Matches 1 - 50 out of 113 1 2 3 >


Match Document Document Title
US20110058806 System and Method for Distributed Fault Sensing and Recovery  
A method and system for distributed fault sensing and recovery in a communication system. A master controller is provided in each cable station of the system. Each master controller receives local...
US20140161436 OPTICAL NETWORK FAILURE RECOVERY METHOD  
An optical network failure recovery method for a passive optical network is provided. The method includes steps of: obtaining at least one round-trip delay value according to an equalization delay...
US20110164872 FAST CONVERGENCE ON CHILD LINK FAILURES AND WEIGHTED LOAD BALANCING OF AGGREGATE ETHERNET/SONET BUNDLES  
A network device provides a selector list that includes indices of child nexthops associated with the network device, where each of the child nexthops is associated with a corresponding child link...
US20140056581 TIMER VALUE NEGOTIATION FOR PATH CONFIGURATION BASED ON RSVP-TE  
The present invention relates to an ingress node (102, 700) and methods therein for Operation Administration arid Maintenance, OAM related to Resource Reservation Protocol-Traffic Engineering,...
US20090317073 SYSTEMS AND METHODS FOR ETHERNET EXTENSION AND DEMARCATION  
The present invention provides Ethernet extension and demarcation functionality through a Multi-Source Agreement (MSA) pluggable transceiver in a customer or remote device. The pluggable...
US20130202285 SYSTEM AND METHOD FOR TRANSPORTING ELECTRIC POWER AND PROVIDING OPTICAL FIBER COMMUNICATIONS UNDER SEA WATER  
A network for transporting communication and power. The network comprises terminal stations branching units and subsea nodes connected to a branching unit, wherein at least one connection path...
US20130077959 DE-MAPPING METHOD AND DEVICE FOR OPTICAL TRANSPORT UNIT FRAME  
The disclosure discloses a de-mapping method and a device for an Optical Transport Unit (OTU) frame. The method includes: setting a receiving reference clock and a de-mapping path according to a...
US20110013903 OPTICAL COMMUNICATION  
A protected passive optical communications system (10), having a plurality of terminals (14), a main head end (22) for communicating with the terminals (14) in an operational state, and, a back up...
US20120294603 Method and System for Service Protection  
A method and system for service protection based on the Dual Node Interconnection (DNI) protection structure in the transport network are provided. When creating a DNI protection group, a...
US20120224845 ADMINISTRATIVE BOUNDARIES IN SINGLE OR MULTIPLE DOMAIN OPTICAL NETWORKS  
The present disclosure provides systems and methods for administrative boundaries in a single domain optical network such as emulation of an External network-network interface (ENNI) using an...
US20140050470 METHOD FOR RESIZING NETWORK CONNECTION IN THE OPTICAL TRANSPORT NETWORK SUPPORTING PROTECTION SWITCHING  
There is provided a method for resizing a network connection in an optical transport network that supports protection switching and receives a flexible Optical channel Data (ODUflex(GFP)) signal....
US20120315030 METHOD AND SYSTEM FOR REDUCING TRAFFIC DISTURBANCE IN A COMMUNICATION NETWORK CAUSED BY INTERMITTENT FAILURE  
A method may include: (i) in response to clearing of a fault on a working path of a protection switching group to which a first network element is interfaced: (a) transitioning, by the first...
US20110044683 FAST PROTECTION SCHEME FOR PASSIVE OPTICAL NETWORK  
The present invention relates to a method and devices for fast protection of an optical network system, in particular for a Passive Optical Network (PON), such as a Gigabit-capable Passive Optical...
US20140219648 Method for Protecting a PON From Photoreceiver Overload by an ONT  
A method and device are provided for protecting a passive optical network including an optical-line terminal connected to a plurality of optical network terminals grouped set-wise. The method...
US20100220994 Self-correcting wavelength collision avoidance system  
A method includes detecting wavelength collision including identifying a pair or pairs of ONTs that transmit the colliding wavelengths and recovering from collision wherein wavelengths of the pair...
