Patent application number | Description | Published |
20090003839 | Method, Apparatus and Data Carrier for Compensating for Channel Depletion of a Multi-Channel Signal in an Optical Link or Optical Network - A method and apparatus for compensating for channel depletion of a multi-channel signal in an optical link or optical network comprising a chain of optical amplifiers. The method comprises determining channel depletion for each amplifier from the power of the input signal to the optical amplifier and the power of the output signal from the previous amplifier. Each amplifier is then controlled to amplify the signal to a level equal to the nominal (ideal) power plus the calculated channel depletion for that amplifier. | 01-01-2009 |
20110020010 | SPECTRAL TILT COMPENSATION - A method of compensating for spectral tilt in an optical transmission system. The system comprises at least one span of optical waveguide for transmission of an optical signal and at least one optical amplifier for amplifying a power of the optical signal. The method comprises applying a predetermined spectral tilt to the optical signal to offset a spectral tilt effect dependent upon a property of the span(s) and independent of the optical signal power, and controlling the optical amplifier(s) to provide a gain tilt to offset a spectral tilt effect dependent upon a property of the optical signal. | 01-27-2011 |
20110058808 | Channel Power Estimation Means - A channel power estimator for estimating the power of each channel in a wavelength division multiplexed (WDM) signal, comprising filter means to select and output a sub-band of an incoming WDM signal, function application means to apply a weighting function at least once to the output from the filter means and then output the weighted signal to reconstruction means, storage means for storing optical characteristic data on at least the function application means, wherein the reconstruction means calculates an estimation of the power distribution of the incoming WDM signal using the weighted signal and the optical characteristic data. | 03-10-2011 |
20110255151 | Optical Network Amplifier Node and Method of Channel Power Depletion Compensation - A method of compensating for channel power depletion induced by Raman amplification noise in a hybrid distributed Raman amplifier-Erbium doped fibre amplifier. In the method, an equivalent noise figure is determined for a virtual amplifier equivalent to the hybrid distributed Raman amplifier-Erbium doped fibre amplifier, and having an input power equal to the input power of the Erbium doped fibre amplifier when the distributed Raman amplifier is off and an output power equal to the Erbium doped fibre amplifier output power. A compensation power, dependent at least in part upon the equivalent noise figure, is determined. A control signal is provided for controlling the hybrid amplifier such that an optical signal amplified by the hybrid amplifier has a total output power equal to a predetermined nominal output power plus the compensation power. | 10-20-2011 |
20110255861 | Method and Apparatus for Determining a Signal Transfer Characteristic Along a Light Path in an Optical Network - There is provided a method for determining a signal transfer characteristic along a light path between a first point and a second point in an optical network. The optical network comprises at least one optical element situated in the light path. The method comprises transmitting a plurality of optical test signals of different bandwidths from the first point along the light path. Each signal has a known bandwidth and a known power. The method further comprises receiving the optical test signals at the second point after they have travelled along the light path and measuring the power of each received optical test signal. The method also comprises determining the signal transfer characteristic along the light path from the power measurements. | 10-20-2011 |
20110318004 | TRANSMISSION AND ROUTING OF OPTICAL SIGNALS - Methods and apparatus for routing and transmission of inverse multiplexed signals over optical communications networks are described. A method for routing includes determining a plurality of paths for transmission of a plurality of inverse-multiplexed optical signals from a source node to a destination node of an optical network. Each path is for transmission of at least one of the inverse-multiplexed optical signals. A latency difference between a fastest one of said paths and a slowest one of said paths is less than a predetermined time period. | 12-29-2011 |
20120063775 | Setting Optical Power for an Optical Communications Network Channel - A method of determining a power correction factor for an optical power of an optical channel of a wavelength division multiplexed communications network. The method comprises configuring an optical source of the communications network to generate an unmodulated optical carrier signal for the optical channel. The method further comprises determining the optical power of the unmodulated optical carrier signal (P | 03-15-2012 |
20120114330 | MONITORING OPTICAL PARAMETERS OF A MODULATED OPTICAL SIGNAL - A method of monitoring optical parameters of a modulated optical signal comprises receiving a first optical power, X | 05-10-2012 |
