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7/31/2019 Evolution of Broadband Network en AppNote
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EVOLUTION OFTHE BROADBANDNETWORK
GATEWAYINCREASE PROFIT AND LOYALTYBY DELIVERING RESIDENTIALSUBSCRIBERS THE FREEDOMTHEY CRAVEAPPLICATION NOTE
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TABLE OF CONTENTS
Abstract / 1
What subscribers want / 2
Subscriber freedom today: OTT VoD / 3
Evolving the residential services network / 5
Limitations of centralized BRAS architectures / 5
Requirements for the next-generation BNG / 6
Alcatel-Lucent 7750 SR: Purpose-built IP services platform / 9
Industry-leading BNG capability / 9
Industry-leading performance / 10
Distributed service intelligence / 10
Flexible IPv4 extension/IPv6 migration / 11
Metering and fair-share use / 12
Application assurance and subscriber-friendly plans / 12
OTT Monetization / 14
Location freedom: Wi-Fi / 15
Enhanced services / 16
Enhanced IPTV / 16
Evolving video services and CDNs / 17
Conclusion / 18
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ABSTRACTResidential service providers today are at odds with the very subscribers they serve.
Along with the liberating experience o Over The Top VoD Video on Demand (OTT VoD)
services that cater to their unique needs, subscribers now want the reedom o a
broadband service without boundaries one in which they can consume any content
or application, on any device, anytime, anywhere. Challenged by the negative impact o
OTT VoD trac on network bandwidth and the perceived threat to their PayTV services,
service providers are responding with rigid caps on bandwidth utilization.
There is a better way. Rather than discourage the use o the very service they provide,
service providers can embrace subscriber demands or reedom and enhance their services
to thrive on higher bandwidth consumption. However, realizing these goals requires
change. Centralized Broadband Remote Access Server (BRAS) architectures lack the scale,
perormance and service fexibility to thrive in this new VoD-dominated era. Service pro-
viders require a new approach to planning and building residential networks, an approach
that embraces more perormance, distributed subscriber management and enhanced
eature capabilities to deliver higher quality, more personalized subscriber services.
Targeted to service providers as well as product marketing, network architecture andnetwork operations executives, this document provides an overview o changing subscriber
needs, the new service opportunities now open to service providers and the transormation
challenges they ace. We explain how all o these challenges and opportunities are best
addressed with a distributed residential services architecture based on the Alcatel-Lucent
7750 Service Router (SR).
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MARKET TRENDS AND CHALLENGESWhat subscribers want
Residential broadband networks are once again entering a period o major change
and opportunity driven by subscriber needs and expectations (see Figure 1). The
rst-generation networks based on centralized BRAS routers were driven by subscriber
demand or an always-on High Speed Internet (HSI) service. The second generation,
powered by Ethernet-based Broadband Network Gateway (BNG) routers, was driven by
subscriber demand or a linear TV service (content broadcast at specic times) delivered
in conjunction with voice and HSI services.
Todays increasingly sophisticated and Internet-savvy subscribers are raising the bar yet
again. They want to remove the boundaries and limitations imposed by todays broadband
services and customer premises equipment to create a richer, personalized experience that
leverages all that the Internet and the consumer electronics industry have to oer.
Figure 1. Customer expectations driving residential broadband evolution
More specically, subscribers want:
Device reedom: The ability to consume, control and share content and the HSI
connection on any device rom PC to gaming console, to tablet to big-screen TV.
Schedule reedom: The ability to consume content based on their schedule, whether
live, time shited or on demand.
Location reedom: The ability to replicate the home experience outside the home at
Wi-Fi hotspots in stadiums, coee shops, shopping malls and airports. Plan reedom: The ability to attain optimal value through customized HSI plans that
refect each subscribers unique application and content consumption needs.
Content reedom: The fexibility to consume any content whether cloud, premium,
live or user generated at a resolution level that meets their changing needs and the
capabilities o the consuming device.
Interactive reedom: The ability to transorm content consumption into an interactive
experience, with sidebar content and suggestions, social media integration, and
interacting ads and content. The ability to consume networked applications such as
online gaming without the quality issues that diminish such online experiences today.
