CCNP Wireless 642-747 IUWMS Summary Notes 2 : Location Tracking Techniques – Cell of Origin

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Tracking systems are classified by the measurement technique that they use. Real Time Location Systems (RTLS) are grouped into the following:

  • Cell of Origin ( Nearest Cell)
  • Lateration ( depending on Distance)
  • Angulation (depending on the angle)
  • Location patterning ( pattern recognition)

Cell of Origin

The tracking position is based on proximity and is determined by using the associated access point.

Advantages:

  1. Very easy to implement. No complicated algorithms used.
  2. Very fast technique as no complicated algorithms are used.

Disadvantages:

  1. Lacks granularity, hence may be difficult to locate devices in multi-storied environments, as exact position cannot be calculated.

How to improve this technique:

  1. Increase granularity by using highest RSSI cell instead of cell of origin.

Where and when used:

  1. Used when precise location tracking is not needed.

References:

  1. Wi-Fi Location-Based Services 4.1 Design Guide by Cisco Press.
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