José Alves – Oi

1. Click to edit Master subtitle style
Transport Network
Evolution – 2013
Campinas, May 2013

2. AgendaAgenda
Transport Network Review
Transport Network Keep On Evaluating
o DWDM: Next Steps on the
Network
o Backbone Efficiency
o Unified Control Plane
o Access/Aggregation Efficiency
Conclusions

3. Transport Network Review
Traffic Profile
Layers
Access Backhaul
Aggregation
Backbone
Transport
2G/3G Backhaul
DSLAM Backhaul
Traffic
concentration
Traffic connection
Local
Metropolitan
Nation wide
Service Platform
Traffic Profile
Oi – GTEC – Rights
3
Access
Access Backhaul DSLAM Backhaul
MSAN 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

4. 0
50000000
100000000
150000000
200000000
250000000
Technology Scenario
Profile per layer
Access Backhaul
Aggregation
Backbone
2G/3G/4G MBH
OLT Backhaul
MSAN Backhaul
Traffic
concentration
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
BackboneTransport
2G/3G/4G MBH
OLT Backhaul
MSAN Backhaul
Traffic
concentration
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.
SDH
Packet
MPLS-TP
TDM
OTN
ASON

5. Transport Network Review
Photonic 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
Oi – GTEC – Rights
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
Transport
2G/3G/4G MBH
OLT Backhaul
MSAN Backhaul
Traffic
concentration
Traffic connection
Traffic interest
Local
Metropolitan
Nation wide
Technology
SDH
Packet
MPLS-TP
TDM
OTN
ASON
DWDM
Technology
WASON

6. Transport Network Review
Summary
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
Oi – GTEC – Rights
24
Backbone
efficiency
OTN Switch
+ ROADM
ASON +
WASON
Unified Control Plane allows
max efficiency
Access Backhaul
Aggregation
Backbone
Transport
2G/3G/4G MBH
OLT Backhaul
MSAN Backhaul
Traffic
concentration
Traffic connection
Traffic interest
Local
Metropolitan
Nation wide
Technology
SDH
Packet
MPLS-TP
TDM
OTN
ASON
DWDM
Technology
WASON

7. Transport Network Keep On Evaluating
Summary
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
Novelties
Discussions
Discussions
Oi – GTEC – Rights
24
Backbone
efficiency
OTN Switch
+ ROADM
ASON +
WASON
Unified Control Plane allows
max efficiency
Access Backhaul
Aggregation
Backbone
Transport
2G/3G/4G MBH
OLT Backhaul
MSAN Backhaul
Traffic
concentration
Traffic connection
Traffic interest
Local
Metropolitan
Nation wide
Technology
SDH
Packet
MPLS-TP
TDM
OTN
ASON
DWDM
Technology
WASON
Discussions

8. 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.

9. 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
Transport Network Keep On Evaluating
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
TPD
TPD Next gen coherent transponder

10. DWDM strategy for evolving – time frame
100G coherent systems ready.
ROADM ready for flexible channel spacing (???). Few vendors focused on explore it…
Transport Network Keep On Evaluating
Today Next
Step
Next
Next
Step
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

11. 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.
Transport Network Keep On Evaluating
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?)

12. 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.
Transport Network Keep On Evaluating
Backbone
efficiency
Backbone
efficiency
OTN Switch
+ ROADM
OTN Switch
+ ROADM
ASON +
WASON
ASON +
WASON
Unified Control Plane allows
max efficiency
Unified Control Plane allows
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 (???)
Integrated Control Plane is
mandatory (???)

13. Backbone Efficiency - Discussions
Transport Network Keep On Evaluating
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

14. Backbone Efficiency - Discussions
Transport Network Keep On Evaluating
OTN x Router
The fast protection and electrical
restoration are brought into the routers.
They need to enlarge
2 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

15. Backbone Efficiency – Discussions
Longer distances = less availability.
The nodes placed for availability
improvement should be also routers.
Cost increasing.
Transport Network Keep On Evaluating
Router
OTN
Traffic termination
For availability improvement
Longer distances = Less availability
OTN x Router
5+ x 5

16. Backbone Efficiency – Discussions
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.
Transport Network Keep On Evaluating
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.

17. Backbone Efficiency – Discussions
More than 80% of the service providers intend to deploy OTN Switching network until
2016. Mostly on the core.
Transport Network Keep On Evaluating
OTN x Router
5++ x 5
OTN Switch
+ ROADM
ASON +
WASON
Unified Control Plane allows
max efficiency
Router
+ ROADM
GMPLS +
WASON
Integrated Control Plane is
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.

