Determination Of Communication Parameter Patents (Class 398/25)
  • Patent number: 11368390
    Abstract: A first network device is configured with a rule preventing network traffic from travelling from the first network device to one or more other network devices. The first network device is configured to receive and distribute network traffic to the one or more other network devices. A second network device receives and distributes network traffic to the one or more other network devices. The first network device determines that the second network device has failed. In response to determining that the second network device has failed, the first network device removes the rule so that the first network device receives and distributes network traffic to the one or more other network devices.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: June 21, 2022
    Assignee: Arista Networks, Inc.
    Inventors: Bharathram Pattabhiraman, Swati Patel
  • Patent number: 11368214
    Abstract: Methods and systems for automated health assessment of fiber optic links of a fiber optic communication system are described. Tables are used to describe the fiber optic links, including access addresses to communication modules used in the links. Telemetry data representative of operation of the communication modules can be read via the access addresses into a central station. OTDR/OFDR measurement data of fiber optic segments used in the links can be read via the access addresses into the central station. The telemetry and/or OTDR/OFDR measurement data can be used by the central station for comparison against reference data to assess health of the links. The communication modules locally and continuously capture the telemetry data to detect transient events that may be the result of tampering of the links.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: June 21, 2022
    Assignee: ULTRA COMMUNICATIONS, INC.
    Inventors: Joseph F. Ahadian, Vahid Nazer, Sandra Skendzic, Charles B. Kuznia, Richard J. Weiss
  • Patent number: 11349573
    Abstract: A communication network includes a coherent optics transmitter, a coherent optics receiver, an optical transport medium operably coupling the coherent optics transmitter to the coherent optics receiver, and a coherent optics interface. The coherent optics interface includes a lineside interface portion, a clientside interface portion, and a control interface portion.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: May 31, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Zhensheng Jia, Matthew D. Schmitt
  • Patent number: 11349575
    Abstract: Two photons in an entangled state of polarization is created by parametric down conversion of a pump light. A first photon of the two photons is sent to a sender while a second photon of the two photons is sent to a receiver. The second photon is divided into a first component and a second component. The receiver makes the first component interact with an isotropic nonlinear optical medium. The sender selects the angle of a polarizer according to a signal that he wants to transmit to the receiver and measures the first photon after it passes the polarizer. The receiver mixes the first component and the second component by a half beam splitter. The receiver knows the signal by measuring the probability of photon detection of two output lights from the half beam splitter.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: May 31, 2022
    Inventor: Narumi Ohkawa
  • Patent number: 11349564
    Abstract: A crosstalk estimation system includes: a light source unit that generates a polarization-multiplexed light, which is a polarized light having multiplexed polarizations, of each wavelength in a sideband of a modulated signal and emits the polarization-multiplexed light of each wavelength; a multiplexer that multiplexes the modulated signal with the polarization-multiplexed light for each core, which is associated with one of the wavelengths; a transmission line that transmits the modulated signal multiplexed with the polarization-multiplexed light of each wavelength through a different core; a separation unit that separates the polarization-multiplexed light from the modulated signal multiplexed with the polarization-multiplexed light for each core; a measurement unit that generates light intensity data on the polarization-multiplexed light of each wavelength; and an estimation unit that estimates a crosstalk between the cores based on a difference in light intensity between the polarization-multiplexed light
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: May 31, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akira Isoda, Takayuki Mizuno, Koki Shibahara, Takayuki Kobayashi, Yutaka Miyamoto
  • Patent number: 11342990
    Abstract: A state estimating device includes a pre-processing unit and an estimating unit. The pre-processing unit acquires data representing at one or more of a phase of a signal transmitted from a transmission unit of a transmission device and received at a reception unit of another transmission device via a transmission path, a reception strength, a reception quality, a voltage after conversion into an electric signal, and a signal processing parameter used in reception processing, and processes the acquired data into feature data to be used for state estimation. The estimating unit estimates a state of the transmission path, an abnormal state of the transmission unit, or an abnormal state of the reception unit, on the basis of the feature data.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: May 24, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Seiki Kuwabara, Wataru Kawakami, Hideki Nishizawa, Seiji Okamoto, Akira Hirano, Shokei Kobayashi, Tetsuro Inui, Takuya Oda, Fumikazu Inuzuka, Takafumi Tanaka
