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Multicast to unicast conversion technique

  • US 9,008,089 B2
  • Filed: 06/25/2014
  • Issued: 04/14/2015
  • Est. Priority Date: 06/14/2012
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a multicast queue configured to enqueue multicast packets for downstream destinations, wherein the multicast packets are received from an upstream source;

    a plurality of traffic identifier (TID) queues configured to at least enqueue multicast-to-unicast converted packets for the downstream destinations, the downstream destinations being associated with the plurality of TID queues;

    a backpressure-aware scheduling engine configured to;

    identify in the plurality of TID queues a subplurality of TID queues that are associated with a multicast packet from the multicast queue;

    identify in the subplurality of TID queues a first proper subset of TID queues that are full;

    convert the multicast packet into a multicast-to-unicast converted unicast packet for each TID queue of a second proper subset of TID queues in the subplurality of TID queues, the first proper subset and the second proper subset being disjoint;

    enqueue the multicast-to-unicast converted unicast packet in each TID queue of the second proper subset of TID queues;

    selectively drop multicast packets with respect to the first proper subset of the subplurality of TID queues.

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