mobile television business & technology platforms, dvb-h, operator roles t-109.4300 network...
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Mobile TelevisionBusiness & Technology Platforms,
DVB-H, Operator Roles
T-109.4300 Network Services Business Models
15.2.2006
Eino Kivisaari
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Why mobile TV?
”Because it is there…”
People watch TV a lot…
…It has become technically possible to
deliver the experience of TV watching
in mobile terminals…
So, why not..?
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Why mobile TV? (Contd.)
Terminal manufacturers are looking for new, significant factors of differentiation
Advanced (new) features with real benefits are a means to avoid terminal price decline
Mobile operators are looking for new succesful applications as well
Mobile TV is a new channel for content providers to re-sell their existing content
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Technical Challenges
1) Mobile Reception An antenna inside a terminal, a terminal inside a building.. Terminals are moving fast (inside cars, trains..) ..Compared to a stationary roof-top antenna (DVB-T)
2) Battery Consumption Receiver always on in DVB-T Constant rendering of a 4-5 Mbps stream (DVB-T, MPEG2)
Lot of processing power needed
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Network CapacityDVB-T: ~24 Mbps (64QAM) 3-6 Mbps / TV channel
Appr. 5 channels per multiplex
DVB-H: 5-11 Mbps (QPSK…16QAM) 250-500 kbps / TV channel
Up to tens of channels
Raw DVB-H bandwidth depends on the Modulation used(QPSK or 16QAM), Guard Interval, and Code Rate Guard Interval: ”air-clearout-time” between OFDM symbols Code Rate: ratio of payload and error correction data
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New in DVB-HTime Slicing
For power consumption Terminal RF receiver is off 90% of the time Time slicing makes smooth handover possible
4K Subcarrier Mode 2K: Tolerates high speed terminal movement, but
only small cell size ( costly network) 8K: Big cell diameter (up to 80 km), but cannot
handle terminals moving too fast 4K: Good compromise between 2K and 8K
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IPDC Protocol Stack
Source: http://www.tml.hut.fi/~lstaffan/MScThesisStaffans.pdf
Referenced 14.2.2006
RTP
AV stream(H.263, H.264,AAC, etc.)
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IPDC Encapsulation
Source: http://www.tml.hut.fi/~lstaffan/MScThesisStaffans.pdf
Referenced 14.2.2006
eg. H.263 & AAC
DVB Transport Stream, Protocol Data Units (PDUs)
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Example IPDC Architecture
StreamEncoder
Mobile TVManagement
Server
DVB Modulator
IP / MPEEncapsulator
Mobile TVBilling & Charging
Multicast IP Network
DVB-HTerminal
DVB-H Transmitter
GSM
StreamEncoder
StreamEncoder
(IPDC = Internet Protocol DataCasting)
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Service Announcement
ESG = Electronic Service Guide
ESG in DVB-H mobile television is a program guide + a lot of technical information for the terminal
ESG is needed for opening a program stream: what channel’s content is coming from what IP multicast address / port, using which codec, etc…
ESG also supports the paid services
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Conditional Access
Paid services for mobile TV? Conditional Access (CA) methods needed
In terrestrial TV there are many many options… Open Interface, Nagravision, Conax, etc...
In DVB-H systems, IPSec and OMA DRM are used No security by obscurity Standard-based solutions No proprietary algorithms / associated fees as in the
terrestrial TV case
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Single-Frequency Networks
Source: http://www.dvb-h-online.org/PDF/DigiTAG-DVB-H-Handbook.pdf Referenced 8.2.2006
Amount of transmitter stations: Cellular >> DVB-H >> Terrestrial Digital TV
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Mobile TV Operator RolesNetwork Operator
Operates the DVB-H network Modulators, Transmitters, Repeaters… Owns & operates the multicast (intra) network IP / MPE encapsulators Owner of the frequency
Datacast Operator Orchestrates the mobile TV technical platform between
content providers (TV channels), service operators (cellular operators), datacast operator and DVB-H network operator
Generates ESG (which is then filecasted to terminals)
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Operator Roles (Contd.)
Content Provider Eg. a TV Channel (such as BBC, YLE, MTV3 or Nelonen) Owner (or aggregator) of the content Produces a digital content stream by encoding (an existing)
the audio/video signal for use in mobile TV
Service Operator Eg. a mobile cellular operator ”Owns” the end-user Takes care of mobile TV service marketing & branding,
pricing, end-user support, billing & charging
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Service Operator 3
Operator Roles in Providing(Paid) Mobile TV Services
NetworkOperator
DatacastOperator
Service Operator 1
Content Provider
Mobile TVTerminal
Content Streambroadcast over DVB-H
GPRS
Information aboutpurchasable services
Purchase
requests
Digital
Rights
Generates ESG
Operates a contentstream encoder
Content Provider
Content Provider
Content Provider
Service Operator 2
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Competing Standards
DVB-H UHF (470-750 MHz) Up to 11 Mbps
DAB VHF ~ 1 Mbps
DMB VHF ~ 1 Mbps
ISBD-T Only in Japan ~ 1,5 Mbps
MediaFLO UHF, VHF Up to 11 Mbps Qualcomm (proprietary)
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Recent Developments
Nokia Open Air Interface 1.0 (OAI 1.0)http://www.mobiletv.nokia.com/solutions/openair/
Contains specifications for ESG functionality, service protection and purchase etc…
Aimed to speed up DVB-H terminal availability from various manufacturers, to make the overall DVB-H market bigger
Sony Ericsson and Nokia collaborating for DVB-H interoperabilityhttp://www.sonyericsson.com/spg.jsp?cc=global&lc=en&ver=4001&template=pc3_1_1&zone=pc&lm=pc3_1&prid=4702
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Conclusions Mobile TV is finally coming
Commercial launches 2006/07…? Commercial success… remains still
in the end-users’ hands
An important point: Mobile terminal is the first device to include both a
Broadcast Receiver (TV & Radio Channels) and an Internet Connection (GPRS) & Browser
What business consequences can this have?A wave of new interactive services? Mobile TV shops?
Purchase of media clips? Pay-per-view programs? Mobile TV as a ”must-have” terminal feature by 2009…?