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

Patent metadata

Field	Value
Publication number	US-11848890-B2
Application number	US-202016884303-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	Dec 3, 2009
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

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.

First claim

What is claimed is:

1. A method, comprising:
receiving, from a base station, a plurality of pieces of downlink control information (DCI) through a plurality of downlink component carriers, wherein a common field in at least one piece of the DCI transmitted on a system-linked downlink component carrier is configured as a transmission power control (TPC) command field, and a common field in at least one piece of the DCI transmitted on a non-system-linked downlink component carrier is configured as an acknowledgment (ACK) resource indication (ARI) command field, and wherein when an uplink ACK channel resource implicitly mapped from a corresponding PDCCH is reserved on one uplink component carrier for a corresponding downlink component carrier, the corresponding downlink component carrier is a system-linked downlink component carrier of the one uplink component carrier;
obtaining an uplink ACK channel resource for a first physical downlink shared channel (PDSCH) transmission through implicit mapping from a physical downlink control channel (PDCCH) corresponding to the first PDSCH transmission, the PDCCH corresponding to the first PDSCH transmission being transmitted on the system-linked downlink component carrier;
obtaining, through high-level signaling, a group of uplink ACK channel resources for a second PDSCH transmission, wherein a PDCCH corresponding to the second PDSCH transmission is transmitted on the non-system-linked downlink component carrier; and
feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to the plurality of pieces of DCI.

2. The method according to claim 1 , wherein the at least one piece of the DCI transmitted on the system-linked downlink component carrier comprises:
DCI corresponding to a PDSCH transmission on a downlink primary component carrier or at least one piece of DCI transmitted on the downlink primary component carrier.

3. The method according to claim 1 , wherein the common field in the at least one piece of the DCI transmitted by the non-system-linked downlink component carrier being configured as the ARI command field comprises:
the common field in all the DCI transmitted on the non-system-linked downlink component carrier being configured as the ARI command field.

4. The method according to claim 1 , wherein when a user equipment is configured to feed back ACK/NACK information over multiple uplink component carriers at the same time, downlink component carriers that feed back ACK/NACK information over the same uplink component carrier are in a same downlink component carrier group, and different downlink component carrier groups are processed respectively according to a method for feeding back ACK/NACK information for carrier aggregation.

5. An apparatus, comprising:
at least one processor, and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive, from a base station, a plurality of pieces of downlink control information (DCI) through a plurality of downlink component carriers, wherein a common field in at least one piece of the DCI transmitted on a system-linked downlink component carrier is configured as a transmission power control (TPC) command field, and a common field in at least one piece of the DCI transmitted on a non-system-linked downlink component carrier is configured as an acknowledgement (ACK) resource indication (ARI) command field, and wherein when an uplink ACK channel resource implicitly mapped from a corresponding PDCCH is reserved on one uplink component carrier for a corresponding downlink component carrier, the corresponding downlink component carrier is a system-linked downlink component carrier of the one uplink component carrier;
obtain an uplink ACK channel resource for a first physical downlink shared channel (PDSCH) transmission through implicit mapping from a physical downlink control channel (PDCCH) corresponding to the first PDSCH transmission, the PDCCH corresponding to the first PDSCH transmission being transmitted on the system-linked downlink component carrier;
obtain, through high-level signaling, a group of uplink ACK channel resources for a second PDSCH transmission, wherein a PDCCH corresponding to the second PDSCH transmission is transmitted on the non-system-linked downlink component carrier; and
feed back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to the plurality of pieces of DCI.

6. The apparatus according to claim 5 , wherein the at least one piece of the DCI transmitted on the system-linked downlink component carrier comprises:
DCI corresponding to a PDSCH transmission on a downlink primary component carrier or at least one piece of DCI transmitted on the downlink primary component carrier.

7. The apparatus according to claim 5 , wherein the common field in the at least one piece of the DCI transmitted by the non-system-linked downlink component carrier being configured as the ARI command field comprises:
the common field in all DCI transmitted by the non-system-linked downlink component carrier being configured as the ARI command field.

8. The apparatus according to claim 5 , wherein when a user equipment is configured to feed back ACK/NACK information over multiple uplink component carriers at the same time, downlink component carriers that feed back ACK/NACK information over the same uplink component carrier are regarded as a same downlink component carrier group, and different downlink component carrier groups are processed respectively according to a method for feeding back ACK/NACK information for carrier aggregation.

9. A non-transitory computer readable storage medium storing programming for execution by a processor, the programming comprising instructions to:
receive, from a base station, a plurality of pieces of downlink control information (DCI) through a plurality of downlink component carriers, wherein a common field in at least one piece of the DCI transmitted on a system-linked downlink component carrier is configured as a transmission power control (TPC) command field, and a common field in at least one piece of the DCI transmitted on a non-system-linked downlink component carrier is configured as an acknowledgment (ACK) resource indication (ARI) command field, and wherein when an uplink ACK channel resource implicitly mapped from a corresponding PDCCH is reserved on one uplink component carrier for a corresponding downlink component carrier, the corresponding downlink component carrier is a system-linked downlink component carrier of the one uplink component carrier;
obtain an uplink ACK channel resource for first physical downlink shared channel (PDSCH) transmission through implicit mapping from a physical downlink control channel (PDCCH) corresponding to the first PDSCH transmission, wherein the PDCCH corresponding to the first PUSCH transmission is transmitted on the system-linked downlink component carrier;
obtain, through high-level signaling, a group of uplink ACK channel resources for a second PDSCH transmission, wherein a PDCCH corresponding to the second PDSCH transmission is transmitted on the non-system-linked downlink component carrier; and
feed back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to the plurality of pieces of DCI.

10. The non-transitory computer readable storage medium according to claim 9 , wherein the at least one piece of the DCI transmitted by the system-linked downlink component carrier comprises:
DCI corresponding to a PDSCH transmission of a downlink primary component carrier or at least one piece of DCI transmitted by the downlink primary component carrier.

11. The

Assignees

• Huawei Tech Co Ltd

Inventors

• Chen Xiaobo
• Li Chaojun

Classifications

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L1/1685 Primary

  the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal · CPC title

• H04L1/1896

  ARQ related signaling · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04W52/54

  Signalisation aspects of the TPC commands, e.g. frame structure · CPC title