Robust Stochastic Flow Management for TCP/AQM System
نویسندگان
چکیده
Abstract: This paper presents a delay-dependent robust stochastic active queue management (AQM) scheme that can be implemented in the routers for stabilizing queues in transmission control protocol (TCP) communication networks. The linearized TCP/AQM system is modelled as a uncertain time-delay system with stochastic perturbations and time-varying network parameters. In this paper, a new flow management scheme is designed analytically based on the H∞ theory. This proposed flow management scheme not only asymptotically stabilizes the queue size to the desired operating point, but also guarantees the robust stability of network against the variations in the round-trip time delay and minimize the effects of the external disturbance on the output.
منابع مشابه
Robust Congestion Control with Observer for TCP/AQM System using Loop-Shaping Method
This paper presents the LQ-Servo control with observer for TCP/AQM system. In order to estimate the state of TCP window packet size, the control structure is extended with observer based on Kalman filter.
متن کاملStochastic Fair Aggregate Rate Control: Practical Traffic Management for Efficient and Robust IP Networking
The robustness of the Internet today depends upon the end-to-end congestion control mechanisms of TCP. As use of non-TCP applications such as streaming media and network games grows, the potential for unfair network resource allocation and the threat of congestion collapse increase. The Internet needs a practical solution to protect well-behaving flows from misbehaving flows and avoid collapse....
متن کاملStability Analysis of Proportional-Integral AQM Controllers Supporting TCP Flows Análisis de Estabilidad de Controladores AQM Proporcional-Integral Suportando Flujos TCP
This paper focuses on the asymptotic stability of proportional-integral AQM controllers supporting TCP flows. Necessary and sufficient conditions for the asymptotic stability of the closed-loop linearization are provided. As a result, the complete set of proportional-integral controllers that locally stabilizes the equilibrium point is obtained. The robustness of the controllers to uncertaintie...
متن کاملPerformance analysis of TCP/AQM with generalized AIMD under intermediate buffer sizes
For TCP/AQM systems, the issue of buffer sizing has recently received much attention. The classical rule-of-thumb suggests O(N) buffer size to ensure full link utilization when N TCP flows share a bottleneck link of capacity O(N), while recent empirical study shows the buffer of size O( √ N) is enough to yield high utilization (say, 95%) for large N . However, these results are all limited to t...
متن کاملRobust Congestion Control based on Loop-Shaping Method with Kalman Filter for TCP/AQM System
This paper presents the LQ-Servo control with observer for TCP/AQM system considering an input time-delay. This controller structure is made by taking a traditional servo mechanism based on Linear Quadratic approach and by augmenting a new state variable to the feed forward loop. In order to estimate the state of TCP window packet size, the control structure is extended with observer based on K...
متن کامل