The broadcast storm problem in a mobile ad hoc network
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Urban multi-hop broadcast protocol for inter-vehicle communication systems
Proceedings of the 1st ACM international workshop on Vehicular ad hoc networks
Broadcast storm mitigation techniques in vehicular ad hoc networks
IEEE Wireless Communications
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In vehicular ad hoc networks (VANETs), providing drivers with safety service such as the reliable delivery of an emergency message is a challenge. To propagate the emergency message quickly to all vehicles, the broadcasting technique can be utilized, however, the broadcasting is vulnerable to unreliability. In this paper, we therefore propose a scheme to improve the broadcast reliability by allowing nodes to overhear an ACK message. A selected node transmits an ACK message on behalf of other receiving nodes. If a node overhears an ACK message, but has not received the corresponding message, the node considers that the emergency message is lost and requests the selected node to rebroadcast the emergency message. Using ns-2 simulator, we verify that our proposed scheme provides more reliable service than other existing solutions.