Multiplex Patents (Class 398/43)
  • Patent number: 10419148
    Abstract: An optical node (100) is disclosed. The optical node (100) comprises first and second line ports (104, 106) for Wavelength Division Multiplexing (WDM) signals and first and second pluralities of local add/drop ports (108, 110) for optical signals. The optical node further comprises a wavelength selective switch (112), coupled between the first and second line ports (104, 106) and configured to drop optical signals from a WDM signal traversing the optical node between the first and second line ports (104, 106), and a node optical combiner (114) coupled between the first and second line ports (104, 106) and configured to add optical signals to a WDM signal traversing the optical node between the first and second line ports (104, 106).
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: September 17, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Giulio Bottari, Fabio Cavaliere, Francesco Testa
  • Patent number: 10404403
    Abstract: Free-space communication systems and methods are provided. The systems include a transmitter that combines multiple sets of radio-frequency-modulated optical carrier frequencies for transmission across free space using multiple transmission apertures. Different sets of signals are filtered to form single sideband signals. The different sets of single sideband signals are then combined to form dense wavelength division multiplexed signals. In addition, combined sets of signals of different polarizations can be combined. A receiver can include a single receive aperture.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: September 3, 2019
    Assignee: Ball Aerospace & Technologies Corp.
    Inventors: John R. Troeltzsch, Colin H. Wilson, Robert M. Pierce, Holden Chase, Brian Primeau, Robert Kaliski, Bevan D. Staple, Robert Marshalek
  • Patent number: 10397133
    Abstract: An upstream allocation circuit (14) and a downstream allocation circuit (15) are provided in an OLT (1). For example, a superimposed frame obtained by bundling upstream frames (upstream control frames+upstream data frames) from all ONUS is input to the upstream allocation circuit (14) via a frame reproduction circuit (12-1). The superimposed frame may be generated at the stage of optical signals or generated after converting optical signals into electrical signals. The upstream allocation circuit (14) allocates each of the upstream control frames bundled into the superimposed frame to a predetermined PON control circuit (13) based on information (PON port number or LLID) added to the frames. The downstream allocation circuit (15) allocates, to a preset frame reproduction circuit (12), each downstream control frames output from the PON control circuits (13).
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: August 27, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Saki Hatta, Tomoaki Kawamura, Kenji Kawai, Nobuyuki Tanaka, Satoshi Shigematsu, Namiko Ikeda, Shoko Ohteru, Junichi Kato
  • Patent number: 10382139
    Abstract: A method for optimizing reception of a polarized single-carrier transmission, including transmitting a polarized single-carrier transmission to a receiver, receiving feedback from the receiver of a figure of merit of the polarized single-carrier transmission, and electronically changing polarization of the polarized single-carrier transmission based on the feedback. A single-carrier communication transmitter including a source for a polarized single-carrier transmission signal, a circuit for receiving feedback from a receiver describing a figure of merit of a received polarized single-carrier transmission, and a circuit for changing polarization of the polarized single-carrier transmission signal, based on the feedback. Related apparatus, systems and methods are also described.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 13, 2019
    Assignee: Ceragon Networks Ltd.
    Inventors: Isaac Rosenhouse, Oz Harel, Haggai Mizrahi, David Heller, Gur Ballas
  • Patent number: 10341039
    Abstract: In some embodiments, an apparatus includes a reconfigurable optical add-drop multiplexer (ROADM). The ROADM has a wavelength selective switch (WSS) that does not perform power equalization when the WSS is operative. The ROADM also has a first pre-amplifier, a first channel power equalizer operatively coupled to the first pre-amplifier, a second pre-amplifier operatively coupled to the first channel power equalizer and the WSS, a first post-amplifier operatively coupled to the WSS, a second channel power equalizer operatively coupled to the first post-amplifier, and a second post-amplifier operative coupled to the second channel power equalizer.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: July 2, 2019
    Assignee: Juniper Networks, Inc.
