Method and apparatus for scheduling packets in a packet switch
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United States of America Patent
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Aug 3, 2004
Grant Date -
N/A
app pub date -
Jan 8, 1999
filing date -
Jan 8, 1999
priority date (Note) -
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Abstract
The present invention reduces the number of multicast synchronization delays in a packet switch by determining the mix of packets pending at the input ports. When a sufficient number of multicast packets are ready for transferal, the packet switch preferably transmits a programmed number of multicast packets (or as many multicast packets that exist up to that programmed number). After transmitting these multicast packets, the packet switch resumes preferably transmitting unicast packets. Thus, the number of multicast synchronization delays is reduced over the prior art, the bandwidth utilization of the packet switch is correspondingly increased and the load due to multicast packets and unicast packet is balanced. One embodiment of the invention includes a timer that ensures that multicast packets are transmitted without undue delay.
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