Information transmission method and device, satellite network equipment and core network equipment

Abstract

The invention provides an information transmission method and device, on-satellite network equipment and core network equipment, and the method is executed by the on-satellite network equipment and comprises the steps: receiving context information of a target terminal sent by the core network equipment; wherein the context information is sent when the core network device determines that the on-satellite network device can provide coverage and / or service for a first target geographic position after a first preset time according to ephemeris information, and the target terminal is a terminal located at the first target geographic position; or, the context information is sent by the core network device according to a context request message of the on-satellite network device, and the target terminal does not establish a radio resource control (RRC) connection with the on-satellite network device. According to the scheme, the context information of the target terminal is acquired from the core network equipment, so that the satellite network equipment can provide services for the terminal based on the requirements of the terminal, and the service time delay of the terminal can be reduced.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an information transmission method, device, satellite network equipment and core network equipment. Background Art

[0002] In the store and forward (S&F) scenario, if the core network wants to establish a security context with the terminal, the satellite needs to interact with the terminal first. However, since the satellite does not have the non-access (NAS) information of the terminal at this time, the satellite needs to disconnect the Uu port connection with the terminal, and then interact with the core network to transmit the terminal's request information and obtain the core network's reply to the terminal's NAS message. The next time the satellite can provide coverage for the terminal, the core network's verification information will be sent to the terminal. However, the satellite's trajectory is changing, and it may not be able to provide coverage for the terminal after running around the earth. In addition, it takes a long time to travel around the earth, which also has a bad impact on the service latency.

[0003] Specifically, at time t0, the satellite can provide coverage for the terminal, but the satellite has no feedback link (feeder link) connected to the core network. After the terminal sends a UL message (carrying a message to the core network), the satellite can only store it locally and cannot forward it to the core network, nor can it send the core network's information to the terminal. At time T2, when the satellite restores the connection with the core network, the satellite sends the terminal UL message to the core network. However, the satellite needs to make a circle before it can send the core network message to the terminal, resulting in a large data transmission delay. Even due to problems such as satellite trajectory deviation, the satellite can no longer re-cover the terminal's geographical location. Summary of the invention

[0004] The embodiments of the present application provide an information transmission method, apparatus, satellite network equipment and core network equipment to reduce service delay.

[0005] In order to solve the above technical problems, an embodiment of the present application provides an information transmission method, which is performed by an on-board network device, including:

[0006] Receiving context information of the target terminal sent by the core network device;

[0007] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0008] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

[0009] Optionally, when the context information is sent by the core network device according to a context request message of the on-board network device, the method further includes:

[0010] When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal;

[0011] The target condition includes at least one of the following:

[0012] The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time;

[0013] The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location;

[0014] The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location;

[0015] The target terminal is a terminal located at the second target geographical location.

[0016] Optionally, the method further comprises at least one of the following:

[0017] determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time;

[0018] According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

[0019] Optionally, determining whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location includes:

[0020] If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0021] Optionally, the determining whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time according to whether the reference point of the service cell of the on-board network device enters the second target geographical location includes:

[0022] If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0023] Optionally, the context request message carries location information of the second target geographic location or identification information of the target terminal.

[0024] Optionally, the context information of the target terminal includes at least one of the following:

[0025] Identification information of the target terminal;

[0026] Business information of the target terminal;

[0027] Battery storage information of the target terminal;

[0028] Geographical location information of the target terminal.

[0029] The embodiment of the present application also provides an information transmission method, which is executed by a core network device, including:

[0030] When determining, based on the ephemeris information, that the onboard network device is able to provide coverage and / or service for a first target geographical location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographical location; or

[0031] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0032] Optionally, in a case where the context request message sent by the on-board network device is received, sending the context information of the target terminal to the on-board network device includes:

[0033] Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message;

[0034] The context information of the target terminal is sent to the onboard network device.

[0035] Optionally, the context information of the target terminal includes at least one of the following:

[0036] Identification information of the target terminal;

[0037] Business information of the target terminal;

[0038] Battery storage information of the target terminal;

[0039] Geographical location information of the target terminal.

[0040] The embodiment of the present application also provides an on-board network device, including a memory, a transceiver, and a processor:

[0041] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0042] Receiving, through the transceiver, context information of the target terminal sent by the core network device;

[0043] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0044] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

[0045] Optionally, when the context information is sent by the core network device according to a context request message of the onboard network device, the processor is configured to read the computer program in the memory and further perform the following operations:

[0046] When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal;

[0047] The target condition includes at least one of the following:

[0048] The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time;

[0049] The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location;

[0050] The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location;

[0051] The target terminal is a terminal located at the second target geographical location.

[0052] Optionally, the processor, for reading the computer program in the memory, further performs at least one of the following operations:

[0053] determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time;

[0054] According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

[0055] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0056] If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0057] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0058] If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0059] Optionally, the context request message carries location information of the second target geographic location or identification information of the target terminal.

