Patent ID: 8923913

Claim:
A control station to be connected to a first extended base station that forms a first cell and transmits data and training signals and a second extended base station that forms a second cell and transmits data and training signals, said control station comprising: a first signal processor that generates a first training signal specific to the first extended base station, wherein the first training signal includes an identifier for identifying the first extended base station; and a second signal processor that generates a second training signal specific to the second extended base station, wherein the second training signal includes an identifier for identifying the second extended base station, wherein in a case of performing cooperative communication in which same user data is transmitted to a first user terminal located in an overlapping area of the first cell and the second cell via the first extended base station and the second extended base station, the first signal processor and the second signal processor generate first training signals including the identifier for identifying the first extended base station, and both a training signal to be transmitted to the first user terminal via the first extended base station and a training signal to be transmitted to the first user terminal via the second extended base station are the first training signals which include the identifier for identifying the first extended base station.