1. School of Computer Science Zhongyuan University of Technology Zhengzhou China
2. Henan High‐Speed Railway Operation and Maintenance Engineering Research Center Zhengzhou China
3. The State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China
4. Beijing Engineering Research Center of High‐speed Railway Broadband Mobile Communications Beijing China
5. Telecommunication Engineering Program School of Electrical Engineering, and Informatics Institut Teknologi Bandung Bandung Indonesia
6. Key Laboratory of all Optical Network and Advanced Telecommunication Network of MOE Beijing Jiaotong University Beijing China
7. Key Lab of All Optical Network and Advanced Telecommunication Network of EMC, Institute of Lightwave Technology Beijing Jiaotong University Beijing China