D-MPQUIC: Optimizing Loss Detection in High RTT Variation Networks

Abstract

With the development of the Internet, the number of users on mobile devices is increasing. However, mobile networks have a poor performance because of high round-trip time (RTT) variations. Much research has been conducted to overcome this, including active research on transport layer protocols. Google proposed a new transport protocol called QUIC and demonstrated that QUIC outperforms TCP in the real world. Furthermore, research on the multipath extension of QUIC (MPQUIC) is also being actively conducted. However, MPQUIC has poor performance in networks with high RTT variations caused by the weakness of the loss detection algorithm. In this paper, we improved the performance of MPQUIC by modifying MPQUIC’s time-based loss detection algorithm. We confirmed that the download completion time decreased by 55.5% compared with the original MPQUIC.