摘要
IEEE 802.11p对于车载自组网(VANET)的应用与部署具有重要作用。针对以往研究仿真场景不全面,且极少采用完整的WAVE通信方式等不足,在深入阐述IEEE 802.11p协议层次和NCTUns架构及仿真流程的基础上,利用NCTUns平台在不同应用场景下构建出逼真道路环境,使用完整的WAVE模式分别研究了节点密度、传输功率、传输距离以及车速对于网络性能的影响。仿真结果表明:节点密度、传输功率与传输距离对于分组接收概率和吞吐量有显著影响,而车速对节点吞吐量没有影响。基于仿真结果最后提出了一种通过动态联动调整分组接收概率以及竞争窗口大小来提高车载自组网MAC层性能的方法。
The IEEE 802.11 p standard plays an important role in the application and deployment of Vehicular Ad-hoc Network （VANET）.Aiming at improving former literature＇ shortage including the incomplete use of simulation scenes and WAVE （Wireless Access in Vehicular Environments） communication mode,simulation based on NCTUns （National Chiao Tung University network simulation） was conducted to study the effect of transmission power,transmission distance,vehicle density and vehicle velocity on network performance after illustrating the architectures of IEEE 802.11p,NCTUns and the simulation process.The simulation results indicate that node density,transmission power and transmission distance can remarkably influence the packets reception rate and throughput while vehicle velocity has no effect on the node throughput.Finally a method of joint adjustment of packets reception rate and contention window was proposed to enhance the MAC （Media Access Control） performance of the VANET.
出处
《计算机应用》
CSCD
北大核心
2014年第4期945-949,共5页
journal of Computer Applications
基金
国家自然科学基金资助项目(61071100,61032003,61271172)
教育部新世纪优秀人才支持计划项目(NCET-11-1056)
四川省科技支撑计划项目(2013GZ0028,2012GZX0083)
成都市科技计划项目(12DXYB028JH-002)
关键词
车载自组网
IEEE
802
11p
性能仿真
分组接收概率
竞争窗口
Vehicular Ad-hoc NETwork （VANET）
IEEE 802.11p
performance simulation
packets reception rate
contention window
