Decongesting Student Broadband Networks of Over-the-Top ... · • Additional, devices accessing...

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Company Confidential. Distribution of this document

is not permitted without written authorization.

Providing sufficient bandwidth is an ongoing challenge

• Campus bandwidth increased proactively to meet academic needs

• ResNet bandwidth increased as funding available to meet student needs

University Internet bandwidth usage climbs about 25% to 50% per year

Internet peering costs are decreasing, however the “.Net

generation” is eradicating any service savings with

growing bandwidth requirements

• Higher quality content, popular applications, and new devices

are driving bandwidth—predominantly for non-educational

use—and will likely continue this trend over the next few years

• Gaming, social networking, media, file sharing and web

browsing applications consumed 78% of University Internet

bandwidth in a recent study

University IT Team Challenges

Source: Lancope – April 2010

Source: Palo Alto Networks - November 2009

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Students are accustomed to high-speed connections at home

• In my house we have Verizon FIOS – 25mb down, 15mb up

They also have numerous ways to eat up bandwidth

• Laptops / PCs

• Network connected DVD players and TVs

• Game Systems

• Slingbox

Students don’t watch TV anymore

• Daughter is a freshman in college and has not turned on her TV once this

year(except to play her Wii)

• Most of the time watches content on her Macbook

You are Looking at the Problem

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ResNet Bandwidth Drivers

HD Video Content

• Web-based high quality video (720p or higher) is available from many sources

driving 2 Mbps streams for long durations (ex. ESPN3 World Cup coverage)

File Sharing

• 24 P2P variants are actively being used driving over 20% of Internet

bandwidth on ResNets. New browser-based applications move large files

(like music or movies) looking like normal web traffic

Social Media

• The enhancements to social networking applications—making them

communications, media, and gaming hubs—is driving an ever-increasing

amount of bandwidth

Smartphones

• Additional, devices accessing the Internet in parallel (always-on secondary

connection) to laptops and desktops. WIFI offload capabilities means

content is delivered over university network, not a wireless service

provider’s

Source: Palo Alto Networks

Utilization Duration Frequency Concurrency

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Solution Requirements

Reduce year-over-year growth in Internet bandwidth demand and

associated budgetary increases for Internet access service

• Put demand more in line with planned capacity augmentation

Improve network capabilities for all applications and users

• Reduce network congestion, improve Quality of Service (QoS), and reduce

Help Desk complaints

• Address specific student complaints regarding Internet video-streaming

problems—and in general access to OTT content

• Address peak utilization times specifically—heavy non-educational use time

Ensure transparency to content providers and regulatory compliance

Compliment leading education and research opportunities with a superior

campus lifestyle

• Compelling student offer needs to address all facets of student life on campus

(including high-quality Internet access) to ensure competitive advantage

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What is Over-the-Top (OTT) Content?

• Any type of information sourced over a users’ broadband Internet

connection. Its most popular form is video, but is much broader than

video (although video is the most bandwidth-intensive) and includes:

― Flash video services, software updates, peer-to-peer, and HTTP downloads

What is Over-the-Top Content’s impact on Network Operators?

• Users utilize their Internet connection more

effectively and for a longer period of time

• Has a compound effect as linear-based requests

are aggregated, causing network congestion

• Puts significant stress on the network because it

must traverse internet connections, network

infrastructure, and the access network

Target: Over-the-Top Content

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Introducing Content Aware Networking

Content Aware Networking Value

• Addresses popular OTT content requests

• Lowers Internet access and connection costs

• Provides network users with a high Quality of Experience

• Realizes a rapid ROI compared to growing delivery costs

BTI Systems’ Implementation Value

• Offers an integrated solution—network and application awareness

• Operationally simple to deploy

• A network investment vs. an increasing CDN Service charge

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WideCast IntroductionBTI Systems’

99



BTI WideCast™ Solution Components

WideCast 200Integrated edge solution

packetVX™ 12/2With WideCast license

WideCast 300Data centre solution

Edge Optimized Linux OS

Transparent Cache Future

Future Open Platform CapabilitiesApplications

Operating System

WideCast Modules

Application Routing

& Content Aware

Switching

Solution Value: Network-integrated approach to efficient content delivery

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How Does it Work?Initial Request & Content Acquisition Procedure

