A control-theoretic approach to the design of an explicit rate controller for ABR service

Kolarov, A.; Ramamurthy, G.

doi:10.1109/90.803387

Cited by 98 publications

(38 citation statements)

References 7 publications

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“…The sources monitor the returning RM cells and adjust their transmission rates according to the ER information in the RM cells. There are a number of proposals for ATM switches to carry out ER calculations; see, for example, the references for existing ABR rate control algorithms [24][25][26]. In this paper, we choose to test the basic ERICA (Explicit Rate Indication for Congestion Avoidance) algorithm due to its simplicity, fairness, and rapid transient performance [19].…”

Section: D-abr Protocolmentioning

confidence: 99%

Rate-controlled optical burst switching for both congestion avoidance and service differentiation

Boyraz

Akar

2005

Optical Switching and Networking

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Optical Burst Switching (OBS) has recently been proposed as a candidate architecture for the next generation optical Internet. Several challenging issues remain to be solved to pave the way for the OBS vision. Contention arises in OBS networks when two or more bursts are destined for the same wavelength, and a wide variety of reactive contention resolution mechanisms have been proposed in the literature. One challenging issue in OBS is proactively controlling the traffic flowing through the OBS network so that the network does not stay in a persistent state of contention, which we call the congestion avoidance problem. Another challenging issue is the need for service differentiation, which is common today in electronically switched networks via the use of advanced buffer management and scheduling mechanisms. However, such mechanisms cannot be used in OBS networks due to the limited use, or total absence, of buffering. One of the popular existing approaches to service differentiation in OBS networks is the use of larger offset times for high-priority bursts which, however, increases the delays and may adversely affect applicationlevel performance. In this paper, we propose a feedback-based rate control protocol for the control plane of the OBS network to both address the congestion avoidance and service differentiation issues. Using this protocol, the incoming traffic is dynamically shaped at the edge of the OBS network in order to avoid potential congestion in the burst-switched core. Moreover, the traffic shaping policies for the low and high priority traffic classes are different, and it is possible using the proposed protocol to isolate high-priority and low-priority traffic almost perfectly over time scales on the order of a few round-trip times. Simulation results are reported to validate the congestion avoidance and service differentiation capabilities of the proposed architecture.

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Section: D-abr Protocolmentioning

confidence: 99%

Rate-controlled optical burst switching for both congestion avoidance and service differentiation

Boyraz

Akar

2005

Optical Switching and Networking

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“…Substantial efforts have been devoted to this pursuit by researchers from the communications, control, and computer communities. For instance, linear control theory has been applied to the analysis of ATM network traf®c management problems [11,15,20].…”

Section: Related Workmentioning

confidence: 99%

“…Most recent papers on ABR rate control employ more or less standard results from basic control tools, such as linear feedback [15], pole placement [11], etc. By using discretetime models, the fundamental problem of stability under varying delays (in®nite dimensional systems) is avoided.…”

Section: Related Workmentioning

confidence: 99%

Robust control and rate coordination for efficiency and fairness in ABR traffic with explicit rate marking

Schwiebert

Wang

2001

Computer Communications

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The problem of ef®ciency and fairness of Available Bit Rate (ABR) traf®c with Explicit Rate (ER) marking is investigated from a control point of view. It is revealed that due to signi®cant uncertainty on time delays in ABR traf®c and strong interaction among switches, ABR traf®c imposes a great challenge to control strategy development. Focusing on robustness of congestion control and asymptotic fairness, we propose a new control strategy that employs robust control to accommodate delay uncertainty and rate coordination for fairness. Interaction between these two control actions leads to a non-standard multi-objective control problem. Overall stability of the system and convergence to fairness are rigorously analyzed. Conditions are presented under which robust stability and convergence are guaranteed. Simulation tests are then performed to demonstrate that a redesign of feedback controllers may become necessary to satisfy these conditions. q

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“…However, no analysis is presented on how to design the controller parameters. Some papers have investigated PID-controllers in ATM flow control, see for example [6]. However, the papers analysing queuing systems with control theoretic methods usually describe the system with linear deterministic models.…”

Section: Introductionmentioning

confidence: 99%

Performance modelling and control of server systems using non-linear control theory

Kihl¹,

Robertsson²,

Wittenmark³

2003

Providing Quality of Service in Heterogeneous Environments, Proceedings of the 18th International Teletraffic Congress - ITC-18

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All service control nodes, for example SCPs, HLRs, and MSCs, are constructed as a server system with one or more servers that process incoming requests. Since service control nodes are sensitive to overload, admission control mechanisms are often implemented. In this paper, we model and analyse admission control mechanisms for server systems with control theoretic methods. We develop a nonlinear stochastic control theoretic model of a GI/G/1-system. Further, we show that this model can be used to design admission control mechanisms that behave well in the "real" system, that is the queuing system. We develop two types of controllers for the system, one PI-controller and one RST-controller, both commonly used in automatic control. Also, we discuss some of the limitations of previous work in this area, in which only deterministic and linear models have been used.

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A control-theoretic approach to the design of an explicit rate controller for ABR service

Cited by 98 publications

References 7 publications

Rate-controlled optical burst switching for both congestion avoidance and service differentiation

Rate-controlled optical burst switching for both congestion avoidance and service differentiation

Robust control and rate coordination for efficiency and fairness in ABR traffic with explicit rate marking

Performance modelling and control of server systems using non-linear control theory

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