Patents by Inventor Carlo Tosetti
Carlo Tosetti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11909124Abstract: An electronic device having multiple antenna groups for data communication may determine a temperature of a first antenna group and determine a power gain of a second antenna group. The electronic device may communicate using the second antenna group in response to determining that the temperature of the first antenna group exceeds a temperature threshold and the power gain of the second antenna group exceeds a gain threshold. In some embodiments, the electronic device may receive communication link preferences, determine an antenna group that is disposed outside of thermal hotspots of the electronic device, and determine a beam that enables the communication link preferences via the antenna group. The electronic device may then transmit or receive data via the antenna group by forming the beam.Type: GrantFiled: April 30, 2021Date of Patent: February 20, 2024Assignee: Apple Inc.Inventors: Franz J. Eder, Carlo Tosetti, Kenan Kocagoez, Prashant H. Vashi, Murali Mohan Chakka, Muthukumaran Dhanapal
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Publication number: 20220352627Abstract: An electronic device having multiple antenna groups for data communication may determine a temperature of a first antenna group and determine a power gain of a second antenna group. The electronic device may communicate using the second antenna group in response to determining that the temperature of the first antenna group exceeds a temperature threshold and the power gain of the second antenna group exceeds a gain threshold. In some embodiments, the electronic device may receive communication link preferences, determine an antenna group that is disposed outside of thermal hotspots of the electronic device, and determine a beam that enables the communication link preferences via the antenna group. The electronic device may then transmit or receive data via the antenna group by forming the beam.Type: ApplicationFiled: April 30, 2021Publication date: November 3, 2022Inventors: Franz J. Eder, Carlo Tosetti, Kenan Kocagoez, Prashant H. Vashi, Murali Mohan Chakka, Muthukumaran Dhanapal
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Patent number: 11025367Abstract: A signal processing device includes a determiner configured to determine if a codeword included in a data signal corresponds to a reference codeword included in a first set of reference codewords or a second set of reference codewords; a first estimator configured to estimate a first channel quality metric value for the data signal based on a first channel quality metric, if the codeword corresponds to a reference codeword included in the first set of reference codewords, wherein the first channel quality value is smaller than a reference channel quality metric value for the data signal, wherein the reference channel quality metric value for the data signal results from a channel quality estimation based on a predetermined channel quality metric; and a second estimator configured to estimate a second channel quality metric value for the data signal based on a second channel quality metric, if the codeword corresponds to a reference codeword included in the second set of reference codewords, wherein the secondType: GrantFiled: December 7, 2017Date of Patent: June 1, 2021Assignee: Intel IP CorporationInventors: Yeong-Sun Hwang, Franz Eder, Matthias Muennich, Ziyang Ju, Carlo Tosetti, Anchit Malhotra
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Patent number: 10938475Abstract: A method of measuring lengths of optical fibers on forward and return paths is provided in order to synchronize clocks of optical nodes connected by asymmetrical optical fiber paths. The method includes calculating, by a first optical network device, a first propagation delay of a first optical signal transmitted at a first wavelength on a first optical fiber to the first optical network device from a second optical network device and a second propagation delay of a second optical signal transmitted at a second wavelength on the first optical fiber to the first optical network device from the second optical network device. The second wavelength is different from the first wavelength. The method further includes determining, by the first optical network device, a first length of the first optical fiber based on the first propagation delay and the second propagation delay.Type: GrantFiled: December 18, 2019Date of Patent: March 2, 2021Assignee: Cisco Technology, Inc.Inventors: Gilberto Loprieno, Carlo Tosetti
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Publication number: 20190181981Abstract: A signal processing device includes a determiner configured to determine if a codeword included in a data signal corresponds to a reference codeword included in a first set of reference codewords or a second set of reference codewords; a first estimator configured to estimate a first channel quality metric value for the data signal based on a first channel quality metric, if the codeword corresponds to a reference codeword included in the first set of reference codewords, wherein the first channel quality value is smaller than a reference channel quality metric value for the data signal, wherein the reference channel quality metric value for the data signal results from a channel quality estimation based on a predetermined channel quality metric; and a second estimator configured to estimate a second channel quality metric value for the data signal based on a second channel quality metric, if the codeword corresponds to a reference codeword included in the second set of reference codewords, wherein the secondType: ApplicationFiled: December 7, 2017Publication date: June 13, 2019Inventors: Yeong-Sun Hwang, Franz Eder, Matthias Muennich, Ziyang Ju, Carlo Tosetti, Anchit Malhotra
