VANET路由协议设计时的网络容量仿真分析  

Network Capacity Simulation in Design of VANET Routing Protocol

作　　者：谭方勇[1] 方立刚[1] 金志峰 

机构地区：[1]苏州市职业大学计算机工程学院,江苏苏州215104 [2]吴江区公安局科信大队,江苏苏州215200

出　　处：《通信技术》2015年第3期325-329,共5页Communications Technology

基　　金：国家自然科学基金(No.41201338);江苏省自然科学基金(No.BK2012164);苏州市科技计划项目(No.SGZ2014011);苏州市高技能人才培养研发市级重点课题(No.GJNZ201412)~~

摘　　要：针对车载自组网中节点移动速度快、拓扑变化频繁以及无线信道质量不稳定的特点,提出了此类网络的路由协议必须综合考虑业务需求、网络能力以及自组网本身的特点等因素的设计思想。分析了承载业务分为低速率的导频信道和高速率的业务信道对传输速率的不同要求,研究了在选择路由协议时的网络容量上、下限问题。仿真实验结果表明,节点的可行吞吐量的上下限将随着无线电波衰减系数和节点带宽的增大而增大。在车载自组网路由协议设计时需要考虑这种关系,从而提高节点的可行吞吐量。Aiming at VANET（ Vehicular Ad-hoc Networks）characteristics of fast moving nodes,frequently varying topological structures and instable wireless channel quality,this paper proposes a design idea that the factors such as business demands,network abilities and VANET features should be considered comprehensively in the design of VANET routing protocol.Various demands of transmission rate for loading business low-rate pilot channel and high-rate traffic channel are analyzed,and meanwhile the upper and lower bounds of network capacity in choosing routing protocol are explored.Simulation results show that the practical bound of the node throughput increases with the growth of radio waves attenuation coefficient and node bandwidth.This situation should be considered in the design of the VANET routing protocols,so as to improve the viable throughput of the nodes.

关 键 词：车载自组网 无线自组网 网络容量 路由协议 可行吞吐量 高速率 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]