Yan, P.Gao, Y.Özbay, Hitay2016-02-082016-02-0820031530-1346http://hdl.handle.net/11693/27498Date of Conference: 30 June-3 July 2003Conference Name: 8th IEEE Symposium on Computers and Communications, ISCC 2003It has been shown that the TCP connections through the congested routers can be modeled as a feedback dynamic system. In this paper, we design a variable structure (VS) based control scheme in active queue management (AQM) supporting explicit congestion notification (ECN). By analyzing the robustness and performance of the control scheme for nonlinear TCP/AQM model, we show that the proposed design has good performance and robustness with respect to the uncertainties of the round-trip time (RTT) and the number of active TCP sessions, which are central to the notion of AQM. Implementation issues are discussed and ns simulations are provided to validate the design and compare its performance to other peer schemes' in different scenarios. The results show that the proposed design significantly outperforms the peer AQM schemes in terms of packet loss ratio, throughput and buffer fluctuation.EnglishActive queue managementControl schemesExplicit congestion notificationPacket loss ratioRound-trip-timeTCP connectionsTcp-sessionsVariable structuresCommunicationDesignRobustness (control systems)Transmission control protocolUncertainty analysisQueueing networksConference Paper10.1109/ISCC.2003.1214247