Granted Patent B2

US 12,294,534 · App. 17/482,100 · Granted May 6, 2025

Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail (San Diego, CA); Zhifei Fan (San Diego, CA); Xiaoxia Zhang (San Diego, CA); Tao Luo (San Diego, CA); Jing Sun (San Diego, CA); Wooseok Nam (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04L5/0037H04L5/0053H04W72/0453

Abstract

Claims (116)

1. An apparatus for wireless communications at a user equipment (UE), comprising:

a first interface configured to:

obtain configuration information indicating frequency resources available for phase tracking reference signal (PTRS) transmissions as a quantity of PTRS tones per resource block (RB) within a set of frequency resources configured for the PTRS transmissions; and

obtain control information indicating that a first PTRS associated with a first communication is using a subset of frequency resources from the set of frequency resources configured for the PTRS transmissions, the first communication spanning the set of frequency resources configured for the PTRS transmissions; and

a processing system configured to:

select a phase noise compensation for the first communication.

2. The apparatus of claim 1 , wherein:

the configuration information provides:

a plurality of frequency sub-bands as the set of frequency resources,

a plurality of PTRS patterns within at least one of the plurality of frequency sub-bands, or

any combinations thereof, and

wherein the control information indicates a first frequency sub-band as the subset of frequency resources, and a first PTRS pattern, for the first PTRS.

3. The apparatus of claim 1 , wherein:

the first interface or a second interface is configured to:

obtain a PTRS index value in the control information; and

the processing system is further configured to:

select, in accordance with the PTRS index value, the subset of frequency resources and a pattern of resource elements (REs) within the subset of frequency resources that contains the first PTRS.

4. The apparatus of claim 1 , wherein:

the processing system is further configured to:

identify a resource partition indication in the control information that indicates a first resource partition within a set of resource blocks (RBs) allocated for communications between the UE and a network device;

identify an offset indication in the control information that indicates a first offset within the first resource partition; and

select the subset of frequency resources in accordance with the first resource partition and the first offset.

5. The apparatus of claim 4 , wherein:

the processing system is further configured to:

identify a PTRS pattern indication in the control information that indicates a resource element (RE) pattern for the first PTRS within the subset of frequency resources.

6. The apparatus of claim 1 , wherein:

the processing system is further configured to:

measure one or more reference signals, the one or more reference signals spanning the set of frequency resources; and

identify, in accordance with the measuring, a first subset of frequency resources having a channel condition that meets or exceeds channel conditions of one or more other subsets of frequency resources; and

the first interface or a second interface is configured to:

output an indication of the first subset of frequency resources, the control information indicating that the first subset of frequency resources contains the first PTRS.

7. The apparatus of claim 6 , wherein:

the first PTRS includes a first quantity of tones within the first subset of frequency resources in accordance with a frequency density parameter associated with the set of frequency resources.

8. The apparatus of claim 7 , wherein:

the first quantity of tones within the first subset of frequency resources are power boosted to provide an aggregate power level that matches a total power associated with a total quantity of PTRS tones that span the set of frequency resources.

9. The apparatus of claim 6 , wherein:

the first interface or the second interface is configured to:

output a total quantity of tones requested for the first PTRS for the first communication.

10. The apparatus of claim 6 , wherein:

the processing system is further configured to:

select a transport block (TB) size of the first communication in accordance with an indicated TB size or an overhead parameter for TB size calculation, and in accordance with a first quantity of PTRS tones in the first subset of frequency resources.

11. The apparatus of claim 1 , wherein:

the first interface or a second interface is configured to:

obtain control signaling to activate or deactivate PTRS frequency resource indications, the control signaling provided in one or more of radio resource control (RRC) signaling or a medium access control (MAC) control element, and the control signaling including a threshold value of resource blocks (RBs) for activating the PTRS frequency resource indications provided by the control information.

12. An apparatus for wireless communications at a network device, comprising:

a processing system; and

a first interface configured to:

output configuration information for a user equipment (UE), the configuration information indicating frequency resources available for phase tracking reference signal (PTRS) transmissions as a quantity of PTRS tones per resource block (RB) within a set of frequency resources configured for the PTRS transmissions;

output, for the UE, control information indicating that a subset of frequency resources from the set of frequency resources configured for the PTRS transmissions includes a first PTRS for a first communication between the network device and the UE, the first communication spanning the set of frequency resources configured for the PTRS transmissions; and

output, for the UE, the first communication and the first PTRS, the first PTRS being transmitted via the subset of frequency resources.

13. The apparatus of claim 12 , wherein:

the configuration information provides:

a plurality of frequency sub-bands as the set of frequency resources,

a plurality of PTRS patterns within at least one of the plurality of frequency sub-bands, or

any combinations thereof, and

wherein the control information indicates a first frequency sub-band as the subset of frequency resources, and a first PTRS pattern, for the first PTRS.

14. The apparatus of claim 12 , wherein:

the processing system is configured to:

select a PTRS index value of the first PTRS in accordance with the subset of frequency resources and a pattern of resource elements (REs) within the subset of frequency resources that contains the first PTRS; and

the first interface or a second interface is configured to:

output, to the UE, the PTRS index value in the control information.

