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Optical communications February patent applications/inventions, industry category 02/12

20120045199 - Method and apparatus for implementing trunk optical fiber protection in ethernet passive optical network (epon): The present invention provides a method and apparatus for implementing trunk optical fiber protection in EPON. According to the technical scheme of the present invention, activating an optical module at a master PON port, deactivating an optical module at a standby PON port, configuring a service for the master PON... Agent: Zte Corporation

20120045200 - Upgraded bandwidth map for ten gigabit passive optical network: An apparatus comprising an optical line terminal (OLT) configured to transmit a bandwidth map (BWmap) for a plurality of burst signals to be transmitted by a plurality of optical network units (ONUs), wherein the BWmap comprises a plurality of allocations, and wherein each allocation comprises a start time for the... Agent: Futurewei Technologies, Inc.

20120045202 - High speed bi-directional transceiver, circuits and devices therefor, and method(s) of using the same: The present disclosure relates to a high-speed and/or power-saving bi-directional transceiver. The transceiver generally includes a (burst) laser driver; an output power monitoring and indicating circuit; control logic (e.g., a microcontroller unit); bi-directional optics; a photodiode bias control circuit; a limiting amplifier; and a receiver optical power monitoring circuit. Optionally,... Agent:

20120045201 - Monitoring energy consumption in optical access networks: An optical access network (5) comprises optical network units (10) connected to a node (40). A monitoring unit (35) determines information indicative of energy consumption at the optical network unit (10) over a period of time. An optical network unit (10) can operate in operating states/modes which differ in their... Agent:

20120045204 - Network with a fast-switching optical core providing widely varying flow-rate allocations: Multiple switch planes, each having meshed bufferless switch units, connect source nodes to sink nodes to form a communications network. Each directed pair of source and sink nodes has a first-order path traversing a single switch unit in a corresponding switch plane and multiple second-order paths each traversing two switch... Agent:

20120045203 - System and method for determining non-fragmentation for communication of packets: A system and method for determining non-fragmentation for communication of data packets includes generating a plurality of packets and storing in a cell-list at least one cell-value indicating a transmission duration of at least one of the packets in units of cell-size, where the cell-size represents a fixed, predetermined time... Agent: Pmc Sierra Israel Ltd.

20120045205 - Method and apparatus for deriving parameters of optical paths in optical networks using two-wavelength otdr and a wavelength-dependent reflective element: A method of distinguishing a wavelength-dependent reflective element (HRD) from wavelength-independent events in an optical network, the reflective element (HRD) being highly-reflective at a first predetermined wavelength (λ1) and significantly less reflective at least one other predetermined wavelength (λ2), comprising the steps of: connecting the wavelength-dependent reflective element (HRD) to... Agent:

20120045206 - Multi-chassis router with multiplexed optical interconnects: A multi-chassis network device includes a plurality of nodes that operate as a single device within the network and a switch fabric that forwards data plane packets between the plurality of nodes. The switch fabric includes a set of multiplexed optical interconnects coupling the nodes. For example, a multi-chassis router... Agent: Juniper Networks, Inc.

20120045207 - Gigabit passive optical network transmission convergence extension for next generation access: An apparatus including a data framer and an optical transmitter. The data framer is used to frame a data stream into a plurality of frames, each of the frames includes a plurality of fields sized to align the frames with a word boundary greater than or equal to four bytes... Agent: Futurewei Technologies, Inc.

20120045208 - Coherent receiver: A coherent receiver 1 assigns a first transmission signal to first transmission polarization, assigns a second transmission signal to second transmission polarization, and receives a quadrature multiplexed signal formed by applying quadrature multiplexing to the first transmission polarization and the second transmission polarization. The coherent receiver includes a detection means... Agent:

20120045209 - Cost-effective multi-rate upstream for 10gepon based on high efficiency coding: Systems and methods are disclosed to provide an upstream rate between 1 Gbps and 10 Gbps in a cost effective manner in a 10GEPON. In an embodiment, an optical network unit (ONU) transmitter includes a burst transceiver and a physical layer (PHY) including a high performance digital to analog converter... Agent: Broadcom Corporation

20120045210 - Optical subscriber network: An optical subscriber network for power reduction is provided. The optical subscriber network may include an Optical Line Terminal (OLT) and an Optical Network Terminal (ONT). The OLT may manage a plurality of ONTs by classifying the plurality of ONTs into a sleep group, and may multicast a sleep allowance... Agent: Electronics And Telecommunications Research Institute

20120045211 - Signal transmission processing method and apparatus and distributed base station: A signal transmission processing method and apparatus and a distributed base station are provided according to the embodiments of the present invention. The distributed base station includes a Base Band Unit (BBU) and a Remote Radio Unit (RRU). A transmitting end connected to one of the BBU and the RRU... Agent: Huawei Technologies Co., Ltd.

