Satellite call flow establishment method, apparatus, and non-transitory storage medium

Abstract

The application discloses a satellite call flow establishment method and device and a nonvolatile storage medium. The method comprises the following steps: a core network element acquires call establishment information sent by a calling terminal through a first access network, wherein the first access network comprises a communication satellite; the core network element determines a called terminal according to the call establishment information, and determines a beam in which the called terminal is located; and the core network element sends a paging instruction to a second access network corresponding to the called terminal without completing wireless access bearer allocation with the calling terminal, wherein the second access network comprises a communication satellite. The application solves the technical problem of poor user experience caused by the large time delay of the satellite communication call establishment flow in the related art.

Description

Technical Field

[0001] This application relates to the field of satellite communications, and more specifically, to a method, apparatus, and non-volatile storage medium for establishing a satellite call process. Background Technology

[0002] Satellite communication systems, as a widely covered communication network, enable wireless communication between any two points on the Earth's surface. They are suitable for areas with limited terrestrial infrastructure or harsh geographical environments, and can meet users' communication needs. However, the existing satellite communication call setup process has a relatively large latency, resulting in a poor user experience.

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

[0004] This application provides a satellite call setup method, apparatus, and non-volatile storage medium to at least solve the technical problem of poor user experience caused by the large delay in satellite communication call setup processes in related technologies.

[0005] According to one aspect of the embodiments of this application, a satellite call establishment method is provided, comprising: a core network element obtaining call establishment information sent by a calling terminal through a first access network, wherein the first access network includes a communication satellite; the core network element determining a called terminal based on the call establishment information and determining the beam in which the called terminal is camped; and the core network element sending a paging command to a second access network corresponding to the called terminal without completing the radio access bearer allocation with the calling terminal, wherein the second access network includes a communication satellite.

[0006] Optionally, after sending a paging command to the second access network corresponding to the called terminal, the method further includes: determining a preset duration; if no response information is received from the calling terminal within the preset duration, terminating the call establishment process of the called terminal, wherein the response information is used to indicate that the radio access bearer allocation of the calling terminal is completed.

[0007] Optionally, terminating the call establishment process of the called terminal includes: after a preset time, when the core network element receives a paging response message sent by the called terminal, the core network element discards the paging response message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0008] Optionally, terminating the call establishment process of the called terminal includes: after a preset time period, when the core network element has sent an authentication request message to the called terminal, the core network element discards the authentication response message sent by the called terminal in response to the authentication request message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0009] Optionally, terminating the call establishment process of the called terminal includes: after a preset duration, when the core network element has sent a security mode command message to the called terminal, the core network element discards the security mode command response message sent by the called terminal in response to the security mode command message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0010] Optionally, terminating the call setup process of the called terminal includes: after a preset time period, when the core network element has sent a call setup message to the called terminal, the core network element discards the call setup response message sent by the called terminal in response to the call setup message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call setup process.

[0011] Optionally, terminating the call establishment process of the called terminal includes: after a preset duration, when the core network element completes the radio access bearer allocation process for the called terminal, the core network element discards the ringing message sent by the called terminal, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0012] According to another aspect of the embodiments of this application, a satellite call setup apparatus is also provided, applicable to a core network element, comprising: a first processing module, configured to obtain call setup information sent by a calling terminal through a first access network, wherein the first access network includes a communication satellite; a second processing module, configured to determine a called terminal based on the call setup information, and determine the beam in which the called terminal camps; and a third processing module, configured to send a paging command to a second access network corresponding to the called terminal when no radio access bearer allocation has been completed with the calling terminal, wherein the second access network includes a communication satellite.

[0013] According to another aspect of the embodiments of this application, a non-volatile storage medium is also provided, wherein a program is stored in the non-volatile storage medium, wherein the program controls the device where the non-volatile storage medium is located to execute a satellite call process establishment method when it runs.

[0014] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory and a processor, the processor being configured to run a program stored in the memory, wherein the program executes a satellite call process establishment method during runtime.

[0015] According to another aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements a method for establishing a satellite call process.

[0016] In this embodiment, a core network element obtains call setup information sent by the calling terminal through a first access network, wherein the first access network includes a communication satellite. The core network element determines the called terminal based on the call setup information and determines the beam on which the called terminal camps. Without completing the radio access bearer allocation with the calling terminal, the core network element sends a paging command to the second access network corresponding to the called terminal, wherein the second access network includes a communication satellite. By initiating the called paging process in advance after the core network element receives the calling setup message, the calling RAB assignment and the called paging are processed in parallel, thereby accelerating the call setup process and reducing the latency of the call setup process. This solves the problem of poor user experience caused by the large latency of satellite communication call setup processes in related technologies. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of a traditional Tiantong satellite terminal call setup process based on relevant technologies;

[0019] Figure 2 This is a schematic diagram of the structure of a computer terminal according to an embodiment of this application;

[0020] Figure 3 This is a flowchart illustrating a satellite call process establishment method provided in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of a Tiantong satellite terminal call setup process according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of a timer startup process provided according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of a satellite call process establishment device provided according to an embodiment of this application. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] To better understand the embodiments of this application, the technical terms involved in the embodiments of this application are explained below:

[0027] RAB (Radio Access Bearer Assignment): In mobile communication systems, RAB assignment is a critical network resource management process. A RAB is a logical connection used to carry user data (such as voice, video, or data packets), defining the radio bearer characteristics between the mobile terminal (UE) and the radio access network (RAN). When a user initiates a service request, the RAB assignment process is initiated by the core network (CN) to allocate appropriate radio resources for the user's specific service needs.

