When evaluating a specific radio environment model to see if, where, and how the accuracy could be improved, it can be helpful to have a look at the Survey Coverage, RF Coverage, and Media Error maps.
When reviewing the Median Error map, if you find that the provided median error does not meet your use case requirements, it is time to consider how to improve accuracy.
Step 1 – More Surveys
Have you performed surveys in all building areas where you intend to use the indoor positioning? If not, conduct more surveys.
Step 2 – Increase Wi-Fi and Bluetooth coverage
Do you have Wi-Fi and Bluetooth coverage in all areas of the building where you plan to use indoor positioning? If not, deploy additional Wi-Fi access points and Bluetooth beacons in these areas, and conduct surveys.
Step 3 – Increase Wi-Fi and Bluetooth density
We have Wi-Fi and Bluetooth coverage throughout the building, but the accuracy is not satisfactory. Please review the Wi-Fi and Bluetooth density in these areas and compare them with the tables here. From a theoretical and simulated perspective, determine if it is recommended to increase the density of Wi-Fi and Bluetooth to meet our requirements. If needed, deploy more Wi-Fi and Bluetooth beacons in these areas.
Step 4 – Increase Survey accuracy
You have Wi-Fi and Bluetooth in all the areas of the building and the density is according to the theoretical levels suggested under Step 3 to meet your requirements, BUT the accuracy is still not good enough. Perform more detailed surveys. Make sure you place reference points as often as possible (once per square meter is optimal) and as accurately as possible. It is important that you are precise and correct when placing the reference point on the map. It is a common mistake to place them in other places than where you really are located.