© 2009 Verizon. All Rights Reserved. PTEXXXXX XX/09

Thomas SimsTransmission Design EngineeringVerizon BusinessMarch 30th 2010

Packet Optical TransmissionExamining Verizon’s Transition to a PacketOptical Infrastructure

2

Agenda: Verizon Packet Optical Transmission

• Verizon’s Global Capability - 1 slideIntroduction to Verizon’s network reach and capability

•Carrier Networks & Convergence - 2 slidesTypical Carrier network & Convergence of layers

• Signal and Protocol Mapping - 2 slidesAnalysing the protocols in the network

• Packet Optical Transmission - 3 slidesSummary of Packet Optical Transmission

• Automation and Core Router design – 2 slidesSome drivers & application of POTP

• P-OTP Deployment Strategy – 2 slidesTarget implementation of system and network

•Conclusion – 2 slidesConclusions & Questions

Verizon’s Global Network Capabilities & Operations

• 750K+ Fibre Route Kilometres & 80+ Submarine Cable Systems• 40,000+ miles of ULH network in U.S./Asia/Europe• 200+ Data Centres,• 10,000+ On-net buildings globally• 5 Major Global Network Operating Centres• 4,000+ Managed Customer Networks

Most Connected Global IP NetworkMost Connected Global IP Network

150+ Countries2,700+ Cities33,000 Employees

Carrier Network Architecture - Multi Vendor/ServiceNetwork

LH

LH

LH

LH

LongHaul

GbE

SDH

IP/MPLS

SDH

FC/GbE

L2 Ethernet

Long Haul WDM

WDM

STM-n

SDI

StackedADMs

Back-to-backADMs

Inefficient ring-basedprotection and grooming,with limited survivability

Back-to-backmuxponders. No

end-to-end service-level performance

monitoring

Manualgrooming

Partially filled,service-specific anddestination-specific

wavelengths

Costly and resourceinefficient 1+1

protection; limitedsurvivability

MSPPPDH

10/100

Separate nodes forSONET/SDH and virtual

wavelength servicesSeparate set ofwavelengths foreach service type

from each end office

Separate nodes forSONET/SDH and virtual

wavelength services

Metro

Network Convergence

IP

Ethernet(ATM/FR)

SDH

DWDM

• IP-MPLS-Ethernet for applications– Data Services

• Ethernet for packet transport– Efficient packet transport– Low cost interfaces

• Packet Optical Transport– Fused Ethernet-WDM-ROADM– Connection-oriented Ethernet transport

tunnels

• Fewer layers, Ethernet begins todisplace SDH over time

Source: Infonetics Research2010 2011 2012+

Metro Service Mapping

Low Speed/Legacy

E1

E3

STM-1

STM-4

STM-16

STM-64

OTU0OTU1

OTU2

OTU3

10M

100M

1G

10G

100G

ESCON

FICON 2GFICON 1G

FICON 4GFICON 2G

1G FC2G FC4G FC8G FC

SD-SDI, ASI

HD-SDI3G-SDI

Rate

10 GE40 GE

Eth

FE

GE

SAN ApplicationsEnterprise/Business

Video protocolsBackboneTDM Transport

Signal Mapping – SDH, OTN, MPLS-TP?

E1

E3

STM-1

STM-4

STM-16

STM-64

STM-256

OTU0OTU1

OTU2

OTU3OTU4

10M

100M

1G

10G

100G

ESCON

FICON 2GFICON 1G

FICON 4GFICON 2G

1G FC2G FC4G FC8G FC

SD-SDI, ASI

HD-SDI3G-SDI

Rate

Eth

FE

GE

10 GE

MPLS-TP

OTN MPLS-TP or OTN?

