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A NOVEL HANDOVER ALGORITHM FOR LTE BASED MACRO-FEMTO HETEROGENEOUS NETWORKS

This paper presents a novel Handover mechanism to minimize target Femto Access Points (FAPs) list during macro-to-femto and femto-to-femto handover in LTE based Macro-Femto Heterogeneous Networks. HandOver is the procedure that transfers an ongoing call from one cell to another as the users move through the coverage area of cellular system. The femtocell has a limited coverage area (15 meters to 30 meters), and subsequently, HandOver is decided based on mobile User Equipment (UE) speed for handover between macrocell-to-femtocell and femtocell-to-femtocell. In the existing networks, for handover procedure, serving Base Station will decide the cell selection based on mostly the signal strength of the neighbouring femtocells. This information is provided by the Measurement Reports sent by the corresponding UE. In this paper, we present a novel handover management scheme which considers both the Received Signal Strength and Cell Load of the target Femtocells for making the Handover decision. This proposed scheme for macro-femto heterogeneous network reduces the number of target FAPs to avoid handover to overloaded femtocells and also reduce the number of handovers.