Mobile communication method and radio base station

A mobile communication method comprising:

• a step A of causing a mobile station, connected to a first cell under a first radio base station, to transmit to the first radio base station, a measurement report including information concerning a second cell under a second radio base station;
• a step B of causing the first radio base station to transmit a coordinated multi-point transmission-reception preparation signal to the second radio base station;
• a step C of causing the second radio base station to transmit setting information on the second cell to the first radio base station;
• a step D of causing the first radio base station to conduct setting of the mobile station to perform coordinated multi-point transmission-reception using the first radio base station and the second radio base station;
• a step E of causing the mobile station to notify the first radio base station of radio quality in the second cell;
• and
• a step F of causing the first radio base station, in response to the notification, to instruct the second radio base station to start scheduling for the mobile station and to instruct the mobile station to activate the coordinated multi-point transmission-reception.