Method and apparatus for receiving ACK/NACK in wireless communication system

• US 9,780,940 B2
• Filed: 09/29/2016
• Issued: 10/03/2017
• Est. Priority Date: 09/26/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Dongyoun, Yi, Yunjung, Seo, Hanbyul, Ahn, Joonkui
• Primary Examiner(s): Sam, Phirin
• Application Number:
  US15/280,576
• Publication Number:
  US 20170019232A1
• Time in Patent Office: 369 Days
• Field of Search: None
• 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 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

The present invention provides a method for receiving acknowledgement/not-acknowledgement (ACK/NACK) of a terminal in a wireless communication system. The method transmits uplink data through an uplink data channel and receives ACK/NACK for the uplink data. The uplink data channel is transmitted through aggregated carriers and the aggregated carriers include a first band recognizable to first and second type terminals and a second band recognizable only to the second type terminal.

Claims

1. A method of communication by a user equipment (UE) in a wireless communication system, the method comprising:

receiving physical hybrid-ARQ indicator channel (PHICH) information indicating PHICH duration of a subframe; and

receiving enhanced-physical downlink control channel (E-PDCCH) information indicating a starting orthogonal frequency division multiplexing (OFDM) symbol of an E-PDCCH in the subframe via a radio resource control (RRC) message,

wherein the starting OFDM symbol of the E-PDCCH indicated by the E-PDCCH information in the subframe is configured after the PHICH duration indicated by the PHICH information in the subframe.

2. The method of claim 1, wherein the PHICH information indicating the PHICH duration is received via another RRC message.

3. The method of claim 1, wherein the PHICH duration is normal PHICH duration or extended PHICH duration.

4. The method of claim 3, wherein if the PHICH duration is the normal PHICH duration and the subframe is a non-Multicast-broadcast single frequency network (MBSFN) subframe, the value of the PHICH duration is 1.

5. The method of claim 3, wherein if the PHICH duration is normal PHICH and the subframe is a Multicast-broadcast single-frequency network (MBSFN) subframe on a carrier supporting a Physical Downlink Shared Channel (PDSCH), the value of the PHICH duration is 1.

6. The method of claim 1, wherein acknowledgement/not-acknowledgement (ACK/NACK) for uplink data which is transmitted from the UE is received during the PHICH duration.

7. A user equipment (UE), the UE comprising:

a radio frequency (RF) unit that transmits and receives a radio signal; and

a processor that controls the RF unit to;

receive physical hybrid-ARQ indicator channel (PHICH) information indicating PHICH duration of a subframe; and

receive enhanced-physical downlink control channel (E-PDCCH) information indicating a starting orthogonal frequency division multiplexing (OFDM) symbol of an E-PDCCH in the subframe via a radio resource control (RRC) message,

wherein the starting OFDM symbol of the E-PDCCH indicated by the E-PDCCH information in the subframe is configured after the PHICH duration indicated by the PHICH information in the subframe.

8. The UE of claim 7, wherein the PHICH information indicating the PHICH duration is received via another RRC message.

9. The method of claim 7, wherein acknowledgement/not-acknowledgement (ACK/NACK) for uplink data which is transmitted from the UE is received during the PHICH duration.

10. The UE of claim 7, wherein the PHICH duration is normal PHICH duration or extended PHICH duration.

11. The UE of claim 10, wherein if the PHICH duration is the normal PHICH duration and the subframe is a non-Multicast-broadcast single frequency network (MBSFN) subframe, the value of the PHICH duration is 1.

12. The UE of claim 10, wherein if the PHICH duration is the normal PHICH and the subframe is a Multicast-broadcast single-frequency network (MBSFN) subframe on a carrier supporting a Physical Downlink Shared Channel (PDSCH), the value of the PHICH duration is 1.