Patent ID: 8670438

Claim:
A communication method in a base station apparatus that is configured to perform radio communication with a plurality of mobile station apparatuses using a plurality of frequency layers having frequency bands different each other, the communication method comprising: determining a communication condition of each of said mobile station apparatuses; said communication condition includes at least a downlink channel status numerical value; transmitting downlink cell common control data on a low-frequency layer, transmitting downlink cell dedicated traffic data corresponding to each of said mobile station to a low-frequency layer and/or a high-frequency layer on the basis of said communication condition as a result of said determination of the communication condition of each of said mobile station apparatuses; comparing said downlink channel status numerical value with a predetermined threshold value; and transmitting downlink cell dedicated traffic data on said low-frequency layer based on said result of said determination being that if said downlink channel status numerical value is smaller than said predetermined threshold value.