Patent ID: 7916017
Filing Date: 2011-03-29
Classification: H04L,H04W,Y02D

Abstract:
1. A method for operating a wireless sensor network using a micro-controller including clusters each formed of a plurality of sensor nodes, the method comprising the steps of: a) selecting a cluster head based on residual energy amounts of the sensor nodes by increasing a probability that a sensor node with a greater amount of residual energy than the others is selected as a cluster head; b) transmitting an advertisement message from the selected cluster head to the sensor nodes to thereby form a cluster; and c) transmitting sensing data acquired in each sensor node to the cluster head, wherein the step a) includes the steps of: a-1) calculating an energy value of each sensor node based on the residual energy amount of the sensor node in comparison with an initial energy amount of the sensor node; and a-2) comparing the energy value with a random number between 0 and 1 and selecting a sensor node having an energy value greater than a random number as a cluster head.