CN113225124B - Method, system, device and medium for establishing satellite terminal end-to-end communication link - Google Patents
Method, system, device and medium for establishing satellite terminal end-to-end communication link Download PDFInfo
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- CN113225124B CN113225124B CN202110494170.XA CN202110494170A CN113225124B CN 113225124 B CN113225124 B CN 113225124B CN 202110494170 A CN202110494170 A CN 202110494170A CN 113225124 B CN113225124 B CN 113225124B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18586—Arrangements for data transporting, e.g. for an end to end data transport or check
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Abstract
The invention discloses a method, a system, a device and a storage medium for establishing a satellite terminal end-to-end communication link, wherein the method comprises the steps that a calling satellite terminal sends a PDU Session establishment request to a 5G core network; the 5G core network establishes air interface resources for the calling satellite terminal and the called satellite terminal; an AMF network element in a 5G core network sends a PDU Session information modification request message to a space base station; the space base station modifies the request message according to the PDU Session information and identifies the message as an end-to-end communication service; the space base station establishes an end-to-end data transmission link and returns a response message; the 5G core network modifies the PDU Session information so that the PDU Session information contains a first identifier and a second identifier; the invention can ensure that the end-to-end user plane data of the satellite terminal does not need to be forwarded through a 5G core network, reduces the communication hop count of the user plane data and reduces the transmission delay of the network. The invention can be widely applied to the field of satellite mobile communication.
Description
Technical Field
The invention relates to the field of satellite mobile communication, in particular to a method, a system, a device and a storage medium for establishing an end-to-end communication link of a satellite terminal.
Background
The mobile broadband system supports two communication service modes, namely: a terminal-to-network communication service mode, a terminal-to-terminal communication service mode; in the end-network communication service mode, a user accesses the internet or other networks through a satellite terminal, a space segment system and a ground segment system; in the end-end communication service mode, a user directly interacts information with the space segment system through the satellite terminal, and information flow does not need to pass through the ground segment system. However, both communication service modes require ground segment system control, and the access authentication, connection management, mobility management and other processes all require ground segment equipment to participate.
Interpretation of terms:
GSE (GSE): packaging the general data stream;
5 GC: 5G Core Network (5G Core Network);
SMF: session Management Function (Session Management Function entity);
UPF: user Plane Function (User Plane functional entity);
AMF: access and Mobility Management Function (Access and Mobility Management Function);
IE: information element;
MAC 24: an integer of 24 bits (three field length);
SVN: a satellite virtual network number.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method, a system, a device and a storage medium for establishing an end-to-end communication link of a satellite terminal.
The technical scheme adopted by the invention is as follows:
in one aspect, an embodiment of the present invention includes a method for establishing an end-to-end communication link of a satellite terminal, including:
a calling satellite terminal sends a PDU Session establishment request to a 5G core network;
the 5G core network establishes air interface resources for the calling satellite terminal and the called satellite terminal;
the AMF network element in the 5G core network sends a PDU Session information modification request message to a space base station;
the space base station modifies the request message according to the PDU Session information and identifies the space base station as an end-to-end communication service;
the space base station establishes an end-to-end data transmission link and returns a response message to the 5G core network;
and the 5G core network modifies the PDU Session information so that the PDU Session information comprises a first identifier and a second identifier, wherein the first identifier is a GSE tunnel identifier MAC24 value of the calling satellite terminal, and the second identifier is a GSE tunnel identifier MAC24 value of the called satellite terminal.
Further, the step of establishing, by the 5G core network, air interface resources for the calling satellite terminal and the called satellite terminal includes:
the 5G core network informs a space base station to establish air interface resources for the calling satellite terminal according to a subscription strategy;
after the calling satellite terminal acquires the air interface resource, a dialing instruction and the number identification of the called satellite terminal are sent to the 5G core network through NAS information;
and the 5G core network establishes air interface resources for the called satellite terminal according to the dialing instruction and the number identification of the called satellite terminal.
