Quantitative study of uncontrolled transients on ABR congestion control
نویسنده
چکیده
The ABR service category of ATM architecture is a best effort service which aims to provide rapid access to unused network bandwidth at up to the link rate whenever the network bandwidth is available. As a result, the transfer characteristics provided by the network may change subsequent to connection establishment, and a congestion control mechanism is required. The ATM Forum has specified a congestion control infrastructure from where congestion control mechanisms like EFCI, EPRCA, ERICA and others have been proposed. The analysis of the underlaying infrastructure shows that, for the present switch and end-system behavior definitions, situations can arise when sources are allowed to transmit without control by the implemented congestion control mechanism. This study presents a quantitative analysis of the expected effects.
منابع مشابه
Buffer analysis of the explicit rate congestion control mechanism for the ABR service category in ATM networks
In this paper we consider an ABR traac stream which shares an output port of a switch with delay sensitive CBR/VBR traac. Congestion control of the ABR traac is achieved by means of an Explicit Rate congestion control scheme. The occupancy of the ABR-buuer in the switch is analytically evaluated. Application of the analysis on numerical examples illustrates the innuence of the following system ...
متن کاملDesign and simulation of ATM-ABR end system congestion control
We develop a simulation model for the ATM ABR service, and use it to engineer ABR congestion control behavior. Although significant work has been performed on ABR rate allocation algorithms at network switches, little work has focused on the end system behavior, which we examine in this paper. The effect of the speed of links on the path from the source to the destination, and the connection ro...
متن کاملBuffer and Throughput Analysis of the Explicit Rate Congestion Control Mechanism for ABR services in ATM networks
In this paper we consider ABR traffic which shares an output port of a switch with delay sensitive CBR/VBR traffic. Congestion control of the ABR traflic is achieved by mean? of an Explicit Rate control scheme. Two important performance measurea are evaluated using an analytical model : the ABR-buffer occupancy distribution in the switch and the ABR traffic throughput. We consider two types of ...
متن کاملRobustness of Rate-Based Congestion Control Algorithm with Binary-Mode Switch in ATM Networks
A rate-based congestion control algorithm has been developed and standardized in the ATM forum for ABR service class. Even though the performance of the rate-based congestion control algorithm heavily depends on the selection of those control parameters, the selection method of parameters is not shown in the standard. In this paper, by extending our previous work, appropriate settings of rate-c...
متن کاملE ective Frequency Range of Rate-Based Closed-Loop Congestion Control for ABR Service
The Available Bit Rate (ABR) service class has been de ned by the ATM Forum. Closed-loop ratebased congestion control has been adopted by the ATM Forum as the standard approach for supporting ABR service in ATM networks. This paper examines congestion control mechanisms for ABR service and presents fundamental performance results for rate-based tra c management schemes under varying available b...
متن کامل