CN115426034A - Satellite network networking method based on label routing - Google Patents
Satellite network networking method based on label routing Download PDFInfo
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- CN115426034A CN115426034A CN202211372960.1A CN202211372960A CN115426034A CN 115426034 A CN115426034 A CN 115426034A CN 202211372960 A CN202211372960 A CN 202211372960A CN 115426034 A CN115426034 A CN 115426034A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
Abstract
The invention discloses a satellite network networking method based on label routing, and belongs to the field of heaven and earth integrated network communication. In the invention, the satellite terminals mutually learn the mapping relation between the user addressing identification and the satellite label, the satellite label is packaged for the user data according to the target user addressing identification, and the user data is routed and forwarded on the satellite and among the satellites by adopting the satellite label, thereby reducing the protocol processing burden and the forwarding complexity on the satellite. The method simplifies the route forwarding function of the satellite in the satellite network, is convenient for the satellite to realize large-capacity exchange, and supports the multi-protocol unified bearing of large-scale satellite user networking and user data.
Description
Technical Field
The invention relates to the technical field of heaven and earth integrated network communication, in particular to a method for networking communication based on label routing in a satellite network.
Background
The space-ground integrated network is an information network consisting of satellites, constellations and corresponding ground infrastructures with different orbits, types and characteristics, which are connected together through inter-satellite and satellite-ground links, and can be divided into a satellite network, a space-based access network and a ground node network according to different functions of satellite nodes. The satellite network is mainly deployed in a layered mode by adopting multifunctional satellites or ground gateway stations distributed on different orbital planes of high, medium and low orbits and the like, global seamless coverage is achieved, the satellite network is mainly used for extension and expansion of the ground network, and functions of flow sharing, communication guarantee in a hostile environment, global communication transmission and the like can be provided for the ground network.
There are two kinds of design ideas of routing and networking in the satellite network, one is to adopt the same standard IP routing system as the ground network, and the other is to adopt a special routing system. The first idea can realize the fusion of the satellite network and the ground network more easily and realize a uniform route switching architecture, the idea adopts the same route protocol with the ground, and a ground system is carried according to the route protocol without considering the node, link and topological characteristics of the satellite network, so the first idea can be seamlessly fused with the ground network, but cannot be better applied to the satellite network. The dedicated routing system in the second concept is tailored to the network characteristics of the satellite network, so that the capability and efficiency of the satellite network can be improved under the same conditions.
The method adopts a standard IP routing protocol mode in the satellite network, follows the ground system, and does not consider the node, link and topological characteristics of the satellite network, so the method can be seamlessly fused with the ground network, but cannot be better applied to the satellite network, and cannot realize optimization in networking aspects such as expansibility, safety, mobility, operation configuration, system overhead and the like.
Disclosure of Invention
The invention provides a satellite network networking method based on label routing, which can realize the route learning and interaction of a large-scale satellite terminal in a satellite network, realize the route exchange and the bearing transmission of user data in the satellite network and solve the problem that the on-satellite processing capability cannot support the networking application of a large-scale satellite user under the constraint of 'weak space and strong ground' of the processing capability of a satellite network node.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a satellite network networking method based on label routing comprises the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by the satellite side into an identification label mapping message, and the identification label mapping message is sent to all other satellite terminals in the satellite network through an inter-satellite network;
and S2, after receiving the identification label mapping message, other satellite terminals analyze and store the user addressing identification carried in the identification label mapping message and the mapping information of the satellite label.
Further, step S2 is followed by:
s3, when a user network at a user side of the satellite terminal is communicated with user networks at user sides of other satellite terminals, firstly, data are sent to the connected satellite terminal, the connected satellite terminal searches the learned user addressing identification and the mapping information of the satellite label according to the user addressing identification at the user side of the target satellite terminal carried in the sent data, the target satellite label corresponding to the searched user addressing identification at the user side of the target satellite terminal is encapsulated in the sent data, and then the data are sent to an inter-satellite network;
s4, the inter-satellite network performs label routing exchange between single satellites or multiple satellites according to the satellite labels encapsulated in the data, and forwards the data to a target satellite terminal;
and S5, after receiving the data forwarded by the inter-satellite network, the target satellite terminal decapsulates the satellite label information in the data and forwards the data to the user network according to the user addressing identifier.
Further, when the mapping relation in the identification tag mapping message is invalid, the satellite terminal retransmits the invalid identification tag mapping message to all other satellite terminals in the satellite network through the inter-satellite network, and the other satellite terminals analyze and invalidate the corresponding user addressing identification and the mapping information of the satellite tag after receiving the invalid identification tag mapping message.
