1. Mobile Multimedia Lab, Department of Informatics; Athens University of Economics and Business; Athens; Greece
2. Instituto de Telecomunicações, Faculdade de Engenharia; Universidade do Porto; Porto; Portugal
3. Blekinge Institute of Technology; Karlskrona; Sweden
4. Computer Networks and Computer Communications; University of Passau; Passau; Germany
5. Department of Computer Science, Systems, and Manufacturing; University of Rome at Tor Vergata; Rome; Italy
6. Instituto de Telecomunicações, Faculdade de Ciências; Universidade do Porto; Porto; Portugal
7. Faculty of Electronics and Information Technology, Institute of Telecommunications; Warsaw University of Technology; Warsaw; Poland
8. Fraunhofer Institute for Open Communication Systems; Berlin; Germany