| 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: The 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 in which the visited location register 213 is located. The visited system 211 identifies a last accessed technology by a mobile unit 221 in the visited system 211 and forwards the identification of the last accessed technology to the home location register 203. The identification of the last accessed technology may be forwarded to the home location register in a registration notification. The home system 201 may forward a routing request including the identification of the last accessed technology to the visited system.
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