METHOD FOR DETECTING HARQ/NACK FEEDBACK SIGNAL FROM REPEATER

• US 20120026935A1
• Filed: 04/19/2010
• Published: 02/02/2012
• Est. Priority Date: 04/17/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Kyu Jin, Kwon, Yeong Hyeon, Chung, Jae Hoon, Cho, Han Gyu, Moon, Sung Ho
• Granted Patent: US 8,995,329 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0097 Relays

Abstract

Disclosed is a repeater apparatus for detecting a downlink HARQ ACK/NACK feedback signal from a base station. An RF (Radio Frequency) unit receives specific channel configuration information which includes offset information indicating the starting point of a specific channel to which said HARQ ACK/NACK feedback signal is transmitted from the base station and the position of the specific channel allocated for an exclusive use of said repeater apparatus within said specific channel from said start point, and receives the HARQ ACK/NACK feedback signal from said base station for an uplink transmission of said repeater. The processor detects said specific channel allocated for exclusive use of the repeater apparatus based on said received specific channel configuration information thereby decoding said received HARQ ACK/NACK feedback signal.

Claims

1. A method for detecting a Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement/Negative ACKnowledgement (ACK/NACK) feedback signal at a relay node (RN) in a mobile communication system, the method comprising:

receiving, from an evolved Node B (eNode B), specific channel configuration information including a starting point of a specific channel in which the HARQ ACK/NACK feedback signal is transmitted and offset information indicating, with respect to the starting point of the specific channel, a position in the specific channel at which a specific channel dedicated to the RN is allocated;

receiving, from the eNode B, an HARQ ACK/NACK feedback signal for uplink transmission; and

detecting the specific channel dedicated to the RN based on the received specific channel configuration information and decoding the received HARQ ACK/NACK feedback signal.

2. The method according to claim 1, further comprising:

receiving predefined code index information for the HARQ ACK and/or HARQ NACK signal from the eNode B; and

determining whether the received HARQ ACK/NACK feedback signal is an ACK or a NACK based on the code index information and a code index applied to the received HARQ ACK/NACK feedback signal.

3. The method according to claim 1, wherein the RN receives the specific channel configuration information from the eNode B through one of higher layer signaling, a broadcast channel, and a physical downlink control channel for the RN.

4. The method according to claim 1, wherein the starting point of the specific channel is indicated by a Resource Block (RB) index.

5. The method according to claim 1, wherein, the received HARQ ACK/NACK feedback signal corresponds to each of the plurality of multiple layers when uplink transmission by the RN is transmission of a plurality of code blocks through a plurality of multiple layers.

6. The method according to claim 1, wherein the specific channel is transmitted while being included in a physical downlink control channel for the RN.

7. A Relay Node (RN) apparatus for detecting a Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement/Negative ACKnowledgement (ACK/NACK) feedback signal in a mobile communication system, the RN apparatus comprising:

a Radio Frequency (RF) unit for receiving, from an evolved Node B (eNode B), specific channel configuration information including a starting point of a specific channel in which the HARQ ACK/NACK feedback signal is transmitted and offset information indicating, with respect to the starting point of the specific channel, a position in the specific channel at which a specific channel dedicated to the RN apparatus is allocated and receiving, from the eNode B, an HARQ ACK/NACK feedback signal for uplink transmission; and

a processor for detecting the specific channel dedicated to the RN apparatus based on the received specific channel configuration information and decoding the received HARQ ACK/NACK feedback signal.

8. The RN apparatus according to claim 7, wherein the RF unit receives predefined code index information for the HARQ ACK and/or HARQ NACK signal from the eNode B and the processor determines whether the received HARQ ACK/NACK feedback signal is an ACK or a NACK based on the code index information and a code index applied to the received HARQ ACK/NACK feedback signal.

9. The RN apparatus according to claim 7, wherein the RF unit receives the specific channel configuration information from the eNode B through one of higher layer signaling, a broadcast channel, and a physical downlink control channel for the RN.

10. The RN apparatus according to claim 7, wherein the starting point of the specific channel is indicated by a Resource Block (RB) index.

11. The RN apparatus according to claim 7, wherein the received HARQ ACK/NACK feedback signal corresponds to each of the plurality of multiple layers when uplink transmission by the RN apparatus is transmission of a plurality of code blocks through a plurality of multiple layers.

12. The RN apparatus according to claim 7, wherein the specific channel is transmitted while being included in a physical downlink control channel for the RN.