Suboptimal RED Feedback Control for Buffered TCP Flow Dynamics in Computer Network
Author(s) -
Naveed Ahmed,
Xuhua Ouyang
Publication year - 2007
Publication title -
mathematical problems in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.262
H-Index - 62
eISSN - 1026-7077
pISSN - 1024-123X
DOI - 10.1155/2007/54683
Subject(s) - active queue management , random early detection , network congestion , computer science , router , queue , network packet , control theory (sociology) , process (computing) , synchronization (alternating current) , mathematical optimization , computer network , channel (broadcasting) , control (management) , mathematics , artificial intelligence , operating system
We present an improved dynamic system that simulates the behavior of TCP flows and active queue management (AQM) system. This system can be modeled by a set of stochastic differential equations driven by a doubly stochastic point process with intensities being the controls. The feedback laws proposed monitor the status of buffers and multiplexor of the router, detect incipient congestion by sending warning signals to the sources. The simulation results show that the optimal feedback control law from the class of linear as well as quadratic polynomials can improve the system performance significantly in terms of maximizing the link utilization, minimizing congestion, packet losses, as well as global synchronization. The optimization process used is based on random recursive search technique known as RRS
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