Average time determination package service in the network

Using the key parameters of the computer network efficiency as a complex system with the signal and control information delays, we can predict the state of the system and can solve the quality control problems of the service in real time. To estimate the average value of time of the service packet in the network was built a model of the behavior of the station in the form of Markov chain with discrete time. The unit of measurements of Markov chain is a virtual slot based on the adopted model. It should be consider 3 types of virtual slots: "empty", "successful" and "collision" slots. For these cases we have received basic probability formulas.