Patents by Inventor Larry Cantwell
Larry Cantwell 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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Publication number: 20220159101Abstract: A computer-implemented method for repurposing one or more software configurable layer 2 switches in an IP (Internet Protocal) computer network to function as a layer 1 switch. Ternary Content-Addressable Memory (TCAM) is reconfigured in each of the one or more layer 2 switches and one or more pipeline engines are routed to emulate layer 1 switching functionality in each of the one or more layer 2 switches.Type: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Applicant: NetScout Systems, Inc.Inventors: Larry Cantwell, Diego Warszawski, David L. Sclarsky
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Publication number: 20200021525Abstract: A computer-implemented method for repurposing one or more software configurable layer 2 switches in an IP (Internet Protocal) computer network to function as a layer 1 switch. Ternary Content-Addressable Memory (TCAM) is reconfigured in each of the one or more layer 2 switches and one or more pipeline engines are routed to emulate layer 1 switching functionality in each of the one or more layer 2 switches.Type: ApplicationFiled: July 12, 2019Publication date: January 16, 2020Applicant: NetScout Systems, Inc.Inventors: Larry Cantwell, Diego Warszawski, David L. Sclarsky
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Patent number: 10015072Abstract: An automated network test system includes an integrated network switch connected to a network under test. The network switch includes a first and second plurality of network switch ports. The network switch further includes a physical layer engine coupled to the first plurality of network switch ports. The network switch also includes at least one processor having a plurality of processing cores that can each asynchronously execute a test execution context and a test engine having a plurality of dynamically configurable function modules. The test engine is coupled to the second plurality of network switch ports, the physical layer engine and at least one processor. The test engine is configured for automatic testing of the network under test.Type: GrantFiled: July 7, 2016Date of Patent: July 3, 2018Assignee: NetScout Systems, Inc.Inventors: Larry Cantwell, Steve Schmidt, Flex Houvig, Bill Higgins
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Publication number: 20180013657Abstract: An automated network test system includes an integrated network switch connected to a network under test. The network switch includes a first and second plurality of network switch ports. The network switch further includes a physical layer engine coupled to the first plurality of network switch ports. The network switch also includes at least one processor having a plurality of processing cores that can each asynchronously execute a test execution context and a test engine having a plurality of dynamically configurable function modules. The test engine is coupled to the second plurality of network switch ports, the physical layer engine and at least one processor. The test engine is configured for automatic testing of the network under test.Type: ApplicationFiled: July 7, 2016Publication date: January 11, 2018Inventors: Larry Cantwell, Steve Schmidt, Flex Houvig, Bill Higgins
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Patent number: 9088377Abstract: A network switch includes first and second clock-and-data-recovery (CDR) circuits, a cross-bar switch electrically coupling the first and second CDR circuits, and a test pattern generation circuit electrically coupled to the first CDR circuit. The test pattern generation circuit is configured to generate a test pattern and transmit the test pattern from the first CDR circuit to the second CDR circuit via the cross-bar switch. The network switch also includes a test pattern checking circuit electrically coupled to the second CDR circuit and configured to verify the test pattern received at the second CDR circuit.Type: GrantFiled: May 19, 2014Date of Patent: July 21, 2015Assignee: OnPath Technologies Inc.Inventors: Richard A. Eddy, Larry Cantwell
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Publication number: 20140254397Abstract: A network switch includes first and second clock-and-data-recovery (CDR) circuits, a cross-bar switch electrically coupling the first and second CDR circuits, and a test pattern generation circuit electrically coupled to the first CDR circuit. The test pattern generation circuit is configured to generate a test pattern and transmit the test pattern from the first CDR circuit to the second CDR circuit via the cross-bar switch. The network switch also includes a test pattern checking circuit electrically coupled to the second CDR circuit and configured to verify the test pattern received at the second CDR circuit.Type: ApplicationFiled: May 19, 2014Publication date: September 11, 2014Applicant: OnPath Technologies Inc.Inventors: Richard A. Eddy, Larry Cantwell
