Satellite network inter-satellite routing method based on topology predictability

Abstract

The invention belongs to the field of communication, and relates to a satellite network inter-satellite routing method based on topology predictability. The method comprises the following steps: initializing an inter-satellite link on-off time table and a link state database according to an orbit parameter six-tuple of a first satellite; setting and starting an overtime timer; when the timing of the timeout timer is ended, generating a routing link state notification for generating a first satellite node; setting an information judgment value; if the judgment value is true, diffusing the generated LSA to all other satellite nodes in the domain by adopting an LSA message diffusion mechanism, and restarting an overtime timer; if the judgment value is not true, deleting the generated LSA, andrestarting an overtime timer; the second satellite receives the LSA sent by the first satellite; calculating the route of the second satellite by adopting a shortest path algorithm according to the obtained LSA, and completing the route information transmission of the satellite; according to the invention, the sending number of routing control messages can be greatly reduced, and meanwhile, the routing convergence rate is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a topology-predictable satellite network inter-satellite routing method. Background technique [0002] With the continuous expansion of our country's needs in space exploration, emergency communications, military and other fields, it is imminent to build a space-ground integrated network that is deeply integrated with space network, ground Internet and mobile communication network. The key to realizing the space-ground integrated network is to realize the integration of the core layers (that is, the network layer) of various heterogeneous networks, and the routing problem is the top priority. Introducing the IP protocol family into the space-ground integrated network can give full play to the strengths of Internet technology, and build the space-ground integrated network more quickly with lower overhead. [0003] However, the intra-domain routing protocol (OSPF routing proto...

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Problems solved by technology

[0004] However, the OSPF protocol of this method uses the periodic hello message sending mechanism to detect the connection status of the link. If the setting period is long, it will cause OSPF to be unable to track the change of the link connection status in time. If the setting period is short, the It will cause routing nodes to frequently send Hello packets, wasting link resources

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