Frame-interval fault detection in a demand assignment TDMA communication system
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United States of America Patent
Stats
-
May 29, 1990
Grant Date -
N/A
app pub date -
Nov 30, 1988
filing date -
Nov 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a demand assignment TDMA communication system, a central station transmits a frame sync and a polling signal at periodic intervals to terminal stations to elicit a response therefrom. Each terminal station transmits a test signal in response to reception of the frame sync. The central station or a repeater station detects the strength of the test signals received by a regular-channel receiver and a spare-channel receiver and determines if each of the receivers is operating normally or abnormally. The response received by the regular-channel receiver is supplied to a utilization circuit when this receiver is determined as operating normally and the response received by the spare-channel receiver is supplied instead to the utilization circuit when the regular-channel receiver is determined as operating abnormally while the spare-channel receiver is determined as operating normally.
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