1、 ETSI TR 102 401 V1.1.1 (2005-05)Technical Report Digital Video Broadcasting (DVB);Transmission to Handheld Terminals (DVB-H);Validation Task Force ReportEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TR 102 401 V1.1.1 (2005-05) 2 Reference DTR/JTC-DVB-174 Keywords br
2、oadcasting, digital, DVB, DVB-H, IP, terrestrial, TV, video ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Impo
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6、art may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. European Broadcasting Union 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Mar
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8、V1.1.1 (2005-05) 3 Contents Intellectual Property Rights6 Foreword.6 Introduction 6 1 Scope 9 1.1 Major findings 9 1.2 Interoperability: fully verified 9 1.3 Performance assessment: better than expected.10 1.4 Field trials: confirmation of laboratory tests 10 1.5 Further work needed.10 2 References
9、11 3 Definitions and abbreviations.11 3.1 Definitions11 3.2 Abbreviations .12 4 Interoperability tests.13 4.1 List of Equipments .13 4.2 Interoperability of Contribution equipments 13 4.2.1 IP source set up.14 4.2.2 IP encapsulator set up .14 4.2.3 Multiplexer set up .15 4.2.4 Delta_T jitter evaluat
10、ion .15 4.2.5 DVB-H multiplex recording .17 4.2.6 Verification of the DVB-H records.18 4.3 Interoperability of Distribution equipment.18 4.3.1 SFN Interoperability Tests19 4.3.2 MFN interoperability tests 20 4.4 Interoperability tests conclusion.20 5 Performance measurements23 5.1 Laboratory measure
11、ments performed.23 5.2 DVB-T versus DVB-H.23 5.3 MPE-FEC coding rate influence 24 5.4 Transmission mode influence.24 5.5 Absolute burst duration influence 24 5.6 Performance measurements conclusions 25 6 Field trials.30 6.1 Field trials performed .31 6.2 Mobile in-car reception 31 6.3 Pedestrian out
12、door reception 33 6.4 Pedestrian indoor reception35 6.5 Field trial conclusions 35 7 DVB-H VTF conclusions.36 Annex A: Test methodology 37 A.1 DVB-H VTF test bed .37 A.2 VTF Test Bed presentation.37 A.2.1 Contribution part 38 A.2.2 Distribution part .39 A.2.3 Transmission part .40 A.2.3.1 Propagatio
13、n channel profiles.40 A.2.3.2 Impulse noise tests41 A.2.4 Receiver part 41 ETSI ETSI TR 102 401 V1.1.1 (2005-05) 4 A.3 DVB-H VTF laboratory tests .42 A.3.1 IT: Interoperability tests .43 A.3.1.1 Network equipment interoperability.43 A.3.1.1.1 Contribution and distribution equipment 43 A.3.1.1.2 Dist
14、ribution Equipment.43 A.3.1.1.3 Transmission equipment .44 A.3.1.2 Test bed and receiver Interoperability 44 A.3.1.2.1 Interoperability at the RF level44 A.3.1.2.2 Interoperability at the Service level 45 A.3.1.2.3 Receiver “wake-up“ time 45 A.3.2 PM: Performance Measurement .46 A.3.2.1 PM: C/N vers
15、us Doppler.46 A.3.2.2 PM: Channel profiles47 A.3.2.3 Quality of restitution criteria.48 A.3.2.4 MPE-FEC coding rate.48 A.3.2.5 Absolute burst duration.49 A.3.3 PM: Prioritization of tests.50 A.3.3.1 Network formats .51 A.3.3.2 Transmission and service formats.52 A.4 List of tests .52 A.4.1 Interoper
16、ability Test .52 A.4.2 Performance measurements52 A.4.2.1 Comparison of DVB-H with DVB-T in mobile situations .52 A.4.2.2 Influence of burst duration53 A.4.2.3 Influence of MPE-FEC coding rate 53 A.4.2.4 Influence of Transmission Modes.53 A.4.2.5 Influence of In-Depth interleaver53 A.4.2.6 PM: Synth
17、esis .54 A.4.2.6.1 Service formats .54 A.4.2.6.2 Transmission formats55 A.5 Impulse noise tests .55 Annex B: Field trials methodology.58 B.1 Objectives of field trials .58 B.1.1 Types of field trials.58 B.1.2 Types of Analysis.58 B.1.3 Class of reception mode .59 B.1.4 Configurable parameters 59 B.2
