CN115694600B - Associated registration method and associated registration system of satellite terminal - Google Patents
Associated registration method and associated registration system of satellite terminal Download PDFInfo
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- CN115694600B CN115694600B CN202211142022.2A CN202211142022A CN115694600B CN 115694600 B CN115694600 B CN 115694600B CN 202211142022 A CN202211142022 A CN 202211142022A CN 115694600 B CN115694600 B CN 115694600B
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Abstract
The invention discloses an associated registration method and an associated registration system of a satellite terminal, wherein the associated registration method and the associated registration system comprise the steps that a gateway system broadcasts control signaling containing IP domain resources to the satellite terminal through a satellite; the satellite terminal generates an IP address according to the satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or generates an interface number according to the satellite terminal electronic sequence number and combines the interface number with an IP gateway service prefix contained in the IP domain resource to generate the IP address; the satellite terminal sends an associated registration request to the gateway system through a satellite according to the generated IP address; and the gateway system performs associated registration according to the associated registration request. The invention realizes the associated registration of the satellite terminal through one RTT message Wen Jiaohu quickly and efficiently.
Description
Technical Field
The invention relates to the technical field of satellite communication. And more particularly, to an associated registration method and an associated registration system for a satellite terminal.
Background
The satellite network system consists of a ground section gateway system (comprising an IP gateway and a forward and reverse link gateway), a space section satellite or satellite constellation and a user section satellite terminal. The satellite terminal is accessed to the gateway system through a satellite or a satellite constellation and then connected with the core network. The communication data is transmitted based on an IP protocol, the satellite terminal needs an effective IP address to communicate with the gateway system, and the problem of IP address configuration of the satellite terminal needs to be solved. Meanwhile, the satellite terminal needs to be associated with the satellite, the IP gateway and the link gateway, so that a forward link path from the IP gateway to the satellite terminal and a reverse link path from the satellite terminal to the IP gateway are determined, and interconnection and intercommunication between the satellite terminal and the core network are realized.
Traditional satellite networks employ three IP addressing modes: the satellite terminal static configuration (configuration when the satellite terminal is connected to the network) and the gateway dynamic allocation (provided by the satellite terminal registration reply message) are distributed with the DHCP (obtained through the interaction of the DHCP message after the two-way link is communicated).
IPv6 provides a standard stateless address automatic configuration mode, and can rapidly configure the IP address of the satellite terminal. The invention broadcasts standard RA messages such as IPv6 prefix and the like in the forward data stream through the resource broadcast signaling, and the satellite terminal can rapidly and automatically configure own IP address. After the satellite terminal is configured with the IP address, the satellite terminal registers with the IP gateway through a user association request together with the associated forward and reverse link gateway serial number ID, and the IP gateway can manage the IP address allocated by the satellite terminal by adopting a stateful mode; the message interaction of one RTT solves the problems of IP addressing, association and satellite terminal registration, and the solution is simple and efficient.
Disclosure of Invention
An object of the present invention is to provide an associated registration method of a satellite terminal, including:
the gateway system broadcasts control signaling containing IP domain resources to the satellite terminal through the satellite;
the satellite terminal generates an IP address according to the satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or generates an interface number according to the satellite terminal electronic sequence number and combines the interface number with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal sends an associated registration request to the gateway system through a satellite according to the generated IP address;
and the gateway system performs associated registration according to the associated registration request.
Preferably, the association registration request includes a satellite terminal system allocation sequence number, a satellite terminal electronic sequence number, a link gateway number, an IP gateway number, a satellite number, and an IP address of the satellite terminal.
Preferably, the registering of the gateway system in the IP gateway of the gateway system according to the association registration request includes: and the IP gateway of the gateway system associates the IP address in the associated registration request with the satellite terminal system distribution serial number or the satellite terminal electronic serial number in the associated registration request, and completes registration.
Preferably, the interface number is a 64-bit interface number, and the IP address of the satellite terminal is a 128-bit IPv6 address.
Preferably, the gateway system periodically broadcasts signaling containing link resources and IP domain resources.
Preferably, the method further comprises: when switching the link gateway, the IP gateway of the gateway system updates the serial number of the associated link gateway and keeps the IP address of the satellite terminal unchanged.
Preferably, the method further comprises: when the IP gateway is switched, the switched IP gateway of the gateway system broadcasts updated signaling containing IP domain resources to the satellite terminal through the satellite; the satellite terminal generates an interface number according to the satellite terminal electronic serial number, and combines the interface number with an IP gateway service prefix contained in the IP domain resource in the updated signaling to generate an updated IP address; the satellite terminal sends a new association registration request to the gateway system through a satellite according to the updated IP address; the gateway system performs the associated registration according to the new associated registration request.
