We view a $\bullet/M/K$ node having $K$ exponential servers of service rate $\mu$ as a map on the space of stationary ergodic arrival processes of rate $\lambda, \lambda < K\mu$. It is well known that the Poisson process of rate $\lambda$ is a fixed point of this map. We prove there is no other fixed point.
@article{1177005512,
author = {Anantharam, V.},
title = {Uniqueness of Stationary Ergodic Fixed Point for $A \cdot / M/ K Node$},
journal = {Ann. Appl. Probab.},
volume = {3},
number = {4},
year = {1993},
pages = { 154-172},
language = {en},
url = {http://dml.mathdoc.fr/item/1177005512}
}
Anantharam, V. Uniqueness of Stationary Ergodic Fixed Point for $A \cdot / M/ K Node$. Ann. Appl. Probab., Tome 3 (1993) no. 4, pp. 154-172. http://gdmltest.u-ga.fr/item/1177005512/