Abstract:

SCTP is a general-purpose Transport Layer protocol with out-of-the-box support for multi-streaming as well as multi- homing. A protocol extension, which is denoted as CMT- SCTP, extends SCTP by supporting Concurrent Multipath Transfer (CMT). That is, multiple network paths are uti- lized simultaneously in order to improve the payload data throughput. However, dissimilar paths { i.e. paths having dierent delays or bandwidths { are challenging and also very likely in internet setups. In this paper, we show how CMT-SCTP data transport per- formance can be improved by combining multi-streaming with an advanced stream scheduling policy and SCTP API enhancements. The performance benet of our approach in dissimilar path setups is proven by simulations.1