Method and apparatus for configuring channel quality indicator and method and apparatus for configuring modulation and coding scheme

Patent metadata

Field	Value
Publication number	US-11258569-B2
Application number	US-202016807821-A
Country	US
Kind code	B2
Filing date	Mar 3, 2020
Priority date	Mar 22, 2013
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

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.

First claim

What is claimed is:

1. A User Equipment (UE) comprising:
a first Channel Quality Indicator (CQI) index table and a second CQI index table, the first CQI index table including one or more CQI index corresponding to a modulation of higher order that is not supported by the second CQI index table and including CQI indices corresponding to all modulations that are supported by the second CQI index table;
a receiver configured to receive from a base station CQI index table indication information indicating to use the first CQI index table for CQI selection; and
a processor configured to select a CQI index by using the first CQI index table on receiving by the CQI index table indication information and to feed back the selected CQI index to the base station.

2. The UE according to claim 1 , wherein the CQI index tables support same number of CQI indices.

3. The UE according to claim 1 , wherein CQI indices in the CQI index tables are represented by the same bit length.

4. The UE according to claim 1 , wherein the CQI index table indication information is received via Radio Resource Control (RRC) signal.

5. The UE according to claim 1 , wherein the higher order of modulation is 256 QAM.

6. The UE according to claim 1 , wherein the processor is further configured to select a CQI index by using the second CQI index table unless the receiver receives the CQI index table indication information from the base station and to feed back the selected CQI index to the base station.

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 to use a first CQI index table to use for CQI selection wherein,
the first a CQI index table includes one or more CQI index corresponding to a modulation of higher order that is not supported by a second CQI index table and includes CQI indices corresponding to all modulations that are supported by the second CQI index table;
selecting a CQI index by using the first CQI index table on receiving the CQI index table indication information; and
feeding back the selected CQI index to the base station.

8. The method according to claim 7 , wherein the CQI index tables support same number of CQI indices.

9. The method according to claim 7 , wherein CQI indices in the CQI index tables are represented by the same bit length.

10. The method according to claim 7 , wherein the CQI index table indication information is received via Radio Resource Control (RRC) signal.

11. The method according to claim 7 , wherein the higher order of modulation is 256 QAM.

12. The method according to claim 7 , further comprising
selecting a CQI index by using the second CQI index table on not receiving the CQI index table indication information from the base station.

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 first CQI index table from the first CQI index table and second CQI index table, wherein the first CQI index table includes one or more CQI index corresponding to a modulation of higher order that is not supported by the second CQI index table and including CQI indices corresponding to all modulations that are supported by the second CQI index table, and
to receive CQI index selected and fed back by the User Equipment; and
a transceiver configured to transmit CQI index table indication information to the UE, the Ca index table indication information indicating to use the first CQI index table for CQI selection.

14. The base station according to claim 13 , wherein the CQI index tables support same number of CQI indices.

15. The base station according to claim 13 , wherein CQI indices in the CQI index tables are represented by the same bit length.

16. The base station according to claim 13 , wherein the CQI index table indication information is transmitted via Radio Resource Control (RRC) signal.

17. The base station according to claim 13 , wherein the higher order of modulation is 256 QAM.

18. The base station according to claim 13 , wherein the transceiver is further configured not to transmit the CQI index table indication information to the UE when the processor determines the second CQI index table from the first CQI index table and the second CQI index table.

19. A method of wireless communication, comprising:
determining a first Channel Quality Indicator (CQI) index table from the first CQI table and a second CQI index table, wherein the first CQI index table includes one or more CQI index corresponding to a modulation of higher order that is not supported by the second CQI index table and including CQI indices corresponding to all modulations that are supported by the second CQI index table;
transmitting CQI index table indication information to a User Equipment (UE), the CQI index table indication information indicating to use the first CQI index table for CQI selection; and
receiving a CQI index selected and fed back by the User Equipment.

20. The base station according to claim 19 , wherein the CQI index tables support same number of CQI indices.

Assignees

• Fujitsu Connected Tech Ltd

Inventors

• Zhang Lei
• Wang Yi
• Lu Yanling
• Zhou Hua

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04L1/0016 Primary

  involving special memory structures, e.g. look-up tables · CPC title

• H04L1/0028

  Formatting · CPC title

• H04L5/0057 Primary

  Physical resource allocation for CQI · CPC title