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27.3.2017 : 12:34

Dynamic Spectrum Sharing Seminar

Paula Boyd (Microsoft) welcomes everyone to the QoSMOS Dynamic Spectrum Sharing Seminar

The QoSMOS Dynamic Spectrum Sharing Seminar, held at the Microsoft Innovation and Policy Center, Washington DC on 22nd March 2013 allowed for the sharing of the latest developments in spectrum sharing from both US and European perspectives. This event followed on from the success of the QoSMOS Final Industry Briefing in London on 12th December 2012.

Andrew Stirling (Centre for White Space Communications) and Michael Fitch (BT) welcome everyone

Paula Boyd introduced the event on behalf of Microsoft, welcoming everyone and affirming Microsoft’s interest in spectrum sharing as an important option for broadband connectivity.

Andrew Stirling (Chair of Centre for White Space Communications) also provided a welcome and acted as chair for the event.

The slides for the following presentations can be found undefinedhere.



Regulatory Perspectives in the U.S. and Europe

Tom Power (White House Office of Science and Technology) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Tom Power gave the keynote speech: "The role of spectrum sharing in America’s wireless future" [Summary of Tom's presentation provided by Michael Fitch]

Tom Power is with the White House Office of Science and Technology Policy, previously he was with the FCC. Tom thanked the QoSMOS project and Microsoft for organising the event. He spoke of the outcome of the PCAST report in July 2012, (President’s Council of Advisors on Science and Technology), entitled Freeing up of Spectrum for Wireless Broadband. This reported upon progress made by the NTIA (National Telecommunications and Information Administration) on a previous Presidential Memorandum that directed them to find 500MHz of spectrum. Note that the NTIA administers Federal spectrum usage whereas the FCC is responsible for commercial spectrum usage. In late 2010 the NTIA identified 115MHz that could be shared with commercial users within 10 years (1695 – 1710 MHz and 3550 – 3650 MHz). In April 2012 following further analysis in consultation with the PPSG (Policy and Plans Steering Group), the NTIA identified an additional 95 MHz (1755 – 1850 MHz) that can be made available in stages, on a shared basis, starting in five years. NTIA also commenced review of an additional 195 MHz of spectrum in the 5 GHz range.

Tom went on to say that wireless is everywhere, driving innovation, and sharing would need to be part of the approach – especially when clearing spectrum can take time and be expensive. For example, to clear the 95MHz slot mentioned earlier would cost $18m and take 10 years, then there is the problem of where to move the existing users to. PCAST even recommended that sharing should be the default approach but there are times when it doesn’t make sense. The approach would be a database manager, where government users would have primary rights, but both the database and the commercialisation of it are complex issues. On the positive side, federal users are already used to sharing. An example of the complexity is when sharing with naval radar, when ships pass along the coast – we need a reliable way of knowing when the ship is present, and this may not be published due to security concerns.

In summary, he said that the Governments job is to create opportunities and knock down barriers to innovation, it is the job of people such as those in the meeting and in wider industry to do the business analysis and the technology development. He looks forward to spending the day learning.


Michael Calabrese (Open Technology Institute, New America Foundation) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Michael Calabrese is a Senior Research Fellow with New America's Open Technology Institute focusing on developing and advocating policies to promote pervasive connectivity, including spectrum policy reform, wireless broadband deployment and IT investment and innovation. He spoke about the relationship between licensed, unlicensed and shared spectrum, asserting that the immediate future of shared spectrum is likely to be in smartgrid type applications, mobile payments, M2M and healthcare. He gave a summary of the PCAST recommendations that include a Presidential Memorandum to identify 1000MHz for sharing with the private sector. He sees 3.5GHz, 4.9GHz and extending the 5GHz bands as being the most likely candidates in the US.

Julius Knapp (FCC Office of Engineering and Technology) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Julius Knapp is the chief of the FCC Office of Engineering Technology (OET). OET is the Commission’s primary resource for engineering expertise and provides technical support to the Chairman, Commissioners and FCC Bureaus and Offices. Spectrum sharing is one of the tools to improve spectrum management. White space is a new paradigm and the experience with TVWS can be built upon to utilise sharing in the 3.5 and 4.9GHz bands being proposed by PCAST. There is an expansion of the experimental licensing program with research, healthcare and compliance components, which will allow a greater variety of wireless equipment to enter trials. In conclusion, he says we must build upon the white space model and encourage more involvement from the community.

Andrew Gowans (Ofcom UK) presents remotely at the QoSMOS Dynamic Spectrum Sharing Seminar

Andrew Gowans is with Ofcom UK. He spoke about TVWS being a test case to tease out regulatory, legal and technical issues and provide a framework for sharing in other bands. Sharing is beneficial using licensed or unlicensed equipment depending upon the band and context. The UK regulations for tradable licences and spectrum leasing can be a foundation for dynamic sharing. Finally, he said that database managers would be the short term technology, which could be augmented later with the addition of sensing and context awareness.

QoSMOS technical presentations

Michael Fitch (BT) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Michael Fitch, QoSMOS project Manager and a chief researcher as BT, gave an introduction to the QoSMOS project and an overview of some of its key outcomes. Michael highlighted the achievements of QoSMOS' substantial external advisory board (EAB) which has representation from across the industry including regulators, broadcastors and vendors. He also highlighted the key QoSMOS concept, which consists of a two-part cognitive manager: A spectrum manager that discovers spectrum opportunities over longer timescales and a resource manager that assigns the spectrum opportunities to individual links on a shorter timescale. Other highlights included the results from a spectrum trading investigation and a brief introduction to the key areas that would be covered by the subsequent QoSMOS presentations.

