1. Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding, Beijing, China
2. Department of Informatics, University of Oslo, Oslo, Norway
3. Chuzhou Power Supply Company of Smart Grid Anhui Electric Power Company Ltd., Chuzhou, China
4. Instituto de Telecomunicações, Campus Universitário de Santiago, University of Aveiro, Aveiro, Portugal