1. The Internet of Things and Artificial Intelligence College Fujian Polytechnic of Information Technology Fuzhou 350003 China
2. College of Computer Science and Technology China University of Petroleum (East China) Qingdao 266580 China
3. School of Information Technology and Engineering Vellore Institute of Technology Vellore 632014 India
4. Department of Network Engineering Technical University of Catalonia (UPC) Barcelona 08034 Spain