CUSTOMER
EXPECTATION
INTERNET
CONNECTIVITY
IPTV AND
TRIPLE PLAY
BROADBAND
WITHOUT BOUNDARIES
RESIDENTIAL EDGE
TECHNOLOGY FOCUS
RESIDENTIAL EDGE
ROUTING PLATFORM
IP forwarding
Single service
ATM
IPTV multicasting
Service silos
Ethernet
VoD streaming
Service blendingand personalization
IPv6, Wi-Fi
BRAS
OBSOLETE
BRAS andvideo edge
Enhanced BNG
OBSOLETE
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Subscribers also want the reedom to blend attributes o dierent residential services
such as the high quality o linear TV , the fexibility o VoD and the interactivity o the
web into a single, personalized service experience that ullls their unique digital
liestyle needs. For example, a subscriber may want to watch an on-demand video that
is not part o the premium linear TV lineup but has high video quality, ed directly to the
big-screen TV, while using a tablet device to interact with other viewers through social
networks and reviewing suggestions or related web and video content.
Subscriber freedom today: OTT VoD
OTT VoD providers were the rst to identiy and capitalize on this demand or reedom.
Innovators such as Netfix and YouTube launched fexible VoD services that have
become household names and, in conjunction with VoD oerings rom later entrants,
are expected to consume over 58 percent o Internet bandwidth by 2015. Google and
Apple are taking these rst-generation services to the next level by adding their cloud
inrastructure, consumer devices and operating systems into the mix to provide a richer
experience within the connes o their brand and ecosystem.
For service providers, this represents both a challenge and an opportunity (see Figure 2
and Figure 3). A challenge because a single unicast VoD session consumes the same
network bandwidth as a linear-TV fow delivered to thousands o subscribers through
multicast. A challenge because VoD streaming protocols and applications are relentless;
they adjust to changing network conditions, consuming new network capacity as soon
as it is made available.
The impact on service providers has been rapid, global and signicant. In the United
States alone, approximately one third o ISP network capacity at peak times is now being
consumed by Netfix users who represent a small raction o the total ISP subscriber
base. OTT VoD providers across the globe are creating similar challenges or service
providers in Canada (Netfix), the United Kingdom (BBC iPlayer) and China (Youku.com),
to name only a ew.
Figure 2. The impact o VoD on IP network bandwidth
Controlled with P2P throttling Optimized with multicast No throttle, no multicast
NETWORK BROADBAND UTILIZATION COMPARISON
7 musicdownloads
Data: Caffeinated Bitstream, 2009
One IPTV channel,1000 subscribers
One VoD movie,1000 subscribers
14000
Kilobitspersecond
Kilobitspersecond
Kilobitspersecond
12000
10000
8000
6000
4000
2000
0
14000
12000
10000
8000
6000
4000
2000
0
14000
12000
10000
8000
6000
4000
2000
0
0 200
1.07 Mb upload
400 600 800 1000 1200 1400 0 1000 2000 3000 4000 5000 6000 0 1000 2000 3000
Time (seconds Time (seconds Time (seconds
4000 5000 6000
24.40 Mb download 2.17 Mb upload 1.13 Gb download 2.17 Mb upload 1.13 Gb download
x1000
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Figure 3. The fnancial impact o OTT VoD on service providers
Service providers have responded to the OTT VoD bandwidth challenge and the shit
away rom their own linear TV services by introducing rigid bandwidth caps and
down-speed techniques that limit bandwidth consumption on their HSI services. While
this approach does provide short-term relie, it pits the service provider against their
customer the subscriber and damages this all-important relationship. It also reposi-
tions the OTT vendor who ullls subscriber demands or reedom at the top o the value
chain and popularity polls. There is a better way.
Winning the battle or the subscriber
Rather than discourage the use o the very service they provide, service providers shouldembrace the concept o subscriber reedom and leverage their core strengths to thrive on
increasing network usage (see Figure 4).
