Method for transmitting multiplexed HARQ feedbacks in a carrier aggregation system and a device therefor

• US 10,187,184 B2
• Filed: 01/13/2016
• Issued: 01/22/2019
• 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
• Primary Examiner(s): Rachedine, Mohammed
• Application Number:
  US15/535,147
• Publication Number:
  US 20170373800A1
• Time in Patent Office: 1,105 Days
• Field of Search: 455 24, 4555501, 455422
• 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 served by a network,

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

wherein the at least two cells are associated with a respective priority;

generating a Hybrid Automatic Repeat Request (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 based on the priority; and

transmitting the generated HARQ feedback on the selected cell.

2. The method according to claim 1, wherein the selected cell has a highest priority among priorities of the at least two cells with the PUCCH resources.

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

receiving the priority of the at least two cells with the PUCCH resources via Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling from the network.

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

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

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

5. The method according to claim 4, wherein the threshold is received from the network via Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling.

6. 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 cell for which the PUCCH resource is configured, the UE configures the cell with the PUCCH resource according to the signaling.

7. 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 negative acknowledgement (NACK) if a cell is in deactivated state, and

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

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

a transceiver; and

a processor configured to;

configure with a plurality of cells served by a network,

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

wherein the at least two cells are associated with a respective priority,

generate a Hybrid Automatic Repeat Request (HARQ) feedback by multiplexing the HARQ feedbacks of all of the plurality of cells configured for the UE,

select a cell among the at least two cells with the PUCCH resources based on the priority, and

transmit, via the transceiver, the generated HARQ feedback on the selected cell.

9. The UE according to claim 8, wherein the selected cell has a highest priority among priorities of the at least two cells with the PUCCH resources.

10. The UE according to claim 8, wherein the UE receives the priority of the at least two cells with the PUCCH resources via Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling from the network.

11. The UE according to claim 8, wherein the cell selected among the at least two cells with the PUCCH resources is not a Primary Cell (PCell), or

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

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

12. The UE according to claim 11, wherein the threshold is received from the network via a Physical layer (PHY), Medium Access Control (MAC), or Radio Resource Control (RRC) signaling.

13. The UE according to claim 8, wherein when the processor receives a signaling including an indication of the PUCCH resource, or an indication of the cell for which the PUCCH resource is configured, the processor configures the cell with the PUCCH resource according to the signaling.

14. The UE according to claim 8, 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 a negative acknowledgement (NACK) if a cell is in deactivated state, and

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