Transceiver Patents (Class 398/22)
  • Patent number: 9900791
    Abstract: A monitoring device which enables a user to address a failure before said failure occurs, a radio communication system, a failure prediction method and a non-temporary computer-readable medium in which a program is stored are provided. This monitoring device is provided with an acquisition unit and a prediction unit. The acquisition unit acquires history data which is generated in one or more radio communication devices and which indicates at least the time at which a received signal level falls below a preset threshold level in each preset time period. The prediction unit predicts, based on the history data, the possibility of a failure occurring in the radio communication device.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC Corporation
    Inventor: Yoshinori Kitahara
  • Patent number: 9543463
    Abstract: An optical through silicon via is formed in a silicon substrate of an integrated circuit. A photo detector is formed within the integrated circuit and is optically coupled to a first side of the optical through silicon via. A light generating source optically coupled to a second side of the optical through silicon via is provided. The photo detector is configured to receive a light, generated by the light generating source, propagating through the optical through silicon via. The light, generated by the light generating source, is controlled by a signal generated by a signal generating source.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: January 10, 2017
    Assignee: International Business Machines Corporation
    Inventors: Effendi Leobandung, James D. Warnock, Dieter Wendel
  • Patent number: 9287989
    Abstract: Proposed is an optical data transmission device for an optical access network that comprises a laser transmission unit, which generates an optical transmission signal, and a driving unit, which controls the laser transmission unit for modulating the transmission signal. The device comprises an optical reception unit that converts the received optical signal into an electrical measurement signal. For this, the reception unit contains a photo-diode and an electrical amplifier. The optical reception unit is separate from the laser transmission unit. A control unit controls the laser transmission unit, such that the optical transmission signal is modulated in dependence on a measurement signal. The control unit measures multiple electrical measurement signals during a measurement interval and determines an averaged received electrical measurement signal.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: March 15, 2016
    Assignee: Alcatel Lucent
    Inventors: Michael Straub, Joerg Hehmann, Rudi Vankeirsbilck, Stijn Meersman, Yannick Clybouw
  • Patent number: 9130673
    Abstract: The invention relates to a system for the certification of a passive optical network and for the detection of problems and faults in the last fibre legs, which is suitable for use in passive optical networks which, between the OLT device housed in a telephone central office and the user device of ONT, includes optical dividers or splitters which, in the downward direction, distribute the optical signal to all of the users within a tree-and-branch architecture, and in the upward direction, combine the optical signals from all of the ONTs. The system is based on the incorporation of a group of devices known as an OLT emulator and a remote testing unit which are joined to the corresponding wall socket of the telephone central office and user, such that the remote testing unit is positioned facing an OLT in operation, allowing the certification of the last leg of the optical network and the detection of problems and faults in a PON network in operation.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: September 8, 2015
    Assignee: TELNET REDES INTELIGENTES, S.A.
    Inventors: Francisco Javier Cortés Santaolalla, Gonzalo Pedro Rodrigo Álvarez, Octavio Benedí Sánchez, Héctor Fernández Gracia, Adrián Pérez Resa, Amador Pozo Espinosa, Carlos Vicastillo Barrabés
  • Patent number: 9094128
    Abstract: A scheme is described for remote control of the output power of a transmitter in a smart SFP (or SFP+, or XFP) duplex (or BiDi, or SWBiDi) transceiver in a communication system using an operating system with OAM and PP functions, an OAM, PP & Payload Processor, a transceiver, an optical power meter (optional), a BERT, and an optical link in the field.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: July 28, 2015
    Assignee: Optoelectronics Solutions Co., Ltd.
    Inventors: Kwang Soo Park, Moon Soo Park, Christian Hoede, Jan A. W. Venema
  • Patent number: 9025951
    Abstract: In general, techniques are described for provisioning network devices in an Ethernet-based access network. For example, an access node located in an Ethernet-based access network positioned intermediate to a back office network and a customer network may implement the techniques. The access node comprises a control unit that discovers a demarcation point device that terminates the access network of the service provider network at the customer network. The control unit of the access node implements an Ethernet protocol to provide layer two network connectivity between the service provider network and the customer network, authenticates the demarcation point device based on a unique identifier assigned to the demarcation point device and, after successfully authenticating the demarcation point device, provisions the demarcation point device.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: May 5, 2015
    Assignee: Calix, Inc.