Further, the step of establishing, by the 5G core network, an air interface resource for the called satellite terminal according to the dialing instruction and the number identifier of the called satellite terminal includes:
after receiving the dialing instruction, the 5G core network searches the context of the called satellite terminal according to the number identification of the called satellite terminal;
if the called satellite terminal is in an idle state, the 5G core network initiates a paging process, and establishes air interface resources after paging the called satellite terminal;
and if the called satellite terminal is in a connected state, the 5G core network establishes air interface resources for the called satellite terminal.
Further, the step of identifying, by the space base station, as an end-to-end communication service according to the PDU Session information modification request message includes:
detecting whether the PDU Session information modification request message contains first data, wherein the first data is UPP2PTNLinformation IE;
and if the PDU Session information modification request message contains the first data, identifying as an end-to-end communication service.
Further, the establishing, by the spatial base station, an end-to-end data transmission link specifically includes:
and the spatial base station establishes an end-to-end data transmission link by using the Information of the initiating source end and the target end contained in the UP P2P TNL Information.
Further, after the 5G core network modifies the PDU Session information, the method further includes:
the 5G core network sends a dialing completion signaling to the calling satellite terminal;
after receiving the dialing completion signaling, the calling satellite terminal sends the first identifier to a space base station;
and the space base station modifies the first identifier into a second identifier and then forwards the second identifier to the called satellite terminal.
On the other hand, the embodiment of the invention also includes a system for establishing the end-to-end communication link of the satellite terminal, which comprises:
the first sending module is used for sending a PDU Session establishment request to the 5G core network by the calling satellite terminal;
the establishing module is used for establishing air interface resources for the calling satellite terminal and the called satellite terminal by the 5G core network;
a second sending module, configured to send a PDU Session information modification request message to a spatial base station by an AMF network element in the 5G core network;
the identification module is used for identifying the space base station as an end-to-end communication service according to the PDU Session information modification request message;
the establishing and returning module is used for establishing an end-to-end data transmission link for the space base station and returning a response message to the 5G core network;
a modification module, configured to modify the PDU Session information by the 5G core network, so that the PDU Session message includes a first identifier and a second identifier, where the first identifier is a GSE tunnel identifier MAC24 value of the calling satellite terminal, and the second identifier is a GSE tunnel identifier MAC24 value of the called satellite terminal.
Further, the establishing module comprises:
the first establishing unit is used for informing the space base station of establishing air interface resources for the calling satellite terminal by the 5G core network according to a subscription strategy;
a sending unit, configured to send, after the calling satellite terminal acquires the air interface resource, a dialing instruction and a number identifier of the called satellite terminal to the 5G core network through an NAS message;
and the second establishing unit is used for establishing air interface resources for the called satellite terminal by the 5G core network according to the dialing instruction and the number identifier of the called satellite terminal.
On the other hand, the embodiment of the invention also includes a device for establishing the end-to-end communication link of the satellite terminal, which comprises:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is enabled to implement the method for establishing the peer-to-peer communication link of the satellite terminal.
In another aspect, the embodiment of the present invention further includes a computer-readable storage medium, on which a processor-executable program is stored, where the processor-executable program is used to implement the method for establishing a peer-to-peer communication link of a satellite terminal when being executed by a processor.
The invention has the beneficial effects that:
the invention sends PDU Session information modification request message to the space base station through AMF network element in 5G core network; the space base station modifies the request message according to the PDU Session information and identifies the message as an end-to-end communication service; then the space base station establishes an end-to-end data transmission link and returns a response message to the 5G core network; the 5G core network modifies the PDU Session information so that the PDU Session information contains a GSE tunnel identifier MAC24 value of the calling satellite terminal and a GSE tunnel identifier MAC24 value of the called satellite terminal, thereby enabling the end-to-end user plane data of the satellite terminal to be forwarded without passing through the 5G core network, reducing the communication hop count of the user plane data, realizing one-hop forwarding of the data and reducing the transmission delay of the network.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a mobile broadband communication service mode;
fig. 2 is a schematic diagram of end-to-end communication of a satellite terminal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an end-to-end service in which a satellite terminal resides in different satellites according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating steps of a method for establishing an end-to-end communication link of a satellite terminal according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an end-to-end call flow of a satellite terminal according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating an AMF network element sending a PDU Session information modification request message to a space base station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for establishing an end-to-end communication link of a satellite terminal according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The embodiments of the present application will be further explained with reference to the drawings.
