Scalability of a Hitless &#x3BB;-Tuning Sequence to Upstream Transmission at Dynamic Wavelength Allocation in WDM/TDM-PON [Invited]

Shin Kaneko; Tomoaki Yoshida; Satoshi Furusawa; Masahiro Sarashina; Hideaki Tamai; Akiya Suzuki; Toshiaki Mukojima; Shunji Kimura; Naoto Yoshimoto

doi:10.1364/JOCN.7.00A492

Journal of Optical Communications and Networking
Vol. 7,
Issue 3,
pp. A492-A497
(2015)
•https://doi.org/10.1364/JOCN.7.00A492

Scalability of a Hitless λ-Tuning Sequence to Upstream Transmission at Dynamic Wavelength Allocation in WDM/TDM-PON [Invited]

Shin Kaneko, Tomoaki Yoshida, Satoshi Furusawa, Masahiro Sarashina, Hideaki Tamai, Akiya Suzuki, Toshiaki Mukojima, Shunji Kimura, and Naoto Yoshimoto

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Shin Kaneko, Tomoaki Yoshida, Satoshi Furusawa, Masahiro Sarashina, Hideaki Tamai, Akiya Suzuki, Toshiaki Mukojima, Shunji Kimura, and Naoto Yoshimoto, "Scalability of a Hitless λ-Tuning Sequence to Upstream Transmission at Dynamic Wavelength Allocation in WDM/TDM-PON [Invited]," J. Opt. Commun. Netw. 7, A492-A497 (2015)

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About this Article
History
- Original Manuscript: July 7, 2014
- Revised Manuscript: November 5, 2014
- Manuscript Accepted: December 5, 2014
- Published: February 12, 2015
Virtual Issues
Journal of Optical Communications and Networking OFC 2014 (2015)

Abstract

This paper clarifies the scalability of the hitless wavelength-tuning ( $λ$ -tuning) sequence for dynamic wavelength allocation (DWA) on a $λ$ -tunable wavelength-division-multiplexing/time-division-multiplexing passive optical network (WDM/TDM-PON). The $λ$ -tuning that induces no data-frame loss, i.e., hitless $λ$ -tuning, is essential in DWA. We derive requirements to prevent two types of upstream data-frame loss that the $λ$ -tuning causes. To clarify the scalability of the hitless $λ$ -tuning sequence against system parameters, we theoretically analyze the maximum input data rate to the optical network units (ONUs) to achieve $λ$ -tuning without upstream data-frame loss while varying values for buffer size and $λ$ -tuning time of the transceivers in ONUs and the DWA cycle. Then, using media access control boards that we developed for symmetric 40 Gbit/s $λ$ -tunable WDM/TDM-PONs, we demonstrate hitless $λ$ -tuning and confirm the validity of the theoretical analysis.

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		Input Data-Frame Volume During $Δ t_{Buffer} (S)$
		$S > T$	$S \leq T$
Average input data rate ( $B$ )	$B > B_{λ}$	Type I	Type II
Average input data rate ( $B$ )	$B \leq B_{λ}$	Type I	No data-frame loss

DWA Cycle Period ( $Δ t_{DWA}$ )	100 ms, 1 s
Wavelength assignment	(1575.37 nm, 1530.33 nm) ⇒
	(1577.03 nm, 1531.90 nm) ⇒
	(1578.69 nm, 1533.47 nm) ⇒
	(1580.35 nm, 1535.04 nm) ⇒…
DBA cycle period	1 ms
Input data rate to UNI	1–10 Gbit/s
$λ$ -tuning time of ONU ( $Δ t_{λ}$ )	100 ns–30 ms
Size of ONU buffer ( $T$ )	16 Mbytes, 32 Mbytes

		Input Data-Frame Volume During $Δ t_{Buffer} (S)$
		$S > T$	$S \leq T$
Average input data rate ( $B$ )	$B > B_{λ}$	Type I	Type II
Average input data rate ( $B$ )	$B \leq B_{λ}$	Type I	No data-frame loss

DWA Cycle Period ( $Δ t_{DWA}$ )	100 ms, 1 s
Wavelength assignment	(1575.37 nm, 1530.33 nm) ⇒
	(1577.03 nm, 1531.90 nm) ⇒
	(1578.69 nm, 1533.47 nm) ⇒
	(1580.35 nm, 1535.04 nm) ⇒…
DBA cycle period	1 ms
Input data rate to UNI	1–10 Gbit/s
$λ$ -tuning time of ONU ( $Δ t_{λ}$ )	100 ns–30 ms
Size of ONU buffer ( $T$ )	16 Mbytes, 32 Mbytes

Abstract

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Equations (4)

Journal of Optical Communications and Networking