    Inventors: Berkay Baykal, Shaun N. Missett
  • Patent number: 9007228
    Abstract: An Ethernet-based transmission system using a dying gasp according to the present invention includes an SMPS for supplying power to an Ethernet-based lower level system, detecting a state of a power fault, and outputting a dying gasp alarm signal. A CPU receives the dying gasp alarm signal, and generates and transmits an alarm packet. A PHY chip receives the alarm packet, and uplinks the alarm packet so that the alarm packet is transferred to a higher level stage. An L3 switch receives the alarm packet and determines whether a power fault has occurred in the lower level system. Accordingly, the present invention applies a dying gasp to an Ethernet-based or EPON-based transmission system and is then capable of generating and transmitting an alarm packet so that when a power fault occurs, a device in a higher level network can rapidly determine the occurrence of the power fault.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: April 14, 2015
    Assignee: UBIQUOSS Inc.
    Inventors: Dong Il Song, Min-kyu Cho
  • Patent number: 8995828
    Abstract: An optical transmission device includes an extractor that extracts respective optical signals from optical signals multiplexed from a plurality of optical signals of different wavelengths, a detector that detects wavelengths of the extracted respective optical signals, a storage that stores the wavelengths of the detected respective optical signals, and a processor that is operative to derive trends in wavelength variation of the respective optical signals based on the detected respective optical signals and the respective optical signals stored in the storage, and determines that either one or both of the extractor and the detector cause the wavelengths to be varied when the trends in wavelength variation of two or more wavelengths are the same.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: March 31, 2015
    Assignee: Fujitsu Limited
    Inventors: Yuichi Suzuki, Toshihiro Ohtani
  • Patent number: 8989587
    Abstract: Methods, algorithms, architectures, circuits, and/or systems for determining the status of parameters associated with optical transceiver operation are disclosed. The method can include (a) accessing and/or monitoring parametric data for each of a plurality of parameters that are related to operation of the optical transceiver; (b) storing the parametric data in one or more memories; (c) comparing the parametric data for each of the plurality of parameters against at least one of a corresponding plurality of predetermined thresholds; and (d) generating one or more states indicating whether the parametric data for a unique one of the parameters has crossed one or more of the corresponding plurality of predetermined thresholds. The invention also relates to an optical triplexer, comprising the described optical transceiver.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 24, 2015
    Assignee: Source Photonics, Inc.
    Inventors: Todd Rope, Mark Heimbuch
  • Patent number: 8965200
    Abstract: A method, an apparatus and a system for detecting a connection status of an optical fiber jumper are provided in the embodiments of the present invention. The method for detecting a connection status of an optical fiber jumper includes: judging a connection status of a second port and a first port according to whether an optical signal sent by the first port to the second port through a first optical fiber is received, wherein the first optical fiber is connected to two ends of an optical fiber jumper, and the two ends of the optical fiber jumper are connected to the first port and the second port respectively; and obtaining a port identification corresponding to the first port according to the optical signal if the optical signal is received.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: February 24, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunsheng Wen, Jun Zhao, Bo Wang, Xiaolei Shan
  • Patent number: 8963573
    Abstract: According to an example implementation, a universal tester includes a host interface slot connected to a first pluggable host card during an electrical test mode of operation to provide a stressed electrical signal to a host under test. The host interface slot is connected to a second pluggable host card during an optical test mode of operation, the second pluggable host card including an electrical-optical conversion block to convert a stressed electrical signal to a stressed optical signal that is provided to a host under test. A stressor generator may operation in pass-through mode or a loop-back mode.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: February 24, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: D. Brice Achkir, Marco Mazzini, Stefano Riboldi, Cristiana Muzio
  • Patent number: 8942556
    Abstract: An optical transceiver having an integrated optical time domain reflectometer monitoring unit and methods for using the same are disclosed. The disclosure relates to an optical transceiver comprising an optical device comprising a wavelength division multiplexing system (WDM), a data signal driver, a data signal limiting amplifier, and an optical time domain reflectometer (OTDR) data processing module. Furthermore, the optical transceiver is particularly advantageous in an optical line terminal (OLT) and/or a passive optical network (PON). The integrated OTDR data processing module can protect the optical transceiver, ensure successful monitoring data, simplify network wiring and decrease system and network costs by decreasing the number of OTDR modules and WDM units.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: January 27, 2015
    Assignee: Source Photonics, Inc.
