Beacon broadcast is an essential mechanism to improve the awareness of driving situations by broadcasting vehicle kinematics to its neighbor vehicles at a regular rate. However, the current design of beacon broadcast does not fulfill the awareness requirement of many emerging safety-critical applications. In this paper, we present the mobility-adaptive beacon broadcast (MAB2) scheme for guaranteed tracking of degree (GTD) $K$ . In the GTD $K$ , a neighbor vehicle can estimate the position of the sending vehicle within a fixed threshold, given that the former receives at least one of the $K$ latest beacons of the latter. To aim this, we characterize the feasible kinematics of the sending vehicle in the subsequent time, address how the MAB2 scheme defers a new beacon broadcast as long as the tracking condition meets, and present several rigorous proofs on the correctness and optimality of the MAB2 scheme. Numerical results show that the MAB2 scheme achieves an outstanding GTD- $K$ tracking performance, in terms of the timeliness of beacon broadcast, the reliability of vehicle tracking, and the tracking accuracy, while minimizing the DSRC CCH congestion.
Mobility-Adaptive Beacon Broadcast for Vehicular Cooperative Safety-Critical Applications
IEEE Transactions on Intelligent Transportation Systems ; 19 , 6 ; 1996-2010
01.06.2018
2238520 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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