Inventor
DUFFIELD NICHOLAS
US34 patents
⚠️ This page may combine multiple inventors who share the name “DUFFIELD NICHOLAS”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T IP I LP
10 patentsUS9680877B2Jun 13, 2017
Systems and methods for rule-based anomaly detection on IP network flow
AT & T IP I LP31 citations93
US7924739B2Apr 12, 2011
Method and apparatus for one-way passive loss measurements using sampled flow statistics
AT & T IP I LP25 citations92
US7852785B2Dec 14, 2010
Sampling and analyzing packets in a network
AT & T IP I LP38 citations91
US7990982B2Aug 2, 2011
Methods and apparatus to bound network traffic estimation error for multistage measurement sampling and aggregation
AT & T IP I LP9 citations84
US9343063B2May 17, 2016
System and method for customized voice response
AT & T IP I LP1 citations63
US8005010B2Aug 23, 2011
Method and apparatus for providing performance measurement for a network tunnel
AT & T IP I LP3 citations63
US7764625B2Jul 27, 2010
Algorithms and estimators for summarization of unaggregated data streams
AT & T IP I LP2 citations62
US10192547B2Jan 29, 2019
System and method for customized voice response
AT & T IP I LP0 citations52
US8005949B2Aug 23, 2011
Variance-optimal sampling-based estimation of subset sums
AT & T IP I LP1 citations52
US8811395B2Aug 19, 2014
System and method for determination of routing information in a network
AT & T IP I LP1 citations51
DUFFIELD NICHOLAS
7 patentsUS9258217B2Feb 9, 2016
Systems and methods for rule-based anomaly detection on IP network flow
DUFFIELD NICHOLAS142 citations97
US8442827B2May 14, 2013
System and method for customized voice response
DUFFIELD NICHOLAS14 citations92
US8935188B2Jan 13, 2015
Method and apparatus for classifying applications using the collective properties of network traffic in a traffic activity graph
DUFFIELD NICHOLAS6 citations72
US9571366B2Feb 14, 2017
Method and apparatus for detecting and localizing an anomaly for a network
DUFFIELD NICHOLAS2 citations67
US8218451B2Jul 10, 2012
Methods and apparatus for detection of hierarchical heavy hitters
DUFFIELD NICHOLAS3 citations62
US8064359B2Nov 22, 2011
System and method for spatially consistent sampling of flow records at constrained, content-dependent rates
DUFFIELD NICHOLAS2 citations61
US8751431B2Jun 10, 2014
System and method for inferring traffic legitimacy through selective impairment
DUFFIELD NICHOLAS2 citations54
AT & T IP II LP
6 patentsUS8001601B2Aug 16, 2011
Method and apparatus for large-scale automated distributed denial of service attack detection
AT & T IP II LP40 citations92
US9860181B2Jan 2, 2018
System and method for inferring traffic legitimacy through selective impairment
AT & T IP II LP9 citations84
US7957315B2Jun 7, 2011
System and method for sampling network traffic
AT & T IP II LP6 citations73
US9407527B2Aug 2, 2016
System and method for inferring traffic legitimacy through selective impairment
AT & T IP II LP2 citations63
US7898976B2Mar 1, 2011
Methods and apparatus for detection of hierarchical heavy hitters
AT & T IP II LP3 citations63
US7746808B2Jun 29, 2010
Algorithms and estimators for summarization of unaggregated data streams
AT & T IP II LP0 citations41
AT & T CORP
4 patentsUS7630949B1Dec 8, 2009
System and method for inferring traffic legitimacy through selective impairment
AT & T CORP18 citations93
US7424489B1Sep 9, 2008
Methods and apparatus for space efficient adaptive detection of multidimensional hierarchical heavy hitters
AT & T CORP40 citations93
US7437385B1Oct 14, 2008
Methods and apparatus for detection of hierarchical heavy hitters
AT & T CORP12 citations84
US7587761B2Sep 8, 2009
Adaptive defense against various network attacks
AT & T CORP15 citations80