Utility Fair User Association in LTE-WiFi Networks

WiFi has become the connection of choice (when available) for many users. For that reason, many operators have embraced WiFi as another radio access technology that eventually will be integrated to the network. In this talk we study concurrent user associations on the uplink of the OFDMA and CSMA  heterogeneous networks. Where user equipments assumed to have multi-homing capabilities. We (i) formulate the problem as a proportional fair resource allocation problem, (ii) we show that although the problem is initially non-convex it can be solved by solving a sequence of convex optimisation methods, (iii) we adapt a low-complexity distributed optimisation method to solve each convex optimisation problem.