%0 Journal Article
%A HU Xiao-yan
%A HUANGFU Wei
%A WANG Huan
%A YANG Xin-zhu
%T Modeling the Statistical Distribution of the Inter-Contact Times for Communication Opportunities in Vehicle Networks
%D 2019
%R 10.13190/j.jbupt.2018-230
%J Journal of Beijing University of Posts and Telecommunications
%P 91-97
%V 42
%N 3
%X As a kind of opportunistic networks, the vehicle network, in which vehicles communicate instantaneously with each other only when they meet opportunely, attracts more and more attentions. The inter-contact times of communication opportunities depend on the factors such as the vehicle moving model and the vehicle density. Based on the data of the taxi traces in Beijing city, an efficient method which combines the GeoHash-based filter and the trace interpolation is proposed to extract all the instants of the communication opportunities to model the statistical distribution. It is concluded that the inter-contact times obey an exponential distribution if the interval is small while a log-normal one if the interval is large. Such a piecewise heavy-tailed distribution will affect the design of the vehicle networks to some extent.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2018-230