[0060] Optionally, the context information of the target terminal includes at least one of the following:

[0061] Identification information of the target terminal;

[0062] Business information of the target terminal;

[0063] Battery storage information of the target terminal;

[0064] Geographical location information of the target terminal.

[0065] The embodiment of the present application also provides a core network device, including a memory, a transceiver, and a processor:

[0066] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0067] When determining, based on the ephemeris information, that the onboard network device is able to provide coverage and / or service for a first target geographical location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographical location; or

[0068] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0069] Optionally, the processor is configured to read the computer program in the memory and perform the following operations:

[0070] Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message;

[0071] The context information of the target terminal is sent to the onboard network device.

[0072] Optionally, the context information of the target terminal includes at least one of the following:

[0073] Identification information of the target terminal;

[0074] Business information of the target terminal;

[0075] Battery storage information of the target terminal;

[0076] Geographical location information of the target terminal.

[0077] The embodiment of the present application further provides an information transmission device, which is applied to an on-board network device, including:

[0078] A receiving unit, configured to receive context information of a target terminal sent by a core network device;

[0079] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0080] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

[0081] The embodiment of the present application further provides an information transmission device, which is applied to a core network device, including:

[0082] A first sending unit is configured to send context information of a target terminal to the onboard network device when it is determined based on the ephemeris information that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, wherein the target terminal is a terminal located at the first target geographical location; or

[0083] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0084] An embodiment of the present application further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above method.

[0085] The beneficial effects of this application are:

[0086] The above solution obtains the context information of the target terminal from the core network device, so that the onboard network device can provide services to the terminal based on the needs of the terminal, thereby reducing the service delay of the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0088] Figure 1 A structural diagram showing a network system applicable to an embodiment of the present application;

[0089] Figure 2 A schematic diagram showing a flow chart of an information transmission method according to an embodiment of the present application;

[0090] Figure 3 A schematic diagram showing the distance between the sub-satellite point and the reference position;

[0091] Figure 4 A schematic diagram showing the distance between a reference point of a serving cell and a reference position;

[0092] Figure 5 A schematic diagram showing the ephemeris and coverage area of ​​the satellite operation;

[0093] Figure 6 A schematic diagram showing the time coverage area of ​​satellite operation;

[0094] Figure 7 A second flowchart of the information transmission method according to an embodiment of the present application is shown;

[0095] Figure 8 One of the unit schematic diagrams showing the information transmission device according to an embodiment of the present application;

[0096] Fig. 9 A structural diagram showing an on-board network device according to an embodiment of the present application;

[0097] Fig.10 A second unit schematic diagram showing the information transmission device according to an embodiment of the present application. DETAILED DESCRIPTION

[0098] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are 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 are within the scope of protection of this application.

[0099] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, are implemented in a sequence 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, the process, method, system, product or equipment 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 equipment.

[0100] In the embodiments of the present application, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0101] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0102] The relevant concepts mentioned in this application are briefly described below.

[0103] 1. Non-Terrestrial Network (NTN, i.e. satellite network)

[0104] NTN refers to using satellites as communication relays to connect terminals and base stations wirelessly. NTN can improve network coverage and provide continuous coverage for terminals in scenarios such as deserts and oceans.

[0105] A typical NTN is as follows: the service link is between the NTN satellite and the terminal, and the feeder link is between the NTN satellite and the NTN gateway. For ease of understanding, the NTN satellite and the NTN gateway are usually considered as part of the gNB.

[0106] Based on this network architecture, NTN satellites transparently forward data from base stations to terminals. Similarly, terminal data is transparently forwarded to NTN gateways and base stations via NTN satellites.

[0107] The NTN network includes the following three service links:

[0108] Earth-fixed cell: The cell covered by NTN satellites remains unchanged, such as the cell projected on the ground by Geosynchronous Earth Orbit (GEO) satellites.

[0109] Quasi-Earth-fixed cell: The satellite beam stably covers a fixed area on the surface for a period of time.

[0110] Earth-moving cell (EMC): In this scenario, the satellite's beam coverage slides on the surface of the earth.

[0111] In a quasi-earth fixed cell (EFC), the coverage of the satellite remains unchanged over a period of time. The concept of a reference location is defined in EFC to assist the user equipment (UE) in determining the distance to the cell. A possible implementation method is that the reference location is the center of a circular cell. Since the coverage of the satellite remains unchanged over a period of time in EFC, the reference location will not change during this service time. In conditional handover (CHO), the terminal determines whether it is far away from the source cell and / or whether it is close to the target cell by comparing the distance with the reference location. When the conditions are met, the terminal switches to the target cell.

[0112] In EMC, the coverage area of ​​the satellite changes as the satellite moves.

[0113] 2. Store and forward (S&F) mode

[0114] In the 5G network, S&F refers to satellite access providing such a communication service: for services with low latency requirements, the satellite provides intermittent / temporary satellite connections within the satellite coverage area (for example, the satellite is not connected to the ground network through a feeder link or inter-satellite link).

