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Vehicular Ad hoc Networks

Robust Connectivity and Security for Spectrum-agile Vehicular Ad hoc Networking:

A Vehicular Ad-hoc Network (VANET) is a special case of Mobile Ad-hoc Network (MANET) to enable exchange of information among nearby vehicles using vehicle-to-vehicle (V2V) communications and between vehicles as well as nearby roadside unit (RSU) using vehicle-to-roadside (V2R) communications. VANETs are expected to implement variety of wireless technologies to provide safety as well as comfort for passengers and to make safer and more efficient roads in the future by providing timely information to drivers and concerned authorities. Reliability and low delay are extremely important factors for VANET applications to propagate and disseminate the message toward the region of interest. Furthermore, connectivity among communicating vehicles in VANET is determined by the communication range used by vehicles. When vehicles use fixed transmission range, connectivity among vehicles could be short-lived in sparse vehicular density and broadcast storm problem in dense vehicle density. Dynamic adaptation of vehicle's transmission power/range based on local vehicle density could improve the connectivity. In V2V based vehicular communications, it is also important to check the legitimate of the received message since a given vehicle can work as a router, source and destination for the message. [Details]

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