Including Synchronization Patents (Class 398/154)
  • Patent number: 11876609
    Abstract: A time synchronization device focuses on a possibility of multiplexing a plurality of PTP domains on a transmission line with the same PTP and derives one time based on time information from a plurality of PTP domains. The time synchronization device includes PTP slave units belonging to corresponding PTP domains different from each other and configured to synchronize with times of the corresponding PTP domains, and a time integration unit 12 configured to use time information that is a time after the PTP slave unit synchronizes with the time of a master device belonging to the corresponding PTP domain and synchronization accuracy information that is an accuracy of synchronization of the PTP slave unit with the time of the master device to generate one integrated time.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: January 16, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasuhiro Mochida, Takahiro Yamaguchi
  • Patent number: 11848699
    Abstract: A system comprises an internal optical switch, couplable to a plurality of fibers, configured to automatically select fibers in succession from the plurality of fibers for testing. An optical test module, coupled to the internal optical switch, is configured to generate or receive one or more wavelengths of light on each selected fiber of the plurality of fibers. A communications interface, coupled to the internal optical switch and the optical test module, is configured to establish a communications link between the system and a second system to test each selected fiber.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: December 19, 2023
    Assignee: VeEX Inc.
    Inventor: Paul Chang
  • Patent number: 11848537
    Abstract: A tunable multi-mode laser is configured to generate a multi-mode optical signal at a tuned wavelength. The laser includes a semiconductor optical gain region, a feedback region, and a phase modulation region between the gain and feedback regions. Each of the regions may be monolithically integrated. A feedback loop is coupled to the tunable laser to receive the optical signal and includes at least one delay line. The delay line may also be monolithically integrated. An output of the delay line is fed back to the tunable multi-mode laser in order to provide at least one of self-injection locking and self-phase locked looping for the multi-mode tunable laser. Each of the optical gain region and phase modulation region of the laser is biased by the output of the delay line in order to reduce phase drift of the optical signal.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: December 19, 2023
    Assignee: Synergy Microwave Corporation
    Inventors: Ajay Kumar Poddar, Ulrich L Rohde, Afshin S. Daryoush
  • Patent number: 11824761
    Abstract: Methods and apparatus for detecting alignment markers in received data streams received via a plurality of data lanes are disclosed. Corresponding data streams may be received via respective data lanes in the plurality of data lanes, where each data stream includes alignment markers delineating data frames, and each alignment marker has a predefined bit pattern. For each respective data lane, a determination is made whether a specified portion of the received data stream has at least a threshold degree of similarity with a portion of the predefined bit pattern. In response to determining, for one of the plurality of data lanes, that the specified portion has at least the threshold degree of similarity, a frame boundary may be determined based on the specified portion, and a verification may be performed, that the specified portion of the received data stream corresponds to an alignment marker.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: November 21, 2023
    Assignee: Xilinx, Inc.
    Inventor: Ben J. Jones
  • Patent number: 11764874
    Abstract: A method for processing low-rate service data, an apparatus, and a system, where the method includes: mapping low-rate service data into a newly defined low-rate data frame, where a rate of the low-rate data frame matches a rate of the low-rate service data, the data frame includes an overhead area and a payload area, the payload area is used to carry the low-rate service data, a rate of the payload area in the low-rate data frame is not less than the rate of the low-rate service data, and the rate of the low-rate service data is less than 1 Gbps; mapping the low-rate data frame into one or more slots in another data frame, where a rate of the slot is not greater than 100 Mbps; mapping the other data frame into an optical transport unit (OTU) frame; and sending the OTU frame.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: September 19, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Wei Su
  • Patent number: 11764876
    Abstract: An optical frequency transfer device based on passive phase compensation and a transfer method are provided, where the device comprises a local side, a transfer link and a user side. Optical frequency transfer based on passive phase compensation is achieved by simple optical frequency mixing, microwave filtration, and frequency division processing in a passive phase compensation manner, and the device has simple system structure and high reliability.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: September 19, 2023
    Assignee: Shanghai Jiao Tong University
    Inventors: Liang Hu, Guiling Wu, Jianping Chen
  • Patent number: 11757558
    Abstract: A system comprises a transmitter that generates a combined signal including a first group of optical signals and a second group of optical signals, the first group of optical signals comprising M+X number of optical signals in a first polarization mode, the second group of optical signals comprising N number of optical signals in a second polarization mode, wherein the number of N and M optical signals comprise payload signals, where the X number of optical signals comprises at least one first pilot signal. The system may further include a receiver comprising a polarization recovery device that receives the combined signal and that recovers, from the combined signal, the first group of optical signals with the first polarization mode and the second group optical signals with the second polarization mode based on feedback indicative of at least one signal characteristic of the at least one first pilot signal.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: September 12, 2023
    Assignee: MELLANOX TECHNOLOGIES, LTD.
