Multi-radio access technology paging

A system for providing paging in a cellular telecommunications network, comprising:

• a first multi-radio access technology (multi-RAT) base station;
• a second multi-RAT base station in communication with the first multi-RAT base station;
• and
• a coordinating gateway in communication with the first and second multi-RAT base stations and situated between the first and second multi-RAT base stations and a core network,
• the coordinating gateway further comprising:
• a combined user device location database, and
• a processing module configured to perform steps including:
• providing a combined user device location database in a heterogeneous radio access network at the coordinating gateway between the first and second multi-RAT base stations and a plurality of core network nodes;
• at the coordinating gateway, storing a first location of a user device based on receiving a first user device registration request at the first multi-RAT base station using a first radio access technology;
• at the coordinating gateway, storing a second location of the user device based on receiving a second user device registration request at the second multi-RAT base station using a second radio access technology, the second radio access technology being a different radio access technology than the first radio access technology;
• querying the combined user device location database for a last known location of the user device across both the first and the second multi-RAT base stations,
• thereby maintaining a combined user device location database across multiple radio access technologies in a heterogeneous radio access network;
• and
• receiving, by the coordinating gateway, an incoming paging request for a first radio access technology, and based on the queried last known location, preferentially sending a paging request to a multi-radio access technology base station.