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Huawei Debuts Giga DSL Prototype Technology | Dec 16, 2011 | Fixed Access Infrastructure | Analyst: Erik Keith Event Summary December 14, 2011 -- Huawei has announced the industry's first Giga DSL (digital subscriber line) prototype. The Giga DSL system employs time division duplex (TDD) to achieve a total upstream and downstream rate of 1,000 Mbps over a single 100-meter twisted pair. By using low-power spectral density in-signal transmission, the Giga DSL prototype reduces radiation interference and power consumption and provides a total upstream/downstream rate of one Gbps within 100 meters and over 500 Mbps within 200 meters. | Read Press Release | Quick Take Analytical Summary • Current Perspective: Moderate on Huawei’s Giga DSL prototype debut, as it highlights the company’s progress in developing a technology that will enable operators to extend the lifespan of their copper networks, where it makes sense. In fact, the ability to deliver a symmetric 1 Gbps connection over a single copper pair essentially enables operators to offer “fiber speed” services over DSL, albeit over very short loops. For example, this technology is ideal for the massive (and global) multi-dwelling unit (MDU)/fiber-to-the-building (FTTB) market, where operators currently deploy fiber-fed DSLAMs with VDSL2 or Ethernet interfaces. However, since this technology is undoubtedly still a long way from general availability, the impact is limited. • Vendor Importance: High to Huawei, because despite its strong position in the global fixed access market (i.e., the number one position in both the DSL and FTTH sectors based on port shipments reported to multiple industry sources), the vendor still needs to push forward on the R&D front to stake its claim to leadership from a technology standpoint. With chief rivals Alcatel-Lucent and ZTE (as well as Ericsson) also asserting their positions at the forefront of fixed access technology, as evidenced by their own comparable DSL enhancement solutions, Huawei is compelled to respond accordingly, regardless of the real world readiness or applicability of the 1 Giga DSL proposition. • Market Impact: Moderate on the fixed access infrastructure market, because despite the seemingly high value of a solution that delivers symmetric 1 Gbps connections over a single copper pair at 100 meters (and 500 Mbps at 200 meters), the reality is that Huawei’s prototype 1 Giga DSL offering is not ready for primetime, mass-market deployments. At present, it is effectively little more than an experiment performed over “perfect” copper in an ideal, controlled laboratory environment. However, this technology (and comparable solutions being developed by rival vendors) will undoubtedly have value over the mid- to long-term, once it is viable for deployment in live operator networks. CLIENTS ONLY Current Analysis Perspective Competitive Strengths and Weaknesses Response & Recommendations Buyer Actions | Client access - Full report in Fixed Access Infrastructure | More information Share this Current Analysis Competitive Intelligence Highlight: Top Top

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Huawei Unveils Industry's First Giga DSL Prototype

Can Achieve Access Rate of One Gbps per Twisted Pair

[Shenzhen, China, December 14, 2011]: Huawei, a leading global information and communications technology (ICT) provider, today announced that it successfully launched the industry's first Giga DSL (Digital Subscriber line) prototype. The Giga DSL system employs time division duplex (TDD) to achieve a total upstream and downstream rate of 1,000 Mb/s over a single twisted pair.

In order to address obstacles related to limited bandwidth of FTTB (Fiber to the Building)/FTTC(Fiber to the Curb) and difficulty in deploying FTTH (Fiber to the Home) drop cables – so that users can enjoy bandwidth-hungry services such as IPTV and HDTV – optical fiber access points need to be located closer to users. While, 100 Mbp/s-plus ultra-broadband access can be made available relatively quickly by utilizing legacy copper line resources, providing 1,000 Mbp/s bandwidth within 100 meters of twisted pairs using DSL technology is more complex.

By using low-power spectral density in-signal transmission, Huawei's Giga DSL prototype reduces radiation interference and power consumption, and provides a total upstream and downstream rate of one Gb/s within 100 meters, and 500 Mb/s-plus within 200 meters - making it a cost-effective option for telecom operators building ultra-broadband access networks.

Giga DSL is a next-generation access technology solution that growing quickly. In 2011, ITU-T set up a G.fast project team dedicated to formulating new standards for ultra-speed access at short distances, the aim being to achieve 500 Mb/s access rate per twisted pair within 100 meters. Huawei has actively participated in the work of the team and has become a major technical contributor, having recently worked to incorporate TDD-OFDM (Orthogonal Frequency Division Multiplexing) as a G.fast modulation mode.

Dr. Long Guozhu, Huawei's Principal Expert of DSL technology, said, "Huawei has taken the lead in developing a Giga DSL prototype because of our rich capabilities and industry-leading technical strengths in access networks. It was inevitable that spectrum expansion would help us improve the rate of a twisted pair at a short distance, but after the spectrum is expanded, a technical issue appears: how to design the high-speed physical layer and high-frequency analog front end (AFE). To tackle this issue, Huawei's FBB Innovation Lab used the core solution TDD-OFDM, which simplifies the physical-layer architecture and the AFE design, while at the same time makes it possible to be downward compatible with traditional ADSL/VDSL2 technologies."

Huawei also recently announced the successful development of the world's first node level vectoring (NLV) prototype. Huawei's vectoring product provides 100 Mbps access over a single twisted pair in FTTC/FTTB, and has been tested and commercially trialed with many leading telecom operators. This, along with the company's latest prototype, Giga DSL, signifies that DSL technology still has great potential to meet the requirements of broadband users for ultra-high-speed access in the future.

Huawei's advances within Giga DSL will enhance the capabilities of the company's SingleFAN broadband access solution. Its SingleFAN solution and related offerings are now servicing over one third of the world's broadband users with ultra-broadband access services.