Work-in-progress Procedings of the International Conference on Indoor Positioning and Indoor Navigation, IPIN 2021 Editors: Antoni Perez-Navarro Raúl Montoliu Joaquín Torres-Sospedra http://ipin-conference.org/2021/ Lloret de Mar, 28th November-2nd December, 2021 © 2021 for the individual papers by the papers’ authors. Copying permitted for pri- vate and academic purposes. This volume is published and copyrighted by its editors. http://ipin-conference.org/2021/ Editor’s Addresses Antoni Perez-Navarro (aperezn@uoc.edu) • IN3- Internet Interdisciplinary Institute (https://www.uoc.edu/portal/en/in3/index.html) Universitat Oberta de Catalunya (https://www.uoc.edu), Parc Mediterrani de la Tecnología (Edifici B3). Avda. Carl Friedrich Gauss, 5, 08860 Castelldefels (Barcelona), Spain • Faculty of Computer Sciences, Multimedia and Telecommunication (https://www.uoc.edu/portal/en/estudis_arees/informatica_multimedia_ telecomunicacio/index.html, Rambla del Poblenou, 156, 08018, Barcelona, Spain Raúl Montoliu (montoliu@uji.es) • Institute of new imaging technologies (http://www.init.uji.es/) Jaume I University. AV sos baynat s/n 12071 Castellón Joaquín Torres-Sospedra (jtorres@uji.es) • UBIK Geospatial Solutions S.L. (http://www.ubikgs.com) Av Vicente Sos Baynat S/N, 12006 Castellón, Spain • ALGORITMI Research Center (https://algoritmi.uminho.pt) Universidade do Minho, 4800-058 Guimarães, Portugal IPIN2021 Work-in-Progress Preface This volume contains the Work-in-Progress papers presented at IPIN 2021, the Eleventh International Conference on Indoor Positioning and Indoor Navigation (http://ipin-conference.org/2021/) held in Lloret de Mar, Spain, between Novem- ber 29th and December 2nd, 2019. Launched in 2010 in Zurich, Switzerland, IPIN is a unique event entirely dedicated to indoor localisation, its applications and its development. Locating devices in indoor environments has become a keyissue for many emerging location-based applications (LBA) in different fields. However, nowadays there is no overall and easy solution. Despite a large-scale deployment of such location systems is not available yet, this strategic topic is called to lead technological innovations of great impact on the daily activities of people in the coming years, in areas such as health and independent living, leisure, security, etc. Since the first edition,the Indoor Positioning and Indoor Navigation (IPIN) has been an excellent forum to bring together researchers, developers andservice providers in positioning and indoor navigation. Each year, IPIN solicits submission of high quality technical papers reporting orig- inal work not previously published, nor currently submitted for consideration else- where. In IPIN 2021 papers are submitted as one of two types: • Regular papers (RP), limited to 8 IEEE format pages, and for a 20 minutes oral presentation. • Work-in-Progress (WiP) papers, from 5 to 16 in single-column CEUR-WS format and for a 5 minutes oral presentation. Both, RP and WiP, could be presented Face-to-face or online, due to the covid-19 pandemic situation. RP proceedings have been submitted to IEEExplore and can be found at the fol- lowing link: https://ieeexplore.ieee.org/xpl/conhome/9662499/proceeding This volume collects the WiP papers. Each paper was reviewed by at least two members of the Program Committee of the Conference and, on the basis of their recommendations, 41 documents have been selected for publication and presentation as WiP at IPIN 2021, 20 of them online. We thank all members of the IPIN 2021 Program Committee for their effort in the review process that was fundamental for maintaining the high scientific level of the conference and all the researchers of the IPIN community who supported this event by submitting their work and actively participating in it. January 2022 Antoni Perez-Navarro, Raúl Montoliu, Joaquín Torres-Sospedra Committees 2 IPIN2021 Work-in-Progress Conference chairs • Antoni Pérez-Navarro, Universitat Oberta de Catalunya (ES) • Francesco Potortì, ISTI-CNR (IT) Local Conference Organisers • Antoni Pérez-Navarro, Universitat Oberta de Catalunya (ES) • Raúl Montoliu, Universitat Jaume I (ES) • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L. (ES) Competition Chairs • Francesco Potortì, ISTI-CNR (IT) • Sangjoon Park, ETRI (KR) • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L. (ES) TPC