Bills would boost unlicensed Wi-Fi

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limited: territorial problems on US borders, protection of TV channels

Should US decide this, it couldrapidly become a nightmare for other countries that have regulated their radio-TV spectrum. I'm not sure that Canada and Mexico will be pleased if random users setup incorrectly their WiFi transmitters, or if any company starts using such devices without taking care of immediate surrounding channels.
It may even become more a problem if such channels are not signaled as usable by a required detection mechanism. Other countries in the world would not appreciate if an American resident comes there with its material.
May be US has plenty of free TV channels. This is definitelynot the case in Europe where the available spectrum is very limited, due to international sharing of this resource, and dueto the ongoing deployment of numeric TV in simulcast.
Instead, Europe favors the deployment of WiMax in a separate band.
A bill can't be enough. There must also exist standards that limit the radiation power and distance, and clearly defines compliance levels so that no device using some channel can overlap an immediate surrounding channel used by TV. So such usage would not be permitted above 1 mW, or a few kilometers (except may be in central US within rural areas, where authorizations would still be required to allow larger emission power levels, as a way to deserve counties that can't be decently covered by cable or ADSL at reasonnable price; the deployment unit for such cells should then not exceed the size of an average country). Such system should not be tolerated in areas already covered by broadband cable and DSL accesses without prior authorization given only to accountable network operators.
It will still remain unusable on US borders without international agreement(notably near Central and Mountain regions of Canada, but near continental Mexico as well). This may then cause problems for US customers that won't knowexactly if they canor cannot use their WiFi device (don't forget car equipment for mobile WiFi...)
Those that have read technical papers about the difficulties of allocation of frequencies in Europe for the deployment of mobile numeric TV already know that it's not simple in the UHF bands I and III, and difficult for the decametric VHF band IV, and extremely difficult for the metric VHF band V.
WiFi technologies are made for mobile applications. I hope this will concern only old TV channels 1 to 4 in the old UHF band I. Leaving band III for numeric radio broadcasts (to extend and finally replace the analog FM band). Later, once the FM band is closed for analog radios, it could become an ideal position for mobile services like navigation information systems or handheld broadcasted data receivers.

Posted by: PhilippeV   Posted on: 02/21/06 You are currently: a Guest | Members login | Terms of Use

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