Downlink Resource Allocation for a Network using Femto-Base Stations as Relays to Macro-Users

Abstract

We propose a resource allocation scheme for the downlink of a two-tier wireless network in which femto-base stations are used as relays to macro-users. In the proposed scheme, subcarriers and relays are assigned and power is allocated to macro- and femto-users such that their total net utility is maximized. Simulation results show that the proposed scheme has higher fairness index and lower total power consumption than the greedy and the random subcarrier assignment schemes.