METHOD FOR TRANSMITTING MULTIPLEXED HARQ FEEDBACKS IN A CARRIER AGGREGATION SYSTEM AND A DEVICE THEREFOR

• US 20170373800A1
• Filed: 01/13/2016
• Published: 12/28/2017
• Est. Priority Date: 01/14/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Sunyoung, YI, Seungjune
• Granted Patent: US 10,187,184 B2
• Time in Patent Office: Days
• 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 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• 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 5/0062 Avoidance of ingress interference, e.g. ham radio channels

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting multiplexed HARQ feedbacks in a carrier aggregation system, the method comprising: configuring with a plurality of cells, wherein at least two cells of the plurality of cells are configured with Physical Uplink Control Channel (PUCCH) resources, respectively; generating a Hybrid-ARQ (HARQ) feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE; selecting a cell among the at least two cells with the PUCCH resources; and transmitting the generated HARQ feedback on the selected cell.

Claims

1. A method for a User Equipment (UE) operating in a wireless communication system, the method comprising:

configuring with a plurality of cells, wherein at least two cells of the plurality of cells are configured with Physical Uplink Control Channel (PUCCH) resources, respectively;

generating a Hybrid-ARQ (HARQ) feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE;

selecting a cell among the at least two cells with the PUCCH resources; and

transmitting the generated HARQ feedback on the selected cell.

2. The method according to claim 1, wherein when the UE selects the cell among the at least two cells with the PUCCH resource to transmit the generated HARQ feedback,

the UE randomly selects the cell with the PUCCH resource with equal probability, or

the UE selects the cell with the PUCCH resource which has a highest priority, or

the UE selects the cell with the PUCCH resource which a best downlink cell channel quality, or

the UE selects the cell with the PUCCH resource having a highest or the lowest cell index.

3. The method according to claim 2, wherein the channel quality corresponds to Reference Signal Received Power (RSRP) or Reference Signal Received Quality (RSRQ).

4. The method according to claim 2, wherein before the UE selects the cell with the PUCCH resource which has a highest priority, the UE receives the priority of the at least two cell with the PUCCH resources by receiving a Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling from a network.

5. The method according to claim 1, wherein the cell selected among the at least two cells with the PUCCH resources is not a PCell, or

the cell selected among the at least two cells with the PUCCH resources is not a cell with worst channel quality, or

the cell selected among the at least two cells with the PUCCH resources is not a cell having channel quality being worse than a threshold.

6. The method according to claim 5, wherein the threshold is received from a network via a Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling.

7. The method according to claim 1, wherein when the UE receives a signaling including an indication of the PUCCH resource, or an indication of the a cell for which the PUCCH resource is configured, the UE configures the cell with the PUCCH resource according to the signaling.

8. The method according to claim 1, wherein when the UE generates the HARQ feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE, the UE considers a HARQ feedback as NACK if a cell is in deactivated state, and the UE considers a HARQ feedback as either ACK or NACK depending on decoding result of a received transport block if a cell is in activated state.

9. A User Equipment (UE) operating in a wireless communication system, the UE comprising:

a Radio Frequency (RF) module; and

a processor configured to control that RF module,

wherein the processor is configured to configure with a plurality of cells, wherein at least two cells of the plurality of cells are configured with Physical Uplink Control Channel (PUCCH) resources, respectively, to generate a Hybrid-ARQ (HARQ) feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE, to select a cell among the at least two cells with the PUCCH resources, and to transmit the generated HARQ feedback on the selected cell.

10. The UE according to claim 9, wherein when the processor selects the cell among the at least two cells with the PUCCH resource to transmit the generated HARQ feedback,

the processor randomly selects the cell with the PUCCH resource with equal probability, or

the processor selects the cell with the PUCCH resource which has a highest priority, or

the processor selects the cell with the PUCCH resource which a best downlink cell channel quality, or

the processor selects the cell with the PUCCH resource having a highest or the lowest cell index.

11. The UE according to claim 10, wherein the channel quality corresponds to Reference Signal Received Power (RSRP) or Reference Signal Received Quality (RSRQ).

12. The UE according to claim 10, wherein before the processor selects the cell with the PUCCH resource which has a highest priority, the UE receives the priority of the at least two cell with the PUCCH resources by receiving a Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling from a network.

13. The UE according to claim 9, wherein the cell selected among the at least two cells with the PUCCH resources is not a PCell, or

the cell selected among the at least two cells with the PUCCH resources is not a cell with worst channel quality, or

the cell selected among the at least two cells with the PUCCH resources is not a cell having channel quality being less than a threshold.

14. The UE according to claim 13, wherein the threshold is received from a network via a Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling.

15. The UE according to claim 9, wherein when the processor receives a signaling including an indication of the PUCCH resource, or an indication of the a cell for which the PUCCH resource is configured, the processor configures the cell with the PUCCH resource according to the signaling.

16. The UE according to claim 9, wherein when the processor generates the HARQ feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE, the processor considers a HARQ feedback as NACK if a cell is in deactivated state, and

the processor considers a HARQ feedback as either ACK or NACK depending on decoding result of a received transport block if a cell is in activated state.