    Inventor: Essam Tony Keddis
  • Patent number: 10274687
    Abstract: A highly integrated multi-channel optical transceiver module based on silicon photonic chip technology includes an integrated silicon photonic chip, an integrated circuit chip, and a printed circuit board assembly. The integrated silicon photonic chip and the integrated circuit chip are both integrated on silicon substrates and are furthered bonded on printed circuit board assembly. The integrated silicon photonic chip includes a silicon photonic transmitter chip and a silicon photonic receiver chip that both connected to optical fiber connectors through the optical fiber patch cord jumpers. The integrated circuit chip includes an integrated circuit transmitter chip that connected to the silicon photonic transmitter chip through a wire bonding, and an integrated circuit receiver chip that connected to the silicon photonic receiver chip through a wire bonding.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: April 30, 2019
    Assignees: Jiangsu Hengtong Optical Network Technology Co., Ltd., Jiangsu Hengtong Optic-Electric Co., Ltd.
    Inventors: Weiming Shi, Xiaohan Shen, Hu Xu, Quan Sun, Yinzhou Cai, Xiaojia Yang
  • Patent number: 10222547
    Abstract: A flame retardant optical fiber is provided. The flame retardant optical fiber includes a glass core, a cladding surrounding the glass core and a primary coating adhered to the cladding. The flame retardant optical fiber also includes a secondary coating surrounding the primary coating, wherein the secondary coating is formed from a coating composition that is substantially free of an oligomeric component and that comprises a flame retardant composition including a flame retardant material.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: March 5, 2019
    Assignee: CORNING INCORPORATED
    Inventors: Yangbin Chen, Emanuela Gallo, Manuela Ocampo
  • Patent number: 10211944
    Abstract: A station-side device performs transmission and reception of an optical signal to and from a subscriber-side device, and includes a communication control unit configured to perform optical signal communication using a plurality of wavelengths by wavelength division multiplexing and time division multiplexing; and a registration unit configured to set an acceptance period in at least one wavelength among the plurality of wavelengths, to perform a new registration of a subscriber-side device in response to a registration request of the subscriber-side device received within the acceptance period, and not to set the acceptance period in at least one other wavelength among the plurality of wavelengths.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: February 19, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Tomoaki Yoshida, Shigeru Kuwano
  • Patent number: 10164711
    Abstract: A scheme for generating asymmetric single sideband photonic vector signal at millimeter wave spectral region is described. At a transmitter, information bits to be transmitted are modulated using a vector modulation technique to generate a baseband signal. The baseband signal is converted into its single sideband (SSB) version using a complex frequency source having a first frequency. The real part of the upconverted signal is added to the real part of a second frequency source and is input as I component to an I/Q modulator. The imaginary part of the upconverted signal is added to the imaginary part of the second frequency source and is used as the Q component. The I/Q modulator is driven by a laser source at frequency fc. The resulting signal is transmitter over an optical transmission medium and upconverted by a single-ended photodiode to a desired radio-frequency (RF) carrier frequency.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: December 25, 2018
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Xinying Li, Hung-Chang Chien
  • Patent number: 10129016
    Abstract: A serializer circuit may include a recovery circuit, an adjusting circuit, and a multiplexer circuit. The recovery circuit may be configured to receive a first data signal at a first frequency, to generate a first clock signal at the first frequency using the first data signal, and to retime the first data signal based on the first clock signal to generate a retimed first data signal. The adjusting circuit may be configured to receive a second data signal and retime the second data signal based on the first clock signal to generate a retimed second data signal. The multiplexer circuit may be configured to multiplex the retimed first data signal and the retimed second data signal.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: November 13, 2018
    Assignee: FINISAR CORPORATION
    Inventors: The'Linh Nguyen, Daniel K. Case
  • Patent number: 10069276
    Abstract: A method to tune an emission wavelength of a wavelength tunable laser apparatus is disclosed. The laser apparatus implements, in addition to a wavelength tunable laser diode (t-LD) integrating with a semiconductor optical amplifier (SOA), a wavelength monitor including an etalon filter. The current emission wavelength is determined by a ratio of the magnitude of a filtered beam passing the etalon filter to a raw beam not passing the etalon filter. The method first sets the SOA in an absorbing mode to sense stray component disturbing the wavelength monitor, then correct the ratio of the beams by subtracting the contribution from the stray component.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: September 4, 2018
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventors: Hirokazu Tanaka, Tetsufumi Odagawa, Hiromitsu Kawamura, Masao Shibata
  • Patent number: 10033521
    Abstract: The present disclosure discloses a method for training time slot synchronization of nodes in an Optical Burst Transport Network (OBTN), a node device and a network. The method includes that: a node trains a reference time delay between receiving of a control frame and receiving of a data frame, wherein the data frame and the control frame are within one period; and the node trains a sending time slot between sending of adjacent data packets in the data frame.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: July 24, 2018