  • Patent number: 11277206
    Abstract: A transmitter maps an N-bit sequence to a point selected from a four-dimensional (4D) constellation consisting of 2N points which form a subset of a Cartesian product of first and second two-dimensional (2D) constellations, the first constellation consisting of M1 points divided into first, second, and third points, and the second constellation consisting of M2 points divided into fourth, fifth, and sixth points, wherein M1, M2?5, and wherein log2(M1×M2)>N. The subset includes any 4D point that is generated by combining any one of the M1 points and any one of the fourth points; includes any 4D point that is generated by combining any one of the first points and any one of M2 points; and excludes any 4D point that is generated by combining any third point and any sixth point. An optical signal representing the selected point is transmitted to a receiver.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: March 15, 2022
    Assignee: Ciena Corporation
    Inventors: Shahab Oveis Gharan, Michael Andrew Reimer, James St. Leger Harley
  • Patent number: 11277207
    Abstract: Methods and apparatuses for IQ time skew calibration in a coherent transceiver are described. A four-channel signal is received. A set of inputs is constructed for a 4×8 MIMO equalizer by converting the four-channel signal into four complex inputs that each have a phase shift corresponding to an estimated carrier frequency offset. The set of inputs further includes conjugate replicas of the four complex inputs. Using output from the 4×8 MIMO equalizer, equalizer coefficients are calculated by minimizing error between the MIMO output and a reference signal. Receiver and transmitter IQ skew are estimated using the equalizer coefficients, by converting the equalizer coefficients form the time domain to the frequency domain to determine receiver and transmitter IQ differential phase responses, which are indicative of respective receiver and transmitter IQ skew in the time domain. Skew compensation is then performed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: March 15, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wing Chau Ng, Xuefeng Tang, Zhuhong Zhang
  • Patent number: 11245483
    Abstract: A packet processing method includes receiving a first packet by a first receiving interface of a media conversion module of a first network device, where the first packet includes a first alignment marker (AM), sending a second packet by a first sending interface of the media conversion module, where the second packet includes the first AM, and the second packet is the first packet processed by the media conversion module, and calculating a time interval T1 between a time at which the media conversion module receives the first packet and a time at which the media conversion module sends the second packet, where the T1 is used to compensate for a first timestamp at which the first network device receives or sends the third packet.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: February 8, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jinhui Wang, Liqing Chen, Hongwei Niu, Yunlei Qi
  • Patent number: 11233568
    Abstract: A receiver is configured to detect, at a communication interface, a received signal that suffers from degradations incurred over a communication channel. The receiver applies an adaptive filter to a series of received blocks of a digital representation of the received signal, thereby generating respective filtered blocks.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: January 25, 2022
    Assignee: Ciena Corporation
    Inventors: Shahab Oveis Gharan, Ramin Babaee, Martin Bouchard, Kim B. Roberts
  • Patent number: 11233574
    Abstract: Real-time systems and methods prevent duplication of independent signal streams in a coherent receiver subject to source separation controlled by multiplicative coefficients under adaptive feedback control. In various embodiments, this is achieved by first obtaining a first set of coefficients associated with a first signal stream and a second set of coefficients associated with a second signal stream. In response to the sets of coefficients satisfying a condition, the first set modified into a set of coefficients that is mutually orthogonal with respect to and replaces the second set of coefficients. The resulting series of coefficient values may then be used to perform source separation of independent signal streams without duplicating independent signal streams.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: January 25, 2022
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Charles Razzell, Edem Ibragimov
  • Patent number: 11223421
    Abstract: A skew compensation system for a coherent optical communication network includes a transmitter and a receiver in operable communication with an optical transport medium of a coherent optical network. The transmitter includes a first transmitter-side tunable delay line configured to delay transmission of a first signal by a first skew amount, thereby producing a pre-compensated first signal. The receiver includes a first receiver-side tunable delay line configured to delay transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by a second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated (i.e., fully compensated).
