Method and apparatus for configuring channel quality indicator and method and apparatus for configuring modulation and coding scheme
A User Equipment (UE) including: a plurality of Channel Quality Indicator (CQI) index tables, at least one of which includes one or more CQI index corresponding to a modulation of higher order that is not supported by the other CQI index table; a receiver configured to receive CQI index table indication information from a base station, the CQI index table indication information indicating which CQI index table to use for CQI calculation; and a processor configured to calculate a CQI index by using the CQI index table indicated by the CQI index table indication information.
1. A User Equipment (UE) comprising:
a plurality of Channel Quality Indicator (CQI) index tables, at least one of which includes one or more CQI index corresponding to a modulation of higher order that is not supported by another CQI index table;
a receiver configured to receive CQI index table indication information from a base station, the CQI index table indication information indicating which CQI index table to use for CQI calculation; and
a processor configured to calculate a CQI index by using the CQI index table indicated by the CQI index table indication information.
2. The UE according to claim 1 , wherein CQI index tables among the plurality of CQI index tables support same number of CQI indices.
3. The UE according to claim 1 , wherein CQI indices in CQI index tables among the plurality of CQI index tables are represented by the same bit length.
4. The UE according to claim 1 , wherein the at least one CQI index table includes CQI indices corresponding to all modulations that are supported by the other CQI index table.
5. The UE according to claim 1 , wherein the CQI index table indication information is received via Radio Resource Control (RRC) signal.
6. The UE according to claim 1 , wherein the higher order of modulation is 256 QAM.
7. A method of User Equipment (UE) comprising:
receiving Channel Quality Indicator (CQI) index table indication information from a base station, the CQI index table indication information indicating which CQI index table to use for CQI calculation,
identifying a CQI index table indicated by the CQI index table indication information among a plurality of CQI index tables, at least one of which includes one or more CQI index corresponding to a modulation of higher order that is not supported by another CQI index table; and
calculating a CQI index by using the CQI index table.
8. The method according to claim 7 , wherein CQI index tables among the plurality of CQI index tables support same number of CQI indices.
9. The method according to claim 7 , wherein CQI indices in CQI index tables among the plurality of CQI index tables are represented by the same bit length.
10. The method according to claim 7 , wherein the at least one CQI index table includes CQI indices corresponding to all modulations that are supported by the other CQI index table.
11. The method according to claim 7 , wherein the CQI index table indication information is received via Radio Resource Control (RRC) signal.
12. The method according to claim 7 , wherein the higher order of modulation is 256 QAM.
13. A base station communicating with a User Equipment (UE) to configure the UE with a Channel Quality Indicator (CQI) index table, the base station comprising:
a processor arranged to determine a CQI index table among a plurality of CQI index tables, at least one of which includes one or more CQI index corresponding to a modulation of higher order that is not supported by another CQI index table; and
a transceiver configured to transmit CQI index table indication information to the UE, the CQI index table indication information indicating which CQI index table to be used for CQI calculation.
14. The base station according to claim 13 , wherein CQI index tables among the plurality of CQI index tables support same number of CQI indices.
15. The base station according to claim 13 , wherein CQI indices in CQI index tables among the plurality of CQI index tables are represented by the same bit length.
16. The base station according to claim 13 , wherein the at least one CQI index table includes CQI indices corresponding to all modulations that are supported by the other CQI index table.
17. The base station according to claim 13 , wherein the CQI index table indication information is transmitted via Radio Resource Control (RRC) signal.
18. The base station according to claim 13 , wherein the higher order of modulation is 256 QAM.
19. A method of wireless communication, comprising:
determining a Channel Quality Indicator (CQI) index table among a plurality of CQI tables, at least one of which includes one or more CQI index corresponding to a modulation of higher order that is not supported by another CQI index table; and
transmitting CQI index table indication information to a User Equipment (UE), the CQI index table indication information indicating which CQI index table to be used for CQI calculation.
20. The method according to claim 19 , wherein CQI index tables among the plurality of CQI tables support same number of CQI indices.
21. The method according to claim 19 , wherein CQI indices in CQI index tables among the plurality of CQI tables are represented by the same bit length.
22. The method according to claim 19 , wherein the at least one CQI index table includes CQI indices corresponding to all modulations that are supported by the other CQI index table.
23. The method according to claim 19 , wherein the CQI index table indication information is transmitted by a base station via Radio Resource Control (RRC) signal.
24. The method according to claim 19 , wherein the higher order of modulation is 256 QAM.