| 摘要 |
PURPOSE:To minimize the rising period and to prevent wear in the battery by providing plural consecutive periods when specific information is sent and turning on the power supply for the periods. CONSTITUTION:A message is sent from a base station 1 to a slave station 7 through the use of frame structure and a reception section of the slave station 7 receives the said message. A control section 15 is provided, which turns on a power supply 17 to be supplied to the reception section 9 for a period when specific information is sent from the base station 1. The slave station 7 receives the message corresponding to the specific information and turns on the power supply supplied to the reception section 9 of the slave station 7 for a period when the said message is sent to allow the reception section to be in standby of the transmission of the specific information at all times. The periods when the specific information is sent are provided consecutively to suppress the power consumption consumed at the time of rising the reception section 9 thereby attaining long service life of the battery. |