Preferably, the method further comprises: and responding to the closing operation, sending a de-association request to the gateway system before closing by the satellite terminal which completes the registration, and disconnecting the association registration with the satellite terminal by the gateway system according to the de-association request.
Preferably, the method further comprises: the gateway system checks the state of the registered satellite terminal through heartbeat to judge whether to disconnect the associated registration with the satellite terminal.
Another object of the present invention is to provide an associated registration system of a satellite terminal, including a satellite terminal, a satellite and a gateway system;
the gateway system is used for broadcasting signaling to the satellite terminal through the satellite, wherein the signaling comprises link resources and IP domain resources;
the satellite terminal is used for generating an IP address according to a satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or is used for generating an interface number according to a satellite terminal electronic sequence number and combining with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal is further used for sending an associated registration request to the gateway system through the satellite according to the generated IP address;
the gateway system is also used for carrying out association registration according to the association registration request.
The beneficial effects of the invention are as follows:
the method for registering the satellite terminal ensures the uniqueness of the generated IP address, omits DAD inspection, accelerates the process of IP addressing, and rapidly and efficiently realizes the associated registration of the satellite terminal through one RTT message Wen Jiaohu.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Fig. 1 shows a flowchart of a registration method of a satellite terminal according to the present invention.
Fig. 2 shows a transparent star pattern connection topology according to the invention.
Fig. 3 shows a regenerated star pattern connection topology according to the present invention.
Fig. 4 shows a schematic diagram of IP addressing and associated registration of a satellite terminal according to the present invention.
Fig. 5 shows a schematic diagram of a satellite terminal modified link gateway association according to the present invention.
Fig. 6 shows a schematic diagram of satellite terminal modification IP gateway association according to the present invention.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to the preferred embodiments and the accompanying fig. 1 to 6. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
The invention aims to provide an associated registration method of a satellite terminal, which comprises the following steps:
the gateway system broadcasts control signaling containing IP domain resources to the satellite terminal through the satellite;
the satellite terminal generates an IP address according to the satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or generates an interface number according to the satellite terminal electronic sequence number and combines the interface number with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal sends an associated registration request to the gateway system through a satellite according to the generated IP address;
and the gateway system performs associated registration according to the associated registration request.
The registration method of the satellite terminal comprises two modes of configuration of IP addresses:
static configuration IP address:
the gateway system periodically broadcasts an allocation mapping table of the allocation sequence number SAI (SystemAssignedID) and the IP address of the satellite terminal system to the satellite terminal through the satellite, and the satellite terminal generates the IP address according to the allocation mapping table of the allocation sequence number of the satellite terminal system and the IP address contained in the IP domain resource.
Stateless auto-configuration IP address:
the gateway system broadcasts signaling to the satellite terminal through the satellite, the signaling comprises link resources and IP domain resources, the satellite terminal generates an IP address according to the combination of the electronic serial number of the satellite terminal and IP gateway service prefix contained in the IP domain resources, the satellite terminal generates 64-bit interface number InterfaceID through an algorithm by using 32-bit ESN of the satellite terminal, and the 64-bit automatically generated address is added with the 64-bit IP address prefix broadcasted by the gateway system to form the 128-bit IPv6 address of the satellite terminal.
Whether the IP address is statically configured or stateless automatically configured, the IP address needs to be reported to an IP gateway accessed by the satellite terminal when the user registers. The IP gateway associates the IP address with the satellite terminal's ESN/SAI for subsequent auditing, authorization, billing and management.
In one embodiment, as shown in figure 4,
the IP gateway in the gateway system announces own IP domain resources and resource use conditions to a link gateway in the gateway system, the link gateway unifies own link resources and use conditions to be broadcasted to a satellite terminal through a satellite together with the IP domain resources, the satellite terminal selects the IP gateway according to received broadcast signaling, an SLAAC (stateless address automatic configuration) mode is used, an IP address is generated by utilizing the prefix of the selected IP gateway, an air interface IP address is configured, after IP addressing, the satellite terminal immediately starts an associated registration process, and the satellite terminal sends an associated registration request to the IP gateway, wherein the request message comprises a user system number SAI, a satellite terminal electronic serial number ESN, a serial number of the link gateway MCS/RCM, an IP gateway serial number, a forwarding star number and an IP address of an air interface of the satellite terminal. The IP gateway processes the association registration request and sends an association confirmation to the satellite terminal. The association confirmation contains proxy prefix information which can allocate addresses to the LAN port cascade users by the satellite terminal.
