基于Opnet平台的战术Ad-hoc子网建模仿真

摘要

由于报文到达服从长相关特性,利用能较好描述长相关特性的自相似模型,借助Opnet仿真手段对战术Ad -hoc子网进行了建模及仿真.仿真中自相似流量模型采用的是多重汇聚的ON/OFF过程模型,网络MAC层选用IEEE 802.11协议的DCF接入方式.根据Opnet仿真软件运行结果的分析,最终得出通信量自相似性对战术Ad-hoc子网性能影响很大,网络的各项性能指标如延迟及丢包率随着自相似程度的增加将变得越来越差,这对战术Ad-hoc网络的应用开发、网络规划及优化配置具有一定的参考价值.%The tactical Ad-hoc network based on self-similarity model is studied and the model is developed and implemented in opnet based on the model of assembling of multiple ON/OFF sources model. IEEE 802.11 DCF is adopted for MAC protocol.The results have shown that self-similarity has great influence on Ad-hoc network performance, the higher the self-similar degree,the worse the network performance.Valuable reference for tactical Ad-hoc network application exploration is provided by comparing and analyzing the simulation results of this traffic model.