TGV tests Wi-Fi + satellite link in three TGV trains on its Eastern network. If the experiment proves successful the new service should be generalized, from 2009, to all 52 oars network East.

With combines effort of satellite link and wireless network, in locations, such tunnels and train stations, where the satellite link cannot be established, the wi-fi network takes over to maintain the access to the Web without interruption.

French railways company SNCF previously conducted unsuccessful test using GPRS data network before launching a 2 years research and preparation program to implement this dual solution. Among technical difficulties to overcome are these related to 320 km/h TGV trains speed which causes instability and vibrations. 

The project is done in a partnership with Orange(France Telecom mobile operator), Capgemini, Alstom Transport and Eutelsat.

SNCF will put on board of its TGV a dedicated Web portal providing information about destinations, weather forecast, News, traffic information as well as a real time tracking service. From a technical point of view, TGV trains are fitted with a server where all portal content is loaded prior the journey in order to minimize bandwidth consumption due to its high cost. The tested system has been designed to provide simultaneous web connection for 14 per cent (50 users) of the total capacity of each TGV train (350).

The business plan is not defined yet, but the widespread of the system on TGV Eastern Europe network would represent an investment of 120 millions USD over 4 years. First price estimation given by SNCF Passenger service would be a flat 4-5 USD to access the Web portal during the whole journey and a 4-5 USD per hour to access the Internet.

A very interesting project and definitively a real challenge to maintain permanent web connectivity during a train journey at more than 300 km/h where the 16'000 volt power line running over the train may also create some electro-magnetic interferences and without mentioning all micro interruptions of the satellite link each time the train pass under a bridge or when dense foliage is found within the satellite's line of sight.

Any reader who already had the chance to test the reliability of the service ?

More infos (in French): Journal du Net, CNet France.

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I don't want to defend Skype after the outage their login system faced last week (16-18.08.07), as they are doing it lots better than me, but I'm amazed by the quantity of critical and harsh reactions following this unforeseen interruption of service.

I have the impression that Skype critical voices are not so loud and mean when their local ISP, mobile  operator, telephone company, electricity or any other services they subscribe, including indispensable ones such lift, coffee machine, PS3 etc..

Skype outage was the first major glitch for the last 4 years which is more than excellent record in term of reliability. During that period how many time you have not been able to send SMS, pass a phone calls and even access the Internet either from home or at work ? 

In addition, Skype took the decision to compensate their paying customers (Skype Pro, Skype Unlimited,
SkypeIn or Skype Voicemail customers) by extending their subscription for 7 days in a goodwill gesture.

What I would propose is to spead the word among all Telco's and ISP (to start with) that automatic compensations are most welcome whenever they are not able to deliver the service we are paying for (perfect example of bad ISP behavior in Switzerland, video in French). 

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