Distributed Topology-Based Resource Allocation for a Femtocell-Based Cellular Network

Femtocell (FC) is a low-power, low cost indoor cellular base station (BS) installed by an end user at home or in an office environment. A typical indoor coverage of an FC is tens of meters and could cover several rooms. When Femto base stations (F-BS) are densely deployed, interference between them becomes an unavoidable issue. Hence, there is an immediate need for a robust interference management technique before femtocells can be extensively adopted for commercial purpose. In this paper, we propose a distributed algorithm that takes into account dynamic topology of FCs and carefully allocates communication channels to each F-BS. This also addresses the co-domain interference problem in FCs. We perform extensive simulations to demonstrate the novelty of our proposed scheme, called as distributed topology-based spectrum allocation. This avoids spectrum overlap that facilitates efficient resource allocation for each cell, thereby enabling low interference under high resource utilization and increased reuse efficiency.