Method, Base Station, and User Equipment for Feeding Back ACK/NACK Information for Carrier Aggregation

• US 20120236812A1
• Filed: 06/02/2012
• Published: 09/20/2012
• 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
• Granted Patent: US 8,885,587 B2
• Time in Patent Office: Days
• 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

1-16. -16. (canceled)

17. 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 at least one type of command field related to ACK/NACK feedback, wherein the common field can be configured as the at least two types of command fields related to ACK/NACK feedback; and

sending the DCI to a user equipment, so that the user equipment feeds back the ACK/NACK information according to the DCI.

18. The method according to claim 17, wherein configuring the common field comprises configuring common field preset in the DCI as at least one type of command field related to ACK/NACK feedback according to an acknowledgement information feedback mode and/or a downlink component carrier type.

19. The method according to claim 17, wherein the at least two types of command fields related to ACK/NACK feedback are:

a downlink assignment index (DAI) command field and an ACK resource indication (ARI) command field;

a transmission power control (TPC) command field and an ARI command field;

a TPC command field and a DAI command field;

or

a TPC command field, a DAI command field, and an ARI command field.

20. The method according to claim 17, wherein configuring the common field comprises configuring the common field in at least one piece of DCI transmitted by a downlink primary component carrier as a TPC command field.

21. The method according to claim 20, wherein the at least one piece of DCI transmitted by the downlink primary component carrier comprises DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.

22. The method according to claim 20, wherein configuring the common field comprises configuring the common field in at least one piece of DCI transmitted by a downlink non-primary component carrier as an ACK resource indication (ARI) command field and/or a DAI command field.

23. The method according to claim 17, wherein the common field can be configured as a transmission power control (TPC) command field and an ACK resource indication (ARI) command field, and wherein configuring the common field further comprises configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command field 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 field.

24. The method according to claim 23, 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 PCC.

25. The method according to claim 17, wherein the common field can be configured as a transmission power control (TPC) command field and an ACK resource indication (ARI) command field, and wherein configuring the common field further comprises configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as a TPC command field and configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as an ARI command field.

26. The method according to claim 17, wherein the common field can be configured as a TPC command field and a DAI command field and 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 field and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as a DAI command field.

27. The method according to claim 17, wherein the common field can be configured as a TPC command field and a DAI command field and configuring the common field comprises configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as a TPC command field and configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a DAI command field.

28. 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 field which is related to ACK/NACK feedback and configured in a common field preset in the DCI, wherein the common field can be configured as at least two types of command fields related to ACK/NACK feedback.

29. The method according to claim 28, wherein the at least two types of command fields related to ACK/NACK feedback are:

a downlink assignment index (DAI) command field and an ACK resource indication (ARI) command field;

a transmission power control (TPC) command field and an ARI command field;

a TPC command field and a DAI command field;

or

a TPC command field, a DAI command field, and an ARI command field.

30. The method according to claim 29, wherein the common field can be configured as a transmission power control (TPC) command field and an ARI command field;

if the received DCI is at least one piece of DCI transmitted by a system-linked downlink component carrier, the command field in the DCI is the TPC command field; and

if the received DCI is at least one piece of DCI transmitted by a non-system-linked downlink component carrier, the command field in the DCI is the ARI command field.

31. The method according to claim 29, wherein the common field can be configured as a transmission power control (TPC) command field and an ARI command field;

if the received DCI is at least one piece of DCI transmitted by a non-system-linked downlink component carrier, the command field in the DCI is the TPC command field; and

if the received DCI is at least one piece of DCI transmitted by a system-linked downlink component carrier, the command field in the DCI is the ARI command field.

32. A base station, comprising:

a configuring module, configured to configure a common field preset in a downlink control information (DCI) as at least one type of command field related to Acknowledgement/Negative-acknowledgement (ACK/NACK) feedback, wherein the common field can be configured as the at least two types of command fields related to ACK/NACK feedback; and

a sending module, configured to send the DCI to a user equipment, so that the user equipment feeds back ACK/NACK information according to the DCI.

33. The base station according to claim 32, wherein the common field can be configured as a transmission power control (TPC) command field and an ACK resource indication (ARI) command field;

wherein the configuring module comprises a third unit and a fourth unit;

wherein the third unit is configured to configure the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as the TPC command field; and

wherein the fourth unit is configured to configure the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as the ARI command field.

34. 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 field that is related to ACK/NACK feedback and configured in a common field preset in the DCI, wherein the common field can be configured 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.

35. The user equipment according to claim 34, wherein the receiving module is configured to receive at least one piece of DCI transmitted by a system-linked downlink component carrier, wherein the common field in the at least one piece of DCI transmitted by a system-linked downlink component carrier is configured as a TPC command field;

and is configured to receive at least one piece of DCI transmitted by a non-system-linked downlink component carrier, wherein the common field in the at least one piece of DCI transmitted by a non-system-linked downlink component carrier is configured as an ARI command field.

36. The user equipment according to claim 35, wherein the receiving module is configured to receive at least one piece of DCI transmitted by a non-system-linked downlink component, wherein the common filed in the at least one piece of DCI transmitted by a non-system-linked downlink component is configured as a TPC command field;

and is configured to receive at least one piece of DCI transmitted by a system-linked downlink component carrier, wherein the common field in the at least one piece of DCI transmitted by a system-linked downlink component carrier is configured as an ARI command field.