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Patent number: 8790068Abstract: The present disclosure describes a low-wind, dual-stage, vertical-axis, wind-generated power turbine comprising a structural support tower, at least four turbine assemblies stacked on top of one another within individual turbine bays, a central drive shaft connecting the turbine assemblies, a draft induction channel surrounding the drive shaft, a spiral blade running through the induction channel, a paddle turbine assembly at the base of the tower which propels the spiral blade, a blower source which powers the paddle turbine, a built-in solar system which feeds the blower, external, natural wind directional slats, and a high pressure, fluid-drive, Hydrabine turbine mechanically coupled to a transmission or CTV, coupled to a one Mega Watt output generator.Type: GrantFiled: March 2, 2010Date of Patent: July 29, 2014Inventor: Larry Cantwell
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Patent number: 8743715Abstract: A network switch includes first and second clock-and-data-recovery (CDR) circuits, a cross-bar switch to couple the first and second CDR circuits, and a first test pattern generation circuit electrically coupled with the first CDR circuit. The first test pattern generation circuit is configured to generate a test pattern and transmit the test pattern from the first CDR circuit to the second CDR circuit via the cross-bar switch. The network switch also includes a first test pattern checking circuit, electrically coupled with the second CDR circuit, to verify the test pattern received at the second CDR circuit.Type: GrantFiled: January 24, 2011Date of Patent: June 3, 2014Assignee: OnPath Technologies Inc.Inventors: Richard Alan Eddy, Larry Cantwell
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Patent number: 7835288Abstract: The network switch is configured to enable monitoring of switched data. The network switch includes a housing and one or more port cards. Each port card has one or more physical ports and includes switching circuitry to selectively create a communication path between two physical ports. The network switch also includes packet analyzer circuitry, situated within the housing, to monitor data packets switched via a communication path between two physical ports without substantially degrading signal integrity of the data packets.Type: GrantFiled: July 2, 2008Date of Patent: November 16, 2010Assignee: OnPath Technologies Inc.Inventors: Larry Cantwell, Hee Lui, Ghanshyam Dave
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Publication number: 20100230974Abstract: The present disclosure describes a low-wind, dual-stage, vertical-axis, wind-generated power turbine comprising a structural support tower, at least four turbine assemblies stacked on top of one another within individual turbine bays, a central drive shaft connecting the turbine assemblies, a draft induction channel surrounding the drive shaft, a spiral blade running through the induction channel, a paddle turbine assembly at the base of the tower which propels the spiral blade, a blower source which powers the paddle turbine, a built-in solar system which feeds the blower, external, natural wind directional slats, and a high pressure, fluid-drive, Hydrabine turbine mechanically coupled to a transmission or CTV, coupled to a one Mega Watt output generator.Type: ApplicationFiled: March 2, 2010Publication date: September 16, 2010Inventor: Larry Cantwell
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Patent number: 7793415Abstract: A method for suppression of EMI emissions around an opening of an electronic enclosure that holds a physical layer switch. Fiber optic cables are installed on a plurality of ports attached to the switch such that the cables pass through the opening in the cabinet. The cables are divided into a plurality of discrete bundles. An enclosure is placed around each bundle while the enclosure is in an open state and thereafter the enclosure is closed such that the enclosure surrounds the bundle. The enclosure is designed such that it suppresses EMI emissions. After the enclosures are closed, they are positioned in an arrangement in the opening of the electronic enclosure.Type: GrantFiled: November 20, 2007Date of Patent: September 14, 2010Assignee: OnPath TechnologiesInventors: David P. Vitt, Thomas J. Carullo, Larry Cantwell
