tailieunhanh - FED: FUZZY EVENT DETECTION MODEL FOR WIRELESS SENSOR NETWORKS

Event detection is one of the required services in sensor network applications such as environmental monitoring and object tracking. Composite event detection faces several first challenge is uncertainty caused by variety of factors, while the second one is heterogeneity of sensor nodes in sensing capabilities. Finally, distributed detection,which is vital to facilitate uncovering composite events in large scale sensor networks, is devised a new fuzzy event detection model which is called FED that benefits from fuzzy variables to measure the intensity as well as the occurrenceof detected events. FED uses fuzzy rules to define composite eventsto enhance handling uncertainty. Moreover, FED provides a node level. | International Journal of Wireless Mobile Networks IJWMN Vol. 3 No. 6 December 2011 FED Fuzzy Event Detection model for WIRELESS SENSOR NETWORKS HadiTabatabaee Malazi1 Kamran Zamanifar1 and Stefan Dulman2 department of Computer Eng. University of Isfahan Iran tabatabaee zamanifar @ 2Embedded Software Group Delft University of Technology The Netherlands Abstract Event detection is one of the required services in sensor network applications such as environmental monitoring and object tracking. Composite event detection faces several first challenge is uncertainty caused by variety of factors while the second one is heterogeneity of sensor nodes in sensing capabilities. Finally distributed detection which is vital to facilitate uncovering composite events in large scale sensor networks is devised a new fuzzy event detection model which is called FED that benefits from fuzzy variables to measure the intensity as well as the occurrenceof detected events. FED uses fuzzy rules to define composite eventsto enhance handling uncertainty. Moreover FED provides a node level knowledge abstraction which offers flexibility in applying heterogeneous sensors. The model is also applicable to a clustered network for distributed event detection. The simulation results show that FED is less sensitive to environmental noise and performs better in terms of percentage of detected eventscompare to a similar approach. Keywords Wireless sensor networks Composite event detection Fuzzy event detection FED Heterogeneity Uncertainty 1. Introduction Event detection is a popular service in environmental monitoring 1 - 3 and object tracking 4 medical monitoring 5 vehicle tracking 6 7 and military surveillance 8 are some sample applicationsthat event detection plays a key role. The popularity of this service is not limited to the applicationlayer. Several wireless senor network middlewares 9 - 14 provide the .

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