MPP: Multipath Transport Paradigm in User-space

The adoption of the multi path transport protocol in the wide-area network is restricted due to the obstruction of middleboxes and its insufficient flexibility in application-level sup-port. Proposed improvements are hampered by the tight coupling of multipath and transport functionality within these protocols. In this poster, we present MPP, a multipath transport paradigm that reconstructs the multipath transport protocol in user-space. To be compatible with the current network infrastructure, MPP leverages existing transport protocols (TCP, UDP, and QUIC) for multi path transmission. Multipathing functions in the multipath transport protocol are separated into distinct modules, and MPP offers APIs for developers to customize these modules with scenario-oriented multipath scheduling algorithms. Evaluation results show that our MPP prototype performs similarly to traditional multipath transport protocols in regular scenarios and outperforms them in real-time video streaming when using the customized scheduler we developed with MPP APIs.