Patents by Inventor David Stephen Griswold
David Stephen Griswold 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: 11621917Abstract: Allowing a network function (such as a router, firewall or SD-WAN endpoint) or service chain of network functions to transparently access a network uplink, while also allowing a set of management entities to access the same link without interference or configuration. To the extent that a conflict arises between ports allocated to the management functions and to the network functions, the relevant port is automatically removed from use by management functions and allocated to network functions to end the conflict.Type: GrantFiled: October 12, 2020Date of Patent: April 4, 2023Assignee: ADVA Optical Networking SEInventors: Robert LeRoy Lynch, David Stephen Griswold, Troy Anthony Swartz
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Publication number: 20210029035Abstract: Allowing a network function (such as a router, firewall or SD-WAN endpoint) or service chain of network functions to transparently access a network uplink, while also allowing a set of management entities to access the same link without interference or configuration. To the extent that a conflict arises between ports allocated to the management functions and to the network functions, the relevant port is automatically removed from use by management functions and allocated to network functions to end the conflict.Type: ApplicationFiled: October 12, 2020Publication date: January 28, 2021Inventors: Robert LeRoy Lynch, David Stephen Griswold, Troy Anthony Swartz
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Patent number: 7355965Abstract: Normal 802.3 Ethernet requires a tree topology. If a ring or a loop exists, then packets will be forwarded around the ring indefinitely. If the ring is broken, then there is no possibility of packets being propagated forever. This invention shows how to quickly impose a virtual break in the ring such that all nodes can communicate with each other, and how to remove the virtual break when a real failure occurs. This is accomplished by placing intelligent nodes on the ring that work together to virtually break and restore the ring. An embodiment is disclosed that handles a unidirectional break in a communication link where the unidirectional break is not sensed as an OPER DOWN state. This abstract is provided as an aid to those performing prior art searches and not a limitation on the scope of the claims.Type: GrantFiled: May 10, 2005Date of Patent: April 8, 2008Assignee: Overture Networks, Inc.Inventors: David Stephen Griswold, Prayson Will Pate, Robert Leroy Lynch, Glenn Russell Swope
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Patent number: 7339887Abstract: Normal 802.3 Ethernet requires a tree topology. If a ring or a loop exists, then packets will be forwarded around the ring indefinitely. If the ring is broken, then there is no possibility of packets being propagated forever. This invention shows how to quickly impose a virtual break in the ring such that all nodes can communicate with each other, and how to remove the virtual break when a real failure occurs. This is accomplished by placing intelligent nodes on the ring that work together to virtually break and restore the ring. An embodiment is disclosed that allows a ring node to bridge user traffic in the case that no switch table entry is present for that traffic. This abstract is provided as an aid to those performing prior art searches and not a limitation on the scope of the claims.Type: GrantFiled: July 13, 2005Date of Patent: March 4, 2008Assignee: Overture Networks, Inc.Inventors: David Stephen Griswold, Prayson Will Pate, Robert Leroy Lynch, Glenn Russell Swope
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Patent number: 6928050Abstract: Normal 802.3 Ethernet requires a tree topology. If a ring or a loop exists, then packets will be forwarded around the ring indefinitely. If the ring is broken, then there is no possibility of packets being propagated forever. This invention shows how to quickly impose a virtual break in the ring such that all nodes can communicate with each other, and how to remove the virtual break when a real failure occurs. This is accomplished by placing intelligent nodes on the ring that work together to virtually break and restore the ring. An embodiment is disclosed that handles a unidirectional break in a communication link. This abstract is provided as an aid to those performing prior art searches and not a limitation on the scope of the claims.Type: GrantFiled: May 6, 2004Date of Patent: August 9, 2005Assignee: Overture Networks, Inc.Inventors: Robert Leroy Lynch, David Stephen Griswold, Glenn Russell Swope, Prayson Will Pate
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Publication number: 20040223503Abstract: Normal 802.3 Ethernet requires a tree topology. If a ring or a loop exists, then packets will be forwarded around the ring indefinitely. If the ring is broken, then there is no possibility of packets being propagated forever. This invention shows how to quickly impose a virtual break in the ring such that all nodes can communicate with each other, and how to remove the virtual break when a real failure occurs. This is accomplished by placing intelligent nodes on the ring that work together to virtually break and restore the ring. An embodiment is disclosed that handles a unidirectional break in a communication link. This abstract is provided as an aid to those performing prior art searches and not a limitation on the scope of the claims.Type: ApplicationFiled: May 6, 2004Publication date: November 11, 2004Applicant: Overture Networks, Inc.Inventors: Robert Leroy Lynch, David Stephen Griswold, Glenn Russell Swope, Prayson Will Pate
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Patent number: 6768748Abstract: A system for optimally mapping circuits into packets based on round trip delay (RTD), and a system for measuring RTD for use in packet communications systems such as circuit emulation (CEM) systems is disclosed. The measured RTD value can be used in a system that adjusts packet size to reduce capture delay to partially offset an increase in RTD. As the use of smaller packets increases the overhead burden on the packet communication system, the packet size can be increased to reduce the overhead burden when the size of the current RTD becomes appropriately short. The disclosure also teaches the placement of data from two or more circuits destined for the same emulation endpoint into the same transmission packet in order to improve system performance. The abstract is a tool for finding relevant disclosures and not a limitation on the scope of the claims.Type: GrantFiled: July 26, 2002Date of Patent: July 27, 2004Assignee: Overture Networks, Inc.Inventors: Prayson Will Pate, Michael Joseph Poupard, Robert Leroy Lynch, David Stephen Griswold, Emily Jean Skinner
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Publication number: 20030091052Abstract: A system for optimally mapping circuits into packets based on round trip delay (RTD), and a system for measuring RTD for use in packet communications systems such as circuit emulation (CEM) systems is disclosed. The measured RTD value can be used in a system that adjusts packet size to reduce capture delay to partially offset an increase in RTD. As the use of smaller packets increases the overhead burden on the packet communication system, the packet size can be increased to reduce the overhead burden when the size of the current RTD becomes appropriately short. The disclosure also teaches the placement of data from two or more circuits destined for the same emulation endpoint into the same transmission packet in order to improve system performance. The abstract is a tool for finding relevant disclosures and not a limitation on the scope of the claims.Type: ApplicationFiled: July 26, 2002Publication date: May 15, 2003Applicant: Overture Networks, Inc.Inventors: Prayson Will Pate, Michael Joseph Poupard, Robert Leroy Lynch, David Stephen Griswold, Emily Jean Skinner