    Inventors: Segev Zarkovsky, Thomas H. Greer, III
  • Patent number: 11750290
    Abstract: An optical network receiver (ONU) circuit associated with a passive optical network (PON) is disclosed. The ONU circuit comprises one or more processors is configured to operate in a hunt state, wherein the one or more processors is configured to detect frame boundaries associated with an incoming data signal based on a detecting a predefined synchronization (psync) pattern associated with the incoming data signal and transition to a pre-sync state, when the predefined psync pattern is detected correctly. The one or more processors is further configured to operate in the pre-sync state, wherein the one or more processors is configured to perform forward error correction (FEC) decoding for the incoming data signal, in order to determine signal statistics associated with the incoming data signal.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: September 5, 2023
    Assignee: INTEL CORPORATION
    Inventors: Rainer Strobel, Gert Schedelbeck
  • Patent number: 11742946
    Abstract: Processing signals is disclosed. A method includes receiving a signal transmission with a nb/mb encoding scheme that maps n-bit words to m-bit symbols. In this scheme, m>n. The method further includes, for a first payload data word in the transmission, determining that the first payload data word corresponds to a valid payload data word, and as a result, assigning a first reliability metric to bits in the first payload data word. The method further includes for a second payload data word in the transmission, determining that the second payload data word does not correspond to a valid payload data word, and as a result, assigning a second reliability metric to bits in the second payload data word. The method further includes performing signal decoding using the assigned reliability metrics.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: August 29, 2023
    Assignee: L3HARRIS TECHNOLOGIES, INC.
    Inventor: L. Carl Christensen
  • Patent number: 11742949
    Abstract: Power saving is achieved in an optical wireless communication (VLC/LiFi) system by using a polling-based medium access control (MAC) scheme, wherein an access point can use a silent period when no one is polled (and EPs can thus sleep). When transmission queues are empty, the access point may apply the silent period which may be based on a minimum polling interval announced by broadcast.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: August 29, 2023
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Andries Van Wageningen
  • Patent number: 11722238
    Abstract: Methods and apparatuses for mapping processing and de-mapping processing in an optical transport network are provided. A Low Order Optical Channel Data Unit (LO ODU) signal is mapped into a payload area of an Optical Channel Data Tributary (ODTU) signal in units of M bytes. M is equal to the number of time slots of a High Order Optical Channel Payload Unit (HO OPU) that are to be occupied by the ODTU signal, and M is an integer larger than 1. Overhead information is encapsulated to an overhead area of the ODTU signal. Thereafter, the ODTU signal is multiplexed into the HO OPU. According to the application, an efficient and universal mode for mapping the LO ODU to the HO OPU is provided.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: August 8, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Maarten Vissers, Qiuyou Wu, Xin Xiao, Wei Su
  • Patent number: 11695444
    Abstract: A transceiver circuit includes a counter device, a compensation circuit and an adjusting circuit. The counter device is configured to count an execution time of a reception operation and accordingly generate a counting result. The compensation circuit is coupled to the counter device and configured to receive the counting result, determine a plurality of compensation values according to the counting result and sequentially output the compensation values in a transmission operation. The transmission operation follows the reception operation. The adjusting circuit is coupled to the compensation circuit, and configured to receive the compensation values and sequentially adjust amplitude of a signal according to the compensation values in the transmission operation. The compensation values are respectively applied to different portions of the signal.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: July 4, 2023
    Assignee: Realtek Semiconductor Corp.
