Method and apparatus for controlling adaptive reporting in TDD environment
View Patent ↗A method for enabling a base station to control adaptive reporting in a TDD environment according to one embodiment of the present invention comprises the steps of: transmitting, from a base station to a terminal, an information element including reporting-setting information comprising reporting cycle and reporting offset of channel state information; transmitting information of a UL-DL setting change to the terminal; and receiving the channel state information by using the reporting cycle and the reporting offset of the reporting-setting information corresponding to the changed UL-DL setting.
1. A method for controlling adaptive reporting by a base station in a Time Division Duplexing (TDD) environment, the method comprising:
transmitting, from the base station to a user equipment a specific selection of a downlink (DL)-reference uplink (UL)-DL configuration for the user equipment via higher layer signaling;
transmitting an information element including reporting configuration information including a reporting periodicity and a reporting offset of channel status information, from the base station to the user equipment;
transmitting information on an UL-DL configuration change on a physical downlink control channel (PDCCH), from the base station to the user equipment, wherein the UL-DL configuration change results in a corresponding UL-DL configuration that is different from the DL-reference UL-DL configuration;
performing UL reception and DL transmission according to the corresponding UL-DL configuration; and
receiving the channel status information from the user equipment according to the DL-reference UL-DL configuration to which the reporting configuration information is applied.
2. The method as claimed in claim 1 , wherein the information element comprises one or more pieces of reporting configuration information, and one piece of reporting configuration information corresponds to one UL-DL configuration.
3. A method for controlling adaptive reporting by a user equipment in a Time Division Duplexing (TDD) environment, the method comprising:
receiving a specific selection of a downlink (DL)-reference uplink (UL)-DL configuration for the user equipment via higher layer signaling, from a base station by the user equipment via higher layer signaling;
receiving an information element including reporting configuration information including a reporting periodicity and a reporting offset of channel status information, from the base station by the user equipment;
receiving information on an UL-DL configuration change on a physical downlink control channel (PDCCH), from the base station by the user equipment;
performing DL reception and UL transmission according to the corresponding UL-DL configuration; and
transmitting the channel status information according to the DL-reference UL-DL configuration to which the reporting configuration information is.
4. The method as claimed in claim 3 , wherein the information element comprises one or more pieces of reporting configuration information, and one piece of reporting configuration information corresponds to one UL-DL configuration.
5. A base station for controlling adaptive reporting in a Time Division Duplexing (TDD) environment, the base station comprising:
a controller for generating: 1) a specific selection of a downlink (DL)-reference uplink (UL)-DL configuration for a user equipment, and 2) an information element including reporting configuration information including a reporting periodicity and a reporting offset of channel status information;
a transmitter for transmitting to the user equipment 1) the specific selection of a downlink (DL)-reference uplink (UL)-DL configuration, wherein the specific selection of a downlink (DL)-reference uplink (UL)-DL configuration is transmitted via higher layer signaling, 2) the generated information element, and 3) information on an UL-DL configuration change of the user equipment; and
a receiver for receiving a signal from the user equipment,
wherein the controller controls the receiver to receive indicator information of the user equipment according to the DL-reference UL-DL configuration to which the reporting configuration information is applied.
6. The base station as claimed in claim 5 , wherein the information element comprises one or more pieces of reporting configuration information, and one piece of reporting configuration information corresponds to one UL-DL configuration.
7. A user equipment for controlling adaptive reporting in a Time Division Duplexing (TDD) environment, the user equipment comprising:
a receiver for receiving, from a base station: 1) a specific selection of a downlink (DL)-reference uplink (UL)-DL configuration for the user equipment, wherein the specific selection of a downlink (DL)-reference uplink (UL)-DL configuration is received via higher layer signaling, 2) an information element including reporting configuration information including a reporting periodicity and a reporting offset of channel status information, and 3) information on an UL-DL configuration change;
a transmitter for transmitting a signal to the base station; and
a controller for controlling the transmitter to transmit the channel status information according to the DL-reference UL-DL configuration to which the reporting configuration information is applied.
8. The method of claim 1 , wherein the channel status information comprises Channel Quality Indicator.
9. The method of claim 1 , wherein the channel status information comprises Precoding Matrix Indicator.
10. The method of claim 1 , wherein the higher layer signaling comprises radio resource control signaling.
11. The method of claim 1 , wherein said receiving the channel status information from the user equipment occurs after said transmitting information on the UL-DL configuration change.
12. The method of claim 3 , wherein the channel status information comprises Channel Quality Indicator.
13. The method of claim 3 , wherein the channel status information comprises Precoding Matrix Indicator.
14. The method of claim 3 , wherein the higher layer signaling comprises radio resource control signaling.
15. The base station of claim 5 , wherein the channel status information comprises Channel Quality Indicator.
16. The base station of claim 5 , wherein the channel status information comprises Precoding Matrix Indicator.
17. The base station of claim 5 , wherein the higher layer signaling comprises radio resource control signaling.
18. The user equipment of claim 7 , wherein the channel status information comprises Channel Quality Indicator.
19. The user equipment of claim 7 , wherein the channel status information comprises Precoding Matrix Indicator.
20. The user equipment of claim 7 , wherein the higher layer signaling comprises radio resource control signaling.