1. Faculty of Information Technology, Polytechnic University of Tirana, Mother Teresa Square, No. 4, Tirana, Albania. E-mail: kevin.bylykbashi@fti.edu.al
2. Department of Electronics and Telecommunication, Faculty of Information Technology, Polytechnic University of Tirana, Mother Teresa Square, No. 4, Tirana, Albania. E-mail: evjolaspaho@hotmail.com
3. Department of Information and Communication Engineering, Fukuoka Institute of Technology (FIT), 3-30-1 Wajiro-Higashi, Higashi-Ku, Fukuoka 811-0295, Japan. E-mail: barolli@fit.ac.jp
4. Department of Languages and Informatics Systems, Technical University of Catalonia, C/Jordi Girona 1-3, 08034 Barcelona, Spain. E-mail: fatos@lsi.upc.edu