[0028] In related technologies, the call establishment process of the Tiantong satellite terminal is as follows: Figure 1 As shown, this includes: the calling terminal completing RAB allocation between the core network (…). Figure 1 In the middle process (steps 1 to 21), the core network initiates the called party paging process ( Figure 1 In procedures 22 to 28, the called terminal and the core network perform authentication interactions, including receiving authentication requests, sending authentication responses, and establishing and confirming security modes. Figure 1In the middle steps (29 to 36), the core network sends a call confirmation to the called GSC and initiates the RAB assignment process to complete the initial call establishment. Figure 1 In process steps 37 to 44, the called terminal sends a ringing message, and the core network notifies the calling terminal to begin the ringing process. Figure 1 In the middle steps (45 to 48), after the called terminal answers the phone, the core network exchanges confirmation of connection with both the calling and called terminals until the call is established. Figure 1 In steps 49 to 56, the calling terminal and the called terminal complete the connection confirmation and enter the call state. Figure 1 (Process 57)

[0029] The specific process includes:

[0030] 1: The calling terminal sends an RRC connection request message (RRC CONNECTION REQUEST) to the calling GSC (first access network);

[0031] 2: After receiving the link establishment request message, the calling GSC sends an RRC CONNECTION SETUP message to the calling terminal, transmitting the radio link parameters to the calling terminal;

[0032] 3: After receiving the connection establishment message, the calling terminal establishes a dedicated signaling connection according to the radio link parameters, and then sends a connection establishment completion message RRC CONNECTION SETUP COMPLETE to the calling GSC;

[0033] 4: After the calling terminal sends the connection establishment completion message, it immediately sends the initial direct transfer message INITIAL DIRECTTRANSFER to the calling GSC, which carries the CM Service Request message of the NAS layer.

[0034] 5: After receiving the initial direct transmission message, the calling GSC begins to establish an Iu connection, and then sends an INITIAL UE MESSAGE to the core network CN;

[0035] 6: The core network initiates an authentication request and sends a DIRECT TRANSFER to the calling GSC, which carries an Authentication Request message from the MM layer.

[0036] 7: The calling GSC sends the authentication message to the calling terminal via the downlink direct transfer message (DOWNLINK DIRECT TRANSFER);

[0037] 8: The calling terminal sends an uplink direct transfer message to the calling GSC, which carries a NAS layer authentication response message.

[0038] 9: The calling GSC sends the Authentication Response message to the core network CN via DIRECT TRANSFER;

[0039] 10: After the core network receives the authentication response message and successfully authenticates, it initiates the security mode control process and sends the SECURITY MODE COMMAND to the calling GSC;

[0040] 11: The calling GSC sends the SECURITY MODE COMMAND message to the calling terminal;

[0041] 12: The calling terminal replies with a SECURITY MODE COMPLETE message to the calling GSC;

[0042] 13: The calling GSC sends SECURITY MODE COMPLETE to the core network CN to complete the security mode control process;

[0043] 14: The calling terminal sends an uplink direct transfer message UPLINK DIRECT TRANSFER to the calling GSC, which carries the NAS layer call message Setup;

[0044] 15: The calling GSC carries the call message Setup through DIRECT TRANSFER and sends it to the core network CN;

[0045] 16: The core network responds to the call in progress by sending a DIRECT TRANSFER to the calling GSC, which carries the CC layer message Call Proceeding;

[0046] 17: The calling GSC sends a Call Proceeding message to the calling terminal via a Downlink Direct Transmission message;

[0047] 18: The core network initiates the RAB assignment process and sends a RAB ASSIGNMENT REQUEST to the calling GSC;

[0048] 19: The calling GSC sends the RB link establishment message "RADIO BEARER SETUP" to the calling terminal;

[0049] 20: The calling terminal replies with the RB connection establishment complete message to the calling GSC;

[0050] 21: The calling GSC sends a RAB ASSIGNMENT RESPONSE to the core network CN to complete the RAB assignment process;

[0051] 22: After the core network finds the beam where the called party is camped, it sends a PAGE to the called party's GSC (secondary access network);

[0052] 23: The called GSC sends a paging type 4 message to the called terminal;

[0053] 24: After receiving the paging message, the called terminal sends an RRC Connection Request message to the called GSC;

[0054] 25: After receiving the connection establishment request message, the called GSC sends an RRC Connection Setup message to the called terminal, transmitting the radio link parameters to the called terminal.

[0055] 26: After receiving the connection establishment message, the called terminal establishes a dedicated signaling connection according to the radio link parameter indication, and then sends a connection establishment complete message (RRC Connection Setup Complete) to the called GSC.