Figure 4. Wining the battle or the subscriber
Bandwidthperuser
2000 2005
Source: Alcatel-Lucent, 2011
Source: Informa, 2011
BBC iPlayer
Netflix
youku.com
2010
Residential HSI profit
2015
NETFLIX GENERATES 30% OF ISP TRAFFICWITH 3% OF ISP SUBSCRIBER BASE
VoD WILL ACCOUNT FOR 58%OF ALL TRAFFIC BY 2015
Residential HSI bandwidth
Consumer electronics ecosystems
OTT contentand application
providersServiceprovider
SP strength Control network access
Premium linear TV service
Home ecosystem visibility
Opportunity Ensure fair-share use with personalized subscriber
plans, monetize OTT apps/content, add Wi-Fi
Enrich with VoD and web content, add new app services
Use data to personalize subcriber experience, insert ads
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Because they control access to the subscriber, service providers are in a unique position
to ree subscribers rom OTT VoD service quality issues by providing a consistently high
quality o experience (QoE) that will always be outside o the OTT vendors scope o
control to deliver. They can monetize the OTT fows that travel through their network,
provide subscribers with optimal application-aware plans to ree them rom rigid usage
caps or oer Wi-Fi access to provide the reedom o a home experience o-the-wire.
They can work with OTT vendors to provide optimized application services that ree
subscribers rom best-eort quality limitations o OTT gaming, person-to-person (p2p)video conerencing and other applications.
Service providers can also leverage their strong relationships with content providers.
They can enrich current linear TV services with VoD and web content to deliver the
blended broadband service experience their customers crave.
Finally, service providers can use their unique ability to gather perormance and service
usage data to personalize services and insert personalized ads.
At stake in this battle or the subscriber is hundreds o billions o dollars in revenue
rom content alone, and the service providers position in the value chain whether as
a provider o commodity Internet access or as a conduit or value-added services. Withall the limitations o todays legacy BRAS-based architectures still in place, many service
providers are ill equipped to win their share o the revenue pie.
EVOLVING THE RESIDENTIALSERVICES NETWORK
Limitations of centralized BRAS architectures
Figure 5 shows some o the key limitations o todays legacy broadband architectures.
Figure 5. Traditional centralized BRAS architectures
Pay TV(big-screen TV)
High-speed Internet(PC)
Videoservice edge
BRAS
Fixed access Aggregation
VoD streams traverse entire network
Videoservers
ExternalCDN or
transparentcache
Internet
CPE
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Overlay model limitations
Residential services today are delivered on separate IP service platorms; HSI service is
delivered through the BRAS router while video service is delivered through a separate
video edge router. Each service connects to a dierent device at the home (TV or PC),
oten provisioned with a dierent IP address. This wall between services and lack
o unied subscriber treatment makes it dicult to deliver the blended, personalized
experience that subscribers want and is at odds with the demand or convergence
within the home.
An overlay architecture is also very expensive to deploy and maintain. Multiple IP service
platorms quickly deplete capital budgets, and the service overlays they spawn result in
complex provisioning and capacity planning in the access and aggregation networks.
Centralized architecture limitations
The HSI service that contains all the unicast video fows rom Internet-based OTT providers is
delivered to subscribers rom centralized BRAS routers deep within the service providers
network. Each time a subscriber starts a VoD session, a new video stream is created between
the servers/caches that contain the content and the subscriber. The resulting trac crosses
the service providers entire network, rom the peering point or transparent cache behind
the BRAS router all the way to the subscribers residence.
As more and more users shit to VoD content consumption, transport costs or video
skyrocket, and the resulting network and server congestion lowers perormance and
service availability. With video taking center stage as the killer app or residential use,
central content injection and a central BRAS no longer make sense.
BRAS legacy obsolescence issues
BRAS routers may have impressive subscriber density or yesterdays Internet trac mix
but, with Internet video in the picture, they lack the perormance and capacity to keep
up. Actual subscriber density quickly drops as more and more users stream video, and
the economies o scale o a centralized BRAS architecture quickly crumble.
IPv6 migration is also an area o concern or service providers because so many legacy
BRAS routers lack the perormance and scale o a carrier-grade network address translation
(NAT) capability to enable fexible IPv4-to-IPv6 migration. And because a BRAS is a
single-service delivery platorm (HSI), it lacks the capability to delivery new eatures or
services beyond basic HSI or reap the operational and cost benets o service convergence.
Requirements for the nextgeneration BNG
A new, distributed architecture optimized or video growth and service convergence is
required to capitalize on the delivery o subscriber reedom(see Figure 6). This architecture
is based on a BNG platorm with the attributes that ollow.
Massive scale and perormance
The BNG must sustain high throughput and be capable o 100G+ speeds with services
to support the rapid growth and monetization o video. This massive scale also enables
convergence: the ability to deliver all residential services rom a common delivery platorm
in the IP edge. Convergence enables a unied view o each subscriber with consistent
treatment o all the subscribers trac across all services used. This enhances a service
providers ability to deliver a blended, high-quality service experience that is personalized
or each subscriber and eases the task o capacity planning across the dierent services.
