A communication apparatus includes a receiving unit for receiving a first schedule signal that describes a first period in which a signal can be transmitted and a second schedule signal that describes a second period in which a plurality of communication apparatuses including the above-mentioned communication apparatus can transmit a signal even after the first period; and a transmitting unit for transmitting a transmission signal in the first period, wherein when transmission of the transmission signal is not completed in the first period, the transmitting unit transmits the transmission signal in the second period, and when the transmission of the transmission signal is completed in the first period, a breaker unit cuts off at least part of power being supplied to the receiving unit in the second period.
