an experimental overview on software defined optical transmission and sdngmpls networking activities...

An experimental overview on software-defined optical transmission and SDN/GMPLS

networking activities in the ADRENALINE testbed

Raul Muñoz, Ramon Casellas, Michela Svaluto, Ricardo Martínez, Josep M. Fàbrega, Ricard Vilalta, Fco. Javier Vílchez,

Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) - Spain

III WTON, May 28-29th, 2014, Campinas, Brazil

III WTON, May 28-29th 2014, Campinas (Brazil)

•Programmable OFDM-based rate/bandwidth variable transponder for software-defined optical transmission supporting adaptive bit/power loading and PAPR reduction techniques •Off-line digital signal processing (DSP) using Matlab code •Digital (SW) / analog (HW) RF mixing available •IM (DSB transmission) •Linear field modulation (SSB) •IQ modulation •Phase modulation (CE-OFDM) •Direct detection (DD) and coherent OFDM (CO-OFDM) •4-nodes mesh network with two optical cross-connects (OXCs) and two reconfigurable add-drop multiplexers (ROADMs) connected with amplified links of 35km, 50km, and 150km.

ADRENALINE Testbed®: Optical OFDM experimental platform

ADC

Optical Modulator

(MZM/PM/IQ)

Off-

line

proc

essin

g (M

ATLA

B)

DAC

DAC

Q

ADC

Oscillo- scope

I AWG

TLS

Optical Detection (DD/CO)

Tx DSP Rx DSP

Off-

line

proc

essin

g (M

ATLA

B)

Photonic Mesh Network (ADRENALINE testbed)

OXC-2

ROADM-2

OXC-1

ROADM-1

150km

35km


DAC

PIN

Rx DSP

ADC

MATLAB

TLS

AWG MATLAB DPO

MZM

BVTx @ BRAS BVRx @ ROADM

Fiber link

VOA

TIA

Photonic Mesh Network (ADRENALINE testbed*)

OXC-1

ROADM-1

OXC-2

ROADM-2

150km

35km

Tx DSP

B2B sensitivity performance (num vs exp) Testbed experiments

Mod. format Bit rate Bsignal Bopt

BPSK (4QAM) 5Gb/s 5GHz 11GHz

4PAM (16QAM) 10Gb/s 5GHz 11GHz

4PAM (16QAM) 8Gb/s 4GHz 9GHz

BL: BPSK/4PAM (40%/60%)

8Gb/s 5GHz 11GHz

[1] M. Svaluto, J. M. Fabrega, F. J. Vilchez, L. Nadal, V. López, G. Junyent, Experimental Validation of an Elastic Low-Complex OFDM-Based BVT for Flexi-Grid Metro Networks , in Proc. ECOC 2013, paper We.1.E.5

Bit/Power loading BVT for flexgrid MAN


All-optical OSNR estimation of Optical OFDM signals

Joint work with Universidad de Zaragoza and Aragón Photonics

OFDM subcarrier monitoring by means of high-res optical spectrum analysis

Preliminary results:

The guard band and spectral gaps are used for estimation of OSNR in 0.1 nm

Measured ASE: -31.21 dBm

Est. OSNR 23.50 dB Est. ASE -30.72 dBm



[2] J. M. Fabrega, P. Sevillano, M. Svaluto, J. J. Martínez, A. Villafranca, J. M. Subías, «All-Optical In-Band OSNR Measurement in Intensity-Modulated Direct-Detection Optical OFDM Systems» , in Proc. ICTON 2013, paper Mo.D1.5


λ1 λ1

Sliceable BVT

[1] M. Svaluto, et al. «Experimental Validation of an Elastic Low-Complex OFDM-Based BVT for Flexi-Grid Metro Networks,» in proc. ECOC 2013, paper We.1.E.5 [3] R. Muñoz, et al. “Dynamic Differential Delay Aware RMSA for Elastic Multi-path Provisioning in GMPLS Flexi-grid DWDM Networks,” in proc. OFC 2014, paper W3.A.2 [4] J. M. Fabrega et al. “Experimental Demonstration of Elastic Optical Networking using Time-Sliceable Bitrate Variable OFDM Transceiver,” in proc. OFC 2014, paper Tu2.G.8

node-1

node-N

Optical Mod.

