Transcript Mobile Television DVB-H, Operator roles

Mobile Television
Business & Technology Platforms,
DVB-H, Operator Roles
T-109.4300 Network Services Business Models
15.2.2006
Eino Kivisaari
Why mobile TV?
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”Because it is there…”
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People watch TV a lot…
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…It has become technically possible to
deliver the experience of TV watching
in mobile terminals…
So, why not..? 
Why mobile TV? (Contd.)
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Terminal manufacturers are looking for new,
significant factors of differentiation

Advanced (new) features with real benefits
are a means to avoid terminal price decline
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Mobile operators are looking for new
succesful applications as well
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Mobile TV is a new channel for content
providers to re-sell their existing content
Technical Challenges
1) Mobile Reception
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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
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Receiver always on in DVB-T
Constant rendering of a 4-5 Mbps stream (DVB-T, MPEG2)
 Lot of processing power needed
Network Capacity
DVB-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
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Guard Interval: ”air-clearout-time” between OFDM symbols
Code Rate: ratio of payload and error correction data
New in DVB-H
Time Slicing
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For power consumption
Terminal RF receiver is off 90% of the time
Time slicing makes smooth handover possible
4K Subcarrier Mode
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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
IPDC Protocol Stack
AV stream
(H.263, H.264,
AAC, etc.)
RTP
Source: http://www.tml.hut.fi/~lstaffan/MScThesisStaffans.pdf
Referenced 14.2.2006
IPDC Encapsulation
eg. H.263 & AAC
DVB Transport Stream, Protocol Data Units (PDUs)
Source: http://www.tml.hut.fi/~lstaffan/MScThesisStaffans.pdf
Referenced 14.2.2006
Example IPDC Architecture
(IPDC = Internet Protocol DataCasting)
DVB-H Transmitter
Mobile TV
Management
Server
DVB Modulator
IP / MPE
Encapsulator
DVB-H
Terminal
Multicast
IP Network
Stream
Encoder
Stream
Encoder
GSM
Mobile TV
Billing & Charging
Stream
Encoder
Service Announcement
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ESG = Electronic Service Guide
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ESG in DVB-H mobile television is a program guide
+ a lot of technical information for the terminal
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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
Conditional Access
Paid services for mobile TV?
 Conditional Access (CA) methods needed
In terrestrial TV there are many many options…
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Open Interface, Nagravision, Conax, etc...
In DVB-H systems, IPSec and OMA DRM are used
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No security by obscurity
Standard-based solutions
No proprietary algorithms / associated fees as in the
terrestrial TV case
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
Mobile TV Operator Roles
Network Operator
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Operates the DVB-H network
 Modulators, Transmitters, Repeaters…
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Owns & operates the multicast (intra) network
IP / MPE encapsulators
Owner of the frequency
Datacast Operator
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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)
Operator Roles (Contd.)
Content Provider
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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
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Eg. a mobile cellular operator
”Owns” the end-user
Takes care of mobile TV service marketing & branding,
pricing, end-user support, billing & charging
Operator Roles in Providing
(Paid) Mobile TV Services
Content
Provider
Generates ESG
Datacast
Operator
Content
Provider
Network
Operator
Content Stream
broadcast over
DVB-H
Information about
purchasable services
Operates a content
stream encoder
Content
Provider
Content
Provider
Service
Operator 1
Service Operator 2
Service Operator 3
Mobile TV
Terminal
Competing Standards
DVB-H
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UHF (470-750 MHz)
Up to 11 Mbps
DAB
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ISBD-T
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MediaFLO
VHF
~ 1 Mbps
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DMB
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Only in Japan
~ 1,5 Mbps
VHF
~ 1 Mbps
UHF, VHF
Up to 11 Mbps
Qualcomm (proprietary)
Recent Developments
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Nokia Open Air Interface 1.0 (OAI 1.0)
http://www.mobiletv.nokia.com/solutions/openair/
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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 interoperability
http://www.sonyericsson.com/spg.jsp?cc=global&lc=en&ver=4001&template=pc3_1_1&zon
e=pc&lm=pc3_1&prid=4702
Conclusions
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Mobile TV is finally coming
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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…?