公开(公告)号：US20230198813A1

公开(公告)日：2023-06-22

申请号：US18166354

申请日：2023-02-08

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Weihua Ye

IPC: H04L25/02 ,  H04L5/14 ,  H04B7/06 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W24/02 ,  H04W72/044 ,  H04W84/04 ,  H04L5/00 ,  H04B7/08 ,  H01Q3/26 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/14 ,  H04W52/26 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/566

CPC classification number: H04L25/0222 ,  H04L25/0226 ,  H04L5/1469 ,  H04B7/0639 ,  H04B7/0634 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  H04B7/0617 ,  H04L5/14 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W24/02 ,  H04W72/0473 ,  H04W84/04 ,  H04B7/043 ,  H04B7/0695 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0202 ,  H04B7/0645 ,  H04B7/088 ,  H01Q3/2617 ,  H04L5/1461 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/143 ,  H04W52/267 ,  H04B7/0632 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12 ,  H01Q3/267 ,  H01Q3/2694 ,  H04B7/0469 ,  H04B7/0473 ,  H04L5/0051 ,  H04L5/0073 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/569 ,  H04J11/0023

Abstract: Aspects of the subject disclosure may include, for example, determining a coherence block for each user equipment (UE) of a plurality of UEs being served by the first cell, resulting in a plurality of coherence blocks, responsive to the determining, identifying a smallest coherence block from the plurality of coherence blocks, identifying a pilot sequence length based on the smallest coherence block, determining a plurality of orthogonal pilot sequences based on the identifying the pilot sequence length, designating, from the plurality of orthogonal pilot sequences, a first group of orthogonal pilot sequences for use in the first cell, and distributing, to each neighboring cell of a plurality of neighboring cells adjacent to the first cell, a respective group of orthogonal pilot sequences from a remainder of the plurality of orthogonal pilot sequences, to prevent pilot contamination between the first cell and the plurality of neighboring cells. Other embodiments are disclosed.

公开(公告)号：US11582070B2

公开(公告)日：2023-02-14

申请号：US17376762

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui

IPC: H04W24/02 ,  H04L25/02 ,  H04L5/14 ,  H04B7/06 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W72/044 ,  H04W72/12 ,  H04W84/04 ,  H04L5/00 ,  H04W72/04 ,  H04B7/08 ,  H01Q3/26 ,  H04W72/08 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/14 ,  H04W52/26 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12 ,  H04J11/00

Abstract: Aspects of the subject disclosure may include, for example, obtaining channel cross correlation data relating to multiple user equipment (UEs) being served in a cell, wherein the channel cross correlation data comprises a correlation coefficient associated with a first UE of the multiple UEs and a second UE of the multiple UEs, identifying that the first UE is experiencing decreasing throughput, responsive to the identifying that the first UE is experiencing decreasing throughput, determining whether the correlation coefficient associated with the first UE and the second UE satisfies a correlation threshold, and, based on a first determination that the correlation coefficient does not satisfy the correlation threshold, adjusting a downlink (DL) transmit power allocation for transmissions directed to the first UE. Other embodiments are disclosed.

公开(公告)号：US11496201B2

公开(公告)日：2022-11-08

申请号：US17376726

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell

IPC: H04J11/00 ,  H04B7/06 ,  H04B7/0452 ,  H04L5/00 ,  H04B7/0426 ,  H04W72/04 ,  H04L25/02

Abstract: Aspects of the subject disclosure may include, for example, receiving sounding reference signal (SRS) symbols from antenna elements of each of multiple modular antenna arrays, wherein the multiple modular antenna arrays are operatively combined to form a coherent antenna system, performing an uplink (UL) channel estimation and a downlink (DL) channel estimation, across a plurality of physical resource blocks (PRBs), based on the SRS symbols, calculating, for the antenna elements, a plurality of uplink (UL) combining weights based on the UL channel estimation and a plurality of downlink (DL) precoder weights based on the DL channel estimation, and causing the plurality of UL combining weights and the plurality of DL precoder weights to be applied to the antenna elements, thereby adjusting beamforming of the coherent antenna system. Other embodiments are disclosed.

公开(公告)号：US20220278717A1

公开(公告)日：2022-09-01

申请号：US17376760

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Dhruv Gupta

IPC: H04B7/0456 ,  H04B7/0426 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04W24/02 ,  G06N20/00

Abstract: Aspects of the subject disclosure may include, for example, receiving and over a first interface of a radio access network (RAN), first data corresponding to a plurality of user equipment (UEs), wherein the first data is associated with first network parameters, and wherein the first network parameters include scheduled UEs, UE spatial separability, or a combination thereof, transmitting the first data to an artificial intelligence (AI) model, responsive to the transmitting the first data to the AI model, obtaining second data from the AI model, wherein the second data is associated with second network parameters, and wherein the second network parameters include downlink (DL) transmit power allocation, and causing the second data to be provided over a second interface to a control unit to enable use of the second data for the plurality of UEs. Other embodiments are disclosed.