US20120141115 APPARATUS AND METHOD FOR CLEARING A FAULT CONDITION OVER A FIBRE CHANNEL PATH  
A method for clearing a fault condition at a target device is disclosed herein. In selected embodiments, such a method includes detecting a fault condition at a target device and receiving N...
US20070058973 Optical termination system  
An optical termination system is provided. The optical termination system includes a working Optical Line Terminal (OLT) that communicates with a plurality of Optical Network Units (ONUs) near end...
US20090245781 APPARATUS AND METHOD FOR DETECTING TIMESLOT CONFLICT BETWEEN OPTICAL NETWORK UNITS IN OPTICAL COMMUNICATION NETWORK  
The objective of the present invention is to provide a solution for detecting timeslot conflict between Optical Network Units (ONUs) in an Optical Line Terminal (OLT). When all ONUs are...
US20130016964 METHOD AND SYSTEM FOR FAULT RECOVERY IN AN OPTICAL NETWORK  
A method of managing fault recovery in a trunk-branched OADM network may include determining that an optical power level over data channels of a first communications link between a first and a...
US20140093231 PROCEDURE, APPARATUS, SYSTEM, AND COMPUTER PROGRAM FOR NETWORK RECOVERY  
A procedure for recovering a communication network, and a system, apparatus, and computer program that operate in accordance with the procedure. The procedure comprises aggregating network related...
US20130230310 Self-Healing Repeater Node  
A device may include a component, a first switch, a repeater, and a second switch. The component may configure optical paths between ports. The component may comprise a first pair of optical ports...
US20090208200 SYNCHRONOUS OPTICAL SIGNAL GENERATING DEVICE AND SYNCHRONOUS OPTICAL SIGNAL GENERATING METHOD  
A synchronous optical signal generation device includes: an optical phase detector that compares the phase of a reference optical signal with a phase of an optical beat signal to generate a phase...
US20140205277 OPTICAL TRANSMITTER  
Disclosed is an optical transceiver 1 including a phase locked loop circuit 3a configured to receive a reference clock CL1 and remove a jitter component of the reference clock CL1; a second phase...
US20100067899 Standby restoration signaling for optical networks  
Systems and methods are described that provide a distributed restoration signaling protocol for shared mesh restoration with standbys for transparent optical networks.
US20110033180 Method and Appartus for Regulating Rogue Behavior in Optical Network Transmission Devices  
A method and apparatus for regulating rogue behavior in optical transmission devices. The apparatus, for example, may be implemented in one or more of the ONTs in a PON. The ONT includes an...
US20090052889 OPTICAL NETWORK TERMINAL BACKUP BATTERY CENTRALIZED MONITORING AND VOLTAGE ALERT  
An optical network terminal (ONT) battery backup unit (BBU) battery voltage alert system (BVAS). This alert is provided as a supplement to an audio alarm which sounds when the backup battery is...
US20140314400 MULTI-LAYER LINK MANAGEMENT DEVICE, MULTI-LAYER INTEGRATED NETWORK TRANSPORT SYSTEM, AND MULTI-LAYER LINK MANAGEMENT METHOD  
A multi-layer link management device, a multi-layer integrated network transport system, and a multi-layer link management method are provided. The multi-layer link management device according to...
US20050175339 Dynamic broadband optical equalizer  
Apparatus for correcting distortion on an optical transmission link carrying a multiplicity of optical transmission channels, the apparatus comprising: an adjustable optical equalizer, through...
US20110142437 Header error control protected ten gigabit passive optical network downstream frame synchronization pattern  
An apparatus comprising an optical line terminal (OLT) configured to couple to a plurality of optical network units (ONUs) and transmit a plurality of downstream frames to the ONUs, wherein each...
US20090245782 NETWORK CONNECTION DEVICE AND SIGNAL PROCESSING METHOD IN THE NETWORK CONNECTION DEVICE  
A network connection device for performing a process of transmitting and receiving a SONET/SDH frame includes a first protocol processor which processes a first network management protocol; a...
US20090154916 Method and Apparatus for GPON GEM Error Correction Implementation  
A method and a device of enhancing data integrity using hash function for data transmission over an optical network are disclosed. The device includes a hash circuit, a lookup circuit, a vector...
