METHOD AND USER DEVICE FOR RECEIVING DOWNLINK SIGNAL, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNAL

• US 20150245344A1
• Filed: 07/31/2013
• Published: 08/27/2015
• Est. Priority Date: 07/31/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: You, Hyangsun, Seo, Dongyoun, Yi, Yunjung, Ahn, Joonkui, Yang, Suckchel
• Granted Patent: US 9,544,885 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• 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 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention relates to a method and user device for transmitting first ACK/NACK information on a first cell group including a primary cell and one or more secondary cells from among a plurality of serving cells on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and to a method and base station for receiving the first ACK/NACK information on the PUCCH of the specific cell. When the first ACK/NACK information includes only ACIQNACK for the primary cell, the specific cell is the primary cell, and, when the first ACK/NACK information includes ACK/NACK on at least one of the one or more secondary cells, the specific cell is a secondary cell from among the one or more secondary cells of the first cell group that is set for the ACK/NACK transmission.

Claims

1. A method for transmitting uplink control information by a user equipment in which multiple cells are configured, the method comprising:

generating first acknowledgement(ACK)/negative acknowledgement (NACK) information for a first cell group including a primary cell and one or more secondary cells among the multiple cells; and

transmitting the first ACK/NACK information on a physical uplink control channel (PUCCH) of a specific cell in the first cell group,

wherein the specific cell is the primary cell when the first ACK/NACK information includes only ACK/NACK for the primary cell, and the specific cell is a first secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the first cell group when the first ACK/NACK information includes ACK/NACK for at least one of the one or more secondary cells of the first cell group.

2. The method according to claim 1,

wherein the first ACK/NACK information is transmitted on the first secondary cell using PUCCH format 3 when the first ACK/NACK information includes ACK/NACK for at least one of the one or more secondary cells of the first cell group.

3. The method according to claim 2,

wherein the user equipment operates in frequency division duplex (FDD), and the first ACK/NACK information is transmitted on the primary cell using PUCCH format 1a/1b when the first ACK/NACK information includes only ACK/NACK for the primary cell.

4. The method according to claim 2,

wherein the user equipment operates in time division duplex (TDD),

the first ACK/NACK information is transmitted on the primary cell using PUCCH format 1a/1b when the first ACK/NACK information includes only ACK/NACK for the primary cell, wherein the first ACK/NACK information includes only ACK/NACK for a physical downlink control channel (PDCCH) in which a downlink assignment index (DAI) for the primary cell is 1, and

the first ACK/NACK information is transmitted on the primary cell using PUCCH format 3 when the first ACK/NACK information includes only ACK/NACK for the primary cell, wherein the first ACK/NACK information includes ACK/NACK for a PDCCH in which the DAI for the primary cell is greater than 1 (DAI>

1).

5. The method according to claim 1,

wherein the user equipment operates in frequency division duplex (FDD),

generates second ACK/NACK information for a second cell group including only one or more secondary cells other than the secondary cells belonging to the first cell group among the multiple cells, and

transmits the secondary ACK/NACK information on a PUCCH of a second secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the secondary cell group, and

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 3 when the second ACK/NACK information includes ACK/NACK for a cell other than the second secondary cell, and the second ACK/NACK information is transmitted using PUCCH format 1a/1b when the second ACK/NACK information includes only ACK/NACK for the second secondary cell.

6. The method according to claim 1,

wherein the user equipment operates in time division duplex (TDD),

generates second ACK/NACK information for a second cell group including only one or more secondary cells other than the secondary cells belonging to the first cell group among the multiple cells, and

transmits the secondary ACK/NACK information on a PUCCH of a second secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the secondary cell group,

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 1a/1b when the second ACK/NACK information includes only ACK/NACK for the second secondary cell, wherein the second ACK/NACK information includes only ACK/NACK for a physical downlink control channel (PDCCH) in which a downlink assignment index (DAI) for the second secondary cell is 1, and

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 3 when the second ACK/NACK information includes only ACK/NACK for the second secondary cell, wherein the second ACK/NACK information includes ACK/NACK for a PDCCH in which the DAI for the second secondary cell is greater than 1 (DAI>

1).

