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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 919815, 9 pages
http://dx.doi.org/10.1155/2012/919815
Research Article

A Point-to-Point Interference Measurement Approach for Large-Scale Wireless Sensor Networks

1College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China
2Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China

Received 19 March 2012; Revised 15 August 2012; Accepted 3 September 2012

Academic Editor: Tian He

Copyright © 2012 Bo Zeng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Interference measurement is an important part for use in links scheduling protocol in wireless sensor networks (WSNs). To know wireless interference among nodes in the network is essential to guarantee the efficiency of links scheduling protocol. This work presents a point-to-point interference measurement approach based on time division technique for large-scale low-power WSNs. We first propose an optimized time-slots assignment to reduce the time-slot requirement of interference measurement for large-scale WSNs.We then mitigate the problem of communication by using a subtree-based information distribution method. The accuracy of interference measurement is controlled by a control factor that can be specified by user based on the application requirement to achieve a tradeoff between the overhead of measuring interference and measurement accuracy. Our simulation results indicate that our approach has low-energy and-communication overhead when compared with baseline.