18、 Measurement criteria and failure point.60 B.2.1 Measurement criteria for DVB-H validation testing 60 B.2.1.1 MPE FER/MPE MFER.60 B.2.1.2 Measurement interval 60 B.2.2 Measurement criteria for DVB-H network planning60 B.3 Measurement set-up .61 B.3.1 Transmission set-up61 B.3.2 End-to-End system tes
19、ting61 B.3.3 Mobile in-car reception 62 B.3.4 Pedestrian outdoor reception 62 B.3.5 Pedestrian indoor reception63 B.3.6 Requirements on the terminal.64 B.4 Raw data analysis methodology.64 B.4.1 TEST #1: Derivation of required C/N 64 B.4.1.1 Required measurements64 B.4.1.2 Processing of measurements
20、.64 B.4.1.3 Analysis 64 B.4.1.4 Results 65 B.4.2 TEST #2: Derivation of required received input power .66 B.4.2.1 Required measurements66 ETSI ETSI TR 102 401 V1.1.1 (2005-05) 5 B.4.2.2 Processing of measurements.66 B.4.2.3 Analysis 66 B.4.2.4 Results 67 B.4.3 TEST #3: Derivation of the maximum spee
21、d.67 B.4.3.1 Required measurements67 B.4.3.2 Processing of measurements.67 B.4.3.3 Analysis 68 B.4.4 TEST #4: Derivation of coverage maps .68 B.4.4.1 Required measurements68 B.4.4.2 Processing of measurements and visualization.69 B.4.5 TEST #5: Calibration of network predictions 69 B.4.5.1 Required
22、measurements69 B.4.5.2 Processing of measurements and visualization.69 Annex C: Lab tests - raw data.71 Annex D: Field trials - Raw data 74 Annex E: List of equipment 89 E.1 Laboratory tests89 E.2 Field trials.90 Annex F: Credits91 History 92 ETSI ETSI TR 102 401 V1.1.1 (2005-05) 6 Intellectual Prop
23、erty Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); E
24、ssential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches,
25、has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by Joint T
26、echnical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). The present document is supplementary to the earlier document TR 101 190 4. The present document exte
27、nds the scope of the implementation guidelines to include handheld reception as defined by EN 302 304 1. Many of the items specified in TR 101 190 4 are not reproduced in the present document, as they are already available, even though they may be relevant to the implementation of a DVB-H network. N
28、OTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the
29、standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 coun
30、tries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Founded in September 1993, the DVB Project is a market-led consortium of public and private sector organizations
31、 in the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters market-led systems, which meet the real needs, and economic circumstanc
32、es, of the consumer electronics and the broadcast industry. Introduction The DVB-H transmission system, targeting Handheld Terminals, is defined by a series of features whose detailed specifications are embedded in various DVB standards: DVB-DATA (EN 301 192 7), DVB-SI (EN 300 468 5), DVB-T (EN 300
33、744 3). The overall transmission system is specified by the DVB-H standard itself (EN 302 304 1) together with the DVB-H Implementation Guidelines. Following the standardization work occurring in 2003 and 2004, the DVB-H ad-hoc group of the DVB Technical Module decided to perform a validation exerci
34、se through Laboratory Tests and Field Trials, during the last quarter of 2004. The main objectives of this exploratory work were to assess the Interoperability of early DVB-H implementations and to explore the technical performance provided by DVB-H to the Handheld Terminals. The laboratory tests in
35、cluded 25 pieces of equipment from 10 different manufacturers (including 8 DVB-H prototype receivers) and involved 12 companies and 30 participants. ETSI ETSI TR 102 401 V1.1.1 (2005-05) 7 Network equipment and receiver equipment interoperability were both explored, in all network configurations (i.