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: January 11, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Mu Xu, Junwen Zhang, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11201671
    Abstract: A communication system includes: a plurality of cameras that generate image data by capturing images; a server that stores the image data generated by each of the plurality of cameras; and a plurality of transmission devices in one-to-one correspondence with the plurality of cameras. Each of the plurality of transmission devices transmits light including, as a visible light communication signal, information related to communication for accessing a storage location at which the image data generated by a corresponding one of the plurality of cameras is stored in the server.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: December 14, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Nobuhiko Hashida
  • Patent number: 11190306
    Abstract: A system for determining a channel margin of a data transmission channel (DTC) using error correction under real-world channel conditions is described. The system includes a monitoring unit, an operating state determining unit and a data processing unit. The monitoring unit monitors data transmission along the DTC and estimates a statistical distribution of errors (H) in the transmission of data. The operating state determining unit determines a current value of an operating state parameter for the DTC. The data processing unit determines a reference channel margin associated with said current value of the operating state parameter for a reference channel and the error correction scheme employed, provides a statistical distribution of errors (HR) associated with said reference channel for said current value of said operating state parameter, compute a deviation of H and HR, and computes a reduction of the reference channel margin.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: November 30, 2021
    Assignee: XIEON NETWORKS S.a.r.l.
    Inventor: Stefano Calabró
  • Patent number: 11146339
    Abstract: A method of operating a quantum information processing system. The quantum information processing system includes an array of connected qubits. The method of operating the quantum information processing system uses a linear network coding solution to performing an operation between the quantum states of two or more qubits of the array.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: October 12, 2021
    Assignee: OXFORD UNIVERSITY INNOVATION LIMITED
    Inventors: Jonathan Robert Niel de Beaudrap, Steven Herbert
  • Patent number: 11128553
    Abstract: Technologies for switching network traffic include a network switch. The network switch includes one or more processors and communication circuitry coupled to the one or more processors. The communication circuitry is capable of switching network traffic of multiple link layer protocols. Additionally, the network switch includes one or more memory devices storing instructions that, when executed, cause the network switch to receive, with the communication circuitry through an optical connection, network traffic to be forwarded, and determine a link layer protocol of the received network traffic. The instructions additionally cause the network switch to forward the network traffic as a function of the determined link layer protocol. Other embodiments are also described and claimed.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: September 21, 2021
    Assignee: Intel Corporation
    Inventors: Matthew Adiletta, Aaron Gorius, Myles Wilde, Michael Crocker
  • Patent number: 11109123
    Abstract: It is difficult to improve the usage efficiency of an optical communication network due to the passband narrowing effect in a wavelength selection process in an optical communication network using a wavelength division multiplexing system; therefore, an optical network management apparatus according to an exemplary aspect of the present invention includes wavelength selection information generating means for generating wavelength selection information on a wavelength selection process through which an optical path accommodating an information signal goes, with respect to each optical path; and wavelength selection information notifying means for notifying an optical node device through which the optical path goes of the wavelength selection information.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: August 31, 2021
    Assignee: NEC CORPORATION
    Inventors: Hitoshi Takeshita, Shinsuke Fujisawa, Tomoyuki Hino, Akio Tajima
  • Patent number: 11095366
    Abstract: The present disclosure discloses a visible light communication apparatus, a lock device, and a visible light communication method. The visible light communication method includes: transmitting, by at least two transmitting devices, visible light carrying respective corresponding information; and sending, by a receiving device, an instruction for correct matching upon determining, according to received superposed visible light, that the superposed visible light meets a preset condition; where the corresponding information includes at least one of a frequency, luminance, and a color of the visible light transmitted by the transmitting devices and a relative position of the transmitting devices to the receiving device. The method can improve security of visible light communication.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 17, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventor: Wei Cao
  • Patent number: 11088766
