Apparatus and method for determining resources for phase tracking reference signal (PT-RS) pilot signals using frequency domain patterns
An apparatus for wireless communication selects a recommendation for the need. The apparatus selects the resource to transmit a phase tracking reference signal based on a condition of a communication system. The apparatus performs at least one of transmitting an indication of the selected recommendation for the resource to a second wireless communication device or transmitting at least one of information or a reference signal to the second device to assist the second device in determining the resource. In an aspect, the selection may be made based on receiving a request for a recommendation from the second wireless communication device or the transmitting the at least one of the information or the reference signal are based on a request received.
1. An apparatus for wireless communication, comprising:
a transceiver of a base station;
an antenna coupled to the transceiver;
a memory; and
at least one processor coupled to the memory and configured to control the transceiver, the at least one processor further configured to:
receive, from a user equipment (UE), via the transceiver, at least one recommendation for a frequency domain pattern for phase tracking reference signal (PT-RS) pilot signals;
transmit, to the UE, via the transceiver, a configuration for the frequency domain pattern for the PT-RS pilot signals, the configuration for the frequency domain pattern for the PT-RS pilot signals being either based on the at least one recommendation or not based on the at least one recommendation; and
transmit, to the UE, via the transceiver, the PT-RS pilot signals in one or more time-frequency resource locations based on the frequency domain pattern for the PT-RS pilot signals.
2. The apparatus of claim 1 , wherein the at least one processor further configured to:
determine a density of the PT-RS pilot signals based on the frequency domain pattern; and
determine the one or more time-frequency resource locations for the PT-RS pilot signals based on at least the density of the PT-RS pilot signals.
3. The apparatus of claim 2 , wherein the density of the PT-RS pilot signals is associated with a number of PT-RS tones, locations of PT-RS tones, or both.
4. The apparatus of claim 1 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises modulation and coding scheme (MCS) information.
5. The apparatus of claim 1 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises capability information of the UE.
6. The apparatus of claim 1 , wherein the at least one processor further configured to:
determine the frequency domain pattern for the PT-RS pilot signals either based on the at least one recommendation or not based on the at least one recommendation.
7. The apparatus of claim 6 , wherein a frequency density of the transmitted PT-RS pilot signals is based on the frequency domain pattern.
8. The apparatus of claim 7 , wherein the frequency domain pattern is more sparse when a larger bandwidth is scheduled for the UE than when a smaller bandwidth is scheduled for the UE.
9. The apparatus of claim 1 , wherein the one or more time-frequency resource locations in which the PT-RS pilot signals are transmitted are further based on at least one of a bandwidth scheduled for the UE, a modulation and coding scheme (MCS), a port mapping, or any combination thereof.
10. A method for wireless communication by a base station, comprising:
receiving, from a user equipment (UE), at least one recommendation for a frequency domain pattern for phase tracking reference signal (PT-RS) pilot signals;
transmitting, to the UE, a configuration for the frequency domain pattern for the PT-RS pilot signals, the configuration for the frequency domain pattern for the PT-RS pilot signals being either based on the at least one recommendation or not based on the at least one recommendation; and
transmitting, to the UE, the PT-RS pilot signals in one or more time-frequency resource locations based on the frequency domain pattern for the PT-RS pilot signals.
11. The method of claim 10 , further comprising:
determining a density of the PT-RS pilot signals based on the frequency domain pattern; and
determining the one or more time-frequency resource locations for the PT-RS pilot signals based on at least the density of the PT-RS pilot signals.
12. The method of claim 11 , wherein the density of the PT-RS pilot signals is associated with a number of PT-RS tones, locations of PT-RS tones, or both.
13. The method of claim 10 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises modulation and coding scheme (MCS) information.
14. The method of claim 10 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises capability information of the UE.
15. The method of claim 10 , further comprising:
determining the frequency domain pattern for the PT-RS pilot signals either based on the at least one recommendation or not based on the at least one recommendation.
16. The method of claim 15 , wherein a frequency density of the transmitted PT-RS pilot signals is based on the frequency domain pattern.
17. The method of claim 16 , wherein the frequency domain pattern is more sparse when a larger bandwidth is scheduled for the UE than when a smaller bandwidth is scheduled for the UE.
