Affiliation: | (1) Offene Kommunikationssysteme, Fachbereich Informatik, Technical University of Berlin, Franklingstr. 28/29, 10587 Berlin, Germany;(2) Siemens, Public Communication Network Division, Siemensdamm 62, 13623 Berlin, Germany;(3) National Research Center for Computer Science, GMD-Fokus, Hardenbergplatz 2, 10623 Berlin, Germany |