    Inventors: Beng-Meng Chen, Chien-Jung Huang, Jhih-Yuan Ke
  • Patent number: 11689284
    Abstract: A coordination node can be configured to control communications between Visible Light Communication, VLC, Access Points, APs, and user equipments, UEs. The coordination node can: identify occurrence of an event relating to operation of a first VLC AP; determine that a second VLC AP and a third VLC AP each have communication coverage areas that are at least partially within a communication coverage area of the first VLC AP; control the second VLC AP to avoid it interfering with communications between the first VLC AP and a UE while it is within a common communication coverage area of the first VLC AP and the second VLC AP; and control the third VLC AP to avoid it interfering with communications between the first VLC AP and the UE while it is within a common communication coverage area of the first VLC AP and the second VLC AP.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: June 27, 2023
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Nicolas Seyvet, Hongxin Liang, Keven Wang
  • Patent number: 11641266
    Abstract: A device determines a first latency value of a first data flow from a first physical port of the device to a second physical port of the device and a second latency value of a second data flow from the second physical port to the first physical port, where the first latency value is less than the second latency value. The device determines a first target latency value based on the first latency value and the second latency value. The device adjusts a latency value of the first data flow to the first target latency value.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: May 2, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunlei Qi, Chunrong Li
  • Patent number: 11632174
    Abstract: Systems and methods for providing dispersion compensation to optical systems. In some embodiments, the disclosed dispersion compensation system may be capable of adjusting the amount of dispersion compensation. The disclosed dispersion compensation system may include a cascade of varactor circuit elements, each with separate bias control, and optionally may include one or more switches to enable or disable selective ones of the cascaded varactor circuit elements.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: April 18, 2023
    Assignee: ARRIS Enterprises LLC
    Inventor: Jun Wang
  • Patent number: 11603215
    Abstract: A flight direction indication system for an aerial vehicle having a plurality of rotors includes: for each of the plurality of rotors, at least one rotor blade having a plurality of light sources arranged along a radial extension of the rotor blade; and a control unit, coupled to the plurality of light sources of the rotor blades of the plurality of rotors. The control unit is configured to effect a coordinated control of the plurality of light sources of the rotor blades of the plurality of rotors, with the coordinated control yielding an image or a sequence of images across the plurality of rotors to an observer of the aerial vehicle and to to control the plurality of light sources of the rotor blades of the plurality of rotors on the basis of a momentary flight direction of the aerial vehicle.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: March 14, 2023
    Assignee: GOODRICH LIGHTING SYSTEMS GMBH
    Inventor: Carsten Pawliczek
  • Patent number: 11601211
    Abstract: A time synchronization system includes a master station (100) and slave stations (200) communicably connected to the master station (100). The master station (100) includes a contention determiner (114) and a time synchronization frame processing unit (113). The contention determiner (114) determines, based on receipt timings of a plurality of first time synchronization frames transmitted from the respective slave stations (200), whether the plurality of first time synchronization frames have a possibility of contention over relay processing. The time synchronization frame processing unit (113) discards, when the contention determiner (114) determines that the plurality of first time synchronization frames have the possibility of the contention, out of first time synchronization frames that have a possibility of mutual contention, a first time synchronization frame received later.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: March 7, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Akira Yamashita
  • Patent number: 11595120
    Abstract: A function of detecting an unused path through which actual data is not transmitted in a long-distance redundant network is realized at low cost. In an optical transmission system 20, each of the optical transceivers 21a and 21b that are connected to each other by an optical fiber cable 22 and disposed separately includes a protocol IC unit 35. The protocol IC unit 35 transmits an idle signal A1 with empty data using an optical signal P1 to an unused path of the optical fiber cable 22. At the time of this transmission, the protocol IC unit 35 outputs, to the transmission unit 33, a control signal C1 for performing, at a fixed modulation period, ON/OFF modulation on the optical signal P1 on which the idle signal A1 is superimposed. Also, the protocol IC unit 35 transmits an OAM signal O1 at an OAM period that is a period different from a modulation period, and performs control to turn ON the control signal C1 at the time of this transmission.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: February 28, 2023
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kana Masumoto, Toshiya Matsuda
  • Patent number: 11588550
