System which routes radio transmissions to selected repeaters for retransmission
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United States of America Patent
Stats
-
Jul 7, 1992
Grant Date -
N/A
app pub date -
May 4, 1990
filing date -
May 12, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio transmission system designed to operate on a single defined frequency channel. The system comprises a central receiver (12), at least one transmitter (14) remote from the receiver and a plurality of repeaters (13) arranged in zones (Z1 to Zn) arround the receiver. Each repeater can receive a signal from a transmitter and re-transmit the message so that it eventually reaches the receiver by way of one or more repeaters. The system includes protection means for protecting the message against loss or corruption, for example by using unique time delays before re-transmission or by addressing a certain sequence of repeaters with alternate paths being provided to guard against the message being lost.
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