Department of Information Technology Desktop Television Entertainment Video over the Campus Data...

Department of Information Technology

Desktop Television

Entertainment Video over the Campus Data Network

Tim Ward, NUIT

Telecommunications and Network Services


Outline• What has been deployed?

• Why deploy desktop TV?

• Northwestern campus infrastructure

• Deployment across the campus

• Future directions and next steps


What Has Been Deployed?NUTV Service

• 23 channels of entertainment television– Combination of off-air and

CATV channels• IP Multicast to all

undergraduate dormitories (4350 unique locations)

• MPEG2 encoding, 29.97 FPS, ~2Mbps per stream (128Kbps mono audio)

Internet 2 Multicast Service

• 2 channels CSPAN and CSPAN2

• IP Multicast to all of Internet 2• MPEG2 encoding

– CSPAN - 2 Mbps– CSPAN2 - 4 Mbps

•No client software installed on machine•Channel guide services – what’s on now and later?


Why Deploy This Type of System?• No CATV in student dormitory rooms

– Only in common areas/lounges

• Over 60 residence halls– Cost to wire with coax very high ($2-5Million)– Estimated time of completion: ~4 years

• CATV major issue for the student population


Chicago Researchand Education

Colocation

AADS NAPEvanston Campus

Dorms,Departments and

Administration

Dorms,Communication,

Journalism,Arts andSciences

ManagmentSchool

Chicago Campus

Medical School

Dorms, Arts andSciences, andAdministration


Administration

Law School,Management

Schol

Chicago Network CoreDorms, Departments and

Administration

University DataCenter


Administration

Engineering,Research Labsand Graduate

Housing

Education,Engineering

Gigabit Ethernet

ATM OC12ATM OC3

Fast Ethernet

Engineering, Arts andSciences

Main Library,Communication,

Journalism

Internet

STARTAP

RemoteSites

Abilene

Northwestern University Network

NSHEC

MREN

AmeritechAdvanced

Data ServicesNAP

StarLight

Gigabit Ethernet Mesh

EvanstonNetwork core

CoreRouter

CoreRouter

BandwidthManagment

RemoteSites

ATMSwitch

CoreRouter

BorderRouter

CISCOSYSTEMS


Campus CoreAnycast RP

SD

Catalyst 6500

CISCO YSTEMSS

SERIES

SDSERIESCatalyst 3500 XL

PWR

SD

Catalyst 6500

CISCO YSTEMSS

SERIES

SD

Catalyst 6500

CISCO YSTEMSS

SERIES

SD

Catalyst 6500

CISCO YSTEMSS

SERIES

SD

Catalyst 6500

CISCO YSTEMSS

SERIES

Commodity InternetInternet2


PWR


PWR

Northwestern University Campus Multicast

Gigabit Ethernet 2N Mesh Anycast RP in Campus Core Local Multicast Administrativly Scoped Second RP for Non-Administratively

Scoped Multicast PIM in Core,MBGP/MSDP at Border

Edge SwitchesEdge Router

Campus Border

Edge Router

Edge Router


System Components

CommercialCATV

Network

LaptopDVD tuner

DBS Dish

Antenna

MPEG2video files

CampusIP

Network

Workstation

DVD tuner

DVD tuner

Workstation

dvd player

Live Sources(un-encoded)

Recorded Sources(pre-encoded)

Video Encoding& Multicasting Systems

Encoding Server

Multicast-EnabledCampus Network

ProgramGuide

SubscriberManagement

System

Encoding Server

MPEG2video files

Viewers

set top box

iMac

Television

EncoderManagement

System

Computer

Encoding Server

Encoding Server


System Features• Live encoding of television• Additional pre-encoded video• Small footprint viewer software• Viewer downloaded as part of stream• Viewer available for multiple operating systems• http://www.videofurnace.com• Program guide for content labeling


Initial Testing Phase• Deployed 4 off-air channels• Deliver to well-supported residence halls• Get feedback on content and distribution from the

students• Tested for six weeks, followed by student vote on

service• One significant problem discovered in testing

phase


Full Deployment• Ramp up from 100 students to 4000

students in 3 weeks

• RA’s, Rescons, and new students first

• Clients for all Windows Platforms and Mac OS 9 initially

• Mac OS X and Intel Linux Clients now available


Operational Experiences• Test phase problem

– RP for multicast tree not distributed correctly

• Two deployment problems– IGMP snooping and CGMP fast leave

• Switch table flush occurs prior to router flush, causing a flood condition on all switch ports

– IP multicast TTL Threshold• Command causes all multicast packets to be route

processed


What’s Watched?

3rd WeekOn ABC

On Sunday

1000 Viewers


What Else is Watched?War with

Iraq(CNN)

Joe Millionaire

(FOX)


How Much is Watched?

2700 simultaneousViewers - differentchannels

700 viewersin first week


Keeping it Secure• Access Control

– Unicast – network allowed to get client?– Multicast – is the stream available on the network?

• Client to Server - License Transaction – Can I get a client?– Encrypted transaction

• Encrypted Streams – Can I watch this stream?– Key exchange for stream being watched– 128-bit key with a 64-bit block cipher


Demostration


Future Directions• Subscriber services (conditional access)• Client-controlled closed captioning• Set top boxes• Additional subscriber base

– Greek houses

– Graduate housing

• Other content sources– NU content; Law School, School of Communication


Questions?• http://www.northwestern.edu/nutv/

– Campus Multicast of 23 channels

• http://www.i2-multicast.northwestern.edu/– Internet 2 Multicast of CSPAN and CSPAN2

• [email protected]

Department of Information Technology Desktop Television Entertainment Video over the Campus Data...

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