Method and apparatus of controlling periodic CSI reporting

1. A user equipment (UE) to transmit at least one of a Channel Quality Indicator (CQI) and a Precoding Matrix Indicator (PMI), the UE comprising:

a processor to establish a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode;

a receiver to receive an RRC message from the base station through the first serving cell; and

a transmitter,

wherein the processor is configured to determine the RRC message comprising carrier aggregation (CA) configuration information, the CA configuration information comprising information of a second serving cell supporting a Frequency Division Duplex (FDD) mode, and the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme and determine a periodicity (Npd) and an offset (NOFFSET,CQI) based on a cqi-pmi-ConfigIndex received from the base station, the cqi-pmi-ConfigIndex being a numerical parameter, the periodicity (Npd) being a periodicity for periodically reporting at least one of CQI and PMI with respect to the second serving cell, the offset (NOFFSET,CQI) being an offset for periodically reporting the at least one of CQI and PMI, and the periodicity (Npd) being determined further based on a TDD UL(Uplink)/DL(Downlink) configuration of the first serving cell,

wherein the transmitter periodically transmits, to the base station, the at least one of CQI and PMI according to the periodicity (Npd) and the offset (NOFFSET,CQI) through the first serving cell or the second serving cell, and

wherein the processor is configured to determine the periodicity (N pd ) and the offset (N OFFSET,CQI ) based on the cqi-pmi-ConfigIndex (I CQI/PMI ) shown in Table 1:

TABLE 1

I CQI/PMI

Value of N pd

Value of N OFFSET, CQI

I CQI/PMI = 0

1

I CQI/PMI

1 ≦ I CQI/PMI ≦ 5#

5

I CQI/PMI − 1 

 6 ≦ I CQI/PMI ≦ 15#

10

I CQI/PMI − 6 

16 ≦ I CQI/PMI ≦ 35#

20

I CQI/PMI − 16

36 ≦ I CQI/PMI ≦ 75#

40

I CQI/PMI − 36

 76 ≦ I CQI/PMI ≦ 155#

80

I CQI/PMI − 76

156 ≦ I CQI/PMI ≦ 315#

160

 I CQI/PMI − 156

 316 ≦ I CQI/PMI ≦ 1023#

Reserved.

2. The UE of claim 1 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 3, 4, 6}, the receiver receives the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as 1.

3. The UE of claim 1 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 2, 6}, the receiver receives the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as 5.

4. The UE of claim 1 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 2, 3, 4, 5, 6}, the receiver receives the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as one of 10, 20, 40, 80, and 160.

5. The UE of claim 1 , wherein:

the receiver receives information to configure enhanced Interference Management and Traffic Adaptation (eIMTA) for the first serving cell;

the processor is configured to confirm DL reference UL/DL configuration of the first serving cell; and

the receiver receives the cqi-pmi-ConfigIndex from the base station.

6. The UE of claim 5 , wherein, if the UE is configured with the eIMTA for the first serving cell supporting the TDD mode, the TDD UL/DL configuration of the first serving cell corresponds to DL reference UL/DL configuration.

7. The UE of claim 5 , wherein, if the UE is configured with the eIMTA for the first serving cell supporting the TDD mode, the processor is configured to select the DL reference UL/DL configuration of the first serving cell for DL HARQ from among TDD UL/DL configuration {2, 4, 5}.

8. The UE of claim 1 , wherein the transmitter transmits the CQI and the PMI as channel state information for the second serving cell, and the CQI and the PMI are included in a Physical Uplink Control Channel (PUCCH), and

wherein the transmitter transmits the PUCCH through the first serving cell or the second serving cell.

