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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Richard A. Linke
  • Vol. 6, Iss. 5 — May. 1, 2007
  • pp: 490–513

Overflow control mechanism (OCM) for Ethernet passive optical networks (EPONs)

Marek Hajduczenia, Henrique J. A. da Silva, and Paulo P. Monteiro  »View Author Affiliations


Journal of Optical Networking, Vol. 6, Issue 5, pp. 490-513 (2007)
http://dx.doi.org/10.1364/JON.6.000490


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Abstract

Feature Issue on Passive Optical Network Architectures and Technologies

The nonfragmentable nature of Ethernet data frames, as well as operation of the priority oriented packet schedulers in the optical network units, in conjunction with heavy network load conditions and the lack of detailed knowledge about the queue's composition at the optical line terminal (OLT) level, result in the creation of upstream channel slot remainders. The existing methods, in the form of nonpreemptive packet schedulers and multithreshold reporting process defined vaguely by the IEEE 802.3-2005 standard, result in either increased packet delay or Ethernet passive optical network (EPON) system incompatibility, respectively, since threshold processing was never officially defined in the scope of the respective EPON standard. We propose an alternative approach, based on basic modifications of the standard and extended GATE multipoint control protocol data unit format and meaning, allowing for the OLT packet scheduling agent to grant always exactly the requested slot size, thus preventing creation of any upstream channel slot remainders. It is estimated that, on average, ∼3% of upstream channel bandwidth can be salvaged when slot remainders are absent in the upstream channel transmission.

© 2007 Optical Society of America

OCIS Codes
(060.4250) Fiber optics and optical communications : Networks
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Passive Optical Network Architectures and Technologies

History
Original Manuscript: January 3, 2007
Revised Manuscript: March 23, 2007
Manuscript Accepted: March 23, 2007
Published: April 25, 2007

Virtual Issues
Passive Optical Network Architectures and Technologies (2007) Journal of Optical Networking

Citation
Marek Hajduczenia, Henrique J. A. da Silva, and Paulo P. Monteiro, "Overflow control mechanism (OCM) for Ethernet passive optical networks (EPONs)," J. Opt. Netw. 6, 490-513 (2007)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-6-5-490

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