Method and device for radio cell change due to energy saving in a mobile communication network

In order to avoid peak signaling loads, which may occur when mobile communication devices register in a new radio cell due to a deactivation of their former radio cell, the invention suggests a method for a mobile communication device changing from a first to a second radio cell in a mobile communication network. The method comprises the steps of: (i) The mobile communication device randomly determining a time interval, (ii) the mobile communication device determining an expiration of the time interval starting from a predetermined point in time, and (iii) the mobile communication device registering in the second radio cell, when the expiration of the time interval has been determined. Furthermore, the invention is related to a mobile communication device for executing the method.