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A grid-based distributed event detection scheme for wireless sensor networks.
1Department of Computer Engineering, Hongik University, Seoul 121-791, Korea. kresource@naver.com
Sensors (Basel, Switzerland)
|February 21, 2012
Summary
This study introduces a grid-based distributed event detection scheme for wireless sensor networks (WSNs). The novel approach enhances detection accuracy and reduces false alarms by dividing grids into sub-grids for improved event localization.
Area of Science:
- Computer Science
- Electrical Engineering
- Network Engineering
Background:
- Wireless sensor networks (WSNs) face challenges in accurately detecting small events due to grid-based limitations.
- Existing methods struggle with event detection performance when the event region is smaller than the grid size.
Purpose of the Study:
- To propose an enhanced grid-based distributed event detection scheme for WSNs.
- To improve event detection accuracy and minimize false alarms in WSNs.
Main Methods:
- The proposed scheme divides each grid into 2x2 sub-grids.
- Event detection decisions are made by identifying a 2x2 sub-grid region exceeding a threshold, utilizing inter-cluster communication among cluster heads.
- A dynamic threshold adjustment mechanism is incorporated.
Main Results:
- The scheme achieves high event detection accuracy.
- A low false alarm rate is maintained.
- The method effectively filters transient faults and isolates permanent node faults.
Conclusions:
- The enhanced grid-based distributed scheme significantly improves event detection in WSNs.
- The approach offers a robust solution for accurate and reliable event detection, even with small event regions.
- Dynamic thresholding and sub-grid division contribute to superior performance and fault tolerance.