Optical network evolution

Click to edit Master subtitle style

Transport Network Evolution – 2013

Campinas, May 2013

AgendaAgendaTransport Network ReviewTransport Network Keep On Evaluating

o DWDM: Next Steps on the Network

o Backbone Efficiencyo Unified Control Planeo Access/Aggregation Efficiency

Conclusions

Transport Network ReviewTraffic Profile

� Layers

Access Backhaul

Aggregation

Backbone

Tran

spor

t

2G/3G BackhaulDSLAM Backhaul

Traffic concentration

Traffic connection

Local

Metropolitan

Nation wide

Service Platform

Traffic Profile

Oi – GTEC – Rights

3

Access

Access Backhaul DSLAM BackhaulMSAN Backhaul

Local

Service

� Each layer takes care of the its traffic properly

� Lower deployment cost

� Suitable protection strategy per layer

� Optimize the bandwidth usage

� Gradual features introduction

5

� Share, trends and impacts.

� Packet traffic is majority.

� The higher rates introduced right from the access.� LTE

� HSI

� IPTV

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

2008 2009 2010 2011 2012 2013 2014 2015 2016

TDM

Packet

Today

0

50000000

100000000

150000000

200000000

250000000

Technology Scenario

� Profile per layer

Access Backhaul

Aggregation

Backbone

2G/3G/4G MBHOLT BackhaulMSAN Backhaul


Traffic connection

Statistical gains

opportunity

40000000

60000000

80000000

100000000

TDM

Transport Network Review

Technology Disruption

12

0

20000000

40000000

PACKET

Oi – GTEC – Rights 18

Access Backhaul

Aggregation

BackboneTr

ansp

ort



Traffic connection

Traffic interest

Local

Metropolitan

Nation wide

Technology

� Solution basis

� ASON on top of OTN as a toll for provisioning, resources

optimization and availability improvement taking in account meshed

networks combined to a restoration schemes with shared structures.

SD

HP

acke

tM

PL

S-T

P

TD

MO

TN

AS

ON

Transport Network ReviewPhotonic Evolution

� DWDM Coherent detection + DSP started a revolution in the DWDM

industry:� Eliminated the sensivity to the most significant impairment for high speed transmission over

fiber. Chromatic Dispersion.

� Eliminated the sensivity to PMD. Old fibers life extended.

� Performance for 40 and 100G channels similar to 10G.

� Even gains in performance can be achieved when eliminating DCF. Latency improvements.

� The carrier fits into the ITU-T 50GHz grid.

� Absolute Mbit/s cost reduction.

Photonic Evolution


20

DWDMSDH

155M 622M 2.5G 10G 40G 100G

Mbps Cost

23

� ROADM + WASON is suitable for network flexibility (provisioning)

