Guangdong Communications&Networks Institute;
Guangzhou;
Guangdong 510700;
China;
State Key Laboratory of Networking and Switching Technology;
Beijing University of Posts and Telecommunications;
Beijing 100876;
China;
Purple Mountain Laboratories;
Nanjing;
Jiangsu 211111;
China;
Department of Information and SoftwareServices;
Ministry of Industry and Information Technology of People’s Republic of China;
Beijing 100846;
China;