Roger Knobbe - Torrance CA, US Stephen Schwab - Manhattan Beach CA, US Andrew Purtell - Northridge CA, US
Assignee:
Networks Associates Technology, Inc. - Santa Clara CA
International Classification:
H04L012/28
US Classification:
370252, 370234
Abstract:
A device that passively monitors arriving and departing data packets on one or more networks, correlates arriving data packets with departing data packets, and calculates a latency estimate based on the confidence of the correlation. The device detects and copies data packets arriving at a network device and the data packets departing from the same network device. A timestamp is stored for each arriving or departing data packet. Latency across a network device can be determined based on the timestamps for correlating data packets. Additionally, latency across a network device per protocol layer can also be calculated. Varying levels of confidence of a latency estimation depend on the operation necessarily performed on the data packet by the network device and the protocol level at which correlation between the arriving and departing data packets can be achieved.
System For Sharing Network State To Enhance Network Throughput
Andrew Purtell - Northridge CA, US Roger Knobbe - Torrance CA, US Stephen Schwab - Manhattan Beach CA, US
Assignee:
Networks Associates Technology, Inc. - Santa Clara CA
International Classification:
G06F011/30
US Classification:
713201, 713152, 370229, 370231, 370235, 370352
Abstract:
Two or more computers acting as firewalls share network state data to enhance throughput performance. A firewall creates a separate common TCP control block (CCB) for each group of TCP connections through the firewall having common endpoints. The CCB is a shared data structure comprising a single microstate shared across the group of TCP connections. Each such individual TCP connection has a TCP control block, which instead of a microstate, contains a pointer to the appropriate CCB. Preferably, each firewall receives CCBs from its peers and stores them. Each firewall preferably adjusts data traffic passing through it based on the CCBs stored within it. By adjusting traffic to reduce or eliminate congestion, throughput is enhanced.
Method And System For Efficient Packet Data Transport
Steven Wong - Long Beach CA Roger Knobbe - Torrance CA
Assignee:
Wonderware Corporation - Irvine CA
International Classification:
G06F 906
US Classification:
714708
Abstract:
A system and method for regulating data transmission between a source node and a destination node is disclosed herein. The present method contemplates monitoring system performance so as to detect when the system enters an overloaded state. Such detection may be effected by, for example, determining the extent of the time interval during which instructions are retained in a queue at the destination node awaiting execution. When this interval exceeds a maximum queuing time, the system is deemed to be in an overloaded state. Upon entry into an overloaded state, data transmission from the source node is suspended pending recovery of the system from the overloaded state. In a preferred implementation, overload probe messages are periodically inserted into a message queue at the destination node. When such an overload probe message is determined to have been retained in the message queue in excess of the maximum queuing time, the system is deemed to be in an overloaded state and data transmission is suspended as described above. If it is subsequently determined that an overload probe message has been retained in the message queue for less than the maximum queuing time, data transmission from the source node is resumed.
The Aerospace Corporation
Systems Director, Ocx Chief Engineer
The Aerospace Corporation Nov 2010 - Aug 2014
Systems Director
The Aerospace Corporation Jan 2007 - Dec 2010
Senior Project Lead
West Torrance Little League Sep 2004 - Sep 2007
Information Officer
Sparta Apr 2005 - Jan 2007
Senior Principal Investigator
Education:
Iowa State University 1982 - 1986
Bachelors, Bachelor of Science, Computer Science
Skills:
Security Systems Engineering Software Engineering System Architecture Network Security Information Assurance Space Systems Requirements Management Software Development Integration Dod Distributed Systems Linux Operating Systems Testing Military Networking C++ Unix System Design Configuration Management Engineering Management Technical Leadership Computer Security Architectures Satellite Spacecraft Perl Requirements Analysis Enterprise Architecture Solaris Embedded Software Defense Software Project Management Information Security Training Programming Databases Software Design Tcp/Ip Embedded Systems Python Earned Value Management Security Clearance Satellite Communications Agile Methodologies Aerospace
Interests:
Children
Certifications:
Cism Certified Information Security ManagerĀ® (Cism) License 1529115
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