G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 12/02 (2006.01) H04L 12/20 (2006.01) H04L 12/56 (2006.01) H04L 29/02 (2006.01)
Patent
CA 2273291
The method of buffering packets in a digital communications device includes defining an n-level hierarchy of memory partitions, wherein each non-top level partition has one or more child partitions at an immediately lower level of the hierarchy. The memory partitions at the top-most level are pre-configured with a target memory occupancy size, and the target occupancy for each memory partition situated at a lower level is recursively computed in a dynamic manner based on the aggregate congestion of its parent partition, until the target occupancies for the bottom-most memory partitions are determined. Each traffic flow which uses the buffer is associated with one of the memory partitions at the bottom-most level of the hierarchy and packet discard is enabled in the event the actual memory occupancy of a traffic flow exceeds its target occupancy. The memory partitions at higher levels are preferably associated with a group or pool of traffic flows, such as traffic flows associated with a particular egress port and class of service, to thereby selectively control aggregate congestion. The method allows full buffer sharing, the weighted distribution of memory space within a memory partition, and scales easily to large systems.
Bonneau Marie-Claude
Davis Tom
Alcatel Canada Inc.
Mccarthy Tetrault Llp
Newbridge Networks Corporation
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