Title: RCAPChA: RSU controlled AHP-based prioritised channel allocation protocol for hybrid VANETs

Authors: Bidisha Bhabani; Judhistir Mahapatro

Addresses: Department of Computer Science and Engineering, National Institute of Technology, Rourkela, India ' Department of Computer Science and Engineering, National Institute of Technology, Rourkela, India

Abstract: Restricted geographical scope and bounded time relevance are two main attributes of emergency/non-emergency messages in VANETs. Therefore, a suitable medium access control (MAC) protocol is required explicitly for VANETs which can deliver timely and reliably these messages. However, channel-allocation remains a challenging problem in VANETs. In this paper, we propose an algorithm RCAPChA which minimises waiting time of the most deserving vehicle by prioritising those vehicles which want to disseminate messages. RCAPChA uses a multi-criteria-based decision-making model named as analytic hierarchy process (AHP) and enables the RSU to rank the vehicles requesting for channels based on the calculated priority values involving three criteria which includes message type, vehicle speed, and channel occupancy time. Our simulation results show that RCAPChA performs better in minimising the overall delay for 60% of the deserving vehicles. It also defeats the existing schemes regarding delay, PSR, PDR and Throughput in saturated data traffic condition.

Keywords: vehicular ad hoc network; VANET; channel assignment; analytic hierarchy process; AHP; prioritisation; road side unit; RSU.

DOI: 10.1504/IJAHUC.2022.124554

International Journal of Ad Hoc and Ubiquitous Computing, 2022 Vol.40 No.4, pp.250 - 266

Received: 08 Jan 2021
Accepted: 15 Aug 2021
Published online: 28 Jul 2022 *

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