� WASON and ASON (OTN) under the same control plane allow

enhanced availability with lower costs

Access Backhaul

Aggregation

Backbone

Tran

spor

t



Traffic connection

Traffic interest

Local

Metropolitan

Nation wide

Technology

SD

HP

acke

tM

PL

S-T

P

TD

MO

TN

AS

ON

DW

DM

Technology

WA

SO

N

Transport Network ReviewSummary

Capacity all

layers

DWDM 40G/100G

Access

Aggregation

efficiency

PTN MPLS-TP TDM support and OAM tools

are keys

SynchEth and 15588v2

Coherent improves the

network performance

Backbone OTN Switch ASON + Unified Control Plane allows


24

Backbone

efficiency

OTN Switch

+ ROADM

ASON +

WASON

Unified Control Plane allows

max efficiency

Access Backhaul

Aggregation

Backbone

Tran

spor

t



Traffic connection

Traffic interest

Local

Metropolitan

Nation wide

Technology

SD

HP

acke

tM

PL

S-T

P

TDM

OT

N

AS

ON

DW

DM

Technology

WA

SO

N

Transport Network Keep On EvaluatingSummary

Capacity all

layers

DWDM 40G/100G

Access

Aggregation

efficiency

PTN MPLS-TP TDM support and OAM tools

are keys



network performance

Backbone OTN Switch ASON + Unified Control Plane allows

Novelties

Discussions

Discussions


24

Backbone

efficiency

OTN Switch

+ ROADM

ASON +

WASON


max efficiency

Access Backhaul

Aggregation

Backbone

Tran

spor

t



Traffic connection

Traffic interest

Local

Metropolitan

Nation wide

Technology

SD

HP

acke

tM

PL

S-T

P

TDM

OT

N

AS

ON

DW

DM

Technology

WA

SO

N

Discussions

DWDM: Next Steps on the Network - Novelties

� Coherent Detection + DSP on receiver side already rolling out.

� Coming up DSP on the transmitter side allowing:

� Over 100G Nyquist DWDM channels. Improved efficiency in bandwidth;

� Dynamic flexible modulation. Dynamic adaptation of the channels capacity based on optical impairments and available spectrum;

Transport Network Keep On Evaluating

spectrum;

� Optical effects pre compensation.

� ROADM with flexible channel spacing.

DWDM strategy for evolving

� Deploy brand new line systems for the coherent channels (100G). Maximize the benefits brought by the coherent technology eliminating the CD compensators and the dual stage OLA. Best performance even over old fibers.

� Introduce the ROADM ready for


ROADM

ROADM

ROADM

ROADM

TPD

� Introduce the ROADM ready for flexible channel spacing. At least the hardware should be ok for the next channeling steps. 12.5G granularity.

� Next gen coherent transponders. Transmitter side DSP enabling super channels and multiple dynamic modulation schemes.

ROADM

ROADM

ROADM

ROADM

ROADM

ROADM

10G DWDM Line System

Coherent DWDM Line System

ROADM

ROADM

50G grid ROADM

Flexible grid ready ROADM

TPD

TPD

TPDTPD Next gen coherent transponder

DWDM strategy for evolving – time frame

� 100G coherent systems ready.

� ROADM ready for flexible channel spacing (???). Few vendors focused on explore it…


Today NextStep

NextNextStep

Protect the fixed grid ROADM investment

10G DWDM Line System

Coherent DWDM Line System

ROADM

ROADM

50G grid ROADM

Flexible grid ready ROADM

ROADM

ROADM

TPD Next gen coherent transponder

TPD

Super Channels Enabled

ROADM ROADM

100G Channels

Shorter term

Longer term

DWDM strategy for evolving – time frame

� Despite the very valuable industry working on developing the over 100G channels, it seems 100G is going to have a longer and healthy life supporting the heavy traffic over the networks.

� Challenges for the super-channels and the flexible dynamic rate adaptation:

� The reaching range for higher bandwidth. Wider networks may not get the advantages of higher modulation formats due to the longer distances.

16QAM < 600km reaching.


16QAM < 600km reaching.

� The coordination with the clients platform when reducing or increasing the bandwidth of a channel. Policing for dropping traffic.

Control Plane integration (G-MPLS? SDN?)

Backbone Efficiency - Discussions

� OTN switching is still the best option combined to the ROADM to provide flexibility and reliability in the network. Fast protection given by the electrical layer and CAPEX savings provided by the OTN Switching + ROADM optical path restoration.


Backbone

efficiency

Backbone

efficiency

OTN Switch

+ ROADM

OTN Switch

+ ROADM

ASON +

WASON

ASON +

WASON


max efficiency


max efficiency

� Another approach proposed skipping the OTN Switching. Fast protection provided by the traffic routers and CAPEX savings by the ROADM optical path restoration.

efficiencyefficiency + ROADM+ ROADM WASONWASON max efficiencymax efficiency

Backbone

efficiency

Backbone

efficiency

Router

+ ROADM

Router

+ ROADM

GMPLS +

WASON

GMPLS +

WASON

Integrated Control Plane is

mandatory (???)


mandatory (???)