[0056] 27: After the called terminal sends the connection establishment completion message, it immediately sends an Initial DirectTransfer message to the called GSC, which carries a CM Service Request message from the NAS layer.

[0057] 28: After receiving the initial direct transmission message, the called GSC begins to establish an Iu connection and then sends the INITIAL UEMESSAGE to the core network CN;

[0058] 29: The core network initiates an authentication request and sends a DIRECT TRANSFER to the called GSC, which carries an Authentication Request message from the MM layer.

[0059] 30: The called GSC sends the authentication message to the called terminal via Downlink Direct Transfer;

[0060] 31: The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer authentication response message.

[0061] 32: The called GSC sends the Authentication Response message to the core network CN via the DIRECT TRANSFER;

[0062] 33: After the core network receives the authentication response message and successfully authenticates, it initiates the security mode control process and sends the SECURITY MODE COMMAND to the called GSC;

[0063] 34: The called GSC sends a SECURITY MODE COMMAND message to the called terminal;

[0064] 35: The called terminal replies with a SECURITY MODE COMPLETE message to the called GSC;

[0065] 36: The called GSC sends SECURITY MODE COMPLETE to the core network CN to complete the security mode control process;

[0066] 37: The core network (CN) sends the call message Setup via DIRECT TRANSFER to the called GSC;

[0067] 38: The called GSC sends a Downlink Direct Transfer message to the called terminal, which carries a CC layer call message Setup;

[0068] 39: The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer call confirmation message.

[0069] 40: The called GSC sends the Call Confirmed message to the core network CN via DIRECT TRANSFER;

[0070] 41: The core network initiates the RAB assignment process and sends a RAB ASSIGNMENT REQUEST to the called GSC;

[0071] 42: The called GSC sends an RB Setup message to the called terminal;

[0072] 43: The called terminal replies with an RB Setup Complete message to the called GSC;

[0073] 44: The called GSC sends a RAB ASSIGNMENT RESPONSE to the core network CN to complete the RAB assignment process;

[0074] 45: The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer ringing message Alerting;

[0075] 46: The called GSC sends the ringing message Alerting to the core network CN via DIRECT TRANSFER;

[0076] 47: After the core network receives the ringing message from the called terminal, it sends a DIRECT TRANSFER to the calling GSC, which carries the CC layer ringing message Alerting.

[0077] 48: The calling GSC sends the ringing message Alerting to the calling terminal via the downlink direct transfer message DOWNLINK DIRECT TRANSFER;

[0078] 49: After the called terminal answers the call, it sends an uplink direct transfer message UPLINK DIRECT TRANSFER to the called GSC, which carries a NAS layer off-hook message Connect.

[0079] 50: The called GSC sends the off-hook message Connect via DIRECT TRANSFER to the core network CN;

[0080] 51: After the core network receives the off-hook message from the called party, it sends a DIRECT TRANSFER to the calling party's GSC, which carries the CC layer off-hook message Connect.

[0081] 52: The calling GSC sends the off-hook message Connect to the calling terminal via the downlink direct transfer message DOWNLINK DIRECT TRANSFER;

[0082] 53: The calling terminal sends an uplink direct transfer message UPLINK DIRECT TRANSFER to the GSC, which carries a NAS layer off-hook confirmation message Connect ACK;

[0083] 54: The calling GSC sends a Connect ACK message to the core network CN via DIRECT TRANSFER;

[0084] 55: After the core network receives the off-hook confirmation message from the calling terminal, it sends a DIRECT TRANSFER to the called GSC, which carries a CC layer off-hook confirmation message Connect ACK.

[0085] 56: The called GSC sends a Connect ACK message to the called terminal via the downlink direct transfer message DOWNLINK DIRECT TRANSFER;

[0086] 57: The calling terminal and the called terminal begin the call process.

[0087] Because in the above process, the calling party's call initiation process and the called party's paging initiation process are sequential, that is, the calling terminal and the core network complete the RAB allocation ( Figure 1 The called party paging process is only initiated after steps 1 to 21 in the middle process. Figure 1 (Processes 22 to 27) However, the initiation of the paging process by the called party does not actually depend on the completion of the RAB assignment by the calling party. The unnecessary waiting for the RAB assignment by the calling party causes greater latency in the call setup process in the Tiantong satellite system, reducing the user experience.

[0088] To address the aforementioned issues, this application provides relevant solutions, which are detailed below.

[0089] According to an embodiment of this application, a method embodiment for establishing a satellite call process is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0090] The methods and embodiments provided in this application can be executed on mobile terminals, computer terminals, or similar computing devices. Figure 2 A hardware block diagram of a computer terminal for implementing a satellite call process establishment method is shown. Figure 2 As shown, the computer terminal 20 may include one or more processors 202 (shown as 202a, 202b, ..., 202n in the figure) 202 (processor 202 may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 204 for storing data, and a transmission device 206 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 2 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, computer terminal 20 may also include... Figure 2 The more or fewer components shown, or having the same Figure 2 The different configurations shown.

[0091] It should be noted that the aforementioned one or more processors 202 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element within the computer terminal 20. As involved in the embodiments of this application, the data processing circuits serve as processor control (e.g., selection of a variable resistor termination path connected to an interface).

