WO2023019503A1 - 端到端进行通信的方法、地面信关站、星载upf和系统 - Google Patents

端到端进行通信的方法、地面信关站、星载upf和系统 Download PDF

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Publication number
WO2023019503A1
WO2023019503A1 PCT/CN2021/113464 CN2021113464W WO2023019503A1 WO 2023019503 A1 WO2023019503 A1 WO 2023019503A1 CN 2021113464 W CN2021113464 W CN 2021113464W WO 2023019503 A1 WO2023019503 A1 WO 2023019503A1
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WIPO (PCT)
Prior art keywords
upf
board
node information
satellite
message
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PCT/CN2021/113464
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English (en)
French (fr)
Inventor
王振
颜小飞
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Hytera Communications Corp Ltd
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Hytera Communications Corp Ltd
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Priority to PCT/CN2021/113464 priority Critical patent/WO2023019503A1/zh
Publication of WO2023019503A1 publication Critical patent/WO2023019503A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems

Definitions

  • the invention relates to the field of satellite communication, in particular to a method for end-to-end communication, a ground gateway station, a spaceborne UPF and a system.
  • the access network AN is on the satellite
  • the core network control plane is deployed on the ground gateway station
  • the core network UPF is deployed on the satellite (hereinafter referred to as the satellite-borne UPF) and the ground signal gateway.
  • Off station hereinafter referred to as ground UPF).
  • the user data message is forwarded to the ground gateway station through the satellite AN, the inter-satellite link, and the feeder link, and then sent through the ground gateway station, the feeder link, the inter-satellite link, and the satellite AN to the peer satellite terminal.
  • the satellite terminals exchange data through the ground gateway station, there will be a risk of being monitored, and there is a great hidden danger of communication security.
  • the embodiment of the present invention discloses a method, device and system for end-to-end communication, which achieves the purpose of directly performing data transmission through satellites and greatly improves the security of communication.
  • the embodiment of the present invention discloses a method for end-to-end communication, and the method is applied to a ground gateway station, including:
  • the ground gateway station After the ground gateway station receives the call message sent by the first satellite terminal, it parses the call message to obtain the node information of the first satellite-borne UPF; the first satellite-borne UPF is the The UPF of the satellite accessed by the terminal; the call message includes information related to requesting to establish a session with the second satellite terminal;
  • the second satellite terminal After receiving the response message fed back by the second satellite terminal, analyze the response message to obtain the node information of the second on-board UPF; the second on-board UPF connects to the second satellite terminal The UPF of the incoming satellite;
  • the node information and the node information of the second on-board UPF are the basis for the direct communication between the first satellite terminal and the second satellite terminal through the inter-satellite link.
  • the sending the node information of the first on-board UPF to the second on-board UPF includes:
  • the sending the node information of the second on-board UPF to the first on-board UPF includes:
  • the node information of the first onboard UPF is label information and/or interface address information of the first onboard UPF
  • the node information of the second onboard UPF is label information and/or interface address information of the second onboard UPF.
  • the embodiment of the present invention discloses a method for end-to-end communication, and the method is applied to a spaceborne UPF, including:
  • the first on-board UPF When the first on-board UPF receives the call message sent by the first satellite terminal, it writes the node information of the first on-board UPF into the call message, and will carry the first on-board UPF The call message of UPF node information is sent to the ground gateway station;
  • the second on-board UPF When the second on-board UPF receives the response message sent by the second satellite terminal, it writes the node information of the second on-board UPF into the response message, and will carry the second on-board UPF The node information of UPF is sent to the ground gateway station;
  • the first spaceborne UPF receives and saves the node information of the second spaceborne UPF sent by the ground gateway station, and the second spaceborne UPF receives the node information of the first spaceborne UPF sent by the ground gateway station information and save;
  • the first on-board UPF or the second on-board UPF When the first on-board UPF or the second on-board UPF receives the service message, it writes the saved node information of the opposite end of the on-board UPF into the service message, and transmits the information through the inter-satellite link and The node information of the on-board UPF at the opposite end sends the service message to the on-board UPF at the opposite end.
  • any one of the on-board UPFs except the first on-board UPF and the second on-board UPF after receiving the service message, parses the service message to obtain the node information of the peer on-board UPF ;
  • the current on-board UPF is not the on-board UPF of the peer, determine the next-hop on-board UPF according to the node information of the on-board UPF of the peer;
  • sending the service message to the on-board UPF of the opposite end through the inter-satellite link includes:
  • the service message is a voice service
  • write the saved node information of the on-board UPF of the opposite end in the service message and pass the inter-satellite link and the node information of the on-board UPF of the opposite end Send the service message to the on-board UPF at the opposite end.
  • the embodiment of the present invention discloses a ground gateway station, including:
  • the first parsing unit is configured to analyze the call message after the ground gateway station receives the call message sent by the first satellite terminal, and obtain the node information of the first satellite-borne UPF; the first satellite-borne UPF The UPF is the UPF of the satellite accessed by the first satellite terminal; the call message includes relevant information requesting to establish a session with the second satellite terminal;
  • a first sending unit configured to send the call message to the second satellite terminal
  • the second analysis unit is configured to analyze the response message after receiving the response message fed back by the second satellite terminal to obtain the node information of the second on-board UPF;
  • the second on-board UPF is the UPF of the satellite accessed by the second satellite terminal;
  • the second sending unit is configured to send the node information of the first on-board UPF to the second on-board UPF, and send the node information of the second on-board UPF to the first on-board UPF;
  • the node information of the first on-board UPF and the node information of the second on-board UPF are basis for direct communication between the first satellite terminal and the second satellite terminal through an inter-satellite link.
  • the embodiment of the present invention discloses a spaceborne UPF, including:
  • the first sending unit is configured to write the node information of the first on-board UPF into the call message after the first on-board UPF receives the call message sent by the first satellite terminal, and carry The call message with the node information of the first on-board UPF is sent to the ground gateway station;
  • the second sending unit is configured to write the node information of the second on-board UPF into the response message when the second on-board UPF receives the response message sent by the second satellite terminal, and carry Sending the node information of the second on-board UPF to the ground gateway station;
  • the saving unit is used for the first spaceborne UPF to receive and store the node information of the second spaceborne UPF sent by the ground gateway station, and the second spaceborne UPF receives the first node information sent by the ground gateway station. Onboard UPF node information and save;
  • the communication unit is configured to write the saved node information of the opposite end of the on-board UPF into the service message after the first on-board UPF or the second on-board UPF receives the service message, and pass The inter-satellite link and the node information of the on-board UPF at the opposite end send the service message to the on-board UPF at the opposite end.
  • the embodiment of the present invention discloses a system for end-to-end communication, and the system includes:
  • Ground gateway station spaceborne UPF and satellite terminal
  • the first satellite terminal is used to send a call message corresponding to the call request
  • the second satellite terminal is used to feed back a response message to the call message
  • the ground gateway station is used to execute the above-mentioned end-to-end communication method applied to the ground gateway station;
  • the on-board UPF is used to execute the above-mentioned end-to-end communication method applied to the on-board UPF.
  • the embodiment of the present invention discloses a method, device and system for end-to-end communication, including:
  • the ground gateway After receiving the session request message containing the node information of the space-borne UPF, the ground gateway obtains the node information of the first space-borne UPF by analyzing the call message, and receives the feedback response message sent by the second satellite terminal.
  • the node information of the second on-board UPF is obtained, and the node information of the first on-board UPF is sent to the second on-board UPF, and the node information of the second on-board UPF is sent to the second on-board UPF.
  • One on-board UPF then when the first on-board UPF or the second on-board UPF receives the service message, write the node information of the peer on-board UPF in the service message, and based on the node information of the peer on-board UPF information, and send the service message to the peer UPF through the inter-satellite link.
  • the satellite terminal directly communicates between the satellite and the satellite without forwarding through the ground gateway station, thereby greatly improving the security performance of the communication.
  • Fig. 1 shows a schematic diagram of a satellite communication network in the prior art
  • FIG. 2 shows a schematic diagram of an interaction process of a method for end-to-end communication provided by an embodiment of the present invention
  • FIG. 3 shows a schematic diagram of Embodiment 1 of a method for performing peer-to-peer communication provided by an embodiment of the present invention
  • FIG. 4 shows a schematic diagram of Embodiment 2 of a method for end-to-end communication provided by an embodiment of the present invention
  • FIG. 5 shows a schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention
  • FIG. 6 shows another schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention
  • FIG. 7 shows a schematic structural diagram of a system for end-to-end communication provided by an embodiment of the present invention.