    Inventors: Fuqiang Zhao, Yi Yang, Yong Lu
  • Patent number: 8934779
    Abstract: Methods, architectures, circuits, and/or systems for monitoring operating parameters and/or generating status indications associated with electronic device operation are disclosed. The method can include (i) monitoring a first operating parameter related to operation of the electronic device to determine a first parameter value, (ii) calculating a difference between the first parameter value and a predetermined value for the first operating parameter, (iii) monitoring a second operating parameter on which thresholds for operational warnings and/or alarms are based to determine a second parameter value, (iv) updating or changing the thresholds based on a predetermined change or event in the second parameter value, (v) comparing the difference to the updated or changed thresholds, and (vi) generating a corresponding one of the operational warnings and/or alarms when the difference crosses at least one of the thresholds in a predetermined direction.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: January 13, 2015
    Assignee: Source Photonics, Inc.
    Inventors: Todd Rope, Mark Heimbuch
  • Patent number: 8891956
    Abstract: In accordance with embodiments of the present disclosure, a method may include for each particular working demand in a communication network, calculating a dedicated backup path for a working path of the particular working demand such that each particular backup path does not include links present in the working path. The method may also include, for each particular working demand: (i) assigning to the backup path a wavelength associated with the particular working demand; and (ii) assign to the backup path a transponder at each of the source and destination of the backup path associated with the wavelength; such that the backup path for at least one particular working demand is assigned a transponder that is also assigned to the backup path for at least one other particular working demand.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: November 18, 2014
    Assignee: Fujitsu Limited
    Inventors: Xi Wang, Paparao Palacharla
  • Publication number: 20140334812
    Abstract: A wavelength multiplexing optical communication device includes: a pluggable LD module that generates a check optical signal having a specific wavelength; a multiplexer that multiplexes the check optical signal onto the transmitting-side optical fiber which links the transmitting-side connector with a corresponding output port of the optical demultiplexer, the transmitting-side connector being connected to the in-device optical fiber; a demultiplexer that demultiplexer the check optical signal from a receiving-side optical fiber which links the receiving-side connector with a corresponding input port of the optical multiplexer, the receiving-side connector being connected to the in-device optical fiber; a level detector that detects a level of the check optical signal obtained by the demultiplexer; and an erroneous connection detector that detects an erroneous connection of the in-device optical fiber in accordance with the detected level.
    Type: Application
    Filed: January 10, 2013
    Publication date: November 13, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yuita Noguchi
  • Patent number: 8886033
    Abstract: An optical transceiver and methods for using the same are disclosed. The optical transceiver and methods may be useful for providing more accurate information regarding trends in operation of the optical transceiver, predicting an impending failure of the optical transceiver, and providing details of the optical transceiver prior to failure. The optical transceiver generally includes (1) at least one of (i) a receiver configured to receive optical information and (ii) a transmitter configured to transmit optical information, (2) circuitry configured to sample data for one or more operational parameters of the receiver and/or transmitter, (3) logic configured to perform one or more statistical calculations on the sampled data to generate statistical information, and (iv) one or more memories configured to store the sampled data and the statistical information.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: November 11, 2014
    Assignee: Source Photonics, Inc.
    Inventor: Mohammad Azadeh
  • Patent number: 8873946
    Abstract: A system and method is disclosed that allows for the monitoring, analyzing and reporting on performance, availability and quality of optical network paths. The correlation of PM parameter metrics to client connections, coupled with threshold-based alarm generation provides a proactive and predictive management, reporting and analyzing of the health and effectiveness of individual path connections to alert Operational Support (OS) staff and/or customers to signal degradation and impending Network Element (NE) failures. The system and method performs in real-time processing intervals required for alarm surveillance in a telecommunications network.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: October 28, 2014
    Assignee: AT&T Intellectual Property II, L.P
    Inventors: David Mayo, Meei-Ling Chen
  • Patent number: 8861969
    Abstract: A laser source is configured for all-optical AM-FM up-conversion. In one exemplary embodiment, an amplitude modulated (AM) optical input signal containing a baseband signal at a sub-microwave frequency, is injected into the laser source. The amplitude of the AM optical input signal and the optical carrier frequency are adjusted so as to place the laser source in a period-one dynamical state characterized by a transitioning of the laser source from a free-running optical frequency to at least two optical frequencies having a separation distance equal to a period-one microwave frequency. As a result of the period-one dynamical state, a frequency modulated (FM) optical output signal containing the baseband signal carried at the period-one microwave frequency, is propagated out of the laser source. The period-one microwave frequency is operative as a sub-carrier signal.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: October 14, 2014
    Assignee: The Regents of the University of California
    Inventors: Sze-Chun Chan, Sheng-Kwang Hwang, Jia-Ming Liu
  • Patent number: 8842983
    Abstract: A data transmission system and method are provided. The data transmission system includes a first link partner and an optical transceiver unit. The first link partner includes a controller. When the first link partner is in an abnormal operation mode, the controller controls the first link partner to exit from the abnormal operation mode. The optical transceiver unit is coupled between the first link partner and a second link partner and performs data transmission between the first link partner and the second link partner. According to the data transmission system and method, one link partner can accurately detect whether another link partner is coupled to the one link partner through an optical transceiver unit. Accordingly, data transmission between the two link partners can be stably performed through the optical transceiver unit.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: September 23, 2014
    Assignee: Via Technologies, Inc.
