Research on the gateway in supervision system for intelligent equipments based on redundant work stations

To improve the reliability of traditional supervision system for intelligent equipments, a supervision system based on redundant work stations is proposed and then the gateway applied in this system is designed. According characteristic of intelligent equipment communication protocol, the multicast gateway has relatively high performance, which is confirmed by the efficiency comparison of UDP with TCP and the differences among unicasting, multicasting and broadcasting. Experiments results clearly indicate that the multicast gateway can increase packet transport speed and decrease computation of network bandwidth as well as the load on hosts with no interest in the application. The supervision system using this gateway can have improved reliability but has effect on whole performance with might and main.