Monitoring system for radio communication apparatus

Details Monitoring system for radio communication apparatus Monitoring system for radio communication apparatus

1989-05-30

1991-06-25

Kuntz, Curtis

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

455226, H04B 1700

Patent

active

050274279

ABSTRACT:
A monitoring system and method for a radio communication apparatus, including a base station and a plurality of portable units, for monitoring a state of each of the portable units. The base station transmits a first asking signal to each of the portable units at each occurrence of a first predetermined time period. Each portable units replys to the first asking signal only when a state of the portable units becomes abnormal. The base station also transmits a second asking signal to each of the portable units at each occurrence of a second predetermined time period. Each portable units replys to the second asking signal to indicate an operation state of the portable unit.

REFERENCES:
patent: 4603325 (1986-07-01), Marino et al.
patent: 4648123 (1987-03-01), Schrock
patent: 4780885 (1988-10-01), Paul et al.

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