Abstract
The core concern in vehicular ad hoc networks (VANETs) is the reliable transfer of safety-related
messages to all endangered vehicles on the road. The recent discovery of the presence of
transmission holes in the VANET communication range poses a serious challenge in the
safety-message propagation. In this work, a technique for recovering the safety message for
vehicles located in the transmission holes is proposed. Each vehicle that successfully receives
the safety message actively estimates propagation loss for its immediate neighbors. If the
receiving vehicle determines one of its neighbors being located in a coverage hole, the safety
message is rebroadcast by the receiving vehicle. The propagation-loss estimation makes use
of the topology information appended in the periodic beaconing messages. The proposed
technique is evaluated in the ns-3 simulator. The simulation results suggest that the proposed
technique improves the overall message-dissemination reliability over the existing techniques.
Faisal Khan, Farhan Elahi, Kamran Ali, Sadique Ahmed Bugti, Ehsanulla Kakar. (2012) Recovering VANET Safety Message in Transmission Holes, Journal of Applied and Emerging Sciences, Volume 3, Issue 2.
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