1. College of Computer Science and Electronic Engineering, Hunan University, Changsha, China
2. Department of Digital Industry Technologies, National and Kapodistrian University of Athens, Athens, Greece
3. School of Information Science and Electrical Engineering, Shandong Jiaotong University, Jinan, China
4. Department of Electrical Engineering, Qatar University, Doha, Qatar
5. Department of Informatics and Telecommunications, University of Thessaly, Lamia, Greece
6. University of New South Wales, Sydney, NSW, Australia