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In the development of the wireless communication of the future, heterogeneous wireless network integration is a developing trend. Such an environment poses a significant challenge: how can we choose an appropriate Network Access Point (NAP) to achieve load balance and offer high quality communication in heterogeneous wireless handover decisions? We apply fuzzy logic in heterogeneous wireless network handover decisions and introduce the fuzzy normalization concept to make parameters for heterogeneous wireless network normalization. Using a simulation, we determine under what conditions our handover decision algorithm can balance network system loading better than the traditional fuzzy algorithms applied in heterogeneous wireless network handover decisions.