Method and apparatus for channel quality indicator (CQI) and channel state information (CSI) reporting

1. A user equipment (UE) comprising:

a transceiver configured to receive configuration information for reporting channel state information (CSI); and

a processor operably connected to the transceiver, the processor configured to decode the configuration information and calculate the CSI,

wherein the transceiver is further configured to transmit the CSI including a channel quality indicator (CQI), and wherein:

the configuration information includes a selection of a CQI table and a target block error rate (BLER),

a first CQI is reported when a reported rank indicator (RI) value is 4 or less,

when the reported RI value is greater than 4, the first CQI and a second CQI are each reported, and

the second CQI is of a same payload size as that of the first CQI.

2. The UE of claim 1 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with a same CQI payload size and different sets of modulation-and-coding schemes (MCSs), respectively.

3. The UE of claim 1 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with different CQI payload sizes.

4. The UE of claim 3 , wherein the at least two tables are associated with different BLER targets.

5. The UE of claim 4 , wherein one of the payload sizes is 4 bits.

6. A base station (BS) comprising:

a processor configured to generate configuration information for a channel state information (CSI) reporting; and

a transceiver operably connected to the processor, the transceiver configured to:

transmit, to a UE, the configuration information; and

receive, from the UE, a CSI report that includes a channel quality indicator (CQI),

wherein:

the configuration information includes a selection of a CQI table and a target block error rate (BLER),

a first CQI is reported when a reported rank indicator (RI) value is 4 or less,

when the reported RI value is greater than 4, the first CQI and a second CQI are each reported, and

the second CQI is of a same payload size as that of the first CQI.

7. The BS of claim 6 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with a same CQI payload size and different sets of modulation-and-coding schemes (MCSs), respectively.

8. The BS of claim 6 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with different CQI payload sizes.

9. The BS of claim 8 , wherein the at least two tables are associated with different BLER targets.

10. A method for operating a user equipment (UE), the method comprising:

receiving and decoding configuration information for reporting channel state information (CSI); and

calculating and transmitting the CSI including a channel quality indicator (CQI);

wherein:

the configuration information includes a selection of a CQI table and a target block error rate (BLER),

a first CQI is reported when a reported rank indicator (RI) value is 4 or less,

when the reported RI value is greater than 4, the first CQI and a second CQI are each reported, and

the second CQI is of a same payload size as that of the first CQI.

11. The method of claim 10 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with a same CQI payload size and different sets of modulation-and-coding schemes (MCSs), respectively.

12. The method of claim 10 , wherein:

the CQI table is selected from a plurality of tables, and

at least two of the tables are associated with different CQI payload sizes.

13. The method of claim 12 , wherein the at least two tables are associated with different BLER targets.

14. The method of claim 13 , wherein one of the payload sizes is 4 bits.