Referring to fig. 1, the mobile broadband system supports two communication service modes, namely: end-to-network communication traffic patterns, end-to-end communication traffic patterns. In the end-network communication service mode, a user accesses the internet or other networks through a satellite terminal, a space segment system and a ground segment system; in the end-end communication service mode, a user directly interacts information with the space segment system through the satellite terminal, and information flow does not need to pass through the ground segment system. However, both communication service modes require ground segment system control, and the access authentication, connection management, mobility management and other processes all require ground segment equipment to participate.
Referring to fig. 2 and 3, two end-to-end communication modes of the satellite terminal are also included, one mode is that the satellite terminal shown in fig. 2 resides in the same satellite, and data interaction is performed through the same space base station end to end; alternatively, as shown in fig. 3, the satellite terminals reside in different satellites, and data interaction is performed end to end through different space base stations; the end-to-end communication of the two satellite terminals can be carried out data interaction only by forwarding through the 5GC core network, so that the transmission delay of the network is higher.
Based on this, referring to fig. 4, an embodiment of the present invention provides a method for establishing an end-to-end communication link of a satellite terminal, where the method is established by a 5G core network, and includes, but is not limited to the following steps:
s1, a calling satellite terminal sends a PDU Session establishment request to a 5G core network;
s2, the 5G core network establishes air interface resources for the calling satellite terminal and the called satellite terminal;
S3.5G, the AMF network element in the core network sends PDU Session information modification request message to the space base station;
s4, the space base station modifies the request message according to the PDU Session information and identifies the space base station as an end-to-end communication service;
s5, the space base station establishes an end-to-end data transmission link and returns a response message to the 5G core network;
s6, the 5G core network modifies the PDU Session information so that the PDU Session information contains a first identification and a second identification, wherein the first identification is a GSE tunnel identification MAC24 value of the calling satellite terminal, and the second identification is a GSE tunnel identification MAC24 value of the called satellite terminal.
Specifically, step S2, that is, the step of the 5G core network establishing air interface resources for the calling satellite terminal and the called satellite terminal, includes:
s201, the 5G core network informs a space base station to establish air interface resources for the calling satellite terminal according to a subscription strategy;
s202, after the calling satellite terminal acquires the air interface resource, a dialing instruction and the number identification of the called satellite terminal are sent to the 5G core network through NAS information;
and S203, the 5G core network establishes air interface resources for the called satellite terminal according to the dialing instruction and the number identification of the called satellite terminal.
Specifically, step S203 is that the step of the 5G core network establishing an air interface resource for the called satellite terminal according to the dialing instruction and the number identifier of the called satellite terminal, and includes:
s203-1, after receiving the dialing instruction, the 5G core network searches the context of the called satellite terminal according to the number identification of the called satellite terminal;
s203-2, if the called satellite terminal is in an idle state, the 5G core network initiates a paging process, and establishes air interface resources after the called satellite terminal is paged;
and S203-3, if the called satellite terminal is in a connection state, the 5G core network establishes air interface resources for the called satellite terminal.
Specifically, step S4, that is, the step of identifying, by the space base station, as the end-to-end communication service according to the PDU Session information modification request message, includes:
s401, detecting whether the PDU Session information modification request message contains first data, wherein the first data is UPP2PTNLinformation IE;
s402, if the PDU Session information modification request message contains the first data, identifying the PDU Session information modification request message as an end-to-end communication service.
