Duplex Patents (Class 398/41)
  • Patent number: 10401570
    Abstract: A wavelength selective switch includes an attenuation liquid crystal cell array and a switching liquid crystal cell array, the attenuation liquid crystal cell array is configured to select a region where a light is incident on the switching liquid crystal cell array; the switching liquid crystal cell array includes a first ECB liquid crystal cell array, which is divided into a plurality of pixel units, a phase of each pixel unit is adjusted by setting different voltages so that a phase pattern formed by the pixel units exhibits a lens property, and the light passing through the switching liquid crystal cell array is deflected by changing a center of the lens formed by the phase pattern, so as to select an outgoing port.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: September 3, 2019
    Assignee: Accelink Technologies Co., Ltd.
    Inventors: Liu Yang, Rui Yang, Zhilin Yuan, Lidan Song, Jinping Guo, Fan Wang, Yuhong Ma, Lihong Tang
  • Patent number: 10325571
    Abstract: A data communication method enabling wireless sharing of files or data between electronic devices that can store information and/or generate information by means of touch surface (capacitive or multi-touch), display units (LCD, led, etc.), photo sensor and frame having negative electrical conductivity.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: June 18, 2019
    Inventor: Osman Colakoglu
  • Patent number: 10314046
    Abstract: Multiple application devices (such as multiple application modules (MAMs) and multiple application units (MAUs)) for providing services in wireless distribution systems (WDSs) are disclosed. The multiple application devices are wireless telecommunication circuitry associated with wireless distribution components in a WDS. By associating multiple application devices into components of a WDS, network services, and applications within the WDS can be provided. The WDS may comprise a central unit, a plurality of remote units, and a plurality of multiple application devices associated with at least one of the central unit and at least one of the remote units. Each of the plurality of multiple application devices comprises at least one multiple applications processor, is connected to at least one other of the plurality of multiple application devices, and is configured to coordinate with one other multiple application device of the plurality of multiple application devices to provide a user requested service.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: June 4, 2019
    Assignee: Corning Optical Communications LLC
    Inventor: Aravind Chamarti
  • Patent number: 10200124
    Abstract: Unified optical fiber-based distributed antenna systems (DASs) for supporting small cell communications deployment from multiple small cell service providers are disclosed. The unified optical fiber-based DASs disclosed herein are configured to receive multiple small cell communications from different small cell service providers to be deployed over optical fiber to small cells in the DAS. In this manner, the same DAS architecture can be employed to distribute different small cell communications from different small cell service providers to small cells. Use of optical fiber for delivering small cell communications can reduce the risk of having to deploy new cabling if bandwidth needs for future small cell communication services exceeds conductive wiring capabilities. Optical fiber cabling can also allow for higher distance cable runs to the small cells due to the lower loss of optical fiber, which can provide for enhanced centralization services.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: February 5, 2019
    Assignee: Corning Optical Communications Wireless Ltd
    Inventors: Igor Berlin, William Patrick Cune
  • Patent number: 9800340
    Abstract: Unified optical fiber-based distributed antenna systems (DASs) for supporting small cell communications deployment from multiple small cell service providers are disclosed. The unified optical fiber-based DASs disclosed herein are configured to receive multiple small cell communications from different small cell service providers to be deployed over optical fiber to small cells in the DAS. In this manner, the same DAS architecture can be employed to distribute different small cell communications from different small cell service providers to small cells. Use of optical fiber for delivering small cell communications can reduce the risk of having to deploy new cabling if bandwidth needs for future small cell communication services exceeds conductive wiring capabilities. Optical fiber cabling can also allow for higher distance cable runs to the small cells due to the lower loss of optical fiber, which can provide for enhanced centralization services.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: October 24, 2017
    Assignee: Corning Optical Communications Wireless Ltd
    Inventors: Igor Berlin, William Patrick Cune
  • Patent number: 9608847
    Abstract: A device included in an analog distributed antenna system includes a first analog signal processing unit for receiving an analog communication signal, a first modulation/demodulation unit for converting a digital Ethernet signal received from an Ethernet network into an analog Ethernet signal, a multiplexing unit for multiplexing the analog communication signal signal-processed by the analog signal processing unit and the analog Ethernet signal converted by the modulation/demodulation unit, and a transmission unit for transmitting, to other devices included in the analog distributed antenna system, the analog communication signal and the analog Ethernet signal, which are multiplexed by the multiplexing unit.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: March 28, 2017
    Assignee: SOLID, INC.
