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Efficient Information Dissemination in Vehicular Networks with Topological Approach

Owing to their ability to provide endless services such as entertainment, adaptive route selection, etc., Vehicular ad hoc networks (VANETs) have received a great deal of interest from both academia and industry in recent years. Vehicles communicate with other vehicles in VANETs and with fixed data transmission infrastructures. Vehicles in VANETs serve as intelligent sensing devices with communication and computing capabilities built in them with Application Unit (AU), and On-Board Unit (OBU). These units can be used in a wide range of applications including warning generation, community services, traffic management, and so on, and can also provide on-board passengers with security, protection, and comfort. As vehicle communications are widely used, there may be congestion in the network and the quality of service may be compromised. That also results in a deterioration of performance in data dissemination. Since its inception, a variety of research initiatives have been carried out for effective data dissemination. Most of the existing data dissemination solution in VANETs could not provide a comprehensive scheme that would meet the parameters of Quality of Service (QoS). Moreover, the existing schemes were unable to provide reliable communication and the broadcast storm problem was not been solved completely. Hence, there was a need of a new solution that meets the desired QoS parameters and ensures reliable communication. It is also necessary that the messages sent are authenticated and delivered to the vehicles in the relevant areas quickly. In this chapter, we present an efficient protocol for fast dissemination of authenticated messages in VANETs. It ensures the anonymity of the senders and also provides mechanism for law enforcement agencies to trace the messages to the senders, when necessary.