A satellite network networking method based on label routing comprises the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by a satellite side into an identification label mapping message, and the identification label mapping message is sent to a routing service in the satellite network through an inter-satellite network;
s2, after receiving the identification label mapping message reported by the satellite terminal, the routing service analyzes and stores the user addressing identification and the satellite label mapping information carried in the message, and sends the collected and converged identification label mapping message to all other satellite terminals in the satellite network through the inter-satellite network;
and S3, after receiving the identification label mapping message sent by the routing service, other satellite terminals analyze and store the user addressing identification and the satellite label mapping information carried in the identification label mapping message.
Further, step S3 is followed by:
s4, when a user network at a user side of the satellite terminal is communicated with user networks at user sides of other satellite terminals, firstly, data are sent to the connected satellite terminal, the connected satellite terminal searches the learned user addressing identification and the mapping information of the satellite label according to the user addressing identification at the user side of the target satellite terminal carried in the sent data, the target satellite label corresponding to the searched user addressing identification at the user side of the target satellite terminal is encapsulated in the sent data, and then the data are sent to an inter-satellite network;
s5, the inter-satellite network performs label routing exchange between single satellites or multiple satellites according to the satellite labels encapsulated in the data and forwards the data to a target satellite terminal;
and S6, after receiving the data forwarded by the inter-satellite network, the target satellite terminal decapsulates the satellite label information in the data and forwards the data to the user network according to the user addressing identification.
Furthermore, satellite side interfaces of satellite terminals in the satellite network are all configured to be IP addresses of unified network segments or adopt unnumbered IP addresses.
Further, the user addressing identification of the satellite terminal user side is an IPv4 address, an IPv4 network segment, an IPv6 address, an IPv6 network segment or an MAC address.
Further, the satellite tag information allocated by the satellite side of the satellite terminal is composed of the satellite number and the downlink port number where the satellite terminal is currently located, or is a link layer address of the satellite terminal, or is combination information of the two.
Further, when the user addressing identification or the satellite label information in the identification label mapping message changes, the satellite terminal retransmits the updated identification label mapping message to all other satellite terminals in the satellite network through the inter-satellite network, and the other satellite terminals analyze and update the corresponding user addressing identification and the corresponding satellite label mapping information after receiving the identification label mapping message.
Furthermore, when the user addressing identification or the satellite label information in the identification label mapping message changes, the satellite terminal resends the updated identification label mapping message to the satellite network routing service through the inter-satellite network, the satellite network routing service analyzes and updates the corresponding user addressing identification and the mapping information of the satellite label after receiving the updated identification label mapping message, and sends the updated identification label mapping message to all satellite terminals of the satellite network through the inter-satellite network, and the satellite network satellite terminal analyzes and updates the corresponding user addressing identification and the mapping information of the satellite label after receiving the updated identification label mapping message;
when the mapping relation in the identification label mapping message is invalid, the satellite terminal sends the invalid identification label mapping message to a satellite network routing service through an inter-satellite network, the satellite network routing service disables the corresponding user addressing identification and the mapping information of the satellite label after receiving the invalid identification label mapping message, and sends the disabled identification label mapping message to all satellite terminals of the satellite network through the inter-satellite network, and the satellite network satellite terminal analyzes and disables the corresponding user addressing identification and the mapping information of the satellite label after receiving the invalid identification label mapping message.
Further, the routing service in the satellite network is deployed on any node in the satellite network or on an independent device independently, the routing service is one or more, and the user addressing identification and the mapping information of the satellite label stored by the routing service are kept synchronous.
Further, in step S4, when the data arrives and the satellite terminal cannot inquire the destination satellite tag corresponding to the user addressing identifier of the user network at the user side of the destination satellite terminal, broadcast inquiry is performed to other satellite terminals of the satellite network through the inter-satellite network, or inquiry is performed to the space-based network through the service.
Further, in step S5, when the inter-satellite network performs label routing switching between single satellites or multiple satellites according to the satellite labels encapsulated in the data, the load information on the labels is not analyzed, and a label routing forwarding table generated by a routing algorithm according to the whole inter-satellite network topology is used for label routing switching.
Compared with the background art, the invention has the following advantages:
1. the invention carries out satellite network networking based on the label routing, realizes the separation of the satellite-to-satellite routing and the ground routing, reduces the protocol processing burden and the forwarding complexity on the satellite, simplifies the routing forwarding function of the satellite in the satellite network, is convenient for the satellite to realize large-capacity exchange, and supports the large-scale satellite user networking and the multi-protocol unified bearing of user data.