DAC DSP

λ2 λ3

BVRx

BVRx

λ1-λm

λN

TLS

TLS

DAC DSP

Optical Mod.

Optical Network

Aggregator (coupler/mux)

. . .

λ1 λ1 λ2

node-2

BVRx

Optical Mod.

DAC DSP

TLS

λ3

λ3 λN λ1 λ2

Time/Frequency S-BVTx

. . .

λ1 λ1 λ2 λ2

λ1 λ1 λ2 λ2

OFDM BVT as building block for future S-BVT [1][3-4]:

Array of BVTs with tunable laser sources

Each subTx with variable capacity and sub-wavelength granularity

Possibility of time/wavelength switching at source node

Multi-band/Multi-flow OFDM with optical aggregator/distributor

• Sliceable BVT (S-BVT): set of virtual transponders able to generate a flow of great capacity, which can be suitably sliced as multiple flows towards different nodes

• Advanced BVT functionality: aggregated flow @ source node time and frequency sliceable in multiple flows directed towards different destinations


ADRENALINE Testbed®: IT and Network orchestration

6

WSON/SSON

VM 1

VM 2

VM N

Host 1

OVS

…

OFC PCE Active

Stateful PCE

OpenFlow-controlled Ethernet/MPLS

Switches

OpenFlow

VM 1

VM 2

VM N

Host 2

OVS

…

Datacenter 1

Virtual IT resources

Network Orchestration

OFS

OFS

OFS

VM 1

VM 2

VM N

Host 3

OVS

…

OFC

OpenFlow-controlled Ethernet/MPLS

Switches

OpenFlow

VM 1

VM 2

VM N

Host 4

OVS

…

Datacenter 2

OFS

OFS

OFS

SDN IT and Network orchestration (SINO)

OFC BGP-LS


ADRENALINE Testbed®: GMPLS/SDN Control plane emulator

7

74 Commodity Servers to emulate SDN, OpenFlow and GMPLS/PCE

Control plane architectures for different transport technologies

INTERNET Disk Server

(NFS)

IPSec Gateway

Testbed Controller

Web - server (Drupal/ Apache) Development

server

Remote Testbed operation and

experimentation

External Control Plane

Interconnection

ADRENALINE Network Configurator ( ADNETCONF )

ADRENALINE Network Traffic Generator ( ADNETGEN )

Ethernet Switches

CTTC Testbed Operation

Center (TOC)

GMPLS Controller

Active Stateful

PCE

Stateless PCE

OpenFlow Controller

OpenFlow Agent

SDN Orchestra

tor


GMPLS control plane with stateless PCE for flexi-grid DWDM networks

8

Adaptive

NMS PCE

Net

wor

k St

ate

TED Path

Com

p

LSP Setup /Reroute/ Release

Request

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

PCEP

TED Sync.

PCEP

OSPF-TE, RSVP-TE and LMP

Provisioning Interface

IGP/BGP-LS Participation, Out-of-band synch, etc.

• LSP Setup/Reroute/Release • Network state dissemination • Neighbor discovery and Link

property correlation

• Path computation services (new connections, re-optimization, restoration)

LSPDB


Experimental assessment of a combined PCE-RMA and distributed spectrum allocation mechanism for GMPLS Elastic CO-OFDM Optical Networks Phase I: static network paths characterization (network planning):

K-shortest paths for each pair of distinct source-destination nodes N (N-1) K paths.

Classify them according to their distance/length and hop count, reducing the set to a number of canonical cases simulated Coherent O-OFDM (CO-OFDM) transmission

Phase II: PCE-based on demand path computation:

Dynamic path computation based on a CSP algorithm using

No resource information (i.e., unconstrained)

Aggregated per TE link information (i.e. unreserved spectrum )

Detailed per TE link information (i.e., status of the nominal central frequencies)

Path computation can apply either a conservative optical spectrum estimation (worst-case modulation) or an iterative estimation (path computation is repeated with less efficient modulations)

Perform table lookup (Phase I), obtain feasible combinations of normalized data rate, modulation format (4-QAM OFDM, 16-QAM OFDM), Symbol Rate, FEC, required spectrum and sub-carriers.