    Assignee: ZTE CORPORATION
    Inventors: Wei Lu, Yingchun Shang, Huilong Xia, Sheping Shi, Lei Wang
  • Patent number: 10009672
    Abstract: An optical transmission system and transmission method, an optical switching apparatus, and a control method are provided. Any data transmission apparatus included in an optical transmission system is configured to: transmit an optical label signal and a continuous data signal including an idle sequence and a data packet, and transmit the transmitted optical label signal to an optical switching apparatus, so that the optical switching apparatus builds, according to the optical label signal, a switching and transmission path for transmitting the continuous data signal transmitted by the any data transmission apparatus. This ensures that a data transmission apparatus transmits a continuous data signal, and also ensures that each optical receiving system can receive the continuous data signal. Therefore, no preamble needs to be added before a data packet carried in a to-be-processed data signal, thereby avoiding a resource waste and saving bandwidth resources.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: June 26, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Huixiao Ma, Xiaoling Yang, Shuaibing Li
  • Patent number: 9998213
    Abstract: A network tap with battery assisted and programmable failover is disclosed. The network tap includes a processing element, at least one optical-electrical transceiver, and at least one multiplexer/demultiplexer module. A backup battery provides power to the optical-electrical transceiver(s) and the multiplexer/demultiplexer module(s) but not the processing element when operating in a failover mode. The network tap is programmable to operate in a fail open mode in which traffic received from the network passes through the network tap during failover or a fail closed mode in which traffic receive from the network is blocked during failover.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 12, 2018
    Assignee: KEYSIGHT TECHNOLOGIES SINGAPORE (HOLDINGS) PTE. LTD.
    Inventors: Randy Fung, Marcel Felix Desdier, Ky Hong Le
  • Patent number: 9960856
    Abstract: A receiver is provided, including a signal acquiring unit, a signal diversity unit that is connected to the signal acquiring unit, a signal combination unit that is connected to the signal diversity unit, and a digital-signal acquiring unit that is connected to the signal combination unit. The receiver can receive a dual-polarization signal and can eliminate SSBI from the dual-polarization signal.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: May 1, 2018
    Assignee: Huawei Technologies Co., Ltd
    Inventors: Zhaohui Li, Xuebing Zhang, Huixiao Ma
  • Patent number: 9954645
    Abstract: A method and apparatus for providing a secure transmission based on a polar code are provided. A device generates an output bit sequence by applying a polar code generator matrix to an input bit sequence and transmits the output bit sequence to a target receiver. The input bit sequence includes first information bits, second information bits and third information bits. The first information bits correspond to gray bit channels for the target receiver and bad bit channels for an eavesdropper. The third information bits correspond to good bit channels for the target receiver and gray bit channels for the eavesdropper.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: April 24, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Joonkui Ahn, Ilmin Kim, Byounghoon Kim
  • Patent number: 9906357
    Abstract: An optical receiver includes a detector and frame synchronizer. The detector receives an optical OFDM bit stream having a plurality of frames. Each frame has an in-phase and quadrature phase component. Each component has an OFDM symbol-bearing data payload and a synchronization header. The synchronization header includes a single synchronization pulse. The frame synchronizer detects the synchronization header on each phase component. The frame synchronizer includes first and second pairs of digital comparators for each of the in-phase and quadrature phase components. The first and second pairs of digital comparators associated with each phase component establishes different and adjustable threshold windows that is symmetric about a zero amplitude of the synchronization pulse of the respective phase component.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: February 27, 2018
    Assignee: THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Stanley Johnson, Milorad Cvijetic
  • Patent number: 9838128
    Abstract: A system and method are presented for coupling OAM optical beams to optical fibers. The system may include, for instance, an OAM beam generator, for receiving one or more of a plurality of input signals, and generating a different OAM mode signal for each input signal. The OAM beam generator may further be operative to adjust a location and/or an exit angle of the one or more OAM mode signals before sending the one or more OAM mode signals to a beam combiner that combines the one or more OAM mode signals into a combined mode OAM transmission. The system may further include a controller in communication with at least one crosstalk estimate sensor and the at least one OAM beam generator, the controller operative to optimize the crosstalk estimate by receiving the crosstalk estimate for one of the OAM mode signals, and sending control instructions instructing the OAM beam generator to adjust a location and/or an exit angle of the one or more OAM mode signals to reduce the crosstalk estimate.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: December 5, 2017
    Assignee: Huawei Technologies Canada Co., Ltd.
