Steve Perlman believes his company's pCell technology will revolutionize
the wireless industry, eliminating congestion, dead zones, and
unreliable connections.
Steve Perlman says his latest startup is reinventing wireless.
(Credit:
Artemis Networks)
Serial entrepreneur Steve Perlman claims that his new patented technology can create the wireless network of our dreams.
His invention, pCell, theoretically delivers on the long-sought dream
of ubiquitous, fast Internet, with the reliability and consistency
previously only achievable through a wired connection. pCell is
"effectively mobile fiber," he announced in a press release for his new
company,
Artemis Networks.
The technology turns conventional wisdom about wireless technology on
its head. pCell, which stands for "personal cell," exploits
interference rather than avoiding it as in conventional wireless
networks.
In cellular networks, a tower transmits a radio signal creating a
cell, which has to avoid any interference with other cells. Cell tower
capacity is shared among mobile devices, taking turns to avoid
interfering with one another. With the growing number of devices and
increased data demands, cell service can degrade, even with technologies
like
MIMO and
beamforming, which are tricks to squeeze the most capacity out of limited spectrum.
If you are at a stadium or train station with a
high density of users all communicating at once, the cell works by
giving every user a turn with a finite amount of throughput. If 100
people are sharing spectrum, people near the cell will get the full
bandwidth, and those on edge a slower data rate.
(Credit:
Artemis Networks)
Artemis and Perlman have a different take on those limitations.
"This is a tubes to transistors breakthrough. We are looking at the
problem from a different point of view," Perlman said. "If you have 10
or 100 phones taking turns, we are simultaneously using all channels at
once. We figured out how to synthesize a tiny bubble around your mobile
device."
Instead of avoiding interference, pCell technology embraces it,
combining radio signals transmitted from multiple pCell base stations to
synthesize pCells about a centimeter in size around each mobile device.
These pCells are like tiny air bubbles that direct a full amount of
wireless capacity into a device, amping up its speed. As a result of the
personal pCells, users aren't waiting for their turn and aren't
competing for limited spectrum.
pWave access points offer can use fiber and line of sight to transmit data.
(Credit:
Artemis Networks)
pCell is based on DIDO (Distributed-Input-Distributed-Output)
technology, a cloud wireless system dependent on DIDO data centers
running on industry-standard processors and Linux, according to a
white paper (PDF)
by Perlman and chief scientist Antonio Forenza. It's those data centers
that are key: they're able to separate traffic from different devices
into multiple channels, allowing them all to use the maximum amount of
wireless capacity without butting heads. The traffic gets shuttled to
each mobile device via pCell access points, which the company dubbed
pWaves.
pCell's access points also work via line of sight and in random
patterns, which can reduce costs of transmitting to the data center.
Increasing capacity involves adding more pWaves, and the limit is on
what the device can receive. An iPhone with dual antennae can receive up
to 70 megabits per second per antennae. pCell can also run LTE and
other wireless protocols at the same time. A carrier could support
different classes of devices in the same spectrum, Perlman said.
In a video demonstration, Perlman shows streaming 1080p video at 10
MHz on laptops over an LTE cellular connection, 4K streams of Netflix's
"House of Cards" running on 4K TVs and HD video running a half dozen
stacked iPhones with 5MHz bandwidth, all getting the full spectrum
bandwidth simultaneously. "It's absolutely a revolution in
wireless....there is nothing close to this density, even with the phone
antennae a few millimeters apart," Perlman said
Of course, pCell only exists in tests so far. Perlman will offer the
first public demonstration of the technology Wednesday at Columbia
University. "It's like cold fusion. It sounds too good to be true,"
Perlman told CNET. "We want attendees to ask us hard questions, and for
people to understand that this is for real and to figure out what to do
with this powerful thing."
"It's for real," said Rick Doherty of research director of the
Envisioneering Group. "It does deliver multiple streams of data better
than any cellular switching technology or 5G, which isn't real yet. He
has solved a puzzle of nature, reconstructing goodness out of what seems
to be randomness and interference."
Perlman and team have been meeting with the major carriers, Internet
service providers, and platform providers like Google and Apple and has
been performing tests. The low hanging fruit for pCells are large
metropolitan areas that are congested. "We have a meeting with carriers,
and the CEO is flying to see us the next week," he said. The company is
testing the technology with a partner in San Francisco and expects a
commercial deployment by the end of the year, with broader global
deployments in 2015.
This isn't his first role as a technical revolutionary. Perlman
worked at pioneering companies including Atari, Apple, and General Magic
before the turn of the century, and he created and sold WebTV, a system
that offered Internet access via TVs, to Microsoft for about $500
million in 1997. He subsequently developed a photorealistic motion
capture system used in "The Curious Case of Benjamin Button" and OnLive,
on-demand gaming platform that failed to win over paying players.
He said he has spent nearly a decade figure out how to move from
broadcast networking to unicasting, with users sharing spectrum but
receiving maximum throughput. "We came up with something that would work
mathematically but there was no radio. Everyone said we were crazy,"
Perlman said. "I finally found a principal scientist, and he agreed that
theoretically it could work, so we had to build a radio that never
existed before. Once we got it working, we had to develop new
mathematical techniques to make it practical." Part of being practical
was making the pCell compatible with LTE phones.
"The big news is yet to come," Perlman teased. For developing
countries without LTE, Artemis Networks' virtual would be a much cheaper
way to offer fiber-class broadband than conventional cellular
technology.
With Artemis Network's wireless technology a company with sufficient
capital, scale, and ambition could create a mobile network for devices
with unlicensed spectrum. "Setting aside the nerdy technical stuff, the
promise of what we are doing is a world that is interconnected with
reliable broadband everywhere," Perlman said.
With just 12 people, Perlman's company is looking for strategic
partners to turn pCell into more than just a compelling technology demo.
"It's always tricky to do that in the world of competing interests. We
made it so there is no way to block it. Mobile carriers can use it, and
for those who want to do nothing, someone will BlackBerry you."
