Performance and fairness comparison of extensions to dynamic window coupling for Multipath TCP

With the onset of multiple wireless technologies, the end-host devices of today are multi-homed. This has led to research in the simultaneous use of multiple paths between the multi-homed end devices. New multipath transport protocols such as Multipath TCP and Concurrent Multipath Transfer SCTP need to be fair to the existing transport protocols like TCP and SCTP in a congested network. One way of being fair is to couple the congestion control mechanisms of the protocol over its multiple utilized paths. This paper illustrates and compares the solutions that have been proposed to ascertain that Multipath TCP can yield an improved performance while being fair to standard TCP. In addition, this paper highlights improvements to one of the proposed solution - Dynamic Window Coupling. It is shown that the new solution performs best in most of the different scenarios of bottlenecks in a network with a higher preference given to being friendlier to TCP.