Affiliation:
1. School of Software and BNRist, Tsinghua University, China
2. School of Intelligent Systems Engineering, Sun Yat-sen University, China
Abstract
Among numerous indoor localization systems, WiFi fingerprint-based localization has been one of the most attractive solutions, which is known to be free of extra infrastructure and specialized hardware. To push forward this approach for wide deployment, three crucial goals on high deployment ubiquity, high localization accuracy, and low maintenance cost are desirable. However, due to severe challenges about signal variation, device heterogeneity, and database degradation root in environmental dynamics, pioneer works usually make a trade-off among them. In this article, we propose iToLoc, a deep learning-based localization system that achieves all three goals simultaneously. Once trained, iToLoc will provide accurate localization service for everyone using different devices and under diverse network conditions, and automatically update itself to maintain reliable performance anytime. iToLoc is purely based on WiFi fingerprints without relying on specific infrastructures. The core components of iToLoc are a domain adversarial neural network and a co-training-based semi-supervised learning framework. Extensive experiments across 7 months with eight different devices demonstrate that iToLoc achieves remarkable performance with an accuracy of 1.92 m and >95% localization success rate. Even 7 months after the original fingerprint database was established, the rate still maintains >90%, which significantly outperforms previous works.
Funder
National Key Research Plan
NSFC
Publisher
Association for Computing Machinery (ACM)
Subject
Computer Networks and Communications
Reference64 articles.
1. WiDeep: WiFi-based Accurate and Robust Indoor Localization System using Deep Learning
2. Maximilian Arnold, Jakob Hoydis, and Stephan ten Brink. 2019. Novel massive MIMO channel sounding data applied to deep learning-based indoor positioning. In Proceedings of the 12th International ITG Conference on Systems, Communications and Coding (SCC’19). VDE.
3. Deep learning based wireless localization for indoor navigation
4. RADAR: an in-building RF-based user location and tracking system
5. A discriminative model for semi-supervised learning