A Disruption Tolerant Distributed Routing Algorithm in LEO Satellite Networks

The low earth orbit (LEO) constellation network has become a promising approach to provide global communication services, due its advantages in wide coverage, transmission delay, and convenient networking. However, the instability of intersatellite laser terminal high relative speed between adjacent satellites cause frequent topology changing problems for data routing. In this paper, disruption tolerant distributed routing algorithm (DTDR) is proposed, where calculate alternate path when changes, which improves performance packet loss. Specifically, each satellite maintains link (ISL) information within specified number hops. When an ISL state changes hops, corresponding calculates switches detour path. Furthermore, traffic balanced through process. Various simulations were constructed show that proposed outperforms existing terms loss ratio delay.