1. Department of Quantitative Methods and Economic Informatics Faculty of Operation and Economics of Transport and Communications , University of Zilina Univerzitna 8215/1 , Zilina , Slovakia
2. Department of Electronics and Communication Engineering University of Engineering & Management , University Area Action Area III , New Town, West Bengal – 700160
3. Transport and Telecommunication Institute Lomonosova 1 , Riga , , Latvia
4. Narula Institute of Technology 81 , Nilgunj Road, Agarpara, Kolkata, West Bengal - 700109 . India