    Inventors: Jinkuan Tang, Jiin Lai, Hao-Hsuan Chiu
  • Patent number: 8842993
    Abstract: Methods, algorithms, architectures, circuits, and/or systems for determining the status of parameters associated with optical transceiver operation are disclosed. The optical transceiver can include an optical receiver to receive optical data; an optical transmitter to transmit optical data; one or more memories to store data (and, optionally, thresholds) for each of a plurality of parameters that are related to operation of at least one of the optical receiver and the optical transmitter; a microprocessor that compares the parametric data against the threshold(s) to calculate one or more flags to indicate whether a corresponding parameter has exceeded the first or second threshold; and an interface that receives a flag request from a host, and provides the one or more flags in response to the request. In the present disclosure, the microprocessor may calculate the one or more flags only in response to the flag request from the host.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: September 23, 2014
    Assignee: Source Photonics, Inc.
    Inventor: Todd Rope
  • Patent number: 8824902
    Abstract: An optical receiver includes: an optical to electric converter that converts a received optical signal into an analog electric signal; an analog to digital converter that converts the analog electric signal obtained by the optical to electric converter into a digital signal; a digital signal processor that performs wave shaping on the digital signal; an information extract circuit that extracts information related to loss or deterioration of the optical signal from a signal propagating from the analog to digital converter to the digital signal processor or a signal in the digital signal processor; and a judging circuit that judges, based on the information extracted by the information extract circuit, whether the optical signal is lost or deteriorates.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Fujitsu Limited
    Inventors: Takeshi Sakamoto, Kosuke Komaki
  • Patent number: 8798458
    Abstract: Exemplary systems, devices, and methods for evaluating a link status of a fiber-optic communication system are disclosed. An exemplary transceiver device includes a transmitter configured to transmit an optical signal having a first wavelength to an additional transceiver device by way of a single optical fiber, a receiver configured to receive an optical signal having a second wavelength from the additional transceiver device by way of the single optical fiber, and a link status facility communicatively coupled to the transmitter and the receiver and configured to provide one or more visual indications of a link status between the transceiver device and the additional transceiver device. Corresponding systems, devices, and methods are also disclosed.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: August 5, 2014
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Nee Ben Gee, Glenn A. Wellbrock, Tiejun J. Xia
  • Patent number: 8787752
    Abstract: The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: July 22, 2014
    Assignee: California Institute of Technology
    Inventors: Axel Scherer, Aditya Rajagopal, Seheon Kim, Andrew P. Homyk
  • Patent number: 8781332
    Abstract: An optical transceiver module adapted to a link device includes a connection unit, a driving unit and optical transmitting and receiving units. The connection unit, to be coupled with the link device, includes an indicating element for generating an indicating signal when the connection unit is coupled with the link device. The driving unit, coupled with the connection unit, receives the indicating signal and outputs a control signal according to the indicating signal. The optical transmitting unit, coupled with the driving unit, receives the control signal for driving the optical transmitting unit to output a first optical signal. The optical receiving unit, coupled with the driving unit, transmits a received second optical signal to the driving unit. An optical transmission device using the optical transceiver module, and an optical transmission method are also disclosed. A link training sequence can be initiated after the connection unit is actually coupled with the link device.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: July 15, 2014
    Assignee: Via Technologies, Inc.
    Inventors: Jin-Kuan Tang, Jiin Lai
  • Patent number: 8718465
    Abstract: N optical transceivers are each connected to a respective electronic module in one-to-one relation such that a respective one electronic module controls a respective one optical transceiver. An electronic switch matrix provides cross-connect capability between the P redundant electronic modules and N electronic modules to the N optical transceivers. A system controller determines when an active N electronic module has failed, and configures the electronic switch matrix to switch a P redundant electronic module into the optical transceiver to which the failed electronic module was connected. A system switch module redirects traffic and routing information, under the direction of the system controller, from the failed module to the newly activated redundant module so that the redundant module assumes the functionality of the failed module.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: May 6, 2014
    Assignee: Adtran, Inc.