OTNOTN

CPCP

ROADMROADM

� The fast protection and electrical restoration are brought into the routers. They need to enlarge

� OTN switch/interfaces are cut off replaced by some few less on the routers

� The transport control plane comes up to the routers

� The sub lambda switching has also to be brought to the routers. They need to enlarge some more



OTN x Router

The fast protection and electrical restoration are brought into the routers.

They need to enlarge2 x 1

The FRR is not that efficient when addressing too high amounts of traffic. The intended SLA may not be reached.

OTN switch/interfaces are cut off replaced by some few less on the routers 1 x 2

The relation between the amount of interfaces must be very well evaluated.The cost of them on each platform is

quite different.

The transport control plane comes up to the routers 1 x 0

GMPLS runs trhough the routers and ROADM.

Not many options of ROADM/Routers integrated.

Multivendor environment issue.

The sub lambda switching has also to be brought to the routers. They need to

enlarge some more 1 x 2

Depending on the bandwidth usage per lambda. Keep in mind the cost difference

between the options.

5 x 5

Backbone Efficiency – Discussions

� Longer distances = less availability.

� The nodes placed for availability improvement should be also routers.

� Cost increasing.


Router

OTN

Traffic termination

For availability improvement

Longer distances = Less availability

OTN x Router

5+ x 5


� Legacy interfaces/services. How to address them?

� Routers don’t address efficiently SDH TDM interfaces.

� To keep the SDH based transport network in parallel become too costly.


OTN x Router

5++ x 5

parallel become too costly.

Fact

� The legacy is always a big issue for the operators/service providers.

� Provide a seamless optimized in cost solution to address the future and the present has a enormous value.


� More than 80% of the service providers intend to deploy OTN Switching network until 2016. Mostly on the core.


OTN x Router

5++ x 5

OTN Switch

+ ROADM

ASON +

WASON


max efficiency

Router

+ ROADM

GMPLS +

WASON


mandatory (???)

2016. Mostly on the core.

� The OTN Switching integrated to DWDM/ROADM system is a major requirement up to 2016.

Operators/Service Providers

� The OTN advantages are clear for wider area networks with longer links.

� Router solution makes sense for about 20% of the service providers.

� Everyone should make his own evaluation based on his environment/scenarios.

Unified Control Plane – New Trends

� SDN – Soft Defined Network


Capacity all

layers

Capacity all

layers

DWDMDWDM 40G/100G40G/100G Coherent improves the

network performance


network performanceBackbone

Traffic interestService Platform

Co

ntr

ol

Pla

nelayerslayers

Access

Aggregation

efficiency

Access

Aggregation

efficiency

PTNPTN MPLS-TPMPLS-TP TDM support and OAM tools

are keys


TDM support and OAM tools

are keys


network performancenetwork performance

Backbone

efficiency

Backbone

efficiency

OTN Switch

+ ROADM

OTN Switch

+ ROADM

ASON +

WASON

ASON +

WASON


max efficiency


max efficiencyAccess

Access Backhaul

Aggregation

Backbone

Tra

nsp

ort

2G/3G Backhaul

DSLAM Backhaul

MSAN Backhaul


Traffic connection

Local

Metropolitan

Nation wide

SD

NC

on

tro

l P

lan

e

Centralized Data Center




Backbone

Traffic interestService Platform

Co

ntr

ol

Pla

ne

DCN

Access

Tra

nsp

ort

Access Backhaul

Aggregation

Backbone

2G/3G Backhaul

DSLAM Backhaul

MSAN Backhaul


Traffic connection

Local

Metropolitan

Nation wide

SD

NC

on

tro

l P

lan

e




SDNControl Plane

� Forwarding

� Protection

SDN API

SDN CONTROL LAYER

DCN

Transport

� Protection

� Dynamic Routing

� Static Routing

� End to end dynamic provisioning

� Restoration

� Monitoring

� Mapping de-mapping

� QoS Policing

� QoS Handling

.

CP

DWDM Switch

OTN Any Device

� Forwarding

� Protection



� Typical Transmission Networks already have centralized control plane – NMS


� Forwarding

� Protection

Transport Devices Basic Functions

� Protection

� Static Routing

End to end dynamic provisioning

� Monitoring


� QoS Policing

.

