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PPT Presentation


Content Distribution and Data Retrieval in Vehicular Networks


Vehicular grids have emerged as one of the most promising application scenarios for “opportunistic” ad hoc networking. In this talk we will describe the evolution of opportunistic ad hoc networking and will present Car-Torrent and Ad-Torrent applications to car-to-car communications in the vehicular grid. We will then explore the use of vehicles as mobile sensor platforms in a “vehicular sensor grid”. Each vehicle is equipped with several types of sensors (e.g., video cameras, chemical sensors, radiation sensors, acoustic sensors, etc) and can thus collect and process sensor data. There are two major differences between the vehicle sensor grid and a conventional sensor network. The cars have a lot of storage and processing capacity, and; the cars move. This implies that cars can collect an infinitely larger amount of information than conventional sensors (e.g., video clips). Instead of disseminating it to sinks, they store and carry it on board. The problem of searching for data with given time and space attributes (e.g., who saw the accident on 3rd street Monday at 10:15AM ?) becomes then quite challenging. In the second part of this talk we will examine and evaluate two distributed index strategies to assist the search – Content Addressed Storage (CAS) - which relies on Info-stations, and; Mobility Assisted Strategy (MAS) – which is based on epidemic dissemination.


Information & Date

Broadnets 2005, Boston, MA, October. 2005


Mario Gerla