期刊
INTERNATIONAL JOURNAL OF AUTOMATION AND COMPUTING
卷 9, 期 4, 页码 378-387出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11633-012-0658-9
关键词
Broadcast storm; opportunistic broadcast; multiple candidates; transmission speed; vehicular ad hoc network (VANET)
资金
- National Natural Science Foundation of China [61070043]
A primary goal of broadcasting in vehicular ad hoc network (VANET) is to improve the road safety by transmitting alert messages to all surrounding vehicles as soon as possible. In this paper, we adopt the concept of opportunistic routing and propose a multiple candidate relays opportunistic broadcast (MCROB) protocol for VANET. The MCROB protocol is a sender-driven broadcast scheme independent of node density. The packet delivery ratio (PDR) is derived and an expected transmission speed (ETS) for the MCROB is proposed. A priority rule for selecting a proper candidate relay and an adaptive algorithm for forwarding timers of candidate relays are also presented in this paper. Simulations show that MCROB is adaptive to the rapid changing of network conditions. It keeps a low communication overhead introduced by the broadcast and increases the average transmission speed by around 40%.
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