一种差异化可靠传输控制机制  

A Differentiated Reliable Transmission Control Mechanism

作　　者：殷明 任勇毛[1,2] 张运栋 周旭 徐安民[3] 于德雷 YIN Ming;REN Yongmao;ZHANG Yundong;ZHOU Xu;XU Anmin;YU Delei(Computer Network Information Center,Chinese Academy of Sciences,Beijing 100083,China;University of Chinese Academy of Sciences,Beijing 100049,China;Huawei Technologies Co.,Ltd,Beijing 100085,China)

机构地区：[1]中国科学院计算机网络信息中心,北京100083 [2]中国科学院大学,北京100049 [3]华为技术有限公司,北京100085

出　　处：《数据与计算发展前沿》2022年第5期138-151,共14页Frontiers of Data & Computing

基　　金：北京市自然科学基金(4202082);中国科学院国际伙伴计划项目(No.241711KYSB20180002);华为合作项目(No.YBN2020065107)。

摘　　要：【目的】随着网络通信技术和应用的快速发展,互联网推动了大量新型应用的出现,这些应用的性能需求也越来越精细化和差异化。许多应用(比如实时流媒体应用)可以容忍一定程度的数据丢失。然而,传统的通用网络传输协议不提供灵活的可靠度保证服务。【方法】本文设计了一种新型的通用的差异化可靠传输控制协议(DRTP),旨在为上层应用程序提供差异化和确定性的可靠度保证,并且保证传输效率。【结果】本文重点介绍DRTP协议的重传控制机制,主要避免超时的触发,减少在当前传输可靠度满足应用可靠度需求时不必要的数据重传次数。本文在NS3上进行仿真实验,也在Linux内核上进行系统开发并测试,验证其传输效果。【结论】实验结果表明,在具备一定程度丢包率的网络链路上,相对于现有TCP协议,该机制不仅能保证应用可靠度需求,还能提供更好的传输吞吐率。[Objective]The internet has facilitated the introduction of a huge number of new applications due to the fast development of network communication technologies and applications.These applications’performance needs have gotten increasingly specific and differentiated.Many applications can tolerate a certain degree of data loss,such as real-time streaming media applications.However,traditional generic network transmission protocols do not provide flexible reliability assurance services.[Methods]This paper proposes a new generic Differentiated Reliable Transmission Control Protocol(DRTP),which aims to provide differentiated and deterministic reliability guarantees for upper-layer applications and ensure transmission efficiency.[Results]This paper focuses on the DRTP protocol’s retransmission mechanism,which mainly minimizes the triggering of timeout retransmission and decreases unnecessary data retransmission times when the existing transmission reliability fulfills the application reliability requirements.In this paper,the simulation experiment is conducted on NS-3,and the mechanism is developed and tested on the Linux kernel to validate its transmission impact in this work.[Conclusions]The results of the experiments reveal that,when compared with TCP,this approach may not only assure the application reliability requirements but also offer greater transmission throughput on a network link with a specific degree of packet loss rate.

关 键 词：传输协议 重传机制 差异化可靠传输 部分可靠传输 TCP 

分 类 号：TN915.04[电子电信—通信与信息系统]