[0115] Here is an example from S&F:

[0116] In the normal / default satellite operation mode, the interaction of signaling and data requires the simultaneous activation of the service link and feeder link on the terminal and remote ground network sides. In this way, when the terminal communicates with the satellite via the service link, there will be a continuous end-to-end (from the terminal to the satellite, and the ground network) connection path.

[0117] In contrast, in the S&F satellite mode, the end-to-end signaling / data service consists of two steps. In step A, signaling and data transmission are performed between the terminal and the satellite, but the satellite is not served by the ground network side (i.e., the satellite can provide a service link, but there is no activated feeder link). In step B, the connection between the satellite and the ground network is established, so the communication between the satellite and the ground network side begins. Therefore, the satellite is connected to the terminal in step A and then connected to the ground network in step B.

[0118] The sub-satellite point can be considered as the projection of the satellite on the ground;

[0119] Reference location: indicates the projection of the center point of the cell served by the satellite on the ground. The Reference location has a relative position relationship with the sub-satellite point.

[0120] Figure 1A block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal 11 and a network side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device (WearableDevice), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (personal computer, PC), an ATM or a self-service machine, a sensing business terminal, various sensors, smart cameras and other terminal-side devices, and wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B, a home evolved node B, a transmitting and receiving point (TRP), a perception signal sending device, a perception information receiving device or other suitable terms in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home user server (Home Subscriber Server, HSS), centralized network configuration (CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function (AF), Sensing Function (SF), etc.

[0121] The following is an introduction to the embodiments of the present application in conjunction with the accompanying drawings. The information transmission method, device, satellite network device and core network device provided in the embodiments of the present application can be applied to a wireless communication system. The wireless communication system can be a system using the fifth generation (5th Generation, 5G) mobile communication technology (hereinafter referred to as a 5G system). Those skilled in the art can understand that the 5G NR system is only an example and is not a limitation.

[0122] The embodiments of the present application provide an information transmission method, apparatus, satellite network equipment and core network equipment to reduce service delay.

[0123] Among them, the method and the device are based on the same application concept. Since the method and the device solve the problem in a similar principle, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0124] like Figure 2 As shown, an embodiment of the present application provides an information transmission method, which is executed by an on-board network device, including:

[0125] Step S201, receiving context information of a target terminal sent by a core network device;

[0126] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0127] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and a radio resource control (RRC) connection is not established between the target terminal and the on-board network device.

[0128] It should be noted that the context information of the target terminal may be actively sent by the core network device to the onboard network device, or may be sent by the core network device based on a request from the onboard network device.

[0129] Optionally, in one implementation, the context information of the target terminal includes at least one of the following:

[0130] A11, identification information of the target terminal;

[0131] Optionally, the identification information may be a UE ID, for example, a Universal Subscriber Identity Module (USIM) ID, or an International Mobile Subscriber Identity (IMSI).

[0132] A12, business information of the target terminal;

[0133] Optionally, the service information may be a service cycle, a service data packet size, etc.

[0134] A13, battery storage information of the target terminal;

[0135] Optionally, the battery storage information may refer to the remaining battery power or the battery capacity.

[0136] A14, geographic location information of the target terminal;

[0137] Optionally, the geographical location information may be an absolute location, such as a location determined by a global positioning system (GPS), or a relative location, such as cell information or a geographical range where the terminal is located.

[0138] Optionally, in the case where the context information of the target terminal is actively sent by the core network device to the onboard network device, during the operation of the onboard network device, the core network device may send the context information of some or all terminals within the coverage range of the first target geographic location to the onboard network device based on the ephemeris information of the satellite corresponding to the onboard network device. If it is determined that a certain onboard network device can provide coverage and / or service for the first target geographic location after a first preset time, the core network device may send the context information of some or all terminals within the coverage range of the first target geographic location to the onboard network device, so that the satellite can provide services to the terminals within the coverage range when it operates to the first target geographic location.

[0139] It should be noted that the first target geographical location can be a geographical location range, such as a sea area, a tropical rain forest, a grassland, etc., and the shape can be irregular. The first target geographical location can be described by the center and radius, and the center can be the longitude and latitude coordinates; it can also be described by an irregular shape drawn by multiple points, for example, the first target geographical location includes a series of geographical location coordinates (such as longitude and latitude coordinates), and these points are connected to form the first target geographical location.

[0140] Optionally, when the core network device actively sends to the onboard network device, if the onboard network device receives the context information of the target terminal sent by the core network device, it can also send feedback information to the core network device to inform the core network device that the context information of the target terminal has been received.

[0141] Optionally, in one implementation, when the context information is sent by the core network device according to a context request message of the on-board network device, the method further includes:

[0142] When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal;

[0143] The target condition includes at least one of the following:

[0144] B11. The onboard network device is capable of providing coverage and / or service for the second target geographic location after the second preset time;

[0145] It should be noted that the target terminal is a terminal located at the second target geographical location. Optionally, the second target geographical location may be a geographical location range, such as a sea area, a tropical rain forest, a grassland, etc., and the shape may be irregular. The second target geographical location may be described by the center of a circle and a radius, and the center of the circle may be a longitude and latitude coordinate; or it may be described by an irregular shape drawn by multiple points, for example, the first target geographical location includes a series of points of geographical location coordinates (such as longitude and latitude coordinates), and connecting these points constitutes the first target geographical location.

