Class / Patent application number | Description | Number of patent applications / Date published |
398030000 | Using supervisory signal | 58 |
20080232797 | Method of Controlling Optical Amplifier Located Along an Optical Link - The invention concerns shutting down and restarting optical amplifiers, such as Raman amplifiers, in an optical link, depending whether the optical amplifier is a transmitting side amplifier or a receiving side amplifier. For controlling the amplifiers, at least one diagnostic signal is to be transmitted via an auxiliary optical channel in the optical link, and a number of physical events simultaneously taking place are to be taken into account to conclude whether to shut down or to restart one of the optical amplifiers. | 09-25-2008 |
20090238563 | Optical Signal Transmission Apparatus - There is provided an optical signal transmission apparatus having a stable dispersion compensation function without unnecessarily controlling a compensation value even when a main signal quality is deteriorated due to a factor other than dispersion or in the case of a transmission failure. When it is determined that a signal quality is deteriorated due to dispersion of a fiber by determining a control mode of a variable dispersion compensator by means of optical noise information and received power information in addition to bit error information of a received signal, a compensation value of the variable dispersion compensator is varied and a compensation value other than the dispersion of the optical fiber is held to an existing set value. | 09-24-2009 |
20090257745 | METHOD AND APPARATUS FOR TESTING TRANSMITTERS IN OPTICAL FIBER NETWORKS - An eye mask is provided that is defined at least partially in terms of absolute, or non-relative, optical power level values. In essence, the eye mask of the invention is a hybrid of the traditional eye mask in that the eye mask of the invention includes power level values on the optical power axis that are based on the minimum OMA set forth in the applicable standard or data sheet specification rather than on measured power level values obtained from the part being tested. Using the hybrid eye mask of the invention obviates the need to perform at least some of the tests often used to measure transmitter attributes. In addition, using the hybrid eye mask of the invention reduces the possibility that a transmitter may fail the eye mask test even though the transmitter operates satisfactorily. | 10-15-2009 |
20100247096 | Network Operating System With Topology Autodiscovery - The network operating system includes an embedded platform for controlling operation of an agile optical network at the physical layer level. At the module embedded level, each module (card-pack) is provided with an embedded controller EC that monitors and control operation of the optical modules. At the next level, each shelf is provided with a shelf processor SP that monitors and control operation of the ECs over a backplane network. All optical modules are connected over an optical trace channel to send/receive trace messages that can then be used to determine network connectivity. At the next, link management level, a network services controller NSC controls the SPs in a negotiated span of control, over a link network. The control is address-based; each NSC receives ranges of addresses for the entities in its control, and distributes these addresses to the SPs, which in turn distribute addresses to the ECs in their control. One of the SPs operates as a router on the link network to relay signaling and control to all entities based on their address. Each NSC constructs, from queried information, a network topology fragment for the embedded elements under its control. A distributed topology system (DTS) shares this topology information with neighboring NSC's to build a complete network view, which can be used by all interested network applications. | 09-30-2010 |
20110002688 | SYSTEM AND METHOD FOR IMPLEMENTING AN AUTOMATIC DISCOVERY FUNCTION IN A DWDM NETWORK - A system and method for implementing an automatic discovery function in a DWDM network are provided, wherein the system includes: an optical supervisory channel (OSC) being a bi-directional physical channel, configured to transmit information through multiplexing/de-multiplexing a wavelength independent of a master optical channel with the master optical channel; a first ASON control unit, being located in a first node, configured to interact with a second ASON control unit in an adjacent second node through the OSC channel so as to obtain the information of the second ASON control unit; and the second ASON control unit, being located in the second node, configured to interact with the first ASON control unit in the adjacent first node through the OSC channel so as to obtain the information of the first ASON control unit. Thereby, using the method and system of the present invention, the automatic discovery function can be implemented through the OSC channel transmission mechanism. | 01-06-2011 |