    Abstract: Methods and apparatuses for IQ time skew calibration in a coherent transceiver are described. A four-channel signal is received. A set of inputs is constructed for a 4×8 MIMO equalizer by converting the four-channel signal into four complex inputs that each have a phase shift corresponding to an estimated carrier frequency offset. The set of inputs further includes conjugate replicas of the four complex inputs. Using output from the 4×8 MIMO equalizer, equalizer coefficients are calculated by minimizing error between the MIMO output and a reference signal. Receiver and transmitter IQ skew are estimated using the equalizer coefficients, by converting the equalizer coefficients form the time domain to the frequency domain to determine receiver and transmitter IQ differential phase responses, which are indicative of respective receiver and transmitter IQ skew in the time domain. Skew compensation is then performed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: August 10, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wing Chau Ng, Xuefeng Tang, Zhuhong Zhang
  • Patent number: 11038722
    Abstract: One example includes an equalizer system. The system includes a filter system configured to receive digital sample blocks associated with an input signal and to provide equalized digital sample blocks associated with the respective digital sample blocks based on adaptive tap weights. Each of the digital sample blocks includes samples and each of the equalized digital sample blocks includes equalized samples. The system also includes a sample set selector to select a subset of equalized samples from each of the equalized digital sample blocks at the output of the filter and an error estimator configured to implement an error estimation algorithm on the subset of the equalized samples to determine a residual error associated with the equalized samples. The system further includes a tap weight generator configured to generate the adaptive tap weights in response to the residual error and to provide the adaptive tap weights to the filter.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: June 15, 2021
    Assignee: ViaSat, Inc.
    Inventors: Sameep Dave, Fan Mo, Yuri Zelensky, Murat Arabaci
  • Patent number: 10972178
    Abstract: A parameter analysis method executable by a computer, the method includes training a model configured to output an index value relating to a characteristic of an optical signal, and changing the characteristic of the optical signal usable for training the model.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: April 6, 2021
    Assignee: FUJITSU LIMITED
    Inventor: Takahito Tanimura
  • Patent number: 10965380
    Abstract: Various example embodiments relate to an apparatus and method for nonlinear equalization based on an absolute operation, and may be configured to generate coefficients and compensate for nonlinear distortions by using an absolute operation for an input signal based the coefficients.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: March 30, 2021
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hoon Kim, Yukui Yu
  • Patent number: 10924427
    Abstract: A network switch comprises a plurality of optical physical transport layer resources and a control plane management engine capable of receiving, via a request over a network interface, at least one control plane provisioning policy that maps at least one upper layer resource to at least some of the optical physical transport layer resources. The control plane management engine provisions at least some of the optical physical transport layer resources for use by at least one virtual control plane, which operates according to rules of the control plane provisioning policy. The control plane management engine is configured to manage network traffic among the at least some optical physical transport layer resources and external networking nodes according to the at least one virtual control plane.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: February 16, 2021
    Assignee: Nant Holdings IP, LLC
    Inventor: Thomas Wittenschlaeger
  • Patent number: 10911156
    Abstract: A device for increasing a number of optical signal channels detectable by an optical channel performance monitor having M detectors includes an input to receive an optical signal, a filter assembly coupled to the input, a controller connected to the filter assembly, and an output. The controller selectively configures the filter assembly to filter the optical signal in a repeating sequence of periodic passbands. The output transfers an output of the filter assembly to an optical channel performance monitor.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: February 2, 2021
    Assignee: The Boeing Company
    Inventor: Nathan D. Hiller
  • Patent number: 10897307
    Abstract: A data communication systems including a main channel that includes means for sending a signal, means for transmitting the signal and means for receiving the signal, the sending means sending signals at a known frequency. The communication system includes a stand-by channel that includes the following devices: a device for temporarily stopping the sent signal at instants known as stopping instants for a constant length of time that corresponds to the sending of a first determined number of sent signals, the stopping instants corresponding to temporal coding of a stand-by signal; a device for summing the amplitudes of the received signals, the summing being carried out on a second determined number of received signals; a device for temporally determining the instants corresponding to the minima of the summed signal, the determined instants having the same temporal coding as the stopping instants.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: January 19, 2021
    Assignee: THALES
    Inventor: Pascal Rousseau
  • Patent number: 10892823
