Method and apparatus for transmitting control information in wireless communication system

• US 10,615,946 B2
• Filed: 05/07/2015
• Issued: 04/07/2020
• 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
• Primary Examiner(s): Marcelo, Melvin C
• Assistant Examiner(s): Peguero, Natali Pascual
• Application Number:
  US15/305,138
• Publication Number:
  US 20170041123A1
• Time in Patent Office: 1,797 Days
• Field of Search: 370277, 370280, 370281, 370329
• 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, by a user equipment in a wireless communication system via a frequency division duplex (FDD) cell containing an uplink component carrier (UL CC) and a downlink component carrier (DL CC), the method comprising:

receiving subframe reconfiguration information on the UL CC,

wherein the UL CC includes only UL subframes,

wherein the subframe reconfiguration information indicates a subframe pattern including at least one UL subframe, DL subframe and special subframe,

wherein the subframe pattern is repeated in a unit of 8 subframes;

reconfiguring the UL subframes of the UL CC based on the subframe pattern;

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

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

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

wherein when the PDSCH is received on the DL subframe of the DL CC, the DCI does not comprise a DAI (downlink assignment index) field,

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI comprises the DAI field, and

wherein the DAI field indicates a counting value of the PDCCH related to the PDSCH received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC.

2. The method of claim 1,

wherein when the PDSCH is received on the DL CC, the DCI comprises a 3-bit HARQ process number field, and

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI comprises a 4-bit HARQ process number field.

3. The method of claim 1,

wherein when the PDSCH is received on the DL CC, the DCI is received via a common search space (CSS) or a UE-specific SS (USS), and

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI is received via only the USS.

4. The method of claim 1,

wherein the subframe reconfiguration information on the UL CC indicates UL-DL configuration, and

wherein subframe configuration of the UL CC is assigned as follows according to the UL-DL configuration.

5. The method of claim 4,

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of 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 (UE) configured to transmit control information via a frequency division duplex (FDD) cell containing a uplink component carrier (UL CC) and a downlink component carrier (DL CC) in a wireless communication system, the UE comprising:

transmitter and receiver; and

a processor, operatively coupled to the transmitter and receiver, wherein the processor is configured to;

control the receiver to receive subframe reconfiguration information on the UL CC,

wherein the UL CC includes only UL subframes,

wherein the subframe reconfiguration information indicates a subframe pattern including at least one UL subframe, DL subframe and special subframe,

wherein the subframe pattern is repeated in a unit of 8 subframes;

reconfigure the UL subframes of the UL CC based on the subframe pattern;

control the receiver to receive a physical downlink control channel (PDCCH) containing downlink control information (DCI) on the FDD cell;

control the receiver to receive a physical downlink shared channel (PDSCH) indicated by the PDCCH on the FDD cell; and

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

wherein when the PDSCH is received on the DL subframe of the DL CC, the DCI does not comprise a DAI (downlink assignment index) field,

wherein when the PDSCH is received on subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI comprises the DAI field, and

wherein the DAI field indicates a counting value of the PDCCH related to the PDSCH received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC.

7. The UE of claim 6,

wherein when the PDSCH is received on the DL CC, the DCI comprises a 3-bit HARQ process number field, and

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI comprises a 4-bit HARQ process number field.

8. The UE of claim 6,

wherein when the PDSCH is received on the DL CC, the DCI is received via a common search space (CSS) or a UE-specific SS (USS), and

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of the UL CC, the DCI is received via only the USS.

9. The UE of claim 6,

wherein the subframe reconfiguration information on the UL CC indicates time division duplex (TDD) UL-DL configuration, and

wherein subframe configuration of the UL CC is assigned as follows according to the TDD UL-DL configuration.

10. The UE of claim 9,

wherein when the PDSCH is received on the DL subframe or the special subframe of the UL CC included in reconfigured subframes of 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: