| 摘要 |
<p>Responsive to receipt at an originating switching node (12(1)) of an incoming call (100), a location request (send routing) message is sent to the home location register for the called mobile station. A routing request (provide roaming) message (104) is then sent from the home location register to the switching node (12(1)) identified by the home location register as currently serving the called mobile station (14(1)). If the mobile station is not authorized to receive service in the areas serviced by the serving switching node a subscribed not found message (214) is returned to the originating switching node. Otherwise, the serving switching node pages (108) for the called mobile station only in those areas it services which are also authorized to provided called mobile station service. Responsive to a paging acknowledgement (110), an appropriate routing number is assigned (112) and transmitted (114) back to the originating switching node. The assigned routing number is then used to establish a trunk connection (116) between the originating switching node and the base station controller for purposes of effectuating call delivery (118).</p> |
