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| Number | Title | Issue Date |
| 8107819 | Systems and methods for interference prediction An optical network device of a passive optical network is introduced. The optical network device includes a light source, a control unit, and a variable optical attenuator. The light source can generate an optical signal. The control unit can generate a magnetic sig... | 01/31/2012 |
| 8081877 | Method of determining an optical distance for chromatic dispersion compensation A method of determining an optical distance between two nodes of an optical network for chromatic dispersion compensation includes using existing optical supervisory channel components in each node to measure the “time-of-flight” of an optical signal having a kn... | 12/20/2011 |
| 8059962 | Interleaving for 10G GPON An apparatus comprising a plurality of data framers, a time division multiplexer coupled to the data framers, and an optical transmitter coupled to the time division multiplexer. Also disclosed is an apparatus comprising an optical receiver, a time division demultip... | 11/15/2011 |
| 8050567 | System and method for transporting asynchronous ODUk signals over a synchronous interface System and methods are provided, in an Optical Transport Network (OTN), for communicating asynchronous Tributary Slots (TSs) via a synchronous Optical Payload Transport Unit of level k (OTUk) interface. The transmission method accepts a plurality of TSs at a corresp... | 11/01/2011 |
| 8000605 | Synchronous OTDM: gapped clock creation and duty cycle multiplication Methods and apparatus for implementing synchronous Optical Time Division Multiplexing are presented. Namely, a method of upconverting and combining N input NRZ optical data signals, each having an approximately equal pulse width and period, into one time-division mu... | 08/16/2011 |
| 8000606 | Method for processing overheads of optical communication system and signal processing device A method for processing overheads in an optical communication system and a signal processing device are disclosed. The method includes: in a receiving direction, conduct an O/E and S/P conversion for the received optical signal, extract overheads necessary for overh... | 08/16/2011 |
| 7885546 | Method and apparatus for transparent Ethernet multiplexing and demultiplexing A method and apparatus for multiplexing multiple Ethernet-based data streams in an optical network reduce the number of optical transceivers required by the optical network. Multiple data streams are multiplexed into a combined data stream, transmitted from a node i... | 02/08/2011 |
| 7869713 | Multiplexer with aptical add/drop A method of extracting a predetermined channel from an OTDM signal includes the steps of combining at the inlet of an SOA the OTDM signal and an impulsive signal with impulses temporally synchronized with the channel to be extracted to produce in the SOA FWM, XGM an... | 01/11/2011 |
| 7720385 | Device and method for provision of customized system for optical transmission of data Device and method for fiberoptic transmission for a plurality of different communication protocols. A single electronic card is adaptable to any of a plurality of communication protocol configurations designed by the user. ... | 05/18/2010 |
| 7672593 | OTDM transmission method and apparatus An OTDM transmitting method and transmitter realizing an OTDM distortion-free transmission substantially not relying upon dispersion. A time division multiplexed OTDM signal from an OTDM signal transmitter (1) enters an optical Fourier transform unit (2 | 03/02/2010 |
| 7668461 | Method for optimizing the optical power in an optical network and an optical network The invention relates to a method for optimizing the optical power in an optical network that has a plurality of network nodes each having a transmitter and a receiver. The method comprising generating an optical signal at a first network node, receiving the optical... | 02/23/2010 |
| 7639949 | TDM PON and dynamic bandwidth allocation method thereof A TDM PON including: an optical line terminal; a remote node including multiple secondary optical distributors connected to multiple optical network units; and the multiple optical network units generating and outputting a corresponding upstream optical signal. Each... | 12/29/2009 |
| 7596321 | Time division multiplexing of inter-system channel data streams for transmission across a network A time division multiplexing (TDM) facility is presented for time division multiplexing at least two inter-system channel (ISC) data streams to create a TDM multiplexed data stream. The TDM multiplexed data stream can be forwarded across the network over a single wa... | 09/29/2009 |
| 7574139 | Carrier-suppressed optical time domain multiplexing A method and an apparatus for implementing carrier suppressed data format on conventional OTDM modules is provided. Adaptive phase shifting of optical signals traversing one of the tributaries of an OTDM module is performed with feedback loop control. A tapped porti... | 08/11/2009 |
| 7428385 | Ethernet PON using time division multiplexing to converge broadcasting/video with data An Ethernet passive optical network provides a subscriber with a high speed and large capacity data service and a real time digital broadcast/video service. The network includes an optical line terminal for frame-multiplexing broadcast/video signals, which are obtai... | 09/23/2008 |
| 7412169 | FTTH system for convergence of broadcasting and communication through switched broadcasting A fiber to the home FTTH network for convergence of broadcasting and communication is disclosed. The network includes: an OLT for receiving and converting a first predetermined number of broadcast signals and an Ethernet signal into a plurality of converted optical ... | 08/12/2008 |
| 7409114 | Optical modulator An optical modulator using a thin plate including a portion having 20 μm or less thickness, capable of selecting a specific polarized wave from a light wave which propagates in an optical waveguide in the modulator without reduced productivity. The modulator includ... | 08/05/2008 |
| 7398021 | Optical transmitter and passive optical network using the same An optical transmitter including a multi-lambda source to output injection light consisting of a plurality of injection wavelengths in channels, a circulator having a first port, a second port, and a third port, the circulator receiving the injection light at the fi... | 07/08/2008 |
| 7394985 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 07/01/2008 |
| 7386236 | Multiple wavelength TDMA optical network A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther... | 06/10/2008 |
