METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20170041123A1
• Filed: 05/07/2015
• Published: 02/09/2017
• Est. Priority Date: 05/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suckchel, Seo, Hanbyul, Ahn, Joonkui, Lee, Seungmin
• Granted Patent: US 10,615,946 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

The present invention relates to a wireless communication system. The present invention more particularly relates to a method for transmitting control information in an FDD cell by a device, and an apparatus for same, the method comprising the steps of: receiving SF reconfiguration information about a UL CC; receiving on the FDD cell a PDCCH comprising DCI; receiving on the FDD cell a PDSCH indicated by means of the PDCCH; and transmitting, on the UL CC, HARQ-ACK information about the PDSCH, wherein if the PDSCH has been received on the DL CC, the DCI does not comprise a DAI field and if the PDSCH has been received on the UL CC, the DCI comprises the DAI field.

Claims

1. A method of transmitting control information, which is transmitted by a user equipment in a wireless communication system via a FDD cell containing a UL CC (uplink component carrier) and a DL CC (downlink component carrier), comprising the steps of:

receiving SF (subframe) reconfiguration information on the UL CC, wherein the SF reconfiguration information indicates an SF pattern which is repeated in a unit of 8 SFs;

receiving PDCCH (physical downlink control channel) containing DCI (downlink control information) on the FDD cell;

receiving PDSCH (physical downlink shared channel) indicated by the PDCCH on the FDD cell; and

transmitting HARQ-ACK (hybrid automatic repeat request acknowledgement) information on the UL CC in response to the PDSCH,

wherein if the PDSCH is received on the DL CC, the DCI does not comprise a DAI (downlink assignment index) field and wherein if the PDSCH is received on the UL CC, the DCI comprises the DAI field.

2. The method of claim 1, wherein if the PDSCH is received on the DL CC, the DCI comprises a 3-bit HARQ process number field and wherein if the PDSCH is received on the UL CC, the DCI comprises a 4-bit HARQ process number field.

3. The method of claim 1, wherein if the PDSCH is received on the DL CC, the DCI is received via a CSS (common search space) or a USS (UE-specific SS) and wherein if the PDSCH is received on the UL CC, the DCI is received via the USS only.

4. The method of claim 1, wherein the SF reconfiguration information on the UL CC indicates UL-DL configuration and wherein SF configuration of the UL CC is assigned as follows according to the UL-DL configuration.

5. The method of claim 4, wherein if the PDSCH is received on the UL CC, a timing relationship between the PDSCH and the HARQ-ACK follows a timing relationship of UL-DL configuration #1-1, #2-1, or #2-2 and wherein a timing relationship according to the UL-DL configuration is given as follows:

6. A user equipment configured to transmit control information via a FDD cell containing a UL CC (uplink component carrier) and a DL CC (downlink component carrier) in a wireless communication system, comprising:

an RF (radio frequency) unit; and

a processor, the processor configured to receive SF (subframe) reconfiguration information on the UL CC, wherein the SF reconfiguration information indicates an SF pattern which is repeated in a unit of 8 SFs, the processor configured to receive PDCCH (physical downlink control channel) containing DCI (downlink control information) on the FDD cell, the processor configured to receive PDSCH (physical downlink shared channel) indicated by the PDCCH on the FDD cell, the processor configured to transmit HARQ-ACK (hybrid automatic repeat request acknowledgement) information on the UL CC in response to the PDSCH,

wherein if the PDSCH is received on the DL CC, the DCI does not comprise a DAI (downlink assignment index) field and wherein if the PDSCH is received on the UL CC, the DCI comprises the DAI field.

7. The user equipment of claim 6, wherein if the PDSCH is received on the DL CC, the DCI comprises a 3-bit HARQ process number field and wherein if the PDSCH is received on the UL CC, the DCI comprises a 4-bit HARQ process number field.

8. The user equipment of claim 6, wherein if the PDSCH is received on the DL CC, the DCI is received via a CSS (common search space) or a USS (UE-specific SS) and wherein if the PDSCH is received on the UL CC, the DCI is received via the USS only.

9. The user equipment of claim 6, wherein the SF reconfiguration information on the UL CC indicates TDD (time division duplex) UL-DL configuration and wherein SF configuration of the UL CC is assigned as follows according to the TDD UL-DL configuration:

10. The user equipment of claim 9, wherein if the PDSCH is received on the UL CC, a timing relationship between the PDSCH and the HARQ-ACK follows a timing relationship of TDD UL-DL configuration #2, #3, #4 or #5 and wherein a timing relationship according to the TDD UL-DL configuration is given as follows: