天地一体化信息网络高速传输协议设计与若干关键技术研究

doi:10.11959/j.issn.2096-8930.2021047

摘要/Abstract

摘要：

为了解决天地一体化信息网络中高丢包率、高误码率、大延时等问题，通过对可靠UDP、SCPS-TP等协议的研究，设计并实现适用于天地一体化信息网络的高速传输协议（SRTP）。SRTP重新设计了ACK和NAK相结合的确认机制、数据包重传机制，并利用人工免疫算法（IA）优化基于PID的拥塞控制机制。对比试验表明，SRTP与传统TCP相比，在传输速率、网络稳定性等方面均有良好的效果。

关键词: 天地一体化信息网络, 数据传输, PID控制, 网络拥塞, 人工免疫算法

Abstract:

In order to solve the problems of high packet loss rate, high bit error rate and long delay in space-integrated-ground information network, a transmission protocol (SRTP), which was based on UDP and SCPS-TP was designed.In SRTP, ACK and NAK acknowledgement mechanism, packet retransmission mechanism were redesigned, and PID congestion control mechanism was optimized based on artifi cial immune network algorithm(IA).Compared with traditional TCP, SRTP has better eff ect on transmission rate and network stability.

Key words: space-integrated-ground information network, data transmission, PID control, network congestion, artifi cial immune algorithm

中图分类号:

TN939

班亚明, 郑浩, 刘喆, 董思洋. 天地一体化信息网络高速传输协议设计与若干关键技术研究[J]. 天地一体化信息网络, 2021, 2(4): 84-92.

Yaming Ban, Hao Zheng, Zhe Liu, Siyang Dong. Research on Key Technologies and Design of High-peed Transmission Protocol in Space-Integrated-Ground Information Network[J]. Space-Integrated-Ground Information Networks, 2021, 2(4): 84-92.

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内容	含义
数据类型	可选内容包括：文件信息包、指令信息包、普通数据块、文件数据结束包和通道检测包等
网络分片序号	是该数据包在缓存分片中的顺序与缓存分片长度的内积，表明该数据包在缓存分片中的顺序信息
缓存分片序号	是该缓存分片在文件中的顺序与文件长度的内积，表明该数据包在文件中的顺序信息
容错	可选类型包括：首次连接失败、最新收到报文序号、无断开连接信息等
数据大小	数据总大小的哈希值，用于校验数据的完整性
数据块	指普通数据内容，根据经验SRTP每个包总长度初始值可设为975字节，因此每个包最大可携带数据大小为965字节

类型	C₁取值	C₂取值	C₃取值
TDMA	21.3	0.7	0.76
FDMA	29	0.8	0.83

文件大小	文件传输系统（不含业务逻辑）	文件传输系统（含业务逻辑）	FTP	测试环境
1.61 MB	耗时37.5 s；速度351.70 kbit/s	耗时47 s；速度280.61 kbit/s	耗时42 s；速度314.03 kbit/s	TDMA终端512 kbit/s带宽
3.02 MB	耗时60 s；速度412.33 kbit/s	耗时85 s；速度291.05 kbit/s	耗时68 s；速度363.82 kbit/s	TDMA终端512 kbit/s带宽
6.96 MB	耗时36 s；速度1 583.78 kbit/s	耗时45 s；速度1 267.02 kbit/s	耗时43 s；速度1 325.96 kbit/s	TDMA终端2 048 kbit/s带宽
97.38 MB	耗时498 s；速度1 599.50 kbit/s	耗时651 s；速度1 225.40 kbit/s	耗时601 s；速度1 327.08 kbit/s	TDMA终端2 048 kbit/s带宽