Mobile communication method, radio base station, and mobile station

A radio base station comprising:

• a transmission unit configured to notify configuration information of a reference signal for a mobile station in a transmission point to the mobile station connected to a cell managed by the radio base station, when instructing an addition or change of the transmission point performing a coordinated multi-point transmission/reception process by an RRCConnectionReconfiguration including radioResourceConfigDedicated therein,
• wherein an information element that notifies the configuration information of the reference signal for the mobile station in the transmission point, is set in the radioResourceConfigDedicated;
• and
• a reception unit configured to acquire a channel quality of the transmission point, which is measured using the reference signal for the mobile station in the transmission point, from the mobile station, while performing the coordinated multi-point transmission/reception process.

A mobile station comprising:

• a reception unit connected to a cell managed by a radio base station, and configured to receive configuration information of a reference signal for the mobile station in a transmission point when a coordinated multi-point transmission/reception process is performed and an addition or change of a transmission point performing the coordinated multi-point transmission/reception process is instructed from the radio base station by an RRCConnectionReconfiguration including radioResourceConfigDedicated therein,
• wherein an information element that notifies the configuration information of the reference signal for the mobile station in the transmission point, is set in the radioResourceConfigDedicated;
• a processing unit configured to measure a channel quality of the transmission point by using the reference signal for the mobile station in the transmission point, while performing the coordinated multi-point transmission/reception process;
• and
• a transmission unit configured to notify the channel quality of the transmission point to the radio base station.