| 摘要 |
A mobile station apparatus can stably communicate with a base station apparatus even when interference occurs due to a signal from another apparatus in a part of a frequency band used for communication. A second base station apparatus communicates with the mobile station apparatus using a common frequency band, which is all or part of a frequency band to be used for communication by the first base station apparatus, and a dedicated frequency band to be unused by the first base station apparatus. A communication band selection unit a256 of the second base station apparatus selects the common frequency band as a frequency band to be used for communication with the mobile station apparatus in case that radio quality of the common frequency band in the mobile station apparatus is greater than a predetermined threshold value, and selects the dedicated frequency band as the frequency band to be used for the communication with the mobile station apparatus in case that the radio quality of the common frequency band in the mobile station apparatus is less than the predetermined threshold value. |
