Location-Dependent Power Setting for next generation femtocell base stations

In this paper, we study how the downlink received signal quality and throughput will be affected by deploying the Open Subscriber Group (OSG) Femtocell [1] using Location-Dependent Power Setting (LDPS) scheme with spectrum allocation (1, 3, 3) in the next generation mobile network. The LDPS scheme aims to use a suitable power for femtocell base station to maintains its indoor user coverage. The design of mandating indoor users to connect to femtocells ensures the transmission quality of indoor users and reduces the load of the macrocell base stations. Furthermore, by introducing transmit power upper bound (P_max) and lower bound (P_min), LDPS can better save power or trade power with throughput. Our study uses a large-scale macrocell/femtocell deployment model and considers many aspects of the next generation mobile communication systems, including OFDMA, adaptive modulation and coding, diverse propagation loss models, etc. This study sheds new insight on the self-optimization/self-configuration aspect of the next-generation femtocell deployment.