车联网中基于距离的多转发者广播协议  

Multi Senders Broadcast Protocol Based on Distance in Internet of Vehicles

作　　者：韩江洪[1,2] 李超[1] 卫星[1,2] 魏振春[1,2] 

机构地区：[1]合肥工业大学计算机与信息学院,合肥230009 [2]安全关键工业测控技术教育部工程研究中心,合肥230009

出　　处：《计算机工程》2015年第1期6-11,共6页Computer Engineering

基　　金：国家自然科学基金资助面上项目(61370088);高等学校博士学科点专项科研基金资助项目(20100111110004);安徽省自然科学基金资助项目(1208085QF113)

摘　　要：为实现安全信息在车载自组织网络中快速、有效的传播,提出一种基于距离的多转发者广播协议。将上一跳转发节点信号边缘处的节点作为最优转发节点,以增加单次转发覆盖新节点的数量。选择信号覆盖范围中点处节点和次接近信号覆盖范围边缘处节点作为备选转发节点,以降低因隐蔽站或车辆脱离信号覆盖范围导致转发失败的概率,并通过反向车辆存储转发广播分组恢复路由。仿真结果表明,该协议能够适应多种车辆密度的车载自组织网络,满足不同交通流密度情况下紧急信息的分发要求,降低车辆间通信的平均端到端延时和转发率,提高转发效率,并且负载上升缓慢,能有效抑制广播风暴。In order to make safety messages broadcast fast and efficiently in Vehicular Ad-hoc Network（VANET）,this paper proposes a multi senders broadcast protocol based on distance（DMSBM）. In order to cover the most new nodes,DBMSB protocol selects the signal coverage bounder node of pre-node as the best forwarding node,and selects the midpoint node of the signal coverage and the secondary node close to the edge point as alternative forwarding node to avoid forwarding failure rate caused by hidden stations and nodes out of the signal coverage. It also uses the reverse vehicle to store and forward broadcast packet to restore routing. Simulation results show that this protocol can adapt to VANET with a variety of vehicle density,and it can also meet the distribution of emergency information under various traffic densities. It can reduce the average end to end delay and enhance the forwarding efficiency. Routing load rises slowly in this protocol,which can effectively inhibit broadcasting storm.

关 键 词：车载自组织网络 广播协议 存储转发 多转发 隐蔽站冲突 路由恢复 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]