20110008041 | OPTICAL CROSS-CONNECT APPARATUS - The present invention relates to an optical cross-connect apparatus supporting plural directions, and provides a method of effectively performing an alarm indication by a node supervisory unit of the optical cross-connect apparatus. The node supervisory unit includes an alarm indication information storage unit that manages a management table for each of the plural directions. The management table manages not only received alarm indication information but also “internal WSS input/output port optical fiber connection state”, “WSS optical path setting state on DROP/THROUGH selection side”, “transponder destination location”, and “destination direction”, with respect to each direction. Then, a process flow is added to match received FDI information with the management information stored in the management table for each direction, and to specify an alarm destination. | 01-13-2011 |
20110019996 | METHODS AND APPARATUS FOR OPTICAL NETWORKS - A chromatic dispersion compensation system for an optical transmission system incorporates circuitry which determines the length of an optical fiber extending between an output amplifier and an input amplifier. Based on fiber type, the total chromatic dispersion on the fiber is determined. Compensation can then be automatically implemented. | 01-27-2011 |
20110076013 | METHOD FOR LOCALIZING AN OPTICAL NETWORK TERMINATION IN AN OPTICAL ACCESS NETWORK - A method for localizing an optical network termination in an optical access network including an optical line termination and a number of optical links. The method includes: detecting that the optical network termination is connected to an optical link and retrieving from it a termination identifier univocally identifying the optical network termination, using the termination identifier for retrieving an optical link identifier associated with the termination identifier and univocally identifying a given optical link of the optical links; inducing a change in an optical connection between the optical line termination and the given optical link, thus modifying an optical parameter of first optical signals received at the optical line termination through the given optical link; checking whether second optical signals received at the optical line termination from the optical network termination are affected by the change; and in the affirmative, determining that the optical network termination is connected to the first optical link. | 03-31-2011 |
20110176801 | TRANSMISSION UNIT, OPTICAL TRANSMISSION APPARATUS, COMMUNICATION CONTROL METHOD AND PROGRAM STORAGE MEDIUM - A transmission unit of this application includes a transmission unit, operating in one of modes including a normal communication mode and a connection confirmation mode, wherein the transmission unit transmits, in the normal communication mode, an OSC (Optical Supervisory Channel) signal with time average power beyond predetermined upper limit power; and wherein the transmission unit transmits, in the connection confirmation mode, the OSC signal with time average power lower than the upper limit power and with a transmission rate lower than a transmission rate in the normal communication mode. | 07-21-2011 |
20120163808 | DETECTING ROGUE ONU, OLT AND PON SYSTEM - A method and apparatus of detecting a rogue optical network unit (ONU) is provided. An optical line terminal (OLT) detects an abnormal upstream transmission to determine a plurality of rogue ONU candidates, and transmits a sleep allow message instructing a transition to a sleep mode to each of the plurality of rogue ONU candidates. The OLT detects the rogue ONU among the plurality of rogue ONU candidates based on upstream transmissions from the plurality of rogue ONU candidates in the sleep mode. Since the detection of the rogue ONU is performed in the sleep mode, the remaining ONUs can transition from the sleep mode to the normal mode after the detection of the rogue ONU is completed, thereby making it possible to rapidly resume upstream communication. | 06-28-2012 |
20120177366 | METHOD AND ARRANGEMENT FOR IN SERVICE RAMAN GAIN MEASUREMENT AND MONITORING - The invention refers a method and an arrangement for in service Raman gain measurements and monitoring of a wavelength division multiplex system. By measuring the power level values of a transmitted WDM signal (WMS_TX) and an optical supervisory signal (OSS_TX) at the transmitter and the power level values of the received signals (WMS_RX; OSS_RX) the Raman gain can be calculated for the different channels. | 07-12-2012 |
20140079390 | IN-BAND SUPERVISORY DATA MODULATION USING COMPLEMENTARY POWER MODULATION - According to an aspect of an embodiment, a method of modulating supervisory data onto an optical signal includes increasing a first power level of a first polarization component of an optical signal based on supervisory data. The method further includes decreasing a second power level of a second polarization component of the optical signal based on the supervisory data. The decrease in the second power level is substantially the same as the increase in the first power level such that a total power of the optical signal is substantially constant. | 03-20-2014 |
20140079391 | IN-BAND SUPERVISORY DATA MODULATION - According to an aspect of an embodiment, a method of modulating supervisory data onto an optical signal includes receiving supervisory data and adjusting a characteristic of a carrier of the optical signal for at least one of a first polarization component of the optical signal and a second polarization component of the optical signal based on the received supervisory data. The characteristic may be adjusted such that there is a relative difference between the characteristic for the first polarization component and the second polarization component. The relative difference of the characteristic between the first polarization component and the second polarization component may indicate the supervisory data. Alternately, the characteristic may be adjusted such that there is a change in a polarization orientation of the carrier on a Poincaré sphere that indicates the supervisory data. | 03-20-2014 |
