Device and method

1. A device comprising:

circuitry configured to

dynamically change an uplink/downlink configuration of a time division duplex (TDD) carrier, and

notify a terminal device of a radio resource for device-to-device communication for the uplink/downlink configuration,

wherein the radio resource corresponds to at least one uplink subframe of the uplink/downlink configuration,

each of the at least one uplink subframe is included in two or more successive uplink subframes of the uplink/downlink configuration,

one or more uplink subframes of the two or more successive uplink subframes are not included in the at least one uplink subframe, and

the circuitry is further configured to notify the terminal device of the radio resource when the uplink/downlink configuration includes two or more successive uplink subframes.

2. The device according to claim 1 , wherein the circuitry is further configured to change the uplink/downlink configuration from one configuration among multiple configurations to another configuration among the multiple configurations.

3. The device according to claim 2 , wherein the circuitry is further configured to notify the terminal device of the radio resource for device-to-device communication for the other configuration in accordance with the change of the uplink/downlink configuration, and

the radio resource appropriate for the another configuration is a radio resource of at least one uplink subframe of the other configuration.

4. The device according to claim 2 , wherein the circuitry is further configured to notify the terminal device of the radio resource for device-to-device communication for each of the multiple configurations.

5. The device according to claim 4 , wherein the radio resource for each of the multiple configurations includes a radio resource for device-to-device communication for each configuration, and

the radio resource for each configuration corresponds to at least one uplink subframe of the configuration.

6. The device according to claim 4 , wherein the radio resource for each of the multiple configurations corresponds to at least one uplink subframe common among the multiple configurations.

7. The device according to claim 1 , wherein a number of uplink subframes included in the at least one uplink subframe differs according to a number of uplink subframes of the uplink/downlink configuration.

8. The device according to claim 1 , wherein the radio resource is repeated at a period corresponding to a number of uplink subframes of the uplink/downlink configuration.

9. The device according to claim 1 , wherein the circuitry is further configured to notify terminal device of the radio resource when a number of uplink subframes of the uplink/downlink configuration is equal to or greater than a predetermined number.

10. The device according to claim 1 , wherein the uplink/downlink configuration is a configuration including at least a predetermined number of uplink subframes.

11. The device according to claim 1 , wherein the uplink/downlink configuration is a configuration including two or more successive uplink subframes.

12. The device according to claim 1 , wherein the circuitry is further configured to notify the terminal device of the radio resource by reporting system information indicating the radio resource.

13. The device according to claim 1 , wherein the circuitry is further configured to notify the terminal device of the uplink/downlink configuration.

14. A device comprising:

circuitry configured to

acquire information indicating a radio resource for device-to-device communication for an uplink/downlink configuration of a time division duple (TDD) carrier dynamically changed by a base station; and

control device-to-device communication using the radio resource,

wherein the radio resource corresponds to at least one uplink subframe of the uplink/downlink configuration,

the uplink/downlink configuration is a configuration that is changed from one configuration among multiple configurations to another configuration among the multiple configurations, and

wherein the circuitry is further configured to acquire information indicating the radio resource for the uplink/downlink configuration among radio resources for device-to-device communication for the respective multiple configurations on the basis of the uplink/downlink configuration.

15. A method comprising:

acquiring information indicating a radio resource for device-to-device communication for an uplink/downlink configuration of a time division duple (TDD) carrier that is dynamically changed by a base station; and

controlling, by a processor, device-to-device communication using the radio resource,

wherein the radio resource corresponds to at least one uplink subframe of the uplink/downlink configuration,

the uplink/downlink configuration is a configuration that is changed from one configuration among multiple configurations to another configuration among the multiple configurations, and

wherein the method further includes acquiring information indicating the radio resource for the uplink/downlink configuration among radio resources for device-to-device communication for the respective multiple configurations on the basis of the uplink/downlink configuration.

16. A device comprising:

circuitry configured to

dynamically change an uplink/downlink configuration of a time division duplex (TDD) carrier, and

notify a terminal device of a radio resource for device-to-device communication for the uplink/downlink configuration,

wherein the radio resource is periodic and period information indicating a period of the radio resource is notified by the circuitry with a configuration of the uplink/downlink configuration of a TDD, and

wherein the radio resource corresponds to an uplink subframe of a first number and is repeated at a first period when the uplink/downlink configuration is a first configuration, and the radio resource is a radio resource of an uplink subframe of a second number less than the first number and is repeated at a second period shorter than the first period when the uplink/downlink configuration is a second configuration.