Multiple Attribute Scheme to Enhance Handoff Efficiency in Heterogeneous Wireless Networks

ABSTRACT Wireless technologies, under the “Anywhere Anytime” Paradigm offer users the promise of being always attached to the network. Thus seamless handover between networks in heterogeneous networks is essential. Mobile devices enabled with multiple wireless technologies make possible to maintain seamless connectivity in highly dynamic scenarios when switching from one wireless network to another by using vertical hand off techniques (VHO). The key requirement is to select the best next network which satisfies end-to-end QoS for mobile users. Although various vertical handoff decision techniques have been considered in the literature review recently, there is a lack of performance comparison with the existing handoff decision scheme. This can be done with the proposed solution which consists of a multiple attribute decision scheme implemented with a fuzzy logic model. Selection of the best next network is performed by this fuzzy controller taking suitable number of attributes. Using this fuzzy solution the handoff efficiency can be improved which considers both application characteristics and network parameters.