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CN-122028220-A - Method for establishing satellite-borne UPF tunnel and related device

CN122028220ACN 122028220 ACN122028220 ACN 122028220ACN-122028220-A

Abstract

The embodiment of the application provides a method for establishing a star-borne UPF tunnel and a related device, wherein the method is applied to a first SMF and comprises the steps of sending a management registration request containing a plurality of parameters to the BSF, wherein the management registration request is used for the BSF to establish session binding information among the parameters, the parameters comprise the identification of a first UE and the identification of the first SMF, sending a management inquiry request containing the identification of a second UE to the BSF, the BSF obtains the identification of the second SMF based on the identification of the second UE, receiving the identification of the second SMF sent by the BSF, sending first tunnel information corresponding to the first star-borne UPF to the second SMF based on the identification of the second SMF, obtaining second tunnel information corresponding to the second star-borne UPF sent by the second SMF, and sending a session modification instruction containing the second tunnel information to the first star-borne UPF, and the first star-borne UPF sends data corresponding to the second UE to the second star-borne UPF according to the session modification instruction. Thus, the establishment of the straight-through tunnel between the two satellite-borne UPFs is completed, and the straight-through of data between the satellite-borne UPFs is realized.

Inventors

  • LI ZHAO
  • WU HONGJIAN
  • QU QIN
  • ZHAO PENGTAO
  • ZHAI LIJUN
  • WANG CHUNTING

Assignees

  • 中国星网网络系统研究院有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (15)

  1. 1. A method for establishing a star-borne UPF tunnel, which is applied to a first SMF, the method comprising: Sending a management registration request containing a plurality of parameters to a BSF, wherein the management registration request is used for establishing session binding information among the plurality of parameters by the BSF, and the plurality of parameters comprise an identifier of a first UE and an identifier of the first SMF; The BSF is used for obtaining corresponding session binding information based on the identifier of the second UE and obtaining the identifier of a second SMF from the corresponding session binding information; Receiving an identifier of the second SMF sent by the BSF, sending first tunnel information corresponding to a first satellite-borne UPF to the second SMF based on the identifier of the second SMF, and obtaining second tunnel information corresponding to a second satellite-borne UPF sent by the second SMF; And transmitting a session modification instruction containing the second tunnel information to the first on-board UPF, wherein the second tunnel information is used for transmitting data corresponding to the second UE to the second on-board UPF by the first on-board UPF.
  2. 2. The method of claim 1, wherein the first UE, the first SMF, and the first on-board UPF correspond to a first side, and the second UE, the second SMF, and the second on-board UPF correspond to a second side; The first side is a calling side, the second side is a called side, or the second side is a calling side when the first side is a called side.
  3. 3. The method of claim 1, further comprising, prior to transmitting first tunnel information corresponding to a first on-board UPF to the second SMF based on an identification of the second SMF: based on the identification of the second SMF, it is determined that the second SMF is different from the first SMF.
  4. 4. The method of claim 1, further comprising, after sending a management registration request containing a plurality of parameters to the BSF: Receiving an association identifier sent by the BSF, wherein the association identifier is an identifier of session binding information corresponding to the management registration request; After sending the session modification instruction containing the second tunnel information to the first on-board UPF, the method further includes: And when the session is released, sending a management cancellation request carrying the association identifier to the BSF, wherein the management cancellation request is used for deleting the session binding information corresponding to the association identifier by the BSF.
  5. 5. The method of any of claims 1-4, wherein the identity of any SMF comprises an IP address of the SMF and the identity of any UE comprises an IP address of the UE.
  6. 6. The method of any one of claims 1-4, wherein the plurality of parameters include corresponding DNNs and auxiliary information of the first UE, the management query request further includes corresponding DNNs and auxiliary information of the second UE, and the auxiliary information includes SUPI and/or GPSI; the BSF obtains corresponding session binding information based on the identifier of the second UE, the corresponding DNN, and auxiliary information of the second UE.
  7. 7. The method for establishing the space-borne UPF tunnel is characterized by being applied to BSF, and comprises the following steps: Establishing session binding information among a plurality of parameters in response to a management registration request comprising the parameters, which is sent by a first SMF, wherein the parameters comprise the identification of a first UE and the identification of the first SMF; Responding to a management inquiry request which is sent by the first SMF and contains the identifier of the second UE, acquiring corresponding session binding information based on the identifier of the second UE, and acquiring the identifier of the second SMF from the corresponding session binding information; The method comprises the steps of sending an identifier of a second SMF to the first SMF, wherein the identifier of the second SMF is used for sending first tunnel information corresponding to a first satellite-borne UPF to the second SMF, obtaining second tunnel information corresponding to the second satellite-borne UPF sent by the second SMF, and sending a session modification instruction containing the second tunnel information to the first satellite-borne UPF, and the second tunnel information is used for sending data corresponding to the second UE to the second satellite-borne UPF by the first satellite-borne UPF.
  8. 8. The method of claim 7, wherein the first UE, the first SMF, and the first on-board UPF correspond to a first side, and the second UE, the second SMF, and the second on-board UPF correspond to a second side; The first side is a calling side, the second side is a called side, or the second side is a calling side when the first side is a called side.
  9. 9. The method of claim 7, further comprising, after establishing session binding information between the plurality of parameters: Sending an association identifier to the first SMF, wherein the association identifier is an identifier of session binding information corresponding to the management registration request; After sending the identification of the second SMF to the first SMF, further comprising: and deleting the session binding information corresponding to the association identifier in response to a management logout request carrying the association identifier, which is sent by the first SMF during session release.
  10. 10. The method of any of claims 7-9, wherein the identity of any SMF comprises an IP address of the SMF and the identity of any UE comprises an IP address of the UE.
  11. 11. The method according to any one of claims 7-9, wherein the plurality of parameters include a corresponding DNN and auxiliary information of the first UE, the management query request further includes a corresponding DNN and auxiliary information of the second UE, and the auxiliary information includes SUPI and/or GPSI; obtaining corresponding session binding information based on the identification of the second UE, including: And obtaining corresponding session binding information based on the identifier of the second UE, the corresponding DNN and the auxiliary information of the second UE.
  12. 12. A communication system comprising a first SMF, a first UE, a first on-board UPF, a second SMF, a second UE, a second on-board UPF, and a BSF, wherein: The first SMF is used for sending a management registration request containing a plurality of parameters to the BSF, wherein the parameters comprise the identification of the first UE and the identification of the first SMF; the BSF is used for responding to the management registration request to establish session binding information among the plurality of parameters; the first SMF is configured to send a management query request including an identity of a second UE to the BSF; The BSF is used for responding to the management inquiry request, obtaining corresponding session binding information based on the identifier of the second UE, obtaining the identifier of a second SMF from the corresponding session binding information, and sending the identifier of the second SMF to the first SMF; The first SMF is configured to send, to the second SMF, first tunnel information corresponding to a first on-board UPF based on an identifier of the second SMF, and obtain second tunnel information corresponding to a second on-board UPF sent by the second SMF; The first SMF is configured to send a session modification instruction including the second tunnel information to the first on-board UPF; and the first on-board UPF is used for sending the data corresponding to the second UE to the second on-board UPF based on the session modification instruction.
  13. 13. A first SMF comprising at least one processor and at least one memory, wherein said memory stores a computer program which, when executed by said processor, causes said processor to perform the method of any of claims 1 to 6.
  14. 14. A BSF comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the method of any of claims 7-11.
  15. 15. A computer readable storage medium, characterized in that it stores a computer program executable by a processor, which when run on the processor causes the processor to perform the method according to any one of claims 1-6 or 7-11.

