On the type-2 fuzzy thresholding protocol for event-driven wireless sensor networks

Network lifetime is one of the most vital issues in wireless sensor network and is fundamental to any design and development effort. Extending the life time requires energy efficiency in every aspect. Besides, fuzziness, a feature of imperfect information was used to measure the distances between the sensed values. Involved with type-2 fuzzy sets, an effectively thresholding method is proposed and discussed in this study. Given an adaptive threshold value, the membership function of a sensed value is implemented, and the potential improvement gained by using our method is demonstrated by the simulated results presented.