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Convergence also simplies provisioning by removing the need or multiple service
overlays in the access and aggregation networks and the need or multiple IP addresses
per subscriber.
Distributed service intelligence
The BNG must contain IP over Ethernet/Dynamic Host Conguration Protocol (IPoE/DHCP)
subscriber management capabilities or multiservice support while remaining backwards
compatible with legacy Point-to-Point Protocol over Ethernet (PPPoE). Service intelligence
to help simpliy provisioning and authentication and to ensure high availability is a
baseline requirement. Multiple queues per subscriber with fexible allocation are required
to ensure quality o service (QoS) or multiple services and applications.
In a distributed architecture, subscriber management, content caches and high-touch
processing capabilities move to the edge o the network, closer to the customer. By
distributing service intelligence to the edge, service providers can provision more band-width and ewer subscribers per Gigabit Ethernet (GigE) port to accommodate the growth
o video and other high-bandwidth services. VoD fows are limited to high-bandwidth
access networks and no longer traverse the entire IP network. This has the dual benet
o enabling long-term scale and lowering cost per bit or video transport. Because VoD
content delivered by the service provider has a much shorter distance to travel compared
to content rom the OTT VoD cloud, service providers can also oer signicantly higher
service quality and perormance than OTT oerings.
Service providers looking or a uture-sae approach to delivering truly dierentiated
residential services need to consider the benets o introducing enhanced capabilities
such as high-touch processing to the common platorm. High-touch processing enables
extension o IPv4-based services, OTT monetization and new types o service bundles
and service personalization or residential subscribers. The ability to distribute application
monitoring and policy enorcement capabilities right to the edge o the network
ensures the highest quality o service or residential customers. Along with the universal
gateway capability described in the next section, this enhanced ability to truly monetize
subscriber reedom is the value o the enhanced BNG ( eBNG).
Figure 6. Distributed architecture based on a high-perormance, enhanced BNG
Videoservers
ExternalCDN ortransparentcache
Blended, personalized,high-QoE service
Internet
Subscriber
Fixed access Wi-Fi access
More bandwidth andfewer users per GE port
IP services edge
Monetizedcontent cache
eBNG
Service
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Universal gateway
An enhanced BNG has the ability to bring other services and access methods to the
common platorm. Service providers can integrate community Wi-Fi access to provide
exciting new service bundles that enrich the residential subscriber experience. They
can converge residential, business and mobile IP services on a single IP services edge
platorm to reduce total cost o ownership (TCO) and provide universal access to any
content/application rom any device, anywhere.
Service transormation: roadmap or success
With OTT VoD providers disrupting service provider business models and BRAS routers
lacking the perormance and scale to support cost-eective video delivery and fexible
IPv6 migration, the time to begin broadband network transormation is now. Once
theyve deployed a high perormance BNG at the IP edge o their residential network and
moved towards a more distributed architecture or subscriber management, service pro-
viders can truly start to capitalize on new revenue opportunities in the video-dominated
era o residential services (see Figure 7).
Figure 7. Flexible service transormation and new revenue opportunities
Service providers can start by monetizing OTT applications, enorcing air-share access
through personalized plans, oering Wi-Fi access or even enhancing existing video and
application services: the starting point will vary with each service provider. For example,
a service provider with existing linear TV services orming the bulk o their revenue may
choose to begin with enriching their video services through an on-net content delivery
network (CDN), while a service provider with no content experience may start by
optimizing their HSI service with application-based metering to create personalized plans.
Because each service transormation journey is likely to take many twists and turns as
subscriber needs, legislative constraints and even a service providers nancial position
change, it is o paramount importance that service providers invest in a platorm with
the fexibility to accommodate change.
