A home location register for a mobile telecommunications network

摘要

A HLR (10) has a bus (11) which interconnects a NAP layer (12), a DBS layer (13) and an OMP layer (14). All accesses to a memory database (26) are through a single channel - the associated DBS (25). The memory database capacity may be easily enlarged by modular addition of DBSs (25) with associated databases (26, 27). Each NAP (20) has a directory service (21) identifying the active DB (26) for each item of subscriber data. Each DBS (25) has a shadow DBS (25) to which it automatically writes for real time synchronisation.