Semi-coupled Congestion Control for Multi-site Parallel Downloading

Multi-site Parallel Downloading is a technique that uses multiple low-cost edge nodes in the Internet to transfer short video content. Traditional multi-path congestion control fails to achieve fast convergence and high bandwidth utilization in MPD scenarios due to the over-coupling of subflows. In this paper, we propose a semi-coupled congestion control design for the MPD scenario by reallocating traffic between independent subflows. In simulation experiments, our design outperforms baseline models of traditional MPTCP.