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8/7/2019 video_optimized_maps
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© 2004 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE1 of 6
White Paper
Video Opt im ized MAPs
The Key to Efficient Triple Play Video Delivery
14 July 2004, Rev. B
Triple Play delivers video, data, and voice over a single ADSL line or fiber strand,providing carriers with the arsenal needed to defeat cable companies in the battle for subscribers. Video optimized Multi-service Access Platforms (MAPs) use ADSL and FTTH in the last mile to create a video delivery service that profitably grows revenue while protecting carriers’ markets.
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© 2004 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE2 of 6
Video Opt im ized MAPsTriple Play’s Key to Efficient Video Delivery
14 July 2004, Rev. B
Triple Play delivers video, data, and voice over a single ADSL line or fiber strand,providing carriers with the arsenal needed to defeat cable companies in the battle for subscribers. Video optimized Multi-service Access Platforms (MAPs) use
ADSL and FTTH in the last mile to create a video delivery service that profitably grows revenue while protecting carriers’ markets.
On-Demand ProgrammingTr ip le Play and Video-Opt im ized MAP
Triple Play delivers
video, data, and voice
to subscribers .
Video-optimized
MAPs provide greater
bandwidth, more
operating flexibility,
extended
management facilities,
and importantly,
video-focused
intelligence.
Independent Operating Carriers are countering the cable television
industry’s expansion efforts by planning and deploying Triple Play services.
Whether leveraging existing copper infrastructure or maximizing the value of
newly deployed FTTx infrastructure, Triple Play delivers video, data, andvoice services to subscribers in order to provide telcos with a larger, more
economically resilient market than voice and data alone. In fact, analysts at
the marketing research firm In-Stat/MDR anticipate that the Triple Play
market in North America will exceed $2.7 billion by 2005.
However, to deliver video via this expanded conduit increases demands on
equipment such as DSL Access Multiplexers (DSLAMs) or Multiservice
Access Platforms (MAPs). The primary difference between the two is the
subscriber-side interface. DSLAMs, as the name implies, provide service
over copper wire using DSL technology, but MAPs carry additional
capabilities by also supporting FTTH and other types of interfaces out of the
same platform. First generation DSLAMs were intended to provide legacy
voice (POTS) and data, and they delivered 1.5Mbps of downstream
bandwidth using legacy carrier technologies (ie. ATM) to ease
implementation. To deliver on the promises of next generation Triple Play
services, however, a video-optimized DSLAM or MAP must provide greater
bandwidth, more operating flexibility, extended management facilities, and
most importantly, video-focused intelligence to maximize network efficiency
and guarantee reliability. Understanding these requirements is the first
crucial step toward planning a successful Triple Play deployment.
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© 2003 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE3 of 6
The Pow er and Promise of Vi deo
Triple Play allows
Telcos to compete
with their own
threesome of video,
high-quality voice, and
high speed Internet
access.
Video is the new weapon in a carrier’s competitive arsenal. As cable
operators cherry-pick high-revenue subscribers by adding VoIP services to
their traditional video and high speed Internet offeringsthey present a
threat to permanently lock carriers out of these accounts. Today, carrierscan battle back by adding video to their traditional offerings of voice and high
speed DSL Internet to compete with their own Triple Play of services.
The standard Triple Play offers subscribers four distinct video services, each
a potential gold mine for carriers.
Broadcast videoThis staple of cable television can produce $20 to
$50 of revenue per subscriber, per month.
Premium channelsPremium channels such as HBO and Showtime
can increase monthly video revenues by 50 percent or more.
Combining standard broadcast with premium channels can amount to
more than 150 unique video streams for carriers to offer their
subscribers .Pay per ViewPay per View subscribers join a specific multicast
streamsuch as championship boxing matches or other sporting
eventsat a set time. Revenue is dependent on the volume of
broadcast events.
Video on DemandVideo on Demand allows subscribers to select
content for delivery at a time of their choosing. This service can
generate monthly revenues of $8 to $12 per subscriber.
In total, video typically creates up to $65 of incremental monthly revenue per
subscriber according to In-Stat/MDR.
Next Generat ion TechnologyThe Flexib i l i t y of ADSL
ADSL2+ supports
HDTV and allows
more channels per
subscriber, greatly enhancing video
delivery.