20130039646 | Optical Monitoring in a Communications Network Element - A communications network element comprises an input to receive an input optical signal having an input spectral property and carrying input traffic, an output and a monitoring port. Optical signal processing apparatus to receive the input signal and to form an output optical signal having an output spectral property and carrying output traffic. An optical splitter to tap off a part of one of the input signal and the output signal to form a tapped signal having a respective one of the input spectral property and input traffic, and the output spectral property and output traffic. Optical signal transforming apparatus to receive the tapped signal and to apply an optical transfer function (OTF) to it to form an optical monitoring signal, and to provide the monitoring signal to the monitoring port. The OTF preserves the spectral property of the tapped signal and applies a time-domain obfuscation to the tapped signal. | 02-14-2013 |
20130294763 | Optical Signal Power Selection and Control | 11-07-2013 |
20140193148 | Node and Method For Iterative Improvement of Spectral Use - Example embodiments presented herein are directed towards an optical testing node, and method therein, for establishing transmission parameters for optical communications in an iterative manner. The establishment of the transmission parameters may comprise adjusting various parameters such as a modulation scheme, a light path length, and/or a spectral width. | 07-10-2014 |
20140219650 | NETWORK TRAFFIC MONITORING APPARATUS FOR MONITORING NETWORK TRAFFIC ON A NETWORK PATH AND A METHOD OF MONITORING NETWORK TRAFFIC ON A NETWORK PATH - A network traffic monitoring apparatus and method of monitoring network traffic on a network path is disclosed. The apparatus comprises a first path arranged to receive a portion of the network traffic from the network path and a monitoring port arranged to monitor the portion of network traffic. The apparatus further comprises a switch having an input port communicatively coupled to the first path, and an output port communicatively coupled to the monitoring port. The switch is arranged to selectively toggle between the first state in which the portion of network traffic can pass from the input port to the output port and a second state, in which the portion of network traffic is prevented from passing from the input port to the output port, in dependence of a switching signal. The apparatus further comprises a second path for communicating a monitoring status signal to a network device. | 08-07-2014 |
20150244493 | CHANGING THE SPECTRAL POSITION OF A LIGHTPATH - A method of changing the spectral position of a lightpath between a source node and a destination node of an optical network. The optical network uses a flexible grid for spectral allocation and the lightpath has been allocated first spectral resources at a first spectral position. The method comprises, at the source node, reserving additional spectral resources for the lightpath which are contiguous in frequency with the first spectral resources. The method comprises re-tuning a light source at the source node such that the lightpath moves in frequency from using the first spectral resources at the first spectral position to using second spectral resources at a second spectral position, wherein the second spectral resources comprise at least some of the additional spectral resources. The method comprises releasing at least some of the first spectral resources. The source node continues to send traffic over the lightpath during the re-tuning. | 08-27-2015 |
20150304035 | METHOD OF OPTIMIZING OPTICAL SIGNAL QUALITY IN AN OPTICAL COMMUNICATIONS LINK, OPTICAL NETWORK ELEMENT AND OPTICAL COMMUNICATIONS LINK - A method of optimizing optical signal quality in an optical communications link comprising a plurality of sections each comprising an optical amplification apparatus and an optical fibre span, the method comprising: for each section, determining a respective optimal optical channel power which minimizes a sum of an indication of a respective linear optical noise and an indication of a respective nonlinear optical noise; and generating and transmitting at least one control signal arranged to cause a target optical channel power of each section to be set to the respective optimal optical channel power. | 10-22-2015 |
20150318918 | Communication Network Element and Method of Mitigating an Optical Jamming Attack Against an Optical Communication System - A communication network element ( | 11-05-2015 |
Patent application number | Description | Published |
20120007663 | INTEGRATED CIRCUIT WITH DEVICE FOR ADJUSTMENT OF THE OPERATING PARAMETER VALUE OF AN ELECTRONIC CIRCUIT AND WITH THE SAME ELECTRONIC CIRCUIT - An integrated circuit includes an electronic circuit and a device for adjustment of the operating parameter value of the electronic circuit. The electronic circuit comprises a resistive stage. The device comprises a first circuit portion adapted to adjust said operating parameter when the device is active and the electronic circuit is inactive, and adapted to be inactive when the electronic circuit is active, and a second circuit portion adapted to determine the active or inactive state of the device in response to the value of an external control signal. The integrated circuit comprises a first external terminal for the connection to ground, a second external terminal for inputting said control signal, a further external terminal for inputting a further external signal and a deactivation circuit driven by said further external signal to deactivate the electronic circuit when the device is active. | 01-12-2012 |