    Inventor: Yeongshin Yeo
  • Patent number: 9282476
    Abstract: A REC device of a base station includes a switch instructing unit and an extension signal processor. The switch instructing unit monitors the state of the REC device, and based on a result of the monitoring, determines switching from the REC device to an extension REC device. When the switching is determined, the extension signal processor acquires a signal transmitted from the extension REC device, and requests the switching from the extension REC device. The extension REC device includes an extension signal processor and a digital processor. The extension signal processor receives the switch request from the extension signal processor of the REC device. In response to the received switch request, the digital processor sets the parameters of the REC device in the extension REC device, and establishes a link to a RE.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: March 8, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Takashi Fujita
  • Patent number: 9251689
    Abstract: Methods, architectures, circuits, and/or systems for tracking variations in the operating parameters of an optical or optoelectronic device are disclosed, as well as use of such variation data to monitor or control device functions and/or generate warnings and/or status flags. A method of tracking a variation in one or more operating parameters in an optical or optoelectronic device may include (i) monitoring one or more operating parameters of the device over time to determine values for each of the operating parameters, (ii) calculating the variation in each of the operating parameters as a function of time, (iii) comparing the variation to one or more predetermined thresholds, each threshold corresponding to an operational warning or alarm, and (iv) generating the operational warning or alarm when the variation exceeds the corresponding threshold.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: February 2, 2016
    Assignee: Source Photonics, Inc.
    Inventors: Yaxi Xiong, Todd Rope, Haifeng Zeng
  • Patent number: 9246617
    Abstract: Various aspects provide for aggregating a plurality of signals to generate a combined signal. An aggregation component is configured for reformatting a plurality of first signals and combining the plurality of first signals to generate a combined signal that comprises a higher data rate than a data rate associated with the plurality of first signals. A transmitter component is configured for receiving the combined signal and generating one or more data streams based on the combined signal. In an aspect, the aggregation component is additionally configured for reformatting and/or combining the plurality of first signals and at least one second signal to generate the combined signal. In another aspect, a receiver component is configured for generating a pseudo signal at a data rate of the combined signal. In yet another aspect, a de-aggregation component is configured for recovering the plurality of first signals and/or the at least one second signal from the pseudo signal.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: January 26, 2016
    Assignee: Applied Micro Circuits Corporation
    Inventors: Francesco Caggioni, Dimitrios Giannakopoulos
  • Patent number: 9236949
    Abstract: An optical transceiver generally includes an injection locked (IL) laser configured to generate a transmit (Tx) optical signal for transmission over an optical network and a laser driver circuit configured to modulate the IL laser based on a Tx data signal. The Tx data signal may be provided to the optical transceiver for transmission over the optical network. The Tx data signal may include a crossing point level associated with a transition between a first signal level and a second signal level. The optical transceiver may also include a crossing point control circuit configured to apply distortion to the Tx data signal, the distortion to increase the crossing point level.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: January 12, 2016
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Yi Wang, Huanlin Zhang
  • Patent number: 9164239
    Abstract: There is provided a method and apparatus for optically filtering a communication signal. More specifically, in one embodiment, there is provided an apparatus comprising an optical filter having first and second input ports and first and second output ports, the optical filter being configured to transmit light in a target frequency range to the first output port in response to receiving light at the first input port and being configured to transmit light in the target frequency range to the second input port in response to receiving light at the second output port, and first and second photodiodes, the first diode being located to be illuminated by light from the first output port and the second photodiode being located to be illuminated by light from the second input port.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: October 20, 2015
    Assignee: Alcatel Lucent
    Inventors: Douglas M. Gill, Mahmoud Rasras, Kun-Yii Tu
  • Patent number: 9014061
    Abstract: A user equipment (UE) including a processor configured to transmit control plane data irrespective of on-duration/off-duration status.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: April 21, 2015
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, James Earl Womack
  • Patent number: 8989577
    Abstract: A physical-layer device includes a first sublayer to receive a first continuous bitstream from a media-independent interface and to provide a second continuous bitstream to the media-independent interface. The physical-layer device also includes a second sublayer to transmit first signals corresponding to the first continuous bitstream onto an external link during a first plurality of time windows and to receive second signals corresponding to the second continuous bitstream from the external link during a second plurality of time windows. The second plurality of time windows is distinct from the first plurality of time windows.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Christian Pietsch, Nicola Varanese, Juan Montojo, Andrea Maria Garavaglia
  • Publication number: 20150055949
    Abstract: Node interconnect architectures to implement a high performance supercomputer are provided. For example, a node interconnect architecture for connecting a multitude of nodes (or processors) of a supercomputer is implemented using an all-to-all electrical and optical connection network which provides two independent communication paths between any two processors of the supercomputer, wherein a communication path includes at most two electrical links and one optical link.
