Method and user device for receiving uplink control information, and method and base station for transmitting uplink information

• US 9,930,646 B2
• Filed: 10/10/2013
• Issued: 03/27/2018
• Est. Priority Date: 10/10/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: You, Hyangsun, Yi, Yunjung, Kim, Bonghoe, Yang, Suckchel
• Primary Examiner(s): Sheikh, Ayaz
• Assistant Examiner(s): Hsiung, Hai-Chang
• Application Number:
  US14/427,191
• Publication Number:
  US 20150249980A1
• Time in Patent Office: 1,629 Days
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• 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: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention determines a PUCCH resource based on which serving cell ACK/NACK information is related to, when a user device set as a plurality of serving cells transmits the ACK/NACK information. Moreover, if a PUCCH transmission time matches with a PUSCH transmission time, the present invention does not piggy back ACK/NACK information to PUSCH but transmits the ACK/NACK information through PUCCH.

Claims

1. A method for transmitting uplink control information by a user equipment, the method comprising:

receiving, by the user equipment, serving cell configuration information for an addition of one or more secondary cells (SCells);

configuring a first cell group and a second cell group based on the serving cell configuration information; and

transmitting acknowledgement (ACK)/negative acknowledgement (NACK) information for the second cell group through a serving cell belonging to the second cell group in an uplink subframe,

wherein the user equipment is configured with a plurality of serving cells, and the plurality of serving cells includes a primary cell (PCell) and the one or more SCells,

wherein the first cell group includes at least the PCell and the second cell group includes at least one SCell, that does not belong to the first cell group, and no PCell,

wherein the serving cell configuration information includes group information indicating to which group, between the first cell group and the second cell group, each of the one or more SCells belongs,

wherein the serving cell configuration information further includes information indicating a special SCell configured for physical uplink control channel (PUCCH) transmission among SCells belonging to the second cell group,

wherein the ACK/NACK information is for the second cell group other than the first cell group,

wherein the ACK/NACK information is transmitted through a PUCCH on the special SCell,

wherein the ACK/NACK information is transmitted using a first PUCCH format when the ACK/NACK information is for a data channel received only on the special SCell among the SCells belonging to the second cell group, and

wherein the ACK/NACK information is transmitted using a second PUCCH format when the ACK/NACK information is for at least one data channel received on an SCell other than the special SCell among the SCells belonging to the second cell group.

2. The method according to claim 1, wherein the ACK/NACK information is transmitted using a PUCCH resource determined based on a transmit power control (TPC) command field carried by a physical downlink control channel (PDCCH) scheduling an SCell other than the special SCell among the SCells belonging to the second cell group.

3. The method according to claim 1, wherein the first cell group and the second cell group are managed by separate base stations.

4. The method according to claim 1, wherein, when there is a physical uplink shared channel (PUSCH) to be transmitted in the uplink subframe, the PUSCH is dropped in the uplink subframe when the PUSCH is configured on the first cell group and the PUSCH is transmitted in the uplink subframe when the PUSCH is configured on the second cell group.

5. A user equipment for transmitting uplink control information, the user equipment comprising:

a radio frequency (RF) unit and a processor that;

controls the RF unit to receive serving cell configuration information for an addition of one or more secondary cells (SCells);

configures a first cell group and a second cell group based on the serving cell configuration information; and

controls the RF unit to transmit acknowledgement (ACK)/negative acknowledgement (NACK) information for the second cell group through a serving cell belonging to the second cell group in an uplink subframe,

wherein the user equipment is configured with a plurality of serving cells, and the plurality of serving cells includes a primary cell (PCell) and the one or more SCells,

wherein the first cell group includes at least the PCell and the second cell group includes at least one SCell, that does not belong to the first cell group, and no PCell,

wherein the serving cell configuration information includes group information indicating to which group, between the first cell group and the second cell group, each of the one or more SCells belongs,

wherein the serving cell configuration information further includes information indicating a special SCell configured for physical uplink control channel (PUCCH) transmission among SCells belonging to the second cell group,

wherein, the ACK/NACK information is for the second cell group other than the first cell group,

wherein the ACK/NACK information is transmitted through a PUCCH on the special SCell,

wherein the ACK/NACK information is transmitted using a first PUCCH format when the ACK/NACK information is for a data channel received only on the special SCell among the SCells belonging to the second cell group, and

wherein the ACK/NACK information is transmitted using a second PUCCH format when the ACK/NACK information is for at least one data channel received on an SCell other than the special SCell among the SCells belonging to the second cell group.

6. The user equipment according to claim 5, wherein the ACK/NACK information is transmitted using a PUCCH resource determined based on a transmit power control (TPC) command field carried by a physical downlink control channel (PDCCH) scheduling an SCell other than the special SCell among the SCells belonging to the second cell group.

