Transmission Power Control in Single-hop and Multi-hop Wireless Sensor Networks

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1 Transmission Power Control in Single-hop and Multi-hop Wireless Sensor Networks Abstract—A major challenge in wireless sensor network (WSN) deployment is to minimize sensor node’s energy consumption to prolong the lifetime of the finite-capacity batteries. Power control is one of the main techniques used to conserve energy in wireless sensor networks. In this paper we provide an efficient power control scheme for WSNs based on Telosb platform which is IEEE 802.15.4 standard compliant. Our simulation and numerical results illustrate that energy spent to transmit a packet in network system using short-range multi-hop path does not necessarily save energy as suggested by some researchers [1]. However, in a single-hop we can save energy by transmitting at lower transmission power levels while still maintaining reliable connectivity, resulting in up to 23% reduction in the total network energy consumption. Index Terms—wireless sensor network, energy efficiency, transmission power control I. INTRODUCTION Sensor networks are distributed networks made up of small sensing devices equipped with a processor, memory and the capability for short-range wireless communication. Recently, ad hoc WSNs have gained tremendous attention in research communities and commercial applications. This has been partly due to ad hoc wireless networks’ capability to establish connectivity without the need for pre-existing infrastructure, and the fact that these networks are envisioned to support a wide range of embedded applications. It is also worth mentioning that the decrease in the size and cost of sensors has also played a part in increasing the use of WSNs for applications that would not have been considered feasible previ... ... middle of paper ... ...X. Wang, “A strategy for selfconfiguring physical carrier sensing threshold in wireless sensor networks,” in Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on, 2007, pp. 2650– 2653. [17] J. Jaein, D. Culler, and O. Jae-Hyuk, “Empirical analysis of transmission power control algorithms for wireless sensor networks,” in Networked Sensing Systems, 2007. INSS ’07. Fourth International Conference on, 2007, pp. 27–34. [18] W. B. Heinzelman, “Application-specific protocol architectures for wireless networks,” Ph.D. dissertation, Massachusetts Institute of Technology, 2000, 932370 Supervisor - Anantha P. Chandrakasan Supervisor - Hari Balakrishnan. [19] “Ieee std 802.15.4, wireless medium access control (mac) and physical layer (phy) specifications for low-rate wireless personal area networks (wpans),” 2006.

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