METHOD FOR DETECTING EVENTS OF SENSOR NETWORK WITH IMPROVED RELIABILITY AND SENSOR NETWORK SYSTEM USING SAME

摘要

The present invention relates to a method for detecting hierarchical events of a sensor network having a plurality of sensor nodes capable of increasing reliability by verifying sensor signals in consideration of both spatial relation and time relation of sensor signals, and increasing transmission efficiency by directly transmitting only a sensor signal with the verified spatial relation and time relation through a sink node. The method for detecting hierarchical events of a sensor network having a plurality of sensor nodes according to the present invention comprises: a step of, by each sensor node, generating a Markov random field model based on neighboring sensor nodes satisfied with Markov properties for the sensor node; a step of estimating each first predetermination value based on a sensor signal with regard to the event; a step of estimating each spatial determination value of the sensor node based on the first determination values of the sensor nodes in the Markov random field model; and a step of estimating a final determination value of the sensor node in each of the sensor nodes in which the spatial determination value is determined as the detection of the event based on the Markov chain.;COPYRIGHT KIPO 2016