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ProjectOASE - Optical Access Seamless Evolution

Competence Areas at RISE ICT
OASE - Optical Access Seamless Evolution

OASE - Optical Access Seamless Evolution. The OASE Integrated Project will examine Fibre-to-the-Home (FTTH) within a multi-disciplinary study to provide a self-consistent and coherent set of technological and business solutions. . The OASE project federates partners from all over Europe and is composed of major operators, industrial leaders in FTTH technologies, and European universities.

Acreo contributes with its broad competence in open access networks, techno-economics analysis, and end-to-end network control and management.


  • Study current and future requirements for NG-OA networks from economic, business, operational and regulatory Europe-centric perspectives,
  • Identify possible network architectures, and employ a set of energy-efficiency metrics and models to analyse their suitability, as well as assess the most appropriate migration strategies,
  • Identify network technologies that may be employed by using relevant cost and technical factors,
  • Examine the interactions between businesses in an “open network” marketplace by studying how increased convergence may offer new value chains and business opportunities,
  • Validate the findings of the comparative merits for the identified network architectures and technologies in a controlled environment via experimental testing.

Project results

Project results are found at the project site. An "Integrated OASE results overview” can be found here.

Summary of OASE results

Based on the technical, architectural and techno-economic studies, as well as the assessment under business related aspects, the project came to some technical, business and policy recommendations. From a pure technology perspective, a technology roadmap was established. This roadmap is based on potential time to market and availability of key components such as tuneable lasers, reflective transmitters, wavelength selective receivers, tuneable filters and coherent receivers, burst mode receivers, analogue-to-digital converters (ADC), digital-to-analogue converters (DAC), dispersion compensation and passive wavelength selective devices, and reach extension technologies as well as switching technologies. The market availability strongly depends on demand.

For sustained bit rates up to 500 Mb/s, the NGOA concepts based on dedicated-wavelength customer access (such as UDWDM, WR- or WS-WDM) are outperformed by the shared-wavelength approaches - such as GPON, XGPON or Active Optical Network with layer-2 remote node (i.e. AON Active Star) - with WDM backhaul allowing for higher aggregation. For GPON and XGPON the sharing takes place in the access infrastructure itself due to the TDMA mechanism; in AON Active Star the sharing takes place in the switch located in the field. Therefore, in the context of the residential mass market, WDM from an economical point of view makes only sense as an additional overlay layer such as in the Hybrid WDM/TDM-PON concepts, or WDM-backhaul concepts where WDM is purely used for increasing the scalability but not for addressing the residential customer.

This conclusion is in good agreement with the focus of FSAN on WDM/TDM-PON concepts, specifically TWDM. In general it has been shown that node consolidation enables cost savings that mainly occur in the aggregation network due to better equipment utilisation.
From the investigated business concepts, on the other hand, increased operational complexity and additional requirements for coordination are unfavourable. Especially, from an open access perspective, WDM approaches with unbundling on wavelength level are more difficult in terms of business implementation, with respect to open access at the fibre level or bit stream access.

Based on our findings concerning the economic viability for the different actors involved in an NGOA deployment, we have formulated some recommendations for policy makers.

  • From an open access point of view the preferred way of opening up a fibre-based access network remains either open fibre access, or bit-stream open access used today. WDM as an open access technology (e.g. a single wavelength per customer and service provider) results in significant additional system cost.
  • While the business case for the physical infrastructure provider (PIP) remains challenging per-se, significant indirect or cross-sectoral effects should be expected from a fibre deployment. This can be an additional stimulus for national and local governments and public support (in the form of state-aid or other) may be desirable.
  • It is desirable for passive infrastructure to be shared on an equal and non-discriminatory basis, in which case the deployed infrastructure should be technology agnostic, in order to maximise the potential wholesale customer base for a PIP: some network providers (NP) may run a PON, some an AON, some hybrids thereof. On the other hand, consequent higher costs have to be recouped as well, and all involved parties need to share these in a fair manner.
  • Public financial support should be focused on the PIP layer (mainly CAPEX driven), in which case support may be granted in terms of long-term loans, or over long depreciation periods, in order to increase the investment horizon.
  • For the NP, in-house deployment and CPE are significant cost factors. Business models that allow the allocation of these costs to house- or home-owners should receive greater attention. However, public financial support to the NP is unadvisable in the long term.

Project details

Duration: January, 2010 – February, 2013
Total Cost: €7,66 m
EC Contribution: €4,98 m
Project coordinator: Jean-Charles POINT JCP-CONSULT SAS
Partners: Acreo, Adva AG optical Networkning, Ericsson AB, Ericsson Telecomunicazioni, Deutsche Telekom AG, IBBT, JCP-consults SAS, KTH, Magyar Telekom RT, Slovak Telekom AS, Technische Universitaet Muenchen, Universitty of Essex.
Project website: http://www.ict-oase.eu/
Contact at Acreo: Marco Forzati, email: marco.forzati [at] acreo.se

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