A wireless communication system that detects a position of a node using an
appropriate position detection method. The invention is based upon a
wireless communication system provided with a plurality of nodes that
mutually communicate and a server that detects a position of the node
using communication between the nodes and is characterized in that the
node has a battery for supplying power, measures the status of the
battery, notifies the server of the measured status of the battery, the
server determines a position detection method of the node based upon the
status notified by the node of the battery and calculates a position of
the node by the determined position detection method.