What are the threshold values for nLOS and NLOS?

Excess Path Loss, dB

LOS, nLOS, or NLOS?

0

Line of Sight (LOS)

≤ 10

near LOS (nLOS)

> 10

Non LOS (NLOS)

The terms nLOS and NLOS are really only nominal names to give a rough indication about how obstructed the path is.

Generally a path with less than 6 dB loss is only incurring obstruction into the Fresnel zone and there would still be visual line of sight to the other end.

Between 6 and 10 dB depending on the shape of the obstruction this may also only be Fresnel zone obstruction or just start to obscure the direct line of sight path.

Above 10 dB the line of sight path is definitely obscured.

LINKPlanner doesn’t do anything specific when it reaches these break points—the algorithms are continuous and simply increase the loss on the path.

The amount of Excess Path Loss is also used as a factor in the tolerance value, so paths with high excess path loss will have a larger tolerance than LOS paths. 

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