WiFi-Based Real-Time Location Tracking: Is It the Right Choice for Your Asset Management?

WiFi-based real‑time location tracking (RTLS) is one of the simplest methods to pinpoint assets indoors. A WiFi tag emits a beacon, which is received by multiple time‑synchronised access points (APs). The APs stamp the signal with a timestamp, forward the data to a location server, and the software triangulates the tag’s position.

Leading RTLS platforms such as Ekahau and AiRISTA routinely use WiFi for asset monitoring in hospitals, warehouses, and manufacturing plants. However, before you commit to a WiFi solution, evaluate the following five factors to ensure it meets your operational needs.

1. Cost

WiFi tags are generally pricier than alternatives like active RFID or infrared. Typical units run between $40 and $60, with some models costing up to $90. They also tend to be larger and consume more power. If you need ultra‑compact tags or are tracking low‑value assets, a cheaper technology may be preferable.

2. Infrastructure

Deploying WiFi RTLS requires a dense AP footprint. If your existing network isn’t already designed for high‑density coverage, you’ll need to upgrade, which can be costly and disruptive. If an upgrade isn’t viable, consider solutions such as AirFinder, which demand minimal infrastructure changes.

3. Location Accuracy

WiFi RTLS typically delivers 3–5 m accuracy using time‑difference‑of‑arrival (TDOA) with wide‑band signals. Achieving this precision demands at least three APs per tag. Verify that you can install enough APs to maintain the desired accuracy.

4. Security

Most WiFi tags transmit unassociated beacons that do not join your corporate network, so they pose little security risk. Nonetheless, if you plan to integrate network‑connected sensors (e.g., environmental monitors), ensure they adhere to your IT security policies.

5. Operating Mode

WiFi excels at indoor tracking thanks to its short range. Outdoor tracking is possible but usually less reliable. For applications that span indoor and outdoor environments, hybrid solutions that combine active RFID, LTE‑M, or GPS are often more suitable.

In short, WiFi RTLS can be an excellent fit when you have recently installed dense WiFi coverage and are tracking high‑value assets that justify the tag cost. If you’re unsure, contact us to explore how AirFinder or other technologies might better serve your needs.