40 GE

SDH

Protocol Transport Driver

WavelengthServices

PacketServices

TDMServices

ODU-1, ODU-2, ODU-3, ODU-4E-1

• Packet services are growing rapidlyand will no doubt dominate futuretraffic demands

•Wavelength services are growingas well and OTN is the only viablemethod available for core transport

•Growth in TDM services may beslowing, but demand is still strong

• Protocol conversion is not asefficient as native transport andswitching

100G

10G

1G

100M

10M

64K

E3STM-n

Technology Evolution

WDM

VC-4 & ODU-nSwitching

Packet

Ethernet & MPLSSwitching

GFP & VCAT

P-OTP

WavelengthSwitching

TDM-on-a-Wavelength

Packet OverWavelength

TDM

Triple Play of Transmission TechnologyTriple Play of Transmission Technology

Packet- OpticalTransport Platform

Packet Optical Transmission Platform

P-OTP

WDM

NG-ADM plus DWDM

I/O I/O…

WSS ROADM

OTP

I/O I/O

WSS ROADM

NG-ADM

NG-ADM

NG-ADM

NG-ADM+

NG-ADM+

NG-ADM+

NG-ADM+

NG-ADM+

NG-ADM+

NG-ADM+

NG-ADM+

• Evolutionary path from discrete network elements to a fully integrated platform• Wavelength Selectable Switch (WSS) provides multi-degree optical switching• Hybrid electrical switch fabric provides both TDM and Packet aggregation

TDM

TDM

Packet

TDM

Packet

PoS

TDM

HybridFabric

VCAT

PacketPacket

Transport Network Automation

OTN Control Plane

City A City BNational Network

• Enables new services such as Bandwidth on Demand, client self service, etc.•Reduces back office system development for the carrier•Network becomes the database of record

Core Router Connectivity

Router Router

P-OTP Architecture: Core RouterConnectivity via Transport MPLS

Current Architecture:Core Router Direct Connectivity

• Physical mesh connectivity is desired toreduce transit traffic•Router port and transport utilization islimited due to granularity•Reconfiguration flexibility is limited dueto granularity, speed, and control planeinteroperability

TransitTraffic

RouterConnectivity

• Fewer router ports required toachieve full mesh connectivity• Packet level granularity providesmaximum utilization•Higher speed ports between layersw/o channelization providesmaximum flexibility

P-OTP Target Architecture

2x40G λ

100GbE λ

2x40GbE λ

100GbE λ

100G λ

2x40G λ

Client I/O

WSS ROADM

OTN

OTN

Packet

OTN

Packet

OTN

PacketSwitching

Inter-worki

ng

Packet

WSS ROADMWSS

ROADMWSS ROADMWSS

ROADMWSS ROADM

DWDM I/O

100G λ

OTN

OTN

OTN

Packet

OTN

OTN

Option for wavelengths to bypass fabric fortransponder and regeneration applications

Packet

Packet

100GbE

2x40G

WSS ROADMWSS

ROADM

Support 8+ DWDM degreeswith 80+ wavelengths eachemploying colorless anddirectionless ROADMs

2x40GbE

10x10GbE

Separate OTN and packet modules

Module types with both client andDWDM optics connected to thehybrid fabric

Packet processing is provided inI/O modules

10x10G

2x40G

OTN Switching

10x10G

Multi-TerabitHybrid Fabric

100G λOTNOTN

100G λ

100G λ

Summary Target Network Architecture

Core

Ethernet

SDH

OTN

Porttypes

BroadbandWeb, IMSVoIPIP-VPNFR/ATM

POTS, BRI/PRIT1/E1, T3/E3

GbE/10GbEASI, SD/HD-SDIFC/Ficon, EsconSTM/OTU-n

Services

IPFR/ATMEthernet

MPLS

PDHSDH

OTN

Serv

ice M

ap

pin

g

Ethernet VPN

Serv

ice H

an

dli

ng

Bandwidthmanagement

AccessEdge

Metro

Packet Optical Transport

Reliable, flexiblebandwidth mgmt

(Ethernet, MPLS, SDH,OTN)

Optical and Ethernet service mgmt

OTN / λ OTN / λ

P-OTP

P-OTPP-OTP P-OTP

Conclusion

•Service mapping and protocol requirements are becoming morevaried and complicated•Transmission systems should support:

–Packet services natively–Optical Wavelength services–SDH services

Verizon’s strategy is to deploy a PacketOptical Transmission Platform that supportsall Services on one system.

Questions?