Patent ID: 7346031

Claim:
A cellular telecommunications system comprising: a plurality of base station control means (BSS) serving cells in a Location Area (LA), which comprises a first plurality of cells, circuit-switch control means (MSG/VLR) for said Location Area, for establishing circuit-switched connections to mobile stations within the Location Area, a serving GPRS support node (SGSN) which provides packet control means for establishing data packet-switching with mobile stations within one or more Routing Areas (RA), each Routing Area comprising a second plurality of cells, being a subset of the first plurality of cells, and the SGSN being operative to page mobile stations within a Routing Area for initiating a circuit-switched connection to a mobile station, characterised in that the SGSN comprises a record to provide information as to which base station control means serve cells within the Location Area which are not part of a Routing Area, and in that the SGSN consults said information when paging mobile stations.