Achieving Prescribed-Time Stabilization in Nonlinear TCP/AQM Systems With Input Saturation

• Published in: IEEE transactions on network science and engineering Vol. 11; no. 1; pp. 1363 - 1373
• Main Authors: Sadek, Belamfedel Alaoui, Badreddine, El Haiek, Noreddine, Chaibi, El Houssaine, Tissir
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.01.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active queue management (AQM); Actuators; Antiwindup compensators; congestion control; Convergence; Delays; input saturation; Internet; Network topologies; Network topology; Nonlinear dynamical systems; prescribed time; Queues; Stabilization; TCP/AQM system; Thermal stability; time delay; Time lag
• ISSN: 2327-4697; 2334-329X
• DOI: 10.1109/TNSE.2023.3322514

In this work, a prescribed finite time active queue management scheme for congestion control in IP networks is proposed to address the challenges of time delay and input saturation. A delay compensation-based predictor is utilized to eliminate input delay, and a novel nonlinear anti-windup compensator is constructed to handle input saturation. The proposed scheme is composed of two parts: the first one designs a predicted state-based active queue management scheme without considering saturation, and the second one develops a nonlinear anti-windup compensator to address saturation issues. The combination of these two results ensures prescribed finite-time stabilization even when the input is subject to saturation. The effectiveness of the proposed Prescribed Active Queue Management (PrAQM) scheme is demonstrated through simulations on a dumbbell network topology.