中文摘要：

WU Xiaokun, is currently a Ph.D. student at the State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China. His current research interests include service computing and mobile service. The corresponding author. Email： wuxk@bupt.edu.cn TIAN Yue, is currently working toward the B.E. degree in computer science in Beijing University of Posts and Telecommunications, China. His research interests are in the area of SOA, service computing and service composition. WU Jiyan, is currently a Ph.D. student at the State Key Laboratory of Networksing and Switching Technology, Beijing University of Posts and Telecommunications. His current research interests include multi- media service and mobile service. CHENG Bo, is a professor at the State Key Laboratory of Networksing and Switching Technology, Beijing University of Posts and Telecommunications. His current research interests include service computing and communication software. CHEN Junliang, is an academician of Chinese Academy of Sciences, and he is an academician of Chinese Academy of Engineering. Now, he is a professor of Beijing University of Posts and Telecommunications. His research interests include service computing and communication software.