摘要
针对多播应用中路由协议的QoS保障问题,基于多播路由协议ODMRP(On-Demand Multicast Routing Protocol)提出了一种新的具有QoS约束的路由协议ODMRP-QoS。首先定义了一个依赖于带宽、时延、节点能量三个QoS性能指标的路由函数,作为最佳路由选择的依据,函数数值的最大值路径为最佳路由,以此保证所选路径满足用户的QoS需求,同时说明了函数参数的计算方法及约束条件;然后给出了ODMRP-QoS路由建立、维护和更新的技术实现方案。网络仿真结果表明:ODMRP-QoS协议性能明显优于原ODMRP协议,达到了保证多播应用QoS的效果。
A new ODMRP-QoS protocol with QoS constraints was proposed to aim the the problem of the QoS ensurance in multicast application.A routing selecting function was defined,with the parameter such as bandwidth,delay and node remainder energy,then the protocol would select the route with the maximal function value.Therefore it could meet users＇ command of QoS.And the constraints and calculation formulas of function parameter were proposed.Then the technology realization about routing setup,maintain and update of the ODMRP-QoS was proposed.The simulation results show that the improved protocols have better performances than the old ones.
出处
《计算机技术与发展》
2011年第4期65-68,72,共5页
Computer Technology and Development
基金
国家863科技支撑计划(2010AA701202)
瑞典-亚洲国际合作项目(348-2008-6212)
留学回国人员项目(NJ209002)
关键词
AD
HOC网络
路由协议
服务质量
多播路由
Ad Hoc networks
routing protocol
quality of service
multicast routing