Description

Method for establishing satellite-borne UPF tunnel and related device Technical Field The application relates to the technical field of communication, in particular to a satellite-borne UPF tunnel establishment method and a related device. Background The fifth generation mobile communication system (the 5th Generation Mobile Communication System,5GS) has the advantages of high bandwidth, high reliability, low delay, ubiquitous access and the like. With the development of satellite communication technology, the bandwidth capacity of a communication satellite is greatly improved, the cost is reduced, and the integration of a satellite network and a 5G network is raised. The strong coverage capability through satellite networks may assist 5G networks in covering areas that are difficult to reach for terrestrial networks. For renewable satellites, a User Equipment (UE) may access the 5G core network (5G Core network,5GC) through an on-board base station, or in combination with on-board User plane functions (Policy Control Function, UPF). When voice communication is carried out under a satellite access scene, the media surface of the voice communication can be activated on the satellite-borne UPF through the coordination and coordination of the ground IP multimedia subsystem (IP Multimedia Subsystem, IMS) and 5GC, so that the UE directly communicates through the satellite-borne UPF, and the voice communication time delay is reduced. When the session channels of the calling and called users are established under the control of different session management functions (Session Management Function, SMF), how to establish a through tunnel between the satellite-borne UPFs is a problem to be solved. Disclosure of Invention The embodiment of the application provides a method and a related device for establishing a satellite-borne UPF tunnel, which are used for realizing the establishment of a straight-through tunnel between satellite-borne UPFs. In a first aspect, an embodiment of the present application provides a method for establishing a star-borne UPF tunnel, which is applied to a first SMF, where the method includes: Sending a management registration request containing a plurality of parameters to a binding support function (Binding Support Function, BSF), wherein the management registration request is used for the BSF to establish session binding information among the plurality of parameters, and the plurality of parameters comprise an identifier of a first UE and an identifier of the first SMF; The BSF is used for obtaining corresponding session binding information based on the identifier of the second UE and obtaining the identifier of a second SMF from the corresponding session binding information; Receiving an identifier of the second SMF sent by the BSF, sending first tunnel information corresponding to a first satellite-borne UPF to the second SMF based on the identifier of the second SMF, and obtaining second tunnel information corresponding to a second satellite-borne UPF sent by the second SMF; And transmitting a session modification instruction containing the second tunnel information to the first on-board UPF, wherein the second tunnel information is used for transmitting data corresponding to the second UE to the second on-board UPF by the first on-board UPF. In some alternative embodiments, the first UE, the first SMF, and the first on-board UPF correspond to a first side, and the second UE, the second SMF, and the second on-board UPF correspond to a second side; The first side is a calling side, the second side is a called side, or the second side is a calling side when the first side is a called side. In some optional embodiments, before sending, to the second SMF, first tunnel information corresponding to the first on-board UPF based on the identification of the second SMF, the method further includes: based on the identification of the second SMF, it is determined that the second SMF is different from the first SMF. In some alternative embodiments, after sending a management registration request including a plurality of parameters to the BSF, the method further includes: Receiving an association identifier sent by the BSF, wherein the association identifier is an identifier of session binding information corresponding to the management registration request; After sending the session modification instruction containing the second tunnel information to the first on-board UPF, the method further includes: And when the session is released, sending a management cancellation request carrying the association identifier to the BSF, wherein the management cancellation request is used for deleting the session binding information corresponding to the association identifier by the BSF. In some alternative embodiments, the identification of any SMF includes an IP address of the SMF, and the identification of any UE includes an IP address of the UE. In some optional embodiments, the plurality of parameters inclu