[0092] The memory 204 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the satellite call process establishment method in this embodiment. The processor 202 executes various functional applications and data processing by running the software programs and modules stored in the memory 204, thereby realizing the aforementioned satellite call process establishment method. The memory 204 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 204 may further include memory remotely located relative to the processor 202, and these remote memories can be connected to the computer terminal 20 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0093] The transmission device 206 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the computer terminal 20. In one example, the transmission device 206 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 206 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0094] The display may be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 20.

[0095] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, or 5G system, etc.

[0096] For example, the communication system used in this application embodiment may include a network device, which may be a device that communicates with a terminal device (or a communication terminal, terminal). The network device can provide communication coverage for a specific geographical area and can communicate with terminal devices located within that coverage area. Optionally, the network device may be a base station (BTS) in a GSM or CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a radio controller in a Cloud Radio Access Network (CRAN). Alternatively, the network device may be a mobile switching center, relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, network-side equipment in a 5G network, or network equipment in a future evolved Public Land Mobile Network (PLMN), etc.

[0097] The communication system also includes at least one terminal device located within the coverage area of ​​the network equipment. As used herein, "terminal device" includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM radio transmitters; and / or other terminal devices configured to communicate via wireless interfaces. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communications system (PCS) terminals that can combine cellular radiotelephony with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, user terminals, terminals, wireless communication equipment, user agents, or user equipment. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in future PLMNs, etc.

[0098] Optionally, terminal devices can communicate with each other via device-to-device (D2D) communication.

[0099] Alternatively, a 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0100] Under the aforementioned operating environment, this application provides a method for establishing a satellite call process, such as... Figure 3 As shown, the method includes the following steps:

[0101] In step S302, the core network element obtains the call setup information sent by the calling terminal through the first access network, wherein the first access network includes communication satellites.

[0102] Optionally, Figure 4 This application illustrates a call setup process for a Tiantong satellite terminal, such as... Figure 4 As shown, before the core network element obtains the call setup information sent by the calling terminal through the first access network, the process also includes:

[0103] 1. The calling terminal sends an RRC (Radio Resource Control) connection request message (RRCCONNECTION REQUEST) to the calling GSC (i.e., the first access network);

[0104] 2. After receiving the link establishment request message, the calling GSC sends an RRC CONNECTION SETUP message to the calling terminal, transmitting the radio link parameters to the calling terminal.

[0105] 3. After receiving the link establishment message, the calling terminal establishes a dedicated signaling connection according to the radio link parameters, and then sends a link establishment completion message (RRC CONNECTION SETUP COMPLETE) to the calling GSC.

[0106] 4. After the calling terminal sends the connection establishment completion message, it immediately sends the initial direct transfer message INITIAL DIRECTTRANSFER to the calling GSC, which carries the CM Service Request message of the NAS layer.

[0107] 5. After receiving the initial direct transmission message, the calling GSC begins to establish an Iu connection (Interface-U connection) and then sends an INITIAL UE MESSAGE to the core network CN;

[0108] 6. The core network (network element) initiates an authentication request and sends a DIRECT TRANSFER to the calling GSC, which carries an Authentication Request message from the MM layer.

[0109] 7. The calling GSC sends an authentication message to the calling terminal via the downlink direct transfer message (DOWNLINK DIRECT TRANSFER);

[0110] 8. The calling terminal sends an uplink direct transfer message to the calling GSC, which carries a NAS layer authentication response message.

[0111] 9. The calling GSC sends the Authentication Response message to the core network CN via the DIRECT TRANSFER.

[0112] 10. After the core network receives the authentication response message and successfully authenticates, it initiates the security mode control process and sends the SECURITY MODE COMMAND to the calling GSC;

[0113] 11. The calling GSC sends the SECURITY MODE COMMAND message to the calling terminal;

[0114] 12. The calling terminal replies with a SECURITY MODE COMPLETE message to the calling GSC;

[0115] 13. The calling GSC sends SECURITY MODE COMPLETE to the core network CN to complete the security mode control process;

[0116] 14. The calling terminal sends an uplink direct transfer message (UPLINK DIRECT TRANSFER) to the calling GSC, which carries the NAS layer call message Setup.

[0117] Optionally, such as Figure 4 As shown in step 15, the core network element obtains the call setup information sent by the calling terminal through the first access network, including: the calling GSC (i.e., the first access network) carries the call message Setup (i.e., call setup information) through DIRECT TRANSFER and sends it to the core network CN (i.e., the core network element).

[0118] In step S304, the core network element determines the called terminal based on the call setup information and determines the beam on which the called terminal camps.

[0119] Optionally, such as Figure 4As shown in step 16, the core network element determines the called terminal based on the call setup information and determines the beam in which the called terminal camps. This includes: after the core network element receives the calling side Setup message (call setup information, including key information required for call setup, such as the identifier of the called terminal) from the calling side, it determines the called terminal through the call setup information, determines the beam in which the called terminal camps by searching, and sends a RANNAP (Radio Access Network Application Part Message) message PAGE (Packet Paging Message) to the called GSC (i.e., the second access network).