2. According to the invention, the mapping relation between the user addressing identification and the satellite label is mutually learned between the satellite terminals, the satellite label is packaged for the user data according to the target user addressing identification, and the user data is routed and forwarded on the satellite and among the satellites by adopting the satellite label, so that the protocol processing burden on the satellite and the forwarding complexity are reduced.
3. The invention can realize the route learning and interaction of a large-scale satellite terminal in a satellite network, realize the route exchange and the bearing transmission of user data in the satellite network, and solve the problem that the satellite processing capacity can not support the networking application of large-scale satellite users under the constraint of the satellite network node processing capacity 'weak sky and strong earth'.
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FIG. 1 is a schematic diagram of an application scenario of the present invention;
fig. 2 is a schematic diagram of another application scenario of the present invention.
Detailed Description
The present invention will be described below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
A satellite network networking method based on label routing comprises the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by the satellite side into an identification label mapping message, and the identification label mapping message is sent to all other satellite terminals in the satellite network through an inter-satellite network;
and S2, after receiving the identification label mapping message, other satellite terminals analyze and store the user addressing identification carried in the message and the mapping information of the satellite label.
A satellite network networking method based on label routing comprises the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by a satellite side into an identification label mapping message, and the identification label mapping message is sent to a routing service in the satellite network through an inter-satellite network;
s2, after receiving the identification label mapping message reported by the satellite terminal, the routing service analyzes and stores the user addressing identification and the satellite label mapping information carried in the message; sending the collected and gathered identification label mapping message to all satellite terminals in a satellite network through an inter-satellite network;
and S3, after receiving the identification label mapping message sent by the routing service, other satellite terminals analyze and store the user addressing identification and the satellite label mapping information carried in the message.
In the two methods, the following processes can be further included at the end of the method:
(X1) when a user network at a user side of a satellite terminal communicates with user networks at user sides of other satellite terminals, firstly, data are sent to a connected satellite terminal, the connected satellite terminal searches for learned user addressing identification and mapping information of a satellite label according to user addressing identification at the user side of a target satellite terminal carried in the sent data, the target satellite label corresponding to the user addressing identification at the user side of the inquired target satellite terminal is packaged in the sent data, and then the data are sent to an inter-satellite network;
(X2) the inter-satellite network performs label routing exchange between single satellites or multiple satellites according to the satellite labels encapsulated in the data, and forwards the data to a target satellite terminal;
and (X3) after receiving the data forwarded by the inter-satellite network, the target satellite terminal decapsulates the satellite label information in the data and forwards the data to the user network according to the user addressing identification.
The satellite side interfaces of the satellite terminals in the satellite network are all configured to be IP addresses of unified network segments or adopt unnumbered IP addresses.
The user addressing identification of the satellite terminal user side can be IPv4 address, IPv4 network segment, IPv6 address, IPv6 network segment, MAC address and any identification for routing addressing in the user network.
The satellite tag information allocated by the satellite terminal at the satellite side may be composed of a satellite number and a downlink port number where the satellite terminal is currently located, or may be a link layer address of the satellite terminal, or may be combined information of the two.
When the user addressing identification or the satellite label information in the identification label mapping message changes, the satellite terminal needs to resend the updated identification label mapping message to all other satellite terminals in the satellite network through the inter-satellite network, and after receiving the identification label mapping message, the other satellite terminals analyze and update the corresponding user addressing identification and the corresponding satellite label mapping information.
When the mapping relationship in the tag mapping message is invalid, the satellite terminal needs to resend the invalid tag mapping message to all other satellite terminals in the satellite network through the inter-satellite network, and after receiving the invalid tag mapping message, the other satellite terminals analyze and invalidate the corresponding user addressing tag and the mapping information of the satellite tag.
When the user addressing identification or the satellite label information in the identification label mapping message changes, the satellite terminal needs to resend the updated identification label mapping message to the satellite network routing service through the inter-satellite network, the satellite network routing service analyzes and updates the corresponding user addressing identification and the mapping information of the satellite label after receiving the updated identification label mapping message, and sends the updated identification label mapping message to all satellite terminals of the satellite network through the inter-satellite network, and the satellite network satellite terminal analyzes and updates the corresponding user addressing identification and the mapping information of the satellite label after receiving the updated identification label mapping message.
When the mapping relationship in the tag mapping message is invalid, the satellite terminal needs to send the invalid tag mapping message to a satellite network routing service through an inter-satellite network, after receiving the invalid tag mapping message, the satellite network routing service invalidates the corresponding user addressing tag and the mapping information of the satellite tag, and sends the invalid tag mapping message to all satellite terminals of the satellite network through the inter-satellite network, and after receiving the invalid tag mapping message, the satellite network satellite terminal analyzes and invalidates the corresponding user addressing tag and the mapping information of the satellite tag.
