Abstract

Vehicular Ad Hoc Network (VANET) is an instance of MANETs that establishes wireless connections between vehicles. Recently, it was shown for the case of highway traffic that position-based routing protocols can very well deal with the high mobility of network vehicles. In VANETs, these routing protocols must be adapted to vehicular-specific capabilities and requirements. As many previous works have shown, routing performance is greatly dependent on the availability and stability of wireless links. This work proposes a small extension to the Location Aided Routing (LAR) protocol specific to highway scenarios. We seek to improve the stability of path between sources and destinations by removing from the paths the nodes that move in opposite direction of the source movement. The performance metrics such as average delay of stability path between source and destination, packet delivery ratio (PDR), throughput, and normalized routing load (NRL) are measured using ns2. The Intelligent Driver Model with Lane Changing (IDM_LC) based on VanetMobiSim tool is used to generate realistic mobility traces in highway.

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