  • Fig. 8 shows a schematic structural diagram of a ground gateway station provided by an embodiment of the present invention.
  • Fig. 9 shows a schematic structural diagram of an on-board UPF provided by an embodiment of the present invention.
  • FIG. 2 it shows a schematic diagram of an interaction process of a method for end-to-end communication provided by an embodiment of the present invention.
  • the method includes:
  • first satellite terminal and the second satellite terminal to access the ground gateway may be multiple methods for the first satellite terminal and the second satellite terminal to access the ground gateway, which are not limited in this embodiment.
  • the method for the first satellite terminal to access the ground gateway station includes:
  • the first satellite terminal accesses the first on-board AN, and the first on-board UPF corresponding to the first on-board AN sends the access message to the ground gateway.
  • the ground gateway station includes the core network control plane and the ground UPF (or understand the core network user plane), the core network control plane receives the access request, and sends the access request to the ground UPF, and the ground UPF creates the user plane context , which means that the first satellite terminal has successfully connected to the ground gateway station.
  • the method for the first satellite terminal to access the ground gateway station includes:
  • the first satellite terminal accesses the first on-board AN, and the first on-board UPF corresponding to the first on-board AN forwards the access message to the target on-board UPF that has a feeder circuit with the ground gateway station.
  • the UPF sends the access message to the ground gateway station through the feeder circuit.
  • the ground gateway station includes the core network control plane and the ground UPF (or understand the core network user plane), the core network control plane receives the access request, and sends the access request to the ground UPF, and the ground UPF creates the user plane context , which means that the first satellite terminal has successfully connected to the ground gateway station.
  • the user data message is transmitted to the data network or IMS network via the first on-board AN, the first on-board UPF, and the ground UPF.
  • the method for the second satellite terminal to access the ground gateway station includes:
  • the second satellite terminal accesses the second satellite AN, and the second on-board UPF corresponding to the second satellite AN sends the access message to the ground gateway station.
  • the ground gateway station includes the core network control plane and the ground UPF (or understand the core network user plane), the core network control plane receives the access request, and sends the access request to the ground UPF, and the ground UPF creates the user plane context , which means that the second satellite terminal has successfully connected to the ground gateway station.
  • the user data message is transmitted via the second on-board AN, the second on-board UPF, and the ground UPF to the data network or the IMS network.
  • the first satellite terminal When the first satellite terminal initiates a call request, it sends a call message to the first on-board UPF; the call message includes information related to a session request with the second satellite terminal, and the first on-board UPF is the first on-board UPF.
  • the satellite accessed by the first satellite terminal;
  • the call message after the first satellite terminal initiates a call request, the call message first reaches the first on-board UPF, for example, the call message may be an INVITE message.
  • the first on-board UPF writes the node information of the first on-board UPF in the call message, and sends the call message carrying the node information of the first on-board UPF to the ground gateway station;
  • the first on-board UPF after the first on-board UPF receives the call message, it writes the node information of the first on-board UPF in the call message.
  • the first on-board UPF can be added to the extension header of the call message. Load the node information of UPF.
  • the node information of the first on-board UPF can be the label information of the first on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board, the node information of the first on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the first on-board UPF is the label information of the first on-board UPF.
  • the ground gateway station After receiving the call message sent by the first on-board UPF, the ground gateway station parses the call message to obtain node information of the first on-board UPF in the call message;
  • the ground gateway station includes a core network control plane, UPF, and service network (the service network includes a data network or an IMS network) and the like.
  • the core network control plane of the ground gateway station When the core network control plane of the ground gateway station receives the call message, it sends it to the ground UPF, and the ground UPF sends the call message to the data network or IMS network.
  • the message is sent to the IMS network, wherein, if the first satellite terminal and the second satellite terminal do not belong to the same IMS network, the ground UPF sends the call message to the IMS network to which the first satellite terminal belongs, and then through the first satellite terminal.
  • the IMS network to which the second satellite terminal belongs sends the call message to the IMS network to which the second satellite terminal belongs.
  • the IMS network to which the second satellite terminal belongs analyzes the service message to obtain node information of the first on-board UPF.
  • S205 The ground gateway station sends the call message to the second satellite terminal
  • the second satellite terminal sends a response message to the second on-board UPF;
  • the second on-board UPF is a satellite accessed by the second satellite terminal;
  • the second on-board UPF writes the node information of the second on-board UPF in the response message, and sends the response message carrying the node information of the second on-board UPF to the ground gateway station;
  • the second on-board UPF after the second on-board UPF receives the call message, it writes the node information of the second on-board UPF in the call message.
  • the second on-board UPF can be added to the extension header of the call message. Load the node information of UPF.
  • the node information of the second on-board UPF can be the label information of the second on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board UPF, the node information of the second on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the second on-board UPF is the label information of the first on-board UPF.
  • the ground gateway station After receiving the response message, the ground gateway station parses out the node information of the second on-board UPF from the response message;
  • the ground gateway station creates a dedicated service flow for the first satellite terminal and the second satellite terminal respectively, and during the process of creating a dedicated service flow for the second satellite terminal, the ground gateway station uses the first satellite terminal
  • the node information is sent to the second on-board UPF, and the node information on the second on-board UPF is sent to the first on-board UPF during the process of creating a dedicated service flow for the first satellite terminal;
  • the node information of the first on-board UPF is written in the signaling of the communication between the ground gateway station and the second on-board UPF, preferably, it can be on the ground
  • the node information of the first on-board UPF is written in the extended information element of the signaling between the gateway station and the second on-board UPF.
  • the node information of the second on-board UPF is written in the signaling of the communication between the ground gateway station and the first on-board UPF, preferably, it can be on the ground
  • the node information of the second on-board UPF is written in the extended information element of the signaling between the gateway station and the first on-board UPF.
  • the first on-board UPF receives and saves the node information of the second on-board UPF sent by the ground gateway station, and the second on-board UPF receives and saves the node information of the first on-board UPF sent by the ground gateway station;
  • the next-hop on-board UPF can be determined through the node information of the peer on-board UPF, and the The service message is sent to the onboard UPF of the next hop until it is sent to the peer onboard UPF whose node information matches.
  • the opposite end represents the other end of the communication, wherein a session connection interface is established between the first satellite terminal and the second satellite terminal, the second satellite terminal is the opposite end of the first satellite terminal, and the first satellite terminal is the connection of the second satellite terminal.
  • the first on-board UPF is the opposite end of the second on-board UPF
  • the second on-board UPF is the opposite end of the first on-board UPF.
  • the ground gateway station after the ground gateway station receives the session request message containing the node information of the on-board UPF, it obtains the node information of the first on-board UPF by analyzing the call message, and receives the message sent by the second satellite terminal.
  • the node information of the second on-board UPF is obtained by parsing the response message, and the node information of the first on-board UPF is sent to the second on-board UPF, and the node information of the second on-board UPF is sent to the second on-board UPF.
  • the node information is sent to the first on-board UPF, then when the first on-board UPF or the second on-board UPF receives the service message, it writes the node information of the peer’s on-board UPF in the service message, and based on the peer’s
  • the node information of the on-board UPF sends the service message to the peer on-board UPF through the inter-satellite link.
  • the satellite terminal directly communicates between the satellite and the satellite without forwarding through the ground gateway station, thereby greatly improving the security performance of the communication.
  • FIG. 3 it shows a schematic flowchart of a method for end-to-end communication provided by Embodiment 2 of the present invention.
  • the method is applied to a ground gateway station, including:
  • the ground gateway station After receiving the call message sent by the first satellite terminal, the ground gateway station parses the call message to obtain the node information of the first on-board UPF; the first on-board UPF is the first satellite UPF The UPF of the satellite accessed by the terminal; the call message includes information related to requesting to establish a session with the second satellite terminal;
  • the first satellite terminal after the first satellite terminal initiates a call request, the first satellite terminal sends a call message to the ground gateway station, wherein the request message includes information related to the session establishment request of the second satellite terminal.
  • the call message reaches the first on-board UPF, the first on-board UPF will write the node information of the first on-board UPF in the call message.
  • the node information of the first on-board UPF can be the label information of the first on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board, the node information of the first on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the first on-board UPF is the label information of the first on-board UPF.
