| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently finding out a mobile unit in a multiple technology environment without wasting a bandwidth on a transmission control channel for each technology. SOLUTION: An apparatus includes a home location register 203 that stores records for mobile units in a home system 201. A visited location register 213 stores records for mobile units presently registered in a visited system 211. The visited system 211 identifies a last accessed technology by a mobile unit 221 in the visited system, and forwards the identification of the last accessed technology to the home location register. The identification of the last accessed technology is forwarded to the home location register in a registration notification. The home system forwards a routing request including the identification of the last accessed technology to the visited system. COPYRIGHT: (C)2008,JPO&INPIT
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