D.-J. Tsaur, C.-H. Yu, H.-K. Cheng, C.-C. Wu, and W. Lin (Taiwan)
Communication system, packet switching, QoS
guarantees, speedup, Combine input output queueing.
In this paper, we show that the three-dimension virtual
output queue (3D-VOQ) can emulate an output-queued
switch only operating at the line speed. This 3D-VOQ
switch, which provides an exact emulation of an output
queued switch with a broad class of service scheduling
algorithms, requires no speedup regardless of its incoming
traffic pattern and switch size. First, an N×N 3D-VOQ
switch was proposed. In this contention-free architecture,
the head-of-line problems are eliminated with a few
virtual output queues (VOQ) from input sides and output
sides were arranged using sufficient separate queues.
Next, we propose a Small Time-to-leave Cell First
(STCF) algorithm to produce a stable many-to-many
assignment. It is also demonstrated and illustrated that
the proposed 3D-VOQ switch is capable of being used to
mimic an exact OQ switch. Finally, analysis and
simulation are employed to verify the performance of 3D
VOQ and to meet high/low QoS requirements.