Source routing for connection-oriented network with repeated call attempts for satisfying user-specified QOS parameters
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United States of America Patent
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Aug 3, 1999
Grant Date -
N/A
app pub date -
Dec 3, 1996
filing date -
Dec 4, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
In a connection-oriented network where ATM nodes are interconnected by links, periodically updated link status information of the network is stored in a database to indicate resource constraints of the network links. Responsive to a connection request specifying multiple QOS parameters, a first path to a destination is selected and a first signaling message is transmitted containing routing data of the first path toward the destination if resource constraints of the first path satisfy all the specified QOS parameters. If the transmission of the first signaling message is unsuccessful or the resource constraints of the first path do not satisfy all the specified QOS parameters, then a second path to the destination is selected according to contents of the database that correspond to one of the specified QOS parameters, and a second signaling message containing routing data of the second path is transmitted toward the destination.
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