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Introduction

Introduction. Information Society. Our Civilisation, Culture Social order, Safety, Security Business, Wealth, etc. based on accessing & using information gathering, processing, disseminating … . Information Format . Texts Pictures Sounds Data. All translated into digital format

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Introduction

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  1. Introduction Property of R. Struzak

  2. Information Society • Our Civilisation, Culture • Social order, Safety, Security • Business, Wealth, etc. based onaccessing & using information • gathering, • processing, • disseminating … Property of R. Struzak

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

  7. 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 Radio Wavescarry information 300’000 km/s to fixed & mobile users Transmission medium Transmitting station Receiving station Property of R. Struzak

  8. 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 TR RR Wireless Or Cable? TC RC Property of R. Struzak

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

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

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