Base station device, control station device, and transmission power control method

A base station apparatus comprising:

• total-transmission-power measurement means for measuring a total-transmission-power-value which is a sum of transmission power of signals transmitted to a plurality of communication terminals at the same time;
• comparison means for outputting instructions to reduce allowable transmission-power to a control station apparatus when said total-transmission-power-value is larger than a reference total-transmission-power-value which has been previously set;
• and
• transmission control means for deciding transmission rates of the signals for each communication terminal apparatus, based on allowable transmission-power-values which have been output from said control station apparatus.

A control station apparatus comprising:

• comparison means for judging whether allowable transmission power is required to be reduced or not when a total-transmission-power-value output from a base station apparatus is larger than a reference total-transmission-power-value which has been previously set;
• and
• allowable-transmission-power setting means for setting, for each communication terminal, allowable transmission-power-values, which represent allowable power of signals based on said judgment, and for outputting the set values to said base station apparatus, wherein said base station apparatus comprises:
• total-transmission-power measurement means for measuring the total-transmission-power-value which is a sum of transmission power of said signals transmitted to a plurality of communication terminals at the same time, and for outputting the measured values to said control station apparatus;
• and
• transmission control means for deciding transmission rates of the signals for each communication terminal, based on allowable transmission-power-values, which have been output from said control station apparatus, for each communication terminal apparatus.

A control station apparatus comprising

• allowable-transmission-power setting means for setting allowable transmission values for each communication terminal apparatus based on instructions output from a base station apparatus to reduce allowable transmission-power, and for outputting the set values to said base station apparatus, wherein said base station apparatus comprises:
• total-transmission-power measurement means for measuring a total-transmission-power-value which is a sum of transmission power of signals transmitted to a plurality of communication terminals at the same time;
• comparison means for outputting an instruction to reduce allowable transmission power to said control station apparatus, when said total-transmission-power-value is larger than a reference total-transmission-power-value which has been previously set;
• and
• transmission control means for deciding transmission rates of the signals for each communication terminal, based on said allowable transmission-power-values output from said control station apparatus.

A method for controlling transmission power, wherein

• a total-transmission-power-value which is a sum of transmission power of signals transmitted to a plurality of communication terminals at the same time is measured;
• a decrement in total-transmission-power is calculated, when said total-transmission-power-value is larger than allowable total-transmission-power-values which have been previously set;
• and
• allowable transmission-power-values and transmission rates of said signals are decided for each communication terminal apparatus, based on said decrement.