METHOD AND DEVICE FOR REPORTING CHANNEL STATE INFORMATION

• US 20150146634A1
• Filed: 05/16/2013
• Published: 05/28/2015
• Est. Priority Date: 05/17/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Seo, Dongyoun, Ahn, Joonkui
• Granted Patent: US 9,692,573 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

A method and device for reporting channel state information (CSI) is provided. A wireless device codes uplink control information (UCI) including CSI to create encoded UCI and transmits the encoded UCI. When the CSI includes a rank indicator (RI), the payload size of the CSI is determined according to the RI, and if the CSI does not include the RI, the payload size of the CSI is fixed.

Claims

1. A method of reporting channel state information (CSI) in a wireless communication system, the method comprising:

receiving a configuration for CSI reporting, the configuration including a periodicity and an offset;

determining a subframe in which the CSI is reported among a plurality of subframes according to the configuration;

generating the CSI;

coding uplink control information (UCI) containing the CSI to generate encoded UCI;

modulating the encoded UCI to generate a modulation sequence; and

transmitting the modulation sequence in the determined subframe on an uplink channel,

wherein, if the CSI includes a rank indicator (RI), a payload size of the CSI is determined according to the RI, and

wherein, if the CSI does not include the RI, the payload size of the CSI is fixed.

2. The method of claim 1, wherein if the CSI does not include the RI, the CSI includes at least one padding bit.

3. The method of claim 2, wherein if the CSI does not include the RI, the CSI includes a channel quality indicator (CQI) and a precoding matrix indicator (PMI).

4. The method of claim 3, wherein the at least one padding bit is attached to a least significant bit (LSB) of the CSI.

5. The method of claim 3,

wherein the at least one padding bit includes a first padding bit and a second padding bit, and

wherein the first padding bit is attached to the CQI, and the second padding bit is attached to the PMI.

6. The method of claim 1, wherein the UCI is encoded based on a Reed-Muller (RM) code.

7. The method of claim 3, wherein the UCI is encoded based on a (20, A) RM code or a (32, A) RM code.

8. The method of claim 7, wherein the uplink channel is a physical uplink control channel (PUCCH).

9. A wireless device for reporting channel state information (CSI) in a wireless communication system, the wireless device comprising:

a memory; and

a processor operatively coupled to the memory and configured to;

receive a configuration for CSI reporting, the configuration including a periodicity and an offset;

determine a subframe in which the CSI is reported among a plurality of subframes according to the configuration;

generate the CSI;

code uplink control information (UCI) containing the CSI to generate encoded UCI;

modulate the encoded UCI to generate a modulation sequence; and

transmit the modulation sequence in the determined subframe on an uplink channel,

wherein, if the CSI includes a rank indicator (RI), a payload size of the CSI is determined according to the RI, and

wherein, if the CSI does not include the RI, the payload size of the CSI is fixed.

10. The wireless device of claim 9, wherein if the CSI does not include the RI, the CSI includes at least one padding bit.

11. The wireless device of claim 10, wherein if the CSI does not include the RI, the CSI includes a channel quality indicator (CQI) and a precoding matrix indicator (PMI).

12. The wireless device of claim 11,

wherein the at least one padding bit includes a first padding bit and a second padding bit, and

wherein the first padding bit is attached to the CQI, and the second padding bit is attached to the PMI.