An Efficient Power Conservation Mechanism based on Novel Rolling Terrain Coverage Scheme in WSNs
| Autor: | Hsin-Hung Cho, 卓信宏 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 overage is an important issue which ensures the basic functions in wireless sensor networks (WSNs) are available, these functions are in charge of providing the communication for the emergent rescue or war environment. In order to monitor all events accurately, the sensor nodes must be disposed and survived in some place for a long time. However, the sensor nodes are relied on the battery energy that limits the lifetime of entire network. When the fewer sensor nodes are awaked in an epoch, the network lifetime is longer. This shows the solution of coverage must base on the energy efficiency issue. In order to strength the coverage ratio with limited sensor numbers, the previous researches presented some practical coverage algorithms, but those are focus on the two-dimension plane which are not suit for the real environment. Some researchers start to investigate the coverage issue in three-dimension full space. However, the real terrain is bumpy so that we cannot deploy the sensor nodes in three-dimension space without entity. In this research, we not only consider the Field of Interest (FoI) as a complex surface but also use the spline function to obtain the more realistic information of complex surface. Furthermore, we utilize the dynamic programming to optimize the sensing radius for reducing the power consumption. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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