellite communication systems work together in a dual connection mode, after the geostationary orbit satellite system determines through the above steps that the low earth orbit satellite system can provide communication services for the terminal, the following methods can be used for communication:

[0037] Optionally, at the start time of the communication service, the geostationary orbit satellite system sends a secondary node addition request message to the low-orbit earth satellite system, requesting the low-orbit earth satellite to join the existing connection as a secondary node; after receiving the secondary node addition request message, the low-orbit earth satellite system confirms whether there are sufficient resources to support additional connections. If the resources are sufficient, the low-orbit earth satellite system sends a secondary node addition request confirmation message to the geostationary orbit satellite system. After receiving the secondary node addition request confirmation message, the geostationary orbit satellite system sends a wireless resource control reconfiguration message to the terminal to instruct the terminal to configure the low-orbit earth satellite system as a secondary node. After receiving the message, the terminal sends a wireless resource control reconfiguration completion message to confirm that the terminal has completed the configuration change. The geostationary orbit satellite system then sends a secondary node reconfiguration completion message to the low-orbit earth satellite system to notify the low-orbit earth satellite system that the terminal is ready and configured. Thereafter, the low-orbit earth satellite system responds to the random access request of the terminal, establishes a communication link between the terminal and the low-orbit earth satellite system, and transmits data with the terminal.

[0038] Figure 2 A schematic diagram of the process of satellite communication system working in collaboration through dual connection is given. Figure 2 As shown in the figure, the specific steps of this workflow are as follows:

[0039] S1, the terminal sends a radio resource control setup request message RRC SetupRequest to the geostationary orbit satellite system;

[0040] S2, the geostationary orbit satellite system sends a radio resource control establishment message RRC Setup to the terminal;

[0041] S3, after completing resource configuration, the terminal sends a radio resource control setup completion message RRC SetupComplete to the geostationary orbit satellite system;

[0042] S4, the geostationary orbit satellite system obtains the ephemeris information of the low earth orbit satellite system through the inter-satellite link, and obtains the time or position-based measurement information reported by the terminal;

[0043] S5, the geostationary orbit satellite system determines to add a low earth orbit satellite system as an auxiliary node;

[0044] S6, the geostationary orbit satellite system sends a secondary node addition request message SgNBAddition Request to the low earth orbit satellite system;

[0045] S7, the low earth orbit satellite system sends a secondary node addition request confirmation message SgNB Addition Request Acknowledge to the geostationary orbit satellite system;

[0046] S8, the geostationary orbit satellite system sends a radio resource control reconfiguration message RRC Reconfiguration to the terminal for instructing the terminal to configure the low-orbit earth satellite system as a secondary node;

[0047] S9, the terminal sends a radio resource control reconfiguration completion message RRCReconfigurationComplete to the geostationary orbit satellite system;

[0048] S10, the geostationary orbit satellite system sends a secondary node reconfiguration completion message SgNB Reconfiguration Complete to the low earth orbit satellite system;

[0049] S11, the low-orbit earth satellite system responds to the random access request of the terminal and establishes a communication link between the terminal and the low-orbit earth satellite system;

[0050] S12, uplink / downlink data transmission is performed between the low-orbit earth satellite system and the terminal.

[0051] When satellite communication systems work together in a carrier aggregation manner, the geostationary orbit satellite system can also communicate in the following ways after determining that the low-orbit earth satellite system can provide communication services for the terminal through the above:

[0052] Optionally, at the start time of the communication service, the geostationary orbit satellite system sends a wireless resource control reconfiguration message to the terminal, wherein the wireless resource control reconfiguration message includes secondary cell configuration information, so that the terminal can immediately activate the cell when the low-orbit earth satellite system enters the coverage area, and the secondary cell configuration information includes time-frequency information for instructing the terminal to perform time-frequency synchronization with the low-orbit earth satellite system, so that data transmission can be seamlessly performed within the coverage area of ​​the low-orbit earth satellite system; after receiving the wireless resource control reconfiguration message, the terminal sends a wireless resource control reconfiguration completion message to the geostationary orbit satellite, confirming that the terminal has applied the configuration information, but the secondary cell has not been activated and is waiting for further instructions; after receiving the wireless resource control reconfiguration completion message, the geostationary orbit satellite sends a media access control control element for activating the secondary cell to the terminal, and the terminal responds to the media access control control element to activate the secondary cell, thereby establishing a communication link with the low-orbit earth satellite system, ensuring that the terminal can seamlessly perform data transmission within the coverage area of ​​the low-orbit earth satellite system.

