1. Department of Embedded Systems Engineering Incheon National University Incheon 22012 South Korea
2. Faculty of Information Technology King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand
3. Dipartimento di Informatica (DI) Università degli Studi di Milano Via Celoria 18, Milano (MI) 20133 Italy
4. Department of Computer Science Bahria University Islamabad Pakistan