Patent ID: 8817677
Filing Date: 2014-08-26
Classification: H02J,H04W,Y02B,Y02D,Y04S

Abstract:
1. A communication device for transmitting and receiving data to and from a communication terminal device by transmitting a signal during a transmission period for establishing transmission and reception of the data to the communication terminal device when the communication terminal device, which alternately switches between an active state and a sleep state, is switched to the active state, the active state being triggered by receipt of the signal and is a state in which communication is possible, and the sleep state being a state in which communication is not possible, the communication device comprising: a power saving control unit configured to control the transmission period used for transmitting the signal used for switching the communication terminal device from the sleep state to the active state in such a manner that the transmission period during which the signal is transmitted is increased as a power value difference increases, the power value difference being a value obtained by subtracting a total power consumption value of a power consumption appliance including the communication terminal device from an available power supply value for power available to the power consumption appliance; and a communication interface unit configured to transmit the signal containing information indicating the transmission period to the communication terminal device so as to set the communication terminal device in the active state with a period according to the transmission period determined by the power saving control unit.