Study of buffer subsystem of WATM

A novel method based on probability generating function (pgf) was presented for analyzing buffer subsystem of WATM.A set of closed-form results were derived by using this method for the expectation of the buffer contents and packet delay of WATM systems. It is very clear and useful for analysis of the characteristics of buffer subsystems of WATM systems. Since this method is independent of states of the arrival process, it can be used for the buffer subsystems of WATM,and the more general systems with buffers. The simulation results show that this method is very effective and powerful.