Authors: KuoLung Wang TsanPin Wang ChienChao Tseng
Publish Date: 2013/06/08
Volume: 73, Issue: 3, Pages: 1049-1065
Abstract
In recent years the IEEE 80211p/1609 wireless access in vehicular environments standards adopt the dedicated shortrange communications multichannel architecture for vehicular wireless networks To utilize the multichannel architecture each vehicle equipped with two sets of transceivers can operate concurrently on three different channels For example in clusterbased multichannel schemes a cluster head vehicle coordinates and assigns an appropriate channel to its cluster members However these schemes are unsuitable for a single channel device performing on only one RF channel at a time which would waste channel resource and increase time to allocate a channel Another approach called LEACHbased scheme selects channels randomly and ensures that each channel is selected once within a round in each vehicle However this leads to a situation that different vehicles might select the same channel in shortterm duration In this paper we propose a multichannel selection scheme called minimum duration counter MDC scheme which could apply to a single channel device while utilizing the multichannel architecture of an 80211p/1609 network In addition we compare the MDC scheme with pure random PR and LEACHbased schemes in terms of fairness index FI and utilization to emphasize the fairness and to balance the traffic of multichannel usage Furthermore we analyze the counter overflow probability distribution and propose solutions to the MDC scheme Numerical results show that our scheme outperforms the PR and LEACHbased schemes in terms of multichannel usage traffic balancing and fairness
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