[0053] Figure 3 A schematic diagram of a process in which a satellite communication system can work collaboratively through carrier aggregation is given, such as Figure 3 The specific workflow is as follows:

[0054] S1, the terminal sends a radio resource control establishment request message RRCSetupRequest to the geostationary orbit satellite system;

[0055] S2, the geostationary orbit satellite system sends a radio resource control establishment message RRC Setup to the terminal;

[0056] S3, after completing resource configuration, the terminal sends a radio resource control setup completion message RRC Setup Complete to the geostationary orbit satellite system;

[0057] S4, the geostationary orbit satellite system obtains the ephemeris information of the low earth orbit satellite system through the inter-satellite link, and obtains the time or position-based measurement information reported by the terminal;

[0058] S5, the geostationary orbit satellite system determines to add a low earth orbit satellite system as a secondary cell;

[0059] S6, the geostationary orbit satellite system sends a radio resource control reconfiguration message RRCReconfiguration to the terminal;

[0060] S7, the terminal sends a radio resource control reconfiguration completion message RRCReconfiguration Complete to the geostationary orbit satellite system. At this time, the terminal applies the configuration information, but the secondary cell has not been activated and waits for further instructions;

[0061] S8, the geostationary orbit satellite system sends a media access control element MAC CE for activating the secondary cell to the terminal;

[0062] S9, the terminal responds to the media access control element MAC CE, activates the secondary cell, and establishes a communication link with the low-orbit earth satellite system;

[0063] S10, the terminal seamlessly performs uplink / downlink data transmission within the coverage of the low-orbit earth satellite system.

[0064] In the embodiment of the present application, the geostationary orbit satellite system establishes a wireless resource control connection with the terminal; obtains the ephemeris information of the low-orbit earth satellite system through the inter-satellite link, and obtains the measurement information based on time or position reported by the terminal; determines whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; and establishes a communication link between the terminal and the low-orbit earth satellite system when it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal. Among them, the service capability of the low-orbit earth satellite system is evaluated through the ephemeris information and the measurement information reported by the terminal to determine whether to use it to provide communication services for the terminal. Once it is determined to use it to provide communication services for the terminal, the geostationary orbit satellite system will assist in establishing a communication link between the terminal and the low-orbit earth satellite system to ensure the efficiency and stability of data transmission, thereby solving the technical problem that the geostationary orbit satellite and the low-orbit earth satellite in the relevant satellite communication scheme are independent of each other and difficult to meet user needs.

[0065] Example 2

[0066] Based on the satellite communication system provided in Example 1, the embodiment of the present application further provides a satellite communication method, which is applied to a geostationary orbit satellite system. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system injected with a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0067] Figure 4 is a flow chart of a satellite communication method provided according to an embodiment of the present application, such as Figure 4 As shown, the method comprises the following steps:

[0068] Step S402, establishing a radio resource control connection with the terminal;

[0069] Step S404, obtaining ephemeris information of the low-orbit earth satellite system through an inter-satellite link, and obtaining time- or location-based measurement information reported by the terminal;

[0070] Step S406, determining whether to use a low-orbit earth satellite system to provide communication services for the terminal according to the ephemeris information and / or the measurement information;

[0071] Step S408: When it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal, a communication link is established between the terminal and the low-orbit earth satellite system.

[0072] The following describes each step of the satellite communication method in conjunction with a specific implementation process.

[0073] First, the terminal initiates the first step of the communication connection by sending a wireless resource control establishment request message to the geostationary orbit satellite system to request the establishment of a wireless resource control connection; the geostationary orbit satellite system receives the wireless resource control establishment request message sent by the terminal, and sends a wireless resource control establishment message to the terminal, wherein the wireless resource control establishment message includes resource configuration information for instructing the terminal to establish a wireless resource control connection, so that the terminal can correctly configure its wireless resources to prepare for subsequent data transmission; after receiving the wireless resource control establishment message, the terminal applies the resource configuration information therein to set up the wireless resources and prepare to establish a connection. After completing the resource configuration, the terminal sends a wireless resource control establishment completion message to the geostationary orbit satellite system to confirm that the terminal has completed the resource configuration and is ready for subsequent communication.

[0074] Optionally, after the terminal establishes an initial connection with the geostationary orbit satellite system, the geostationary orbit satellite system needs to first obtain corresponding information to determine whether the low-orbit earth satellite system can provide communication services for the terminal. The information can be the ephemeris information of the low-orbit earth satellite system obtained through the inter-satellite link, or it can be time- or position-based measurement information reported by the terminal, or it can be a comprehensive judgment based on the two.

[0075] The geostationary orbit satellite system determines the service start time and service duration of the low-orbit earth satellite system providing communication services to the terminal based on the above-mentioned ephemeris information and measurement information; and then determines whether the low-orbit earth satellite system can provide communication services to the terminal based on the service duration. Specifically: if the service duration is less than a first preset threshold, the low-orbit earth satellite system is not used to provide communication services to the terminal; if the service duration is not less than the first preset threshold, the low-orbit earth satellite system is used to provide communication services to the terminal.