Chairs • Raúl Montoliu, Universitat Jaume I (ES) • Paolo Barsocchi, CNR (IT) • Antoni Pérez-Navarro, Universitat Oberta de Catalunya (ES) • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L. (ES) Publication Chairs • Laura Calvet, Universitat Oberta de Catalunya (ES) • Antonino Crivello, ISTI-CNR (IT) • Raúl Montoliu, Universitat Jaume I (ES) 3 IPIN2021 Work-in-Progress Publicity Chairs • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L. (ES) • Filippo Palumbo, CNR (IT) IPIN Steering Committee • Philippe Canalda, Université de Franche-Comté (FR) • Binghao Li, University of New South Wales (AU) • Rainer Mautz, Swiss Federal Railways (CH) • Hideo Makino, Niigata University (JP) • Adriano Moreira, University of Minho (PT) • Kyle O’Keefe, University of Calgary (CA) • Francesco Potortì, ISTI-CNR (IT) • Valérie Renaudin, Univ. Gustave Eiffel (FR) • Masanori Sugimoto, Hokkaido University (JP) • Jesús Ureña, University of Alcalá (ES) IPIN ISC • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L. (ES) TPC Members • Ferran Adelantado, Universitat Oberta de Catalunya (UOC), Spain • Teodoro Aguilera Bentez, Department of Electrical Engineering, Electronics and Automation of the University of Extremadura, Spain • Fakhrul Alam, Massey University, New Zealand • Fernando J. Álvarez, University of Extremadura, Spain • Grigorios G. Anagnostopoulos, Geneva School of Business Administration, HES-SO, Switzerland 4 IPIN2021 Work-in-Progress • Antonio Angrisano, University of Messina, Italy • Leonid Antsfeld, NAVER LABS Europe, France • Joaqun Aparicio Sosa, University of Oslo, Norway • Oumaya Baala, FEMTO-ST Institute - Universit de Technologie de Belfort- Montbliard, France • Paolo Barsocchi, CNR-ISTI, Italy • Sander Bastiaens, WAVES, INTEC, Ghent University/imec, Belgium • Bastien Bchadergue, University of Versailles Saint-Quentin, France • Óscar Belmonte-Fernndez, University Jaume I, Spain • Boaz Ben-Moshe, Ariel University, Israel • Rafael Berkvens, University of Antwerp - imec, IDLab - Faculty of Applied Engineering, Belgium • Jrg Blankenbach, RWTH Aachen University, Germany • Chris Bleakley, University College Dublin, Ireland • Dina Bousdar, Deutsches Zentrum fuer Luft- und Raumfahrt, Germany • Peter Brida, University of Zilina, Faculty of Electrical Engineering and Infor- mation Technology, Department of Multimedia and ICT, Slovakia • Laura Calvet Lin, Open University of Catalonia, Spain • Neha Chaudhary, University of Aveiro, Portugal • Yuwei Chen, Finnish Geospatial Research Institute, Finland • Stefano Chessa, University of Pisa, Italy • Boris Chidlovskii, Naver Labs Europe, France • Ying-Ren Chien, National Ilan University, Taiwan • Elizabeth Colin, ALLIANSTIC - EFREI Paris, France • Mário Costa, Huawei Technologies Oy (Finland) Co., Ltd., Finland • Antonino Crivello, Institute of Information Science and Technologies, CNR, Italy • Ren Da, CATT, United States • Alessio De Angelis, University of Perugia, Italy • Alvaro De-La-Llana-Calvo, University of Alcala, Spain • Benot Denis, CEA-Leti, France 5 IPIN2021 Work-in-Progress • Qun Ding, CETC, China • Antnio Duarte Costa, Centro ALGORITMI - Universidade do Minho, Portugal • Frdric Evennou, Orange, France • Tobias Feigl, Fraunhofer Institute for Integrated Circuits (IIS), Germany • Gianluigi FERRARI, University of Parma, Italy • Daniele Fontanelli, University of Trento, Italy • Giancarlo Fortino, University of Calabria, Italy • Hassen Fourati, University Grenoble Alpes/GIPSA-Lab, France • Norbert Franke, Fraunhofer Institute Integrated Circuits, Germany • Juan Jess Garca, University of Alcala, Spain • Z Ghassemlooy, Northumbria University, United Kingdom • Michele Girolami, CNR-ISTI, Italy • Jose Guivant, UNSW, Australia • Fredrik Gunnarsson, Ericsson, Sweden • Jan Hajny, Brno University of Technology, Czech Republic • Dongsoo Han, KAIST, Republic of Korea • Suining He, University of Connecticut, United States • Sumi Helal, University of Florida, United States • Alvaro Hernandez, University of Alcala, Spain • Sverre Holm, University of Oslo, Norway • Muhammad Ijaz, Manchester Metropolitan University, United Kingdom • Sampath Jayalath, University of Cape Town, South Africa • Ana Jimenez, UAH, Spain • Antonio R. Jimenez Ruiz, CSIC-Consejo Superior de Investigaciones Cientifi- cas, Spain • Susanna Kaiser, DLR, Germany • Hassan Karimi, University of Pittsburgh, United