Multiple Access (e.g., Tdma, Csma) Patents (Class 398/99)
  • Patent number: 10334335
    Abstract: The present invention discloses a method for assigning and processing a label in an optical network. The method includes: learning that a label switched path is required to be established in an optical network; generating a label, in which the label is used for indicating that a first optical channel data unit is multiplexed to a second optical channel data unit; the label includes a tributary slot type indication field that is used for indicating a tributary slot type of the second optical channel data unit, and the label further includes a tributary slot assignment indication field that is used for indicating a tributary slot occupied in the second optical channel data unit into which the first optical channel data unit is multiplexed; and sending the label to a node on the label switched path by a signaling message of GMPLS.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: June 25, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yi Lin, Xiaobing Zi
  • Patent number: 10205606
    Abstract: A lighting system includes lighting devices and a controller. An Over-The-Air (OTA) update of lighting device programming is delivered via point-to-point connections between the controller and some number of lighting devices and/or between the lighting devices. Delivery of the OTA update from one lighting device to another lighting device is triggered based on an update command sent via a wireless mesh network of the lighting system.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: February 12, 2019
    Assignee: ABL IP HOLDING LLC
    Inventors: Konstantin Klitenik, Emanuel Paul Malandrakis
  • Patent number: 9966994
    Abstract: Apparatus and methods are provide for frame synchronization and clock and data recovery. In an example, a method can include receiving initial data of a stream of information, sampling the stream of information a plurality of times per unit interval to provide a plurality of sample intervals, integrating transition information for each sample interval, and selecting a sampling phase to sample each symbol of the stream of data using the integrated transition information.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: May 8, 2018
    Assignee: Fmax Technologies, Inc.
    Inventors: David Erich Tetzlaff, Iain Ross Mactaggart
  • Patent number: 9955112
    Abstract: Provided is a digital-image transmission apparatus including a transmitting unit connected to a host device and a receiving unit connected to a display device. The transmitting unit includes a host-side additional-communication control unit that controls additional communication for digital image transmission. The host-side additional-5 communication control unit performs communication with an external device to diagnose an operation state of the transmitting unit, transmit a diagnosis result to the external device, and control an operation of the transmitting unit.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: April 24, 2018
    Assignee: OPTICS CO, LTD.
    Inventors: Won Seok Jung, Jae Chul Ko, Doo Soo Ha, Yoo Sung Tak
  • Patent number: 9253758
    Abstract: Techniques are disclosed that dynamically allocate communications resources in a wireless communications network, such as a wireless personal area network (WPAN). For instance, a wireless communications device may obtain a resource allocation. This resource allocation includes a time slot (e.g., a TDMA time slot) within a wireless communications medium. The device determines a first portion of the time slot in which it intends to transmit data. Also, the wireless communications device relinquishes a second portion of the time slot that occurs after the first portion of the time slot. Based on this relinquishment, a central controller device may reallocate the second portion of the time slot.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: February 2, 2016
    Assignee: Intel Corporation
    Inventors: Solomon Trainin, Herbert Liondas
  • Patent number: 9191117
    Abstract: The present disclosure provides high-speed wavelength division multiplexing (WDM) transponders (e.g., 10 Gb/s, 40 Gb/s, 100 Gb/s, and beyond) that receive one or more optical signals and convert and/or remodulate the received optical signals onto a newly generated optical channel along with overhead processing/addition, forward error correction, and the like. In general, the transponders of the present invention include a client-side and a line-side, each with bi-directional optical transmission. The transponders provide an effective mechanism to support WDM networks that are transparent to the client-side.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: November 17, 2015
    Assignee: Ciena Corporation
    Inventors: Stephen B. Alexander, Michael Y. Frankel, Steve W. Chaddick, Roy C. Litz, Cecil D. Smith
  • Patent number: 9185011
    Abstract: A system and method is provided whereby more data packets than are necessary may be transmitted in order to prompt a node of network to more quickly increase the number of packets that will be accepted by the node. In one aspect, a single packet of data is split into multiple packets. In another aspect, a single packet of data is padded so that multiple packets need to be sent.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: November 10, 2015
    Assignee: Google Inc.
