Patent ID: 8160589

Claim:
A base station equipment that communicates with a wireless terminal, comprising: a timer; a transmitter that transmits information indicating that the base station equipment is ready to communicate with the wireless terminal; a receiver for receiving a signal; and a control unit which: determines whether or not a power value of a signal transmitted from the wireless terminal to other base station equipment different from the base station equipment, but received from the wireless terminal via the receiver, is greater than a predetermined threshold value; controls the receiver and the transmitter so as to transfer between a sleep mode where the transmitter stops operation and the receiver operates and an active mode where both of the transmitter and the receiver operate; judges that the wireless terminal exists near the base station and switches to the active mode when the amount of power of the signal which is transmitted from the wireless terminal to other base station equipment different from the base station equipment, is larger than the predetermined threshold value; starts transmission of a control signal from the transmitter to provoke communication with the wireless terminal, and operates the timer; and stops the control signal transmitted from the transmitter when communication is not started even after a predetermined period of time.