RCAPChA: RSU controlled AHP-based prioritised channel allocation protocol for hybrid VANETs. (7th July 2022)

• Record Type: Journal Article
• Authors: Bhabani, Bidisha; Mahapatro, Judhistir
• Is Part Of: International journal of ad hoc and ubiquitous computing. Volume 40:Number 4(2022)
• Page Start: 250
• Page End: 266
• Publication Date: 2022-07-07
• Subjects: vehicular ad hoc network -- VANET -- channel assignment -- analytic hierarchy process -- AHP -- prioritisation -- road side unit -- RSU; Ubiquitous computing -- Periodicals; Embedded computer systems -- Periodicals; Electronic data processing -- Distributed processing -- Periodicals; Wireless communication systems -- Periodicals; Computer architecture -- Periodicals; 004.2
• Languages: English
• ISSNs: 1743-8225

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.