And after receiving the association confirmation, the satellite terminal receives the proxy prefix information at the same time under the condition of no error. The satellite terminal configures the IP address of the LAN port according to the algorithm, broadcasts the proxy prefix information on the LAN port, and configures the IP address of the cascade user of the LAN port.
The DAD check is needed before the IP address takes effect, but the uniqueness of the stateless address automatic configuration and the ESN of the satellite terminal used ensures the uniqueness of the automatic generation address and omits the DAD check.
In one embodiment, as shown in figure 5,
when the satellite terminal registers, the link gateway and the IP gateway are already selected and associated registration is carried out. While the satellite terminal is associated with the current gateway system and provides services, the link resource information and the IP domain information broadcast by all the IP gateways and the link gateway are still continuously received.
The satellite terminal judges whether the link gateway needs to be switched or not according to the algorithm and selects a new link gateway. When the link gateway is switched, the satellite terminal sends a modification association request to the IP gateway through the satellite, wherein the request comprises a satellite terminal system allocation serial number SAI, a satellite terminal electronic serial number ESN, a new link gateway MCS/RCM number, an IP gateway number, a satellite number and an IP address of an air interface of the satellite terminal, and the IP gateway processes the modification association request and sends association confirmation to the satellite terminal. The associated link gateway number is updated.
In one embodiment, as shown in figure 6,
when the satellite terminal is registered, the link gateway and the IP gateway are selected and associated and registered, and the link resource information and the IP domain information broadcast by all the IP gateways and the link gateway are continuously received while the satellite terminal is associated with the current gateway system and provides services.
The satellite terminal judges whether to switch the IP gateway or not and selects a new IP gateway according to the algorithm, and reconfigures the IP address when the IP gateway is switched.
The satellite terminal uses the original IP address to cancel the association request to the original IP gateway, then the updated IP gateway broadcasts updated IP domain resource signaling to the satellite terminal through the satellite, the satellite terminal generates an interface number according to the electronic serial number of the satellite terminal after receiving the signaling, and combines the interface number with the updated IP gateway service prefix contained in the IP domain resource to generate an updated IP address, the satellite terminal sends an association registration request to the gateway system through the satellite according to the generated updated IP address, and the gateway system carries out association registration according to the association registration request. The association confirmation contains new agent prefix information which can allocate addresses to the LAN port cascade users by the satellite terminal.
The request message comprises a satellite terminal system allocation serial number SAI, a satellite terminal electronic serial number ESN, a serial number of a link gateway MCS/RCM, an updated IP gateway serial number, a satellite serial number and an updated satellite terminal IP address.
And after receiving the association confirmation, the satellite terminal receives the new agent prefix information at the same time under the condition of no error. The satellite terminal configures the IP address of the LAN port according to the algorithm, broadcasts the new prefix information on the LAN port, and configures the IP address of the cascade user of the LAN port.
Thus, the user associated information is updated to be a new IP gateway, a new IP address is configured for the air interface, and the new IP address is allocated for the cascade user of the LAN interface.
The invention aims to provide an associated registration system of a satellite terminal, which comprises the satellite terminal UT (UserTerminal), a satellite and a gateway system,
the gateway system includes an IP gateway IPGW (IPGateway) and a link gateway, satellite terminals, satellite networks,
the link gateway LinkGateway includes a forward link gateway MCS (MODCODServicingSystem) and a reverse link gateway RCM (ReturnChannelManager).
Wherein the physical layer satellite modem SM (SatelliteModem) is embedded in the UT, MCS/RCM or OBP.
The gateway system is used for broadcasting signaling to the satellite terminal through the satellite, wherein the signaling comprises link resources and IP domain resources;
the satellite terminal is used for generating an IP address according to a satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or is used for generating an interface number according to a satellite terminal electronic sequence number and combining with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal is further used for sending an associated registration request to the gateway system through the satellite according to the generated IP address;
the gateway system is also used for carrying out association registration according to the association registration request.
The registration system operation mode includes: transparent star mode and regenerated star mode
Transparent star mode as shown in fig. 2, satellites are used for information transfer
The regenerated satellite mode is shown in fig. 3, and the satellite comprises an on-board processing unit (OBP), extracts communication information, and sequentially demodulates, decodes, switches routes, codes and modulates and retransmits the communication information.
