School of Information Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China;
State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an, 710071, China;
State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an, 710071, China;
National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China;
State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an, 710071, China;
School of Information Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China;
Service Development Center, State Commission Office for Public Sector Reform, Beijing, 100028, China;
National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China;
System Simulation Department, ZTE Corporation, Xi'an, 710114, China;