METHOD AND APPARATUS FOR RECEIVING ACK/NACK IN WIRELESS COMMUNICATION SYSTEM

• US 20150256316A1
• Filed: 09/26/2013
• Published: 09/10/2015
• 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
• Granted Patent: US 9,497,012 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 receiving acknowledgement/not-acknowledgement (ACK/NACK) of a terminal in a wireless communication system, the method comprising:

transmitting uplink data through an uplink data channel; and

receiving ACK/NACK for the uplink data,

wherein the uplink data channel is transmitted through aggregated carriers, and

wherein 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.

2. The method of claim 1, wherein a resource constructing a downlink channel for receiving the ACK/NACK is determined on the basis of a resource block having a lowest index constituting the uplink data channel.

3. The method of claim 1, wherein resource blocks included in the first band are indexed in order, and then a next index is used for indexing resource blocks included in the second band.

4. The method of claim 3, wherein the resource blocks included in the first band are indexed in the same indexing order applied to the first type terminal which operates only in the first band.

9. The method of claim 1, wherein the first type terminal supports only an operation in the first band, and the second type terminal supports operations in the first band and the second band.

5. A communication method of a terminal in a wireless communication system, the method comprising:

receiving physical hybrid-ARQ indicator channel (PHICH) information indicating a time duration of a downlink channel for receiving acknowledgement/not-acknowledgement (ACK/NACK) through system information; and

receiving information indicating a starting position of an enhanced-physical downlink control channel (E-PDCCH) through a radio resource control (RRC) message.

6. The method of claim 5, wherein the E-PDCCH is a control channel located in a region to which a data channel is allocated.

7. The method of claim 5, wherein an orthogonal frequency division multiplexing (OFDM) symbol at which the E-PDCCH starts is determined on the basis of a greater value between the PHICH information and information indicating a starting position of the E-PDCCH.

8. The method of claim 5, wherein an OFDM symbol at which the E-PDCCH starts is determined on the basis of a smaller value between the PHICH information and information indicating a starting position of the E-PDCCH.

10. A terminal comprising:

a radio frequency (RF) unit for transmitting and receiving a radio signal; and

a processor operatively coupled to the RF unit,

wherein the processor is configured for;

transmitting uplink data through an uplink data channel; and

receiving acknowledgement/not-acknowledgement (ACK/NACK) for the uplink data,

wherein the uplink data channel is transmitted through aggregated carriers, and

wherein 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.