Design And Implementation Of Reliable Transmission Protocol For Monitor And Control System Based On UDP

Today is the era of information, all kinds of information spread through the network, when it comes to network communication, it is thought that all kinds of network protocols, transport layer protocol plays an important role in many network protocols, different application scenarios will use different transmission protocols to transmit information. The core of real-time monitor and control system is to receive and transmit the monitor and control data, with a large amount of communication data, the characteristics of high reliability, real-time communications. Transport layer protocol is mainly TCP and UDP. TCP protocol is a reliable transport layer protocol, it implements the flow control and congestion control mechanisms, these mechanisms are more complex, and also makes its transmission rate relative to UDP protocol is not high. UDP protocol has the advantages of simple implementation, high transmission efficiency, low occupancy of resources, but its biggest problem is that the reliability of transmission is not guaranteed. To achieve real-time monitor and control system, using UDP protocol can guarantee its real-time, if tailored to the specific needs of monitor and control system based on UDP protocol, with reliable transmission mechanism of packet loss and data error, it can satisfy the requirements of the reliability of the monitoring system. So the reliable transmission protocol of the monitor and control system based on the UDP protocol can meet the requirements of real-time monitor and control system for transmission efficiency and reliability.This paper mainly introduces the design and implementation of reliable transmission protocol for the monitor and control system based on UDP. First of all, the theory and technology reliable transport protocol were analyzed and summarized, and we mainly focuses on the analysis of the RUDP. Process of research and analysis of existing protocols lays a basis for the design and implementation reliable transmission protocol in monitor and control system. Then, based on the analysis of the monitor and control system, the overall design thought of UDP based reliable transmission protocol is put forward, acknowledgment, retransmission and verification mechanism is added to the UDP protocol. After that, using Java language, following the high cohesion and low coupling software design thought, the design pattern of the factory method, the observer and the single case completed the protocol. Finally, we test the reliable transmission protocol. From the results of functional and performance tests we can see that the protocol can meet the requirements of the monitor and control system, and it can meet the requirements of the reliable transmission and real-time performance.Overall, this paper has completed the design and implementation of reliable transmission protocol for the monitor and control system based on UDP, which has a complete function, good real-time performance, and achieved the expected requirements.