20140341566 | SPEED TEST THROUGHPUT DISTRIBUTION - A method may include determining a total data demand distribution for a plurality of subscribers associated with a link between a gateway router (GWR) and an optical line terminal (OLT) in a network. The method also includes identifying a maximum link capacity of the link between the GWR and the OLT. The method further includes identifying a speed tier for which a speed test is to be executed, and determining a speed test throughput distribution based on the speed tier, the total data demand distribution and the maximum link capacity in an identified time interval. | 11-20-2014 |
20140341567 | COMPENSATION FOR AN OPTICAL SENSOR VIA A PRINTED CIRCUIT BOARD - Opto-electronic measuring arrangement which is largely independent of extraneous light, comprising emitted and compensation light sources, which emit light time-sequentially and in a phased manner, wherein the emitted light is phase-shifted respectively by 180°. An optical receiver receives the light emitted by the emitted light source and reflected by the object being measured together with the light from the compensation light source. The actuation signals for the emitted and compensation light sources are controlled such that the synchronous signal difference occurring in the receiver between the different phases is reduced to zero. The optical coupling between the compensation light source and the receiver diode occurs mainly via an optical system in a printed circuit board on which the compensation light source and the receiver are arranged. The printed circuit board itself, i.e. the FR4 component thereof, may constitute the optical conductor between the compensation light source and receiver diode. | 11-20-2014 |
20150010301 | Advertising Layer 0 Network Topology Information to a Layer 3 Network - In one embodiment, techniques are provided to generate a Border Gateway Protocol-Link State (BGP-LS) advertisement message comprising information configured to indicate topological information associated with a Layer 0 (L0) network, where the topological information includes information for connectivity within the L0 network that is available to a Layer 3 (L3) network. The advertisement message is sent to a node in the L3 network. The message sent from the L0 network is received at the node in the L3 network. The topological information in the message is analyzed in order to determine connections available to the L3 network, yet within the L0 network. A connection request is sent from the node in the L3 network to the L0 network and connections between the nodes in L3 network are established using available connections in the L0 network. | 01-08-2015 |
20150043907 | OPTICAL SUPERVISORY CHANNEL - A supervisory channel is provided on an optical path ( | 02-12-2015 |
398031000 | Different wavelengths for diagnostic and communication | 2 |
20090263125 | LIGHT MARK, METHOD AND DEVICE FOR LIGHT MARK MODULATION AND DEMODULATION - A light mark, a method and a device for light mark modulation and demodulation are disclosed. The modulation method includes: generating a mark with periodically alternating frequency and interval; and modulating the mark signal onto an optical signal. In the present disclosure, the mark with periodically alternating frequency and interval is adapted to distinguish different wavelengths by using different frequencies, and distinguish the same wavelength from different nodes by using the same frequency but different intervals. Therefore, numerous available marks are obtained with a small number of frequencies, and unique marks for all wavelengths in a network only require a number of frequencies equal to the number of the wavelengths in the network. Moreover, even if a wavelength conflict occurs, the wavelength conflict can be determined according to detected marks. | 10-22-2009 |
20150304743 | OPERATIONS ADMINISTRATION AND MANAGEMENT SERVICE FOR AN OPTICAL LAYER OF A COMMUNICATION NETWORK - We disclose a network element having one or more OAM components that enable the network element to send and receive in-band service messages without disrupting the flow of user data on the wavelength channel(s) used for the transmission of said in-band service messages. When deployed in a transport plane of a communications network, a plurality of such network elements can advantageously be used to perform various OAM functions that support a link-fault-management mechanism in a manner that complements and strengthens the existing OAM capabilities, particularly at various intermediate points within the optical network path(s). | 10-22-2015 |
398032000 | Pilot signal | 5 |
20090154922 | Pilot Tones for Optical Signal Wavelength Identification and Power Measurement - A method of optical communication includes providing a plurality of optical signals each associated with a distinct channel of a composite optical signal. A unique pilot tone signature is superimposed on each channel. The spectral composition of each signature includes a plurality of frequencies. In one embodiment, binary frequency shift keying at a frequency f | 06-18-2009 |
