Congestion degree estimation method using propagation loss of wireless communication, estimation device and estimation program

An estimation method of estimating a congestion degree of blocking entities in a communication region between a transmitter and a receiver performing radio communication, the estimation method comprising:

• acquiring received power;
• calculating propagation losses between the transmitter and the receiver, based on the received power acquired in the acquiring of the received power;
• calculating a median of a plurality of the propagation losses calculated in the calculating of the propagation losses in a predetermined time period determined in advance, and outputting the median as propagation losses to be used for subsequent processing;
• acquiring a loss peak by acquiring a maximum value of the propagation losses output in the calculating of the median;
• calculating a distance between the transmitter or the receiver and the blocking entities, at least based on the maximum value of the propagation losses acquired in the acquiring of the loss peak, heights of antennas of the transmitter and the receiver, and a wavelength of the radio communication;
• and
• calculating the congestion degree by estimating the congestion degree by calculating the number of the blocking entities in chronological order, based on the distance calculated in the calculating of the distance, integrating the number for a predetermined time period determined in advance, and thereby calculating the number of the blocking entities per unit area.