Simulation and Experimental Evaluation of Multipath Congestion Control Strategies

In: Proceedings of the 2nd International Workshop on Protocols and Applications with Multi-Homing Support~(PAMS)
Buchaufsatz / Kapitel / Fach: Informatik
Zentrale wissenschaftliche Einrichtungen » Institut für Experimentelle Mathematik (IEM) Essen
The need for service resilience is leading to a steadily
growing number of multi-homed Internet sites. In consequence,
this results in a growing demand for utilising multiple Internet
accesses simultaneously, in order to improve application payload
throughput during normal operation. Multi-path Transport
Layer protocol extensions – like Multi-Path TCP (MPTCP) for
TCP and Concurrent Multipath Transfer for SCTP (CMT-SCTP)
– allow applications to make use of such network topologies.
However, since TCP – which constitutes the basis of most
Internet applications – and its congestion control procedures
have been designed under the assumption of single-homed sites,
fairness issues may arise by the usage of multipath transport.
These issues are addressed by advanced congestion control
approaches, which have already been examined by simulations.
However, real-life network measurements are missing. In this
paper, we perform an experimental proof-of-concept evaluation
of several multipath congestion control strategies, which are
currently under discussion within the IETF in the context of
MPTCP as well as CMT-SCTP. Particularly, we validate effects
that have been observed in simulations, in order to trigger further
discussions on multipath congestion control. Also, our goal is
to provide insight into the different approaches to support the
ongoing IETF standardisation activities on multipath transport