Achieving Robust Message Dissemination in VANET: Challenges and Solutions

Being foreseen its promise of plethora of applications, Vehicle Ad hoc NETwork (VANET) has become an important research topic. Among many challenging issues, robust message dissemination is one of the indispensable requirements for various VANET applications, which affects the message delivery ratio, transmission delay and packet communication overhead. In this paper, we first systematically analyze the unique features of VANET and their implications toward robust message dissemination; a set of performance metrics suitable to measure the robust message dissemination in VANET is also defined. To achieve robust message dissemination in the unique VANET environment, we then investigate the existing relevant approaches and solutions in depth. Open issues and potential research directions are proposed wherein the addressing model, the forwarding strategy and the crossing partition schemes are profoundly studied.