Relay Sensor Placement in Wireless Sensor Networks
2002-01-22
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Relay Sensor Placement in Wireless Sensor Networks
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2002-01-22
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In this paper, we propose a novel idea of maintaining connectivity by introducing relay sensors in a wireless sensor network. We restrict our consideration to a very important class of wireless sensor networks such as biomedical sensor networks, in which the locations of the sensors are fixed and the placement can be pre-determined. We formulate our problem to the NP-hard network optimization problem named Steiner Minimum Tree with Minimum number of Steiner Points (SMT-MSP) and present two approximate solutions. Meanwhile, we study the topology improvement in a wireless sensor network when relay sensors are introduced. In other words, we restrict transmission power of each sensor to a small value and use relay sensors to guarantee connectivity. The performance parameters under consideration are $P$, the total per node minimum power needed to maintain connectivity, and $D$, the maximum degree in the minimum power topology (maintained by $P$).Simulation study shows that with the introduction of relay sensors, we achieve better performance, especially for sparse topology.
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Cheng, Xiuzhen; Du, Ding-Zhu; Wang, Lusheng; Xu, Baogang. (2002). Relay Sensor Placement in Wireless Sensor Networks. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/215508.
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