Overview: Location Services [RTLS]

Location Services is also known as RTLS or Real-Time Location Services

RTLS Basic Rules:

• Deploy minimum of 4 AP per floor.
• One AP around client in each quadrant.
• -75 dBm Client RSSI on 3 APs.
• Create a convex hull around location area.

Location Tracking Methods

Four Basis Categories of Systems to determine the position.

• Cell of Origin:
  • uses the highest signal strength technique to locate.
• Distance-Based:
  • also called as Trilateration.
  • uses received signal strength [RSS].
  • measured by mobile device or receiving sensor.
• Angle-Based:
  • also called Angulation.
  • Angle of Arrival [AoA] locates the mobile station by determining the angle of incidence at which signals arrive at the receiving sensor.
  • requires two receiving sensors for location estimations.
  • needed at least three or more receiving sensors (triangulation) to improve accuracy.
• Location Patterning:
  • also called Fingerprinting.
  • based on sampling and recording of radio signal behavior patterns in specific environments.
  • each potential device location possesses a distinctly unique RF signature.