面向GEO/LEO双层卫星网络的抗毁路由策略

Destruction-resistant routing strategy for GEO/LEO double-layer satellite networks

卫星网络的高动态拓扑性和其运行环境的恶劣性,使得地面网络的路由策略不再适用,卫星网络故障难以得到修复,因而如何设计一种高效的卫星抗毁路由策略是当前卫星网络的研究热点。文中提出了一种面向GEO/LEO双层卫星网络的抗毁路由策略,采用虚拟节点与区域划分相结合的方式,设计了新的链路状态评价函数和重路由触发机制,以Floyd算法计算路由,采用了局部更新方式分发新路由表。仿真结果表明,该策略能够在保证通信质量的前提下,减少重路由次数、故障恢复时长、路由表更新卫星数,对比传统卫星路由策略,拥有更好的抗毁性能。

Due to the high dynamic topology of the satellite network and the harshness of its operating en- vironment, the routing strategy of the terrestrial network is no longer applicable and it is difficult to repair the satellite network fault, so how to design an efficient satellite destruction-resistant routing strategy be- comes a research hotpot in the satellite network. A new destruction-resistant routing strategy for GEO/LEO two-layer satellite network is proposed. A link state evaluation model and a rerouting mechanism are de- signed by using virtual node and region partitioning. By using Floyd algorithm to calculate routing, a local update is used to distribute a new routing table. Simulation results show that the strategy can reduce the number of rerouting,the length of the fault recovery, and the number of satellites to update the number of satellites. Compared with the traditional satellite routing strategies, the strategy has better survivability.