1. 1 Overview VANET: Vehicular ad Hoc network Aim to compose vehicular self-organizing network for intelligent transportation system (ITs) Flexible rapid organization and no limitation of service provider and communication expense Application: traffic announce, P2P communication, collision warning, military uses, other communication1.1 Overview ◼ VANET: Vehicular Ad Hoc Network ◼ Aim to compose vehicular self-organizing network for intelligent transportation system (ITS). ◼ Flexible rapid organization and no limitation of service provider and communication expense ◼ Application: traffic announce, P2P communication, collision warning, military uses, other communication