Abstract
Cooperative vehicular safety systems are expected to revolutionize the driving experience by providing road safety applications based on incident detection. Two vital quality parameters for cooperative safety applications are the position accuracy and communication reliability of the status information. The receiver may take erroneous decisions if the received data does not correspond to the latest situation of the transmitter (e.g., position, velocity, and trajectory of the target vehicle). In this paper, we propose and evaluate a POSition-ACCuracy (POSACC) based adaptive beaconing algorithm for cooperative vehicular safety systems. POSACC integrates three different control mechanisms to guarantee specific performance metrics. It adopts the position accuracy and communication reliability as the highest priority metrics, due to their direct impact on the vehicle's systems capability to avoid potential traffic accidents in real-time. In addition, it guarantees the priority metrics, maintaining the vehicle's warning distance, channel load, and end-to-end latency into the operative range of cooperative safety applications. POSACC is compared with three different state-of-the-art adaptive beaconing algorithms; ETSI DMG, LIMERIC, and DC-BTR&P. Extensive evaluation results show that POSACC successfully controls the beacon rate, transmission power, and the size of the minimum contention window. Simulation results also demonstrate that POSACC is more effective than the benchmark algorithms by guaranteeing the operational requirements of cooperative safety applications in a wider range of traffic situations.
Highlights
Cooperative vehicular safety systems are being designed to provide accident-free and efficient road systems [1]
Cooperative safety applications aim to detect potential crashes on the road and to notify vehicles in advance. The communication on these systems relies on the IEEE 802.11p [2] radio access technology in the 5.9 GHz frequency band, which specifies the mediumaccess-control (MAC) and physical (PHY) layers of Wireless Access in Vehicular Environments (WAVE) [3]
POSACC integrates the control mechanisms described above to provide the position accuracy and communication reliability required by cooperative safety applications
Summary
Cooperative vehicular safety systems are being designed to provide accident-free and efficient road systems [1]. The responsibility for meeting the requirements of a specific performance metric in the worst-case scenario (more demanding applications) can lead to not meeting the requirements of these and other applications in other metrics In this context, we propose a novel POSition-ACCuracy (POSACC) based adaptive beaconing algorithm for cooperative vehicular safety systems. We propose a novel POSition-ACCuracy (POSACC) based adaptive beaconing algorithm for cooperative vehicular safety systems It aims to satisfy the operational requirements of cooperative safety applications. Simulation results demonstrate that POSACC is more effective than three state-of-the art algorithms: ETSI DMG [7], LIMERIC [15], and DC-BTR&P [26], by adapting to the vehicle dynamics as well as guaranteeing the operational requirements of cooperative safety applications in a wider range of traffic situations.
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