An FFR Based Technique to Improve System Capacity through Femtocell Based Network

Nowadays, Long Term Evolution (LTE) networks are becoming more and more popular. Femtocells have a strong potential for increasing the efficiency, cell coverage and network capacity of next-generation mobile networks. LTE femtocells represent a very promising answer to the ever growing bandwidth demand of mobile application. This system can be easily deployed without requiring a centralized planning to provide high data rate connectivity with a limited coverage. Femtocell is low power, very small and cost effective cellular base station used in indoor environment. But the impact of femtocell on the performance of the conventional Macrocell system leads interference problem between femtocell and pre-existing Macrocell as they share the same licensed frequency spectrum. Frequency Reuse is a technique to improve system capacity by manipulating the frequency resource allocation upon terminal’s location. In this paper, an efficient method to improve system capacity through interference management in the existing FemtoMacro two tier networks has been proposed. In this scheme, a novel frequency planning for two tier cellular network using frequency reuse technique is used where Macro base station allocate frequency sub-bands for femtocell users onrequest basis through femtocell base stations to cancel interference.