A new ERO sub-oject named RMSA has been defined, which conveys the PCE assigned optical parameters (modulation, FEC, and spectrum).

Proposal of preliminary pre-standard GMPLS signalling and routing protocol extensions for flexi-grid optical networks.

9

• Ramon Casellas, et al.,, IEEE JSAC, Vol. 31, No 1, Pages 49-61, January 2013. • R. Casellas, et al., IEEE/OSA JOCN , Vol. 4, Issue 10, pp. B1-B10, November 2012.

200400

600800

10001200

1

2

3

4

50

5

10

15

20

25

30

35

Distance (km)Hop Count

Opt

ical

Spe

ctru

m w

idth

(GH

z)

OFDM 16-QAM

OFDM 16-QAM

OFDM 16-QAM

OFDM 16-QAM

OFDM 16-QAM

OFDM 4-QAMOFDM 4-QAM

OFDM 4-QAM


Dynamic Differential Delay Aware RMSA for Elastic Multi-path Provisioning in GMPLS Flexi-grid DWDM Networks

10

OTUC3 Prov. PCReq (OTUC3)

PCRep (No path) PCReq (OTUC2, OTUC1)

PCRep (ERO1, ERO2) LSP1 req (ERO1)

LSP1 resp (ERO1)

LSP2 req (ERO2)

LSP2 resp (ERO2)

RSVP-TE PATH / RESV (LSP1 PROV)

RSVP-TE PATH / RESV (LSP2 PROV)


GMPLS control plane with active stateful PCE

An active stateful PCE can compute paths based on both the TED and the LSPDB, and additionally can control (i.e., re-optimize) existing LSPs delegated by the GMPLS controllers

11

Adaptive NMS

LSPDB

PCE server

Net

wor

k St

ate

TED Path

Com

p

LSP

Stat

e

LSPDB

TED Synch

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

• LSPDB Synch • LSP Control Delegation • LSP Reroute Request

• Path computation services (new connections, re-optimization, restoration)

LSP Setup /Reroute/ Release

Request

• LSP Setup/Reroute/Release • Network state

dissemination • Neighbor discovery and

Link property correlation


GMPLS control plane with active stateful PCE with instantiation

An active stateful PCE with instantiation can compute paths based on both the TED and the LSPDB, setup/release new LSPs, and re-optimize existing LSPs.

PCE becomes a full connection controller.

12

LSPDB

PCE Controller

N

etw

ork

Stat

e

TED Path

Com

p

LSP

Stat

e

LSPDB

TED Synch

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

• LSP setup/reroute and release request services

• LSPDB Synch • LSP Control Delegation • LSP Reroute Request • LSP Setup/Release Request

• LSP Setup/Reroute/Release • Network state

dissemination • Neighbor discovery and

Link property correlation

Adaptive NMS


Dynamic Provisioning via a Stateful PCE with Instantiation Capabilities in GMPLS-Controlled Flexi-grid DWDM Networks

13


OpenFlow control plane

Control plane is decoupled from data plane and logically centralized in a single controller

A well-defined API allows applications to control the network (defining the network and how it is virtually interconnected)

A vendor-agnostic and standardized interface between the controller and the data plane (e.g., OpenFlow, Forces)

14

Adaptive NMS

• Path Computation Services • Connection Setup /Reroute/

Release/ Request LSPDB

• Connection Setup/Reroute/Release

• Network state discovery

OpenFlow PCEP

Not Defined

Net

wor

k St

ate.

TED

SDN Controller

L

SP S

tate

LSPD

API

Path

Com

p


OpenSlice: an OpenFlow-based Control Plane for Spectrum Sliced Elastic Optical Path Networks


OpenFlow control plane: PCE as external application The PCE (stateless or passive stateful) is formally separated from the SDN controller.

The PCC is an application of the controller that requests path computation to the PCE.

The TED and LSPDB may be obtained from an external server, or through the PCC.

16

OpenFlow Controller

TED LSPDB

API

• Path Computation Services • TED Synch • LSPDB Synch

Adaptive NMS

PCC

PCE

LSPDB TED

• Path Computation Services • Connection Setup /Reroute/

Release/ Request

LSPDB



OpenFlow PCEP

Topo

logy

Se

rver

.

