Abstract
The past decade has witnessed the emergence of Vehicular Ad-hoc Networks (VANET), specializing from the well-known Mobile Ad Hoc Networks (MANET) to Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) wireless communications. While the original motivation for Vehicular Networks was to promote traffic safety, recently it has become increasingly obvious that Vehicular Networks open new vistas for Internet access, providing weather or road condition, parking availability, distributed gaming, and advertisement. In previous papers [27,28], we introduced Cooperation as a Service (CaaS); a new service-oriented solution which enables improved and new services for the road users and an optimized use of the road network through vehicle's cooperation and vehicle-to-vehicle communications. The current paper is an extension of the first ones; it describes an improved version of CaaS and provides its full implementation details and simulation results. CaaS structures the network into clusters, and uses Content Based Routing (CBR) for intra-cluster communications and DTN (Delay–and disruption-Tolerant Network) routing for inter-cluster communications. To show the feasibility of our approach, we implemented and tested CaaS using Opnet modeler software package. Simulation results prove the correctness of our protocol and indicate that CaaS achieves higher performance as compared to an Epidemic approach.
Highlights
Over the last few decades, the need for better transportation systems has grown significantly
Motivated by finding solutions to problems such as the lost of worker productivity and fuel, and the high level of CO2 emissions due to traffic congestion, the increase of the number of fatalities directly attributable to traffic-related incidents and the huge cost related to Intelligent Transportation Systems, we described in previous papers [27,28], a new service-oriented solution for Vehicular Ad-hoc Networks (VANET), referred to as Cooperation as a Service or CaaS, that extends the two novel types of Vehicular Cloud services: Network as a Service (NaaS) and Storage as a Service (SaaS) introduced in [33]
Cooperation among vehicles is the key point in our framework. This collaboration is illustrated through the novel publish/subscribe mechanism we propose for VANET; participants can act as publishers who generate information and subscribers are drivers who express their interests in a set of services and who are willing to cooperate to provide other subscribers with the information they are interested in
Summary
Over the last few decades, the need for better transportation systems has grown significantly. The number of vehicles on the road has approached critical mass [32], forcing government transportation departments across more and more countries to develop Intelligent Transportation Systems [4], which refer to broad range of diverse technologies, including information processing, sensors, communications, control, and electronics. Combining these technologies in innovative ways and integrating them into the transportation system will save lives, time and resources by simplifying data exchange between roadside infrastructure and vehicles. Such cooperative systems can greatly increase the quality and reliability of information available about the
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