WO2023019503A1

WO2023019503A1 - End-to-end communication method and system, and ground gateway station and satellite-borne upf

Info

Publication number: WO2023019503A1
Application number: PCT/CN2021/113464
Authority: WO
Inventors: 王振; 颜小飞
Original assignee: 海能达通信股份有限公司
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2023-02-23

Abstract

An end-to-end communication method, apparatus and system. The method comprises: after receiving a call message that includes node information of a first satellite-borne UPF, a ground gateway station obtaining the node information of the first satellite-borne UPF by means of parsing the call message; when receiving a response message fed back by a second satellite terminal, the ground gateway station obtaining node information of a second satellite-borne UPF by means of parsing the response message, sending the node information of the first satellite-borne UPF to the second satellite-borne UPF, and sending the node information of the second satellite-borne UPF to the first satellite-borne UPF; and after receiving a service message, the first satellite-borne UPF or the second satellite-borne UPF writing the node information of the satellite-borne UPF of a peer end into the service message, and sending the service message to the satellite-borne UPF of the peer end by means of an inter-satellite link on the basis of the node information of the satellite-borne UPF of the peer end. Therefore, a method in which satellite terminals directly communicate by means of satellite-borne UPFs is realized without the forwarding of a ground gateway station being necessary, thereby significantly improving the security performance of the communication.

Description

End-to-end communication method, ground gateway station, spaceborne UPF and system

technical field

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.

Background technique

As shown in Figure 1, in the satellite network, the access network AN is on the satellite, the core network control plane is deployed on the ground gateway station, and 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).

When the satellite terminal communicates, 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. However, when 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.

Contents of the invention

In view of this, 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:

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;

sending the call message to 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;

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 first on-board UPF 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.

Optionally, the sending the node information of the first on-board UPF to the second on-board UPF includes:

When creating a dedicated service flow for the second satellite terminal, write the node information of the first on-board UPF in the first signaling;

sending the first signaling carrying the node information of the first on-board UPF to the second on-board UPF.

Optionally, the sending the node information of the second on-board UPF to the first on-board UPF includes:

When creating a dedicated service flow for the first satellite terminal, write the node information of the second on-board UPF in the second signaling;

sending the second signaling carrying the node information of the second on-board UPF to the first on-board UPF.

Optionally, 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:

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;

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;

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.

Optionally, also include:

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 ;

If 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;

Send the service message to the next-hop on-board UPF through the inter-satellite link.

Optionally, after the first on-board UPF or the second on-board UPF receives the service message, write the saved node information of the opposite end of the on-board UPF into the service message, and Based on the node information of the on-board UPF of the opposite end, sending the service message to the on-board UPF of the opposite end through the inter-satellite link includes:

Detecting the service type of the service message after the first on-board UPF or the second on-board UPF receives the service message;

If 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:

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. When receiving the message, by analyzing the response message, 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. As a result, 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.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

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.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The following is an explanation of the English abbreviations that appear in this embodiment:

Example 1

Referring to 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. In this embodiment, the method includes:

S201: the first satellite terminal and the second satellite terminal respectively access the ground gateway through the corresponding spaceborne AN;

There 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.

Preferably, 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.

In another 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 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.

Among them, after the first satellite terminal accesses 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.

Preferably, 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.

Wherein, after the second satellite terminal accesses 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.

S202: 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;

In this embodiment, 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.

S203: 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;

In this embodiment, 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. Preferably, the first on-board UPF can be added to the extension header of the call message. Load the node information of UPF.

Wherein, 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.

S204: 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.

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;

S206: 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;

S207: 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;

In this embodiment, 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. Preferably, the second on-board UPF can be added to the extension header of the call message. Load the node information of UPF.

Wherein, 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.

S208: After receiving the response message, the ground gateway station parses out the node information of the second on-board UPF from the response message;

S209: 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;

In this embodiment, when creating a dedicated service flow for the second 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.

In one embodiment, when creating a dedicated service flow for the second satellite terminal, write the first node information of the on-board UPF, and send the node information of the first on-board UPF to the second on-board UPF.

