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Planning Next Generation Networks
Robert Conger
AVP, Carrier Strategy
© 2015 ADTRAN, Inc. All rights reserved.
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Drivers for Change in Our Industry
Connect
America Fund
Political &
Regulatory
Environment
Application &
Technology
Demands
DOCSIS 3.1
Competitive
Environment
Pace of Change in
Broadband
Networks
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Shift to the Cloud
Applications and
Content
The
Cloud
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What is Needed:
High Bandwidth, Low
Latency Cloud
Access
Subscribers and
Devices
Cloud Access
3
Cloud Access Architecture
Service
Orchestration
Virtual Functions
The
Cloud
Metro Transport
(Nx10/100G)
Access
Fiber hub sites
Content
Metro Transport
Nx10G  Nx100G
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Broadband Access
G.Fast, Vectored VDSL2, GPON,
GE/10GE, NGPON, DOCSIS 3.x
4
Cloud Pushing Closer to the Edge
FTTB/
FTTdp
The
Cloud
Metro Transport
(Nx10/100G)
Fiber Access
vCPE
(GPON, NGPON2, P2P
10G, etc.)
vCPE
Distributed metro data centers:
– Cloud pushing closer to the customer as distributed caching
systems pushed closer to the edge (e.g., Netflix caching)
– 85% of all traffic is projected to stay within the metro
– Cloud-based applications emerging to consume higher
bandwidth (e.g., 4K HDTV, 4K HD gaming, biz services, etc.)
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More Than Video
Wearables, 3D Manufacturing,
Nanotechnology, Robotics, The Internet of
Everything, Genomics, Artificial Intelligence
Building Agile, Scalable Networks
Shift to Data Center Architectures
Highbandwidth,
cloud-centric
apps
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Need for
agile, userdriven
networks
Transition to
data center
architectures
12
Applying Data Center Architectures
 Programmable networks
–
–
–
–
User-driven networks
E2E automation
On-demand service activation
Flexible, app-driven network
 Distributed computing
– Flexible distribution of resources
– Elastic resource allocation
 Efficient cloud access
– Scalable, low-latency access to the cloud
– Pay-as-you-grow access options
 Intelligent networks
– Real-time analytics
– Self-healing
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Next Gen Network Architecture
Service Orchestration
and Control
Automation
Portals
VNFs
Analytics
Topology
VNFs
vBNG
vCPE
Distributed
Compute
Node
VNFs
CPE
Metro Regional
Metro Edge
(Nx100G)
(Nx10/100G)
Hyperscale
Data Center
CPE
CPE
Distributed computing enables efficient allocation
of cloud resources
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Cloud Partnerships
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Network Automation
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The Role of SDN & NFV
 What do service providers want?
–
–
–
–
Service agility
User-enabled services
Intelligent networks
Lower opex and capex
 How do operators get what they want?
– Transition to open, software-centric networks
– Real-time network programmability
 Key technology enablers
– Software defined networking (SDN) for end-to-end network
programmability and optimization of networking devices
– Network functions virtualization (NFV) to hardware-centric
functions into software that can run on general compute
infrastructure
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SDN Architecture
Source: ONF
SDN built on the principle of separation of control and data planes to
allow for simplified, centralized management of highly-optimized
infrastructure devices
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Early Core Routing Networks
IP Forwarding: All network elements exchange routing
information across the data plane via dynamic routing
protocols (RIP, OSPF, BGP, IS-IS, etc) and make
forwarding decisions on a per-hop basis.
Routing
Protocols
Early Days of Core IP Networks
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Transition to MPLS Switching
MPLS Switching: IP lookups performed at the edge, switching
in the core. Introduced optional control and data plane
separation, but control plane still used mix of dynamic protocols
(LDP, I-BGP, OSPF-TE, etc).
LER
LER
LSR
Transition to MPLS Switching in Core Networks
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Evolution to SDN
Business and Network Applications
Network Orchestration
(customer portals, topology views, network
applications – QoS monitoring, PM reporting, etc.)