Richard MacKenzie (BT) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Richard MacKenzie, a researcher at BT, spoke about the use cases and business models used in the QoSMOS project. First he explained the the process used to select the use cases that QoSMOS would focus on. He then gave details on the business case analyses for four particular implementations of these use cases, using TV white space (TVWS) spectrum: Using TVWS for capacity extension of an LTE network, Rural broadband, Cognitive femtocells to provide a mobile service, and providing the infrastructure for a machine-to-machine (M2M) network. For each of these analyses Richard highlighted the key parameters which can affect the potential success of each implementation. For the case of using TVWS for capcity extension of an LTE network the key parameter is the cost that an operator would have to pay to buy alternative spectrum, for the other three implementations the key parameters are the number of subscribers and the average revenue that a subscriber is likely to pay.

Klaus Moessner (University of Surrey) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Professor Klaus Moessner, of the University of Surrey, gave a presentation on the mobility and QoS suport for cognitive radio. He gave details of how the QoSMOS system architecture has been designed to provide both mobility and QoS in a range of deployment scenarios. Klaus provided further details on the two-part cognitive manager design including results from investigations into the functionality of a spectrum manager. These investigations included opportunity modelling and the demonstration spectrum manager with a TVWS database.

Dominique Noguet (CEA-LETI) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Dominique Noguet, QoSMOS technical manager and Head of Wireless and Security Technology Dpt at CEA-LETI, gave a presentation on the physical layer radio technologies developed in the QoSMOS project, with a focus on filter bank multiple carrier (FBMC). Dominique explained how this new modultion method, which is also under discussion in IEEE DYSPAN 1900.7, allows for improved adjacent channel leakage ratios, frequency flexibility and also for pooling of spectrum which might be fragmented. He explained how this compares to OFDM and uses results from the TVWS demonstration to show how FBMC is much better suited to efficient usage of TVWS than OFDM.


The following demonstrations were presented on the day. The first four representing QoSMOS, the final three representing US/Canadian vendors:

- Filter Bank Muliple Carrier (FBMC) modulation - CEA-LETI (France)

- QoSMOS Spectrum manager - Fraunhofer (Germany)

- Adaptation layer - TST Systems (Spain)

- Sensing and radio environment radio emulation - Agilent (Belgium) and IT (Portugal)

- TVWS equipment and Telcordia database - Adaptrum (US)

- Enhanced WiFi in TVWS - Interdigital (Canada)

- FCC certificed spectrum manager database including PCAST SAS - SpectrumBridge (US)

Presentations from Vendors

Ranveer Chandra (Microsoft) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Ranveer Chandra is with Microsoft Research, focussing upon wireless technology and energy efficiency. He described the Microsoft KNOWS project which has a number of components including WhiteFi and ad-hoc networking in TV Whitespaces. It includes a trial of a campus WhiteFi network and construction of a geo-location service. Trials of ‘white space finders’ have been run in Singapore and Kenya. Ongoing research is in improving co-existence with existing users of the spectrum and also between white space devices.

Angelo Cuffaro (Interdigital) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Angelo Cuffaro is with Interdigital. He presented the approach they have taken, which is WiFi over TV Whitespace. Spectrum sharing will be the norm, either opportunistic access, shared licensed access or the PCAST model which is a hybrid. He gave use-case examples of access and backhaul. Their architecture includes an option for LTE protocol to be used behind TVWS radio units.

Darrin Mylet (Adaptrum) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Darrin Mylet, who is with Adaptum, spoke about Adaptrum's involvement in TVWS developments, including certification, trials and the development of their existing and upcoming products. Darrin described how greater spectral efficiency is required to meet the higher demand and lower cost per bit for wireless data services. This means greater spectral reuse along with exploiting TVWS. He also described the many potential markets of TVWS and the the performance that we can expect.

Peter Stanforth (SpectrumBridge) presents at the QoSMOS Dynamic Spectrum Sharing Seminar

Peter Stanforth is with SpectrumBridge. He presents on the architecture of the spectrum manager solution and on the lessons learnt. Some of these are that the diversity of WS devices is very wide, that once wireless terminals are embedded they are there to stay and aggregate interference and co-existence can become increasingly challenging. The white space is really grey and there is a need for better planning and co-existence tools. His advice is to start simple – and don’t waste too much time working through complex regulatory rules. 

Panel Session

Panel members: Peter Stanforth (SpectrumBridge), Darrin Mylet (Adaptrum), Andrew Stirling (Centre for White Space Communications), Michael Calabrese (New America Foundation), Bernd Bochow (Fraunhofer), Ranveer Chandra (Microsoft).

The final session of the day was a panel session, "Bringing spectrum sharing to market’". The session moderator was Michael Fitch (BT). The panel members were Peter Stanforth (SpectrumBridge), Darrin Mylet (Adaptrum), Andrew Stirling (Centre for White Space Communications), Michael Calabrese (New America Foundation), Bernd Bochow (Fraunhofer) and Ranveer Chandra (Microsoft). The main message from this discussion was that there are many clear benefits of using TVWS and many applications could succeed, but we need to be able to focus on actual deployments if we are to see which applications are going to benefit the most.