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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 9931–9946

Sleep/doze controlled dynamic bandwidth allocation algorithms for energy-efficient passive optical networks

Maluge Pubuduni Imali Dias and Elaine Wong  »View Author Affiliations


Optics Express, Vol. 21, Issue 8, pp. 9931-9946 (2013)
http://dx.doi.org/10.1364/OE.21.009931


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Abstract

In this work, we present a comparative study of two just-in-time (JIT) dynamic bandwidth allocation algorithms (DBAs), designed to improve the energy-efficiency of the 10 Gbps Ethernet passive optical networks (10G-EPONs). The algorithms, termed just-in-time with varying polling cycle times (JIT) and just-in-time with fixed polling cycle times (J-FIT), are designed to achieve energy-savings when the idle time of an optical network unit (ONU) is less than the sleep-to-active transition time. This is made possible by a vertical-cavity surface-emitting laser (VCSEL) ONU that can transit into sleep or doze modes during its idle time. We evaluate the performance of the algorithms in terms of polling cycle time, power consumption, percentage of energy-savings, and average delay. The energy-efficiency of a VCSEL ONU that can transition into sleep or doze mode is compared to an always-ON distributed feedback (DFB) laser ONU. Simulation results indicate that both JIT and J-FIT DBA algorithms result in improved energy-efficiency whilst J-FIT performs better in terms of energy-savings at low network loads. The J-FIT DBA however, results in increased average delay in comparison to the JIT DBA. Nonetheless, this increase in average delay is within the acceptable range to support the quality of service (QoS) requirements of the next-generation access networks.

© 2013 OSA

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4510) Fiber optics and optical communications : Optical communications
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 22, 2013
Revised Manuscript: March 16, 2013
Manuscript Accepted: March 27, 2013
Published: April 15, 2013

Citation
Maluge Pubuduni Imali Dias and Elaine Wong, "Sleep/doze controlled dynamic bandwidth allocation algorithms for energy-efficient passive optical networks," Opt. Express 21, 9931-9946 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-8-9931


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