Optimal performance of data transmission between Malaysia-China for VLBI-based radio astronomy observation using Jive5ab

摘要

A Very Long Baseline Interferometry (VLBI) station in Malaysia is significant to improve the coverage of the Asia-Oceania Network. This study investigates the transmission network performance between Malaysia and China through high bandwidth real-time data transfer using Malaysia Research and Education Network (MYREN) and China Science and Technology Network (CSTNET) for e-VLBI purposes. The transmission network tests and data transfer tests were conducted from two VLBI station locations: Universiti Malaya campus in Kuala Lumpur and the Biotechnology Research Centre in Jelebu, to the Shanghai Astronomical Observatory (SHAO) of the Chinese Academy of Sciences. This research investigates data transfers using several different protocols; the File transfer protocol (FTP), user datagram protocol (UDP), and UDP-based data transfer (UDT) using Jive5ab software. Based on the results, the University Malaya network demonstrated its capability with a maximum throughput of 800 Mbps and an acceptable packet loss of 0.049%. Also, the Jive5ab-UDT protocol has the best performance, with a maximum throughput of 302.56 Mbps and 467.43 Mbps for the download and upload speeds, respectively. The results also confirm University Malaya as a suitable site to perform data transfer using its high-speed connection to SHAO.