Headend Deployment Strategy
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- Jonah Townsend
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1 White Paper Headed Deploymet Strategy This paper describes the flow of the live cotet delivery from the Headed to the customer premise equipmet. It also highlights the major issues ecoutered i desigig a IPTV Headed ad discusses the implemetatio of Headed for a variety of itegratio scearios. The paper elaborates o TCS s expertise to provide a Headed solutio ad the various decisio poits that will eable the service provider iaugurate the delivery of IPTV services. With a cotiuously chagig busiess sceario i the TV market, Telco s are lookig to purchase or develop cuttig edge solutios to remai competitive ad brig dow the cost of operatio. As IPTV s accessibility depeds o the etwork techology, the etwork architecture used to deploy IPTV is vital. Cotet delivery requires badwidth ad performace, ot oly i the last mile (the access etwork), but also i the edge, core of the etwork ad i the customer premises. The IPTV referece architecture is a model desiged by the TCS IPTV team for Headed deploymet. This model provides the framework to overcome the challeges ecoutered for deployig the IPTV solutio. The referece architecture model goes beyod system itegratio by creatig stadards for flow of busiess evets ad processes from oe applicatio to aother. The Headed deploymet strategy suggested i this paper will help Telco s i establishig a commo view of the complex busiess etities, rocesses, ad challeges that they could come across i the IPTV deploymet.
2 About the Author Sajay Ferro Sajay Ferro has bee workig with TCS sice Sajay holds a Bachelors degree i Electroic Egieerig ad a post graduate i Busiess Admiistratio. Sajay has several years of experiece i Televisio ad Broadcastig systems, Wire-lie/Wireless Telecommuicatio, IT ad Networkig, Istallatio ad testig of trasmissio equipmets. Sajay as a IPTV Solutio Architect ad as a part of TCS IPTV iitiative has desiged various referece architectural models i the IPTV ed-to-ed gamut. Sajay is also developig various assets i the IPTV space. Additioally, he has experiece i maagig various cosultig egagemets. 2
3 Table of Cotets 1. Itroductio To IPTV 4 2. Overview of IPTV Headed 4 Cotet Acquisitio ad Compressio System 5 Middleware System 6 VODSystem 6 DRM System 6 OSS/BSS 6 HMS Ad Moitorig 6 3. A Bird s Eye vew of the IPTV Compoets 7 4. Challeges i a IPTV Headed Deploymet 7 5. Quality of Experiece 8 6. TCS s Capability I IPTV Busiess 9 TCS s Headed Deploymet Services Deliverables 10 Cosultig 10 Project Maagemet 10 Executio of Project Pla 10 Procuremet Process 10 Architecture ad Desig 10 Cotract Maagemet 10 Chage Maagemet 10 Coclusio 11 3
4 Itroductio to IPTV Televisio is called as the 75-year-old killer applicatio. Iteret Protocol Televisio (IPTV) is a digital televisio service distributed usig IP etwork. Here IP etwork is predomiatly the same kid of etwork that we use to surf the iteret ad sed s. IPTV delivers ehaced video applicatios over a maaged or dedicated etwork to the TV through broadbad coectio. IPTV also capitalizes o the two way ature of the IP etwork by providig a uprecedeted iteractive medium for subscribers. I veracity, a IP etwork ca deliver much more tha televisio chaels. Usig IPTV etwork techology, a service provider ca easily distribute terrestrial, radio ad live satellite chaels, digital videos o demad ad other value added services such as Video coferecig, TV chat, TV mail, Games, TV bakig, Remiders, Iteret browsig o TV ad may more value added services through the etwork ifrastructure. IPTV techology eables service providers to deliver ulimited cotet ad fuctioality that has ot bee available previously o TV. Overview of IPTV Headed WithHeaded is a master facility for receivig televisio sigals for processig ad redistributio over a televisio service provider s etwork. Most chaels are delivered to the Headed through satellite. The chael broadcaster modulates ad trasmits the sigal to a satellite i geosychroous orbit from a uplik facility (Satellites that orbit the earth's path are at a fixed positio some 22,300 miles above the surface of the earth). The satellite the retrasmits the sigal back to dish ateas, which are istalled at the service provider s Headed site. The sigal received by the parabolic surface of the atea is redirected to the feed system ad to the low oise block coverter (LNB) of the dish atea. The LNB that resides o top of the feed hor amplifies the sigals ad delivers them to the Headed through a coaxial cable. Broadcasters scramble ad ecrypt most of the trasmitted satellite sigals. Satellite receivers istalled i the Headed decode these satellite sigals usig a smart card that the broadcasters provide. The satellite Itegrated Receiver ad Decoder (IRD) have the ability to decode or decrypt the scramblig of a particular format or type of sigal built i IRD. The satellite receiver typically coverts the sigal to a base bad audio ad video sigal or to a Serial Digital Iterface (SDI) stream. This sigal is further the compressed usig a ecoder. After ecodig, each chael is ecapsulated ito IP ad set through the etwork. The compressed sigal could be ecrypted with a Digital Rights Maagemet (DRM) techology. The sigal is the streamed to the customer s Set-top Box (STB) through the etwork ifrastructure of the televisio service provider. The STB the decodes the available stream. The subscribers fially view the decoded cotet o the televisio that is coected to the STB. 4