    Abstract: An optical transmission device includes: a first receiver circuit, a second receiver circuit, a switch circuit, a terminator circuit, a packet buffer, a clock generator, and a signal generator. The first receiver circuit converts an optical signal received via a first route into a first electric signal. The second receiver circuit converts an optical signal received via a second route into a second electric signal. The switch circuit selects the first electric signal or the second electric signal. The terminator circuit extracts a packet from an electric signal selected by the switch circuit. The packet buffer stores the packet extracted by the terminator circuit. The clock generator generates a clock signal. The signal generator generates a continuous signal that includes the packet stored in the packet buffer by using the clock signal.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: February 21, 2023
    Assignee: FUJITSU LIMITED
    Inventors: Junichi Sugiyama, Yuji Ikegami
  • Patent number: 11575438
    Abstract: Devices, systems and methods for encoding information using optical components are described. Information associated with a first optical signal (e.g., an optical pump) is encoded onto the phase of a second optical signal (e.g., an optical probe) using cross phase modulation (XPM) in a non-linear optical medium. The optical signals are multiplexed together into the nonlinear optical medium. The probe experiences a modified index of refraction as it propagates through the medium and thus accumulates a phase change proportional to the intensity of the pump. The disclosed devices can be incorporated into larger components and systems for various applications such as scientific diagnostics, radar, remote sensing, wireless communications, and quantum computing that can benefit from encoding and generation of low noise, high resolution signals.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: February 7, 2023
    Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Brandon Walter Buckley, David Simon Perlmutter, Peter Thomas Setsuda DeVore, Apurva Shantharaj Gowda, Jason Thomas Chou
  • Patent number: 11569910
    Abstract: Aspects of the technology include establishing a primary communication link between a communication system of a first balloon and a communication system of a second balloon, detecting a movement of the second balloon relative to the first balloon that is expected to cause the primary communication link to become unavailable at a given time during the movement, establishing an RF communication link between an RF communication system of the first balloon and an RF communication system of the second balloon, detecting that the movement of the second balloon relative to the first balloon is such that the primary communication link between the communication system of the first balloon and the optical communication system of the second balloon can be re-established, and re-establishing the primary communication link between the communication system of the first balloon and the communication system of the second balloon.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: January 31, 2023
    Inventor: Cyrus Behroozi
  • Patent number: 11489667
    Abstract: A method of correcting gravity-induced error in quantum cryptography system, which is capable of improving accuracy when an optical cable is not installed and photons are transmitted through an artificial satellite, is disclosed. The method performed by an electronic device, comprises receiving a distance (r) to a satellite that receives polarized photon from a sender and transmits the polarized photon to a receiver, receiving an angular momentum per unit mass of the satellite (lobs), and calculating a rotation amount of the polarized photon, which is induced by a warp of space due to gravity by using the distance to the satellite and the angular momentum per unit mass of the satellite (lobs). The rotation 2? of the polarized photon is calculated by the following equation, sin ? ? ? ? ( r ) ? - l obs rr s ? 1 - r s r , wherein ‘rs’ is the Schwarzschild radius of the Earth.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: November 1, 2022
    Assignee: FIRST QUANTUM INC.
    Inventor: Do Yeol Ahn
  • Patent number: 11356190
    Abstract: A configurable wide area distributed antenna system is provided. At least one remote master unit of the system is in communication with at least one base station. The remote master unit includes a remote switch function that provides at least multiplexing in a downlink direction, demultiplexing in an uplink direction and routing of digital samples. The local master unit is located remote from the remote master unit. The local master unit is in communication with at least one remote antenna unit used to provide communication coverage in a select coverage area. The local master unit includes a local switch function providing at least demultiplexing in a downlink direction, multiplexing in an uplink direction and routing of digital samples. At least one communication link communicatively couples the remote master unit to the local communication unit with transport media interfaces.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: June 7, 2022
    Assignee: CommScope Technologies LLC
    Inventor: Van Erick Hanson
  • Patent number: 11265627
    Abstract: The disclosed system implements a bandwidth-reconfigurable optical interconnect, which couples optical signals between N interconnect inputs and N interconnect outputs. The system includes an arrayed waveguide grating router (AWGR), which provides cyclic, single-wavelength, all-to-all routing between N AWGR inputs and N AWGR outputs. The system also includes a wavelength-insensitive switch, which provides all-wavelength, all-to-all connectivity between N wavelength-insensitive inputs and N wavelength-insensitive outputs. The system additionally includes a wavelength-selective input switch, which selectively directs up to L wavelengths from each of the N interconnect inputs into a corresponding input of the wavelength-insensitive switch, wherein unselected wavelengths from each of the N interconnect inputs pass into a corresponding AWGR input.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: March 1, 2022
    Assignee: The Regents of the University of California
    Inventors: Roberto Proietti, Sung-Joo Ben Yoo
  • Patent number: 11212068
