一种基于以太网的嵌入式数据传输速率优化方法研究  

Study of optimization method for an embedded data transmission system based on ethernet

作　　者：陈实[1] 武杰[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《微型机与应用》2015年第4期64-66,69,共4页Microcomputer & Its Applications

基　　金：国家重大科研装备研制项目"深部资源探测核心装备研发"(ZDYZ2012-1-05-03);国家科技重大专项"MEMS加速度传感器规模化制造技术与数字检波器集成"(2011ZX05008-005-61)

摘　　要：基于以太网的嵌入式数据传输系统在许多领域被普遍采用,系统的传输效率需要提高。基于ARM Cortex-M4内核和常用的嵌入式网络协议栈Lw IP,针对点对点数据传输的特点,采用了零数据拷贝技术并对UDP协议加以优化改进,大大提高了传输性能。测试结果表明,数据传输的速率从未优化的2.03 MB/s提升到9.80 MB/s,已接近百兆以太网的极限。同时引入ACK回应机制保障了UDP数据传输的可靠性。The data transmission systems based on the ethernet have been employed in many fields, however, the transmission efficiency need to be improved. This paper aims to improve the transmission efficiency and reliability of the data transmission of the net. It is based on the ARM and LwIP. Considering the characteristic of the zero data transmission, It adopts the zero data copy technology and optimizes the UDP protocol, which significantly enhances the transmission efficiency. The test results show that the data transmission rate increases from 2.1 Mb/s to 10 Mb/s, which nearly reaches the full transmission potential of the net. Moreover, it employs the ACK reaction mechanism to maintain the reliability of the data transmission.

关 键 词：STM32F407 Lw IP/UDP 零数据拷贝 ACK 

分 类 号：TL8[核科学技术—核技术及应用] TP274.2[自动化与计算机技术—检测技术与自动化装置]