METHOD FOR ENABLING TERMINAL TO TRANSMIT AND RECEIVE SIGNAL IN WIRELESS COMMUNICATIONS SYSTEM AND APPARATUS THEREFOR

• US 20160007324A1
• Filed: 03/18/2014
• Published: 01/07/2016
• Est. Priority Date: 03/19/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Seungmin, SEO, Hanbyul, CHAE, Hyukjin, HWANG, Daesung, SEO, Inkwon
• Granted Patent: US 10,306,611 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• 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 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

The present invention relates to a method for enabling a terminal to transmit and receive a signal in a wireless communications system and an apparatus therefor. More specifically, the method includes the steps of: receiving physical downlink shared channel (PDSCH) data and reconfiguration downlink control information (DCI); and transmitting at least one of the information of ACK/NACK (acknowledgement/Negative Acknowledgement) for downlink data and the answer message corresponding to the reconfiguration downlink control information, characterized in that the answer message represents whether to succeed in receiving the reconfiguration downlink control information.

Claims

1. In a user equipment of a wireless communication system, a method of transceiving signals, comprising the steps of:

receiving downlink data (physical downlink shared channel, PDSCH) and a reconfiguration downlink control information (reconfiguration DCI); and

transmitting at least one of an ACK/NACK (acknowledgement/negative acknowledgement) information in response to the downlink data and a confirmation message in response to the reconfiguration downlink control information,

wherein the confirmation message indicates success or failure in receiving the reconfiguration downlink control information.

2. The method of claim 1, wherein the ACK/NACK information is transmitted based on a channel selection scheme.

3. The method of claim 2, wherein if the confirmation message and the ACK/NACK information are transmitted in a same subframe, the confirmation message is bundled with the ACK/NACK information.

4. The method of claim 2, wherein the confirmation message is bundled with an ACK/NACK information corresponding to a codeword transmitted in a predefined specific downlink subframe.

5. The method of claim 2, wherein if the confirmation message and the ACK/NACK information are transmitted in a same subframe, the confirmation message is considered to indicate ACK/NACK in response to the downlink data.

6. The method of claim 5, wherein the subframe having the ACK/NACK information transmitted therein is determined based on a lowest control channel element index of a control channel related to the downlink data and wherein the control channel corresponds to either PDCCH (physical downlink control channel) or EPDCCH (enhanced PDCCH).

7. The method of claim 2, wherein if the downlink data is transmitted in form of a single codeword, the confirmation message is transmitted using an uplink resource interconnected to the downlink data only.

8. The method of claim 2, wherein if the confirmation message is transmitted through an uplink resource differently configured depending on ACK/NACK in response to the downlink data.

9. The method of claim 2, wherein the ACK/NACK information in response to the downlink data is bundled and wherein the confirmation message is transmitted through an uplink resource configured depending on the bundled ACK/NACK information.

10. The method of claim 2, wherein if the number of downlink subframes interconnected to a specific uplink subframe is equal to or greater than 3, the confirmation message is transmitted through an uplink resource interconnected to a lowest control channel element index in case of a DAI field of a downlink DCI format set to 3 or 4.

11. The method of claim 1, wherein the ACK/NACK information is transmitted based on a PUCCH format 3.

12. The method of claim 1, wherein the ACK/NACK information is transmitted based on PUSCH (physical uplink shared channel).

13. A user equipment, which transceives signals in a wireless communication system, comprising:

a radio frequency unit; and

a processor configured to receive downlink data (physical downlink shared channel, PDSCH) and a reconfiguration downlink control information (reconfiguration DCI), the processor configured to transmit at least one of an ACK/NACK (acknowledgement/negative acknowledgement) information in response to the downlink data and a confirmation message in response to the reconfiguration downlink control information,

wherein the confirmation message indicates success or failure in receiving the reconfiguration downlink control information.