{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:19:20Z","timestamp":1760242760381,"version":"build-2065373602"},"reference-count":19,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2016,6,27]],"date-time":"2016-06-27T00:00:00Z","timestamp":1466985600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>User location is crucial context information for future smart homes where many location based services will be proposed. This location necessarily means that User Location Discovery (ULD) will play an important role in future smart homes. Concerns about privacy and the need to carry a mobile or a tag device within a smart home currently make conventional ULD systems uncomfortable for users. Future smart homes will need a ULD system to consider these challenges. This paper addresses the design of such a ULD system for context-aware services in future smart homes stressing the following challenges: (i) users\u2019 privacy; (ii) device-\/tag-free; and (iii) fault tolerance and accuracy. On the other hand, emerging new technologies, such as the Internet of Things, embedded systems, intelligent devices and machine-to-machine communication, are penetrating into our daily life with more and more sensors available for use in our homes. Considering this opportunity, we propose a ULD system that is capitalizing on the prevalence of sensors for the home while satisfying the aforementioned challenges. The proposed sensor network-based and user-friendly ULD system relies on different types of inexpensive sensors, as well as a context broker with a fuzzy-based decision-maker. The context broker receives context information from different types of sensors and evaluates that data using the fuzzy set theory. We demonstrate the performance of the proposed system by illustrating a use case, utilizing both an analytical model and simulation.<\/jats:p>","DOI":"10.3390\/s16070969","type":"journal-article","created":{"date-parts":[[2016,6,27]],"date-time":"2016-06-27T12:56:01Z","timestamp":1467032161000},"page":"969","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Sensor Network-Based and User-Friendly User Location Discovery for Future Smart Homes"],"prefix":"10.3390","volume":"16","author":[{"given":"Ehsan","family":"Ahvar","sequence":"first","affiliation":[{"name":"Institut Mines-Telecom, Telecom SudParis, Evry 91011, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2155-5553","authenticated-orcid":false,"given":"Gyu","family":"Lee","sequence":"additional","affiliation":[{"name":"Liverpool John Moores University, Liverpool L3 3AF, UK"}]},{"given":"Son","family":"Han","sequence":"additional","affiliation":[{"name":"Institut Mines-Telecom, Telecom SudParis, Evry 91011, France"}]},{"given":"Noel","family":"Crespi","sequence":"additional","affiliation":[{"name":"Institut Mines-Telecom, Telecom SudParis, Evry 91011, France"}]},{"given":"Imran","family":"Khan","sequence":"additional","affiliation":[{"name":"Schneider Electric Ind., Corporate Research Center, Technology, Grenoble 38000, France"}]}],"member":"1968","published-online":{"date-parts":[[2016,6,27]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"An Indoor Localization System for Telehomecare Applications","volume":"PP","author":"Ballardini","year":"2015","journal-title":"IEEE Trans. Syst. Man Cybern. Syst."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1109\/MSP.2015.2503881","article-title":"Monitoring Activities of Daily Living in Smart Homes:Understanding human behaviour","volume":"33","author":"Debes","year":"2016","journal-title":"IEEE Signal Process. Mag."},{"key":"ref_3","unstructured":"Rieger, A. (2011). Framework for Building Situation-Aware Ubiquitous Services in Smart Home Environments. [Ph.D. Thesis, Technical University Berlin]."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Saizmaa, T., and Kim, H.-C. (2008, January 11\u201313). Smart Home Design: Home or House?. Proceedings of the Third 2008 International Conference on Convergence and Hybrid Information Technology, Busan, Korea.","DOI":"10.1109\/ICCIT.2008.286"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Yu, C.-R., Wu, C.-L., Lu, C.-H., and Fu, L.-C. (2006, January 8\u201311). Human Localization via Multi-Cameras and Floor Sensors in Smart Home. Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, Taipei, China.","DOI":"10.1109\/ICSMC.2006.384726"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1109\/2.940014","article-title":"Location Systems for Ubiquitous Computing","volume":"34","author":"Hightower","year":"2010","journal-title":"Computer"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/JPROC.2013.2266858","article-title":"Wireless architectures for heterogeneous sensing in smart home applications: Concepts and real implementation","volume":"101","author":"Viani","year":"2013","journal-title":"Proc. IEEE"},{"key":"ref_8","unstructured":"Wilson, A.J. (2010). Device-free localization with received signal strength measurement in wireless networks. [Ph.D. Thesis, University of Utah]."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"621","DOI":"10.1109\/TMC.2009.174","article-title":"Radio tomographic imaging with wireless networks","volume":"9","author":"Wilson","year":"2010","journal-title":"IEEE Trans. Mobile Comput."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"806","DOI":"10.1109\/TRO.2013.2248535","article-title":"3-D localization of human based on an inertial capture system","volume":"29","author":"Yuan","year":"2013","journal-title":"IEEE Trans. Robot."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"839","DOI":"10.1109\/TPDS.2012.179","article-title":"WILL: Wireless indoor localization without site survey","volume":"24","author":"Wu","year":"2013","journal-title":"IEEE Trans. Parallel Distrib. Syst."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Suzuki, T., Takizawa, K., and Ikegami, T. (2013, January 6\u20138). A study on human body localization while walking in an indoor environment by using UWB signal with multiple antennas. Proceedings of the 7th International Symposium on Medical Information and Communication Technology (ISMICT), Tokyo, Japan.","DOI":"10.1109\/ISMICT.2013.6521715"},{"key":"ref_13","first-page":"1400","article-title":"Distributed target localization and tracking with wireless pyroelectric sensor networks","volume":"6","author":"Shen","year":"2013","journal-title":"Int. J. Smart Sens. Intell. Syst."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Yang, D., Sheng, W., and Zeng, R. (2015, January 8\u201312). Indoor Human Localization Using PIR Sensors and Accessibility Map. Proceedings of the 5th Annual IEEE International Conference on Cyber Technology in Automation, Control and Intelligent Systems, Shenyang, China.","DOI":"10.1109\/CYBER.2015.7288004"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Chattopadhyay, D., and Dasgupta, R. (2012, January 21\u201322). A survey of available sensor data modeling techniques. Proceedings of the National Conference on Computing and Communication Systems, Durgapur, India.","DOI":"10.1109\/NCCCS.2012.6413001"},{"key":"ref_16","unstructured":"Abraham, J.K., Sullivan, S., and Ranganathan, S. (September, January 30). Low-cost and disposable pressure sensor mat for non-invasive sleep and movement monitoring applications. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society\u2014EMBC, Boston, MA, USA."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"338","DOI":"10.1016\/S0019-9958(65)90241-X","article-title":"Fuzzy sets","volume":"8","author":"Zadeh","year":"1965","journal-title":"Inform. Control"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Ahvar, E., Lee, G.M., and Crespi, N. (2013, January 7\u20138). A Cloud-based Platform for Watching Same Content on Three-Screen TV Continuously in Smart Home. Proceedings of the IEEE International Conference on Information Science and Cloud Computing Companion (ISCC-C), Guangzhou, China.","DOI":"10.1109\/ISCC-C.2013.9"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1109\/JIOT.2014.2388131","article-title":"DPWSim: A Devices Profile for Web Services (DPWS) Simulator","volume":"2","author":"Han","year":"2015","journal-title":"IEEE Internet Things J."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/7\/969\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:24:51Z","timestamp":1760210691000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/16\/7\/969"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,6,27]]},"references-count":19,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2016,7]]}},"alternative-id":["s16070969"],"URL":"https:\/\/doi.org\/10.3390\/s16070969","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2016,6,27]]}}}