期刊名称：International Journal of New Computer Architectures and their Applications
印刷版ISSN：2220-9085
出版年度：2011
卷号：1
期号：3
页码：542-552
出版社：Society of Digital Information and Wireless Communications
摘要：Life safety on road is the key motivation behind the research in Vehicular Ad-hoc Network (VANET). As basic communication mechanism VANET- equipped vehicles broadcast periodic safety beacons to keep the neighboring vehicles aware of the situation at all times. Well known broadcast communication problems i.e. hidden/exposed nodes, collisions and inherent challenges in VANET e.g. dynamic environment, limited bandwidth, are prone to hinder the exchange of potentially lifesaving information. Furthermore, the most of vehicle-to-vehicle broadcast communication will comprise of single-hop periodic safety beacons thus it becomes important to measure their Quality of Service (QoS) under congested vehicular environment. With the help of extensive simulations, a detailed analysis is presented to assess the performance of single-hop periodic safety beacons. Parameters i.e. communication range, beacon generation interval and safety beacon size are effective in controlling the QoS levels. The QoS metrics used for the evaluation are packet delivery ratio, per-node throughput, end-to- end delay and Packet loss ratio breakup. Simulation results show that in congested environment it is very difficult to meet the safety application.s QoS requirements.