WideCast Content Aware Networking solution is positioned in-line to

monitor user Internet requests

Applicable cacheable content opportunities go well beyond video

1 User Content Request

Internet

SubscriberOriginating

Server

Internet video services (YouTube, MSN Movies, Netflix)

Software updates (operating system and anti-virus)

Peer-to-peer file sharing (music, podcasts, movies)

HTTP downloads (user manuals, product brochures)

Cacheable Over-the-Top Content Examples

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WideCast identifies popular over-the-top (OTT) cacheable content types

• Key function in developing ―popular content‖ listing

Wire speed evaluation—latency intolerant and non-cacheable content

types bypass and continue along traditional internet connection path

2 Request analyzed

All Requests

Cacheable Content Request(Identified and logged)

Real-time Requests(VoIP, Email, …)

Application Awareness

Internet


Server

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Initial content request sourced via traditional internet connection from

the originating servers

• YouTube, Yahoo, Hulu, Netflix, iPlayer…

3 Requested from originating source

Internet


Server

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Content cached locally to address future requests

Content served to user in traditional sense from originating source

4 Requested delivered

and cached

Internet

Content

Served

Content CachedContent Stream

Content Acquired


Server

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How Does it Work?Subsequent Requests

Assumes cacheable/cached content request

1 User Content Request

Follow-on request process for previously requested content

Internet


Server

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Integrated solution functionality

Recognizes cacheable content request based on L4

2 Request redirected

Requests

Cacheable Content Request(Identified and logged)

Policy-based Redirect

Internet


Server

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Content Availability Check

• Uses first 4 MB of content file to provide ―fingerprint‖ for comparison—similar

to a content-addressable storage (CAS) solution, or an XOR function

3 Availability checked

Requests

Content Availability

Confirmed

Policy-based Redirect

Internet


Server

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Content Validity Check

• Hash-based analysis to ensure content is up-to-date, and has not been

removed from originating server

• Not URL-based


Server

Hash-based Validation Process

Content =Cached Original

4 Content validation

Internet

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Full IP Transparency – Unlike proxy server approaches

• Transparent to Content Providers - preserves application logic of all streaming

and download services and networks, and all collected subscriber information


Server

Internet

Application Analytics(# of views, likes, etc.)

Transparent Cache Content Delivery

Content Sourced

Locally

5 Requested content delivered

Content

Served

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Function Summary

WideCast Content Aware Network Solution

• Internet-destined requests are analyzed and classified; most

requested content is positioned locally

• For subsequent requests determine if the content is cached and

validate the integrity

• Content is sourced locally for network bandwidth savings and

improved use QoS

• Transparent to providers and users, and is regulatory compliant

Internet User

Improved

QOE

Bandwidth

Savings

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Content Aware Networking ValueFocus: Addressing OTT Content

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Addressing Popular OTT Content RequestsDriven by on-demand Video

0

1000

2000

3000

4000

5000

6000

7000

MP3 Youtube 3 minute video

iTunes feature-length movie

HD Movie (Netflix)

3MB 38MB

1500MB

6000MB

Content Transfer Requirements (MB)

Online Content Availability

Ubiquitous Device Access+

Video will account for 90%

of network traffic by 2012Cisco Visual Networking Index Forecast

YouTube 35% of traffic on

service provider networksNov 2009 Measurements

Subscribers require on-demand

video content access – any

device, anytime, anywhere

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0 1000 2000 3000 4000 5000 6000 7000

0.00 0.50 1.00 1.50 2.00 2.50 3.00

youtube.com

apple.com

mcafee.com

netflix.net

letour.fr

symantec live update

pandora.com

ut.us

farmville.com

2mdn.net

yimg.com

hulu.com

photobucket.com

xbox.com

frontierville.zynga.com

lds.org

directmessagelab1.com

adobe.com

turner.com

bigfishgames.com

Content Requests

GB served

Addressing Popular OTT Content RequestsBeyond Video

Repeated requests save

network bandwidth

Popular content types

addressed with solution

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Digital Millennium Copyright Act (USA)

DMCA Terms WideCast

The service provider is not the original source of the

material available

Fully Compliant

Caching is automatic, with intermediate and temporary

storage of content in local servers

Fully Compliant

The service provider does not modify the content Fully Compliant

The service provider complies with industry standards

regarding updating of the content

Fully Compliant

The service provider does not interfere with the content’s

access manners (passwords)

