A two-queue Markovian polling system with two priority levels in the   first queue
  In this paper, we deal with a two-queue polling system attended by a single server. The server visits the queues according to a Markovian routing mechnism. There are two-class customers in the first queue. Customers of each queue are served in the exhaustive discipline. For this model, we study the joint number of customers, the cycle time and the waiting times. we are also devoted to deriving the exact asymptotics for the scaled delay in the heavy-traffic scenario. In addition, the scaled delays with large switch-over times are discussed for the first time in the Markovian polling systems. Finally, we provide some simulations to surpport the asymptotic results. 
Yuqing Chu, Zaiming Liu, Jinbiao Wu
math.PR