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Publication number: 20100002588Abstract: The network switch is configured to enable monitoring of switched data. The network switch includes a housing and one or more port cards. Each port card has one or more physical ports and includes switching circuitry to selectively create a communication path between two physical ports. The network switch also includes packet analyzer circuitry, situated within the housing, to monitor data packets switched via a communication path between two physical ports without substantially degrading signal integrity of the data packets.Type: ApplicationFiled: July 2, 2008Publication date: January 7, 2010Inventors: Larry Cantwell, Hee Lui, Ghanshyam Dave
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Patent number: 7606150Abstract: A Fiber Channel switch is presented that tracks the congestion status of destination ports in an XOFF mask at each input. A mapping is maintained between virtual channels on an ISL and the destination ports to allow changes in the XOFF mask to trigger a primitive to an upstream port that provides virtual channel flow control. The XOFF mask is also used to avoid sending frames to a congested port. Instead, these frames are stored on a single deferred queue and later processed in a manner designed to maintain frame ordering. A routing system is provided that applies multiple routing rules in parallel to perform line speed routing. The preferred switch fabric is cell based, with techniques used to manage path maintenance for variable length frames and to adapt to varying transmission rates in the system. Finally, the switch allows data and microprocessor communication to share the same crossbar network.Type: GrantFiled: May 8, 2006Date of Patent: October 20, 2009Assignee: Computer Network Technology CorporationInventors: Harry V. Paul, Anthony G. Tometta, Henry Q. Gonzalez, Larry Cantwell, Gregory L. Koellner, Steven G. Schmidt, Jereld W. Pearson, Jason Workman, James C. Wright, Scott Carlsen, Govindaswamy Nallur
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Publication number: 20090129042Abstract: A method for suppression of EMI emissions around an opening of an electronic enclosure that holds a physical layer switch. Fiber optic cables are installed on a plurality of ports attached to the switch such that the cables pass through the opening in the cabinet. The cables are divided into a plurality of discrete bundles. An enclosure is placed around each bundle while the enclosure is in an open state and thereafter the enclosure is closed such that the enclosure surrounds the bundle. The enclosure is designed such that it suppresses EMI emissions. After the enclosures are closed, they are positioned in an arrangement in the opening of the electronic enclosure.Type: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: ONPATH TECHNOLOGIESInventors: David P. Vitt, Thomas J. Carullo, Larry Cantwell
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Patent number: 7515537Abstract: A switch segments variable length frames into cells for transmission over a cell-based switch fabric and handles rate differences between the input data rate and the switch fabric data rate. The fabric handles multiple cell packets by maintaining a switch path until a certain number of cells are transmitted as indicated in a length field in the first data cell. The first cell contains a full data payload, and a length field value sufficient to handle a maximum length frame. Subsequent cells can contain less than a full data payload, with the number of valid bytes in the cell being indicated in the length field. The last cell used to segment the frame contains an end of frame indicator. The indicator signals the destination port side of the switch to terminate the packet path in the switch fabric prematurely—before the number of cells indicated in the first data cell.Type: GrantFiled: June 28, 2006Date of Patent: April 7, 2009Assignee: McData Services CorporationInventors: Harry V. Paul, Henry G. Gonzalez, Larry Cantwell
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Publication number: 20060274656Abstract: A switch segments variable length frames into cells for transmission over a cell-based switch fabric and handles rate differences between the input data rate and the switch fabric data rate. The fabric handles multiple cell packets by maintaining a switch path until a certain number of cells are transmitted as indicated in a length field in the first data cell. The first cell contains a full data payload, and a length field value sufficient to handle a maximum length frame. Subsequent cells can contain less than a full data payload, with the number of valid bytes in the cell being indicated in the length field. The last cell used to segment the frame contains an end of frame indicator. The indicator signals the destination port side of the switch to terminate the packet path in the switch fabric prematurely—before the number of cells indicated in the first data cell.Type: ApplicationFiled: June 28, 2006Publication date: December 7, 2006Inventors: Harry Paul, Nenry Gonzalez, Larry Cantwell
