Colombo, Sri Lanka, 7-10 April 2009

Real-time Data Streaming – The Next Generation

Pradeep de AlmeidaChief Technology Officer

Dialog Telekom PLC, Sri Lankapradeepdea@dialog.lk

FORUM ON NEXT GENERATION STANDARDIZATION

(Colombo, Sri Lanka, 7-10 April 2009)

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Contents

ApplicationChallengesSecurityStandardization and Standards Adaptation

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Applications

Mobile Television

Information disseminationWeather, traffic, airline schedule,stock, emergency warnings

Telemetry data collection forremote monitoring / surveillance

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Convergence at all Layers

MobileNetwork

BroadbandNetwork

Living Room - IPTV

On the Move – Mobile TV

Seamless Session Transfer

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Streaming Content Delivery to Mobile and Portable Devices

Core NetworkIP Core Network supports real-time traffic in Unicast, Multicast and Broadcast modes

Challenge is in the Access NetworkBandwidth / CapacityQuality of ServiceService and Content Security

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Access Network

In-bandStreaming over GERAN / UTRAN (Unicast)Multimedia Broadcast / Multicast Service over UTRAN (MBMS)

Out-of-band Broadcasting Technologues

DVB-HMediaFLO 1 Seg (extension of ISDB-T) T-DMB / S-DMB

Unidirectional content flowUses cellular network for reverse channel/ interactivity

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Streaming / Unicast

Core Network

SGSN

SGSN

GGSN

As many number of streams, end-to-end, as number recipients

Content Streams

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Multicast /Broadcast

Core Network

SGSN

SGSN

GGSN

Single stream per content, end-to-end

Content Streams

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BroadcastNetwork

Transmitter

Out-of-band Broadcast

Reverse / Interactivity Channel

BTS / Node B

Cellular Network(GSM/GPRS/3G)

Content

Broadcast Channel

InteractionProcessing

and Subscriber Management /Charging System Interface

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Choice of Technology

Mode /Technology Typical Applications Merit Profile

Streaming(GPRS LTE)

On-demand Media retrievalReal-time P2P Datacasting

Taxing on the cellular access networkLess costlyRoaming possibleReliable delivery through FLUTE & file-repair procedure for data casting (MBMS only)

MBMS(3G LTE)

Media delivery (short duration – push)P2P and P2MP Datacasting

Broadcast Technologies(DVB-H, MediaFLO,1 Seg, T/S-DMB)

Media delivery (long duration / continuous)Infotainment

No capacity impact on cellular networkRequires an overlay broadcast networkNo roaming

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Choice of Technology

Source: Ericsson Presentation Material

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Multimedia Broadcast Multicast Service (MBMS)

MBMS defined in 3GPP as “a point-to-multipoint (PTM) downlink bearer service for IP data in the PS domain” offering high speed data rates up to 256 kbit/s

MBMS Features and ServicesEfficient use of Radio & Core Network ResourcesPTM Broacasting and Multicasting CapabilityDifferent QoS for each Media SessionError protection (ex. interference, cell changes etc.)Synchronization between media sessionsService Interworking (MBMS with e.g. MMS etc)Streaming over RTP / SRTPDownload over FLUTE

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MBMS over 2G/3G UMTS/HSDPA

Elements needing upgrades SGSN / GGSN

UTRAN / GERAN

User Equipment

New Network Elements BM-SC (Broadcast Multicast

Service Centre)

Existing Network Limitations Per user GTP tunnels for multicast content

Inefficient use of radio resources

Cell broadcast – low bit rate services only

UE SGSN

UE GERAN

UTRAN

CBC

CSEHLR

GGSN BG

BM-SC

MulticastBroadcastSource

MulticastBroadcastSource

ContentProvider

Uu Iu

Iu/Gb

Um

Gr

Gn/Gp Gi

Gi

Gi

Gi

PDN(e.g. Internet)

