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In order to improve the performance of wireless networks, it is necessary to consider the issue of vertical handoff between heterogeneous networks. One important aspect of this issue is the calculation of the cost function. The cost function is used to determine the optimal network for handoff based on factors such as signal strength, bandwidth, and delay. To calculate the cost function, it is important to consider the specific requirements of each network and the impact of these requirements on the overall performance of the system. Additionally, it may be useful to explore different algorithms for cost function calculation, such as those based on machine learning or artificial intelligence. By taking these factors into account, we can develop more effective strategies for vertical handoff and improve the overall performance of wireless networks.