Transcript Mark Broadhurst - Cisco pptx

Broadband Access
Evolution – FTTH
Mark Broadhurst
Consulting Engineer – UK Service Providers - Cisco
© 2008 Cisco Systems, Inc. All rights reserved.
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Cisco VNI: video traffic will dominate
45
Online Gaming
40
Video Calling
Exabytes/mo
35
15%
VoIP
Web and Data
27%
30
File Sharing
25
Internet-Video-to-TV
20
36% CAGR 2009–2014
Internet Video
10%
15
10
46%
5
0
2009
2010
2011
2012
2013
2014
Source: Cisco Visual Networking Index (VNI) Global Forecast, 2009–2014
© 2008 Cisco Systems, Inc. All rights reserved.
2
Video as a major driver for high access bitrate
requirements
 TV – broadcast, video on demand
SDTV
HDTV
3D-HDTV
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Video / image up-/ download (YouTube & Co.)
Remote collaboration on video content
Video / image e-mail
Video surveillance
Gaming
Remote health-care via High-Definition Telepresence, ...
...
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3
Broadband growth continuing
Physical access bitrates
Typical for European
Internet users
• 100 Mbit/ in 2014
• 1 Gbit/s in 2019
• > 50% growth y/y
Source: Graham Finnie, HeavyReading
 Access bitrates driven by Visual Networking
 Down- / upload of Blue-Ray disc in 1h: 120 Mbit/s
 Cloud computing – your notebook has a GE i/f for a reason
 Very high symmetrical physical bitrates >>100 Mbit/s
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Summary bitrate drivers
 “Video” is more than just TV
 Video related applications and services (“Visual
Networking”) will determine access bitrate requirements
 Need to support multiple video applications
concurrently in a household
 Content will become more and more “high definition”
 Majority of applications require symmetrical access
bitrates
 Both sustainable bitrates for streaming video as well as
high peak bitrates for transfer of large (video) files are
required
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Requirements for a future-proof FTTH solution
 Support for
growing bitrate requirements ... 50% YoY
=> DSL technologies will reach physical limits during the next
decade
over the lifetime of the fiber plant ... >40 years
without any major modification of the passive infrastructure
... no introduction of additional components in the fiber plant
easy upgrade of transmission speeds
... on a per-customer basis
 Easy management
simple trouble-shooting
self-installation of CPEs
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6
FTTH / FTTB Topologies
IP/MPLS
Edge/core
Ethernet/ MPLS
Aggregation Network
FTTx
Access Network
P2MP
PE-AGG Access
OLT
Splitter /
Filter /
Active device
P2P
STB
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7
Topology comparison
Point-to-point
Point-to-multipoint
Bitrate potential
Virtually unlimited
Limited by characteristics
of aggregation point
Technology dependence
None
Limited to few classes of
access technologies
Technology upgrade
Per subscriber
Per aggregation point
Open access to fiber
Straightforward
Complex / impossible
Troubleshooting
Simple – OTDR
Complex – failure
correlation
Number of feeder fibers
One fiber per subscriber
One fiber per aggregation
point
Dimension of fiber
management
One port per subscriber
One port per aggregation
point
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Capex distribution in the passive
network
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Source: Swisscom
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Technology comparison
Ethernet
PON
Scalability
100Mbit/s ... 10Gbit/s ...
2.5 ... 10Gbit/s
Bitrate sharing
Dedicated bitrate
Shared bitrate
Security
High through dedicated
medium
Requires encryption,
vulnerable to DoS attacks
Upstream traffic
management
Highly sophisticated
through switch matrix
Limited by capabilities of
MAC protocol
Interoperability OLT-CPE
Easy because of
ubiquitous technology
Still challenging
Per subscriber CO power
consumption
Well defined low value
Depends on take rate (≈2W), independent of take from very high to very low
rate
CO real estate usage
≈1150 homes connected
per rack
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Depends on take rate from very high to very low
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Fiber business models
Vertically
integrated
model
Dark fiber
model
Bitstream
open access
model
Multilayer open
access model
Access,
Services
& Content
Network
(Backbone & Access)
Physical Infrastructure
(Dark Fiber)
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Requires open access to fibers
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How do you determine the right FTTH
access topology?
Understand your options for the deployment of fiber in
various topologies
•
Which business models do you plan to implement today?
•
Which business models do you plan to implement in 20 years
from now?
•
Are restrictions for the deployment of certain topologies based
on
serious analysis of the existing infrastructure (e.g., ducts),
conservative assumptions,
or driven by considerations to enable / prevent certain
business models?

If your access infrastructure needs to be flexible,
business model and technology agnostic,
then deploy point-to-point fiber
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FTTH / FTTB Topologies
IP/MPLS
Edge/core
Ethernet/ MPLS
Aggregation Network
PE-AGG
P2MP
Access
OLT
P2P
STB
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How do you determine the right FTTH
access technology?
Understand your options for the technologies to be used
over the fiber topology
•
Which peak bitrates will your customers require over the
lifetime of the technology (e.g., 5 years) which you deploy
today?
•
Do you want to differentiate technologies between low-tier
and high-tier residentials, SMEs, enterprises?
•
Is a unified approach simpler and cheaper in the end?
•
Do you need an RF video overlay?

If your technology choice needs to be equally suited for all
types of customers, be highly scalable, mature, secure,
then deploy Ethernet
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Summary
 Video-related applications and services continue to
drive exponential access bit rate growth
 Applications increasingly require ultra-high-speed
symmetrical connectivity
 A new fiber plant is the most valuable asset, think long
term
 Ethernet is the clear choice of virtually all major FTTH
deployments in Europe
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© 2008 Cisco Systems, Inc. All rights reserved.
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