Link changeover control system for local area network of broadcasting arrangement
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 6, 1993
Grant Date -
N/A
app pub date -
May 8, 1991
filing date -
May 14, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A link changeover control system for a LAN of a broadcasting arrangement has one master supervisor node station and a plurality of normal node stations connected by an active LAN link path and spare LAN link paths. A pilot signal is inserted into a communication signal in the master supervisor node station and the pilot signal is detected in the normal node stations, whereby the active LAN link path is maintained to be used for communication. In the vent of the pilot signal becoming undetectable at least by one of the normal node stations, the master supervisor node station changes the link path used for communication from the acitve LAN link path to one of the spare LAN link paths and, at the same time, the normal node stations changes the link path used for communication from the active LAN link path to the spare LAN link path through which the pilot signal has become detectable.
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