1. Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province, School of Software, Dalian University of Technology, Dalian, China
2. Department of Communication Engineering, Institute of Information Science Technology, Dalian Maritime University, Dalian, China
3. State Key Laboratory of Marine Resource Utilization in South China Sea and the School of Information and Communication Engineering, Hainan University, Haikou, China
4. School of Electrical Engineering and Intelligentization, Dongguan University of Technology, and National Key Laboratory of Communications, University of Electronic Science and Technology of China, Chengdu, China