    Inventors: James Roskind, Michael A. Belshe
  • Patent number: 9083638
    Abstract: Technologies are generally described for a data transmission scheme for a cloud-based system. In some examples, a data transmission system may include a communication speed determination unit configured to determine communication speed between a server and multiple client devices connected to the server; a client classification unit configured to classify each of the multiple client devices based at least in part on the communication speed determined by the communication speed determination unit; and a data transmission unit configured to transmit a predetermined portion of data to one or more of the client devices connected to the server.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: July 14, 2015
    Assignee: EMPIRE TECHNOLOGY DEVELOPMENT LLC
    Inventor: Seungil Kim
  • Patent number: 9059808
    Abstract: A microprocessor chip includes a plurality of processors; at least one first optical input/output unit configured to receive optical signals from an external device and transmit optical signals to the external device; and an optical system bus that is connected between the plurality of processors and the at least one first optical input/output unit.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: June 16, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-jung Kim, Young-soo Park
  • Patent number: 9042737
    Abstract: In the present invention, wasted power consumption caused when a clock and data recovery unit in an optical network unit in a PON system is activated from a power-saving state is reduced and rapid, secure communication is performed. A clock and data recovery unit includes a phase-locked loop that can be set to normal mode or power-saving mode and that includes a voltage-controlled oscillator and recovers a clock signal and a data signal from input signals. The clock and data recovery unit includes a reference clock multiplier circuit that multiplies a reference clock signal and outputs the multiplied reference clock signal; and a frequency training loop that includes the same voltage-controlled oscillator and performs synchronous oscillation training by the voltage-controlled oscillator using the reference clock multiplier circuit before the phase-locked loop transitions from power-saving mode to normal mode.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: May 26, 2015
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Naruto Tanaka
  • Patent number: 9014561
    Abstract: A method and system for upgrading service to an optical network terminal among a plurality of optical network terminals on a passive optical network. The upgrade enables bidirectional communications between a central office and the optical network terminal over dedicated downstream and upstream wavelength channels outside the downstream and upstream wavelength bands associated with the passive optical network. The optical network terminal to receive upgraded service is disconnected from a passive optical splitter at a remote node serving the optical network terminal, and optically coupled to a port of the multi-port arrayed waveguide grating at the remote node. Wavelength taps are provided at the central office and the remote node to facilitate multiplexing and demultiplexing the dedicated downstream and upstream channels with the downstream and upstream wavelength bands associated with the passive optical network.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: April 21, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Patrick P. Iannone, Mark D. Feuer, Kenneth C. Reichmann, Kent G. McCammon
  • Patent number: 9008516
    Abstract: A method, an apparatus, and a system for transmitting information in a passive optical network are provided. The method mainly includes: obtaining OAM information that an RE device needs to report to an OLT device, performing modulation processing, according to the OAM information, on a downlink optical signal sent by the OLT device, and returning the downlink optical signal after the modulation processing to the OLT device; or, obtaining OAM information that an OLT device needs to deliver to an RE device, performing modulation processing, according to the OAM information, on a downlink optical signal sent by the OLT device to the RE device, and sending the downlink optical signal after the modulation processing to the RE device.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: April 14, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kun Li, Shiyi Cao, Jianlin Zhou, Min Ye
  • Patent number: 8977131
    Abstract: An optical apparatus receives an upward signal light from a plurality of subscriber units, where the upward signal light is composed of a plurality of time slots corresponding to the plurality of optical subscriber units. The optical apparatus includes a driving unit configured to determine a respective required gain for light from each of the plurality of optical subscriber units, an amplifying section configured to amplify the upward signal light with the required gain corresponding to the time slots of the upward signal light, and a receiver configured to receive the amplified upward signal light.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: March 10, 2015
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Susumu Kinoshita
  • Patent number: 8971711
    Abstract: The present invention discloses a method for assigning and processing a label in an optical network. The method includes: learning that a label switched path is required to be established in an optical network; generating a label, in which the label is used for indicating that a first optical channel data unit is multiplexed to a second optical channel data unit; the label includes a tributary slot type indication field that is used for indicating a tributary slot type of the second optical channel data unit, and the label further includes a tributary slot assignment indication field that is used for indicating a tributary slot occupied in the second optical channel data unit into which the first optical channel data unit is multiplexed; and sending the label to a node on the label switched path by a signaling message of GMPLS.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: March 3, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yi Lin, Xiaobing Zi
