Message dissemination in VANET: protocols and performances
Abstract
This chapter deals with a challenge facing wireless vehicular communication: broadcast dissemination. In fact, safety applications rely on exchanging messages disseminated to all or a selected portion of vehicles. The objective is to alert the drivers about a dangerous situation, an accident for instance. As a result, a timely disseminated warning may help the driver to avoid an emergency stop or sometimes, a collision. However, dissemination mechanisms may lead to bandwidth congestion and storm situation. This chapter presents the basic dissemination mechanisms used to avoid the famous storm problem, analyzes their performance, and discusses their pertinence and applicability.
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