Zukünftige Netztechnologien - DFN · Zukünftige Netztechnologien 1. ... 6 ©Nokia Siemens Networks Presentation / Author / Date Soc Classification level WDM/ OTN Ethernet NG-SDH

1 © Nokia Siemens Networks Presentation / Author / Date

I insert classification level

Zukünftige Netztechnologien1. DFN-Forum KommunikationstechnikKaiserslautern, 28.05.2008

Andreas Kirstädter, Thomas MichaelisNokia Siemens NetworksResearch, Technology & Platforms – Network Technology


Soc Classification level

Acknowledgements

• Claus Gruber

• Harald Rohde

• Bernhard Spinnler

• ITG-Fachgruppe 5.3.3



WARNING: This is on predicting the future …(RAND Corp. , 1954)



Outline

• Motivation

– Drivers for new networking technologies in core & metro NWs

• How can new networking technologies be of service?

– Minimize cost of investment (CAPEX)

– Minimize cost of operation (OPEX)

– Enable novel & differentiated services

• CELTIC project 100GET-E3

• Conclusion



Outline

• Motivation


▪ Network convergence

▪ Exponential traffic growth + flat revenues

▪ Higher margins






• Conclusion



WDM/

OTN

Ethernet

NG-SDH

Integration of

Ethernet functionality

IP

ATM

Carrier Ethernet

Transport

Ethernet

Mobile

Backhaul

L2 Core

Metro DWDM

DWDM

with L2-ADM

timeMigration Areas

Carrier Ethernet

Motivation –Drivers for new networking technologies in core & metro NWs

• Network convergence

• Multiple NW infrastructures

• Collapsed switching platform for all legacy & novel services desirable

• Note: ~90% of all traffic is Ethernet-framed




• Exponential traffic growth

• 40-100% CAGR

• Evolution of (residential) access bandwidth

• Web 2.0 („participatory web”) -Multitude of end user-driven applications

~100%

2000-2007 Euro-IX IXPs peering traffic

• Flat revenues

• 5-6% CAGR (Source: Reuters)

��Decline in average revenue per user (ARPU)

�� IP/MPLS-based NW extension termed too expensive by many carriers




• Higher margins

• VPN services

• More than just best-effort connectivity

• Dynamic services

• Reducing service delivery time

• QoS-guaranteed services across administrative domains

• Not supported by current packet-based networking technologies

Source:

•Infonetics press releases

•ADVA Optical: “Q1 2007 Financial

Results (Ethernet Revenues 2005-

2010)”



Outline

• Motivation




▪ Leverage economies of scale effects

• NG-PONs featuring long reach & high splitting factor

• Spectrally efficient & high-capacity DWDM channels

• Coordinated routing, resilience & planning across technology layers

• High-volume production

• Integrating network elements of different technology layers („Terabit access node“)

▪ Leverage traffic statistics

• Packet aggregation / multiplexing into physical channels

▪ Standardisation



• Conclusion



Minimize cost of investment (CAPEX)

• Leverage economies of scale effects– NG-PONs featuring long reach & high splitting factor

▪ Cost of L1 access infrastructure divided by more users (e.g. PIEMAN project)

▪ Collapse of metro and access

Today:

AccessAggregation

Eliminating 1st/2nd

aggregation switches

Serve more users from fewer locations

Metro/Core

FTTx

with NG-PON:TAN

Metro

FTTx




• Leverage economies of scale effects– Spectrally efficient & high-capacity DWDM channels

▪ Cost of L1 core infrastructure (fibers, optical amplifiers, dispersion compensators, ...) divided by more connections

▪ Leveling of capacity demand in absence of a TDM hierarchy – a.k.a. economies-of-scale gain („Bündelungsgewinn“)

90

degree

hybrid

PBS

90

degree

hybrid

Pol X

Pol Y

IX

QX

IY

QY

Integrated Optics

ADC

ADC

ADC

ADC

Digital Postprocessing

VCO

DQPSK

precoder

DQPSK

precoder

Pol X

Pol Y

IX

QX

IY

QY

pi/2

pi/2

CP-QPSK




• Perform multi-layer optimisation (MLO)

– Coordinated routing, resilience & planning across technology layers

▪ Switch at coarsest granularity - the coarser the granularity, the more cost-efficient the switching

▪ Eliminating capacity redundancies (e.g. protection on multiple layers)

▪ Minimising begin-of-life (BOL) or end-of-life (EOL) cost – tradeoff!

