MST Mote

Real Time Location Service (RTLS) Using Received Signal Strength Indicator (RSSI) (Watch Video Demos)

 

Applications

· Creating visibility in a production environment

· Localizing components and tools on a shop floor

· Commercially available RTLS solutions are costly

· Low cost solution with adequate localization accuracy is needed to become economically viable for enterprise-wide deployment

Real life applications of RTLS

Methods

·  Time

· ToA : requires transmitter, receiver synchronization

· TDoA : requires synchronization between all receivers

· Highly affected by non-line-of-sight propagation

· Angle

· AoA : requires special antennas

· Also affected by non-line-of-sight propagation

· Signal Strength

· Radio signal strength indicator (RSSI) is universally available in radio frequency (RF) devices

· Low cost solution since no specialized hardware required

· However, challenges related to accuracy of RSSI-based solution exist

· Prior profiling required

· Profiles need updating from time to time

· Small scale and temporal variations in signal strength compromise accuracy.

Spatial Diversity RTLS Receiver

Web Interface