基于移动代理的卫星网路由性能研究

摘要

通过仿真方法分析代理系统中影响基于移动代理卫星网路由算法性能的关键因素,给出了拟仿真的路由算法及其NS2仿真方案,详细阐述了使用Grasshopper、JADE和Linux、运行于局域网环境、支持代理的卫星网仿真平台构建方案,包括仿真平台的系统结构、卫星节点功能实体、路由代理交互接口、星际链路仿真模块等.通过与NS2中的仿真结果对比,得出了高链路时延下的移动代理迁移效率是影响路由算法性能的关键因素,并通过代理系统间横向比较,给出了路由算法开发以及仿真平台构建过程中代理系统的选择建议.%The key factor of current agent system, which affects the performance of mobile agent-based satellite network routing algorithm, is investigated through simulation. The routing algorithm simulated is given, and its simulation method in NS2 is presented. Agent system-based Satellite Network Simulation platform (ASNS) is elaborated. ASNS operating in local area network is constructed based on Linux, Grasshopper and JADE. Several essentials are presented, including simulation platform architecture, satellite entity, routing agent interaction interface and inter-satellite link simulation module. Through analyzing the simulation results from NS2 and ASNS, such conclusion is drawn that mobile agent migration efficiency under high link delay is the decisive factor on the performance of mobile agent-based satellite network routing algorithm. Besides, based on the comparison between agent systems, the choice strategy of agent system is suggested to develop routing algorithm and its simulation platform.