城市环境下车载Ad Hoc网络路由协议研究  

Research on Routing Protocol in Vehicular Ad Hoc Networks in Urban Environment

作　　者：陈鹏[1] 何涛[1] 李茁[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《无线电工程》2012年第1期4-6,23,共4页Radio Engineering

摘　　要：考虑到城市环境中障碍物对网络性能的重要影响,在NS2(Network Simulator version 2)中加入了代表障碍物的概率穿透模型,使仿真环境更接近真实环境。针对AODV(Ad hoc On-Demand Distance Vector Routing)协议应用在城市场景下的缺陷,提出了一种改进的AODV协议——GE-AODV(Geocast Enhanced AODV)协议,该协议是基于位置信息的协议,并采用了多播方式来转发控制信息。仿真表明,GE-AODV降低了网络时延和控制开销,提高了网络可靠性。Considering the significant influence of obstacles on network performance in urban environment, the probabilistic penetration model which is closer to the real scene is proposed in this paper and added into the Network Simulator version 2 （ NS2 ）. Aiming to the defects of Ad hoc On-Demand Distance Vector Routing（AODV） used in the urban scenario, we propose an enhanced AODV protocol, named as Geocast Enhanced AODV （GE-AODV）, which is based on the location information and adopts the multicasting mode to transmit the control messages. The results of related experiments show that the protocol can shorten the network delay, reduce the control overhead, and improve the reliability of network.

关 键 词：车载Ad HOC网络 概率穿透障碍物模型 AODV 

分 类 号：TP915[自动化与计算机技术]