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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 - PowerPoint PPT Presentation
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Advanced Research in QoS and UPQ Assessment
Razvan Beuran
Mihai IvanoviciMarch 2004
Outline
Background QoS Measurement TCP/IP Performance Analysis VoIP UPQ Assessment PIPPS Network Emulator project
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
DelayThroughput
Loss
UPQ
Collaborations (I)
Degree2 Innovations (now U4EA) – 2002 Testing and measuring QoS
Active QoS measurement (artificial traffic)
Passive QoS measurement (user oriented)
TG & MT
TG & MT
DUT
SW SW DUT APP APP
MT
UMT
TG = traffic generatorMT = measurement toolsDUT = device under test
APP = applicationSW = switchUMT = user perception measurement tools
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
QoS Measurement – switches
Active QoS measurement Studied scheduling
algorithms 8 different priorities
Tested networks
QoS Measurement – WAN
Tests performed using our Alteon Network Tester NUT = Network Under Test
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
VoIP UPQ Assessment (I)
Custom-designed measurement system ITU-T PESQ score for UPQ quantification
VoIP UPQ Assessment (II)
G.711 codec 3D PESQ surface & horizontal sections
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.