ACK-NACK PUCCH dropping schemes for TDD cell
Methods are disclosed for enhanced Physical Uplink Control Channel (PUCCH) transmission for 3 rd Generation Partnership Project (3GPP) new radio (NR) technologies.
1. A method comprising:
receiving a first Physical Downlink Shared Channel (PDSCH) comprising a Semi-Persistently Scheduled (SPS) PDSCH indicating a first PDSCH resource and a first PUCCH resource for transmitting a first acknowledgement message for the first PDSCH resource in a first PUCCH time slot;
detecting a collision between the first acknowledgement message in the first time slot and at least one symbol due to a Time-Division Duplex (TDD) Uplink/Downline (UL/DL) configuration; and
transmitting the first acknowledgement in a second PUCCH time slot that is different than the first PUCCH time slot.
2. The method of claim 1 , further comprising:
receiving a second PDSCH, having a start that is subsequent to a start of the first PDSCH, indicating a second PDSCH resource and a second PUCCH resource for transmitting a second acknowledgement message for the second PDSCH resource in a third PUCCH time slot that is subsequent to the first time slot.
3. The method of claim 2 , wherein the first acknowledgement message comprises a first priority and a second acknowledgement message comprising a second priority.
4. The method of claim 3 , wherein the second time slot is subsequent to the third time slot, and
wherein the first priority equals the second priority.
5. The method of claim 3 , wherein the third time slot is subsequent to the second time slot, and
wherein the first priority equals the second priority.
6. The method of claim 3 , wherein the second PUCCH resource ends prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.
7. The method of claim 3 , wherein the third time slot is subsequent to the second time slot,
wherein the second PUCCH resource does not end prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.
8. The method of claim 1 , further comprising:
transmitting a second PDSCH, having a start that is subsequent to a start of the first PDSCH, indicating a second PDSCH resource and a second PUCCH resource for transmitting a second acknowledgement message for the second PDSCH resource in a third PUCCH time slot that is subsequent to the first time slot,
wherein the first acknowledgement message comprises a first priority and the second acknowledgement message comprising a second priority.
9. The method of claim 8 , wherein the second time slot is subsequent to the third time slot, and
wherein the first priority equals the second priority.
10. The method of claim 8 , wherein the third time slot is subsequent to the second time slot, and
wherein the first priority equals the second priority.
11. The method of claim 8 , wherein the second PUCCH resource ends prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.
12. The method of claim 8 , wherein the third time slot is subsequent to the second time slot,
wherein the second PUCCH resource does not end prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.
13. A method comprising:
transmitting a first Physical Downlink Shared Channel (PDSCH) comprising a Semi-Persistently Scheduled (SPS) PDSCH indicating a first PDSCH resource and a first PUCCH resource for transmitting a first acknowledgement message for the first PDSCH resource in a first PUCCH time slot; and
receiving, in response to the transmission, a first acknowledgement in a second PUCCH time slot that is different than the first PUCCH time slot, wherein the transmission in the second PUCCH is based on a detected collision between the first acknowledgement message in the first time slot and at least one symbol due to a Time-Division Duplex (TDD) Uplink/Downline (UL/DL) configuration.
14. A user equipment device comprising:
at least one processing unit;
a memory storage comprising memory-based instructions, the instructions executable by the at least one processing unit to cause:
receiving a first Physical Downlink Shared Channel (PDSCH) comprising a Semi-Persistently Scheduled (SPS) PDSCH indicating a first PDSCH resource and a first PUCCH resource for transmitting a first acknowledgement message for the first PDSCH resource in a first PUCCH time slot;
detecting a collision between the first acknowledgement message in the first time slot and at least one symbol due to a Time-Division Duplex (TDD) Uplink/Downline (UL/DL) configuration; and
transmitting the first acknowledgement in a second PUCCH time slot that is different than the first PUCCH time slot.
15. The user equipment device of claim 14 , wherein the instructions, when executed by the at least one processing unit cause:
receiving a second PDSCH, having a start that is subsequent to a start of the first PDSCH, indicating a second PDSCH resource and a second PUCCH resource for transmitting a second acknowledgement message for the second PDSCH resource in a third PUCCH time slot that is subsequent to the first time slot.
16. The user equipment device of claim 15 , wherein the first acknowledgement message comprises a first priority and the second acknowledgement message comprising a second priority.
17. The user equipment device of claim 16 , wherein the second time slot is subsequent to the third time slot, and
wherein the first priority equals the second priority.
18. The user equipment device of claim 16 , wherein the third time slot is subsequent to the second time slot, and
wherein the first priority equals the second priority.
19. The user equipment device of claim 16 , wherein the second PUCCH resource ends prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.
20. The user equipment device of claim 16 , wherein the third time slot is subsequent to the second time slot,
wherein the second PUCCH resource does not end prior to a start of the first PUCCH resource, and
wherein the first priority is different from the second priority.