中文摘要：

PU Ling iun, is currently a Ph.D. candidate at College of Computer and Control Engineering, Nankai University, China. His research focuses on mobile cloud computing, wireless networking and opportunistic routing. Email： pulingjun@maiknankai.edu.cn XU Jingdong, is currently a Professor in College of Computer and Control Engineering of Nankai University and leading the Computer Networks （NET） Research Group. Her ma vehicle ad-hoc network n research interest is sensor, network security and management, and opportunistic network and computing Emaik xujd@nankakedu.cn YU Bawen, is a Ph.D. Student in College of Computer and Control Engineering of Nankai University, China. His current research is in traffic classification and network security. Email： yubowen@mail.nankai.edu.cn ZHANG Jionzhong, is a Professor in College of Computer and Control Engineering of Nankai University, China. He is interested in computer networks, network security and mobile computing. Email： zhangjz@ nankai.edu.cn