9. A user equipment (UE) to transmit at least one of a Channel Quality Indicator (CQI) and a Precoding Matrix Indicator (PMI), the UE comprising:

a processor to establish a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Frequency Division Duplex (FDD) mode;

a receiver to receive an RRC message from the base station through the first serving cell; and

a transmitter,

wherein the processor is configured to determine the RRC message comprising carrier aggregation (CA) configuration information, the CA configuration information comprising information of a second serving cell supporting a Time Division Duplex (TDD) mode, and the first serving cell and the second serving cell being aggregated by an FDD-TDD CA scheme and determine a periodicity (Npd) and an offset (NOFFSET,CQI) based on a cqi-pmi-ConfigIndex received from the base station, the cqi-pmi-ConfigIndex being a numerical parameter, the periodicity (Npd) being a periodicity for periodically reporting at least one of CQI and PMI with respect to the second serving cell, and the offset (NOFFSET,CQI) being an offset for periodically reporting the at least one of CQI and PMI,

wherein the transmitter periodically transmits, to the base station, the at least one of CQI and PMI according to the periodicity (Npd) and the offset (NOFFSET,CQI) through the first serving cell or the second serving cell, and

wherein the processor is configured to determine the periodicity (Npd) and the offset (NOFFSET,CQI) based on the cqi-pmi-ConfigIndex (ICQI/PMI) shown in Table 2

TABLE 2

I CQI/PMI

Value of N pd

Value of N OFFSET, CQI

0 ≦ I CQI/PMI ≦ 1

2

I CQI/PMI

2 ≦ I CQI/PMI ≦ 6#

5

I CQI/PMI − 2 

 7 ≦ I CQI/PMI ≦ 16#

10

I CQI/PMI − 7 

17 ≦ I CQI/PMI ≦ 36#

20

I CQI/PMI − 17 

37 ≦ I CQI/PMI ≦ 76#

40

I CQI/PMI − 37 

 77 ≦ I CQI/PMI ≦ 156#

80

I CQI/PMI − 77 

157 ≦ I CQI/PMI ≦ 316#

160

I CQI/PMI − 157

I CQI/PMI = 317#

Reserved

318 ≦ I CQI/PMI ≦ 349#

32

I CQI/PMI − 318

350 ≦ I CQI/PMI ≦ 413#

64

I CQI/PMI − 350

414 ≦ I CQI/PMI ≦ 541#

128

I CQI/PMI − 414

 542 ≦ I CQI/PMI ≦ 1023#

Reserved.

10. The UE of claim 9 , wherein the transmitter transmits the CQI and the PMI as channel state information for the second serving cell, and the CQI and the PMI are included in a Physical Uplink Control Channel (PUCCH), and

wherein the transmitter transmits the PUCCH through the first serving cell or the second serving cell.

11. A base station to receive at least one of a Channel Quality Indicator (CQI) and a Precoding Matrix Indicator (PMI), the base station comprising:

a processor to establish a Radio Resource Control (RRC) connection with a user equipment (UE) through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode or a Frequency Division Duplex (FDD) mode;

a transmitter to transmit an RRC message for the UE through the first serving cell, the RRC message comprising carrier aggregation (CA) configuration information and a cqi-pmi-ConfigIndex, the CA configuration information comprising information of a second serving cell supporting an FDD mode or a TDD mode, and the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme or an FDD-TDD CA scheme for the UE; and

a receiver to periodically receive, from the UE, at least one of CQI and PMI with respect to the second serving cell, the at least one of CQI and PMI being received through the first serving cell or the second serving cell,

wherein the processor is configured to determine a periodicity (Npd) and an offset (NOFFSET,CQI) for the at least one of CQI and PMI based on the cqi-pmi-ConfigIndex, the cqi-pmi-ConfigIndex being a numerical parameter, the periodicity (Npd) being a periodicity for periodically reporting the at least one of CQI and PMI with respect to the second serving cell, and the offset (NOFFSET,CQI) being an offset for periodically reporting the at least one of CQI and PMI, and

wherein, when the first serving cell supports a TDD mode and the second serving cell supports an FDD mode, the processor is configured to determine the periodicity (Npd) further based on a TDD UL(Uplink)/DL(Downlink) configuration of the first serving cell,

wherein, when the first serving cell supports a TDD mode and the second serving cell supports an FDD mode, the processor is configured to determine the periodicity (N pd ) and the offset (N OFFSET,CQI ) based on the cqi-pmi-ConfigIndex (I CQI/PMI ) shown in Table 3:

TABLE 3

I CQI/PMI

Value of N pd

Value of N OFFSET, CQI

I CQI/PMI = 0

1

I CQI/PMI

1 ≦ I CQI/PMI ≦ 5#

5

I CQI/PMI − 1 

 6 ≦ I CQI/PMI ≦ 15#

10

I CQI/PMI − 6 

16 ≦ I CQI/PMI ≦ 35#

20

I CQI/PMI − 16

36 ≦ I CQI/PMI ≦ 75#

40

I CQI/PMI − 36

 76 ≦ I CQI/PMI ≦ 155#

80

I CQI/PMI − 76

156 ≦ I CQI/PMI ≦ 315#

160

 I CQI/PMI − 156

 316 ≦ I CQI/PMI ≦ 1023#

Reserved.

12. The base station of claim 11 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 3, 4, 6}, the transmitter transmits the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as 1.

13. The base station of claim 11 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 2, 6}, the transmitter transmits the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as 5.

14. The base station of claim 11 , wherein:

when the first serving cell is a primary serving cell supporting the TDD mode, the second serving cell is a secondary serving cell supporting the FDD mode, and the TDD UL/DL configuration of the first serving cell belongs to {0, 1, 2, 3, 4, 5, 6}, the transmitter transmits the cqi-pmi-ConfigIndex indicating that the periodicity (Npd) for the second serving cell is set as one of 10, 20, 40, 80, and 160.

15. The base station of claim 11 , wherein:

the transmitter transmits information to configure enhanced Interference Management and Traffic Adaptation (eIMTA) for the first serving cell.

16. The base station of claim 15 , wherein, if the UE is configured with the eIMTA for the first serving cell supporting the TDD mode, the TDD UL/DL configuration of the first serving cell corresponds to DL reference UL/DL configuration.

17. The base station of claim 11 , when, the first serving cell supports an FDD mode and the second serving cell supports a TDD mode, the processor is configured to determine the periodicity (N pd ) and the offset (N OFFSET,CQI ) based on the cqi-pmi-ConfigIndex (I CQI/PMI ) shown in Table 4

TABLE 4

I CQI/PMI

Value of N pd

Value of N OFFSET, CQI

0 ≦ I CQI/PMI ≦ 1

2

I CQI/PMI

2 ≦ I CQI/PMI ≦ 6#

5

I CQI/PMI − 2 

 7 ≦ I CQI/PMI ≦ 16#

10

I CQI/PMI − 7 

17 ≦ I CQI/PMI ≦ 36#

20

I CQI/PMI − 17 

37 ≦ I CQI/PMI ≦ 76#

40

I CQI/PMI − 37 

 77 ≦ I CQI/PMI ≦ 156#

80

I CQI/PMI − 77 

157 ≦ I CQI/PMI ≦ 316#

160

I CQI/PMI − 157

I CQI/PMI = 317#

Reserved

318 ≦ I CQI/PMI ≦ 349#

32

I CQI/PMI − 318

350 ≦ I CQI/PMI ≦ 413#

64

I CQI/PMI − 350

414 ≦ I CQI/PMI ≦ 541#

128

I CQI/PMI − 414

 542 ≦ I CQI/PMI ≦ 1023#

Reserved.

18. The base station of claim 11 , wherein the receiver receives the CQI and the PMI as channel state information for the second serving cell, and the CQI and the PMI are included in a Physical Uplink Control Channel (PUCCH), and

wherein the receiver receives the PUCCH through the first serving cell or the second serving cell.