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Future Proofing of TETRA Networks

Future Proofing of TETRA Networks

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Future Proofing of TETRA Networks

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  1. Future Proofing of TETRA Networks Dr. M. Nouri New Technologies Senior Manager Chairman of EPT Working Group 4 (WG4) High Speed Data (HSD)

  2. Summary • Initial Planning for Expansion • Feature / Software Release Plans • Upgrade to Integrated TETRA1 Plus TETRA2 TEDS (TETRA Enhanced Data Services) • Frequency Allocation Matters • Conclusions

  3. Initial Planning for Expansion • Plan for additional switching centres • Plan for phased completion of coverage • Channel addition to base stations as traffic grows with time • Sizing of databases for the final capacity • Plan for external interfaces and their introduction time-plan • Subscriber differentiation via VPN

  4. Feature Release Plans • Identify currently available features • Confirm the upcoming feature release plans • Commercial trade-off against future functionality • Secure a realistic timetable for feature releases • Take into account the need for the TIPS process for certain features and the time impact

  5. What Services? What Data Speeds? • Is single slot TETRA1 sufficient • Do you require TETRA1 multislot operation now or in the near future • What are the likely speeds required for the future • Is low complexity low speed TEDS sufficient • Do you require medium or high speed TEDS in the future

  6. Current TETRA 1 Speeds: Multi-slot Bandwidth on demand Number of timeslots No protection Low protection High protection 1 7,2 4,8 2,4 2 14,4 9,6 4,8 3 21,6 14,4 7,2 4 28,8 19,2 9,6

  7. Two Technologies for TETRA2 HSD TETRA RELEASE 2 TAPS TEDS • TETRA Advanced Packet Service • An Overlay network • Based on the E-GPRS technology • Standardisation drafting completed • Designed for PAMR market • Not deployed to date • TETRA Enhanced Data Service • Full Compatibility with TETRA 1 • Allows migration from TETRA 1 • Standardisation in progress • 5 technologies proposed initially • Designed for all TETRA market sectors

  8. Overlay TAPS plus TETRA1 Network External IP packet data networks TETRA1 Infrastructure TAPS Infrastructure IPI EGPRS/ 3G networks TETRA1 Infra- structure ISI T2 T1 E-GPRS / 3G air interface E-GPRS/EDGE air interface TETRA1 TETRA1 Direct Mode TETRA1 Transceiver EDGE Transceiver E-GPRS Type Interfaces T2 T1

  9. TEDS Technology Parameters • Multi-carrier platform with TDMA carriers. • Adaptive selection of modulation and coding according to propagation conditions. • Agreed modulation schemes: • /4 DQPSK for common control channel • D8PSK for early migration requiring modest increase in speed • 4 QAM for efficient links at edge of coverage • 16 QAM for moderate speeds • 64 QAM for high speed • Carrier bandwidths: 25, 50, 100 and 150 kHz. • Expected user bit rates in the region of 30 to 400 kbit/s • TETRA1 higher layer protocols to be adapted for TEDS.

  10. How Do Gross Speeds Compare ? kb/s 0 150 300 450 600 750 Note: Nochannelcodingassumed. 64QAM / 150kHz 691 kb/s 64QAM / 100kHz 461 kb/s 16QAM / 100kHz 307 kb/s 64QAM / 50kHz 230 kb/s 16QAM / 50kHz 154 kb/s 64QAM / 25kHz 115 kb/s 4QAM / 50kHz 77 kb/s D8PSK / 25kHz 54 kb/s DQPSK/25kHz 36 kb/s TETRA1

  11. Integrated TEDS + TETRA1 Network External IP packet data networks Integrated TEDS plus TETRA1 Infrastructure IPI EGPRS/ 3G networks TETRA1 Infra- structure ISI T2 T2 T1 T1 E-GPRS / 3G air interface TETRA1 TETRA1 TEDS+ TETRA1 Direct Mode TETRA1 Transceiver TEDS Transceiver E-GPRS Type Interfaces T2 T1

  12. TEDS: Coverage Planning TETRA1 TEDS TEDS TEDS TEDS TEDS TEDS Model 1 Four base stations with omni-directional antennas Model 2 One base station with TEDS sectorized antennas

  13. Data • Communication • E-mail • Advanced e-mail (text, drawings, images, video) • File transfer • Forums • Voice • Communication • Voice • Voice mail • Content Delivery • News, weather, sports • Local information • In-vehicle services • Intranet access • Information search • On-line magazine/trade publications • On-line banking • E-commerce/on-line shopping • E-books download • On-line games • Music-on-demand • Video-on-demand • Travel services advertising • Job scheduling Emerging Services & Contents • Voice • Communication • Voice • Voice mail • Data • Communication • E-mail • Advanced e-mail (text, drawings, images, video) • File transfer • Forums • Hybrid • Communication • Video-telephony • Screen sharing • Content Delivery • News, weather, sports • Local information • In-vehicle services • Intranet access • Information search • On-line magazine/trade publications • On-line banking • E-commerce/on-line shopping • E-books download • On-line games • Music-on-demand • Video-on-demand • Travel services advertising • Job scheduling • Services required in TETRA networks in the near future

  14. Application IP MEX SNDCP MLE LLC MAC TEDS RF TEDS Terminal Protocol Stack Multimedia Applications in TEDS • Optional MEX layer defined for TEDS • Allows up to 8 multimedia applications • Allows QoS negotiation • Throughput • Delay • Priority • Reliability • MEX layer can be by-passed • QoS attributes can be adjusted during session Optional

  15. Frequency Planning • Frequency band allocation for TMO (national) • Frequency band allocation for DMO • Subscriber density distribution to assist channel allocation • Cell re-use factor (cluster size) • Cell sectorisation may provide benefits • Channel allocation for the final network • Availability of the spectrum for later TEDS additions

  16. Spectrum TETRA Spectrum Assignments: CEPT ERC Decisions 96 (01) and 96 (04) Possible Civil Allocations in some Countries and/or PSS Expansion band PAMR TETRA (Shared) (Country Specific) Spectrum Available Now (in most European Countries) Early Private TETRA (PMR) Adopters (Country Specific Allocations) Limited Spectrum available PMR & PAMR (Civil TETRA) (Country Specific Allocations) Limited Spectrum Available (Requires re-farming in most Countries) Emergency Services Spectrum Available Now (in most European Countries) 380 390 400 410 420 430 440 450 460 470 MHz

  17. Spectrum (contd.) (870-876/915-921MHz) PMR & PAMR (Civil TETRA) (880-890/925-935MHz) GSM Expansion Band (876-880/921-925MHz) GSM-R (890-915/935-960MHz) GSM Current Band MHz 870 880 890 900 910 920 930 940 950 960

  18. Conclusions • The TETRA standard provides a number of provisions for future proofing TETRA networks • The level of these provisions is supplier dependent • Careful planning of TETRA networks with due consideration for future growth and services results in a wiser investment • Such a network is expected to be technologically competitive for the next 20 years

  19. P rior P lanning & P reparation P revents P oor P erformance Remember 6Ps

  20. Thanks for your attention