1 QoS on Best-effort IP Networks Les Cottrell – SLAC www.slac.stanford.edu/grp/scs/net/talk/qos-itu-apr01/ Presented at the Joint SG13/SG16 Workshop Panel.

Slides:

Advertisements

Similar presentations

Welcome to Who Wants to be a Millionaire

Advertisements

EE384Y: Packet Switch Architectures

Surveyor IP Performance Measurements Matt Zekauskas June, 1999 NLANR/I2 Joint Techs.

Lee, Seungjun ( ) Korea Advanced Institute of Science and Technology August 28, 2003 APAN Measurement WG meeting eTOP End-to-end.

Helping TCP Work at Gbps Cheng Jin the FAST project at Caltech

VoIP Models for System Performance Evaluation Farooq Khan IEEE Interim Meeting Vancouver, BC, Canada January 12-16, 2004.

All Rights Reserved, Copyright(C) 2007, Hitachi, Ltd. 1 Transport-layer optimization for thin-client systems Yukio OGAWA Systems Development Laboratory,

1 Measurement Study of Low-bitrate Internet Video Streaming Dmitri Loguinov Hayder Radha City University of New York and Philips Research.

International Telecommunication Union Workshop on End-to-End Quality of Service.What is it? How do we get it? Geneva, 1-3 October 2003 Are Existing Performance.

Thema: Menü Ansicht, Master, Folien-Master 1 ITU - IP Telephony Workshop June Standards for IP-telephony P.A.Probst, External Relations Swisscom.

Workshop on Multimedia Convergence (Geneva, March 2002) Presented by Fabio Bigi (Workshop Coordinator) 1.

Welcome to Who Wants to be a Millionaire

2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt Time Money AdditionSubtraction.

School Shop. Welcome to my shop. You have 10p How much change will you get? 7p 3p change.

Who Wants To Be A Millionaire?

Who Wants To Be A Millionaire? Mrs Mances Edition.

I can interpret intervals on partially numbered scales and record readings accurately ? 15 ? 45 ? 25 ? 37 ? 53 ? 64 Each little mark.

£1 Million £500,000 £250,000 £125,000 £64,000 £32,000 £16,000 £8,000 £4,000 £2,000 £1,000 £500 £300 £200 £100 Welcome.

Welcome to Who Wants to be a Millionaire

Welcome to Who Wants to be a Millionaire

Welcome to Who Wants to be a Millionaire

Voice over IP By: Adiel AKPLOGAN CAFE Informatique S. A. - TOGO - Web:

Streaming Video over the Internet

Mental Math Math Team Skills Test 20-Question Sample.

Who Wants To Be A Millionaire? Mrs Mance’s Edition.

Sequence Quickies 1  ORB Education. Visit for the other resources in this pack.

1 School of Computing Science Simon Fraser University CMPT 771/471: Internet Architecture & Protocols TCP-Friendly Transport Protocols.

OPEN DAYS B11 Creating synergies between EU funds: demographic change and active ageing in European Territorial Cooperation and the ESF 9 October.

The Global Village The world is a crowded place. As of today the world’s population is 6,600,000, countries have more that 50 million people. 11.

$1 Million $500,000 $250,000 $125,000 $64,000 $32,000 $16,000 $8,000 $4,000 $2,000 $1,000 $500 $300 $200 $100 Welcome.

Geolocation Les Cottrell – SLAC University of Helwan / Egypt, Sept 18 – Oct 3, 2010 Partially funded by DOE/MICS Field Work Proposal on Internet End-to-end.

1 Traceanal: a tool for analyzing and representing traceroutes Les Cottrell, Connie Logg, Ruchi Gupta, Jiri Navratil SLAC, for the E2Epi BOF, Columbus.

1 SLAC Internet Measurement Data Les Cottrell, Jerrod Williams, Connie Logg, Paola Grosso SLAC, for the ISMA Workshop, SDSC June,

1 Quantifying the Digital Divide from Within and Without Les Cottrell, SLAC Internet2 Members Meeting SIG on Hard to Reach Network Places, Washington,

1 Network Monitoring for SCIC Les Cottrell, SLAC For ICFA meeting September, 2005 Initially funded by DoE Field Work proposal. Currently partially funded.

1 PingER: Methodology, Uses & Results Les Cottrell SLAC, Warren Matthews GATech Extending the Reach of Advanced Networking: Special International Workshop.

1 ICFA/SCIC Network Monitoring Prepared by Les Cottrell, SLAC, for ICFA

Network Monitoring grid network performance measurement, simulation & analysis Presented by Warren Matthews at the Performance.

Reading Report 14 Yin Chen 14 Apr 2004 Reference: Internet Service Performance: Data Analysis and Visualization, Cross-Industry Working Team, July, 2000.

1 Monitoring Internet connectivity of Research and Educational Institutions Les Cottrell – SLAC/Stanford University Prepared for the workshop on “Developing.

ICFA/SCIC Monitoring WG Les Cottrell – SLAC representing the ICFA/SCIC Monitoring WG Prepared for the ICFA-SCIC, phone meeting, Jan 15, 2003

1-800-CALL-H.E.P. Warren Matthews Les Cottrell Rebecca Nitzan

1 Internet Performance Monitoring Update Les Cottrell & Warren Matthews – SLAC Presented at the.

1 How is the Internet Performing? Les Cottrell – SLAC Lecture # 2 presented at the 26 th International Nathiagali Summer College on Physics and Contemporary.

1 ESnet/HENP Active Internet End-to-end Performance & ESnet/University performance Les Cottrell – SLAC Presented at the ESSC meeting Albuquerque, August.

