1. Wireless Research Institute,ZTE Corporation,Beijing,China,100029
2. ZTE Corporation,Technology Planning Department,Beijing,China,100029
3. Beihang University,School of Electronic and Information Engineering,Beijing,China,100191
4. Beijing Jiaotong University,State Key Laboratory of Advanced Rail Autonomous Operation,Beijing,China,100044
5. Shanghai Jiao Tong University,Cooperative Medianet Innovation Center (CMIC),Shanghai,China,200240