    Type: Application
    Filed: October 9, 2014
    Publication date: February 26, 2015
    Inventors: Evan G. Colgan, Monty M. Denneau, Daniel M. Kuchta
  • Patent number: 8908570
    Abstract: A user equipment (UE) including a processor configured to transmit control plane data irrespective of on-duration/off-duration status.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: December 9, 2014
    Assignee: BlackBerrry Limited
    Inventors: Yi Yu, Zhijun Cai, James Earl Womack
  • Publication number: 20140270758
    Abstract: An optical communication apparatus and printed circuit board (PCB), which include an optical interface for realizing concurrent read and write operations, and a data processing system including a memory module and the PCB are provided. The optical communication apparatus includes an optical interface unit configured to output optical signal of first data and receive optical signal of second data simultaneously, and an optical bus configured to transmit the optical signals between the first optical interface unit and a second optical interface unit, the second optical interface unit being configured to receive the optical signal of the first data and output the optical signal of the second data simultaneously. The optical signal of the first data and the optical signal of the second data have polarizations, respectively, orthogonal to each other.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Amir Hossein Nejadmalayeri, Yoon Dong Park, Hyun Il Byun, In Sung Joe
  • Publication number: 20140219652
    Abstract: An apparatus, in accordance with particular embodiments, includes an interface configured to establish connections within a copper network. The apparatus also includes a receptacle configured to receive a conventional small form-factor pluggable (SFP) module or a compact SFP module and to direct the SFP modules to a first connector. The first connector connects either of the SFP modules to the node. A pin of the first connector is configured to receive a module detection signal and to transmit data to the compact SFP module. The apparatus also includes a low pass filter coupled to the pin of the first connector that passes the module detection signal to the node. The apparatus is further configured to establish two duplex connections with an optical fiber network if the compact SFP module is connected and to establish one duplex connection with the optical fiber network if the conventional SFP module is connected.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Inventors: Liang-Ping Peng, Norman Tang, David Lai
  • Patent number: 8781327
    Abstract: An apparatus comprising at least one processor configured to receive a wavelength-division-multiplexed (WDM) signal from a remote node, wherein the WDM signal comprises a first channel carrying a first remotely generated signal, a second channel carrying a second remotely generated signal, and a third channel, adapt the WDM signal into a composite WDM signal by: dropping the first remotely generated signal from the first channel; adding a first locally generated signal to the first channel; and adding a second locally generated signal to the third channel, and provide wavelength locking to the first locally generated signal and the second locally generated signal without providing wavelength locking to the second remotely generated signal.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: July 15, 2014
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xiao A. Shen, Hongbing Lei, Yu Sheng Bai
  • Publication number: 20140178064
    Abstract: There is provided a signal transmission device including reception processing units for respective channels, so as to enable multichannel transmission by dividing frequency bands. The total number of channels is equal to or greater than three. When full-duplex two-way communication is applied in any combination of two channels, one of reception processing unit include a signal suppressing unit configured to suppress a signal component of a channel other than a self channel.
    Type: Application
    Filed: September 2, 2011
    Publication date: June 26, 2014
    Applicant: Sony Corporation
    Inventor: Yasufumi Hino
  • Patent number: 8699585
    Abstract: Transmitters for data communication can include a pattern generator configured to generate parallel data stream composed of k bits, k being a natural number greater than 2, a serializer configured to convert the parallel data stream into a serial data stream, a pre-emphasis circuit configured to pre-emphasize the serial data stream based on a pre-emphasis control value, to transmit the pre-emphasized serial data stream to a receiver via a first transmission line, and a pre-emphasis controller configured to receive measured values of transmission errors of the pre-emphasized serial data stream from the receiver via a second transmission line, and configured to set the pre-emphasis control value corresponding to a minimum measured value of the transmission errors, to an optimum pre-emphasis control value.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: April 15, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hitoshi Okamura
  • Publication number: 20130343753
    Abstract: A physical-layer device includes a first sublayer to receive a first continuous bitstream from a media-independent interface and to provide a second continuous bitstream to the media-independent interface. The physical-layer device also includes a second sublayer to transmit first signals corresponding to the first continuous bitstream onto an external link during a first plurality of time windows and to receive second signals corresponding to the second continuous bitstream from the external link during a second plurality of time windows. The second plurality of time windows is distinct from the first plurality of time windows.
