COMMUNICATION TERMINAL, AND COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To provide a communication terminal transmitting/receiving data at optional timing and saving power when communication is not executed as there is a problem wherein, when executing relay of data transmission such as multi-hop communication, data is not transmitted at optional timing when a relay terminal is always started because when the data are received is not known or the relay terminal is intermittently operated for power saving. SOLUTION: This communication terminal includes: a starting means to receive a start request signal from a first terminal, and extracts, rectifies and compares a signal of a predetermined frequency by a resonance circuit to output a start instruction signal; a terminal control means to transit from a sleep state to a start state by the start instruction signal to control data processing and a terminal; and a data communication means to transit from a sleep state to a start state via the terminal control means or directly by the start instruction signal, and receive data from the first terminal to transmit the data to a second terminal. COPYRIGHT: (C)2011,JPO&INPIT