Adaptive Handover Scheme Enhancement in LTE Femtocells Network

Abstract

A femtocells are used within Long Term Evolution (LTE) Network to improve the network performance by reducing the blocking. In a largescale NoF, many UEs may perform cell reselections and handovers to neighboring femtocells frequently. Consequently, this must besolveed the scalability problem in terms of location signaling traffic towards the MME in the core network. In Femtocell environments, new and flexible decision parameters will influence the HO other than existing parameters, such as serving cost, user‟s status and preferences, load balancing, etc. In other words, the serving cell and/or UE should decide to handoff to a target cell based on multiple parameters. There is a need for algorithms to optimize and adapt these and other parameters. Therefore an adaptive handover algorithm is proposed. The algorithm is evaluated by MATLAB simulation. The simulation scenario, includes a group of femtocells in the same administrative domain cooperate towards a global performance improvement, which can effectively manage hotspot cells in 4G Femtocells. The proposed scheme results in increasing the resource utilization, decrease the blocking probability, the transmission dealy time reduced, the package delay reduced and the throughput increased