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In this article, we examine the Location Management costs in mobilecommunication networks utilizing the timer-based method. From the study of theprobabilities that a mobile terminal changes a number of Location Areas betweentwo calls, we identify a threshold value of 0.7 for the Call-to-Mobility Ratio(CMR) below which the application of the timer-based method is mostappropriate. We characterize the valley appearing in the evolution of the costswith the timeout period, showing that the time interval required to reach 90%of the stabilized costs grows with the mobility index, the paging cost perLocation Area and the movement dimension, in opposition to the behaviorpresented by the time interval that achieves the minimum of the costs. Theresults obtained for CMRs below the suggested 0.7 threshold show that thevalley appearing in the costs tends to disappear for CMRs within [0.001, 0.7]in onedimensional movements and within [0.2, 0.7] in two-dimensional ones, andwhen the normalized paging cost per Location Area is below 0.3.

Variability of location management costs with different mobilities and timer periods to update locations