20120045212 - Optical amplification device, communication system, and amplification method: According to an aspect of the invention, an amplification device includes an amplifier configured to amplify a signal light by inputting the signal light and an excitation light to a rare-earth doped amplification medium, a wavelength arrangement monitor configured to acquire wavelength arrangement information indicating a wavelength of the signal... Agent: Fujitsu Limited

20120045214 - Method and apparatus for burst mode clock and data recovery: Provided is an optical line terminator (OLT) to recover packet data and a clock from an optical signal including a silent interval. The OLT may receive packet data and a clock from at least one optical network unit (ONU). Even in a silent interval in which the at least one... Agent: Electronics And Telecommunications Research Institute

20120045213 - Time division multiplexing transmission system and method of controlling system of same: There is provided a time division multiplexing transmission system which is capable of increasing the transmission efficiency. The system comprises OLT 10 and ONUs 20 connected to the OLT on a point-to-multipoint basis. The OLT 10 comprises a transmission circuit 11 that transmits a signal to the ONUs 20, a... Agent: Furukawa Electric Co., Ltd.

20120045215 - Mobile terminal, server and communication method: Disclosed herein are a mobile terminal and server and a communication method. In an exemplary embodiment, a mobile terminal includes a light reception unit that receive visible light; a communication unit that performs communication using the visible light received by the light reception unit; and a control unit that controls... Agent: Pantech Co., Ltd.

20120045216 - Optical transceiver and packaging method thereof: An optical transceiver includes a substrate, a plurality of laser components, a bracket and a plurality of lenses. The substrate defines a plurality of through holes, a plurality of receiving grooves and at least two fixing holes. The laser components are received in the plurality of receiving grooves and installed... Agent: Ambit Microsystems (zhongshan) Ltd.

20120045217 - Drive circuit, optical transmission apparatus, driving method, and optical transmission method: A drive circuit includes a duty cycle adjusting circuit that changes the duty cycle of a first signal; and a calculating circuit that with respect to signals that include the first signal for which the duty cycle has been adjusted and a second signal having a phase and amplitude that... Agent: Fujitsu Limited

20120045218 - Driver and optical transmission apparatus: A driver for shaping a drive signal includes a pre-emphasis circuit, an offset adjustment circuit, and an amplifier. The pre-emphasis circuit symmetrically emphasizes a rising edge portion and a falling edge portion of the drive signal. The offset adjustment circuit applies a direct-current offset to the drive signal. The amplifier... Agent: Fujitsu Limited

20120045219 - Method and apparatus for optically transmitting data: In a method and an apparatus for the optical transmission of data by a pulse-width modulated light source (LED), in which a set dimming factor (N) is replaced with a cycle-dependent dimming factor (NI), the cycle-dependent dimming factor is modulated for encoding the data to be transmitted and corresponds to... Agent:

20120045220 - Multi channel encoder, demodulator, modulator and digital transmission device for digital video insertion in network edge applications: A multi-channel encoder, demodulator, modulator and transmission system for digital video insertion in network edge applications includes a circuit comprising slots for receiving a plurality of plug-in demodulator and encoder cards, a transmission stream multiplexer in communication with the slots, a QAM modulator in communication with the transmission stream modulator,... Agent:

20120045221 - Method and device for optically transmitting data: In a method for optically transmitting data by means of a pulse-width-modulated light source (LED), a pulse duty factor (N) of a pulse width modulation is specified to set the brightness of the light source (LED). A bright time (T) is divided into at least a first and second partial... Agent:

20120045222 - Method of operating an optical transmission system and optical transmission system: The invention relates to a method of operating an optical transmission system (100), wherein an optical signal (s, s1) is transmitted (200) through at least one component (102) of said optical transmission system (100) which exhibits spectral phase ripple, and wherein a phase of at least one frequency component of... Agent:

20120045223 - Driver and optical transmission apparatus: A driver circuit includes a plurality of delay circuits and an inverter. The plurality of delay circuits delay branched driving signals. The inverter inverts at least one of the branched driving signals. At least one of the plurality of delay circuits is at least one variable delay circuit delaying a... Agent: Fujitsu Limited

20120039597 - Fiber optic cross connect with non-intrusive monitoring and circuit tracer: A non-intrusive monitoring optical connection between two fiber optic lines including a sending fiber optic end that emits light to a first lens that collimates the light to a larger diameter parallel beam of light that enters a tunnel, a second lens that focuses the light from the tunnel to... Agent:

20120039598 - Method and apparatus for fault discovery in a passive optical network (pon): An apparatus and method for fault indication and localization in a Passive Optical Network (PON) comprising a multistage power splitter (100, 200, 300) with at least one 1:N splitter (120, 221, 222, 321, 322) followed by N items of 2:M splitters (131, 132, 231-233, 331-336), wherein N and M are... Agent: Telefonaktiebolaget L M Ericsson (publ)

20120039600 - Method and arrangement for identifying at least one object: The invention relates to a method and an arrangement for identifying at least one object, wherein the object has a connection unit that can be connected to a receptacle unit of a receptacle arrangement, wherein contactless information transfer takes place between the connection unit and the receptacle unit if the... Agent: Adc Gmbh

20120039599 - Method and system for tracking two communications participants of an optical satellite communications system: Method and system for tracking between two communications participants of an optical satellite communications system to provide a communication connection between the two communications participants. The method includes transmitting a signal from a first of the two communications participants to a second of the two communications participants, in which the... Agent: Astrium Gmbh

20120039601 - Use of polarization for differentiation of information: The present invention discloses a system for signalling within optical or combined optical/electronic networks wherein a first transmission node executes polarization multiplexing on transmitted traffic, and at one or more intermediate nodes one or more of the following processes are carried out on the sent traffic: demultiplexing by polarization and/or... Agent: Transpacket As

20120039602 - Method and apparatus for detecting rogue optical network unit in passive optical network: A method performed in an optical line terminal (OLT) in a passive optical network (PON) for detecting a rogue optical network unit (ONU) operating among a plurality of ONUs in the PON. The OLT receives a plurality of bursts of light from a plurality of ONUs, each burst being separated... Agent:

20120039603 - Method for data transmission using a linc amplifier, a linc amplifier, a transmitting device, a receiving device, and a communication network therefor: The invention concerns a method for transmission of a data signal from a transmitting device (BS) to a receiving device (RAH1) using a LINC amplifier (LINC1, LINC2) for signal amplification, wherein the data signal is represented by two phase modulated signal components of constant amplitude in a first part of... Agent:

20120039604 - Priority data transmission using fibre channel over ethernet: An apparatus, system, and method are disclosed for handling data being communicated over lossless Ethernet that is sensitive to delays. Fibre Channel over Ethernet (FCoE) is one example of an environment where data may be subject to unacceptable delays. The method involves designating certain data as low latency data that... Agent: International Business Machines Corporation

20120039605 - Wavelength division multiplexer compatible with two types of passive optical networks: A wavelength division multiplexer is provided by the present invention, which implements the wavelength division multiplexing and de-multiplexing of the optical signals in the basic and upgrade bands by reasonably arranging the filters and selecting the spectral properties of the filters, so that the existing time division multiplexing passive optical... Agent: Zte Corporation

20120039606 - Low power optical transceiver using orthogonal polarization detection technique: A method and apparatus for simultaneous processing of signals impressed on a horizontal polarization of a light wave and on a vertical polarization of the light wave is provided. In one embodiment, a horizontal polarization pilot tone is impressed on a data signal carried by the horizontal polarization and a... Agent: Ciena Corporation

20120039607 - Optical receiver, optical communication system using the same and equalization method in the optical communication system: An optical receiver according to the invention includes a polarization diversity unit receiving a polarization multiplexed optical signal obtained by multiplexing two optical signals having a same frequency band of carrier waves and polarization states orthogonal to each other, and a frequency domain equalization unit receiving signal components parallel to... Agent:

20120039609 - Method and apparatus for transporting client signals in an optical transport network: Method and apparatus for transporting client signals in an OTN are illustrated. In one embodiment, the method includes: receiving a client signal; determining a quantity of n-bit data units of the client signal based on a clock of the client signal and a local clock; mapping the quantity of n-bit... Agent: Huawei Technologies Co., Ltd.