18. The method of claim 10 , wherein the one or more time-frequency resource locations in which the PT-RS pilot signals are transmitted are further based on at least one of a bandwidth scheduled for the UE, a modulation and coding scheme (MCS), a port mapping, or any combination thereof.
19. An apparatus for wireless communication by a first wireless communication device, comprising:
means for receiving, from a user equipment (UE), a recommendation for a frequency domain pattern for phase tracking reference signal (PT-RS) pilot signals;
means for transmitting, to the UE, a configuration for the frequency domain pattern for the PT-RS pilot signals, the configuration for the frequency domain pattern for the PT-RS pilot signals being either based on the at least one recommendation or not based on the at least one recommendation; and
means for transmitting, to the UE, the PT-RS pilot signals in one or more time-frequency resource locations based on the frequency domain pattern for the PT-RS pilot signals.
20. The apparatus of claim 19 , further comprising:
means for determining a density of the PT-RS pilot signals based on the frequency domain pattern; and
means for determining the one or more time-frequency resource locations for the PT-RS pilot signals based on at least the density of the PT-RS pilot signals.
21. The apparatus of claim 20 , wherein the density of the PT-RS pilot signals is associated with a number of PT-RS tones, locations of PT-RS tones, or both.
22. The apparatus of claim 19 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises modulation and coding scheme (MCS) information.
23. The apparatus of claim 19 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises capability information of the UE.
24. The apparatus of claim 19 , further comprising:
means for determining the frequency domain pattern for the PT-RS pilot signals either based on the at least one recommendation or not based on the at least one recommendation.
25. The apparatus of claim 24 , wherein a frequency density of the transmitted PT-RS pilot signals is based on the frequency domain pattern.
26. The apparatus of claim 25 , wherein the frequency domain pattern is more sparse when a larger bandwidth is scheduled for the UE than when a smaller bandwidth is scheduled for the UE.
27. The apparatus of claim 19 , wherein the one or more time-frequency resource locations in which the PT-RS pilot signals are transmitted are further based on at least one of a bandwidth scheduled for the UE, a modulation and coding scheme (MCS), a port mapping, or any combination thereof.
28. A non-transitory, computer-readable medium storing one or more instructions for wireless communication that, when executed by one or more processors of a first wireless communication device, instruct the one or more processors to:
receive, from a user equipment (UE), at least one recommendation for a frequency domain pattern for phase tracking reference signal (PT-RS) pilot signals;
transmit, to the UE, a configuration for the frequency domain pattern for the PT-RS pilot signals, the configuration for the frequency domain pattern for the PT-RS pilot signals being either based on the at least one recommendation or not based on the at least one recommendation; and
transmit, to the UE, the PT-RS pilot signals in one or more time-frequency resource locations based on the frequency domain pattern for the PT-RS pilot signals.
29. The computer-readable medium of claim 28 , further comprising instructions that, when executed by the one or more processors, instruct the one or more processors to:
determine a density of the PT-RS pilot signals based on the frequency domain pattern; and
determine the one or more time-frequency resource locations for the PT-RS pilot signals based on at least the density of the PT-RS pilot signals.
30. The computer-readable medium of claim 29 , wherein the density of the PT-RS pilot signals is associated with a number of PT-RS tones, locations of PT-RS tones, or both.
31. The computer-readable medium of claim 28 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises modulation and coding scheme (MCS) information.
32. The computer-readable medium of claim 28 , wherein the at least one recommendation for the frequency domain pattern for the PT-RS pilot signals comprises capability information of the UE.
33. The computer-readable medium of claim 28 , further comprising instructions for wireless communication that, when executed by one or more processors of a first wireless communication device, instruct the one or more processors to:
determine the frequency domain pattern for the PT-RS pilot signals either based on the at least one recommendation or not based on the at least one recommendation.
34. The computer-readable medium of claim 33 , wherein a frequency density of the transmitted PT-RS pilot signals is based on the frequency domain pattern.
35. The computer-readable medium of claim 34 , wherein the frequency domain pattern is more sparse when a larger bandwidth is scheduled for the UE than when a smaller bandwidth is scheduled for the UE.
36. The computer-readable medium of claim 28 , wherein the one or more time-frequency resource locations in which the PT-RS pilot signals are transmitted are further based on at least one of a bandwidth scheduled for the UE, a modulation and coding scheme (MCS), a port mapping, or any combination thereof.