Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-03-27
1998-02-24
Mullen, Thomas
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
3403111, 3404071, 34082544, 455 312, 455458, 455567, H04B 100
Patent
active
057220719
ABSTRACT:
A remote receiving system and apparatus for alerting a mobile communications device user of an incoming call. The remote receiving apparatus is portable and receives a coded radiofrequency signal, including a first preselected identification code, transmitted from the mobile communications device, such transmission occurring upon receipt of the incoming call in the mobile communications device. The remote receiving apparatus further includes a detector for demodulating the received coded radiofrequency signal in order to reproduce the first preselected identification code, a low-pass filter for filtering the demodulated signal, an analog-to-digital converter for converting the filtered signal into a digital signal, including the first preselected identification code, a logic unit for determining whether the first preselected identification code matches a second preselected identification code stored in the logic unit, and an alert transducer to alert the user when the logic unit determines that the first preselected identification code matches the second preselected identification code. By using a coded radiofrequency signal which includes a preselected identification code unique to the particular remote receiving apparatus, a portable and convenient device is provided which can accurately notify a user of incoming messages received in a mobile communications device which is at a remote location from the user.
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Berg Roger William
Lim Choon-Huat Nick
Sato Yutaka
Miller Jerry A.
Mullen Thomas
Rode, Esq. Lise A.
Sony Corporation
Sony Electronics Inc.
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