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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 1 — Jan. 1, 2013
  • pp: 48–55

Low-Latency Dynamic Bandwidth Allocation for 100 km Long-Reach EPONs

Daisuke Murayama, Noriyuki Oota, Ken-Ichi Suzuki, and Naoto Yoshimoto  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 1, pp. 48-55 (2013)
http://dx.doi.org/10.1364/JOCN.5.000048


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Abstract

We propose a new dynamic bandwidth allocation (DBA) method for long-reach passive optical networks that can reduce the upstream latency. With this method, an optical line terminal allocates bandwidth to long-distance (up to 100 km) optical network units (ONUs) with a transmission request prediction and reduces the latency of the long-distance ONUs. This has no influence on the latency of short-distance ONUs even if they coexist with long-distance ONUs. The results of real machine experiments show that this new DBA method achieves a smaller latency with long-distance ONUs than the conventional DBA technique, and that there is no influence on short-distance ONUs. The latency time and jitter are kept below 1300μs and 1000μs, respectively, for both long- and short-distance ONUs. The experimental results also reveal the effect of the proposed method on bandwidth utilization efficiency and fairness. The degradation in bandwidth utilization efficiency when one long-distance ONU is added is small (0.3%), and the fairness index degradation is negligible (less than 0.1%), when the parameters are optimized. These results indicate the validity of the proposed DBA method.

© 2013 OSA

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms

ToC Category:
Research Papers

History
Original Manuscript: June 25, 2012
Revised Manuscript: October 16, 2012
Manuscript Accepted: November 6, 2012
Published: December 17, 2012

Citation
Daisuke Murayama, Noriyuki Oota, Ken-Ichi Suzuki, and Naoto Yoshimoto, "Low-Latency Dynamic Bandwidth Allocation for 100 km Long-Reach EPONs," J. Opt. Commun. Netw. 5, 48-55 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-1-48

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