20140291778 | INTEGRATED DEVICE OF A CAPACITIVE TYPE FOR DETECTING HUMIDITY, IN PARTICULAR MANUFACTURED USING A CMOS TECHNOLOGY - An integrated capacitive-type humidity sensor formed in a semiconductor chip integrating a sensing capacitor and a reference capacitor. Each of the sensing and reference capacitors have at least a first electrode and at least a second electrode, the first and second electrodes of each of the sensing and reference capacitors being arranged at distance and mutually insulated. A hygroscopic layer extends on the sensing and reference capacitors and a conductive shielding region extends on the reference capacitor but not on the sensing capacitor. | 10-02-2014 |
20150346025 | SEMICONDUCTOR INTEGRATED DEVICE FOR UV-INDEX DETECTION AND RELATED CALIBRATION SYSTEM AND METHOD - An integrated device for detection of the UV-index is provided with: a photodetector, which generates a detection quantity as a function of a detected UV radiation; and a processing stage, which is coupled to the photodetector and supplies at output a detected value of the UV-index, on the basis of the detection quantity. The processing stage processes the detection quantity on the basis of an adjustment factor, to supply at output the detected value of the UV-index and is further provided with an adjustment stage, coupled to the processing stage for adjusting the value of the adjustment factor. | 12-03-2015 |
20150377813 | SEMICONDUCTOR GAS SENSOR DEVICE AND MANUFACTURING METHOD THEREOF - A semiconductor gas sensor device includes a first cavity that is enclosed by opposing first and second semiconductor substrate slices. At least one conducting filament is provided to extend over the first cavity, and a passageway is provided to permit gas to enter the first cavity. The sensor device may further including a second cavity that is hermetically enclosed by the opposing first and second semiconductor substrate slices. At least one another conducting filament is provided to extend over the second cavity. | 12-31-2015 |
20160003757 | GAS MEASUREMENT DEVICE AND MEASUREMENT METHOD THEREOF - A gas measurement device measures gas using a gas sensor including a sense resistance exposed to the gas and a reference resistance not exposed to the gas. The gas measurement device applies a first current value and a second current value to the sensor. A detector functions to detect a first resistance variation and a second resistance variation of the sense resistance exposed to the gas with respect to the reference resistance as a function of the first current value and the second current value, respectively. The resistance variation dependent on relative humidity is then determined as a function of the first and second resistance variations and a first constant. The resistance variation dependent on gas content is then determined as a function of the first and second resistance variations and a second (different) constant. | 01-07-2016 |
Patent application number | Description | Published |
20150031390 | METHOD FOR LOCALISATION AND MAPPING OF PEDESTRIANS OR ROBOTS USING WIRELESS ACCESS POINTS - The method for localisation and mapping of pedestrians or robots using Wireless Access Points comprises the following steps: Wireless Signal Strength and/or time delay measurements from wireless access points (e.g. Wireless Local Area Network access points (WLAN, Wifi, WIMAX), or mobile radio base stations (e.g. GSM, UMTS, LTE, 4G, IS95 or RFID tags or transmitters) are taken at regular or irregular time instances by a device carried by the pedestrian or robot in addition to odometry measurements (e.g. human step measurements, human pedestrian dead-reckoning, robot or wheelchair wheel counter measurements, robot motor or wheelchair motor control inputs), and providing a particle filter which has a state model that comprises the pedestrian or robot location history for each particle, and also the location probability distribution of one or more wireless access points, wherein at each time-step of the particle filter each particle of the particle filter is weighted and/or propagated according to the odometry measurements and weighted and/or propagated according to the wireless measurement, wherein at each time-step of the particle filter the location probability distribution of the wireless access points for each particle is updated according to the measurement and the previous location probability distribution of that particle, and wherein the location of the pedestrian or robot and/or the map of the wireless access point(s) is extracted from the particle population (e.g. from the state of the particle with greatest weight, from the weighted state across all particles, from the state of a randomly chosen particle, from the state of the maximum likelihood particle). | 01-29-2015 |