20090196603 | Method for lightpath monitoring in an optical routing network - A method and system for enabling lightpath monitoring in an optical network is disclosed. A single polarization modulator/scrambler introduces a pilot tone signal as an overlay on a plurality of optical signals on a source node and a performance monitoring unit detects the pilot tone signal to enable light path monitoring and identification through the optical network. | 08-06-2009 |
20130209093 | OPTICAL PATH ESTABLISHING METHOD AND OPTICAL NODE APPARATUS - An optical node apparatus that establishes an optical path between a first optical node and a second optical node in an optical network include a frequency modulation unit that superimposes a supervisory signal on a main signal by frequency-modulating the main signal, and a frequency demodulation unit that frequency-demodulates the supervisory signal superimposed on the received main signal. | 08-15-2013 |
20130251364 | METHOD FOR OPERATING AN OPTICAL TRANSMISSION SYSTEM - An optical transmission system method including generating for a tunable laser a pilot tone having an adjustable pilot tone frequency identifying a wavelength division multiplexing channel used by the tunable laser; multiplying the pilot tone with pilot tone data to provide a pilot tone data signal; supplying the pilot tone data signal and a high frequency data signal to the tunable laser generating an optical laser signal output by the tunable laser responsive to the supplied signals; transporting the optical laser signal to a central wavelength to locker; converting the received optical laser signal to provide a pilot tone data signal for wavelength division multiplexing channels demodulated to detect the pilot tone and the pilot tone data for each individual wavelength division multiplexing channel; and identifying the wavelength division multiplexing channel on the basis of the pilot tone frequency of the detected pilot tone and evaluating the pilot tone data. | 09-26-2013 |
20160013863 | APPARATUS FOR MONITORING OPTICAL SIGNAL TO NOISE RATIO, TRANSMITTER AND COMMUNICATION SYSTEM | 01-14-2016 |
398033000 | Monitoring | 34 |
20080267623 | Optical communication management systems - An optical medium, whether inside or outside an internet/telecommunications backbone, is managed using a management signal at a wavelength which is distinct from wavelengths of service signals. A multiplexer multiplexes the management signal onto the optical medium, after which a demultiplexer demultiplexes the management signal for analysis. Performance of customer channels may be inferred from performance of the management signal. | 10-30-2008 |
20080292312 | Method and apparatus for determining optical path attenuation between passive optical network nodes - A method and apparatus of determining attenuation of an optical path between two optical networks may include using a communications traffic signal without interrupting service or requiring additional external test equipment. A transmit optical network node is configured to measure the transmit power of a transmitted optical signal. A receive optical network node is configured to measure the transmit power of the same transmitted optical signal. A calculation unit calculates the power differential of a transmit and receive optical power. A determination unit is configured to determine optical path attenuation as a function of the optical path distance between the transmit and receive optical network nodes. A reporting unit reports data indicative of the optical path attenuation. The optical path attenuation may be monitored periodically, on demand, on an event basis and may report an alert if the attenuation measurement exceeds a preconfigured threshold. The data may be used to proactively monitor quality of an in-service passive optical network by determining the optical path attenuation. | 11-27-2008 |
20080317463 | Optical transmitter system - An optical transmitter system supplies a plurality of different wavelength optical radiation components to a transmission element which, in operation, is connected to the transmitter system for conveying the different wavelength radiation components to a respective receiver. The supply of the wavelength components is interrupted, preferably in response to a loss of the wavelength components at the respective receiver. A timer provides respective restart times which differ one to another for the wavelength radiation components. The supply of the wavelength components is restarted, following an interruption, at the respective restart times provided by the timer. | 12-25-2008 |
20090010644 | INTEGRATED OPTICAL COMMUNICATION AND RANGE FINDING SYSTEM AND APPLICATIONS THEREOF - The present invention is directed toward systems for conducting laser range and enabling optical communication between a plurality of entities and to the application of such systems in a secure covert combat identification system. In one embodiment, the present invention uses a novel laser system that generates high pulse rates, as required for optical communications, while concurrently generating sufficiently high power levels, as required by laser range finding operations. One application of the present invention is in enabling secure covert communications between a plurality of parties. Another application of the present invention is in tracking and identifying the movement of objects. | 01-08-2009 |