[0146] It should be noted that during operation, the onboard network device will determine in real time based on the ephemeris information whether it can provide coverage and / or services for the second target geographic location after the second preset time. If it can provide coverage and / or services for the second target geographic location after the second preset time, the onboard network device can send a context request message of some or all terminals within the coverage range of the second target geographic location to the core network device to obtain the context information of some or all terminals within the coverage range of the second target geographic location, so that the onboard network device can provide services to the terminals within the coverage range when it runs to the second target geographic location.

[0147] In this case, optionally, in one implementation, the embodiment of the present application further provides a method for determining whether the onboard network device can provide coverage and / or service for the second target geographical location after the second preset time, and specifically at least one of the following methods may be used:

[0148] B111. Determine, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time;

[0149] It should be noted that this implementation method uses the sub-satellite point for determination. Optional implementation methods include:

[0150] If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0151] Optionally, the reference position of the second target geographic location is configured on the network side or agreed upon by protocol; for example, the reference position of the second target geographic location may be a central position of the second target geographic location, or may be a specific edge position of the second target geographic location.

[0152] For example, Figure 3As shown, the second target geographic location is an ellipse, and the reference position P of the second target geographic location is set to the edge of the long side of the ellipse. When the distance K1 between the sub-satellite point M corresponding to the on-board network device and the reference position P of the second target geographic location is less than or equal to the first distance threshold d1, the on-board network device determines that it can provide coverage and / or service for the second target geographic location after the second preset time.

[0153] It should also be noted that the first distance threshold is a network configuration or protocol agreement. Considering the round-trip time (RTT) between the satellite and the ground core network, the value of the first distance threshold should be set above 100 meters.

[0154] B112. Determine whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time, based on whether a reference point of the service cell of the on-board network device enters a second target geographical location.

[0155] It should be noted that this implementation method uses the reference point of the serving cell for determination, and optional implementation methods include:

[0156] If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0157] It should be noted that there may be multiple service cells for the onboard network equipment, and there will be multiple reference points for the service cells. At this time, there will be multiple distances between the reference points and the reference position of the second target geographic location. Usually, when in use, the one with the smallest distance between the multiple reference points and the reference position of the second target geographic location will be selected. If this distance is less than or equal to the second distance threshold, it can be determined that the onboard network equipment can provide coverage and / or service for the second target geographic location after the second preset time.

[0158] For example, Figure 4 As shown, the second target geographic location is an ellipse, and the reference position P of the second target geographic location is set to the edge of the long side of the ellipse. The onboard network device includes 7 service cells, among which the reference point N of the service cell 7 is the shortest distance from the reference position P of the second target geographic location among all the service cells. If the distance K2 between the reference point N of the service cell 7 and the reference position P is less than or equal to the second distance threshold d2, the onboard network device determines that it can provide coverage and / or service for the second target geographic location after the second preset time.

[0159] B12. The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location;

[0160] It should be noted that the ephemeris can be used to indicate the running trajectory of the onboard network device. For example, the ephemeris can provide the speed of the onboard network device (including horizontal and vertical directions), the height, semi-major axis, eccentricity, pericenter, inclination, mean anomaly, etc. of the onboard network device. The coverage and / or service range of the onboard network device determined according to the ephemeris of the onboard network device covering the second target geographical location can be understood as: the onboard network device can provide coverage and / or service for the second target geographical location.

[0161] For example, Figure 5 As shown, the ephemeris information stored in the satellite corresponding to the on-board network device is the first ephemeris information, and the coverage and / or service range of the on-board network device calculated by the first ephemeris information includes the second target geographical location. When at time T0, the ephemeris calculated by the satellite is the 0th ephemeris information, which does not belong to the stored ephemeris information, and the coverage and / or service range of the on-board network device calculated by the 0th ephemeris information does not include the second target geographical location, then the satellite cannot send a context request message to the core network device; when at time T1, the ephemeris calculated by the satellite is the first ephemeris information, which belongs to the stored ephemeris information, and at this time the satellite can send a context request message to the core network device; when at time T2, the ephemeris calculated by the satellite is the second ephemeris information, which does not belong to the stored ephemeris information, and the coverage and / or service range of the on-board network device calculated by the second ephemeris information does not include the second target geographical location, then the satellite cannot send a context request message to the core network device.

[0162] B13. The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographic location;

[0163] This situation can be understood as that when the onboard network device is running, it determines in real time whether it has reached the time when it can provide coverage and / or service for the second target geographic location. If it has reached the time when it can provide coverage and / or service for the second target geographic location, a context request message can be sent to the core network device. If it has not reached the time when it can provide coverage and / or service for the second target geographic location, a context request message cannot be sent to the core network device.

