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SUMMARY
The GBAN project is engaged in a number of activates relating to DSL technology, ranging from the development of new methods for improving the stability and performance of already deployed digital subscriber line (DSL) systems, to the development and deployment of the next generation DSL technology “G.fast”.
DSL is still the leading technology for delivering broadband over fixed access networks with a worldwide market share of over 55% (equal to about 360 million subscribers as of Q1-2013). Many network providers and operators have replaced the copper wiring with fibre, and have introduced faster “vectored” DSL systems. New technologies such as “fibre to the distribution point” (FTTdp) are on the cusp of being implemented but some research problems remain to be solved, such as the design of more robust DSL signal processing algorithms, the characterisation of twisted-pair cables deployed in the last drop at frequencies up to 200 MHs, and the development of deployment strategies. Te GBAN project seeks to address these challenges and thereby to improve stability, performance, and coverage in DSL systems.
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SOLUTIONS
- Designing new methods for optimising vectored VDSL2 parameters in an actual network environment aiming at improving stability, performance, and coverage.
- Developing deployment strategies for “sero-touch” vectored VDSL2 systems.
- Studying the coexistence of vectored VDSL2 with legacy xDSL and unbundled lines.
- Characterising A1 Telekom, Austria’s twisted-pair cables deployed in the last instalment.
- Analysing the potential of G.fast systems in terms of reach and rate.
- Producing strategies to ensure the coexistence between G.fast and VDSL2.
- Developing novel multiuser signal processing schemes for G.fast systems aiming at rate maximisation, energy minimisation, and improved quality of experience.
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LINK: http://www.ftw.at/research-innovation/projects/gban
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