20090022490 | Method And Device For Data-Flow Protection Of Optical Interface In Data Communication Equipment - A method for data-flow protection of an optical interface in data communication equipment includes: receiving an optical-signal from a source-neighboring device, then duplicating the received optical signal into two duplicated optical signals. One of the optical signals is sent to a protected device for processing. According to the protected device working status, either the optical signal having been processed by the protected device or the second duplicated optical signal is selected and sent to a destination-neighboring device. The device includes a first optical-signal duplicating unit and an optical-signal selecting unit. The first optical-signal duplicating unit is used for duplicating an optical signal, and the optical-signal selecting unit is used as a selector. The method and device proposed by the disclosure are independent to network topology and can protect data-flow reliably. | 01-22-2009 |
20090034967 | PHASE MONITOR APPARATUS, PHASE CONTROL APPARATUS AND METHODS THEREOF FOR OPTICAL DQPSK RECEIVER - I branch is provided with a first interferometer, a first balanced optical detector, and a first data recovery circuit. Q branch is provided with a second interferometer, a second balanced optical detector and a second data recovery circuit. In I branch, a mixer multiples input signal of the first data recovery circuit with output signal of the second recovery circuit. An averaging circuit averages output signal of the mixer. In Q branch, a mixer multiples input signal of the second data recovery circuit with output signal of the first recovery circuit. An averaging circuit averages output signal of the mixer. A first phase control apparatus controls the phase of a phase shifter comprised in the first interferometer based on the output signal of the averaging circuit. A second phase control apparatus, in the same manner, controls the phase of a phase shifter comprised in the second interferometer. | 02-05-2009 |
20090142053 | INTEGRATED OPTICAL COMMUNICATION AND RANGE FINDING SYSTEM AND APPLICATION THEREOF - The present invention is directed toward systems for conducting laser range and enabling optical communication between a plurality of entities and to the application of such systems in a secure covert combat identification system. In one embodiment, the present invention uses a novel laser system that generates high pulse rates, as required for optical communications, while concurrently generating sufficiently high power levels, as required by laser range finding operations. One application of the present invention is in enabling secure covert communications between a plurality of parties. Another application of the present invention is in tracking and identifying the movement of objects. | 06-04-2009 |
20090190924 | Method and system for automatic feedback control for fine tuning a delay interferometer - A method for receiving an optical signal is included where an ingress signal is split into a first portion and a second portion. A relative delay is induced between the first portion and the second portion, which are optically interfered to generate at least one interfered signal. Quality criteria of a monitored signal at least based on the at least one interfered signal is monitored so that a relative delay based in the quality criteria may be adjusted. | 07-30-2009 |
20090190925 | Optical transmission apparatus - In an optical transmission apparatus, a unit includes a first connection section, a second connection section, a branching section, a first detection section, and a second detection section. The first connection section connects to a first component. The second connection section connects to a second component. The branching section is disposed at a preceding stage of the second connection section and outputs signal light to the first component through the first connection section. The first detection section determines whether the first component receives the signal light output from the branching section. The second detection section is disposed at a subsequent stage of the second connection section and detects the signal light. | 07-30-2009 |
20090202239 | Service Management Channel for Managing an Optical Networking Service - An optical network and method for managing a service across an optical network over a dedicated circuit between first and second service termination points include generating a service performance report message (PRM) at each service termination point. Each service PRM has service-specific information related to a performance of the service as determined by the service termination point generating that service PRM. Each service PRM identifies the service to which the service-specific information in that service PRM pertains. Each service termination point transmits the service PRM generated by that service termination point across the optical network over the dedicated circuit to the other service termination point through a service management channel of an optical transport facility. Either of the first and second service termination points is accessed to evaluate an end-to-end performance of the service based on a comparison of the service PRM generated by the first service termination point with the service PRM generated by the second service termination point. | 08-13-2009 |
20090214203 | Method and System for Automatic Feedback Control for Fine Tuning a Delay Interferometer - A method for receiving an optical signal is included where an ingress signal is split into a first portion and a second portion. A relative delay is induced between the first portion and the second portion, which are optically interfered to generate at least one interfered signal. Quality criteria of a monitored signal at least based on the at least one interfered signal is monitored so that a relative delay based in the quality criteria may be adjusted. | 08-27-2009 |
