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空间网络拓扑持续动态变化、节点资源受限等特点,致使地面路由协议难以直接应用于空间网络.本文结合空间网络的特点,借鉴地面网络的路由机制,设计并实现了一种通用型预置空间路由协议——PSRP(Presetting Space Routing Protocol).PSRP协议是一种动静结合的自适应空间路由协议,其主要思想是:充分利用空间网络拓扑变化的可预知性,预先将拓扑变化的时机和对应的路由信息保存在各节点上,并依据拓扑变化的时机切换路由表,在网络发生异常时能及时更新各节点保存的路由相关信息.实验仿真证明,PSRP在网络正常运行时因可以省去网络拓扑变化引起的路由收敛和重分布过程,从而大大提高了链路利用率,降低了报文丢包率,节省了报文交互开销.
Due to the characteristics of the space network, such as the continuous dynamic change of the topological network topology and limited resources of the nodes, it is difficult to directly apply the ground routing protocol to the space network.Based on the characteristics of the space network and using the routing mechanism of the terrestrial network for reference, a universal preset space is designed and implemented Routing protocol - PSRP (Presetting Space Routing Protocol) .PSRP protocol is a combination of dynamic and static adaptive space routing protocol, the main idea is: make full use of the predictability of changes in the topology of the network topology, the timing and corresponding changes in the topology Routing information is saved on each node and the routing table is switched according to the timing of the topology change so as to timely update the routing information saved by each node in the event of network anomaly.The experimental simulation proves that PSRP can save the network when the network is in normal operation The route convergence and redistribution caused by the otherid2ology change greatly improve the link utilization rate, reduce the message packet loss rate, and save the packet interaction cost.