Inventor · disambiguated record
Nicholas Duffield
Also filed as: DUFFIELD NICHOLAS · DUFFIELD NICHOLAS G · DUFFIELD NICHOLAS GEOFFREY
55 granted patents·5 pending applications·1,740 citations·filing 1997–2016
99Inventor score
Files withAT & T CORP13AT & T IP II LP12AT & T IP I LP11DUFFIELD NICHOLAS8DUFFIELD NICHOLAS GEOFFREY3
Top patents by PatentIndex Score
60 records- 0198US8228818B2Systems, methods, and devices for monitoring networksCHASE CHRISTOPHER J·Filed 2005·Granted Jul 24, 2012·272 cites·25 claims
- 0296US9680877B2Systems and methods for rule-based anomaly detection on IP network flowAT & T IP I LP·Filed 2015·Granted Jun 13, 2017·31 cites·3 claims
- 0396US9258217B2Systems and methods for rule-based anomaly detection on IP network flowDUFFIELD NICHOLAS·Filed 2009·Granted Feb 9, 2016·142 cites·6 claims
- 0496US6873600B1Consistent sampling for network traffic measurementAT & T CORP·Filed 2000·Granted Mar 29, 2005·211 cites·2 claims
- 0595US7424489B1Methods and apparatus for space efficient adaptive detection of multidimensional hierarchical heavy hittersAT & T CORP·Filed 2005·Granted Sep 9, 2008·40 cites·4 claims
- 0694US9860181B2System and method for inferring traffic legitimacy through selective impairmentAT & T IP II LP·Filed 2016·Granted Jan 2, 2018·9 cites·20 claims
- 0794US7536455B2Optimal combination of sampled measurementsAT & T CORP·Filed 2006·Granted May 19, 2009·30 cites·19 claims
- 0893US8031599B2Statistical, signature-based approach to IP traffic classificationAT & T IP II LP·Filed 2009·Granted Oct 4, 2011·29 cites·1 claims
- 0993US8001601B2Method and apparatus for large-scale automated distributed denial of service attack detectionAT & T IP II LP·Filed 2006·Granted Aug 16, 2011·40 cites·30 claims
- 1093US7852785B2Sampling and analyzing packets in a networkAT & T IP I LP·Filed 2008·Granted Dec 14, 2010·38 cites·20 claims
- 1192US8442827B2System and method for customized voice responseDUFFIELD NICHOLAS·Filed 2010·Granted May 14, 2013·14 cites·19 claims
- 1292US7924739B2Method and apparatus for one-way passive loss measurements using sampled flow statisticsAT & T IP I LP·Filed 2008·Granted Apr 12, 2011·25 cites·20 claims
- 1390US7953020B2Method for implementing and reporting one-way network measurementsAT & T IP II LP·Filed 2006·Granted May 31, 2011·21 cites·12 claims
- 1490US7630949B1System and method for inferring traffic legitimacy through selective impairmentAT & T CORP·Filed 2005·Granted Dec 8, 2009·18 cites·13 claims
- 1589US8311956B2Scalable traffic classifier and classifier training systemSEN SUBHABRATA·Filed 2009·Granted Nov 13, 2012·38 cites·12 claims
- 1689US6452933B1Fair queuing system with adaptive bandwidth redistributionLUCENT TECHNOLOGIES INC·Filed 1997·Granted Sep 17, 2002·202 cites·8 claims
- 1788US8028055B2Optimal combination of sampled measurementsAT & T IP II LP·Filed 2008·Granted Sep 27, 2011·13 cites·20 claims
- 1888US7299283B1Apparatus for size-dependent sampling for managing a data networkAT & T CORP·Filed 2006·Granted Nov 20, 2007·13 cites·9 claims
- 1986US7437385B1Methods and apparatus for detection of hierarchical heavy hittersAT & T CORP·Filed 2005·Granted Oct 14, 2008·12 cites·4 claims
- 2085US9407527B2System and method for inferring traffic legitimacy through selective impairmentAT & T IP II LP·Filed 2015·Granted Aug 2, 2016·2 cites·20 claims
- 2184US9349102B2Scalable traffic classifier and classifier training systemSEN SUBHABRATA·Filed 2012·Granted May 24, 2016·14 cites·20 claims
- 2284US7574506B1Traffic matrix estimation method and apparatusAT & T IP II LP·Filed 2007·Granted Aug 11, 2009·11 cites·10 claims
- 2384US7293086B1Traffic matrix estimation method and apparatusAT & T CORP·Filed 2003·Granted Nov 6, 2007·39 cites·10 claims
- 2484US6310857B1Method and apparatus for smoothing and multiplexing video data flowsAT & T CORP·Filed 1998·Granted Oct 30, 2001·144 cites·28 claims
- 2583US8477772B2System and method for determination of routing information in a networkGERBER ALEXANDRE·Filed 2008·Granted Jul 2, 2013·10 cites·14 claims