18. Unified Control Plane – New Trends
SDN – Soft Defined Network
Transport Network Keep On Evaluating
Capacity all
layers
Capacity all
layers
DWDMDWDM 40G/100G40G/100G Coherent improves the
network performance
Coherent improves the
network performanceBackbone
Traffic interestService Platform
ControlPlane
layerslayers
Access
Aggregation
efficiency
Access
Aggregation
efficiency
PTNPTN MPLS-TPMPLS-TP TDM support and OAM tools
are keys
SynchEth and 15588v2
TDM support and OAM tools
are keys
SynchEth and 15588v2
network performancenetwork performance
Backbone
efficiency
Backbone
efficiency
OTN Switch
+ ROADM
OTN Switch
+ ROADM
ASON +
WASON
ASON +
WASON
Unified Control Plane allows
max efficiency
Unified Control Plane allows
max efficiency
Access
Access Backhaul
Aggregation
Backbone
Transport
2G/3G Backhaul
DSLAM Backhaul
MSAN Backhaul
Traffic concentration
Traffic connection
Local
Metropolitan
Nation wide
SDN
ControlPlane

19. Centralized Data
Center
Unified Control Plane – New Trends
SDN – Soft Defined Network
Transport Network Keep On Evaluating
Backbone
Traffic interestService Platform
ControlPlane
DCN
Access
Transport
Access Backhaul
Aggregation
Backbone
2G/3G Backhaul
DSLAM Backhaul
MSAN Backhaul
Traffic concentration
Traffic connection
Local
Metropolitan
Nation wide
SDN
ControlPlane

20. Unified Control Plane – New Trends
SDN – Soft Defined Network
Transport Network Keep On Evaluating
SDN
Control 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
.
C
P
DWDM Switch
OTN Any Device

21. Forwarding
Protection
Unified Control Plane – New Trends
SDN – Soft Defined Network
Typical Transmission Networks already have centralized control
plane – NMS
Transport Network Keep On Evaluating
Forwarding
Protection
Transport Devices Basic Functions
Protection
Static Routing
End to end dynamic
provisioning
Monitoring
Mapping de-mapping
QoS Policing
.
Protection
Dynamic Routing
Static Routing
End to end dynamic
provisioning
Restoration
Monitoring
Mapping de-mapping
QoS Policing
QoS Handling
.

22. Unified Control Plane – New Trends
SDN – Soft Defined Network
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,
Transport Network Keep On Evaluating
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.

23. Access/Aggregation Efficiency – Discussions
SDN (Soft Defined Network) and NFV (Network Functions Virtualization)
impacts.
Transport Network Keep On Evaluating
Capacity all
layers
Capacity all
layers
DWDMDWDM 40G/100G40G/100G Coherent improves the
network performance
Coherent improves the
network performancelayerslayers
Access
Aggregation
efficiency
Access
Aggregation
efficiency
PTNPTN MPLS-TPMPLS-TP TDM support and OAM tools
are keys
SynchEth and 15588v2
TDM support and OAM tools
are keys
SynchEth and 15588v2
network performancenetwork performance
Backbone
efficiency
Backbone
efficiency
OTN Switch
+ ROADM
OTN Switch
+ ROADM
ASON +
WASON
ASON +
WASON
Unified Control Plane allows
max efficiency
Unified Control Plane allows
max efficiency

24. Access/Aggregation Efficiency – Discussions
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.
Transport Network Keep On Evaluating
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
NFV Structure
DPI
CDN
Firewall
NAT
BRAS
EPC
Software
Servers
Switches

25. Access/Aggregation Efficiency – Discussions
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.
Transport Network Keep On Evaluating
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
Transport
Devices
NFV Structure
DPI
CDN
Firewall
NAT
BRAS
EPC
Software
Servers
Switches

26. Access/Aggregation Efficiency – Discussions
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.
Transport Network Keep On Evaluating
Ok for the evolving
Capacity all
layers
Capacity all
layers
DWDMDWDM 40G/100G40G/100G
Access
Aggregation
efficiency
Access
Aggregation
efficiency
PTNPTN MPLS-TPMPLS-TP TDM support and OAM tools
are keys
SynchEth and 15588v2
TDM support and OAM tools
are keys
SynchEth and 15588v2
Coherent improves the
network performance
Coherent improves the
network performance
Backbone
efficiency
Backbone
efficiency
OTN Switch
+ ROADM
OTN Switch
+ ROADM
ASON +
WASON
ASON +
WASON
Unified Control Plane allows
max efficiency
Unified Control Plane allows
max efficiency
Ok for the evolving
trends of SDN and
NFV

27. 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.
Transport Network Keep On Evaluating
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??

28. Transport Network
Thank you!Thank you!
José Alves dos Santos Junior
Oi Telemar - Brazil
+55 21 3131 7773
jalves@oi.net.br
José Alves dos Santos Junior
Oi Telemar - Brazil
+55 21 3131 7773
jalves@oi.net.br