公开(公告)号：US11876645B1

公开(公告)日：2024-01-16

申请号：US18189926

申请日：2023-03-24

Applicant: Cable Television Laboratories, Inc.

Inventor： Chad Riland ,  Rob Alderfer ,  Dennis Alan Brown ,  Jane Keys ,  John C. Bahr ,  Thomas Holtzman Williams ,  Derek Digiacomo ,  Austin Ralph Pahl ,  Mark Davies ,  Yuan Tian ,  Darshak Thakore ,  David Daniel Smith

IPC: H04L12/46 ,  H04L12/66 ,  H04W88/10

CPC classification number: H04L12/4641 ,  H04L12/66 ,  H04W88/10

Abstract: A method operable by a communication network gateway for providing communication services includes (a) supporting respective communication links with a plurality of communication service providers, (b) supporting a plurality of virtual local area networks (VLANs), (c) associating each virtual local area network (VLAN) with a respective communication service provider of the plurality of communication service providers, and (d) routing data between each VLAN and the respective communication link of the respective communication service provider associated with the VLAN.

公开(公告)号：US20220239537A1

公开(公告)日：2022-07-28

申请号：US17717571

申请日：2022-04-11

Applicant: Cable Television Laboratories, Inc.

Inventor： Douglas D. Jones ,  Luis Alberto Campos ,  Thomas Holtzman Williams

IPC: H04L27/26 ,  H04Q11/00 ,  H04B10/27 ,  H04L5/00 ,  H04B10/548

Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.

公开(公告)号：US11316715B1

公开(公告)日：2022-04-26

申请号：US17382139

申请日：2021-07-21

Applicant: Cable Television Laboratories, Inc.

Inventor： Jason W. Rupe ,  Thomas Holtzman Williams ,  Lin Cheng ,  Jingjie Zhu

IPC: H04L25/02

Abstract: A method for automatically identifying an impairment of a communication medium includes (1) obtaining a spectrum response of communication signals traveling through the communication medium, (2) converting the spectrum response from a frequency domain to a time domain, to generate an impulse response, and (3) identifying the impairment of the communication medium at least partially based on one or more characteristics of the impulse response.

公开(公告)号：US11303486B2

公开(公告)日：2022-04-12

申请号：US16806969

申请日：2020-03-02

Applicant: Cable Television Laboratories, Inc.

Inventor： Douglas D. Jones ,  Luis Alberto Campos ,  Thomas Holtzman Williams

IPC: H04L27/26 ,  H04Q11/00 ,  H04B10/27 ,  H04L5/00 ,  H04B10/548

Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.

公开(公告)号：US20210399936A1

公开(公告)日：2021-12-23

申请号：US17409522

申请日：2021-08-23

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Thomas Holtzman Williams ,  Lin Cheng

IPC: H04L27/26 ,  H04B1/7103 ,  H04L27/00 ,  H04L27/34

Abstract: A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.

公开(公告)号：US11159250B2

公开(公告)日：2021-10-26

申请号：US16384846

申请日：2019-04-15

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Thomas Holtzman Williams ,  Luis Alberto Campos ,  Jason W. Rupe

IPC: H04B17/00 ,  H04B17/29 ,  H04H20/77 ,  H04L12/28 ,  H04B7/10 ,  H04L5/00

Abstract: A transmitter is configured to transmit data to a receiver over a communications network. The transmitter includes a memory for storing computer-executable instructions and a processor in operable communication with the memory. The processor is configured to (i) collect spectrum data of a spectral band over a first sampling interval, and (ii) store the collected spectrum data in the memory. The transmitter further includes a common path distortion (CPD) detection unit configured to (i) sample the collected spectrum data, over a second sampling interval less than the first sampling interval, for a plurality of sub-bands within the spectral band, (ii) analyze the spectral band and each sub-band for indications of common path distortion, and (iii) inject a test signal configured for detection at a headend of the communications network. The transmitter further includes a modem portion configured to operably communicate with the headend and the receiver.

