MPTCP combining congestion window adaptation and packet scheduling for multi-homed device

Abstract

Evolution of use of wireless technologies in laptops and mobile terminals, which are equipped with several network interfaces, has provided users to take advantage from multihoming to access network services anywhere, at any time and from any network. Advantage with multihomed host is that some of the traffic from more congested paths can be shifted to less congested path, thus controls congestion. In this paper we consider about Multipath TCP (MPTCP), which suffers from the degradation of goodput in the presence of changing network conditions on the available subflows due to out-of-order received packets. Cause of degradation is the large variation of end-to-end delay for multiple paths over wireless channels. To diminish the variation of end-to-end path delay, the proposed scheme uses congestion window adaption (CWA) algorithm to employ MPTCP source. Also to reduce the time of packet reordering at the receiver, a scheduling algorithm is employed for the MPTCP sender.

MPCC

“…for MPTCP, and many others, MPTCP often exhibits bad performance. This is not surprising; the leading MPTCP variants [38,51] are all extensions of a three-decades old congestion control scheme, namely, single-path TCP Reno, and consequently, inherit TCP's well-documented performance issues, including inability to adapt gracefully to changing network conditions, bad reaction to noncongestion loss, bufferbloat, RTT unfairness, and more [7,13,15].…”