ATM service scheduler using reverse-binary scattering and time-s

Details ATM service scheduler using reverse-binary scattering and time-s ATM service scheduler using reverse-binary scattering and time-s

1997-12-04

2000-03-07

Nguyen, Chau

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370412, 370468, H04L 1228, H04L 1256, H04J 316

Patent

active

060349603

ABSTRACT:
A method for scheduling low delay-jitter cell transmissions for multiple streams of Asynchronous Transfer Mode (ATM) traffic from a node is disclosed. Cells belonging to multiple streams of virtual circuits (VCs) and virtual paths (VPs) are stored in the node's memory. A link controller scans a time-space map to determine when a given stream will be sampled and its cells transmitted from the memory out over a link. The time-space map is comprised of time-slots whose spatial positions within the map correspond to times at which cells can be transmitted. A scattering technique, based on reverse-binary or other mapping schemes, ensures that each given stream occupies time-slots that are well-spaced within the time-space map. This ensures that cells belonging to a given stream are transmitted at well-spaced intervals of time. The scheduler can provide each stream with a guaranteed real number of time-slots per time-space map, which allows for high resolution service rates to be supported without having to resort to using very large maps.

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