Corresponding Author: Zhiyuan Ren, the corresponding author, email: zyren@xidian.edu.cn, received his M.S. and PhD. degrees from Xidian University, China in 2007 and 2011, respectively, in Communication and Information System. He is currently an associate professor in the School of Telecommunication Engineering, Xidian University, Xian 710071,China. His research interests include distributed computing, Mobile Edge Computing and Network Virtualization in 5G.