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.
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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Claim
1. A method, comprising:
receiving, from a base station, downlink control information (DCI) through a downlink component carrier; and feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to a first command, wherein the first command is related to ACK/NACK feedback and configured in a common field in the DCI, wherein the first command is configurable to have a type of at least two types of commands related to ACK/NACK feedback, and the common field is configurable to carry the first command when the first command has any type of the at least two types of commands.
2. The method according to claim 1, wherein the common field is a transmission power control (TPC) command field, the at least two types of commands related to ACK/NACK feedback comprise three types of commands, and the three types of commands are: a TPC command type, a downlink assignment index (DAI) command type, and an acknowledgment (ACK) resource indication (ARI) command type.
3. The method according to claim 2, wherein the DCI comprises one or more pieces of DCI, a feedback mode of the ACK/NACK information is a multiplexing feedback mode, and feeding back the ACK/NACK information comprises:
determining that the first command configured in the common field is the TPC command type in response to at least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and determining that the first command configured in the common field is the ARI command type in response to the at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
4. The method according to claim 2, wherein the DCI comprises one or more pieces of DCI, a feedback mode of the ACK/NACK information is a bundling feedback mode, and feeding back the ACK/NACK information comprises:
determining that the first command configured in the common field is the TPC command type in response to at least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and determining that the first command configured in the common field is the DAI command type in response to at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
5. The method according to claim 4, further comprising:
determining an assigned first ACK/NACK channel; and wherein feeding back the ACK/NACK information comprises:
feeding back, through the assigned first ACK/NACK channel, ACK/NACK information in response to the at least one piece of DCI that carries the first command being correctly received and the first command being the DAI command type; and
wherein the assigned first ACK/NACK channel is dedicated to being used to feed back the ACK/NACK information in response to the at least one piece of DCI that carries the first command being correctly received.
6. The method according to claim 5, wherein determining the first ACK/NACK channel comprises:
determining the assigned first ACK/NACK channel according to an implicit rule; or determining the assigned first ACK/NACK channel according to high-level signaling.
7. The method according to claim 4, further comprising:
determining an assigned second ACK/NACK channel; and wherein feeding back the ACK/NACK information comprises:
feeding back, through the assigned second ACK/NACK channel, the ACK/NACK information in response to the at least one piece of DCI that carries the first command not being correctly received and the first command being the DAI command type;
wherein the assigned second ACK/NACK channel is dedicated to use to feed back the ACK/NACK information in response to the at least one piece of DCI that carries the first command not being correctly received.
8. The method according to claim 7, wherein determining the assigned second ACK/NACK channel comprises:
determining the assigned second ACK/NACK channel according to an implicit rule; or determining the assigned second ACK/NACK channel according to high-level signaling.
9. An apparatus, comprising:
a transceiver, configured to receive, from a base station, downlink control information (DCI) through a downlink component carrier; and a processor, configured to:
determine Acknowledgement/Negative-acknowledgement (ACK/NACK) information; and
feed back, through the transceiver, the ACK/NACK information according to a first command, wherein the first command is related to ACK/NACK feedback and configured in a common field in the DCI, wherein the first command is configurable to have a type of at least two types of commands related to ACK/NACK feedback, and the common field is configurable to carry the first command when the first command has any type of the at least two types of commands.
10. The apparatus according to claim 9, wherein the common field is a transmission power control (TPC) command field, the at least two types of commands related to ACK/NACK feedback comprise three types of commands, and the three types of commands are: a TPC command type, a downlink assignment index (DAI) command type, and an acknowledgment (ACK) resource indication (ARI) command type.
11. The apparatus according to claim 10, wherein the DCI comprises one or more pieces of DCI, a feedback mode of the ACK/NACK information is a multiplexing feedback mode, and the processor is configured to:
determine that the first command configured in the common field is the TPC command type in response to at least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and determine that the first command configured in the common field is the ARI command type in response to the at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
12. The apparatus according to claim 10, wherein the DCI comprises one or more pieces of DCI, a feedback mode of the ACK/NACK information is a bundling feedback mode, and the processor is configured to:
determine that the first command configured in the common field is the TPC command type in response to at least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and determine that the first command configured in the common field is the DAI command type in response to the at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
13. The apparatus according to claim 12, wherein the processor is further configured to:
determine an assigned first ACK/NACK channel; wherein the processor is configured to:
feed back, through the assigned first ACK/NACK channel, the ACK/NACK information in response to the at least one piece DCI that carries the first command being correctly received and the first command being the DAI command type; and
wherein the assigned first ACK/NACK channel is dedicated to use to feed back the ACK/NACK information in response to the at least one piece of DCI that carries the first command being correctly received.
14. The apparatus according to claim 13, wherein the processor is configured to:
determine the assigned first ACK/NACK channel according to an implicit rule; or determine the assigned first ACK/NACK channel according to high-level signaling.
15. The apparatus according to claim 12, wherein the processor is further configured to:
determine an assigned second ACK/NACK channel; wherein the processor is configured to:
feed back, through the assigned second ACK/NACK channel, the ACK/NACK information in response to the at least one piece of DCI that carries the first command not being correctly received and the first command being the DAI command type; and
wherein the second ACK/NACK channel is dedicated to use to feed back the ACK/NACK information in response to the at least one piece of DCI that carries the first command not being correctly received.
16. The apparatus according to claim 15, wherein the processor is configured to:
determine the assigned second ACK/NACK channel according to an implicit rule; or determine the assigned second ACK/NACK channel according to high-level signaling.
17. A non-transitory computer readable storage medium storing programming for execution by a processor, the programming comprising instructions to:
receive, from a base station, downlink control information (DCI) through a downlink component carrier; and feed back Acknowledgement/Negative-acknowledgement (ACK/NACK) information according to a first command, wherein the first command is related to ACK/NACK feedback and configured in a common field in the DCI, wherein the first command is configurable to have a type of at least two types of commands related to ACK/NACK feedback, and the common field is configurable to carry the first command when the first command has any type of the at least two types of commands.
18. The non-transitory computer readable storage medium according to claim 17, wherein the common field is a transmission power control (TPC) command field, the at least two types of commands related to ACK/NACK feedback comprise three types of commands, and the three types of commands are: a TPC command type, a downlink assignment index (DAI) command type, and an Acknowledgement (Ack) resource indication (ARI) command type.
19. The non-transitory computer readable storage medium according to claim 18, wherein the DCI comprises one or more pieces of DCI, and the programming further comprises instructions to:
when a feedback mode of the ACK/NACK information is a multiplexing feedback mode:
determine that the first command configured in the common field is the TPC command type in response to at least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and
determine that the first command indicated by the common field in the DCI is the ARI command type in response to the at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
20. The non-transitory computer readable storage medium according to claim 18, wherein the DCI comprises one or more pieces of DCI, and the programming further comprises instructions to:
when a feedback mode of the ACK/NACK information is a bundling feedback mode,
determine that the first command configured in the common field is the TPC command type in response to a least one piece of DCI that carries the first command being transmitted through a system-linked downlink component carrier; and
determine that the first command configured in the common field is the DAI command type in response to the at least one piece of DCI that carries the first command being transmitted through a non-system-linked downlink component carrier.
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