  • the ground gateway station includes: core network control plane, UPF and data network or IMS network, etc.
  • the core network control plane of the ground gateway station When the core network control plane of the ground gateway station receives the call message, it sends it to the ground UPF, and the ground UPF sends the call message to the data network or IMS network.
  • the message is sent to the IMS network, wherein, if the first satellite terminal and the second satellite terminal do not belong to the same IMS network, the ground UPF sends the call message to the IMS network to which the first satellite terminal belongs, and then through the first satellite terminal.
  • the IMS network to which the second satellite terminal belongs sends the call message to the IMS network to which the second satellite terminal belongs.
  • the IMS network to which the second satellite terminal belongs analyzes the service message to obtain node information of the first on-board UPF.
  • S302 Send the call message to the second satellite terminal
  • the second satellite terminal After the second satellite terminal receives the calling message, it needs to feed back a response message to the ground gateway station.
  • the response message sent by the second satellite terminal reaches the second on-board UPF, the second on-board UPF will The node information of the second spaceborne UPF is written in the text, and the node information carrying the second spaceborne UPF is sent to the ground gateway station.
  • the node information of the second on-board UPF can be the label information of the second on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board UPF, the node information of the second on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the second on-board UPF is the label information of the first on-board UPF.
  • S304 Send the node information of the first on-board UPF to the second on-board UPF, and send the node information of the second on-board UPF to the first on-board UPF; the node information of the first on-board UPF and the second on-board UPF
  • the node information of the two satellite-borne UPFs is the basis for direct communication between the first satellite terminal and the second satellite terminal through the inter-satellite link.
  • multiple ways can be used to realize the purpose of sending the node information of the first on-board UPF to the second on-board UPF, and sending the node information of the second on-board UPF to the first on-board UPF.
  • the methods used are not limited in the examples.
  • the node information of the second on-board UPF is sent to the first on-board UPF, specifically, including:
  • the IMS to which the first satellite terminal belongs triggers the core network control plane to create a dedicated service flow for the first satellite terminal.
  • the node information of the first on-board UPF is sent to the second on-board UPF, specifically, including:
  • the IMS to which the second satellite terminal belongs triggers the core network control plane to create a dedicated service flow for the second satellite terminal.
  • the ground gateway station after the ground gateway station receives the session request message containing the node information of the on-board UPF, it obtains the node information of the first on-board UPF by parsing the call message, and receives the message sent by the second satellite terminal.
  • the node information of the second on-board UPF is obtained by parsing the response message, and the node information of the first on-board UPF is sent to the second on-board UPF, and the node information of the second on-board UPF is sent to the second on-board UPF.
  • the node information is sent to the first on-board UPF, then when the first on-board UPF or the second on-board UPF receives the service message, it writes the node information of the peer’s on-board UPF in the service message, and based on the peer’s
  • the node information of the spaceborne UPF sends the service message to the peer spaceborne UPF through the inter-satellite link.
  • FIG. 4 shows a schematic flowchart of Embodiment 2 of a method for end-to-end communication provided by Embodiment 3 of the present invention.
  • the method includes:
  • the first satellite terminal sends a call request and sends a call message.
  • the call message reaches the first on-board UPF, in order to let the ground gateway station know the node information of the first on-board UPF, and send the call message
  • the node information is sent to the second on-board UPF, and the first on-board UPF writes the node information of the first on-board UPF in the call message.
  • the first on-board UPF can be written in the extension header of the call message. UPF node information.
  • the node information of the first on-board UPF can be the label information of the first on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board, the node information of the first on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the first on-board UPF is the label information of the first on-board UPF.
  • the ground gateway station sends the call to the second satellite terminal, and the second satellite terminal feeds back a response message.
  • the response message reaches the second on-board UPF
  • the second on-board UPF writes the node information of the second on-board UPF into
  • the node information carrying the second on-board UPF is sent to the ground gateway station.
  • the node information of the second on-board UPF can be the label information of the second on-board UPF or the address information of the interface, preferably, if the N6 interface is used on the on-board UPF, the node information of the second on-board UPF can be the address of the interface Information, if the on-board N9 interface is used, in order to reduce the calculation amount of each on-board UPF, the node information of the second on-board UPF is the label information of the first on-board UPF.
  • the first spaceborne UPF receives and saves the node information of the second spaceborne UPF sent by the ground gateway station, and the second spaceborne UPF receives and saves the node information of the first spaceborne UPF sent by the ground gateway station. save;
  • the ground gateway station sends the node information of the first on-board UPF to the second on-board UPF, sends the node information of the second on-board UPF to the first on-board UPF, and sends the node information of the first on-board UPF to the first on-board UPF.
  • the node information is sent to the second on-board UPF.
  • the first spaceborne UPF After the first spaceborne UPF receives the node information of the second spaceborne UPF sent by the ground gateway station, it saves the node information of the second spaceborne UPF; After the node information of the first on-board UPF is stored, the node information of the first on-board UPF is saved.
  • the first on-board UPF is the opposite end of the second on-board UPF
  • the second on-board UPF is the peer of the first on-board UPF. Peer.
  • the transmission route between satellites can be determined through the node information of the on-board UPF at the opposite end written in the message, so as to transmit the message through the inter-satellite link.
  • the process of transmitting service messages between satellites includes:
  • the voice service can be directly transmitted through the satellite, thus, It also includes: detecting the type of the received service message;
  • the service message is a voice message
  • write the node information of the on-board UPF of the opposite end in the service message and pass the node information of the star-borne UPF of the opposite end through the inter-satellite link
  • the file is sent to the on-board UPF of the opposite end.
  • the on-board UPF converts the ground gateway station and forwards it to the destination end through the ground gateway station.
  • the first on-board UPF after the first on-board UPF receives the call message sent by the first satellite terminal, it writes the node information of the on-board UPF into the call message, and sends the call message to the ground gateway station , the ground signal parses the call message to obtain the node information of the first on-board UPF.
  • the second spaceborne UPF After the second spaceborne UPF receives the response message fed back by the second satellite terminal, it writes the node information of the spaceborne UPF into the response message, and sends the call message to the ground gateway station.
  • the node information of the second on-board UPF is obtained, and the node information of the first on-board UPF is sent to the second on-board UPF, and the node information of the second on-board UPF is sent to the first on-board UPF, then
  • the first on-board UPF or the second on-board UPF receives the service message, it writes the node information of the peer on-board UPF in the service message, and based on the node information of the peer on-board UPF, through the inter-satellite link
  • the path sends the service packet to the peer UPF onboard.
  • the satellite terminal directly communicates between the satellite and the satellite without forwarding through the ground gateway station, thereby greatly improving the security performance of the communication.
  • FIG. 5 shows a schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention.
  • the device is applied to a ground gateway station, including:
  • the first parsing unit 501 is configured to analyze the call message after the ground gateway station receives the call message sent by the first satellite terminal, and obtain the node information of the first satellite-borne UPF; the first satellite terminal Carrying UPF as the UPF of the satellite accessed by the first satellite terminal; the call message includes information related to requesting to establish a session with the second satellite terminal;
  • the first sending unit 502 is configured to send the call message to the second satellite terminal;
  • the second parsing unit 503 is configured to parse the response message after receiving the response message fed back by the second satellite terminal to obtain node information of the second on-board UPF; the second on-board UPF is the second on-board UPF The UPF of the satellite accessed by the second satellite terminal;
  • the second sending unit 504 is configured to send the node information of the first on-board UPF to the second on-board UPF, and send the node information of the second on-board UPF to the first on-board UPF; the first on-board UPF
  • the node information of the UPF and the node information of the second on-board UPF are the basis for direct communication between the first satellite terminal and the second satellite terminal through the inter-satellite link.
  • the second sending unit includes:
  • the first writing subunit is configured to write the node information of the first on-board UPF in the first signaling when creating a dedicated service flow for the second satellite terminal;
  • the first sending subunit is configured to send the first signaling carrying the node information of the first on-board UPF to the second on-board UPF.
  • the second sending unit includes:
  • the second writing subunit is configured to write the node information of the second on-board UPF in the first signaling when creating a dedicated service flow for the second satellite terminal;
  • the second sending subunit is configured to send the second signaling carrying the node information of the second on-board UPF to the first on-board UPF.