US20120087649 Method and system for instructing enabling/disabling forward error correction coding function  
The present invention discloses a method for instructing enabling/disabling Forward Error Correction (FEC) function. The method comprises: presetting an instruction identifier of an FEC status;...
US20090129770 LIGHT TRANSMISSION DEVICE AND METHOD OF SETTING LIGHT INPUT BREAK DETECTION THRESHOLD VALUE  
According to an aspect of an embodiment, in a light transmission device for switching a light transmission path for receiving an optical signal from a currently used system to a backup system when...
US20080152358 LIGHT RECEIVER  
A light receiver has a photoelectric conversion circuit which converts an input optical signal into an electrical signal, an electric amplifier which amplifies the electrical signal output from...
US20050226615 Phase-encoded optical code division multiple access  
A system and method for performing phase-encoded optical Code Division Multiple Access (CDMA). A transmitter encodes digital data onto a wavelength of an optical signal using a codeword, splits...
US20120033963 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...
US20090148158 OPTICAL SIGNAL QUALITY MONITORING APPARATUS  
The present invention relates to the quality monitoring of optical signals, which have different symbol rates and generated by different modulation schemes, used for example in a wavelength...
US20130209086 CLEARING A FAULT CONDITION OVER A FIBRE CHANNEL PATH  
A method for clearing a fault condition at a target device is disclosed herein. In selected embodiments, such a method includes detecting a fault condition at a target device and receiving N...
US20100098407 METHOD AND SYSTEM FOR PROTECTION SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORKS  
One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network...
US20110255858 Polarization Demultiplexing Using Independent Component Analysis  
Systems and methods of polarizaton demultiplexing are disclosed. One such method receives a transmitted polarization-multiplexed optical signal The polarization-multiplexed has multiple...
US20120087648 METHOD AND SYSTEM FOR PROTECTION SWITCHING  
A method is provided for protection switching in an optical network. The method may include communicating a switch request for initiation of protection switching in response to a determination...
US20070036541 Optical receiver with monitoring unit and a method for detecting consecutive identical state of optical signal  
The present invention provides an optical receiver that includes a monitoring unit with a function to prevent the unit from misjudging of the loss-of-signal state. In particular, the present...
US20110222846 SHARED PHOTONIC MESH  
A network element of an optical communications network. The network element comprises an electronic router for forwarding traffic between a set of client access ports and a plurality of I/O ports....
US20080226287 Method and Apparatus for Restoration of Operating Conditions of an Optical Ring Network Comprising a Plurality of Optical Amplifiers After a Break or Other Fault in the Ring Network  
A method and apparatus for restoration of operating conditions of a WDM optical ring network comprising a plurality of amplifiers linked together in a ring after a break or fault has occurred in...
US20120219282 OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD  
An optical transmission system transmits an optical signal of multi-level modulation. In a transmitter module, a data string in a specified frame is rearranged into a plurality of logical lanes. A...
US20120163794 LEVEL TRANSITION DETERMINATION CIRCUIT AND METHOD FOR USING THE SAME  
A level transition determination circuit includes a multi-phase clock generator, an oversampling unit, and a state detection circuit. The multi-phase clock generator is used for receiving an input...
US20090214198 OPTICAL TRANSMITTER  
A optical transmitter includes a light device provided a driving current and for emitting light on the bases of the driving current; a light measure for measuring an output light level of the...
US20100272430 SYSTEM AND METHOD FOR CONSECUTIVE IDENTICAL DIGIT REDUCTION  
In a data transmission network, such as a passive optical network, the consecutive identical digit (CID) handling requirements may be reduced by providing a CID monitoring module at the...
US20110008039 FORWARD ERROR CORRECTION (FEC) ENABLED PHOTONIC INTEGRATED CIRCUIT (PIC) CHIPS WITH MULTIPLE SIGNAL CHANNELS  
A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC...
US20100329666 THERMAL CHIRP COMPENSATION IN A CHIRP MANAGED LASER  
Thermal chirp compensation in a chirp managed laser. In one example embodiment, a method for thermal chirp compensation in a chirp managed laser (CML) includes several acts. First, a first bias...

Matches 1 - 50 out of 113 1 2 3 >