20120039608 - Optical signal multiplexer card having front panel access to electrical and optical connectors for use in compact enclosure for optical signal multiplexer cards: A reduced size multiplexer and, in particular, a reduced size optical signal multiplexer module is provided for use in a reduced size enclosure. The optical signal multiplexer module has electrical and optical connectors on its faceplate to provide ease in access without having to remove the optical signal multiplexer from... Agent:

20120039611 - Communication system providing hybrid optical/wireless communications and related methods: A communication system includes at least one optical-wireless device coupled to a longitudinal side of an optical fiber. The optical-wireless device may include an optical fiber power unit for converting optical power into electrical power, and a wireless communication unit electrically powered by the optical fiber power unit. The optical-wireless... Agent: Harris Corporation

20120039610 - Deployable photonic link and interface module: A deployable photonic link including a deployable length of optical fiber and an interface module fusion spliced to at least one end of the optical fiber so that the module is directly connected to the fiber. The interface module including at least one of: an input for receiving a first... Agent:

20120039612 - Locating components in a data center: Embodiments of the invention include systems and method for determining the location of components in a data center. In one embodiment, a component locating system includes a lattice formed of interconnected hubs and rods. Each hub in the lattice computes its address relative to the address of a reference location,... Agent: International Business Machines Corporation

20120039613 - Method and apparatus for multi-zoned illumination: The present invention is directed to a multi-zoned lighting apparatus. In one embodiment, the multi-zoned lighting apparatus includes at least one circuit board, at least one control circuit coupled to the at least one circuit board and a plurality of light emitting diode (LED) groups coupled to the at least... Agent: Dialight Corporation

20120039614 - Optical communication module, and optical communication system in which optical communication module is used: The present invention provides an optical communication module which has an outer shape formed based on normal standards and which is able to communicate with a host-side circuit board, etc. to which it is fitted, via a predetermined communication interface; wherein the optical communication module exchanges input/output I/F information with... Agent: Furukawa Electric Co., Ltd.

20120039615 - Optical communication system using grounded coplanar waveguide: The invention discloses an optical communication system using grounded coplanar waveguide, comprising a current buffer and a transimpedance amplifier (TIA). Transmission lines of the optical communication system have grounded coplanar waveguide (GCPW) structures. The current buffer receives a current signal from a signal source, and outputs the current signal after... Agent:

20120039616 - System and method for administration of dispersion compensation modules: An optical network contains dispersion compensation modules with Fiber Bragg Gratings. A photo detector behind the Fiber Bragg Grating detects the not reflected rest of the gratings input signal and therefore the dispersion compensation modules input signal. This information is used to reduce the expenditure and to avoid errors of... Agent: Nokia Siemens Networks Oy

20120039617 - Photonic quantum system alignment using multiple beams: A handheld device (310) includes: a transmitter or receiver (410) of a signal beam (340) for quantum key distribution; and a source (412, 414) of alignment beams (312, 314, 316, 318) that diverge from each other in a pattern that matches sensors (322, 324, 326, 328) on a station (320)... Agent:

20120039618 - Self-adaptive receivers not requiring fec feedback: Optical communications networks rely on optical receivers to demodulate optical signals and convert the demodulated optical signal into an electrical signal. Optical receivers may be associated with one or more characteristics which can be made to vary during a transmission of an optical signal in order to improve the quality... Agent: Mintera Corporation

20120033963 - Optical subscriber terminating device, pon system, and abnormality detecting method: An ONU that receives a discovery gate transmitted by an OLT in a predetermined cycle, returns a response signal in response to the discovery gate, and receives a unicast frame transmitted to the ONU by the OLT having received the response signal, comprising: a received frame detecting unit that detects... Agent: Mitsubishi Electric Corporation

