Title :
Self-tuning multiloop PI rate controller for an MIMO AQM router with interval gain margin assignment
Author :
Hong, Yang ; Yang, Oliver W W
Author_Institution :
Ottawa Univ., Ont., Canada
Abstract :
We design a self-tuning multiloop PI (proportional-integral) rate controller for the MIMO (multiple-input multiple-output) AQM (active queue management) router to support best-effort service traffic in the Internet. Unlike the manual trial and error approach, our controller design employs the DNA (direct Nyquist array) method by shaping Gershgorin band analytically, thus allowing users to achieve the good stability robustness of the MIMO AQM control system through assigning proper gain margin interval. The self-tuning multiloop PI rate controller is located in every output port of the MIMO router and can calculate the respective advertised source transmission rates based on the instantaneous queue length of the buffer.
Keywords :
Internet; MIMO systems; Nyquist stability; PI control; adaptive control; computer network management; control system synthesis; queueing theory; robust control; self-adjusting systems; telecommunication congestion control; telecommunication network routing; telecommunication traffic; Internet; MIMO AQM router; active queue management; best-effort service traffic; direct Nyquist array method; interval gain margin assignment; multiple-input multiple-output; proportional-integral; self-tuning multiloop PI rate controller design; stability robustness; Control systems; DNA; Error correction; MIMO; Pi control; Proportional control; Robust stability; Shape control; Traffic control; Web and internet services;
Conference_Titel :
High Performance Switching and Routing, 2005. HPSR. 2005 Workshop on
Print_ISBN :
0-7803-8924-7
DOI :
10.1109/HPSR.2005.1503263
