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Kommunikatsiooniteenuste arendusIRT0080

Loeng 5/2008

Avo Otstelekommunikatsiooni õppetool,

TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee

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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

5

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/