47,340 37,363 31,580

1,341,000

637,500 589,500

79,500

79,50087,600

0

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

opaque transparent optimiert

Router

LC interPoP

OTN

WDM & OXC

-48%

-6%

Total Network costs dominated by IP

Significantly reduction by shifting traffic from the IP to the Ethernet platform

IP over WDM

Opaque, Transparent, Optimized

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000

800,000

2010-A 2010-B 2010-C

SDH - LIC

SDH - Switch

IP - LIC

IP - Router

E - LIC

E - Switch

OTN

WDM

-17%

-24%

IP over Ethernet/SDH over WDM

Optimized

Fully transparent network design cuts network cost by half

Multilayer optimized routing and grooming further reduction by 6%



Minimize cost of investment (CAPEX) – Other means

• Leverage economies of scale effects

– High-volume production

▪ Cost of investment shared with many other product instances, markets & industries

▪ Often preceded by standardisation

– Integrating network elements of different technology layers („Terabit access node“)

▪ Cost of shelf / rack, power supply, cooling, footprint / lease etc. divided by mutiple technology layers

▪ Also: eliminating short-range optics

• Leverage traffic statistics

– Packet aggregation / multiplexing into physical channels

▪ Leveling of capacity demand due to packet multiplexing – a.k.a. statistical multiplexing gain („Multiplexgewinn“)

• Standardisation

– Ensures real competition and comparability in price, given broadly accepted specs / requirements, e.g.

▪ IEEE 802.3ba – Small set of optical IEEE interface solutions covering as many applications as technically &

economically feasible

▪ Advanced TCA – Rack, shelf, backplane mechanical specs etc.



Outline

• Motivation





▪ Reduce power consumption („green networks“)

▪ Simplify, coordinate & automate operational processes

• Simplify equipment configuration

• Coordinate & automate NW management

• Coordinate & automate provisioning (GMPLS, PCE)



• Conclusion



Minimize cost of operation (OPEX)

• Reduce power consumption („green networks“)

– Switch at coarsest granularity

▪ The coarser the switching granularity, the more power-efficient the switching

– Other means

▪ Reduce line speed during off-peak times (IEEE 802.3az - Energy-efficient Ethernet)

▪ Network virtualisation, traffic engineering - Upon marginal load, redistribute traffic and send network elements to sleep

▪ Investigate mixed-signal processing

Source: internal analysis

Power consumption (in kW) for 100Gig

Router

1

Switch

0.5

SDH

0.2 ROADM

0.04

Power consumption (in kW) for 100Gig

Router

0.6

Switch

0.2 ROADM

0.01

Future




• Simplify, coordinate & automate operational

processes

– Coordinate & automate provisioning

▪ Across multiple technology layers and

administrative domains (GMPLS, PCE)

RSVP-TE

OSPF-TE

TEDatabase

LSPDatabase

1. LSAs 1. LSAs

2. PATH 5. PATH

3. L

oo

ku

p

4. R

ou

te

8. RESV 6. RESV

7. C

ross-

con

ne

ct

RSVP-TE

PCEP

LSPDatabase

2. PATH 5. PATH

3. L

oo

ku

p

4. R

ou

te

8. RESV 6. RESV

7. C

ross-

con

ne

ctOSPF-TE

TEDatabase

1. LSAs 1. LSAs

PCEP

Constraint

BasedRouting

PathComputation

Element(PCE)

PathComputation

Client(PCC)