15. The apparatus of claim 12 , wherein:

the first interface or a second interface is configured to:

output, in the control information, a location of the subset of frequency resources as a resource partition indication that indicates a first resource partition within a set of resource blocks (RBs) allocated for communications between the UE and the network device, and an offset indication that indicates a first offset within the first resource partition.

16. The apparatus of claim 15 , wherein:

the first interface or the second interface is configured to:

output, in the control information, a PTRS pattern indication for a resource element (RE) pattern for the first PTRS within the subset of frequency resources.

17. The apparatus of claim 12 , wherein:

the processing system is configured to:

determine, in accordance with one or more of a measurement report from the UE, one or more measurements of a UE reference signal, one or more resource allocations to one or more other UEs, or any combinations thereof, that a first subset of frequency resources from the set of frequency resources has a channel condition that meets or exceeds channel conditions of one or more other subsets of frequency resources; and

wherein the control information indicates that the first subset of frequency resources contains the first PTRS.

18. The apparatus of claim 17 , wherein:

the first PTRS includes a first quantity of tones within the first subset of frequency resources in accordance with a frequency density parameter associated with the set of frequency resources.

19. The apparatus of claim 18 , wherein:

the first quantity of tones within the first subset of frequency resources are power boosted to provide an aggregate power level that matches a total power associated with a total quantity of PTRS tones that span the set of frequency resources.

20. The apparatus of claim 17 , wherein:

the first interface or a second interface is configured to:

obtain an indication of a total quantity of tones requested for the first PTRS for the first communication.

21. The apparatus of claim 17 , wherein:

the processing system is further configured to:

select a transport block (TB) size of the first communication in accordance with an indicated TB size in the control information and a first quantity of PTRS tones in the first subset of frequency resources.

22. The apparatus of claim 12 , wherein:

the first interface or a second interface is configured to:

output, to the UE, control signaling to activate or deactivate PTRS frequency resource indications, the control signaling provided in one or more of radio resource control (RRC) signaling or a medium access control (MAC) control element, and the control signaling including a threshold value of resource blocks (RBs) for activating the PTRS frequency resource indications provided by the control information.

23. The apparatus of claim 12 , wherein:

the first PTRS is transmitted via a plurality of tones of the subset of frequency resources, and wherein at least two tones of the plurality of tones have a different transmit power according to an estimated channel condition associated with each tone of the at least two tones.

24. A method for wireless communications at an apparatus of a user equipment (UE), comprising:

receiving configuration information indicating frequency resources available for phase tracking reference signal (PTRS) transmissions as a quantity of PTRS tones per resource block (RB) within a set of frequency resources configured for the PTRS transmissions;

receiving control information indicating that a first PTRS associated with a first communication is transmitted using a subset of frequency resources from the set of frequency resources configured for the PTRS transmissions, the first communication spanning the set of frequency resources configured for the PTRS transmissions; and

selecting a phase noise compensation for the first communication.

25. The method of claim 24 , further comprising:

measuring one or more reference signals, the one or more reference signals spanning the set of frequency resources;

identifying, in accordance with the measuring, a first subset of frequency resources having a channel condition that meets or exceeds channel conditions of one or more other subsets of frequency resources; and

transmitting an indication of the first subset of frequency resources, the control information indicating that the first subset of frequency resources contains the first PTRS.

26. The method of claim 24 , wherein:

the configuration information provides:

a plurality of frequency sub-bands as the set of frequency resources,

a plurality of PTRS patterns within at least one of the plurality of frequency sub-bands, or

any combinations thereof, and

wherein the control information indicates a first frequency sub-band as the subset of frequency resources, and a first PTRS pattern, for the first PTRS.

27. The method of claim 24 , further comprising:

receiving a PTRS index value in the control information; and

selecting, in accordance with the PTRS index value, the subset of frequency resources and a pattern of resource elements (REs) within the subset of frequency resources that contains the first PTRS.

28. A method for wireless communications at an apparatus of a network device, comprising:

transmitting configuration information for a user equipment (UE), the configuration information indicating frequency resources available for phase tracking reference signal (PTRS) transmissions as a quantity of PTRS tones per resource block (RB) within a set of frequency resources configured for the PTRS transmissions;

transmitting, for the UE, control information indicating that a subset of frequency resources from the set of frequency resources configured for the PTRS transmissions includes a first PTRS for a first communication between the network device and the UE, the first communication spanning the set of frequency resources configured for the PTRS transmissions; and

transmitting, for the UE, the first communication and the first PTRS, the first PTRS being transmitted via the subset of frequency resources.

29. The method of claim 28 , wherein:

the configuration information provides:

a plurality of frequency sub-bands as the set of frequency resources,

a plurality of PTRS patterns within at least one of the plurality of frequency sub-bands, or

any combinations thereof, and

wherein the control information indicates a first frequency sub-band as the subset of frequency resources, and a first PTRS pattern, for the first PTRS.

30. The method of claim 28 , further comprising:

selecting a PTRS index value of the first PTRS in accordance with the subset of frequency resources and a pattern of resource elements (REs) within the subset of frequency resources that contains the first PTRS; and

transmitting, for the UE, the PTRS index value in the control information.

Assignments (1)

Continuity (2)

References Cited (12)