1. Posts and Telecommunications Institute of Technology,Ho Chi Minh City,Vietnam
2. Ho Chi Minh City University of Technology and Education,Ho Chi Minh City,Vietnam
3. Ho Chi Minh City University of Technology (HCMUT),Ho Chi Minh City,Vietnam
4. University of Education, Hue University,Hue City,Vietnam
5. Telecommunications University,Nha Trang City,Vietnam