1. School of Computer Science and Engineering, Southwest Minzu University,Chengdu,China,610041
2. School of Computer Science, Chengdu University of Information Technology,Chengdu,China,610225
3. Colasoft Co., Ltd,Chengdu,China,610095
4. School of Information and Communication Engineering, University of Electronic Science and Technology of China,Chengdu,China,611731
5. China Mobile Group Design Institute Co., Ltd. Sichuan Branch,Chengdu,China,610045
6. School of Electronic and Information, Southwest Minzu University,Chengdu,China,610041