Destruction-Resistant Routing Protocol Based on Topology Prediction and Backup Path

Aiming at the problem of poor adaptability of traditional OSPF routing protocol in high dynamic space-based information network, this paper proposes I-OSPF routing protocol based on topology prediction and backup path, adopts variable cycle topology discovery mechanism, dynamically adjusts OSPF topology discovery cycle by predicting the time of network topology change, and reduces the topology discovery cycle when the topology is about to change. Meanwhile, topology maintenance nodes are selected to broadcast link information, replacing the mechanism of all nodes forwarding link information, which effectively reduces the flood load. In addition, two transmission paths from the source node to the destination node are constructed to evenly distribute the network traffic and ensure the invulnerability of the network. In this paper, the simulation scenario of space-based information network is established, and the simulation test of the proposed routing protocol is carried out. The results show that the I-OSPF routing protocol has an obvious effect on improving the network survivability, greatly reduces the fault perception time, and improves the discovery efficiency of rerouting.