Patent ID: 6615044
Filing Date: 2003-09-02
Classification: H04W

Abstract:
A method of triggering a handover event in telecommunication networks having a plurality of base stations operated by a plurality of network operators each having one or more frequency carriers, wherein the handover event is used in a frequency division multiplex (FDD) mode of a mobile terminal capable of communicating with one or more base stations of the telecommunication networks over corresponding uplink and downlink, for allowing the mobile terminal to move from the radio coverage area of a first frequency carrier to the radio coverage area of a second frequency carrier while maintaining communication with one or more base stations, wherein the handover event is performed based on signal strength and/or signal quality measurement, said method comprising the steps of:obtaining a first signal indicative of a triggering parameter; determining from the first signal whether the triggering parameter has fulfilled a triggering condition regarding a reference value; and providing a second signal when the triggering parameter has fulfilled the triggering condition for starting the signal strength and/or signal quality measurement; wherein the triggering condition is one of a set of triggering conditions each of which is sufficient for initiating handover measurements; wherein the set includes a plurality of power values and at least one signal-to-noise ratio (SIR) value; and wherein, after the providing step, the mobile station receives a neighbor list and subsequently is sent a handover command.