3-level database hierarchy for location management in PCS networks

A 3-level hierarchical database architecture is proposed for location management in PCS networks. It adds a regional location register (RLR) for roamers between the home location register (HLR) and the visitor location register (VLR) of the current 2-level database hierarchy in GSM or IS-41. The strategy for location registration and call delivery is described. Calculations show that the signaling…