1. CPqD’s optical network
activities and collaboration
opportunities
Miquel Garrich – miquel@cpqd.com.br
Futurenets workshop – 24th February – Campinas, Brasil

2. Optical networks and amplifiers team
Júlio C. R. F. Oliveira: Head of Optical Technology Division
Neil Guerrero: Lead of High Speed Optical Networks group
Juliano R. F. Oliveira: Technical coordinator
Uiara Moura
Anderson Bravalheri
André Rolim
2
André Rolim
Camila de Araujo
Eduardo Magalhães
Heitor Carvalho
Bruno Angeli
Israel Jacob
João Januário
Miquel Garrich
Francisco Helder

3. Outline
• Optical amplification
• WSS-based ROADM
3
• Optical SDN controller
• Add/drop on demand for ROADMs
• (raw) Collaboration opportunities

4. EDFA: Motivation
• EDFAs are key components in optical links/networks
• EDFAs perform nice regeneration of signal power
• However:
4
• Source of system noise
• Gain depends on wavelength
• Thus, when choosing the (set/operating point) gain:
• Choice on the Noise Figure (NF)
• Choice on the Gain Flatness (GF)

5. EDFA: Characterization
• Preamplifier
5
• Booster

6. EDFA: Fitness function
6

7. EDFA: Results
Juliano, Eduardo, Uiara,
Giovanni, Alberto, Luis
Hecker, Edson, Júlio,
J. Maranhão (Padtec),
collaboration with DTU
in OFC 2013
7

8. EDFA: Results
8
Uiara C Moura, Juliano R F Oliveira, Júlio C R F
Oliveira, Amílcar C Cesar in SBMO/IEEE International
Microwave Optoelectronics Conference (IMOC), 2013

9. Outline
• Optical amplification
• WSS-based ROADM
9
• Optical SDN controller
• Add/drop on demand for ROADMs
• (raw) Collaboration opportunities

10. WSS: Motivation
• Constrained choices on the EDFA gain (NF,GF)
• WSS equalization for spectrum flatness
ROADM
10
EDFA
WSS

11. WSS: Characterization (local equalization)
11

12. WSS: Results (global equalization)
12
Eduardo Magalhães, Juliano, Heitor Carvalho, Matheus Magalhães,
Miquel Garrich, Marcos Siqueira, Aldário Bordonalli (Unicamp), Júlio,
“Global ROADM-Based Spectrum Equalizer in SDN Architecture for
QoT Optimization at DWDM Networks” W2A.35 in OFC 2014

13. Outline
• Optical amplification
• WSS-based ROADM
13
• Optical SDN controller
• Add/drop on demand for ROADMs
• (raw) Collaboration opportunities

14. O-SDN in CPqD
• Specialized HW
• Network operating
system communication
• Network functions
and services
• Communication
interfaces
14
interfaces
• Graph network
abstraction
• Legacy control plane
virtualized (GMPLS)
• Global network monitoring
• Adaptive, cognitive and
autonomous performance
optimization

15. O-SDN: YANG modeling for O-NE-OS
• NETCONF-modeling language YANG
models ROADM building blocks and its
interconnections.
• Eases Optical-Network Elements-Operating
System (O-NE-OS)
• The YANG model can be transformed ROADM with
15
in a Multi-graph = (nodes, edges)
• Allows creating a ROADM abstraction
• Supports Intra-node, constraint-based path
computation using graph traversal
3 WSS
KEY:
Black nodes: Chassis system (model) NE Black Edges: NE interfaces
Red nodes: Input interfaces Red edges: Connectivity NE (ACTIVE)
Blue nodes: Output interfaces Blue edges: Connectivity NE (PASSIVE)
Orange edges: Fibers connecting OUT -> IN interfaces

16. O-SDN: Automatic VON instantiation
• Optical network virtualization:
• HS-VON (High Speed Virtual Optical Network):
Optical network for 100Gbps channels and beyond
• Aims to avoid excessive signal degradation
• Main-VON: Legacy optical network
for signals with rate lower than 100 Gbps
16
LSP Creation
Marcos Siqueira, Juliano, Giovanni Curiel, Alberto Hirata, Fabian van ’t Hooft, Marcelo
Nascimento, Christian Rothenberg and Julio “An Optical SDN Controller for Transport
Network Virtualization and Autonomic Operation”, in GLOBECOM 2013

17. Outline
• Optical amplification
• WSS-based ROADM
17
• Optical SDN controller
• Add/drop on demand for ROADMs
• (raw) Collaboration opportunities

