Fuzzy Adaptive Guard Channel Assignment Strategy for Handoff in PCS System - Fuzzy Systems, 1997., Proceedings of the Sixth IEEE International Conference on

The known channel allocation schemes in Personal Communications Service (PCS) operating with fixed guard channels for handoff calls can lead to fail in utilizing the limited channels such a wasting or lacking the number of guard channels, since the handof traflcs which depend on mobility of users are always not stationary. In this paper, we use F u z y Logic Controller (FLC) to generate proper guard channels according to fluctuating handoff traffic pattern so as not to waste or not to lack the valuable resources. Also we introduce the F u q Adaptive Guard Channel with Handoff Queueing Scheme (FA-GCHQS) which combines FLC with previous guard channel plus queueing priority scheme (GCHQq. For the performance evaluation we regard originating call blocking probability, handoff forced termination probability, and GoS of network as the system performance criteria. Finally we show that the proposed method yields better performance than that of previous one through the analytical results of W W C / K queueing model on a assumed handoff traflc pattern of a city environment.