  • the node information of the first onboard UPF is label information and/or interface address information of the first onboard UPF
  • the node information of the second onboard UPF is label information and/or interface address information of the second onboard UPF.
  • the ground gateway station when the first satellite terminal and the second satellite terminal are establishing a session connection, the ground gateway station interacts with the first on-board UPF and the second on-board UPF respectively to connect the first on-board UPF to the second on-board UPF.
  • the node information of the UPF is sent to the second on-board UPF, and the node information of the second on-board UPF is sent to the first on-board UPF, thereby realizing the purpose of direct communication between the on-board and on-board UPF.
  • FIG. 6 it shows another schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention.
  • the device is applied to a spaceborne UPF, and the device includes:
  • the first sending unit 601 is configured to write the node information of the first on-board UPF into the call message after the first on-board UPF receives the call message sent by the first satellite terminal, and sending the call message carrying the node information of the first on-board UPF to the ground gateway station;
  • the second sending unit 602 is configured to write the node information of the second on-board UPF into the response message when the second on-board UPF receives the response message sent by the second satellite terminal, and The node information carrying the second on-board UPF is sent to the ground gateway station;
  • the saving unit 603 is used for the first on-board UPF to receive and store the node information of the second on-board UPF sent by the ground gateway station, and the second on-board UPF to receive the first on-board UPF sent by the ground gateway station and save the node information;
  • the first communication unit 604 is configured to write the saved node information of the opposite end of the on-board UPF into the service message after the first on-board UPF or the second on-board UPF receives the service message, and transmit Send the service message to the peer UPF based on the node information of the interlink and the starborne UPF of the opposite end.
  • the first communication unit includes:
  • the first analysis subunit is used for any one of the on-board UPFs except the first on-board UPF and the second on-board UPF to parse the service message after receiving the service message to obtain the The node information of the on-board UPF at the opposite end;
  • the determination subunit is used to determine the next-hop on-board UPF according to the node information of the on-board UPF on the opposite end if the current on-board UPF is not the on-board UPF on the opposite end;
  • the sending subunit is configured to send the service message to the next-hop on-board UPF through the inter-satellite link.
  • a detection unit configured to detect the service type of the service message after the first on-board UPF or the second on-board UPF receives the service message
  • the second communication unit is configured to write the stored peer UPF node information into the service message if the service message is a voice service, and communicate with the peer through the inter-satellite link
  • the node information of the on-board UPF at the end sends the service message to the on-board UPF at the opposite end.
  • a method of direct communication between satellites and satellites is realized without forwarding through ground gateway stations, thereby greatly improving the security performance of communications.
  • Fig. 7 shows a schematic structural diagram of a system for end-to-end communication provided by an embodiment of the present invention.
  • the system includes:
  • Ground gateway station 700 spaceborne UPF701 and satellite terminal 702, the satellite terminal includes: a first satellite terminal 7021 and a second satellite terminal 7022;
  • the first satellite terminal 7021 is used to send a call message corresponding to the call request
  • the second satellite terminal 7022 is configured to feed back a response message to the call message
  • the ground gateway station 700 is used to implement the end-to-end communication method described in Embodiment 2 above;
  • the on-board UPF701 is used to execute the end-to-end communication method described in Embodiment 3 above;
  • the ground gateway station includes: a core network control plane, a ground UPF and a service network.
  • FIG. 8 shows a schematic structural diagram of a ground gateway station provided by an embodiment of the present invention.
  • the ground gateway station includes:
  • the core network control plane After the core network control plane receives the call message sent by the first satellite terminal, it sends it to the UPF on the ground; the call message includes relevant information requesting to establish a session with the second satellite terminal;
  • the ground UPF forwards the received call message to the service network to which the second satellite terminal belongs and the second on-board UPF;
  • the service network to which the second satellite terminal belongs analyzes the service message to obtain the node information of the first on-board UPF;
  • the core network control plane After the core network control plane receives the response message sent by the second satellite terminal, it sends it to the UPF on the ground; the second on-board UPF is the UPF of the satellite accessed by the second satellite terminal;
  • the ground UPF sends the response message to the service network to which the first on-board UPF belongs;
  • the service network to which the first onboard UPF belongs parses the response message to obtain the node information of the second onboard UPF;
  • the core network control plane sends the node information of the first on-board UPF to the second on-board UPF, and sends the node information of the second on-board UPF to the first on-board UPF;
  • the node information of the first on-board UPF and the node information of the second on-board UPF are the basis for the direct communication between the first satellite terminal and the second satellite terminal through the inter-satellite link.
  • the core network control plane is also used for:
  • the core network control plane is also used for:
  • the node information of the first onboard UPF is label information and/or interface address information of the first onboard UPF
  • the node information of the second onboard UPF is label information and/or interface address information of the second onboard UPF.
  • a method of direct communication between satellites and satellites is realized without forwarding through ground gateway stations, thereby greatly improving the security performance of communications.
  • FIG. 9 shows a schematic structural diagram of an on-board UPF provided by an embodiment of the present invention.
  • the on-board UPF includes:
  • the first communication device 901 is configured to write the node information of the first on-board UPF into the call message after the first on-board UPF receives the call message sent by the first satellite terminal, and sending the call message carrying the node information of the first on-board UPF to the ground gateway station;
  • the second communication device 902 is configured to write the node information of the second on-board UPF into the response message when the second on-board UPF receives the response message sent by the second satellite terminal, and sending the node information carrying the second on-board UPF to a ground gateway station;
  • the storage device 903 is used for the first spaceborne UPF to receive and save the node information of the second spaceborne UPF sent by the ground gateway station, and the second spaceborne UPF to receive the first node information sent by the ground gateway station.
  • the third communication device 904 is configured to, after the first on-board UPF or the second on-board UPF receives the service message, write the saved node information of the peer on-board UPF in the service message , and send the service message to the peer UPF through the inter-satellite link and the node information of the peer UPF.
  • the onboard UPF is also used for:
  • any one of the on-board UPFs except the first on-board UPF and the second on-board UPF after receiving the service message, parses the service message to obtain the node information of the peer on-board UPF ;
  • the current on-board UPF is not the on-board UPF of the peer, determine the next-hop on-board UPF according to the node information of the on-board UPF of the peer;
  • the onboard UPF is also used for:
  • the first on-board UPF or the second on-board UPF After the first on-board UPF or the second on-board UPF receives the service message, detect the service type of the service message;
  • the service message is a voice service
  • write the saved node information of the on-board UPF of the opposite end in the service message and pass the inter-satellite link and the node information of the on-board UPF of the opposite end Send the service message to the on-board UPF at the opposite end.

