1. Department of Computer Science, Applied Network Technology (ANT) Laboratory, College of Computing, Khon Kaen University, Khon Kaen, Thailand
2. Faculty of Electrical-Electronic Engineering, Duy Tan University, Da Nang, Vietnam
3. Faculty of Information Technology, Duy Tan University, Da Nang, Vietnam
4. Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, TX, USA