  • Patent number: 8948589
    Abstract: A manner of providing for testing of access fibers in a PON (passive optical network) using OTDR (optical time-domain reflectometry). According to the invention, a PON includes an optical splitter module having one or more optical couplers that combines downstream light from 1×N optical splitter directing the output of an OLT (optical line terminal) and a cyclic AWG (arrayed waveguide grating) for transmission toward one or more ONUs (optical network units). The splitter module is preferably formed on a single semiconductor chip, such as a PIC (photonic integrated circuit) chip and may reside in an outside plant of the PON.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: February 3, 2015
    Assignee: Alcatel Lucent
    Inventors: Joseph L. Smith, Ronald Heron
  • Patent number: 8942566
    Abstract: A bandwidth allocator for communicating with communication terminals by transmitting and receiving data packets over a line having its communication bandwidth divided into periods of time of a predetermined length. The allocator includes a controller controlling allocation of the bandwidth by using allocation grants as the periods of time. The controller includes a scheduler scheduling the allocation grants so as to cause one allocation grant to partially overlap as a shared grant with another allocation grant adjacent to the one allocation grant. Thus, the bandwidth allocator can minimize allocation loss, otherwise caused by no allocation to an allocation grant, and improve the use efficiency of the bandwidth.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: January 27, 2015
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Hideaki Tamai, Akihiro Takahashi, Satoshi Furusawa, Akiya Suzuki
  • Patent number: 8891973
    Abstract: A receiving unit using a voltage-controlled oscillator is allowed to compensate for the frequency characteristics of the voltage-controlled oscillator resulting from temperature change, without adding a capacitive element for temperature compensation. A receiving unit and an optical line terminal include a clock and data recovery circuit that extracts a clock signal and a data signal from a received signal, and have: a calibrator that calibrates an oscillation frequency of a voltage-controlled oscillator included in the clock and data recovery circuit; and a managing unit having a function of managing a schedule for receiving signals, the managing unit selecting a time where a duration of a certain state meets a time required for calibration by the calibrator to thereby output a reset signal (calibration instruction signal) to the calibrator, the state having no received signal (upstream signal) from which a clock signal and a data signal are to be extracted.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: November 18, 2014
    Assignees: Sumitomo Electric Industries, Ltd., Ensphere Solutions, Inc.
    Inventor: Naruto Tanaka
  • Patent number: 8886043
    Abstract: The disclosure provides an optical network system, an Optical Line Terminal (OLT), an Optical Network Unit (ONU) and an Optical Distribution Network (ODN) apparatus. The system includes: an OLT configured to modulate and encode at least one line of time-division-multiplexed downlink signals, synthesize the downlink signals encoded into one line and then output it, receive uplink signals, and decode the uplink signals received and then output them; an ODN configured to separate the downlink signals received into multiple lines and then output them, synthesize the uplink signals received into one line, and then output it to the OLT; and ONUs configured to receive the downlink signals output from the ODN, decode the downlink signals received and output them, encode one line of time-division-multiplexed uplink signals, and output the uplink signals encoded to the ODN. Decoding of the downlink signals and encoding of the uplink signals can further be implemented by the ODN.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: November 11, 2014
    Assignee: ZTE Corporation
    Inventors: Biao Chen, Liang Cheng, Dawei Wang, Songlin Zhu, Dan Geng
  • Publication number: 20140233958
    Abstract: A method, system, and apparatus for a uni-fiber laser communications (lasercom) terminal are disclosed herein. The apparatus includes an oscillator to generate a first signal having a first wavelength, and a modulator to modulate the first signal. The apparatus further includes a circulator to circulate the first signal, and a bi-directional optical amplifier (optical amp) to amplify the first signal. Also, the apparatus includes an optical fiber, which is embedded in a ferrule, and an end of the ferrule is coated with a reflective coating. Additionally, the apparatus includes at least one lens, where the first signal is transmitted through and received through the optical fiber and at least one lens. Also, the apparatus includes an acquisition detector to detect the first signal. Further, the apparatus includes an actuator associated with the ferrule to nutate and translate the ferrule according to feedback from the acquisition detector regarding the first signal.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 21, 2014
    Applicant: THE BOEING COMPANY
    Inventor: THE BOEING COMPANY
  • Patent number: 8781318
    Abstract: A method and an optical component for data processing in an optical network are provided, wherein two sets of wavelengths are allocated; wherein at least one set of wavelengths is monitored; and wherein a collision between the two sets of wavelengths is avoided or compensated by adjusting at least one laser of an optical component. Furthermore, an optical communication system is suggested including said optical component.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 15, 2014
    Assignee: Xieon Networks S.a.r.l.
