Sub-Path Congestion Control in CMT

Using the application of block data transfer, we investigate the performance of concurrent multipath transfer using SCTP multihoming (CMT) with congestion control policy under the scenario of a sender is constrained by the receive buffer (rbuf). We find that existing policy has some defects in aspect of bandwidth-aware source scheduling. Based on this, Based on this We proposed a sub-path congestion-control policy for SCTP (SPCC-SCTP) with bandwidth-aware source scheduling by dividing an association into sub paths based on shared bottleneck detection to overcome existing flaws of standard SCTP in supporting the multi-homing feature in the case of concurrent multipath transfer (CMT). The performance of the SPCC-SCTP is assessed through ns-2 experiments in a simplified Diff-Serv network. Simulation results demonstrated the effectiveness of our proposed mechanism and invite further research.