1. 27/01/2003Property of R. Struzak 1 Introduction

2. 27/01/2003Property of R. Struzak 2 Information Society Our Civilisation, Culture Social order, Safety, Security Business, Wealth, etc. based on accessing & using information –gathering, –processing, –disseminating …

3. 27/01/2003Property of R. Struzak 3 Information Format Texts Pictures Sounds Data All translated into digital format Less expensive More practical

4. 27/01/2003Property of R. Struzak 4 Access to Information – a Key Problem of Humanity Report Of The UN Secretary General, 2000 World Summit on Information Society (WSIS) 2003, 2005 Multitude of conferences, programs, action plans… http://www.un.org/millennium/sg/report/full.htm www.itu.int/wsis

5. 27/01/2003Property of R. Struzak 5 Digital Divide There is a large disparity as concerns the access to information, within each country and among countries. This “Digital Divide” creates new problems –Political, –Regulatory, –Financial, –Organizational, –Technical that require new solutions Everybody who understands the problem should contribute as much as he/she can to bridging that gap

6. 27/01/2003Property of R. Struzak 6 Hope in Radio Access Use of radio to access world-wide web potentially offers enormous benefits –in low-density population areas ( no satisfactory telecom infrastructure ) –in developing countries ( no satisfactory telecom infrastructure ) –in solving the ‘last-mile’ problem (highest cost, least bandwidth) –in solving the access problem for nomadic users Radio for Mobile and Fixed applications –point-to-point –point-to-multipoint –cellular technologies

7. 27/01/2003Property of R. Struzak 7 Radio Waves carry information 300’000 km/s to fixed & mobile users Transmitting station Transmission medium Receiving station Ubiquitous - accessible at any place, any time…* No cable production/ transport/ warehousing… Fixed and mobile uses… Free, no right-of-way- no deployment/ installation/ maintenance… Indestructible - no theft, snow, wind, flood, earthquake, tornado, trees… *Over the Earth’s surface

8. 27/01/2003Property of R. Struzak 8 Wireless Or Cable? Wireless technologies use electromagnetic waves (radio, infrared, laser, visible light (and acoustic energy)) in place of wires/cables. Reasons (for other than nomadic/ mobile uses) –Deployment time –Cost factor Investment cost –TC + RC + Cables + Auxiliary equipment + Deployment cost –TR + RR + Antennas + Auxiliary equipment + Deployment cost Maintenance/ operation costs during the life-span of the system Compared with total benefits over the whole life-span of the system TCTC RCRC TRTRR

9. 27/01/2003Property of R. Struzak 9 Cellular communication concept Access to base station Interconnection to global public network Common standard PSTN Interconnection Cell

10. 27/01/2003Property of R. Struzak 10 IMT-2000 Cells: Macro to Pico Satellite Macrocell Microcell Urban In-Building Picocell Global Suburban Basic Terminal PDA Terminal Audio/Visual Terminal

11. 27/01/2003Property of R. Struzak 11 Aim of the Lectures We shall review basic topics related to radio links and only touch on more advanced issues. (To cover any of the many topics in detail, one would need much more time.) Beware of misprints! These are just my rough notes for lectures!