MultipathTester: Comparing MPTCP and MPQUIC in Mobile Environments

With the adoption of Multipath TCP by Apple for its iPhones, there is a growing interest in using multipath transport to seamlessly support different network interfaces on mobile devices. In parallel, the IETF is actively developing the QUIC protocol which could replace TCP for some types of applications and multipath extensions for QUIC have already been proposed. We design and implement MultipathTester, an iOS application that enables researchers to compare the performance of different multipath protocols on popular smartphones. Specifically, our application compares the performance of iOS Multipath TCP with Multipath QUIC with various traffic types and conditions.