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Abstract

一种端到端进行通信的方法、装置及系统包括：地面信关站在接收到包含第一星载UPF的节点信息的呼叫报文后，通过解析该呼叫报文得到第一星载UPF的节点信息，在接收到第二卫星终端反馈的响应报文时，通过解析该响应报文，得到第二星载UPF的节点信息，并将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF；当第一星载UPF或者第二星载UPF接收到业务报文后，在业务报文中写入对端的星载UPF的节点信息，并基于对端的星载UPF的节点信息，通过星间链路将业务报文发送到对端星载UPF。由此，实现了卫星终端通过星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。

Description

端到端进行通信的方法、地面信关站、星载UPF和系统 技术领域
本发明涉及卫星通信领域，尤其涉及端到端进行通信的方法、地面信关站、星载UPF和系统。
背景技术
如图1所示，在卫星网络中，接入网AN在卫星之上，而核心网控制面部署在地面信关站，核心网UPF同时部署在卫星上(以下简称星载UPF)以及地面信关站(以下简称地面UPF)。
卫星终端进行通信时，用户数据报文通过卫星AN、星间链路、馈电链路转发至地面信关站，再经过地面信关站、馈电链路、星间链路、卫星AN发送至对端卫星终端。但是，卫星终端之间经过地面信关站进行数据交互时，会存在被监听的风险，存在很大的通信安全的隐患。
发明内容
有鉴于此，本发明实施例公开了一种端到端进行通信的方法、装置及系统，实现了直接通过卫星进行数据传输的目的，大大提升了通信的安全性。
本发明实施例公开了一种端到端进行通信的方法，所述方法应用于地面信关站，包括：
当地面信关站接收到第一卫星终端发送的呼叫报文后，解析所述呼叫报文，得到所述第一星载UPF的节点信息；所述第一星载UPF为所述第一卫星终端接入的卫星的UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
将所述呼叫报文发送给所述第二卫星终端；
当接收到所述第二卫星终端反馈的响应报文后，解析所述响应报文，得到所述第二星载UPF的节点信息；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
将所述第一星载UPF的节点信息发送给所述第二星载UPF，将所述第二星载UPF的节点信息发送给所述第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为所述第一卫星终端和所述第二卫星终端通过星间链路直接进行通信的依据。
可选的，所述将所述第一星载UPF的节点信息发送给所述第二星载UPF，包括：
为所述第二卫星终端创建专用业务流时，在第一信令中写入所述第一星载UPF的节点信息；
将携带有所述第一星载UPF的节点信息的所述第一信令发送给所述第二星载UPF。
可选的，所述将所述第二星载UPF的节点信息发送给所述第一星载UPF，包括：
为所述第一卫星终端创建专用业务流时，在第二信令中写入所述第二星载UPF的节点信息；
将携带有所述第二星载UPF的节点信息的所述第二信令发送给所述第一星载UPF。
可选的，所述第一星载UPF的节点信息为所述第一星载UPF的标签信息和/或接口的地址信息；
所述第二星载UPF的节点信息为所述第二星载UPF的标签信息和/或接口的地址信息。
本发明实施例公开了一种端到端进行通信的方法，所述方法应用于星载UPF，包括：
当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有所述第二星载UPF的 节点信息发送给地面信关站；
所述第一星载UPF接收地面信关站发送的所述第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的所述第一星载UPF的节点信息并保存；
当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到所述对端的星载UPF。
可选的，还包括：
除所述第一星载UPF和第二星载UPF外的任意一个星载UPF，在接收到所述业务报文后，解析所述业务报文，得到所述对端的星载UPF的节点信息；
若当前的星载UPF不是所述对端的星载UPF，根据所述对端的星载UPF的节点信息，确定下一跳的星载UPF；
将所述业务报文通过星间链路发送到所述下一跳的星载UPF。
可选的，所述当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并基于所述对端的星载UPF的节点信息，通过星间链路将所述业务报文发送到对端星载UPF包括：
当所述第一星载UPF或者第二星载UPF接收到业务报文后检测所述业务报文的业务类型；
若所述业务报文为语音业务，则在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
本发明实施例公开了一种地面信关站，包括：
第一解析单元，用于当地面信关站接收到第一卫星终端发送的呼叫报文后，解析所述呼叫报文，得到所述第一星载UPF的节点信息；所述第一星载UPF为所述第一卫星终端接入的卫星的UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
第一发送单元，用于将所述呼叫报文发送给所述第二卫星终端；
第二解析单元，用于当接收到所述第二卫星终端反馈的响应报文后，解析所述响应报文，得到所述第二星载UPF的节点信息；所述第二星载UPF为所 述第二卫星终端接入的卫星的UPF；
第二发送单元，用于将所述第一星载UPF的节点信息发送给所述第二星载UPF，将所述第二星载UPF的节点信息发送给所述第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为所述第一卫星终端和所述第二卫星终端通过星间链路直接进行通信的依据。
本发明实施例公开了一种星载UPF，包括：
第一发送单元，用于当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
第二发送单元，用于当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有所述第二星载UPF的节点信息发送给地面信关站；
保存单元，用于所述第一星载UPF接收地面信关站发送的所述第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的所述第一星载UPF的节点信息并保存；
通讯单元，用于当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到所述对端的星载UPF。
本发明实施例公开了一种端到端进行通信的系统，所述系统包括：
地面信关站、星载UPF和卫星终端；
第一卫星终端用于发送呼叫请求对应的呼叫报文；
第二卫星终端用于针对所述呼叫报文反馈响应报文；
地面信关站用于执行上述应用于所述地面信关站的端到端进行通信的方法；
星载UPF用于执行上述应用于星载UPF的端到端进行通信的方法。
本发明实施例公开了一种端到端进行通信的方法、装置及系统，包括：
地面信关站在接收到包含星载UPF的节点信息的会话请报文后，通过解析该呼叫报文得到第一星载UPF的节点信息，在接收到第二卫星终端发送的反馈的响应报文时，通过解析该响应报文，得到第二星载UPF的节点信息，并将第 一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，那么当第一星载UPF或者第二星载UPF接收到业务报文后，在业务报文中写入对端的星载UPF的节点信息，并基于对端的星载UPF的节点信息，通过星间链路将所述业务报文发送到对端星载UPF。由此，实现了卫星终端通过星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1示出了现有技术中卫星通信网络的示意图；
图2示出了本发明实施例提供的一种端到端进行通信的方法的交互流程示意图；
图3示出了本发明实施例提供的一种端到进行通信的方法的实施例1的示意图；
图4示出了本发明实施例提供的一种端到端进行通信的方法的实施例2的示意图；
图5示出了本发明实施例提供的一种端到端进行通信的装置的结构示意图；
图6示出了本发明实施例提供的一种端到端进行通信的装置的又一结构示意图；
图7示出了本发明实施例提供的一种端到端进行通信的系统的结构示意图；
图8示出了本发明实施例提供的一种地面信关站的结构示意图；
图9示出了本发明实施例提供的一种星载UPF的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如下为本实施例中出现的英文缩写的解释：
Figure PCTCN2021113464-appb-000001
实施例1
参考图2，示出了本发明实施例提供的一种端到端进行通信的方法的交互流程示意图，在本实施例中，该方法包括：
S201：第一卫星终端和第二卫星终端分别通过相对应的星载AN接入地面信关站；
其中，第一卫星终端和第二卫星终端接入地面信关站的方法可以包括多种，本实施例中，不进行限定。
优选的，第一卫星终端接入地面信关站的方法包括：
第一卫星终端接入第一星载AN，第一星载AN所对应的第一星载UPF将该接入消息发送给地面信关站。其中地面信关站包括核心网控制面和地面UPF(或者可以理解核心网用户面)，核心网控制面接收到接入请求，并将该接入请求发送到地面UPF，地面UPF创建用户面上下文，此时表示第一卫星终端成功接入地面信关站。
在另一实施例中，第一卫星终端接入地面信关站的方法包括：
第一卫星终端接入第一星载AN，第一星载AN所对应的第一星载UPF将该接入消息转发至与地面信关站存在馈电电路的目标星载UPF，目标星载UPF通过馈电电路将该接入消息发送给地面信关站。其中地面信关站包括核心网控制面和地面UPF(或者可以理解核心网用户面)，核心网控制面接收到接入请求，并将该接入请求发送到地面UPF，地面UPF创建用户面上下文，此时表示第一卫星终端成功接入地面信关站。
其中，第一卫星终端接入地面信关站后，此时用户数据报文经由第一星载AN、第一星载UPF、地面UPF传输至数据网络或者IMS网络
优选的，第二卫星终端接入地面信关站的方法，包括：
