To provide suppressing loss of sensing data while suppressing current consumption at a sensor node, a sensor node is started at a predetermined interval, a sensor measures data (P143), the measurement data is sent to a base station (P144), a state of wireless communication with the base station is determined...http://www.google.com/patents/US20070159321?utm_source=gb-gplus-sharePatent US20070159321 - Sensor node, base station, sensor network and sensing data transmission method
