CCMF: A Congestion Control Method with Fairness for Multipath Transport

Multipath transport can simultaneously utilize many interfaces of a terminal to maximize the transfer throughput. However, when sharing the same bottleneck link with single-path flows, the multipath flows will occupy more network bandwidth and it will lead to the unfairness of resource allocation. In this paper, we propose a Congestion Control method with Fairness (CCMF) for multipath transport. CCMF transfers the traffic among different paths and considers the bandwidth fairness when multipath flows share the same bottleneck with single-path flows. We introduce a parameter of F-factor to reflect the degree and variation trend of fairness. Thus, CCMF can regulate the sending rate according to the fairness factor F-factor and achieve end-to-end fairness transmission. The simulation results show that CCMF can improve the fairness degree compared with Coupled Algorithm.