[0120] In step S306, if the core network element has not completed the radio access bearer allocation with the calling terminal, it sends a paging command to the second access network corresponding to the called terminal, wherein the second access network includes communication satellites.

[0121] Optionally, such as Figure 4 As shown in steps 17-44, after the calling side sends the call setup information, the core network element sends a paging command to the second access network corresponding to the called terminal. The radio access bearer allocation process after the calling side sends the call setup information and the process of the called terminal initiating paging are carried out simultaneously, instead of waiting for the core network and the calling terminal to complete the RAB assignment process before initiating paging, thus saving connection establishment time.

[0122] Optionally, Figure 4 Steps 17-44 in the middle section specifically include:

[0123] 17. The called GSC sends a paging type 4 message to the called terminal;

[0124] 18. The core network responds to the call in progress by sending a DIRECT TRANSFER to the calling GSC, which carries the CC layer message Call Proceeding.

[0125] 19. After receiving the paging message, the called terminal sends an RRC Connection Request message to the called GSC;

[0126] 20. The calling GSC sends a Call Proceeding message to the calling terminal via a downlink direct transfer message (DOWNLINK DIRECT TRANSFER).

[0127] 21. After receiving the connection establishment request message, the called GSC sends an RRC Connection Setup message to the called terminal, transmitting the radio link parameters to the called terminal.

[0128] 22. The core network initiates the RAB assignment process and sends a RAB ASSIGNMENT REQUEST to the calling GSC;

[0129] 23. After receiving the connection establishment message, the called terminal establishes a dedicated signaling connection according to the radio link parameters, and then sends a connection establishment complete message (RRC Connection Setup Complete) to the called GSC.

[0130] 24. The calling GSC sends an RB connection establishment message, RADIO BEARER SETUP, to the calling terminal;

[0131] 25. After the called terminal sends the connection establishment completion message, it immediately sends an Initial DirectTransfer message to the called GSC, which carries a CM Service Request message from the NAS layer.

[0132] 26. The calling terminal replies with an RB connection establishment complete message to the calling GSC;

[0133] 27. The calling GSC sends a RAB ASSIGNMENT RESPONSE to the core network CN to complete the RAB assignment process;

[0134] 28. After receiving the initial direct transmission message, the called GSC begins to establish an Iu connection and then sends the INITIAL UEMESSAGE to the core network CN;

[0135] 29. The core network initiates an authentication request and sends a DIRECT TRANSFER to the called GSC, which carries an Authentication Request message from the MM layer.

[0136] 30. The called GSC sends the authentication message to the called terminal via a Downlink Direct Transfer message;

[0137] 31. The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer authentication response message.

[0138] 32. The called GSC sends the Authentication Response message to the core network CN via the DIRECT TRANSFER;

[0139] 33. After the core network receives the authentication response message and successfully authenticates, it initiates the security mode control process and sends the SECURITY MODE COMMAND to the called GSC.

[0140] 34. The called GSC sends a SECURITY MODE COMMAND message to the called terminal;

[0141] 35. The called terminal replies with a SECURITY MODE COMPLETE message to the called GSC;

[0142] 36. The called GSC sends SECURITY MODE COMPLETE to the core network CN to complete the security mode control process;

[0143] 37. The core network (CN) sends the call message Setup via DIRECT TRANSFER to the called GSC;

[0144] 38. The called GSC sends a Downlink Direct Transfer message to the called terminal, which carries a CC layer call message Setup;

[0145] 39. The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer call confirmation message.

[0146] 40. The called GSC sends the Call Confirmed message to the core network CN via DIRECT TRANSFER;

[0147] 41. The core network initiates the RAB assignment process and sends a RAB ASSIGNMENT REQUEST to the called GSC;

[0148] 42. The called GSC sends an RB Setup message to the called terminal;

[0149] 43. The called terminal replies with an RB Setup Complete message to the called GSC;

[0150] 44. The called GSC sends a RAB ASSIGNMENT RESPONSE to the core network CN to complete the RAB assignment process;

[0151] Optionally, such as Figure 4As shown in steps 45-57, after the calling side completes RAB assignment and the called side successfully completes paging, the process also includes the called terminal sending a ringing message, the core network notifying the calling terminal to start the ringing process, and after the called terminal answers the phone, the core network interacts with the calling and called terminals to confirm the connection until the call is established. The calling and called terminals then complete the connection confirmation and enter the call state.

[0152] 45. The called terminal sends an Uplink Direct Transfer message to the called GSC, which carries a NAS layer ringing message Alerting;

[0153] 46. ​​The called GSC carries the ringing message Alerting through DIRECT TRANSFER and sends it to the core network CN;

[0154] 47. After the core network receives the ringing message from the called terminal, it sends a DIRECT TRANSFER to the calling GSC, which carries the CC layer ringing message Alerting.

[0155] 48. The calling GSC sends the ringing message Alerting to the calling terminal via the downlink direct transfer message DOWNLINK DIRECT TRANSFER;

[0156] 49. After the called terminal answers the call, it sends an uplink direct transfer message to the called GSC, which carries a NAS layer off-hook message Connect.

