Welcome to the. «DVB-H for TV on Mobiles» Gerard FARIA de SOUZA NEVES Teamcast

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1 Welcome to the «DVB-H for TV on Mobiles» Gerard FARIA de SOUZA NEVES DVB-H Workshop -SET'05 - Sao Paulo - 22 September

2 Technologies fight to serve TV on Mobile But numerous challenges have to be took over! UMTS (MBMS) (MBMS) DAB-T (T-DMB) (T-DMB) GSM (GP) (GP) DVB-T (DVB-H) (DVB-H) CDMA (MediaFLO (MediaFLO) MediaFLO) ISDB-T (SS) (SS) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

3 Digital TV to Handhelds: A challenge of integration Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

4 Mobile Phones aggregate lot of features GSM 900 GSM 1800 UMTS 2300 CDMA 800/1900 WiMax (WMAN) WiFi (WLAN) Blue Tooth (WPAN) Wireless Network World Mobile Telecom World Don t t forget THE fashionable option: our elegant BACKPACK to carry battery Terrestrial Broadcast World T-DMB (DAB) DVB-H (DVB) T-SS (ISDB) GPS MP3 Player FM Radio DVB-H Workshop -SET'05 - Sao Paulo - 22 September

5 Digital TV to Handhelds: A challenge to reduce power consumption Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

6 But Features need to be Powered! DVB-T Single Antenna Reception GSM Interaction Channel Battery Pack Mediascreen remained a «concept terminal» because battery! DVB-H Workshop -SET'05 - Sao Paulo - 22 September

Physical Layer 432 KHz / 400 kbps Selected solution: to reduce channel

7 Power is a generic problem for TV on Mobile Power Consumption is also an issue For ISDB-T 6 MHz Channel BW Center Segment for Mobile Physical Layer 432 KHz / 400 kbps Selected solution: to reduce channel bandwidth and bitrate! DVB-H Workshop -SET'05 - Sao Paulo - 22 September

8 Digital TV to Handhelds: A challenge for network planning Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

9 Broadcasts to Handhelds differ from broadcasts to fix TV sets Digital TV transmitter PLUS Outdoor To Indoor Penetration Loss: 8 db FOR FIX But for NOMADIC RECEPTION: RECEPTION: Field Strength Field Strength Is Planned Shall be For given C/N available At 10 meters At 1 meter Above Above Ground. Ground Level PENALTY: 12 db Broadcast to NOMADIC handhelds Terminals: - Ground level penalty = 12 db - Indoor OR (AND) Mobile penalty = 8 db (16 db) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

10 Broadcast to Mobile Handhelds should imply Single Frequency Networks Equalising the Field Strength with Single Frequency Network is THE major advantage of the COFDM broadcasting technologies! DVB-H Workshop -SET'05 - Sao Paulo - 22 September

11 Digital TV to Handhelds: A challenge to cope with Mobile Reception Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

Mobile Performances : C/N versus Doppler 50,0 db 40,0 db DVB-T vs DVB-H (8K - gi 1/4-16QAM 2/3 - MPE-FEC 3/4) 13,27 Mbps f D = V f rf C cos(φ) DVB-H @ FER 5% DVB-H @ MFER 5% DVB-T "Rayleigh" 30,0 db

12 Mobile Performances : C/N versus Doppler 50,0 db 40,0 db DVB-T vs DVB-H (8K - gi 1/4-16QAM 2/3 - MPE-FEC 3/4) 13,27 Mbps f D = V f rf C cos(φ) FER 5% MFER 5% DVB-T "Rayleigh" 30,0 db 20,0 db Christian Andreas DOPPLER ( ) 1853) 64QAM 2/3 (20 Mbps) DVB-H MPE-FEC GAIN : 2 to 5 db (Pedestrian) DVB-H MPE-FEC GAIN : 5 to 9 db (Mobile) DVB-H H Gain Area Flat Behaviour 10,0 db 0,0 db 0 Hz 1 Hz 10 Hz 100 Hz 1000 Hz 470 MHz UHF Band IV (21) 16QAM 2/3 (13 Mbps) QPSK 1/2 (5 Mbps) 854 MHz UHF Band V (69) 1 km/h 0,4 km/h DVB-T Mobile Penalty 6 to 12 db Until Max Speed 2 km/h 7 km/h 23 km/h 69 km/h 230 km/h 689 km/h TU6 1 km/h DVB-H Workshop 4 km/h -SET'05-13 Sao km/h Paulo - 22 September 38 km/h km/h 379 km/h 12

