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    • openAccess   A Comprehensive and Reproducible Comparison of Clustering and Optimization Rules in Wi-Fi Fingerprinting2020 

      Torres-Sospedra, Joaquín; Richter, Philipp; Moreira, Adriano; Mendoza-Silva, Germán Martín; Lohan, Elena Simona; Trilles, Sergio; Matey-Sanz, Miguel; Huerta, Joaquin IEEE (2020-08-17)
      Wi-Fi fingerprinting is a well-known technique used for indoor positioning. It relies on a pattern recognition method that compares the captured operational fingerprint with a set of previously collected reference samples ...

    • openAccess   A Meta-Review of Indoor Positioning Systems 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Huerta, Joaquin MDPI (2019)
      An accurate and reliable Indoor Positioning System (IPS) applicable to most indoor scenarios has been sought for many years. The number of technologies, techniques, and approaches in general used in IPS proposals is ...

    • openAccess   Agent-based parking occupancy simulation 

      Mendoza-Silva, Germán Martín Universitat Jaume I (2015)
      The existing parking simulations, as most simulations, are intended to gain insights of a system or to make predictions. The knowledge they have provided has built up over the years, and several research works have devised ...

    • openAccess   An occupancy simulator for a smart parking system: Developmental design and experimental considerations 

      Mendoza-Silva, Germán Martín; Gould, Michael; Montoliu Colás, Raul; Torres-Sospedra, Joaquín; Huerta, Joaquin MDPI (2019-05)
      This paper presents the development of a parking occupancy simulator to support a smart parking system. The simulator uses an agent-based approach to model drivers who follow activity plans and who may or may not use the ...

    • openAccess   Beyond Euclidean Distance for Error Measurement in Pedestrian Indoor Location 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Potortì, Francesco; Moreira, Adriano; Knauth, Stefan; Berkvens, Rafael; Huerta, Joaquin Institute of Electrical and Electronics Engineers (2020-09-04)
      Indoor positioning systems (IPSs) suffer from a lack of standard evaluation procedures enabling credible comparisons: this is one of the main challenges hindering their widespread market adoption. Traditionally, accuracy ...

    • openAccess   BLE RSS Measurements Dataset for Research on Accurate Indoor Positioning 

      Mendoza-Silva, Germán Martín; Matey-Sanz, Miguel; Torres-Sospedra, Joaquín; Huerta, Joaquin MDPI (2019-03)
      RSS-based indoor positioning is a consolidated research field for which several techniques have been proposed. Among them, Bluetooth Low Energy (BLE) beacons are a popular option for practical applications. This paper ...

    • openAccess   Comparing the Performance of Indoor Localization Systems through the EvAAL Framework 

      Potortì, Francesco; Park, Sangjoon; Jimenez Ruiz, Antonio Ramon; Barsocchi, Paolo; GIROLAMI, MICHELE; Crivello, Antonino; Lee, So-Yeon; Lim, Jae Hyun; Torres-Sospedra, Joaquín; Seco, Fernando; Montoliu Colás, Raul; Mendoza-Silva, Germán Martín; María del Carmen, Pérez Rubio; Cristina, Losada Gutiérrez; Espinosa, Felipe; Macias-Guarasa, Javier MDPI (2017)
      In recent years, indoor localization systems have been the object of significant research activity and of growing interest for their great expected social impact and their impressive business potential. Application areas ...

    • openAccess   Discovering location based services: A unified approach for heterogeneous indoor localization systems 

      Furfari, Francesco; Crivello, Antonino; Baronti, Paolo; Barsocchi, Paolo; GIROLAMI, MICHELE; Palumbo, Filippo; Quezada Gaibor, Darwin; Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín Elsevier B.V. (2021-03-01)
      The technological solutions and communication capabilities offered by the Internet of Things paradigm, in terms of raising availability of wearable devices, the ubiquitous internet connection, and the presence on the ...

    • openAccess   Environment-Aware Regression for Indoor Localization based on WiFi Fingerprinting 

      Mendoza-Silva, Germán Martín; Costa, Ana Cristina; Torres-Sospedra, Joaquín; Painho, Marco; Huerta, Joaquin Institute of Electrical and Electronics Engineers (2021-04-19)
      Data enrichment through interpolation or regression is a common approach to deal with sample collection for Indoor Localization with WiFi fingerprinting. This paper provides guidelines on where to collect WiFi samples, and ...