Wi-Fi integrationEnhancedvideo services
OTT monetization
Legacy migration
Metering and fairshare use
OTT app zero rating HTTP error redirection Networked application
services (such as gaming)
Business intelligencegathering
Application- and content-aware metering
Personalizedplans
Real Wi-Fi Wholesale Wi-Fi Wi-Fi data offload
for 3G/4G
Enhanced IPTV VoD and content
delivery network Evolution to blended
video services
OBSOLETE
High scale andperformance
IPv6, ESM flexibility eBNG platform
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To assist providers in their service transormation journey, Alcatel-Lucent has integrated
all the industry-leading capabilities o a high-perormance BNG described in the previous
sections and all the value-added enhancements required to generate new service revenue
in the Alcatel-Lucent 7750 SR. Customers have the fexibility o installing a new 7750
SR chassis congured with this new unctionality or upgrading deployed 7750 SRs and
Alcatel-Lucent 7450 Ethernet Service Switches (ESSs). (The 7450 ESSs currently perorm
access aggregation or IPTV multicast delivery). The remainder o this paper discusses the
new service capabilities and the enhanced eature set that enables them o the 7750SR as outlined in Figure 7.
ALCATEL-LUCENT 7750 SR:PURPOSE-BUILT IP SERVICES PLATFORMThe rst step in the residential service transormation outlined in the previous section is
to replace the centralized BRAS architecture with a high-perormance BNG to enable IPv6
migration, VoD (unicast trac) scale and new service enablement. The Alcatel-Lucent
7750 SR addresses legacy platorm issues by providing the eatures, perormance and
scale lacking in BRAS routers.
Industryleading BNG capability
Alcatel-Lucent has a long track record as a key orce shaping the direction o residential
broadband networks. The BNG capability o the 7750 SR draws rom this experience and
expertise to lead the BNG market in fexibility, scale and robustness:
ArobustsubscribermanagementimplementationthatconvergeslegacyPPPoEaccess
with IPoE to enable video and other new service capabilities
MultivendorsupportforRADIUSauthentication,withbuilt-inDHCP-RADIUSproxy
unctions to leverage existing authentication inrastructure
FlexibleIPaddressmanagementbyDHCPrelayorintegratedDHCPservers
PPPoE-basedretailandwholesalesupportwithLayer2TunnelingProtocollocationarea code support
Supportfortime-andvolume-basedaccountingwithRADIUS-orDiameter-based
credit control to support pre-paid and other new services
AutomatedprovisioningoflogicalaccessinterfacesthroughamanagedServices
Access Point concept to minimize operational costs and reduce time-to-market
8ingressand8egressqueuespersubscriber(usinghigh-speedMediaDependent
Adapter[HS-MDA]) to support multiple services or service personalization (through
QoS per application)
Flexibleuseofnetworkinfrastructure:canactasaBNGoranEthernetAggregation
Node (EAN) simultaneously or extend subscriber management unctionality across
an access network through pseudo-wires HighestlevelsofBNGredundancyinthemarkettoensureahigh-quality,always-on
service experience (through Subscriber Router Redundancy Protocol, multi-chassis
link aggregation, and pseudo-wires and VPLS link redundancy).
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Figure 8. Distributed service intelligence with the MS-ISA
Flexible IPv4 extension/IPv6 migration
The reality o IPv4 address exhaustion is hitting home as consumer electronics vendors
churn out more and more IP-capable devices. The result is that service providers can no
longer deer IPv6 migration strategies. With so much at stake as revenue-generating net-works undergo IPv6 transition, one size denitely does not t all. The 7750 SR provides
service providers with the fexibility to extend IPv4 liespan, migrate specic services or
networks to IPv6, or dive right into a ull-scale IPv4/IPv6 implementation (see Figure 9):
Industrys fastest channel change
Retransmit on error for high QoE
PerfectStream video conditioning
Video-quality monitoring
Content caching/delivery
VIDEO/CONTENT
Application-to-subscribermonitoring and control
Metering and fair-share usage
Service personalization andconsistency
APPLICATION ASSURANCE
Carrier-grade NAT
Multiple tunneling and IPv6migration capabilities
eBNG EXTENSIONS
Distributed Denial of Service(DDoS) attack mitigation
IPSec
SECURITY SERVICES
IntegratedServices Adapter
=
Figure 9. Flexible IPv6 migration
IPv4 subscriber (Router or bridge)
Extend IPv4 investment Carrier-grade NAT: 60 million
entries per chassis
Works with routed or bridged
home gateways
CGNAT
Internet
IPv4 IPv4
eBNG
IPv4 subscriber
Migrate access and service Carrier-grade NAT
IPv4 transport inIPv6 softwires
Internet
IPv6IPv4
eBNG
Dual stack subscriber
Complete migration Carrier-grade NAT
Dual stack everywhereCGNAT
Internet
Dual stack Dual stack
eBNG
CGNAT
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Extend use o IPv4 as long as possible
Adress overloading is avoided by embedding Carrier-Grade NAT (CG-NAT) capabilities
in the network with the MS-ISA hardware. With over 60 million entries per chassis,
the 7750 SR provides the most scalable integrated and carrier-grade NAT solution in
the industry. Extensions such as Layer 2-aware NAT provide even more fexibility and
operational savings by enabling IP-agnostic address translation.
