Outline Defining location Methods for determining location Triangulation trilateration ssl, etc ° Location Systems
Outline • Defining location • Methods for determining location • Triangulation, trilateration, RSSI, etc. • Location Systems
Approaches for Determining Location Localization algorithms ° Proximity e Lateration ° Angulation ●RSS OA. TDOA ° Fingerprinting Distance estimates Time of flight Signal Strength Attenuation
Approaches for Determining Location • Localization algorithms • Proximity • Lateration • Angulation • RSSI • ToA, TDoA • Fingerprinting • Distance estimates • Time of Flight • Signal Strength Attenuation
Proximity Simplest positioning technique Closeness to a reference point It can be used to decide whether a node is in the proximity of an anchor Based on loudness, physical contact, etc Can be used for positioning when several overlapping anchors are avallable Centronoid localization
Proximity • Simplest positioning technique • Closeness to a reference point • It can be used to decide whether a node is in the proximity of an anchor • Based on loudness, physical contact, etc. • Can be used for positioning when several overlapping anchors are available • Centronoid localization
Lateration Measure distance between device and reference points 3 reference points needed for 2d and 4 for 3D
Lateration • Measure distance between device and reference points • 3 reference points needed for 2D and 4 for 3D
Lateration vs Angulation When distances between entities are used the approach is called lateration when angles between nodes are used one talks about angulation
Laterationvs. Angulation • When distances between entities are used, the approach is called lateration • when angles between nodes are used, one talks about angulation