    Inventors: Leslie Rusch, Irfan Muhammad Fazal, Karen Allahverdyan, Reza Mirzaei Nejad, Mohammad Mehdi Mansouri Rad
  • Patent number: 9791544
    Abstract: Disclosed are methods, systems, devices, apparatus, computer-/processor-readable media, and other implementations, including a method, at a processor-based mobile device, that includes determining a first set of candidate positions of the mobile device corresponding to a first time instance based, at least in part, on position data including a first set of identifiers decoded from signals including respective first one or more light-based communications received by the mobile device from a first one or more light devices, with the mobile device being located at a first location at the first time instance. The method further includes selecting at least one candidate position from the first set of candidate positions, in response to a determination that the first set of candidate positions includes more than one candidate position, in order to resolve positional ambiguity, based, at least partly, on further position data from further signals from one or more devices.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 17, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Aleksandar Jovicic, Hua Wang, Elizabeth Gene
  • Patent number: 9759660
    Abstract: A sensor assembly, a method, and a measuring system for capturing the distribution of at least one variable of an object are disclosed. The sensor assembly has at least one sensor element comprising at least one first sensor sub-element and at least one second sensor sub-element. The at least one first sensor sub-element is transparent for at least one wavelength region of light, the at least one second sensor sub-element is sensitive to at least one variable. Furthermore a method and measuring system and an illumination system for illuminating the sensor assembly and the object is provided.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: September 12, 2017
    Assignee: PreSens—Precision Sensing GmbH
    Inventor: Achim Stangelmayer
  • Patent number: 9755980
    Abstract: Embodiments of the present disclosure disclose a dynamic bandwidth scheduling method and device, and a computer storage medium. The method is applied to each node in an Optical Burst Transport ring-Network (OBTN) and includes that: when a target node serves as a master node, for each source node in the OBTN, when a timeslot is allocated for a connection from the source node to a certain destination node, a timeslot occupied by a destination node having the smallest hop count to a destination node configured currently is selected preferentially among timeslots in which there exists an Optical Burst (OB) where there has been no drop operation; and when the target node serves as a master node, a timeslot allocation result is converted into a bandwidth map and the bandwidth map is sent to each slave node in the OBTN.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: September 5, 2017
    Assignee: ZTE Corporation
    Inventors: Xue Chen, Shaoliang Luo, Hongxiang Guo, Xintian Hu, Gaofeng An
  • Patent number: 9736557
    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: April 4, 2016
    Date of Patent: August 15, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yi Lin, Xiaobing Zi
  • Patent number: 9693427
    Abstract: A control system for use in a network. The control system includes an input device coupled to the network to generate an input signal. The control system also includes an RGBW controller having a plurality of input channels and a plurality of output channels, and is coupled to the network. The RGBW receives the input signal at the input channels, determines if the input signal meets a predetermined condition, and generates a series of independent output signals at the plurality of output channels in response to the input signal meeting a predetermined condition. The control system also includes one or more output devices to receive one or more of the independent output signals, and to perform one or more functions in response to receiving one or more of the independent output signals.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: June 27, 2017
    Assignee: FIBAR GROUP S.A.
