Measures for a handover in a communication system, the communication system comprising an access network having at least two base station entities and a core network having at least two control plane entities and at least one user plane entity, comprising the steps of initiating, upon completion of a radio network handover between a source base station entity and a target base station entity, a core network handover by the target base station entity, and performing the core network handover between a source control plane entity and a target control plane entity, wherein the user plane entity is maintained the same or changed.