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Evolving the TV experience: Anytime, anywhere, any device
 

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    Evolving the TV experience: Anytime, anywhere, any device Evolving the TV experience: Anytime, anywhere, any device Document Transcript

    • Evolving the TV experience: Anytime, anywhere, any device Torbjörn Cagenius, Andreas Fasbender, Johan Hjelm, Uwe Horn, Ignacio Más Ivars and Niclas Selberg Broad deployment of broadband access infrastructure and pressure on eras at a sporting event or reality game show. telecommunications operators to exploit new business potential are driv- Clearly, the role of mobile devices will ing up interest in IPTV. However, in order to meet the ambitious expecta- become increasingly more prominent in a tions, IPTV must quickly evolve into a personalized, interactive application world of personalized, interactive IPTV. that is well integrated with communication services and has inherent sup- Numerous cellular network operators have port for portable and mobile devices. already launched mobile TV services, and The requirements for personalized, interactive IPTV are best addressed the deployment of mobile broadband access by a solution based on IMS. Because IMS already provides an open, (HSPA) as well as the introduction of mobile broadcast technology (MBMS) will supply IP-based framework for voice and multimedia communication services the capacity that is required for excellent- across fixed and mobile devices, only minor extensions are necessary for quality delivery of mobile TV services over integrating media services. cellular networks.1-2 The authors describe Ericsson’s approach toward a personalized, Apart from consuming TV content, us- interactive IPTV solution based on IMS. They also discuss standardization ers will be able to use their mobile devices activities and highlight areas where more work is needed. in many different ways, for instance, to con- trol their IPTV services when they are on the move or for sharing personal content in a TV Personalized, interactive The increasing popularity of SMS-based program. voting and chat services in TV programs The use of a common control framework IPTV – meeting future points to strong business opportunities in for fixed and mobile devices opens the door needs the area of interactive services. Enabled by to many new possibilities, including session the bidirectional nature of the transport sys- portability between fixed and mobile devic- The transition from analog to digital TV tem, interactivity will give content provid- es. This means that if a user, “Maria”, begins standards is in full swing around the world. ers simple interfaces that allow users to vote, watching a TV program at home but must Efficient video compression and broad de- shop, access background information, and step out, she can either transfer the TV ses- ployment of broadband access allow telecom- publish content to a program. sion to, or reconnect to the service from, a munications operators to complement IP Personalization and interactivity will enable mobile phone once she is, say, seated on a bus telephony and internet services with IPTV TV service providers to increase the appeal of (Figure 1). offerings. However, the anticipated consum- advertisements, and permit users to dynami- But this is only the beginning. The seam- er, operator, and service-provider demand cally select camera angles from a pool of cam- less integration of TV, communication, and will require features that go beyond what IPTV is able to deliver today. Consumers, for example, increasingly want personalized me- dia services, anytime, anywhere, and on any Figure 1 device. Operators want to seamlessly com- Maria transfers the TV program she is watching at home to her mobile phone. bine TV with internet and communication services. And content providers are looking for new revenue opportunities from inter- Coming up next, But first active services. They also want to mine the “American Idol” menu I'll transfer this show to my phone consumer feedback loop enabled by IP-based TV to mobile? content distribution. yes no Personalization and interactivity Consumers want greater control over TV Uh oh, I need services and delivered content. Personaliza- to run or I’ll miss tion will enable them to customize TV and my bus video-on-demand (VoD) packages according to individual preferences and to exert greater control over channel content as well as when Oh look, it’s Tony! children, for example, may access it. [sigh] Oh, Tony... Personalized user interfaces will present You’re so cute! customized channel selections, much in the same way as bookmarks in a web browser, and pre-scan electronic programming guides (EPG) for content that matches user inter- ests. These capabilities improve usability by reducing the time a user must spend zapping through channel lists. Ericsson Review No. 3, 2006 107
