L4-DMF: An Enhanced Self Adaptive Congestion Control Mechanism in Layer-4, a Simulation Validation
Ochi Josiah · 2014
As part of an ongoing research, this work presents an enhanced self adaptive congestion control mechanism in layer-4, called Dynamic Modulation Feedback (DMF) which can fit into the network condition dynamically according to the parameters given by upper layer and the network layers These layers comprise of buffer windows, data rates, Average Queuing Length (AVQL), channel conditions or Packet Error Rate-PER. In this work, an optimization model for throughput maximization in Flow Aware-Wireless Local Area Network (FA- WLAN) was developed. A simulation was carried out with OPNET IT Guru to compare the congestion control mechanism of TCP- Tahoe, Reno, New Reno, Vegas and Sack (TCP-TRONVS) with a proposed layer-4 TCP-DMF. Performance metrics such as Latency, Throughput, Buffer Utilization, and Packet Loss Ratio, was used in the analysis while the measurement results from OPNET Modeler 9.1 was analysed. Consequently, this work showed that with the proposed layer-4 DMF congestion control mechanism, FA-WLANs will scale gracefully in this new era of High Performance Computing (HPC).