[0164] like Figure 6As shown, the time information stored in a certain satellite is time t1. When the satellite is at time t0, it does not belong to the stored time information, and the satellite cannot send a context request message to the core network device; when it is at time t1, it belongs to the stored time information, and the satellite can send a context request message to the core network device; when it is at time t2, it does not belong to the stored time information, and the satellite cannot send a context request message to the core network device.

[0165] Optionally, in one implementation, the context request message carries the location information of the second target geographic location or the identification information of the target terminal. It should be noted that when the context request message carries the location information of the second target geographic location, the core network device usually needs to send the context of all terminals within the coverage of the second target geographic location to the onboard network device. At this time, the context information of the target terminal sent by the core network is the context information of all terminals within the coverage of the second target geographic location; of course, in order to save signaling overhead, the onboard network device may also only request the context information of specific terminals within the coverage of the second target geographic location. At this time, the context information of the target terminal sent by the core network is the context information of the specific terminal within the coverage of the second target geographic location.

[0166] Optionally, the context request message may be a protocol data unit session resource modification indication (PDU SESSIONRESOURCE MODIFY INDICATION) message. After receiving the context request message, the core network device may feedback a protocol data unit session resource modification confirmation (PDU SESSION MODIFY RESOURCE CONFIRM) message to the onboard network device. The PDU SESSION MODIFY RESOURCE CONFIRM message carries the context information of the target terminal.

[0167] Optionally, the target terminal mentioned in the embodiment of the present application may be one or more. For example, the target terminal may be a buoy in the sea, or equipment carried by explorers in the tropical rainforest, or monitoring equipment on animals on the grassland, or a camera, etc.

[0168] The specific application examples of the embodiments of the present application are described below.

[0169] Application scenario 1: The satellite network device is about to provide coverage and / or services for the second target geographic location, and obtain the context information of the terminal based on the geographic location

[0170] Specifically, the main implementation process includes:

[0171] Step 101: At time t0, the onboard network device determines whether to provide coverage and / or service for a second target geographic location.

[0172] The on-board network device determines whether the reference point of its sub-satellite point or the serving cell enters the range of the second target geographical location, for example, whether the distance from the boundary of the second target geographical location is less than or equal to a threshold;

[0173] Step 102: When the conditions in step 101 are met, the onboard network device sends a context request message to the core network device, where the context request message is used to request context information of the target terminal.

[0174] Optionally, the context request message carries location information of the second target geographic location;

[0175] The target terminal is a terminal in the second target geographical location, such as a buoy in the sea, or equipment carried by explorers in the rainforest, or monitoring equipment or cameras on animals in the grassland.

[0176] Step 103: After receiving the context request message, the core network device feeds back a response message.

[0177] The response message carries the context information of the target terminal.

[0178] Optionally, the core network device determines the terminals in the second target geographical location according to the location information of the second target geographical location, and carries the context information of these terminals in the response message.

[0179] The context information of the target terminal may include one or more of the following:

[0180] The target terminal's service information, such as service cycle, data packet size and other historical information;

[0181] Battery storage information of the target terminal;

[0182] Geographical location information of the target terminal.

[0183] Application scenario 2: The satellite network device is about to provide coverage and / or service for the second target geographic location, and obtains the context information of the terminal according to the identification information of the terminal

[0184] Specifically, the main implementation process includes:

[0185] Step 201, same as step 101 in application case 1;

[0186] Step 202: When the condition in step 101 is met, the onboard network device sends a context request message to the core network device, where the context request message is used to request context information of the target terminal.

[0187] Optionally, the onboard network device carries the identification information of the target terminal in the context request message, and the identification information of the target terminal is obtained by mapping the second target geographic location information; for example, the onboard network device pre-stores the correspondence between the terminal USIM information or IMSI information and the second target geographic location.

[0188] Step 203: After receiving the context request message, the core network device feeds back a response message.

[0189] The response message carries the context information of the target terminal; optionally, the core network device obtains the corresponding context information according to the identification information of the target terminal, and carries the context information of the target terminal in the response message.

[0190] The context information of the target terminal may include one or more of the following:

[0191] The target terminal's service information, such as service cycle, data packet size and other historical information;

[0192] Battery storage information of the target terminal;

[0193] Geographical location information of the target terminal.

[0194] Application Scenario 3: When the satellite network equipment is about to reach the second target geographical location corresponding to a specific ephemeris

[0195] Specifically, the main implementation process includes:

[0196] Step 301: The onboard network device determines whether the ephemeris satisfies the ephemeris at the second target geographical location.

[0197] The on-board network device stores first ephemeris information corresponding to the second target geographic location. The first ephemeris information may be one or more ephemeris information. The first ephemeris information may be sent by a core network device to the on-board network device.

[0198] Optionally, the on-board network device determines the ephemeris of the current on-board network device according to a calculation method of the satellite orbit.

[0199] For example, the ephemeris information stored in the onboard network device is the first ephemeris information.