36、e. MFN / SFN, Hierarchical / Non-hierarchical) and all transmission modes, including the DVB-H 4K mode and the in-depth interleaver provided for 2K and 4K transmissions. The Interoperability tests were very successful, confirming a common interpretation of the DVB-H standards portfolio. Interoperabi
37、lity tests revealed the different multiplexing strategies to create the DVB-H service multiplex (i.e. IP encapsulators) which, whilst remaining fully compliant with the standard, provided different means of flexibility to trade-off power saving (i.e. time slicing parameters) and service access time
38、(i.e. periodicity of the service bursts). The interoperability tests also demonstrated full compliance and full interoperability between the modulators and receivers for all possible transmission modes offered by the extended DVB-T physical layer. The most awaited study performed by the validation t
39、ask force was the performance measurements. The tremendous combinations of Transmission and Services formats, highlighting the incredible flexibility provided by DVB-H, made exhaustive measurements impossible, but focusing on the most probable combinations, the DVB-H Validation Task Force obtained v
40、ery impressive results in the laboratory tests (confirmed by the field trials), sometimes outperforming the expectations. DVB-T versus DVB-H Mobile reception The additional protection offered by DVB-H at the service level by the MPE-FEC, provides DVB-H transmissions with a 6 dB advantage at medium s
41、peed (even more in high speed), whilst making the DVB-H service availability quasi independent of the receiving speed. Also, the MPE-FEC provides the demodulators with the ability to increase the maximum speed limit, or Doppler Noise resilience, at which the DVB-H service remains available. Thanks t
42、o the MPE-FEC, the DVB-H transmission performance, assessed both in the laboratory and in the field, offers a similar improvement in C/N performance to that obtained in DVB-T receivers using antenna diversity (6 dB to 9 dB). The influence of DVB-H parameters: MPE-FEC coding rate The use of MPE-FEC (
43、3/4) offers a spectacular improvement of the DVB-H coverage in general but the laboratory tests showed a small variation of the C/N gain (i.e. about 3 dB) when MPE-FEC coding rate varies from low (7/8) to high (1/2) values. In MPE-FEC (7/8) the results from the field trials were worse than in the la
44、boratory, suggesting that the range of C/N gain is more proportional to the MPE-FEC overhead/coding rate. Nevertheless, in all cases, the impressive C/N gains and the speed advantage provided by the MPE-FEC protection, have been confirmed in the laboratory and in the field. The influence of DVB-H pa
45、rameters: Transmission Format (FFT size) Additional measurements have confirmed the strong link between the FFT size and the speed limit characteristic of the transmission. As a direct consequence of the inter-carrier spacing, the maximum speed in 2K transmissions is four times the 8K transmission o
46、ne. This has been verified with and without the MPE-FEC protection. It is expected that the new 4K mode will fit exactly in between the 2K and 8K modes providing broadcasters with a new trade-off between transmission cell size and receiving speed. The influence of DVB-H parameters: Service Format (b
47、urst shape) The DVB-H burst shape (i.e. absolute duration of the service burst) has a strong influence on pedestrian receiving situations (i.e. below 10 Hz Doppler). The virtual time interleaving implemented in the MPE-FEC transmission scheme, provides a smoothing of any flat fading channels when th
48、e burst duration is sufficiently long with respect to the channel time-variations. Thus MPE-FEC protection efficiency is reinforced by long burst duration for low Doppler values (low speeds/pedestrian case) while burst lengths seems less important as Doppler values increase (high speeds/mobile case)
49、. Nevertheless, concerns remain about the suitability of the TU6 channel profile used in the laboratory to simulate pedestrian situations as the field trials gave different results for this case. This suggests further work is necessary to evaluate the DVB-H performances in the “pedestrian“ cases. ETSI ETSI TR 102 401 V1.1.1 (2005-05) 8 The influence of DVB-H network topology Unfortunately, the lack of time did not allow measurements of the performance of DVB-H transmissions using Hierarchical Modulation and Single Frequency Networks (SFN). However, the fie
