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.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 24/06/2021 | ISLD-202106-041 | HUAWEI | No | Family Member |
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Technologies
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Use Cases
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Claim
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 configuration of the common field is indicative of whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; and sending the DCI to a user equipment.
2. The method according to claim 1, wherein configuring the common field comprises: configuring the common field in at least one piece of DCI transmitted by a primary downlink component carrier as the TPC command and configuring the common field in at least one piece of DCI transmitted by a non-primary downlink component carrier as the ARI command.
3. The method according to claim 2, wherein the at least one piece of DCI transmitted by a primary downlink 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 downlink control information (DCI) transmitted by a downlink component carrier from a base station; and feeding back ACK/NACK information according to a command indicated in 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 configuration in the common field indicates whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command.
5. The method according to claim 4, wherein: if the received DCI includes at least one piece of DCI transmitted by a primary downlink component carrier, the command field indicates the TPC command in the at least one piece of DCI; and
if the received DCI includes at least one piece of DCI transmitted by a non-primary downlink component carrier, the command field indicates the ARI command in the at least one piece of DCI.
6. The method according to claim 5, wherein the at least one piece of DCI transmitted by a primary downlink component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
7. A base station, comprising:
a processor configured to set up 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 setting up of the common field indicates whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; and a transmitter configured to send the DCI to a user equipment.
8. The base station according to claim 7, wherein the processor is configured to set up the common field, by setting the common field in at least one piece of DCI transmitted by a primary downlink component carrier as the TPC command and by setting up the common field in at least one other piece of DCI transmitted by a non-primary downlink component carrier as the ARI command.
9. The base station according to claim 8, wherein the at least one piece of DCI transmitted by a primary downlink component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
10. A user equipment, comprising:
a receiver configured to receive downlink control information (DCI) transmitted by a downlink component carrier from a base station; and a transmitter, configured to send 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 configuration in the common field indicates whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command.
11. The user equipment according to claim 10, wherein the receiver by being configured to receive at least one piece of DCI transmitted by a primary downlink component carrier, wherein the common field in the at least one piece of DCI transmitted by the primary downlink component carrier indicates the TPC command; and by being configured to receive at least one other piece of DCI transmitted by a non-primary downlink component carrier, wherein the common field in the at least one other piece of DCI transmitted by the non-primary downlink component carrier indicates t the ARI command.
12. The user equipment according to claim 11, wherein the at least one piece of DCI transmitted by the primary downlink component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
13. A non-transitory computer readable storage medium storing programming for execution by a processor, the programming comprising instructions to:
configure 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 configuration of the common field indicates whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; and send the DCI to a user equipment.
14. The non-transitory computer readable storage medium according to claim 13, wherein the instructions to configure includes instructions to: configure the common field in at least one piece of DCI transmitted by a primary downlink component carrier as the TPC command and to configure a common field in at least one other piece of DCI transmitted by a non-primary downlink component carrier as the ARI command.
15. The computer readable storage medium according to claim 14, wherein the at least one piece of DCI transmitted by a primary downlink component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
16. A non-transitory computer readable storage medium storing programming for execution by a processor, the programming comprising instructions to:
receive downlink control information (DCI) from a base station, wherein the DCI is transmitted by a downlink component carrier; and feed 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 configuration in the common field indicates whether the command is one of a transmission power control (TPC) command and an ACK resource indication (ARI) command.
17. The non-transitory computer readable storage medium according to claim 16, wherein if the received DCI includes at least one piece of DCI transmitted by a primary downlink component carrier, the instructions to feed back ACK/NACK information according to the command, includes instructions to: feed back ACK/NACK information according to the TPC command indicated in the command field in the at least one piece of DCI; and
if the received DCI includes at least one piece of DCI transmitted by a non-primary downlink component carrier, the instructions to feed back ACK/NACK information according to the command, includes instructions to: feed back ACK/NACK information according to the ARI command indicated in the command field in the at least one piece of DCI.
18. The non-transitory computer readable storage medium according to claim 17, wherein the at least one piece of DCI transmitted by a primary downlink component carrier comprises:
DCI corresponding to physical downlink shared channel (PDSCH) transmission of the downlink primary component carrier.
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