Copy network providing multicast capabilities in a broadband ISDN fast packet switch suitable for use in a local area network
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United States of America Patent
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Apr 19, 1994
Grant Date -
N/A
app pub date -
May 20, 1992
filing date -
May 20, 1992
priority date (Note) -
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Abstract
A switch having a non-blocking, self-routing switching fabric for routing packets from input sources to output destinations on virtual circuits specified by such packets, has a multicast mechanism for routing multicast packets from any one of the sources to copy groups composed of multiple ones of the destinations. This multicast mechanism includes a copy network that is coupled to receive the multicast packets from the switching fabric after the packets have made at least one pass through the switching fabric, and this copy network is configured for making separate copies of each of the packets for each member of the copy group to which the packet is addressed and for applying the copies to said switching fabric, such that the copies are rerouted by the switching fabric to the respective members of the specified copy group.
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