| Summary: | 碩士 === 國立臺灣大學 === 資訊工程學研究所 === 97 === Vehicular ad hoc networks (VANETs) allow vehicles to transmit data to each other without fixed infrastructure. Multi-hop data delivery through VANETs is very unstable because of the factor of highly mobile and frequently disconnection. In a city scenario, routing problem is even more complicated because of the obstruction to the wireless radio by many buildings. Some research presents the position-based routing protocols have better adaptability in VANETs, but there are still some drawbacks, like the longer delay when the vehicle changes its direction. To address this issue, we propose a position-based routing protocol with multi-path routes. Multi-path routing increases the link stability and beneficial for detecting the movement of the vehicle. Moreover, the path selection and adjustment of our approach are adapted for the movement of vehicles in the city environment. Our simulation takes the grid structure to simplify the actual city environment. Experimental results show that our proposed protocol gets performance in average delay and average delivery ratio in the simulation environment.
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