Patents Examined by Hanh Phan
  • Patent number: 10778330
    Abstract: Lights may be misconfigured during installation or after they are installed in a facility, such that these lights, also known as orphaned nodes, cannot receive control messages sent by a lighting control system. After installation, a mobile device can be used to identify the network a particular light source is communicating on, by use of a photodetector that detects, in the visible light signal emitted by a light source, data representing the network ID used by the light source. The mobile device can determine from that data whether or not the light source is communicating over the wrong network. If it is determined that a light source is on the wrong network, and therefore orphaned, the mobile device can switch its own configuration so as to be able to communicate to the orphaned light source, and provide instructions to reconfigure the light source to use a corrected network ID.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: September 15, 2020
    Assignee: Synapse Wireless, Inc.
    Inventor: Jeremy Jacob Zoller
  • Patent number: 10771156
    Abstract: Techniques are described herein for to improving optical wireless communications based on mobility patterns. In various embodiments, one or more mobility patterns observed in an area over time may be determined (302). The area may be illuminated by one or more lighting units (102) configured to transmit information using optical wireless communications (“OWC”). An applicable mobility pattern may be selected (308) from the one or more mobility patterns. Based on the selected mobility pattern, usage in the area of a plurality of OWC-based mobile apps (230) may be predicted (310). One or more OWC resources of at least one of the one or more lighting units may be allocated (312) for transmission of data to one or more of the plurality of OWC-based mobile apps operating on one or more mobile devices operated within the area. In various embodiments, the allocating may be based at least in part on the predicted usage.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: September 8, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Abhishek Murthy, Sirisha Rangavajhala, Olaitan Philip Olaleye, Talmai Brandão De Oliveira, Rohit Kumar, Jasleen Kaur, Alexandru Darie, Hassan Mohanna
  • Patent number: 10771152
    Abstract: A system and method for generating, based on optical network topology information, an optical model to represent an optical network; provisioning a new optical connection within the optical network: determining, using the optical model, a first bit error rate (BER) of the new optical connection; determining, using the optical network providing the new optical connection, a second BER of the new optical connection; determining, based on the first and the second BER, a BER excursion parameter of the new optical connection; training a margin allocator based on the BER excursion parameter of the new optical connection, and the first BER of the new optical connection; comparing the first BER of the new connection and a required optical margin to a threshold to determine a reliability of the new optical connection; and allocating, using the margin allocator, the required optical margin for additional optical connections of the optical network.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: September 8, 2020
    Assignee: Fujitsu Limited
    Inventor: Martin Bouda
  • Patent number: 10763969
    Abstract: An embodiment of the inventive concept includes an optical signal generating circuit, a controlling circuit, a waveform shaping circuit, and an output circuit. The optical signal generating circuit generates a first optical signal including pulses. The controlling circuit generates a control signal indicating a first pulse to be attenuated in magnitude among the pulses. The waveform shaping circuit attenuates a magnitude of the first pulse based on the control signal and the first optical signal, and generates a second optical signal including pulses corresponding to the pulses included in the first optical signal and the first pulse having the attenuated magnitude. The output circuit outputs an electric signal of bands corresponding to differences between frequencies of the pulses included in the second optical signal based on the second optical signal. A band corresponding to the first pulse among the bands of the electric signal is adjusted as the magnitude of the first pulse is attenuated.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: September 1, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sungil Kim, Jung Min Park, Minje Song, Minhyup Song, Jae-Sik Sim, Joon Tae Ahn
  • Patent number: 10749606
    Abstract: The present disclosure provides a pulse generation module, and an optical communication transmitter system and a non-linear equalizing method thereof, the pulse generation module includes: a mode detector that outputs a corresponding effective detection signal after detecting a preset mode, a controller that generates a corresponding selection signal according to a jump mode, and an equalizing pulse generator that generates a corresponding equalizing pulse signal according to the effective detection signal and the selection signal. A jump mode of each piece of data in a data stream is detected, and a corresponding equalizing pulse signal is generated based on the detected jump mode, to compensate for nonlinearity of a laser driving signal. Information about a rising edge and a falling edge is determined by detecting a jump mode of data, a balanced current is provided for a particular purpose, and nonlinearity of a laser is compensated by current output.
    Type: Grant
    Filed: July 4, 2019
    Date of Patent: August 18, 2020
    Assignee: PhotonIC Technologies (Shanghai) Co., Ltd.
