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

Abstract

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

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.

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References 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

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

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