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A Robust Scheme for Emergency Message Delivery in Vehicle Communications on Freeway  

Park, Jeong-Seo (단국대학교 컴퓨터학과)
Park, Tae-Keun (단국대학교 멀티미디어공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.12A, 2010 , pp. 1113-1121 More about this Journal
Abstract
The Vehicle Safety Communications (VSC) is one of VANET applications for preventing vehicle accidents, and it utilizes vehicle-to-vehicle communication to exchange emergency messages. To propagate such messages in VSC, several schemes based on selective flooding have been proposed. Their common idea is that an emergency message is relayed by one of vehicles receiving the message. However, the schemes do not consider the transmission errors and duplications of an emergency event. In the schemes, if there are transmission errors and a vehicle detects a hazard, there may be vehicles which fail to receive an emergency message. If k vehicles detect a hazard, k emergency messages are created and propagated. The duplications of an event increase reliability of the message delivery but decrease efficiency. In this paper, we propose an emergency message delivery scheme which is efficient and robust to transmission errors. Our proposed scheme utilizes clustering for massage aggregation and retransmissions in a cluster. It also uses an acknowledgment mechanism for reliable inter-cluster communication. Our simulation results show that the proposed scheme outperforms Least Common Neighbor Flooding which is one of the selective flooding schemes.
Keywords
VSC; Emergency; VANET; Cluster; Acknowledgement;
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Times Cited By KSCI : 1  (Citation Analysis)
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