Adaptive beacon broadcast in opportunistic routing for VANETs

Abstract

Broadcast of beacon messages including geographic coordinates, node speeds, and directions are among the most commonly used methods in routing protocols of VANETs to obtain neighboring positions. Broadcast of periodic beacon messages in fixed time intervals will reduce network performance due to increased channel load and contention. In this paper, an adaptive update strategy for sending beacon messages according to the VANETs' characteristics (position, speed, and direction) and the nature of broadcast wireless channel in an opportunistic routing strategy is studied. It is based on two rules: 1) an estimation of the lifetime of the links between vehicles' beacon messages are sent after the expiration of the estimated time to inform their local topology and 2) if the forwarding set of consecutively received data packets is changed, a beacon message is sent to maintain the accuracy of the topology. The simulation results show that the proposed strategy significantly reduces the cost of routing and improves network performance in terms of packet-delivery ratios, average end-to-end delay, and routing overhead.

DABFS: A robust routing protocol for warning messages dissemination in VANETs

“…The work in [15] proposes an Adaptive Beacon Broadcast Opportunistic Routing (ABOR) strategy that considers link life-time and predicts the link expiry time to route packets in an efficient way. The authors in [16][17][18][19] suggest the use of ant colony method for route discovery.…”

Improving the performance of opportunistic routing protocol using the evidence theory for VANETs in highways

“…The works in [13,14] also use OR, and the routing criteria in them as well as in [12] consist of a combination of three parameters. However, none of them addresses the vehicle density changes of the road and does not discriminate dense from sparse conditions.…”

A Systematic Classification of Routing In Vehicular Ad Hoc Networks

“…The approach performs well for both highway and urban scenarios. Adaptive beacon broadcast in opportunistic routing (ABOR) [82] is a beacon control strategy where periodic beaconing broadcast is carried keeping in consideration the position, speed and direction. Beaconing frequency is decided upon calculating the life time of the link between two nodes.…”