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One of the major design issues for providing seamless mobility is the support of vertical handoff. Vertical handoff occurs when a mobile terminal switches from one network to another. Different networks have different characteristics, which makes it very difficult to keep up Quality of Service (QoS). The number of mobile users and their bandwidth demands has experienced significant growth. This paper proposes a Vertical Handover Decision (VHD) algorithm using FuzzyLinear Programming (FLP) approach, in Heterogeneous Wireless Networks (HWN), to integrate WiFi (Wireless Fidelity), WiMax (Worldwide Interoperability for Microwave Access) and LTE (Long Term Evolution) for connecting to the optimal network. Initially the traffic classes are identified using heuristic decision and then the handoff decision will be carried out based on Fuzzy decision matrix which will lead to handover based on the objective function. The simulation results show that our proposed scheme performs better in many evaluating patterns and the delay gets minimized when compared to SAW (Simple Additive Weighting), MEW(Multiplicative Exponential Weighted) and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution).

Quality of Service aware Vertical Handoff Decision Algorithm between WiFi WiMax and LTE