Status indicator control for cellular mobile telephone system
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United States of America Patent
Stats
-
Oct 19, 1993
Grant Date -
N/A
app pub date -
May 7, 1992
filing date -
May 7, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a cellular mobile telephone system wherein a mobile station is provided with a status indicator which provides a HOME indication when the mobile station communicates with a base station in its home system and a ROAM indication when the mobile station communicates with a base station in a 'visited' system, the particular indication that is provided by the mobile station is dependent upon the system identification data (SID) that is received from the base station with which the mobile station communicates. The mobile station also includes a status order control message sensor for sensing an indicator status order control message transmitted by the base station which serves to selectively activate or deactivate the status indicator at the mobile station, notwithstanding that the indicator had been activated previously by the received SID. Thus, whether the mobile station is idle or active, that is, even when voice data is communicated between the mobile station and a base station, a change in the HOME/ROAM status of the mobile station is indicated.
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