    • openAccess   Evaluating Indoor Positioning Systems in a Shopping Mall: The Lessons Learned From the IPIN 2018 Competition 

      Renaudin, Valerie; Ortiz, Miguel; PERUL, Johan; Torres-Sospedra, Joaquín; Jiménez, Antonio R.; Perez-Navarro, Antoni; Mendoza-Silva, Germán Martín; Seco, Fernando; Landau, Yael; Marbel, Revital; Ben-Moshe, Boaz; Zheng, Xingyu; Feng, Ye; Kuang, Jian; Li, Yu; Niu, Xiaoji; Landa, Vlad; Hacohen, Shlomi; shvalb, Nir; Lu, Chuanhua; Uchiyama, Hideaki IEEE (2019-09-30)
      The Indoor Positioning and Indoor Navigation (IPIN) conference holds an annual competition in which indoor localization systems from different research groups worldwide are evaluated empirically. The objective of this ...

    • openAccess   Local-level Analysis of Positioning Errors in Wi-Fi Fingerprinting 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Huerta, Joaquin IEEE (2021-04-25)
      Nowadays, Location Based Services run over a net of heterogeneous devices (mainly smartphones) with different location capabilities thanks to, for instance, signals of opportunity as Wi-Fi. In contrast to professional ...

    • closedAccess   Locations Selection for Periodic Radio Map Update in WiFi Fingerprinting 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Huerta, Joaquin Springer (2018)
      The construction and update of a radio map are usually referred as the main drawbacks of WiFi fingerprinting, a very popular method in indoor localization research. For radio map update, some studies suggest taking new ...

    • openAccess   Long-Term WiFi Fingerprinting Dataset for Research on Robust Indoor Positioning 

      Mendoza-Silva, Germán Martín; Richter, Philipp; Torres-Sospedra, Joaquín; Lohan, Elena Simona; Huerta, Joaquin MDPI (2018-01-16)
      WiFi fingerprinting, one of the most popular methods employed in indoor positioning, currently faces two major problems: lack of robustness to short and long time signal changes and difficult reproducibility of new methods ...

    • openAccess   New Cluster Selection and Fine-grained Search for k-Means Clustering and Wi-Fi Fingerprinting 

      Torres-Sospedra, Joaquín; Quezada Gaibor, Darwin; Mendoza-Silva, Germán Martín; Nurmi, Jari; Koucheryavy, Yevgeni; Huerta, Joaquin IEEE (2020-06-02)
      Wi-Fi fingerprinting is a popular technique for Indoor Positioning Systems (IPSs) thanks to its low complexity and the ubiquity of WLAN infrastructures. However, this technique may present scalability issues when the ...

    • openAccess   Off-Line Evaluation of Mobile-Centric Indoor Positioning Systems: The Experiences from the 2017 IPIN Competition 

      Torres-Sospedra, Joaquín; Jiménez, Antonio R.; Moreira, Adriano; Lungenstrass, Tomás; Lu, Wei-Chung; Knauth, Stefan; Mendoza-Silva, Germán Martín; Seco, Fernando; Perez-Navarro, Antoni; Nicolau, Maria João; Costa, António; Meneses, Filipe; Farina, Joaquín; Morales, Juan Pablo; Lu, Wen-Chen; Cheng, Ho-Ti; Yang, Shi-Shen; Fang, Shih-Hau; Chien, Ying-Ren; Tsao, Yu MDPI (2018)
      The development of indoor positioning solutions using smartphones is a growing activity with an enormous potential for everyday life and professional applications. The research activities on this topic concentrate on the ...

    • openAccess   Providing Databases for Different Indoor Positioning Technologies: Pros and Cons of Magnetic Field and Wi-Fi Based Positioning 

      Torres-Sospedra, Joaquín; Montoliu Colás, Raul; Mendoza-Silva, Germán Martín; Belmonte-Fernández, Óscar; Rambla Risueño, David; Huerta, Joaquin Hindawi Publishing Corporation (2016)
      Localization is one of the main pillars for indoor services. However, it is still very difficult for the mobile sensing community to compare state-of-the-art indoor positioning systems due to the scarcity of publicly ...

