With the increasing demand for data traffic and with the massive foreseen\ndeployment of the Internet of Things (IoT), higher data rates and capacity are\nrequired in mobile networks. While Heterogeneous Networks (HetNets) are\nunder study toward 5G technology, Wireless Fidelity (WiFi) Access Points\n(APs) are considered a potential layer within those multiple Radio Access\nTechnologies (RATs). For this purpose, we have proposed in this paper a\nnovel WiFi dimensioning method, to offload data traffic from Long Term\nEvolution (LTE) to WiFi, by transferring the LTE energy consuming heavy\nusers, to the WiFi network. First, we have calculated the remaining available\ncapacity of the WiFi network based on the estimated load of each WiFi physical\nchannel using the overlapping characteristic of the channels. Then, we\nwere able through this dimensioning method, to calculate the minimum\nneeded number of WiFi APs that ensure the same or better throughput for\nthe LTE transferred users. By this method, we have ensured additional capacity\nin the LTE network with minimum investment cost in the WiFi network.\nFinally, we have estimated the profit sharing between LTE and WiFi by considering\ndata bundles subscription revenues and the infrastructure capital and\noperational costs. We have calculated for each network the profit share using\na coalition game theory Shapley value that pinpoints the benefit of the cooperation\nusing the proposed dimensioning method.
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