    Abstract: A node can include a clock; and mapper circuitry configured to determine a timestamp from the clock, and transmit the timestamp to a second node in a Radio over Ethernet (RoE) frame with the timestamp in a control subtype and with an operational code (opcode) that designates the timestamp is in the frame. The node can also include a demapper circuit configured to receive a second timestamp from the second node in a second RoE frame, and provide the second timestamp to a Differential Clock Recovery (DCR) circuit for adjustment of the clock to a second clock at the second node.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: December 28, 2021
    Assignee: Ciena Corporation
    Inventors: Xiaojin Liu, Vahid Naraghi, Bashar Abdullah
  • Patent number: 11196535
    Abstract: A local device of a time synchronization system includes a path switching unit that connects respective remote devices using individual optical fibers and switches the respective optical fibers sequentially in a cyclic order, a counter unit, a phase difference memory unit, and a table unit. The counter unit counts a pulse signal P1d demodulated by a PPS demodulation unit to obtain a count value. The phase difference memory unit stores the count value as path information in association with a phase difference detected by a phase detection unit, and outputs the phase difference associated with this path information indicated by the count value to the variable delay unit. When the count value is input, the table unit outputs a path switching signal for switching to the next optical fiber in the cyclic order to the path switching unit and the path switching unit performs switching to the next optical fiber.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 7, 2021
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hiroki Sakuma, Kaoru Arai, Takaaki Hisashima, Ryuta Sugiyama, Shunichi Tsuboi, Osamu Kurokawa, Kazuyuki Matsumura
  • Patent number: 11165527
    Abstract: In general, various aspects of the techniques described in this disclosure provide time synchronization for encrypted traffic in a computer network. In one example, the disclosure describes an apparatus, such as a network device, having a control unit for a network device in a computerized network having a topology of network devices; and a forwarding unit operative to determine a release time for sending a synchronization packet in accordance with a time synchronization protocol; modify the synchronization packet to include a release timestamp specifying the release time; sending a time value via sideband data associated with the synchronization packet, wherein the time value is based on the release time specified by the release timestamp; and schedule transmission of the synchronization packet for a time corresponding to the time value in the sideband data, the synchronization packet to be transmitted to a destination network device.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: November 2, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: John D. Johnson, Arthur T. Leung, Don Mark Royals, Jonathan B. Sadowsky
  • Patent number: 10998982
    Abstract: Disclosed in some examples, are optical devices, systems, and machine-readable mediums that send and receive multiple streams of data across a same optical communication path (e.g., a same fiber optic fiber) with a same wavelength using different light sources transmitting at different power levels—thereby increasing the bandwidth of each optical communication path. Each light source corresponding to each stream transmits at a same frequency and on the same optical communication path using a different power level. The receiver differentiates the data for each stream by applying one or more detection models to the photon counts observed at the receiver to determine likely bit assignments for each stream.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: May 4, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Amer Aref Hassan, Wei-Chen Chen
  • Patent number: 10992387
    Abstract: A method of combining optical signals from a plurality of optical fibers into a single optical signal includes receiving, at corresponding optical-signal receivers optically coupled to corresponding trunk fibers, respective optical signals. The method further includes determining, by the corresponding optical-signal receivers, when each respective optical signal is received. When the respective optical signal is received, the method includes performing the following steps: converting, by the corresponding optical-signal receiver, the respective optical signal to a corresponding electrical signal; transmitting, by the corresponding optical-signal receiver, the corresponding electrical signal to a corresponding input channel of an electrical-multiplexing device; and configuring the electrical-multiplexing device to select the corresponding input channel.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: April 27, 2021
    Assignee: Google LLC
    Inventors: Cedric Fung Lam, Xiangjun Zhao, Shuang Yin, Muthu Nagarajan, Tao Zhang, Liang Du, Adam Edwin Taylor Barratt, Changhong Joy Jiang, Claudio Desanti
  • Patent number: 10938475
    Abstract: A method of measuring lengths of optical fibers on forward and return paths is provided in order to synchronize clocks of optical nodes connected by asymmetrical optical fiber paths. The method includes calculating, by a first optical network device, a first propagation delay of a first optical signal transmitted at a first wavelength on a first optical fiber to the first optical network device from a second optical network device and a second propagation delay of a second optical signal transmitted at a second wavelength on the first optical fiber to the first optical network device from the second optical network device. The second wavelength is different from the first wavelength. The method further includes determining, by the first optical network device, a first length of the first optical fiber based on the first propagation delay and the second propagation delay.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: March 2, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Gilberto Loprieno, Carlo Tosetti