(coordinates and controls allocation of all
network resources)
Open APIs
SDN Controller
Controls how all network elements forward packets. Provides centralized,
abstracted view of the overall network. Runs in high-compute data center.
Open APIs for config (e.g.,
NETCONF) and forwarding
(e.g. OpenFlow)
Control Plane
Data Plane
Flexibility to introduce new services, reconfigure based on global
policy; Global visibility; Reduced OPEX
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Migrating to SDN  APIs
1G w/ IPTV
Billing System
API
API
Activate 1G w/ IPTV
Network Orchestration Layer
API
API
Activate 1G
Transport & Access NMS
Cloud NMS
(AOE)
Activate
BNG, IPTV
API
API
The
Cloud
Activate IGMP,
EVCs, QoS,
Traffic Mgmt,
etc.
Nx10/100G DWDM
Metro Transport
ACS
Activate Home
Wi-Fi & STBs
API
Enterprise
Gateway
CE NID
RG
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22
Network Functions Virtualization (NFV)
Source: ETSI
NFV focuses on converting network functions (SBC, firewall, DPI, BRAS, etc.)
to software applications on a virtual infrastructure
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SDN & NFV Relationship
Creates competitive
supply of innovative
applications by
third parties
Creates network
abstractions to
enable faster
innovation
Open
Innovation
Software
Defined
Networks
Network
Functions
Virtualization
Reduces CAPEX, OPEX,
space and power
consumption
Source: ETSI
SDN & NFV are independent technologies that may or may not be used
together, but maximize value when deployed together
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Combining SDN and NFV
Billing System
Virtualized Network Functions
Service Activation
Request
Service Chaining – mapping logical
flow of virtual and physical resources
Service Orchestration
NFV Orchestration – mapping
Data Center VNFs
The
Cloud
virtual resources to compute nodes
in data center or customer edge
Metro Transport
(Nx100G)
D-NFV CPE
Network Orchestration – building services
across multiple network elements between cloud
and subscriber
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25
Cloud Edge Transport & Access
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Optimizing Edge Transport
Physical View
Remote Cabinet
Central Office
Logical View
Central Office
20G Cross-Slot LAG per RT
ETOS-10 with
Cross-Slot LAG
Move away from multi-hop rings for high-bandwidth, low-latency
access to data centers
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Expanding Cloud Access Options
Fiber
Copper
< 8,000 ft
$
$
FTTN
< 500 ft
FTTB/
FTTdp
$
FTTH/
FTTP
$
FTTN
FTTdp/
FTTB
VDSL2
Vectored
VDSL2
VDSL2
FTTP
$
$
Super
vectoring
G.fast
GPON
100M
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NGPON2
1G
Nx10G
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Converged Services over PON
Capabilities
Multiwavelength
NGPON2
10G EPON/
XGPON1
GPON/EPON
Cost
NGPON2 enables multi-service cloud access architecture
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29
Converging Edge Transport & Access
Wavelength
Mux
CPRI, P2P 10G, etc.
WM2
P2P WDM
GPON/
NGPON2
ONTs
NGPON2 OLT
TWDM
PONs
P2
WM1
Mux/
demux
PON
Splitter
CEx
OLT
GPON and/or Fixed 10/10 NGPON
Co-existence
element
Fixed Optics
NGPON2 offers multi-service scalability and flexibility with modular
components that can be added as needed
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Summary
 High-bandwidth, cloud-centric apps are dominating
– IP video is the biggest contributor and growing with 4K HDTV
– SDAN is the future of access network automation
– Distributed NFV helping transition to software-centric networks
 Applying Data Center Architectures
– Data center architectures needed to address scale and service agility
requirements
– Automation and distributed computing are key
 SDN & NFV are Key Components of NG Network
– SDN addresses network automation
– NFV enables transition to software-based services
 Efficient Cloud Access & Edge Transport are Key
– Efficient edge transport required for optimal cloud access
– Copper and fiber access options continue to evolve and NGPON2 will
play a key role moving forward
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© 2015 ADTRAN, Inc. All rights reserved.
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