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The increase in the availability of multimode devices for ubiquitous network access and the need for larger bandwidth have created a thrust for the utilization of simultaneous network connections. Unfortunately, the standard transport layer protocols such as the transmission control protocol and user datagram protocol have structural constraints. As a result, an Internet application can use only one interface at a time. The stream control transmission protocol (SCTP) provides support for concurrent multipath transfer (SCTP-CMT). In this paper, we present the mathematical modeling of simultaneous multipath transmission (SMT) schemes using the deterministic time Markov chain (DTMC) model. In this DTMC model, receiver buffer size is used for the first time to estimate the sending data rate. The DTMC model of SMT schemes are compared with the SCTP-CMT using probability-based packet dropped scenarios. DTMC modeling is used to mathematically verify simulation results of SMT Schemes i.e., modified fast retransmit (SMT-MFR) and adaptive modified fast retransmit (SMT-AMFR). The analytical model results revealed that SMT-MFR outperformed SCTP-CMT by 8.54% gain in average throughput. SMT-AMFR outperformed the SCTP-CMT and SMT-MFR by 19.65% and 11.15% gain in average throughput, respectively.

Deterministic Time Markov Chain Modelling of Simultaneous Multipath Transmission Schemes