There is provided a method of triggering a handover of a mobile station in a discontinuous coverage radio network, wherein the method comprises the steps: transferring at a point in time a data volume via a first transfer zone of the discontinuous coverage radio network to a cache storage of the mobile station, wherein the data volume permits the provision of a service to the mobile station for at least the duration of a period of time, wherein the first transfer zone is the serving transfer zone of the mobile station; triggering the handover of the mobile station from the first transfer zone to a second transfer zone of the discontinuous coverage radio network only after the period of time has been spent with respect to the point in time, wherein the mobile station has been moved in the mean time from the first transfer zone to the second transfer zone.