부산대학교 도서관

The wireless sensor networks (WSNs) are one of the popular information and communication technologies (ICTs) in different application areas. One of the important issue and technology in WSNs is to collect sensing data efficiently and deliver them to base station (BS) reliably. In most previous researches and proposed methodologies are using Geographic routing techniques. Based on them, the sensors have to know not only their own location coordinate, but also have the location information of one hop neighbor and the destination node. In general, the Global Positioning System (GPS) is used to provide the location and time information, but the cost is higher, power consumption is increasing, and the lifetime of whole network is reducing. Therefore, this paper proposes a Virtual Coordinate System (VCS), which starts from sink to replace GPS. With the VCS, WSNs can find the four extreme nodes in the scene boundary as virtual anchor nodes. And, a shortest path between virtual anchor nodes and sink for transfer data in the random distribution wireless sensor network is created. In the proposed approach, a routing mechanism will be established with low-power, extending lifetime, efficient and fault-tolerant.