APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A WIRELESS ACCESS SYSTEM AND METHOD THEREOF

• US 20140133371A1
• Filed: 08/08/2012
• Published: 05/15/2014
• Est. Priority Date: 08/11/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Kyujin, Cho, Hangyu, Kim, Dongcheol, Chung, Jaehoon
• Granted Patent: US 9,425,940 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04L 27/2633 using partial FFTs
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 27/26522 using partial FFTs
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

Disclosed are an apparatus for transmitting and receiving downlink control information in a TDD (time division duplex) wireless access system and method thereof. The present invention includes performing a blind decoding on a transmitting region of e-PDCCH (enhanced physical downlink control channel) transmitted by being multiplexed with PDSCH (physical downlink shared channel) and receiving the DCI through the blind decoding of the e-PDCCH. In particular, a last symbol of the transmitting region of the e-PDCCH in a special subframe is configured in accordance with a configuration of the special subframe.

Claims

1. A method of receiving DCI (downlink control information) in a TDD (time division duplex) wireless access system, comprising the steps of:

performing a blind decoding on a transmitting region of e-PDCCH (enhanced physical downlink control channel) transmitted by being multiplexed with PDSCH (physical downlink shared channel); and

receiving the DCI through the blind decoding of the e-PDCCH,

wherein a last symbol of the transmitting region of the e-PDCCH in a special subframe is configured in accordance with a configuration of the special subframe.

2. The method of claim 1, wherein the last symbol of the transmitting region of the e-PDCCH in the special subframe is configured to a last symbol of DwPTS (downlink pilot time slot) in accordance with the configuration of the special subframe.

3. The method of claim 1, wherein if the configuration of the special subframe sets 1 to 4 and 6 to 8, the last symbol of the transmitting region of the e-PDCCH in the special subframe is configured to a last symbol belonging to a 1^st slot of the special subframe.

4. The method of claim 1, wherein the DCI is transmitted on an extension component carrier in a carrier aggregation supportive wireless access system.

5. The method of claim 4, wherein in case of the special subframe, the DCI is transmitted on PDCCH (physical downlink control channel) or e-PDCCH of a component carrier performing cross carrier scheduling.

6. A user equipment, which receives DCI (downlink control information) in a TDD (time division duplex) wireless access system, comprising:

an RF (radio frequency) unit configured to transmit and receive a radio signal; and

a processor performing a blind decoding on a transmitting region of e-PDCCH (enhanced physical downlink control channel) transmitted by being multiplexed with PDSCH (physical downlink shared channel), receiving the DCI through the blind decoding of the e-PDCCH,

wherein a last symbol of the transmitting region of the e-PDCCH in a special subframe is configured in accordance with a configuration of the special subframe.

7. The user equipment of claim 6, wherein the last symbol of the transmitting region of the e-PDCCH in the special subframe is configured to a last symbol of DwPTS (downlink pilot time slot) in accordance with the configuration of the special subframe.

8. The user equipment of claim 6, wherein if the configuration of the special subframe sets 1 to 4 and 6 to 8, the last symbol of the transmitting region of the e-PDCCH in the special subframe is configured to a last symbol belonging to a 1^st slot of the special subframe.

9. The user equipment of claim 6, wherein the DCI is transmitted on an extension component carrier in a carrier aggregation supportive wireless access system.

10. The user equipment of claim 9, wherein in case of the special subframe, the DCI is transmitted on PDCCH (physical downlink control channel) or e-PDCCH of a component carrier performing cross carrier scheduling.