Mobile communication system, base station controller, base station, mobile station, and base station radio parameter control method

A mobile communication system, comprising:

• a condition reporting unit provided in a base station controller, which is an upper node of a target base station, and configured to report to a mobile station via the target base station or another base station a measurement condition and a report condition used by the mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from the target base station;
• a measurement reporting unit provided in the mobile station and configured to measure the reception quality level of the radio signal transmitted from the target base station if the measurement condition is satisfied and to report the measured reception quality level to the target base station directly or via the other base station and the base station controller if the report condition is satisfied;
• and
• a radio parameter control unit provided in the target base station and configured to control a radio parameter of the target base station or the other base station based on the reported reception quality level.

A base station controller, comprising:

• a condition reporting unit configured to report to a mobile station via a target base station or another base station a measurement condition and a report condition used by the mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from the target base station;
• a measurement receiving unit configured to receive the measured reception quality level of the radio signal transmitted from the target base station from the mobile station via the target base station or the other base station;
• and
• a radio parameter control unit configured to control a radio parameter of the target base station or the other base station based on the received reception quality level.

A base station, comprising:

• a condition reporting unit configured to receive from a base station controller a measurement condition and a report condition used by a mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from a target base station that is either its own base station or another base station and to report the measurement condition and the report condition to the mobile station;
• a measurement transfer unit configured to receive from the mobile station the measured reception quality level of the radio signal transmitted from the target base station and to transfer the received reception quality level to the base station controller;
• and
• a parameter setting unit configured to set a radio parameter transmitted from the base station controller in its own base station.

A base station, comprising:

• a condition reporting unit configured to receive from a base station controller a measurement condition and a report condition used by a mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from a target base station that is either its own base station or another base station and to report the measurement condition and the report condition to the mobile station;
• a measurement receiving unit configured to receive the measured reception quality level of the radio signal transmitted from the target base station from the mobile station directly or via the other base station and the base station controller;
• and
• a radio parameter control unit configured to control a radio parameter of its own base station or the other base station based on the received reception quality level.

A base station radio parameter control method, comprising:

• a condition reporting step, performed by a base station controller that is an upper node of a target base station, of reporting to a mobile station via the target base station a measurement condition and a report condition used by the mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from the target base station;
• a measurement reporting step, performed by the mobile station, of measuring the reception quality level of the radio signal transmitted from the target base station if the measurement condition is satisfied and reporting the measured reception quality level to the base station controller via the target base station or another base station if the report condition is satisfied;
• and
• a radio parameter control step, performed by the base station controller, of controlling a radio parameter of the target base station or the other base station based on the reported reception quality level.

A base station radio parameter control method, comprising:

• a condition reporting step, performed by a base station controller that is an upper node of a target base station, of reporting to a mobile station via the target base station a measurement condition and a report condition used by the mobile station to determine whether to measure and report a reception quality level of a radio signal transmitted from the target base station;
• a measurement reporting step, performed by the mobile station, of measuring the reception quality level of the radio signal transmitted from the target base station if the measurement condition is satisfied and reporting the measured reception quality level to the target base station directly or via another base station and the base station controller if the report condition is satisfied;
• and
• a radio parameter control step, performed by the target base station, of controlling a radio parameter of the target base station or the other base station based on the reported reception quality level.