DB-CMT: A New Concurrent Multi-path Stream Control Transport Protocol

Abstract Stream Control Transmission Protocol (SCTP) exploits multiple network interfaces to provide multi-streaming and data chunk ordering in a stream. An extended feature of SCTP, i.e., Concurrent Multi-path Transfer (CMT), bids concurrent transmission multi-path transfer environment guarantees bandwidth aggregation, load sharing, robustness, reliability. In such an environment, the paths usually have distinct characteristics (i.e., delay, Packet Loss Rate (PLR), bandwidth). Thus, chunks are received out-of-ordered at destination. As result, CMT causes excessive receiver buffer blocking unnecessary congestion window ( cwnd ) reductions. Also, during selection retransmission destination path (to resend lost chunk), does not take into account vital Quality Service (QoS) parameters as PLR under consideration. This paper introduces new Delay-Based (DB-CMT) approach that transmits on according their delay. this scheme, we present Data Scheduling Policy (DB-DSP), Retransmission Path Selection (RTX-CL), Fast (DB-FRP). The simulation results show DB-CMT’s RTX-CL policy performs better than well-known RTX-CWND RTX-LOSSRATE schemes. overall performance DB-CMT witnesses improved throughput, fewer timeouts, reduced File Time (FTT) performances.