Patent ID: 7623876

Claim:
In a radio communication system having a network part and at least a first mobile station with which a communication session is effectuable by way of the network part, the network part defined in terms of logical layers including a lower logical layer and at least a higher logical layer positioned thereabove, an improvement of apparatus for facilitating paging of the mobile station, said apparatus comprising: a tracking agent embodied at the higher logical layer, said tracking agent for tracking positioning of the mobile station, the mobile station moveable within a hierarchical paging area including lower-logical-layer paging areas associated with said lower logical layer and higher-logical-layer paging areas associated with said higher logical layer, said tracking agent further for tracking in which of the lower and higher-logical-layer paging areas that the mobile station is positioned and for caching indications of the positioning of the mobile station, the indications cached by said tracking agent retrievable to perform paging of the mobile station, the paging at least initially performed in areas associated with the positioning of the mobile station.