Deploy dual stack in network only
The 7750 SR supports industry standards or sotwires that tunnel subscriber IPv4
packets through the service providers IPv6 network to an IPv4 Internet.
Adopt network-wide dual stack capability
(Broadband Forum in WT-177 or IPoE and in WT-187 or PPPoE)
The 7750 SR supports wire-rate, dual-stack routing and large-scale, dual-stack subscriber
management (256,000 subscribers per chassis) to support dual-stack transition.
METERING AND FAIR-SHARE USEWith a distributed architecture and a high perormance BNG at the IP edge, service
providers can start to capitalize on new revenue opportunities. One o the rst areas
o ocus or most service providers will be metering and air-share use.
As discussed in the section Market Trends and Challenges, consumers are dissatised
with current attempts by service providers to limit OTT VoD consumption, and they
eel HSI plans today are primarily designed solely to protect the service providers, not
to benet the subscriber. Current HSI plans are perceived as:
Rigid:allornothing,lackingpersonalization
Confusing:subscriberguessesatdataconsumptionrates,suffersbillshock
Punitive:linkdown-speed,automaticfees
Non-transparent
Service providers are aced with a dual challenge: dissatised customers and the inability to
push their own applications with bandwidth caps in place. With the 7750 SR as their BNG,
service providers attain a subscriber-riendly alternative to rigid use caps personalized
plans that let the subscriber make the trade-os and get optimal value rom their share
o bandwidth.
Application assurance and subscriberfriendly plans
Personalized plans are enabled by the unique ability o the application assurance (AA)
sotware on the MS-ISA module to ulll each subscribers application- and session-level
needs. With AA, service providers can see into their network down to the applicationlevel and limit, boost and re-prioritize that trac on a per-subscriber, per-session or
per-application basis (see Figure 10).
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Beore embarking on a personalized plan oering, service providers need to leverage AA
and get detailed business intelligence on their subscribers and their subscribers online
habits. Service providers can get answers to the types o questions that ollow.
Subscribers
Who are my top users?
What applications are they consuming?
How much bandwidth is required per application?
What is their usage prole per app?
Peering
Which apps are fowing through my peering points?
How much bandwidth do they consume?
Who are the top users o peering bandwidth?
Network
How do applications fow in my network?
Which applications use the most bandwidth, when?
How do applications perorm over time?
What percentage o trac is OTT?
Armed with this inormation, service providers can begin oering personalized plans toensure air-share usage in a manner that satises each o their subscribers unique needs.
An example o a specialized plan is shown in Figure 11.
Figure 10. Per subscriber/session/application monitoring and control
Subscribers
Subscribers
BRAS
Services Applicationgroups
Applications
Fixed access
Wi-Fiaccess
eBNG
Unified: Service management Network management Policy management Reporting and analytics OSS and billing
AA
Per session policy and control
Per session monitoringand reporting
VoIP
Video
Streaming P2P
Web
File transfer
VPN access
Boosted App
AIM
Netflix
YouTube
Gaming
Voice
Subscriber
A
Subscriber
B
Video
Internet
Voice
Video
Internet
Execute
Desig
n
Monitor
BNG
eBNG
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Figure 11. Fair-share use and subscriber reedom: personalized plans
Premium content is blended into the Internet service so that the subscriber can access
it rom any device in the home or through a community broadband link. The service
provider oers this eature as an add-on to a basic metering plan. All content related
trac including the content itsel, the television guide and any related side-bar
content is identied by its application signature and is zero-rated (that is, not applied
against the subscribers cap).
Other selected applications, such as Facebook, are zero-rated or a nominal ee or
provided as a promotional incentive. OTT video applications such as Netfix are identi-
ed by their application signature and are metered.
