A Unified Traffic Control Scheme for ATM Networks

1996

This paper reviews the current state of the art in the rapidly developing areas of ATM traffic controls and traffic modeling, and identifies future research areas to facilitate the implementation of control methods that can support a desired quality of service without sacrificing network utilizations. Two sets of issues are identified, one on the impacts of realistic traffic on the efficacy of traffic controls in supporting specific traffic management objectives, and the other dealing with the extent to which controls modify traffic characteristics. These issues are illustrated using the example of traffic shaping of individual ON-OFF sources that have infinite variance sojourn times.

International Journal of Digital & Analog Communication Systems, 1990

Determining approaches to congestion and flow control, especially real-time components in an overall strategy, is recognized as one of the fundamental challenges facing broadband 'packet-based' information transport, as, for instance, in the case of BISDN/ATM. In this paper we summarize basic issues underlying this subject, and describe a particular approach to achieving a multilayer broadband congestion, flow and error-control architecture, based on a 'core' congestion control strategy that we term bandwidth management. The modular and layered nature of this control architecture is described, and shown to lend itself to a structured approach to characterizing the control architecture performance.

1995

In this paper a global control system for admission control, routing and bandwidth allocation in the ATM environment is presented. The traffic is divided into classes, characterized by statistical parameters and by Quality of Service (QoS) requirements, as the rates of lost and delayed cells. At connection set-up, a strategy decides if a connection request has to be accepted or rejected and which is the best route that all the cells of that connection have to follow. The decision about acceptance guarantees the QoS requirements for each class, while the routing strategy is aimed at minimizing the number of blocked calls in the network. The whole system provides also a mechanism to achieve a fair and adaptive bandwidth allocation for each traffic class; the bandwidth allocation control has a longer intervention period than the admission and routing control. In fact, the global strategy can be regarded as a hierarchical one. Several simulation results are reported, to verify the effectiveness both of the admission and routing mechanism and of the allocation strategy.

Novel Algorithms and Techniques In Telecommunications, Automation and Industrial Electronics, 2008

As ATM network is designed for broad band transmission that is high data rate (25 Mbps to 2.5 Gbps) and supports the transmission of every kind of data, congestion control and delay have been important issues for ATM networks. Data transmission is done in the form of cell (53 bytes) relay. Hence, cell sequence and the error control have to be carried out properly. ATM networks presents difficulties in effectively controlling congestion not found in other types of networks, including frame relay networks. In this paper, we present an efficient methodology for traffic management. The simulation results suggest that the proposed solution is effective for both slow and high data rate transmission.

European Transactions on Telecommunications, 1992

Asynchronous Transfer Mode (ATM) is a promising technique to implement the Broad-band ISDN. When bursty sources are considered, high network efficiency can be obtained by taking advantage of statistical multiplexing. This technique requires to monitor the user behavior, in order to guarantee that the actual traffic parameters do not exceed the maximum values compatible with the required Grade of Service. The paper reviews the major results on the analysis of the control mechanisms. In particular, the three following issues are considered. The Connection Admission Control for both homogeneous and heterogeneous traffic sources is analyzed and the performance of different approaches are compared. The Leaky Bucket mechanism is studied for the Usage Parameter Control and its performance, such as reaction and recovery time, are analyzed. The traffic shaping function is considered in both cases of availability and non availability of a feedback on the traffic sources. The effectiveness of this functionality is investigated.

1991

Among the techniques proposed for B-ISDN transfer mode, ATM concept is considered to be the most promising transfer technique because of its flexibility and efficiency. This paper surveys and reviews a number of topics related to ATM networks. Those topics cover congestion control, provision of multiple classes of traffic, and error control. Due to the nature of ATM networks, those issues are far more challenging than in conventional networks. Sorne of the more promising solutions to those issues are surveyed, and the corresponding results on performance are summarized. Future research problems in ATM protocol aspect are also presented.

Congestion control mechanisms for ATM networks as selected by the ATM Forum traac management group are described. Reasons behind these selections are explained. In particular , selection criterion for selection between rate-based and credit-based approach and the key points of the debate between these two approaches are presented. The approach that was nally selected and several other schemes that were considered are described.

Proceedings IEEE Southeastcon'99. Technology on the Brink of 2000 (Cat. No.99CH36300)

ATM network does not operate in effective and stable way without preventing Congestion. Traffic management concerns with the design of mechanisms which ensure that the network bandwidth, buffer and resources are efficiently utilized, while meeting the various Quality of Service (QoS) guarantees given to sources as part of a traffic contract. In this paper, A new and improved congestion control scheme is proposed to support the best-effort ABR traffic, as a result of investigating the most widely recognized congestion control schemes for ABR service. Some of these schemes show either lack of scalability or fairness while other well-behaved schemes may require highly complex switch algorithm that is unsuitable for implementation in cell-switching high-speed ATM networks. Our algorithm provides the congestion avoidance ability with high throughput and low delay, in addition of achieving the max-min fairness allocation.

This paper address the performance of integration of video, voice, and data traffic on ATM Ring network. A proposed method namely "Control mechanism" to provide fairness among the traffics it confirms its effectiveness for integration of traffic on the ATM Ring network. The ATM Ring is similar to that in [6], as shown in Figure 1.

1996

The design of Broadband Integrated Services Digital Networks (B-ISDN) requires the investigation of specific techniques to guarantee different Quality of Services (QoS) requirements for each traffic class in the network. In this context, a unified environment for the simulation and design of an ATM node is a useful approach to test the effectiveness and the implementation aspects of the techniques mentioned above. In this paper a complete ATM node has been modelled in VHDL in a modular and flexible way and critical computational aspects are investigated