Mobile Communications Division, Samsung Electronics Co., Ltd., 416 Maetan-dong, Youngtong-gu, Suwon, Gyeonggi-do 443-742, Republic of Korea
Goreti Marreiros
Knowledge Engineering & Decision Support Research Group (GECAD), Institute of Engineering-Polytechnic of Porto (ISEP/IPP), Rua Dr. Antonio Bernardino de Almeida 431, 4200-072 Porto, Portugal
Hoon Ko
Knowledge Engineering & Decision Support Research Group (GECAD), Institute of Engineering-Polytechnic of Porto (ISEP/IPP), Rua Dr. Antonio Bernardino de Almeida 431, 4200-072 Porto, Portugal
Jae-Ho Choi
Department of Computer Science, College of Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul 120-749, Republic of Korea
