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The Scientific World Journal
Volume 2014, Article ID 136365, 12 pages
http://dx.doi.org/10.1155/2014/136365
Research Article

Structured P2P Overlay of Mobile Brokers for Realizing Publish/Subscribe Communication in VANET

1Deptartment of Computer Science and Information Technology, Sam Higginbotom Institute of Agriculture, Technology & Sciences, Allahabad 211007, India
2Department of Computer Science and Engineering, Thapar University, Patiala 147004, India
3Department of Computer Science and Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, India

Received 23 August 2013; Accepted 7 October 2013; Published 12 January 2014

Academic Editors: F. Quaglia and J. C. R. Tseng

Copyright © 2014 Tulika Pandey et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Publish/subscribe communication paradigm provides asynchrony and decoupling, making it an elegant alternative for designing applications in distributed and dynamic environment such as vehicular ad hoc networks (VANETs). In this paradigm, the broker is the most important component that decouples other two components, namely, publisher and subscriber. Previous research efforts have either utilized the deployment of distributed brokers on stationary road side info-stations or have assigned the role of broker to any moving vehicle on ad hoc basis. In one approach, lots of preinstalled infrastructures are needed whereas, in another, the quality of service is not guaranteed due to unpredictable moving and stopping patterns of vehicles. In this paper, we present the architecture of distributed mobile brokers which are dynamically reconfigurable in the form of structured P2P overlay and act as rendezvous points for matching publications and subscriptions. We have taken city buses in urban settings to act as mobile brokers whereas other vehicles are considered to be in role of publishers and subscribers. These mobile brokers also assist in locating a vehicle for successful and timely transfer of notifications. We have performed an extensive simulation study to compare our approach with previously proposed approaches. Simulation results establish the applicability of our approach.