Cost 286 Hamburg, 25-26/11/20041/16 Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric.

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Presentation transcript:

Cost 286 Hamburg, 25-26/11/20041/16 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, 25-26/11/20042/16 Introduction Using Wireless LAN in a railway carriage - Presenting the place of measurements - Result of the measurement - Conclusions - Future plans (realisation) - Introducing the used devices - Why we need this?

Cost 286 Hamburg, 25-26/11/20043/16 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, 25-26/11/20044/16 Used devices We need an Access Point, WLAN card, spectrum analiser -Access point (router), IEEE g 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, 25-26/11/20045/16 Place of measurement West-Hungary, Sopron Main railway station of GYSEV/ROeEE

Cost 286 Hamburg, 25-26/11/20046/16 Environment

Cost 286 Hamburg, 25-26/11/20047/16 Trains Bp type IC carriage Bpy type 1st & 2nd class carriage

Cost 286 Hamburg, 25-26/11/20048/16 Seat location Bp type carriage (1 part) Bpy type carriage (3 part)

Cost 286 Hamburg, 25-26/11/20049/16 Measurements (Bp) Bp type carriage (1 part)

Cost 286 Hamburg, 25-26/11/200410/16 Measurements (Bpy) Bpy type carriage (3 parts)

Cost 286 Hamburg, 25-26/11/200411/16 Some spectrum

Cost 286 Hamburg, 25-26/11/200412/16 Some spectrum

Cost 286 Hamburg, 25-26/11/200413/16 Some spectrum

Cost 286 Hamburg, 25-26/11/200414/16 Some spectrum

Cost 286 Hamburg, 25-26/11/200415/16 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, 25-26/11/200416/16 Thank you for your attention!

Cost 286 Hamburg, 25-26/11/200417/16 Next step Internet Downlink: from satellite Uplink: GSM/GPRS – for test only 450 MHz data link