18. ADoD: Motivation
• CPqD is currently developing a
ROADM-NG platform with
express banks:
• Broadcast and select
• Route and select
• Add/drop banks that support:
Broadcast and Select
Degree
Inputs
Degree
Outputs
1
N
1
N
Towards / from
add/drop bank
Developed
18
Coupler / splitter
WSS
KEY:
• Colorless: Add/drop ports are not
associated to a specific wavelength.
• Directionless: Add/drop ports are not
associated to a specific ROADM input
or output port.
• Contentionless: Wavelength repetition
inside the same add/drop bank is
allowed (up to ROADM degree size).
• Flexible grid: Reconfigurable
spectrum slots of 12,5 GHz
add/drop bank
Route and Select
Degree
Inputs
Degree
Outputs
1
N
1
N
Towards / from
add/drop bank
Under
development

19. ADoD: Motivation (2)
Broadcast
and Select
Degree
Inputs
Degree
Outputs
1
N
1
N
Towards / from
Route
and
Select
Degree
Inputs
Degree
Outputs
1
N
1
N
Towards / from
Under
development
19
WSS-ADB MCS-ADB
VS-MCS-ADB
Possible
wavelength
contention
Coupler / splitter (Variable-splitter) multicast switchKEY: (VS-)MCSWSSEDFA
• Add/Drop Banks (ADBs) proposed in the literature:
…k
…
m
RxRx Rx
…
m
RxRx Rx
…k
…
m
TxTx Tx
…
m
TxTx Tx
1 N 1 N… …
…k
…
m
RxRx Rx
1
MCS
…
m
RxRx Rx
MCS
N
…k
…
m
TxTx Tx
1
MCS
…
m
TxTx Tx
MCS
N… …
…k
…
m
RxRx Rx
1
VS-MCS
…
m
RxRx Rx
VS-MCS
N
…k
…
m
TxTx Tx
1
VS-MCS
…
m
TxTx Tx
VS-MCS
N
N-1…
N-1
…
… …
Towards / from
add/drop bank
Towards / from
add/drop bank

20. ADoD: Idea
• Add/drop bank on demand (ADoD) consists of an optical backplane that
interconnects fibers from/to each degree, different modules, transmitters
and receivers.
From
degree
1 N 1 N
Towards
degree… …
From
degree
1 32
From
degree
1 32 1 32
From
degree
i. ii. iii.
20
RxRxRx
Optical Backplane
…
k×m
Rx TxTxTx
…
k×m
Tx
…k
…
ADoD modules
…k …k …k
RxRxRxRxRxRxRxRxRxRxRxRx
Backplane
cross-connections
TFA
RxRxRxRxRxRxRxRxRxRxRxRx RxRxRxRxRxRxRxRxRxRxRxRx
i. Example of a synthesized ADoD (only drop direction)
ii. # signals from degrees 1 and 2 increase. Two modules of EDFA +
splitter and a module of tunable filter array are shared.
iii. # signals from 1 and 2 decrease (handled by direct backplane cross-
connections). EDFA + WSS module for incoming signals from 3.

21. ADoD: Flexibility analysis
WSS-ADB MCS-ADB VS-MCS-ADB
• Flexibility and losses of Add/Drop Banks (ADBs) porposed in the literature:
…k
…
m
RxRx Rx
…
m
RxRx Rx
…k
…
m
TxTx Tx
…
m
TxTx Tx
1 N 1 N… …
…k
…
m
RxRx Rx
1
MCS
…
m
RxRx Rx
MCS
N
…k
…
m
TxTx Tx
1
MCS
…
m
TxTx Tx
MCS
N… …
…k
…
m
1
VS-MCS
…
m
VS-MCS
N
…k
…
m
1
VS-MCS
…
m
VS-MCS
N
N-1…
N-1
…
… …
21
2 3 4 5 6 7 8 9 10
0
100
200
300
400
500
600
700
Node degree (N)Flexibilityindex
ADoD
VS-MCS-ADB
MCS-ADB
WSS-ADB
• Flexibility and losses of Add/Drop on Demand:
RxRxRx
1
Optical Backplane
…
k×m
Rx
N 1 N
TxTxTx
…
k×m
Tx
…k
…
ADoD modules
…k …k …k
… …
m
RxRx Rx
m
RxRx Rx
m
TxTx Tx
m
TxTx Tx
W1C.2 in OFC 2014
Miquel Garrich, Juliano, Marcos Siqueira, Norberto Amaya, Georgios Zervas, Dimitra
Simeonidou, Júlio, “Flexibility of Programmable Add/Drop Architecture for ROADMs”

22. Outline
• Optical amplification
• WSS-based ROADM
22
• Add/drop on demand for ROADMs
• Optical SDN controller
• (raw) Collaboration opportunities

23. (raw) Collaboration opportunities
23
• Is there room for Impairment Aware – NFV / VON?
• Network performance can be improved!

24. Thank you!
Let’s collaborate!
Thank you!
Obrigado!
www.cpqd.com.br
miquel@cpqd.com.br