Patents Assigned to Cable Television Laboratories, Inc.
  • Patent number: 11990944
    Abstract: A method for generating optical communication signals in a communication network includes (1) generating at least a first optical tone and a second optical tone using a quantum dot (QD) coherent comb laser (CCL), the first and second optical tones having different respective wavelengths, (2) modulating the first optical tone according to a first modulation signal to generate a first communication signal, and (3) modulating the second optical tone according to a second modulation signal to generate a second communication signal.
    Type: Grant
    Filed: February 10, 2022
    Date of Patent: May 21, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Haipeng Zhang, Mu Xu, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11989269
    Abstract: An association management system for establishing, maintaining, and monitoring associations between a personal identifier and an electronic device, includes a provider subsystem in operable communication with at least one of the personal identifier and the electronic device. The provider subsystem is configured to provision a person associated with the personal identifier, authenticate both of the personal identifier and the electronic device, and establish an association of the authenticated personal identifier to the authenticated electronic device. The system further includes a certificate authority subsystem for issuing at least one digital certificate to verify an identity of one or more digital entities operating on the management system, and a digital distributed ledger including a plurality of a consensus pool of participating processors. The digital distributed ledger is configured to verify, using the at least one digital certificate, transaction events of the association management system.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: May 21, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Steven John Goeringer, Brian Alexander Scriber
  • Patent number: 11991523
    Abstract: The present disclosure generally relates to apparatus, software and methods for thwarting radio spoofing techniques by requiring and sending data from multiple radios positioned such that the receiving client can determine that it came from multiple spatially separated radios due to the Angle of Arrival of each radio's signal.
    Type: Grant
    Filed: October 10, 2022
    Date of Patent: May 21, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: John C. Bahr, David Daniel Smith
  • Patent number: 11990937
    Abstract: An echo cancellation method includes steps of (a) extracting phase-distortion estimates, (b) reconstructing an echo signal, (c) generating a clean signal, and (d) producing a primary signal. Step (a) includes extracting, from a first phase signal, a plurality of phase-distortion estimates, the first phase signal having been estimated from an echo-corrupted signal received at a first coherent transceiver of a coherent optical network. Step (b) includes reconstructing an echo signal from the plurality of phase-distortion estimates and a transmitted signal transmitted by the first coherent transceiver. Step (c) includes generating a clean signal as a difference between the reconstructed echo signal and the first phase signal. Step (d) includes producing a primary signal by mapping each of a plurality of clean-phase estimates of the clean signal to one of a plurality of constellation symbols associated with a modulation scheme of the primary signal.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: May 21, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Zhensheng Jia, Junwen Zhang, Haipeng Zhang, Luis Alberto Campos
  • Patent number: 11984928
    Abstract: A method for estimating a chromatic dispersion of an optical-fiber channel is disclosed includes receiving, via the optical-fiber channel, a chromatically-dispersed signal having a symbol rate 1/T. The method also includes, for each chromatic-dispersion value of a plurality of chromatic-dispersion values, determining a respective clock-tone magnitude by: (i) applying, to the chromatically-dispersed signal or a signal derived therefrom, a chromatic dispersion equal to the chromatic-dispersion value to generate a dispersion-compensated signal, and (ii) extracting the clock-tone magnitude from at least one of a positive-frequency clock-tone and a negative-frequency clock-tone of the dispersion-compensated signal, the positive-frequency clock-tone and the negative-frequency clock-tone being spectral components of the dispersion-compensated signal at temporal frequencies 1/T or ?1/T respectively. The method also includes determining a maximum of the extracted clock-tone magnitudes.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: May 14, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Junwen Zhang, Zhensheng Jia, Mu Xu, Haipeng Zhang, Luis Alberto Campos
  • Patent number: 11979328
