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Satellite network reliable routing method based on virtual nodes

A technology of virtual nodes and satellites, applied in network planning, radio transmission systems, electrical components, etc., can solve the problems of satellite node routing information acquisition complexity, etc., achieve good routing convergence, reduce the waste of available bandwidth, and enhance the effect of usability

Inactive Publication Date: 2010-10-27
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0009] Technical problem: The purpose of the present invention is to provide a reliable routing method for satellite networks based on virtual nodes to solve the complexity of satellite node routing information acquisition

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  • Satellite network reliable routing method based on virtual nodes
  • Satellite network reliable routing method based on virtual nodes
  • Satellite network reliable routing method based on virtual nodes

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Embodiment Construction

[0032]The satellite network routing method of the present invention is composed of the definition of "virtual node", the acquisition of reliable routing information and the inheritance of the routing information of "virtual node". Through the definition of "virtual node", we divide the earth's surface covered by the satellite system into several ground logical areas represented by (longitude value, latitude value), and the actual satellite is represented by the address of a certain ground logical area covered by it ; After the satellite is expressed as a "virtual node", it is necessary to obtain the connectivity of the surrounding "virtual nodes" through reliable routing information; due to the dynamic topology of the satellite network system, when the role of the "virtual node" played by the satellite changes At the same time, it is hoped that the routing information owned by the "virtual node" can be passed to the next satellite that plays this role, and the forwarding path o...

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Abstract

The invention relates to a satellite network reliable routing method on the basis of virtual nodes, which is applied in single-layer routing protocols under similar polar orbit constellation models and is mainly used to solve the complexity problem that a satellite node obtains routing information. The method comprises: marking a satellite by an address of a ground logic area which is covered by the satellite, namely, being endowed with a specific role, knowing the communication conditions of surrounding virtual nodes through sending a link probe packet, generating a route updating information packet under the virtual nodes, setting flooding hop number as N, then, sending to link interfaces which satisfy the demands, receiving satellite virtual nodes of the route updating information packet, correcting parameters in the route updating information packet, extracting reached hop number J of information of each route prefix of the route updating information packet, and obtaining the theoretical shortest path length L from the satellite virtual nodes to the target ground logic area through a computational method of the ideal shortest path length, wherein the routing method shields thedynamictopology characteristics of internet, improves the routing astringency, and lowers the time delay of data packet transfer.

Description

technical field [0001] The invention is a dynamic routing method suitable for a satellite network, which is mainly used to solve the complexity problem of satellite nodes obtaining routing information under the dynamic topological structure of the satellite network, and belongs to the field of network protocol design. Background technique [0002] In recent years, due to its important strategic position, the satellite network has gradually become a research hotspot in the world's space powers. The satellite network connects satellites of different orbits, types and performances, space vehicles and other space entities and ground facilities through satellite interstellar and satellite-ground communication links, forming an integrated communication network that can cover the whole world. The principle of effective comprehensive utilization, interconnection, and organically constituted intelligent system. The satellite network has independent information acquisition, storage, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/02H04W16/22H04B7/185
Inventor 王汝传张勇饶元徐小龙郑彦孙力娟张登银
Owner NANJING UNIV OF POSTS & TELECOMM
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