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Publication number: 20060203725Abstract: A Fibre Channel switch is presented that tracks the congestion status of destination ports in an XOFF mask at each input. A mapping is maintained between virtual channels on an ISL and the destination ports to allow changes in the XOFF mask to trigger a primitive to an upstream port that provides virtual channel flow control. The XOFF mask is also used to avoid sending frames to a congested port. Instead, these frames are stored on a single deferred queue and later processed in a manner designed to maintain frame ordering. A routing system is provided that applies multiple routing rules in parallel to perform line speed routing. The preferred switch fabric is cell based, with techniques used to manage path maintenance for variable length frames and to adapt to varying transmission rates in the system. Finally, the switch allows data and microprocessor communication to share the same crossbar network.Type: ApplicationFiled: May 8, 2006Publication date: September 14, 2006Inventors: Harry Paul, Anthony Tometta, Henry Gonzalez, Larry Cantwell, Gregory Koellner, Steven Schmidt, Jereld Pearson, Jason Workman, James Wright, Scott Carlsen, Govindaswamy Nallur
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Patent number: 7072298Abstract: A switch segments variable length frames into cells for transmission over a cell-based switch fabric and handles rate differences between the input data rate and the switch fabric data rate. The fabric handles multiple cell packets by maintaining a switch path until a certain number of cells are transmitted as indicated in a length field in the first data cell. The first cell contains a full data payload, and a length field value sufficient to handle a maximum length frame. Subsequent cells can contain less than a full data payload, with the number of valid bytes in the cell being indicated in the length field. The last cell used to segment the frame contains an end of frame indicator. The indicator signals the destination port side of the switch to terminate the packet path in the switch fabric prematurely—before the number of cells indicated in the first data cell.Type: GrantFiled: June 21, 2004Date of Patent: July 4, 2006Assignee: Computer Network Technology CorporationInventors: Harry V. Paul, Henry O. Gonzalez, Larry Cantwell
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Patent number: 7042842Abstract: A Fiber Channel switch is presented that tracks the congestion status of destination ports in an XOFF mask at each input. A mapping is maintained between virtual channels on an ISL and the destination ports to allow changes in the XOFF mask to trigger a primitive to an upstream port that provides virtual channel flow control. The XOFF mask is also used to avoid sending frames to a congested port. Instead, these frames are stored on a single deferred queue and later processed in a manner designed to maintain frame ordering. A routing system is provided that applies multiple routing rules in parallel to perform line speed routing. The preferred switch fabric is cell based, with techniques used to manage path maintenance for variable length frames and to adapt to varying transmission rates in the system. Finally, the switch allows data and microprocessor communication to share the same crossbar network.Type: GrantFiled: June 21, 2004Date of Patent: May 9, 2006Assignee: Computer Network Technology CorporationInventors: Harry V. Paul, Anthony G. Tornetta, Henry G. Gonzalez, Larry Cantwell, Gregory L. Koellner, Steven G. Schmidt, Jereld W. Pearson, Jason Workman, James C. Wright, Scott Carlsen, Govindaswamy Nallur
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Publication number: 20050047334Abstract: A Fibre Channel switch is presented that tracks the congestion status of destination ports in an XOFF mask at each input. A mapping is maintained between virtual channels on an ISL and the destination ports to allow changes in the XOFF mask to trigger a primitive to an upstream port that provides virtual channel flow control. The XOFF mask is also used to avoid sending frames to a congested port. Instead, these frames are stored on a single deferred queue and later processed in a manner designed to maintain frame ordering. A routing system is provided that applies multiple routing rules in parallel to perform line speed routing. The preferred switch fabric is cell based, with techniques used to manage path maintenance for variable length frames and to adapt to varying transmission rates in the system. Finally, the switch allows data and microprocessor communication to share the same crossbar network.Type: ApplicationFiled: June 21, 2004Publication date: March 3, 2005Inventors: Harry Paul, Anthony Tornetta, Henry Gonzalez, Larry Cantwell, Gregory Koellner, Steven Schmidt, Jereld Pearson, Jason Workman, James Wright, Scott Carlsen, Govindaswamy Nallur