[0076] As an optional implementation, the satellite communication system of the present application can perform inter-system collaboration through a dual connection method or a carrier aggregation method when using a low-orbit earth satellite system to provide communication services to a terminal.

[0077] When the satellite communication systems work together in a dual connection mode, after the geostationary orbit satellite system determines through the above steps that the low earth orbit satellite system can provide communication services for the terminal, the following methods can be used for communication:

[0078] Optionally, at the start time of the communication service, the geostationary orbit satellite system sends a secondary node addition request message to the low-orbit earth satellite system, requesting the low-orbit earth satellite to join the existing connection as a secondary node; after receiving the secondary node addition request message, the low-orbit earth satellite system confirms whether there are sufficient resources to support additional connections. If the resources are sufficient, the low-orbit earth satellite system sends a secondary node addition request confirmation message to the geostationary orbit satellite system. After receiving the secondary node addition request confirmation message, the geostationary orbit satellite system sends a wireless resource control reconfiguration message to the terminal to instruct the terminal to configure the low-orbit earth satellite system as a secondary node. After receiving the message, the terminal sends a wireless resource control reconfiguration completion message to confirm that the terminal has completed the configuration change. The geostationary orbit satellite system then sends a secondary node reconfiguration completion message to the low-orbit earth satellite system to notify the low-orbit earth satellite system that the terminal is ready and configured. Thereafter, the low-orbit earth satellite system responds to the random access request of the terminal, establishes a communication link between the terminal and the low-orbit earth satellite system, and transmits data with the terminal.

[0079] When satellite communication systems work together in a carrier aggregation manner, the geostationary orbit satellite system can also communicate in the following ways after determining that the low-orbit earth satellite system can provide communication services for the terminal through the above:

[0080] Optionally, at the start time of the communication service, the geostationary orbit satellite system sends a wireless resource control reconfiguration message to the terminal, wherein the wireless resource control reconfiguration message includes secondary cell configuration information, so that the terminal can immediately activate the cell when the low-orbit earth satellite system enters the coverage area, and the secondary cell configuration information includes time-frequency information for instructing the terminal to perform time-frequency synchronization with the low-orbit earth satellite system, so that data transmission can be seamlessly performed within the coverage area of ​​the low-orbit earth satellite system; after receiving the wireless resource control reconfiguration message, the terminal sends a wireless resource control reconfiguration completion message to the geostationary orbit satellite, confirming that the terminal has applied the configuration information, but the secondary cell has not been activated and is waiting for further instructions; after receiving the wireless resource control reconfiguration completion message, the geostationary orbit satellite sends a media access control control element for activating the secondary cell to the terminal, and the terminal responds to the media access control control element to activate the secondary cell, thereby establishing a communication link with the low-orbit earth satellite system, ensuring that the terminal can seamlessly perform data transmission within the coverage area of ​​the low-orbit earth satellite system.

[0081] It should be noted that the steps in the satellite communication method in the embodiment of the present application correspond to the interaction process of each module in the satellite communication system in Example 1. Since a detailed description has been given in Example 1, some details not reflected in this embodiment can be referred to Example 1 and will not be repeated here.

[0082] Example 3

[0083] According to an embodiment of the present application, a computer program product is also provided, which includes a computer program, wherein the computer program implements the satellite communication method in Example 2 when executed by a processor.

[0084] According to an embodiment of the present application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein the device where the non-volatile storage medium is located executes the satellite communication method in Example 2 by running the computer program.

[0085] According to an embodiment of the present application, a processor is also provided, which is used to run a computer program, wherein the satellite communication method in Example 2 is executed when the computer program is run.

[0086] According to an embodiment of the present application, an electronic device is also provided, which includes: a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the satellite communication method in Example 2 through the computer program.

[0087] Specifically, the computer program executes the following steps when it is running: establishing a wireless resource control connection with the terminal; obtaining the ephemeris information of the low-orbit earth satellite system through an inter-satellite link, and obtaining the time- or position-based measurement information reported by the terminal; determining whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; and establishing a communication link between the terminal and the low-orbit earth satellite system when it is determined that the low-orbit earth satellite system is used to provide communication services for the terminal.

[0088] As an optional implementation, the electronic device may be in the form of a mobile terminal, a computer terminal or a similar computing device. Figure 5 FIG. 1 shows a hardware structure block diagram of an electronic device for implementing a satellite communication method. Figure 5 As shown, the electronic device 50 may include one or more (502a, 502b, ..., 502n are used to illustrate) processors 502 (the processor 502 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 504 for storing data, and a transmission device 506 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 5 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 5 More or fewer components as shown, or with Figure 5 Different configurations are shown.

