1. ‘Unlocking the Band’ ‘Unlocking the 28GHz Band’ Matt Hobby – System Engineer

2. The Last Mile Last Mile City - Urban Suburban Rural Local Loop End UserPoint of Presence

3. Existing Technologies ADSL+ Low Cost- Future Proof Satellite+ Nationwide Coverage -Latency -Cost/ Contention Leased Line+ Speed- Rollout Cost LIBRA

4. Low-cost Internet Broadband Radio –Licensed 28 GHz spectrum –40 km radius super-cell –Uses conventional BFWA equipment –15,000 uncontended symmetric connections –Places a 30m mast within 1 km of every subscriber

5. Satellites, HAPs, LAPs & Towers Satellite @ 300+ km HAP @ 21 km LAP @ 1.5 km Tower @ 0.3 km

6. Like a HAP but...... Based on existing technology Station keeping guaranteed by tether Power requirements guaranteed Spectrally efficient backhaul via tether Low cost!

7. Equivalent Tower Model Aerostat CPE Free Space region 30 m mast

8. Shadowing & LOS 80%+ LOS @ 40 km

9. The Link Budget Extremely High Gain BS antenna QPSK modulation Standard 60 cm CPE dish @ boundary 99.9% availability Rain band F assumed

10. Technology

11. Trials

12. Target Cost to End User > 2 Mbit/s Uncontended Symmetric ~ £300 per link to Network Operator End User cost of ~ £350

13. Roadmap Integrate payload Commercial demonstrator Full system deployment April 2003January 2004 January 2005

14. Conclusion LIBRA The LONG TERM solution for Broadband Britain !

16. Aerostat Advantage @ 1 km