第二卫星终端接入第二卫星AN，第二卫星AN所对应的第二星载UPF将该接入消息发送给地面信关站。其中地面信关站包括核心网控制面和地面UPF(或者可以理解核心网用户面)，核心网控制面接收到接入请求，并将该接入请求发送到地面UPF，地面UPF创建用户面上下文，此时表示第二卫星终端成功接入地面信关站。
其中，第二卫星终端接入地面信关站后，此时用户数据报文经由第二星载AN、第二星载UPF、地面UPF传输数据网络或者IMS网络。
S202：第一卫星终端发起呼叫请求时，将呼叫报文发送给第一星载UPF；所述呼叫报文包括与第二卫星终端创建会话请求的相关信息，所述第一星载UPF为所述第一卫星终端接入的卫星；
本实施例中，第一卫星终端发起呼叫请求后，呼叫报文首先达到第一星载UPF，例如，呼叫报文可以为INVITE报文。
S203：第一星载UPF在所述呼叫报文中写入第一星载UPF的节点信息，并将携带有第一星载UPF节点信息的呼叫报文发送给地面信关站；
本实施例中，第一星载UPF在接收到呼叫报文后，在呼叫报文中写入第一星载UPF的节点信息，优选的，可以在呼叫报文的扩展头上增加第一星载UPF的节点信息。
其中，第一星载UPF的节点信息可以为第一星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第一星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第一星载UPF节点信息为第一星载UPF的标签信息。
S204：地面信关站接收到第一星载UPF发送的呼叫报文后，解析所述呼叫报文，得到所述呼叫报文中第一星载UPF的节点信息；
地面信关站包括核心网控制面、UPF和业务网络(该业务网络包括数据网络或者IMS网络)等。
当地面信关站的核心网控制面接收到呼叫报文后，发送给地面UPF，地面UPF将呼叫报文发送给数据网络或者IMS网络，其中，若呼叫报文为语音呼叫业务，则将呼叫报文发送给IMS网络，其中，若第一卫星终端和第二卫星终端不属于同一个IMS网络，则地面UPF将呼叫报文发送给第一卫星终端所属的IMS网络，再通过第一卫星终端所属的IMS网络，将呼叫报文发送给第二卫星终端所属的IMS网络。
第二卫星终端所属的IMS网络对所述业务报文进行解析，得到第一星载UPF的节点信息。
S205：地面信关站将呼叫报文发送给第二卫星终端；
S206：第二卫星终端向第二星载UPF发送响应报文；所述第二星载UPF为所述第二卫星终端接入的卫星；
S207：第二星载UPF在所述响应报文中写入第二星载UPF的节点信息，并将携带有第二星载UPF的节点信息的响应报文发送给地面信关站；
本实施例中，第二星载UPF在接收到呼叫报文后，在呼叫报文中写入第二星载UPF的节点信息，优选的，可以在呼叫报文的扩展头上增加第二星载UPF的节点信息。
其中，第二星载UPF的节点信息可以为第二星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第二星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第二星载UPF节点信息为第一星载UPF的标签信息。
S208：地面信关站接收到响应报文后，从所述响应报文中解析出第二星载UPF的节点信息；
S209：地面信关站分别为所述第一卫星终端和第二卫星终端创建专用业务流，在为所述第二卫星终端创建专用业务流的过程中，地面信关站将第一星载的节点信息发送给第二星载UPF，在为所述第一卫星终端创建专用业务流的过程中将第二星载的节点信息发送给第一星载UPF；
本实施例中，在为第二卫星终端创建专用业务流时，在地面信关站与第二星载UPF通信的信令中写入第一星载UPF的节点信息，优选的，可以在地面信关站与第二星载UPF通信的信令的扩展信元中写入第一星载UPF的节点信息。
在一种实施方式下，在为第二卫星终端创建专用业务流时，在地面信关站的核心网控制面向第二星载UPF之间进行通信的信令的扩展信元中写入第一星载UPF的节点信息，并将第一星载UPF的节点信息发送给第二星载UPF。
本实施例中，在为第一卫星终端创建专用业务流时，在地面信关站与第一星载UPF通信的信令中写入第二星载UPF的节点信息，优选的，可以在地面信关站与第一星载UPF通信的信令的扩展信元中写入第二星载UPF的节点信息。
在一种实施方式下，在为第一卫星终端创建专用业务流时，在地面信关站的核心网控制面向第一星载UPF之间进行通信的信令的扩展信元中写入第二星载UPF的节点信息，并将第二星载UPF的节点信息发送给第一星载UPF。
S210：第一星载UPF接收地面信关站发送的第二星载UPF的节点信息并保存，第二星载UPF接收地面信关站发送的第一星载UPF的节点信息并保存；
S211：当第一星载UPF接收到第一卫星终端发送的业务报文，或者第二星载UPF接收到第二卫星终端发送的业务报文后，在所述业务报文中写入对端的星载UPF的节点信息，并通过星间链路和对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
由此，当任意一个星载UPF接收到的业务报文中包含对端的星载UPF的节点信息时，可以通过该对端的星载UPF的节点信息确定下一跳的星载UPF，并将该业务报文发送给下一跳的星载UPF，直至发送到节点信息匹配的对端星载UPF。其中，对端表示通信的另外一端，其中在第一卫星终端和第二卫星终端建立了会话连接口，第二卫星终端为第一卫星终端的对端，第一卫星终端为第二卫星终端的对端，相对应的，第一星载UPF为第二星载UPF的对端，第二星载UPF为第一星载UPF的对端。
本实施例中，地面信关站在接收到包含星载UPF的节点信息的会话请报文后，通过解析该呼叫报文得到第一星载UPF的节点信息，在接收到第二卫星终端发送的反馈的响应报文时，通过解析该响应报文，得到第二星载UPF的节点信息，并将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，那么当第一星载UPF或者第二星载UPF接收到 业务报文后，在业务报文中写入对端的星载UPF的节点信息，并基于对端的星载UPF的节点信息，通过星间链路将业务报文发送到对端星载UPF。由此，实现了卫星终端通过星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
实施例2
参考图3，示出了本发明实施例2提供的一种端到端进行通信的方法的流程示意图，在本实施例中，该方法应用于地面信关站，包括：
S301：当地面信关站接收到第一卫星终端发送的呼叫报文后，解析所述呼叫报文，得到第一星载UPF的节点信息；所述第一星载UPF为所述第一卫星终端接入的卫星的UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
本实施例中，第一卫星终端发起呼叫请求后，第一卫星终端向地面信关站发送呼叫报文，其中，该请求报文中包含与第二卫星终端创建会话请求的相关信息。呼叫报文在到达第一星载UPF时，第一星载UPF会在呼叫报文中写入第一星载UPF的节点信息。
其中，第一星载UPF的节点信息可以为第一星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第一星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第一星载UPF节点信息为第一星载UPF的标签信息。
如上述所述，地面信关站包括：核心网控制面、UPF和数据网络或者IMS网络等。
当地面信关站的核心网控制面接收到呼叫报文后，发送给地面UPF，地面UPF将呼叫报文发送给数据网络或者IMS网络，其中，若呼叫报文为语音呼叫业务，则将呼叫报文发送给IMS网络，其中，若第一卫星终端和第二卫星终端不属于同一个IMS网络，则地面UPF将呼叫报文发送给第一卫星终端所属的IMS网络，再通过第一卫星终端所属的IMS网络，将呼叫报文发送给第二卫星终端所属的IMS网络。
第二卫星终端所属的IMS网络对所述业务报文进行解析，得到第一星载UPF的节点信息。
S302：将所述呼叫报文发送给第二卫星终端；
S303：当接收到第二卫星终端反馈的响应报文后，解析所述响应报文，得到第二星载UPF的节点信息；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
第二卫星终端在接收到呼叫报文后，需要向地面信关站反馈响应报文，第二卫星终端发送的响应报文在到达第二星载UPF时，第二星载UPF会在响应报文中写入第二星载UPF的节点信息，并将携带有第二星载UPF的节点信息发送给地面信关站。
其中，第二星载UPF的节点信息可以为第二星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第二星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第二星载UPF节点信息为第一星载UPF的标签信息。
S304：将第一星载UPF的节点信息发送给第二星载UPF，将所述第二星载UPF的节点信息发送给第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为第一卫星终端和第二卫星终端通过星间链路直接进行通信的依据。
本实施例中，可以采用多种方式实现将第一星载UPF的节点信息发送给第二星载UPF，将所述第二星载UPF的节点信息发送给第一星载UPF的目的，本实施例中不限定采用的方法。
优选的，可以在为第一星载UPF创建专用业务流时，将第二星载UPF的节点信息发送给第一星载UPF，具体的，包括：
为所述第一卫星终端创建专用业务流时，在第一信令中写入所述第二星载UPF的节点信息；
将携带有第二星载UPF的节点信息发送给第一星载UPF。
本实施例中，当第一卫星终端所属的IMS接收到响应报文后，触发核心网控制面为该第一卫星终端创建专用业务流。
优选的，可以在为第二星载UPF创建专用业务流时，将第一星载UPF的节点信息发送给第二星载UPF，具体的，包括：
为所述第一卫星终端创建专用业务流时，在第一信令中写入所述第二星载UPF的节点信息；
将携带有第二星载UPF的节点信息发送给第一星载UPF。
本实施例中，当第二卫星终端所属的IMS接收到响应报文后，触发核心网控制面为该第二卫星终端创建专用业务流。
本实施例中，地面信关站在接收到包含星载UPF的节点信息的会话请报文后，通过解析该呼叫报文得到第一星载UPF的节点信息，在接收到第二卫星终端发送的反馈的响应报文时，通过解析该响应报文，得到第二星载UPF的节点信息，并将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，那么当第一星载UPF或者第二星载UPF接收到业务报文后，在业务报文中写入对端的星载UPF的节点信息，并基于对端的星载UPF的节点信息，通过星间链路将所述业务报文发送到对端星载UPF。由此，实现了卫星终端通过星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
