MTCR-CR routing strategy for connection-oriented routing over satellite networks

The high-speed movement of satellites makes it not feasible to directly apply the mature routing scheme on the ground to the satellite network. DT-DVTR in the snapshot-based connection-oriented routing strategy is one of the representative solutions, but it still has room for improvement in terms of routing stability. In this paper, we propose an improved scheme for connection-oriented routing strategy named the Minimal Topology Change Routing based on Collaborative Rules (MTCR-CR). The MTCR-CR uses continuous time static topology snapshots based on satellite status to search for intersatellite link(ISL) construction solutions that meet the minimum number of topology changes to avoid route oscillations. The simulation results in Beidou-3 show that compared with DT-DVTR, MTCR-CR reduces the number of routing changes by about 92%, the number of path changes caused by routing changes is about 38%, and the rerouting time is reduced by approximately 47%. At the same time, in order to show our algorithm more comprehensively, the same experimental index test was also carried out on the Globalstar satellite constellation.