Delivering video – especially over ADSL – requires the DSLAM or MAP to
adopt several new capabilities. One of the most important requirements is
for the support for new ADSL technologies like ADSL2 and ADSL2+. A
broadcast-quality video channel consumes 3.5 to 4.0Mbps of bandwidth,
which far exceeds the 1.5Mbps delivered by standard MAPs in the first
generation of ADSL. Therefore, creating a “video pipe” that is 10Mbpsat a
minimumis required.
A video-optimized MAP must easily adapt to new ADSL standards as the
industry accepts them, most ideal ly through the use of remote softwareupgrades. Similarly, a video-optimized MAP should support multiple ADSL
technologies so carriers can use a variety of Customer Premises Equipment
(CPE) to keep their costs down.
More ADSL advances are forthcoming. ADSL2+ delivers up to 24Mbps over
loops up to 8,000 ft. and supports HDTV, allowing more channels per
subscriber and greatly enhancing video delivery. And the yet-to-be-
discovered technologies that lie beyond ADSL2+ are certain to be even
more exciting.
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© 2003 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE4 of 6
The Bandw id th Comm odi tyUs ing Resources Ef f ic ient ly
CPE use IGMP as a
tool to inject or
remove subscribers
from video streams.
To be competitive,
carriers must take
advantage of the
ever-declining cost of
Ethernet and IP
equipment.
More than 90 percent
of network traffic
begins and ends
using IP and Ethernet,
therefore it is more
economical and more
simple to build a
network with a video-
optimized MAP.
The efficient use of network bandwidth is critical to the business success of
Triple Play services and must be addressed in a video-optimized MAP.
Local loop bandwidth over legacy copper infrastructure is but a fraction of
the capacity of a cable television drop. To compensate for this more limited
capacity, a video optimized MAP transports only those video streams
requested by the subscriber. Selecting and delivering the desired
programming is accomplished through signaling that is performed byor on
behalf ofthe subscriber. A video-optimized MAP must perform or support
this signaling.
Internet Group Multicast Protocol (IGMP)a standard IP protocolis the
most efficient signaling mechanism available for this task. IGMP queries are
sent between the subscriber’s CPE and a Layer 3 switch that performs
multicasting. The CPE uses IGMP as a tool to inject or remove a subscriberfrom a video stream.
The switch also sends IGMP queries once per minute to every subscriber in
a multicast group to validate membership. Subscribers’ CPE must respond
to each query. Because all IGMP traffic passes through a MAP, i t can snoop
this traffic and consolidate responses from each subscriber CPE into one
response per multicast streama task that greatly reduces the amount of
overhead processing performed by the switch. The MAP should also
accurately replicate multicast video to avoid transmitting redundant streams
across the entire network. As video deployment grows, effective IGMP
snooping and stream replication by MAPs allow more subscribers to be
supported by fewer resources, saving operating and capital expense. The
net result is that less transport bandwidth is required from the MAP towards
the content insertion point (i.e. Head end).
Because a video stream consumes sizable line capacity, a video-optimized
MAP must also make the most efficient use of associated resources.
Bandwidth-robbing network overheadsuch as the ATM cell tax is a
liability. More than 90 percent of network traffic begins and ends using IP
and Ethernet, therefore it is more economical and more simple to build a
network with a video-optimized MAP that adheres to the same model.
Finally, a video-optimized MAP should exploit Moore’s Law. (Based on
forecasts made by Gordon Moore, Intel cofounder, in 1965 and 1975.
Moore’s Law states that microchip technology will double in complexity every18 months.) To be competitive, carriers must take advantage of the ever-
declining cost of Ethernet and IP equipment.
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© 2003 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE5 of 6
Qual i ty of Serv ic eDel iver the Best Per formanc e
MPEG-4 may reduce
transmission time by
half, permitting more channels per
connection.
A video-optimized
MAP deters such theft
by delivering video
sessions to only
specific Ethernet MAC
addresses.
In addition to video, Triple Play service includes data and voice over a
common access network/transport. This array of services creates the
potential for bandwidth contention resulting in diminished performance within
one or more of the services. One way a video-optimized MAP reducescontention is by directly managing Quality of Service (QoS). A video-
optimized MAP employs a QoS hierarchy for each service it supports by
mapping the hierarchy across subscriber devices. Using defined priorities
the network then allocates available bandwidth to services to ensure best
relative performance.
A video-optimized MAP also maximizes performance by adapting to
improvements in video compression technology. MPEG-2 compresses full
motion video and sound to 3.5 - 4.0Mbps. MPEG-4 may reduce that by half,
permitting more channels per connection. A video-optimized MAP should be
agnostic to the brand of video encoders that digitize, compress, and encode
video into IP packets.
