Patents by Inventor Luca Cafiero

Luca Cafiero 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: 10649148
    Abstract: A device is provided for optical mode spot size conversion to optically couple a semiconductor waveguide with an optical fiber. The device includes a waveguide comprising a waveguide taper region, which comprises a shoulder portion and a ridge portion above the shoulder portion. The ridge portion has a width that tapers to meet a width of the shoulder portion. The waveguide taper region comprises a first material. The device also has a mode converter coupled to the waveguide. The mode converter includes a plurality of stages, and each of the plurality of stages tapers in a direction similar to a direction of taper of the waveguide taper region. The mode converter is made of a second material different from the first material.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 12, 2020
    Assignee: Skorpios Technologies, Inc.
    Inventors: Majid Sodagar, Stephen B. Krasulick, John Zyskind, Paveen Apiratikul, Luca Cafiero
  • Publication number: 20190170944
    Abstract: A device is provided for optical mode spot size conversion to optically couple a semiconductor waveguide with an optical fiber. The device includes a waveguide comprising a waveguide taper region, which comprises a shoulder portion and a ridge portion above the shoulder portion. The ridge portion has a width that tapers to meet a width of the shoulder portion. The waveguide taper region comprises a first material. The device also has a mode converter coupled to the waveguide. The mode converter includes a plurality of stages, and each of the plurality of stages tapers in a direction similar to a direction of taper of the waveguide taper region. The mode converter is made of a second material different from the first material.
    Type: Application
    Filed: October 25, 2018
    Publication date: June 6, 2019
    Inventors: Majid Sodagar, Stephen B. Krasulick, John Zyskind, Paveen Apiratikul, Luca Cafiero
  • Publication number: 20190113680
    Abstract: A device for optical communication is described. The device comprises two transceivers integrated on one chip. A first transceiver can be used with existing optical-communication architecture. As a more advanced optical-communication architecture becomes adopted, the device can be switched from using the first transceiver to using a second transceiver to communicate using the more advanced optical-communication architecture.
    Type: Application
    Filed: October 15, 2018
    Publication date: April 18, 2019
    Applicant: Skorpios Technologies, Inc.
    Inventors: Majid Sodagar, Stephen B. Krasulick, John Zyskind, Paveen Apiratikul, Luca Cafiero
  • Publication number: 20190020585
    Abstract: Systems, methods, and non-transitory computer-readable storage media for performing hierarchical routing are disclosed. The method includes identifying routes in a computer network and arranging those routes in two separate routing tables. The first routing table is stored on a first module and the second routing table is stored on a second module.
    Type: Application
    Filed: September 17, 2018
    Publication date: January 17, 2019
    Inventors: Ayan Banerjee, Ramana Mellacheruvu, Abhishek Saxena, Vishal Jain, Luca Cafiero
  • Patent number: 10079761
    Abstract: Systems, methods, and non-transitory computer-readable storage media for performing hierarchical routing are disclosed. The method includes identifying routes in a computer network and arranging those routes in two separate routing tables. The first routing table is stored on a first module and the second routing table is stored on a second module.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: September 18, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Ayan Banerjee, Ramana Mellacheruvu, Abhishek Saxena, Vishal Jain, Luca Cafiero
  • Patent number: 9935714
    Abstract: An apparatus, system and method for facilitating higher bandwidth communication in a data center using existing multi-mode fibers. A first transceiver within a first device transmits Ethernet traffic to a second device over first and second optical fibers and receives return optical signals over the same first and second optical devices. By varying the wavelengths between the transmitted and received optical signals, the same optical fibers can be used to both transmit and receive optical signals. A second transceiver within the same housing as the first transceiver performs the same function. In this fashion, one device can be coupled to four bidirectional optical fibers, each transmitting and receiving optical signals at 20 Gbps.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 3, 2018
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Cafiero, Franco Tomada
  • Patent number: 9680266
    Abstract: In one embodiment, a method for increasing potential data capacity for a high-density transceiver connector includes: aligning at least two transceiver-switch copper contacts opposite at least one network switch copper contact associated with a network switch, aligning at least two transceiver-cable copper contacts opposite at least one cable copper contact, and connecting the at least two transceiver-switch copper contacts to the at least two transceiver-cable copper contacts, wherein the high-density transceiver connector shares a form factor with a low-density transceiver connector.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: June 13, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Franco Tomada, Luca Cafiero
  • Publication number: 20170063459
    Abstract: An apparatus, system and method for facilitating higher bandwidth communication in a data center using existing multi-mode fibers. A first transceiver within a first device transmits Ethernet traffic to a second device over first and second optical fibers and receives return optical signals over the same first and second optical devices. By varying the wavelengths between the transmitted and received optical signals, the same optical fibers can be used to both transmit and receive optical signals. A second transceiver within the same housing as the first transceiver performs the same function. In this fashion, one device can be coupled to four bidirectional optical fibers, each transmitting and receiving optical signals at 20 Gbps.
    Type: Application
    Filed: November 15, 2016
    Publication date: March 2, 2017
    Inventors: Luca Cafiero, Franco Tomada
  • Publication number: 20170054259
    Abstract: In one embodiment, a method for increasing potential data capacity for a high-density transceiver connector includes: aligning at least two transceiver-switch copper contacts opposite at least one network switch copper contact associated with a network switch, aligning at least two transceiver-cable copper contacts opposite at least one cable copper contact, and connecting the at least two transceiver-switch copper contacts to the at least two transceiver-cable copper contacts, wherein the high-density transceiver connector shares a form factor with a low-density transceiver connector.
