Backhaul Constraint-Based Cooperative Interference Management for In-Building Dense Femtocell Networks

Dense femtocell networks have emerged as a key technology in residential, office building or hotspot deployments that can significantly improve the coverage and capacity of next-generation wireless networks. But, in the co-channel deployment scenarios, dense inter-femto interference might significantly deteriorate the overall system performance. In this paper, a new cooperative strategy in the dense femtocell networks with backhaul capacity constraints is proposed where multiple dominant interference from dense femtocells is classified into a number of groups, and different cooperative algorithms for these groups are used to mitigate the mutual interference and then obtain better trade-off between performance gains and needed cost. Simulation results show the proposed scheme yields great gains in terms of the average cell throughput, reaching up to 30% relative to the classical of non-cooperative transmissions.