Dead-time compensation for ABR traffic control over ATM networks

Abstract

This paper presents a rate-based controller for throttling available bit rate (ABR) input rates in high speed asynchronous transfer mode (ATM) networks with significant propagation delays. First, a Smith predictor based controller is analyzed in terms of performance and stability. Saturation issues are handled with anti-windup techniques. Performance is improved by means of the feedback of an estimate of the ABR disturbance. This reduces the average queue level, guaranteeing the shortest delays possible while keeping the channel fully occupied. Finally, sensitivity to delay estimation errors is analyzed, and the limitations of the proposed controller are discussed.

Discrete time congestion controllers for multi-source connection-oriented communication networks

“…The applied scheme eliminates the threat of data loss resulting from the congestion and ensures full resource usage, even though the delay times are estimated by the controller imprecisely. On the contrary to the other results based on the Smith principle (Mascolo 1999(Mascolo , 2000Go´mez-Stern et al 2002;Bartoszewicz and Molik 2004;Bartoszewicz 2006), the strategy described here aims at improving the QoS of data transmission. As a result of employing extra feed forward bandwidth compensation the sensitivity of the packet queue length to the available bandwidth is significantly reduced.…”

“…Consequently, the node can keep track of the number n of connections served by the output link. It is assumed that only a single node is the bottleneck for the considered set of VCs, and multibottleneck topologies (similarly as in many significant articles in the field (Mascolo 1999(Mascolo , 2000(Mascolo , 2003Go´mez-Stern et al 2002;Quet et al 2002;Bartoszewicz and Molik 2004;Bartoszewicz 2006;Pietrabissa et al 2006)) are not explicitly considered in this contribution.…”

“…Due to possibly long propagation delays in the network, the Smith predictor was employed by several authors to control the input rate of the system (Mascolo 1999(Mascolo , 2000(Mascolo , 2003Go´mez-Stern, Forne´s, and Rubio 2002;Bartoszewicz and Molik 2004;Delli Priscoli and Pietrabissa 2004;Bartoszewicz 2006). Mascolo (1999) considered the single virtual connection control problem.…”

“…The same author extended the idea of the Smith prediction to control the network supporting multiple data flows in Mascolo (2000), and introduced feedforward compensation of the available bandwidth in Mascolo (2003). Further research on the congestion control in connection-oriented networks was conducted by Go´mez-Stern et al (2002). They proposed an algorithm combining the Smith principle with the PI controller.…”

Sliding Mode Congestion Controller for Data Transmission Networks with Unknown and Variable Packet Loss Rates

“…This method was initially applied to a simplified case with a single virtual connection [39] and then extended to networks consisting of multiple connections [40]. Then, a method combining the Smith predictor with the PI controller was proposed [41] and shown to reduce the average bottleneck queue length. The idea of combining the Smith predictor with a proportional controller with saturation was further explored by De Cicco et.…”