Specifically, in step S5, that is, the establishing of the end-to-end data transmission link by the space base station is specifically:
and the spatial base station establishes an end-to-end data transmission link by using the Information of the initiating source end and the target end contained in the UP P2P TNL Information.
Specifically, after step S6, that is, after the 5G core network modifies the PDU Session information, the method further includes:
s7, the 5G core network sends a dialing completion signaling to the calling satellite terminal;
s8, after receiving the dialing completion signaling, the calling satellite terminal sends the first identifier to a space base station;
and S9, the space base station modifies the first identifier into a second identifier and then forwards the second identifier to the called satellite terminal.
In this embodiment, referring to fig. 5, a method for establishing an end-to-end communication link of a satellite terminal according to this embodiment is further specifically described:
in fig. 5, end-to-end communication is established between a calling satellite terminal and a called satellite terminal, and first, the calling satellite terminal and the called satellite terminal need to be normally registered in a 5G core network; then the following flow is executed:
(1) a calling satellite terminal initiates a PDU Session establishment request to a 5G core network;
(2) the 5G core network informs the calling space base station to establish air interface resources for the calling satellite terminal according to the signed strategy;
(3) after acquiring the air interface resources, the calling satellite terminal initiates a dialing process, and sends a dialing instruction and the number identification MSISDN of the called satellite terminal to a 5G core network by using NAS information;
(4) after receiving a dialing instruction of a calling satellite terminal, the 5G core network searches the context of a called satellite terminal according to the number identifier, and if the called satellite terminal is in an idle state at the moment, the 5G core network initiates a paging process to page the called satellite terminal and establishes an air interface resource for the called satellite terminal; if the called satellite terminal is in a connected state at the moment, air interface resources are directly established for the called satellite terminal;
(5) after the above procedures are completed, the 5G core network modifies PDU Session information of the space base station, so that the PDU Session of the space base station simultaneously records the GSE tunnel identifier MAC24 value of the calling satellite terminal and the GSE tunnel identifier MAC24 value of the called satellite terminal, and simultaneously informs the calling and called satellite terminals of completion of dialing;
(6) after receiving the dialing completion signaling, the calling satellite terminal can start forwarding the data plane; the calling satellite sends data to the space base station, and the GSE tunnel number identification still adopts the MAC24 value distributed by the space base station to the satellite terminal;
(7) and after receiving the GSE tunnel data of the calling satellite terminal, the space base station changes the value of the GSE tunnel identifier MAC24 to be the value of the MAC24 of the called satellite terminal according to the PDU Session information and forwards the GSE tunnel identifier MAC 3578 to the called satellite terminal.
Referring to fig. 6, in this embodiment, after air interface resources of the calling satellite terminal and the called satellite terminal are both established, GSE tunnel identifier MAC24 values of the calling satellite terminal and the called satellite terminal need to be exchanged, and the exchange of the calling and called user interface endpoint identifiers is implemented by extending a PDU Session information modification process in this embodiment. That is, as shown in fig. 6, an AMF network element in a 5G core network sends a PDU Session Information modification Request message to a spatial base station, where if an IE of UP P2P TNL Information designed specifically for end-to-end communication is included in a PDU Session Resource modification Request Transfer in the PDU Session Information modification Request message, it indicates that current message transmission belongs to an end-to-end data transmission process, after receiving the PDU Session Information modification Request message, the spatial base station establishes an end-to-end data transmission link using Information of an originating end and a target end included in the UP P2P TNL Information, and after the end-to-end data link is successfully established, returns a PDU Session Resource modification response message to notify the 5G core network, and the end-to-end data link is successfully established.
