SDN-enabled path computation element for autonomous multi-band optical transport networks

E. Kosmatos; R. Casellas; K. Nikolaou; L. Nadal; D. Uzunidis; C. Matrakidis; J. M. Fàbrega; M. Svaluto Moreolo; A. Stavdas

doi:10.1364/JOCN.492244

Journal of Optical Communications and Networking
Vol. 15,
Issue 11,
pp. F48-F62
(2023)
•https://doi.org/10.1364/JOCN.492244

SDN-enabled path computation element for autonomous multi-band optical transport networks

E. Kosmatos, R. Casellas, K. Nikolaou, L. Nadal, D. Uzunidis, C. Matrakidis, J. M. Fàbrega, M. Svaluto Moreolo, and A. Stavdas

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E. Kosmatos, R. Casellas, K. Nikolaou, L. Nadal, D. Uzunidis, C. Matrakidis, J. M. Fàbrega, M. Svaluto Moreolo, and A. Stavdas, "SDN-enabled path computation element for autonomous multi-band optical transport networks," J. Opt. Commun. Netw. 15, F48-F62 (2023)

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About this Article
History
- Original Manuscript: April 3, 2023
- Revised Manuscript: August 1, 2023
- Manuscript Accepted: September 25, 2023
- Published: October 6, 2023
Virtual Issues
Journal of Optical Communications and Networking Special Issue on Advances in Multi-Band Optical Networks (2023)

Abstract

This paper reports on the design, implementation, and validation of an SDN control plane for multi-band optical networks with externalized path computation. The SDN control plane relies on extending current open and standard interfaces to support dynamic service management and decoupled path computation services on multi-band optical networks while accounting for physical layer impairments, which is critical for successful service provisioning. We detail the multi-band optical network resource management and optimization engine for transparent and translucent networks. The system is experimentally validated in a 22-ROADM BT network with emulated hardware showing the performance of the control plane and the considered workflows.

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Variable	Description
$G$	Network topology graph
$N$	Set of network nodes
$E$	Set of bidirectional optical fiber links (edges)
$B$	Set of active optical bands
$C_{B}$	Set of capacities (number of FSUs) for each optical band in the set $B$
$p$	Path between a source node and a destination node
$p_{s}$	Source node of path $p$
$p_{n}$	Destination node of path $p$
$N_{p}$	Set of network nodes included in the path $p$ , ordered from source to destination
$E_{p}$	Set of edges included in the path $p$ , ordered from source to destination
$S_{g}$	Set of path-split alternatives for a specific path $p$ as an outcome of the path-split algorithms
$b$	Optical band
$R_{B}$	Set of available transmitter types for each optical band in the set $B$ , ordered with increasing value of required FSUs for each transmitter
$r$	Transmitter type
$r_{d}$	Max distance supported by transmitter type $r$
$r_{f}$	Number of consequent FSUs required by transmitter type $r$
$e_{i, j}$	Edge between node $i$ and node $j$
$u$	Utilization of a specific edge $e$ calculated as the ratio between all available FSUs and occupied FSUs.

	E-Band	$S_{1}$ -Band	$S_{2}$ -Band	C-Band	L-Band
$λ$ (nm) - central	1416.5	1466.7	1496.7	1546.9	1594.6
$α$ (dB/km)	0.280	0.246	0.229	0.211	0.210
$D$ (ps/nm/km)	8.63	12.06	13.97	16.96	19.60
$γ$ (1/W/km)	1.65	1.50	1.44	1.32	1.24
$A_{e f f}$ ( $µ m^{2}$ )	70	74	76	80	83
NF (dB)	6	5.5	5.5	5.5	6

Variable	Description
$G$	Network topology graph
$N$	Set of network nodes
$E$	Set of bidirectional optical fiber links (edges)
$B$	Set of active optical bands
$C_{B}$	Set of capacities (number of FSUs) for each optical band in the set $B$
$p$	Path between a source node and a destination node
$p_{s}$	Source node of path $p$
$p_{n}$	Destination node of path $p$
$N_{p}$	Set of network nodes included in the path $p$ , ordered from source to destination
$E_{p}$	Set of edges included in the path $p$ , ordered from source to destination
$S_{g}$	Set of path-split alternatives for a specific path $p$ as an outcome of the path-split algorithms
$b$	Optical band
$R_{B}$	Set of available transmitter types for each optical band in the set $B$ , ordered with increasing value of required FSUs for each transmitter
$r$	Transmitter type
$r_{d}$	Max distance supported by transmitter type $r$
$r_{f}$	Number of consequent FSUs required by transmitter type $r$
$e_{i, j}$	Edge between node $i$ and node $j$
$u$	Utilization of a specific edge $e$ calculated as the ratio between all available FSUs and occupied FSUs.

	E-Band	$S_{1}$ -Band	$S_{2}$ -Band	C-Band	L-Band
$λ$ (nm) - central	1416.5	1466.7	1496.7	1546.9	1594.6
$α$ (dB/km)	0.280	0.246	0.229	0.211	0.210
$D$ (ps/nm/km)	8.63	12.06	13.97	16.96	19.60
$γ$ (1/W/km)	1.65	1.50	1.44	1.32	1.24
$A_{e f f}$ ( $µ m^{2}$ )	70	74	76	80	83
NF (dB)	6	5.5	5.5	5.5	6

Abstract

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Figures (19)

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Equations (2)

Journal of Optical Communications and Networking