车辆自组织网络中基于信道传输环境的网络连通性能

doi:10.11959/j.issn.1000-0801.2016303

电信科学 ›› 2016, Vol. 32 ›› Issue (12): 99-103.doi: 10.11959/j.issn.1000-0801.2016303

车辆自组织网络中基于信道传输环境的网络连通性能

李扬,赵海涛,唐紫浩,张玉婷

南京邮电大学通信与信息工程学院，江苏南京 210003

出版日期:2016-12-20 发布日期:2017-04-26
基金资助:
国家重点基础研究发展计划（“973”计划）基金资助项目;国家高技术研究发展计划（“863”计划）基金资助项目;国家自然科学基金资助项目;江苏省普通高校专业学位研究生实践创新计划项目

Network connectivity performance for vehicular Ad Hoc networks based on channel transmission environment

Yang LI,Haitao ZHAO,Zihao TANG,Yuting ZHANG

Institute of Telecommunications ＆ Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Online:2016-12-20 Published:2017-04-26
Supported by:
The National Basic Research Program of China（973 Program）;The National High-Tech R＆D Program （863 Program）;The National Natural Science Foundation of China;Practice Innovation Program on College Professional Degree Master of Jiangsu Province

摘要/Abstract

摘要：

车辆间的传输干扰在车辆自组织网络中是影响车辆间通信质量的一个重要因素，车辆在同时发送信号过程中会对周围车辆接收的信号产生影响，从而对网络连通性预测产生更大的挑战。根据车辆密度及交通流量，提出一种基于Nakagami的车载网络连通预测模型。该模型采用Nakagami分布特性描述信号传输过程中的衰落信道，通过接收信号功率概率密度函数及信噪比获得车辆间连通概率。仿真结果表明，在传输信号车辆比例达到饱和之前，通过提高传输信号车辆比例可以提高连通概率，但若此比例超过了饱和值则会对车辆连通产生消极的影响。

关键词: 车辆自组织网络, 连通性, 信道传输环境, Nakagami分布

Abstract:

The inter-vehicle transmission interference is one of the key factors to impact the communication performance of vehicular Ad Hoc networks. When vehicles send signals at the same time, it will inevitably have an impact on the surrounding vehicles, which has a negative effect on network connectivity prediction. According to vehicle density and traffic flow, a vehicular network connectivity prediction model was presented based on Nakagami distribution. The Nakagami distribution was used to describe the fading channel in the signal transmission process. Form expression of the inter-vehicle connectivity probability was also derived with power probability density function and signal to noise ratio of received signals.Simulation results show that connectivity probability can be well improved with larger ratio of vehicles which transmit signals before the ratio reaches the maximum.However,negative effect will take place on vehicular connectivity when the ratio exceeds the maximum value.

Key words: VANET, connectivity, channel transmission environment, Nakagami distribution

李扬,赵海涛,唐紫浩,张玉婷. 车辆自组织网络中基于信道传输环境的网络连通性能[J]. 电信科学, 2016, 32(12): 99-103.

Yang LI,Haitao ZHAO,Zihao TANG,Yuting ZHANG. Network connectivity performance for vehicular Ad Hoc networks based on channel transmission environment[J]. Telecommunications Science, 2016, 32(12): 99-103.

图/表 4

参考文献 8

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仿真参数	数值	参数意义
λ/（车辆·s^-1）	0.25,0.5,0.75	车辆到达率
l/m	1 000	高速公路长度
υ_max/（m·s^-1）	25,60	车辆最高车速
υ_min/（m·s^-1）	10,20	车辆最低车速
p_a	[0.1,1]	传输信号干扰车辆占总车辆的比例
ζ/dB	3	接收信噪比阈值
N₀/W	0.01	噪声功率
m_r	5	接收信号的衰落参数
Ω_r/W	1
m	1	干扰信号的衰落参数
Ω/W	0.1

车辆自组织网络中基于信道传输环境的网络连通性能

Network connectivity performance for vehicular Ad Hoc networks based on channel transmission environment

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