Routing services in the satellite network can be deployed on any node in the satellite network or on independent equipment independently, but label routing accessibility and required link bandwidth between the satellite terminal and the routing services in the satellite network are required to be guaranteed, one or more routing services can be used for expansion and load sharing according to processing capacity and network scale, and user addressing identification stored in the routing services and mapping information of satellite labels are required to be kept synchronous.
When the data arrives and the satellite terminal can not inquire the target satellite label corresponding to the user addressing identification of the user network at the user side of the target satellite terminal, the satellite terminal can perform broadcast inquiry to other satellite terminals of the satellite network or perform inquiry to a space-based network by service through the inter-satellite network.
When the inter-satellite network carries out label routing switching between single or multiple satellites according to the satellite labels encapsulated in the data, the label routing switching does not involve the load-bearing information on the label, and the label routing switching uses a label routing forwarding table generated by a routing algorithm according to the whole inter-satellite network topology.
Fig. 1 and fig. 2 describe a specific scenario in which a satellite network performs routing networking based on a label routing method to implement data forwarding.
Fig. 1 shows a satellite network composed of 3 satellites, 3 sets of satellite terminals, 3 user networks and inter-satellite-to-ground links connecting the satellite terminals and the user networks, in the figure, satellite side interfaces of the satellite terminals 1, 2 and 3 are configured to the same network segment, the satellite terminals 1 are connected with the user networks 1, the satellite terminals 2 are connected with the user networks 2, the satellite terminals 3 are connected with the user networks 3, and the satellite terminals learn mapping information of user addressing identifications and satellite labels through inter-satellite network interaction.
Fig. 2 shows a satellite network composed of 3 satellites, 2 sets of satellite terminals, 2 user networks, 1 set of satellite network routing service and inter-satellite-to-ground links connecting the satellite terminals, in which the satellite terminals 1 and 2 satellite side interfaces are configured to the same network segment, the satellite terminals 1 are connected with the user networks 1, the satellite terminals 2 are connected with the user networks 2, the satellite terminals report the user addressing identification and the mapping information of the satellite labels to the satellite network routing service, and the satellite network routing service sends the satellite network routing service to other satellite terminals.
When the user network 1 communicates with the user network 2, data of the user network 1 is sent to the satellite terminal 1, the satellite terminal 1 obtains a target satellite label by searching learned user addressing identification and mapping information of the satellite label, the data is sent to the inter-satellite network after being packaged with the target satellite label, the inter-satellite network carries out routing forwarding to the target satellite terminal according to the target satellite label, and the data is forwarded to the user network 2 according to the user addressing identification after the target satellite terminal unpacks the satellite label.
In a word, the invention can realize the route learning and interaction of a large-scale satellite terminal in a satellite network, and realize the route exchange and the bearing transmission of user data in the satellite network, thereby solving the problem that the on-satellite processing capability can not support the networking application of a large-scale satellite user under the constraint of 'weak space and strong ground' of the processing capability of a satellite network node.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A satellite network networking method based on label routing is characterized by comprising the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by the satellite side into an identification label mapping message, and the identification label mapping message is sent to all other satellite terminals in the satellite network through an inter-satellite network;
and S2, after receiving the identification label mapping message, other satellite terminals analyze and store the user addressing identification carried in the identification label mapping message and the mapping information of the satellite label.
2. The method for networking the satellite network based on the label routing according to claim 1, wherein the step S2 is followed by further comprising:
s3, when a user network of a satellite terminal user side communicates with user networks of other satellite terminal user sides, firstly, data are sent to a connected satellite terminal, the connected satellite terminal searches for learned user addressing identification and mapping information of satellite labels according to user addressing identification of the target satellite terminal user side carried in the sent data, target satellite labels corresponding to the user addressing identification of the user network of the target satellite terminal user side are packaged in the sent data, and then the data are sent to an inter-satellite network;
s4, the inter-satellite network performs label routing exchange between single satellites or multiple satellites according to the satellite labels encapsulated in the data, and forwards the data to a target satellite terminal;
and S5, after receiving the data forwarded by the inter-satellite network, the target satellite terminal decapsulates the satellite label information in the data and forwards the data to the user network according to the user addressing identification.
3. The method according to claim 1, wherein when the mapping relationship in the tag mapping message is invalid, the satellite terminal retransmits the invalid tag mapping message to all other satellite terminals in the satellite network via the inter-satellite network, and the other satellite terminals parse and invalidate the mapping information of the corresponding user addressing tag and satellite tag after receiving the invalid tag mapping message.
