| 摘要 |
Information regarding the present location of a dual-mode (or multi-mode) mobile station with respect to a plurality of communication systems is timely maintained by facilitating automated contact information modifications via, for example, a mobility management server ( 30 ). In a preferred approach, upon receiving a message ( 11 ) evidencing the supported presence of a mobile station in a first communication system comprising a wireless wide area network, one automatically responds ( 12 ) by modifying such contact information as is retained in a Session Initiation Protocol registrar. Testing ( 21 ) can be utilized to assure the propriety of making such alterations and/or deletions.
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