1. School of Computer Science, Guangdong University of Technology, Guangzhou 510006, China, and also with the Peng Cheng Laboratory, Shenzhen 518066, China.
2. School of Computer Science, Guangdong University of Technology, Guangzhou 510006, China.
3. College of Science, Shantou University, Shantou 515063, China.
4. Huawei Noah's Ark Laboratory, Huawei, Shenzhen 518116, China.
5. Huawei Carrier Network Business Group, Huawei, Shenzhen 518116, China.