    • Look! Bingo is on. After ordering tickets and playing a while pay-per-view perspective from Alonso’s cock- Here, Marco, take my phone and order us some cards Tic 3 kets pit, which for a small additional charge, he can share with his friends. Luigi and Andrea Okay! are quick to accept his invitation to incorpo- rate this picture-in-picture (PIP) feature. Your tickets I'll order one for each of us. Home networking ...twentyfour and BINGO! Strategy Analytics states “the most signifi- Ope rato r We have a winner, folks. Luigi, do you want to join us via your camera? cant home technology trend of the next five Your The Mon thly ngo. Bill. .....1 2S years will be the ability of fixed and portable ttobi 3 Lo devices to exchange media with each other DADDY!! over a multimedia home network.” 4 I think he’s talking to us... Sony’s LocationFree concept, which is one example of this trend, aims at making con- What do you say? tent from different sources (for example, live Look, Dad, We’re on TV! TV channels, DVD, and DVR) available on different devices (large-screen TVs, PCs, lap- tops, portable players, and so forth) and at Okay, the CONGRATULATIONS! different locations.5 camera is ready You have just won EUR 1 million and a brand-new SonyEricsson mobile phone! Forums such as the Digital Living Net- work Alliance (DLNA, Box A) are working on guidelines and specifications to guarantee interoperability between consumer devices Figure 2 from different vendors in a networked home IMS-based IPTV solutions enable service blending and fixed-mobile convergence. environment.6 internet services facilitates the combination This multi-user multimedia experience of services and fixed-mobile convergence, also introduces new kinds of social inter- IMS-based personalized, which will enable even more exciting sce- action. Later in the evening, for example, narios.3 Luigi settles down in front of the TV to interactive IPTV In Figure 2, for example, we see how watch Formula 1 racing. To make the most Personalization, interactivity, combined ser- Maria’s family has gathered to watch and par- of the experience, he logs in with his personal vices, and fixed-mobile convergence can be ticipate in a popular, interactive game show: profile. As the race gets underway, a small achieved in several ways, but to succeed in “Bingo.” Maria’s son (Marco) uses his father’s window opens on Luigi’s screen, displaying stimulating new services and in guarantee- (Luigi) phone to buy some bingo cards. the position of all the cars via a graphical ing interoperability between technologies, The price of the cards is charged to Luigi’s representation of the racetrack. At the same the industry must agree on one approach monthly bill. As the show progresses and time, a presence module indicates that Luigi’s that is based on open standards and inter- numbers are drawn, the cards are updated in friends, Mauro and Andrea, are online. Luigi faces. The most promising approach is to use real time. Today is Marco’s lucky day – he opens a voice session with his friends to com- an IMS framework7-8: drew the winning card! A request pops up ment on the race. A moment later, in a dar- • IMS-enabled IPTV uses the session initia- on their mobile phone, asking if they want to ing move, Fernando Alonso overtakes Kimi tion protocol (SIP), which provides a uni- establish a live video call. Marco accepts and Raikkonen, triggering a chorus of cheers in fied control scheme that can be used to jumps for joy at seeing himself on TV. the voice channel. Mauro’s profile includes a control all types of media sessions as well as application services. It thus supports com- bined services and interactivity by joining different communications paradigms into BOX A, DLNA a complete multimedia user experience. The Digital Network Living Alliance is an industry forum founded in 2003 by leading manufactur- • From the outset, IMS was designed to ers of consumer electronics, mobile phones and personal computers. As of September 2006 it provide a personal communication in- had more than 250 member companies. DLNA compliance is quickly becoming one of the most frastructure with group communication, important features for home and mobile-networked appliances. thus transforming the TV experience from The vision calls for a seamless environment that enables users to share digital media within the home and while they are on the move. Examples of digital media are personal content, packaged a personal, private domain to a socially in- media, and broadcast content. teractive experience. Communication and TV services can share IMS enablers, such DLNA has published home device design guidelines based on as presence, instant messaging, and profile • prevailing networking standards, such as UPnP, HTTP, IP and IEEE 802.x; and management. In particular, presence and • dominating content formats, such as JPEG, MPEG2 and LPCM. A variety of DLNA-certified products have already been launched. DLNA is now working on profile management will form the basis of Phase-2 guidelines which put greater focus on IPTV and use cases beyond the home. new personalized IPTV experiences. 108 Ericsson Review No. 3, 2006
    • • The ability of IMS to deliver combined Client environment IMS application servers Service delivery services enables the seamless integration of platform (SDP) IPTV Other TV, communication, and internet services. application server application servers Business support IPTV IPTV This will create a more convenient and at- application application center tractive experience. • IMS-based IPTV also inherits all the ca- IMS enablers PGM IMSM SDS pabilities of IMS for service roaming, thus DRM linking the IPTV experience to a user pro- Authentication Authorization file, not a device as with traditional set-top HSS ESG SIP QoS boxes. The IPTV experience can then be client control IMS Content core delivered to any device in any network in ISIM CSCF mgmt IMS the IMS domain. The access-agnostic na- UA ture of the IMS control layer is an impor- Media client MRFC MRFP Charging Server tant prerequisite for fixed-mobile conver- HIGA provider support IMS common system gence. Resi- functions • IMS is an open standard supported by all Home network dental gate- major telecommunications operators. way Broadband access Backbone Figure 3 gives a high-level view of an IMS- Local head network O&M end based personalized IPTV architecture. The Radio Mobile support functions architecture consists of a client environment, access network core net- work Central