In this embodiment, the UP P2P TNL Information IE is specially designed for the 5G core network, and includes end-to-end user plane data channel Information data of the satellite terminal, and the data structure thereof is shown in table 1:
TABLE 1 UP P2P TNL Information IE data Structure Table
| IE | Properties | Description of the invention |
| UP P2P TNL Information | Point-to-point user plane data channel establishment | |
| >Source UP TNL Information | M (optional) | Originating end user plane information |
| >>GSE tunnel | M (optional) | GSE tunnel |
| >>>MAC24Address | M (optional) | MAC24 address |
| >>>SVN | M (optional) | SVN |
| >>IP Address | M (optional) | Base station IP address |
| >>Target UP TNL Information | M (optional) | Receiving end user plane information |
| >>>GSE tunnel | M (optional) | GSE tunnel |
| >>>MAC24Address | M (optional) | MAC24 address |
| >>>SVN | M (optional) | SVN |
| >>IP Address | M (optional) | Base station IP address |
The method for establishing the end-to-end communication link of the satellite terminal has the following technical effects:
the embodiment of the invention transmits PDU Session information modification request message to the space base station through the AMF network element in the 5G core network; the space base station modifies the request message according to the PDU Session information and identifies the message as an end-to-end communication service; then the space base station establishes an end-to-end data transmission link and returns a response message; and the 5G core network modifies the PDU Session information so that the PDU Session information contains a GSE tunnel identifier MAC24 value of the calling satellite terminal and a GSE tunnel identifier MAC24 value of the called satellite terminal, thereby enabling the end-to-end user plane data of the satellite terminal to be forwarded without passing through the 5G core network, reducing the communication hop count of the user plane data, realizing one-hop forwarding of the data and reducing the transmission delay of the network.
The embodiment of the invention also provides a system for establishing the end-to-end communication link of the satellite terminal, which comprises the following steps:
the first sending module is used for sending a PDU Session establishment request to the 5G core network by the calling satellite terminal;
the establishing module is used for establishing air interface resources for the calling satellite terminal and the called satellite terminal by the 5G core network;
a second sending module, configured to send a PDU Session information modification request message to a spatial base station by an AMF network element in the 5G core network;
the identification module is used for identifying the space base station as an end-to-end communication service according to the PDU Session information modification request message;
the establishing and returning module is used for establishing an end-to-end data transmission link and returning a response message by the space base station;
a modification module, configured to modify the PDU Session information by the 5G core network, so that the PDU Session message includes a first identifier and a second identifier, where the first identifier is a GSE tunnel identifier MAC24 value of the calling satellite terminal, and the second identifier is a GSE tunnel identifier MAC24 value of the called satellite terminal.
Specifically, the establishing module includes:
the first establishing unit is used for informing the space base station of establishing air interface resources for the calling satellite terminal by the 5G core network according to a subscription strategy;
a sending unit, configured to send, after the calling satellite terminal acquires the air interface resource, a dialing instruction and a number identifier of the called satellite terminal to the 5G core network through an NAS message;
and the second establishing unit is used for establishing air interface resources for the called satellite terminal by the 5G core network according to the dialing instruction and the number identifier of the called satellite terminal.
The contents in the method embodiment shown in fig. 4 are all applicable to the embodiment of the present system, the functions implemented in the embodiment of the present system are the same as the method embodiment shown in fig. 4, and the advantageous effects achieved by the embodiment of the present system are also the same as the advantageous effects achieved by the method embodiment shown in fig. 4.
Referring to fig. 7, an embodiment of the present invention further provides a communication apparatus 200 for a low earth orbit satellite and a 5G core network, which specifically includes:
at least one processor 210;
at least one memory 220 for storing at least one program;
when executed by the at least one processor 210, causes the at least one processor 210 to implement the method as shown in fig. 4.
The memory 220, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs and non-transitory computer-executable programs. The memory 220 may include high speed random access memory and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 220 may optionally include remote memory located remotely from processor 210, and such remote memory may be connected to processor 210 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It will be understood that the device structure shown in fig. 7 does not constitute a limitation of device 200, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
In the apparatus 200 shown in fig. 7, the processor 210 may retrieve the program stored in the memory 220 and execute, but is not limited to, the steps of the embodiment shown in fig. 4.
