System Architecture and Networking (SAN)

Eindhoven University of Technology


COnverged MEssaging Techology (COMET) is a consortium funded by the European Commission 6th Framework Programme (FP6).

The recently introduced IP Multimedia Subsystem is an NGN architectural framework and an industry initiative that was taken to improve the quality of the services provided by telecom operators. The aim of the COMET project is to define and implement a Converged Messaging framework based on IMS in order to exchange messages between new and existing message domains anytime and anyplace, irrespective of network technology or device used.




SAN Contribution

SAN group is mainly focused on two research aspects within the COMET project:

1) COMET architecture quality evaluation and improvement by transformation:

The target is to develop a tool for providing automated support for improving quality properties of COMET component architecture at the architecture level prior to the deployment phase.


2) Management of quality for the provided services:

IMS standard enables non-dedicated, unlicensed and uncontrollable access networks (e.g. WiFi, xDSL) to be used when accessing IMS services. Therefore, guaranteed QoS may not be achievable in the IMS network. Here, the target is to enhance the end-to-end quality of services provided by real-time quality adaptation according to user's preferences, context and resource availability.


Recent Scientific Output

  Journal and Conference Publications
  1. Igor Radovanovic, Johan Lukkien, Shudong Chen, Chris Molanus, Tanir Ozcelebi, "Virtual Community Management for Enabling P2P Services in the IMS Network,", to appear in IEEE IMSAA 2008, Bangalore, India, December 2008.

  2. Tanir Ozcelebi, Igor Radovanovic, Debraj Sengupta, "Real-Time Resource Availability Signaling in IP Multimedia Subsystem Networks," Journal of Service Science and Management, vol. 2: pp: 128-134, June 2008.

  3. Tanir Ozcelebi, Igor Radovanovic, "Enhancing End-to-End Quality of Real Time Multimedia Services in Converged Networks," submitted.

  4. Igor Radovanovic, Jari Ala-Ruona, Wim Wedershoven, Tanir Ozcelebi, "Towards a Converged Messaging Service," to appear in ICT-MobileSummit, Stockholm, Sweden, June 2008.

  5. Tanir Ozcelebi, Igor Radovanovic, "Multimedia Adaptation with SIP Resource Availability Signalling in IMS-Networks," in Proceedings of IEEE ICCIT, Korea, November 2007.

  6. Igor Radovanovic, Amit Ray, Johan Lukkien, Michel Chaudron, "Facilitating Mobile Service Provisioning in IP Multimedia Subsystem (IMS) Using Service Oriented Architecture," in Proceedings ICSOC 2007, 5th Int. Conf on Service-Oriented Computing - ICSOC 2007, B. J. Krämer, K-J Lin, P. Narasimhan (Eds.), LNCS 4749,  Springer 2007, Vienna, Austria, September 17-20, 2007.

  7. Tanir Ozcelebi, Igor Radovanovic, Johan Lukkien, "Real-Time Resource Availability Signalling in IMS-Based Networks," in Proceedings of IEEE WICOM, Shanghai, China, September 2007.

  8. Ferdian Maswar, Michel Chaudron, Igor Radovanovic, "Improving Architectural Quality Properties Through Model Transformation," Int. Conf. on Software Engineering Research and Practice (SERP'07), June 25-28, Las Vegas, USA, 2007.

  9. Tanir Ozcelebi, Igor Radovanovic, Michel Chaudron, "Enhancing End-to-End QoS for Multimedia Streaming in IMS Based Networks," in Proceedings of IEEE ICSNC 2007, Cap Esterel, French Riviera, France, August 2007.



  1. W. Wedershoven, K. Wijbrans, H. Carr, M. de Boer, I. Radovanovic, T. Ozcelebi, "A Communication Method and System," Provisional Patent Application – Ireland (2007/0569)/ USA (60/935369), pending.



  System Architecture and Networking

  Eindhoven University of Technology


Last update: 09/07/2008