Method for transmitting uplink signals

• US 8,102,833 B2
• Filed: 09/11/2008
• Issued: 01/24/2012
• Est. Priority Date: 09/13/2007
• Status: Active Grant

• Current Assignee: Optis Cellular Technology LLC (Brevet Capital)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Park, Hyun Wook, Lee, Dae Won, Kim, Bong Hoe, Yun, Young Woo, Kim, Ki Jun, Roh, Dong Wook
• Primary Examiner(s): Ferris, Derrick
• Assistant Examiner(s): YEUNG, MANG HANG
• Application Number:
  US12/209,136
• Publication Number:
  US 20090097466A1
• Time in Patent Office: 1,230 Days
• Field of Search: 370/206, 370/278, 370/344, 370/208, 370/252, 370/294, 370/295, 370/315, 370/319, 370/328, 370/329, 370/330, 370/335, 370/336, 370/338, 455/450, 455/509
• US Class Current: 370/344
• CPC Class Codes: H04L 1/0081 Formats specially adapted to avoid errors in the feedback channel H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1664 the supervisory signal being transmitted together with payload signals; piggybacking
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• 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: H04L 5/0057 Physical resource allocation for CQI

Abstract

A method for transmitting uplink signals, which include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, is disclosed. The method comprises serially multiplexing the control signals and the data signals; sequentially mapping the multiplexed signals within a specific resource region in accordance with a time-first mapping method, the specific resource region including a plurality of symbols and a plurality of virtual subcarriers; and arranging the ACK/NACK signals at both symbols near symbols to which a reference signal of the plurality of symbols is transmitted. Thus, the uplink signals can be transmitted to improve receiving reliability of signals having high priority.

Claims

1. A method for transmitting uplink signals comprising control signals and data signals in a wireless communication system, the method comprising:

(a) serially multiplexing first control signals and data signals in a mobile station, wherein the first control signals are placed at a front part of the multiplexed signals and the data signals are placed at a rear part of the multiplexed signals;

(b) mapping the multiplexed signals to a 2-dimensional resource matrix comprising a plurality of columns and a plurality of rows, wherein the columns and the rows of the 2-dimensional resource matrix correspond to single carrier frequency divisional multiple access (SC-FDMA) symbols and subcarriers for each SC-FDMA symbol, respectively, wherein a number of columns of the 2-dimensional resource matrix corresponds to a number of SC-FDMA symbols within one subframe except specific SC-FDMA symbols used for a reference signal, and wherein the multiplexed signals are mapped from the first column of the first row to the last column of the first row, the first column of the second row to the last column of the second row, and so on, until all the multiplexed signals are mapped to the 2-dimensional resource matrix

(c) mapping ACK/NACK control signals to specific columns of the 2-dimensional resource matrix, wherein the specific columns correspond to SC-FDMA symbols right adjacent to the specific SC-FDMA symbols, wherein the ACK/NACK control signals overwrite some of the multiplexed signals mapped to the 2-dimensional resource matrix at step (b) from the last row of the specific columns; and

(d) transmitting the signals mapped to the 2-dimensional resource matrix at steps (b) and (c) by column by column to a base station.

2. The method of claim 1, wherein the first control signals comprise at least one of:

precoding matrix index (PMI) signals;

or

channel quality indicator (CQI) signals.

3. The method of claim 1, wherein one subframe comprises two slots, wherein the specific SC-FDMA symbols correspond to fourth SC-FDMA symbols out of seven SC-FDMA symbols in each slot.

4. The method of claim 1, wherein the ACK/NACK control signals are transmitted via subcarriers corresponding to third SC-FDMA symbols and fifth SC-FDMA symbols out of seven SC-FDMA symbols in each slot.

5. The method of claim 1, wherein the ACK/NACK control signals are channel coded independently of the data signals or first control signals.

6. The method of claim 1, wherein the step (d) comprises:

respectively performing a discrete Fourier transform (DFT) for the signals mapped to each column of the 2-dimensional resource matrix signals;

respectively performing an inverse fast Fourier transform (IFFT) on the DFT-transformed signals corresponding to the signals mapped to each column of the 2-dimensional resource matrix signals;

respectively attaching a cyclic prefix to the IFFT-transformed signals corresponding to the signals mapped to each column of the 2-dimensional resource matrix signals; and

transmitting the cyclic prefix attached signals to the base station.

7. The method of claim 1, wherein the signals mapped to the 2-dimensional resource matrix are transmitted through a physical uplink shared channel (PUSCH).

8. A mobile station for transmitting uplink signals comprising control signals and data signals in a wireless communication system, the mobile station comprising:

a processor serially multiplexing first control signals and data signals, wherein the first control signals are placed at a front part of the multiplexed signals and the data signals are placed at a rear part of the multiplexed signals;

the processor mapping the multiplexed signals to a 2-dimensional resource matrix comprising a plurality of columns and a plurality of rows, wherein the columns and the rows of the 2-dimensional resource matrix correspond to single carrier frequency divisional multiple access (SC-FDMA) and subcarriers for each SC-FDMA symbol, respectively, wherein a number of columns of the 2-dimensional resource matrix corresponds to a number of SC-FDMA symbols within one subframe except specific SC_FDMA symbols used for a reference signal, and wherein the multiplexed signals are mapped from the first column of the first row to the last column of the first row, the first column of the second row to the last column of the second row, and so on, until all the multiplexed signals are mapped to the 2-dimensional resource matrix; and

the processor mapping ACK/NACK control signals to specific columns of the 2-dimensional resource matrix, wherein the specific columns correspond to SC-FDMA symbols right adjacent to the specific SC-FDMA symbols, wherein the ACK/NACK control signals overwrite some of the multiplexed signals mapped to the 2-dimensional resource matrix from the last row of the specific columns.

9. The mobile station of claim 8, wherein the first control signals comprise at least one of:

precoding matrix index (PMI) signals;

or

channel quality indicator (CQI) signals.

10. The mobile station of claim 8, wherein one subframe comprises two slots, wherein the specific SC-FDMA symbols correspond to fourth SC-FDMA symbols out of seven SC-FDMA symbols in each slot.

11. The mobile station of claim 8, wherein the ACK/NACK control signals are transmitted via subcarriers corresponding to third SC-FDMA symbols and fifth SC-FDMA symbols out of seven SC-FDMA symbols in each slot.

12. The mobile station of claim 8, wherein the ACK/NACK control signals are channel coded independently of the data signals or first control signals.

13. The mobile station of claim 8, wherein the processor further adapted for:

respectively performing, a discrete Fourier transform (DFT) the signals mapped to each column of the 2-dimensional resource matrix signals;

respectively performing an inverse fast Fourier transform (IFFT) on the DFT-transformed signals corresponding to the signals mapped to each column of the 2-dimensional resource matrix signals;

respectively attaching a cyclic prefix to the IFFT-transformed signals corresponding to the signals mapped to each column of the 2-dimensional resource matrix signals; and

transmitting the cyclic prefix attached signals to a base station.

14. The mobile station of claim 8, wherein the signals mapped to the 2-dimensional resource matrix are transmitted through a physical uplink shared channel (PUSCH).