Method and apparatus for acquiring emergency service in a mobile radio communication system
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United States of America Patent
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-
Feb 4, 2003
Grant Date -
N/A
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for acquiring an emergency service from one or more candidate mobile radio communication systems. An attempt is made by the mobile radio unit to acquire normal non-emergency service. If the attempt of acquiring normal non-emergency services fails and the user needs to originate an emergency call, an emergency scan list containing one or more candidate mobile radio communication systems is scanned, and an attempt is made to acquire emergency service from one of these systems. The emergency scan list is different from the normal preferred roaming list stored in the mobile radio unit. Next, the invention originates an emergency call in accordance with the service acquired from the emergency scan list.
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