20120033964 - Method and apparatus for control of dpsk and dqpsk receivers and transmitters: An optical communication device such as a transmitter or receiver has a control loop for controlling relative phase of two related optical signals based on signal peak intensity. An optical transmitter measures the signal peak intensity of a combined optical signal representing two data channels to adjust relative phase as... Agent:

20120033965 - Method and apparatus for broadband carrier frequency and phase recovery in coherent optical system: A digital apparatus comprising a fast Fourier transform (FFT) module configured to transform a time domain optical signal into a frequency domain optical signal, a circular shifter coupled to the FFT module and configured to provide coarse frequency offset compensation to the frequency domain optical signal based on an estimated... Agent: Futurewei Technologies, Inc.

20120033966 - Optical leaky integrate-and-fire neuron: An optical system includes an optical integrator, a readout mechanism, and an optical thresholder. The optical integrator is configured to perform temporal integration of an optical input signal having a first wavelength received at an input. The readout mechanism is coupled to the optical integrator and provides optical signals having... Agent: Lockheed Martin Corporation

20120033967 - Method, system, and apparatus for transmitting ipv6 message in passive optical network: Embodiments of the present disclosure provide a method for transmitting an Internet Protocol version 6 (IPv6) message in a Passive Optical Network (PON). The method includes: receiving a Router Advertisement (RA) message comprising Optical Line Terminal (OLT) port information, Optical Network Unit (ONU) port information, and an IPv6 address prefix;... Agent: Huawei Technologies Co., Ltd.

20120033968 - Optical communications network node and method of controlling data transmission between optical communications network nodes: An optical communications network node (10) comprising an optical transmitter module (16), an optical receiver module (12), an electrical cross-point switch (20) and control apparatus (24, 26). The optical transmitter module (16) comprises optical sources (18) each having a different operating wavelength and each being selectively assignable as an optical... Agent: Telefonaktiebolaget Lm Ericsson (publ)

20120033969 - Wavelength path multiplexing and demultiplexing optical transmission apparatus: A sending apparatus includes: a wavelength path multiplexing part; a sending wavelength path selection part; and an optical transmitter having optical sending parts. The wavelength path multiplexing part includes: sending wavelength path demultiplexing ports; and sending wavelength multiplexing ports connected thereto. The sending wavelength path multiplexing ports are connected to... Agent: Nec Corporation

20120033970 - Path computation element method to support routing and wavelength assignment in wavelength switched optical networks: A network component comprising at least one processor configured to implement a method comprising transmitting a request to compute a routing assignment, a wavelength assignment, or both, wherein the request comprises a lightpath constraint indicator is disclosed. Also disclosed is an apparatus comprising a Path Computation Client (PCC) configured to... Agent: Futurewei Technologies, Inc.

20120033971 - Multi-network compatible data architecture: A backbone network, comprising a network switch configured to communicate data over Ethernet and SONET/SDH interfaces without encapsulating the data. Also disclosed is a backbone network, comprising a plurality of synchronized network switches, wherein the switches are configured to communicate a plurality of time division multiplexed data streams across at... Agent: Futurewei Technologies, Inc.

20120033972 - Hybrid orthogonal frequency division multiplexing time domain multiplexing passive optical network: An apparatus comprising a time domain multiplexing (TDM) to Orthogonal Frequency Division Multiplexing (OFDM) or bounded Quadrature Amplitude Modulation (QAM) channels HOT PON converter configured to couple to an optical line terminal (OLT) via an optical fiber and to a plurality of network terminals (NTs) via a point-to-multipoint coaxial cable... Agent: Futurewei Technologies, Inc.

20120033973 - Methods and systems for increasing reach and/or split in passive optical networks: Systems and methods according to these exemplary embodiments provide for methods and systems that allow for either reducing signal loss or improving the optical signal strength in a PON for increasing optical signal range.... Agent:

20120033974 - Optical communication system, optical communication apparatus, and optical communication method thereof: An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured... Agent: Nec Corporation

20120033975 - Apparatus and method for motor rotation control with an ir receiver: A method of controlling a television (TV) mount with a general-purpose remote controller. A signal of the remote controller is intercepted by an infrared ray (IR) receiver, and stored in an internal memory of the IR receiver so as to be used as a control signal of the TV mount.... Agent:

20120033976 - Optical communication module: Provided is an optical communication module including: a surface emitting element configured to convert an electrical signal into an optical signal and emit the optical signal; a lens provided at a predetermined distance from the surface emitting element in a direction along the center of an optical axis of the... Agent: Kabushiki Kaisha Toshiba

20120033978 - Optical memory expansion: Various embodiments of the present invention are directed to optical-based methods and expansion memory systems for disaggregating memory of computer systems. In one aspect, an expansion memory system comprises a first optical/electronic interface in electrical communication with a processor, a memory expansion board configured with memory, and a second optical/electronic... Agent:

20120033977 - Optical relaying r-type and gr-type receiver system: Some embodiments of R/GR type fire alarm control system according to the invention comprises a plurality of detectors/transmitters for issuing alarm signals, a plurality of fire safety equipments for operating under control signals, a plurality of optical repeaters and an R/GR type fire alarm control panel. The optical repeaters are... Agent:

20120033979 - Optoelectronic communications assembly having an electrical and optical interface: In one example embodiment, an optoelectronic communications assembly having an optical receiver or an optical transmitter includes an optical interface disposed at an end thereof and through which optical signals are communicated by the optical receiver or optical transmitter. The optoelectronic communications assembly also includes an electronic component and a... Agent: Finisar Corporation

20120033980 - Burst optical signal receiving device: A burst optical signal receiving device is provided, which includes an optical receiving component and a limiting amplifying circuit unit. The optical receiving component further includes a photodetector, a trans-impedance amplifier, a first direct current (DC) cancellation forbidding circuit, and a DC bias circuit, and the limiting amplifying circuit unit... Agent:

20120027401 - relating to signal processing: P

20120027400 - Fast optical receiver for unencoded data: The invention relates to a method and an optical receiver implementing this method suitable for robustly receiving unencoded optical data. The method set the threshold for the receiver using values relating to the high and low values of a binary signal. However, for some data patterns these values may not... Agent: Iptronics A/s

20120027402 - In-band optical frequency division reflectometry: An apparatus comprising an optical transmitter coupled to an optical fiber, and an optical receiver coupled to the optical fiber, wherein the transmitter is configured to transmit a test signal data pattern and user data into the optical fiber, and wherein the receiver is configured to receive a reflection of... Agent: Futurewei Technologies, Inc.

20120027403 - Communication clock transport method and device: A method and apparatus for timing an output signal based on timing of an input signal is provided. A method includes determining a first clock rate derived from the input signal during a first time interval measured by a reference clock. The method also includes signal processing logic to determine... Agent: Ciena Corporation

20120027405 - Method and apparatus for synchronizing time in a passive optical network: A method and apparatus for synchronizing time in a Gigabit Passive Optical Network (GPON) in which an Optical Line Terminal (OLT) sends a downstream frame including a Physical Control Block downstream (PCBd) field and a payload field to an Optical Network Unit (ONU); the OLT determines a time value associated... Agent: Huawei Technologies Co., Ltd.

20120027404 - Phase noise compensation in coherent optical communications systems: A method (10) of compensating phase noise in a coherent optical communications network. The method comprises: receiving a traffic sample (12); receiving an optical carrier and determining a phase noise estimate for the optical carrier (14); and removing the phase noise estimate from the traffic sample to form a phase... Agent: Telefonaktiebolaget L M Ericsson (publ)

20120027406 - Method and device for detecting dispersion, optical signal transmission system: The present invention discloses a method for detecting dispersion, overcoming disadvantages of complex configuration and insensitivity to a tiny dispersion of the method and device for detecting dispersion in the prior art. The inventive method includes: obtaining a signal within a predetermined bandwidth range from an optical signal received; obtaining... Agent: Huawei Technologies Co., Ltd.

20120027407 - Method and device for sending upstream transfer frame in passive optical network: The present disclosure relates to the Passive Optical Network (PON) technology, and a method for sending an upstream transfer frame in a PON is provided, so as to improve flexibility of a system and satisfy a requirement that an error probability is reduced as low as possible. The method includes:... Agent: Huawei Technologies Co., Ltd.