head IMS application servers, IMS common sys- Transport layer end tem, and transport layer. The service delivery New components Shared functions provided by IMS Shared functions provided by service delivery platform platform (SDP) offers a standardized set of support functions that can be shared among various service components. Figure 3. IMS-based IPTV architecture for combined services and fixed-mobile convergence. Client environment The main functional blocks in the client environment of the consumer premises net- work are the IPTV application, other appli- terworking between IMS and non-IMS con- TV services are presence and group manage- cations (for instance, for combinational IMS sumer devices (Box B, Figure 4).9 ment (PGM), and IMS messaging (IMSM). services), media client, SIP client, and IMS At GlobalComm 2006, Ericsson and Sony Presence and group management enables user agent (IMS UA). jointly demonstrated the consumer benefits applications to consider presence informa- The IPTV application is responsible for all of DLNA/IMS interworking. The demon- tion and group membership, for instance, by interaction between IPTV services and users stration showed how users can wirelessly drawing on a user’s buddy list when person- on their end devices, for instance, a set-top view digital photos stored in mobile phones alizing a service – as was done, for instance, box, TV, PC, or mobile phone. The end device on a TV, use a home gateway for instant for Luigi, Mauro and Andrea. also hosts the media client, which receives messaging between mobile phones outside The IMS core provides a control layer that and decodes the video and audio streams that the home and a TV, and access content stored controls services provided over fixed and mo- make up the digital TV signals. on a home PC via a mobile phone. The com- bile access networks. Each IMS application, such as IPTV, bination of technologies based on IMS and The home subscriber server (HSS) provides voice, instant messaging, or video confer- DLNA standards will enable users to access a master database for user data and service encing, contains a SIP user agent (SIP UA) digital media anywhere and any time. profiles in IMS. It contains subscription- that terminates SIP services in the client en- related information that network entities vironment. Depending on the application, IMS application servers need in order to handle calls/sessions, and consumer devices will be required to sup- The IPTV application server (IPTV AS), provides support for user security, authoriza- port specific hardware, such as a camera or which is the central control point of the IPTV tion, mobility management, roaming, and so microphone. service, manages all IPTV-specific functions on. The HSS is enhanced for the IPTV ser- SIP user agents communicate through a not provided through IMS interfaces. It in- vice to hold IPTV-specific information – per- common SIP client that provides the control terfaces with the IMS core and functions pro- sonalized channels, parental control, adver- interface to the IMS core with help of the vided by the service delivery platform. It also tisement preferences, and so on. Additional IMS user agent. The latter registers users or has access to common IMS enablers provided devices with the IMS core using secure IMS by the IMS common system. SIM (ISIM) authentication. IMS user agents and SIP clients can be implemented in end IMS common system TRADEMARKS devices or in a residential gateway in the The IMS common system consists of the IMS SONY and LocationFree are trademarks or form of a home IMS gateway (HIGA). core and IMS enablers.10-11 registered trademarks of Sony Corporation Ericsson introduced HIGA to enable in- The most relevant enablers for personalized and its affiliates. Ericsson Review No. 3, 2006 109
    • Home IMS gateway core and transport layer is primarily used for managing QoS over the various access networks. Remote access O&M, QoS The article VDSL2: Next important broad- control provisioning management band technology gave an overview of fixed- access network technologies and pointed out that widespread acceptance of Ether- IMS interworking Device net in the aggregation network makes for IMS UA management more efficient delivery of IP services over fixed broadband networks than over legacy ATM access networks.13 And now, with the SIP UA/ B2BUA Identity management release of the TR-101 specification from DSL UA proxy Forum, Ethernet technology has been stan- dardized to support adequate QoS and traf- fic separation.14 The TR-101 specification in- troduces a dual-edge-node architecture that makes it feasible to dedicate one edge node IP device SIP device for IPTV, further optimizing delivery over fixed access. Figure 4 Service delivery platform The home IMS gateway (HIGA, see also BOX B). The service delivery platform provides a va- riety of support functions that can be shared among different types of services. The func- tions, provided through software compo- complexity is contained in extra databases Transport layer nents (called “enablers”), can be roughly di- that the HSS can control if necessary. The transport layer supports fixed and mo- vided into the following support functions: The call/session control function (CSCF), bile access networks by distributing media business, content, service provider, and op- which is the central control point in IMS, streams, injected at headends, to various erations and maintenance (O&M). provides SIP routing services and enforces end devices. A headend consists of stream- Specific to IPTV are content-related sup- authentication and authorization (AA). The ing servers (for live and on-demand content) port functions such as DRM and electronic IMS security