UDP Protocol Realize Point-to-point High-speed Reliable Transmission Model

How to transfer data more efficiently is one of the highlights in agro-scientific research in the current computer network transmission protocol, including the transmission reliability, efficiency, equity and so on. TCP/IP protocol is based on the connection, its reliability and efficiency have reached the requirements of the general web applications, so the TCP/IP protocol has become the most widely used protocol in network application. But TCP/IP transmission speed for the connection of the UDP protocol is high, so the research has become an Internet based on UDP transport protocol research one of the important direction. UDP’s main characteristic is high-speed, out-of-order, packet loss more, for the connection and low system overhead, according to these characteristics and analyzed after GUDP protocol is proposed in this paper, mainly in the primary of the UDP protocol the following improvements:First, this article analyzed the characteristics of UDP protocol out-of-order, out-of-order restructuring mechanism, at the receiving end in establishing a receive buffer that will receive the out-of-order packets refactored to a layer, solved the problem of the UDP transport order. Second, timeout retransmission mechanism, and RUDP Reliable user datagram protocol (Reliable UDP) different is not the retransmission of fixed length request, instead of using variable length request, according to the transmission network status of both sides, the dynamic adjustment time, more effectively improve the accuracy of the retransmission, reduce error retransmission probabilities, to ensure the reliability of transmission and improve the efficiency. Third, establish is similar to TCP’s sliding window, dynamically adjust the window size to adapt to the changes in network conditions, play on network congestion control, implement a confirmed multiple sets of data, improve the transmission efficiency. Fourth, implement subnet through, let both sides in different subnet can implement data transmission without going through a third party to transfer data, improve the security of data transmission. Fifth, the GUDP, RUDP and TCP test in a single network, analysis of their reliability, efficiency and fairness, that GUDP has higher transmission efficiency.