| 摘要 |
PROBLEM TO BE SOLVED: To realize efficiency in a system and to save system resources by controlling power in a down-link or an up-link in accordance with the quality of first and second channels between a mobile station and base station. SOLUTION: In the case of the down-link in a communication system 8, when the first and second communication channels with the base station 10 are established, the mobile station 30 measures the quality of a service parameter in each channel with a measuring instrument 34, it is compared with previously set prescribed target quality, the difference is adopted as increment updating data to decide control data for controlling down-link transmission power and it is transmitted to the base station 10. The down-link power controller 14 adjusts transmission power by referring to increment offset data based on control data from the mobile station 30. In the case of the up-link. The up-link controller 36 of the mobile station 30 adjusts the transmission power of its own station by control data based on increment updating data from the base station 10 in the same way and executes the same processing as necessary or regularly afterward.
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