作者机构:[1]State Key Laboratory of Networking and Switching Technologies, Beijing University of Posts and Telecommunications, Beijing 100876, China
相关基金:Supported by the National Key Basic Research and Development (973) Program of China (No. 2007CB310605), the National Natural Science Foundation of China (Nos. 60802035 and 60902050), and Funds for Creative Research Groups of China (No. 60821001)