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.
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4G | 24/06/2021 | ISLD-202106-041 | HUAWEI | No | Family Member |
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Technologies
Product
Use Cases
Services
Claim
A method for feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information for carrier aggregation, characterized by comprising:
receiving, by a user equipment (UE), downlink control information (DCI) that is sent by a base station and transmitted by a downlink component carrier, wherein the DCI includes a comprises a transmission power control (TPC) command field, wherein the command field can be configured as an ACK resource indication (ARI) command; determining, by the UE, that a command indicated by the common field is the ARI command if the DCI is at least one piece of DCI transmitted by a downlink non-primary component carrier; and feeding back, by the UE, ACK/NACK information according to the ARI command.
2. The method according to claim 1, characterized in that the method further comprises:
determining, by the UE, that the command indicated by the common field is a TPC command if the DCI is at least one piece of DCI transmitted by a downlink primary component carrier.
3. The method according to claim 2, characterized in that 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.
4. A method for feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information for carrier aggregation, the method comprising:
receiving, by user equipment (UE), downlink control information (DCI) transmitted by a downlink component carrier from a base station, wherein the DCI comprises a common field that can be configured as one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; determining, by the UE, that a command indicated by the common field is the TPC command if the DCI is at least one piece of DCI transmitted by a first type of downlink component carrier, and determining, by the UE, that the command indicated by the common field is the ARI command if the DCI is at least one piece of DCI transmitted by a second type of downlink component carrier; and feeding back, by the UE, ACK/NACK information according to the determined TPC command or ARI command.
5. The method according to claim 4, wherein the first type of downlink component carrier is a downlink primary component carrier; and the second type of downlink component carrier is a downlink non-primary component carrier.
6. The method according to claim 5, wherein the at least one piece of DCI transmitted by a downlink primary component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
7. The method according to claim 4, wherein the first type of downlink component carrier is a system-linked downlink component carrier; and the second type of downlink component carrier is a non-system-linked downlink component carrier.
8. The method according to claim 7, 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. User equipment, comprising:
a receiver, configured to receive downlink control information (DCI) that is sent by a base station and transmitted by a downlink component carrier, wherein the DCI includes a common field, the common field is a transmission power control (TPC) command field, and the command field can be configured as an ACK resource indication (ARI) command; a processor, configured to determine that a command indicated by the common field is the ARI command if the DCI is at least one piece of DCI transmitted by a downlink non-primary component carrier; and a transmitter, configured to feed back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to the ARI command.
10. The user equipment according to claim 9, wherein the processor is further configured to determine that the command indicated by the common field is a TPC command if the DCI is at least one piece of DCI transmitted by a downlink primary component carrier.
11. The user equipment according to claim 10, wherein the at least one piece of DCI transmitted by a downlink primary component carrier comprises: DCI corresponding to physical downlink shared channel (PDSCH) transmission of a downlink primary component carrier.
12. User equipment, comprising:
a receiver, configured to receive downlink control information (DCI) transmitted by a downlink component carrier from a base station, wherein the DCI includes a common field, and the common field can be configured as one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; a processor, configured to determine that a command indicated by the common field is the TPC command if the DCI is at least one piece of DCI transmitted by a first type of downlink component carrier, and determine that the command indicated by the common field is the ARI command if the DCI is at least one piece of DCI transmitted by a second type of downlink component carrier; and a transmitter, configured to feed back ACK/NACK information according to the determined TPC command or ARI command.
13. The user equipment according to claim 12, wherein the first type of downlink component carrier is a downlink primary component carrier; and the second type of downlink component carrier is a downlink non-primary component carrier.
14. The user equipment according to claim 13, wherein the at least one piece of DCI transmitted by a downlink primary component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
15. The method according to claim 12, wherein the first type of downlink component carrier is a system-linked downlink component carrier; and the second type of downlink component carrier is a non-system-linked downlink component carrier.
16. The method according to claim 15, 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.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
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