| Summary |
An inter-vehicle communication system is one of the most promising applications of a mobile ad hoc network (MANET) , which is called a vehicular ad hoc network (VANET). One of the important issues in VANET is scalability. A routing protocol using the position information may alleviate the issues of scalability or control overhead, compared with topology-based routing protocols. The car navigation system using global positioning system (GPS) is spread remarkably, and position-based routing is a useful approach in VANET. A next-hop forwarding method is a kind of position-based routing protocols. In the next-hop forwarding method, a selection scheme of the next-hop node is very important. In this paper, we propose a novel selection scheme of next-hop node for the next-hop forwarding method in VANET. In the proposed scheme, a new link metric, expected progress distance (EPD), is introduced so as to consider both forwarding distance and transmission quality of wireless link. We evaluate the performance of our proposed scheme and show that our proposed scheme can achieve much higher throughput and better packet delivery ratio than the conventional schemes. |
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