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

• US 20160204905A1
• Filed: 01/13/2016
• Published: 07/14/2016
• 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 10,014,984 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1628 List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers H04L1/1614 takes precedence
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0001 Arrangements for dividing the transmission path duplexing H04L5/14; multiplexing of different sources on one path H04J
• 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 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands

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 a first cell with PUCCH resource and a second cell with PUCCH resource; configuring zero or more third cells without PUCCH resource; generating a first HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the first cell and third cells associated with the first cell; generating a second HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the second cell and third cells associated with the second cell; and transmitting the first HARQ feedback on the first cell with PUCCH resource and the second HARQ feedback on the second cell with PUCCH resource.

Claims

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

grouping a plurality of cells belonging to an enhanced-NodeB (eNB) to a first Physical Uplink Control Channel (PUCCH) group and a second PUCCH group, wherein each of the plurality of cells belongs to one of the first PUCCH group and the second PUCCH group;

configuring a first cell with PUCCH resource in the first PUCCH group and a second cell with PUCCH resource in the second PUCCH group;

generating a first Hybrid-ARQ (HARQ) feedback by multiplexing HARQ feedbacks of all HARQ processes of all cells belonging to the first PUCCH group;

generating a second HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of all cells belonging to the second PUCCH group; and

transmitting the first HARQ feedback on the first cell with PUCCH resource and the second HARQ feedback on the second cell with PUCCH resource.

2. The method according to claim 1, wherein the first PUCCH group comprises the first cell and zero or more cells without PUCCH resource, and the second PUCCH group comprises the second cell and zero or more cells without PUCCH resource.

3. The method according to claim 1, wherein when the UE multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the first PUCCH group, the UE considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH Group as ACK (Acknowlegdement) if the HARQ process successfully decodes a received TB (Transport Block), and the UE considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH group as NACK (Negative-Acknowledgement) if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB, and when the UE multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the second PUCCH group, the UE considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as ACK if the HARQ process successfully decodes a received TB, and the UE considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as NACK if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB.

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

configuring a first cell with Physical Uplink Control Channel (PUCCH) resource and a second cell with PUCCH resource, wherein the first cell and the second cell belong to an enhanced-NodeB (eNB);

configuring zero or more third cells without PUCCH resource, wherein the zero or more third cells without PUCCH resource are associated with one of the first cell and the second cell;

generating a first HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the first cell and third cells associated with the first cell;

generating a second HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the second cell and third cells associated with the second cell; and

transmitting the first HARQ feedback on the first cell with PUCCH resource and the second HARQ feedback on the second cell with PUCCH resource.

5. The method according to claim 4, wherein when the UE configures the first cell, the UE receives an indication indicating which cells of the zero or more third cells without PUCCH resource are to be associated with the first cell.

6. The method according to claim 5, wherein when the UE configures the first cell, if the UE doesn'"'"'t receive the indication, the first cell is not associated with any of the zero or more third cells.

7. The method according to claim 4, wherein when the UE configures the second cell, the UE receives an indication indicating which cells of the zero or more third cells without PUCCH resource are to be associated with the second cell.

8. The method according to claim 4, wherein when the UE configures a third cell among the zero or more third cells, the UE receives an indication indicating which cell with PUCCH resource is to be associated with the third cell.

9. The method according to claim 8, wherein when the UE configures the third cell among the zero or more third cells, if the UE doesn'"'"'t receive the indication, the third cell is associated with a Primary-Cell (PCell).

10. The method according to claim 4, wherein when the UE multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the first PUCCH group, the UE considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH Group as ACK (Acknowlegdement) if the HARQ process successfully decodes a received TB (Transport Block), and the UE considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH group as NACK (Negative-Acknowledgement) if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB, and when the UE multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the second PUCCH group, the UE considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as ACK if the HARQ process successfully decodes a received TB, and the UE considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as NACK if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB.

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

a Radio Frequency (RF) module; and

a processor configured to control the RF module,

wherein the processor is configured to group a plurality of cells to a first Physical Uplink Control Channel (PUCCH) group and a second PUCCH group, wherein the plurality of cells belong to an enhanced-NodeB (eNB), to configure a first cell with PUCCH resource in the first PUCCH group and a second cell with PUCCH resource in the second PUCCH group, to generate a first Hybrid-ARQ (HARQ) feedback by multiplexing HARQ feedbacks of all HARQ processes of all cells belonging to the first PUCCH group, to generate a second HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of all cells belonging to the second PUCCH group, and to transmit the first HARQ feedback on the first cell with PUCCH resource and the second HARQ feedback on the second cell with PUCCH resource.

12. The UE according to claim 11, wherein the first PUCCH group comprises the first cell and zero or more cells without PUCCH resource, and the second PUCCH group comprises the second cell and zero or more cells without PUCCH resource.

13. The UE according to claim 11, wherein when the processor generates the first HARQ feedback, only if a HARQ process successfully decodes a received TB, the UE considers the first HARQ feedback as ACK, and if a HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB, the processor considers the first HARQ feedback as NACK.

when the processor generates the second HARQ feedback, only if a HARQ process successfully decodes a received TB, the UE considers the second HARQ feedback as ACK, and if a HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB, the processor considers the second HARQ feedback as NACK.

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

a Radio Frequency (RF) module; and

a processor configured to control the RF module,

wherein the processor is configured to configure a first cell with Physical Uplink Control Channel (PUCCH) resource and a second cell with PUCCH resource, wherein the first cell and the second cell belong to an enhanced-NodeB (eNB), to configure zero or more third cells without PUCCH resource, wherein the zero or more third cells without PUCCH resource are associated with one of the first cell and the second cell, to generate a first HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the first cell and third cells associated with the first cell, to generate a second HARQ feedback by multiplexing HARQ feedbacks of all HARQ processes of the second cell and third cells associated with the second cell, and to transmit the first HARQ feedback on the first cell with PUCCH resource and the second HARQ feedback on the second cell with PUCCH resource.

15. The UE according to claim 14, wherein when the processor configures the first cell, the processor receives an indication indicating which cells of the zero or more third cells without PUCCH resource are to be associated with the first cell.

16. The UE according to claim 15, wherein when the processor configures the first cell, if the processor doesn'"'"'t receive the indication, the first cell is not associated with any of the zero or more third cells.

17. The UE according to claim 14, wherein when the processor configures the second cell, the processor receives an indication indicating which cells of the zero or more third cells without PUCCH resource are to be associated with the second cell.

18. The UE according to claim 14, wherein when the processor configures a third cell among the zero or more third cells, the processor receives an indication indicating which cell with PUCCH resource is to be associated with the third cell.

19. The UE according to claim 18, wherein when the processor configures the third cell among the zero or more third cells, if the processor doesn'"'"'t receive the indication, the third cell is associated with a Primary-Cell (PCell).

20. The UE according to claim 14, wherein when the processor multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the first PUCCH group, the processor considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH Group as ACK (Acknowlegdement) if the HARQ process successfully decodes a received TB (Transport Block), and the processor considers HARQ feedback of a HARQ process of a cell belonging to the first PUCCH group as NACK (Negative-Acknowledgement) if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB, and

when the processor multiplexes the HARQ feedbacks of all HARQ processes of all cells belonging to the second PUCCH group, the processor considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as ACK if the HARQ process successfully decodes a received TB, and the processor considers HARQ feedback of a HARQ process of a cell belonging to the second PUCCH group as NACK if the HARQ process is allocated to a deactivated cell, or a HARQ process has not received any TB, or a HARQ process fails in decoding the received TB.