Route Maintenance Strategy Based on the Packet Lost Distinguish for Space Information Networks

Due to the characteristic of highly dynamic topology, high bit error rate and large propagation delay of inter-satellite links, the reasons causing packet loss are various in the space information networks. As traditional routing maintenance strategy of source node rerouting causes high time delay and high network overhead, the new strategy based on packet loss distinction is proposed. Routing maintenance strategy distinguishes the reasons of packet loss by sending high and low priority packets alternately. Then routing maintenance mechanisms are designed specifically according to different reasons. Simulation results indicate that the proposed routing strategy can effectively improve network performance.