[0200] like Figure 5 As shown, at time T0, the ephemeris calculated by the onboard network device is the 0th ephemeris information, which does not belong to the stored ephemeris information and does not meet the condition;

[0201] At time T1, the ephemeris calculated by the onboard network device is the first ephemeris information, which belongs to the stored ephemeris information, and the condition is met at this time;

[0202] At time T2, the ephemeris calculated by the onboard network device is the second ephemeris information, which does not belong to the stored ephemeris information and does not meet the condition;

[0203] Step 302-step 303, when the conditions are met, are the same as step 102-step 103 of application case 1, or the same as step 202-step 203 of application case 2.

[0204] Application Scenario 4: Satellite network equipment determines the real-time moment to meet specific time information

[0205] Specifically, the main implementation process includes:

[0206] Step 401: The onboard network device determines whether the current time is the indicated time information.

[0207] The on-board network device stores first time information, which may be one or more time information, and the first time information may be sent by a core network device to the on-board network device.

[0208] For example, the time information stored in the onboard network device is t1.

[0209] When it is at time t0, it does not belong to the stored time information and does not meet the conditions;

[0210] When it is at time t1, it belongs to the stored time information, and the condition is met at this time;

[0211] At time t2, it does not belong to the stored time information and does not meet the conditions;

[0212] Step 402-step 403, when the conditions are met, are the same as step 102-step 103 of application case 1, or the same as step 202-step 203 of application case 2.

[0213] Application scenario 5: The satellite network device directly receives the context information of the terminal sent by the core network device. Specifically, the main implementation process includes:

[0214] Step 501: During the operation of the on-board network device, when the core network device determines, based on the ephemeris information, that the on-board network device provides coverage or service for a first target geographic location, the core network device sends context information of the target terminal to the on-board network device.

[0215] The context information of the target terminal may include one or more of the following:

[0216] Identification information of the target terminal, such as USIM ID information;

[0217] The target terminal's service information, such as service cycle, data packet size and other historical information;

[0218] Battery storage information of the target terminal;

[0219] Geographical location information of the target terminal.

[0220] Step 502: After receiving the context information of the target terminal sent by the core network device, the onboard network device sends feedback information to the core network device.

[0221] It should be noted that the embodiments of the present application can enable multiple satellites to provide services to the terminal. When the terminal leaves the coverage of a satellite, the next satellite covering the terminal can obtain the context information of the terminal from the core network device and continue to serve the terminal. This can solve the problem of large delay caused by a single satellite providing services to the terminal in the S&F scenario. The embodiments of the present application can reduce the service delay of the terminal.

[0222] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new radio (NR) system, etc. These various systems include terminals (also referred to as terminal equipment) and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0223] The terminal involved in the embodiment of the present application may also be referred to as a terminal device, which may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be referred to as a user equipment (UE). A wireless terminal device may communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device may be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs) and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, and a user device, but is not limited in the embodiments of the present application.

[0224] The network device involved in the embodiment of the present application may be a base station, which may include multiple cells providing services for the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, and serve as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (Global System for Mobile communications, GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (Home evolved Node B, HeNB), a relay terminal node (relay node), a home base station (femto), a pico base station (pico), etc., which is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0225] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, or it can be diversity transmission, precoded transmission or beamforming transmission, etc.

[0226] like Figure 7 As shown, an embodiment of the present application provides an information transmission method, which is executed by a core network device, including:

[0227] Step S701, when determining, based on ephemeris information, that an onboard network device is able to provide coverage and / or service for a first target geographic location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographic location; or

[0228] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0229] Optionally, in an implementation manner, when receiving a context request message sent by an on-board network device, sending the context information of the target terminal to the on-board network device includes:

[0230] Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message;

[0231] The context information of the target terminal is sent to the onboard network device.

[0232] Optionally, in one implementation, the context information of the target terminal includes at least one of the following:

[0233] Identification information of the target terminal;

[0234] Business information of the target terminal;

[0235] Battery storage information of the target terminal;

[0236] Geographical location information of the target terminal.

[0237] It should be noted that all implementation methods in the above embodiments are applicable to the embodiments of the information transmission method applied to the on-board network device side, and can achieve the same technical effect, which will not be repeated here.

[0238] like Figure 8 As shown, the embodiment of the present application provides an information transmission device 800, which is applied to a satellite network device, including:

[0239] The receiving unit 801 is used to receive the context information of the target terminal sent by the core network device;

[0240] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0241] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

[0242] Optionally, when the context information is sent by the core network device according to a context request message of the on-board network device, the apparatus further includes:

[0243] A second sending unit, configured to send a context request message to a core network device when a target condition is met, wherein the context request message is used to request context information of the target terminal;

[0244] The target condition includes at least one of the following:

[0245] The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time;

[0246] The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location;

[0247] The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location;

[0248] The target terminal is a terminal located at the second target geographical location.

[0249] Optionally, the device further comprises at least one of the following:

[0250] a determining unit, configured to determine whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location;

[0251] According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

[0252] Optionally, the specific implementation method of determining whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location includes:

[0253] If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0254] Optionally, the specific implementation manner of determining whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time according to whether the reference point of the service cell of the on-board network device enters the second target geographical location includes:

[0255] If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0256] Optionally, the context request message carries location information of the second target geographic location or identification information of the target terminal.

