Context aware architecture for sending adaptive HELLO messages in VANET

Abstract

With vehicular Ad hoc Network (VANET) being considered a vital application of Mobile ad hoc Network (MANET), this paper will focus on exploiting the aspect of context aware system to leverage the efficiency of routing protocols in VANET. Our investigation will concentrate on the vehicle to vehicle (V2V) communication type rather than the vehicle to Infrastructures (V2I) type, owing to the lack of infrastructures and difficulties involved in providing a comprehensive covering for all roads because of the high expense of installation. Many challenges (e.g. routing issues and security) have emerged in this area, encouraging many researchers to investigate their research in attempting to meet these challenges. Routing protocols are considered as one of the critical dilemmas that need to be tackled; designing an efficient routing mechanism has an impact on enhancing the network performance in terms of disseminating messages to its desired destination. Thus we concentrate in this paper on dealing with the routing issues particularly in minimising overhead and bandwidth consumptions, which in turn will lead to effects on the time delay of packet dissemination. To do this, we introduce a novel technique and architecture that organises the broadcast process of HELLO beacon message by sending these messages according to the circumstances of each vehicle in the network, for instance changing a vehicle's direction and exceeding a predefined range of speed, which has an impact on changing the network topology in the road.