    Inventors: Vahid Sahebekhtiari, Leif J. Sandstrom
  • Patent number: 8705973
    Abstract: A mechanism for an optical transceiver to log information about its operational parameters to an off transceiver host computing system (hereinafter referred to simply as a “host”). The optical transceiver may be communicatively coupled to the host. The optical transceiver is configured to identify operational information regarding itself. The operational information may include statistical data about operation, or may include measured parameters. The optical transceiver may log the information to the memory of the host in an off transceiver logging operation.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: April 22, 2014
    Assignee: Finisar Corporation
    Inventors: Luke M. Ekkisogloy, Gerald L. Dybsetter, Jayne C. Hahin
  • Patent number: 8699872
    Abstract: An optical communications system includes a MSAP and an optical transceiver mounted at the MSAP that communicates over an optical network to at least one optical network terminal (ONT). A first electronic module is operatively connected to the optical transceiver and configured to control the optical transceiver and mounted at the MSAP separate from the optical transceiver. A redundant second electronic module is supported within the MSAP and mounted separate from the optical transceiver. A Mux/Demux module interconnects and supports the first and second electronic modules to form an integral unit and mounted at the MSAP separate from the optical transceiver. The Mux/Demux module is configured to switch the second electronic module into communication with the optical transceiver upon failure of the first electronic module.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: April 15, 2014
    Assignee: Adtran, Inc.
    Inventors: Vahid Sahebekhtiari, Leif J. Sandstrom
  • Patent number: 8693865
    Abstract: A data processing device is connectable to a communication network and operable to receive data associated with an attenuation characteristic of a transmission line of a cable in a cable communication subsystem, the subsystem comprising a transmitter and/or receiver coupled to the cable. The data processing device is responsive to the received data to initiate a security procedure.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: April 8, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Jerry Aguren
  • Patent number: 8675501
    Abstract: A transmission apparatus includes a processor that is operative to terminate a first line performing a communication using a digital wrapper, to terminate a signal on a second line performing a communication using Gigabit Ethernet, to apply a transparent transcoding process to a terminated signal and the signal received from the second line and to output these signals; and wherein when a fault occurs in a communication performed through the first line and when there is no response for a predetermined time period after an auto negotiation restart signal is reported to an opposite apparatus on a second line side, to report information indicating an occurrence of the fault to the opposite apparatus by using a signal of a MAC (Media Access Control) frame format.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: March 18, 2014
    Assignee: Fujitsu Limited
    Inventors: Tetsuya Uchida, Takashi Kuwabara
  • Patent number: 8670663
    Abstract: Methods, systems, and computer-readable media provide for notifying an optical line termination (OLT) of a power failure. According to embodiments, a method for notifying an OLT of a power failure is provided. According to the method, a notification of a power failure at an optical network termination (ONT) is received. In response to receiving the notification, power is retrieved from a dedicated power storage unit dedicated to providing power for the transmission of a dying gasp alarm. The dying gasp alarm is transmitted to the OLT utilizing at least a portion of the power from the dedicated power storage unit. The dying gasp alarm notifies the OLT of the power failure.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 11, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Glenn Mark Mahony, Mounire El Houmaidi
  • Patent number: 8670673
    Abstract: The invention relates to a method of operating an optical transmission system (100a, 100b, 100c), wherein at least one optical data signal is transmitted over an optical transmission link (120), which particularly comprises at least one optical fiber (120a). The inventive method is characterized by modulating (200) said data signal with a test signal (s) having a predetermined modulation frequency fmod to obtain a modulated data signal (Pin), by receiving (210) a reflected portion (Pback) of said modulated data signal (Pin), and by determining (220) a fiber quality measure (a) depending on said received reflected portion (Pback) of said modulated signal (Pin).
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: March 11, 2014
    Assignee: ADVA AG Optical Networking
    Inventor: Michael Eiselt
  • Patent number: 8666255
    Abstract: An optical and/or optoelectrical transceiver and system are disclosed that enable parallel transmission of data and management signals via an optical fiber without affecting data signal transmissions transmitted on the optical fiber. Furthermore, the present transceiver and system provide a fault diagnosis function for an optical fiber link. The transceiver and system generally comprise an interface, an intersecting transmission management unit, a driver, a management signal driving unit, an optical transmitter, an optical receiver, an amplifier, a management signal recovery unit, a management unit, and optionally, a power supply unit.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: March 4, 2014
    Assignee: Source Photonics, Inc.