TED

L

SP

Serv

er.

LSPD

L. Liu, et al., “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of …,” ECOC 2012, Paper Tu.1.D.3, Sep. 2012 L. Liu, et al., “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” OFC/NFOEC 2012, Paper OM3G.2, Mar. 2012


OpenFlow control plane: Integrated PCE and OpenFlow controller

Full integration of the OpenFlow controller and an active stateful PCE with instantiation capabilities.

Interfaces are internal and both components have access to a single instance of the TED and LSPDB.

17

Integrated OpenFlow and PCE

Controller

TED LSPDB

API

Adaptive NMS

• Connection setup/reroute and release request services

LSPDB



OpenFlow PCEP


An Integrated Stateful PCE / OpenFlow controller for the Control and Management of Flexi-Grid Optical Networks

18


NOX

Beijing, China Tokyo, Japan Barcelona, Spain

L. Liu, et al., “First field trial of an OpenFlow-based unified control plane for multi-layer multi-granularity optical networks,” OFC/NFOEC 2012 Postdeadline, Paper PDP5D.2, Mar. 2012

OpenFlow

OBS WSON

IP IP IP

WSON IP

WSON

OpenFlow-controlled IP/OBS/fixed-grid WSON

IP Router

Transponder

OBS Router

PXC

OpenFlow Control Plane: Field Trial and Multi-vendor Interoperability


OpenFlow Control Plane: Field Trial and Multi-vendor Interoperability (cont’d)

M. Channegowda, et al,, First Demonstration of an OpenFlow based Software-Defined Optical Network Employing Packet, ECOC 2012, Postdeadline Paper Th.3.D


SDN network orchestration: Physical network topology and Centralized Path Computation

21

Flow Programmer

REST API Topology Rest API

PCEP BGP-LS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

SDN Controller

REST API

OpenFlow GMPLS

Controller TED LSPDB

SDN Controller

REST API

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB OpenFlow

Orchestration Controller

Provisioning Manager TED

Topology Server

Active Stateful PCE

TED LSPDB TED

Topology Server

VNTM

LSPDB Flow

Server

PCE


22

First international SDN-based Network Orchestration of Variable-capacity OPS over Programmable Flexi-grid EON

PCEP extensions for openflow


SDN Network orchestration: abstracted network topology and Distributed Path Computation

23

PCEP BGP-LS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

SDN Controller

REST API

OpenFlow GMPLS


SDN Controller

REST API

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB OpenFlow



Topology Server

Active Stateful PCE

TED LSPDB TED

Topology Server

VNTM

LSPDB Flow

Server

Flow Prov.

Manager

Abstract Topology Manager

Path Segment

Expansion

Flow Prov.

Manager

Abstract Topology

Server

Path Segment

Expansion

PCE


ABNO-based Network Orchestration of end-to-end Multi-layer (OPS/OCS) Provisioning across SDN/OpenFlow and GMPLS/PCE Control Domains

24

Domain A (OPS) 1

1

Virtual OCS Node – V4

Domain B Domain A Domain C

A1 B4 B1

Virtual node OPS -V1

1

1

E4

E1

Domain E Domain F

1 1 3

2

Virtual OPS Node - V2

Virtual OCS node - V3

B2

2

2

1

Domain B(Hybrid OCS/OPS)

3

2 3

Domain F (OPS)

3 1

1 Virtual node OPS - V8

1

OPS

OCS

Virtual OPS Node – V6

Virtual OCS node – V7

2

Domain E (Hybrid OCS/OPS)

3 2

1

2

1 2

1

3

1

E2

E3

1

1 2

3

A2

A3

F1

F2

F3

B3

Abstracted Topology

Physical Topology

C2 C1

C3

10 20

Domain C (OCS)


SDN Network orchestration: Active Stateful Hierachical PCE (AS H-PCE)

25

PCEP BGP-LS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

SDN Controller

OpenFlow GMPLS


SDN Controller

REST API

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB OpenFlow



Topology Server

Active Stateful PCE

TED LSPDB TED

Topology Server

VNTM

LSPDB Flow

Server

Abstract Topology

Server

REST API

Abstract Topology

Server

PCE

Active Stateful

PCE

Active Stateful

PCE

PCEP

PCEP PCEP


SDN based Provisioning Orchestration of OpenFlow/GMPLS Flexi-grid Networks with a Stateful Hierarchical PCE

