1. Centre for Wireless Communications, University of Oulu,Finland,FI-90014
2. Collese of Engineering and Computer Science, VinUniversity,Hanoi,Vietnam
3. University of Danang,Faculty of Electronics and Telecommunication Engineering,Vietnam
4. School of Electronics, Electrical Engineering and Computer Science, Queen's University,Belfast,UK
5. Center for Pervasive Communications & Computing, University of California,Irvine,CA,USA