[0257] Optionally, the context information of the target terminal includes at least one of the following:

[0258] Identification information of the target terminal;

[0259] Business information of the target terminal;

[0260] Battery storage information of the target terminal;

[0261] Geographical location information of the target terminal.

[0262] It should be noted that the device embodiment is a device that corresponds one-to-one to the above-mentioned method embodiment. All implementation methods in the above-mentioned method embodiment are applicable to the device embodiment and can achieve the same technical effect.

[0263] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a 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.

[0264] 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 processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0265] like Fig. 9 As shown, the embodiment of the present application also provides an on-board network device, including a processor 900, a transceiver 910, a memory 920, and a program stored in the memory 920 and executable on the processor 900; wherein the transceiver 910 is connected to the processor 900 and the memory 920 through a bus interface, wherein the processor 900 is used to read the program in the memory and execute the following process:

[0266] Receiving, through the transceiver, context information of the target terminal sent by the core network device;

[0267] The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location;

[0268] Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

[0269] The transceiver 910 is configured to receive and send data under the control of the processor 900 .

[0270] Among them, Fig. 9 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 900 and memory represented by memory 920. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 910 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, including transmission media such as wireless channels, wired channels, optical cables, and the like.

[0271] The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 when performing operations.

[0272] Optionally, the processor 900 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0273] The processor calls the computer program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0274] In some embodiments, when the context information is sent by the core network device according to the context request message of the onboard network device, the processor is configured to read the computer program in the memory and further perform the following operations:

[0275] When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal;

[0276] The target condition includes at least one of the following:

[0277] The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time;

[0278] The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location;

[0279] The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location;

[0280] The target terminal is a terminal located at the second target geographical location.

[0281] In some embodiments, the processor, for reading the computer program in the memory, further performs at least one of the following operations:

[0282] determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time;

[0283] According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

[0284] In some embodiments, the processor is configured to read the computer program in the memory and perform the following operations:

[0285] If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0286] In some embodiments, the processor is configured to read the computer program in the memory and perform the following operations:

[0287] If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

[0288] In some embodiments, the context request message carries location information of the second target geographic location or identification information of the target terminal.

[0289] In some embodiments, the context information of the target terminal includes at least one of the following:

[0290] Identification information of the target terminal;

[0291] Business information of the target terminal;

[0292] Battery storage information of the target terminal;

[0293] Geographical location information of the target terminal.

[0294] It should be noted here that the above-mentioned on-board network device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0295] The embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the information transmission method applied to an on-board network device. The processor-readable storage medium may be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0296] like Fig.10 As shown, the embodiment of the present application provides an information transmission device 1000, which is applied to a core network device, including:

[0297] A first sending unit 1001 is configured to send context information of a target terminal to the on-board network device when it is determined based on the ephemeris information that the on-board network device can provide coverage and / or service for a first target geographical location after a first preset time, wherein the target terminal is a terminal located at the first target geographical location; or

[0298] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0299] Optionally, the first sending unit 1001 is configured to:

[0300] Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message;

[0301] The context information of the target terminal is sent to the onboard network device.

[0302] Optionally, the context information of the target terminal includes at least one of the following:

[0303] Identification information of the target terminal;

[0304] Business information of the target terminal;

[0305] Battery storage information of the target terminal;

[0306] Geographical location information of the target terminal.

[0307] It should be noted that the device embodiment is a device that corresponds one-to-one to the above-mentioned method embodiment. All implementation methods in the above-mentioned method embodiment are applicable to the device embodiment and can achieve the same technical effect.

[0308] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a 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.

[0309] 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 processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0310] The present application also provides a core network device. The structure of the core network device can be found in Fig. 9 As shown, no further details are given here.

[0311] The processor is used to read the computer program in the memory and perform the following operations:

[0312] When determining, based on the ephemeris information, that the onboard network device is able to provide coverage and / or service for a first target geographical location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographical location; or

[0313] In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

[0314] In some embodiments, the processor is configured to read the computer program in the memory and perform the following operations:

[0315] Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message;

[0316] The context information of the target terminal is sent to the onboard network device.

[0317] In some embodiments, the context information of the target terminal includes at least one of the following:

[0318] Identification information of the target terminal;

[0319] Business information of the target terminal;

[0320] Battery storage information of the target terminal;

[0321] Geographical location information of the target terminal.

[0322] It should be noted here that the above-mentioned core network device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0323] The embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the information transmission method applied to a core network device. The processor-readable storage medium may be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0324] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0325] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0326] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0327] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0328] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An information transmission method, characterized in that: Executed by onboard network equipment, including: Receiving context information of the target terminal sent by the core network device; The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location; Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

2. The method according to claim 1, characterized in that In the case where the context information is sent by the core network device according to a context request message of the on-board network device, the method further includes: When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal; The target condition includes at least one of the following: The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time; The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location; The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location; The target terminal is a terminal located at the second target geographical location.

