Article

Scheduling for input-queued packet switches by a re-configurable parallel match evaluator

Dept. of Electr. & Comp. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
IEEE Communications Letters (impact factor: 0.98). 05/2010; DOI:10.1109/LCOMM.2010.04.092440 pp.357 - 359
Source: IEEE Xplore

ABSTRACT A parallel match evaluator (PE) selects the most productive match for an input-queued (IQ) switch among several tested. However, current PE-based approaches use N fixed permutations out of possible N!, where N is the number of switch ports. A fixed permutation represents a permanent match between the inputs and outputs. To improve switching performance, this letter proposes a re-configurable PE (RPE) where permutations are selected according to traffic pattern, queue occupancy, or queuing times. This letter shows the performance improvement achieved with the proposed RPE.

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Keywords

current PE-based approaches use N
 
fixed permutation
 
input-queued
 
inputs
 
outputs
 
parallel match evaluator
 
PE
 
performance improvement
 
permanent match
 
permutations
 
possible N
 
proposed RPE
 
queue occupancy
 
queuing times
 
re-configurable PE
 
RPE
 
switching performance
 
traffic pattern