When the satellite works in the transparent mode, the satellite terminal and the link gateway are in the same physical connection, and after the physical channels are synchronized, the satellite terminal can receive the broadcast signaling sent by the link gateway and can use the random access channel to send reverse signaling.
When the satellite works in the regeneration and forwarding mode, the satellite terminal and a link gateway of the OBP running on the satellite processing unit are in the same physical connection, and after the physical channels are synchronized, the satellite terminal can receive the broadcast signaling sent by the satellite-borne link gateway and can use the random access channel to send reverse signaling.
In transparent star mode, the link gateway operates on the ground segment, while in regenerative star mode, the link gateway operates on an on-board processing unit on the satellite.
Table 1 IP address prefix broadcast content
Table 2 satellite terminal performs association application content
Table 3 IP gateway validates association request content
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (8)
1. An associated registration method of a satellite terminal, comprising:
the gateway system broadcasts control signaling containing IP domain resources to the satellite terminal through the satellite;
the satellite terminal generates an IP address according to the satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or generates an interface number according to the satellite terminal electronic sequence number and combines the interface number with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal sends an associated registration request to the gateway system through a satellite according to the generated IP address;
the gateway system carries out association registration according to the association registration request;
the associated registration request comprises a satellite terminal system allocation serial number, a satellite terminal electronic serial number, a link gateway number, an IP gateway number, a satellite number and an IP address of a satellite terminal;
the gateway system registering in the IP gateway of the gateway system according to the associated registration request comprises: and the IP gateway of the gateway system associates the IP address in the associated registration request with the satellite terminal system distribution serial number or the satellite terminal electronic serial number in the associated registration request, and completes registration.
2. The associated registration method of a satellite terminal according to claim 1, wherein the interface number is a 64-bit interface number and the IP address of the satellite terminal is a 128-bit IPv6 address.
3. The associated registration method of a satellite terminal according to claim 1, comprising: the gateway system periodically broadcasts signaling containing link resources and IP domain resources.
4. A method for associated registration of a satellite terminal according to claim 3, the method further comprising: when switching the link gateway, the IP gateway of the gateway system updates the serial number of the associated link gateway, and the IP address of the satellite terminal is kept unchanged.
5. A method for associated registration of a satellite terminal according to claim 3, the method further comprising: when the IP gateway is switched, the switched IP gateway of the gateway system broadcasts updated signaling containing IP domain resources to the satellite terminal through the satellite; the satellite terminal generates an interface number according to the satellite terminal electronic serial number, and combines the interface number with an IP gateway service prefix contained in the IP domain resource in the updated signaling to generate an updated IP address; the satellite terminal sends a new association registration request to the gateway system through a satellite according to the updated IP address; the gateway system performs the associated registration according to the new associated registration request.
6. The associated registration method of a satellite terminal according to claim 1, wherein the method further comprises: and responding to the closing operation, sending a de-association request to the gateway system before closing by the satellite terminal which completes the registration, and disconnecting the association registration with the satellite terminal by the gateway system according to the de-association request.
7. The associated registration method of a satellite terminal according to claim 1, wherein the method further comprises: the gateway system checks the state of the registered satellite terminal through heartbeat to judge whether to disconnect the associated registration with the satellite terminal.
8. The associated registration system of the satellite terminal is characterized by comprising the satellite terminal, a satellite and a gateway system;
the gateway system is used for broadcasting signaling to the satellite terminal through the satellite, wherein the signaling comprises link resources and IP domain resources;
the satellite terminal is used for generating an IP address according to a satellite terminal system allocation sequence number and an allocation mapping table of the IP address contained in the IP domain resource, or is used for generating an interface number according to a satellite terminal electronic sequence number and combining with an IP gateway service prefix contained in the IP domain resource to generate the IP address;
the satellite terminal is further used for sending an associated registration request to the gateway system through the satellite according to the generated IP address;
the gateway system is also used for carrying out association registration according to the association registration request;
the associated registration request comprises a satellite terminal system allocation serial number, a satellite terminal electronic serial number, a link gateway number, an IP gateway number, a satellite number and an IP address of a satellite terminal;
the gateway system registering in the IP gateway of the gateway system according to the associated registration request comprises: and the IP gateway of the gateway system associates the IP address in the associated registration request with the satellite terminal system distribution serial number or the satellite terminal electronic serial number in the associated registration request, and completes registration.
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