METHOD OF WCDMA COVERAGE BASED HANDOVER TRIGGERING

摘要

A method of triggering IF or IS handover between two WCDMA carriers or a WCDMA carrier and a GSM carrier. Six triggering conditions are used to initiate the search for an alternative network connection by starting the handover measurements. They are: a) mobile unit (15, figure 9) power above a threshold for longer than a specified time; b) connection base (70) power downlink power above a threshold longer than a specified time; c) mobile unit (15) power has reached a max value a specified number of times; d) SIR at the base (70) has exceeded a threshold value for a period of time; e) mobile terminal (15) power has exceeded a threshold and the gradient of the power control signature indicates sudden rise to maximum power; and f) pilot power measured at the mobile (15) has fallen below a threshold for longer than a specified time.