Patents by Inventor Antonio D'Errico

Antonio D'Errico 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).

  • Patent number: 8717651
    Abstract: An optical device comprises an optical device stage, which comprises an optical input, an optical AND gate, an optical flip-flop and an optical output. The optical input is arranged to receive an optical input pulse at an input wavelength. The optical AND gate comprises a first input arranged to receive a part of said optical input pulse, a second input arranged to receive at least a part of a flip-flop optical output signal, and an output. The optical AND gate is arranged to generate an AND gate optical output pulse dependent on said flip-flop optical output signal. The optical flip-flop comprises a first input arranged to receive a further part of said optical input pulse, a second input arranged to receive a said AND gate optical output pulse, and an output. The optical flip-flop is arranged to generate said flip-flop output signal at a flip-flop output wavelength. At least a part of the flip-flop output signal is provided to said output.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: May 6, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Gianluca Meloni, Antonella Bogoni, Antonio D'Errico, Gianluca Berrettini, Luca Poti
  • Publication number: 20140056584
    Abstract: A reconfigurable optical add-drop multiplexer (10) comprising an input (20), an output (22), drop outputs (30), add inputs (22), a demultiplexer (18), a cross-connect element (12), a drop element (34) and an add element (26). The cross-connect element (12) comprises cross-connect outputs (36), a by-pass output (38), and optical switches (14) connected together as a first switch array. The drop element (34) comprises optical switches (14) connected together as a second switch array. The add element (26) comprises optical switches (14) connected together as a third switch array. Each optical switch (14) comprises a first input (13), a second input (15), a first output (17) and a second output (19). Each optical switch is arranged to deliver a first optical signal received at the first input to the first output.
    Type: Application
    Filed: March 15, 2011
    Publication date: February 27, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Francesco Testa, Mauro Rudi Casanova, Antonio D' Errico
  • Publication number: 20140023377
    Abstract: A free space optical communications link node 10 comprising transmitter apparatus 12 comprising a first optical transmitter 14, arranged to transmit high priority traffic on a first upstream optical signal having a first wavelength and at a first optical signal power, and a second optical transmitter 16 arranged to transmit low priority traffic on a second upstream optical signal having a second wavelength, different to the first wavelength, and at a second optical signal power. The node 10 further comprises receiver apparatus 18 comprising a first optical amplifier 20 arranged to receive and amplify a first downstream optical signal having a third wavelength and carrying high priority traffic and a second downstream optical signal having a fourth wavelength, different to the third wavelength, and carrying low priority traffic.
    Type: Application
    Filed: November 8, 2010
    Publication date: January 23, 2014
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Ernesto Ciaramella, Antonio D'Errico
  • Publication number: 20130136447
    Abstract: An optical access network comprises L wavelength division multiplexed access sub-networks. Each of the wavelength division multiplexed access sub-networks is arranged to use a set of wavelength channels. M optical line termination apparatus, each receive traffic from a respective operator network and output traffic on the wavelength channels. A wavelength routing apparatus comprises M sets of first ports and L second ports. Each set of first ports connects to a respective one of the optical line termination apparatus and each second port connects to an optical link of a respective one of the wavelength division multiplexed access sub-networks. The wavelength routing apparatus is arranged to route the set of wavelength channels between the sets of first ports and the second ports and to route different wavelength channels of the same wavelength to different ones of the second ports.
    Type: Application
    Filed: April 28, 2010
    Publication date: May 30, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Fabio Cavaliere, Luca Giorgi, Antonio D'Errico, Renato Grosso
  • Publication number: 20130129341
    Abstract: A wireless communications link comprising an RF link and a free space optics (FSO) link, a switch, an RF signal monitoring apparatus, an optical signal monitoring apparatus, alarm apparatus and a controller. The switch operates in a normal mode to aggregate the links to form a link aggregation group and to route traffic on the link aggregation group, a first protection mode to route traffic on the FSO link, or a second protection mode to route traffic on the RF link. The controller is arranged to receive an alarm signal and to generate and transmit a control signal to cause the switch to operate in the first protection mode when a first alarm signal is received, the second protection mode when a second alarm signal is received, and the normal mode when an indicator is received indicating that both signal quality parameters are above their threshold values.
    Type: Application
    Filed: June 16, 2010
    Publication date: May 23, 2013
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Antonio D'Errico, Marzio Puleri
  • Publication number: 20130070754
    Abstract: Path computation involves determining (120, 930) an aggregate cost for a portion of the path, based at least on the power consumption attributable to use of interfaces along that portion, comparing (130, 930) the portion of the first possible path with a different portion corresponding to a different possible path for the traffic request, based at least on their respective aggregate costs, and selecting (140, 930) which portion to use for the traffic request based on the comparison. Having path selection influenced by the power consumption values, can lead to lower overall consumption in operation than relying only on optimizing nodes individually without regard to how the nodes are used. Path selection can take into account indications of which parts are in a power down mode, and can involve powering up such parts if needed.
