Service differentiation using priority-based MAC protocol in MANETs. (29th September 2010)

• Record Type: Journal Article
• Authors: Sarma, Nityananda; Nandi, Sukumar
• Is Part Of: International journal of internet protocol technology. Volume 5:Number 3(2010)
• Page Start: 115
• Page End: 131
• Publication Date: 2010-09-29
• Subjects: mobile ad hoc networks -- MANETs -- quality of service -- QoS -- medium access control -- real-time traffic -- best-effort traffic -- service differentiation -- contention window selection -- queue management -- priority-based MAC -- mobile networks -- wireless networks -- Markov chain modelling -- simulation -- packet scheduling; File Transfer Protocol (Computer network protocol) -- Periodicals; Multicasting (Computer networks) -- Periodicals; 004.678
• Languages: English
• ISSNs: 1743-8209

Abstract

Multihop wireless network has emerged recently as an evolution of wireless network technology and is likely to be the integral part of future communication environment. In this context, support for quality of service (QoS) is becoming an inherent necessity, rather than an additional feature of the network. In this paper, we propose a priority-based variant of the IEEE 802.11 DCF for providing service differentiation at the MAC layer of MANETs. The channel access priorities are realised with a backoff timer selection scheme. Further, differentiating relayed traffic from self-generated traffic, improves both end-to-end QoS performance and overall network utilisation in multihop environments. A priority-based queue management and packet scheduling is implemented to improve the intra-node service differentiation. Performance analysis for single hop scenarios is done using a Markov chain model whose accuracy is validated through simulation. Furthermore, simulation studies in multihop scenarios show suitability of the proposed scheme to provide an enhanced level of service differentiation.