Following the continuous increase of the mobile data traffic, the 5G technology has been introduced to offer additional capacity and higher data rate. WiFi APs integration with mobile networks are considered as potential candidate towards the heterogenous networks. We first propose in this thesis an algorithm for the estimation of the WiFi physical channels load through the observation of the non-overlapped channels and estimating as a result the load of the entire physical channels. Then, in our second proposed algorithm, we propose to dimension the WiFi network to offload LTE network and transfer the users that consume the high level of transmission power. The algorithm calculates the minimum needed number of APs that will support the ext...