| 7372854 | Communication node system, control node system, and communication system using node systems in ethernet-passive optical network A communication node system for an Ethernet-PON includes: an LLID register for storing an LLID being an allocated identifier; a preamble generator for generating a PON preamble; a CRC generator for generating a CRC for the preamble; a transmission connector for comb... | 05/13/2008 |
| 7373084 | Optical network termination device for use in passive optical network based on WDM/SCM scheme A termination device for use in a WDM-SCM PON system can effectively support a multi-channel integration function of a WDM/SCM PON system. The termination device contained in a termination end of a WDM/SCM (Wavelength Division Multiplexing/Sub-Carrier Multiplexing) ... | 05/13/2008 |
| 7373430 | Cluster accelerator network interface with filter An apparatus for improving communication between network devices in a cluster. is provided. A filter is used to pre-process packets to determine if they need to be further processed by the processor of the network device. If true, the packets are presented on a bus ... | 05/13/2008 |
| 7369771 | Optical network terminator and optical network connection method using it An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical ... | 05/06/2008 |
| 7369769 | Ethernet passive optical network ring and its method of authorization and collision detection An Ethernet passive optical network (EPON) ring for providing protection against fiber failures. The optical network unit (ONU) is coupled to the ring fiber by a three-port passive optical splitting module that has three two-way optical passages. By the three two-wa... | 05/06/2008 |
| 7366950 | Information processing apparatus with resume function and information processing system An information processing apparatus having a resume function which can maintain the security even when a plurality of users commonly use the apparatus. A work state at a power-off time of the apparatus is preserved together with a work state name including a user's ... | 04/29/2008 |
| 7366417 | Delivering multicast services on a wavelength division multiplexed network using a configurable four-port wavelength selective crossbar switch A method and a system in which selected wavelengths of a wavelength division multiplexed (WDM) signal are modulated with multicast data for multicasting data services on an optical network. The WDM signal is received from a hub node of the optical network, such as a... | 04/29/2008 |
| 7356209 | Method and apparatus for optically powering and multiplexing distributed fiber optic sensors An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha... | 04/08/2008 |
| 7349630 | Hybrid WDM/TDM network architecture A method and apparatus for configuring a server/client network architecture. A server network device impresses an optical signal onto an optical link at a specified wavelength, where distinct wavelengths are associated with one or more of a plurality of client devic... | 03/25/2008 |
| 7340166 | Methods and apparatus for automated testing and analysis of dense wavelength division multiplexing (DWDM), wavelength selective and/or optical switching devices A system for performing testing and analysis of a DWDM optical switch in a computer controlled, automated manner for switches from multiple vendors is described. The introduction of automation of the testing configuration and the extensive use of protocol adaptation... | 03/04/2008 |
| 7340172 | Optical WDM-TDM network An optical WDM-TDM network includes a plurality of devices, each of the devices including at least one optical add/drop device adapted to drop optical signals of at least one channel of a plurality of received channels and pass through the remaining channels, at lea... | 03/04/2008 |
| 7330655 | WDM/SCM-PON and media access control method for asymmetric packet communication in the same The present invention relates to a WDM/SCM-PON and a media access control method for asymmetric packet communication in the same. In the WDM/SCM-PON, each SCM channel is classified and used as a link by adopting an SCM technique of subdividing a wavelength band of u... | 02/12/2008 |
| 7312909 | Method for synchronizing the phase of optical return-to-zero (RZ) data signals In order to synchronize the phases of two RZ data signals (RZS1, RZS2) combined to form a time multiplex signal (MS1), the power of half the fundamental made of the multiplex signal (MS1) is measured and the phase difference is controlled... | 12/25/2007 |
| 7310380 | Generic transmission parameter configuration A method of determining transmission parameters for a wireless transceiver is disclosed. According to the method, a state table is loaded into a transceiver. The state table includes a plurality of states, each of which has a set of transmission parameters associate... | 12/18/2007 |
| 7295785 | Receiver, electronic apparatus, and discharge lamp lighting apparatus A receiver includes a light-receiving portion which receives an infrared remote control signal from a transmitter, an A/D converter which converts a signal received by the light-receiving portion into a digital signal at a frequency much higher than a carrier wave, ... | 11/13/2007 |
| 7292605 | Communications system and communication method Communications system and communication method which control group communication processes in a more efficient and flexible way. A downstream frame generation means produces a downstream frame for group communication, providing group communication time slots therein... | 11/06/2007 |
| 7292785 | Optical transmission system constructing method and system An optical transmission system accomplishes optical transmission over a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the op... | 11/06/2007 |
| 7289501 | Method and apparatus for bandwidth-efficient multicast in ethernet passive optical networks One embodiment of the present invention provides a system that facilitates bandwidth-efficient multicast in EPONs. The system includes a central node and at least one remote node. Downstream data from the central node is broadcast through a passive optical coupler t... | 10/30/2007 |
| 7286538 | Method for checking multicast LLID transmission in ethernet passive optical network A method for checking whether a transmission is a multicast transmission or not is disclosed, which includes in an Ethernet passive optical network including an OLT and multiple ONUs connected to the OLT, checking whether a transmission is a multicast transmission o... | 10/23/2007 |
| 7283749 | Fiber and wire communication system This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communicati... | 10/16/2007 |
