An apparatus comprising at least one processor, at least one interface (12, 13) to at least one other network element, and at least one memory for storing instructions to be executed by the processor, wherein the at least one memory and the instructions are configured to, with the at least one processor, cause the apparatus at least to perform: a candidate list creation function configured to create a list of candidate communication cells (20, 25, 26) usable as target cells for an autonomous mobility procedure conducted by a communication element, a list sending function configured to cause sending (S1, S110) the list to a communication element, and a preparation information function configured to cause transmitting (S2A, S2B, S120), when the list is sent to the communication element, preparation information to the candidate communication cells (20, 25, 26) contained in the list sent to the communication element, the preparation information comprising information for preparing the candidate communication cells (20, 25, 26) for a potential autonomous mobility procedure conducted by the communication element, characterized in that the preparation information function is further configured to include in the preparation information an information element indicating an identification of the communication element to which the list is sent, and at least one of an information element indicating a source for obtaining configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed, and configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed. a candidate list creation function configured to create a list of candidate communication cells (20, 25, 26) usable as target cells for an autonomous mobility procedure conducted by a communication element, a list sending function configured to cause sending (S1, S110) the list to a communication element, and a preparation information function configured to cause transmitting (S2A, S2B, S120), when the list is sent to the communication element, preparation information to the candidate communication cells (20, 25, 26) contained in the list sent to the communication element, the preparation information comprising information for preparing the candidate communication cells (20, 25, 26) for a potential autonomous mobility procedure conducted by the communication element, characterized in that the preparation information function is further configured to include in the preparation information an information element indicating an identification of the communication element to which the list is sent, and at least one of an information element indicating a source for obtaining configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed, and configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed. an information element indicating a source for obtaining configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed, and configuration data comprising communication element context data necessary for providing immediate service to the communication element when the autonomous mobility procedure is executed.