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Study on the Reliable Data Transfer Based on RUDP

Author: HuGuang
Tutor: XiongQianXing
School: Wuhan University of Technology
Course: Applied Computer Technology
Keywords: RUDP UDP TCP SCTP Congestion Control
CLC: TN918.6
Type: Master's thesis
Year: 2006
Downloads: 182
Quote: 4
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Abstract

Currently generally use the Transmission Control Protocol TCP or SCTP to guarantee reliable data communication. These two protocols are not well adapted to the current requirements of network applications for efficient data transfer and bandwidth adaptation. SCTP is a stream-based transport protocol, a border agreement, If you want to apply it to the data communication on the boundaries and integrity of user processing the datagram, which will inevitably increase the overhead of the system and reduce the communication efficiency. AIMD algorithm in the TCP protocol to reduce the TCP congestion window, but you can not quickly restore the available bandwidth. TCP congestion control unfair RTT (round-trip time of the TCP packet) caused by concurrent TCP flows with different RTT unfair share of bandwidth. With the increase in the network bandwidth delay product (BDP), the RTT of the TCP algorithm seriously limits the efficiency of the computation of the TCP protocol in the WAN distributed. Another widely used transport layer protocol is UDP User Datagram Protocol. UDP is a message-based transport protocol, is mainly used to support network applications need to transfer data between computers. Their respective data transmission channels reserved for different applications by using the port number, the UDP protocol enables the support of multiple applications of the same moment at the same time to send and receive data. UDP protocol does not need to establish a transport protocol connection, has the advantages of high efficiency, speed and less resource-based messaging and real-time systems can significantly improve the efficiency of the system to transfer data. UDP does not safeguard the reliable delivery of data transport mechanism, can not meet the application to transfer data, the reliability requirements of the message. Support for the realization of high-performance data transfer, naturally think of the advantages of TCP and UDP, and add some guarantee reliable data transmission control mechanism to meet the needs of the application on top of UDP. The RUDP protocol framework It is in this context that. Author in the collection and analysis of a large number of data transmission at home and abroad in recent years literature, in-depth study of reliable data transmission technology, according to the RUDP protocol framework and WinSocket of technology, design the the RUDP communications software module, to achieve reliable distributed systems and efficient data communication. Thesis analyzes the reliable transmission transmission technology development, research direction, and the existing problems; RUDP protocol followed by in-depth study of the basic principles, highlights RUDP implementation mechanism, including a sliding window mechanism, timer management mechanism and rate control mechanism; the RUDP reliable data transmission system architecture, system design goals, given the logic of the system model to analyze the logic module structure, the logic module design; Finally, according to the thesis logical model, design and implementation the RUDP of reliable data transmission system, and detailed analysis of the key technologies used in the system implementation process, the actual comparison RUDP and TCP protocol communication efficiency. Provide a reference for business applications with high reliability requirements of data transmission.

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