23. A method for paging optimization in a mobile network, comprising:sending to a core network entity from a radio access network entity serving a user equipment a list of recommended cells for paging of said user equipment, organised as a list of recommended radio access network entities to send paging messages to, and for a radio access network entity of said list of recommended radio access network entities, a list of recommended cells for paging of said user equipment by said radio access network entity of said list of recommended radio access network entities.