1 The PingER Project: Measuring the Digital Divide PingER Presented by Les Cottrell, SLAC At the SIS Show Palexpo/Geneva December 2003.

1 Measurements of Internet performance for NIIT, Pakistan Jan – Feb 2004 PingER From Les Cottrell, SLAC For presentation by Prof. Arshad Ali, NIIT.

1 Measuring The Digital Divide Prepared by: Les Cottrell SLAC, Shahryar Khan NIIT/SLAC, Jared Greeno SLAC, Qasim Lone NIIT/SLAC Presentation to Princess.

1 Internet End-to-end Monitoring Project - Overview Les Cottrell – SLAC/Stanford University Partially funded by DOE/MICS Field Work Proposal on Internet.

1 Quantifying the Digital Divide: focus Africa Prepared by Les Cottrell, SLAC for the NSF IRNC meeting, March 11,

1 Passive and Active Monitoring on a High-performance Network Les Cottrell, Warren Matthews, Davide Salomoni, Connie Logg – SLAC

1 IEPM/PingER Project Les Cottrell, SLAC DoE 2004 PI Network Research Meeting, FNAL Sep ‘04

1 Internet Performance Monitoring for the HENP Community Les Cottrell & Warren Matthews – SLAC Presented.

3/4/981 Internet Telephony & Internet Performance Issues Les Cottrell SLACSLAC Presented at the XIWT/IPWT meeting San Jose February 4th, 1998 Partially.

Internet Connectivity and Performance for the HEP Community. Presented at HEPNT-HEPiX, October 6, 1999 by Warren Matthews Funded by DOE/MICS Internet End-to-end.

Navigating PingER Les Cottrell – SLAC Presented at the Optimization Technologies for Low-Bandwidth Networks, ICTP Workshop,

1 PingER performance to Bangladesh Prepared by Les Cottrell, SLAC for Prof. Hilda Cerdeira May 27, 2004 Partially funded by DOE/MICS Field Work Proposal.

1 IEPM / PingER project & PPDG Les Cottrell – SLAC Presented at the NGI workshop, Berkeley, 7/21/99 Partially funded by DOE/MICS Field Work Proposal on.

1 Quantifying the Digital Divide Prepared by Les Cottrell, SLAC for the Internet2/World Bank meeting, Feb 7,

1 PingER6 Preliminary PingER Monitoring Results from the 6Bone/6REN. Warren Matthews Les Cottrell.

Pinger and IEPM-BW activity at FNAL By Frank Nagy FTP/CCF Computing Division Fermilab.

BOF Discussion: Uploading IEPM-BW data to MonALISA

The PingER Project: Measuring the Digital Divide

Wide Area Networking at SLAC, Feb ‘03

Digital Divide and PingER

E-business & E-commerce

Navigating PingER Les Cottrell – SLAC

PingER: An Effort to Quantify the Digital Divide

Advanced Networking Collaborations at SLAC

The PingER Project: Measuring the Digital Divide

Presentation transcript:

1 QoS on Best-effort IP Networks Les Cottrell – SLAC Presented at the Joint SG13/SG16 Workshop Panel Session: "Achieving Multimedia QOS over IP-Based Networks" part of the ITU-T SG13/SG16 Workshop on IP Networking and Mediacom 2004, Geneva, Switzerland, April 25-27, 2001 Partially funded by DOE/MICS Field Work Proposal on Internet End-to-end Performance Monitoring (IEPM), also supported by IUPAP

2 Overview Measurement methodology Delay Loss Jitter Availability Summary

3 PingER Measurements from –32 monitors in 14 countries –Over 600 remote hosts –Over 72 countries –Over 3300 monitor-remote site pairs –Measurements go back to Jan-95 –Reports on RTT, loss, reachability, jitter, reorders, duplicates … Uses ubiquitous ping facility of TCP/IP Countries monitored –Contain 78% of world population –99% of online users of Internet

4 RTT from ESnet to Groups of Sites ITU G ms RTT limit for voice 20%/year RTT ~ distance/(0.6*c) + hops * router delay Router delay = queuing + clocking in & out + processing

5 RTT Region to Region OK White 0-64ms Green ms Yellow ms NOT OK Pink ms Red > 512ms OK within regions, N. America OK with Europe, Japan

6 RTT from California to world Longitude (degrees) 300ms RTT (ms.) Frequency RTT (ms) Source = Palo Alto CA, W. Coast E. Coast US W. Coast US Europe & S. America Europe 3*0.6c Brazil E. Coast Data from CAIDA Skitter project

7 Loss seen from US to groups of Sites ETSI DTR/TIPHON V1.2.5 threshold for good speech 50% improvement / year

8 Loss to world from US Using year 2000, fraction of worlds population/country from

9 Losses between Regions

10 Jitter from N. America to W. Europe Jitter = IQR(ipdv), where ipdv(i) =RTT(i) – RTT(i-1) 214 pairs ETSI: DTR/TIPHON V1.2.5 ( ) good speech < 75ms jitter

11 Jitter between regions 75ms=Good 125ms=Med225ms=Poor ETSI: DTR/TIPHON V1.2.5 ( ) Jitter varies with loading

12 SLAC-CERN Jitter ETSI/TIPHON delay jitter threshold (75 ms)

13 Availability – Outage Probability Surveyor probes randomly 2/second Measure time (Outage length) consecutive probes dont get through Heavy tailed outage lengths (packet loss not Poisson)

14 More Information This talk: – IEPM/PingER home site –www-iepm.slac.stanford.edu/www-iepm.slac.stanford.edu/