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Patent number: 8867924Abstract: A method is provided to lower the overall power consumption of small form-factor pluggable (SFP) transceivers. The method includes receiving an indication to operate the SFP transceiver in a low power mode, and setting the SFP transceiver to a low power mode in response to the indication by at least switching off a thermal electric cooler (TEC) that controls a temperature of a laser diode of the SFP transceiver. The proposed method may be implemented whenever a reach is not more than a predetermined distance, for example, 65 kilometers. At such reduced distances, the TEC of the SFP transceiver can be switched off while still guaranteeing link functionality. The instant low power mode has the benefit of reducing the power consumption of the SFP transceiver so that, for example, host platforms with lower power delivery budgets can support the SFP transceiver for at least some applications.Type: GrantFiled: September 30, 2010Date of Patent: October 21, 2014Assignee: Cisco Technology, Inc.Inventors: Carlo Mariotti, Damiano Rossetti, Carlo Tosetti, Federico Fontanella
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Patent number: 8699871Abstract: Method and apparatus for operating for operating an optical network including a shared laser array are disclosed. An example apparatus includes include a first plurality of N lasers. Each laser of the first plurality of N lasers is configured to output a respective optical seed signal having a respective wavelength. The example apparatus further includes a first optical coupler coupled with the first plurality of N lasers. In the example embodiment, the first optical coupler is configured to multiplex the respective optical seed signals of the first plurality of N lasers onto a plurality of N optical fibers. In this example, each optical fiber of first plurality of N optical fibers transmits each of the respective optical seed signals produced by the plurality of N lasers to a respective distribution node for distribution to N respective optical network units, where the optical network units use the optical seed signals to seed respective optical transmitters located at the N optical network units.Type: GrantFiled: April 8, 2009Date of Patent: April 15, 2014Assignee: Cisco Technology, Inc.Inventors: Carlo Tosetti, Damiano Rossetti, Alessandro Cavaciuti
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Patent number: 8606112Abstract: An apparatus for connecting a host device to an optical network, and to provide a bi-directional electro-optic interface to the host device. The apparatus comprises at least one optical network port for connection to the optical network, and a transceiver circuit configured to generate optical transmit signals for transmission via the at least one network port. The transceiver circuit is further configured to process optical receive signals received via the network port. The apparatus further comprises an optical connector configured to provide bi-directional transfer of optical data signals with the host device.Type: GrantFiled: July 21, 2011Date of Patent: December 10, 2013Assignee: Cisco Technology, Inc.Inventors: Carlo Tosetti, Damiano Rossetti, Carlo Mariotti, Federico Fontanella
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Publication number: 20130022359Abstract: An apparatus for connecting a host device to an optical network, and to provide a bi-directional electro-optic interface to the host device. The apparatus comprises at least one optical network port for connection to the optical network, and a transceiver circuit configured to generate optical transmit signals for transmission via the at least one network port. The transceiver circuit is further configured to process optical receive signals received via the network port. The apparatus further comprises an optical connector configured to provide bi-directional transfer of optical data signals with the host device.Type: ApplicationFiled: July 21, 2011Publication date: January 24, 2013Applicant: CISCO TECHNOLOGY, INC.Inventors: Carlo Tosetti, Damiano Rossetti, Carlo Mariotti, Federico Fontanella
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Publication number: 20120308180Abstract: An apparatus is provided comprising a small form factor pluggable module having an optical connector configured to be coupled to a plurality of transmit and receive single mode optical fibers and an optical transmitter comprising a plurality of uncooled laser diodes configured to transmit optical signals to a plurality of transmit single mode optical fibers via the optical connector. The small form factor pluggable module is a quad small form factor pluggable plus (QSFP+) 40GBASE-SR4 module that has been converted for use with single mode fibers by substituting their vertical-cavity surface emitting laser diodes (VCSEL) with longer range uncooled laser diodes. Example replacement lasers may include uncooled Fabry-Perot (FP) laser diodes or Distributed Feedback (DFB) laser diodes. To connect the module to lower grade fibers, a single mode-to-multimode mode conditioning patch cord is provided with a plurality of inline physical offsets, one for each pair of fibers.Type: ApplicationFiled: June 1, 2011Publication date: December 6, 2012Applicant: CISCO TECHNOLOGY, INC.Inventors: Carlo Tosetti, Damiano Rossetti, Mala Krishnan, Marco Mazzini
