空间信息网络的改进路由算法研究

研究了空间信息网络的拓扑结构和路由特点，对网络的星间链路长度和覆盖性能进行了分析。针对空间信息网络的特点对现有算法进行了改进，并加入一些优化措施，从而形成一种新的适用于空间信息网络应用的动态路由算法，该算法能够找出任意两颗卫星间通信的最佳路径集合，同时能够在链路质量容许的情况下，尽量避免通信链路切换的发生，从而较大地提高了系统性能。通过仿真和分析表明该算法提高了系统性能，降低了切换概率，增加了链路的可靠性，且相对付出的链路代价较小。

A modified routing algorithm for space information network

In this paper, it studied the topology architecture and routing characteristics of the space information network, then the length of ISL(inter satellite link) and performance of coverage are analyzed. It improved the algorithm for the characteristics of space information network and made some optimizing ways. Then it proposed a new routing algorithm applied for space information network. The new algorithm can find the aggregate of best communication routes between any two satellites, and can reduce link switching as much as possible, thus the system performance is improved.Analysis and simulation results show that the new routing algorithm can enhance the performance of the network, and increase the link reliability, on the other hand, it costs very little link requirements.