    Inventors: Maciej Fiedler, Bartlomiej Arcichowski, Adam Pudlowski
  • Patent number: 9647761
    Abstract: Flexible rate communication signalling apparatus and methods are disclosed. A determination is made as to a set of one or more of first frames and second frames which would provide a desired communication rate. The first frames and the second frames have a common frame structure but different associated rates. The determined set of one or more of the first frames and the second frames, including received client signals, is generated.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: May 9, 2017
    Assignee: INPHI CORPORATION
    Inventors: Jean-Michel Caia, Juan-Carlos Calderon, Arun Zarabi
  • Patent number: 9638865
    Abstract: The present invention provides a switch device for an optical signal which has high extendibility and which can suppress an increase of loss in extension. A switch device in one embodiment of the present invention includes, in a housing, four splitter portions, four switch portions, and extension splitter portions. The splitter portions are connected to path-side ports, the switch portions are connected to client-side ports, and the splitter portions and the switch portions are connected to one another via shuffle fiber arrays. One ends of the extension splitter portions are connected to path-side extension ports, and the other ends thereof are connected to client-side extension ports. The number of wavelengths processable by the switch device can be easily changed by changing a connection state of optical fibers to the path-side ports, the client-side ports, the path-side extension ports, and the client-side extension ports.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: May 2, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Junichi Hasegawa, Kazutaka Nara
  • Patent number: 9584227
    Abstract: System, methods and apparatus are described that facilitate transmission of data between two devices. A data transfer method includes receiving first data from a first interface, the first data being received in signaling transmitted by a first device according to a first protocol, determining a mode of operation for a communication link to be used for transmitting the first data to a second device, transmitting the first data to the second device over an optical path of the communication link in a first mode of operation, transmitting the first data in accordance with the first protocol to the second device over an electrical path of the communication link in a second mode of operation, and in a third mode of operation, translating the first data to obtain second data, and transmitting the second data in accordance with a second protocol to the second device over the electrical path.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: February 28, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: George Alan Wiley
  • Patent number: 9571196
    Abstract: An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 14, 2017
    Assignee: Politecnico do Milano
    Inventors: Paolo Martelli, Alberto Gatto, Mario Martinelli
  • Patent number: 9553690
    Abstract: The present disclosure discloses a method, wherein the method comprises generating a passive optical network (PON) protocol message, wherein the PON protocol message comprises an identifier of a PON user terminal and an action indication indicating that the PON user terminal intends to exercise a first power supply mode that is a power-saving mode. The present disclosure further provides a method for controlling the PON power supply and for reporting the power supply state. The present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup power source to supply power.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 24, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hai Gao, Yinghua Dong
  • Patent number: 9507113
    Abstract: An exemplary optical distribution frame includes a frame structure defining multiple positions into which multiple chassis can be inserted and a frame controller unit attached to the frame structure. The frame structure includes a frame controller and a switch communicatively coupled to the frame controller, wherein the switch includes a multiple ports. The frame structure including multiple cables, each cable being attached to a respective one of the ports of the switch and routed and attached to the optical distribution frame so that each cable can be attached to a chassis inserted into a predetermined one of the positions in the optical distribution frame, wherein the frame controller is configured to communicate port mapping information to a management entity that is communicatively coupled to the frame controller for use by the management entity in associating location information with a chassis inserted into the optical distribution frame.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: November 29, 2016
    Assignee: CommScope Technologies LLC
    Inventors: Jonathan T. Lawson, Joseph C. Coffey, John P. Anderson, Laxman R. Anne
  • Patent number: 9503211
    Abstract: A signal detection circuit includes: a first optical filter configured to filter an optical signal carrying a frequency modulated signal with a first transmission band; a second optical filter configured to filter the optical signal with a second transmission band; a first photo detector configured to convert the output light of the first optical filter into a first electrical signal; a second photo detector configured to convert the output light of the second optical filter into a second electrical signal; a difference circuit configured to output a signal representing a difference between the first electrical signal and the second electrical signal; and a detector configured to detect the frequency modulated signal based on the output signal of the difference circuit.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: November 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Kazuo Hironishi, Shoichiro Oda, Takeshi Hoshida