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Patent number: 8238750Abstract: Various example embodiments are disclosed. According to an example embodiment, a dual split passive optical network (PON) may be provided that includes an optical splitting device, and a first and second distribution fibers connected to the optical splitting device. A first cyclic AWG may be coupled to the optical splitting device via the first distribution fiber and a second cyclic AWG may be coupled to the optical splitting device via the second distribution fiber. In other example embodiments, an asymmetric power splitting ratio may be used for the splitting device, or optical seeds and/or optical data signals may be allocated to each of the cyclic AWGs based on a performance of the optical data signals and/or power loss/attenuation of the respective distribution fibers.Type: GrantFiled: August 4, 2009Date of Patent: August 7, 2012Assignee: Cisco Technology, Inc.Inventors: Damiano Rossetti, Carlo Tosetti, Gianpaolo Barozzi
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Publication number: 20120093518Abstract: In one embodiment an apparatus is provided for supporting 100GBASE-SR10 data communications over an optical link. The apparatus includes a receptacle configured to receive an optical fiber cable comprising at least 10 OM3 optical fibers, the receptacle including individual channels for receiving respective ones of the at least 10 optical fibers, a plurality of optical receiver/transmitter pairs, and a plurality of wave division multiplexers configured to couple individual ones of the channels with respective ones of the optical receiver/transmitter pairs.Type: ApplicationFiled: October 13, 2010Publication date: April 19, 2012Applicant: CISCO TECHNOLOGY, INC.Inventors: Carlo Tosetti, Damiano Rossetti, Marco Mazzini
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Publication number: 20120082462Abstract: A method is provided to lower the overall power consumption of small form-factor pluggable (SFP) transceivers. The method includes receiving an indication to operate the SFP transceiver in a low power mode, and setting the SFP transceiver to a low power mode in response to the indication by at least switching off a thermal electric cooler (TEC) that controls a temperature of a laser diode of the SFP transceiver. The proposed method may be implemented whenever a reach is not more than a predetermined distance, for example, 65 kilometers. At such reduced distances, the TEC of the SFP transceiver can be switched off while still guaranteeing link functionality. The instant low power mode has the benefit of reducing the power consumption of the SFP transceiver so that, for example, host platforms with lower power delivery budgets can support the SFP transceiver for at least some applications.Type: ApplicationFiled: September 30, 2010Publication date: April 5, 2012Applicant: CISCO TECHNOLOGY, INC.Inventors: Carlo Mariotti, Damiano Rossetti, Carlo Tosetti, Federico Fontanella
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Patent number: 8095005Abstract: A link probe for multimode fibers in optical networks is provided. An optical test probe signal is sent over a multimode fiber of an optical network link and a receiver converts the optical signal into an electronic signal with a trigger generated by the clock recovery section of an EDC (electronic dispersion compensation) unit. The digital signal is processed by a modified IEEE algorithm to determine a TWDP (Transmitter and Waveform Dispersion Penalty) parameter which quantifies the transmission quality of the multimode fiber and link suitability to LRM transmission.Type: GrantFiled: October 26, 2007Date of Patent: January 10, 2012Assignee: Cisco Technology, Inc.Inventors: Carlo Tosetti, Giuseppe Pietro Ravasio, Damiano Rossetti
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Patent number: 8078053Abstract: Various example embodiments are disclosed. According to one example embodiment, a method may include transmitting a semiconductor laser-generated optical signal from a first end of a multi-mode fiber (MMF) optical link to a second end of the link. The optical signal may have a reference bandwidth at the first end of the link. The method may further include converting the optical signal to an electrical signal. The method may further include analyzing the electrical signal with an electronic dispersion compensator to determine an effective modal bandwidth (EMBW) of the received optical signal. The method may further include analyzing the electrical signal with an electronic dispersion compensator to determine an intersymbol interference (ISI) penalty of the optical link.Type: GrantFiled: September 19, 2008Date of Patent: December 13, 2011Assignee: Cisco Technology, Inc.Inventors: Marco Mazzini, Carlo Tosetti, Carlo Mariotti
