1. Graduate School of Engineering, Fukuoka Institute of Technology, Fukuoka, Japan. E-mails: ryuui1010@gmail.com, kosuke.o.fit@gmail.com
2. Department of Information and Communication Engineering, Fukuoka Institute of Technology, Fukuoka, Japan. E-mails: kt-matsuo@fit.ac.jp, makoto.ikd@acm.org, barolli@fit.ac.jp