13 Digital TV to Handhelds: All competing technologies are using COFDM transmission WHY? Gerard FARIA de SOUZA NEVES DVB-H Workshop -SET'05 - Sao Paulo - 22 September

14 DIGITAL TERRESTRIAL BROADCAST DAB / DVB-H H / ISDB-T T / MediaFLO make use of Coded Orthogonal Frequency Division Multiplex (COFDM) modulation... Distant transmitter Nearest transmitter COFDM is the alone transmission system embedding features to cope with Terrestrial Multi-pathes DVB-H Workshop propagation -SET'05 - Sao Paulo - 22 AND September 2005 Mobile Doppler effects 14

15 COFDM Transmission: How does it work? 1 Time-Frequency cells / Orthogonal carriers / Guard Interval DAB DVB ISDB FLO Orthogonal Carrier Spacing OFDM symbol 1,5 MHz 2K 1K 5/6/7/8 MHz 8K 4K 2K 6/7/8 MHz 8K 4K 2K 6 MHZ 4K Guard Interval Useful Period Time 2K 4K 8K Offers the SAME Bitrate range! frequency frequency frequency Guard Interval is this necessary evil which consumes transmission capacities, respectively 25%, 12.5%, 6.25%, 3.12% for GI= 1/4, 1/8, 1/16, 1/32 DVB-H Workshop -SET'05 - Sao Paulo - 22 September

16 COFDM Transmission: How does it work? 2.1 (DAB / T-DMB) T Time Domain Synchronisation [no channel estimation as Differential QPSK modulation] Frame duration Null FFT symbol window Synchronization symbol (TFPR) time frequency FFT time windows for receivers DVB-H Workshop -SET'05 - Sao Paulo - 22 September

17 COFDM Transmission: How does it work? 2.2 (Others) Time & Frequency Domains Synchronisation + Channel Estimation OFDM symbol FFT window Guard Interval Useful Period Time frequency frequency frequency Pilots & TPS consume transmission capacities (8% & 1%), But Pilots are needed to perform channel error estimation! DVB-H Workshop -SET'05 - Sao Paulo - 22 September

18 COFDM Transmission: How does it work? 3.1 (DAB/T-DMB) DMB) Channel Coding to Protect Data [ISDB-T T & MediaFLO also uses Time-Interleaved Logical Sub-Channels] DATA to broadcast (up to 1.5 Mbps) Inner FEC coding and Inter-frame Time Interleave [*] (up to 2.3 Mbps) time frequency [*] Frame is divided in sub-channels (i.e. set of adjacent OFDM symbols) And FEC is applied individually per sub-channel as the time interleave among 16 successive frames DVB-H Workshop -SET'05 - Sao Paulo - 22 September

19 COFDM Transmission: How does it work? 3.2 (Others) Channel Coding to Protect Data Data to Broadcast Concatenated (Outer & Inner) FECs + Interleavers (Bytes & Bits) Time frequency frequency frequency Protection coding consumes bitrate but allows to reconstruct lost t data! Respectively 50%, 33%, 17%, 13% for 1/2, 2/3, 3/4, 5/6, 7/8 DVB-H Workshop -SET'05 - Sao Paulo - 22 September

20 Digital TV to Handhelds: DVB-H H is THE future proof solution! Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

21 DVB-H H targets Handheld Battery Powered Terminals HTHT HTHT H DVB-H Workshop -SET'05 - Sao Paulo - 22 September Every Time, Every Where (Nomadic) On the Move (Mobile) AT HOME (Fix)

Services T-DMB Multimedia Services CBMS: Service Convergence IPDC: Transport Convergence IP MAC LAYER IP Digital TV Services

22 With the introduction of TV on Mobile, some Protocol Stacks evolve to convergence! MULTIMEDIA CONTENTS MediaFlo Multimedia Services ISDB-T Digital TV Services ISDB-T Multimedia Services DAB Digital RADIO Services T-DMB Multimedia Services CBMS: Service Convergence IPDC: Transport Convergence IP MAC LAYER IP Digital TV Services DVB frame TS TS circuit TS packet TS TS FLO PL ISDB-T Physical Layer T-DAB Physical Layer PHYSICAL LAYER DVB-T Physical Layer DVB-H Workshop -SET'05 - Sao Paulo - 22 September

