1. LaTARC Research Laboratory, Federal Institute of Education, Science, and Technology of Rio Grande do Norte (IFRN), Natal, Brazil
2. Instituto de Telecomunicações, Universidade de Aveiro, Aveiro, Portugal
3. Leading Advanced Technologies Center of Excellence (LANCE), Federal University of Rio Grande do Norte (UFRN), Natal, Brazil
4. Department of Computer Science, Saint Louis University, St. Louis, MO, USA