Patents by Inventor Everett A. Corl, Jr.
Everett A. Corl, Jr. 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: 8005989Abstract: The classification system of a network device includes a cache in which a mapping between predefined characteristics of TCP/IP packets and associated actions are stored in response to the first “Frequent Flyer” packet in of a session. Selected characteristics from subsequent received packets of that session are correlated with the predefined characteristics and the stored actions are applied to the received packets if the selected characteristics and the predefined characteristics match, thus reducing the processing required for subsequent packets. The packets selected for caching may be data packets. For mismatched characteristics, the full packet search of the classification system is used to determine the action to apply to the received packet.Type: GrantFiled: August 8, 2008Date of Patent: August 23, 2011Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Clark D. Jeffries, Natarajan Vaidhyanathan, Colin B. Verrilli
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Patent number: 8005869Abstract: Method for compressing search tree structures used in rule classification is provided. The method includes classifying packets based on filter rules, compressing a tree structure comprising multiple levels of single bit test nodes and leaf nodes, storing the compressed tree structure in a first memory structure of a storage such that the multiple levels of single bit test nodes and leaf nodes can be accessed from the first memory structure through a single memory access of the storage, collecting single bit test nodes of the tree structure that are in a lowest level of the tree structure, storing only the collected single bit test nodes within a second memory structure of the storage that is contiguous to the first memory structure, collecting leaf nodes of the tree structure, and storing only the collected leaf nodes within a third memory structure of the storage that is contiguous to second memory structure.Type: GrantFiled: March 14, 2008Date of Patent: August 23, 2011Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7941390Abstract: The present invention relates to a system for managing a plurality of multi-field classification rules. The system provides a first table that includes a plurality of entries corresponding to a plurality of rules relating to an ingress context and a second table that includes a plurality of entries corresponding to a plurality of rules relating to an egress context. The system also includes a network processor for classifying packets of information, wherein the network processor is programmed to utilize the first table and the second table to identify any rules relating to the ingress context and any one rules relating to the egress context that match a search key.Type: GrantFiled: June 20, 2008Date of Patent: May 10, 2011Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco C. Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7937355Abstract: The present invention relates to a method and computer system device for applying a plurality of rules to data packets within a network computer system. A filter rule decision tree is updated by adding or deleting a rule. If deleting a filter rule then the decision tree is provided to a network data plane processor with an incremental delete of the filter rule. If adding a filter rule then either providing an incremental insertion of the filter rule to the decision tree or rebuilding the first decision tree into a second decision tree responsive to comparing a parameter to a threshold. In one embodiment the parameter and thresholds relate to depth values of the tree filter rule chained branches. In another the parameter and thresholds relate to a total count of rule additions since a building of the relevant tree.Type: GrantFiled: December 3, 2008Date of Patent: May 3, 2011Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Clark D. Jeffries
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Patent number: 7752155Abstract: The present invention relates to a system and computer-readable medium for storing a plurality of multi-field classification rules in a computer system. Each multi-field classification rule includes a rule specification that itself includes a plurality of fields and a plurality of field definitions corresponding to the fields. The method of the present invention includes providing a virtual rule table, where the table stores a plurality of field definitions, and for each of the plurality of multi-field classification rules, compressing the rule specification by replacing at least one field definition with an associated index into the virtual rule table. The method also includes storing each of the compressed rule specifications and the virtual rule table in a shared segment of memory.Type: GrantFiled: July 29, 2008Date of Patent: July 6, 2010Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco C. Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7710874Abstract: A process control method and system including partitioning transmit decisions and certain measurements into one logical entity (Data Plane) and partitioning algorithm computation to update transmit probabilities into a second logical entity (Control Plane), the two entities periodically communicating fresh measurements from Data Plane to Control Plane and adjusted transmit probabilities from Control Plane to Data Plane. The transmit probability may be used in transmit/discard decisions of packets or instructions exercised at every arrival of a packet or instruction. In an alternative embodiment, the transmit probability may be used in transmit/delay decisions of awaiting instructions or packets exercised at every service event.Type: GrantFiled: June 4, 2003Date of Patent: May 4, 2010Assignee: International Business Machines CorporationInventors: Ganesh Balakrishnan, Everett A. Corl, Jr., Clark D. Jeffries, Ravinder K. Sabhikhi, Michael S. Siegel, Raj K. Singh, Rama M. Yedavalli
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Patent number: 7546281Abstract: A system for reducing the size of a database includes a memory in which the database configured in a ternary matrix array structure is stored. A processor executing at least one reduction algorithm scans the database tagging superfluous entries that are subsequently deleted. The tagging and deleting are done in such a way that the logical contents of the original database is unchanged, even though the size of the database is reduced.Type: GrantFiled: August 23, 2006Date of Patent: June 9, 2009Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Clark D. Jeffries, Brooks Johnston, Plyush C. Patel, Jan Van Lunteren
