In a cellular telecommunication network utilizing home location registers for completion of calls to and from a mobile station, a system and method is disclosed for loading and accessing database information relating to the mobile station, and completing calls to the mobile station while roaming in a...http://www.google.com.hk/patents/US5878348?utm_source=gb-gplus-share專利 US5878348 - System and method for implementing multiple home location registers for a single mobile station in a cellular telecommunications network