    Type: Application
    Filed: March 11, 2013
    Publication date: December 26, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Christian Pietsch, Nicola Varanese, Juan Montojo, Andrea Maria Garavaglia
  • Patent number: 8417116
    Abstract: Disclosed is an RoF system providing an HD wireless communication service.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 9, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Ho Kim, Seong-Taek Hwang, Yun-Je Oh, Byung-Jik Kim
  • Publication number: 20130039654
    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: Application
    Filed: August 11, 2011
    Publication date: February 14, 2013
    Inventors: Kwang Soo Park, Moon Soo Park, Christian Hoede, Jan A.W. Venema
  • Publication number: 20130028600
    Abstract: A communication system includes a configurable transceiver that accommodates multi-band, multi-format signals by incorporating a duplex transceiver circuit, a simplex transceiver circuit and at least two switches. A first switch may be operated so as to configure the configurable transceiver to propagate duplex signals, such as for example, frequency division multiplexed (FDD) signals. The second switch may be operated so as to configure the simplex transceiver circuit to provide signal propagation of various types of signals in either a receive direction or a transmit direction. The various types of signals include time division multiplexed (TDD) signals.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY, LTD.
    Inventors: Jae Joon Chang, Youngsik Hur
  • Patent number: 8346091
    Abstract: A distributed antenna system is provided for communicating with a plurality of base stations. The distributed antenna system includes a system controller and a master unit communicating with at least one of the plurality of base stations. A remote unit communicates over a high data rate media with the master unit and/or a downstream remote unit. Alternatively, the distributed antenna system includes a controller and a digital time/space crosspoint switch controlled by the controller. A digitizing transceiver is in communication with the digital time/space crosspoint switch. The crosspoint switch is configured to transmit and receive digital data through the digitizing transceiver.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: January 1, 2013
    Assignee: Andrew LLC
    Inventors: Thomas Kummetz, Donald McAllister, Carmine Pagano, Hongju Yan, Dennis M. Cleary, Van Hanson, Mathias Schmalisch, Stefan Eisenwinter
  • Patent number: 8340522
    Abstract: There is provided a filter assembly for combining a wavelength multiplexed optical signal by multiplexing optical signals of different wavelength emitted from respective optical devices, and/or for dividing a wavelength multiplexed optical signal into optical signals of different wavelength and causing the optical signals of different wavelength to enter respective optical devices. This filter assembly comprises: a light transmitting member within which each optical signal propagates; plural optical filters disposed on an upper face of the light transmitting member at a predetermined spacing wherein each optical signal passes through the optical filters; upper reflective layers respectively provided between adjacent ones of the optical filters; and a lower reflective layer provided on a lower face of the light transmitting member, and wherein the wavelength multiplexed optical signal propagates along the same optical path within the light transmitting member.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: December 25, 2012
    Assignee: Hitachi Cable, Ltd.
    Inventors: Juhyun Yu, Ryuta Takahashi, Noribumi Kobayashi, Seiji Maruo, Hiroki Katayama, Yuuki Naganuma
  • Patent number: 8335430
    Abstract: An optical data transmission apparatus is provided, in which a first communication unit 101 and a second communication unit 102 arranged to freely move relatively to each other each include an optical signal transmission unit having a laser diode 120 for emitting single-mode light, a multi-mode optical fiber 111 for guiding a single-mode optical signal output from the laser diode 120 , converting the single-mode optical signal into a multi-mode optical signal, and outputting the multi-mode optical signal, an optical lens 112 for forming the optical signal output from the multi-mode optical fiber 111 into parallel light, and a first polarization element for passing the optical signal polarized in a predetermined direction out of optical signals output from the optical lens 112.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: December 18, 2012
    Assignee: Hokuyo Automatic Co., Ltd.