In this embodiment, when creating a dedicated service flow for the first satellite terminal, 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.

In one embodiment, when creating a dedicated service flow for the first satellite terminal, write the second node information of the on-board UPF, and send the node information of the second on-board UPF to the first on-board UPF.

S210: 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;

S211: After the first on-board UPF receives the service message sent by the first satellite terminal, or the second on-board UPF receives the service message sent by the second satellite terminal, write the service message of the opposite end into the service message The node information of the on-board UPF, and send the service message to the peer UPF through the inter-satellite link and the node information of the peer star-borne UPF.

Therefore, when the service message received by any on-board UPF contains the node information of the peer on-board UPF, 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. Among them, 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. Correspondingly, the first on-board UPF is the opposite end of the second on-board UPF, and the second on-board UPF is the opposite end of the first on-board UPF.

In this embodiment, 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. When the feedback response message is received, 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. As a result, 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.

Example 2

Referring to FIG. 3 , it shows a schematic flowchart of a method for end-to-end communication provided by Embodiment 2 of the present invention. In this embodiment, the method is applied to a ground gateway station, including:

S301: 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;

In this embodiment, 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. When 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.

As mentioned above, the ground gateway station includes: core network control plane, UPF and data network or IMS network, etc.

S302: Send the call message to the second satellite terminal;

S303: After receiving the response message fed back by the second satellite terminal, parse the response message to obtain the node information of the second on-board UPF; the second on-board UPF is the node accessed by the second satellite terminal Satellite UPF;

After the second satellite terminal receives the calling message, it needs to feed back a response message to the ground gateway station. When 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.

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.

In this embodiment, 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.

Preferably, when creating a dedicated service flow for the first on-board UPF, the node information of the second on-board UPF is sent to the first on-board UPF, specifically, including:

When creating a dedicated service flow for the first satellite terminal, write the node information of the second on-board UPF in the first signaling;

Send the node information carrying the second on-board UPF to the first on-board UPF.

In this embodiment, after receiving the response message, 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.

Preferably, when creating a dedicated service flow for the second on-board UPF, the node information of the first on-board UPF is sent to the second on-board UPF, specifically, including:

In this embodiment, after receiving the response message, 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.

In this embodiment, 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. When the feedback response message is received, 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. As a result, the method of direct communication between satellite terminals and satellite terminals is realized, without forwarding through ground gateway stations, thereby greatly improving the security performance of communication.

Example 3

Referring to FIG. 4 , it shows a schematic flowchart of Embodiment 2 of a method for end-to-end communication provided by Embodiment 3 of the present invention. In this embodiment, the method includes:

S401: After the first on-board UPF receives the call message sent by the first satellite terminal, write the node information of the first on-board UPF into the call message, and carry the first The call message of the node information of the spaceborne UPF is sent to the ground gateway station;

In this embodiment, the first satellite terminal sends a call request and sends a call message. After 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. Preferably, the first on-board UPF can be written in the extension header of the call message. UPF node information.

S402: After the second on-board UPF receives the response message sent by the second satellite terminal, write the node information of the second on-board UPF into the response message, and carry the second on-board UPF The node information of UPF is sent to the ground gateway station;

The ground gateway station sends the call to the second satellite terminal, and the second satellite terminal feeds back a response message. When 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 In the response message, the node information carrying the second on-board UPF is sent to the ground gateway station.

S403: 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;

In this embodiment, 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.

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.

S404: After the first on-board UPF or the second on-board UPF receives the service message, write the saved node information of the peer's on-board UPF into the service message, and communicate with the peer's node information through the inter-satellite link The node information of the on-board UPF sends the service message to the peer on-board UPF.

In this embodiment, after the first on-board UPF and the second on-board UPF establish a session connection, the first on-board UPF is the opposite end of the second on-board UPF, and the second on-board UPF is the peer of the first on-board UPF. Peer.

Among them, when the service message is communicated between satellites, 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.