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Publication number: 20110033187Abstract: Various example embodiments are disclosed. According to an example embodiment, a dual split passive optical network (PON) may be provided that includes an optical splitting device, and a first and second distribution fibers connected to the optical splitting device. A first cyclic AWG may be coupled to the optical splitting device via the first distribution fiber and a second cyclic AWG may be coupled to the optical splitting device via the second distribution fiber. In other example embodiments, an asymmetric power splitting ratio may be used for the splitting device, or optical seeds and/or optical data signals may be allocated to each of the cyclic AWGs based on a performance of the optical data signals and/or power loss/attenuation of the respective distribution fibers.Type: ApplicationFiled: August 4, 2009Publication date: February 10, 2011Applicant: Cisco Technology, Inc.Inventors: Damiano Rossetti, Carlo Tosetti, Gianpaolo Barozzi
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Publication number: 20100260496Abstract: Method and apparatus for operating for operating an optical network including a shared laser array are disclosed. An example apparatus includes include a first plurality of N lasers. Each laser of the first plurality of N lasers is configured to output a respective optical seed signal having a respective wavelength. The example apparatus further includes a first optical coupler coupled with the first plurality of N lasers. In the example embodiment, the first optical coupler is configured to multiplex the respective optical seed signals of the first plurality of N lasers onto a plurality of N optical fibers. In this example, each optical fiber of first plurality of N optical fibers transmits each of the respective optical seed signals produced by the plurality of N lasers to a respective distribution node for distribution to N respective optical network units, where the optical network units use the optical seed signals to seed respective optical transmitters located at the N optical network units.Type: ApplicationFiled: April 8, 2009Publication date: October 14, 2010Inventors: Carlo Tosetti, Damiano Rossetti, Alessandro Cavaciuti
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Patent number: 7555222Abstract: Methods and apparatus for supporting a plurality of modulation formats using a single transmitter are disclosed. According to one aspect of the present invention, a transmitter arrangement that provides a signal to a modulator that creates an optical data stream from the signal includes an encoder and a switching/filtering arrangement. The encoder has a state that is varied between first and second encoder states. If the state is the first encoder state, the encoder encodes the signal in a format associated with an optical duobinary (ODB) modulation format. Otherwise, the encoder does not encode the signal in the format associated with the ODB modulation format. The switching/filtering arrangement receives the signal from the encoder, and provides the signal to the modulator. If the variable state of the encoder is the first encoder state, the switching/filtering arrangement has a low bandpass configuration. Otherwise, the switching/filtering arrangement has a high bandpass configuration.Type: GrantFiled: February 8, 2006Date of Patent: June 30, 2009Assignee: Cisco Technology, Inc.Inventors: Damiano Rossetti, Carlo Tosetti, Giuseppe Pietro Ravasio
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Publication number: 20090110390Abstract: A link probe for multimode fibers in optical networks is provided. An optical test probe signal is sent over a multimode fiber of an optical network link and a receiver converts the optical signal into an electronic signal with a trigger generated by the clock recovery section of an EDC (electronic dispersion compensation) unit. The digital signal is processed by a modified IEEE algorithm to determine a TWDP (Transmitter and Waveform Dispersion Penalty) parameter which quantifies the transmission quality of the multimode fiber and link suitability to LRM transmission.Type: ApplicationFiled: October 26, 2007Publication date: April 30, 2009Applicant: CISCO TECHNOLOGY, INC.Inventors: Carlo Tosetti, Giuseppe Pietro Ravasio, Damiano Rossetti
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Publication number: 20070183791Abstract: Methods and apparatus for supporting a plurality of modulation formats using a single transmitter are disclosed. According to one aspect of the present invention, a transmitter arrangement that provides a signal to a modulator that creates an optical data stream from the signal includes an encoder and a switching/filtering arrangement. The encoder has a state that is varied between first and second encoder states. If the state is the first encoder state, the encoder encodes the signal in a format associated with an optical duobinary (ODB) modulation format. Otherwise, the encoder does not encode the signal in the format associated with the ODB modulation format. The switching/filtering arrangement receives the signal from the encoder, and provides the signal to the modulator. If the variable state of the encoder is the first encoder state, the switching/filtering arrangement has a low bandpass configuration. Otherwise, the switching/filtering arrangement has a high bandpass configuration.Type: ApplicationFiled: February 8, 2006Publication date: August 9, 2007Applicant: CISCO TECHNOLOGY, INC.Inventors: Damiano Rossetti, Carlo Tosetti, Giuseppe Ravasio