functions can be reused for and servers for network-based personal vid- service guides (ESG). DRM is used to pro- generating keys required by digital rights eo recording (nPVR). Apart from a central tect premium content. ESGs provide infor- management (DRM) and for protecting ser- headend, the transport network may contain mation about available services and contain vice access. local headends within the fixed-access net- an electronic program guide that enables Quality of service (QoS) is controlled work. Local headends distribute load and viewers to navigate, discover, and select pro- through a media resource function controller can be used to inject regional content – that grams and content by time, title, channel, (MRFC) and media resource function proxy is, content which is only offered in a par- and genre. (MRFP). ticular area. The interface between the IMS The charging function in the service de- livery platform supports charging models for online and offline charging. Standardization BOX B, HIGA The DVB Forum has finalized a set of The home IMS gateway (HIGA) is a logical function with an attached ISIM card that can be specifications for early deployment of DVB deployed in a residential gateway or other networked devices inside the home. HIGA contains a services over bidirectional IP networks.15 back-to-back user agent (B2BUA) and a SIP user agent (SIP UA), which allow devices in the home network to interact and interwork with the IMS core. Phase 1, which is limited to MPEG-2 DVB SIP devices that contain a SIP UA can register with HIGA. For IP devices, such as a DLNA- services encoded with MPEG-2 technology compatible set-top box, the SIP UA inside HIGA functions as a proxy, initiating registration. The and encapsulated in an MPEG-2 transport B2BUA then translates SIP registration messages into IMS registration messages and sends stream (TS), covers live media broadcast them to the IMS core. The IMS user agent supports the B2BUA with secure ISIM-based authentication. services (in the style of TV or radio), media broadcast with trick modes, and video on After registration, the IMS interworking function of HIGA negotiates session parameters based on demand (VoD). The DVB Forum also has a • the capabilities of home devices (relevant data is retrieved from the device management data- working group that addresses the distribu- base); and tion of broadcast and broadband IPTV ser- • user preferences (managed by the identity management function). Therefore, without any direct user interaction, a media stream (for instance, a video conference vices in the home, DVB-HN. The DVB-HN call or a video-on-demand movie) can be set up and fed to desired home devices. specifications will be based on DLNA guide- 110 Ericsson Review No. 3, 2006
    • lines. Accordingly, a liaison has been set up TERMS AND ABBREVIATIONS between DVB and DLNA. To highlight the need for internation- 3GPP Third Generation Partnership IPsec Internet protocol security al specifications, ITU-T has also recently Program IPTV Internet protocol television formed a focus group for IPTV. AA Authentication and authorization ISIM IMS subscriber identity module ATIS IIF Alliance for Telecommunications ITU International Telecommunications ETSI TISPAN is currently working on a Industry Solutions IPTV Union set of requirements and an architecture that Interoperability Forum LPCM Linear pulse-code modulation address the integration of IPTV services into B2BUA Back-to-back user agent MRFC Media resource function control next-generation networks using the capabili- BCAST Mobile Broadcast Services MRFP Media resource function proxy (subordinate working group in OMA) nPVR Network personal video recorder ties of IMS. ATIS IIF (IPTV Interoperability CSCF Call/session control function OMA Open Mobile Alliance Forum, an American organization for com- DLNA Digital Living Network Alliance PGM Presence and group management munications standards), has created a set of DRM Digital rights management QoS Quality of service IPTV requirements that it has communi- DSL Digital subscriber line RADIUS Remote authentication dial-in user cated to ETSI TISPAN. DVB Digital video broadcasting service DVD Digital versatile disc RGW Residential gateway The main focus of these standardization DVR Digital video recorder SDP Service delivery platform activities is on IPTV as a stand-alone service. EPG Electronic program guide SDP Session description protocol To date, issues such as interworking among ESG Electronic service guide SDS Service development studio interconnected home devices, interfaces to ETSI European Telecommunications SIP Session initiation protocol Standards Institute SMS Short message system IMS for combined services, and fixed-mobile HGI Home Gateway Initiative STB Set-top box convergence have not been addressed. There- HIGA Home IMS gateway TCP Transport control protocol fore, going forward, the work must, among HSPA High-speed packet access TISPAN Telecoms & Internet converged others, also involve HSS Home subscriber server Services & Protocols for Advanced • DLNA and Home Gateway Initiative IETF Internet Engineering Task Force Networks IMS IP Multimedia Subsystem TLS Transport layer security (HGI), to address home networking IMSM IMS messaging UPnP Universal plug-and-play scenarios16 ; and IMS UA IMS user agent VoD Video on demand • 3GPP, TISPAN, and OMA, for harmoni- zation with mobile TV services. Conclusion IPTV, as it exists today, must quickly evolve into a personalized, interactive service that is well integrated with communication services and has inherent support for portable and REFERENCES mobile devices. The most promising approach is to build 1. 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