Study of congestion control schemes in multimedia traffic networks.
Item
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Title
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Study of congestion control schemes in multimedia traffic networks.
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Identifier
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AAI9510713
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identifier
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9510713
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Creator
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Saleh, Mohsen A.
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Contributor
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Tarek N. Saadawi
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Date
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1994
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical
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Abstract
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In our study, we are interested in the access flow control and the bandwidth control window which are applied at the cell level during the progress of the call. The flow control action, at the cell level, is implemented at the input access of the multiplexer. Using a suitable congestion measure, namely the multiplexer buffer length, the scheme dynamically controls the arrival rate by switching the coder to a different compression ratio (i.e., Changing the coding rate). VBR coding methods can be adaptively adjusted to transmit at a lower rate with very little degradation in the service quality. Comparisons between statistical, deterministic and bandwidth control window allocations to voice and video traffic are presented. Our objective, here, is to control the input bursty traffic at heavy congestion states and to be able to traffic shape the input arrival process such that we can smooth down its characteristics and force it to be well behaved.;Our study analyzes the performance of an access node in ATM network with and without flow control using simulation methods, and includes the following, multiplexing of homogeneous types of traffic as voice or video sources, multiplexing of heterogeneous types of traffic as voice and video sources and bandwidth management for different classes of traffic using deterministic, statistical and bandwidth control window allocation to voice and video traffic.;The contribution of this study is to provide a performance evaluation of the access flow control algorithm which is applied at the access nodes to the integrated network, specifically at the input voice and video multiplexers. Also it provides a performance analysis of the bandwidth assignment to voice and video traffic. The results of the simulation study include the optimum values of the multiplexer buffer thresholds that satisfy an objective cell blocking probability of 10{dollar}\sp{lcub}-4{rcub}{dollar} for voice traffic and 10{dollar}\sp{lcub}-7{rcub}{dollar} for video traffic and the effects of the access control window (the minimum period of time at which the controller stays in a given state before it is being triggered to another action) on the controller triggering rate and mean bits per sample. Also the optimum values of the bandwidth control window are presented.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Engineering
