Phase tracking reference signal transmission for physical uplink shared channel reliability enhancement

1. One or more non-transitory computer-readable media having instructions that, when executed by one or more processors, cause an apparatus to:

process scheduling information to determine a schedule of a physical uplink shared channel (PUSCH) transmission with a plurality of repetitions, wherein the plurality of repetitions include at least two repetition sets to be respectively transmitted with at least two transmit beams;

determine a number of phase tracking reference signal (PTRS) ports to be used for transmitting PTRSs associated with each of the at least two repetition sets;

cause the PUSCH transmission to be transmitted with the plurality of repetitions using the at least two transmit beams; and

cause the PTRSs to be transmitted by the number of PTRS ports.

2. The one or more non-transitory computer-readable media of claim 1 , wherein to determine the number of PTRS ports, the instructions, when executed, further cause the apparatus to:

determine a plurality of PTRS ports are configured; and

determine one PTRS port is to be used for transmitting PTRSs associated with each of the at least two repetition sets.

3. The one or more non-transitory computer-readable media of claim 1 , wherein a first number of PTRS ports is initially determined for a first repetition set of the at least two repetition sets, a second number of PTRS ports is initially determined for a second repetition set of the at least two repetition sets, and to determine the number of PTRS ports the instructions are further to cause the apparatus to:

determine the first number of PTRS ports is to be used for transmitting PTRSs associated with the plurality of repetitions.

4. The one or more non-transitory computer-readable media of claim 3 , wherein an initial number of PTRS ports is determined for each of the at least two repetition sets and the instructions, when executed, further cause the apparatus to:

determine the first number of PTRS ports is to be used for transmitting PTRSs associated with the plurality of repetitions based on the first number being a smallest value of the initial numbers of PTRS ports; or

determine the first number of PTRS ports is to be used for transmitting PTRSs associated with the plurality of repetitions based on the first number being a largest value of the initial numbers of PTRS ports.

5. The one or more non-transitory computer-readable media of claim 1 , wherein the instructions, when executed, further cause the apparatus to:

determine, for a first repetition set of the at least two repetition sets, an indicated maximum number of PTRS ports from radio resource control (RRC) signaling;

determine, for the first repetition set, a codebook subset;

determine one or more antenna ports for transmission of the first repetition set; and

determine a first number of PTRS ports for transmitting PTRSs associated with the first repetition set based on the indicated maximum number, the codebook subset, and the one or more antenna ports.

6. The one or more non-transitory computer-readable media of claim 5 , wherein the instructions, when executed, further cause the apparatus to: determine the first number of PTRS ports is one port if the indicated maximum number is one, the codebook subset is not configured to be non-coherent or partial coherent, or the one or more antenna ports do not include port 1000 or 1002 and port 1001 or 1003.

7. The one or more non-transitory computer-readable media of claim 5 , wherein the instructions, when executed, further cause the apparatus to: determine the first number of PTRS ports is two ports if the indicated maximum number is two, the codebook subset is configured to be non-coherent or partial coherent, and the one or more antenna ports include port 1000 or 1002 and port 1001 or 1003.

8. The one or more non-transitory computer-readable media of claim 1 , wherein the instructions, when executed, further cause the apparatus to:

determine, based on radio resource control (RRC) signaling, an indicated maximum number of PTRS ports across all of the plurality of repetitions.

9. An apparatus comprising:

memory to store a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association table; and

processing circuitry coupled with the memory, the processing circuitry to:

process one or more downlink control information (DCI) to: schedule a physical uplink shared channel (PUSCH) transmission with a first repetition set that include one or more repetitions that share a first scheduling request indicator (SRI) or transmitted precoding matrix indicator (TPMI) and a second repetition set that include one or more repetitions that share a second SRI/TPMI; and to indicate, in a single field or a plurality of fields, one or more association values;

determine, based on the one more association values and the PTRS-DMRS association table, a PTRS-to-DMRS association for the first repetition set or the second repetition set;

cause a PTRS to be transmitted based on the PTRS-to-DMRS association; and

cause the first repetition set and the second repetition set to be transmitted.

10. The apparatus of claim 9 , wherein the one or more DCI includes a single two-bit field to indicate the one or more association values and, to determine the PTRS-to-DMRS association, the processing circuitry is to determine:

a PTRS port is associated with a first or second scheduled DMRS port, wherein a DMRS port for the first repetition set is the first or second scheduled DMRS port and a DMRS port for the second repetition set is the first or second scheduled DMRS port.

11. The apparatus of claim 9 , wherein the one or more DCI includes a first field to indicate a first association value of the one or more association values and a second field to indicate a second association value of the one or more association values and, to determine the PTRS-to-DMRS association, the processing circuitry is to:

determine, based on the first association value, a PTRS port that is associated with a DMRS port for the first repetition set; and

determine, based on the second association value, a PTRS port that is associated with a DMRS port for the second repetition set.

12. The apparatus of claim 11 , wherein the PTRS port that is associated with the DMRS port for the first repetition set and the PTRS port that is associated with the DMRS port for the second repetition set are different PTRS ports.

13. The apparatus of claim 9 , wherein the processing circuitry is further to:

determine, based on the PTRS-to-DMRS association, a first PTRS port is associated with a first DMRS port for the first repetition set; and

transmit the PTRS via the first PTRS port and a DMRS via the first DMRS port using a common precoder.

14. The apparatus of claim 9 , wherein the one or more association values includes a first association value and a second association value, the one or more DCI includes a first stage DCI to schedule the PUSCH transmission and a second stage DCI to include the second association value, and the processing circuitry is further to:

determine, based on the first association value and the PTRS-DMRS association table, a PTRS-to-DMRS association for the first repetition set; and

determine, based on the second association value and the PTRS-DMRS association table, a PTRS-to-DMRS association for the second repetition set.

15. The apparatus of claim 14 , wherein the second stage DCI comprises a bit width of log 2(ceil(N/M)*M, where M is a number of PTRS ports, and N is a number of transmission layers.

16. The apparatus of claim 14 , wherein the first association value is in the first stage DCI or the second stage DCI.

17. A method of comprising:

transmitting, to a user equipment, radio resource control (RRC) signaling for a configured grant-physical uplink shared channel (CG-PUSCH) transmission with a plurality of repetition sets, wherein the RRC signaling includes one or more parameters to configure the plurality of repetition sets with a corresponding plurality of phase tracking reference signal PTRS-to-demodulation reference signal (DMRS associations;

receiving the CG-PUSCH transmission;

receiving PTRSs associated with the CG-PUSCH transmission; and

processing the CG-PUSCH transmission based on receiving of the PTRSs associated with the CG-PUSCH transmission.

18. The method of claim 17 , wherein the one or more parameters include a single RRC parameter.