Telecommunications – Radiotelephone system – Out-of-range indication
Patent
1995-11-15
1999-12-07
Bost, Dwayne D.
Telecommunications
Radiotelephone system
Out-of-range indication
455462, H04Q 720
Patent
active
059998091
ABSTRACT:
A wireless communication apparatus having a first communication device (portable) and a second communication device (stationary) for mutually performing wireless communication. Reception of a wireless communication signal from the first communication device is detected by the second communication device. If no wireless communication signal has been received, the second communication device transmits an alarm signal to the first communication device, and if this state where no wireless communication signal is detected continues for a predetermined period, the second communication device transmits an alarm signal different from the initial alarm signal to the first communication device. Thereafter, the second communication device stops transmission of wireless communication signal to the first communication device.
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Bost Dwayne D.
Canon Kabushiki Kaisha
Wyche Myron K.
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