Broadband and Wireless Networking Activity

This activity deals with the performance evaluation of wired and wireless communication networks through modelling, analysis and simulation, and the development and evaluation of efficient resource management and traffic control mechanisms. Specific issues involve end-to-end Quality of Service (QoS) and service differentiation support over heterogeneous network technologies, charging of network transport services, traffic measurement and analysis, QoS and SLA (Service Level Agreement) monitoring, and seamless congestion control over wired and wireless networks.

In the area of congestion control for wired and wireless networks, we are investigating the application of economic modelling and congestion pricing for developing flexible, efficient, and robust mechanisms for resource control. The overall approach considers the use of a simple mechanism inside the network, such as Explicit Congestion Notification (ECN), for conveying congestion information to the end-systems, which respond independently based on their own requirements and needs. An important contribution we have made in this area is the extension of the above approach for wireless networks, including both 3^rd generation networks based on Wideband CDMA and Wireless LANs based IEEE 802.11. This work takes into account the particular characteristics of wireless technology, and developes a framework for seamless congestion control over wired and wireless network, which takes into account the cost of battery power consumption. Our other interests in the area of wireless networking and mobile computing includes mechanisms for supporting service differentiation, media access control algorithms, performance and modifications of TCP over heterogeneous networks, and multihop wireless networks.

Ongoing research projects include the following:

• Design, Management and Security of Wireless Networks with QoS Support (GSRT, 05 AKMVN 80)
• COST290: WiQoST – Traffic and QoS Management in Multimedia Wireless Networks (COST, ESF)
• Routing Protocols in Wireless Mesh Networks based on Cross-Layer Design (GSRT, Greek-Italian Cooperation 2005-2007)
• Efficient Design of IEEE 802.11e Wireless Access Networks (GSRT, Greek-USA Cooperation 2005-2007)
• Advanced Services over Wireless Access Networks for Visitors and Tourism Organisation in Crete – Wireless Information Service (CRETE-WISE)

Past projects (partial list)

• Future Wireless Network Architectures: Managing e2e QoS & Resource Control (Industrial, funded by British Telecommunications, UK)
• Achieving Service Differentiation and High Performance in IEEE 802.11 (National/GSRT)
• Denial of Service (DoS) Attack Detection and Mitigation (EU-IST Project SCAMPI: A Scaleable Monitoring Platform for the Internet, Grant from FORTHnet S.A.)
• Improved Services in Next Generation IP Networks (National/GSRT, FORTHnet S.A.)
• Resource Control for Wireless Networks (Industrial, funded by British Telecommunications, UK)
• M3I - Market Managed Multiservice Internet (EU - IST)
• TrACe - Traffic Measurement, Analysis, and Charging (National/GUnet)
• GRnet QoS (Industrial, GRnet S.A.)
• TRAFFIC (National/GSRT)
• MISA (EU - ACTS)
• REFORM (EU - ACTS)
• ITHACI (EU - ACTS)
• MONTAGE - Mobile Intelligent Agents in Accounting, Charging, and Personal Mobility Support (EU - ACTS)
• CASHMAN - Charging and Accounting Schemes in Multiservice Networks (EU - ACTS)
• TRAFFIC ENG.

Coordinator:Vasilios A. Siris,
Tel: +30 2810 391726
Email: vsiris "at" ics "dot" forth "dot" gr