1. School of Computer Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
2. Department of the Communication Research Center, Harbin Institute of Technology, China
3. Discipline Head of Computer Science in the School of Information and Communication Technology, Griffith University, Australia
4. State Key Laboratory of Integrated Service Networks, Xidian University, Xidian University, Xian, China
5. Shenyang Aerospace University, Shenyang, China