Add-on eatures, such as unlimited Netfix o-peak, volume Netfix packages on-peakor guaranteed high-quality boost or a period o time, are used to either minimize OTT
trac concurrency at peak times or to monetize the fows.
OTT MONETIZATIONIn the previous section, the AA capability o the Alcatel-Lucent 7750 SR allowed popular
OTT applications such as Facebook and Netfix to be monetized or used or promotional
purposes through specialized metering, billing and QoS arrangements. This is only a rst
step in changing subscriber perception o the service provider as the provider o commodity
bandwidth to a provider o value-added services.
Service providers can extend the concepts and 7750 SR tools used to achieve personal-
ized plans to develop a whole range o new application services. Service providers can
work with content providers, advertising providers, application providers and retailers
to set up specialized monitoring and control o their applications and services in a way
that adds value to subscribers. New revenue can be generated through revenue-sharing
arrangements with OTT vendors.
Anywhereaccess
Basic plan(volume/speed)
AnywherePay TV content
Specialty apppackage
Prioritized*
Unlimited
Metered (at peak)
Unlimited (off-peak)
HD turbo (on-demand, unmetered)
Metered
Pay TV content
Netflix
Gaming, TV guide
Other
Voice
Residential
broadband
service
Video
Internet
Flexiblerecharge options
= + + + +
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Examples include increasing the QoE or specialty OTT online applications or monetizing
HTTP error redirection. With specialty OTT applications, the BNG can be used to identiy,
zero-rate or apply special treatment to trac fows as they traverse the IP network.
Subscribers can enjoy the reedom o high-quality p2p video or gaming without the
timing glitches that rustrate play today. In HTTP error redirection, AA can be used to
identiy and intercept erroneous page reerences in a URL issued by a subscriber. The
reerence is orwarded to an advertising partner who provides an alternative suggestion
or a ee and is then orwarded to the subscriber.
LOCATION FREEDOM: WI-FIGiven their high level o portability, it is no surprise that 30 percent o tablet usage (or
example, Apple iPAD) is now nomadic: its done at shopping malls, stadiums, hotels,
train stations and other congregation points. Customers with these portable computing
devices are now looking to replicate the home experience transparent access to all that
their residential provider has to oer outside the home.
For those with mobile subscriptions, the limited bandwidth o todays 3G data plans are
ar too punitive and restrictive to satisy their needs, and there is no link to their residen-tial services and content. While Wi-Fi hot-spots are popular alternatives, they come with
many problems and limitations, including:
No simple access: The customer needs to select access rom a list o cryptic service set
identiers.
No QoS guarantees: Perormance is variable with video quality that is oten
unwatchable.
No strong security: Lack o security opens up the device to security threats.
No service bundling: Wi-Fi hotspots are an added expense or the customer and a
missed opportunity or the service provider.
No unifed billing: This adds complexity or customer.
No my service everywhere: Wi-Fi is a not an extension o the residential
experience.
The WLAN capability on an Alcatel-Lucent 7750 SR allows residential broadband providers
to bundle Wi-Fi access as a revenue-generating option to residential service plans. The
WLAN gateway aggregates the Wi-Fi access points at Wi-Fi hotspots and transparently
orwards their connection requests to all the residential and business services oered on
the BNG.
Residential subscribers within range o their service providers Wi-Fi hotspots can trans-
parently connect to their service provider as i they were at home simply, securely, with
access to all their services and content and with a amiliar QoE. Transparent Wi-Fi accessallows residential broadband providers to oer subscribers reedom in the truest sense.
For service providers with both mobile and residential business units, the Wi-Fi access
inrastructure and WLAN gateway on the 7750 SR can also be used to transparently hand
o mobile data connections to the mobile data network. Mobile business units can realize
signicant reductions in radio network costs and operational complexity by transparently
moving data connections o the radio network to the Wi-Fi aggregation network whenever
a mobile handset is within range o a Wi-Fi hotspot. For the consumer, unlimited data
access through Wi-Fi encourages usage o the radio network and breeds customer loyalty.
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For service providers without a mobile business unit, excess capacity o the Wi-Fi aggre-
gation network can also be sold wholesale to mobile virtual network operators and other
mobile providers with a small radio ootprint. The WLAN capabilities on the 7750 SR
are summarized in Figure 12.