7. The user equipment according to claim 5, wherein the first cell group and the second cell group are managed by separate base stations.

8. The user equipment according to claim 5, wherein, when there is a physical uplink shared channel (PUSCH) to be transmitted in the uplink subframe, the PUSCH is dropped in the uplink subframe when the PUSCH is configured on the first cell group and the PUSCH is transmitted in the uplink subframe when the PUSCH is configured on the second cell group.

9. A method for receiving uplink control information by a base station, the method comprising:

transmitting serving cell configuration information for an addition of one or more secondary cells (SCells); and

receiving acknowledgement (ACK)/negative acknowledgement (NACK) information for a second cell group through a serving cell belonging to the second cell group in an uplink subframe from a user equipment configured with a first cell group and the second cell group,

wherein the user equipment is configured with a plurality of serving cells, and the plurality of serving cells includes a primary cell (PCell) and the one or more SCells,

wherein the first cell group includes at least the PCell and the second cell group includes at least one SCell, that does not belong to the first cell group, and no PCell,

wherein the serving cell configuration information includes group information indicating to which group, between the first cell group and the second cell group, each of the one or more SCells belongs,

wherein the serving cell configuration information further includes information indicating a special SCell configured for physical uplink control channel (PUCCH) transmission among SCells belonging to the second cell group,

wherein the ACK/NACK information is for the second cell group other than the first cell group,

wherein the ACK/NACK information is received through a PUCCH on the special SCell,

wherein the ACK/NACK information is received using a first PUCCH format when the ACK/NACK information is for a data channel transmitted only on the special SCell among the SCells belonging to the second cell group, and

wherein the ACK/NACK information is received using a second PUCCH format when the ACK/NACK information is for at least one data channel received on an SCell other than the special SCell among the SCells belonging to the second cell group.

10. The method according to claim 9, wherein the ACK/NACK information is received using a PUCCH resource determined based on a transmit power control (TPC) command field carried by a physical downlink control channel (PDCCH) scheduling an SCell other than the special SCell among the SCells belonging to the second cell group.

11. The method according to claim 9, wherein the first cell group and the second cell group are managed by separate base stations.

12. The method according to claim 9, wherein, when there is a physical uplink shared channel (PUSCH) to be received in the uplink subframe, reception of the PUSCH is dropped in the uplink subframe when the PUSCH is configured on the first cell group and the PUSCH is received in the uplink subframe when the PUSCH is configured on the second cell group.

13. A base station for receiving uplink control information, the base station comprising:

a radio frequency (RF) unit and a processor that;

controls the RF unit to transmit serving cell configuration information for an addition of one or more secondary cells (SCells); and

controls the RF unit to receive acknowledgement (ACK)/negative acknowledgement (NACK) information for a second cell group through a serving cell belonging to the second cell group in an uplink subframe from a user equipment configured with a first cell group and the second cell group,

wherein the user equipment is configured with a plurality of serving cells, and the plurality of serving cells includes a primary cell (PCell) and the one or more SCells,

wherein the first cell group includes at least the PCell and the second cell group includes at least one SCell, that does not belong to the first cell group, and no PCell,

wherein the serving cell configuration information includes group information indicating to which group, between the first cell group and the second cell group, each of the one or more SCells belongs,

wherein the serving cell configuration information further includes information indicating a special SCell configured for physical uplink control channel (PUCCH) transmission among SCells belonging to the second cell group,

wherein the ACK/NACK information is for the second cell group other than the first cell group,

wherein the ACK/NACK information is received on a PUCCH on the special SCell,

wherein the ACK/NACK information is received using a first PUCCH format when the ACK/NACK information is for a data channel transmitted only on the special SCell among the SCells belonging to the second cell group, and

wherein the ACK/NACK information is received using a second PUCCH format when the ACK/NACK information is for at least one data channel received on an SCell other than the special SCell among the SCells belonging to the second cell group.

14. The base station according to claim 13, wherein the ACK/NACK information is received using a PUCCH resource determined based on a transmit power control (TPC) command field carried by a physical downlink control channel (PDCCH) scheduling an SCell other than the special SCell among the SCells belonging to the second cell group.

15. The base station according to claim 13, wherein the first cell group and the second cell group are managed by separate base stations.

16. The base station according to claim 13, wherein, when there is a physical uplink shared channel (PUSCH) to be received in the uplink subframe, reception of the PUSCH is dropped in the uplink subframe when the PUSCH is configured on the first cell group and the PUSCH is received in the uplink subframe when the PUSCH is configured on the second cell group.