Securing the Content
Theft of video services is a widespread problem in cable television. A video-
optimized MAP deters such theft by delivering video sessions to only specific
Ethernet MAC addresses. This prevents service delivery to a set top box that
has been either spoofed or stolen from a legitimate subscriber.
The management
process should be
intuitive and should
avoid labor-intensive
administration of
virtual circuits.
Reliability and Management
Reliability is a high priority for video subscribers. A video-optimized MAP
must constantly monitor all links and loops and report on problems when
conditions cross carrier-defined thresholds. The MAP also must monitor its
own health. In addition, there should be several means of management
access, including a local craft interface and remote access via the Internet.
The management process should be intuitive and should avoid labor-
intensive administration of virtual circuits. Finally, a centralized Network
Management System (NMS) must be available to serve as a means to
perform network monitoring, service and feature configuration, and network
maintenance.
The Ul t imat e GoalPlan to Succ eed
Video-optimized MAPs deliver services
that profitably grow
revenue and protect
carriers’ markets.
Delivering Triple Play services requires meticulous planning and constant
support to develop and tune the network. A video-optimized MAP suppliershould not only deliver a quality product but also ensure that the application
and all its constituent parts work harmoniously. This requires in-depth
understanding of the applications, video network components, and the
means to perform interoperability certification for customers.
The ultimate goal of a video-optimized MAP is to deliver a service that
profitably grows revenue and protects a carrier’s market. A thorough
evaluation of risks, requirements, and features will lead each carrier to the
solution that best suits its needs.
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© 2003 Allied Telesyn, Inc.
Video Optimized MAPs, 14 July 2004, Rev. Bwww.alliedtelesyn.com PAGE6 of 6
Company Overview
Al l ied Te lesyn: I t ’s Our Net w ork , Too.
A global company with nearly two decades of continuous profitability.
Allied Telesyn focuses entirely on end-to-
end, purpose-built Ethernet applications. A world-class engineering and support organization spanning five continents and more than 30 countries.
The ideal choice for
cost-conscious IT
professionals who are
looking for high-
quality, feature-rich
network solutions.
Founded in 1987 with the goal of producing feature-rich, reliable, standards -
based networking products, Allied Telesyn has a proven track record inbridging the gap left by other Ethernet networking manufacturers, whose
solutions are often limited in scope or cost-prohibitive.
By taking cues directly from our customers and leveraging our globalmanufacturing competencies, we’ve evolved a market-focused approach to
system development that is geared entirely to applications, rather than
individual components. And by concentrating on battle-tested, end-to-end
solutions for vertical market applications we avoid the scattershot, company-
focused approach common in the industry. Our tagline: “It’s our Network,
too” is a testament to our high-level of accountability and to our investment
in our customers’ bottom line success.
Allied Telesyn focuses entirely on end-to-end, purpose-built Ethernet and IPapplications; with a complete line of networking products that includes Layer
2 switches, Layer 3 switches, carrier class fiber/copper Multiservice Access
Platforms, wireless access points, wireless adapter cards, and residential
gateways. No other networking vendor can match Allied Telesyn’s breadth
and depth of Ethernet products we are the leading manufacturer of media
converters, unmanaged Fast Ethernet switches and hubs, fiber optic network
adapters and other feature-rich interconnectivity products, worldwide.
Additionally, Allied Telesyn has developed a world class systems
engineering and support organization that ensures networks are designed
and implemented to handle the stress of providing voice, video and data
services.
With engineering, manufacturing, sales, and distribution divisionsstrategically located throughout the Americas, Europe, Asia and Japan,
Allied Telesyn is able to deploy solutions anywhere in the world, quickly and
efficiently. And by rigorously testing products in design and support centers
and leveraging our design and manufacturing competencies, Allied Telesyn
is able to offer solutions for the access edge that are both customized and
plug-and-play. This ideal combination helps our customers keep costs low,
speed network deployment and maximize network uptime.
Our customer-driven approachcombined with a pragmatic, value-based
pricing scheme and a superlative service organizationhas made Allied
Telesyn a global networking leader, with more than 17 years of continuous
profitability and products deployed in more than 50,000 companies in 30
countries and five continents. Allied Telesyn: the ideal choice for cost-
conscious IT professionals who are looking for high -quality, feature-rich
network solutions at a lower price.
www.a l l ied te lesyn.com