ENHANCED SERVICES
Enhanced IPTV
For many service providers, the rst step in enhanced video services with enhanced
BNG capabilities will start with IPTV. The Alcatel-Lucent 7750 SR supports multiple new
eatures that allow service providers to monetize and increase the quality o the IPTV
viewing experience:
PerectStream video conditioning: The BNG sends two copies o the IPTV stream and
uses inormation rom both to reconstruct a perect stream with the highest possible
quality in cases o data loss or corruption.
Industrys astest channel change: IPTV content is copied onto a running cache on
the BNG and orwarded to the subscriber when the channel is changed. This ensures
that the screen is not empty in the several seconds it may take to switch channels
when using the latest video compression ormats.
Retransmit on error or high QoE: The inormation in the above cache is used to
reconstruct the multicast stream in case o error. This process ensures high video
stream integrity.
IGMP-based intelligence gathering: Requests or video content are redirected and
stored to augment business intelligence. This allows service providers to better
monetize and tailor their services and advertising campaigns to subscribers.
Figure 12. New retail and wholesale revenue opportunities with Wi-Fi
Enterprise
Internet
eBNG
Residential
CDN
Hot spots
Copper
Fiber
Network and policy management
Wireline IP backbone
MVNO
IP services edge
Wirelessbusiness unit
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IGMP redirect with QoS adjust: Specic requests or video content can be redirected
to provide higher levels o service and increased QoS or higher-end subscribers.
Multiscreen IPTV: Providers can leverage the BNG to deliver their IPTV content
through multicast to the big-screen TV (through the set-top box) and through unicast
to any other device (through a home router). While this does not address unicast scale
issues, it is an excellent transitional step or service providers looking to provide device
reedom or their subscribers as they plan their CDN strategy.
Providers with IPTV services can leverage these 7750 SR eatures to continue generating
revenue and enhancing their oerings while preparing or a blended video experience
that brings in VoD and Internet content.
Evolving video services and CDNs
While linear TV will continue to grow in the oreseeable uture, subscribers are focking
to an on-demand (VoD) consumption model in greater numbers. Because VoD content is
delivered separately to each user, it cannot benet rom the eciencies o multicasting,
pushing the bandwidth requirements at centralized BRAS/video home oce (VHO) sites
to dozens o 100GigE ports by 2015. Service providers are aced with the dual challenge
o how to accommodate the unicast bandwidth onslaught and how to deliver a uniedservice that blends in IPTV and OTT VoD experiences and content.
A distributed architecture (see Figure 13) with a high-perormance BNG accomplishes
this in two ways:
ItprovidesthemassivescaleandperformancenecessarytoaccommodateVoD
bandwidth and enable IPTV/VoD convergence (see Alcatel-Lucent 7750 SR section).
ItallowsVelocixCDNcachingtobedeployedattheedgeofthenetworktooptimize
VoD delivery and eliminate QoS issues.
The introduction o a CDN moves the video streaming origin point and associated
bandwidth load rom centralized video servers to distributed caches in BNGs located
in Tier 1 and Tier 2 COs. The decision o what content to cache is based on dynamic
demand, with stale content fushed as demand popularity declines over time. The
Figure 13. Video service usion and optimized VoD delivery with distributed caching
Linear TVand VoDoriginservers
ExternalCDN ortransparentcache
Content partnerorigin servers
InternetSubscriber
Fixed access Wi-Fi access
IP services edge
Contentcache
eBNGPeercaches
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www.alcatellucent.com Alcatel, Lucent, Alcatel-Lucent and the Alcatel-Lucent logo are trademarks ofAlcatel-Lucent. All other trademarks are the property of their respective owners. The information presented
i bj t t h ith t ti Al t l L t ibilit f i i t i d h i
chain at stake. With todays centralized BRAS inrastructures requiring a major upgrade
to resolve end-o-lie issues and accommodate IPv6 migration, the time to migrate to the
7750 SR is now.
Figure 14. Extending reedom, service uniormity, simplifed operations and platorm re-use across
residential, mobile and business customers.
Enterprise or consumer
Freedom of broadband
without borders Freedom from cloud threats and opacity
Freedom to access anycontent, anywhere
Evolved BNG (eBNG)
Cloud-optimized VPN andbusiness Internet services
Universal wireless dataservices gateway
Fixed access Wi-Fi access
7750 SR IP services edge
VPN ANDCLOUD
WEB
VoD
LINEARTV
7750 SR
LTESmall Cells