AlcaLu Zero Touch Photonics

Networking in DWDM systems

Zero Touch PhotonicsZero Touch Photonics

Péter BartaAndrás Kalmár7-9. of April, 2010 - Debrecen

All Rights Reserved © Alcatel-Lucent 20102 | Zero touch photonics | April 2010

Outline

Drivers

Flexibility and transparency benefits

n Tunable ROADM (Reconfigurable Optical Add/Drop Multiplexer)

n N-Degree T-ROADMs (N-Directions)

n Optical resilience and restoration

n System automation

System scalability

Management & planning


Drivers





n System automation

System scalability



Transformation Drivers for Photonic Networks

VoIP

Enhanced Internet ServicesTriple Play

bundle

IPTV(incl. HDTV, VoD)

Blended, personalized

voice,video& data

services

2000 2005 today Coming soon

MoreBandwidth

!New services (and new players) are emerging, requesting huge bandwidth growth in photonic networksn Fixed and mobile, personalizedn Increased popularity of new Video and Internet

applications (> 6 x growth between 2004 and 2008)

Service providers are facing new challengesn React faster, providing better time-to-service□Higher flexibility and capacity

n Control costs□Highly automated operations and resilience


Challenges

Increased traffic demands mean:n Significant growth of the number of the services to deploy within the

WDM network (more and more difficult to handle, to administrate, etc.)

n More dynamic nature of the servicesn More diverse end points of the services

To meet these challenges networking approach shall be introduced in the DWDM networks instead of the static systems deployed today.


Static Networks Based on fixed Wavelength filters

Typical WDM Network today HUB

Ch 1-8Ch 1-8

Ch 25-32Ch 25-32

Ch 17-24Ch 17-24Ch 9-16Ch 9-16

Ch 1

-8Ch

1-8

Ch 2

5-32

Ch 2

5-32

Ch 1

7-24

Ch 1

7-24

Ch 9

-16

Ch 9

-16

OADM

OADM

OADM

OADM

Physical WDM Ring


Static Networks Based on fixed Wavelength filters

n Topology and capacity/node determined at time of network design□ Traffic projection based upon best estimates at the time□ Frequent changes even during design/bid/deployment□ Not always cost effective to modify the system

n Can lead to premature system exhaust□ Expected system life time: 5 – 10 years□ No accurate traffic projections available for such a long period□ Insufficient No. of wavelengths available to hot spots□ Unlit wavelengths to cold spots cannot be utilized

n Topology is inconsistent for emerging applications□ Telephony, SAN, Enterprise, VoIP topologies looks different


Drivers





n System automation

System scalability



Automation

Eliminates manual

intervention

Performance

Eliminates regeneration

points

Integration

Eliminates multiple

equipment

§ True Networking

§ Wavelength management and switching

§ OAM and Survivability

§ Reduced TCO

§ Improvedtime-to-service

Flexibility

Eliminates need to forecast traffic

Zero-Touch Transparent Photonic Networks

Multi-degree, Gain Equalization, New modulation formats, 40G/100G, Raman, …

C+DWDM, multi-reach, GE ADM, L2 switching, …

MultidegreeMeshedROADM, tunable lasers and filters, …

Auto power adjust., GMPLS/ASON restoration, OTH, smart photonic manager, …

Transforming WDM Networks

Zero-Touch Transparent Photonic Networks transform WDM into true transport networking for simplified and accelerated operations


§Wavelength routing at intermediate nodes

ROADM § Increased connectivity (mesh)

§ Color-less ports

§Multicasting

§Wavelength routing e2e

§ Path, QoS, power monitoring

§Misconnections management

Multi-degree

TOADM –

Full Tunability

E2E Traffic Management § GMPLS/ASON

§ Re-coloring

Photonic Restoration

§ Full Automation

§ Low cost-per-bit photonic bandwidth resilience, no blocking, more resources

§ Complement digital survivability (TDM/OTN, packets)

TouchTouch--less, flexible networking layer for TCO control less, flexible networking layer for TCO control

