The 15th ITC Specialist Seminar was concerned with Internet Traffic Engineering and Traffic Management and took place on July 22-24, 2002, Wuerzburg, Germany.

The success of future IP-based communication networks is heavily dependent on their ability to economically and reliably offer a range of quality services. Essential requirements are traffic management mechanisms capable of providing necessary Quality of Service (QoS) guarantees and traffic engineering procedures which ensure that these mechanisms are used in a costeffective way.
While it is increasingly recognized that traffic management and traffic engineering are complementary and mutually dependent functions, it is also clear that there remains a significant gap in our understanding of the best way to use them. For instance, while various queue management schemes provide service differentiation, it largely remains to specify how they can be configured and resources adequately provisioned to meet quantitative quality objectives. Complex service level agreements are being defined with little regard to the facility with which they can be honoured. IP traffic engineering still relies on routing algorithms which are, to say the least, quite primitive with respect to their ability to place traffic where capacity is available.
The objective of the seminar is to address these issues at the intersection of traffic management and traffic engineering. It provides a workshop setting for an exchange of ideas and results between researchers and practitioners in this area.

The program of the seminar hereafter reflected the main objectives:

Monday 22th July

9:00 - 10:45 Session 1: MPLS

A Graph-Theoretical Notation for the Construction of LSP Hierarchies
M. Menth, N. Hauck

Design and Implementation of an MPLS based Load Architecture for Web Switching
R. Dragos, S. Dragos, M. Collier

Label Switched Paths Re-configuration under Time-Varying Traffic Conditions
S. Bessler

11:15 - 12:15 Session 2: Routing

ALCFRA - A Robust Routing Algorithm Which Can Tolerate Imprecise Network State Information
K. Kowalik, M. Collier

A QoS-Aware Switching Mechanism Between The Two Modes of PIM-SM Multicast Routing Protocol
F. Filali, W. Dabbous

13:30 - 15:00 Session 3: Analytical Performance Models for IP Networks

Joint Distribution of Instantaneous and Averaged Queue Length in an M/M/1/K System
E. Kuumola, J. Resing, J. Virtamo

A Simple Model of a TCP Link
A. Arvidsson, A. Krzesinski

Modelling Integration of Streaming and Data Traffic
F. Delcoigne, A. Proutiere, G. Regnie

15:30 - 17:00 Panel Discussion

Tuesday 23th July

8:30 - 10:00 Session 4: TCP Performance

TCP NewVegas: Providing Good TCP Performance in both Homogeneous and Heterogeneous Environments
A. De Vendictis, M. Bonacci, A. Baiocchi

The Effect of the Initial Window Site and Limited Transmit Algorithm on the Transient Behaviour of TCP Transfers
U. Ayesta, K. Avrachenkov

Performance of TCP in the Presence of Correlated Loss
F. Guillemin, P. Robert, B. Zwart

10:30 -12:00 Session 5: IP Traffic Characterization and Management

Obtaining Reliable Bit Rate Measurements in SNMP-Managed Networks
P. Carlsson, M. Fiedler, K. Tutschku

Implicit Traffic Classification for Service Differentiation
Trivedi, Trussell, Nilsson, Chow

Observations in E-Mail Performance
J. Charzinski

13:30 -15:00 Session 6: Network Dimensioning and Network Performance

On the Configuration of Simulations of Large Network Models with HTTP/TCP Sources
K. Below, U. Killat

Optimal Performance Partitioning for Networks with Envelope-Regulated Traffic
A. Girard, C. Rosenberg, H. Cho

Analytical Network Dimensioning and Performance Evaluation of Packet-Switching Mobile Radio Networks
U. Vornefeld

15:30 - 17:00 Session 7: Routing-based IP Network Optimisation

Optimization of IP Routing by Link Cost Specification
S. Koehler, D. Staehle, U. Kohlhaas

Online Traffic Engineering with Design-Based Routing
I. Widjaja, I. Saniee, A. Elwalid, D. Mitra

An Alternative Genetic Algorithm to Optimze OSPF Weights
E. Mulyana, U. Killat

17:00 -18:00 Session 8: IP Traffic Description Techniques

A Poissonian Traffic Descriptor
D. Abendroth, U. Killat

3D-LD: a Graphical Wavelet-based Method for Analyzing Scaling Processes
S. Uhlig, O. Bonaventure, C. Rapier

Wednesday 24th July

8:30 - 10:00 Session 9: Traffic Estimation

New Modifications of the Exponential Moving Average Algorithm for Bandwidth Estimation
L. Burgstahler, M. Neubauer

Some Notes on Prediction of Teletraffic
P. Mannersalo

10:30 - 12:00 Session 10: Scheduling and Bandwidth Allocation

Call Admission Control with QoS Class Modification
T. Tsuchiya

High Performance Fair Bandwidth Allocation for Resilient Packet Rings
V. Gambiroza, Y. Liu, P. Yuan, E. Knightly

Size-based Scheduling with Differentiated Services to Improve Response Time of Highly Varying Flow Sizes
I. A. Rai, G. Urvoy-Keller, E. W. Biersack