1. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Wireless and Photonics Networks Research Centre of Excellence (WiPNET), Universiti Putra Malaysia, Seri Kembangan, Selangor, Malaysia
2. School of Civil Engineering, University College Dublin (UCD), Belfield, Ireland
3. Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Seri Kembangan, Selangor, Malaysia