    Type: Application
    Filed: July 14, 2010
    Publication date: March 21, 2013
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Paola Iovanna, Antonio D'Errico, Francesco Testa
  • Publication number: 20120328292
    Abstract: A packet switch 40 comprises wavelength tunable optical transmitters 12, an optical switch fabric 42, optical detectors 30 and a controller 32. The transmitters 12 are arranged to receive at least one electrical signal packet to be switched and convert it into a corresponding optical signal packet at an input wavelength. The optical switch fabric 42 comprises an ingress stage 44 comprising wavelength selective routers 46 and an egress stage 50 comprising wavelength selective routers 54 and tunable wavelength converters 26 arranged to receive an optical signal at the input wavelength and to output an optical signal at an output wavelength. The controller 32 is arranged to set the input wavelength of a transmitter 12 and the output wavelength of a wavelength converter to configure a path across the switch fabric 42 connecting the transmitter 12 to a detector 30. A communications network router 90 comprises an input module 92, a packet switch 40, an output module 96 and a scheduler 94.
    Type: Application
    Filed: January 18, 2010
    Publication date: December 27, 2012
    Inventors: Francesco Testa, Antonio D'errico
  • Publication number: 20120250580
    Abstract: A switching node for an optical communication system has an electrical switch, coupled to switch electrical signals from an input converter to a selected one of the outputs, and has a framer for reading or writing optical transport overhead information from or to the electrical signals. A bypass path is provided so that at least some of the signals being switched can bypass the framer. This can enable each node to be more efficient or handle more signals, since the framer no longer has to process all the signals. A reduction in power consumption can result. A method of configuring the switching node can involve a management system receiving information about the network, determining a new wavelength routing configuration and sending control signals to the node to configure the switches and control which signals use the bypass path.
    Type: Application
    Filed: October 20, 2009
    Publication date: October 4, 2012
    Inventors: Francesco Testa, Antonio D'errico
  • Publication number: 20120229890
    Abstract: An optical device comprises an optical device stage, which comprises an optical input, an optical AND gate, an optical flip-flop and an optical output. The optical input is arranged to receive an optical input pulse at an input wavelength. The optical AND gate comprises a first input arranged to receive a part of said optical input pulse, a second input arranged to receive at least a part of a flip-flop optical output signal, and an output. The optical AND gate is arranged to generate an AND gate optical output pulse dependent on said flip-flop optical output signal. The optical flip-flop comprises a first input arranged to receive a further part of said optical input pulse, a second input arranged to receive a said AND gate optical output pulse, and an output. The optical flip-flop is arranged to generate said flip-flop output signal at a flip-flop output wavelength. At least a part of the flip-flop output signal is provided to said output.
    Type: Application
    Filed: October 20, 2009
    Publication date: September 13, 2012
    Inventors: Gianluca Meloni, Antonella Bogoni, Antonio D'Errico, Gianluca Berrettini, Luca Poti
  • Publication number: 20100329680
    Abstract: The invention relates to improvements in or relating to optical networks. Methods and apparatus are disclosed for providing communications services to at least one user. Transmission of an optical signal in the downstream direction is described comprising at least one Wavelength Division Multiplexing channel such that at least one of the channels is an unmodulated channel. The unmodulated channel is arranged to transmit user data from the at least one user in the upstream direction.
    Type: Application
    Filed: April 1, 2008
    Publication date: December 30, 2010
    Inventors: Marco Presi, Giampiero Contestabile, Ernesto Ciaramella, Fabio Cavaliere, Roberto Proiettii, Antonio D'Errico, Pierpaolo Ghiggino
  • Patent number: 7417790
    Abstract: A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a ?LINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: August 26, 2008
    Assignee: Marconi Communications SpA
    Inventors: Antonella Bogoni, Giovanni Sacchi, Antonio D'Errico, Fabrizio Di Pasquale
  • Publication number: 20070274732
    Abstract: An optical modulation converter (10) for converting the modulation format of an optical input signal is characterized by a birefringent medium (14), polarization maintaining fibre, with a selected differential group delay between its two main axes of symmetry through which the optical input signal is passed to be separated into two optical components each travelling along one of the main axes of the medium at a different group velocity to thereby convert the modulation format of the input signal. By appropriate selection of the differential group delay imparted by the medium relative to the bit rate of the input signal and by appropriately presenting the input signal relative to the main axes of the medium conversion between different modulation formats can be achieved.
    Type: Application
    Filed: March 8, 2005
    Publication date: November 29, 2007
    Inventors: Antonio D'Errico, Ernesto Ciaramella
  • Publication number: 20070064305
    Abstract: A looped WDM optical network comprises an optical loop with optical amplifiers (12,16) between the sections of the loop (11) and with ASE recirculation in the loop. At a point of the loop a laser beam is injected and allowed to circulate in the loop with the laser beam being centered around a ?LINK wavelength where it is desired that a lasing peak be generated. This supplies high network strength in terms of section loss variations and greatly improves the OSNR of the WDM signal. High network survivability is also achievable.
    Type: Application
    Filed: September 10, 2004
    Publication date: March 22, 2007
    Inventors: Antonella Bogoni, Giovanni Sacchi, Antonio D'Errico, Fabrizio Di Pasquale