Abstract: Multimedia fiber optic industrial network (FIN) based on fast ethernet includes several types of data, such as alert data, control data and multimedia video signals, and each station of the industrial network must meet the demand of real-time transferring. This paper offers a hybrid mode transfer scheme based on the network application layer. According to the non-preemptive M/M/1 queuing model, waiting-time and system task number are used as parameters. A multi-task queuing model with the priority mode in the industrial network is established. The transferring mechanism and realizing method of priority transfer protocol (PTP) are founded and discussed. Lastly, the performance parameters and running results of the hybrid model are analyzed in different environments.

Key words: queuing system, network, industrial control and monitor system, real-time data transfer