METHOD AND APPARATUS FOR MONITORING CONTROL CHANNEL

• US 20140376395A1
• Filed: 01/16/2013
• Published: 12/25/2014
• Est. Priority Date: 01/16/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Seo, Han Byul
• Granted Patent: US 9,609,675 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2627 Modulators
• 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 5/0048 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 5/1469 using time-sharing
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers

Abstract

Provided are a method and an apparatus for monitoring a control channel in a sub-frame including a plurality of orthogonal frequency division multiplexings (OFDMs) in a time division duplex (TDD)-based wireless communication system. A wireless device monitors a downlink control channel in at least one OFDM symbol after an OFDM symbol receives a primary synchronization signal (PSS) in the sub-frame.

Claims

1. A method for monitoring a control channel in a subframe including a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time division duplex (TDD)-based wireless communication system, the method comprising:

monitoring, by a wireless device, a downlink control channel in at least one OFDM symbol located after an OFDM symbol in which a primary synchronization signal (PSS) is received in the subframe; and

receiving, by the wireless device, downlink control information on the downlink control channel.

2. The method of claim 1, wherein the OFDM symbol in which the PSS is received is a 3^rd OFDM symbol of the subframe.

3. The method of claim 2, wherein the downlink control channel is monitored in at least one resource block (RB) on which the PSS is received in a frequency domain.

4. The method of claim 3, wherein the subframe is a 7^th subframe in a radio frame including 10 subframes.

5. The method of claim 4, wherein the subframe is a downlink subframe.

6. The method of claim 4, wherein the subframe is a special subframe.

7. The method of claim 4, wherein a demodulation reference signal used to demodulate the downlink control channel is received in at least one OFDM symbol in which the downlink control channel is monitored.

8. The method of claim 7, wherein a location of the demodulation reference signal in the subframe is different from a location of a demodulation reference signal in another subframe.

9. A wireless device for monitoring a control channel in a subframe including a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time division duplex (TDD)-based wireless communication system, the wireless device comprising:

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

a processor operatively coupled to the RF unit and configured to;

monitor a downlink control channel in at least one OFDM symbol located after an OFDM symbol in which a primary synchronization signal (PSS) is received in the subframe; and

receive downlink control information on the downlink control channel.

10. The wireless device of claim 9, wherein the OFDM symbol in which the PSS is received is a 3^rd OFDM symbol of the subframe.

11. The wireless device of claim 10, wherein the downlink control channel is monitored in at least one resource block (RB) on which the PSS is received in a frequency domain.

12. A method for transmitting downlink control information in a subframe including a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time division duplex (TDD)-based wireless communication system, the method comprising:

transmitting, by a base station, a primary synchronization signal (PSS) in a 3^rd OFDM symbol in the subframe; and

transmitting, by the base station, the downlink control information on a downlink control channel in at least one OFDM symbol located after the 3^rd OFDM symbol in the subframe.