Preferably, the process of transmitting service messages between satellites includes:

For any on-board UPF:

After receiving the service message, analyze the service message to obtain the node information of the on-board UPF at the opposite end;

If the current on-board UPF is not the node information of the on-board UPF of the opposite end, determine the node information of the next-hop on-board UPF according to the node information of the on-board UPF of the opposite end;

The node information of the on-board UPF that sends the service message to the next hop through the inter-satellite link.

Further, due to limited satellite resources, in order to reduce the load on the satellite, in this embodiment, only communications with higher security requirements are allowed to communicate directly through the satellite. Preferably, the voice service can be directly transmitted through the satellite, thus, It also includes: detecting the type of the received service message;

If the service message is a voice message, then 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.

Among them, for the message of non-voice service, after receiving the service message, the on-board UPF converts the ground gateway station and forwards it to the destination end through the ground gateway station.

In this embodiment, 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. 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. In response to the message, 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 When 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. As a result, 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.

Example 4

Referring to FIG. 5, it shows a schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention. In this embodiment, 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.

Optionally, 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.

Optionally, 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.

In the device of this embodiment, 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.

Example 5

Referring to FIG. 6 , it shows another schematic structural diagram of a device for end-to-end communication provided by an embodiment of the present invention. In this embodiment, 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.

Optionally, 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.

Optionally, also include:

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.

Through the device of this embodiment, 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.

Example 5

Referring to Fig. 7, it shows a schematic structural diagram of a system for end-to-end communication provided by an embodiment of the present invention. In this embodiment, 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.

Example 6

Referring to FIG. 8 , it shows a schematic structural diagram of a ground gateway station provided by an embodiment of the present invention. In this embodiment, the ground gateway station includes:

Core network control plane 801, ground UPF 802 and service network 803;

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;

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.

Optionally, the core network control plane is also used for:

Through the core network control plane provided in this embodiment, 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.

Example 7

Referring to FIG. 9 , it shows a schematic structural diagram of an on-board UPF provided by an embodiment of the present invention. In this embodiment, 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. One-star UPF node information and save;

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.

Optionally, the onboard UPF is also used for:

After the first on-board UPF or the second on-board UPF receives the service message, detect the service type of the service message;

It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can.

Claims

A method for end-to-end communication, characterized in that the method is applied to a ground gateway station, including:

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;

sending the call message to 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;

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 first on-board UPF 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 method according to claim 1, wherein the sending the node information of the first on-board UPF to the second on-board UPF includes:

When creating a dedicated service flow for the second satellite terminal, write the node information of the first on-board UPF in the first signaling;

sending the first signaling carrying the node information of the first on-board UPF to the second on-board UPF.
The method according to claim 1, wherein the sending the node information of the second on-board UPF to the first on-board UPF includes:

When creating a dedicated service flow for the first satellite terminal, write the node information of the second on-board UPF in the second signaling;

sending the second signaling carrying the node information of the second on-board UPF to the first on-board UPF.
The method according to claim 1, characterized in that,

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 for end-to-end communication, characterized in that the method is applied to a spaceborne UPF, including:

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;

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;

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.
The method according to claim 5, further comprising:

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 ;

If 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;

Send the service message to the next-hop on-board UPF through the inter-satellite link.
The method according to claim 5, characterized in that, after the first on-board UPF or the second on-board UPF receives the service message, write the saved pair in the service message. The node information of the on-board UPF of the peer, and based on the node information of the star-borne UPF of the peer, send the service message to the star-borne UPF of the peer through the inter-satellite link, including:

After the first on-board UPF or the second on-board UPF receives the service message, detect the service type of the service message;

If 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.
A ground gateway station, characterized in that it comprises:

Core network control plane, ground UPF and service network;

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;

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.
A spaceborne UPF is characterized in that it comprises:

The first communication device 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 communication device 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 storage device 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 third communication device 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 opposite end of the 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.
A system for end-to-end communication, characterized in that 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 perform the end-to-end communication method described in any one of the above claims 1-4;

The on-board UPF is used to implement the method for end-to-end communication described in any one of claims 5-7 above.