1. Department of Computing São Paulo State University Av. Eng. Luiz Edmundo Carrijo Coube Bauru Brazil
2. TECNALIA, Basque Research and Technology Alliance (BRTA) Derio Spain
3. Department of Communications Engineering University of the Basque Country (UPV/EHU) Bilbao Spain
4. School of Computer Systems Engineering Universidad Politécnica de Madrid Madrid Spain