Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2012.1790.1793LiuBanteng ChenYourong 1220121112This study proposes a two-tiered network in which lower-power users communicate with one another through repeaters, has limited capacity and may interfere with one another if their transmitter frequencies are close and they share the same private-line tone. Motivated by cellular networks, this study gives a naive solution where the number of repeaters and their positions can be obtained analytically. This study further proposes an iterative refinement algorithm consisting of three fundamental modules that draw the Voronoi diagram, determine the centers of the circumscribed circles of the Voronoi regions and escape the local optimum by using external optimization.]]>Baek, S.J. and G. de Veciana,2005Srinivasan, V., C.F. Chiasserini, P.S. Nuggehalli and R.R. Rao,2004Yin, S. and X. Lin,2005Busse, M., T. Haenselmann and W. Effelsberg,2006Foulds, L.R.,1984Wu, X., M. Zhou, L. Meng, J. Hua, K. Zhou and T. Wu,2010Zhou, K., L. Meng, Z. Xu, G. Li and J. Hua,2008Jun, D. and L. Wei-Hua,2010Nurul Huda, M., F. Yasmeen, E. Kamioka and S. Yamada,2007Sharma, S., R.C. Jain and S. Bhadauria,2006Sharma, S., R.C. Jain and S.S. Bhadauria,2006Sharma, S., R.C. Jain and S.S. Bhadauria,2007Al-Sharabi, N.A.N., L.R. Fa and M.H. Algamali,2008Mahmood, K., I. Hameed, K. Rashid and A. Qayyum,2003