§ Full Operations

§ Touch-less design, planning and operations

§ NOC based automated commissioning, supervision and operations

§ Full Flexibility

§ Simple design, planning (highly reduced blocking), operations and inventory

§ No need to go to sites

§ Easier design

§ Still need to go to sites for the add/drop

§ Still need to go to sites for the add/drop

WSS T&ROADM Unique ArchitectureTraditional ROADM Architecture

WSS: Wavelength Selective Switch; T&ROADM: Tunable ROADM

Technology Enablers for Zero-Touch Photonic NetworkingBeyond Multi-Degree ROADM

Wavelength Tracker


Drivers





n System automation

System scalability



More transparent directions:è less OEO and sub-λ switching

Flexibility: a key enabler

add drop rerouteè restoration

Tunable ROADMwest east

Color-independent add drop:Any color to any port

ROADMwest east

colored add drop

Automated network provisioningand system tuning

Ease network operation

Improve network resilience

Route-fixed add drop

Route-fixed add drop

Degree-N

Degree-N

Gbit/km cost reduction


TOADM architecture

WSS

Filter (East)THRU

WDM IN

AMP IN

AMP OUT(Optional)

WDM IN

AMP OUT(Optional)

AMP IN

Filter (West)

WSS

Transponder

Transponder

Transponder

Transponder

8 Colorless ports 8 Colorless ports

…Scalable TOADM/ROADM/N…Scalable TOADM/ROADM/N--degree node architecture… degree node architecture…


N-Degree DWDM node architecture

WSS

Filter (East)THRU

WDM IN

AMP IN

AMP OUT(Optional)

WDM IN

AMP OUT(Optional)

AMP IN

Filter (West)

WSS

Xpdr

WSS

Filter (North)THRU

WDM IN

AMP IN

AMP OUT(Optional)

WDM IN

AMP OUT(Optional)

AMP IN

Filter (South)

WSS

Xpdr

XpdrXpdr

Xpdr

Xpdr

XpdrXpdr

SFD44

SFD44SFD44

SFD44

6 colorless portsBB port

BB port

BB port

BB port

6 colorless ports

6 colorless ports 6 colorless ports


T&R-OADM: value proposition

Benefits of the Tuneable add-drop functionality:1. Set-up or re-engineer a circuit within minutes□ Non-tuneable ROADMs avoids intervention at intermediate sites, but still require

intervention at circuits endpoints□ Tuneable architectures remove intervention at circuits endpoints (provided that

transponders are available)


The need: re-engineering a circuit

A

B C

D

Initial link set-up: existing circuits A-D and B-C

New need: change circuits to A-C, B-D

TR-OADM TR-OADM TR-OADM TR-OADM


Standard approach: non-tuneable ROADM

A

B

D

Non-Tuneable ROADM architecture:

n Go to site D, and change transponder cabling

n Go to site C, and change transponder cabling

n Activate new service

C

R-OADM R-OADM R-OADM R-OADM


Tuneable ROADM: re-engineering a circuit within minutes

A

B C

D

Tuneable ROADM architecture:n Just re-program your DEMUX ports, no site intervention needed!

TR-OADM TR-OADM TR-OADM TR-OADM



Benefits1. Set-up or re-engineer a circuit within minutes□ Non tuneable architectures avoid intervention at intermediate sites, but

require still intervention at circuits endpoints□ Tuneable architectures allow to avoid intervention at circuits endpoints

(provided that transponders are available)2. Make channel planning unnecessary□ All items are “colorless”, i.e. not associated to a specific wavelength


T&R-OADM value proposition:Make channel planning unnecessaryInitial traffic plan:n Dual homed traffic matrix with minimum frequency usage

A B C D E F

New need:n Install a new service A-B and B-F, A-C and C-F...


