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No need to war-drive: unsupervised indoor localization

Wang, He, Sen, Souvik, Elgohary, Ahmed, Farid, Moustafa, Youssef, Moustafa, Choudhury, Romit Roy·2012·Proceedings of the 10th international conference on Mobile systems, applications, and services

Abstract

We propose UnLoc, an unsupervised indoor localization scheme that bypasses the need for war-driving. Our key observation is that certain locations in an indoor environment present identifiable signatures on one or more sensing dimensions. An elevator, for instance, imposes a distinct pattern on a smartphone's accelerometer; a corridor-corner may overhear a unique set of WiFi access points; a specific spot may experience an unusual magnetic fluctuation. We hypothesize that these kind of signatures naturally exist in the environment, and can be envisioned as internal landmarks of a building. Mobile devices that "sense" these landmarks can recalibrate their locations, while dead-reckoning schemes can track them between landmarks. Results from 3 different indoor settings, including a shopping mall, demonstrate median location errors of 1:69m. War-driving is not necessary, neither are floorplans the system simultaneously computes the locations of users and landmarks, in a manner that they converge reasonably quickly. We believe this is an unconventional approach to indoor localization, holding promise for real-world deployment.

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Metadata

Authors
Wang, H., Sen, S., Elgohary, A., Farid, M., Youssef, M., & Choudhury, R. R.
Venue
Proceedings of the 10th international conference on Mobile systems, applications, and services
Publisher
ACM
Published
2012-06-25
Pages
197-210
OpenAlex
W2054602086
Cited by
828
References
24
FWCI
106.44
Type
conference paper
Language
en
Open access
closed

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CoChat. (2026). Citation check: No need to war-drive: unsupervised indoor localization. https://app.cochat.ai/papers/10.1145/2307636.2307655
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Wang, H., Sen, S., Elgohary, A., Farid, M., Youssef, M., & Choudhury, R. R. (2012). No need to war-drive: unsupervised indoor localization. Proceedings of the 10th international conference on Mobile systems, applications, and services. https://doi.org/10.1145/2307636.2307655

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