    Abstract: A method for traffic flow classification in a communication network includes (1) identifying a traffic flow in communication network traffic, (2) extracting features of the traffic flow, and (3) using a machine learning model, classifying the traffic flow at least partially based on the features of the traffic flow. The features of the traffic flow include, for example, a distribution of packet size values of a sliding window sample of the traffic flow, a distribution of inter-arrival time values of a sliding window sample of the traffic flow, standard deviation of data packet size, average of data packet size, standard deviation of data packet inter-arrival time, and average of data packet inter-arrival time.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: May 7, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Junwen Zhang, Bernardo Huberman, Jingjie Zhu, Karthik Sundaresan, Zhensheng Jia
  • Patent number: 11979339
    Abstract: A method for scheduling data transmission in a communication network includes (1) using a first scheduler module, scheduling first data packets for transmission via a first communication medium, (2) using a second scheduler module, scheduling second data packets for transmission via the first communication medium, and (3) using a coordinator, allocating transmission resources of the first communication medium among at least the first and second scheduler modules.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: May 7, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Randy Levensalor, Mark Bridges
  • Patent number: 11974159
    Abstract: A method for reducing communication network congestion includes (1) obtaining, from a first communication device, a scan of a first communication channel for presence of a first network identifier, (2) determining, from the scan of the first communication channel, that the first network identifier is being broadcasted on the first communication channel by a communication device other than the first communication device, and (3) in response to determining that the first network identifier is being broadcasted on the first communication channel, inhibiting broadcasting of the first network identifier on the first communication channel by the first communication device.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: April 30, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: John C. Bahr, Luther E. Smith
  • Patent number: 11968548
    Abstract: A method for reducing communication network performance degradation using in-band telemetry data includes (1) receiving, at an analytics engine of a communication network, first telemetry data from a first network element of the communication network, the first telemetry data being based on in-band telemetry data at the first network element; (2) determining from the first telemetry data that there is performance degradation in at least a portion of the communication network; and (3) in response to determining that there is performance degradation in at least the portion of the communication network, sending a message from the analytics engine to a second network element of the communication network.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: April 23, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Randy Levensalor, Joseph Padden
  • Patent number: 11968001
    Abstract: A method of reducing transmission power for an encoded data stream includes the steps of receiving an incoming data stream having equal probability for a plurality of incoming data bits, assigning a symbol scheme to the received data bits of the incoming data stream according to probabilities of occurrence of individual ones of the received data bits, and transmitting an outgoing data stream according to the assigned symbol scheme having a second average transmit power, different than the first average transmit power, for a plurality of outgoing symbols.
    Type: Grant
    Filed: February 27, 2023
    Date of Patent: April 23, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas H. Williams, Gregory Charles White
  • Patent number: 11968316
    Abstract: A system for enhanced public key infrastructure is provided. The system includes a computer device. The computer device is programmed to receive a digital certificate including a composite signature field including a plurality of signatures. The plurality of signatures include at least a first signature and a second signature. The computer device is also programmed to retrieve, from the digital certificate, a first key associated with the first signature from the digital certificate. The computer device is further programmed to retrieve the first signature from the composite signature field. In addition, the at least one computer device is programmed to validate the first signature using the first key.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: April 23, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventor: Massimiliano Pala
  • Patent number: 11962476
    Abstract: A software defined networking (SDN) controller for a communication network is provided. The SDN controller includes a northbound interface, a southbound interface, and a database as a service (DBaaS) layer. The northbound interface includes an application layer having one or more independent SDN applications. The southbound interface includes an adapter layer having one or more independent device adapters. The DBaaS layer includes a persistent DBaaS unit and a state DBaaS unit.