    Abstract: An optical power compensation method and a device relating to the communications field comprises: a first node that obtains a first optical power and a first timepoint, receives at least two second optical powers sent by a second node, obtains second timepoints corresponding with the at least two second optical powers, where the second timepoint is a timepoint at which the first node receives the second optical power, and determines a target timepoint from the second timepoints according to a preset delay and the first timepoint. The first node determines a variation of a span loss according to a target optical power and the first optical power, where the target optical power is a second optical power corresponding to the target timepoint, and adjusts a gain value and/or an attenuation value of the first node according to the variation of the span loss.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: January 12, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Tianbing Sun, Wei Liu, Zhenqing Zhao, Mengying He
  • Patent number: 10871662
    Abstract: An optical Mach-Zehnder superstructure modulator and method that can simultaneously linearize in-phase and quadrature components of optically modulated optical signals and reduce the modulated optical insertion loss (MOIL) by in-phase addition of the in-phase and quadrature components of an amplitude and/or phase modulated optical signal using two high-speed phase modulators embedded in the optical Mach-Zehnder superstructure modulator.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: December 22, 2020
    Assignee: II-VI Delaware, Inc.
    Inventors: Suhas P. Bhandare, Daniel Mahgerefteh
  • Patent number: 10855795
    Abstract: In one embodiment, an apparatus comprises a transmitter for communicating with a client, a receiver, and a controller coupled with the transmitter and receiver, wherein the controller is operable to receive a proxy from the client for traffic from a source and transmit a join to the source on behalf of the client.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: December 1, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventor: Tak Ming Francis Pang
  • Patent number: 10833773
    Abstract: Methods and systems for waveguide delay based equalization with optical splitting in optical communication may include an optoelectronic circuit comprising an input waveguide, a directional coupler, an optical delay, photodetectors, a current mirror, and a transimpedance amplifier. The optoelectronic circuit may receive an input optical signal via the input waveguide, split the input optical signal into first and second output signals using the directional coupler, delay the first output signal using the optical delay, convert the delayed first output signal to a first electrical signal using a first photodetector, convert the second output signal to a second electrical signal using a second photodetector, amplify the second electrical signal using the current mirror, and sum the first and second electrical signals at inputs of the transimpedance amplifier to generate an output voltage.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 10, 2020
    Assignee: Luxtera, LLC
    Inventors: Simon Pang, Joseph Balardeta
  • Patent number: 10826771
    Abstract: Techniques for system self-assessment using a state identity vector are described. In one embodiment, a method includes obtaining a policy that includes a combination of a plurality of features and a set of desired values for the features. The method also includes comparing the policy to a device fingerprint for a network device and determining compliance with the policy based on the comparison between the device fingerprint and the combination of features. The device fingerprint comprises a multi-bit word having a plurality of positions, with each position representing a feature associated with the network device. Upon determining that the network device is not in compliance with one or more features included in the combination of features of the policy, the method includes implementing a responsive action by the network device according to a schema that defines instructions for each feature represented by the plurality of positions in the device fingerprint.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 3, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: John W. Garrett, Jr., Brett Dunstan, Jeffrey Owen Apcar
  • Patent number: 10812182
    Abstract: An optical signal measurement method includes: measuring a power pi of a first optical signal on a target frequency band at a moment Ti, and measuring a power qi of a second optical signal on the target frequency band at a moment Ti+?t, where the first optical signal is a signal detected in an optical signal transmission source, the second optical signal is a signal detected on a to-be-measured node, and ?t is a transmission duration of transmitting an optical signal from the optical signal transmission source to the to-be-measured node. The method further includes determining an optical signal-to-noise ratio on the to-be-measured node based on a power array P=[p1, pN] of the first optical signal on the target frequency band and a power array Q=[q1, qN] of the second optical signal on the target frequency band.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: October 20, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Dawei Wang
  • Patent number: 10790906
    Abstract: A data center network node (28) comprises one or more switch (18,19,22,23) configured to link an optical transceiver (16,17) to an optical connection comprising a multi-core optical fiber (30) having a plurality of cores (31). For each core (31), the one or more switch (18,19,22,23) is configurable between a first configuration in which an optical signal on a said core (31) of the multi-core optical fiber bypasses the optical transceiver and a second configuration in which the optical transceiver is optically linked to the said core (31) of the multi-core optical fiber (30).
