Microcellular Handoff Algorithms

Microcells increase system capacity but make resource management difficult. They impose distinct constraints on handoff algorithms due to the characteristics of the propagation environment. Adaptive handoff algorithms for microcells are proposed. The proposed non-direction-biased algorithm utilizes adaptive parameters supplied by a fuzzy logic system. Directionbiasing has been incorporated into the basic non-direction-biased algorithm to obtain a good basic adaptive algorithm suitable for a microcellular environment. Adaptation to traffic, interference, and mobility has been superimposed on the basic direction-biased algorithm. It is shown that the proposed algorithms provide high performance in generic handoff scenarios in a microcellular system.