LTE中基于协作AODV协议的拥塞控制机制研究

摘要

针对LTE网络已有的拥塞控制算法无法适应分布式网络拓扑和复杂的网络环境以及自身效率低、开销大等问题,分析了LTE网络无线信道质量对AODV协议性能的影响,建立了基于路径损耗门限值的协同合作方式下的AODV路由机制,在此基础上,提出了一种基于队列长度和跳数的拥塞控制策略,分别通过LTE网络链路级仿真实验验证了改进后的基于协作路由协议的无线TCP拥塞控制机制的性能.数学分析和仿真结果表明,所提协作拥塞控制机制与传统的TCP拥塞控制机制相比,在平均丢包数、队列长度抖动、时延、时延抖动和吞吐率等方面均具有良好的性能.%Aiming at the problems that existing GPP-LTE network congestion control algorithm can not adapt to the distributed network topology and the complex network environment and its efficiency is low,and cost is big, this paper analyzed LTE network wireless channel quality on the AODV protocol performance. Based on the path loss threshold cooperative mode AODV routing mechanism, this paper put forward a based on the queue length and the number of hops congestion control strategy. LTE network link level and system level simulation experiment proves performance of the modified congestion control mechanism in wireless TCP based on cooperative routing protocoL Mathematical analysis and simulation results show that compared with the traditional TCP congestion control mechanism , the cooperative congestion control mechanism has better performance.