[0089] It should be noted that the one or more processors 502 and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the electronic device 50. As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0090] The memory 504 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the satellite communication method in the embodiment of the present application. The processor 502 executes various functional applications and data processing by running the software programs and modules stored in the memory 504, that is, to implement the vulnerability detection method of the above-mentioned application. The memory 504 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 504 may further include a memory remotely arranged relative to the processor 502, and these remote memories may be connected to the electronic device 50 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0091] The transmission device 506 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the electronic device 50. In one example, the transmission device 506 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 506 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0092] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the electronic device 50 .

[0093] The serial numbers of the above embodiments are only for description and do not represent the advantages or disadvantages of the embodiments.

[0094] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0096] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0097] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0098] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0099] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A satellite communication method, applied to a geostationary orbit satellite system, characterized in that: include: Establishing a radio resource control connection with the terminal; Acquire ephemeris information of a low-orbit earth satellite system through an intersatellite link, and acquire time- or location-based measurement information reported by the terminal; determining, according to the ephemeris information and / or the measurement information, whether to use the low-orbit earth satellite system to provide communication services for the terminal; In case it is determined that the low earth orbit satellite system is used to provide communication services for the terminal, a communication link is established between the terminal and the low earth orbit satellite system.

2. The method according to claim 1, characterized in that: Establishing a radio resource control connection with the terminal, including: Receiving a radio resource control establishment request message sent by the terminal; Sending a radio resource control establishment message to the terminal, wherein the radio resource control establishment message includes resource configuration information for instructing the terminal to establish a radio resource control connection; A radio resource control establishment completion message sent by the terminal is received.

3. The method according to claim 1, characterized in that Determining whether to use the low-orbit earth satellite system to provide communication services for the terminal according to the ephemeris information and / or the measurement information includes: Determine, based on the ephemeris information and / or the measurement information, a service start time and a service duration at which the low-orbit earth satellite system can provide communication services to the terminal; If the service duration is less than a first preset threshold, determining not to use the low-orbit earth satellite system to provide communication services for the terminal; If the service duration is not less than the first preset threshold, it is determined to use the low-orbit earth satellite system to provide communication services for the terminal.

4. The method according to claim 3, characterized in that Establishing a communication link between the terminal and the low earth orbit satellite system, comprising: Sending a secondary node addition request message to the low earth orbit satellite system at the service start time; receiving a secondary node adding request confirmation message sent by the low earth orbit satellite system; Sending a radio resource control reconfiguration message to the terminal, wherein the radio resource control reconfiguration message is used to instruct the terminal to configure the low-orbit earth satellite system as a secondary node; Receiving a radio resource control reconfiguration completion message sent by the terminal; Sending a secondary node reconfiguration completion message to the low earth orbit satellite system; The low-orbit earth satellite system is used to respond to the random access request of the terminal and establish a communication link with the terminal.

5. The method according to claim 3, characterized in that: Establishing a communication link between the terminal and the low earth orbit satellite system, comprising: Before the service start time, sending a radio resource control reconfiguration message to the terminal, wherein the radio resource control reconfiguration message includes secondary cell configuration information, and the secondary cell configuration information includes time-frequency information for instructing the terminal to perform time-frequency synchronization with the low-orbit earth satellite system; receiving a radio resource control reconfiguration completion message sent by the terminal, wherein the secondary cell configured by the terminal is in an inactivated state; A media access control element for activating a secondary cell is sent to the terminal at the service start time, wherein the terminal is configured to respond to the media access control element, activate the secondary cell, and establish a communication link with the low-orbit earth satellite system.

6. The method according to any one of claims 1 to 5, characterized in that The geostationary orbit satellite system comprises: a geostationary orbit satellite, a first ground base station or a first on-satellite base station corresponding to the geostationary orbit satellite; The low-orbit earth satellite system includes: a low-orbit earth satellite, and a second ground base station or a second on-satellite base station corresponding to the low-orbit earth satellite.

7. The method according to any one of claims 1 to 5, characterized in that Transmitting signaling between the geostationary satellite system and the terminal; Data is transmitted between the low earth orbit satellite system and the terminal.

8. A satellite communication system, characterized in that: include: terminals, geostationary satellite systems and low Earth orbit satellite systems, wherein: The geostationary orbit satellite system is used to establish a radio resource control connection with the terminal; obtain ephemeris information of the low-orbit earth satellite system through an inter-satellite link, and obtain time- or location-based measurement information reported by the terminal; and determine whether to use the low-orbit earth satellite system to provide communication services for the terminal based on the ephemeris information and / or the measurement information; In case it is determined that the low earth orbit satellite system is used to provide communication services for the terminal, a communication link is established between the terminal and the low earth orbit satellite system.

9. A computer program product, characterized in that include: A computer program, wherein when the computer program is executed by a processor, the satellite communication method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: include: A memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the satellite communication method according to any one of claims 1 to 7 through the computer program.

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