LS Seminar day Lichtenau,12 June 2002 A new international DVB-T Frequency Plan J Doeven www.nozema.nl
Need for International Agreements Equitable access Avoiding unacceptable interference Possibilities for development Co-ordination Similar number of services for all countries Preservation of frequency rights Why a new frequency plan? Frequencies can be put into operation at anytime Common criteria and methods for calculating interference And do we need Bi-lateral agreements between administrations a-priory affected plans by at interference all? Modification rules Consultation with affected countries First Agreement: LF/MF Plan Prague 1929 2
Stockholm Agreement 1961 38 countries 26 May-22 June 1961 ST61 ITU agreement Treaty status Rules and procedures Plan (detailed list of stations) ~5500 BESK television electronic computer stations used for verifying the plan Station name Co-ordinates Frequency Frequency offset System Antenna height Radiated power Polarisation Antenna pattern Now : > 85000 analogue television stations in operation 3
ST61 DVB-T Introduction Does not prohibit use of bands concerned to DVB-T Additional administrative and technical rules for frequency co-ordination are necessary CH97 Future Gives mechanism for DVB-T introduction Is multilateral agreement under auspices of CEPT Enables early DVB-T introduction Provides essential experience in DVB-T co-ordination CH97 is not the optimal solution for all-digital broadcasting Need for complete re-planning: CEPT asked ITU for revision of ST61 New plan will also cover Africa & Middle East 4
Tasks for the Conference 1 st Session May 2004; 3 weeks Formulating requirements Planning exercises (ITU software) Preliminary coordinations 2 nd Session 2005; <=5 weeks Intersessional period Report Agreement Planning criteria and method Method of transition protection of analogue protection of existing digital In June 2001 the ITU Council decided on the agenda for the Digital conference to revise Broadcasting ST61. Process of submitting requirements Frequency Plan Procedures 174-230 MHz T-DAB & DVB-T 470-862 MHz DVB-T Modifications and additions Transition to digital Sharing with other services 5
Post Conference Actions 2 nd Session of Conference; 2005 Multilateral agreements: Transition to new plan Planning of low power DVB-T applications National plans for: Modifying DVB-T tx Switch off analogue tx End of transition in [2020?] Transition period New Agreement Analogue television plan Migration procedure All analogue television switched off Only DVB-T DVB-T & T-DAB VHF-plan DVB-T UHF-plan 6
Service Requirements Indoor Mobile reception reception Flat panels Return path Results from Digitag Important in each market, but requires high field strength The new plan will be used in High the next decades and should therefore High take account of future needs Widespread interest, but requires high field strength Seen as very important, but needs 2 times higher bitrate Essential for new interactive services Impact on spectrum High Lower coverage or less services may need to be accepted Low Only few networks with reduced bitrate may be possible Additional demand on spectrum or less services Mainly via UMTS/GSM or ADSL/PSTN 7
Results from Digitag Market Conditions Market Market Characteristic Most important As far as possible Cable Cable dominated dominated DVB-T portableis indoor USP is USP Portable indoor reception Number of services Mixed Mixed (C, S, T) (C, S, T) Most competitive environment High number of services Extend of coverage Terrestrial delivery dominated Full coverage is a must Universal coverage Portable indoor reception 8
Results from Digitag Capacity Total Mbits/s 350 300 250 200 150 100 50 0 EBU studies respondent mobile portable fixed Concentration in range 100 150 Mb/s On average a need for 6-7 multiplexes for: Fixed Portable Combination of Fixed Portable Mobile Average demand could be achieved by using almost all of the VHF/UHF BC-bands in most countries Unlikely to satisfy maximum demand in most areas 9
ST61 revision is probably the single most important event Finally broadcasting for next 5 years or more Key issues for success Submission of future proof requirements Flexible planning method Availability of whole VHF/UHF broadcast bands in most countries Switching off of analogue television Thank you for your attention 10