PHASE-NOISE COMPENSATION REFERENCE SIGNAL CONFIGURATION REPORTING AND SIGNALING

• US 20180077603A1
• Filed: 02/17/2017
• Published: 03/15/2018
• Est. Priority Date: 09/13/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: John Wilson, Makesh Pravin, Luo, Tao, Jiang, Jing, Subramanian, Sundar, Akkarakaran, Sony, Maharshi, Atul, Mukkavilli, Krishna Kiran
• Granted Patent: US 10,595,225 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/0014 Carrier regulation of chaotic carriers H04L27/001; for multicarrier receivers H04L27/2657
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may report a phase-noise compensation reference signal (PCRS) configuration to a base station to enable per-UE PCRS signaling. For example, a UE may operate in a wireless communications system using carrier frequencies greater than 6 GHz, which may be affected by phase noise. The UE may accordingly determine a PCRS configuration based on a capability to receive signals. The PCRS configuration may include a resource mapping for one or more PCRS, a number of PCRS ports used for PCRS, a multiplexing scheme for one or more PCRS ports, or the UE'"'"'s phase noise estimation capability. The UE may then transmit a reporting message including the PCRS configuration to a base station. The base station may use the PCRS configuration for PCRS transmissions to the UE.

Claims

1. A method for wireless communication at a user equipment (UE), comprising:

identifying a capability of the UE to receive signals in a communications system using carrier frequencies greater than 6 GHz;

determining a phase-noise compensation reference signal (PCRS) configuration based as least in part on the identified capability; and

transmitting, to a base station, a reporting message comprising the determined PCRS configuration.

2. The method of claim 1, further comprising:

determining a resource mapping pattern for one or more PCRS, wherein the PCRS configuration comprises the determined resource mapping pattern.

3. The method of claim 1, further comprising:

determining a number of PCRS ports used for PCRS, wherein the PCRS configuration comprises the determined number of PCRS ports.

4. The method of claim 1, further comprising:

determining a multiplexing scheme used for one or more PCRS ports, wherein the PCRS configuration comprises the determined multiplexing scheme.

5. The method of claim 4, wherein the multiplexing scheme comprises a PCRS precoder corresponding to the one or more PCRS ports.

6. The method of claim 5, wherein the one or more PCRS ports are mapped to respective demodulation reference signal (DMRS) ports.

7. The method of claim 4, wherein the multiplexing scheme comprises one or both of the one or more PCRS ports multiplexed onto a single resource or a single PCRS port multiplexed over a set of resources.

8. The method of claim 1, further comprising:

determining a phase noise estimation capability, wherein the PCRS configuration comprises the determined phase noise estimation capability.

9. The method of claim 8, further comprising:

identifying a first channel estimate corresponding to a first set of DMRS ports;

identifying a second channel estimate corresponding to a second set of DMRS ports;

generating a superposed channel based at least in part on the first channel estimate and the second channel estimate; and

estimating a phase noise based at least in part on the generated superposed channel and a PCRS multiplexed onto a single resource, wherein the PCRS is precoded with a same precoder used for a downlink reference signal comprising a DMRS or a UE-specific reference signal (UERS).

10. The method of claim 1, further comprising:

receiving, from the base station, a message comprising an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS; and

transmitting, to the base station, one or more PCRS based at least in part on the received uplink PCRS configuration.

11. The method of claim 1, further comprising:

determining a UE PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS;

transmitting, to the base station, a second reporting message comprising the determined uplink PCRS configuration; and

transmitting, to the base station, one or more PCRS based at least in part on the determined uplink PCRS configuration.

12. The method of claim 1, further comprising:

receiving a PCRS from the base station in response to the transmitted reporting message.

13. A method for wireless communication at a base station, comprising:

receiving, from a user equipment (UE), a reporting message comprising a phase-noise compensation reference signal (PCRS) configuration; and

transmitting one or more PCRS based at least in part on the PCRS configuration.

14. The method of claim 13, further comprising:

determining an uplink PCRS configuration;

transmitting, to the UE, a message comprising the determined uplink PCRS configuration; and

receiving, from the UE, one or more PCRS based at least in part on the uplink PCRS configuration.

15. The method of claim 13, further comprising:

receiving, from the UE, a second reporting message comprising an uplink PCRS configuration; and

receiving, from the UE, one or more PCRS based at least in part on the uplink PCRS configuration.

16. The method of claim 13, wherein the PCRS configuration comprises one or both of a resource mapping pattern used for transmitting the one or more PCRS or a number of PCRS ports used for transmitting the one or more PCRS.

17. The method of claim 13, wherein the PCRS configuration comprises a multiplexing scheme for one or more PCRS port.

18. The method of claim 17, wherein the multiplexing scheme comprises a PCRS precoder corresponding to each of the one or more PCRS ports.

19. The method of claim 18, wherein the PCRS precoder is a same precoder used for a downlink reference signal comprising a DMRS or a UE-specific reference signal (VERS).

20. The method of claim 18, wherein the one or more PCRS ports are mapped to respective DMRS ports.

21. The method of claim 17, wherein the multiplexing scheme comprises the one or more PCRS ports multiplexed onto a set of one or more resources.

22. An apparatus for wireless communication at a user equipment (UE) in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

identify a capability of the UE to receive signals in a communications system using carrier frequencies greater than 6 GHz;

determine a phase-noise compensation reference signal (PCRS) configuration based as least in part on the identified capability; and

transmit, to a base station, a reporting message comprising the determined PCRS configuration.

23. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a resource mapping pattern for one or more PCRS, wherein the PCRS configuration comprises the determined resource mapping pattern.

24. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a number of PCRS ports used for PCRS, wherein the PCRS configuration comprises the determined number of PCRS ports.

25. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a multiplexing scheme used for one or more PCRS ports, wherein the PCRS configuration comprises the determined multiplexing scheme.

26. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a phase noise estimation capability, wherein the PCRS configuration comprises the determined phase noise estimation capability.

27. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

receive, from the base station, a message comprising an uplink PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS; and

transmit, to the base station, one or more PCRS based at least in part on the received uplink PCRS configuration.

28. The apparatus of claim 22, wherein the instructions are further executable by the processor to cause the apparatus to:

determine a UE PCRS configuration, wherein the uplink PCRS configuration comprises a resource mapping pattern for transmitting PCRS;

transmit, to the base station, a second reporting message comprising the determined uplink PCRS configuration; and

transmit, to the base station, one or more PCRS based at least in part on the determined uplink PCRS configuration.

29. An apparatus for wireless communication at a base station, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

receive, from a user equipment (UE), a reporting message comprising a phase-noise compensation reference signal (PCRS) configuration; and

transmit one or more PCRS based at least in part on the PCRS configuration.

30. The apparatus of claim 29, wherein the instructions are further executable by the processor to cause the apparatus to:

determine an uplink PCRS configuration;

transmit, to the UE, a message comprising the determined uplink PCRS configuration; and

receive, from the UE, one or more PCRS based at least in part on the uplink PCRS configuration.