基于超时重传和多重校验的UDP可靠通信设计

UDP Reliable Communication Based on Timeout Retransmission and Multiple Verifications

中文关键词:  超时重传  多重校验  UDP  可靠通信  实时操作系统

英文关键词:timeout retransmission  multiple verification  UDP  reliable communication  real-time operating system

中文摘要:

      UDP是一种开销小、效率高的以太网传输层协议，由于其非面向连接的固有特性，在工程应用中会发生丢帧、错帧和乱帧等问题。针对UDP通信不可靠问题开展研究，在保证其开销小、效率高等优势的前提下，设计了基于四度冗余拓扑的以太网总线结构，实现了基于多重校验的以太网通信协议，提出了两种基于超时重传的UDP可靠通信方法。经建模分析，该方案相较传统单通道UDP通信，可靠度由0.9提升到0.9999。经试验测试，基于该方案的嵌入式软件可以在通信链路出现一度、二度和三度故障时，实时、可靠地完成UDP数据通信，为UDP通信提供了新的高可靠性工程应用方法。

英文摘要:

      UDP is an Ethernet transport layer protocol with low overhead and high efficiency.Due to its inherent non-connection oriented characteristics,it will cause frame loss,frame error and frame disorder in engineering applications.In order to solve the unreliable problem of UDP communication,on the premise of ensuring its advantages of low overhead and high efficiency,an Ethernet structure based on four degree redundancy topology is designed,an Ethernet communication protocol based on multiple verification is realized,and two UDP reliable communication methods based on timeout retransmission are proposed.Through modeling and analysis,compared with the traditional single channel UDP communication,the reliability of this scheme is improved from 0.9 to 0.9999.The test shows that the embedded software based on this scheme can complete UDP data communication in real time and reliably in case of one-time,second-degree and third-degree failures of communication link,which provides a new high reliable engineering application method for UDP communication.