New Google White Spaces Proposal

Google now is proposing a new way of avoiding over-the-air interference for devices it and othe companies propose be run on vacated TV frequencies.

Google has told the the Federal Communications Commission it can produce an enhanced system to prevent interference between unlicensed devices operating in slices of local spectrum not used by over-the-air TV broadcasters, and licensed broadcasters actually operational in a local market.

According to dailywireless.org, that could mean 22 to 44 6-MHz slices of spectrum in markets as large as Los Angeles or as small as Juneau, Ak.

The FCC currently is testing equipment to see if, in fact, white space spectrum can be used by low-power data devices without causing interference to television broadcasts on adjacent or non-adjacent frequencies.

Supporters of the "white space" initiative include Dell, Intel Corp, Hewlett-Packard Co. and Philips Electronics and Google.

The idea, as you might guess, is opposed by U.S. broadcasters and makers of wireless microphones, who fear the devices would cause interference.

If means can be found to identify and avoid interference, many megahertz of new spectrum with high ability to penetrate walls and buildings will be available for end user devices and signal trunking, presumably. If it can be shown that equipment can operate without interference, then application and device manufacturers will have a brand new play field upon which to operate.

Some fairly sophisticated technology will have to be developed, though, as the available white space will vary from geographic place to place. So the radios will have to be power sensing, power limiting and frequency agile.

After getting "open network" provisions adopted for C block 700-MHz networks, and then as a corollary getting Verizon and at&t more committed to similar "open networks," now Google is pushing the federal policy community to open up other significant chunks of unused spectrum for unlicensed use by any devices or services able to operate in interference-free fashion.

About which we must simply note that between them, on some levels, Apple and Google are having more impact on wireless innovation than just about everybody else put together.