Intelligent Vertical Handoffs between Heterogeneous Communication Networks
Zhang, Qi Qi, Wang, Yi-hong, Christina Rita Victor, Ying Ying, Ping Ping · 中国邮电高校学报：英文版 · 2005
This paper proposes an intelligent vertical handoff algorithm to maintain an ongoing call between a cellular mobile network and a Wireless Local Area Network (WLAN), based on the Received Signal Strength (RSS) threshold and an adaptive RSS hysteresis generated by fuzzy logic. In addition, the proposed algorithm accounts for the WLAN traffic loading and the direction of movement and speed of the Mobile Station (MS). Simulation results indicate that the proposed algorithm offers better system performance in terms of number of handoffs and probability of call dropping.