    Inventors: Rohde Harald, Treyer Thomas
  • Patent number: 8755695
    Abstract: A burst transmission method and a receiver resetting method and apparatus in a Passive Optical Network (PON) are provided. A burst receiver resetting method in a PON includes: receiving a preamble sequence and synchronizing data; after synchronizing the data, continuing to receive the data, and matching a Burst Terminator (BT); and resetting a receiver after successfully matching the BT. Meanwhile, an apparatus for implementing the method and a corresponding burst data transmission method are provided. By using the burst receiver resetting method and apparatus in the PON and the corresponding burst transmission method at an Optical Network Unit (ONU) burst transmission end, a Reach Extender (RE) does not need to unpack upstream burst bandwidth allocation information carried in downstream data.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: June 17, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jing Li, Dongning Feng, Dongyu Geng, Frank Effenberger
  • Patent number: 8744268
    Abstract: A GPON module comprises a housing and a circuit board disposed in the housing. The circuit board further includes ground lines that substantially isolate regions of the circuit board, an electro-optical interface for converting an inbound optical signal to an electrical signal and processing circuitry that is arranged to provide an electrical RF signal to an RF interface. The RF interface comprises a three-pin RF connector exposed from the housing, wherein the RF connector is coupled directly to the circuit board, and two of the three pins are coupled to ground.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: June 3, 2014
    Assignee: Emcore Corporation
    Inventors: Xiaoming Lou, Genzao Zhang, Eric Hufstedler, Leonel Gomez, Eva Peral
  • Patent number: 8712241
    Abstract: Methods and apparatus for providing enhanced optical networking service and performance which are particularly advantageous in terms of low cost and use of existing infrastructure, access control techniques, and components. In the exemplary embodiment, current widespread deployment and associated low cost of Ethernet-based systems are leveraged through use of an Ethernet CSMA/CD MAC in the optical domain on a passive optical network (PON) system. Additionally, local networking services are optionally provided to the network units on the PON since each local receiver can receive signals from all other users. An improved symmetric coupler arrangement provides the foregoing functionality at low cost. The improved system architecture also allows for fiber failure protection which is readily implemented at low cost and with minimal modification.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: April 29, 2014
    Assignee: Time Warner Cable Enterprises LLC
    Inventors: Jun Xu, Nanjian Qian
  • Patent number: 8712243
    Abstract: Systems and techniques for multiple bit rate optical data transmission. A passive optical network includes an optical line termination unit (OLT) connected to one or more optical network units (ONUs) by optical elements. The OLT is capable of performing downstream transmission to the ONUs at each of a variety of different bit rates, and each ONU performs upstream transmission at one or more bit rates. The OLT can sense a bit rate of a received transmission and change its operation so as to receive and process the transmission exhibiting the sensed bit rate. Each of the ONUs receives and processes downstream transmissions at one or more bit rates, but each ONU is capable of maintaining a phase and frequency lock to downstream transmissions at all bit rates supported by the OLT. One or more of the ONUs may also receive and process downstream transmissions exhibiting different or changed bit rates.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: April 29, 2014
    Assignee: Alcatel Lucent
    Inventors: Hungkei Keith Chow, Manyalibo Joseph Matthews, Dusan Suvakovic, Doutje T. Van Veen
  • Patent number: 8712244
    Abstract: In a communication system using a PON, time synchronization of a slave device such as a base station is realized with respect to a master device such as an L2SW or the base station. Time information acquired by a GPS satellite is corrected by ranging information of a discovery function of an OLT so as to be reflected on time information of each ONU. A propagation delay from the L2SW to the OLT is obtained with the use of a delay estimation mechanism, a propagation delay from the OLT to the ONU which is obtained by ranging is added to obtain a propagation delay from the L2SW to the ONU. The obtained propagation delay from the L2SW to the ONU is added to the transmitted time stamp value whereby a time stamp value received at a base station or femtocell side becomes a time into which the propagation delay to the ONU is incorporated, and absolute values of clock timers can be synchronized with each other.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: April 29, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Hasegawa, Kazuyori Umematsu, Tohru Kazawa, Atsushi Otani
