Communication Multiplexing of Server with QUIC and SDN in Multihomed Networks

When mobile devices equipped with multiple wireless network interfaces access the Internet through Wi-Fi, 4G, and 5G, external factors such as radio waves can lead to an increased packet loss rate, resulting in a slowdown in communication speed. To address this issue, two solutions exist: BBR, a congestion control algorithm designed to reduce the impact of packet loss and bicast in multihomed networks. Bicast in multihomed networks leverages multiple networks for communication, allowing simultaneous transmission of the same packet across multiple networks to reduce packet loss rates and prevent communication speed reduction. This paper introduces a novel network architecture that uses QUIC and SDN, both of which can be implemented in the userland. This network architecture enables the realization of a multihomed network independent of the operating system, and the congestion control algorithm can be easily configured. Additionally, because QUIC lacks bicast capabilities for multihomed networks, this deficiency is addressed through SDN implementation. By using the proposed multihomed network, we measure communication speeds for unicast and bicast packets from the server when varying the packet loss rate. The results indicate that the communication speed could be maintained even with a 15% packet loss rate for unicast communication and 32% for bicast communication.