Author(s): Chunxiao Li, Jun Sun, Jing Yang, Dawei He, Jun Wu, Mei Sun
Abstract: Vehicle Ad hoc Networks (VANETs) with a large number of roadside and vehicle on board devices can provide various services for users. To improve the road safety services, the emergency message generated by safety-related devices which are closest to the dangerous spot should be propagated to the other nearby vehicles immediately when road traffic accidents or dangers are detected. As road safety is a time-criticality problem, so choosing a suitable next-hop is very important for in time message propagation under unicast situations. To address this, this paper presents a next-hop selection scheme in VANETs for propagating and relaying emergency message. A fuzzy logic time-distance headway based next-hop selection scheme is proposed, which has considered the influences of the following three factors: distance headway factor, time headway factor and signal strength factor. Compared with the conventional next-hop selection schemes, the number of informed vehicles and the probability to inform a vehicle both have much better performances than the conventional schemes. Therefore, the proposed next-hop selection scheme for propagating emergency message from the safety-related devices can be used to keep road safety by avoiding unnecessary road collisions.
Keywords: Fuzzy logic time-distance headway, next-hop, emergency message, road safety
Pages: 72-81WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 15, 2016, Art. #9