By Topic

Packet Scheduling in a Low-Latency Optical Interconnect With Electronic Buffers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Lin Liu ; Dept. of Electr. & Comput. Eng., Stony Brook Univ., Stony Brook, NY, USA ; Zhenghao Zhang ; Yuanyuan Yang

Optical interconnect architectures with electronic buffers have been proposed as a promising candidate for future high speed interconnections. Out of these architectures, the OpCut switch achieves low latency and minimizes optical-electronic-optical (O/E/O) conversions by allowing packets to cut-through the switch whenever possible. In an OpCut switch, a packet is converted and sent to the recirculating electronic buffers only if it cannot be directly routed to the switch output. In this paper, we study packet scheduling in the OpCut switch, aiming to achieve overall low packet latency while maintaining packet order. We first decompose the scheduling problem into three modules and present a basic scheduler with satisfactory performance. To relax the time constraint on computing a schedule and improve system throughput, we further propose a mechanism to pipeline packet scheduling in the OpCut switch by distributing the scheduling task to multiple “sub-schedulers.” An adaptive pipelining scheme is also proposed to minimize the extra delay introduced by pipelining. Our simulation results show that the OpCut switch with the proposed scheduling algorithms achieve close performance to the ideal output-queued (OQ) switch in terms of packet latency, and that the pipelined mechanism is effective in reducing scheduler complexity and improving throughput.

Published in:

Lightwave Technology, Journal of  (Volume:30 ,  Issue: 12 )