[0157] 50. The called GSC sends the off-hook message Connect via DIRECT TRANSFER to the core network CN;

[0158] 51. After the core network receives the off-hook message from the called party, it sends a DIRECT TRANSFER to the calling party's GSC, which carries the CC layer off-hook message Connect.

[0159] 52. The calling GSC sends the off-hook message Connect to the calling terminal via the downlink direct transfer message DOWNLINK DIRECT TRANSFER;

[0160] 53. The calling terminal sends an uplink direct transfer message (UPLINK DIRECT TRANSFER) to the GSC, which carries a NAS layer off-hook confirmation message (Connect ACK).

[0161] 54. The calling GSC sends a Connect ACK message, carrying the off-hook confirmation message, to the core network CN via DIRECT TRANSFER;

[0162] 55. After the core network receives the off-hook confirmation message from the calling terminal, it sends a DIRECT TRANSFER to the called GSC, which carries a CC layer off-hook confirmation message Connect ACK.

[0163] 56. The called GSC sends a Connect ACK message to the called terminal via a downlink direct transfer message (DOWNLINK DIRECT TRANSFER);

[0164] 57. The calling terminal and the called terminal begin the call process.

[0165] In the technical solution provided in step S306, after sending a paging command to the second access network corresponding to the called terminal, the method further includes: determining a preset duration; if no response information is received from the calling terminal within the preset duration, terminating the call establishment process of the called terminal, wherein the response information is used to indicate that the radio access bearer allocation of the calling terminal is completed.

[0166] Optionally, Figure 5 A schematic diagram of a process for starting a timer (with a preset duration) is shown (its process 1-22 is similar to...). Figure 4 Processes 1-22 correspond to processes 23-43. Figure 4 (The correspondences for numbers 23, 25, and 28-46 are not detailed here.) Figure 5 As shown, after sending a paging command to the second access network corresponding to the called terminal, a protection timer T1 is set in the core network control of the calling side RAB assignment process. If no response information is received from the calling side after T1 expires (used to indicate that the radio access bearer allocation of the calling terminal is completed), it indicates that the calling side RAB assignment is abnormal and the calling side's abnormality handling needs to be performed. Since the calling side's call initiation process and the called side's paging initiation process are parallel in this application, the core network has already sent the RANNAP message PAGE to the called GSC. Therefore, the core network not only needs the original calling side abnormality handling, but also needs to perform called side abnormality handling, that is, terminate the called terminal's call establishment process.

[0167] As an optional implementation, terminating the call establishment process of the called terminal includes: after a preset time period, when the core network element receives a paging response message sent by the called terminal, the core network element discards the paging response message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0168] Optionally, if the core network element receives a Paging Response message sent by the called terminal after T1 timeout (i.e., after the preset duration), the core network discards the message, releases the terminal's (called terminal's) RRC connection and other resources through the second access network, terminates the call establishment process, and does not initiate called authentication or subsequent called-side processes.

[0169] As an optional implementation, terminating the call establishment process of the called terminal includes: after a preset time period, when the core network element has sent an authentication request message to the called terminal, the core network element discards the authentication response message sent by the called terminal in response to the authentication request message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0170] Optionally, if the core network has already received the called party's Paging Response message and sent an Authentication Request message when T1 times out, then when the core network subsequently receives the called party's Authentication Response message, it will discard the message, release terminal RRC connection and other resources through the second access network, terminate the call establishment process, and not initiate the called party's SMC and subsequent called party processes.

[0171] As an optional implementation, terminating the call establishment process of the called terminal includes: after a preset duration, when the core network element has sent a security mode command message to the called terminal, the core network element discards the security mode command response message sent by the called terminal in response to the security mode command message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0172] Optionally, if the core network has already received the called party's Authentication Response message and sent the SMC message (Security Mode Command message) when T1 times out, then when the core network subsequently receives the called party's SMC completion message (Security Mode Command Response message), it will discard the message, release terminal RRC connection and other resources through the access network, terminate the call establishment process, and not initiate the called party's Setup message and subsequent called party processes.

[0173] As an optional implementation, terminating the call setup process of the called terminal includes: after a preset time period, when the core network element has sent a call setup message to the called terminal, the core network element discards the call setup response message sent by the called terminal in response to the call setup message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call setup process.

[0174] Optionally, if the core network has already received the called party's SMC completion message and sent the Setup message (call setup message) when T1 times out, then when the core network subsequently receives the called party's Call Confirmed message (call setup response message), it will discard the message, release terminal RRC connection and other resources through the access network, terminate the call setup process, and not initiate called party RAB assignment and subsequent called party processes.

[0175] As an optional implementation, terminating the call establishment process of the called terminal includes: after a preset time period, when the core network element completes the radio access bearer allocation process for the called terminal, the core network element discards the ringing message sent by the called terminal, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0176] Optionally, if the core network has completed the called party's RAB assignment process (radio access bearer allocation process) when T1 times out, then when the core network subsequently receives the called party's Alerting message (ringing message), it discards the message, releases terminal RRC connection and other resources through the access network, terminates the call establishment process, and does not initiate an Alerting ringing process to the calling terminal.

