1. School of Computer Science and Engineering, Energy Research Institute @ NTU, Interdisciplinary Graduate Program, Nanyang Technological University, Singapore
2. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, China
3. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China
4. School of Computer Science and Engineering, Nanyang Technological University, Singapore
5. China Academy of Information and Communications Technology, Beijing, China
6. Institute for Communications Technology (IfN), Technische Universität Braunschweig, Brunswick, Germany