Patent ID: 7881757
Filing Date: 2011-02-01
Classification: H04W,Y02D

Abstract:
1. A power management method for managing power consumption of batteries that serve as a power source for wireless nodes in an interactive wireless communication network system including a plurality of wireless nodes, the power management method comprising: a step of constructing a plurality of groups using a plurality of wireless nodes during construction of a network; a step of provisionally deciding, from among the wireless nodes in each group, a group master node serving as a group master that communicates with the other wireless nodes in the group and that functions as a communication relay station for communicating with the other groups, with the other wireless nodes in the group serving as slave nodes that are connected under the control of the group master node to perform their respective terminal station operation; a step in which the wireless nodes in each group exchange data with each other at a commencement session and calculate a minimum required transmission power for each other; a step in which the wireless nodes in each group use the calculated minimum required transmission powers to communicate with each other; a step for causing the group master node to monitor volume of communication traffic in communications with the slave nodes in the group; and a step for causing the slave node having the smallest volume of communication traffic to take over as the group master, when it is determined that the volume of communication traffic of the group master node has reached a pre-set communication traffic volume.