| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system, a base station device and a communication method, suitable for carrier aggregation in a HetNet.SOLUTION: A communication system, including a first transmission point (20A) and a plurality of second transmission points (20B), controls carriers in such a manner that a mobile terminal device (10) communicates with the first transmission point using a first carrier (CC#1) and communicates with each second transmission point using a second carrier (CC#2) different from the first carrier. A base station device (20B) constituting the second transmission point transmits respective reference signals proper to cells, using a frequency resource identical to a frequency resource of the second carrier for use between the second transmission points. The mobile terminal device receives the reference signal transmitted from the second transmission point through the second carrier. |