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: September 29, 2020
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Luca Giorgi, Giulio Bottari, Antonio D'Errico, Francesco Giurlanda
  • Patent number: 10784651
    Abstract: An apparatus for measuring an input signal, the apparatus comprising: a first light source configured to output a sequence of pulses of light, wherein there is a random relationship between the phase of the pulses; a beam splitter having first and second inputs and first and second outputs, said first input being arranged to receive light pulses from said first light source and the second input being arranged to receive said input signal; a differencing circuit adapted to subtract signals obtained from the first and second outputs from each other; and output a value; and a processing circuit adapted to estimate the minimum entropy of said input signal, from the output of the differencing circuit corresponding to a sequence of said light pulses from the first light source.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: September 22, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Davide Marangon, Zhiliang Yuan, Marco Lucamarini, Andrew James Shields
  • 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: 10750259
    Abstract: It is difficult to improve the usage efficiency of an optical communication network due to the passband narrowing effect in a wavelength selection process in an optical communication network using a wavelength division multiplexing system; therefore, an optical network management apparatus according to an exemplary aspect of the present invention includes wavelength selection information generating means for generating wavelength selection information on a wavelength selection process through which an optical path accommodating an information signal goes, with respect to each optical path; and wavelength selection information notifying means for notifying an optical node device through which the optical path goes of the wavelength selection information.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: August 18, 2020
    Assignee: NEC CORPORATION
    Inventors: Hitoshi Takeshita, Shinsuke Fujisawa, Tomoyuki Hino, Akio Tajima
  • Patent number: 10735305
    Abstract: This invention proposes a new communication locality oriented high-radix (CLHR) network. In this hierarchical architecture, the lowest level includes routers or servers, called level-0; the upper level is composed by groups of routers or servers, called level-1; for the highest level, a number of level-(l?1) groups establish level-1 group. A new deadlock-free adaptive routing algorithm is proposed for the CLHR network. On the one hand, the proposed minus-first routing (MFR) algorithm or plus-first routing algorithm, that implements deadlock-free partially-adaptive routing without any virtual channel, can guarantee the number of communication hops between two nodes is no more than five. On the other hand, this invention presents the fully adaptive routing algorithm that uses MFR algorithm as the baseline routing using a new flow control scheme. The CLHR network and the new routing algorithm effectively improve the performance, save energy, improve the ability for separation, and resist disturbance.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: August 4, 2020
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Dong Xiang, Yuan Cai, Xiaowen Huang
  • Patent number: 10693565
    Abstract: Methods and apparatuses are provided that compensate for the polarization dependent loss (PDL) of fiber-optic quantum channels. Compensation is accomplished by inserting a compensating PDL into another quantum channel carrying entangled photons that are entangled with photons in the first channel having losses that are to be compensated for. By selecting the optimum magnitude and orientation for the compensating PDL, compensation for the PDL in the first channel is maximized.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: June 23, 2020
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Brian T. Kirby, Daniel E. Jones, Michael Brodsky
  • Patent number: 10678002
    Abstract: Aspects and techniques of the present disclosure relate to a fiber optic communications network that includes a loop back connector in conjunction with one or more distribution devices daisy chained together to index optical fibers within the network. The network includes a central office that sends signals in one direction. The loop back connector can be mounted at the end of the chain to allow un-used live indexing optical fibers corresponding to active fiber positions to be looped back to feed signals to dead indexing optical fibers corresponding to inactive fiber positions. The dead indexing optical fibers can be optically connected to progressively dropped fibers or reverse ports in the indexed network.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: June 9, 2020
    Assignee: CommScope Technologies LLC
    Inventors: Thomas Marcouiller, Erik J. Gronvall, Thomas A. Thigpen
  • Patent number: 10674382
    Abstract: Adaptation of a network is disclosed. A proposed adaptation, determined by a sub-network component of the network based on an intended effect to the sub-network, can be received by a network-level arbitration component. The network-level arbitration component can determine if the proposed adaptation satisfies a rule based on predicted results on the network from implementing the proposed adaptation. Where the rule is satisfied the adaptation can be implemented. A result of the implementation can be compared to the predicted results to determine if the network should be reverted to a pre-implementation state. In an aspect, the network-level arbitration component can be a core-network component. In an embodiment, the network-level arbitration component can be a virtualized component on a network provider server, a cloud server, etc.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: June 2, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Jesse Chan, David Kinsey
