A real time router fault accommodation

In this paper, a fault tolerance theory for queue based congestion control is proposed in the behavioral system theoretical framework. The router dynamics changes instantaneously when the fault occurs causing the undesirable instability in the queue length. To improve the dynamics of TCP/AQM networks, suitable controllers (stable and optimal) are synthesized using the concept of canonical controller in real time. This makes the network to maintain its stability. The main feature of this fault accommodation technique is that it solely relies on the input-output trajectories generated by the actual plant model (without having its exact knowledge) and on the performance specifications given by the desired behavior. The least restrictive controller satisfying the desired behavior is chosen based upon the generated trajectories.

[1]  Michael G. Safonov,et al.  The unfalsified control concept and learning , 1997 .

[2]  C.M. Kellett,et al.  Sizing Internet Router Buffers, Active Queue Management, and the Lur'e Problem , 2006, Proceedings of the 45th IEEE Conference on Decision and Control.

[3]  Harry L. Trentelman,et al.  The canonical controllers and regular interconnection , 2005, Syst. Control. Lett..

[4]  J. Willems.  On interconnections, control, and feedback , 1997, IEEE Trans. Autom. Control..

[5]  Dominique Sauter,et al.  A real-time model-free reconfiguration mechanism for fault-tolerance: Application to a hydraulic process , 2008, 2008 10th International Conference on Control, Automation, Robotics and Vision.

[6]  Cédric Join,et al.  MULTI-RED CONTROLLER FOR ROUTER FAULT ACCOMMODATION , 2006 .

[7]  Michel Kinnaert,et al.  Performance-based switching for fault tolerant control , 2003 .

[8]  Ari Ingimundarson,et al.  Using the Unfalsified Control Concept to achieve Fault Tolerance , 2008 .

[9]  Arjan van der Schaft,et al.  Achievable behavior of general systems , 2003, Syst. Control. Lett..

[10]  JinJiang.  Fault-tolerant Control Systems--An Introductory Overview , 2005 .

[11]  Didier Theilliol,et al.  Fault-tolerant control in dynamic systems: application to a winding machine , 2000 .

[12]  Donald F. Towsley,et al.  Analysis and design of controllers for AQM routers supporting TCP flows , 2002, IEEE Trans. Autom. Control..

[13]  Chuang Lin,et al.  A nonlinear control theoretic analysis to TCP-RED system , 2005, Comput. Networks.

[14]  Dominique Sauter,et al.  A model based 2-DOF fault tolerant control strategy , 2010, 18th Mediterranean Conference on Control and Automation, MED'10.

[15]  Cédric Join,et al.  An introduction to nonlinear fault diagnosis with an application to a congested internet router , 2004 .

[16]  Youmin Zhang,et al.  Actuator Fault Tolerant Control Design Based on a Reconfigurable Reference Input , 2008, Int. J. Appl. Math. Comput. Sci..

[17]  Donald F. Towsley,et al.  A control theoretic analysis of RED , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).