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Internet robot control system is a typical real-time network control system (NCS). The data stream of the NCS is comprised of crucial data and real-time data. The crucial data demands more reliability for the network protocol, which requires low error rate, low loss rate and high throughput. And the real-time data has more delay sensitivity, requiring minimal delay and delay jitter. However, the request of these two types of data is contrary. Now existing protocol, such as TCP or UDP, can cater for only one type of data. This paper presents a new transport layer protocol. The protocol can reconfigure itself to cater for both of crucial and real-time request.