Ten-rays model
The ten-rays model is a mathematical model applied to the transmissions of radio signal in an urban area, to generate a model of ten rays typically four rays more are added to the six rays model, these are ( R 3 {\displaystyle R3} and R 4 {\displaystyle R4} bouncing on both sides of the wall); This incorporate paths from one to three reflections: specifically, there is the LOS (Line of sight), GR (ground reflected), SW (single-wall reflected), DW (double-wall reflected), TW (triple-wall reflected), WG (wall-ground reflected) and GW (ground-wall reflected paths). Where each one of the paths bounces on both sides of the wall.