    Inventors: Yuanjun Huang, Jianhua Zhou, Yaxi Xiong, Shengzhong Zhang
  • Patent number: 8660424
    Abstract: A scalable signal processing test device and related signal processing techniques are provided herein for processing signals at a signal processing module of the scalable signal processing test device. Source electrical signals are processed to generate test electrical signals that model electrical signals produced by an optical module from received optical signals in accordance with a high speed optical standard for optical transmission. The test electrical signals are transmitted over transmit links to a host device that is configured to receive the test electrical signals in a format that would normally be produced by an optical module in accordance with the high speed optical standard. The test electrical signals are received after they have been looped back from the host device over receive links from the host device.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: February 25, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: D. Brice Achkir, Hugh Barrass
  • Patent number: 8655168
    Abstract: The present disclosure relates to a passive optical network (PON) and provides a method for maintaining the PON, the optical network unit (ONU), and the optical line terminal (OLT) to solve the problem of the ONU being in a constant light emitting state. The method of the present disclosure allows the OLT to determine whether the continuous seizure time of an upstream channel exceeds the preset threshold, and if so, detect the failed ONU that continuously seizes the upstream channel and use a control message or control signal to instruct the failed ONU to turn off power supply to its transmitting circuit.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: February 18, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Yinghua Dong
  • Patent number: 8649684
    Abstract: Optical fiber-based wireless systems and related components and methods are disclosed. The systems support radio frequency (RF) communications with clients over optical fiber, including Radio-over-Fiber (RoF) communications. The systems may be provided as part of an indoor distributed antenna system (IDAS) to provide wireless communication services to clients inside a building or other facility. The communications can be distributed between a head end unit (HEU) that receives carrier signals from one or more service or carrier providers and converts the signals to RoF signals for distribution over optical fibers to end points, which may be remote antenna units (RAUs). A microprocessor-based control system or systems may also be employed.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 11, 2014
    Assignee: Corning Cable Systems LLC
    Inventors: Raymond A. Casterline, Gary L. Coakley, Vladimir M. Cotfas, Eric M. Sadowski, Michael Sauer, Dale A. Webb, Steven C. Kapp, Rajeshkannan Palanisamy, David R. Peters, Michael B. Webb
  • Patent number: 8625984
    Abstract: A transmission device includes a transponder including an oscillator configured to oscillate a local optical laser, a wavelength controller configured to control an oscillation wavelength of the local optical laser to receive desired input signal light, and a coherent receiver configured to combine and detect the local optical laser and input signal light. A controller is configured to control the oscillation wavelength using a wavelength of the input signal light detected by the coherent receiver, to determine an erroneous connection of a signal line related to the input signal light, when the wavelength of the input signal light is not an expected wavelength.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: January 7, 2014
    Assignee: Fujitsu Limited
    Inventors: Yoshinobu Matsukawa, Yuya Ishida
  • Patent number: 8559813
    Abstract: A time-domain (TD) reflectometer that is designed to operate based on probe and response signals that are substantially fully spectrally confined to a designated frequency passband. In one embodiment, the TD reflectometer uses a passband transmitter to generate the probe signal based on a pseudo-random bit sequence and a passband receiver to demodulate the response signal. The TD reflectometer determines the impulse response of a channel under test based on cross-correlation of the transmitter and receiver baseband signals. In various embodiments, the TD reflectometer can be designed to operate in an acoustic-frequency range, a radio-frequency range, or an optical-frequency range. Due to its passband configuration, the TD reflectometer is advantageously capable of determining impulse responses without disrupting the operation and/or interfering with normal functions of the tested channel.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 15, 2013
    Assignee: Alcatel Lucent
    Inventor: Dale D. Harman
  • Patent number: 8554072
    Abstract: An optical transceiver is disclosed in which the optical output thereof is controlled without degrading the signal quality. The optical transceiver of the invention includes a plurality of transmitter units and a controller that adjusts the bias current of respective transmitter units. The controller, receiving information to decrease/increase the output of the optical transceiver, decides a unique unit that has a largest margin to increase/decrease the bias current and provides a control signal only to the unique unit to increase/decrease the bias current.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: October 8, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Hirotaka Oomori
  • Publication number: 20130251361
