On adopting Interleave Division Multiple Access in two-tier femtocell networks: The uplink case

A femtocell base station (FBS) is designed to cater for the demand of ever-increasing wireless data traffic, typically in the indoor environment. Among the many technical problems, interference management is particularly a challenging one for fully harvesting the high potential of femtocell networks. In this paper, we address the interference management problem with an iterative multi-user detection approach, and propose to adopt Interleave Division Multiple Access (IDMA) for the uplink of two-tier femtocell networks by exploiting the processing capability of FBS. We consider three IDMA-based schemes, namely, FBS Decode, FBS Forward, and FBS Select, and evaluate their performance with simulations. Numerical results show that the proposed schemes achieve considerable throughput gain over traditional techniques and are highly suited for the uplink of two-tier femtocell networks.