  • Patent number: 10666359
    Abstract: A software-defined network multi-layer controller (SDN-MLC) may communicate with multiple layers of a telecommunication network. The SDN-MLC may have an optimization algorithm that helps manage, in near real-time, the multiple layers of the telecommunication network.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 26, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Gagan Choudhury, Kathleen Meier-Hellstern, Alvin Goddard, Narayan Padi, Simon Tse
  • Patent number: 10666364
    Abstract: An optical-electrical interface device for coupling to an optical distribution network is provided which comprises: a housing, an optical fiber port for coupling to a single optical fiber, an optical network terminal unit connected to the optical fiber port, a power sourcing management unit configured to manage the power supply of the optical network, network terminal unit, a plurality of electrical ports and a plurality of electrical cables each connected to the power sourcing management unit and to one of the electrical ports. The electrical ports are accessible and/or arranged outside the housing, wherein the optical-electrical interface device is configured to reverse-feed electrical power, from external electrical module devices connected to the electrical ports, for operating the optical network terminal unit which is arranged inside the housing.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: May 26, 2020
    Assignee: Corning Optical Communications LLC
    Inventors: Roni Aharon Shurki, Martin Spreemann
  • Patent number: 10608746
    Abstract: A digital instruction is generated regarding one or more electrical-to-optical conversion impairments induced at the transmitter of an optical communication system. The digital instruction may be used by the transmitter to reduce the impairments. Alternatively, or additionally, the digital instruction may be used by the receiver of the optical communication system to compensate for the impairments.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: March 31, 2020
    Assignee: Ciena Corporation
    Inventors: Qunbi Zhuge, Kevin Farley, Kim B. Roberts, Maurice O'Sullivan
  • Patent number: 10602386
    Abstract: In a method for measuring a service transmission status of a user equipment provided in an embodiment of the present invention, a first service station transmits a first data packet for a user equipment; the first service station determines at least one second service station that transmits a second data packet for the user equipment; and the first service station instructs the at least one second service station to measure a service transmission status of the user equipment, where the first data packet and the second data packet are different data packets of a same service of the user equipment or data packets of different services. According to this method, a service transmission status of a user equipment can be measured in a multi-station transmission scenario.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: March 24, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bingzhao Li, Yanyan Chen, Xiaodong Yang
  • Patent number: 10594667
    Abstract: A method, system, and recording medium for communication comparison including encrypting a first communication and a second communication, determining a list of frequencies and intensities based on the first communication and the second communication, projecting light based on the list of frequencies and intensities of the first communication onto an object, reading the frequencies and intensities of the light based on the first communication from the object, and comparing the light read in the reading with the list of frequencies and intensities of the second communication to calculate a semantic overlap between the frequencies and intensities of the first communication and the second communication.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: March 17, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Nicholas Stephen Kersting
  • Patent number: 10461968
    Abstract: A jones matrix is obtained using coefficients of an equalizer; a parameter of the jones matrix is obtained; a coefficient of an X axis polarization state or a Y axis polarization state in the coefficients is adjusted using the parameter of the jones matrix when the coefficients have singularity characteristics, or energy corresponding to each coefficient of X or Y axis polarization state under each order of a filter in the equalizer is determined using two coefficients of an X or Y axis polarization state in the equalizer coefficients; and a central position of a coefficient tap of X or Y axis polarization state of the equalizer is adjusted using the energy corresponding to each coefficient of X or Y axis polarization state under each order of the filter when the coefficient tap of the X axis or Y axis polarization state of the equalizer deviates from the central position.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: October 29, 2019
    Assignee: Sanechips Technology Co., Ltd.
