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publish/subscribe based information dissemination over VANET utilizing DHT

Frontiers of Computer Science 2012年第6期6卷 713-724页

作者： Tulika PANDEY Deepak GARG Manoj Madhav GORE Department of Computer Science and IT Sam Higginbotom Institute of AgricultureTechnology and SciencesAllahabad 211007India Department of Computer Science and Engineering Thapar UniversityPatiala 147004India Department of Computer Science and Engineering Motilal Nehru National Institute of TechnologyAllahabad 211004India

A vehicular ad-hoc network （VANET） can be visualized as a network of moving vehicles communicating in an asynchronous and autonomous fashion. Efficient and scalable information dissemination in VANET applications is a major challenge due to the movement of vehicles which causes unpredictable changes in network topology. The publish/subscribe communication paradigm provides decoupling in time, space, and synchronization between communicating entities, and presents itself as an elegant solution for information dissemination for VANET like environments. In this paper, we propose our approach for information dissemination which utilizes publish/subscribe and distributed hash table （DHT） based overlay networks. In our approach, we assume a hybrid VANET consisting of stationary info-stations and moving vehicles. These info-stations are installed at every major intersection of the city and vehicles can take the role of publisher, subscriber, or broker depending upon the context. The info-stations form a DHT based broker overlay among themselves and act as rendezvous points for related publications and subscriptions. Further, info-stations also assist in locating vehicles that have subscribed to information items. We consider different possible deployments of this hybrid VANET with respect to the number of info-stations and their physical connectivity with each other. We perform simulations to assess the performance of our approach in these different deployment scenarios and discuss their applicability in urban and semi-urban areas.

关键词： vehicular ad-hoc network (VANET) peer-to- peer overlay network publish/subscribe communication paradigm distributed hash table (DHT)

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