A Load-Balancing Based Research on Inter-satellite Link-Building Planning for Navigation Satellite Network

Based on navigation satellite network constituted by phased array inter-satellite links, our research proposes to optimize rapidly changing inter-satellite links topology. In the beginning of our research, we establish the topological model of the navigation satellite constellation dynamic network, and clarify the routing strategy. Then according to the principle that the topology is uniquely determined, our research analyzes the asymmetric traffic characteristics of the navigation satellite network. Furthermore, a topological link optimization method based on predicting load balance is proposed to describe the calculation steps of the link-building optimization method. Moreover, we verify load-balancing performance of inter-satellite link-building optimization method by using average time delay, maximum time delay and cache occupancy as indicators. It is verified through simulation that the load-balancing based inter-satellite link-building optimization method is feasible, at the same time, it is a valuable reference for planning of building inter-satellite links of the global navigation systems.