Method, base station, and user equipment for feeding back ACK/NACK information for carrier aggregation

• US 8,885,587 B2
• Filed: 06/02/2012
• Issued: 11/11/2014
• Est. Priority Date: 12/03/2009
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Chen, Xiaobo, Li, Chaojun
• Primary Examiner(s): Nooristany, Sulaiman
• Application Number:
  US13/487,172
• Publication Number:
  US 20120236812A1
• Time in Patent Office: 892 Days
• Field of Search: 370/329
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• 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 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a method, a base station, and a user equipment for feeding back ACK/NACK information for carrier aggregation. The method includes: configuring a common field preset in DCI as at least one type of command field related to ACK/NACK feedback of at least two types of command fields related to ACK/NACK feedback, where the common field can be configured as the command fields related to ACK/NACK feedback; and sending the DCI to a user equipment, so that the user equipment feeds back ACK/NACK information according to the DCI. The present invention may realize backward compatibility of the ACK/NACK information feedback with an LTE system in carrier aggregation.

Claims

1. A method for feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information for carrier aggregation, the method comprising:

configuring a common field preset in Downlink Control Information (DCI) as one command according to a type of a downlink component carrier transmitting the DCI, wherein the common field is indicative of one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; and

sending the DCI to a user equipment;

wherein configuring the common field comprises configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as an ARI command.

2. The method according to claim 1, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises:

DCI corresponding to physical downlink shared channel (PDSCH) transmission of a downlink primary component carrier; and

/or

at least one piece of DCI transmitted by the downlink primary component carrier (PCC).

3. A method for feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information for carrier aggregation, the method comprising:

receiving downlink control information (DCI) which is sent by a base station and transmitted by a downlink component carrier; and

feeding back ACK/NACK information according to a command indicated by a common field preset in the DCI, wherein the common field is configured as one command according to a type of a downlink component carrier transmitting the DCI, and the common field is indicative of one of a transmission power control (TPC) command and an ACK resource indication (ARI) command, wherein the common field is configured by configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as an ARI command.

4. The method according to claim 3, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises DCI corresponding to physical downlink shared channel (PDSCH) transmission of a downlink primary component carrier.

5. The method according to claim 3, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises at least one piece of DCI transmitted by a downlink primary component carrier.

6. A base station, comprising:

a configuring module, configured to configure a common field preset in a downlink control information (DCI) as one command according to a type of a downlink component carrier transmitting the DCI, wherein the common field is indicative of one of a transmission power control (TPC) command and an ACK resource indication (ARI) command, wherein the common field is configured by configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as an ARI command; and

a sending module, configured to send the DCI to a user equipment.

7. The base station according to claim 6, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises at least one piece of DCI transmitted by a downlink primary component carrier.

8. The base station according to claim 6, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises DCI corresponding to physical downlink shared channel (PDSCH) transmission of a downlink primary component carrier.

9. A user equipment, comprising:

a receiving module, configured to receive downlink control information (DCI) that is sent by a base station and transmitted by a downlink component carrier; and

a feedback module, configured to feed-back Acknowledgement/Negative-acknowledgement (ACK/NACK) feedback information according to a command indicated by a common field preset in the DCI, wherein the common field is configured as one command according to a type of a downlink component carrier transmitting the DCI, and the common field is indicative of one of a transmission power control (TPC) command and an ACK resource indication (ARI) command, wherein the common field is configured by configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as an ARI command.

10. The user equipment according to claim 9, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises DCI corresponding to physical downlink shared channel (PDSCH) transmission of a downlink primary component carrier.

11. The user equipment according to claim 9, wherein the at least one piece of DCI transmitted by a system-linked downlink component carrier comprises at least one piece of DCI transmitted by a downlink primary component carrier.