    • openAccess   Situation Goodness Method for Weighted Centroid-Based Wi-Fi APs Localization 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Huerta, Joaquin; Montoliu Colás, Raul; Benítez, Fernando; Belmonte-Fernández, Óscar Springer (2016-10-13)
      Knowing the location of Wi-Fi antennas may be critical for indoor localization. However, in a real environment, their positions may be unknown since they can be managed by external entities. This paper introduces a new ...

    • openAccess   The IPIN 2019 Indoor Localisation Competition—Description and Results 

      Potortì, Francesco; Park, Sangjoon; Crivello, Antonino; Palumbo, Filippo; GIROLAMI, MICHELE; Barsocchi, Paolo; Lee, Soyeon; Torres-Sospedra, Joaquín; Jimenez Ruiz, Antonio Ramon; Perez-Navarro, Antoni; Mendoza-Silva, Germán Martín; Seco, Fernando; ortiz, miguel; PERUL, Johan; Renaudin, Valerie; Kang, Hyunwoong; Park, Soyoung; Lee, Jae Hong; Park, Chan Gook; Ha, Jisu; Han, JaeSeung; Park, Changjun; Kim, Keunhye; Lee, Yonghyun; Gye, Seunghun; lee, keumryeol; Kim, Eunjee; Choi, Jeongsik; choi, Yang-Seok; Talwar, Shilpa; Cho, Seong Yun; Ben-Moshe, Boaz; Scherbakov, Alex; Antsfeld, Leonid; Sansano-Sansano, Emilio; Chidlovskii, Boris; Kronenwett, Nikolai; Prophet, Silvia; Landay, Yael; Marbel, Revital; Zheng, Lingxiang; Peng, Ao; Lin, Zhichao; Wu, Bang; Ma, Chengqi; Poslad, Stefan; Selviah, David; Wu, Wei; Ma, Zixiang; Zhang, Wenchao; Wei, Dongyan; Yuan, Hong; Jiang, Jun-Bang; Huang, Shao-Yung; Liu, Jing-Wen; Su, Kuan-Wu; Leu, Jenq-Shiou; Nishiguchi, Kazuki; BOUSSELHAM, Walid; Uchiyama, Hideaki; Thomas, Diego; Shimada, Atsushi; Taniguchi, Rin-ichiro; Cortés Puschel, Vicente; Lungenstrass, Tomás; Ashraf, Imran; Lee, Chanseok; Ali, Muhammad Usman; Im, Yeongjun; Kim, Gunzung; Eom, Jeongsook; Hur, Soojung; Park, Yongwan; Opiela, Miroslav; Moreira, Adriano; Nicolau, Maria João; Pendão, Cristiano; Silva, Ivo; Meneses, Filipe; Costa, António; Trogh, Jens; Plets, David; Chien, Ying-Ren; Chang, Tzu-Yu; Fang, Shih-Hau; Tsao, Yu IEEE (2020-11-10)
      IPIN 2019 Competition, sixth in a series of IPIN competitions, was held at the CNR Research Area of Pisa (IT), integrated into the program of the IPIN 2019 Conference. It included two on-site real-time Tracks and three ...

    • openAccess   The Smartphone-Based Offline Indoor Location Competition at IPIN 2016: Analysis and FutureWork 

      Torres-Sospedra, Joaquín; Jiménez, Antonio R.; Knauth, Stefan; Moreira, Adriano; Beer, Yair; Fetzer, Toni; TA, Viet Cuong; Montoliu Colás, Raul; Seco, Fernando; Mendoza-Silva, Germán Martín; Belmonte-Fernández, Óscar; Koukofikis, Athanasios; Nicolau, Maria João; Costa, António; Meneses, Filipe; Ebner, Frank; Deinzer, Frank; Vaufreydaz, Dominique; Dao, Trung Kien; Castelli, Eric MDPI (2017)
      This paper presents the analysis and discussion of the off-site localization competition track, which took place during the Seventh International Conference on Indoor Positioning and Indoor Navigation (IPIN 2016). Five ...