Scalable, efficient and flexible next generation
converged mobile, wireless and fixed access networks

Subproject SYMPATHIE:
System-wide control
with scalable protocol architectures
for high-rate, mobile access networks

SYMPATHIE is managed and financed by
Nokia Siemens Networks GmbH & Co KG


Computer Networks and Internet, University of Tübingen

Team leaders:

Prof. Dr. Georg Carle
Marc Fouquet

Staff members:

Dr. Christian Hoene
Andreas Klenk
Ali Fessi
Ralph Kühne (funded directly by Nokia Siemens Networks)

Student employees:

Andreas Korsten
Vladimir Maldybaev
Mark Schmidt
Matthias Stegmaier



Nokia Siemens Networks GmbH & Co KG
Herr Cornel Pampu
Dr. Morten Schläger

funding and project-management:

Bundesministerium für Bildung und Forschung (BMBF), Bonn.

Project Management Agency in the DLR/Information Technology
German Aerospace Center (DLR)


Technical University of Berlin, DAI-Laboratory of Prof. Sahin Albayrak.

University of Bremen, Group of Prof. Carmelita Görg.

Project duration:

01.09.2005 –30.08.2008


ScaleNet aspires to develop a comprehensive, cost-effective, flexible and efficient system concept, which aims at an IP optimized integration of heterogeneous wireless and wire line networks and their access technologies in order to provide attractive multimedia broadband services. Sustainable user benefit is achieved by an easy and unified usage of services ("click and wow" effect) with unlimited mobility and eventually by lower costs.
ScaleNet offers these cost savings both to network operators during deployment and operation of the network and to service providers by allowing for an easy introduction of new services. Particularly, and in accordance with 3GPP System Architecture Evolution, the protection of operator and vendor investment shall be an important aspect for the devised architecture and solutions in ScaleNet. Within ScaleNet the University of Tübingen will work in three important areas namely Accounting, Charging, and Security.

Accounting and charging:

The future B3G network shall be developed right from the start to support charging of services, including IP packet transportation and application services. To achieve these goals, we propose a generic accounting infrastructure (Figure 1) to collect data from the bearers, core network, and service providers. The accounting data will be processed by a generic AAA and charging solution, which is flexible to support many different charging schemes.

Figure 1: Generic, configurable accounting with plug-in support