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URN etd-0628106-134212 Statistics This thesis had been viewed 2823 times. Download 2385 times. Author Yu-Chee Lee Author's Email Address email@example.com Department Information Management Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 41 Title 在無線感測網路中定位方法之設計 Keyword localization sensor sensor network sensor network sensor localization Abstract Localization is an important topic in wireless sensor networks because sensor nodes are randomly scattered over a region and they get connected into network on their own. Many localization algorithms have been proposed. These localization protocols can be divided into two categories: range-based and range-free. The range-based techniques use distance estimates or angle estimates to achieve fine accuracy with expensive specific hardware. In the other hand, the range-free mechanisms depend on the contents of received message to support coarse accuracy. In this thesis, we present a lightweight range-free localization scheme using mobile anchor nodes. The anchor node equipped with GPS broadcasts its coordinates to the sensor nodes as it moves through the network. As the sensor nodes collect enough beacons, they are able to calculate their locations locally. Simulation results show that the proposed scheme achieves best performance in percentage of localized sensor nodes without many mobile anchors. Advisor Committee Wen-Hwa Liao - advisor
Kuei-Ping Shih - co-chair
Patrick S. Chen - co-chair
Files Date of Defense 2006-06-20 Date of Submission 2006-06-28