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B. MARTIN (beatrice.martin@space.alcatel.fr)

Satellite Digital Multimedia Broadcast system : a new tool for Public Protection Disaster Recovery. B. MARTIN (beatrice.martin@space.alcatel.fr). Workshop on Broadband Wireless Ad-Hoc Networks and Services, 12th - 13th September 2002, ETSI, Sophia Antipolis, France. S-DMB for PPDR.

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B. MARTIN (beatrice.martin@space.alcatel.fr)

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  1. Satellite Digital Multimedia Broadcast system : a new tool for Public Protection Disaster Recovery B. MARTIN (beatrice.martin@space.alcatel.fr) Workshop on Broadband Wireless Ad-Hoc Networks and Services, 12th - 13th September 2002, ETSI, Sophia Antipolis, France

  2. S-DMB for PPDR • Introduction • S-DMB System concept • Applications • User Equipment • Radio Access Network • S-DMB flexibility • System capacity • Conclusion

  3. Introduction • S-DMB is based on 3GPP UTRA FDD W-CDMA • re-use of chipset and radio protocol technology • re-use of network infrastructure equipment • re-use of 3GPP handsets with minor adaptation • Mass marketed communication medium where • terrestrial coverage not deployed for business attractiveness reasons • terrestrial system suffered environmental damages • terrestrial network requires complementary coverage • Low to high data rate broadcast, point to point, location services • IMT-2000 Mobile Satellite Service (MSS) frequency band • Based on a dedicated high power geo-stationary satellite

  4. S-DMB System concept - Radio Access Architecture • S-DMB is operable on its own • Frequency bands • Full reuse of 3GPP UTRA FDD W-CDMA waveform • all the cells use the same frequency spectrum (full frequency reuse) • no frequency planning requirement

  5. S-DMB System concept - Radio Access Architecture : "On its own configuration" • Network infrastructure with fully standardized 3GPP equipment: Node B, RNC, OMC • Suitable for rural, suburban and urban when the handset is visible from the satellite

  6. S-DMB System concept - Radio Access ArchitectureFull coverage with Gap Fillers • Situations where the handset is not visible from the satellite (blockage by buildings, indoor penetration, etc.) • network of Gap Fillers : signal repetition within a terrestrial coverage

  7. S-DMB System concept - Radio Access ArchitectureGap Fillers • Gap Fillers : • Repetition and transparent amplification in the MSS band • Synchronous transmission of the same content over the same code at the same frequency • UE Rake receiver combination of the terrestrial and satellite signals • 1 carrier reused in all the spots • no terrestrial frequency planning requirement • fast deployment • low power/low cost 3GPP equipment • may be co-located with 3GPP terrestrial Node Bs

  8. S-DMB System concept - System coverage • One geostationary satellite,12 meters antenna diameter • European + North Africa coverage : 44 individual spots30 spots for restriction to Europe • 200W per spot • Handset elevation :16 to 42°

  9. Regulatory issues • Joint support of : • European Commission • European Space Agency (ESA) • French Space Agency (CNES) • ETSI : Work item SES-00078  Evaluation of W-CDMA UTRA FDD as an IMT-2000 Satellite Radio Interface • ITU-8F : on going action for S-DMB scenarios proposal in the IMT-2000 extension band

  10. S-DMB Applications Primarily designed for mass market standard commercial purpose Also designed for Public Protection and Disaster Relief Missions • Early warning and public alert : • Emergency telecommunication services • Mobile network infrastructure back-up • Government institutional communication tool in case of disaster • Assistance, Search And Rescue (SAR) • Global Monitoring for Environment and Safety (GMES) • Other Location Based Services

  11. S-DMB User Equipment • S-DMB basic handset = 3G class 3 handset (250 mW) with adaptation for frequency agility to MSS • Possibility to transmission power and antenna gain boosting

  12. S-DMB data rates • Forward link : low data rate (~1.5 kbps) to high data rate (384 kbps) • Return link : due to transmit poser limitations, depending on • S-DMB User Equipment configuration • S-DMB User Equipment location in the satellite spot (i.e. elevation) • in any case, minimal low data rate service (Short Message Service) (assumption : 30° average UE elevation, 10 dB link margin)

  13. Radio Access Network - S-DMB channelsMinimum set of 3GPP channels

  14. Radio Access Network - Protocol stack for SMS

  15. Radio Access Network - Protocol stack for Broadcast/Multicast

  16. S-DMB flexibility • Transmission resources pre-emption by authorised organisation: • on a spot basis or • on a subset of radio resources (W-CDMA code tree) • ordered at OMC level • Possibility to focus satellite power on a restricted regional area • Support of redundancy (gateway geographical dispatching • Dynamic priority management (subscriber classes) • Support of data encryption • Support of time diversity

  17. System Capacity • 1900 simultaneous transfers, • 827 SMS/second • Maximum transfer delay : 6.8 s • SMS : • Forward Link • Return Link

  18. Conclusions • Full compatibility of S-DMB with UTRAN FDD W-CDMA • S-DMB handset = 3GPP handset + MSS frequency agility • 3GPP network infrastructure (Node B, RNC, OMC,…) • reduce production costs • 3GPP handsets = S-DMB UEs scattered • S-DMB UEs are in ownership of people at the moment of emergency situation • Easy preemption for security mission • Radio resource distribution to focused geographical areas • S-DMB may be deployed for commercial use and pre-empted for Public Protection Disaster Recovery mission • Fast deployment

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