公开(公告)号：US20190319718A1

公开(公告)日：2019-10-17

申请号：US16384846

申请日：2019-04-15

Applicant: CABLE TELEVISION LABORATORIES, INC

Inventor： Thomas Holtzman Williams ,  Luis Alberto Campos ,  Jason W. Rupe

IPC: H04B17/00 ,  H04B17/29 ,  H04B7/10 ,  H04H20/77 ,  H04L12/28

Abstract: A transmitter is configured to transmit data to a receiver over a communications network. The transmitter includes a memory for storing computer-executable instructions and a processor in operable communication with the memory. The processor is configured to (i) collect spectrum data of a spectral band over a first sampling interval, and (ii) store the collected spectrum data in the memory. The transmitter further includes a common path distortion (CPD) detection unit configured to (i) sample the collected spectrum data, over a second sampling interval less than the first sampling interval, for a plurality of sub-bands within the spectral band, (ii) analyze the spectral band and each sub-band for indications of common path distortion, and (iii) inject a test signal configured for detection at a headend of the communications network. The transmitter further includes a modem portion configured to operably communicate with the headend and the receiver.

公开(公告)号：US11888545B1

公开(公告)日：2024-01-30

申请号：US17334884

申请日：2021-05-31

Applicant: Cable Television Laboratories, Inc.

Inventor： Thomas Holtzman Williams ,  Belal Hamzeh ,  Luis Alberto Campos

IPC: H04B3/23 ,  H04N7/173 ,  H04B10/25 ,  G06F1/02 ,  H04B3/493 ,  H04L5/14 ,  H04N21/61

CPC classification number: H04B3/235 ,  H04B3/238 ,  H04B10/25891 ,  H04N7/17309 ,  G06F1/022 ,  H04B3/493 ,  H04L5/14 ,  H04N21/6118 ,  H04N21/6168

Abstract: Facilitating echo cancellation within communication networks is contemplated, such as but not necessarily limited to facilitating echo cancellation within full-duplex (FDX) communication networks. The echo cancellation may optionally be performed with an echo canceller included as part of or otherwise associated with an FDX node used to facilitate interfacing signaling between a digital domain and an analog domain of a FDX or other communication network.

公开(公告)号：US11533105B1

公开(公告)日：2022-12-20

申请号：US17336004

申请日：2021-06-01

Applicant: CABLE TELEVISION LABORATORIES, INC.

Inventor： Thomas Holtzman Williams ,  Lin Cheng

IPC: H04B10/07 ,  H04B10/071 ,  H04B3/48 ,  H04B10/077 ,  G01R31/08

Abstract: A method is provided for calibrating a terminal device connected to a transmission line containing an impairment. The method includes steps of obtaining a sequence of frequency domain samples for a digital signal transmitted to the terminal device, determining a reflection coefficient from the obtained frequency domain sequence and a reflection signal arising from the impairment, converting the sequence of frequency domain samples and the frequency domain reflection signal into the time domain to generate a complex time domain sample sequence having a real I time component and an imaginary Q time component, correcting the time domain sample sequence into a corrected time sequence having a phase value of the Q component corresponding to a phase value of the I component, calculating a correcting spin coefficient from the corrected time sequence, and calibrating the terminal device with the correcting spin coefficient to mitigate a rotation of the reflection coefficient.

公开(公告)号：US11451020B2

公开(公告)日：2022-09-20

申请号：US16252233

申请日：2019-01-18

Applicant: Cable Television Laboratories, Inc.

Inventor： Luis Alberto Campos ,  Thomas Holtzman Williams ,  Zhensheng Jia

IPC: H02G1/16 ,  H01R24/56 ,  H04L12/28 ,  H04H60/93 ,  H02G1/08 ,  G02B6/50 ,  H02G1/12

Abstract: Generating an assessment of the suitability of cables, ducts, tubes, pipes and/or other hollow-type of conduits to extraction of cores, conductors, insulation, etc. included therein while still buried in the ground or otherwise positioned out-of-sight so as to be unavailable for visual and/or physical inspection is contemplated. The assessment may be used to indicate a suitability of a cable buried in the ground of a hybrid fiber coaxial (HFC) cable plant to extraction of the type whereby a core of the cable may be extracted using hydraulics while still buried.