    Inventors: Yaling Zhao, Junfeng Peng, Huihui Wan
  • Patent number: 10438404
    Abstract: Embodiments herein describe an AR system which communicates with light sources in a real world environment to simulate the light sources having an effect on AR content being displayed in the AR system. In one embodiment, the AR system determines the light characteristics of the light sources such as their color, specularity, beam spread, brightness, or illumination pattern. These light characteristics can contribute to the ambient light in the real world environment which affects the appearance of the physical objects in the environment. The AR system can adjust how the AR content is displayed to simulate the AR content being affected in a similar manner by the light sources. As such, the AR content appears to be more like a physical object (rather than a virtual object) thereby providing the user with a more immersive experience.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 8, 2019
    Assignee: Disney Enterprises, Inc.
    Inventor: Robert Scott Trowbridge
  • Patent number: 10374711
    Abstract: A communications system, a method for managing a communications system, and a controller, where the communications system includes a front-end device and a remote device, where the remote device includes at least one coaxial media converter (CMC), where each CMC includes a data over cable service interface specification (DOCSIS) processor supporting a broadband access service and an edge quadrature amplitude modulation (EQAM) processor supporting a video service, and the at least one CMC and the front-end device are connected using a digital fiber, and the front-end device includes a controller, where the controller is configured to manage the at least one CMC.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: August 6, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Bo Ke, Guangsheng Wu
  • Patent number: 10348369
    Abstract: A transmission control device includes an acquiring unit that acquires propagation delay time for each propagation path between a plurality of terminal devices and a plurality of transmitter stations; a selector that selects, based on the propagation delay time acquired by the acquiring unit, combinations of terminal devices having similar propagation delay differences from the plurality of the transmitter stations; and a controller that controls transmission timing of the plurality of the transmitter stations that transmit signals to the combinations of the terminal devices selected by the selector.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Takashi Dateki, Takashi Seyama, Takaharu Kobayashi
  • Patent number: 10345673
    Abstract: Embodiments of this disclosure provide a bias control apparatus and method of a modulator of an optical transmitter and an optical transmitter. By obtaining respective output power signals of a first Mach-Zehnder modulator and a second Mach-Zehnder modulator constituting the modulator of the optical transmitter, information on a phase bias may be extracted according to the two output power signals and an overall output power signal of the modulator of the optical transmitter, so as to control the phase bias by using the information, thereby efficiently improving a sensitivity of the control of the bias, and being applicable to various types of modulation formats.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Yangyang Fan, Zhenning Tao
  • Patent number: 10341018
    Abstract: Methods, systems, and devices are described for commissioning light fixtures. One method may include receiving, at a mobile device, an encoded light signal from a light fixture in a plurality of light fixtures. The encoded light signal may be decoded to obtain an identifier associated with the light fixture, and a correspondence between the identifier and a plurality of locations of the plurality of light fixtures may be determined.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: July 2, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Meghna Agrawal, Suresh Kumar Bitra