1. University of Carthage, École Supérieure des Communications de Tunis, LR11TIC03, Innovation of COMmunicant and COoperative Mobiles (Innov’COM) Laboratory, Ariana, Tunisia
2. Faculty of Engineering and Science, University of Agder, Grimstad, Norway
3. Department of Informatics and Telecommunications, National and Kapodistrian University of Athens, Athens, Greece