    Inventors: Shang Hu, Tingyu Yao, Rui Bai, Xuefeng Chen, Pei Jiang
  • Patent number: 10742316
    Abstract: Embodiment of the present disclosure provide an apparatus and method to monitor a change of a polarization state resulted from an optical link and an optical receiver, in which by obtaining a change matrix of response matrices at two moments, and determining a parameter characterizing a change of a polarization state resulted from an optical link according to feature values of a change matrix in a Stokes space corresponding to the response matrices. The change of the polarization state resulted from the optical link is dynamically monitored in a real-time manner, independent of a polarization state of an input signal of the optical link, and no extra hardware and control may be needed.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: August 11, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Tong Ye, Zhenning Tao, Xiaofei Su
  • Patent number: 10727948
    Abstract: Optical transmitters, receivers, and transceivers implemented using a plurality of surface-coupled optical devices that can be manufactured on the same planar substrate and then post-processed to provide some of the devices with different respective partially transparent front mirrors compatible with and/or customized for different respective optical functions. When appropriately electrically biased and driven, different subsets of such devices can operate as lasers, optical modulators, optical amplifiers, and photodetectors, respectively. In this manner, an integrated array of such devices can be customized to provide the optical functions needed for the intended product. For example, an optical transmitter can be constructed using an integrated array that comprises three surface-coupled optical devices configured to operate as a laser, an optical modulator, and an optical amplifier, respectively.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: July 28, 2020
    Assignee: Nokia Solutions and Networks OY
    Inventors: Ting-Chen Hu, Stefano Grillanda
  • Patent number: 10727640
    Abstract: There is disclosed in one example a communication system, including: a data transmission interface; and a wavelength division multiplexing (WDM) silicon laser source to provide modulated data on a carrier laser via the data transmission interface, the WDM laser including a single laser cavity to generate an internally multiplexed multi-wavelength laser, the single laser cavity including a filter having a first grating period to generate a first wavelength and a second grating period to generate a second wavelength, the second grating period superimposed on the first grating period.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: July 28, 2020
    Assignee: Intel Corporation
    Inventors: Jie Sun, Haisheng Rong, Ranjeet Kumar
  • Patent number: 10720994
    Abstract: A system and method for a high-speed transmitter comprising a precoder configured to receive a sequence of input symbols and to generate for each received symbol a respective recoded symbol is disclosed. The transmitter includes a recoding unit configured for recoding each current received PAM-M based on the recoded symbol immediately preceding the current recoded symbol at the recoding unit, a shift unit configured for determining a shift value for each current received symbol from the recoding unit based on the symbol received from the recoding unit and immediately preceding the current symbol at the shift unit; and Feed-Forward Equalizer unit for applying the shift values to the respective symbols received from the recoding unit to generate a corresponding sequence of output symbols to be transmitted in an output stream.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: July 21, 2020
    Assignee: International Business Machines Corporation
    Inventors: Alessandro Cevrero, Pier Andrea Francese, Marcel A. Kossel, Christian I. Menolfi, Ilter Özkaya, Thomas H. Toifl
  • Patent number: 10721548
    Abstract: A system for routing signals in a Distributed Antenna System (DAS) includes one or more local Digital Access Units (DAUs) located at a local location and one or more remote DAUs located at one or more remote locations. Each of the one or more local DAUs includes an optical port coupled to an upstream unit. The upstream unit includes at least one of a repeater, a baseband unit, a Base Transceiver Station (BTS), or a DAU. The one or more remote DAUs are coupled to the one or more local DAUs via one or more optical cables. A distance between the local location and each of the one or more remote locations is greater than two kilometers.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: July 21, 2020
    Assignee: DALI SYSTEMS CO. LTD.