  • Patent number: 10932018
    Abstract: A method for removing static differential delays resulting from an independent transport of the client signals of a client signal bundle through an optical transport network, OTN, which comprises OTN mappers mapping received client signals to ODU signals transported to OTN demappers demapping received ODU signals to client signals, wherein a process slave, PS, at the OTN mapper end of said OTN network supplies continuously or in response to a received request information about timing relations between the client signals of said client signal bundle to a process master, PM, at the OTN demapper end of said OTN network used by the process master, PM, to remove the static differential delays between the client signals of the respective client signal bundle.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: February 23, 2021
    Assignee: ADVA OPTICAL NETWORKING SE
    Inventor: Oliver Bleck
  • Patent number: 10771150
    Abstract: A parallel-processing apparatus has information-processing apparatuses coupled mutually through an optical transmission line having channels. Each of the information-processing apparatuses has processors allocated to the channels of the optical transmission line, a controller and a display. When one of the processors detects a channel failure, the processor notifies a processor in the other information-processing apparatus of the channel failure, notifies the controller of the information-processing apparatus of the channel failure and notifies the controller of the information-processing apparatus of the notification of the channel failure from the other information-processing apparatus.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: September 8, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Atsushi Miki
  • Patent number: 10634776
    Abstract: Embodiments for accurately performing time of flight estimations are provided. These embodiments include using a first wireless device to monitor a wireless link and subsequently generate a wireless link estimation based on the monitoring. The embodiments also include deriving a correction metric based on the generated wireless link estimation and transmitting the correction metric from the first wireless device to a second wireless device. The second wireless device may then calculate a time of arrival of a first signal received from the first wireless communication device and correct any errors associated with the time of arrival calculation using the received correction metric. Further, the second wireless device may transmit the corrected time of arrival back to the first wireless device, such that the first wireless device can use the corrected time of arrival to estimate the time of flight of the first signal.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: April 28, 2020
    Assignee: Apple Inc.
    Inventors: Micha Anholt, Gilad Kirshenberg, Yoav Feinmesser
  • Patent number: 10567089
    Abstract: According to an embodiment, a transmission device is for a second quantum communication system sharing a quantum communication channel with a first quantum communication system, and includes a generator, a modulator, a controller, and a changer. The generator is configured to generate a photon. The modulator is configured to transmit a quantum signal generated by modulating the photon to a reception device. The controller is configured to control the generator and the modulator. The changer is configured to input, to the controller, control signals for changing an operation timing of the generator and an operation timing of the modulator when an error rate of the quantum signal of the first quantum communication system and an error rate of the quantum signal of the second quantum communication system are equal to or higher than a predetermined threshold.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: February 18, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Murakami, Yoshimichi Tanizawa
  • Patent number: 10484227
    Abstract: A correlation processor derives a correlation value indicating correlation between each of a plurality of reference signals produced by extracting symbols from the synchronization signal of each pattern at a predetermined interval and a received signal. A controller compares the correlation value for each pattern and for each sample derived by the correlation processor with a threshold value and, when at least one correlation value is larger than the threshold value, changes symbols extracted to produce respective reference signals before causing the correlation processor to perform the same process, incorporating the received signal newly acquired. A first selector selects one of the plurality of patterns when all symbols of the synchronization signal have been extracted to produce the reference signals and at least one correlation value is larger than the threshold value.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: November 19, 2019
    Assignee: JVC KENWOOD CORPORATION
    Inventor: Masayuki Tsuchida
  • Patent number: 10469170
    Abstract: Provided are an optical transceiver, an optical transmitter IC, and an optical receiver IC, which can be applied to both a case of coding an optical signal and a case of decoding an optical signal, and can suppress an influence of waveform degradation with an inexpensive circuit. The optical transceiver includes an optical transmitter, an optical receiver, and at least any one of: a first delay circuit included in the optical transmitter and configured to delay an input first multi-level digital signal by a delay time corresponding to an amplitude level of the first multi-level digital signal; and a second delay circuit included in the optical receiver and configured to delay an input second multi-level digital signal by a delay time corresponding to an amplitude level of the second multi-level digital signal.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: November 5, 2019
    Assignee: Lumentum Japan, Inc.