    Abstract: An optical transceiver and methods for using the same are disclosed. The optical transceiver and methods may be useful for providing more accurate information regarding trends in operation of the optical transceiver, predicting an impending failure of the optical transceiver, and providing details of the optical transceiver prior to failure. The optical transceiver generally includes (1) at least one of (i) a receiver configured to receive optical information and (ii) a transmitter configured to transmit optical information, (2) circuitry configured to sample data for one or more operational parameters of the receiver and/or transmitter, (3) logic configured to perform one or more statistical calculations on the sampled data to generate statistical information, and (iv) one or more memories configured to store the sampled data and the statistical information.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Inventor: Mohammad AZADEH
  • Patent number: 8532482
    Abstract: A method and apparatus for detecting Passive Optical Network (PON) failures, and a PON system are provided to obtain the monitoring information of a peer device before a PON system failure occurs. The method includes: obtaining monitoring information of an Optical Line Terminal (OLT) and an Optical Network Unit (ONU); and determining a failure of a passive ONU according to the obtained monitoring information of the OLT and the ONU. The monitoring information of the peer device is obtained before a PON system failure occurs. Thus the failure is discovered in time, quick troubleshooting is ensured, and the costs of system maintenance are reduced.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: September 10, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Sulin Yang
  • Patent number: 8532483
    Abstract: A method for diagnosing an optical communication network having a control system, an optical hub, and multiple optical network terminators. The hub communicates with all the network terminators via an inband management channel. In case one network terminator disturbs the communication from the network terminators to the hub and the communication from the hub to the network terminators is functional, the control system sends a shut-off command to one network terminator, checks if the disturbance is gone, if the disturbance is not gone, sends a pulse mode activation command to this network terminator, checks if there is a superposition signal of the disturbance signal with a pulse mode signal and marks the network terminator as bad, if the pulse signal is not superimposed.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: September 10, 2013
    Assignee: Adtran GmbH
    Inventors: Soenke Rosner, Thomas Treyer
  • Patent number: 8509624
    Abstract: In one embodiment, an apparatus comprising an optical transmitter, having an optical transmitter portion and an electrical transmitter portion, and configured to convert an electrical signal to an optical signal, and transmit the optical signal; an optical receiver, having an optical receiver portion and an electrical receiver portion, configured to receive an optical signal and convert the optical signal to an electrical signal; a passive power controller configured to passively detect whether or not a cable is coupled with the optical transmitter and, if not, to place at least the optical transmitter portion in a sleep mode.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: August 13, 2013
    Assignee: Cisco Technology, Inc.
    Inventor: Farrokh Mattahedin
  • Publication number: 20130136445
    Abstract: Performance monitoring (PM); optical layer operations, administration, maintenance, and provisioning (OAM&P); and alarming are provided in optical transceivers, such as multi-source agreement (MSA)-defined modules. The present disclosure provides an optical transceiver defined by an MSA agreement with integrated PM and alarming for carrier-grade operation. The integration preserves the existing MSA specifications allowing the optical transceiver to operate with any compliant MSA host device. Further, the host device can be configured through software to retrieve the PM and alarming from the optical transceiver. The optical transceiver can include XFP, XPAK, XENPAK, X2, XFP-E, SFP, SFP+, 300-pin, and the like. The optical transceiver is configured to frame incoming signals to provide overhead and FEC. The transceiver provides access to all alarms in ITU-T G.709, all Tandem Connection Monitoring (TCM) bytes in G.709, far end monitoring as specified in G.
    Type: Application
    Filed: January 29, 2013
    Publication date: May 30, 2013
    Applicant: Menara Networks, Inc.
    Inventors: Siraj Nour El-Ahmadi, Salam El-Ahmadi, Adam R. Hotchkiss
  • Publication number: 20130136446
    Abstract: The present disclosure provides an optical transceiver, method of mapping, and method of management utilizing a plurality of Optical Channel Transport Unit layer k (OTUk) links to form an aggregate signal, such as, for example, 10 OTU2s to provide a single 100 Gigabit Ethernet (100 GbE) signal. Specifically, the present invention enables use of existing circuitry and methods at lower speed signals, e.g. 10 G, to support higher speed aggregate signals, e.g. 100 G. The present invention may be utilized to support carrier-grade OTN applications with optical transceivers such as, for example, pluggable optical transceivers. In an exemplary embodiment, the present invention includes a method which receives a plurality of signals, frames each of the plurality of signals into an OTUk frame, and manages/monitors each of the plurality of signals in an OTUk frame in the aggregate.
    Type: Application
    Filed: January 29, 2013
    Publication date: May 30, 2013
    Applicant: Menara Networks, Inc.
