摘要
在针对城市车载ad hoc网络性能的仿真实验中发现,丢包率是影响和衡量城市VANET网络性能的重要指标。为此应用ns-2工具在节点密度和速度变化两种情况下设计了仿真实验并提出了对网络丢包率和丢包因素的分析。通过研究网络中报文的所有丢弃因素与网络丢包率之间的相关性和相关程度,指出了影响城市车载ad hoc网络丢包率的本质因素,针对这些因素的进一步研究会有助于降低丢包率和优化网络性能。
In simulation experiments of city Vehicular Mobile Ad Hoc Network,it is found packet loss ratio is a main issue of network evaluation because of its influence on network performance.Thus,a simulation was designed by using ns-2 and an analysis was done on packet loss ratio and packet loss factors in two simulation scenes of variable node density and node speed.Through carefully investigating the correlation between packet loss ratio and all the factors,essential factors affecting packet loss ratio of VANET are found out,which will be very useful for the further research of reducing packet loss ratio and optimizing network performance of VANET.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第24期7943-7947,7951,共6页
Journal of System Simulation
基金
国家高科技发展计划(863计划)(2007AA01Z234)