    Inventors: Yoji Maejima, Masanori Hino
  • Patent number: 8306011
    Abstract: A device includes a processor and a time slot assigner, connected to a communication line via a physical layer unit. The physical layer unit is adapted to generate a communication line clock signal and a multi-frame synchronization signal. The device also includes a transmit media access controller (MAC) adapted to receive the multi-frame synchronization signal and the communication line clock signal and in response to scan, during a single multi-frame transmission period, multiple transmit MAC memory entry groups such as to retrieve transmission instructions and in response to enable access to the communication line. During a single multi-frame transmission period the transmit MAC accesses at least twice at least one transmit MAC memory entry group. The processor receives a processor clock signal that differs from the communication line clock signal. The MAC also performs reception operations using receive clock and sync signals.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: November 6, 2012
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Eran Glickman, Oren Gelberg, Dan Ilan
  • Patent number: 8285144
    Abstract: An optical device for rearranging wavelength channels in an optical network is disclosed. The optical device has a wavelength selective coupler having one input port and a plurality of output ports coupled to a plurality of input ports of an optical grating demultiplexor such as an arrayed waveguide grating. The wavelength channels in each of the input ports are dispersed by the demultiplexor and are directed to a plurality of output ports of the optical grating demultiplexor. As a result, at least one wavelength channel at each of the input ports of the optical grating demultiplexor is coupled into a common output port. The optical device is useful in passive optical networks wherein a same demultiplexor is used for simultaneous multiplexing and demultiplexing of wavelength channels.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: October 9, 2012
    Assignee: JDS Uniphase Corporation
    Inventors: Hiroaki Yamada, Barthelemy Fondeur, Jinxi Shen, Zi-Wen Dong, Domenico Di Mola, Jyoti K. Bhardwaj, Yimin Hua
  • Patent number: 8275228
    Abstract: A network interface unit (NIU) for a modular workstation includes a housing. One or more input network adapters on the housing receive input connectors of a first multi-network cable that is connected to a distribution network. One or more output network adapters on the housing receive output connectors of a second multi-network cable that is connected to another NIU of another modular workstation to provide for a daisy chain connection. One or more workstation adapters are provided on the housing for providing connections to one or more networks of various security levels. Cables that are connected to one or more CPUs or telephones of the workstation are connected to respective ones of the workstation adapters. The workstation adapters of the NIU may provide one or more of visual, physical, and geographical verification and segregation of the network connections to enhance the integrity of the security of the various networks available at the NIU.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: September 25, 2012
    Assignee: CommScope, Inc. of North Carolina
    Inventors: Joseph C Livingston, David Hall, Richard L Case, Ron Mudd, Kevin M. Gleason
  • Patent number: 8265482
    Abstract: A communication network access device is adapted for duplex communication and provides transmit and receive signal paths. A controllable socket is coupled to the transmit and receive signal paths and linked to a control interface for activating/deactivating the control interface. A pluggable module is coupled to the transmit and receive signal paths via the controllable socket in an activated status and to a transmission path carrying uni-directional signals. The module includes a first optical device and a splitter in the transmission path and is coupled to a second optical device via the splitter. The second optical device responds to a portion of uni-directional signals provided by the splitter for placing the communication access device in a link up condition for uni-directional signals provided by the first optical device to the transmission path serving an optical local area network.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 11, 2012
    Assignee: Fujitsu Limited
    Inventors: Gary R. Burrell, Sheng Wu
  • Publication number: 20120163811
    Abstract: A novel parallel optical module having combined optical signal transmit and receive function for high-speed performance. The optical module includes a plurality, e.g., sixteen 10-Gb/s transmitter and receiver channels for a 160-Gb/s bidirectional aggregate data rate. The module utilizes a single-chip CMOS optical transceiver containing both transmitter and receiver circuits. 16-channel high-speed photodiode (PD) and VCSEL arrays are flip-chip attached to the low-power CMOS IC. The substrate emitting/illuminated VCSEL and PD arrays operate at 985 nm and include collimating lenses integrated into the backside of the substrate. The IC-OE assembly is then flip-chip attached to a high density organic package forming the transceiver optical module. The exclusive use of flip-chip packaging for both the IC-to-optoelectronic (OE) devices and for the IC-to-organic package minimizes the module footprint and associated packaging parasitics.
