A FUZZY-BASED VERTICAL HANDOFF SCHEME FOR INTERWORKING BETWEEN WLAN AND GSM

The next generation wireless network environments are expected to support anywhere, anytime connectivity for high-performance applications like multimedia, full-motion video and high data rates with appropriate quality of service (QoS). To provide a solution to these demanding needs, service providers intend to combine different technologies in heterogeneous networks. In this study, we propose a fuzzy-based vertical handoff scheme for interworking between WLAN and GSM. We concentrated on crucial features like user preference, network conditions, speed, RSS and support of different service types. After extensive simulation, the results show that the proposed handoff scheme maintains a stable utilization against mobility under a specific load. Moreover, the proposed scheme provides good results for the call blocking and dropping probabilities, Grade of Service (GoS), and throughput.