[0177] As an alternative implementation, taking an emergency rescue communication scenario as an example, in this scenario, rapidly establishing a communication link is crucial for the timeliness and effectiveness of rescue operations. According to the traditional process, when a rescue team (calling terminal) initiates a call to the command center (called terminal), the signaling must be completed serially from the calling terminal to the calling GSC, then to the core network, and subsequent authentication, security control, and resource allocation processes, which may result in a long call setup delay. However, using the implementation method of this application, after receiving the Setup message from the calling terminal, the core network immediately initiates a Paging process to the called GSC (the beam where the command center is located), instead of waiting for RAB assignment to complete. This change enables the parallel execution of the calling-side RAB assignment and the called-side Paging process, significantly accelerating the processing speed of call signaling and shortening the call setup time. Under normal circumstances, the entire call setup process takes about 25 seconds, but by adopting the technical solution of this invention, about 4 seconds can be saved. This means that in emergency rescue scenarios, the communication between the rescue team and the command center can be established 16% earlier, which is a very valuable time saving for rescue operations where every second counts.

[0178] Furthermore, this application also considers the signaling fallback process under abnormal scenarios. The core network element sets a dynamic timer T1 for monitoring. If an anomaly occurs during the calling party's RAB assignment process, it will cause T1 to time out. After T1 timeout, the core network will send signaling to the called party's GSC according to the current stage of the process, instructing it to release the allocated resources and suspend any ongoing signaling interaction processes to prevent invalid signaling from continuing to occupy satellite channel resources and to avoid unnecessary interference to the called terminal. This mechanism ensures that even in the face of unforeseen network failures, the system can quickly recover to normal status without affecting other ongoing or subsequent calls.

[0179] Through the above steps, the called party paging process is initiated in advance by the core network element, and the calling party's RAB assignment and the called party's paging process are carried out in parallel, which can accelerate call setup. Specifically, the method embodiment of this application has the following advantages:

[0180] 1. RAB assignment on the calling side and paging process on the called side proceed in parallel: The timing of initiating the called paging process on the core network side is advanced. After receiving the setup message from the calling side, the core network immediately initiates the called paging process, instead of waiting for the core network and the calling terminal to complete the RAB assignment process. After receiving the RAB assignment completion message from the calling side, the core network no longer needs to initiate paging, because the called paging process has already been initiated in advance. In related technologies, the entire call setup process takes about 25 seconds. Using the optimization method of the embodiment of this application, the Tiantong satellite core network element sends the called paging request in advance, which can speed up the call setup process and save about 4 seconds, that is, 16% of the time, which can significantly improve the user experience.

[0181] 2. Ensure communication process security: When the core network receives the calling party's Setup message, it has already completed the calling party authentication process, ensuring the calling party's legitimacy and preventing security issues. Furthermore, it provides a robust fallback strategy for the called party's signaling in cases of abnormal RAB assignment processes on the calling party side. This ensures that unnecessary signaling processing on the called party side can be terminated in a timely manner, avoiding the occupation of system resources due to invalid operations, thereby improving the overall stability of network operation and reducing resource waste.

[0182] This application provides a satellite call process establishment device, applicable to core network elements. Figure 6 This is a schematic diagram of the device, as shown below. Figure 6As shown, the device includes: a first processing module 60, used to obtain call setup information sent by the calling terminal through a first access network, wherein the first access network includes communication satellites; a second processing module 62, used to determine the called terminal based on the call setup information, and determine the beam on which the called terminal camps; and a third processing module 64, used to send a paging command to the second access network corresponding to the called terminal when no radio access bearer allocation has been completed with the calling terminal, wherein the second access network includes communication satellites.

[0183] In some embodiments of this application, after sending a paging command to the second access network corresponding to the called terminal, the third processing module 64 is further configured to: determine a preset duration; if no response information is received from the calling terminal within the preset duration, terminate the call establishment process of the called terminal, wherein the response information is used to indicate that the radio access bearer allocation of the calling terminal is completed.

[0184] In some embodiments of this application, the third processing module 64 terminates the call establishment process of the called terminal by: after a preset time, when the core network element receives a paging response message sent by the called terminal, the core network element discards the paging response message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0185] In some embodiments of this application, the third processing module 64 terminates the call establishment process of the called terminal by: after a preset time period, when the core network element has sent an authentication request message to the called terminal, the core network element discards the authentication response message sent by the called terminal in response to the authentication request message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0186] In some embodiments of this application, the third processing module 64 terminates the call establishment process of the called terminal by: after a preset time period, when the core network element has sent a security mode command message to the called terminal, the core network element discards the security mode command response message sent by the called terminal in response to the security mode command message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0187] In some embodiments of this application, the third processing module 64 terminates the call establishment process of the called terminal by: after a preset time period, when the core network element has sent a call establishment message to the called terminal, the core network element discards the call establishment response message sent by the called terminal in response to the call establishment message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0188] In some embodiments of this application, the third processing module 64 terminates the call establishment process of the called terminal by: after a preset time period, when the core network element completes the radio access bearer allocation process of the called terminal, the core network element discards the ringing message sent by the called terminal, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

[0189] It should be noted that each module in the above-mentioned satellite communication process establishment device can be a program module (for example, a set of program instructions to implement a certain function) or a hardware module. For the latter, it can be manifested in the following forms, but is not limited to them: each of the above modules is manifested as a processor, or the functions of each of the above modules are implemented by a processor.