The above-described embodiments of the apparatus 200 are merely illustrative, and the units illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purposes of the embodiments.
Embodiments of the present invention also provide a computer-readable storage medium, which stores a program executable by a processor, and the program executable by the processor is used for implementing the method shown in fig. 4 when being executed by the processor.
The embodiment of the application also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and executed by the processor to cause the computer device to perform the method illustrated in fig. 4.
It will be understood that all or some of the steps, systems of methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A method for establishing an end-to-end communication link of a satellite terminal is characterized by comprising the following steps:
a calling satellite terminal sends a PDU Session establishment request to a 5G core network;
the 5G core network establishes air interface resources for the calling satellite terminal and the called satellite terminal;
the AMF network element in the 5G core network sends a PDU Session information modification request message to a space base station;
the space base station modifies the request message according to the PDU Session information and identifies the space base station as an end-to-end communication service;
the space base station establishes an end-to-end data transmission link and returns a response message to the 5G core network;
and the 5G core network modifies the PDU Session information so that the PDU Session information comprises a first identifier and a second identifier, wherein the first identifier is a GSE tunnel identifier MAC24 value of the calling satellite terminal, and the second identifier is a GSE tunnel identifier MAC24 value of the called satellite terminal.
2. The method according to claim 1, wherein the step of establishing air interface resources for the calling satellite terminal and the called satellite terminal by the 5G core network comprises:
the 5G core network informs a space base station to establish air interface resources for the calling satellite terminal according to a subscription strategy;
after the calling satellite terminal acquires the air interface resource, a dialing instruction and the number identification of the called satellite terminal are sent to the 5G core network through NAS information;
and the 5G core network establishes air interface resources for the called satellite terminal according to the dialing instruction and the number identification of the called satellite terminal.
3. The method according to claim 2, wherein the step of establishing, by the 5G core network, an air interface resource for the called satellite terminal according to the dialing instruction and the number identifier of the called satellite terminal includes:
after receiving the dialing instruction, the 5G core network searches the context of the called satellite terminal according to the number identification of the called satellite terminal;
if the called satellite terminal is in an idle state, the 5G core network initiates a paging process, and establishes air interface resources after paging the called satellite terminal;
and if the called satellite terminal is in a connected state, the 5G core network establishes air interface resources for the called satellite terminal.
4. The method for establishing a peer-to-peer communication link of a satellite terminal according to claim 1, wherein the step of identifying as a peer-to-peer communication service by the space base station according to the PDU Session information modification request message comprises:
detecting whether the PDU Session information modification request message contains first data, wherein the first data is UPP2PTNLinformation IE;
and if the PDU Session information modification request message contains the first data, identifying as an end-to-end communication service.
5. The method for establishing an end-to-end communication link of a satellite terminal according to claim 4, wherein the step of establishing an end-to-end data transmission link by the space base station specifically includes:
and the spatial base station establishes an end-to-end data transmission link by using the Information of the initiating source end and the target end contained in the UP P2P TNL Information.
6. The method for establishing a peer-to-peer communication link of a satellite terminal according to claim 1, wherein after the PDU Session information is modified by the 5G core network, the method further comprises:
the 5G core network sends a dialing completion signaling to the calling satellite terminal;
after receiving the dialing completion signaling, the calling satellite terminal sends the first identifier to a space base station;
and the space base station modifies the first identifier into a second identifier and then forwards the second identifier to the called satellite terminal.