  • 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: 8655169
    Abstract: Consistent with the present disclosure, based on system requirements or in response to an increase in optical signal-to-noise level of an optical channel, such as a WDM channel, additional FEC bits are inserted into and replace selected data payload bits in each frame carried by the channel. The replaced data payload bits may then be transmitted in subsequent frames on the same channel. As a result, the transmitted frames have a reduced data payload rate, but a higher coding gain. Alternatively, the replaced data payload bits may be included in frames transmitted on another optical channel. In that case, the frames carried by the two channels typically have the same bit length or number of bits and may thus be compliant with the frame length requirements of G.709, for example. Preferably, the number of coding bits may be changed dynamically to obtain different coding gains.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: February 18, 2014
    Assignee: Infinera Corporation
    Inventors: Drew D. Perkins, David F. Welch
  • 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: 8655166
    Abstract: A system and method for performing an in-service optical time domain reflectometry test, an in-service insertion loss test, and an in-service optical frequency domain reflectometry test using a same wavelength as the network communications for point-to-point or point-to-multipoint optical fiber networks while maintaining continuity of network communications are disclosed.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: February 18, 2014
    Inventors: Alexander I Soto, Walter G Soto
  • Patent number: 8639117
    Abstract: A dynamic bandwidth allocation apparatus of a passive optical network detects guarantee agreement information of each transmission container (T-CONT) queue of at least one optical network unit (ONU) that is connected to the dynamic bandwidth allocation apparatus in order to dynamically allocate a bandwidth is provided. The dynamic bandwidth allocation apparatus sets a queue threshold according to a buffer size of each T-CONT queue of at least one ONU, and calculates a service level agreement (SLA) parameter of at least one ONU using guarantee agreement information and a queue threshold. The dynamic bandwidth allocation apparatus allocates a bandwidth for every frame of each ONU using each SLA parameter of at least one ONU.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: January 28, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hark Yoo, Geun Yong Kim, Youngsuk Lee, Sung Chang Kim, Jong Deog Kim, Dongsoo Lee
  • Patent number: 8620157
    Abstract: In a passive optical network, upstream transmission frames from an ONU to an OLT can include additional delimiters that assist in overcoming high signal distortion at the beginning of the frame that can obscure an initial frame delimiter. The second delimiter can be inserted into the frame at various locations within the frame known to the OLT such that the OLT can active a delimiter detector at the beginning of a timing window for delimiter detection. The ONU can assist the OLT in synchronizing the frame by ensuring that a frame header immediately follows a second delimiter or appears at the start of a first FEC code block following the second delimiter. Depending on where the ONU inserts the second delimiter in the frame generation process, the second delimiter may be scrambled and/or may form part of the FEC.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: December 31, 2013
    Assignee: Alcatel Lucent
    Inventor: Dusan Suvakovic
  • Patent number: 8615595
    Abstract: A method comprises automatically determining whether a network device is local or remote to a client access device. If the network device is local to the client access device, the method comprises using a first access protocol to access the network device. If the network device is remote to the client access device, the method comprises using a second access protocol to access the network device.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: December 24, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: William G. McCollom, Michael J. Barber
