Mobile communication system

Details Mobile communication system Mobile communication system

1995-07-11

1997-11-04

Olms, Douglas W.

Multiplex communications

Diagnostic testing

Determination of communication parameters

370332, 455 677, 340539, H04B 1700

Patent

active

056847904

ABSTRACT:
A mobile communication system that can preliminarily inform a user of the possibility of an occurrence of interruption of a call, which is peculiar to the system of the TDMA type. In this mobile communication system, a CPU measures a received level of speech quality by detecting data representing speech quality in an SACCH frame on the basis of a result of analysis of a received frame by means of a receiving portion. In the case where the received level is less than a predetermined value, a counting portion is caused to start counting. If the received level is low in the case of the next SACCH frame, the count is incremented. When the count reaches a predetermined value, a speaker serving as alarming means is operated so as to produce a warning tone. Thereby, a warning is given to a person who is currently using the system.

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Draft Addemdum to NMT Document 900-4 (450), dated May 9, 1990, informally numbered pp. 20-27 (English language).

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