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Sensors 2013, 13(3), 3951-3974; doi:10.3390/s130303951

A Transmission Power Optimization with a Minimum Node Degree for Energy-Efficient Wireless Sensor Networks with Full-Reachability

1
Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan
2
Chung-Shan Institute of Science and Technology, Zuoying 90008, Taiwan
3
School of Computer Science, Engineering and Mathematics, Flinders University, Adelaide 5068, Australia
*
Author to whom correspondence should be addressed.
Received: 30 January 2013 / Revised: 13 March 2013 / Accepted: 14 March 2013 / Published: 20 March 2013
(This article belongs to the Section Sensor Networks)
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Abstract

Transmission power optimization is the most significant factor in prolonging the lifetime and maintaining the connection quality of wireless sensor networks. Un-optimized transmission power of nodes either interferes with or fails to link neighboring nodes. The optimization of transmission power depends on the expected node degree and node distribution. In this study, an optimization approach to an energy-efficient and full reachability wireless sensor network is proposed. In the proposed approach, an adjustment model of the transmission range with a minimum node degree is proposed that focuses on topology control and optimization of the transmission range according to node degree and node density. The model adjusts the tradeoff between energy efficiency and full reachability to obtain an ideal transmission range. In addition, connectivity and reachability are used as performance indices to evaluate the connection quality of a network. The two indices are compared to demonstrate the practicability of framework through simulation results. Furthermore, the relationship between the indices under the conditions of various node degrees is analyzed to generalize the characteristics of node densities. The research results on the reliability and feasibility of the proposed approach will benefit the future real deployments.
Keywords: transmission optimization; minimum node degree; energy-efficient; full reachability networks transmission optimization; minimum node degree; energy-efficient; full reachability networks
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Chen, Y.-T.; Horng, M.-F.; Lo, C.-C.; Chu, S.-C.; Pan, J.-S.; Liao, B.-Y. A Transmission Power Optimization with a Minimum Node Degree for Energy-Efficient Wireless Sensor Networks with Full-Reachability. Sensors 2013, 13, 3951-3974.

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