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© Vodafone 2005
Mobile Broadcasting:Trends and Challenges
Prof. Dr. Claus SattlerExecutive Director
LS Summit 2007
20. June 2007, Lichtenau
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Topics
_ Introduction of bmcoforum
_Overview on mobile broadcast technologies
_State of the art of the different bearers
_Convergence/compatibility aspects of bearers
_The link budget study of bmcoforum
_Trial results, especially regarding indoor coverage expectations
_Some experiences with existing devices
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About bmcoforum
1. Regulation and spectrum lobbying
2. DVB–H terminal interoperability
3. Bearer technologies4. Broadcast network
structure and coverage expectations
5. Generic business models6. National trials7. Content formats and
services8. Outlook 2010
”Broadcast Mobile Convergence Forum“ is an
to accompany and support the development of an open market for mobile broadcast services
international non-profit industrial association
102 mobile broadcast focussed industry companies and consortia from all parts of the value chain!
Merged with IPDC Forum
Co-founder and secretariat member of EMBCW
ork
item
s 20
07
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bmcoforum members: 102 (June 2007)
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bmcoforum Studies
Public available from bmcoforum website:
_Mobile Broadcast Business Models - A State-of-the-Art Study (11/2006)
_Mobile Broadcast Technologies - Link Budgets (01/2007)
_Mobile Broadcast Bearer Technologies - A Comparison (01/2007)
To be ordered:
_Results of Mobile TV Pilots - A Survey (11/2006)
_Spectrum for Mobile Broadcasting in Europe (11/2006)
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Overview Mobile Broadcast Technologies
DAB UMTS DVB-T
MBMS
eDA
B
MO
T
IP
File
s
IPDC: CBMS, OMA BCAST
Access to content
Multimedia
T-D
MB
DVB
-H
TV
MediaFLO S-DMB ATSCISDB-T
DVB
-SH
STiMi
CMMB
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Pilots & Commercial Networks Worldwide
DVB-H
T-DMB
ISDB-T
MediaFlo
S-DMB
CMMB
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Pilots & Commercial Networks European Wide
DVB-SH
T-DMB
MediaFlo
DAB-IP
DVB-H
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Commercial Services Worldwide
No of usersStartCountryTechnology
7.000Oct 2006UKDAB-IP
300.00020.000
May 2006June 2006
June 2007
announced
Italy - 3 Italy- Mediaset
Finland
Vietnam
DVB-H
1.400.000
10.000
Dec 2005
June 2006
Korea
Germany
T-DMB
600.000May 2005KoreaS-DMB
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Convergence/compatibility aspects (1)
_Different bearer & service technologies under evaluation
_Each technologies has its pros and cons
_Different business perspectives and the choice of business model may make suitable one or another combination of technologies
_DVB-H is the most piloted bearer technology today
_DVB-H and DVB-IPDC seem to be the most accepted technologies today
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Convergence/compatibility aspects (2)
_Other technologies such as T.DMB/DAB-IP, Flo, DVB-SH,CMMB STiMi, OMA BCAST, 3G MBMS has its supporters
_Therefore harmonisation is necessary for “seamless” European-wide and global services
_Key components include
• Receiver Frequencies
• Bearer combinations
• Multiple Service Specifications and Implementations
_Electronic Service Guide
_Service Purchase and Protection
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Convergence/compatibility aspects (3)
Receiver Frequency Directions:
1. Multi-band RF receivers for several bands+ Allow usage of different bearers+ Increased spectrum and therefore service capacity+ Vastly increases availability of networks and coverage+ Lowers TTM in many countries
- Increased receiver complexity- Wide scanning range- Antenna design problems
2. Definition of UHF sub-band+ Receiver design optimization might improve system
cost and performance
- Mandate to CEPT could introduce TTM issue- Might create legacy networks, terminals
and services
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Convergence/compatibility aspects (4)
Bearer Combinations (examples only):_ Integrated HF-receivers (DAB and DVB-T) on the
roadmap_ Announcements during 3GSM (examples):
• DiBcom: DIB1908x-H, a multi-mode, multi-band receiver demodulating DVB-T, DVB-H, T-DMB, DAB, DAB-IP and Enhanced-mode-DAB signals in VHF, UHF and L-band frequency bands.
• NXP: extension of its reception modules family for UHF and L-Band to the S-Band - delivery of broadcast mobile TV in the S-band (2.2GHz) based on DVB-SH. First release of the S-Band-compatible RF chipset is scheduled before June 2007.
