Interference mitigation in femtocell CDMA networks through time reuse partitioning

Abstract

A two-tier network composed of conventional macroceUular networks and emerging multi-femtoceU networks offers extended indoor coverage and higher data rates while off oading the traff c through high speed backhaul network.This network can also reduce the power useage signif cantly via available short range radio communication. As the femtocell shares the same frequency band with underlying macrocell, the cross tier interference needs to be mitigated. The inter femtocell and cross tier interference near femtocell boundary may unacceptably degrade the system performance. In this paper, we propose to use time reuse portioning to mitigate downlink inter femtocell interference as well as cross tier interference and the present results to show performance improvement by employing the time reuse partitioning in CDMA networks.

Cooperative code-sharing for UMTS femtocells

“…Siddavaatam et al [11] partition macrocell coverage into concentric regions and assign femtocells time-slot allocations dependant upon the region they reside in. Power control is also used to reduce interference between femtocells within the same region.…”