Server Migration with Multipath-QUIC

With the development of IoT and 5G technologies, edge computing is expected to be utilized and HTTP is one of the core network technologies. A new application protocol called HTTP/3, which uses QUIC (Quick UDP Internet Connections) as its transport protocol, was introduced in 2022. QUIC has a connection migration function that allows communication to continue even if the client’s IP or port number changes, but it does not consider changes in the server’s IP or port number. In this study, we focus on Multipath-QUIC, which is a multipath extension of QUIC, and propose a method of server migration that maintains connection information while significantly reducing packet loss and service impact time. In our experiments, we compared the proposed method with QUIC, which requires another download during migration, assuming an environment in which a server migrates in the middle of a download from a server hosting file. Experimental results showed that the proposed method outperforms QUIC by continuing communication on one path until the server is migrated, and resuming communication on the other path after detecting the completion of the migration of the destination server. The results of this research can contribute to the development of communication in diversified edge computing environments, because communication is performed even in environments where mobility requirements are imposed on servers.