    Inventor: Nobuhiko Kikuchi
  • Patent number: 10389472
    Abstract: An optical line terminal (OLT) coupled to a plurality of optical network units (ONUs) through a passive optical network (PON). The OLT includes a transceiver configured to communicate via a management channel of a communication network with a plurality of OLTs. The communication includes sending or receiving a notification, wherein the notification includes the following: a source OLT identifier associated with a source OLT sending the notification, wherein the source OLT is configured to communicate over a first channel at a first wavelength of the PON; a destination OLT identifier associated with a destination OLT receiving the notification, wherein the destination OLT is configured to communicate over a second channel at a second wavelength of the PON; and an ONU identifier associated with a first ONU associated with the notification.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: August 20, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Yuanqiu Luo, Bo Gao, Frank Effenberger
  • Patent number: 10268056
    Abstract: An optical modulator comprises a silicon substrate, a buried oxide (BOX) layer disposed on top of the silicon substrate, and a ridge waveguide disposed on top of the BOX layer and comprising a first n-type silicon (n-Si) slab, a first gate oxide layer coupled to the first n-Si slab, a first p-type silicon (p-Si) slab coupled to the first gate oxide layer, and a light propagation path that travels sequentially through the first n-Si slab, the first gate oxide layer, and the first p-Si slab.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: April 23, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dawei Zheng, Hongbing Lei, Qianfan Xu, Xiao Shen, Yu Sheng Bai
  • Patent number: 10230493
    Abstract: A method for performing code block segmentation for wireless transmission using concatenated forward error correction encoding includes receiving a transport block of data for transmission having a transport block size, along with one or more parameters that define a target code rate. A number N of inner code blocks needed to transmit the transport block is determined. A number M—outer code blocks may be calculated based on the number of inner code blocks and on encoding parameters for the outer code blocks. The transport block may then be segmented and encoded according to the calculated encoding parameters.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: March 12, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: June Chul Roh, Pierre Bertrand
  • Patent number: 10200722
    Abstract: A device and method for collecting data from an event and retransmitting same with high value portions of the data identified. Low value portions of the data from the event are identified so, if desired, they may be removed and replaced by other data, such as stats from the event, stats from other events, and trivia relevant to the event. Indications alert end users that the data signal is returning to high value portions.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: February 5, 2019
    Assignee: SKYCAM, LLC
    Inventors: Nic Salomon, Stephen Wharton
  • Patent number: 10175779
    Abstract: In one example implementation according to aspects of the present disclosure, a method may include detecting, by a computing system, a touch input on the computing system by analyzing a change in a data stream from a sensor of the computing system by applying a first signal de-noising algorithm to the data stream. The method may further include determining, by the computing system, the nature of the detected touch input. Additionally, the method may include generating, by the computing system, a discrete cursor movement from a set of discrete cursor movements based on the determined nature of the detected touch input.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: January 8, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Oleg Vassilievich Nikolsky, Kas Kasravi
  • Patent number: 10157091
    Abstract: A method of tracking repeated performance problems in a machine is disclosed. The method comprises storing the faults in a computer memory, and assigning a classification value to the machine based on the frequency and number of the faults. Based on the classification value of the cash handing device it is determined whether the cash handing device needs to be serviced. The faults can be related to one of the hardware, the cash reject rate, image handling, crash rate, user claim rate, and check handling accuracy of the machine.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: December 18, 2018
    Assignee: Bank of America Corporation
    Inventors: Cheryl S. Bond, Rebecca L. Bell, Dion L. Bellamy, Pat Burton, Kristy M. Crist, Carol Giordano, James D. Goodwin, Jeffrey Hipple, Maggie M. Peretto, Devin D. Rhodes, Karen Y. Stavinoha, Susan A. Wilson
  • Patent number: 10148284
    Abstract: The present disclosure describes a wired communication device having media access control (MAC) circuitry and physical layer (PHY) circuitry. The MAC circuitry frames one or more data packets in accordance with a wired communication standard or protocol to provide one or more data frames. The one or more data frames include one or more packets that are separated by interpacket gaps (IPGs). The MAC circuitry selectively choses a duration of the IPGs to maintain an average IPG duration. The PHY circuitry encodes the one or more data frames in accordance with a line coding scheme that is efficiently represents different possible combinations for types of characters present in the one or more data frames.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: December 4, 2018
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Ankit Sajjan Kumar Bansal, Eric A. Baden
  • Patent number: 10146603
    Abstract: A method of tracking repeated performance problems in a machine is disclosed. The method comprises storing the faults in a computer memory, and assigning a classification value to the machine based on the frequency and number of the faults. Based on the classification value of the cash handing device it is determined whether the cash handing device needs to be serviced. The faults can be related to one of the hardware, the cash reject rate, image handling, crash rate, user claim rate, and check handling accuracy of the machine.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: December 4, 2018
    Assignee: Bank of America Corporation
    Inventors: Cheryl S. Bond, Rebecca L. Bell, Dion L. Bellamy, Pat Burton, Kristy M. Crist, Carol Giordano, James D. Goodwin, Jeffrey Hipple, Maggie M. Peretto, Devin D. Rhodes, Karen Y. Stavinoha, Susan A. Wilson
  • Patent number: 10057672
    Abstract: One example discloses an optical communication interface for a handheld device: wherein the handheld device, has an external surface; wherein the external surface includes an interior facing side and an exterior facing side; a first optical receiver, on the interior facing side of the handheld device, having an optical input and an electrical output; wherein the electrical output is coupled to circuitry; and wherein the optical input is configured to be optically coupled to a second optical transmitter on the exterior facing side of the handheld device.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 21, 2018
    Assignee: NXP B.V.