  • Patent number: 9496957
    Abstract: Embodiments of the present invention provide a method and an apparatus for allocating optical spectrum bandwidth resources. The method includes: first determine bandwidth of an OTUbase according to optical-layer frequency grid bandwidth and carrier spectrum efficiency; then construct an HO OTUflex according to bandwidth of customer service data and the bandwidth of the OTUbase, bandwidth of the HO OTUflex is a first integer multiple of the bandwidth of the OTUbase; map the customer service data into a payload area of the HO OTUflex and encapsulate overhead information; at last, modulate the HO OTUflex that carries the customer service data to a second integer number of optical channel carriers. The embodiments of the present invention apply to a scenario where customer service data is transported.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: November 15, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Wei Su, Chiwu Ding, Qiuyou Wu, Huaping Qing, Yao Shen, Hongli Jiang, Jianying Wei
  • Patent number: 9485554
    Abstract: Methods and systems for using modulation frequencies for optical channel monitoring with periodic optical filtering may allocate modulation frequencies based on bandwidth slices of an optical spectrum. The bandwidth slices may have an equal spectral band that is associated with a respectively unique modulation frequency. An optical carrier aligning with a bandwidth slice may be modulated using the modulation frequency assigned to that bandwidth slice. Additionally, the bandwidth slices may be used to determine a maximum frequency error of an optical carrier when received, such as from frequency drift during transmission.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: November 1, 2016
    Assignee: Fujitsu Limited
    Inventors: Inwoong Kim, Olga Vassilieva, Paparao Palacharla, Motoyoshi Sekiya
  • Patent number: 9432120
    Abstract: Embodiments provide systems and methods for a probabilistic reporting mode, where an Optical Network Unit (ONU) sends a REPORT message only when it has data to transmit. The absence of a REPORT message from an ONU is treated by the Optical Line Terminal (OLT) as indicating absence of data to transmit at the ONU. In another aspect, embodiments include systems and methods for an unsolicited burst mode, where an ONU can be configured to transmit data in the upstream in an unsolicited manner. The unsolicited burst mode includes mechanisms to ensure that no data is lost due to potential collisions between ONUs.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: August 30, 2016
    Assignee: Broadcom Corporation
    Inventors: Glen Kramer, Lowell D. Lamb
  • Patent number: 9391764
    Abstract: The invention relates to a method for synchronizing RF antenna signals (5a to 5i) of a plurality of RF antenna sites (3a to 3i) arranged at different locations of a radio transmission system (1b), the method comprising; generating a reference signal (7) in a reference oscillator (6) located at a central unit (2) of the radio transmission system (1b), transmitting the reference signal (7) as an optical signal from the central unit (2) to the RF antenna sites (3a to 3i) via a plurality of optical fiber links (9a? to 9i?), and using the transmitted reference signal (7) for synchronizing the RF antenna signals (5a to 5i) of the different RF antenna sites (3a to 3i), The invention also relates to a radio transmission system (1b).
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: July 12, 2016
    Assignee: Alcatel Lucent
    Inventors: Hans-Peter Mayer, Heinz Schlesinger
  • Patent number: 9374186
    Abstract: Example embodiments of the present invention relate to an optical node comprising of at least two optical degrees; a plurality of directionless add/drop ports; and at least one wavelength equalizing array, wherein the at least one wavelength equalizing array is used to both select wavelengths for each degree, and to perform directionless steering for the add/drop ports.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: June 21, 2016
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 9307303
    Abstract: The present invention discloses a method and system for communication. The method includes: according to a network resource and a signal type of a label switched path to be established, generating, by a first optical communication device, a label indicating that a first optical channel data unit is multiplexed to a second optical channel data unit, wherein the label comprises a tributary slot assignment indication field indicating a tributary slot occupied in the second optical channel data unit, and a length of the tributary slot assignment indication field is equal to the number of tributary slots of the second optical channel data unit; sending the label to a second optical communication device; obtaining, by the second optical communication device, the label; and multiplexing, by the second optical communication device, the first optical channel data unit to the second optical channel data unit based on the label.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: April 5, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yi Lin, Xiaobing Zi
  • Patent number: 9297960
    Abstract: A tunable multiport optical filter includes various types of arrays of optical ports. The tunable filter also includes a light dispersion element (e.g., a grating) and a reflective beam steering element (e.g., a tilting mirror). An optical signal exits an optical (input) port, is dispersed by the light dispersion element, reflects off the reflective beam steering element back to the light dispersion element, and on to another optical (output) port. The reflective beam steering element can be steered such that a wavelength portion of the dispersed optical signal can be coupled to the optical output port. For example, the input optical signal may be a wavelength division multiplexed signal carrying multiple channels on different wavelengths, and the tunable multiport optical filter directs one of the channels to the output optical port. Additionally, the tunable filter may be incorporated into a device acting as a wavelength reference.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: March 29, 2016
