Parisian ruin of Brownian motion risk model over an infinite-time horizon

Let $B(t),t\in \mathbb{R}$ be a standard Brownian motion. In this paper, we derive the exact asymptotics of the probability of Parisian ruin on infinite time horizon for the following risk process \begin{align}\label{Rudef} R_u^{\delta}(t)=e^{\delta t}\left(u+c\int^{t}{0}e^{-\delta v}d v-\sigma\int{0}^{t}e^{-\delta v}d B(v)\right),\quad t\geq0, \end{align} where $u\ge 0$ is the initial reserve, $\delta \ge 0$ is the force of interest, $c>0$ is the rate of premium and $\sigma >0$ is a volatility factor. Further, we show the asymptotics of the Parisian ruin time of this risk process.