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 processor configured to:

select identification information for identifying a data series corresponding to a position of the mobile station from a plurality of data series corresponding to resources used to transmit a signal that the mobile station uses to measure reception quality, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on the corresponding position of the mobile station; and

a transmitter configured to transmit the identification information to the mobile station, and

the mobile station includes:

a receiver configured to receive the identification information transmitted by the base station;

a processor configured to measure the reception quality at the one or more antenna ports using the signal of the data series identified by the identification information; and

a transmitter configured to transmit, to the base station, information indicating the reception quality at the one or more antenna ports, wherein

the base station processor is further configured to prepare a plurality of sequence numbers of the signal for respective antenna ports and provide the data series to be used by the mobile station to measure the reception quality.

2. The radio communication system according to claim 1 , wherein the 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 base station transmitter is configured to transmit 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 processor configured to:

select identification information for identifying a data series corresponding to a position of a mobile station from a plurality of data series corresponding to resources used to transmit a signal that the mobile station uses to measure a reception quality, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on the corresponding position of the mobile station;

a transmitter configured to transmit the identification information to the mobile station; and

a receiver configured to receive, from the mobile station, information indicating the reception quality at the one or more antenna ports that is measured using the signal of the data series identified by the identification information, wherein

the processor is further configured to prepare a plurality of sequence numbers of the signal for respective antenna ports and provide the data series to be used by the mobile station to measure the reception quality.

5. The base station according to claim 4 , wherein the identification information indicates correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

6. The base station according to claim 5 , wherein the transmitter is further configured to transmit information in which the correspondence is set for each item of identification information to the mobile station prior to transmission of the identification information.

7. A mobile station comprising:

a receiver configured to receive, from a base station, 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, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on a corresponding position of the mobile station;

a processor configured to measure the reception quality at the one or more antenna ports using the signal of the data series identified by the identification information; and

a transmitter configured to transmit, to the base station, information indicating the reception quality, measured by the mobile station, at the one or more antenna ports, wherein

the data series is provided to measure the reception quality.

8. The mobile station according to claim 7 , wherein the identification information indicates correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

9. The mobile station according to claim 8 , wherein the receiver is further configured to receive information in which the correspondence is set for each item of identification information prior to transmission of the identification information.

10. A mobile station comprising:

an RF circuit configured to receive, from a base station, 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, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on a corresponding position of the mobile station;

an integrated circuit configured to measure the reception quality at the one or more antenna ports using the signal of the data series identified by the identification information; and

the RF circuit further configured to transmit information indicating the measured reception quality at the one or more antenna ports to the base station, wherein

the data series is provided to measure the reception quality.

11. The mobile station according to claim 10 , wherein the identification information indicates correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

12. The mobile station according to claim 11 , wherein the RF circuit is further configured to receive information in which the correspondence is set for each item of identification information prior to transmission of the identification information.

13. A base station comprising:

a processing circuit configured to select identification information for identifying a data series corresponding to a position of a mobile station from a plurality of data series corresponding to resources used to transmit a signal that a mobile station uses to measure reception quality, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on the corresponding position of the mobile station;

an RF circuit configured to transmit the identification information to the mobile station, and further configured to receive from the mobile station information indicating reception quality at the one or more antenna ports that is measured using the signal of the data series identified by the identification information; and

the processing circuit is further configured to prepare a plurality of sequence numbers of the signal for respective antenna ports and provides the data series to be used by the mobile station to measure the reception quality.

14. The base station according to claim 13 , wherein the identification information indicates correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

15. The base station according to claim 14 , wherein the RF circuit is further configured to transmit information in which the correspondence is set for each item of identification information to the mobile station prior to transmission of the identification information.

16. A method executed by a mobile station including a processing circuit and memory, the method comprising:

receiving 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, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on a corresponding position of the mobile station;

measuring the reception quality at the one or more antenna ports using the signal of the data series identified by the identification information; and

transmitting information to a base station indicating the measured reception quality at the one or more antenna ports, wherein

the data series is provided to measure the reception quality.

17. The method according to claim 16 , further comprising:

receiving information in which correspondence is set for each item of identification information prior to transmission of the identification information, wherein the identification information indicates the correspondence between a resource used to transmit the signal to the mobile station and a parameter for specifying the data series.

18. A mobile station comprising:

an RF circuit configured to receive, from a base station, 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, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series, wherein the parameter for specifying the data series changes the data series based on a corresponding position of the mobile station;

an integrated circuit configured to measure the reception quality at the one or more antenna ports using the signal of the data series identified by the identification information; and

the RF circuit further configured to transmit information indicating measured reception quality at the one or more antenna ports to the base station, wherein

the data series is properly changed by the base station to measure the reception quality using on the parameter for specifying the data series.

19. A base station comprising:

a processing circuit configured to select identification information for identifying a data series corresponding to a position of a mobile station from a plurality of data series corresponding to resources used to transmit a signal that a mobile station uses to measure reception quality, the identification information indicating a correspondence between one or more antenna ports and a parameter for specifying the data series;

an RF circuit configured to transmit the identification information to the mobile station, and further configured to receive from the mobile station information indicating reception quality at the one or more antenna ports that is measured using the signal of the data series identified by the identification information; and

the processing circuit is further configured to prepare a plurality of sequence numbers of the signal for respective antenna ports and properly changes the data series to be used by the mobile station to measure the reception quality using on the parameter for specifying the data series.