3. The method according to claim 2, characterized in that Also includes at least one of the following: determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time; According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

4. The method according to claim 3, characterized in that The determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time includes: If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

5. The method according to claim 3, characterized in that: The determining, according to whether the reference point of the service cell of the on-board network device enters the second target geographical location, whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time includes: If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

6. The method according to claim 2, characterized in that The context request message carries the location information of the second target geographic location or the identification information of the target terminal.

7. The method according to claim 1, characterized in that The context information of the target terminal includes at least one of the following: Identification information of the target terminal; Business information of the target terminal; Battery storage information of the target terminal; Geographical location information of the target terminal.

8. An information transmission method, characterized in that: Executed by core network equipment, including: When determining, based on the ephemeris information, that the onboard network device is able to provide coverage and / or service for a first target geographical location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographical location; or In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

9. The method according to claim 8, characterized in that The step of sending the context information of the target terminal to the on-board network device upon receiving the context request message sent by the on-board network device comprises: Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message; The context information of the target terminal is sent to the onboard network device.

10. The method according to claim 8, characterized in that The context information of the target terminal includes at least one of the following: Identification information of the target terminal; Business information of the target terminal; Battery storage information of the target terminal; Geographical location information of the target terminal.

11. An on-board network device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Receiving, through the transceiver, context information of the target terminal sent by the core network device; The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location; Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

12. The satellite network device according to claim 11, characterized in that: In a case where the context information is sent by the core network device according to a context request message of the onboard network device, the processor is configured to read the computer program in the memory and further perform the following operations: When the target condition is met, sending a context request message to the core network device, wherein the context request message is used to request context information of the target terminal; The target condition includes at least one of the following: The onboard network device is capable of providing coverage and / or service for a second target geographical location after a second preset time; The coverage and / or service range of the on-board network device determined according to the ephemeris of the on-board network device covers the second target geographical location; The real-time moment of the on-board network device reaches a first moment, where the first moment is a moment when the on-board network device can provide coverage and / or service for the second target geographical location; The target terminal is a terminal located at the second target geographical location.

13. The satellite network device according to claim 12, characterized in that: The processor is configured to read the computer program in the memory and further perform at least one of the following operations: determining, according to whether the sub-satellite point corresponding to the on-satellite network device enters the second target geographical location, whether the on-satellite network device can provide coverage and / or service for the second target geographical location after a second preset time; According to whether the reference point of the service cell of the on-board network device enters the second target geographical location, it is determined whether the on-board network device can provide coverage and / or service for the second target geographical location after a second preset time.

14. The satellite network device according to claim 13, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: If the distance between the sub-satellite point corresponding to the on-satellite network device and the reference position of the second target geographic location is less than or equal to the first distance threshold, it is determined that the on-satellite network device can provide coverage and / or service for the second target geographic location after a second preset time.

15. The satellite network device according to claim 13, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: If the distance between the reference point of the service cell of the onboard network device and the reference position of the second target geographic location is less than or equal to the second distance threshold, it is determined that the onboard network device can provide coverage and / or service for the second target geographic location after a second preset time.

16. The satellite network device according to claim 12, characterized in that: The context request message carries the location information of the second target geographic location or the identification information of the target terminal.

17. The satellite network device according to claim 11, characterized in that: The context information of the target terminal includes at least one of the following: Identification information of the target terminal; Business information of the target terminal; Battery storage information of the target terminal; Geographical location information of the target terminal.

18. A core network device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: When determining, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, sending context information of a target terminal to the onboard network device, the target terminal being a terminal located at the first target geographical location; or In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

19. The core network device according to claim 18, characterized in that: The processor is configured to read the computer program in the memory and perform the following operations: Acquire context information of the target terminal according to the location information of the second target geographical location or the identification information of the target terminal carried in the context request message; The context information of the target terminal is sent to the onboard network device.

20. The core network device according to claim 18, characterized in that: The context information of the target terminal includes at least one of the following: Identification information of the target terminal; Business information of the target terminal; Battery storage information of the target terminal; Geographical location information of the target terminal.

21. An information transmission device, applied to satellite network equipment, characterized in that: include: A receiving unit, configured to receive context information of a target terminal sent by a core network device; The context information is sent when the core network device determines, based on the ephemeris information, that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, and the target terminal is a terminal located at the first target geographical location; Alternatively, the context information is sent by the core network device according to a context request message of the on-board network device, and the target terminal has not established a radio resource control RRC connection with the on-board network device.

22. An information transmission device, applied to a core network device, characterized in that: include: A first sending unit is configured to send context information of a target terminal to the onboard network device when it is determined according to the ephemeris information that the onboard network device can provide coverage and / or service for a first target geographical location after a first preset time, wherein the target terminal is a terminal located at the first target geographical location; or In case of receiving a context request message sent by an on-satellite network device, context information of a target terminal is sent to the on-satellite network device, and no radio resource control RRC connection is established between the target terminal and the on-satellite network device.

23. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method according to any one of claims 1 to 10.

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