Propagation delay: Propagation delay of an acoustic signal moving with velocity v between a sender i and receiver j separated by distance si,j is given by: (10)Dpi,j=si,jv The speed of acoustic signal v= 1500 ms−1 which is calculated using Equation (8). Sum of both type of delay constitutes to one hop delay. (11)Dni,j=Dtn+Dpi,j