PROBLEM TO BE SOLVED: To provide a radio communication method, a radio base station, and a radio communication system, capable of reducing signaling and resource consumption for use for the calculation of base station clustering, by selecting optimal base station clustering according to a communication state between a terminal and each base station.SOLUTION: In the radio communication method of the present invention, a first base station communicating with the terminal transmits a request message for consulting cooperative transmission to a second base station that communicates with the terminal in cooperation with the first base station. On the basis of the received request message, the second base station transmits response signaling to the first base station.

To reduce an uplink interference in a network with a first base station of a large output and a second base station of a small output. Detecting the interference, the second base station urges the first base station to hand over a terminal causing it to the second base station. Multiple base stations and one or more terminals exist in this system, each terminal connects with one base station, and a serving base station is changed according to a communication state of each terminal. If the different second base station other than the first base station to which the terminal connects detects a large interference, the second base station will multicast transmit information for urging handover to the base stations except itself. The base station having received the information specifies a terminal giving the interference to the second base station, and makes it to be handed over thereto.

Disclosed is a distributed antenna system that selects an antenna in accordance with the position of a mobile terminal and reduces the variation in the total number of mobile terminals using each antenna while maintaining adequate communication quality. In the distributed antenna system in which a large number of antennas are distributively disposed, an antenna group including antennas having good communication quality is selected in accordance with the position of a mobile terminal. Further, in accordance with the communication quality and load status of a current antenna group and with the communication quality and load status of a post-change antenna group, which is obtained by changing some antennas in the current antenna group, the post-change antenna group is formed by changing some antennas in the current antenna group with which a mobile terminal using a heavily loaded antenna communicates.

Disclosed are a communication control device, a communication control method and the system thereof, which provide efficient multi-base station joint services in a mobile communication system using dynamic clustering. Optimal base station clustering is chosen according to the communication state between a terminal and each base station, and the signaling and resources cost for calculating a base station clustering is reduced. The communication control device connects with multiple base stations through a network, and clusters the multiple base stations dynamically so that the clustered multiple base stations can provide services for the mobile terminal in union. The communication control device comprises: an interface, connecting with multiple base stations, receiving channel state information (1512) related to the mobile terminal from each base station; a memory unit, storing the channel state information (1512) of the mobile terminal received from the interface; a control unit, clustering each base station dynamically according to the channel state information (1512) of the mobile terminal stored in the memory unit.