Method and system for maximizing coverage based on coherence blocks

Patent metadata

Field	Value
Publication number	US-11843480-B2
Application number	US-202117376770-A
Country	US
Kind code	B2
Filing date	Jul 15, 2021
Priority date	Mar 1, 2021
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

Aspects of the subject disclosure may include, for example, identifying a coherence time for a user equipment (UE), identifying a coherence bandwidth for the UE, determining a coherence block based on the coherence time and the coherence bandwidth, and, based on a first determination that the coherence block satisfies a threshold, permitting the UE to transmit sounding reference signal (SRS) data over a smaller SRS bandwidth that is smaller than a default SRS bandwidth, at a lower periodicity that is lower than a default periodicity, or a combination thereof, thereby conserving power resources of the UE. Other embodiments are disclosed.

First claim

What is claimed is:

1. A device, comprising:
a processing system including a processor; and
a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising:
identifying a coherence time for a user equipment (UE), wherein the processing system is associated with a radio access network (RAN) that includes multiple adaptive antenna arrays that operate as a coherent antenna system;
identifying a coherence bandwidth for the UE;
determining a coherence block based on the coherence time and the coherence bandwidth; and
based on a first determination that the coherence block satisfies a threshold, permitting the UE to transmit sounding reference signal (SRS) data over a smaller SRS bandwidth that is smaller than a default SRS bandwidth and at a lower periodicity that is lower than a default periodicity, thereby conserving power resources of the UE.

2. The device of claim 1 , wherein the UE is located at or within a threshold distance from a cell edge, and wherein the operations further comprise, based on the first determination that the coherence block satisfies the threshold, exploiting the coherence block by determining an average across the coherence block to obtain an uplink (UL) channel estimate for the UE, thereby maintaining UL coverage for the UE.

3. The device of claim 1 , wherein the permitting comprises instructing the UE to transmit the SRS data over the smaller SRS bandwidth and at the lower periodicity.

4. The device of claim 1 , wherein the operations further comprise, based on the first determination that the coherence block satisfies the threshold, determining that the UE is eligible for multi-user (Mu)-multiple-input-multiple-output (MIMO).

5. The device of claim 4 , wherein the operations further comprise employing Mu-MIMO for the UE based on the determining that the UE is eligible for Mu-MIMO.

6. The device of claim 5 , wherein the employing Mu-MIMO for the UE is performed transparently to other UEs for which single-user (Su)-MIMO is employed.

7. The device of claim 1 , wherein the operations further comprise, based on a second determination that the coherence block does not satisfy the threshold, determining that the UE is not eligible for multi-user (Mu)-multiple-input-multiple-output (MIMO).

8. The device of claim 1 , wherein the threshold comprises a number of SRS symbols.

9. The device of claim 1 , wherein the multiple adaptive antenna arrays operate in time division duplex (TDD), frequency division duplex (FDD), or a combination thereof.

10. The device of claim 1 , wherein the identifying the coherence time and the coherence bandwidth comprises obtaining information regarding the coherence time and the coherence bandwidth via an Open RAN (O-RAN) compliant interface.

11. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processing system communicatively coupled with a combination of modular antenna panels and including a processor, facilitate performance of operations, the operations comprising:
tracking a coherence block for a user equipment (UE) based on information obtained from a RAN interface;
identifying, based on the tracking, that the coherence block does not satisfy a threshold; and
based on the identifying that the coherence block does not satisfy the threshold, instructing the UE to transmit sounding reference signals (SRS) over a larger SRS bandwidth that is larger than a default SRS bandwidth and at a higher periodicity that is higher than a default periodicity, and determining that the UE is not eligible for multi-user (Mu)-multiple-input-multiple-output (MIMO).

12. The non-transitory machine-readable medium of claim 11 , wherein each modular antenna panel of the combination of modular antenna panels comprises a respective group of antenna elements, resulting in multiple respective groups of antenna elements, and wherein the antenna elements of the multiple respective groups of antenna elements are coherent with one another.

13. The non-transitory machine-readable medium of claim 11 , wherein the combination of modular antenna panels operates in time division duplex (TDD), frequency division duplex (FDD), or a combination thereof.

14. The non-transitory machine-readable medium of claim 11 , wherein the threshold comprises a number of SRS symbols.

15. The non-transitory machine-readable medium of claim 11 , wherein the coherence block does not satisfy the threshold based on a mobility of the UE exceeding a second threshold.

16. The non-transitory machine-readable medium of claim 11 , wherein the coherence block does not satisfy the threshold based on antenna ports of the UE being non-line of sight (NLOS) relative to the modular antenna panels.

17. A method, comprising:
identifying, by a processing system including a processor, a coherence time and a coherence bandwidth for a user equipment (UE), wherein the UE is located at or within a threshold distance from a cell edge;
determining, by the processing system, a coherence block based on the coherence time and the coherence bandwidth;
based on a determination that the coherence block satisfies a threshold, exploiting, by the processing system, the coherence block by determining an average across the coherence block to obtain an uplink (UL) channel estimate for the UE, thereby maintaining UL coverage for the UE and enabling multi-user (Mu)-multiple-input-multiple-output (MIMO); and
based on the determination that the coherence block satisfies the threshold, permitting the UE to transmit sounding reference signal (SRS) data over a smaller SRS bandwidth by reducing the SRS bandwidth allocated to the UE, thereby conserving power resources of the UE.

18. The method of claim 17 , further comprising, based on the determination that the coherence block satisfies the threshold, permitting the UE to transmit the SRS data at a lower periodicity relative to a default periodicity, thereby further conserving the power resources of the UE.

19. The method of claim 18 , wherein the permitting comprises instructing the UE to transmit the SRS data over the smaller SRS bandwidth and at the lower periodicity.

20. The method of claim 17 , wherein the processing system is communicatively coupled with an aggregation of modular antenna arrays that operate in time division duplex (TDD), frequency division duplex (FDD), or a combination thereof.

Assignees

• At & T Ip I Lp

Inventors

• Tsui Ernest

Classifications

• H04B7/0695

  using beam selection · CPC title

• H04L25/0222 Primary

  Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency · CPC title

• G06N20/00

  Machine learning · CPC title

• H01Q3/267

  Phased-array testing or checking devices · CPC title

• H01Q3/2617

  Array of identical elements · CPC title