5 Geerally, it is perceived to have multiple Headeds to deliver video services through a IP etwork cosiderig the extet of persoalizatio required i IPTV. To fulfill miimum Quality of Service (QoS) requiremets, a sigle Super Headed will ot suffice uless the service provider has huge badwidth capability to deliver IPTV services through the etwork If visualized broadly, the distace from oe part of the State/Coutry to the other is i the rage of few thousads of kilometers with log-haul udergroud optical fiber etworks coectig them for telecommuicatio purposes. These cables are proe to multiple cuts at sporadic itervals, sometimes eve requirig 24 hours for the splicig process to get the etwork back ruig. If there is oly oe Super Headed servig the etire State/Coutry, the ay damage to the optical fiber will isolate the regio ad affect the services of the regio. Moreover, the required badwidth to coect the differet parts of the State/Coutry with a sigle Super Headed will be huge ad ay problem i the etwork will seriously hamper the ed-user experiece. A distributed Headed architecture is ideal i this situatio. Here, idividual Headeds will have their ow compressio system eablig broadcast of a particular chael list caterig to the regioal market segmet. These Headeds will also host regioal Video o Demad (VoD) servers housig the local cotet ad localized advertisemets. The Middleware ad Value Added Services (VAS) applicatio servers will also be decetralized to cater to localized applicatios. The decetralized Headed architecture may be adopted by large Tier 1 Telcos that serves the etire Coutry/States withi the coutry. Whereas Telcos/MSO who target specific regio with these services will prefer a Super Headed servig that regio. IPTV Headed System comprises of the followig major elemets: Cotet Acquisitio ad Compressio System Middleware System VoD System DRM System OSS/BSS HMS ad Moitorig Cotet Acquisitio ad Compressio System Cotet acquired from the broadcasters ad cotet distributors will be aggregated at the Headed locatio for coditioig, repurposig ad retrasmittig the broadcast sigal through the etwork ifrastructure of the service provider. The compressio system built i the Headed will trasmit the compressed sigal with ehaced compressio techique based o the etwork requiremets of the service provider. The compressio system cosists of the Dish Atea farm, L-bad system, power dividers, satellite receivers, IRD's, SDI/AV routers ad ecoders. 5
6 Middleware System IPTV middleware acts as the cetral system that cotrols the iteractio of IPTV compoets from the Headed to the set-top boxes at the subscriber premises. The middleware system offers subscribers a rich, reliable ad persoalized viewig experiece o their televisio sets for broadcast ad o-demad services. The IPTV middleware is itegrated with OSS/BSS through APIs to eable creatig services, provisioig ad billig. The middleware system supports the followig major fuctioalities: User autheticatio ad authorizatio DRM Billig ad Mediatio Maagemet iterfaces for users, services, chaels, packages ad programs EPG Maagemet Subscriptio Maagemet Broadcast TV, Video-o-Demad, Persoal Video Recordig ad iteractive services Service statistics VoD System VoD ( Video o Demad) eables subscribers to view the movie cotet of their choice through a oscree movie guide ad thereby also cotrol the streamig sessios with VCR-like fuctios such as stop, pause, fast-forward ad rewid. This service also gives subscribers the liberty to view the movie as per their leisure time. DRM System DRM (Digital Rights Maagemet) techology ca restrict user s access to live chaels, movies, music, ad literature, ideed all forms of digital data. It is primarily used for autheticatio of subscribers. DRM ca support a richer set of busiess rules that ca be implemeted because of a wide variety of services that IP etworks support ad also the bi-directioal ature of IPTV etworks. OSS/BSS The OSS/BSS has a vital role to play i the customer databases as all subscriber iformatio is defied withi this system. This system ot oly defies ad moitors the customer activity but also keeps track of all billig module defied for each ad every subscriber. The system is desiged i such a maer that it provides ope iterfaces for itegratio with high-level cetralized billig systems ad other maagemet platforms. The evet detail records (EDR) geerated by the middleware are set to the mediatio system of the billig system where they are processed ad rated. The cotet packagig ad pricig iformatio is delivered ito the billig system through the middleware APIs. HMS ad Moitorig The Headed/etwork maagemet system (HMS) moitors ad cofigures all active equipmets of the Headed ad Network. The HMS supports the operatio, cofiguratio ad redudacy of all the Headed compoets. 6
