Resource Allocation in Hybrid Access OFDMA Femtocell Networks

Femtocells are a promising solution to enhance indoor coverage and system capacity. Hybrid access methods reach a compromise between the performance of subscribers and non-subscribers. In this paper, a Weighted Proportional Fair (WPF) algorithm is proposed, in which different users with different weights, for the downlink hybrid access OFDMA femtocell networks. Besides, two algorithms are developed to obtain the user scheduling weight. The one is that adaptively change the scheduling weight, the other is based on the asymptotic analysis of WPF algorithm. Simulation results show that the two scheduling algorithms in the hybrid access femtocells could reasonably allocate the resource between the subscribers and non-subscribers and ensure the rate requirements of different users.