Non-tuneable ROADM:n Deploy new set of MUX/DEMUX, as the green MUX-DEMUX channels are fully used

A B C D E F

Fixed-color add/drop ports

NON-tuneable MUX/DEMUX

T&R-OADM value proposition:Make channel planning unnecessary

Non TunableR-OADM

Non TunableR-OADM

Non TunableR-OADM

Non TunableR-OADM

Non TunableR-OADM

Non TunableR-OADM


Tuneable ROADM:n Just re-program the tuneable MUX ports to any color in the C+ band

A B C D E F

Unprogrammed ports

Programmed ports

Tuneable MUX/DEMUX


TR-OADM TR-OADM TR-OADM TR-OADM TR-OADM TR-OADM


Simulation:n Ring networkn Any-to-any traffic:

Random traffic evolution, from 1 to max capacity,

n New channel assignment decided at each step without any knowledge of the future demands

Graph:n X-axis: # of nodes in the ringn Y-axis: MUX port utilization

in %, at full-channel loading

Number of nodes in the ring

MU

X po

rt u

tiliz

atio

n (%

) T&R-OADM

Non-tuneable R-OADM

T&R-OADM up to 3.5 times more efficient than

non-tuneable R-OADM !




Benefits1. Set-up or re-engineer a circuit within minutes□ Non tuneable architectures avoid intervention at intermediate sites, but

require still intervention at circuits endpoints□ Tuneable architectures allow to avoid intervention at circuits endpoints

(provided that transponders are available)2. Make channel planning unnecessary□ All items are “colorless”, i.e. not associated to a specific wavelength

3. Dramatically simplify logistics□ Reduce the lead-time to define an order (no longer any need to check the

installed base)□ Eliminate possibilities of errors when ordering new items

(wrong transponders and MUX colors is a typical cause of errors)□ Simplify and optimize spares management


CAPEX benefits:Degree-N transparency

European national network

AVERAGE NODECONNECTIVITY = 3.1

Source: Alcatel-Lucent study

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000

APE 14 spans APA 20 spans

WB/WSSAmplifierMUXTPD

Transparentdegree-N

OOO nodes

Degree-2ROADMs

-28%

With O-SNCP protected traffic

Network studies show ~30% CAPEX savings with Transparent OOO nodes

Map of physical links and traffic demands

Remove external nodes (e.g. SDH, Routers,..) for Ring Interconnections


The local OTS ports represents the ultimate flexibility:•local add/drop traffic is not dependent on any specific direction•Paths can be provisioned in the photonic domain

•The enabler for photonic restoration !

The next step: Wavelength rerouting to increase the overall network reliability with T&ROADM:

1

2

3

L

Local OTS Port: Towards photonic transparent networks

Direction 2

pool of regenerator on local OTS port can beaccessed dynamically for

new connections


Drivers





n System automation

System scalability



Colored, direction dependent nodes (ROADM network) / 1

nInitial path configuration


Colored, direction dependent nodes (ROADM network) / 2

Remote cfg on intermediate

nodes

NMS

nRerouting for maintenance activity


Colorless, direction dependent nodes (TOADM) / 1

nInitial network condition

λ1

λ1



nRerouting for maintenance activity with wavelength reallocation

λ1

λ2

λ1 à λ2Solving possible

wavelength contention issues



nRerouting for maintenance activity with wavelength reallocation

λ1

λ2

λ1 à λ2Solving possible

wavelength contention issues


nodes

NMS

Remote wavelength

reconfiguration

NMS


Colorless, directionless nodes(TOADM) / 1

λ1

λ1


nInitial network condition


Colorless, directionless nodes(TOADM) / 2

λ1

λ1

λ1


nodes

NMS



OChNE

Automated photonic layer: GMPLS for fast service setup (BW-on-Demand), restoration…

Switched Connection restoration supporting multiple failures

GMPLS

RSVPRSVP--TETE

RSVPRSVP--TETE

UNI

OOO Transparent OOO Transparent DomainDomain

UNI UNI

UNI

OChNE

OChNE

OChNE

OChNE

IP/MPLS router

Multi-Service XC

degree-N nodeOChNE

Source-based restoration mode : photonic routing engine for optical route

choice

n Faster service setupn Automatic restorationn High level of resiliencen Good resources usagen Automated discovery

Automatic check Optical Path (direct or

regen)

GMPLS benefits:


Drivers





n System automation

System scalability



The boundary condition: Spectral efficiency is keyNetwork capacity is growing

à Higher spectral efficiency ?