States • Michel Kasser, HEIG-VD, Yverdon-les-bains, Switzerland • Alexey Khoryaev, Intel Corporation, Russian Federation • Martti Kirkko-Jaakkola, Finnish Geospatial Research Institute, Finland 6 IPIN2021 Work-in-Progress • Stefan Knauth, Stuttgart University of Applied Sciences HFT, Germany • Sebastian Kram, Fraunhofer IIS, Germany • Nicolas Krommenacker, Universit de Lorraine - CRAN UMR CNRS 7039, France • Takeshi Kurata, AIST, Japan • Emily Lam, Rtangent, United States • Christos Laoudias, KIOS Research and Innovation Center of Excellence, Uni- versity of Cyprus, Cyprus • Jose Luis Lazaro, Universidad de Alcal, Spain • Binghao Li, University of NSW, Australia • Ki-Joune Li, Pusan National Univ., Republic of Korea • Thomas Little, Boston University, United States • Elena Simona Lohan, TAU, Finland • David Masip, Universitat Oberta de Catalunya, Spain • Joan Melia-Segui, UOC, Spain • Filipe Meneses, University of Minho, Portugal • Thibaud Michel, Wemap, France • Renato Miyagusuku, Utsunomiya University, Japan • Nader Moayeri, NIST, United States • Raul Montoliu, UJI, Spain • Adriano Moreira, Algoritmi Research Centre, University of Minho, Portugal • Aiden Morrison, SINTEF, Norway • Estefania Munoz Diaz, German Aerospace Center (DLR), Germany • Christopher Mutschler, Fraunhofer IIS, Germany • Luis Nero Alves, University of Aveiro, Portugal • Maria Joo Nicolau, Universidade do Minho, Portugal • Drago Niculescu, University Politehnica of Bucharest, Romania • Maciej Nikodem, Wroclaw University of Science and Technology, Poland • Kai Niu, Beijing University of Posts and Telecommunications, China • Aboelmagd Noureldin, Professor, Canada • Jari Nurmi, Tampere University, Finland 7 IPIN2021 Work-in-Progress • Kyle O’Keefe, University of Calgary, Canada • Aleksandr Ometov, Tampere University, Finland • Miguel Ortiz, IFSTTAR, France • Filippo Palumbo, ISTI CNR, Italy • Neal Patwari, Washington University in St. Louis, United States • Cristiano Pendo, Algoritmi Research Centre, University of Minho, Portugal • Herbert Peremans, Universiteit Antwerpen, Belgium • Maria del Carmen Perez, University of Alcala, Spain • Antoni Perez-Navarro, Universitat Oberta de Catalunya, Spain • Gian Pietro Picco, University of Trento, Italy • David Plets, Ghent University-imec, Belgium • Nirvana Popescu, University Politehnica of Bucharest, Romania • Andrei Popleteev, SnT, University of Luxembourg, Luxembourg • Francesco Potort, CNR - ISTI, Italy • Weizhu Qian, Aalborg University, Denmark • Honglei Qing, BUAA University, China • Niranjini Rajagopal, Amazon, United States • Milan Redzic, Huawei R&D, United Kingdom • Valrie Renaudin, GEOLOC, University Gustave Eiffel, France • Laura Ruotsalainen, University of Helsinki, Finland • Alexandru Rusu-Casandra, University Politehnica Bucharest, Romania • David Salido Monz, ETH Zrich, Switzerland • Nel Samama, IMT/TSP, France • Emilio Sansano, Jaume I University, Spain • Emiliano Schena, Universit Campus Bio-Medico di Roma, Italy • Fernando Seco, CSIC, Spain • Lina SHI, Laboratoire d’Ingénierie des Systèmes de Versailles, Universit Paris- Saclay-UVSQ, France • Yoan Shin, Soongsil University, Republic of Korea • Gyula Simon, buda University, Hungary 8 IPIN2021 Work-in-Progress • Isaac Skog, Linkping University, Sweden • Franois Spies, University of Franche-Comte, France • Heidi Steendam, Ghent University, Belgium • Harald Sternberg, HafenCity University Hamburg, Germany • Nobby Stevens, KU Leuven, Belgium • Masanori Sugimoto, Hokkaido University, Japan • Melania Susi, Joint Research Centre, European Commission, Italy • Joaquín Torres-Sospedra, UBIK Geospatial Solutions S.L., Spain • Antonios Tsourdos, Cranfield University, United Kingdom • Hideaki Uchiyama, Nara Institute of Science and Technology, Japan • Jess Urea Urea, University of Alcala, Spain • Alexandre Vervisch, Telecom SudParis, France • Jos Vieira, Universidade de Aveiro, Portugal • Xavier Vilajosana, Universitat Oberta de Catalunya, Spain • Ulrich Walder, TU Graz, Austria • Jinling Wang, UNSW Australia, Australia • Dongyan Wei, Aerospace Information Research Institute(AIR), Chinese Academy of Sciences (CAS), China • Andreas Wieser, ETH Zrich, Switzerland • Huaming Wu, Tianjin University, China • Lu Yin, Beijing University of Posts and Telecommunications, China • Xun Zhang, Prof., France • Kefei Zhang, RMIT University, Australia 9