    Assignee: II-VI INCORPORATED
    Inventors: Massimo Martinelli, Mark H. Garrett, Ruipeng Sun, Mikhail I. Rudenko
  • Patent number: 9225432
    Abstract: Embodiments are provided for a novel multi-wavelength coherent receiver (MWCR) design and operation capable of detecting multiple optical wavelength channels. The embodiments include an optical receiver comprising a polarization-diversity optical hybrid module, a multiple wavelength local oscillator (MWLO) coupled to an input of the polarization-diversity optical hybrid module, a plurality of PIN diodes coupled to the polarization-diversity optical hybrid module, a plurality of analog-to-digital converters (ADCs) coupled to the PIN diodes, and a digital signal processing (DSP) module coupled to the ADCs. The polarization-diversity optical hybrid module splits an optical signal into multiple polarization components, wherein the optical signal includes multiple channels at multiple wavelengths. The MWLO locks the optical signal to the multiple wavelengths of the channels simultaneously.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: December 29, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Chen Chen, Zhuhong Zhang, Chuandong Li
  • Patent number: 9198123
    Abstract: A modem is disclosed, one embodiment including: first and second interface apparatuses; and a processing apparatus arranged to transmit a request message to part of a wireless cellular network to request establishment of a channel to access a packet-based network, wherein the request message requests the channel as being of a type that supports both a first and second version of a packet protocol; receive a response message indicating rejection of the request, and upon detecting that a field in the response message defines a reason other than the part of the wireless cellular network does not support first and second versions of the packet protocol on a single channel, to default to transmit a default request message to request establishment of a channel to access the packet-based network, the default request message requests the channel as being of a type that supports the first version of the packet protocol.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: November 24, 2015
    Assignee: Nvidia Corporation
    Inventors: Flavien Delorme, Bruno De Smet
  • Patent number: 9054830
    Abstract: A system for providing bi-directional RF services over a point-to-multipoint Passive Optical Network (PON). A system that can transport upstream RF signals generated by devices such as a set top box or a cable modem, through a passive Optical Network while simultaneously supporting downstream RF video and bi-directional base-band services on the PON.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: June 9, 2015
    Assignee: NorthPeak Enterprises, Inc.
    Inventors: Ketan Gadkari, Tom Werner
  • Publication number: 20150147056
    Abstract: An object is to provide an optical/wireless communication apparatus capable of communicating with counterpart apparatuses by selectively using optical communication and wireless communication according to the counterpart apparatuses to communicate with, and selecting an arbitrary path and an arbitrary frequency from a plurality of frequencies, and, furthermore, multiplexing signals as may be necessary. An optical/wireless communication apparatus (1) converts a plurality of input baseband signals into optical or electrical signals as may be necessary, modulating respective signals at different frequencies, multiplexing a predetermined number of optical modulated signals and a predetermined number of wireless modulated signals, and transmitting an optical multiplexed signal via a predetermined optical fiber (3 to 5) or a wireless multiplexed signal via a directional antenna (18) to a counterpart apparatus.
    Type: Application
    Filed: December 25, 2012
    Publication date: May 28, 2015
    Applicant: NEC CORPORATION
    Inventor: Takuya Itou
  • Patent number: 9042685
    Abstract: This invention concerns real-time multi-impairment signal performance monitoring. In particular it concerns an optical device, for instance a monolithic integrated photonics chip, comprising a waveguide having an input region to receive a signal for characterization, and a narrow band CW laser signal. A non-linear waveguide region to mix the two received signals. More than one output region, each equipped with bandpass filters that extract respective discrete frequency bands of the RF spectrum of the mixed signals. And, also comprising (slow) power detectors to output the extracted discrete frequency banded signals.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: May 26, 2015
    Assignee: The University of Sydney
    Inventors: Trung Duc Vo, William Peter Corcoran, Mark David Pelusi, David James Moss, Benjamin John Eggleton, Jochen Bernhard Schroeder
  • Patent number: 9042729
    Abstract: This invention relates to provisioning wavelength-selective switches and reconfigurable optical add-drop multiplexers to minimize the bandwidth narrowing effect from the optical filters. Novel architectures and methods are disclosed that can significantly reduce bandwidth-narrowing on channels in a reconfigurable WDM network where a large number of optical filter elements are cascaded. Instead of blocking unused channels as in the prior art, unused channels are selectively provisioned depending on the state of their adjacent channels. Unused adjacent channels of an active channel are provisioned to follow the same path as the active channels. As each channels is deployed, the channel frequency is selected so as to minimize bandwidth narrowing.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 26, 2015
    Assignee: TREQ LABS, INC.
