NULL RESOURCE ELEMENTS FOR DYNAMIC AND BURSTY INTER-CELL INTERFERENCE MEASUREMENT IN NEW RADIO

• US 20180359069A1
• Filed: 05/31/2018
• Published: 12/13/2018
• Est. Priority Date: 06/13/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: NAM, Wooseok, LUO, Tao, JOHN WILSON, Makesh Pravin, AKKARAKARAN, Sony, CHAKRABORTY, Kaushik, CHEN, Shengbo
• Granted Patent: US 10,727,996 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 17/373 Predicting channel quality or other radio frequency [RF] parameters
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Aspects of the present disclosure provide various apparatuses and methods for utilizing null resource elements to facilitate dynamic and bursty inter-cell interference measurements in a wireless network like 5G new radio (NR). A user equipment (UE) is provided with resources and signaling to facilitate bursty interference measurements at demodulation time.

Claims

1. A method of wireless communication operable at a scheduled entity, the method comprising:

receiving a downlink communication comprising a plurality of null resource elements embedded within a set of resource elements allocated for a reference signal; and

demodulating the downlink communication;

performing a plurality of null-based interference measurements on the downlink communication during demodulation of the downlink communication,

wherein the plurality of null-based interference measurements are based on the plurality of null resource elements embedded within the resource elements allocated for the reference signal.

2. The method of claim 1,

wherein the reference signal comprises a phase tracking reference signal (PTRS), and

wherein the performing comprises performing the plurality of null-based interference measurements based on the plurality of null resource elements embedded within the resource elements of the PTRS configured for a common phase error (CPE) estimate.

3. The method of claim 1,

wherein the reference signal comprises a phase tracking reference signal (PTRS),

wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and

wherein the performing comprises performing the plurality of null-based interference measurements based on the plurality of null resource elements instead of utilizing the PTRS for a common phase error (CPE) estimate.

4. The method of claim 1,

wherein the reference signal comprises a phase tracking reference signal (PTRS),

wherein the downlink communication comprises a New Radio (NR) sub-6 communication or a millimeter wave (mmWave) communication, and

wherein the performing comprises performing the plurality of null-based interference measurements and a common phase error (CPE) estimate based on the PTRS.

5. The method of claim 1,

wherein the reference signal comprises a punctured phase tracking reference signal (PTRS), and

wherein the performing comprises performing the plurality of null-based interference measurements based on the punctured PTRS received in the downlink communication, the punctured PTRS comprising the null resource elements embedded within a portion of resource elements allocated for the punctured PTRS.

6. The method of claim 1,

wherein the reference signal comprises a zero power phase tracking reference signal (PTRS), and

wherein the performing comprises performing the plurality of null-based interference measurements based on the zero power PTRS received in the downlink communication, the zero power PTRS comprising null resource elements embedded in all resource elements allocated for the zero power PTRS.

7. A wireless communication device comprising:

a processor;

a memory communicatively coupled to the processor; and

a transceiver communicatively coupled to the processor,

wherein the processor and the memory are configured to;

receive a downlink communication comprising a plurality of null resource elements embedded within a set of resource elements allocated for a reference signal;

demodulate the downlink communication;

perform a plurality of null-based interference measurements on the downlink communication during demodulation of the downlink communication,

wherein the plurality of null-based interference measurements are based on the plurality of null resource elements embedded within the resource elements allocated for the reference signal.

8. The wireless communication device of claim 7,

wherein the reference signal comprises a phase tracking reference signal (PTRS), and

wherein the processor and the memory are further configured to:

perform the plurality of null-based interference measurements based on the plurality of null resource elements embedded within the resource elements of the PTRS configured for a common phase error (CPE) estimate.

9. The wireless communication device of claim 7,

wherein the reference signal comprises a phase tracking reference signal (PTRS),

wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and

wherein the processor and the memory are further configured to:

perform the plurality of null-based interference measurements based on the plurality of null resource elements instead of utilizing the PTRS for a common phase error (CPE) estimate.

