Radio communication system, base station, mobile station, and radio communication method

1. A radio communication system comprising a base station and a mobile station communicating with the base station, wherein

the base station includes:

a selection unit that selects an item of identification information for identifying a data series from a plurality of data series corresponding to resources used to transmit a signal that the mobile station uses to measure reception quality; and

a first transmitting unit that transmits the item of identification information to the mobile station, and

the mobile station includes:

a receiving unit that receives the item of identification information that the first transmitting unit has transmitted;

a measurement unit that measures the reception quality using a signal of the data series identified by the item of identification information; and

a second transmitting unit that transmits information indicating the reception quality that the measurement unit has measured to the base station, wherein

the selection unit of the base station prepares a plurality of sequence numbers of the signal for respective antenna ports and sequentially changes the data series to be used by the mobile station to measure the reception quality in or after the next time based on the reception quality reported from the mobile station.

2. The radio communication system according to claim 1 , wherein the item of identification information indicates correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

3. The radio communication system according to claim 2 , wherein the first transmitting unit transmits information in which the correspondence is set for each item of identification information to the mobile station prior to transmission of the identification information.

4. A base station comprising:

a selection unit that selects an item of identification information for identifying a data series from a plurality of data series corresponding to resources used to transmit a signal that a mobile station uses to measure reception quality;

a transmitting unit that transmits the item of identification information to the mobile station; and

a receiving unit that receives information indicating reception quality that has been measured using the signal of the data series identified by the identification information from the mobile station, wherein

the selection unit of the base station prepares a plurality of sequence numbers of the signal for respective antenna ports and sequentially changes the data series to be used by the mobile station to measure the reception quality in or after the next time based on the reception quality reported from the mobile station.

5. A mobile station comprising:

a receiving unit that receives, from a base station, an item of identification information for identifying a data series from a plurality of data series corresponding to resources used to transmit a signal that the mobile station uses to measure reception quality;

a measurement unit that measures the reception quality using a signal of the data series identified by the identification information; and

a transmitting unit that transmits information indicating the reception quality that the measurement unit has measured to the base station, wherein

a selection unit of the base station prepares a plurality of sequence numbers of the signal for respective antenna ports and sequentially changes the data series to be used by the mobile station to measure the reception quality in or after the next time based on the reception quality reported from the mobile station.