Turun AMK Trial Avausseminaari 7.6.2011 Jarkko PaavolaPresentation Transcript
Trial opening seminar 07.06.2011 / Jarkko PaavolaWhite space test environment forbroadcast frequencies (WISE)Efficient use of TV-band spectrum resources through cognitiveradio technologies and geolocation databases www.turkuamk.fi
WISE focusTV frequencies (470-790 MHz) and Geo-location database• Work in CEPT SE43 and other relevant organisations• Geo-location database primary method for the first CR applications – Fairspectrum cognitive radio and TV White Space database development projectTurku testnetwork• In operation for 10 years – DVB-T, DVB-H, DVB-T2, CMMB• Testbed for providing input to Ficora for regulation• Can be offered to all Trial partners – Test locations, routes – Collection of data for post processing – Modification of transmitted signal • E.g ”black space” research www.turkuamk.fi
WISE objectives• How to provide enablers for commercial operation of Cognitive radios (CR) in TV White space (WS)?• Key issue: TRUST• Obstacles in deployment of WS CR – Regulatory bodies uncertain how to protect primary systems (TV, radio microphones) – Also, many operators opposing • CR seen as additional interference • Maybe fear for losing profit with changed value networks?• How to build trust? Geo-location database should – provide sufficient accuracy on location, power levels • ”Sufficient” is a research topic – guarantee information security www.turkuamk.fi
WISE position in Trial program www.turkuamk.fi
WISE Consortium• Turku University of Applied Sciences (TUAS) – Electronics/Radio Lab – Business Information Technology• University of Turku (UTU) – Business and Innovation Development (BID)• Aalto University – Communications and Networking (COMNET) – Signal processing and Acoustics (SPA)• Digita• Fairspectrum• Nokia• Ficora• … and EB is supporting the project with Receiver equipment www.turkuamk.fi
WISE – work flow Tähän kuva tai kaavio www.turkuamk.fi
WP1 - Algorithms for Open CRdatabase• Lead: Aalto University• Channel modeling – Develop propagation modeling for WSD based on the field measurements – Study the impact of the number of measurements to the modeling accuracy with ray tracing tool• Database calculations – Develop algorithms for the calculation/approximation of CEPT SE43 method – Fast algorithms applying computational geometry www.turkuamk.fi
WP1 - Algorithms for Open CR database Algorithms for open CR database QoS estimator for TV WS data TV WS Admission TV WS Congestion local signals repository control control Tasks: Tasks: Tasks: Tasks: 1) Estimates TV 1) Storage and 1) Calculates 1) Return network signal strengths update of spatio – geographical into desired/target (continuous duty) temporal signal distribution of air state in case of 2) Predicts signal QoS information interface loading overloading. strength from (continuous duty) for proposed WSD (continuous duty) pWSD transmitters 2) Storage and combinations (on Note: Overloading in given locations update of load and demand duty). should be an (on demand duty) admission control 2) Grant admission exceptional thresholds. for new WSDs to situation. (continuous duty) start the operations (on demand duty). Benchmarking with WP2 measurements Tasks: Calibration of radio propagation and RF behavioral models
WP2 – Measurements andsimulation• Measurements (Lead: TUAS) – Provide measurement facilities and access to the test network in the Turku area – Perform laboratory and field measurements in scenarios relevant to CR regulation (e.g. CEPT SE43), for example: • Laboratory measurements of adjacent channel RF interference • Field measurements of interference levels for local reference geometries considered in SE43 (first campaign performed) • Interference studies for wireless microphones • Propagation measurements and model synthesis for simulations www.turkuamk.fi
WP2 – Measurements and simulation Layout of the DVB test network in Turku. Transmitters 1 and 2 compose a single frequency network on channel 38 (610 MHz), while transmitter 3 operates on channel 48 (690 MHz).
White Space Device (WSD) Maximum Power Measurements• Measurements in Turku, week 21• Receive DTV with roof top antenna (10m) at noise limited +3 dB case and some higher power levels like +13 dB, +23 dB.• Interfering WSD at 22m away• Increase the WSD power until picture failure for co-channel and adjacent channel at N-1, N-2, N-3 and N-4.• Compare true WSD interference power levels to calculated power levels. Measurement van with DVB-T test transmission at antenna at 10m. 610 MHz from Pääskyvuori transmitter. Interfering WSD Tx.
WP2 – Measurements andsimulation• Simulation (Lead: UTU) – Construct a large-scale simulation testbed to complement measurement-based studies – As a case study, a detailed model of the Turku test network is implemented – The simulation framework is designed to be modular and customizable to allow a wide range of studies, for example: • Network-level CR algorithm development and testing • Large-scale system simulations, e.g. Monte Carlo capacity analysis based on CEPT SE43 guidelines • Geolocation database studies www.turkuamk.fi
WP2 – Measurements and simulation Increase in allowed secondary transmission power as a function of terminal location and frequency separation from primary transmitter. Calculated according to CEPT SE43 guidelines.
WP3 – Value chains and ecosystems• Lead: Digita• Defining the most relevant White-Space scenarios for the further studies• Developing White Space estimation methods based on WP1/WP2 results• Estimating the amount of white-Space for defined scenarios• Developing White Space value network models for the defined scenarios• Developing the business case evaluation models for the developed value networks• Evaluating various operators business cases and detecting the most critical factors.• Developing / finding / using existing quantitative models for estimating the monetary value of the white spaces in various scenarios www.turkuamk.fi
WP3 – Value chains and ecosystems• Database security – Service reliability – Confidentiality – Mutual authentication (user/device/database) – Information integrity• Work is based on Fairspectrum cognitive radio and TV White Space database development project – Threat analysis, risk management – Authentication alternatives – Network security issues – Also, radio microphone licensing via Fairspectrum database? www.turkuamk.fi
Regulation/Standardization• CEPT S43 – First contribution to next SE43 meeting in July• IETF PAWS• Also followed – ETSI RRS – IEEE 802.11af, IEEE 802.22• WISE objectives will be adjusted according to input from Ficora www.turkuamk.fi
IETF Protocol to Access WhiteSpace database (PAWS)• ”It is expected that white space databases will be reachable via the Internet, and that radio devices too will have some form of Internet connectivity, directly or indirectly.”• The overall goals of PAWS are to – Standardize a mechanism for discovering a white space database. – Standardize a method for accessing a white space database. – Standardize wire formats to be carried over the database access method (i.e., formats for queries and responses). – Ensure that the discovery mechanism, database access method, and wire formats have appropriate security levels in place.• Specification expected April 2012 www.turkuamk.fi
Possibilities for collaboration• Collaboration already planned – EECRT – CORE – EBTrial• Turku test network available for Trial partners• Business cases/Value networks investigated in many projects• Common efforts in regulation and standardization• WISE partners welcome cooperation in all presented work topics! www.turkuamk.fi
Contact: Jarkko Paavola (email@example.com)THANK YOU! www.turkuamk.fi