Puncturing PT-RS based on a collision between PT-RS and coreset
A transmitter, such as a base station, identifies a potential collision between a first set of resources configured for a CORESET for a receiver and a second set of resources configured for a PT-RS for the receiver. The apparatus may determine whether colliding resources in the CORESET are configured/used for a control transmission or a data transmission. The apparatus punctures the PT-RS based on whether the colliding resources in the CORESET are configured/used for the control transmission (e.g., PDCCH). For example, the apparatus may puncture the PT-RS only for resource blocks of the CORESET colliding with the control transmission without puncturing the PT-RS over an entire set of the colliding resources configured for the CORESET. A receiver may similarly identify potential collisions and determine whether PT-RS will be punctured based on whether the colliding resources in the CORESET are configured/used for a control transmission or a data transmission.
1. A method of wireless communication at a transmitter, comprising:
identifying a potential collision between a first set of resources configured for a Control Resource Set (CORESET) for a receiver and a second set of resources configured for a Phase Tracking Reference Signal (PT-RS) for the receiver; and
puncturing the PT-RS based on when colliding resources in the first set of resources for the CORESET are configured for a control transmission; or
transmitting the PT-RS without puncturing when the colliding resources configured for the CORESET are not used for the control transmission.
2. The method of claim 1 , further comprising:
determining whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or a data transmission, wherein the PT-RS is punctured based on a determination of whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or the data transmission.
3. The method of claim 2 , wherein the control transmission comprises a physical downlink control channel (PDCCH) transmission.
4. The method of claim 2 , wherein the data transmission comprises a physical downlink shared channel (PDSCH) transmission.
5. The method of claim 1 , wherein the transmitter punctures the PT-RS only for resource blocks of the CORESET colliding with the control transmission without puncturing the PT-RS over an entire set of the colliding resources configured for the CORESET.
6. The method of claim 1 , further comprising:
identifying a CORESET configuration; and
identifying a PT-RS configuration, wherein the potential collision is identified based on the CORESET configuration and the PT-RS configuration.
7. The method of claim 6 , wherein the CORESET configuration indicates a location of the first set of resources configured for the CORESET and whether individual resources within the first set of resources are scheduled for the control transmission or the data transmission.
8. The method of claim 1 , wherein the transmitter comprises a base station.
9. An apparatus for wireless communication at a transmitter, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
identify a potential collision between a first set of resources configured for a Control Resource Set (CORESET) for a receiver and a second set of resources configured for a Phase Tracking Reference Signal (PT-RS) for the receiver; and
puncture the PT-RS when colliding resources in the first set of resources configured for the CORESET are configured for a control transmission; or
transmit the PT-RS without puncturing when the colliding resources configured for the CORESET are not used for the control transmission.
10. The apparatus of claim 9 , wherein the at least one processor is further configured to:
determine whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or a data transmission, wherein the PT-RS is punctured based on a determination of whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or the data transmission.
11. The apparatus of claim 9 , wherein the transmitter punctures the PT-RS only for resource blocks of the CORESET colliding with the control transmission without puncturing the PT-RS over an entire set of the colliding resources configured for the CORESET.
12. The apparatus of claim 9 , wherein the at least one processor is further configured to:
identify a CORESET configuration; and
identify a PT-RS configuration, wherein the potential collision is identified based on the CORESET configuration and the PT-RS configuration.
13. A method of wireless communication at a receiver, comprising:
identifying a potential collision between a first set of resources configured for a Control Resource Set (CORESET) for the receiver and a second set of resources configured for a Phase Tracking Reference Signal (PT-RS) for the receiver;
determining whether the PT-RS will be punctured based on whether colliding resources in the first set of resources configured for the CORESET are used for a control transmission; and
receiving the PT-RS based on the first set of resources configured for the PT-RS and a determination regarding whether the PT-RS will be punctured.
14. The method of claim 13 , further comprising:
determining whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or a data transmission.
15. The method of claim 14 , wherein the receiver determines that the PT-RS will be punctured when the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission, and wherein the receiver determines that the PT-RS will not be punctured when the colliding resources configured for the CORESET are configured for the data transmission.
16. The method of claim 14 , wherein the control transmission comprises a physical downlink control channel (PDCCH) transmission.
17. The method of claim 14 , wherein the data transmission comprises a physical downlink shared channel (PDSCH) transmission.
18. The method of claim 13 , wherein the receiver determines that the PT-RS will be punctured only for resource blocks of the CORESET colliding with the control transmission without the PT-RS being punctured over an entire set of the colliding resources configured for the CORESET.
19. The method of claim 13 , further comprising:
identifying a CORESET configuration; and
identifying a PT-RS configuration, wherein the potential collision is identified based on the CORESET configuration and the PT-RS configuration.
20. The method of claim 19 , wherein the CORESET configuration indicates a location of the first set of resources configured for the CORESET and whether individual resources within the first set of resources are scheduled for the control transmission or the data transmission.
21. The method of claim 13 , wherein the receiver comprises a user equipment.
22. The method of claim 13 , further comprising:
estimating a phase error based on the PT-RS and the determination regarding whether the PT-RS will be punctured.
23. An apparatus for wireless communication at a receiver, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
identify a potential collision between a first set of resources configured for a Control Resource Set (CORESET) for the receiver and a second set of resources configured for a Phase Tracking Reference Signal (PT-RS) for the receiver;
determine whether the PT-RS will be punctured based whether colliding resources in the first set of resources configured for the CORESET are used for a control transmission; and
receive the PT-RS based on the first set of resources configured for the PT-RS and a determination regarding whether the PT-RS will be punctured.
24. The apparatus of claim 23 , wherein the at least one processor is further configured to:
determine whether the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission or a data transmission.
25. The apparatus of claim 24 , wherein the receiver determines that the PT-RS will be punctured when the colliding resources in the first set of resources configured for the CORESET are configured for the control transmission, and wherein the receiver determines that the PT-RS will not be punctured when the colliding resources configured for the CORESET are configured for the data transmission.
26. The apparatus of claim 24 , wherein the receiver determines that the PT-RS will be punctured only for resource blocks of the CORESET colliding with the control transmission without the PT-RS being punctured over an entire set of the colliding resources configured for the CORESET.
27. The apparatus of claim 24 , wherein the at least one processor is further configured to:
identify a CORESET configuration; and
identify a PT-RS configuration, wherein the potential collision is identified based on the CORESET configuration and the PT-RS configuration.
28. The apparatus of claim 24 , wherein the at least one processor is further configured to:
estimate a phase error based on the PT-RS and the determination whether the PT-RS will be punctured.