Fuzzy Sets and Systems: Theory and Applications
Fuzzy Sets and Systems: Theory and Applications
Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Range-free localization schemes for large scale sensor networks
Proceedings of the 9th annual international conference on Mobile computing and networking
Impact of radio irregularity on wireless sensor networks
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Resilient Localization for Sensor Networks in Outdoor Environments
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
Protocols and Architectures for Wireless Sensor Networks
Protocols and Architectures for Wireless Sensor Networks
A practical evaluation of radio signal strength for ranging-based localization
ACM SIGMOBILE Mobile Computing and Communications Review
Wireless sensor network localization techniques
Computer Networks: The International Journal of Computer and Telecommunications Networking
International Journal of Sensor Networks
A soft computing approach to localization in wireless sensor networks
Expert Systems with Applications: An International Journal
Organizing a global coordinate system from local information on an ad hoc sensor network
IPSN'03 Proceedings of the 2nd international conference on Information processing in sensor networks
Mobile element assisted cooperative localization for wireless sensor networks with obstacles
IEEE Transactions on Wireless Communications
RSD: A Metric for Achieving Range-Free Localization beyond Connectivity
IEEE Transactions on Parallel and Distributed Systems
Time synchronization in sensor networks: a survey
IEEE Network: The Magazine of Global Internetworking
Range-free mobile node localization using static anchor
WASA'13 Proceedings of the 8th international conference on Wireless Algorithms, Systems, and Applications
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The sensor node localization with an acceptable accuracy is a fundamental and important problem for location-aware applications of wireless sensor networks (WSNs). Among numerous localization schemes proposed specifically for WSNs, the received signal strength (RSS) based range-free localization techniques have attracted considerable research interest for their simplicity and low cost. However, these techniques suffer from significant estimation errors due to low accuracy of RSS measurements influenced by irregular radio propagation. In order to cope with the problem of RSS uncertainty, in this paper we propose a fuzzy set-based localization method, called fuzzy ring overlapping range free (FROFR) localization. Similar to other area-based localization schemes, FRORF relies on beacon signals broadcasted by anchors to isolate a region of the localization space where the sensor node most probably resides. As an extension to the concept of ring-overlapping localization, FRORF first represents overlapping rings as fuzzy sets with ambiguous boundaries in contrast to fixed intervals of RSS values, and then generates fuzzy set of regions by intersecting rings from different fuzzy ring sets. The degrees of sensor node membership to regions in the fuzzy set of regions are used to determine the location estimate. The results obtained from simulations demonstrate that our solution improve localization accuracy in the presence of radio irregularity, and even for the case without radio irregularity.