    Inventors: Shawn Patrick Stapleton, Sasa Trajkovic
  • Patent number: 10708009
    Abstract: Aspects of the disclosure provide techniques for automatic repeat request (ARQ) in a free-space optical communication (FSOC) architecture. These techniques, including block-selective ARQ, adaptive retransmission delay, and random seed scrambling, can be used individually or in combination to combat problems involving frame loss or corruption. These techniques enable the system to rapidly recover by streamlining the retransmission process. For instance, block-selective ARQ acknowledges variable length blocks of frames in the return stream from the receiver to the transmitter. Adaptive retransmission delay allows the retransmission delay to grow in the absence of feedback by the receiver, up to some defined limit. And with random seed sampling, a scrambling sequence is incorporated to aid with frame syncing, which avoids the need for a line code. These aspects of the technology provide a robust communication process, and also reduce overhead costs associated with unnecessary retransmissions.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: July 7, 2020
    Assignee: X Development LLC
    Inventors: Bruce Moision, Edward Keyes, Oliver Bowen, Devin Brinkley, Baris Erkmen
  • Patent number: 10701466
    Abstract: A node is configured for deployment in an optical network. The node includes an analog switch for routing an optical packet between input ports and output ports. The node also includes digital processing circuitry configured to generate first configuration information based on the optical packet prior to providing the optical packet to the analog switch. The analog switch is configured to route the optical packet between the input ports and the output ports based on the first configuration information in response to the optical packet arriving at the node in a first time interval. The optical packet is not processed by the digital processing circuit or results of processing are not used to configure the analog switch during a second time interval. The analog switch routes the optical packet between the input and output ports based on second configuration information during the second time interval.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: June 30, 2020
    Inventors: Brice Leclerc, Olivier Marcé, Dominique Chiaroni, Bogdan Uscumlic
  • Patent number: 10700779
    Abstract: The present disclosure relates to a free-space optical communications system that may make use of a controller and a digital micro mirror (DMM) assembly in communication with the controller. The DMM may have a plurality of independently controllable micromirror elements forming both an emitter and a receiver. A laser is included which is configured to generate an optical beam which may be applied to select ones of the first subpluralities of micromirror elements to generate a transmitted free space optical signal along a selected vector. A detector is included for receiving an incoming free space optical signal imaged by at least one of the micromirror elements.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: June 30, 2020
    Assignee: Lawrence Livermore National Security, LLC
    Inventor: Robert Matthew Panas
  • Patent number: 10694270
    Abstract: In an embodiment, a system for accelerated monitoring of optical transceivers includes a monitoring unit included in a port interface module of a network switch. The monitoring unit is configured to receive a monitoring configuration, obtain status information from a plurality of optical transceivers connected to the port interface module at an instance based on the monitoring configuration, and store the obtained status information and at least one associated timestamp in a memory. The memory is included in the port interface module and configured to provide the stored status information to a requestor external to the port interface module.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: June 23, 2020
    Assignee: Facebook, Inc.
    Inventors: Xu Wang, Rongchun Zhou, Olaf Moeller
  • Patent number: 10693559
    Abstract: An access network includes a first local network node configured to serve one or more first client devices according to a first network protocol, a second local network node configured to serve one or more second client devices according to a second network protocol different than the first network protocol, and a hub in operable communication with the first and second local network nodes over respective transport media. The hub contains a centralized network node configured to generate a first digitized radio frequency (RF) stream to the first local network node and a second digitized RF stream to the second local network node. The first digitized RF stream corresponds to the first network protocol and the second digitized RF stream corresponds to the second network protocol.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: June 23, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Luis Alberto Campos, Zhensheng Jia, Joseph Padden
  • Patent number: 10686546
    Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: June 16, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Alberto Arnaldo Tanzi, Stefano Piciaccia, Maurizio Gazzola, Lorenzo Ghioni
  • Patent number: 10683675
    Abstract: A system used to monitor and control a pool using a visual light communication system is disclosed.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 16, 2020
    Assignee: Elliptic Works, LLC
    Inventors: Sean Walsh, John Bouvier
  • Patent number: 10678008
    Abstract: An electro-optical aggregator system includes: a system board; a plurality of cards electrically connected to the system board, the plurality of cards each comporting with a standard form factor; and an electro-optical aggregator card comporting with the standard form factor and trafficking electrical signals with the plurality of cards, the electro-optical aggregator card including an optical transceiver chip through which the trafficked signals are optically communicated.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: June 9, 2020
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: John Norton, Kevin B. Leigh
  • Patent number: 10680710
    Abstract: The disclosure provides for a method for reacquiring a communication link between a first communication device and a second communication device. The method includes using one or more processors of the first communication device to receive historical data related to the first communication device and an environment surrounding the first communication device. The one or more processors are then used to determine one or more trends in the historical data related to fading of the communication link. Based on the one or more trends, the one or more processors are used to determine a starting time and an initial search direction for a search for the communication link. The one or more processors then execute the search at the starting time from the initial search direction.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: June 9, 2020
    Assignee: X Development LLC
    Inventors: Travis Lantz, Paul Csonka, Baris Ibrahim Erkmen
  • Patent number: 10672950
    Abstract: Devices, systems, and methods for providing wireless personal area networks (PANs) and local area networks (LANs) using visible and near-visible optical spectrum. Various constructions and material selections are provided herein. According to one embodiment, a free space optical (FSO) communication apparatus includes a digital data port, an array of light-emitting diodes (LEDs) each configured to have a transient response time of less than 500 picoseconds (ps), and current drive circuitry coupled between the digital data port and the array of LEDs.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: June 2, 2020
    Assignee: LUMEOVA, INC.
    Inventors: Mohammad Ali Khatibzadeh, Arunesh Goswami