Fully Compliant

The service provider must remove infringing files upon

gaining actual knowledge of the infringement

Fully Compliant

DMCA: Digital Millennium Copyright Act – USA: Caching P2P and HTTP-streaming content for the purpose of network efficiency and without modification is legal and protected by law

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Content Aware NetworkingCampus and RON positioning examples

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DistributionCampusAccessInternet POP Building User

WideCast Positioning in Campus/RONsCore Deployment

Positioned at GigaPOP or head end campus data center

• Address ResNet and student access network from one location

• ISP Savings: Reduced access + usage with local OTT cache

• Subscriber QoE: Improved with local source (vs. Internet sourced requests)

Access Methods

Wired

“Port per bed”

WIFI

Mobile

WIFI Offload

Campus-wide user population: ~2500-20000

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WideCast Positioning in Campus/RONsEdge Deployment

Positioned at high-subscriber count facilities (dorms)

• Address ResNet student access network bandwidth at the source

• Campus Network Savings: Reduce impact of traffic end-to-end

• ISP Savings: Reduced access + usage

• Subscriber QoE: Improved with “at the door” source (vs. Internet sourced)

DistributionCampusAccessInternet POP Building User

Access Methods

Wired

“Port per bed”

WIFI

Mobile

WIFI Offload

Edge facility user population: ~2000+

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Content Aware Networking ValueUniversity ResNet Campus Deployment

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Case Study ExampleMajor North American University

The Challenge

ResNet’s 7500 users were consuming a

disproportionate amount of Internet bandwidth

Driving 100% year-over-year growth of non-

educational Internet access bandwidth

Campus and internet access infrastructure

congested, low QoS, bandwidth costs growing

rapidly

Call center complaints of poor performance

increasing in frequency

The Network

Mix of on-campus and off-campus residence

facilities; wireless APs for user access

GbE link between residence and campus data center

Internet access link: 400MDistributionCampus

Residences

Data

Center

Off-

Campus

Residences

Internet

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Primary Objectives

Control bandwidth costs

Provide ResNet users with a high-quality Internet

experience; lessen Call Center complains

Analysis Criteria

Minimum 25% request redirection to cache

Improved QoS measured by data throughput

Transparency to content providers and users

Integrate easily into existing campus network

>25%

Requests redirected Bandwidth ServedTransparency

Easy IntegrationInternet video

OS/Antiviral updates

Peer-to-peer traffic

HTTP downloads

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The Results

Reduced network and internet access bandwidth

requirements on average by ~30%; peak

consumption reduction by ~43%

Streaming Internet video content delivery

accelerated by 4x to 8x; rapid user control response

Over 90% of ResNet users benefit from transparent

caching solution some content requests sourced

Transparent solution, does not interfere with

application or service analytics (pay-per-click, peer

ratings, conditional access) no regulatory

compliance issues

Ongoing increased cache efficiency and in-depth

traffic trending capabilities enable improved

bandwidth and network planning

Bandwidth: Required Generated

Overall

Average

165 Mbps 50 Mbps

(~30%)

Maximum

Results

318 Mbps 137 Mbps

(~43%)

Time

Period

IP Addresses

Seen Served % Served

Last 60m 3877 1653 43%

Last 24h 8285 7018 85%

Since Start 13062 12238 94%

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Realize network and Internet access savings Network Operator Measured Value

Results

20-30% peak bandwidth savings (Internet sourced vs. subscriber delivered)

• Defers network capacity upgrades (aggregation/middle mile, and core)

Up to 35% cost savings on cacheable backhaul bandwidth

Bandwidth Delivered

Bandwidth Incoming

Key Factors

Cache Productivity – the difference between aggregate bandwidth delivered (to

subscribers) relative to bandwidth required to source ―new‖ content

ISP Transit Peering Costs – a reduction in charged bandwidth to access the Internet

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Provide network users with a high QoESubscriber Value

Results

7.1 times improvement in end user throughput for Cached Media

Rapid content download, instantaneous responsiveness to user commands

Eliminates complaints to support center regarding suboptimal quality

“The improvement users report in terms

of network performance and

reduced call center volume, far exceeds

what would be expected just looking

at the bandwidth saved or generated.”

Cache Throughput

Transit Throughput

Key Factor

Quality of Experience (QoE) – an improved QoE with respect to download

time/buffering and command control response (play/pause/fast forward)

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