1. Department of Software Convergence, Soonchunhyang University, Asan 31538, Republic of Korea
2. Department of Information and Communications Technology, American University of Phnom Penh, Phnom Penh 12106, Cambodia
3. Cambodian Ministry of Post and Telecommunications, Phnom Penh 12200, Cambodia
4. Department of Computer Software Engineering, Soonchunhyang University, Asan 31538, Republic of Korea