    Type: Grant
    Filed: January 2, 2023
    Date of Patent: April 16, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Randy Levensalor, Steven M. Pisarski, Christopher J. Corcimiglia, Dan Schrimpsher
  • Patent number: 11962826
    Abstract: An authenticating system and process for authenticating user devices to a access a service where access to certain portions of the service may be limited according to a access point or other device used by a user device to facilitate interfacing a user with the service. The authentication may be achieved without directly assessing a trustworthiness of the user devices, and optionally, without requiring a user thereof to complete a sign-on operation.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: April 16, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Seetharama R. Durbha, Oscar Marcia, Stuart Hoggan, Simon Krauss
  • Patent number: 11963075
    Abstract: A mesh wireless access point (WAP) includes a housing, a first radio assembly, a second radio assembly, and an internal communication link between the first and second radio assemblies. The housing is configured to be affixed to, or integrated with, a feature of a building. The first radio assembly is incorporated with the housing and configured to support a first wireless communication link, and the second radio assembly is incorporated with the housing and configured to support a second wireless communication link. The internal communication link is configured to transfer data packets between the first and second radio assemblies.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: April 16, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: John C. Bahr, David Daniel Smith
  • Patent number: 11956351
    Abstract: A first node of a network includes a quantum receiver, a classical transceiver, and an initial-key generator that cooperate with a second node of the network to receive an initial key via the quantum receiver. The first node includes a key-series generator that (i) decrypts, with the initial key, a first encrypted key of a series of encrypted keys to generate a first unencrypted key of a respective series of unencrypted keys and (ii) decrypts each subsequent encrypted key of the series of encrypted keys with a preceding unencrypted key of the series of unencrypted keys to generate a subsequent unencrypted key of the series of unencrypted keys. The first node includes one or both of a decryptor and an encryptor. The decryptor decrypts encrypted data using a last unencrypted key of the series of unencrypted keys. The encryptor encrypts unencrypted data using the last unencrypted key.
    Type: Grant
    Filed: March 27, 2023
    Date of Patent: April 9, 2024
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventors: Jing Wang, Bernardo Huberman, Luis Alberto Campos, Zhensheng Jia
  • Patent number: 11956354
    Abstract: A system for enhanced internet of things digital certificate security is provided. The system includes a computer device. The computer device is programmed to store, in a database, a plurality of statuses associated with a plurality of digital certificates. The computer device is also programmed to receive, from a first computer device, a status update for the first digital certificate. The computer device is further programmed to update the first status based on the status update. Subsequently to updating the first status, the computer device is programmed to receive a request for a connection from the first device. Subsequently to updating the first status, the computer device is also programmed to deny the request for a connection based on the first status.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: April 9, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Massimiliano Pala, Ronald H. Ih
  • Patent number: 11947403
    Abstract: A method for operating a termination device of an access communication network includes (a) performing, at the termination device, a first start-up procedure, (b) after performing the first start-up procedure, detecting, at the termination device, presence of a communication signal meeting one or more predetermined criteria, and (c) in response to detecting presence of the communication signal meeting the one or more predetermined criteria, performing, at the termination device, a second start-up procedure that is different from the first start-up procedure.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: April 2, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Jason W. Rupe, Douglas D. Jones, Stephen L. Burroughs
  • Patent number: 11949497
    Abstract: An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.
    Type: Grant
    Filed: June 13, 2022
    Date of Patent: April 2, 2024
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
  • Patent number: 11949783
    Abstract: Methods, systems, and devices for quantum key distribution (QKD) in passive optical networks (PONs) are described. A PON may be a point-to-multipoint system and may include a central node in communication with multiple remote nodes. In some cases, each remote node may include a QKD transmitter configured to generate a quantum pulse indicating a quantum key, a synchronization pulse generator configured to generate a timing indication of the quantum pulse, and filter configured to output the quantum pulse and the timing indication to the central node via an optical component (e.g., an optical splitter, a cyclic arrayed waveguide grating (AWG) router). The central node may receive the timing indications and quantum pulses from multiple remote nodes. Thus, the central node and remote nodes may be configured to communicate data encrypted using quantum keys.
    Type: Grant
    Filed: February 13, 2023
    Date of Patent: April 2, 2024
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventors: Jing Wang, Bernardo Huberman
  • Patent number: D1021811
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: April 9, 2024
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventors: Luther E. Smith, Aaron Quinto, Derek Matthews