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Kommunikatsiooniteenuste arendusIRT0080
Loeng 5/2008
Avo Otstelekommunikatsiooni õppetool,
TTÜ raadio- ja sidetehnika [email protected]
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Video vooülekanne
Media Server (Pre-
Encoded Video)
Radio Network Controller
RNC
MAC Scheduling at Base Station
Mobile User Mobile User
High bandwidth
Time-varying with
limited data rates
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Mobiilside firmadelt algus...
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Mobiili kasutus
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Mobiilne multimeedia• D A B
http://en.wikipedia.org/wiki/Eureka_147
• D V B
• D M B
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Content
Download Streaming
On-demand Carousel Non-live Live
Pay TV program Video on-demand Push and store Clips
Subscription Free TV program
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Põhinõuded teenusele• The service must be available outdoor,
indoor and in moving vehicle
• Public channels and pay channels are a must, special channels desirable
• Radio must be available
• Wide coverage (urban, suburban and main roads)
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IP Datacast & OSI model
IP Datacast
Physical LayerPhysical Layer
Data Link LayerData Link Layer
Network LayerNetwork Layer
Transport LayerTransport Layer
Session LayerSession Layer
Presentation LayerPresentation Layer
Application LayerApplication Layer
IPIP--DatacastDatacast
DVBDVB--HH DMBDMB UMTSUMTSGSMGSM
ESG
Service Purchase& Protection
ContentDelivery
QoS
Content Formats
PSI/SI
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Sisu sobivus• Integration: “Any content on any screen”
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DVB-HDigital Video Broadcasting
Handhelds
T-DMBTerrestrial
Digital Multimedia Broadcasting
S-DMBSatellite Digital
Multimedia Broadcast
MBMSMultimedia Broadcast Multicast Service
MediaFloMedia
Forward Link Only
Region Europe, USA,
AustraliaSouth Korea
South Korea, Japan
Europe, South Asia
USA
Video Codec
MPEG-4 MPEG-4 MPEG-4 MPEG-4 MPEG-4
Channels/128kbps
60 3-5 9-27 3 50-70
Cell Size 17-40km 40-60km 3-700km 2-3 km 2-10km
Power Reduction
Time slicingBandwidth shrinking
Bandwidth Shrinking
Time slicingTime division multiplexing
Transport stream
MPEG TS, IP MPEG TS IP IP MPEG, IP
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Signaali levitamine
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Kuidas signaali levitada
+18 dBi
Tower A Tower B
BROADCAST NETWORK: FROM FIXED TV …
MOBILE NETWORK: FROM MOBILE UNICAST …
++
+
++
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Mobile TV arengMobile TV Subscribers by Region
©TelecomView 2007
0
70
140
210
2005 2006 2007 2008 2009 2010 2011
Mill
ion
s
ROW
Western Europe
North America
Asia-Pacific
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Kus ja mis teenus
Sharing(one-to-some)
Service Coverage area
User density
3G MBMS
DVB-HMulticast
Publishing(one-to-many)
3GP-t-P
Boundary Area
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Side tehnoloogiad ja kuludMobile TV Five Year Network Costs
©TelecomView 2007
$0
$5
$10
$15
0 100,000 200,000 300,000 400,000
Mill
ion
s
Subscribers
Ne
two
rk C
os
t
WiMAX Unicast3G HSDPA Unicast
WiMAX Multicast3G HSDPA MulticastUHF Metro
1.7 GHz Metro
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Kuhu areng
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Multimedia Broadcast Multicast Service
Node B
P-t-P
Node B
MBMS
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Üksik vs multisaade
Core Network
SGSN
GGSN
SGSN
Core Network
SGSN
GGSN
SGSN
P-t-P Connection
MBMS 1
2
3
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Mobile (IP)TV
Kandev teenus
(Bearer)
Standardi variant
ja levitamin
e UDP(TCP)/IP Multicasting (IETF):
Multicast Routing Protocols, IGMP
WiMax
(MBS)
DVB
(DVB-H)
DVB
(CMBS)
Qualcom
(MediaFLO)
OMA
(BCAST)
JTC1
(MMC)
3GPP
(MBMS)
3GPP2
(BCMCS)
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ContentProvisioning
ContentAggregation
Provisioning of Datacast Service
Content
Operation ofDatacast Network
User
Operation of Cellular Network
Provisioning of Cellular Services
Provisioning of E-Commerce
Services
Interaction
ServiceManagement
IP Datacast System
Konvergents
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IPDC
The term IP Datacasting (IPDC) is used in DVB-H for the technical elements required to send IP packets over DVB-H broadband downstream channel combined with a return channel over a mobile communications network such as GPRS or UMTS.
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JTC1/MMCMMC (Mobile Multicast Communications)
– ISO/IEC JTC1/SC6/WG7 (ISO/IEC 24793)• MMC-1 (24793-1): MMC Framework• MMC-2 (24793-2): MMC Protocol over Native
IP Multicast Network• MMC-3 (24793-3): MMC Protocol over
Overlay Multicast Network
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Teenus, võrk ja terminal
출처 : 삼성전자 발표자료 (2007.5)
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T-DMB
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DVB-H.
SIGNALLING4k-MODE
DVB-T CODER/MODULATOR
TRANSPORT STREAM MULTIPLEXER
TIME SLICING
ERROR PROTECTION
(MPE-FEC)
IP EN-
CAPSULATION
DVB-HSERVICES
OPTIONAL:DVB-T
SERVICES
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DVB-H = DVB-T + täiendus
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DVB-H parameetrid
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Transpordivood tükeldusele
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Aja liistakud
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DVB-H kasutamine
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DVB-T & DVB-H
e
MUXMPEG-2 TV ServiceMPEG-2 TV ServiceMPEG-2 TV ServiceMPEG-2 TV Service
IP-backboneDVB-H IPE-Time Slicing-MPE-FEC
DVB Multiplexer-For LP MPEG-2
HP
LP
Full DVB-H Terminal-Support both TS and MPE-FEC-Power saving and performance
DVB-H Time Slice Terminal-Support for Time Slicing-Power saving
DVB-T Tx-DVB-H signalling
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DVB-T raadiokanal
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Keerukas modulatsioon
aegaeg
sagedussagedus
võimsusvõimsus
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C1
C5
C1C3
C7
C9
C11
C1
C9
C5C3
C3
Teenindusala piir
C3
Üksiku saatja katteala
Mitmesageduslik võrk (MFN)
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Teenindusala piir
C1
C1
C1
C1
C1
C1
C1
C1
C1
C1
Katteala piir
Ühesageduslik võrk (SFN)
• Kõik saatjad kasutavad võrgus sama sageduskanalit• Saatjad kattealas ei saa töötada iseseisvalt – nad peavad
edastama sama multipleksisisu
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Lõpulingidhttp://www.telecomview.info/http://www.dvb.org/http://www.dvb-h.org/
http://en.wikipedia.org/wiki/OMA_BCASThttp://en.wikipedia.org/wiki/Digital_Multimedia_Broadcastinghttp://eng.t-dmb.org/http://www2.rohde-schwarz.com/en/products/broadcasting/technologies/digital_broadcast/