1. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China
2. James Watt School of Engineering, University of Glasgow, Glasgow, U.K
3. Department of the Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, USA
4. School of Computer Science and Engineering, The University of New South Wales, Sydney, NSW, Australia
5. Sony (China) Ltd., Beijing, China
6. School of Computer Science and Engineering, Nanyang Technological University, Jurong West, Singapore