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Ikanos Secret Sauce: Vectoring Up to 192 Lines
Monday, 18 October 2010 12:58

Ikanos_chips_colorful.jogMike Gulett a year ago promised Ikanos' vectoring would have features that blow away the competition, but wouldn't let DSL Prime readers in on the secrets. His successor as CEO, John Quigley, now is announcing they will have a board that dramatically reduces noise across 192 lines and possibly more.

Competitors, Quigley believes, are limited to vectoring 48 lines. This should be a significant advantage if more than 48 lines are close in the binder, but until we have field data it's hard to determine how much better the performance will be. On field terminals with less than 48 lines - common in "fiber to the node" - Ikanos is not claiming an advantage over Broadcom and Lantiq. But there will be a performance advantage for carriers with 192 line nodes, especially crucial Ikanos customer AT&T.

Ikanos believes carriers will choose fiber/DSL over fiber home because of vectored speeds.

Customers within 400-700 metersshould be able to get 50 and even 100 meg downstream, 50-90% more than currently. Several large deployments, including British Telecom and Deutsche Telekom are part fiber home and part fiber/DSL (FTTN.) France Telecom really doesn't want to fiber France, preferring to buy Morocco. Even China Telecom, under pressure from the government for fiber to the home, is doing some fiber/DSL but not publicizing it. Any of these builds might increase the proportion of DSL if vectoring works well in the field.

In the U.S., the fiber build is already dead.

Verizon is "winding down FiOS" per John Hodulik of UBS. Neither AT&T nor any of the large regional carriers like Century intend any significant fiber to the home.I got a note from D.C. last week asking "How can we incent significantly more fiber?" and replied "You can't without much stronger government action than anyone is talking about." Outside of Verizon fill-in, it's unlikely anyone will bring fiber to even 2% of U.S. homes in the next five years.

Which is music to the ears of the DSL folk at Ikanos. Their GPON chips aren't ready for market.

Quigley believes that other chipmakers will find it difficult to match the coding and compression techniques that Ikanos is using, giving Ikanos a long lead. He intends to deliver an FPGA board for customer trials early in 2011.

ZTE Unveils World's First System-level VDSL2 Vectoring Prototype


Bandwidth Breakthrough with the Use of Copper Lines in Data Networks

21st October 2010, Shenzhen – ZTE Corporation (“ZTE”) (H share stock code: 0763.HK / A share stock code: 000063.SZ), a leading global provider of telecommunications equipment and network solutions, today announced the launch of the world's first system-level VDSL2 vectoring prototype - ZXDSL 9836. By leveraging system-level vectoring technology, the transmission and reception signals on every copper can be collectively processed in the central vectoring engine of the ZXDSL 9836, therefore eliminates crosstalks between copper pairs of the whole system, and improves the VDSL performance at the system level.

The ZXDSL 9836 automatically analyzes interference between line pairs and eliminates the major interference, achieving 100M data downstream speeds through copper lines. It is a significant breakthrough that paves the way for the commercial use of copper lines in large-scale network deployments.

Through the innovation of system-level vectoring technology, ZTE is able to increase the capacity of copper wires, extend the network's reach and prolong the life cycle of copper cables, making it possible for VDSL2 vectoring technology to progress from a laboratory concept to actual commercial application.

The introduction of the special vectoring card allows equipment to be smoothly upgraded and configured to support vectoring. ZTE's ZXDSL 9836 compact DSLAM can support up to 192 VDSL2 lines with centralized system-level vectoring. It provides vectoring for all access lines from the same remote access node in a number of application modes from small-capacity FTTB (Fiber-to-the-Building) projects to large-capacity FTTC (Fiber-to-the-cabinet) deployments, which cannot be achieved by current card-level vectoring solutions.

"Years of commercial use proves that DSL technology still has a long life cycle ahead," said Xu Ming, ZTE Vice President and Fixed-Line Product Line General Manager. "By drawing on the strength of a 3000-strong team in fixed-line broadband access R&D, ZTE is able to track technological advances and innovate in this field and rapidly bring new technologies to market to help generate more commercial value for our customers."Press Release

Ikanos Unveils NodeScale™ Vectoring to Deliver

Broadband at 100 Mbps and Beyond for One-Tenth the Cost of Fiber

Breakthrough Technology Dramatically Increases Broadband Speed and

Reliability in Real World Deployment Scenarios

Creates Competitive Advantage for Service Providers

FREMONT, Calif. and PARIS, October 25, 2010 — Ikanos Communications, Inc. (NASDAQ:

IKAN), a leading provider of advanced broadband semiconductor and software products for the

digital home, today introduced NodeScale™ Vectoring. This breakthrough DSL access

technology enables 100 megabit per second (Mbps) performance and beyond, speeds that were

previously unattainable in the vast majority of the world’s service provider networks. By deploying

Ikanos’ state-of the-art NodeScale Vectoring technology, service providers will be able to extend

very high-speed Internet access and new critical services – including multiple high-definition

television streams, distance learning, video conferencing, telemedicine, and more – without

having to incur the high costs of installing complete fiber-to-the-home networks.

“Ikanos’ NodeScale Vectoring technology will deliver the performance of fiber at one-tenth the

cost of fiber-to-the-home,” said John Quigley, CEO and president at Ikanos. “With NodeScale

Vectoring, we believe that service providers will save billions of dollars on broadband

deployments by delivering high-speed, highly reliable Internet access and premium services over

their existing copper infrastructure.”

Ikanos NodeScale Vectoring Enables Reliable Performance

One of the challenges in deploying very-high-speed Internet access over existing infrastructure is

the degradation that occurs as a result of crosstalk between coincident copper wire pairs. Each

wire can often and intermittently interfere with neighboring wires, thereby introducing noise,

limiting line quality and reducing VDSL performance. Other impediments including AM radio

signals, power lines, lightning and other atmospheric elements inject even more noise into the

copper network.

Ikanos’ NodeScale Vectoring technology analyzes the crosstalk and interference environment in

real time and creates a unique set of compensation signals that effectively eliminates both. In

fact, NodeScale Vectoring cancels noise across an entire network node from 192 to 384 ports or

more, meeting the deployment requirements of the world’s leading service providers. Handling

crosstalk at that level presents a massive computational challenge requiring Gigabits of memory.

With Ikanos’ unique and patent-pending algorithms, compression and coding techniques, service

providers can deliver 100 Mbps performance at the scale necessary to support their growing

subscriber bases via a cost-effective commercial silicon and software solution.

Innovative Standards-based Silicon and Software Solution

NodeScale Vectoring was designed from inception to address the need for delivering 100 Mbps

performance reliably across an entire service provider network. The complete system includes

NodeScale Vectoring compatible line cards, Vector Computation Engines and G.vector-ready

customer premises equipment. The system can be deployed flexibly to increase the performance

of existing VDSL nodes, as part of ADSL network upgrades and in copper plants that previously

served only plain old telephone service (POTS). Since the same Ikanos chipset supports

vectored and non-vectored deployments, upgrades can occur on a line-by-line basis for a pay-as-

you-go vectored network deployment.

Ikanos’ NodeScale Vectoring complies with the International Telecommunication Union standards

group (ITU-T) G.vector standard (G.993.5), which provides for dynamic spectrum management

level 3 (DSM-3) through the use of advanced crosstalk cancellation techniques.

Demonstrations and Conference Session at Broadband World Forum 2010

At Broadband World Forum, ZTE Corporation will demonstrate the first DSLAM employing Ikanos’

standards-based NodeScale Vectoring technology. It will be on display in ZTE’s booth, number

E1, during the exhibition, October 26-28, at the CNIT La Defense in Paris.

“Vectoring across the entire node is the only practical approach for realizing the true benefits that

G.vector can bring to a VDSL deployment. It is critical to have centralized control and visibility on

all possible sources of crosstalk that can degrade the performance in a cable or binder.

Approaches which cannot address all sources of crosstalk in a node, such as line card-level

vectoring, will prove to have minimal measurable benefits in real world deployments,” said (Franz)

Liu Feng, marketing director, Fixed Network Product Line at ZTE. “NodeScale Vectoring will have

a dramatic impact on service provider networks around the world, allowing carriers to deliver the

performance their customers demand without having to incur the costs of overhauling their entire


In addition, Ikanos will introduce its NodeScale Vectoring solution at Broadband World Forum in a

conference session entitled “Advancing the State of the Art – ITU-T G.vector Standard Surpasses

Fiber Performance Over Copper.” Ikanos, along with speakers from leading service providers

AT&T and Swisscom, and equipment manufacturers Alcatel-Lucent and ZTE, will participate in

the session scheduled for October 26.


Last Updated on Saturday, 10 September 2011 13:24