[ شرح ] FCC officially frees TV white space spectrum
 

The Federal Communications Commission today unanimously approved new rules for the use of

unlicensedFinal Fantasy XIV Gil white

space spectrum in a move that could pave the way for more unused wireless spectrum to be

released in the future.
http://i.i.com.com/cnwk.1d/i/tim/201.../phoneData.jpg
White space is unused spectrum that sits between TV channels. The 300MHz to 400MHz of

unused spectrum is considered prime spectrum for offering wireless broadband services

because it can travel long distances and penetrate through walls. The FCC unanimously

agreed in November 2008 to open up this spectrum for unlicensed use. Even so, technical

issues to allow device makers and service providers to use the spectrum still need to be

worked out.

The latest vote to approve the use of white spaces now paves the way for service providers

and device makers to begin designing products that take advantage of the spectrum.

Companies like Google, Microsoft, Dell, Motorola, and Hewlett-Packard have lobbied for

years to get this spectrum open for public use.

The roll out of TV white space spectrum might also serve as a template for freeing other

underutilized spectrum.

"Aboutbuy ffxiv gil 90 percent of the

licensed spectrum is unused," said Joe Hamilla, chief operating officer at Spectrum Bridge,

a company that runs an online spectrum license exchange. "What's happening with TV white

space is really the FCC's first attempt at trying to make more efficient use of underused

spectrum."

As part of the new rules adopted today, the FCC agreed to set aside two channels for

wireless microphone use to mitigate potential interference issues. But the commission said

it would not require device makers to include geolocation spectrum sensing technology in

new devices to ensure that these products don't interfere with existing services already

using the spectrum. This is a key win for device makers, because it means that they do not

have to include the potentially expensive technology in their products.

Instead, devices will query a special geolocation database that makes sure no one is using

that spectrum before it transmits. This database check is largely to prevent white space

services from interfering with broadcast TV signals.

The FCC's Office of Engineering and Technology will get the database up and running. It

will also FFXIV Gilselect

companies that will manage the database going forward. Companies, such as Google and

Spectrum Bridge, have submitted proposals for managing the database.