| 摘要 |
An SCR (Selective Call Receiver) (16) that operates in a satellite communication system automatically initiates a re-registration procedure whe n it roams from one message delivery area (10) to another message delivery are a (12). This is accomplished by the SCR (16) determining its present location, determining the distance which it may have roamed from a known previous location and, if that distance exceeds a given distance, initiating the re- registration procedure.
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