  • Patent number: 8606109
    Abstract: A technique for forwarding downstream packets in a GPON comprising an OLT unit having a physical PON port connected to N Optical Network Termination (ONT) units by optical fibers. The physical PON port accommodates N individual virtual GEM ports terminated with the N ONT units (ONTs) which form N:1 service. The technique comprises assigning in the physical port of the OLT unit a virtual GEM port being a shared broadcast GEM port terminated with all the N ONTs of the N:1 service. Those downstream packets applied to the physical PON port, which would otherwise be flooded—such as broadcast packets or packets having unknown destination address—will now be forwarded only via the shared broadcast GEM port.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: December 10, 2013
    Assignee: ECI Telecom Ltd
    Inventor: Ido Ouzieli
  • Patent number: 8571422
    Abstract: A burst transmission method and a receiver resetting method and apparatus in a Passive Optical Network (PON) are provided. A burst receiver resetting method in a PON includes: receiving a preamble sequence and synchronizing data; after synchronizing the data, continuing to receive the data, and matching a Burst Terminator (BT); and resetting a receiver after successfully matching the BT. Meanwhile, an apparatus for implementing the method and a corresponding burst data transmission method are provided. By using the burst receiver resetting method and apparatus in the PON and the corresponding burst transmission method at an Optical Network Unit (ONU) burst transmission end, a Reach Extender (RE) does not need to unpack upstream burst bandwidth allocation information carried in downstream data. Therefore, the complexity of the implementation of the RE is reduced, and the method is simple and effective.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: October 29, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jing Li, Dongning Feng, Dongyu Geng, Frank Effenberger
  • Publication number: 20130279914
    Abstract: Apparatus and methods for providing content to devices in a content distribution network. In one embodiment, a hybrid fiber/coax network provides optical signals to an amplification and combination node, the signals which are converted to radio frequency (RF) signals and transmitted to a series of cascading amplification and combination apparatus. The converted signals are combined with legacy RF signals at the combination apparatus, and distributed further downstream to serviced premises as well as other portions of the network cascade. Time division techniques are used to mitigate interference between the various amplification and combination nodes within the cascade. The programmable time division devices allow for rapid spectrum reallocation, and for insertion of different content at each different node of the network.
    Type: Application
    Filed: April 19, 2012
    Publication date: October 24, 2013
    Inventor: Paul D. Brooks
  • Patent number: 8538258
    Abstract: In a TDMA optical network, a clock data recovery module uses signal oversampling and preamble correlation together with enhanced performance modules to extract additional data from the upstream transmission signal. Information including duty cycle, ONT power estimation, signal noise and jitter can be extracted from the upstream signal using digital logic and used to tune network components and/or alleviate network conditions.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: September 17, 2013
    Assignee: Alcatel Lucent
    Inventor: Dusan Suvakovic
  • Patent number: 8532491
    Abstract: A passive optical network system such that the power consumption can be reduced as much as possible according to the end-user traffic. An OLT uses the DBA function thereof and sequentially uses frequencies in ascending order of transmission rate in order to sequentially allocate bands to ONUs in ascending order of the requested bandwidth. At this time, a frequency to be allocated is selected so that the bandwidth allocated to each ONU is narrower than a maximum bandwidth through which transmission using the allocated wavelength is enabled. An OLT uses a grant area to specify the transmission timing of the secondary station and to inform the specified transmission timing to the secondary station. In addition, an area is set for storing information used to inform the secondary station of a new frequency to be used.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: September 10, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Norihiro Sakamoto, Tohru Kazawa, Yusuke Yajima, Akihiko Tsuchiya
