Accurate GSM Indoor Localization

At Ubicomp2005 Veljo Otsason will present his very interesting work on fine-grained GSM positioning.

Accurate GSM Indoor Localization, Veljo Otsason, Alex Varshavsky, Anthony La Marca and Eyal de Lara, The Seventh International Conference on Ubiquitous Computing (UbiComp 2005), Tokyo, Japan, September 2005

He shows a way to make accurate GSM-based indoor localization by using wide signal-strength fingerprints in addition to the 6-strongest cells traditionally used in the GSM standard. The wide fingerprint includes readings from additional cells that are strong enough to be detected, but too weak to be used for efficient communication. Experiments conducted on three multi-floor buildings show that our system achieves accuracy comparable to an 802.11-based implementation, and can accurately differentiate between floors in both wooden and steel-reinforced concrete structures.

This paper is mainly based on Veljo’s Master’s thesis “Accurate Indoor Localization Using Wide GSM Fingerprinting“