26

0

10

20

30

40000 42000 44000 46000 48000 50000 52000 0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

h i s t o g r a m

c d

microseconds

y


Final target: Control orchestration Protocol (COP)

27

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

OPS

SDN Controller

OpenFlow GMPLS


SDN Controller

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB

GMPLS Controller

TED LSPDB OpenFlow


Provisioning Manager PCE TED

Topology Server

Active Stateful PCE

TED LSPDB TED

Topology Server

VNTM

LSPDB Flow

Server

Flow Segment Manager

Abstract Topology Manager

Path Segment

Expansion

Flow Segment Manager

Abstract Topology

Server

Path Segment

Expansion

COP

COP COP COP

COP COP


Multi-domain transport Network Virtualization

Network Hypervisor (Abstraction, Partitioning and Composition)

GMPLS Controller

GMPLS Controller

GMPLS Controller

GMPLS Controller

GMPLS Controller

GMPLS Controller

Stateful PCE

TED LSPDB

Stateful PCE

TED LSPDB

SDN Controller

SDN Controller

Active Stateful PCE

TED LSPDB

SDN Controller

REST API

OpenFlow


Dynamic Multi-domain Virtual Optical Networks Deployment with Heterogeneous Control Domains

29


Experimental demonstration of a Virtual Optical Network Resource Broker and Compositor for dynamic GMPLS WSON infrastructure services

30

LDLink Resource

Manager

Connection ControllerGMPLS RSVP-TE

TED

GMPLS OSPF-TE

Path Computation

HALOLRM

Routing Controller

1G PCIeRJ45

OCC

…

IP FORWARDING

1G PCIeRJ45

FIB

LDLink Resource

Manager

1G PCIeRJ45

LDLink Resource

Manager

Connection ControllerGMPLS RSVP-TE

TED

GMPLS OSPF-TE

Path Computation

HALOLRM

Routing Controller

1G PCIeRJ45

OCC

…

IP FORWARDING

1G PCIeRJ45

FIB

LDLink Resource

Manager

1G PCIeRJ45

PHYS

ICAL

HO

ST

1G PCIeRJ45

1G PCIeRJ45

1G PCIeRJ45

GUES

T

GUES

T

DATA

PLA

NE

KVM bridge

KVM bridge

KVM bridge

Virt

ualiz

edIP

CC

Virt

ualiz

edIP

CC

Virt

ualiz

edCC

I


Functional and structural fixed-mobile convergence.

31

eNodeB

Residential

Access Aggregation Core

MPLS-TP

WSON

AEN

Business

AEN PON

IP backbone

Mobile Core (EPC)

Point-to-point links

xDLS

FTTH

CSG

SGW

BNG

PGW

SDN Ctrl

Cloud (Datacenter)

… CDN VNFs

Cloud Router

- AAA - vEPC (only control i.e., MME,

S/PGW-C) - … NFV


Summary

Overview of the most outstanding experimental research activities on optical networking and systems carried out by CTTC in the ADRENALINE testbed in the framework of European research projects.

Summary of main R&D areas requiring significant research effort:

Software-defined optical transmission and elastic network programmability for time, frequency and space division multiplexing.

Multi-carrier transmission technologies for adaptive bandwidth/spectrum usage.

Optical Transport SDN for network slicing and unified multi-layer control

GMPLS/PCE control plane architectures for carrier-grade multi-domain backbone optical networks

SDN orchestration for end-to-end provisioning and network virtualization in multi-domain and multi-layer optical transport networks with heterogeneous control planes.

Integrated IT and optical network resource orchestration for intra and inter datacenter connectivity.

Functional and structural fixed-mobile convergence.

º

32

Thank you! Questions?

33

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an experimental overview on software defined optical transmission and sdngmpls networking activities...

Technology

ofdm bvt

optical transmission

optical cross

bvrx optical mod

noden optical mod

vm n host

coherent ofdm coofdm

n tls tls dacdsp optical