A resource allocation scheme for throughput maximization in OFDMA femtocell networks

Abstract

Efficient power and subchannel allocation methods are required for orthogonal frequency division multiple access (OFDMA) based femtocell networks to get high throughput for the system. This paper considered a joint subchannel and power allocation algorithm with throughput maximization for downlink of an OFDMA based femtocell networks. In the proposed algorithm, optimal power allocation was done by adopting arithmetic geometric mean(AGM) approximation based on successive convex approximation (SCA). Subchannel allocation can be done using the derived success probability of the channels for macrocell base station(MBS) and femtocell base station(FBS). The technique for subchannel allocation uses optimum value of power to calculate success probabilities of the channels. In this paper throughput maximization problem is considered with subject to constraints such as quality of service(QoS), data rate, optimum power. Our results indicate that with the femtocell incorporated network, the above methods for subchannel allocations and power optimization maximizes the throughput.