|04-25-2005, 02:11 PM||#1|
Join Date: Aug 2003
Device: Dell Axim
Surf wirelessly on the train at over 300km/h
The 21Net system architecture is based on two-way Ku-band satellite transmission to provide connectivity between the internet backbone and a master server on the train. Direct reception of satellite television channels on the same satellite is also possible. A hub earth station provides the connection from the backbone (and from the network operations center) via the satellite directly to a low-profile tracking antenna on the train. GPRS and Wi-Fi access between the train and available networks (e.g. in stations and in tunnels) is also provided. On the train, Wi-Fi connections are used between the master server and customers with Wi-Fi enabled laptops and PDAs.
One major advantage of 21Net over Boeing's Connexion system is that the Ku-band antenna is considerably cheaper than Connexion's $1.3m USD phase array antenna.
Click here for the full press release, and here for more information on ThalysNet.
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