Intelligent Vertical Handoffs between Heterogeneous Communication Networks

摘要

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.