METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM

• US 20120307760A1
• Filed: 01/12/2011
• Published: 12/06/2012
• Est. Priority Date: 01/17/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seung Hee, Chung, Jae Hoon, Moon, Sung Ho, Lee, Moon Il
• Granted Patent: US 8,867,469 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 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0019 in which one code is applied, as a temporal sequence, to all frequencies
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention provides a method and apparatus for transmitting uplink control information (UCI) by user equipment in a wireless communication. The user equipment performs channel coding on information bits of the UCI to generate encoding information bits; performs modulation on the thus generated encoding information bits to generate complex modulation symbols; spreads the complex modulation symbols block-wise to a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols based on an orthogonal sequence; and transmits the spread complex modulation symbols to a base station.

Claims

1. A method for transmitting uplink control information (UCI) by a user equipment on a physical uplink control channel (PUCCH) in a wireless communication system, the method comprising:

performing channel coding on information bits of the UCI to generate encoding information bits, wherein the information bits of the UCI include concatenation of hybrid automatic repeat request (HARQ)-ACK (acknowledgement) information bits for each of serving cells and a scheduling request (SR), and wherein the SR is appended at the end of the concatenated HARQ-ACK information bits;

scrambling the encoding information bits based on a user equipment (UE)-specific scrambling sequence to generate scrambled bits;

modulating the scrambled bits to generate complex modulation symbols;

block-wise spreading the complex modulation symbols on the basis of an orthogonal sequence; and

transmitting the spread complex modulation symbols to a base station.

2. The method of claim 1,

wherein a number of the HARQ-ACK information bits for each of serving cells is 1 bit.

3. The method of claim 1,

wherein a number of the HARQ-ACK information bit for each of serving cells is 2 bits.

4. The method of claim 3, wherein one of the HARQ-ACK information bits for each of serving cells corresponds to an HARQ-ACK information bit for a first codeword, and

wherein the remaining bit of the HARQ-ACK information bits for each of serving cells corresponds to an HARQ-ACK information bit for a second codeword.

5. The method of claim 1, wherein the SR is one bit.

6. The method of claim 1, wherein if the SR is 1, it indicates a presence of an SR transmission event, and if the SR is 0, it indicates an absence of the SR transmission event.

7. The method of claim 1, wherein the complex modulation symbols is block-wise is spread to multiple single carrier frequency division multiple access (SC-FDMA) symbols.

8. The method of claim 7, wherein a number of the multiple SC-FDMA symbols for each slot in a subframe is 5.

9. The method of claim 7, wherein a number of the multiple SC-FDMA symbols for a first slot in a subframe is 5, and

wherein a number of the multiple SC-FDMA symbols for a second slot in the subframe is 4.

10. The method of claim 1, further comprising transmitting an uplink reference signal by using at least two SC-FDMA symbols per slot.

11. The method of claim 10, wherein phase modulation with −

1 is performed on at least one uplink reference signal among uplink reference signals transmitted by using the at least two SC-FDMA symbols.

12. The method of claim 1, further comprising transmitting a sounding reference signal (SRS) by using at least one SC-FDMA symbol per subframe.

13. The method of claim 12, wherein a length of the orthogonal code is determined based on the number of SC-FDMA symbols for transmitting the SRS.

14. The method of claim 1, wherein the orthogonal code is any one of a Walsh code or a discrete Fourier transform (DFT) code.

15. A user equipment comprising:

a radio frequency (RF) unit for transmitting or receiving a radio signal; and

a processor coupled to the RF unit,

wherein the processor is configured for;

performing channel coding on information bits of uplink control information (UCI) to generate encoding information bits, wherein the information bits of the UCI include concatenation of hybrid automatic repeat request (HARQ)-ACK (acknowledgement) information bits for each of serving cells and a scheduling request (SR), and wherein the SR is appended at the end of the concatenated HARQ-ACK information bits;

scrambling the encoding information bits based on a user equipment (UE)-specific scrambling sequence to generate scrambled bits;

modulating the scrambled bits to generate complex modulation symbols;

block-wise spreading the complex modulation symbols on the basis of an orthogonal sequence; and

transmitting the spread complex modulation symbols to a base station.