Performance comparison of JTCP over QoS-aware WiMAX networks

TCP is the main transport-layer communication protocol in traditional wired networks. This is also due to its efficient behavior in presence of congestion events. However, networks with wireless links and mobile hosts provide significant non-congestive losses due to bit error rate, host motion and handover mechanisms. TCP incorrectly interprets these events as a sign of network congestion, throttling its transmission rate and causing degradation of end-to-end performance. In order to enhance TCP performance on wireless networks, several algorithms have been introduced to correctly deduce whether a loss occurs for a real congestion event. This paper carries out a performance evaluation of an innovative algorithm, called Jitter-based TCP (JTCP), over WiMAX networks. Realistic IEEE 802.16e MAC and PHY layers are adopted for performing simulations, showing that JTCP outperforms other TCP versions over WiMAX networks.