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- Some initial results and observations from a series of trials within the Ofcom TV white spaces pilotPublication . Holland, Oliver; Ping, Shuyu; Sastry, Nishanth; Chawdhry, Pravir; Chareau, Jean-Marc; Bishop, James; Xing, Hong; Taskafa, Suleyman; Aijaz, Adnan; Bavaro, Michele; Viaud, Philippe; Pinato, Tiziano; Anguili, Emanuele; Akhavan, Mohammad Reza; McCann, Julie; Gao, Yue; Qin, Zhijin; Zhang, Qianyun; Knopp, Raymond; Kaltenberger, Florian; Nussbaum, Dominique; Dionísio, Rogério Pais; Ribeiro, José Carlos; Marques, Paulo; Hallio, Juhani; Jakobsson, Mikko; Auranen, Jani; Ekman, Reijo; Kokkinen, Heikki; Paavola, Jarkko; Kivinen, Arto; Solc, Tomaz; Mohorcic, Mihael; Tran, Ha-Nguyen; Ishizu, Kentaro; Matsumura, Takeshi; Ibuka, Kazuo; Harada, Hiroshi; Mizutani, KeiichiTV White Spaces (TVWS) technology allows wireless devices to opportunistically use locally-available TV channels enabled by a geolocation database. The UK regulator Ofcom has initiated a pilot of TVWS technology in the UK. This paper concerns a large-scale series of trials under that pilot. The purposes are to test aspects of white space technology, including the white space device and geolocation database interactions, the validity of the channel availability/powers calculations by the database and associated interference effects on primary services, and the performances of the white space devices, among others. An additional key purpose is to perform research investigations such as on aggregation of TVWS resources with conventional resources and also aggregation solely within TVWS, secondary coexistence issues and means to mitigate such issues, and primary coexistence issues under challenging deployment geometries, among others. This paper provides an update on the trials, giving an overview of their objectives and characteristics, some aspects that have been covered, and some early results and observations.
- Combination of a geolocation database access with infrastructure sensing in TV bandsPublication . Dionísio, Rogério; Ribeiro, Jorge Miguel Afonso; Marques, Paulo; Rodriguez, JonathanThis paper describes the implementation and the technical specifications of a geolocation database assisted by a spectrum-monitoring outdoor network. The geolocation database is populated according to Electronic Communications Committee (ECC) report 186 methodology. The application programming interface (API) between the sensor network and the geolocation database implements an effective and secure connection to successfully gather sensing data and sends it to the geolocation database for post-processing. On the other hand, the testbed allows authorized TV white space devices to gain access to the services of the geolocation database, according to a draft implementation of Internet Engineering Task Force (IETF) Protocol to Access White Space (PAWS) Two experimental methodologies are available with the testbed: one focused on coexistence studies with commercial wireless microphones, when the testbed is used for sensing only, and another for demonstration purposes, when the testbed is also used to emulate wireless microphone signals. Overall, this hybrid approach is a promising solution for the effective use of TV white spaces and for the coexistence with digital TV broadcast signals, or dynamic incumbent systems, such as unregistered wireless microphones.
- A series of trials in the UK as part of the Ofcom TV white spaces pilotPublication . Holland, Oliver; Sastry, Nishanth; Ping, Shuyu; Knopp, Raymond; Kaltenberger, Florian; Nussbaum, Dominique; Hallio, Juhani; Jakobsson, Mikko; Auranen, Jani; Ekman, Reijo; Paavola, Jarkko; Kivinen, Arto; Tran, Ha-Nguyen; Ishizu, Kentaro; Harada, Hiroshi; Chawdhry, Pravir; Chareau, Jean-Marc; Bishop, James; Bavaro, Michele; Anguili, Emanuele; Gao, Yue; Dionísio, Rogério Pais; Marques, Paulo; Kokkinen, Heikki; Luukkonen, OlliTV White Spaces technology is a means of allowing wireless devices to opportunistically use locally-available TV channels (TV White Spaces), enabled by a geolocation database. The geolocation database informs the device of which channels can be used at a given location, and in the UK/EU case, which transmission powers (EIRPs) can be used on each channel based on the technical characteristics of the device, given an assumed interference limit and protection margin at the edge of the primary service coverage area(s). The UK regulator, Ofcom, has initiated a large-scale Pilot of TV White Spaces technology and devices. The ICT-ACROPOLIS Network of Excellence, teaming up with the ICT-SOLDER project and others, is running an extensive series of trials under this effort. The purpose of these trials is to test a number of aspects of white space technology, including the white space device and geolocation database interactions, the validity of the channel availability/powers calculations by the database and associated interference effects on primary services, and the performances of the white spaces devices, among others. An additional key purpose is to undertake a number of research investigations such as into aggregation of TV White Space resources with conventional (licensed/unlicensed) resources, secondary coexistence issues and means to mitigate such issues, and primary coexistence issues under challenging deployment geometries, among others. This paper describes our trials, their intentions and characteristics, objectives, and some early observations.