7 A Bird s Eye View of the IPTV Compoets The followig architectural layout depicts the compoets that could build up the eco system of a edto-ed IPTV deploymet. This referece architecture is a high-level overview ad, i reality, may IPTV subsystems ad vedor specific architectures are required to make each icaratio of IPTV uique ad of varyig complexity. Figure 1: IPTV Referece Architecture TCS's IPTV Strategic Iitiative team has created a referece IPTV deploymet architecture module. This referece module offers a complete rage of IPTV services that meets the requiremets of Tier I, II ad III Telecom service providers who wat to pursue the IPTV busiess. The referece module eables service providers to develop a ew ad uique solutio to differetiate offerigs from their competitors. Challeges i a IPTV Headed Deploymet The challege i a IPTV Headed deploymet is to obtai the highest quality video i the lowest etwork badwidth. Popular video compressio techiques such as Flash, MPEG-2, ad H.263 have bee surpassed by the ewer H.264 stadard, which has 2 to 3 times more compressio capabilities. Also, IPTV etwork operators eed to esure reliability, availability; flexibility ad quality of service to gai a competitive. 7
8 Other challeges i deployig IPTV Headed are as follows: Itegrate differet vedor products ad maage/moitor the compoets with a sigle Headed Maagemet system (that is, Multi-compoet Iteroperability). Reduce the chael zap time while switchig differet chaels. Migrate pre-deployed Headed compoets from MPEG-2 to MPEG-4 AVC. Cost-effectively deliver video services over service provider s curret DSL etworks (that is, Network ad Ifrastructure Readiess). Maage the etwork badwidth. Overcome barriers that DSL providers face i supportig video applicatios protocols while upgradig their curret etwork ifrastructure. Deliver services i a more proficiet, reliable, flexible maer desiged o ope stadards. Quality of Experiece To create the televisio experiece that viewers are accustomed to, the etwork ifrastructure must provide a delivery medium that is free from glitches, lockups, dropouts ad other problems. This could be accomplished by esurig that the etwork is desiged ad scaled i such a maer that there is sufficiet badwidth availability ad distiguished ability to hadle the services for the broadcast-quality streamig video. Quality of Experiece (QoE) is the suitability of a applicatio or service as perceived subjectively by the eduser. QoE plays a essetial role i the marketplace success of IPTV services ad is expected to be a key differetiator with respect to other competig service offerigs. Subscribers to etwork services do ot care how service quality is achieved, what matters to them is how well a service meets their expectatios for effectiveess, operability, availability, ad ease of use. To esure timely delivery of IP packets, QoE is critical. Various exclusive features may attract cosumers, but video quality is a must to sustai customer loyalty. QoE is a evolutioary step take which is required beyod Quality of Service (QoS). It icorporates importat elemets such as maximum delays i trasport of IP streams ad miimizes the differece betwee trasport times for idividual IP packets (jitter). QoE also icludes a decisive factor for miimum dowtimes ad maiteace itervals, providig reasoable chael chage times, ad guarateeig availability of o-demad services, iteractivity, ad delivery of etworkbased services such as time-shifted viewig with VCR-like fuctioality. To meet viewer expectatios for highquality services, QoE must be sustaied across the etire IPTV architecture, from cotet source through delivery to multiple devices util the customer home. This level of cotrollability ad diagostic capability requires a maagemet protocol that exteds beyod service provider access to devices used by the customer. 8
9 TCS s Capability i IPTV Busiess TCS's IPTV Strategic Iitiative team has developed a approach to cater differet requiremets of Telecom Service providers who wat to pursue the IPTV busiess. The approach broadly categorizes four key areas amely Network, Cotet, OSS/BSS ad VAS. The followig decisio poits reclie uder these areas to help service providers iaugurate delivery of IPTV service i a icreasigly secure, scalable ad cost effective maer. Network Levels of ivestmet Access etwork readiess Choice of STB Middleware itegratio Network plaig ad desig Network testig Time to market for lauch Cotet Cotet Maagemet strategies Compressio Techologies DRM Meta data maagemet Cotet delivery etwork (CDN) plaig ad commissioig CDN testig Targeted advertisig Cotet maagemet process ad solutio Media asset maagemet process ad solutio STB testig ad support OSS/BSS Cotet acquisitio ad maagemet Cotet billig Service assurace QoE moitorig SLA Maagemet Real time fulfillmet Assurace/Billig Busiess itelligece o viewig patters Itegratio ad testig Reveue assurace 9