实施例3
参考图4，示出了本发明实施例3提供的一种端到端进行通信的方法的实施例2的流程示意图，在本实施例中，该方法包括：
S401：当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
本实施例中，第一卫星终端发送呼叫请求，并发送呼叫报文，呼叫报文达到第一星载UPF后，为了让地面信关站得知第一星载UPF的节点信息，并将该节点信息发送给第二星载UPF，第一星载UPF在呼叫报文中写入了第一星载UPF的节点信息，优选的，可以在呼叫报文的扩展头上写入第一星载UPF的节点信息。
其中，第一星载UPF的节点信息可以为第一星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第一星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第一星载UPF节点信息为第一星载UPF的标签信息。
S402：当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有第二星载UPF 的节点信息发送给地面信关站；
地面信关站将呼叫发送给第二卫星终端，第二卫星终端反馈响应报文，当响应报文到达第二星载UPF后，第二星载UPF将第二星载UPF的节点信息写入响应报文中，并将携带有第二星载UPF的节点信息发送给地面信关站。
其中，第二星载UPF的节点信息可以为第二星载UPF的标签信息或者接口的地址信息，优选的，若星载采用N6接口，则第二星载UPF的节点信息可以为接口的地址信息，若星载采用N9接口，为了降低各个星载UPF的运算量，第二星载UPF节点信息为第一星载UPF的标签信息。
S403：所述第一星载UPF接收地面信关站发送的第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的第一星载UPF的节点信息并保存；
本实施例中，地面信关站将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，将第一星载UPF的节点信息发送给第二星载UPF。
第一星载UPF在接收到地面信关站发送的第二星载UPF的节点信息后，保存该第二星载UPF的节点信息；第二星载UPF在接收到地面信关站发送的第一星载UPF的节点信息后，保存该第一星载UPF的节点信息。
S404：当第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入保存的对端的星载UPF的节点信息，并通过星间链路和对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
本实施例中，当第一星载UPF和第二星载UPF建立了会话连接后，第一星载UPF为第二星载UPF的对端，第二星载UPF为第一星载UPF的对端。
其中，业务报文在卫星之间进行通信时，可以通过报文中写入的对端的星载UPF的节点信息，确定卫星之间的传输路线，从而通过星间链路传输报文。
优选的，在卫星之间传输业务报文的过程中，包括：
针对任意一个星载UPF：
当接收到业务报文后，解析所述业务报文，得到对端的星载UPF的节点信息；
若当前的星载UPF不是对端的星载UPF的节点信息，根据所述对端的星载UPF的节点信息，确定下一跳的星载UPF的节点信息；
将所述业务报文通过星间链路发送到下一跳的星载UPF的节点信息。
进一步的，由于卫星资源有限，为了降低卫星的负荷，本实施例中，只允许安全性要求较高的通信直接通过卫星进行通信，优选的，可以将语音业务直接通过卫星进行传输，由此，还包括：检测接收到的业务报文的类型；
若所述业务报文为语音报文，则在所述业务报文中写入对端的星载UPF的节点信息，并通过星间链路和对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
其中，对于非语音业务的报文，星载UPF接收到业务报文后，转换地面信关站，并通过地面信关站转发到目的端。
本实施例中，第一星载UPF接收到第一卫星终端发送的呼叫报文后，将本星载UPF的节点信息写入到呼叫报文中，并将呼叫报文发送给地面信关站,地面信解析该呼叫报文得到第一星载UPF的节点信息。第二星载UPF接收到第二卫星终端反馈的响应报文后，将本星载UPF的节点信息写入到响应报文中，并将呼叫报文发送给地面信关站，地面通过解析该响应报文，得到第二星载UPF的节点信息，并将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，那么当第一星载UPF或者第二星载UPF接收到业务报文后，在业务报文中写入对端的星载UPF的节点信息，并基于对端的星载UPF的节点信息，通过星间链路将所述业务报文发送到对端星载UPF。由此，实现了卫星终端通过星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
实施例4
参考图5，示出了本发明实施例提供的一种端到端进行通信的装置的结构示意图，在本实施例中，该装置应用于地面信关站，包括：
第一解析单元501，用于当地面信关站接收到第一卫星终端发送的呼叫报文后，解析所述呼叫报文，得到所述第一星载UPF的节点信息；所述第一星载UPF为所述第一卫星终端接入的卫星的UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
第一发送单元502，用于将所述呼叫报文发送给第二卫星终端；
第二解析单元503，用于当接收到第二卫星终端反馈的响应报文后，解析 所述响应报文，得到第二星载UPF的节点信息；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
第二发送单元504，用于将第一星载UPF的节点信息发送给第二星载UPF，将所述第二星载UPF的节点信息发送给第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为第一卫星终端和第二卫星终端通过星间链路直接进行通信的依据。
可选的，所述第二发送单元，包括：
第一写入子单元，用于为所述第二卫星终端创建专用业务流时，在第一信令中写入所述第一星载UPF的节点信息；
第一发送子单元，用于将携带有所述第一星载UPF的节点信息的所述第一信令发送给所述第二星载UPF。
可选的，所述第二发送单元，包括：
第二写入子单元，用于为所述第二卫星终端创建专用业务流时，在第一信令中写入所述第二星载UPF的节点信息；
第二发送子单元，用于将携带有所述第二星载UPF的节点信息的所述第二信令发送给所述第一星载UPF。
可选的，所述第一星载UPF的节点信息为所述第一星载UPF的标签信息和/或接口的地址信息；
所述第二星载UPF的节点信息为所述第二星载UPF的标签信息和/或接口的地址信息。
本实施例的装置，在第一卫星终端和第二卫星终端在创建会话连接的过程中，地面信关站通过分别与第一星载UPF和第二星载UPF进行交互，将第一星载UPF的节点信息发送给第二星载UPF，将第二星载UPF的节点信息发送给第一星载UPF，从而，实现了星载和星载之间直接进行通信的目的。
实施例5
参考图6，示出了本发明实施例提供的一种端到端进行通讯的装置的又一结构示意图，在本实施例中，该装置应用于星载UPF，该装置包括：
第一发送单元601，用于当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带 有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
第二发送单元602，用于当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有第二星载UPF的节点信息发送给地面信关站；
保存单元603，用于所述第一星载UPF接收地面信关站发送的第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的第一星载UPF的节点信息并保存；
第一通讯单元604，用于当第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入保存的对端的星载UPF的节点信息，并通过星间链路和对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
可选的，所述第一通讯单元，包括：
第一解析子单元，用于除所述第一星载UPF和第二星载UPF外的任意一个星载UPF，在接收到所述业务报文后，解析所述业务报文，得到所述对端的星载UPF的节点信息；
确定子单元，用于若当前的星载UPF不是所述对端的星载UPF，根据所述对端的星载UPF的节点信息，确定下一跳的星载UPF；
发送子单元，用于将所述业务报文通过星间链路发送到所述下一跳的星载UPF。
可选的，还包括：
检测单元，用于当所述第一星载UPF或者第二星载UPF接收到业务报文后，检测所述业务报文的业务类型；
第二通讯单元，用于若所述业务报文为语音业务，则在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
通过本实施例的装置，实现了星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
实施例5
参考图7，示出了本发明实施例提供的一种端到端进行通讯的系统的结构 示意图，在本实施例中，该系统包括：
地面信关站700、星载UPF701和卫星终端702，所述卫星终端包括：第一卫星终端7021和第二卫星终端7022；
第一卫星终端7021用于发送呼叫请求对应的呼叫报文；
第二卫星终端7022用于针对所述呼叫报文反馈响应报文；
地面信关站700用于执行上述实施例2中所述的端到端进行通信的方法；
星载UPF701用于执行上述实施例3中所述的端到端进行通信的方法；
所述地面信关站包括：核心网控制面、地面UPF和业务网络。
实施例6
参考图8，示出了本发明实施例提供的一种地面信关站的结构示意图，在本实施例中，该地面信关站包括：
核心网控制面801、地面UPF802和业务网络803；
所述核心网控制面接收到第一卫星终端发送的呼叫报文后，发送给地面UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