    Inventors: Chris Wilhelm Barnard, Piotr Myslinski
  • Patent number: 9025954
    Abstract: An apparatus comprising a processor configured to obtain one or more plant conditions regarding at least one of a plurality of customer premises equipment (CPEs) remotely coupled to the apparatus via electrical lines, and divide the plurality of coupled CPEs into a number of profile groups based on the one or more plant conditions, wherein each profile group comprises at least one CPE and supports one or more modulation orders.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 5, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Liming Fang, Jim Chen, Li Zhang
  • Patent number: 9025960
    Abstract: A method implemented by a middlebox comprising registering a customer premises equipment (CPE) in the middlebox, wherein the CPE is coupled to the middlebox via an electrical line, and facilitating registration of the CPE in a central office (CO) equipment coupled to the middlebox.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 5, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Liming Fang, Jim Chen, Li Zhang
  • Patent number: 9020346
    Abstract: The present invention is directed to communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using PAM format(s) over optical communication networks. In certain embodiments, the communication interface is used by various devices within a spine-leaf network architecture, which allows large amount of data to be shared among servers.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: April 28, 2015
    Assignee: Inphi Corporation
    Inventor: Sudeep Bhoja
  • Patent number: 9014151
    Abstract: A method and apparatus for low-rate traffic signal transmission on Optical Transport Networks (OTN). The method includes: defining a frame format of the low-rate traffic optical channel data unit (ODU) signal for bearing the low-rate traffic signal; mapping the low-rate traffic signal to the low-rate traffic optical channel payload unit (OPU) of the low-rate traffic ODU signal, generating overhead bytes and filling the bytes in an overhead section of the low-rate traffic ODU to obtain the low-rate traffic ODU signal; multiplexing low-rate traffic ODU signals to an ODUk signal of which the rate matches the transmission rate rank of the OTN where the signal is transmitted, and transmitting the signal via the OTN. Based on this method, the invention provides an apparatus for the low-rate traffic signal transmission in the OTN as well. With this invention, the low-rate traffic signal transmission in the OTN can be implemented conveniently.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: April 21, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Shimin Zou
  • Patent number: 9014563
    Abstract: An apparatus is provided that includes n communication channels, and m communication media interfaces, and v virtual lanes. V is a positive integer multiple of the least common multiple of m and n. An information stream is transferred into data and alignment blocks striped across all of the v virtual lanes, the blocks being communicated from the virtual lanes onto the communication channels. The blocks are received on the communication channels. Each of the communication channels transmits a different portion of the blocks striped across all of the v virtual lanes. In more particular embodiments, v>=n>=m. The communication media interfaces can be electrical and optical. Each of the communication channels can include a SerDes interface operating at least 5 Gigabits per second. Furthermore, each of the m communication media interfaces is configured to transmit a different stream of information over a single optical fiber.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: April 21, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Mark A. Gustlin, Oded Trainin, Luca Della Chiesa
  • Patent number: 9014562
    Abstract: A wavelength division multiplexed optical communication system includes a plurality of optical line terminals which may be part of separate in service networks, each having a line interface and an all-optical pass-through interface including a plurality of pass-through optical ports, and each also including a plurality of local optical ports which are connectable to client equipment and an optical multiplexer/demultiplexer for multiplexing/demultiplexing optical wavelengths. The optical multiplexer/demultiplexer may include one or more stages for inputting/outputting individual wavelengths or bands of a predetermined number of wavelengths, or a combination of bands and individual wavelengths.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: April 21, 2015
    Assignee: Coriant Operations, Inc.
    Inventors: Ornan A. Gerstel, Rajiv Ramaswami
  • Patent number: 9002202
    Abstract: The present invention relates to a method and apparatus for reducing the resource utilization of the switching fabric in a SONET/SDH multiplexer by switching data on a TU level instead of byte or column level.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: April 7, 2015
    Assignee: Tejas Networks Limited
    Inventors: Prashant Prabhakar Dabholkar, Devendra Kumar Chaudhary