10 VAS Applicatio busiess case developmet Proof of cocept Time to market Testig Life cycle maagemet 6.1 TCS s Headed Deploymet Services Deliverables The service deliverables for the Headed deploymet are as follows. Cosultig A cosultat will assess the etwork ad systems readiess, develop a roadmap for readiess ad system ratioalizatio strategies, ad develop cotet ad parter strategies. Project Maagemet A TCS Project maager will be available at the customer s site to pla, coordiate, ad maage deploymet activities durig all phases of the project. The Project Maager will have a exclusive role ad will be dedicated durig the executio of the project. Executio of Project Pla TCS will prepare a detailed executio pla based o the uderstadig of the requiremets for the Headed deploymet. The project pla will also track all the milestoes, tasks, ad depedecies for the project. Procuremet Process TCS will implemet a detailed phase-by-phase Headed compoet procurig process, which would track the procuremet ad delivery of materials. Architecture ad Desig TCS will pla ad prepare the architectural flow of the Headed, create chassis layouts, develop rack elevatios ad wirig schematics, create fial bill of materials (BOM), ad determie demarcatio ad test poits. Cotract Maagemet Cotract maagemet procedures will provide a framework to oversee implemetatio of the cotract, address the required cotract chages ad provide a mechaism to maage disputes. Chage Maagemet Chage Maagemet will maage the modificatios to the desig, BOM, schedule, scope, budget, ad deliverables of project. 10
11 Risk Admiistratio Risk Admiistratio will maage the risks associated with the project, aalyze major risks ad suggest mitigatio plas, ad maage escalatio as ecessary. Relatioship Maagemet Relatioship maagemet ivolves idetifyig the shared visio of the egagemet, idetifyig value creatio opportuities, moitorig adherece to the set goals ad mitigatig risks. Escalatio Maagemet Critical issues that are ot resolved i the required timeframe will be escalated to the Project maagemet chai to esure quick resolutio. Osite Istallatio TCS will istall the Headed compoets osite ad perform fial cablig ad wire-listig. Cofiguratio ad Commissioig TCS will cofigure idividual devices ad perform performace aalysis o the commissioed compoets esurig efficiet performace of the system stability of the compoets. Acceptace Testig TCS will perform system testig usig a proposed test pla with the service provider s participatio for fial acceptace. Hadover of the site TCS will trai ad arrage kowledge trasfer sessios for the persoel assiged by the service provider. The traiig will cover the fuctioal ad techical aspects for the solutio deploymet at the customer site. Coclusio Digital cotet, oce produced, ca be delivered through a arbitrary digital trasmissio system to a arbitrary cosumer device. However, the key cocer is to deploy Headed architectures that are more proficiet, reliable, ad flexible based o ope stadards. TCS will exted its efforts beyod the traditioal value chai to develop ad deploy IPTV solutios for customers across the world. TCS's IPTV Strategic Iitiative team has leveraged its experiece i the IPTV domai ad has formulated a approach to deliver the best possible service to meet the cliet s busiess eeds withi the agreed resource levels, that is, a service that is professioal, cost effective ad with risks that ca be uderstood ad maaged. 11
12 About TCS IPTV Strategic Iitiative Group TCS' IPTV Strategic Iitiative has bee at the forefrot to drive the ew wave of Telco ad Cable busiess through IPTV services with the objective to be a trusted parter i deliverig IPTV solutios that are efficiet (value for moey) ad effective (meet the busiess eed with built i futurity). TCS IPTV offerigs are categorized ito the key fuctioal domais of Network, Cotet, OSS/BSS ad VAS, ad spread across the etire spectrum of services from cosultig to IT services to BPO. TCS has ivested i a IPTV Lab i Hyderabad, which is fully equipped with facilities to trai, demostrate ad braistorm. The team focuses o buildig assets ad alliaces, executig projects ad traiig people to serve multiple customers across the globe Cotact For more iformatio, cotact global.telecom@tcs.com Subscribe to TCS White Papers TCS.com RSS: Feedburer: About Tata Cosultacy Services (TCS) Tata Cosultacy Services is a IT services, cosultig ad busiess solutios orgaizatio that delivers real results to global busiess, esurig a level of certaity o other firm ca match. TCS offers a cosultig-led, itegrated portfolio of IT ad IT-eabled ifrastructure, egieerig TM ad assurace services. This is delivered through its uique Global Network Delivery Model, recogized as the bechmark of excellece i software developmet. A part of the Tata Group, Idia s largest idustrial coglomerate, TCS has a global footprit ad is listed o the Natioal Stock Exchage ad Bombay Stock Exchage i Idia. For more iformatio, visit us at IT Services Busiess Solutios Outsourcig All cotet / iformatio preset here is the exclusive property of Tata Cosultacy Services Limited (TCS). The cotet / iformatio cotaied here is correct at the time of publishig. No material from here may be copied, modified, reproduced, republished, uploaded, trasmitted, posted or distributed i ay form without prior writte permissio from TCS. Uauthorized use of the cotet / iformatio appearig here may violate copyright, trademark ad other applicable laws, ad could result i crimial or civil pealties. Copyright 2011 Tata Cosultacy Services Limited TCS Desig Services I M I 07 I 11
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