基于Iridium系统卫星网络路由算法的OPNET建模与仿真

Iridium System-based OPNET Modeling and Simulation of Satellite Network Routing Algorithm

互联网的普及和空间卫星技术的不断飞速发展,使空间卫星网络技术逐渐成为下一代通信网络的研究热点之一。由于OPNET缺少相应的标准卫星模块,必然使得空间网络的仿真存在一定的难度。针对Iridium系统卫星网络,搭建一种OPNET路由仿真模型。该仿真模型主要由三部分组成:卫星网络域、卫星节点域和路由进程域。卫星网络域构建整体的网络拓扑结构及卫星运行轨迹;节点域模拟数据的生成和收发;进程域完成路由算法的操作。为了检验模型,仿真分析了一种星上路由算法的平均路由跳数与延时性能。仿真结果表明,所提仿真模型与理论研究相符合,且不仅可以通过修改路由进程域实现多种路由算法策略,还可以为后续卫星网络抗毁性能的研究提供一种简单有效的技术手段。

With the wide application of Internet and the rapid development of satellite technology, satellite network gradually becomes an important part of the next generation Internet. For the OPNET does not provide standard satellite and satellite router module, certain difficulty is inevitable brought to the simulation of satellite network. In view of.the Iridium satellite network, this paper puts forward a kind of OPNET routing simulation model is proposed. The simulation model is mainly composed of satellite network, satellite node domains and routing process domain, satellite network domain implements the dynamic change of network topology; node domain simulate data generation and sending receiving; routing process domain completes the specific implementation of routing algorithm. To test the performance of the model, the simulation analysis is done on the average routing hop and delay performance of the satellite algorithm routing. Simulation results show that the proposed simulation model is correct and feasible, and of a certain generality, could provide a simple and effective way for satellite communication network performance simulation and analysis.