A method and system of controlling handover in a mobile communication network is described. According to the described technique, the selection of one of a plurality of handover alternatives is based on pre-stored probability indicators which indicate a likely probability of success if handover is effected to that handover alternative. The technique also involves the use of a monitoring period which monitors both the instant and the selected traffic channel for a period surroundding handover to provide data for subsequent use in selecting handover alternatives.