Patent application number | Description | Published |
20090320577 | METHOD FOR DETECTING FAULTS IN THE AIR SYSTEM OF INTERNAL COMBUSTION ENGINES - A method for detecting faults in an air system of an internal combustion engine having an intake manifold and an exhaust manifold includes, but is not limited to the steps of measuring an oxygen concentration of the gas flowing in the exhaust manifold, estimating an intake oxygen control value in the intake manifold and estimating an intake oxygen reference value in the intake manifold based on said oxygen concentration of the gas flowing in the exhaust manifold. The method further includes, but is not limited to the steps of calculating an intake deviation value as a difference between the intake oxygen control value and the intake oxygen reference value and verifying if the intake deviation value is greater than a predetermined first threshold. Besides, the method includes, but is not limited to the steps of estimating an exhaust oxygen control value in the exhaust manifold, calculating an exhaust deviation value a difference between the exhaust oxygen control value and the oxygen concentration of the gas flowing in the exhaust manifold and verifying if the exhaust deviation value is greater than a predetermined second threshold. The method further includes, but is not limited to the steps of determining an exhaust oxygen concentration setpoint indicative of the oxygen concentration in the exhaust manifold, calculating a fresh airflow setpoint as a function of said exhaust oxygen concentration setpoint, measuring a fresh air mass flow value and calculating ( | 12-31-2009 |
20110209682 | CONTROL SYSTEMS FOR A VARIABLE CAPACITY ENGINE OIL PUMP - An oil circulating control system for an engine includes an engine speed module and a mode selection module. The engine speed module determines a speed of the engine. The mode selection module is configured to select a first pressure mode and a second pressure mode of an oil pump of the engine for the speed. The selection module selects one of the first pressure mode and the second pressure mode based on at least one mode request signal. The mode selection module signals a solenoid valve of a variable oil pressure circuit of the oil pump to transition to a first position when operating in the first pressure mode and to a second position when operating in the second pressure mode. | 09-01-2011 |
20110224948 | METHOD FOR THE DIAGNOSIS OF THE EGR COOLER EFFICIENCY IN A DIESEL ENGINE - A method is provided for the diagnosis of the EGR cooler efficiency in a Diesel engine that includes but is not limited to construction of a model for determining the temperature drop y=ΔT in the EGR cooler, the model having a parameter vector θ and an input vector x; performing a model calibration phase in order to estimate the bias h | 09-15-2011 |
20120063927 | CONTROL AND DIAGNOSTIC SYSTEMS FOR A VARIABLE CAPACITY ENGINE OIL PUMP AND AN ENGINE OIL PRESSURE SENSOR - A control system includes an oil pump module and a diagnostic module. The oil pump module, based on engine operating conditions, selectively generates a first mode request signal to initiate a first transition from operating an oil pump of an engine in one of a first pressure mode and a second pressure mode to operating the oil pump in another one of the first pressure mode and the second pressure mode. The second pressure mode is different from the first pressure mode. The diagnostic module, based on when a driver starts the engine, selectively generates a second mode request signal to initiate consecutive transitions from operating the oil pump in the second pressure mode to operating the oil pump in the first pressure mode. The diagnostic module diagnoses a pump fault when a first oil pressure change associated with the consecutive transitions is less than a first predetermined pressure change. | 03-15-2012 |
20120179353 | METHOD OF MONITORING AN ENGINE COOLANT SYSTEM OF A VEHICLE - A method of monitoring an engine coolant system includes modeling the total energy stored within an engine coolant. If an actual temperature of the engine coolant is below a minimum target temperature, the modeled total energy stored within the energy coolant is compared to a maximum stored energy limit to determine if sufficient energy exists within the engine coolant to heat the engine coolant to a temperature equal to or greater than the minimum target temperature. The engine coolant system fails the diagnostic check when the modeled total energy stored within the energy coolant is greater than the maximum stored energy limit, and the minimum target temperature has not been reached. | 07-12-2012 |
20120296518 | METHOD TO DIAGNOSE A FAULT OF AN OIL PISTON COOLING JETS VALVE - Methods for diagnosing a fault of an oil piston cooling jets valve of an internal combustion engine are provided. A method includes sensing a pressure value in a main oil gallery and checking whether the oil piston cooling jets valve is commanded in a state for opening a communication between the main oil gallery and an auxiliary oil gallery or in a state for closing the communication. A pressure value in the auxiliary oil gallery is checked to as to whether it exceeds a predetermined threshold value thereof, above which a jet nozzle of the auxiliary oil gallery automatically opens. A fault of the valve is identified if the pressure value in the main oil gallery exceeds the predetermined threshold value by a predetermined quantity and if a pressure value in the auxiliary oil gallery is different than expected on a basis of the state of the valve. | 11-22-2012 |
