摘要
车辆自组织网络(vehicular ad hoc networks,VANET)是智能交通领域的研究热点。辅助基站的部署是提高VANET通信性能的一个关键。研究了基于辅助基站优化的网络编码传输性能问题,分析了VANET中保持网络连通性需要的辅助基站数目问题,在此基础之上,提出了一种基于粒子群优化理论的辅助基站位置优化算法,进一步通过NS2仿真对比分析了优化前后采用随机线性网络编码作为传输协议的VANET的传输性能。结果表明,辅助基站优化对基于网络编码的VANET通信性能具有较大的影响,在提高网络投递率的同时,降低了平均传输时延。
Vehicular Ad hoc Networks（VANET）is a hot spot of intelligent transportation researches,and auxiliary base stations deployment is one of the key issues to improve the communication performance of VANET.This paper first analyzes the number of auxiliary base stations to keep the network connectivity.An auxiliary base station optimization method is proposed based on PSO algorithm.Finally,the transmission performances of the routing protocol with random linear network coding before and after the auxiliary base station optimization are analyzed by NS2.The simulation results show the auxiliary base station optimization greatly affects the VANET transmission performances based on network coding,and it can enhance the delivery rate as well as reduce the average delay of transmission.
出处
《重庆邮电大学学报（自然科学版）》
北大核心
2012年第5期544-547,共4页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
