地月空间通信网络协议研究

Research on Network Protocol of Cislunar Space Communication

针对地月空间长距离通信较长延时及月背遮挡导致的间断性链路连接问题,同时为解决有限资源下地月空间网络通信综合利用问题,基于地月空间通信链路形成了通信方案,应用DTN协议和IP over AOS协议构建了网络拓扑结构,并对六星双圆、四星双圆、三星单圆、双星单圆4种极圆轨道进行了网络仿真指标设计与网络仿真。仿真结果表明:在节点缓存能力等约束下,相同仿真参数中4种中继星座架构的数据包递交率与星座中卫星数量呈正相关,对延迟敏感的实时性数据包在不同星座架构下平均时延最大相差仅约0.04 s。以DTN协议作为地月空间信息系统组网通信的主要协议架构,可以满足各类应用业务数据传输要求。

To solve the problems of the delay of long-distance communication in cislunar space and the intermittent link connection caused by the shielding of the far side of the Moon,and to realize the comprehensive utilization of the limited resources in cislunar network communication,the system networking communication scheme was established according to the communication link of cislunar space and the network topology structure was constructed using the DTN and IP over AOS protocol.The design of the network simulation indexes and the simulation of the network were conducted for four polar circle orbits including six-star double circle,four-star double circle,three-star single circle and double-star single circle.The simulation results showed that:under the constraints of node cache capacity and other constraints,the packet delivery rate of the four relay constellation architectures with the same simulation parameters was positively correlated with the number of satellites in the constellation,and the maximum difference of average delay for delay-sensitive real-time data packets under different constellation architectures was only about 0.04 seconds.The DTN protocol,as the main protocol architecture for the network communication of the cislunar space information system,could meet the transmission requirements of data in all kinds of application services.