10. The wireless communication device of claim 7,

wherein the reference signal comprises a phase tracking reference signal (PTRS),

wherein the downlink communication comprises a New Radio (NR) sub-6 communication or a millimeter wave (mmWave) communication, and

wherein the processor and the memory are further configured to:

perform the plurality of null-based interference measurements and a common phase error (CPE) estimate based on the PTRS.

11. The wireless communication device of claim 7,

wherein the reference signal comprises a punctured phase tracking reference signal (PTRS), and

wherein the processor and the memory are further configured to:

perform the plurality of null-based interference measurements based on the punctured PTRS received in the downlink communication, the punctured PTRS comprising the null resource elements embedded within a portion of resource elements allocated for the punctured PTRS.

12. The wireless communication device of claim 7,

wherein the reference signal comprises a zero power phase tracking reference signal (PTRS), and

wherein the processor and the memory are further configured to:

perform comprises performing the plurality of null-based interference measurements based on the zero power PTRS received in the downlink communication, the zero power PTRS comprising null resource elements embedded in all resource elements allocated for the zero power PTRS.

13. A method of wireless communication operable at a scheduling entity, the method comprising:

configuring a downlink communication, the configuring comprising embedding null resource elements within a set of resource elements allocated for a reference signal in the downlink communication, wherein the null resource elements facilitate a plurality of null-based interference measurements during demodulation of the downlink communication; and

transmitting the downlink communication to a scheduled entity.

14. The method of claim 13, wherein the reference signal comprises a phase tracking reference signal (PTRS).

15. The method of claim 14, wherein the configuring comprises embedding the null resource elements within the PTRS configured for a common phase error (CPE) estimate.

16. The method of claim 15, wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and wherein the configuring comprises configuring the PTRS to facilitate the plurality of null-based interference measurements based on the null resource elements instead of the CPE estimate.

17. The method of claim 15, wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and wherein the configuring comprises configuring the PTRS to facilitate the plurality of null-based interference measurements and the CPE estimate.

18. The method of claim 15, wherein the downlink communication comprises a millimeter wave (mmWave) communication, and wherein the configuring comprises configuring the PTRS to facilitate the plurality of null-based interference measurements and the CPE estimate.

19. The method of claim 14, wherein the configuring comprises at least one of:

configuring a punctured PTRS, and wherein the punctured PTRS comprises the null resource elements embedded within a portion of resource elements allocated for the PTRS;

or

configuring a zero power PTRS, and wherein the zero power PTRS comprises the null resource elements embedded in all resource elements allocated for the PTRS.

20. A wireless communication device comprising:

a processor;

a memory communicatively coupled to the processor; and

a transceiver communicatively coupled to the processor,

wherein the processor and the memory are configured to;

configure a downlink communication, the configuring comprising embedding null resource elements within a set of resource elements allocated for a reference signal in the downlink communication, wherein the null resource elements facilitate a plurality of null-based interference measurements during demodulation of the downlink communication; and

transmit the downlink communication to a scheduled entity.

21. The wireless communication device of claim 20, wherein the reference signal comprises a phase tracking reference signal (PTRS).

22. The wireless communication device of claim 21, wherein the processor and the memory are further configured to:

embed the null resource elements within the PTRS configured for a common phase error (CPE) estimate.

23. The wireless communication device of claim 22,

wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and

wherein the processor and the memory are further configured to:

configure the PTRS to facilitate the plurality of null-based interference measurements based on the null resource elements instead of the CPE estimate.

24. The wireless communication device of claim 22,

wherein the downlink communication comprises a New Radio (NR) sub-6 communication, and

wherein the processor and the memory are further configured to:

configure the PTRS to facilitate the plurality of null-based interference measurements and the CPE estimate.

25. The wireless communication device of claim 22,

wherein the downlink communication comprises a millimeter wave (mmWave) communication, and

wherein the processor and the memory are further configured to:

configure the PTRS to facilitate the plurality of null-based interference measurements and the CPE estimate.

26. The wireless communication device of claim 21, wherein the processor and the memory are further configured to, at least one of:

configure a punctured PTRS, and wherein the punctured PTRS comprises the null resource elements embedded within a portion of resource elements allocated for the PTRS;

or

configure a zero power PTRS, and wherein the zero power PTRS comprises the null resource elements embedded in all resource elements allocated for the PTRS.