7. A system for establishing an end-to-end communication link with a satellite terminal, comprising:
the first sending module is used for sending a PDU Session establishment request to the 5G core network by the calling satellite terminal;
the establishing module is used for establishing air interface resources for the calling satellite terminal and the called satellite terminal by the 5G core network;
a second sending module, configured to send a PDU Session information modification request message to a spatial base station by an AMF network element in the 5G core network;
the identification module is used for identifying the space base station as an end-to-end communication service according to the PDU Session information modification request message;
the establishing and returning module is used for establishing an end-to-end data transmission link for the space base station and returning a response message to the 5G core network;
a modification module, configured to modify the PDU Session information by the 5G core network, so that the PDU Session message includes a first identifier and a second identifier, where the first identifier is a GSE tunnel identifier MAC24 value of the calling satellite terminal, and the second identifier is a GSE tunnel identifier MAC24 value of the called satellite terminal.
8. The system for establishing a peer-to-peer communication link of a satellite terminal according to claim 7, wherein said establishing module comprises:
the first establishing unit is used for informing the space base station of establishing air interface resources for the calling satellite terminal by the 5G core network according to a subscription strategy;
a sending unit, configured to send, after the calling satellite terminal acquires the air interface resource, a dialing instruction and a number identifier of the called satellite terminal to the 5G core network through an NAS message;
and the second establishing unit is used for establishing air interface resources for the called satellite terminal by the 5G core network according to the dialing instruction and the number identifier of the called satellite terminal.
9. An apparatus for establishing an end-to-end communication link of a satellite terminal, comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method of any one of claims 1-6.
10. Computer-readable storage medium, characterized in that a program executable by a processor is stored thereon, which program, when being executed by the processor, is adapted to carry out the method according to any one of claims 1-6.
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| WO2023019506A1 (en) * | 2021-08-19 | 2023-02-23 | 海能达通信股份有限公司 | Method and device for end-to-end communication, and system |
| WO2023019503A1 (en) * | 2021-08-19 | 2023-02-23 | 海能达通信股份有限公司 | End-to-end communication method and system, and ground gateway station and satellite-borne upf |
| CN115915072B (en) * | 2021-08-26 | 2024-07-16 | 大唐移动通信设备有限公司 | End-to-end PDU session management method, device and network equipment |
| CN115842578A (en) * | 2021-09-18 | 2023-03-24 | 华为技术有限公司 | Communication method and device |
| CN113852408B (en) * | 2021-09-26 | 2024-04-30 | 中国电子科技集团公司第五十四研究所 | Low-orbit satellite mobile communication system for realizing TtT communication mode and realization method |
| CN113727431B (en) * | 2021-09-28 | 2022-05-24 | 广州爱浦路网络技术有限公司 | Satellite data link establishing method, device and storage medium based on core network |
| CN114039648B (en) * | 2021-10-29 | 2023-03-31 | 北京邮电大学 | Coverage extension method and device for satellite network |
| CN114401034B (en) * | 2022-01-14 | 2022-10-21 | 广州爱浦路网络技术有限公司 | One-to-many end-to-end communication method and hang-up method in heaven and earth integration |
| CN114785399B (en) * | 2022-03-22 | 2024-03-29 | 南京熊猫汉达科技有限公司 | End-to-end communication method of low-orbit satellite communication network system |
| CN116866939A (en) * | 2022-03-27 | 2023-10-10 | 华为技术有限公司 | Communication method and device |
| CN116939001A (en) * | 2022-04-08 | 2023-10-24 | ***通信集团设计院有限公司 | Point-to-point communication service processing method, system, equipment and storage medium |
| CN115209446B (en) * | 2022-06-13 | 2023-07-25 | 爱浦路网络技术(北京)有限公司 | Core network cloud service communication method, system, device and medium based on satellite |
| CN114978293B (en) * | 2022-06-27 | 2023-01-20 | 广州爱浦路网络技术有限公司 | Method, system, apparatus and storage medium for terrestrial terminal and satellite communication |
| CN115460606B (en) * | 2022-11-10 | 2023-03-24 | 之江实验室 | Method and device for enhancing security of control plane based on 5G core network |
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| CN111182572B (en) * | 2017-10-20 | 2021-03-05 | Oppo广东移动通信有限公司 | Method for transmitting data, terminal equipment and network equipment |
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