    Type: Application
    Filed: August 18, 2015
    Publication date: February 23, 2017
    Inventors: Franco TOMADA, Luca Cafiero
  • Patent number: 9515740
    Abstract: An apparatus, system and method for facilitating higher bandwidth communication in a data center using existing multi-mode fibers. A first transceiver within a first device transmits Ethernet traffic to a second device over first and second optical fibers and receives return optical signals over the same first and second optical devices. By varying the wavelengths between the transmitted and received optical signals, the same optical fibers can be used to both transmit and receive optical signals. A second transceiver within the same housing as the first transceiver performs the same function. In this fashion, one device can be coupled to four bidirectional optical fibers, each transmitting and receiving optical signals at 20 Gbps.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: December 6, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Cafiero, Franco Tomada
  • Patent number: 9405698
    Abstract: This document discusses, among other things, an example system and methods for memory expansion. An example embodiment includes receiving a memory request from a memory controller over a channel. Based on the memory request, the example embodiment includes selecting a location in memory to couple to a sub-channel of the channel and configuring the set of field effect transistors to couple the channel with the sub-channel. In the example embodiment, data may be allowed to flow between the memory controller and the location in the memory over the channel and the sub-channel.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: August 2, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Mario Mazzola, Satyanarayana Nishtala, Luca Cafiero, Philip Manela
  • Publication number: 20160156414
    Abstract: An apparatus, system and method for facilitating higher bandwidth communication in a data center using existing multi-mode fibers. A first transceiver within a first device transmits Ethernet traffic to a second device over first and second optical fibers and receives return optical signals over the same first and second optical devices. By varying the wavelengths between the transmitted and received optical signals, the same optical fibers can be used to both transmit and receive optical signals. A second transceiver within the same housing as the first transceiver performs the same function. In this fashion, one device can be coupled to four bidirectional optical fibers, each transmitting and receiving optical signals at 20 Gbps.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 2, 2016
    Inventors: Luca Cafiero, Franco Tomada
  • Patent number: 9246834
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: January 26, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Cafiero, Silvano Gai
  • Patent number: 9100313
    Abstract: A multi-stage network switch comprises a plurality of ingress port subsystems each comprising one or more ingress ports configured to receive packets. The switch also comprises a plurality of unscheduled crossbar switching elements connected to the ingress port subsystems that are configured to receive one or more packets from at least one of the ingress port subsystems. The switch further comprises a plurality of egress port subsystems each comprising a memory and a plurality of egress ports. The memory comprises at least one shared egress buffer configured to receive any packets forwarded by the crossbar switching elements from the ingress port subsystems directed to the egress port subsystem, and the egress ports are configured to transmit the packets received in the shared egress buffer.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 4, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Mario Mazzola, Luca Cafiero, Francis Matus, Georges Akis, Peter Newman
  • Publication number: 20150124806
    Abstract: Systems, methods, and non-transitory computer-readable storage media for performing hierarchical routing are disclosed. The method includes identifying routes in a computer network and arranging those routes in two separate routing tables. The first routing table is stored on a first module and the second routing table is stored on a second module.
    Type: Application
    Filed: September 4, 2014
    Publication date: May 7, 2015
    Inventors: Ayan Banerjee, Ramana Mellacheruvu, Abhishek Saxena, Vishal Jain, Luca Cafiero
  • Patent number: 9027019
    Abstract: In one embodiment, a method includes defining a plurality of virtual drives in a physical drive in communication with a plurality of servers, assigning virtualization parameters to each of the virtual drives, and communicating the virtualization parameters to a drive manager located at the physical drive and operable to configure the virtual drives on the physical drive. An apparatus is also disclosed.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: May 5, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Satya Nishtala, Luca Cafiero
  • Publication number: 20150036499
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Application
    Filed: September 15, 2014
    Publication date: February 5, 2015
    Inventors: Luca Cafiero, Silvano Gai
  • Publication number: 20140331095
    Abstract: This document discusses, among other things, an example system and methods for memory expansion. An example embodiment includes receiving a memory request from a memory controller over a channel. Based on the memory request, the example embodiment includes selecting a location in memory to couple to a sub-channel of the channel and configuring the set of field effect transistors to couple the channel with the sub-channel. In the example embodiment, data may be allowed to flow between the memory controller and the location in the memory over the channel and the sub-channel.
    Type: Application
    Filed: July 21, 2014
    Publication date: November 6, 2014
    Inventors: Mario Mazzola, Satyanarayana Nishtala, Luca Cafiero, Philip Manela
  • Publication number: 20140314425
    Abstract: Techniques are presented herein to facilitate higher bandwidth communications in a data center using existing multi-mode fibers and full-duplex optical communication techniques. A first device transmits to a second device a first optical signal at a first wavelength on a first optical fiber. The first optical signal carries a first portion of Ethernet traffic. The first device receives a second optical signal transmitted at a second wavelength on the first optical fiber from the second device. The second optical signal carries a first portion of Ethernet traffic. On a second optical fiber, the first device transmits to the second device a third optical signal at a third wavelength. The third optical signal carries a second portion of Ethernet traffic. The first device receives a fourth optical signal at a fourth wavelength on the second optical fiber, the fourth optical signal carrying a second portion of Ethernet.
    Type: Application
    Filed: April 17, 2013
    Publication date: October 23, 2014
    Applicant: Cisco Technology, Inc.
    Inventor: Luca Cafiero
  • Patent number: 8842694
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: September 23, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Luca Cafiero, Silvano Gai