1. State Key Laboratory of Advanced Rail Autonomous Operation, the School of Electronics and Information Engineering, and the Frontiers Science Center for Smart High-speed Railway System, Beijing Jiaotong University, Beijing, China
2. School of Computer and Information Technology, Beijing Jiaotong University, Beijing, China
3. Institute of Computing Technology, China Academy of Railway Sciences Corporation Limited, Beijing, China
4. Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, China