METHOD OF STORING SAC RECORDS AT A ZONE CONTROLLER IN A WIDE AREA NETWORK
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2002-Apr-02
SAC (Subscriber Access Control) records are currently not stored at each zone because of mem- ory constraints. When a mobile roams into a new zone, the zone controller must retrieve the SAC record for the mobile from the HLR (Home Loca- tion Register). This process is inefficient and time consuming and increases access time. The increased access time is particularly bad for public safety systems.