基于方向矢量角簇群和桥节点的车间通信协议  

Vector-angle-cluster and Bridge Nodes-Based Routing Protocol for Inter-vehicle Communication

作　　者：于春玲[1] 朱玉全[2] 

机构地区：[1]江苏食品药品职业技术学院信息系,淮安223005 [2]江苏大学计算机科学与通信工程学院,镇江212013

出　　处：《科学技术与工程》2017年第11期233-237,共5页Science Technology and Engineering

基　　金：江苏省现代教育技术研究课题(2012-R-21983);淮安市科技支撑计划(HAGZ2013012)资助

摘　　要：在车载自组织网(vehicular ad hoc networks,VANET)中,高动态的拓扑结构和频繁断裂的链路给车间通信提出挑战。为此,针对VANET城市场景,提出基于方向矢量角簇群和桥节点的路由(vector-angle-cluster and bridge nodes-based routing,VAC-BNR)协议。VAC-BNR协议将城市道路划分为十字路口区域和十字路口间的直线路段区域。在十字路口区域内,选择合适的车辆作为桥节点;并由桥节点连通断裂的链路。而在直线路段区域,利用矢量角将车辆划分不同的簇群,然后计算每个簇群内节点的效用值;并选择效用值最高的车辆传输数据。仿真结果表明,提出的VAC-BNR协议能够有效地降低端到端传输时延、提高数据包传递率。与AMD相比,VAC-BNR协议的平均端到端传输时延下降了约30%,当车流密度大于80辆/km^2时,数据包传递率提高了约50%。In vehicular ad hoc networks （ VANET） ,due to the nature of VANET, highly dynamic and frequent disconnection, inter-vehicle communication faces great challenges. Therefore, vector-angle-cluster and bridge nodes-based routing （VAC-BNR） protocol is proposed. In V A C - B N R protocol, the urban road is divided into intersection area and inter-intersection direct road segment. In intersection area, the appropriate vehicles are selected to be bridge nodes, and they fill the connectivity gap between disconnected links. Then in inter-intersection direct road segment, VAC - BNR protocol uses vector angle to identify whether the vehicles belong to cluster. The utility of each node in cluster is computed, and the node with highest utility is considered to transmit data. Simulation results show that VAC - BNR protocol outperforms some of the well-known protocols in terms of end- to-end delay and packet delivery ratio. Compared with AMD , average end-to-end delay of VAC - BNR protocol is reduced by 30%. When vehicular density is less than 80 vehicle/km2 , the packet delivery ratio is improved by50%.

关 键 词：车载自组织网 路由 簇群 角度矢量 桥节点 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]