We consider a realistic model of wireless network where nodes are di\ spatched in an infinite map with uniform distribution. Signal decays with distance according to attenuation factor $\alpha$. At any time we assume that the distribution of emitters is $\lambda$ per square unit area. From the explicit formula of the laplace transform of received signal we derive the explicit formula for the info\ rmation rate received by a random node which is $\frac{\alpha}{2}(\log 2)^{-1}$ per Hertz. We generalize to any-dimension network maps.