Wireless communications system, terminal and base station

A terminal that communicates with a base station via an OFDM cellular wireless communications system wherein

• when said terminal receives a notification, which indicates that an interference power received by a sector is small, from said base station,
• said terminal increases a transmission signal power according to the notification when said terminal is transmitting data and
• said terminal transmits signals with a smaller transmission signal power when said terminal has not transmitted data for a predetermined period of time than when said terminal is transmitting data.

A terminal that communicates with a base station via an OFDM cellular wireless communications system wherein

• when said terminal receives a notification, which indicates that an interference power received by a sector is small, from said base station,
• said terminal increases a transmission signal power according to the notification when said terminal is transmitting data and
• said terminal transmits signals with a transmission signal power generated by decreasing the transmission signal power, which is used when said terminal is transmitting data, by a predetermined time constant when said terminal has not transmitted data for a predetermined period of time.

A terminal that communicates with a base station via an OFDM cellular wireless communications system wherein

• when said terminal receives a notification, which indicates that an interference power received by a sector is small, from said base station,
• said terminal increases a transmission signal power according to the notification when said terminal is transmitting data and
• said terminal decreases the transmission signal power by a predetermined time constant and, after that, increases the transmission signal power according to the notification when said terminal has not transmitted data for a predetermined period of time.

A base station that communicates with a terminal via an OFDM cellular wireless communications system wherein

• when said base station transmits a notification, which indicates that an interference power received by a sector is small, to said terminal,
• said base station transmits the notification to said terminal when said terminal is transmitting data and
• said base station transmits the notification as well as an instruction, which requests said terminal to transmit signals with a power smaller by a predetermined amount than a power increased according to the notification, to said terminal when said terminal has not transmitted data for a predetermined period of time.