7. A user equipment in which multiple cells are configured to transmit uplink control information, the user equipment comprising:

a radio frequency (RF) unit, and

a processor configured to control the RF unit,

wherein the processor generates first acknowledgement(ACK)/negative acknowledgement (NACK) information for a first cell group including a primary cell and one or more secondary cells among the multiple cells; and

controls the RF unit to cause the RF unit to the first ACK/NACK information on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and

wherein the specific cell is the primary cell when the first ACK/NACK information includes only ACK/NACK for the primary cell, and the specific cell is a first secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the first cell group when the first ACK/NACK information includes ACK/NACK for at least one of the one or more secondary cells of the first cell group.

8. The user equipment according to claim 7,

wherein the first ACK/NACK information is transmitted on the first secondary cell using PUCCH format 3 when the first ACK/NACK information includes ACK/NACK for at least one of the one or more secondary cells of the first cell group.

9. The user equipment according to claim 8,

wherein the user equipment operates in frequency division duplex (FDD), and

the first ACK/NACK information is transmitted on the primary cell using PUCCH format 1a/1b when the first ACK/NACK information includes only ACK/NACK for the primary cell.

10. The user equipment according to claim 8,

wherein the user equipment operates in time division duplex (TDD),

the first ACK/NACK information is transmitted on the primary cell using PUCCH format 1a/1b when the first ACK/NACK information includes only ACK/NACK for the primary cell, wherein the first ACK/NACK information includes only ACK/NACK for a physical downlink control channel (PDCCH) in which a downlink assignment index (DAI) for the primary cell is 1, and

the first ACK/NACK information is transmitted on the primary cell using PUCCH format 3 when the first ACK/NACK information includes only ACK/NACK for the primary cell, wherein the first ACK/NACK information includes ACK/NACK for a PDCCH in which the DAI for the primary cell is greater than 1 (DAI>

1).

11. The user equipment according to claim 7,

wherein the user equipment operates in frequency division duplex (FDD),

generates second ACK/NACK information for a second cell group including only one or more secondary cells other than the secondary cells belonging to the first cell group among the multiple cells, and

transmits the secondary ACK/NACK information on a PUCCH of a second secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the secondary cell group, and

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 3 when the second ACK/NACK information includes ACK/NACK for a cell other than the second secondary cell, and the second ACK/NACK information is transmitted using PUCCH format 1a/1b when the second ACK/NACK information includes only ACK/NACK for the second secondary cell.

12. The user equipment according to claim 7,

wherein the user equipment operates in time division duplex (TDD),

generates second ACK/NACK information for a second cell group including only one or more secondary cells other than the secondary cells belonging to the first cell group among the multiple cells, and

transmits the secondary ACK/NACK information on a PUCCH of a second secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the secondary cell group,

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 1a/1b when the second ACK/NACK information includes only ACK/NACK for the second secondary cell, wherein the second ACK/NACK information includes only ACK/NACK for a physical downlink control channel (PDCCH) in which a downlink assignment index (DAI) for the second secondary cell is 1, and

wherein the second ACK/NACK information is transmitted on the second secondary cell using PUCCH format 3 when the second ACK/NACK information includes only ACK/NACK for the second secondary cell, wherein the second ACK/NACK information includes ACK/NACK for a PDCCH in which the DAI for the second secondary cell is greater than 1 (DAI>

1).

13. A method for receiving uplink control information by a base station from a user equipment in which multiple cells are configured, the method comprising:

performing one or more downlink transmissions through a first cell group including a primary cell and one or more secondary cells among the multiple cells, and

receiving first ACK/NACK information for the first cell group on a physical uplink control channel (PUCCH) of a specific cell in the first cell group,

wherein the specific cell is the primary cell when the one or more downlink transmissions include a downlink transmission on the primary cell, and the specific cell is a first secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the first cell group when the one or more downlink transmissions include a downlink transmission on at least one of the one or more secondary cells of the first cell group.

14. A base station for receiving uplink control information from a user equipment in which multiple cells are configured, the base station comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein processor performs one or more downlink transmissions through a first cell group including a primary cell and one or more secondary cells among the multiple cells, and

receives first ACK/NACK information for the first cell group on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and

wherein the specific cell is the primary cell when the one or more downlink transmissions include a downlink transmission on the primary cell, and the specific cell is a first secondary cell configured for ACK/NACK transmission among the one or more secondary cells of the first cell group when the one or more downlink transmissions include a downlink transmission on at least one of the one or more secondary cells of the first cell group.