20090245788 | INTEGRATED OPTICAL COMMUNICATION AND RANGE FINDING SYSTEM AND APPLICATION THEREOF - The present invention is directed toward systems for conducting laser range and enabling optical communication between a plurality of entities and to the application of such systems in a secure covert combat identification system. In one embodiment, the present invention uses a novel laser system that generates high pulse rates, as required for optical communications, while concurrently generating sufficiently high power levels, as required by laser range finding operations. One application of the present invention is in enabling secure covert communications between a plurality of parties. Another application of the present invention is in tracking and identifying the movement of objects. | 10-01-2009 |
20090263126 | MONITORING THE PHYSICAL LAYER OF OPTOELECTRONIC MODULES - Monitoring the physical layer of optoelectronic modules in a storage area network (SAN). In one example embodiment, a method for monitoring the physical layer of optoelectronic modules in a storage area network includes various acts. First, diagnostic data is gathered from a plurality of optoelectronic modules. Next, the diagnostic data is automatically analyzed to determine that any of the plurality of optoelectronic modules is operating outside acceptable parameters. Finally, a solution is automatically formulated to bring the one or more malfunctioning optoelectronic modules back inside acceptable parameters. | 10-22-2009 |
20110194853 | METHOD AND DEVICE FOR MONITORING SUBMARINE CABLE SYSTEM - A method and a device for monitoring a cable system in the field of communications are provided. An optical signal emitted by an optical source to a transmission link of the cable system is divided into two paths of optical signals, in which one path of optical signals serve as local coherent light, and the other path of optical signals are transformed by multipath frequency shift to multiple paths of detection optical signals of different frequencies. A monitoring result is obtained by performing coherent detection, with the local coherent light, on the returned optical signals of the multiple paths of detection optical signals of different frequencies. The device includes an optical source, a multipath frequency shift module, and a coherency module. | 08-11-2011 |
20110211829 | SAFETY AND POWER CONTROL ARRANGEMENT AND METHOD FOR OPTICAL FIBER COMMUNICATION SYSTEMS - Safety and power control arrangement and method for optical communication apparatus, where a first circuit pack emitting an optical signal (OS | 09-01-2011 |
20120170929 | Apparatus And Method For Monitoring An Optical Coherent Network - An example method determines at an optical network monitoring device whether a value for at least one parameter that characterizes an optical signal which traverses a link of an optical coherent network is above a corresponding threshold and sets an alarm indicator when the value is larger than the corresponding threshold. The at least one corresponding parameter is at least one of polarization mode dispersion, polarization dependent loss and chromatic dispersion. An example method may obtains the optical signal from the link of the coherent optical network and determines the value for the at least one parameter, which may entail calculating the value based on the optical signal and filter coefficients of a filter that can be utilized to compensate the optical signal. In another embodiment, the value for the at least one parameter is received from a monitoring unit that determined the value from the optical signal | 07-05-2012 |
20120207469 | SPAN LOSS MONITORING SYSTEM, SUPERVISORY SIGNAL SENDING APPARATUS AND SUPERVISORY SIGNAL RECEIVING APPARATUS - A span loss monitoring system includes a supervisory signal sending apparatus with a output level monitoring section, a time stamp generation section, and a supervisory signal generation section that generates a supervisory signal including a pair of the output level measurement hour and the output level. The span loss monitoring system also includes a supervisory signal receiving apparatus with an input level monitoring section, a supervisory signal termination section and a span loss calculation section. | 08-16-2012 |
20120219288 | TRAFFIC DRIVEN VARIABLE BANDWIDTH OPTICAL TRANSMISSION - Link bandwidth is varied based on the subscriber traffic load. Varying the link bandwidth has the effect of varying the actual noise margin of the link (in an inverse elation), so that the noise margin will vary inversely with the traffic load. A beneficial result is that, because the noise margin is increased during “off-peak” traffic periods, rapidly varying and burst impairments can be absorbed without causing data loss. In effect, the respective probability distributions of error bursts and traffic load are separated. Data loss only becomes a significant risk when peaks in both distributions coincide. However, the probability of that event occurring is comparatively low. This enables a lower noise margin allocation during design of the link, which dramatically reduces the link cost. | 08-30-2012 |