    Inventors: Adam R. Hotchkiss, Siraj Nour El-Ahmadi, Salam El-Ahmadi, Gabriel E. Cardona
  • Publication number: 20130129340
    Abstract: In an embodiment, a dual optical-electrical conversion (DOEC) module is described that includes an optical host interface, an optical network interface, and an integrated circuit. The optical host interface includes an optical transmitter and an optical receiver. The optical network interface includes an optical transmitter and an optical receiver. The integrated circuit conditions electrical signals communicated between the optical host interface and optical network interface. Optical signals received at and transmitted by the optical host interface may have different parameter requirements than optical signals received at and transmitted by the optical network interface, such as such as different wavelength parameters and/or fiber link length parameters.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 23, 2013
    Applicant: FINISAR CORPORATION
    Inventor: FINISAR CORPORATION
  • Patent number: 8423850
    Abstract: A pulse transmission technique is used for wireless communication between a microcomputer (13) having a debugging support circuit (17) and a debugger (13). The pulse transmission technique is based on magnetic field coupling between a first coil (14) provided for the microcomputer and a second coil (8) coupled with the debugger. During an initialization operation, the microcomputer performs a process of configuring a communication condition of the wireless communication to perform the wireless communication. The microcomputer awaits control from the debugger when the microcomputer establishes communication with the debugger. The debugger awaits establishment of the communication and proceeds to control of the microcomputer in accordance with the wireless communication. It is possible to provide contactless interface for system debugging without the need for a large antenna or a large-scale circuit for modulation and demodulation.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: April 16, 2013
    Assignees: Renesas Electronics Corporation, Keio University
    Inventors: Shunichi Iwata, Yoichi Takahata, Toshihiko Sugahara, Yutaka Takikawa, Yoshihiro Shimizu, Hiroki Ishikuro, Tadahiro Kuroda
  • Patent number: 8396362
    Abstract: The light transmitting and receiving module includes a light outputting section; alight receiver which receives input light and which outputs an electric signal having an intensity corresponding to a light intensity of the input light; a first variably attenuation controller which variably attenuates the light output from the light outputting section; a second variably attenuation controller which variably attenuates the input light to the light receiver; a first switch which selectively switches a path through which the light from the first variably attenuation controller is output between a light transmitting path and an alternative path different from the light transmitting path; and a second switch which selectively switches light to be output to the second variably attenuation controller between light from an external entity and the light through the alternative path of the first switch.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: March 12, 2013
    Assignee: Fujitsu Limited
    Inventors: Yuichi Nagaki, Tsutomu Aiba
  • Patent number: 8332853
    Abstract: Systems and methods for optimizing the task scheduling efficiency of firmware and/or software associated with optoelectronic transceiver devices. In one example, a scheduling module executes microcode that schedules tasks based on the operational parameters. The scheduling module compares operational parameters with their last known values and then flags necessary tasks to be initiated. The scheduling module flags only those tasks that rely on a particular operational parameter and only if the operational parameter has changed in value since the most recent time that it has been measured. Specifically, the scheduling module identifies leading tasks and dependent tasks and flags tasks only if data that relies on the operating parameter has changed since a previous task scheduling determination.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: December 11, 2012
    Assignee: Finisar Corporation
    Inventor: Jun Luo
  • Patent number: 8311408
    Abstract: A method, system and computer-usable medium are disclosed for visually indicating the remaining life of a small form factor pluggable (SFP) optical transceiver module. The total number of optical light pulse signals processed by an SFP are compared to a predetermined lifecycle number of signals that can be processed before the SFP enters a failed operating state. The remaining life of the SFP is calculated. A first display visually indicates that the total number of processed signals has not exceeded the lifecycle number of signals. A second display located on the SFP enclosure visually indicates the SFP has reached the end of its lifecycle.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: November 13, 2012
    Assignee: International Business Machines Corporation
    Inventors: Tara Astigarraga, David Franklin DeHaan, Louie Arthur Dickens, Omolaoye Olatunde-Bello
  • Patent number: 8290362
    Abstract: A system and method is disclosed that allows for the monitoring, analyzing and reporting on performance, availability and quality of optical network paths. The correlation of PM parameter metrics to client connections, coupled with threshold-based alarm generation provides a proactive and predictive management, reporting and analyzing of the health and effectiveness of individual path connections to alert Operational Support (OS) staff and/or customers to signal degradation and impending Network Element (NE) failures. The system and method performs in real-time processing intervals required for alarm surveillance in a telecommunications network.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: October 16, 2012
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: David Mayo, Meei-Ling Chen