1Division of Knowledge and System Engineering for ICT, Faculty of Information Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam
2Department of Networked Systems and Services, Budapest University of Technology and Economics, Budapest, Hungary
3RGM College of Engineering and Technology (RGMCET), Nandyal, Kurnool District, India
4Department of Mathematics, Beijing Jiaotong University, Beijing, China
5Department of Informatics Systems and Networks, Faculty of Informatics, University of Debrecen, Debrecen, Hungary