METHOD AND USER EQUIPMENT FOR TRANSMITTING CHANNEL QUALITY INDICATOR FEEDBACK

• US 20160218790A1
• Filed: 10/06/2014
• Published: 07/28/2016
• Est. Priority Date: 10/30/2013
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: HWANG, Daesung, KIM, Bonghoe, AHN, Joonkui, SEO, Dongyoun, YI, Yunjung
• Application Number:
  US15/026,527
• Publication Number:
  US 20160218790A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

According to one disclosure of the present specification, a method for transmitting a channel quality indicator (CQI) feedback is provided. The method comprises the steps of: receiving allocation information for a first uplink resource and allocation information for a second uplink resource; and selecting the type of a CQI table to be used for CQI feedback, wherein the type of the CQI table may comprise a first type of CQI table not including 256 quadrature amplitude modulation (QAM), and a second type of CQI table including the 256 QAM. The method comprises the steps of: selecting from the first and the second uplink resources according to the type of the CQI table which has been selected; and transmitting the CQI feedback based on the selected CQI table from the selected uplink resource in an uplink subframe.

Claims

1. A method for transmitting a channel quality indicator (CQI) feedback, comprising:

receiving allocation information on a first uplink resource and allocation information on a second uplink resource;

selecting a type of CQI table which is to be used for the CQI feedback, wherein the CQI table includes a first type CQI table that does not includes 256 quadrature amplitude modulation (QAM) and a second type CQI table that includes 256 QAM;

selecting one of the first and second uplink resources according to the selected CQI table; and

transmitting the CQI feedback based on the selected CQI table in the selected uplink resource on an uplink subframe.

2. The method of claim 1, wherein the first uplink resource is used when the CQI feedback is performed based on the first type CQI table that does not include the 256 QAM, and

wherein the second uplink resource is used when the CQI feedback is performed based on the second type CQI table that includes the 256 QAM.

3. The method of claim 1, wherein the CQI feedback is transmitted on a physical uplink control channel (PUCCH).

4. The method of claim 1, wherein the CQI feedback is transmitted using PUCCH format 2a or 2b, if a normal cyclic prefix (CP) is applied to the uplink subframe, and

wherein the CQI feedback is transmitted using PUCCH format 2, if an extended CP is applied to the uplink subframe.

5. The method of claim 1, wherein the second type CQI table further includes a field according to 256 QAM in addition to a field according to the first type CQI table.

6. The method of claim 1, wherein the CQI feedback based on the second type CQI table includes a CQI table of 4-bit length, and 1 bit that divides the second type CQI table.

7. A user equipment for transmitting a channel quality indicator (CQI) feedback, comprising:

a receiving unit configured to receive allocation information on a first uplink resource and allocation information on a second uplink resource;

a processor configured to select a type of CQI table which is to be used for the CQI feedback, and select one of the first and second uplink resources according to the selected CQI table, wherein the CQI table includes a first type CQI table that does not includes 256 quadrature amplitude modulation (QAM) and a second type CQI table that includes 256 QAM; and

a transmitting unit configured to transmit the CQI feedback based on the selected CQI table in the selected uplink resource on an uplink subframe.

8. The user equipment of claim 7, wherein the first uplink resource is used when the CQI feedback is performed based on the first type CQI table that does not include the 256 QAM, and

wherein the second uplink resource is used when the CQI feedback is performed based on the second type CQI table that includes the 256 QAM.

9. The user equipment of claim 7, wherein the CQI feedback is transmitted on a physical uplink control channel (PUCCH).

10. The user equipment of claim 7, wherein the CQI feedback is transmitted using PUCCH format 2a or 2b, if a normal cyclic prefix (CP) is applied to the uplink subframe, and

wherein the CQI feedback is transmitted using PUCCH format 2, if an extended CP is applied to the uplink subframe.

11. The user equipment of claim 7, wherein the second type CQI table further includes a field according to 256 QAM in addition to a field according to the first type CQI table.

12. The user equipment of claim 7, wherein the CQI feedback based on the second type CQI table includes a CQI table of 4-bit length, and 1 bit that divides the second type CQI table.