ContentProvider

OSASCS

Gmb

Enhancements from MBMS New multicast transport channel defined

PTM transport over HSDPA

Intelligent switching to and from PTP PTM modes

Ref: 3GPP TS 23.246

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MBMS over 3G LTE

Improvements offered by eMBMS Better performance from OFDM SFNs

Combining from synchronized cells

Increased throughput from higher data rates

Reduced interference, increased receive power

Carrier sharing for broadcast/multicast and unicast

is more practical

7kHz sub-carrier defined for eMBMS

Ref: 3GPP TS 36.300

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DVB-H Network

DVB-H Service Manager

ContentIngest

Interaction Manager

Subscriber Management & Charging System

Transmitter

IP Encapsulator

Broadcast BackhaulNetwork

Cellular PSNetwork

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Interactivity for DVB-H

DVB-H ServiceManager

DVB-HService Manager

Broadcast Channel(One way flow)

Cellular PS Channel• Interactions• On-demand content• Push content

Adopted from Nokia Presentation Material

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Comparison of Media Broadcast Technologies

MBMS DVB-H DVB-SH MediaFLO 1 Seg / ISDB-T

T-DMB S-DMB

Standard Open / 3GPP Open / DVB.org

Open/ DVB.org

Proprietary / Qualcomm

Open / ARIB (Japan)

Open / South Korea

Open / South Korea

Frequency 2 GHz VHF, UHF VHF, UHF, L-band, S-band

VHF, UHF UHF VHF, UHF S-band, Ku-band

Channel Bandwidth

5 MHz 5,6,7,8 MHz 1.7,5,6,7,8 MHz

6 MHz 432 kHz 1.538 MHz 25 MHz

Spectral Efficiency

0.15~0.3 bps/Hz

0.45~1.86 bps/Hz

0.49~2.15 bps/Hz

0.47~1.87 bps/Hz

0.2~1.2 bps/Hz

Modulation WCDMA OFDM COFDM,TDM / COFDM

OFDM OFDM OFDM OFDM

Error Correction

Turbo, Raptor code

Convolutional, Reed-Solomon

Turbo, Convolutional

Turbo, Reed-Solomon

Convolutional, Reed-Solomon

Convolutional, Reed-Solomon

Convolutional, Reed-Solomon

Data rate in real scenario

Up to 1.5 Mbps

Up to 15 Mbps

17.2 Mbps Up to 15 Mbps

416 kbps Up to 1.4 Mbps

Compiled from published literature and Internet

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Mobile TV Standard Adaptation

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Security

SubscriptionAuthentication & AuthorizationEncryption of contentKey Management System

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MBMS Security Architecture

User Authentication & Authorization Using HTTP Digest

User Authentication & Authorization GAA / GBA used for key agreement

Distribution through MIKEY

Traffic Protection Streaming using RTP/SRTP

Data downloads using FLUTE

Ref: 3GPP 33.246

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Service Purchase & Protection(SPP) for DVB-H

Device Based

SIM based

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SIM Based Security

OSF is driven by the broadcast industryStandards specified by DVB.orgBased on conventional Conditional Access System (CAS) for digital television broadcastingKeys are broadcasted over broadcast mediaThe Key Management System (KMS) is vendor specific

OMA BCAST is driven by the telco industryOMA (Open Mobile Alliance) specifiedKMS is specifiedKeys are delivered over cellular mobile network

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OSF Approach

CA ControlSystem

IPE Modulator

ControlWord (CW)

ECMsEMMs

Encoder +Scrambler

CAApplet

KMSDeviceAgent

KDA

ECM: Entitlement Control MessageEMM: Entitlement Management MessageKMS: Key Management System

Adopted from Irdeto Presentation Material

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OMA BCAST Approach

BCASTServer

IPE Modulator

Encoder +Scrambler

BCASTClient

BCAST SIM

STKM

LTKM

STKM: Short-term Key MessageLTKM: Long-term Key Message

Adopted from Irdeto Presentation Material

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Conclusion

Challenge for standardization to achieve global interoperability

Challenge for the operators is to select the right technology mix to delight the customer