Design and analysis of a medium access and control strategy for extending the ISDN services to LAN users

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Shafiq, Muhammad
Major Professor
Douglas W. Jacobson
Arthur V. Pohm
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Electrical and Computer Engineering

The Department of Electrical and Computer Engineering (ECpE) contains two focuses. The focus on Electrical Engineering teaches students in the fields of control systems, electromagnetics and non-destructive evaluation, microelectronics, electric power & energy systems, and the like. The Computer Engineering focus teaches in the fields of software systems, embedded systems, networking, information security, computer architecture, etc.

The Department of Electrical Engineering was formed in 1909 from the division of the Department of Physics and Electrical Engineering. In 1985 its name changed to Department of Electrical Engineering and Computer Engineering. In 1995 it became the Department of Electrical and Computer Engineering.

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  • Department of Electrical Engineering (1909-1985)
  • Department of Electrical Engineering and Computer Engineering (1985-1995)

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A significant portion of the contemporary research efforts in the area of data communications and computer networking is devoted to Local Area Networks (LANs) and Integrated Services Digital Networks (ISDNs). Both, ISDN and LAN, are being developed to satisfy the key requirements of their specific applications. This application specific development has created a semantic gap between ISDN and LANs. Consequently, an extensive mapping is required to interface an ISDN with a LAN. Obviously, such mapping may limit the overall performance of a LAN;In this dissertation, a Medium Access and Control Strategy (MACS) is proposed that does not require a complex ISDN/LAN interface and extends the ISDN services to a LAN user without degrading the performance of the LAN. The proposed MACS is distributed in nature, supports a prioritized realtime traffic (using dynamically controlled target token rotation time), provides packet switching and circuit switching facilities, and can be implemented on a single ring topology;The analysis of the strategy indicates that a channel capacity of 64 Kbps is sufficient to carry the control and signalling information for 100 stations. The simulation results show that the network performance is drastically degraded at lower values of the target token rotation time. The proposed strategy solves this problem by dynamically adjusting the target token rotation time.

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Sun Jan 01 00:00:00 UTC 1989