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Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric Power Engineering Possibility of wireless communication in a railway carriage. Ferenc GAZDAG, assistant lecturer János LÖCHER, research engineer György VARJÚ, professor.

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Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

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  1. Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric Power Engineering Possibility of wireless communication in a railway carriage Ferenc GAZDAG, assistant lecturer János LÖCHER, research engineer György VARJÚ, professor Cost 286 Hamburg, 25-26/11/2004

  2. Introduction Using Wireless LAN in a railway carriage - Why we need this? - Introducing the used devices - Presenting the place of measurements - Result of the measurement - Conclusions - Future plans (realisation) Cost 286 Hamburg, 25-26/11/2004

  3. Internet on the train The reasons to deal with WLAN inside a carriage -plan for managers to use their notebooks during the travel -mainly based on IC and EC (Inter and European City train) -the wired solution has too many problems phisycal connection (can be damaged) fixed number of users Cost 286 Hamburg, 25-26/11/2004

  4. Used devices We need an Access Point, WLAN card, spectrum analiser • Access point (router), IEEE 802.11g • SMC 2804WBR, 100mW • WLAN card in the notebook • SMC 2835W (802.11g) • HP PCMCIA (802.11b) -spectrum analyser (HP8594E) with an antenna Cost 286 Hamburg, 25-26/11/2004

  5. Place of measurement West-Hungary, Sopron Main railway station of GYSEV/ROeEE Cost 286 Hamburg, 25-26/11/2004

  6. Environment Cost 286 Hamburg, 25-26/11/2004

  7. Trains Bpy type 1st & 2nd class carriage Bp type IC carriage Cost 286 Hamburg, 25-26/11/2004

  8. Seat location Bp type carriage (1 part) Bpy type carriage (3 part) Cost 286 Hamburg, 25-26/11/2004

  9. Measurements (Bp) Bp type carriage (1 part) Cost 286 Hamburg, 25-26/11/2004

  10. Measurements (Bpy) Bpy type carriage (3 parts) Cost 286 Hamburg, 25-26/11/2004

  11. Some spectrum Cost 286 Hamburg, 25-26/11/2004

  12. Some spectrum Cost 286 Hamburg, 25-26/11/2004

  13. Some spectrum Cost 286 Hamburg, 25-26/11/2004

  14. Some spectrum Cost 286 Hamburg, 25-26/11/2004

  15. Conclusions -it can be work, with some restrictions avoid two AP-s workin in each other range, HW/SW find possible EM noise sources -the field is strong enough outside the carriage -the transfer rate is not a real function of the field strength -the effect of the human presence must be investigate Cost 286 Hamburg, 25-26/11/2004

  16. Thank you for your attention! Cost 286 Hamburg, 25-26/11/2004

  17. Next step Internet Downlink: from satellite Uplink: GSM/GPRS – for test only 450 MHz data link Cost 286 Hamburg, 25-26/11/2004

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