White : Controlling The Internet Congestion With Integral Controller

Abstract

Congestion occurs when resource demands exceeds the capacity. At this moment, congestion are solved by the involvement of two controlling mechanism, they are flow control in the TCP source and active queue management (AQM) in the link. AQM will provide feedback to the source a kind of indication for the occurrence of the congestion in the link, whereas the source will adapt the sending rate appropriate with the feedback. The indication of the feedback congestion is influenced by the number of the sources, time delay, and its sending rate. Consequently, adaptation of the sending rate based on the feedback indirectly observes behavior of other sources. This control system structure is much known with distributed control system, because the control mechanism is distributed in each source. On this structure, the source mechanism is more important than the link. This paper will explain a new algorithm, which focus more on the link as an allocation capacity controller. Then the source will adapt the sending rate based on set point the link provides