23 DVB-H a collection of enabler technical features Time Time Slicing Slicing Time Slicing: : a transmission method to allow battery saving in receivers, FEC FEC (Reed (Reed Solomon) Solomon) MPE-FEC: FEC: : an additional protection at the DATA link layer level, 4K 4K fft fft (8K, (8K, 2K) 2K) Enhanced Enhanced TPS TPS signaling signaling 4K: : a new trade-off (coverage vs speed) for network planning flexibility, TPS : signalling data in the channel to speed-up DVB-H H services discovery, In-depth interleaver: : a free feature to improve impulse noise resilience for 2K & 4K transmissions. DVB-H Workshop -SET'05 - Sao Paulo - 22 September

DVB-H MPE-FEC protection with virtual TI 192 columns

Header IP Datagram 2 IP Header IP Datagram 3 IP Datagram 3

Header IP Datagram n PADDING Padding (=00) code word on Row

Etc Etc column n-1 n column n PUNCTUNRING code word on Row

FEC section section FEC FEC section section 2 FEC FEC

section 3 MPE MPE section section 2 MPE MPE section section

24 DVB-H MPE-FEC protection with virtual TI 192 columns (bytes) 64 columns (bytes) IP Header IP Datagram 1 IP Header IP Datagram 2 IP Header IP Datagram 3 IP Datagram 3 IP Header IP Datagram 4 Application Frame Header Padding IP Header IP Datagram n PADDING Padding (=00) code word on Row 0 code word on Row 1 column 1 column 2 Etc FEC Frame Etc Etc Etc column n-1 n column n PUNCTUNRING code word on Row n-1n code word on Row n FEC FEC section section n-1 n-1 FEC FEC section section FEC FEC section section 2 FEC FEC section section 1 MPE MPE section section N MPE MPE section section 3 MPE MPE section section 2 MPE MPE section section 1 To TS packet slicer DVB-H Workshop -SET'05 - Sao Paulo - 22 September

25 DVB-H H data at IP level DVB-H Time Slicing for Battery saving IP datagrams of Service 3 IP datagrams of Service 2 IP datagrams of Service 1 DVB-H H data in MPE sections Service 1 IP in Section Service 2 IP in Section Service 3 IP in Section Service 1 IP in Section Service 2 IP in Section Service 3 IP in Section DVB-H H MPE-data sections in TS Service 1 Section in TS Service 2 Section in TS Service 3 Section in TS Service 1 Section in TS Service 2 Section in TS Service 3 Section in TS TS onto OFDM Time frequency frequency frequency Time-Sliced Burst Service 2 Time-Sliced Burst Service 2 DVB-H Workshop -SET'05 - Sao Paulo - 22 September

26 DVB-H Globally Helps Receivers & Networks! Power Consumption & Handover Power Consumption Reduction up to 90% Requires a 2 Mbits buffer Seamless Handover possible during off time DVB-H Demodulator IP TS Time Slicing MPE Power Control MPE FEC 8k DVB-T Demodulator ETS k 2k DVB-H H TPS RF (Receiver) C/N Performance for additional service robustness Virtual time interleaver Doppler & C/N improvements Impulse Noise interference tolerance Variable levels of robustness Network Design Flexibility & Signalling Very low additional complexity Doppler resilience improvment SFNs possible (4K equals twice 2K) Additional robust DVB-H H signalling DVB-H Workshop -SET'05 - Sao Paulo - 22 September

27 validated within the DVB-H H Validation Task Force October 2004: December 2004: Laboratory Tests in T-Systems T (Berlin) Field Trials in Telediffusion de France (Metz) May 2005: VTF report published by ETSI as TR Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

28 Digital TV to Handhelds: A challenge to access Spectrum Gerard FARIA de SOUZA NEVES (gerard.faria@teamcast.com) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

29 km/h MACH ONE MACH ONE km/h 100 km/h 10 km/h URBAN HIGHWAY TRAIN AIRCRAFT Band III COFDM can perform wonderfully in any RF Band and any Signal Bandwidth! DVB-H versus T-DMB (Max RF bands) Band IV HTHT Band V DAB III (192, ICS: 8 KHz) 2K, gi: 1/4, QPSK, cr: 1/2, 4,98 Mbps 2K, gi: 1/4, 16QAM, cr: 2/3, 13,27 Mbps DAB II (384, ICS: 4 KHz) 4K, gi: 1/4, QPSK, cr: 1/2, 4,98 Mbps 4K, gi: 1/4, 16QAM, cr: 2/3, 13,27 Mbps DAB VI (768, ICS: 2 KHz) 8K, gi: 1/4, QPSK, cr: 1/2, 4,98 Mbps 8K, gi: 1/4, 16QAM, cr: 2/3, 13,27 Mbps DAB I (1536, ICS: 1KHz) 100 MHz MHz MHz L-Band Figures from the Typical Typical DVB-H H Reference Receiver (Existing Enhanced Receiver runs at 30% higher speeds!) DVB-H Workshop -SET'05 - Sao Paulo - 22 September

