FORUM ON NEXT GENERATION STANDARDIZATION
(Colombo, Sri Lanka, 7-10 April 2009)
Real-time Data Streaming – The Next
Generation
Pradeep de Almeida
Chief Technology Officer
Dialog Telekom PLC, Sri Lanka
pradeepdea@dialog.lk
Colombo, Sri Lanka, 7-10 April 2009
Contents
Application
Challenges
Security
Standardization and Standards
Adaptation
Colombo, Sri Lanka, 7-10 April 2009
2
Applications
Mobile Television
Information dissemination
Weather, traffic, airline schedule,
stock, emergency warnings
Telemetry data collection for
remote monitoring /
surveillance
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3
Convergence at all Layers
Broadband
Network
Living Room - IPTV
Seamless
Session Transfer
Mobile
Network
On the Move – Mobile TV
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4
Streaming Content Delivery to Mobile
and Portable Devices
Core Network
IP Core Network supports real-time
traffic in Unicast, Multicast and
Broadcast modes
Challenge is in the Access Network
Bandwidth / Capacity
Quality of Service
Service and Content Security
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5
Access Network
In-band
Streaming over GERAN / UTRAN (Unicast)
Multimedia Broadcast / Multicast Service over UTRAN
(MBMS)
Out-of-band
Broadcasting Technologues
DVB-H
MediaFLO
1 Seg (extension of ISDB-T)
T-DMB / S-DMB
Unidirectional content flow
Uses cellular network for reverse channel
/ interactivity
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Streaming / Unicast
SGSN
GGSN
Content
Streams
Core Network
SGSN
As many number of
streams, end-to-end,
as number recipients
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Multicast /Broadcast
SGSN
GGSN
Content
Streams
Core Network
SGSN
Single stream per
content, end-to-end
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8
Out-of-band Broadcast
Broadcast Channel
Broadcast
Network
Content
Transmitter
Reverse / Interactivity
Channel
Colombo, Sri Lanka, 7-10 April 2009
BTS /
Node B
Cellular Network
(GSM/GPRS/3G)
Interaction
Processing
and
Subscriber Management /
Charging System Interface
9
Choice of Technology
Mode /Technology
Typical Applications
Streaming
(GPRS  LTE)
On-demand Media
retrieval
Real-time P2P
Datacasting
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
Colombo, Sri Lanka, 7-10 April 2009
Merit Profile
Taxing on the cellular
access network
Less costly
Roaming possible
Reliable delivery through
FLUTE & file-repair
procedure for data
casting (MBMS only)
No capacity impact on
cellular network
Requires an overlay
broadcast network
No roaming
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Choice of Technology
Colombo, Sri Lanka, 7-10 April 2009
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 Services
Efficient use of Radio & Core Network Resources
PTM Broacasting and Multicasting Capability
Different QoS for each Media Session
Error protection (ex. interference, cell changes etc.)
Synchronization between media sessions
Service Interworking (MBMS with e.g. MMS etc)
Streaming over RTP / SRTP
Download over FLUTE
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MBMS over 2G/3G UMTS/HSDPA
Content
Provider
CBC

Elements needing upgrades

SGSN / GGSN

UTRAN / GERAN

User Equipment
PDN
(e.g. Internet)
OSA
SCS
HLR
CSE
Content
Provider
BM-SC
Gmb
Gr
Gi


New Network Elements
BM-SC (Broadcast Multicast
Uu
UE
Iu
Gn/Gp
UTRAN
SGSN
Gi
GGSN
Gi
BG
Multicast
Broadcast
Source
Service Centre)
Gi
Iu/Gb
Multicast
Broadcast
Source
Um
UE

Existing Network Limitations

Per user GTP tunnels for multicast content

Inefficient use of radio resources

Cell broadcast – low bit rate services only
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GERAN

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
13
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
Colombo, Sri Lanka, 7-10 April 2009
Ref: 3GPP TS 36.300
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DVB-H Network
Content
Ingest
IP Encapsulator
Broadcast Backhaul
Network
Transmitter
DVB-H Service
Manager
Interaction
Manager
Cellular PS
Network
Subscriber Management
& Charging System
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Interactivity for DVB-H
Broadcast Channel
(One way flow)
DVB-H
Service Manager
DVB-H Service
Manager
Cellular PS Channel
• Interactions
• On-demand content
• Push content
Colombo, Sri Lanka, 7-10 April 2009
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, Lband, S-band
VHF, UHF
UHF
VHF, UHF
S-band, Kuband
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
Modulation
WCDMA
OFDM
COFDM,
TDM / COFDM
OFDM
OFDM
OFDM
OFDM
Error
Correction
Turbo, Raptor
code
Convolutional
, ReedSolomon
Turbo,
Convolutional
Turbo, ReedSolomon
Convolutional
, ReedSolomon
Convolutional
, ReedSolomon
Convolutional
, ReedSolomon
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
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0.2~1.2
bps/Hz
Compiled from published literature and Internet
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Mobile TV Standard Adaptation
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Security
Subscription
Authentication & Authorization
Encryption of content
Key Management System
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MBMS Security Architecture

User Authentication & Authorization

Traffic Protection

Using HTTP Digest

Streaming using RTP/SRTP
User Authentication & Authorization

Data downloads using FLUTE


GAA / GBA used for key agreement

Distribution through MIKEY
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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 industry
Standards specified by DVB.org
Based on conventional Conditional Access System (CAS)
for digital television broadcasting
Keys are broadcasted over broadcast media
The Key Management System (KMS) is vendor specific
OMA BCAST is driven by the telco industry
OMA (Open Mobile Alliance) specified
KMS is specified
Keys are delivered over cellular mobile network
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OSF Approach
KDA
Encoder +
Scrambler
Control
Word (CW)
IPE
Modulator
KMS
Device
Agent
ECMs
EMMs
CA
Applet
CA
Control
System
ECM: Entitlement Control Message
EMM: Entitlement Management Message
KMS: Key Management System
Colombo, Sri Lanka, 7-10 April 2009
Adopted from Irdeto Presentation Material
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OMA BCAST Approach
Encoder +
Scrambler
IPE
Modulator
BCAST
Client
STKM
BCAST SIM
LTKM
BCAST
Server
STKM: Short-term Key Message
LTKM: Long-term Key Message
Colombo, Sri Lanka, 7-10 April 2009
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
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