1. University of Cyprus, P.O. Box 20537, 75 Kallipoleos Str., 1678 Nicosia CYPRUS
2. CEA LIST, Communicating Systems Laboratory, Point Courrier 94, Gif-sur-Yvette, F-91191 France
3. University of Aveiro, Institute of Telecommunications, Campus de Santiago, 3810-193, Portugal
4. PT Inovação, Rua Engenheiro José Ferreira Pinto Basto, 3830 Aveiro, Portugal
5. Fraunhofer FOKUS, Kaiserin-Augusta-Allee, 31, 10589 Berlin, Germany