This paper addresses the following relay sensor placement problem: given the set of duty sensors in the plane and the upper bound of the transmission range, compute the minimum number of relay sensors such that the induced topology by all sensors is globally connected. This problem is motivated by practically considering the tradeoff among performance, lifetime, and cost when designing sensor networks. In our study, this problem is modelled by a NP-hard network optimization problem named Steiner Minimum Tree with Minimum number of Steiner Points and bounded edge length (SMT-MSP). In this paper, we propose two approximate algorithms, and conduct detailed performance analysis. The first algorithm has a performance ratio of 3 and the second has a performance ratio of 2.5.
KeywordsWireless sensor networks Relay sensor Steiner point SMT-MSP Topology control
Unable to display preview. Download preview PDF.
- 1.E.S. Biagioni and G. Sasaki, Wireless sensor placement for reliable and efficient data collection, IEEE HICSS’03, Big Island, Hawaii (2003).Google Scholar
- 4.D. Estrin, L. Girod, G. Pottie and M. Srivastava, Instrumenting the world with wireless sensor networks, in: Proceedings of International Conference on Acoustics, Speech, and Signal Processing 4 (2001) pp. 2033–2036.Google Scholar
- 10.R. Min, M. Bhardwaj, S.-H. Choi, N. Ickes, E. Shih, A. Sinha, A. Wang and A. Chandrakasan, Energy-centric enabling technologies for wireless sensor networks, IEEE Wireless Communications (August 2002) pp. 28–39.Google Scholar
- 11.G.J. Pottie, Wireless sensor networks, Information Theory Workshop (1998) pp. 139–140.Google Scholar
- 15.R. Ramanathan and R. Rosales-Hain, Topology control of multihop wireless networks using transmit power adjustment, INFOCOM 2000, 2 (2000) pp. 404–413.Google Scholar
- 18.R. Wattenhofer, L. Li, P. Bahl and Y.-M. Wang, Distributed topology control for power efficient operation in multihop wireless ad hoc networks, INFOCOM 2001, 3 (2001) pp. 1388–1397.Google Scholar
- 19.N. Xu, A Survey of Sensor Network Applications, http://enl.usc.edu/~ningxu/papers/survey.pdf.