Indoor Self-Localization in a WSN, based on Time Of Flight: Propositions and Demonstrator

Réjane Dalcé (1) , Adrien van den Bossche (1, 2) , Thierry Val (1, 2)

1 IRIT-RMESS - Réseaux, Mobiles, Embarqués, Sans fil, Satellites
2 UT2J - Université Toulouse - Jean Jaurès

IEEE 802.15.4 is a widely adopted foundation for the lower layers of wireless sensor networks. This standard has recently started to take localization into account. This has led to the addition of two new PHY layers, Ultra-Wide Band (UWB) and Chirp Spread Spectrum (CSS), but also the specification of a Time Of Flight-based ranging protocol named Symmetric Double-Sided Two-Way Ranging (SDS-TWR). This paper describes the results obtained from a CSS-based prototype using a variant of SDS-TWR. Our solution differs from others exploiting the same tools by not involving a localization server. The location estimation algorithm is executed by the mobile node, right after the ranging phase. The obtained localization error is generally under 200cm in 90% of the situations and the mean error is around 1m.

Mots clés: Wireless sensor network; Demonstrator; Localization; Positioning; Time of flight; 802.15.4

Domaines: Réseaux et télécommunications [cs.NI]; Système d'exploitation [cs.OS]; Architectures Matérielles [cs.AR]; Systèmes embarqués

Réjane Dalcé, Adrien van den Bossche, Thierry Val. Indoor Self-Localization in a WSN, based on Time Of Flight: Propositions and Demonstrator. IEEE International Conference on Indoor Positioning and Indoor Navigation - IPIN 2013, Oct 2013, Montbelliard, France. pp. 1-6. ⟨hal-01151015⟩