所述地面UPF将接收到得所述呼叫报文转发给第二卫星终端所属的业务网络和第二星载UPF；
第二卫星终端所属的业务网络对所述业务报文进行解析，得到第一星载UPF的节点信息；
所述核心网控制面接收到第二卫星终端发送的响应报文后，发送给地面UPF；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
所述地面UPF将所述响应报文发送给所述第一星载UPF所属的业务网络；
第一星载UPF所属的业务网络解析所述响应报文，得到所述第二星载UPF的节点信息；
所述核心网控制面将所述第一星载UPF的节点信息发送给所述第二星载UPF，将所述第二星载UPF的节点信息发送给所述第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为所述第一卫星终端和所述第二卫星终端通过星间链路直接进行通信的依据。
可选的，所述核心网控制面还用于：
为所述第二卫星终端创建专用业务流时，在第一信令中写入所述第一星载UPF的节点信息；
将携带有所述第一星载UPF的节点信息的所述第一信令发送给所述第二星载UPF。
可选的，所述核心网控制面还用于：
为所述第一卫星终端创建专用业务流时，在第二信令中写入所述第二星载UPF的节点信息；
将携带有所述第二星载UPF的节点信息的所述第二信令发送给所述第一星载UPF。
可选的，所述第一星载UPF的节点信息为所述第一星载UPF的标签信息和/或接口的地址信息；
所述第二星载UPF的节点信息为所述第二星载UPF的标签信息和/或接口的地址信息。
通过本实施例提供的核心网控制面，实现了星载和星载之间直接进行通信的方法，无需通过地面信关站转发，从而大大提升了通信的安全性能。
实施例7
参考图9，示出了本发明实施例提供的一种星载UPF的结构示意图，在本实施例中，该星载UPF包括：
第一通信设备901，用于当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
第二通信设备902，用于当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有所述第二星载UPF的节点信息发送给地面信关站；
存储设备903，用于所述第一星载UPF接收地面信关站发送的所述第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的所述第一星载UPF的节点信息并保存；
第三通信设备904，用于当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并 通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到所述对端的星载UPF。
可选的，所述星载UPF还用于：
除所述第一星载UPF和第二星载UPF外的任意一个星载UPF，在接收到所述业务报文后，解析所述业务报文，得到所述对端的星载UPF的节点信息；
若当前的星载UPF不是所述对端的星载UPF，根据所述对端的星载UPF的节点信息，确定下一跳的星载UPF；
将所述业务报文通过星间链路发送到所述下一跳的星载UPF。
可选的，所述星载UPF还用于：
当所述第一星载UPF或者第二星载UPF接收到业务报文后，检测所述业务报文的业务类型；
若所述业务报文为语音业务，则在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到对端的星载UPF。
需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。

Claims (10)

  1. 一种端到端进行通信的方法，其特征在于，所述方法应用于地面信关站，包括：
    当地面信关站接收到第一卫星终端发送的呼叫报文后，解析所述呼叫报文，得到所述第一星载UPF的节点信息；所述第一星载UPF为所述第一卫星终端接入的卫星的UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
    将所述呼叫报文发送给所述第二卫星终端；
    当接收到所述第二卫星终端反馈的响应报文后，解析所述响应报文，得到所述第二星载UPF的节点信息；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
    将所述第一星载UPF的节点信息发送给所述第二星载UPF，将所述第二星载UPF的节点信息发送给所述第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为所述第一卫星终端和所述第二卫星终端通过星间链路直接进行通信的依据。
  2. 根据权利要求1所述的方法，其特征在于，所述将所述第一星载UPF的节点信息发送给所述第二星载UPF，包括：
    为所述第二卫星终端创建专用业务流时，在第一信令中写入所述第一星载UPF的节点信息；
    将携带有所述第一星载UPF的节点信息的所述第一信令发送给所述第二星载UPF。
  3. 根据权利要求1所述的方法，其特征在于，所述将所述第二星载UPF的节点信息发送给所述第一星载UPF，包括：
    为所述第一卫星终端创建专用业务流时，在第二信令中写入所述第二星载UPF的节点信息；
    将携带有所述第二星载UPF的节点信息的所述第二信令发送给所述第一星载UPF。
  4. 根据权利要求1所述的方法，其特征在于，
    所述第一星载UPF的节点信息为所述第一星载UPF的标签信息和/或接口的地址信息；
    所述第二星载UPF的节点信息为所述第二星载UPF的标签信息和/或接口的地址信息。
  5. 一种端到端进行通信的方法，其特征在于，所述方法应用于星载UPF，包括：
    当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
    当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有所述第二星载UPF的节点信息发送给地面信关站；
    所述第一星载UPF接收地面信关站发送的所述第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的所述第一星载UPF的节点信息并保存；
    当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到所述对端的星载UPF。
  6. 根据权利要求5所述的方法，其特征在于，还包括：
    除所述第一星载UPF和第二星载UPF外的任意一个星载UPF，在接收到所述业务报文后，解析所述业务报文，得到所述对端的星载UPF的节点信息；
    若当前的星载UPF不是所述对端的星载UPF，根据所述对端的星载UPF的节点信息，确定下一跳的星载UPF；
    将所述业务报文通过星间链路发送到所述下一跳的星载UPF。
  7. 根据权利要求5所述的方法，其特征在于，所述当所述第一星载UPF或者第二星载UPF接收到业务报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并基于所述对端的星载UPF的节点信息，通过星间链路将所述业务报文发送到对端星载UPF，包括：
    当所述第一星载UPF或者第二星载UPF接收到业务报文后，检测所述业务报文的业务类型；
    若所述业务报文为语音业务，则在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将 所述业务报文发送到对端的星载UPF。
  8. 一种地面信关站，其特征在于，包括：
    核心网控制面、地面UPF和业务网络；
    所述核心网控制面接收到第一卫星终端发送的呼叫报文后，发送给地面UPF；所述呼叫报文包括请求与第二卫星终端创建会话的相关信息；
    所述地面UPF将接收到得所述呼叫报文转发给第二卫星终端所属的业务网络和第二星载UPF；
    第二卫星终端所属的业务网络对所述业务报文进行解析，得到第一星载UPF的节点信息；
    所述核心网控制面接收到第二卫星终端发送的响应报文后，发送给地面UPF；所述第二星载UPF为所述第二卫星终端接入的卫星的UPF；
    所述地面UPF将所述响应报文发送给所述第一星载UPF所属的业务网络；
    第一星载UPF所属的业务网络解析所述响应报文，得到所述第二星载UPF的节点信息；
    所述核心网控制面将所述第一星载UPF的节点信息发送给所述第二星载UPF，将所述第二星载UPF的节点信息发送给所述第一星载UPF；所述第一星载UPF的节点信息和第二星载UPF的节点信息为所述第一卫星终端和所述第二卫星终端通过星间链路直接进行通信的依据。
  9. 一种星载UPF，其特征在于，包括：
    第一通信设备，用于当第一星载UPF接收到第一卫星终端发送的呼叫报文后，将所述第一星载UPF的节点信息写入到所述呼叫报文中，并将携带有所述第一星载UPF的节点信息的呼叫报文发送给地面信关站；
    第二通信设备，用于当第二星载UPF接收到第二卫星终端发送的响应报文后，将所述第二星载UPF的节点信息写入到所述响应报文中，并将携带有所述第二星载UPF的节点信息发送给地面信关站；
    存储设备，用于所述第一星载UPF接收地面信关站发送的所述第二星载UPF的节点信息并保存，所述第二星载UPF接收地面信关站发送的所述第一星载UPF的节点信息并保存；
    第三通信设备，用于当所述第一星载UPF或者第二星载UPF接收到业务 报文后，在所述业务报文中写入所述保存的对端的星载UPF的节点信息，并通过星间链路和所述对端的星载UPF的节点信息将所述业务报文发送到所述对端的星载UPF。
  10. 一种端到端进行通信的系统，其特征在于，所述系统包括：
    地面信关站、星载UPF和卫星终端；
    第一卫星终端用于发送呼叫请求对应的呼叫报文；
    第二卫星终端用于针对所述呼叫报文反馈响应报文；
    地面信关站用于执行上述权利要求1-4中任意一项所述的端到端进行通信的方法；
    星载UPF用于执行上述权利要求5-7中任意一项所述的端到端进行通信的方法。
PCT/CN2021/113464 2021-08-19 2021-08-19 端到端进行通信的方法、地面信关站、星载upf和系统 Ceased WO2023019503A1 (zh)

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