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VLBI(Very Long Baseline Interferometry)是目前空间分辨率最高的天文观测技术。近年来随着网络通信和计算机技术的进步,其传输模式也逐渐的向实时网络传输的e-VLBI方向发展。e-VLBI要求稳定、高速、可靠的传输速率,需要有高性能的网络传输协议。首先介绍了e-VLBI数据传输的研究背景及国内外研究现状,并对其数据传输的特点进行了总结,然后介绍了现有的一种针对e-VLBI中VDIF(VLBI Data Interchange Format)格式数据传输的网络传输协议SUDP(Simple UDP),在此基础上,提出了一种基于SUDP的改进协议RSUDP(Reliable SUDP),实验结果显示RSUDP在保证高速的传输速率的同时,比SUDP具有更好的可靠性。
VLBI (Very Long Baseline Interferometry) is the highest spatial resolution of astronomical observation technology. In recent years, with the advancement of network communication and computer technology, its transmission mode has been gradually evolved to e-VLBI in real-time network transmission. e-VLBI requires stable, high-speed, reliable transfer rates and requires high-performance network transport protocols. Firstly, the research background of e-VLBI data transmission and the research status at home and abroad are introduced. The characteristics of data transmission are summarized. Then, an existing data format of VLI Data Interchange Format (VDIF) Based on this, we propose a Reliable SUDP (RSUDP) based on SUDP. The experimental results show that RSUDP has better performance than SUDP while guaranteeing high-speed transmission rate reliability.