Radio station and method of processing user data with radio station

A radio station that is used in a radio communication network and is capable of transmitting and receiving user data including downlink user data and uplink user data to and from a plurality of mobile stations via an air interface, the radio station comprising:

• a first part;
• and
• at least one second part that can be arranged so as to be physically separated from the first part, and is connected to the first part via a transmission line so as to be able to communicate with the first part, wherein
• the first part comprises a first bearer termination unit capable of terminating at least one bearer between an upper network and the radio station,
• the second part comprises a digital physical layer unit configured to perform digital physical layer signal processing, the digital physical layer signal processing includes channel coding for transmitting, to the air interface, the downlink user data pertaining to a first mobile station connected to the second part among the plurality of mobile stations, and channel decoding for restoring the uplink user data pertaining to the first mobile station from a signal received from the air interface,
• the first part further comprises a first scheduling unit configured to perform dynamic scheduling to allocate a radio resource to the plurality of mobile stations,
• the second part further comprises a second scheduling unit configured to operate in a cooperative manner with the first scheduling unit for the dynamic scheduling, and
• the second scheduling unit configured to calculate a parameter used for the dynamic scheduling based on a radio communication quality and send the parameter to the first scheduling unit.