面向e-VLBI天文数据的高性能传输协议研究  

A Study on High Performance Network Transfer Protocols for e-VLBI Astronomy Data Transfer

作　　者：于艳锋[1,2] 任勇毛[1] 李俊[1] 陈中[3] 张岩[1] 

机构地区：[1]中国科学院计算机网络信息中心,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院上海天文台,上海200030

出　　处：《科研信息化技术与应用》2013年第2期18-26,共9页E-science Technology & Application

基　　金：中国科学院知识创新工程青年人才领域项目(CNIC_QN_1203);国家重点基础研究发展计划(973计划)(2012CB315803);国家高技术研究发展计划(863计划)(2011AA01A101)

摘　　要：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 an astronomic observation technique that could yield the highest resolution images. With the development of network communication and computer technology, thetransfer mode of VLB1 is gradually changing to a real-time transfer mode which is called e-VLBI, e-VLBI transfers VLBI data in a reliable, high-speed, and relatively fixed rate, which requires a high-efficiency transport protocol. In this paper, we depicted the background of e-VLBI, concluded some characteristics of e-VLBI transmission, and introduced SUDP （Simple UDP）, which is an e-VLBI data transport software suite with VDIF （VLBI Data Interchange Format） developed by Mamoru Sekido. And then, we proposed a new protocol named RSUDP （Reliable SUDP） based on SUDP, and described the mechanism and implementation of RSUDP in details. Experiment results verified that RSUDP could retransfer the missing data effectively, and has obvious advantage over SUDP in providing reliable transmission.

关 键 词：e-VLBI VLBI数据传输 网络传输协议 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]