Status indicator control for cellular mobile telephone system

Details Status indicator control for cellular mobile telephone system Status indicator control for cellular mobile telephone system

1992-05-07

1993-10-19

Ng, Jin F.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 59, 379 60, 455 331, H04M 1100, H04Q 700

Patent

active

052553078

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.

REFERENCES:
patent: 3898390 (1975-08-01), Wells et al.
patent: 4833702 (1989-05-01), Shitara et al.
patent: 5020091 (1991-05-01), Krolopp et al.
Billstrom et al, "A Public Automatic Mobile Telephone" Ericsson Review, #1, 1980.

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