The use of multiple interfaces to access heterogeneous networks is becoming a strong reality to end-users. Hence one realistic problem is how to select a specific access interface (and consequently network) as well as how to perform smooth and seamless handover among different types of technologies. In this paper we propose a dynamic and user-centric network selection and decision process which optimizes handover across heterogeneous networks. A satisfaction degree function (SDF) is used to evaluate, according to user's predefined criteria, available networks and select the best one(s) according to such criteria. The criteria consider incorporating user policies and information from several OSI layers, including dynamic network status and application requirements. Numerical results show that the proposed network selection process results in the choice of the best network according to the user's choices.
['Xuejun Cai', 'Ling Chen', 'Rute C. Sofia', 'Yanqi Wu']
Dynamic and User-Centric Network Selection in Heterogeneous Networks