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Advanced Research in QoS and UPQ Assessment

Advanced Research in QoS and UPQ Assessment. Razvan Beuran Mihai Ivanovici March 2004. Outline. Background QoS Measurement TCP/IP Performance Analysis VoIP UPQ Assessment PIPPS Network Emulator project. UPQ. Loss. Throughput. Delay. Background. QoS testing and measuring

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Advanced Research in QoS and UPQ Assessment

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  1. Advanced Research in QoS and UPQ Assessment Razvan Beuran Mihai Ivanovici March 2004

  2. Outline • Background • QoS Measurement • TCP/IP Performance Analysis • VoIP UPQ Assessment • PIPPS Network Emulator project

  3. UPQ Loss Throughput Delay Background • QoS testing and measuring • Design & build QoS measuring system • Cost, flexibility, accuracy, long distance tests • Measure QoS parameters • User Perceived Quality (UPQ) assessment • Define UPQ metrics – application dependent • Quantify UPQ metrics • Study relationship with QoS parameters • Reproduce results • Enable decision taking

  4. Collaborations (I) • Degree2 Innovations (now U4EA) – 2002 • Testing and measuring QoS • Active QoS measurement (artificial traffic) • Passive QoS measurement (user oriented) • TG = traffic generator • MT = measurement tools • DUT = device under test • APP = application • SW = switch • UMT = user perception measurement tools

  5. Collaborations (II) • U4EA – 2003 • FlowFusion – GoS technology • Study its characteristics • TCP/IP (long-haul tests for ATLAS remote farms) • Quantify performance for various links • UPQ assessment for VoIP • Innovative methodology – study the perceived quality in regions of the loss-jitter space • Finalized by a technical report delivered to U4EA

  6. QoS Measurement – switches • Active QoS measurement • Studied scheduling algorithms • 8 different priorities

  7. Tested networks

  8. QoS Measurement – WAN • Tests performed using our Alteon Network Tester • NUT = Network Under Test

  9. TCP/IP Performance Analysis • Conference paper (SPECTS’03) • Lab tests, 100 Mbps • UPQ metrics for FTP over TCP/IP • Goodput • Transfer time performance • Relationship with QoS parameters (loss & delay) • Long-haul bulk data transfer using TCP/IP • Real networks tests, 1 Gbps • ATLAS remote farms • Memory to memory transfer using iperf

  10. VoIP UPQ Assessment (I) • Custom-designed measurement system • ITU-T PESQ score for UPQ quantification

  11. VoIP UPQ Assessment (II) • G.711 codec • 3D PESQ surface & horizontal sections

  12. Publications • M. Ivanovici, R. Beuran, N. Davies, B. Dobinson, “Evaluation of the Delivery QoS Characteristics of Gigabit Ethernet Switches”, to be submitted to QoFIS 2004, Barcelona, Spain. • R.Beuran, M. Ivanovici, “User-Perceived Quality Assessment for VoIP Applications”, technical report, January 2004. • R. Beuran, M. Ivanovici, B. Dobinson, N. Davies, P. Thompson, "Network Quality of Service Measurement System for Application Requirements Evaluation" , International Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS'03, Montreal, Canada, July 20-24, 2003, pp. 380-387. • M. J. LeVine, S. Stancu, Ch. Haeberli, L. Tremblet, R. Beuran, C. Meirosu, R. W. Dobinson, B. Martin, E. Knezo, H.-P. Beck, R. Hauser, D. Botterill, "Validation of the ATLAS Trigger/DAQ Network architecture using hardware data emulators", 13th IEEE Nuclear & Plasma Sciences Society Real Time Conference, Montreal, Canada, May 18-23, 2003. • K. Korcyl, G. Sladowski, R. Beuran, R. W. Dobinson, C. Meirosu, M. Ivanovici, M. L. Maia, "Network performance measurements as part of feasibility studies on moving part of the ATLAS Event Filter to off-site Institutes", First European Across Grids Conference, Santiago de Compostela, Spain, February 2003. • K. Korcyl, G. Sladowski, R. Beuran, R. W. Dobinson, C. Meirosu, M. Ivanovici, M. L. Maia, "Network performance measurements for massive data transfers between CERN Geneva and Cyfronet Cracow", Cracow Grid Workshop, Cracow, Poland, December 2002. • F. R. M. Barnes, R. Beuran, R.W. Dobinson, M.J. LeVine, B. Martin, J. Lokier, and C. Meirosu, "Testing Ethernet Networks for the ATLAS Data Collection System", IEEE Trans. Nucl. Sci. 49, No. 2, April 2002, pp. 516-520.

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