  • Patent number: 8526816
    Abstract: An optical data bus transceiver (110), optical data bus system (100) and method (300) employ a disambiguation signal to resolve bit ambiguities in a summation signal on an optical data bus (104). The optical data bus transceiver includes a transmitter (112) connected to the optical bus and configured, in conjunction with another transmitter (112?, 120), to produce on the optical bus the summation signal during a first interval and the disambiguation signal during a second interval. The optical data bus transceiver further includes a receiver (114) configured to receive (310) the summation signal. The summation signal includes a summation of separate data signals from each of the transceiver transmitter (112) and the other transmitter (112?, 120). The disambiguation signal includes information to resolve bit ambiguities in the summation signal. A bit ambiguity results from a summation of data bits in each of the respective data signals during a symbol period of the first interval.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: September 3, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Raul H. Etkin, Erik Ordentlich, Michael Renne Ty Tan
  • Patent number: 8521033
    Abstract: In a passive optical network, power consumption of the ONU can be reduced by communicating a transmission schedule from the OLT to the ONU that indicates time slots in which the ONU is scheduled to receive payload transmissions from the OLT. Components of the ONU that would normally operate continuously, including processing payloads addressed to other ONUs, are placed in a reduced power state outside of the ONU's allocated time slots.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: August 27, 2013
    Assignee: Alcatel Lucent
    Inventor: Dusan Suvakovic
  • Patent number: 8488965
    Abstract: It is necessary to completely remove overlapping of signals between plural PONs in order to make the PONs coexist. Accordingly, it is required to share or intensively manage bandwidth use conditions over an optical fiber that serves as a common band between plural systems. Therefore, transmission clocks should be synchronized with high accuracy between plural systems. A reference clock is provided from an external device or a representative OLT to the entire systems to perform clock synchronization between plural systems, so that the overall systems are synchronized by synchronizing each OLT with the reference clock. A hierarchical management method is selected that manages ONUs under the control of each OLT by managing band use information arranged for each OLT with respect to an external device or a representative OLT for sharing of bandwidth use conditions between plural systems.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 16, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Mizutani, Toshiki Sugawara, Hiroki Ikeda
  • Patent number: 8406631
    Abstract: The subject matter disclosed herein relates to synchronizing network timing. In one particular example, network timing may be synchronized using reflected signals.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: March 26, 2013
    Assignee: Applied Optoelectronics, Inc.
    Inventor: Stefan J. Murry
  • Patent number: 8355629
    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: June 8, 2007
    Date of Patent: January 15, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Glenn Mark Mahony, Mounire El Houmaidi
  • Publication number: 20120237224
    Abstract: An optical data bus transceiver (110), optical data bus system (100) and method (300) employ a disambiguation signal to resolve bit ambiguities in a summation signal on an optical data bus (104). The optical data bus transceiver includes a transmitter (112) connected to the optical bus and configured, in conjunction with another transmitter (112?, 120), to produce on the optical bus the summation signal during a first interval and the disambiguation signal during a second interval. The optical data bus transceiver further includes a receiver (114) configured to receive (310) the summation signal. The summation signal includes a summation of separate data signals from each of the transceiver transmitter (112) and the other transmitter (112?, 120). The disambiguation signal includes information to resolve bit ambiguities in the summation signal. A bit ambiguity results from a summation of data bits in each of the respective data signals during a symbol period of the first interval.