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Publication number: 20090083209Abstract: The present invention relates to a method and computer system device for applying a plurality of rules to data packets within a network computer system. A filter rule decision tree is updated by adding or deleting a rule. If deleting a filter rule then the decision tree is provided to a network data plane processor with an incremental delete of the filter rule. If adding a filter rule then either providing an incremental insertion of the filter rule to the decision tree or rebuilding the first decision tree into a second decision tree responsive to comparing a parameter to a threshold. In one embodiment the parameter and thresholds relate to depth values of the tree filter rule chained branches. In another the parameter and thresholds relate to a total count of rule additions since a building of the relevant tree.Type: ApplicationFiled: December 3, 2008Publication date: March 26, 2009Applicant: International Business Machines CorporationInventors: Everett A. Corl, JR., Gordon T. Davis, Clark D. Jeffries
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Patent number: 7478426Abstract: The present invention relates to a method and computer system device for applying a plurality of rules to data packets within a network computer system. A filter rule decision tree is updated by adding or deleting a rule. If deleting a filter rule then the decision tree is provided to a network data plane processor with an incremental delete of the filter rule. If adding a filter rule then either providing an incremental insertion of the filter rule to the decision tree or rebuilding the first decision tree into a second decision tree responsive to comparing a parameter to a threshold. In one embodiment the parameter and thresholds relate to depth values of the tree filter rule chained branches. In another the parameter and thresholds relate to a total count of rule additions since a building of the relevant tree.Type: GrantFiled: July 20, 2004Date of Patent: January 13, 2009Assignee: International Busines Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Clark D. Jeffries
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Patent number: 7464181Abstract: The classification system of a network device includes a cache in which a mapping between predefined characteristics of TCP/IP packets and associated actions are stored in response to the first “Frequent Flyer” packet in of a session. Selected characteristics from subsequent received packets of that session are correlated with the predefined characteristics and the stored actions are applied to the received packets if the selected characteristics and the predefined characteristics match, thus reducing the processing required for subsequent packets. The packets selected for caching may be data packets. For mismatched characteristics, the full packet search of the classification system is used to determine the action to apply to the received packet.Type: GrantFiled: September 11, 2003Date of Patent: December 9, 2008Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Clark D. Jeffries, Natarajan Vaidhyanathan, Colin B. Verrilli
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Publication number: 20080298244Abstract: The classification system of a network device includes a cache in which a mapping between predefined characteristics of TCP/IP packets and associated actions are stored in response to the first “Frequent Flyer” packet in of a session. Selected characteristics from subsequent received packets of that session are correlated with the predefined characteristics and the stored actions are applied to the received packets if the selected characteristics and the predefined characteristics match, thus reducing the processing required for subsequent packets. The packets selected for caching may be data packets. For mismatched characteristics, the full packet search of the classification system is used to determine the action to apply to the received packet.Type: ApplicationFiled: August 8, 2008Publication date: December 4, 2008Applicant: International Business Machines CorporationInventors: Everett A. Corl, JR., Gordon T. Davis, Clark D. Jeffries, Natarajan Vaidhyanathan, Colin B. Verrilli
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Publication number: 20080285454Abstract: The present invention relates to a system for storing a plurality of multi-field classification rules in a computer system. Each multi-field classification rule includes a rule specification that itself includes a plurality of fields and a plurality of field definitions corresponding to the fields.Type: ApplicationFiled: July 29, 2008Publication date: November 20, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Everett A. CORL, JR., Gordon T. Davis, Marco C. Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7454396Abstract: The present invention relates to a method for storing a plurality of multi-field classification rules in a computer system. Each multi-field classification rule includes a rule specification that itself includes a plurality of fields and a plurality of field definitions corresponding to the fields. The method of the present invention includes providing a virtual rule table, where the table stores a plurality of field definitions, and for each of the plurality of multi-field classification rules, compressing the rule specification by replacing at least one field definition with an associated index into the virtual rule table. The method also includes storing each of the compressed rule specifications and the virtual rule table in a shared segment of memory.Type: GrantFiled: April 27, 2004Date of Patent: November 18, 2008Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7412431Abstract: The present invention relates to a method for managing a plurality of multi-field classification rules. The method includes providing a first table that includes a plurality of entries corresponding to a plurality of rules relating to an ingress context and providing a second table that includes a plurality of entries corresponding to a plurality of rules relating to an egress context. The method also includes utilizing the first table and the second table to identify any rules relating to the ingress context and any rules relating to the egress context that match a search key.Type: GrantFiled: April 27, 2004Date of Patent: August 12, 2008Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco Heddes, Piyush C. Patel, Ravinder K. Sabhikhi
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Patent number: 7366728Abstract: The present invention relates to a method and system for compressing a tree structure. The method of the present invention includes providing a compressed format block for representing a plurality of levels of the tree structure, where the plurality of levels comprises a set of nodes. The method also includes compressing each node in the set of nodes into the compressed format block, such that the plurality of levels is traversed in a single memory access.Type: GrantFiled: April 27, 2004Date of Patent: April 29, 2008Assignee: International Business Machines CorporationInventors: Everett A. Corl, Jr., Gordon T. Davis, Marco Heddes, Piyush C. Patel, Ravinder K. Sabhikhi