车载安全应用广播性能分析  

Performance evaluation of broadcast for vehicular safety applications

作　　者：熊栋宇[1] 陈前斌[1] 唐伦[1] 陈培然[1] 

机构地区：[1]重庆邮电大学移动通信重点实验室,重庆400065

出　　处：《计算机应用研究》2010年第4期1437-1440,共4页Application Research of Computers

基　　金：国际科技合作计划项目(2008DFA12110);新世纪优秀人才支持计划项目(NCET-06-0778);重庆市自然科学基金资助项目(CSTC2007BB2390;CSTC2008BB2413)

摘　　要：在仿真软件NS-2.29和VanetMobiSim1.1下,搭建了车载通信网络仿真平台,讨论了广播信标信息在不同距离下的接收率,并对两类广播信息在EDCA方式下的接收率和接入时延进行了深入的分析和比较。仿真结果表明,隐藏终端导致广播数据的严重丢包而且不同竞争窗口对接入时延有很大的影响,尤其是在信道负荷比较重时。最后指出了可行的解决思路。This paper first built the simulation platform of vehicular communication network through the simulation software NS-2.29 and VanetMobiSim1.1,then argued the reception rate of periodic message at different distances and deeply discussed the reception rate and access time of two different broadcast messages in the manner of EDCA.Simulation results show that the hidden terminals lead to the packet serious loss of broadcast data,also show different contention window has a great impact on access latency,especially relatively heavy load in the channel.Finally,pointed out a viable solution.

关 键 词：车载通信 NS-2.29 广播 接收率 时延 EDCA 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术] TP393.06[自动化与计算机技术—计算机科学与技术]