TrackPoint Deployed at Airports Reader TagAssist Antennas Baggage Tag Reader Client (a)Version 1.0 (b)Version 2.0 (c)Internal structure 签后超 Industrial TagAssist computer (a)Two TrackPoints (b)Version 2.0
TrackPoint Deployed at Airports Reader Industrial computer
2 State-of-the-art
State-of-the-art
State-of-the-art Techniques 1 RSS based Methods reader antenna 0 337.5 22.5 315 45 292.5 67.5 270 90 247.5 112.5 225 135 =肌S 202.5 157.5 180 Orientation VS RSS RSS is not a reliable location indicator especially for UHF tags
State-of-the-art Techniques 1 RSS based Methods RSS is not a reliable location indicator especially for UHF tags Orientation VS RSS
State-of-the-art Techniques 2 Phase based Methods Left wall Ref tag Right wall Desired tag Ref tag non-line-of-sight 0 Perspective 1 Pinlt's receiver Perspective 2 PinIt (SIGCOMM 2013) RF-Compass(MobiCom 2013) Needs to deploy dense reference tags
2 Phase based Methods PinIt (SIGCOMM 2013) RF-Compass (MobiCom 2013) Needs to deploy dense reference tags State-of-the-art Techniques
Summary of Challenges Need mm-level localization accuracy achieved especially for mobile tags. >Small overhead,COTS devices infeasible for using many references for a tracking system spanning a long pipeline. Fast-changing environment multipath reflection of RF signals varied orientation of tags 。Doppler effect
Summary of Challenges Ø Need mm-level localization accuracy achieved • especially for mobile tags. Ø Small overhead, COTS devices • infeasible for using many references for a tracking system spanning a long pipeline. Ø Fast-changing environment • multipath reflection of RF signals • varied orientation of tags • Doppler effect