    Type: Application
    Filed: October 29, 2009
    Publication date: September 20, 2012
    Inventors: Raul H. Etkin, Erik Ordentlich, Michael Renne Ty Tan
  • Patent number: 8249457
    Abstract: The invention presents a method and a device for bidirectional IR data transfer between a medical treatment table, particularly an operating table (10a to 10d), and an operator control device (12a to 12d) which are subscribers in the IR data transfer and which each comprise an IR transmitter and an IR receiver, where the data to be transferred by a subscriber (10a to 10d, 12a to 12d) are split into data blocks which are transmitted in succession, with a respective break being observed between the transmission of the individual data blocks, and where data from another subscriber are transmitted within the breaks.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: August 21, 2012
    Assignee: Maquet GmbH & Co. KG
    Inventors: Jürgen Ruch, Thomas Biehl
  • Patent number: 8244135
    Abstract: A system, method, and computer readable medium for increasing an upstream optical coding gain in a passive optical network (PON). In an exemplary embodiment of the invention, the system may include a memory structured to store Optical Network Terminator (ONT) burst timing values, and provide a previous burst timing value of the burst timing values to a translator. Further, an upstream burst grant timing scheduler may provide a scheduled timing value to the translator, wherein the translator may be structured to translate the previous burst timing value to a new expected timing value per an ONT upstream burst in association with the scheduled timing value. Also, a delimiter match and search block may be structured to use the new expected timing value to check a bit stream for a delimiter pattern match. An alarm counter may be provided in the system that is structured to provide an alarm when the delimiter pattern match is not found.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: August 14, 2012
    Assignee: Alcatel Lucent
    Inventors: James J Stiscia, Jihad Baghdadi
  • Patent number: 8233796
    Abstract: A timing interface module with daughter timing reference modules. The timing modules are provided in a rack platform to eliminate routing problems and which is compliant with all relevant industry standards. The timing reference module includes a face plate having first and second substantially rectangular openings, the face plate further comprising mounting slots for receiving mounting hardware therein and first and second timing modules, the first and second timing modules disposed within the first and second substantially rectangular openings. The first and second timing modules provide timing terminations for timing reference signals for network elements of a synchronized optical network.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: July 31, 2012
    Assignee: AT&T Intellectual Property I, L. P.
    Inventors: Stephen Culpepper, Jack C. Martin, Jr.
  • Patent number: 8224181
    Abstract: The invention relates to a protection device for removing signal interference in a passive optical network and to a corresponding passive optical network and to a method for removing signal interference in a passive optical network.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: July 17, 2012
    Assignee: Nokia Siemens Networks GmbH & Co. KG
    Inventors: Harald Rohde, Dominic Schupke
  • Patent number: 8218970
    Abstract: A medium access control method for optical-fiber TDMA networks is revealed. The TDMA indicates the technique of time-division multiple access which is used to provide medium-sharing environment. Once the MAC protocol implementing traffic control is applied to control access among nodes with the same optical fiber, the medium access in optical networks can be distributed logically and effectively among the nodes so as to improve unfair access in the optical TDMA networks. Therefore, the optical TDMA network is suitable to construct metropolitan area networks (MANs), local area networks (LANs) or subnetworks of public networks for reducing construction cost of networks, increasing bandwidth utilization and improving communicative performance.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: July 10, 2012
    Inventor: Rong-Nan Chiou
  • Patent number: 8190029
    Abstract: An object of the present invention is to increase the bandwidth use efficiency without requiring costly and fast integrated circuits or CPUs in the control unit even in a large-scale system with a large number of ONUs. An optical network unit includes an allocating unit that determines bandwidth allocation based on a predetermined allocation condition and a bandwidth transmitting unit that transmits bandwidth allocation information determined by the allocating unit to an optical line terminator. The optical line terminator is connected to a plurality of optical network units and includes a pipeline transmitting unit that transmits bandwidth allocation information transmitted from the optical network units to all optical network units to be allocated with bandwidth.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: May 29, 2012
    Assignee: NEC Corporation
    Inventor: Hirokazu Ozaki
  • Patent number: 8184974
    Abstract: A modular, scalable, extensible, In-Flight Entertainment (IFE) data communication system is described. In one embodiment, the system comprises a hub providing connection between one or more server/switch line replaceable unit including at least one server and a plurality of passenger video display units. A server, such as, for example, an audio server, a video server, an audio/video server, a game server, an application server, a file server, etc., provides data (e.g., entertainment programming, internet file data, etc.) to the video display unit. In one embodiment, the connection between the plurality of server/switch line replacement units, the hub and the plurality of video display units is provided by passive fiber optic links.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: May 22, 2012
    Assignee: Lumexis Corporation
    Inventor: James Douglas Cline