Telecommunications switches and methods for their operation
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United States of America Patent
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Jan 20, 2004
Grant Date -
N/A
app pub date -
Sep 23, 1999
filing date -
Sep 23, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telecommunications switch for switching protocol data units across communications links connecting the switch into a communications network and supporting multiple service types concurrently is disclosed. The switch includes an ingress processor for receiving protocol data units from a communications link, an egress processor for transmitting protocol data units onto another communications link, and a switching fabric for routing protocol data units from the ingress processor to the egress processor. The switch includes a structure of queues and schedulers that is arranged to provide concurrent class-based and flow-based queuing and scheduling of the protocol data units. This arrangement allows an amount of switching bandwidth to be guaranteed to protocol data units belonging to a given flow and allows classes of service within the flow to be allocated a relative proportion of that bandwidth. The structure is re-configurable in its interconnection of queues and schedulers via a link list in which pointers to the queues and schedulers are stored and updated as required.
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