WASHINGTON (AFP) - The top US telecom regulator proposed Wednesday to regulate broadband Internet service providers as "public utility" carriers, in a renewed effort to enforce "net neutrality" rules.

Federal Communications Commission (FCC) chairman Tom Wheeler unveiled the plan which aims to prevent Internet providers from playing favourites or blocking some services or allowing others to pay for "fast lanes."

The new proposal comes a year after a federal court struck down the FCC neutrality rules, saying it lacked the authority because Internet providers were not "common carriers" under US telecom law.

The plan, which is expected to unleash a fresh legal and political battle, aims to resolve the impasse by reclassifying Internet service providers as regulated entities under the 1934 Telecommunications Act.

"The Internet must be fast, fair and open," Wheeler said in an essay in Wired magazine.

"That is the message I've heard from consumers and innovators across this nation. That is the principle that has enabled the Internet to become an unprecedented platform for innovation and human expression."

Wheeler said his plan, to be submitted to the five-member commission for a vote later this month, would call for "the strongest open Internet protections ever proposed by the FCC."

He would ban "paid prioritisation," which would allow services to pay for faster connections, as well as "blocking and throttling of lawful content and services."

The move comes after President Barack Obama voiced support in November for a similar plan, arguing online services that don't pay extra fees should not be in a "slow lane."

MOBILE INTERNET, TOO

The Wheeler plan would reach deeper into the Internet, beyond consumer-facing offerings to "interconnection" services and allow the FCC to investigate alleged discriminatory practices at that level.

Wheeler said he would apply the rules to the mobile Internet for the first time as well.

"My proposal assures the rights of Internet users to go where they want, when they want, and the rights of innovators to introduce new products without asking anyone's permission."

Critics of the approach argue that the 1930s-style regulation would choke off investment in the Internet and stifle innovation.

A senior FCC official said, however, the move represents a "light touch" effort which uses only some segments of the 1934 law without imposing fees or other types regulation.

Wheeler pledged "no rate regulation" or tariffs and said his plans "can encourage investment and competition."

The "neutrality" rules aim to ensure that all services have equal access to the Internet, so that a provider such as Verizon or AT&T could not block a service such as Netflix and favour a rival like Hulu.

REACTION ON BOTH SIDES

Reaction to the plan, speculation about which has been swirling for days, was swift.

Doug Brake at the Information Technology and Innovation Foundation, a conservative think-tank, said the plan was "an unjustified, overblown response to what has in actuality been a by-and-large hypothetical concern."

Brake said the plan represents "a strong shift towards a European-style, precautionary regulation" and that it would "Balkanise the Internet into distinct private networks and specialized services."

But the digital rights group Access Now welcomed the move as a win for Internet consumers.

"The FCC's move will be felt far beyond US borders," said Access Now policy counsel Peter Micek.

"Advocates around the world - from Argentina to Turkey to South Korea to the European Union - are fighting for many of the same protections as those being proposed by Wheeler. Global policymakers can now look to the US for clues as to what will help protect all Internet users."

The Internet Association, which includes Google, Facebook and Netflix, welcomed the plan.

"We thank Chairman Wheeler for including equal treatment of wireless and fixed broadband connections in his proposal," association president Michael Beckerman said.

"There is only one Internet, and users expect that they be able to access an uncensored Internet regardless of how they connect."

The new initiative comes after the January 2014 ruling by a federal appeals court which struck down the FCC's 2010 rules on net neutrality.

But even if the new proposal is adopted, a fresh legal challenge is likely.

Verizon, which filed the earlier legal challenge, quickly criticised the new Wheeler plan.

"Heavily regulating the Internet for the first time is unnecessary and counterproductive," said Verizon vice president Michael Glover.

"It is unnecessary because all participants in the Internet ecosystem support an open Internet, and the FCC can address any harmful behaviour without taking this radical step."