4. A satellite network networking method based on label routing is characterized by comprising the following steps:
step S1, a satellite terminal in a satellite network combines a user addressing identification of a user side of the satellite terminal and satellite label information distributed by the satellite side into an identification label mapping message, and the identification label mapping message is sent to a routing service in the satellite network through an inter-satellite network;
s2, after receiving the identification label mapping information reported by the satellite terminal, the routing service analyzes and stores the user addressing identification and the mapping information of the satellite label carried in the information, and sends the collected and converged identification label mapping information to all other satellite terminals in the satellite network through the inter-satellite network;
and S3, after receiving the identification label mapping message sent by the routing service, other satellite terminals analyze and store the user addressing identification carried in the identification label mapping message and the mapping information of the satellite label.
5. The method for networking the satellite network based on the label routing according to claim 4, wherein the step S3 is followed by further comprising:
s4, when a user network of a satellite terminal user side communicates with user networks of other satellite terminal user sides, firstly, data are sent to a connected satellite terminal, the connected satellite terminal searches for learned user addressing identification and mapping information of satellite labels according to user addressing identification of the target satellite terminal user side carried in the sent data, target satellite labels corresponding to the user addressing identification of the user network of the target satellite terminal user side are packaged in the sent data, and then the data are sent to an inter-satellite network;
s5, the inter-satellite network performs label routing exchange between single satellites or multiple satellites according to the satellite labels encapsulated in the data, and forwards the data to a target satellite terminal;
and S6, after receiving the data forwarded by the inter-satellite network, the target satellite terminal decapsulates the satellite label information in the data and forwards the data to the user network according to the user addressing identification.
6. The method according to claim 4, wherein the satellite-side interfaces of the satellite terminals in the satellite network are configured as IP addresses of a uniform network segment or unnumbered IP addresses.
7. The method of claim 4, wherein the user addressing id of the user side of the satellite terminal is an IPv4 address, an IPv4 network segment, an IPv6 address, an IPv6 network segment or an MAC address.
8. The method as claimed in claim 4, wherein the satellite tag information allocated by the satellite side of the satellite terminal is composed of the satellite number and the downlink port number where the satellite terminal is currently located, or the link layer address of the satellite terminal, or a combination of the two.
9. The method according to claim 4, wherein when the user addressing identifier or the satellite tag information in the tag mapping message changes, the satellite terminal retransmits the updated tag mapping message to all other satellite terminals in the satellite network via the inter-satellite network, and the other satellite terminals parse and update the mapping information of the corresponding user addressing identifier and satellite tag after receiving the tag mapping message.
10. The method according to claim 4, wherein when the user addressing identifier or the satellite tag information in the tag label mapping message changes, the satellite terminal retransmits the updated tag label mapping message to the satellite network routing service through the inter-satellite network, the satellite network routing service receives the updated tag label mapping message, analyzes and updates the mapping information of the corresponding user addressing identifier and the satellite tag, and transmits the updated tag label mapping message to all satellite terminals of the satellite network through the inter-satellite network, and the satellite network satellite terminal analyzes and updates the mapping information of the corresponding user addressing identifier and the satellite tag after receiving the updated tag label mapping message;
when the mapping relation in the identification label mapping message is invalid, the satellite terminal sends the invalid identification label mapping message to a satellite network routing service through an inter-satellite network, the satellite network routing service disables the corresponding user addressing identification and the mapping information of the satellite label after receiving the invalid identification label mapping message, and sends the disabled identification label mapping message to all satellite terminals of the satellite network through the inter-satellite network, and the satellite network satellite terminal analyzes and disables the corresponding user addressing identification and the mapping information of the satellite label after receiving the invalid identification label mapping message.
11. The method for networking on a satellite network based on label routing according to claim 4, wherein the routing service in the satellite network is deployed on any node in the satellite network or on an independent device separately, the routing service is one or more, and the user addressing identifier stored by the routing service and the mapping information of the satellite label are kept synchronous.
12. The method as claimed in claim 5, wherein in step S4, when the data arrives and the destination satellite tag corresponds to the user addressing identifier of the user network at the user side of the destination satellite terminal that cannot be queried by the satellite terminal, the satellite terminal performs broadcast query to other satellite terminals of the satellite network through the inter-satellite network or performs query to the space-based network through the service.
13. The method for networking a satellite network based on label routing according to claim 5, wherein in step S5, when the inter-satellite network performs label routing switching between single or multiple satellites according to the satellite label encapsulated in the data, the label routing switching uses a label routing forwarding table generated by a routing algorithm according to the whole inter-satellite network topology without analyzing the bearing information on the label.
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