1. Department of Computer and Information Science, State Key Laboratory of Internet of Things for Smart City, University of Macau, Macau, China
2. Department of Computer and Information Science, State Key Laboratory of Internet of Things for Smart City, University of Macau, Taipa, Macau, China
3. College of Information Engineering, Zhejiang University of Technology, Hangzhou, China
4. Department of Communication Engineering, Dalian Maritime University, Dalian, China
5. School of Cyber Science and Engineering, Xi’an Jiaotong University, Xi’an, China
6. Faculty of Computer Science, University of New Brunswick, Fredericton, Canada