车载网中一种低延时的广播路由  

A Low Latency Broadcast Routing in VANET

作　　者：杨茂保[1] 徐利亚 葛明珠 舒长兴[1] Yang Maobao;Xu Liya;Ge Mingzhu;Shu Changxing(Jiujiang University,Jiujiang 332005)

机构地区：[1]九江学院,九江332005

出　　处：《汽车技术》2018年第12期13-18,共6页Automobile Technology

基　　金：国家自然科学基金项目(61362032;61662039);江西省青年科学基金项目(20151BAB217015);江西省教育厅科学技术研究项目(GJJ170967;GJJ151081;GJJ61678);九江学院科研课题(2015LGYB28)

摘　　要：针对车载自组织网络中大量节点传输信息带来信道竞争,使数据包重传次数增多,引发广播风暴的问题,提出了车载网中一种低延时的广播路由(LLBR)。基于减少广播数据包节点数量的策略,对当前节点的邻居节点构建连通支配集,并优化近似成最小连通支配集,以该支配集中的节点为中继节点并以一定的概率广播数据包。仿真结果表明,所提出的广播路由与传统的广播方法基于邻居覆盖的概率转发(NCPR)和基于距离的多跳广播(DMB)相比,在平均端到端延时和数据包递送率方面有较大改善。Broadcast storm was caused by the increase of data packet and channel contention resulting from information transmission of large amount of nodes in the Vehicular Ad hoc Network(VANET).To solve this problem,a Low Latency Broadcast Routing(LLBR)was proposed in VANET.Based on the strategy to reduce the number of broadcasting data packet node,a connected dominating set was constructed for the neighboring nodes of the current node,which was optimized to approximate the Minimum Connected Dominating Set(M-CDS).The nodes of the M-CDS was used as relay node and data packet was broadcasted at a given probability.Simulation results have shown the effectiveness of the proposed broadcast routing is improved considerably compared to two traditional broadcast protocols NCPR and DMB in end-to-end latency and packet delivery rate.

关 键 词：车载网 紧急信息 广播路由 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]