20120296547 | SYSTEM AND METHOD FOR DETERMINING COOLANT FLOW IN AN ENGINE - A system includes a temperature determination module and a flow determination module. The temperature determination module determines an engine coolant temperature based on input received from an engine coolant temperature sensor and determines an engine material temperature based on input received from an engine material temperature sensor. The engine coolant temperature is a temperature of coolant in an engine, and the engine material temperature is a temperature of at least one of an engine block and a cylinder head. The flow determination module selectively determines coolant flow through the engine based on the engine coolant temperature and the engine material temperature. | 11-22-2012 |
20120296548 | METHOD FOR PERFORMING ON/OFF DIAGNOSIS OF A SMART COOLING PUMP FOR AN INTERNAL COMBUSTION ENGINE - A method for performing on/off diagnosis of a smart cooling pump for an internal combustion engine comprising a cylinder having an inner liner layer, an external engine block layer, and a coolant layer placed between the inner liner layer and the external engine block layer, wherein the smart cooling pump pumps a coolant fluid inside the coolant layer is provided. | 11-22-2012 |
20130089436 | DIAGNOSTIC SYSTEM AND METHOD FOR A SWITCHABLE WATER PUMP - A system includes a pump control module and a pump diagnostic module. The pump control module switches a switchable water pump from off to on. The pump diagnostic module diagnoses a fault in the switchable water pump based on a first difference between an engine material temperature and an engine coolant temperature when the switchable water pump is switched from off to on. The engine coolant temperature is a temperature of coolant circulated through an engine and the engine material temperature is a temperature of at least one of an engine block and a cylinder head. | 04-11-2013 |
Patent application number | Description | Published |
20110224883 | METHOD TO DIAGNOSE A FAILURE OF AN OPCJ VALVE OF AN INTERNAL COMBUSTION ENGINE - A method is provided to diagnose a failure of an OPCJ valve of an internal combustion engine. The OPCJ valve is located in an auxiliary line connecting an engine lubrication line to at least an oil jet for squirting lubricating oil from the engine lubrication line towards a piston surface. The method provides for monitoring the pressure variation in the engine lubrication line due to a switching signal sent to the OPCJ valve. | 09-15-2011 |
20110276249 | METHOD TO OPERATE AN ELECTRICALLY DRIVEN OPCJ VALVE OF AN INTERNAL COMBUSTION ENGINE - A method is provided to operate an electrically driven OPCJ valve of an internal combustion engine that includes, but is not limited to cyclically performing a control method able to generate an opening request for the OPCJ valve, of opening (which includes, but is not limited to keeping opened the OPCJ valve), when the control method generates an opening request, and of closing (which includes, but is not limited to or keeping closed the OPCJ valve), when the control method does not generate an opening request. The control method comprises the steps of determining a value of a control parameter related to an engine torque, and of generating an opening request for the OPCJ valve, if the control parameter value exceeds a threshold value of the control parameter. | 11-10-2011 |
20120215397 | SYSTEM AND METHOD FOR PERFORMING ENGINE MATERIAL TEMPERATURE SENSOR DIAGNOSTICS - A diagnostic system for performing engine material temperature sensor diagnostics includes a coolant flow sensor configured to provide an indication of coolant flow within a coolant system; an engine state sensor configured to provide an indication of an operational state of an internal combustion engine; and a diagnostic module in communication with the coolant flow sensor and engine state sensor. The diagnostic module is configured to use the indication of coolant flow and the indication of an operational state of the internal combustion engine to estimate an amount of accumulated energy within the internal combustion engine. | 08-23-2012 |
20130080028 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An exemplary embodiment of the present disclosure provides a method for operating an internal combustion engine comprising: monitoring a value of a temperature parameter of a diesel particulate filter of the internal combustion engine; monitoring a value of an operating parameter of the internal combustion engine indicative of an engine load; using the monitored value of the engine load parameter to determine a threshold value of the diesel particulate filter temperature parameter; testing whether the monitored value of the diesel particulate filter temperature parameter exceeds the determined threshold value thereof; and diagnosing that the diesel particulate filter is overheated if the test returns positive. | 03-28-2013 |