Date Added: Jun 2011
This paper considers a two-tier cellular network wherein femtocell users, who communicate with their homeowner-deployed base stations, share the same frequency band with macrocell users by Code-Division Multiple Access (CDMA) technology. Since macrocell users have strictly higher priority in accessing the available radio spectrum, their Quality-of-Service (QoS) performance, expressed in terms of the minimum required Signal-to-Interference-plus-Noise Ratio (SINR), should be maintained at all times. Femtocell users, on the other hand, are allowed to exploit residual network capacity for their own communications. In this paper, the authors develop a joint power- and admission-control algorithm for interference management in such two-tier networks.