The typical use case where wall annotation can improve the location performance is where the location cells are close to each other, see picture below. Unfortunately, signal penetrates through the wall via reflected path which introduce positioning error. If highest accuracy is required only line of sight anchors should be taken for positioning, therefore middle wall annotation in this scenario tells location engine to use only for four anchors per each room with good line-of-sight visibility, not the eight anchors together. Generally, the higher number of anchors the better position accuracy is, nevertheless the good line of sight visibility is far more important.
Wall annotation menu:
For example we have localization in three rooms which are close to each other. Signal from tag in middle room can be also received with anchors I rooms next to. And this can affect calculation of position, and position can jump when tag is on one place. If user annotate walls in floorplan, algorithm will filter anchors behind wall from the calculation of position and final position will be more precise and stable.
Three rooms without walls annotation:
Three rooms with walls annotation: