An effective back-off selection technique for reliable beacon reception in VANETs

Shah, Syed Adeel Ali and Ahmed, Ejaz and Qureshi, Muhammad Ahsan and Jan, Sadeeq and Noor, Rafidah Md (2019) An effective back-off selection technique for reliable beacon reception in VANETs. International Journal of Communication Systems, 32 (13). e4019. ISSN 1074-5351

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Official URL: https://doi.org/10.1002/dac.4019

Abstract

In safety-critical scenarios, reliable reception of beacons transmitted by a subject vehicle is critical to avoid vehicle collision. According to the employed contention window sizes in IEEE 802.11p, beacons are transmitted with a small contention window size. As a result, multiple vehicles contend for the shared channel access by selecting the same back-off slot. This is a perfect recipe for synchronous collisions wherein reliable beacon delivery cannot be guaranteed for any vehicle. We consider the problem of selecting the back-off slots from the current contention window to provide reliable delivery of beacons transmitted by a subject vehicle to its neighbors. Given a safety scenario, we propose a Pseudo-Random Number Generator (PRNG)-inspired back-off selection (PBS) technique. The proposed technique works on the hypothesis that synchronous collisions of beacons transmitted by a subject vehicle can be reduced if all its neighbors select different back-off slots (ie, not the back-off slot selected by the subject vehicle). The discrete-event simulations demonstrate that PBS can increase the overall message reception from a subject vehicle, in comparison with the uniform random probability back-off selection in IEEE 802.11p. © 2019 John Wiley & Sons, Ltd.

Item Type: Article
Uncontrolled Keywords: back-off selection; contention window; reliability; synchronous collisions; vehicular ad hoc networks
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Computer Science & Information Technology
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Jan 2020 06:39
Last Modified: 20 Jan 2020 06:39
URI: http://eprints.um.edu.my/id/eprint/23487

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