The invention relates to a handover method, mobile system and apparatus deciding on the handover of the mobile system triggering an accelerated handover algorithm when the signal level and/or quality between the mobile station and a serving base transceiver station quickly drops. The method measures the level and/or quality of the signal between the base transceiver station and the mobile station, sets a predefined signal change as the trigger value, calculates the change in the signal level and/or quality, and if the change is at least equal to the trigger value, executes the first handover algorithm.