This paper examines port queuing system with single berth. For its imbedded Markov chain, the author gives a necessary and sufficient condition under which the system is ergodic.

• 港口系统排队模型由两个排队子系统构成。本文对单个泊位(服务台)的情形讨论了它的嵌入马氏链,给出了系统遍历的充分必要条件。