基于Nakagami-m信道模型的V2X通信协议  

V2X communication protocol based on Nakagami-m channel model

作　　者：王桐[1] 张健锋 WANG Tong;ZHANG Jianfeng(College of information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院

出　　处：《应用科技》2019年第4期53-60,共8页Applied Science and Technology

基　　金：哈尔滨市青年后备人才项目(2015RAQXJ008)

摘　　要：车载自组网(vehicular ad?hoc networks,VANETs)已经成为智能交通(intelligent transportation system,ITS)的重要组成部分。在高速动态的城市环境下,为使道路车辆尽快选择到传输信息的最佳路线,提出一种基于Nakagami?m信道模型的V2X通信协议(V2X communication protocol based on Nakagami?m channel model,VCNCM),来提高数据传输率(packet delivery ratio,PDR)和降低平均端到端延迟(average?end?to?end?delay,AE2ED)。本协议采用路边基础单元(road side units,RSUs)辅助通信系统来寻找最佳的通信路径。同时,本协议还使用考虑车辆速度和密度的动态广播机制来提高路由决策的准确性。仿真实验采用SUMO处理哈尔滨的市区地图,其中NS3的仿真结果表明VCNCM在PDR和AE2ED方面具有较大的优势。Vehicular Ad?Hoc Network(VANETs)has become an important part of intelligent transportation system.In the high?speed dynamic environment,the vehicle cannot select the best path of information transmitting as soon as possible.Thus,this paper presents a V2X communication protocol based on Nakagami?m channel model(VC?NCM)to increase Packet Delivery Ratio(PDR)and reduce Average?End?to?End?Delay(AE2ED).VCNCM con?siders RSU?assisted communication system to help find the best routing path.Meanwhile,the dynamic broadcasting mechanism considering various vehicle velocity and density is applied to increase the accuracy of protocol decisions.VCNCM used SUMO to provide an urban scene in downtown Harbin,from which the simulation results in NS3 show the advantage of VCNCM compared with other protocols in terms of PDR and AE2ED.

关 键 词：智能交通 车载自组网 Nakagami-m信道模型 动态信标机制 RSU辅助通信 

分 类 号：TN929.52[电子电信—通信与信息系统]