• Qualcomm: Chipset supporting MediaFLO, DVB-H and ISDB-T
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Convergence/compatibility aspects (5)
DAB UMTS DVB-T
MBMSMOT
IP
Files
IPDC: CBMS, OMA BCAST
Access to content
Multimedia
T-DMB
DVB-H
HF Receiver
DAB UMTS DVB-T
MBMSMOT
IP
Files
IPDC: CBMS, OMA BCAST
Access to content
Multimedia
T-DMB
DVB-H
HF Receiver
Service Specifications Directions:
Option A:_ Parallel development of DMB and
DVB-H/IPDC
_ Different services over DMB and DVB-H/IPDC
_ Dual-mode handhelds
_ Announcement of BT Movio on dual DAB-IP and DVB-H receivers
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Convergence/compatibility aspects (6)
Service Specifications Directions:
Option B:• IP Layer adaptation e.g.
adapt DAB to IP Layer
• DAB and DVB-H will be used as bearers
• DAB for band III and L-band
• DVB-H for band IV/I and L-band
• Liaison between WorldDMB -TFC and DVB-IPDC
DAB UMTS DVB-T
MBMSeDAB
IP
IPDC: CBMS, OMA BCAST
Access to content
Multimedia
DVB-H
HF Receiver
DAB UMTS DVB-T
MBMSeDAB
IP
IPDC: CBMS, OMA BCAST
Access to content
Multimedia
DVB-H
HF Receiver
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bmcoforum Link Budget White Paper (1)
The white paper lists, for the various usage scenarios, what standard field strength values should be used for network planning of
• DVB-H,
• T-DMB,
• MediaFLO
• DVB- SH
Free copy download under:www.bmcoforum.org/index.php?id=63
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bmcoforum Link Budget White Paper (2)2.Usage scenario3.Link Budget Evaluation4.Technology independent parameters
4.1. Quality of Coverage4.2. Penetration losses4.3. Combined Field strength variation4.4. Antenna gain4.5. Other losses
5.Network architecture dependent factors5.1. SFN gain5.2. Antenna diversity gain
6.Technology dependent parameters6.1. Bandwidth6.2. Noise Figure6.3. Carrier-to-Noise ratio6.4. Coverage classes
7.Reference minimum field strengths for network planning
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bmcoforum Link Budget White Paper (3)
+2 dBi0 dBi-2.5 dBi / 0 dBi[2]S-Band (2170)
0 dBi-3 dBi / 0 dBi 7-5 dBi / 0 dBi [1]L-Band
-1 dBi-1 dBi-5 dBiUHF (858)
-2 dBi-3 dBi-7 dBiUHF (698)
-2 dBi-6 dBi-10 dBiUHF (474)
-4 dBi-12 dBi-16 dBiVHF Band III (225)
Class CClass A,B,D with attached
antenna
Class A,B,D with built-in
antenna
Frequency (MHz)
Table 5: Antenna gain
Example Sheet:
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Trial Results – Indoor Coverage (1)
_High stationary usage_Increasing mobile usage during the pilot
42%
34%
25%
16%
14%
14%
At home in theevening
During lunchtime
At work
Demonstrationsto friend
In public transportafter work
In car
Trial Phase I (16QAM)
Trial Phase II (QPSK)
55%
34%
30%
19%
19%
17%
13%
At home
At work (indoor)
On the move(stationary)
At friends
On the move(tram/bus)
On the move (train,regional train)
In car, no driving
Stationary usage
Mobile usage
Several answers possible
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Trial Results – Indoor Coverage (2)
64%
62%
55%
55%
34%4
8,4
%
42,1
%
30,2
%
61,5
%
27,6
%
35,1
%
0%
10%
20%
30%
40%
50%
60%
70%
At home On the move At work
BT Movio
Swisscom
TelefonicaSpain
VodafoneSpain
_More than half of users watched mobile TV at home, about a third also at work
_This underlines the need of strong indoor coverage
In which places have you ever used the mobile TV service?
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Trial Results – Indoor Coverage (3)
Reasons for home usage (no priority):
_Pilot specifics (usage when you have time)
_Usage in a room where no stationary TV available
_Usage of a different channel than at the main TV
_Usage of a channel not in the main TV package
_Usage to relax before going to sleep
_Benefit of “Personal TV”
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Device Sensivity
T-Systems field and lab tests results of 5 receivers in UHF Channel 39 (middle of 2006):
Even for the best receivers the median sensitivity was less than required (46,2 dBµV/m) in the Implementation Guideline
Source: T-Systems
… means:We are searching for We are searching for better receivers!better receivers!
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Contact
Broadcast_Mobile_Convergence Forum
(bmcoforum)
Prof. Dr. Claus Sattler
Attilastr. 61-67
D-12105 Berlin
Fon +49_30_255 680 -10
Fax +49_30_255 680 –99
