H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01)
Patent
CA 2347592
The invention relates to cell level scheduling for handling multicast traffic in routing devices, for example cross-bar switches. The routing device has a plurality of ingress line interface cards (LICs), a plurality of egress LICs, a cross-bar and a controller. Multicast and unicast data traffic passes from the ingress LICs via the cross-bar to the egress LICs. A given multicast data packet is sent from a given ingress LIC to a predetermined set of egress LICs known as the fanout of the given packet. Each ingress LIC has an associated rate of send opportunities. The inventive method allows multicast send opportunities to be spread as evenly as possible over cell periods. The method also invokes a conventional unicast scheduling scheme when no multicast send opportunity is scheduled and a multicast scheduling scheme when one or more multicast send opportunities are present. The schedule is filled out with the fanouts of multicast packets in accordance with the send priority associated with the respective ingress LICs upon which each of the respective multicast packets is queued.
Davis Simon Paul
Reeve Andrew
Borden Ladner Gervais Llp
Roke Manor Research Limited
LandOfFree
Improvements in or relating to packet switches does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Improvements in or relating to packet switches, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improvements in or relating to packet switches will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1728641