In this paper, we study the stability of a fluid queue with an
infinite-capacity buffer. The input and service rates are governed by a
stochastic process, called the environment process, and are allowed to depend
on the fluid
level in the buffer. The variability of the traffic is modeled by a
Brownian motion and a local variance function, which also
depends on the fluid level in the buffer.
The behavior of this second-order fluid flow model is described by
a reflected stochastic differential equation, and, under stationarity and
ergodicity assumptions on the environment process,
we obtain stability conditions for this general fluid queue.