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Copyright © 2005 Department of Computer Science CPSC 641 Winter 20111 Self-Similarity in WAN Traffic A subsequent paper established the presence of network traffic self-similarity in wide area Internet traffic as well “Wide Area Traffic: The Failure of Poisson Modeling”, by Vern Paxson and Sally Floyd, ACM SIGCOMM 1994 Their original intent was to show that self-similarity is not present in WAN traffic, but they failed! Self-similarity is present in WAN traffic Identified where it appears and where it does not Identifies limitations of Poisson models
Copyright © 2005 Department of Computer Science CPSC 641 Winter 20112 Main Contributions Identified presence of self-similarity property in Internet traffic Defined methodology for testing for the presence of self-similarity, and for testing the goodness of Poisson models Identified importance of “heavy tails” Proposed explanations/models for SS Proposed complete model for telnet
Copyright © 2005 Department of Computer Science CPSC 641 Winter 20113 Measurement Study Detailed measurement study of very lengthy Internet packet traces, with high resolution timer, and lots of storage space Traces range from 1 hour to 30 days in duration Millions of TCP packets and connections Several different sites
Copyright © 2005 Department of Computer Science CPSC 641 Winter 20114 Data Analysis Detailed statistical analysis: –connection interarrivals, per application analysis, packet level, connection level, tests for Poisson- ness, models, evaluation,... Very rigourous: confidence intervals, sophisticated statistical tests, sound methodology,... A wonderful paper to read
Copyright © 2005 Department of Computer Science CPSC 641 Winter 20115 Main Results Connection arrivals for telnet appear to be Poisson, but... Packet arrivals are definitely not Poisson Connection arrivals for ftp and other applications do not appear to be Poisson Traffic exhibits long range dependence and other aspects of self-similarity
Copyright © 2005 Department of Computer Science CPSC 641 Winter 20116 Conclusions Self-similarity is present in aggregate WAN Internet traffic Poisson models (or Markovian models of any sort) do not capture reality at all (except possibly for telnet connection arrivals) Important to consider self-similar traffic
Estimation and identification of long-range dependence in Internet traffic Thomas Karagiannis University of California,
Connection-level Analysis and Modeling of Network Traffic understanding the cause of bursts control and improve performance detect changes of network state.
Doc.: IEEE /1216r1 Submission November 2009 BroadcomSlide 1 Internet Traffic Modeling Date: Authors: NameAffiliationsAddressPhone .
Copyright © 2005 Department of Computer Science CPSC 641 Winter Self-Similar Network Traffic The original paper on network traffic self-similarity.
Copyright JNT Association JANET Briefing, 20 th Jan, Digital Economy Act 2010 Andrew Cormack Chief Regulatory Adviser, JANET(UK)
Speaker: Yu-Fu Huang Advisor: Dr. Kai-Wei Ke Date : 2014, Mar. 17 A page-oriented WWW traffic model for wireless system simulations.
A First Look at Modern Enterprise Traffic
An Analytical Model for Network Flow Analysis Ernesto Gomez, Yasha Karant, Keith Schubert Institute for Applied Supercomputing Department of Computer Science.
2014 Examples of Traffic. Video Video Traffic (High Definition) –30 frames per second –Frame format: 1920x1080 pixels –24 bits per pixel Required rate:
Assignment #3 Probability Ideas & Graphing Tools Sunday Sept 17, 11:55pm.
1 Network Traffic Measurement and Modeling Carey Williamson Department of Computer Science University of Calgary.
1 LAN Traffic Measurements Carey Williamson Department of Computer Science University of Calgary.
1 Self-Similar Wide Area Network Traffic Carey Williamson University of Calgary.
An Empirical Study of Real Audio Traffic A. Mena and J. Heidemann USC/Information Sciences Institute In Proceedings of IEEE Infocom Tel-Aviv, Israel March.
End-to-End Routing Behavior in the Internet Vern Paxson Presented by Zhichun Li.
1 Self-Similar Ethernet LAN Traffic Carey Williamson University of Calgary.
CMPT 855Module Network Traffic Self-Similarity Carey Williamson Department of Computer Science University of Saskatchewan.
On the Self-Similar Nature of Ethernet Traffic - Leland, et. Al Presented by Sumitra Ganesh.
Observed Structure of Addresses in IP Traffic CSCI 780, Fall 2005.
Copyright © 2005 Department of Computer Science CPSC 641 Winter WAN Traffic Measurements There have been several studies of wide area network traffic.
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