à Wider amplification bands ?

à Light another fiber ?

à What is lowest cost ?

Support legacy systems

à 50-GHz channel spacing

à Multiple ROADMs

Trade regeneration cost with transparent reach

à Cost / complexity of transponders

à Optically-routed network impairments: ROADMs, PMD, CD, Nonlinearities

[Magill, LEOS’07]


Scalability:100 Gigabit Ethernet transport

Moving to 100GE is to increase capacity, soèLink capacity needs to be increased accordingly*èIn core networks, scalability of fiber links clearly advocate for

higher spectrum efficiency and single wavelength solution with sophisticated modulation format.

§ Historically at 2.5G, typ. 32ch: 0.025 b/s/Hz (100 GHz)§ Typ. now at 10G: 0.2 b/s/Hz (50 GHz grid)§ Typ. now at 40G: 0.8 b/s/Hz (50 GHz grid)

§Target for 100G: better spectral efficiency compared to 40G§ ~2 b/s/Hz is achievable (50 GHz grid)

Status:§ Substantial market interest for 100G§ Alcatel-Lucent Technology leadership including standards development

*Reminder: today’s typical link

capacity is ~1 Tbit/s (100x10G)


Drivers





n System automation

System scalability



Wavelength Tracker™

Encode/Decode Points

= Wavelength Tracker Detection PointTransponder

= Wavelength Tracker Insertion Point

Filter (East)

A

THRUWDM IN

AMP IN

AMP OUT(Optional)

Filter (West)

AWDM IN

Transponder

AMP OUT(Optional)

AMP IN

ADD/DROP

v Each channel is encoded with a unique WaveKey pair that allows the channel to be identified and its power monitored.

v WaveKeys are encoded onto the channel at each Transponder and act as “Optical J0” Trace Identifiers.

v The assignment of WaveKeys is managed by the NEs, which maintain a database of the WaveKeys used in the network.

v Wavelength Tracker WaveKeys are detected on the following cards:§ Amplifiers§ Wavelength Routers

v At each detection point, the WaveKeys are detected and their power measured.


Wavelength Tracker™Optical Power Management

ServiceService--aware management of the optical layeraware management of the optical layer

Features:v Wavelength path tracev Fault sectionalization & isolationv Remote optical power controlv Threshold alarmingv Automated fault correlation

Optical Fiber ViewManagement of all wavelength on a

selected fiber

Optical Path ViewManagement of all points along one

wavelength


Integrated Alcatel-Lucent Solution: Greater intelligence, Accelerated deployments

Planning ToolPlanning Tool

Plan Deploy

Manage

n Equipment configuration automatically generatedn User-friendly interface with graphical views of the network

n Current configuration is imported to LPT to support upgrade of existing design

n Validated network design exported to NMS

Network ManagementNetwork Management

n Graphical toplogical viewnEnd to andnService awarness


Conclusion

Zero-Touch Transparent Photonic Networks help service providers to:n Ease operations□Tunable ROADM, to ease commissioning□Flexible nodes, to provision/reconfigure and tune remotely

n Reduce costs□Cost-effective scalable Multi-degree ROADMs enable transparent transits

n Improve network resilience□Photonic restoration□Supporting multiple failures in addition to fast electrical/client protection

n Cap existing, future-proof investments□Photonic switching to support variable grid and channel bandwidth□Future-compatible (40G/100G ready) and backward-compatible

n Ensured operation□Wavelength TrackerTM and graphical end to end management allow fast and

accurate reactions


www.alcatel-lucent.com

AlcaLu Zero Touch Photonics

Documents

Transcript of AlcaLu Zero Touch Photonics