A LEO Satellite Network Capacity Model for Topology and Routing Algorithm Analysis

Abstract

In this paper, a Low Earth Orbit (LEO) satellite network capacity model is proposed to value the influence of topology and routing strategy on throughput capacity. Under the network capacity balance framework, two topology strategies and two routing algorithms are studied. The analysis solution shows that for LEO constellation, the topology strategy with opposite direction links could increase the quantity of inter satellite link (ISL), reducing the traffic on each link. Central routing algorithm presents superior traffic distribution ability in LEO network than distributed routing strategy. Simulation results prove that central routing algorithm combined with opposite direction ISL topology in LEO satellite network could reduce data packet loss rate, achieve optimization and robustness on network capacity.