20120027408 - Directionless and colorless reconfigurable optical add/drop multiplexer: e

20120027409 - Femtocell-based mesh network with optical interconnect for 4-g multimedia communications: A network architecture for integrating a 4G wireless mesh network (WMN) with a 3-G network in order to effectively support multimedia communication is described. In one embodiment of the present invention, a wireless mesh network system comprises a plurality of routers each having a wireless optical interface; at least one... Agent:

20120027410 - Method, device and system for generating and receiving a phase polarization modulated signal: In the field of communications transmission, a method, a device, and a system for generating and receiving a phase polarization modulated signal are disclosed. The device for generating the phase polarization modulated signal includes: a Laser Diode (LD), a time division demultiplexer, a phase precoding module, a phase modulating module,... Agent: Huawei Technologies Co., Ltd.

20120027411 - Passive optical network user terminal and method of power supply control and power supply state reporting for the same: The present disclosure discloses a passive optical network (PON) user terminal comprising a passive optical network interface unit (PONIU) having access to a PON system, a service data distribution unit (SDDU) connected to the PONIU for distributing service data, a plurality of service processing units (SPUs) for receiving and accordingly... Agent: Huawei Technologies Co., Ltd.

20120027412 - Electronic compensation of nonlinearity in optical communication: In various embodiments, electronic apparatus, systems, and methods include electronic compensation of nonlinearity in optical communication. Additional apparatus, systems, and methods are disclosed.... Agent:

20120027413 - High-speed transmission system for optical channels: A method and apparatus for transmission of data on bandwidth limited fiber optic channels. A multilevel signaling alphabet having multiple levels of optical intensity are used to transmit signals on optical channels. In order to counteract the decrease in signal to noise ratio resulting from the use of a multilevel... Agent:

20120027414 - Transparent clocks in access networks: An apparatus comprising a device at an access node (AN) comprising an interface, a Precision Time Protocol (PTP) engine, and a timestamp module, and a second device at a customer premise node coupled to the AN and comprising a second interface, a second PTP engine, and a second timestamp module,... Agent: Futurewei Technologies, Inc.

20120027415 - Burst mode optical media converter with fast analog conversion: A media converter for interfacing an optical fiber bus to an electrical interface of an electronic device is described. The media converter includes an interface circuit configured to convert electrical signals received from a transmitting channel of the electrical device in a voltage doublet format to positive logic electrical pulses... Agent:

20120027416 - Network interface device for optical premises signals and networks: A network interface device (NID) demarcates an access network and a premises network. The NID receives a broadband signal via an access network and transmits optical device signals to pieces of premises equipment. The broadband signal may be a single-mode fiber (SMF) optical signal transmitted over an SMF cable. In... Agent: At&t Intellectual Property I, L.p.

20120027417 - Optical power divider: An optical power divider includes a body having a first side and a second side. The first side includes at least one cylindrical input lens and the second side includes an array of output lenses. The at least one cylindrical input lens is configured to expand input light along a... Agent:

20120027418 - Equalizer for an optical transmission system: An equaliser (60) processes, in the electrical domain, a signal obtained from a path of an optical transmission system. The equaliser comprises N cascaded stages (where N≧1). At least one of the stages comprises a cascade of a linear equalisation element (61) and a non-linear equalisation element (62). The equaliser... Agent: Telefonaktiebolaget Lm Ericsson (publ)

20120027419 - Frame/symbol synchronization in coherent optical ofdm: One aspect provides an optical communication system. The system includes an optical-to-digital converter, a frequency estimator and a symbol synchronizer. The optical-to-digital converter is configured to receive an optical OFDM bit stream including an OFDM symbol bearing payload data and a symbol header preceding the OFDM payload data. The frequency... Agent:

20120027420 - Method and apparatus for generating optical duo binary signals with frequency chirp: This present disclosure provides an optical transmission method and system. The system includes a pre-coder for pre-coding an input signal into a first pre-coded signal, an encoder/separator coupled to the first pre-coded signal and arranged to encode the first and second pre-coded signals into a first encoded signal with 0... Agent: Futurewei Technologies Inc.

20120027421 - Four wave mixing suppression: Methods, systems and computer program products for countering the effects of four wave mixing are described. In one implementation, a controller can be used to shift an operating wavelength of an optical transmitter away from a zero-dispersion wavelength through which signals of the optical transmitter are transmitted. The controller can... Agent: Harmonic Inc.