    Inventor: Steven Mark Thoen
  • Patent number: 10033478
    Abstract: Methods, systems, and devices are disclosed for using optical modes in optical waveguides to carry different optical communication signals. In one aspect, an optical device for optical MDM in optical communications includes an optical waveguide configured to support multiple optical waveguide modes and to carry light of different optical communication channels in different optical waveguide modes, respectively, of the multiple optical waveguide modes. The optical device includes an optical resonator configured to be capable of carrying an optical communication channel in one optical resonator mode and optically coupled to the optical waveguide to selectively couple the optical communication channel in the optical resonator into the optical waveguide to add a channel into the optical waveguide via optical mode division multiplexing. In another aspect, an optical mode division demultiplexing can be performed by coupling an optical waveguide and an optical resonator.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: July 24, 2018
    Assignee: Cornell University
    Inventors: Michal Lipson, Lian-Wee Luo, Lucas Heitzmann Gabrielli
  • Patent number: 10003406
    Abstract: An optical level control apparatus includes an input port, an output port, an optical device to assume a state of outputting light inputted to the input port from the output port and a state of not outputting the light inputted to the input port from the output port; a detector to detect an intensity of the light inputted to the input port, and a control unit to detect an input of an optical burst signal to the input port on the basis of a result of detecting the intensity of the light and to control the optical device so that the signal, in which to eliminate a field extending up to an elapse of a period of first time equal to or shorter than laser ON time period of the signal from a head of the signal with its input being detected, is output from the output port.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: June 19, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Setsuo Yoshida, Keisuke Harada
  • Patent number: 9997066
    Abstract: In an optical fiber network for transmitting optical signals in a robot having three or more joints connecting a plurality of links in series such that the links include two end links located at either end and intermediate links provided between the two end links, and the links connected by the joints are moveable relative to each other, a plurality of optical transceiver modules are provided on the links such that at least one optical transceiver module is provided on each link; and a plurality of optical fiber cables connect the optical transceiver modules in a ring; wherein at least one end of each optical fiber cable connecting the optical transceiver modules provided on different links is connected to one of the optical transceiver modules provided on the intermediate links.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: June 12, 2018
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryusuke Ishizaki, Shingo Iwasaki
  • Patent number: 9954617
    Abstract: An OLT (1) is formed by N optical transceivers (11), one PON control circuit (12), and one selection and distribution circuit (13). An optical transceiver selection control signal (SC) is transferred from the PON control circuit (12) to the selection and distribution circuit (13). The optical transceiver selection control signal (SC) indicates the timing of a discovery window, the timing of a grant, and a logical link identification number of a registered ONU assigned to the grant (a logical link identification number for a logical link with the registered ONU). The selection and distribution circuit (13) selects one optical transceiver (11-s (s is an integer falling within a range of 0 to N?1)) from the optical transceivers (11-0 to 11-N?1) based on the optical transceiver selection control signal (SC) from the PON control circuit (12).
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: April 24, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kenji Kawai, Yuki Arikawa, Tomoaki Kawamura, Nobuyuki Tanaka, Satoshi Shigematsu, Naoki Miura
  • Patent number: 9893807
    Abstract: A method of providing data using visible light communication (VLC) and a VLC system therefor is provided, the method for easy utilization, in a user terminal, of information provided by a lighting apparatus based on a position at which the lighting apparatus is provided.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: February 13, 2018
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Woo Choi, Jung Sik Sung, Seong Hee Park, Hyun Chul Kang, Hyun Joo Kang, Tae Gyu Kang