[0190] This application provides a non-volatile storage medium storing a program. During program execution, the device containing the non-volatile storage medium performs the following satellite call setup method: a core network element obtains call setup information sent by the calling terminal through a first access network, wherein the first access network includes a communication satellite; the core network element determines the called terminal based on the call setup information and determines the beam on which the called terminal is camped; if the core network element has not completed radio access bearer allocation with the calling terminal, it sends a paging command to the second access network corresponding to the called terminal, wherein the second access network includes a communication satellite.

[0191] This application provides an electronic device, including a memory and a processor. The processor is used to run a program stored in the memory. When the program runs, it executes the following satellite call establishment method: a core network element obtains call establishment information sent by a calling terminal through a first access network, wherein the first access network includes a communication satellite; the core network element determines the called terminal based on the call establishment information and determines the beam on which the called terminal is camped; if the core network element has not completed the radio access bearer allocation with the calling terminal, it sends a paging command to the second access network corresponding to the called terminal, wherein the second access network includes a communication satellite.

[0192] This application provides a computer program product, including a computer program that, when executed by a processor, implements the following satellite call establishment method: a core network element obtains call establishment information sent by a calling terminal through a first access network, wherein the first access network includes a communication satellite; the core network element determines the called terminal based on the call establishment information and determines the beam on which the called terminal is camped; if the core network element has not completed the radio access bearer allocation with the calling terminal, it sends a paging command to the second access network corresponding to the called terminal, wherein the second access network includes a communication satellite.

[0193] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0194] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0195] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0196] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0197] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0198] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for establishing a satellite call process, characterized in that, include: The core network element obtains the call setup information sent by the calling terminal through the first access network, wherein the first access network includes communication satellites; The core network element determines the called terminal based on the call setup information and determines the beam on which the called terminal camps. If the core network element has not completed the wireless access bearer allocation with the calling terminal, it sends a paging command to the second access network corresponding to the called terminal. The second access network includes communication satellites. After the calling side sends the call setup information, the core network element sends a paging command to the second access network corresponding to the called terminal. After sending a paging command to the second access network corresponding to the called terminal, the method further includes: Determine the preset duration; If no response information is received from the calling terminal within the preset time period, the call establishment process of the called terminal is terminated, wherein the response information is used to indicate that the wireless access bearer allocation of the calling terminal is completed.

2. The satellite call process establishment method according to claim 1, characterized in that, The process for terminating the call setup of the called terminal includes: After the preset time period, when the core network element receives a paging response message sent by the called terminal, the core network element discards the paging response message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

3. The satellite call process establishment method according to claim 1, characterized in that, The process for terminating the call setup of the called terminal includes: After the preset time period, when the core network element has sent an authentication request message to the called terminal, the core network element discards the authentication response message sent by the called terminal in response to the authentication request message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

4. The satellite call process establishment method according to claim 1, characterized in that, The process for terminating the call setup of the called terminal includes: After the preset time period, when the core network element has sent a security mode command message to the called terminal, the core network element discards the security mode command response message sent by the called terminal in response to the security mode command message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

5. The satellite call process establishment method according to claim 1, characterized in that, The process for terminating the call setup of the called terminal includes: After the preset time period, when the core network element has sent a call setup message to the called terminal, the core network element discards the call setup response message sent by the called terminal in response to the call setup message, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call setup process.

6. The satellite call process establishment method according to claim 1, characterized in that, The process for terminating the call setup of the called terminal includes: After the preset time period, when the core network element completes the radio access bearer allocation process for the called terminal, the core network element discards the ringing message sent by the called terminal, releases the radio resource control connection resources corresponding to the called terminal through the second access network, and terminates the call establishment process.

7. A satellite call process establishment device, applicable to core network elements, characterized in that, include: The first processing module is used to obtain call setup information sent by the calling terminal through the first access network, wherein the first access network includes communication satellites; The second processing module is used to determine the called terminal based on the call setup information and to determine the beam on which the called terminal is camped. The third processing module is used to send a paging command to the second access network corresponding to the called terminal when the wireless access bearer allocation has not been completed with the calling terminal. The second access network includes communication satellites. After the calling side sends the call setup information, it sends a paging command to the second access network corresponding to the called terminal. The third processing module is further configured to determine a preset duration; if no response information is received from the calling terminal within the preset duration, the call establishment process of the called terminal is terminated, wherein the response information is used to indicate that the wireless access bearer allocation of the calling terminal is completed.

8. A non-volatile storage medium, characterized in that, The non-volatile storage medium stores a program, wherein when the program is executed, it controls the device containing the non-volatile storage medium to execute the satellite call process establishment method according to any one of claims 1 to 6.

9. An electronic device, characterized in that, include: A memory and a processor, the processor being configured to run a program stored in the memory, wherein the program, when running, executes the satellite call process establishment method according to any one of claims 1 to 6.

10. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the satellite call process establishment method according to any one of claims 1 to 6.

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