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A Density-Based Contention Window Control Scheme for Unicast Communications in Vehicular Ad Hoc Networks
Universitat Politecnica de Valencia, Spain.
Universitat Politecnica de Valencia, Spain.
Universitat Politecnica de Valencia, Spain.
Universitat Politecnica de Valencia, Spain.
2015 (English)In: International Journal of Ad Hoc and Ubiquitous Computing, ISSN 1743-8225, E-ISSN 1743-8233, Vol. 24, p. 65-75Article in journal (Refereed) Published
Abstract [en]

Achieving a well-designed medium access control MAC protocol is a challenging issue to improve communications efficiency due to the dynamic nature of vehicular ad hoc networks VANETs. IEEE 802.11p standard was selected as the best choice for vehicular environments considering its availability, maturity, and cost. The common problem in all IEEE 802.11 based protocols is scalability, exhibiting performance degradation in highly variable network scenarios. Experimental results for the IEEE 802.11-based MAC protocol show the importance of contention window adjustment on communications performance; however the vehicular communications community has not yet addressed this issue in unicast communication environments. This paper proposes a novel contention window control scheme for VANET environments based on estimating the network density, which is then used to dynamically adapt the CW size. Analysis and simulation results show that our proposal provides better overall performance compared with previous proposals, even in high network density scenarios.

Place, publisher, year, edition, pages
2015. Vol. 24, p. 65-75
National Category
Computer Systems
Identifiers
URN: urn:nbn:se:mdh:diva-38614DOI: 10.1504/IJAHUC.2017.080913Scopus ID: 2-s2.0-85006105687OAI: oai:DiVA.org:mdh-38614DiVA, id: diva2:1188124
Projects
SafeCOP - Safe Cooperating Cyber-Physical Systems using Wireless CommunicationAvailable from: 2018-03-06 Created: 2018-03-06 Last updated: 2018-03-06Bibliographically approved

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