Line-of-Sight
ProMan distinguishes five line-of sight (LOS) conditions:
- Line-of-sight (LOS) condition
- Direct line of sight between transmitter and receiver. The transmitter can see the receiver and inversely.
- Obstructed-line-of-sight (OLOS) condition
- Transmitter and receiver can be connected without wall intersection, for example, the transmitter and the receiver are in the same corridor but without having direct line of sight (exists only in indoor scenarios).
- Non-line-of-sight (NLOS) condition
- No direct line of sight between transmitter and receiver. The transmitter can not see the receiver and inversely due to shadowing by an obstacle (for example, a building).
- Line-of-sight for buildings but shadowing caused by vegetation objects (LOS-V) condition
- Line of sight between transmitter and receiver regarding the buildings, but shadowing due to the vegetation objects.
- Non-line-of-sight for buildings and shadowing caused by vegetation objects (NLOS-V) condition
- No line of sight between transmitter and receiver regarding the buildings and additional shadowing due to the vegetation objects.
Figure 1. Example of LOS status.