30 The DVB-H H Mobile Performance Evaluation Mobile Performance Evaluator Select Channel Parameters RF Channel Bandwidth 8 MHz Segmented Bandwidth (only 1/1 1/1 standardised) Select Transmission Mode Transmission Mode 8K Elementary Period (T) 7/64 ( 109,38 ns ) ( 9,14 MHz ) RF signal Bandwidth 7,61 MHz ( Hz ) Total Symbol µs (Ts=Tu+Tg) Useful Symbol Part 896 µs (Tu) Guard Interval 224 µs (Tg) Max Differential Path 67 km (SFN TX distance) Inter Carrier Spacing 1,1 KHz ( Hz ) 50,0 db 40,0 db 30,0 db 20,0 db 10,0 db frf f D = V cos(φ) C 14,2 db DVB-T / DVB-H Mobile Performance (C/N versus Doppler) 79 Hz; 26,4 db 106 Hz; 19,6 db Rayleigh DVB-T DVB-H Guard Interval 1/4 Select Modulation DVB-T Bitrate 13,3 Mbps ( 13,271 Mbps ) DVB-T Spectrum Efficiency 1,74 b/s/hz DVB-H Bitrate 10,0 Mbps ( 9,953 Mbps ) DVB-H Spectrum Efficiency 1,31 b/s/hz TU km/h 10 Hz 100 Hz 1000 Hz Hz DVB-T / DVB-H Mobile Perfomance (Max Speed versus RF band) frf f D = V cos(φ) C DVB-T DVB-H Constellation Code Rate (available as DVB-H DVB-H H calculator on 16 QAM 2/3 QEF 14,2 db (DVB-T in Rayleigh) Mobile Penalty -9,2 db * FER 5% 23,4 db * (DVB-T in TU6) MPE-FEC Gain +6,8 db * MFER 5% 16,6 db * (DVB-H in TU6) km/h 174 MHz; 651 km/h 174 MHz; 731 km/h 470 MHz; 241 km/h 862 MHz; 131 km/h 470 MHz; 271 km/h MHz; 78 km/h 862 MHz; 148 km/h MHz; 47 km/h MHz; 88 km/h MHz; 53 km/h MHz; 29 km/h MHz; 33 km/h Select DVB-H Protection DVB-T Max Doppler 105 Hz * ( 105,01 Hz ) MPE-FEC Code Rate 3/4 MPE-FEC Gain +13 Hz * 10 km/h III IV V L S DVB-H Max Doppler 118 Hz * ( 117,91 Hz ) TU6 100 MHz MHz MHz DATA in Italic are extrapolated from other measurements. Copyright TeamCast 2005 TeamCast & DiBcom decline all responsabilities resulting from the usage of the indications provided by this Copyright DiBcom km/h DVB-H Workshop -SET'05 - Sao Paulo - 22 September MACH1 URBAN HIGHWAY TRAIN AIRCRAFT

31 Sorry, but I can t t honestly find another conclusion DVB-H Workshop -SET'05 - Sao Paulo - 22 September

Espace Performance F35769 SAINT GREGOIRE (FRANCE) +33 2 23 25 26 80 www.teamcast.com gerard.

32 Espace Performance F35769 SAINT GREGOIRE (FRANCE) gerard.faria@teamcast.com Paris Rennes Thank You for Your Attention DVB-H Workshop -SET'05 - Sao Paulo - 22 September

RECOMMENDATION ITU-R BT Error-correction, data framing, modulation and emission methods for digital terrestrial television broadcasting

RECOMMENDATION ITU-R BT Error-correction, data framing, modulation and emission methods for digital terrestrial television broadcasting Rec. ITU-R BT.1306-3 1 RECOMMENDATION ITU-R BT.1306-3 Error-correction, data framing, modulation and emission methods for digital terrestrial television broadcasting (Question ITU-R 31/6) (1997-2000-2005-2006)