20130202291 | DETERMINING ASYMMETRIES IN A COMMUNICATION NETWORK - A method for measuring asymmetry in propagation delay of first and second links which connect a first node to a second node of a communication network. The method comprises measuring ( | 08-08-2013 |
20130243423 | ETHERNET HUB AND METHOD OF USE - A new and improved Ethernet hub for providing visibility of data packet traffic in an Ethernet network is disclosed. The Ethernet hub includes a packet buffer being coupled with a plurality of network ports to enable full duplex data packet communications among connected network stations. | 09-19-2013 |
20130266312 | OPTICAL TRANSPORT NETWORK TRANSIENT MANAGEMENT SYSTEMS AND METHODS - An Optical Transport Network (OTN) transient management method, OTN node, and OTN network includes operating an OTN connection in a first mode in a network, the OTN connection traverses at least two nodes in the network, requesting a change in the OTN connection to a second mode which will cause a network transient, the change includes a timing change on the OTN connection affecting the at least two nodes, and performing transient management at the at least two nodes to mitigate the network transient, the transient management prevents spurious alarms due to the change between the first mode and the second mode. | 10-10-2013 |
20130294768 | OPTICAL LAYER MONITORING APPARATUS AND METHOD THEREOF - An optical layer monitoring apparatus and method thereof are provided. According to an embodiment of the present invention, an optical layer monitoring apparatus including an optical time domain reflectometer (OTDR) function so as to monitor an optical path of a passive optical network (PON), and a method for improving accuracy of measured monitoring results using the optical layer monitoring apparatus are provided. Therefore, it is possible to enable a user to continuously detect distortion or attenuation along the optical path, and to quickly recover from the distortion or attenuation along the optical path when distortion or attenuation is detected. | 11-07-2013 |
20130294769 | BIT ERROR GENERATION SYSTEM FOR OPTICAL NETWORKS - A bit error generating device includes a light source, an input device, and a control processor. The control processor includes logic configured to: receive protocol or bitrate information regarding a live traffic signal via the input device; determine bit error simulation signal parameters based on the received protocol or bitrate information; configure the light source to generate the bit error simulation signal based on the bit error simulation signal parameters; and instruct the light source to inject the bit error simulation signal into an optical fiber carrying the live traffic signal. | 11-07-2013 |
20130302030 | SYSTEM FOR LONG REACH XDSL OVER FIBER - System for connecting a plurality of digital subscribers to a data network, comprising a local part connected, by an optical fiber link, to a remote part. Said local part comprises a plurality of DSLAM line cards with xDSL over fiber transceiver that, in turn, comprise a plurality of xDSL lines comprising a modified analog front end which comprises an digital-analogue converter to transform a transmitted digital downstream signal into an analogue downstream signal; an oscillator which fixes an oscillation frequency for the xDSL line; a mixer, directly connected to the output to convert the analog downstream signal into the oscillation frequency; and a band pass filter centered at the oscillation frequency which filters the converted analog downstream signal. And in upstream direction: a band pass filter centered at the oscillation frequency which filters an analogue upstream signal; an oscillator which fixes an oscillation frequency for the xDSL line; a mixer, directly connected to the output of the band pass filter to convert the analogue downstream signal into the original frequency; a low pass filter to avoid aliasing; an analogue front end which comprises an analogue-digital converter to transform the converted analogue upstream signal into a digital upstream signal. | 11-14-2013 |
20140112659 | OLT AND FRAME TRANSFER CONTROL METHOD - In a control frame processing unit ( | 04-24-2014 |
20140219651 | Apparatus and Method for a Passive Optical Network - A passive optical network comprises a first node configured to transmit a downlink data signal over a communication channel of an optical link, the communication channel having a first wavelength, and a second node configured to transmit an uplink data signal over the optical link using the communication channel having the first wavelength. The first node and/or the second node is adapted to perform at least one monitoring measurement on the communication channel having the first wavelength, and provide monitoring information, comprising the at least one monitoring measurement, in a monitoring channel. Common public radio interface (CPRI) traffic can therefore be transported over an optical transport network (OTN), by using a frequency reuse technique to provide a symmetrical bi-directional communication link between a first node and a second node, and using a frame structure of the optical transport network to provide a monitoring channel. | 08-07-2014 |