    Type: Application
    Filed: March 26, 2007
    Publication date: June 28, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Fuad Doany, Clint L. Schow
  • Patent number: 8180225
    Abstract: The invention provides an optically powered device interface module for operating an external device, and an optically powered data link comprising the same. In one embodiment the device interface module includes an optical interface for receiving optical power and data signals, an electrical USB interface for providing USB compliant electrical data signals and a 5V electrical power signal to an external USB device, a transducer coupled to a signal processor for converting the optical power and data signals into the 5V electrical power signal and the USB-compliant electrical data signals, and a power distribution circuit for providing electrical power obtained from the optical power signal to the device interface module circuitry. The transducer may be embodied using a single photovoltaic power converter for receiving the optical power and for receiving and transmitting optical data signals.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: May 15, 2012
    Inventors: Jan-Gustav Werthen, Ta-Chung Wu
  • Patent number: 8090259
    Abstract: A system and method for optimizing the selection of ghost channels to mitigate the effects of polarization hole burning in a node of an optical communication system including identifying an optical communication channel in the node for use as a ghost channel, identifying a first set of degrees carrying the optical communication channel within the node, identifying a second set of degrees within the first set of degrees, the second set containing the degrees with the optical communication channel being a valid channel, identifying a third set of degrees within the first set of degrees, the third set containing degrees with the optical communication channel being sufficiently powerful, and selecting a first degree to source the ghost channel from the first set of degrees based at least on the second set of degrees and the third set of degrees.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 3, 2012
    Assignee: Fujitsu Limited
    Inventors: Denis Daniel Leclair, Sean D. L. McVeigh, Kevan P. Jones, Jean V. E. Ouellet, Douglas J. Greenwood, John B. Mills, Robert W. Keys
  • Publication number: 20110318000
    Abstract: An optical bus. Optical sub-assemblies are used to connect lengths of optical fiber to form a single optical fiber that is a bus. A master transceiver may be connected to one end of the fiber and nodes can be connected to the optical sub-assemblies. Each optical sub-assembly includes a center fiber with a mirror that enables each connector to reflect optical signals out of the fiber and that enables a node to launch optical signals on the optical bus. The optical bus can also be connected with a second transceiver that may be used to deliver optical power to the attached nodes. Some nodes include two optical subassemblies to enable bidirectional communication on the optical bus.
    Type: Application
    Filed: September 2, 2011
    Publication date: December 29, 2011
    Applicant: FINISAR CORPORATION
    Inventor: Frank Levinson
  • Publication number: 20110305455
    Abstract: The present invention relates transmission network, which involves Passive Optical Network and thereto connected units, e.g. Optical Network Units. It is an object of the present invention to provide a solution to the upstream data packet traffic congestion problem in transmission networks that comprises a PON system. Said problem is solved by providing adapted node devices and methods for such scheduling control that within the prescribed standard requirements, e.g. QoS, for passive optical network systems eliminate the congestion problem.
    Type: Application
    Filed: February 24, 2009
    Publication date: December 15, 2011
    Applicant: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ole Helleberg Andersen, Michael Valentin Juhl
  • Patent number: 8059963
    Abstract: A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for dividing each of a downlink optical signal carrying service data and an optical signal carrying transmission/reception control information of the RoF wired relay system, which are input from a base station, a gain controller for separating an uplink Radio Frequency (RF) signal input from an antenna or a portion of a downlink RF signal output from a High-Power Amplifier (HPA) and for monitoring the strength of the input and output RF signals in order to control a gain of the LNA.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: November 15, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Ho Kim, Yun-Je Oh, Seong-Taek Hwang, Han-Lim Lee, Ki-Uk Song
  • Publication number: 20110262131
    Abstract: Bidirectional data signals are exchanged between a central unit and a plurality of network terminals. The optical carrier frequencies of the downstream and upstream signals are chosen so that reflections do not interfere with the selected signal at the optical network unit and not with the received upstream signals at the central unit. The optical network units select their associated downstream signal and generate an associated upstream signal.