公开(公告)号：US11246042B2

公开(公告)日：2022-02-08

申请号：US16744914

申请日：2020-01-16

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Ernest Tsui ,  Guanying Ru ,  Rennie Archibald ,  Weihua Ye

IPC: H04W24/02 ,  H04B17/373 ,  H04W16/28 ,  H04W24/08

Abstract: The described technology is generally directed towards jointly optimizing coverage, capacity, and layer balance in a wireless communications network while maintaining cell edge use device performance constraints. Aspects comprise monitoring edge user devices for performance information, and modifying the network based on the performance information, including jointly optimizing by changing antenna parameter data, layer balancing, handover biasing per cell neighbor pair, modifying scheduling priorities, and optimizing sector face harmonic throughput. Balancing uplink and downlink coverages are considered in the joint optimization. Further, interference is detected, predicted (as needed) and mitigated.

公开(公告)号：US20190158131A1

公开(公告)日：2019-05-23

申请号：US16237922

申请日：2019-01-02

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell ,  Weihua Ye

IPC: H04B1/10 ,  H04B17/21 ,  H04B17/11 ,  G06N20/00 ,  H04B1/04

Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.

公开(公告)号：US10187098B1

公开(公告)日：2019-01-22

申请号：US15640382

申请日：2017-06-30

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell ,  Weihua Ye

IPC: H04B1/10 ,  H04B1/04 ,  H04B17/11 ,  H04B17/21 ,  G06N99/00

Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.

公开(公告)号：US11996958B2

公开(公告)日：2024-05-28

申请号：US17376764

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui

IPC: H04L25/02 ,  G06N20/00 ,  H01Q3/26 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/00 ,  H04L5/14 ,  H04L43/06 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/14 ,  H04W52/26 ,  H04W72/044 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/566 ,  H04W84/04 ,  H04J11/00

CPC classification number: H04L25/0222 ,  G06N20/00 ,  H01Q3/2617 ,  H01Q3/267 ,  H01Q3/2694 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/043 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0645 ,  H04B7/0695 ,  H04B7/088 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0073 ,  H04L5/14 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0202 ,  H04L25/0226 ,  H04L43/06 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/143 ,  H04W52/267 ,  H04W72/0473 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/569 ,  H04W84/04 ,  H04J11/0023

Abstract: Identifying a coherence time associated with a user equipment (UE) and a coherence bandwidth associated with the UE, determining a coherence block based on the coherence time and the coherence bandwidth, determining whether the coherence block satisfies a threshold, based on a first determination that the coherence block satisfies the threshold, employing a plurality of modular antenna arrays in multi-user (Mu)-multiple-input-multiple-output (MIMO) for the UE, and, based on a second determination that the coherence block does not satisfy the threshold, employing the plurality of modular antenna arrays in single-user (Su)-MIMO for the UE.

公开(公告)号：US11962438B2

公开(公告)日：2024-04-16

申请号：US18166354

申请日：2023-02-08

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Weihua Ye

IPC: H04L25/02 ,  G06N20/00 ,  H01Q3/26 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/00 ,  H04L5/14 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/14 ,  H04W52/26 ,  H04W72/044 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/566 ,  H04W84/04 ,  H04J11/00

CPC classification number: H04L25/0222 ,  G06N20/00 ,  H01Q3/2617 ,  H01Q3/267 ,  H01Q3/2694 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/043 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0645 ,  H04B7/0695 ,  H04B7/088 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0073 ,  H04L5/14 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0202 ,  H04L25/0226 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/143 ,  H04W52/267 ,  H04W72/0473 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/569 ,  H04W84/04 ,  H04J11/0023

Abstract: Aspects of the subject disclosure may include, for example, determining a coherence block for each user equipment (UE) of a plurality of UEs being served by the first cell, resulting in a plurality of coherence blocks, responsive to the determining, identifying a smallest coherence block from the plurality of coherence blocks, identifying a pilot sequence length based on the smallest coherence block, determining a plurality of orthogonal pilot sequences based on the identifying the pilot sequence length, designating, from the plurality of orthogonal pilot sequences, a first group of orthogonal pilot sequences for use in the first cell, and distributing, to each neighboring cell of a plurality of neighboring cells adjacent to the first cell, a respective group of orthogonal pilot sequences from a remainder of the plurality of orthogonal pilot sequences, to prevent pilot contamination between the first cell and the plurality of neighboring cells. Other embodiments are disclosed.

公开(公告)号：US11532882B2

公开(公告)日：2022-12-20

申请号：US17376793

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell ,  Brian Gavin

IPC: H04B1/00 ,  H01Q3/26 ,  H04B7/0452 ,  H04B17/12

Abstract: Aspects of the subject disclosure may include, for example, causing a reference antenna element of a first set of antenna elements of a first antenna array to transmit a first signal, determining for each antenna element of a second set of antenna elements of a second antenna array, a receive-related offset, relative to the reference element, based on inter-element propagation delays between the first and second sets of elements, causing each antenna element of the second set of elements to transmit a respective second signal, based on the reference antenna element receiving the respective second signals, calculating a respective transmit-related offset for each antenna element of the second set of antenna elements relative to the reference antenna element based on the inter-element propagation delays, and performing calibration between the first antenna array and the second antenna array based on the respective receive-related and transmit-related offsets. Other embodiments are disclosed.