Abstract:

The coverage and inter satellitelink（ISL） performances of low earth orbit & geo-synchronous Earth orbit (LEO&GEO) double layered satellite network are first introduced in detail. Then layering and clustering level management is proposed, which can simplify the ISL connectivity because just the head satellite of a cluster has the connectivity to GEO satellite. Under the network model, a dynamic routing algorithm which considers path delay and ISL link load is proposed. Compared with single layer satellite networks, multilayer satellite networks distribute traffic more evenly and they can distribute traffic through GEO satellite just when the route hops exceed the threshold or the network link utility exceeds the threshold. Simulation results show that the proposed routing algorithm results in low delay, small delay jitter and provides excellent performance for the quality of service.