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In this paper, we present the performance of a (UMTS harr GSM) inter-system handover algorithm which uses two pairs of UMTS and GSM HO thresholds (Ec/Io threshold for UMTS and RSSI threshold for GSM); one pair of thresholds for making a decision to handover from UMTS to GSM and another pair of thresholds for making a decision to handover from GSM to UMTS. We have designed and implemented the algorithm...
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