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Bridging the Digital Divide: Accessing Wireless Information

Explore the impact and solutions to digital disparity through wireless technology, focusing on radio access and its benefits in various contexts. Learn about wireless transmission and cellular communication concepts. Join us in addressing global information access challenges in the Information Society.

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Bridging the Digital Divide: Accessing Wireless Information

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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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