Ikanos NodeScale Vectoring improves DSL performance - Lightwave

Ikanos NodeScale Vectoring improves DSL performance

OCTOBER 25, 2010 -- Ikanos Communications Inc. (NASDAQ: IKAN) has unveiled NodeScale Vectoring. By countering the effects of such impairments as cross talk, NodeScale Vectoring can enable 100-Mbps performance via DSL, Ikanos asserts.

One of the challenges in deploying very high-speed Internet access over copper 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 is designed to analyze the crosstalk and interference environment in real time and create a unique set of compensation signals that effectively eliminates both. Ikanos says that NodeScale Vectoring cancels noise across an entire network node from 192 to 384 ports or more using a combination of patent-pending algorithms and compression and coding techniques.

The complete system includes NodeScale Vectoring compatible line cards, Vector Computation Engines, and G.vector-ready customer premises equipment. The system can be deployed 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), Ikanos says. As the same Ikanos chipset supports vectored and non-vectored deployments, upgrades can occur on a line-by-line basis.

"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 network."

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