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在具有星际链路的低地球轨道(LEO)卫星网络中,高度动态的网络拓扑和受限的星上资源为其路由协议设计带来很大的挑战.提出了一种简洁的星上分布式路由协议ODRP来应对这种挑战.在ODRP协议中,单层LEO星座被作为双层星座处理.根据星际链路动态特性和流量分布情况,各轨道面内位于一定位置的卫星节点被选作为轨道面发言人,从而实现简洁的分布式分层路由.实验结果表明,ODRP能够适应网络拓扑的动态变化,保证路由最优.尤其是在高负载情况下,能够有效降低分组丢失率.通过复杂性分析得知,与其他星上路由机制相比,ODRP具有较低的通信开销、计算开销和存储开销.
In Low Earth Orbit (LEO) satellite networks with interplanetary links, highly dynamic network topologies and limited on-board resources pose a significant challenge to their routing protocol design.A concise satellite distributed Routing protocol ODRP to cope with this challenge.In the ODRP protocol, the single LEO constellation is treated as a double constellation.According to the dynamic characteristics of the interstellar link and traffic distribution, the satellite nodes in the orbital plane at a certain position is selected as the track Plane spokesman, so as to achieve a simple distributed hierarchical routing.The experimental results show that ODRP can adapt to the dynamic changes of the network topology to ensure the optimal routing, especially in high load conditions, can effectively reduce the packet loss rate.Through the complexity Analysis shows that, compared with other on-board routing mechanisms, ODRP has lower communication overhead, computing overhead and storage overhead.