    Type: Application
    Filed: June 30, 2011
    Publication date: October 27, 2011
    Applicant: NOKIA SIEMENS NETWORKS OY
    Inventors: ERICH GOTTWALD, SYLVIA SMOLORZ
  • Patent number: 8045858
    Abstract: A method for transmission of multiple, independent data packages across a single optical fiber utilizing both time division multiplexing and wavelength division multiplexing is described. The method includes transmitting a first data package across the single optical fiber at a first wavelength and transmitting a second data package across the same optical fiber at a second wavelength, in either the same direction or in a direction opposite as the first data package, wherein the second data package transmission may be concurrent with the first data package transmission. the method further includes separating the data package transmissions into two optical paths, filtering the second wavelength from a first of the two optical paths, detecting the first data package at the first wavelength, filtering the first wavelength from a second of the two optical paths, and detecting the second data package data at the second wavelength.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 25, 2011
    Assignee: The Boeing Company
    Inventor: Tuong Truong
  • Patent number: 8041222
    Abstract: A radio over fiber link apparatus for transmitting/receiving radio frequency up/downlink signals in a TDD mobile communication system. The radio over fiber link apparatus includes a center site for receiving radio frequency signals from an access point of the mobile communication system. The center site has a first electro-optic converter for converting the radio frequency signals into optical signals, bias control of the first electro-optic converter being performed based on the switching of TDD signals; and a remote for transmitting the radio frequency signals to a mobile communication terminal through an antenna. The remote site has a first photoelectric converter for converting the optical signals transmitted through an optical fiber from the center site into radio frequency signals.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 18, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-Lim Lee, Hoon Kim, Seong-Taek Hwang
  • Publication number: 20110211832
    Abstract: D-shaped POFs are used to form a 2-to-1 optical coupler. The D-shaped POFs are produced via an extrusion process that is relatively inexpensive to perform and that can be performed with relatively high manufacturing throughput. The D-shaped POFs are bonded together to form a coupler end face having a generally circular cross-sectional area. The coupler end face is interfaced with an end face of a main POF that is generally circular in cross-sectional shape. The resulting D-shaped 2-to-1 optical POF couplers have relatively low insertion loss and relatively high optical coupling efficiency.
    Type: Application
    Filed: February 26, 2010
    Publication date: September 1, 2011
    Applicant: Avago Technologies Fiber IP (Singapore) Pte. Ltd.
    Inventor: Nikolaus W. Schunk
  • Publication number: 20110200329
    Abstract: Gigabit Ethernet connectivity is realized using off-the-shelf GIGABIT INTERFACE CONVERTER transceivers, wave division multiplexer/demultiplexers, and a single optical fiber. Simultaneous and bi-directional optical communication over a single optical fiber connecting two or more nodes is achieved by using at least one GIGABIT INTERFACE CONVERTER transceiver having at least one optical signal output and an optical signal input that are of different wavelengths from each other.
    Type: Application
    Filed: October 18, 2010
    Publication date: August 18, 2011
    Applicant: TECHNOLOGY ADVANCEMENT GROUP, INC.
    Inventors: John A. McEwan, James S. McEwan
  • Patent number: 7956701
    Abstract: A method for the contactless transmission of at least one differential signal between a transmitter and a receiver given the existence of at least one common-mode noise signal, which has a low frequency in comparison with at least one signal to be transmitted, is provided. The suppression of at least one common-mode noise signal within the receiver a ground reference potential assigned to the receiver is separated into two ground reference potentials decoupled from one another. At least one common-mode noise signal may be suppressed by a filter unit at the input of a receive amplifier of the receiver.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: June 7, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Markus Hemmerlein, Helmut Repp
  • Publication number: 20110129214
    Abstract: An extender box (EB) includes: a downlink data sending module configured to send downlink data to first passive optical network (PON) devices; at least two uplink data receiving modules configured to receive uplink data sent from a corresponding first PON device respectively; and a duplexer configured to convert the data transmission mode used by the downlink data sending module and the uplink data receiving modules from dual-fiber transmission to single-fiber transmission to implement single-fiber bidirectional transceiving. The uplink data receiving modules have ports corresponding to uplink ports of the first PON devices on a one-to-one basis. Optical fibers of the uplink data receiving modules that are connected with the uplink ports of the first PON devices are separated from optical fiber of the downlink data sending module, where the optical fiber is connected with downlink ports of the first PON devices. A data transmission method and a PON system are also disclosed.