� Protection

� Dynamic Routing

� Static Routing

� End to end dynamic provisioning

� Restoration

� Monitoring


� QoS Policing

� QoS Handling

.



� Despite the many challenges to be faced by SDN, it comes with a good rational and appeal for cost reduction on both OPEX and CAPEX.

� The network elements trend to be much simpler and focused on lower OSI layers: Lower CAPEX.

� The software APIs come to simplify the job for service delivering,


� The software APIs come to simplify the job for service delivering, speeding it up and automatizing steps: Lower OPEX.

� GMPLS can be a useful tool for the SDN approach in certain phases/scenarios. Anyway the GMPLS health is getting weak.

� GMPLS is still a requirement for the transport network platforms.

� SDN approach is becoming also a requirement, at least as a roadmap.

Access/Aggregation Efficiency – Discussions

� SDN (Soft Defined Network) and NFV (Network Functions Virtualization) impacts.


Capacity all

layers

Capacity all

layers

DWDMDWDM 40G/100G40G/100G Coherent improves the

network performance


network performancelayerslayers

Access

Aggregation

efficiency

Access

Aggregation

efficiency


are keys



are keys


network performancenetwork performance

Backbone

efficiency

Backbone

efficiency

OTN Switch

+ ROADM

OTN Switch

+ ROADM

ASON +

WASON

ASON +

WASON


max efficiency


max efficiency


� NFV (Network Functions Virtualization)

� Many of functions performed by dedicated appliances are brought into servers as virtual functions.

� These appliances are mostly based on Routers.

� Only the transport function is left spread in the network.


TransportDevices

Transport Devices

Transport Devices

Transport Devices

Transport Devices

Transport Devices

NFV Structure

DPICDN

Firewall

NAT

BRAS

EPC

Software

Servers

Switches


� NFV (Network Functions Virtualization)

� Brings a quite big potential for cost reduction in the networks.

� The advanced requirements/protocols for transport devices are even fewer.


TransportDevices

Transport Devices

Transport Devices

Transport Devices

Transport Devices

Transport Devices

NFV Structure

DPI

CDN

Firewall

NATBRAS

EPC

Software

Servers

Switches


� SDN + NFV as trends rising up in the market empower the approach of simpler and lower layer technology for the access and aggregation layers of the network.

� The MPLS-TP based devices with static routing are leveraged as one of the best options to support the transport in SDN and/or NFV approach.


Ok for the evolving

Capacity all

layers

Capacity all

layers

DWDMDWDM 40G/100G40G/100G

Access

Aggregation

efficiency

Access

Aggregation

efficiency


are keys



are keys



network performance


network performance

Backbone

efficiency

Backbone

efficiency

OTN Switch

+ ROADM

OTN Switch

+ ROADM

ASON +

WASON

ASON +

WASON


max efficiency


max efficiency

Ok for the evolving trends of SDN and NFV

Conclusions

� OTN Switching has been consolidated as the technology option for the backbone layer for best efficiency combined to the DWDM ROADM. Control plane integration to the ROADM is becoming a mandatory requirement.

� SDN is raising up in the market as the unified and centralized multilayer control plane option. Within the SDN time for evolving and consolidation GMPLS continues as a mandatory requirement.


GMPLS continues as a mandatory requirement.

� The approach of simplified equipment/protocols deployed along the transport network has been empowered by the SDN and/or NFV. The more complex functions trend to be centralized and even virtualized.

� Is time to start the proof of concept of SDN and NFV in order to start shaping the network for the future. Will they be the new disruption in the Operator/Service Provider networks??

Transport Network

Thank you!Thank you!José Alves dos Santos JuniorOi Telemar - Brazil+55 21 3131 [email protected]

José Alves dos Santos JuniorOi Telemar - Brazil+55 21 3131 [email protected]

Date post:	09-Jun-2015
Category:	Technology
Upload:	cpqd
View:	994 times
Download:	1 times