CIRCUIT-SWITCHED ROUTING IN INTEGRATED SERVICES DIGITAL NETWORK ENVIRONMENT.
Item
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Title
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CIRCUIT-SWITCHED ROUTING IN INTEGRATED SERVICES DIGITAL NETWORK ENVIRONMENT.
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Identifier
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AAI8801678
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identifier
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8801678
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Creator
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AMINJAFARI, AYAT.
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Contributor
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Tarek Saadawi
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Date
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1987
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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 circuit-switched networks, routing is a procedure in which a path is assigned to a call between the source node and the destination node. In this research, the routing problem in a circuit-switched ISDN environment is addressed. This research is felt to be necessary to provide some insight into the problems associated with the performance evaluation of multi-user communication networks such as CATV and, most importantly, ISDN. This work consists of three parts. In the first part, we present an n-dimensional birth-death steady-state traffic model to evaluate the blocking probability experienced by n different classes of users in a network. With n equal to two (i.e., two groups of users), the model is then used to determine the circuit-switched capability of CATV systems with a tree-like topology. In the second part, the circuit-switched routing in an ISDN environment is introduced and a mathematical model for alternate routing is developed. In this model we consider two types of users--home users and business users. The performances of two different routing procedures in fully connected netowrks are compared. These procedures include alternate routing and non-alternate routing. The performance criteria used in the comparison are the average network blocking rate and end-to-end blocking probability. For light to moderate traffic loads, the results show that alternate routing performs better than non-alternate routing. Under heavy traffic conditions, the performance of alternate routing deteriorates as compared to that of non-alternate routing.;In the last part, the heavy load performance of alternate routing is discussed and the truck reservation policy for the case of two groups of users is introduced. To implement this policy, two cases are considered: (1) non-uniform and (2) uniform truck reservation schemes. The results show that the truck reservation scheme can be used as an effective way to overcome the performance degradation caused by uncontrolled alternate routing.
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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