20140241713 | Collecting Status From A Partner Management Domain - An apparatus comprising a Generic Status Portal (GSP) configured to grant access to a Managed Entity (ME) via an Optical Network Terminal (ONT) Management and Control Interface (OMCI), wherein the ME comprises status information about a non-OMCI management domain at the ONT. Also included is an apparatus comprising at least one processor configured to implement a method comprising initializing an ONT ME, adding status information associated with a managed function to the ONT ME, indicating a status information update of the ONT ME, and providing the status information via an OMCI. Included is a method comprising providing status and performance monitoring (PM) information from an ONT via an OMCI at the ONT, wherein the status and PM information is associated with at least one managed function instance of at least one non-OMCI domain. | 08-28-2014 |
20150030323 | SYSTEMS AND METHODS FOR DETECTING COMPONENT ROTATION WITHIN A COMMUNICATION ASSEMBLY - Systems and methods for detecting component rotation within a communication assembly are provided. In certain embodiments, a system includes a module; an adapter block that includes multiple front ports and multiple rear ports configured to receive an optical connector; a managing entity configured to control port identification for the front and rear ports; and a circuit board mounted to the adapter block, wherein the circuit board comprises multiple front contact assemblies and multiple rear contact assemblies, wherein each front port is associated with a front contact assembly and each rear port is associated with a rear contact assembly, wherein when a rear contact assembly is electrically coupled to a connector, the connector generates an event that is sent to the managing entity, whereupon the managing entity remaps the port identification for the front and rear ports. | 01-29-2015 |
20150086196 | TRANSPORT APPARATUS AND METHOD OF TRANSMITTING MONITORING CONTROL SIGNAL - A transport apparatus configured to transport a main signal received via one of a plurality of ports to any of the plurality of ports, the transport apparatus includes: a plurality of main signal processing circuits configured to extract a monitoring control signal from the main signal, the plurality of main signal processing circuits being provided to correspond to the plurality of ports, respectively; a monitoring controller configured to receive the monitoring control signal from the plurality of main signal processing circuits; and a serial interface configured to connect the plurality of main signal processing circuits with the monitoring controller on a ring-shaped bus to transfer a serial frame, wherein the serial frame has a mapping field to which the monitoring control signal is mapped. | 03-26-2015 |
20150117856 | SYSTEM AND METHOD FOR MONITORING POWER IMBALANCE INDUCED BY POLARIZATION-DEPENDENT LOSS - Systems and methods for monitoring a dual-polarization signal are disclosed. The systems and methods include extracting a portion of the dual-polarization signal, wherein the dual-polarization signal includes multiple supervisory signals, each associated with a polarization component of a main data signal, measuring a power level of the first and second supervisory signals, and determining a power imbalance between the polarization components of the main data signal based at least on the power level. | 04-30-2015 |
20150117857 | SYSTEM AND METHOD FOR IN-BAND AMPLITUDE-MODULATED SUPERVISORY SIGNALING FOR POLARIZATION-MULTIPLEXED SYSTEMS - Systems and method for monitoring a dual-polarization signal are disclosed. The systems and methods include adding a first supervisory signal to a first polarization component of the dual-polarization signal to get a first combined signal and adding a second supervisory signal to a second polarization component of the dual-polarization signal to get a second combined signal, either in the electrical or optical domain. The supervisory signal is arbitrary, non-complementary, and modulated at a amplitude substantially lower than the modulation frequency of the dual-polarization signal. The systems and methods further include analyzing the supervisory signal upon receipt. | 04-30-2015 |
20150125143 | SYSTEM AND METHOD FOR MONITORING POLARIZATION-DEPENDENT LOSS - Systems and method for monitoring a dual-polarization signal are disclosed. The systems and methods include adding a first supervisory signal to a first polarization component of the dual-polarization signal to get a first combined signal, adding a second supervisory signal to a second polarization component of the dual-polarization signal to get a second combined signal, and in the electrical domain, performing a polarization scanning technique on the first and second combined signals. | 05-07-2015 |
20150125144 | LOCATING A PHYSICAL CONNECTOR MODULE - Methods, systems, and computer readable media for locating a physical connector module are disclosed. According to one aspect, the subject matter described herein a method that includes selecting, via a locator beacon activation control function, a physical connector module to be located. The method further includes communicating, from the locator beacon activation control function, a locator beacon activation signal to a locator beacon activation client function included in the selected physical connector module and, in response to receiving the locator beacon activation signal at the locator beacon activation client function, triggering a transmission of a locator beacon from the selected physical connector module. | 05-07-2015 |
20160105341 | Determining Asymmetries in a Communication Network - A method for measuring asymmetry in propagation delay of first and second links which connect a first node to a second node of a communication network. The method comprises measuring ( | 04-14-2016 |