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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and V. Chan
  • Vol. 3, Iss. 8 — Aug. 1, 2011
  • pp: A21–A31

Energy-Efficient Error Control for Tightly Coupled Systems Using Silicon Photonic Interconnects

Xuezhe Zheng, Pranay Koka, Michael O. McCracken, Herb Schwetman, James G. Mitchell, Jin Yao, Ron Ho, Kannan Raj, and Ashok V. Krishnamoorthy  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 3, Issue 8, pp. A21-A31 (2011)
http://dx.doi.org/10.1364/JOCN.3.000A21


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Abstract

Future computer systems will require new levels of computing power and hence new levels of core and chip densities. Because of constraints on power and area, optical interconnection networks will play a critical role in these new systems. In this paper, we describe the macrochip, a multi-chip node with an embedded silicon photonic interconnection network that consists of thousands of optical links. For such a large-scale wavelength division multiplexing optical network, we show how to use an energy-efficient error control scheme employing variable-length cyclic redundancy check codes to achieve a desirable residual bit error rate (BER) of 10 23 for reliable system operation with the individual link BER at 10 12 or higher. We use a discrete-event network simulation of the macrochip using uniform random traffic to show that our scheme incurs minimal impact on performance compared to a perfect system with no error control. Using link level energy efficiency and network throughput analysis, we estimate and report network level energy efficiency using the metric of energy per useful bit.

© 2011 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(200.4650) Optics in computing : Optical interconnects

ToC Category:
Optics in the Data Center

History
Original Manuscript: January 19, 2011
Revised Manuscript: May 30, 2011
Manuscript Accepted: June 6, 2011
Published: June 24, 2011

Citation
Xuezhe Zheng, Pranay Koka, Michael O. McCracken, Herb Schwetman, James G. Mitchell, Jin Yao, Ron Ho, Kannan Raj, and Ashok V. Krishnamoorthy, "Energy-Efficient Error Control for Tightly Coupled Systems Using Silicon Photonic Interconnects," J. Opt. Commun. Netw. 3, A21-A31 (2011)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-3-8-A21

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