A Probabilistic Model of File Transfer Time Based on Markov Chain in Vehicular Ad Hoc Networks

There has been increasing interest in Vehicular Ad Hoc networks (VANET). The sharing of resources among vehicles is one of the most crucial topics in VANET when two vehicles transfer files to each other for some demands. However, due to the high speed mobility of vehicles, the link between two vehicles is frequently disconnected, which makes the transmission time of files unpredictable. This paper analyzes the probability that one packet can be recieved, which is labile due to instability of the link based on the lower-layer of VANET. And we use nonhomogeneous Markov model to research aforementioned probability. The probability is obtained and confirmed by some experiments and will provide a theoretical basis for the file transfer time.