1. Department of Computer Science and Engineering, Xi’an University of Technology, Xi’an, China
2. China Telecom Research Institute, Beijing, China
3. School of Computing and Communications, Lancaster University, Lancaster, U.K.
4. School of Cyber Science and Engineering, Wuhan University, Wuhan, China
5. Centre for Autonomous and Cyber-Physical Systems, SATM, Cranfield University, Cranfield, U.K.