    Type: Application
    Filed: December 30, 2010
    Publication date: June 2, 2011
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Ruobin Zheng
  • Patent number: 7945166
    Abstract: A network interface apparatus comprises a bidirectional optical signal port, an optical diplexer connected to the bidirectional optical signal port, a first RF signal port (bidirectional), a second RF signal port, a first RF diplexer, and an RF splitter. The RF diplexer transmits a first received RF input signal from the first RF signal port to the optical diplexer to modulate an optical output signal transmitted by the optical diplexer to the optical signal port. The RF splitter receives from the optical diplexer an RF signal derived from an RF-modulated optical input signal received from the bidirectional optical signal port, transmits a first portion of the derived RF signal as a first RF output signal to the first RF signal port through the first RF diplexer, and transmits a second portion of the derived RF signal as a second RF output signal to the second RF signal port.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: May 17, 2011
    Assignee: HOYA Corporation USA
    Inventor: Henry A. Blauvelt
  • Publication number: 20110081145
    Abstract: A communication network access device is adapted for duplex communication and provides transmit and receive signal paths. A controllable socket is coupled to the transmit and receive signal paths and linked to a control interface for activating/deactivating the control interface. A pluggable module is coupled to the transmit and receive signal paths via the controllable socket in an activated status and to a transmission path carrying uni-directional signals. The module includes a first optical device and a splitter in the transmission path and is coupled to a second optical device via the splitter. The second optical device responds to a portion of uni-directional signals provided by the splitter for placing the communication access device in a link up condition for uni-directional signals provided by the first optical device to the transmission path serving an optical local area network.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 7, 2011
    Applicant: FUJITSU NETWORK COMMUNICATIONS, INC.
    Inventors: Gary R. Burrell, Sheng Wu
  • Patent number: 7920493
    Abstract: A method of initiating a set up process for a call between users with reduced set up times using one or more 3G telecommunication networks. The method is provided between at least a pair of H.324-like terminals coupled to the one or more 3G telecommunication networks. The method includes establishing a bearer channel between a first terminal and a second terminal after a call signaling process, transmitting a first FSS message from the first terminal to the second terminal. The first FSS message includes a first preference profile associated with a first mode of operation for the call and a second preference profile associated with a second mode of operation for the call. The method also includes selecting either the first mode of operation or the second mode of operation.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: April 5, 2011
    Assignee: RPX Corporation
    Inventors: Marwan Jabri, Albert C. Wong, David Jack, Brody Kenrick, Robert Jongbloed
  • Patent number: 7889996
    Abstract: Embodiments of a system are described. This system includes an array of chip modules (CMs) that are configured to communicate data signals with each other via optical communication. In a given CM module, optical signal paths, such as waveguides, are routed in the same way as in the other CMs in the array. In this way, a common optical design in the CMs may be used in the system to prevent data conflicts during the optical communication.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: February 15, 2011
    Assignee: Oracle America, Inc.
    Inventors: Xuezhe Zheng, Ashok V. Krishnamoorthy, John E. Cunningham
  • Patent number: RE43964
    Abstract: A method and apparatus for sectorizing coverage of a cellular communications area includes providing a remote unit having microcell antenna units. Each microcell antenna unit is configured to cover a particular sector. The remote unit is connected to a sectorized base station unit which is connected to a mobile telecommunications switching office. Separate digitized streams representative of telephone signals received from the mobile telecommunications switching office are generated corresponding to the microcell antenna units and the separate digitized streams are multiplexed and transmitted to the remote unit. The remote unit demultiplexes the multiplexed digitized streams into the separate digitized streams corresponding to the microcell antenna units and the separate digitized streams are converted to RF signals for coverage of a particular sector by the corresponding microcell antenna unit.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: February 5, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventors: Larry G. Fischer, David S. Russell, Philip M. Wala, Charles R. Ratliff, Jeffrey O. Brennan
  • Patent number: RE45321
    Abstract: A method and apparatus for sectorizing coverage of a cellular communications area includes providing a remote unit having microcell antenna units. Each microcell antenna unit is configured to cover a particular sector. The remote unit is connected to a sectorized base station unit which is connected to a mobile telecommunications switching office. Separate digitized streams representative of telephone signals received from the mobile telecommunications switching office are generated corresponding to the microcell antenna units and the separate digitized streams are multiplexed and transmitted to the remote unit. The remote unit demultiplexes the multiplexed digitized streams into the separate digitized streams corresponding to the microcell antenna units and the separate digitized streams are converted to RF signals for coverage of a particular sector by the corresponding microcell antenna unit.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 6, 2015
    Assignee: ADC Telecommunications, Inc.
    Inventors: Larry G. Fischer, David S. Russell, Philip M. Wala, Charles R Ratliff, Jeffrey O. Brennan