GMPLS

Cro

ss-con

ne

ct

NMS

EMS

Management

Plane

Data / TransportPlane

ControlPlane

PCE

GMPLS + PCC




Cro

ss-con

ne

ct

NMS

EMS

ManagementPlane


NMS-based provisioning




Cro

ss-con

ne

ct

NMS

EMS

ManagementPlane


Control

Plane GMPLS GMPLS GMPLSGMPLSGMPLS

GMPLS-based provisioninguser-triggered




EMS

ManagementPlane


Control

Plane GMPLS GMPLS GMPLSGMPLSGMPLS

GMPLS-based provisioning

NMS

NMS-triggered

Cro

ss-con

ne

ct




Cro

ss-con

ne

ct

NMS

EMS

ManagementPlane


Control

Plane

GMPLS / PCE-based provisioningPCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

NMS-triggered




NMS

EMS

ManagementPlane

Data / Transport

Plane

Control

Plane

Cro

ss-con

ne

ct

PCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCCC

ross-co

nn

ect

PCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

Multi-Domain Provisioning




NMS

EMS

ManagementPlane

Data / Transport

Plane

Control

Plane

Cro

ss-con

ne

ct

PCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCCC

ross-co

nn

ect

PCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

Multi-Domain & Multi-Layer Provisioning

Cro

ss-con

ne

ct

PCE

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

GMPLS

+PCC

Cro

ss-con

ne

ct

PCE

GMPLS+PCC

GMPLS+PCC

GMPLS+PCC

GMPLS+PCC

GMPLS+PCC



Outline

• Motivation






▪ Carrier Ethernet attributes

▪ End-to-end service guarantees


• Conclusion



Enable novel & differentiated services

• Carrier Ethernet Attributes

– Compared to enterprise networks

carriers have different requirements

– Benchmark are traditional leased-line

services

• Scalability

• Standardized Services

• Service Management

• Quality of Service

• Reliability

Carrier Ethernet Attributes

Source: Metro Ethernet Forum, Sept. 2006



Outline

• Motivation







– Objective

– Internal & external collaboration

• Conclusion



POTS / ISDN

xDSL

Ethernet

PON

RAN

3G

...LTE

Metro Core

Access

CELTIC project 100GET-E3 – Objective

CWDM DWDM

Transport

WDM

ATDM

Ethernet Ethernet

ATM /IP Edge & Core

IPTV

VoIP

VPN

ISP

Services / Applications

100GET-E3

Ethernet



CELTIC project 100GET-E3 – Internal & external collaboration

• Networking activities

Internal partners• RTP NT NW research• IPT RD NW research• OBS Multi-layer NW management

Subcontractors• Siemens CT IC2 Multi-layer NW architecture

• TU Dresden – TK Capacity and migration planning

• LRZ Munich Intra-/inter-domain NW management

• U Munich – CDTM Profitability and strategic implications of NGN networks

Partners• TU Munich – LKN Fail-safe network element

configuration / operation• TU Munich – LIS 100Gb/s-scalable NPU

architecture• U Würzburg Multi-layer routing /

resilience• TU Brunswick Inter-domain provisioning

• Physical layer activities

Internal partners• IPT DWDM PHY research

Subcontractors• TU Munich – LNT Design of incoherent

transmission systems• FhG-HHI Berlin Design of coherent

transmission systems• U Kiel Coherent receiver – clock / carrier

recovery• TU Berlin Transmission impairments

(PMD, Kerr); OFDM transmission

• U Bw Munich Polarisation demux, cross-polarisation interference cancellation

Partners• CoreOptics Nur. Transmitter/receiver

subsystems• IHP Frankfurt/Od. Coherent receiver – digital signal

processing• TU Dresden – HFT Adaptive dispersion

compensator



Conclusion

• In the past ...

– ... a single networking technology (WDM) enabled an enormous

bandwidth growth at relatively low cost

• In future ...

– ... network engineers need to investigate multiple networking

technologies simultaneously to achieve comparable bandwidth gain at

affordable cost

▪ Network engineering (PON, DWDM, „green networks“)

▪ Network planning (MLO)

▪ Network operation (GMPLS, PCE)

▪ ... and many more!

▪ ... and more to come!

Documents

Zukünftige Netztechnologien - DFN · Zukünftige Netztechnologien 1. ... 6 ©Nokia Siemens Networks Presentation / Author / Date Soc Classification level WDM/ OTN Ethernet NG-SDH