- 2683US8233402B2Multicast-based inference of temporal loss characteristics in packet data networksDUFFIELD NICHOLAS GEOFFREY·Filed 2007·Granted Jul 31, 2012·13 cites·10 claims
- 2783US7508769B1Consistent sampling for network traffic measurementAT & T IP II LP·Filed 2004·Granted Mar 24, 2009·35 cites·24 claims
- 2883US6912232B1Virtual private networkAT & T CORP·Filed 1999·Granted Jun 28, 2005·126 cites·30 claims
- 2982US9106550B2System and method for inferring traffic legitimacy through selective impairmentAT & T IP II LP·Filed 2014·Granted Aug 11, 2015·2 cites·20 claims
- 3082US7587761B2Adaptive defense against various network attacksAT & T CORP·Filed 2005·Granted Sep 8, 2009·15 cites·18 claims
- 3181US7990982B2Methods and apparatus to bound network traffic estimation error for multistage measurement sampling and aggregationAT & T IP I LP·Filed 2008·Granted Aug 2, 2011·9 cites·20 claims
- 3280US7080136B2Method and apparatus for size-dependent sampling for managing a data networkAT & T CORP·Filed 2002·Granted Jul 18, 2006·23 cites·44 claims
- 3379US8935188B2Method and apparatus for classifying applications using the collective properties of network traffic in a traffic activity graphDUFFIELD NICHOLAS·Filed 2010·Granted Jan 13, 2015·6 cites·20 claims
- 3479US7660248B1Statistical, signature-based approach to IP traffic classificationDUFFIELD NICHOLAS G·Filed 2004·Granted Feb 9, 2010·32 cites·1 claims
- 3577US7957315B2System and method for sampling network trafficAT & T IP II LP·Filed 2008·Granted Jun 7, 2011·6 cites·20 claims
- 3677US7197048B1Virtual private networkAT & T CORP·Filed 2004·Granted Mar 27, 2007·25 cites·8 claims
- 3776US8218451B2Methods and apparatus for detection of hierarchical heavy hittersDUFFIELD NICHOLAS·Filed 2011·Granted Jul 10, 2012·3 cites·20 claims
- 3871US8751431B2System and method for inferring traffic legitimacy through selective impairmentDUFFIELD NICHOLAS·Filed 2009·Granted Jun 10, 2014·2 cites·20 claims
- 3971US7898976B2Methods and apparatus for detection of hierarchical heavy hittersAT & T IP II LP·Filed 2008·Granted Mar 1, 2011·3 cites·20 claims
- 4069US8165019B2Indirect measurement methodology to infer routing changes using statistics of flow arrival processesBRESLAU LEE·Filed 2009·Granted Apr 24, 2012·4 cites·20 claims
- 4168US8005010B2Method and apparatus for providing performance measurement for a network tunnelAT & T IP I LP·Filed 2008·Granted Aug 23, 2011·3 cites·20 claims
- 4264US9116958B2Methods and apparatus to sample data connectionsAT & T IP I LP·Filed 2012·Granted Aug 25, 2015·1 cites·20 claims
- 4364US8064359B2System and method for spatially consistent sampling of flow records at constrained, content-dependent ratesDUFFIELD NICHOLAS·Filed 2008·Granted Nov 22, 2011·2 cites·17 claims
- 4464US7764625B2Algorithms and estimators for summarization of unaggregated data streamsAT & T IP I LP·Filed 2008·Granted Jul 27, 2010·2 cites·14 claims
- 4563US8811395B2System and method for determination of routing information in a networkAT & T IP I LP·Filed 2013·Granted Aug 19, 2014·1 cites·15 claims
- 4661US9343063B2System and method for customized voice responseAT & T IP I LP·Filed 2013·Granted May 17, 2016·1 cites·20 claims
- 4760US8121599B2System and method for inferring wireless trajectories in a cellular telephone networkGERBER ALEXANDRE·Filed 2008·Granted Feb 21, 2012·2 cites·18 claims
- 4860US8073945B2Method and apparatus for providing a measurement of performance for a networkSOMMERS JOEL·Filed 2008·Granted Dec 6, 2011·3 cites·20 claims
- 4959US9571366B2Method and apparatus for detecting and localizing an anomaly for a networkDUFFIELD NICHOLAS·Filed 2009·Granted Feb 14, 2017·2 cites·19 claims
- 5058US8005949B2Variance-optimal sampling-based estimation of subset sumsAT & T IP I LP·Filed 2008·Granted Aug 23, 2011·1 cites·17 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
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