A Simulation Methodology To Study Input Buffering In ATM Switches  

Oleh:

Obaidat, M. S. ; Riehl, Mark

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Simulation vol. 72 no. 5 (May 1996), page 295-304.
Topik: ATM switches; input buffering; performance evaluation; simulation; high-speed networking
Fulltext: 295.pdf (1.62MB)

Isi artikel

This paper presents a performance study of input buffering in Asynchronous Transfer Mode switches. The main performance metrics are average cell waiting time and output port contention under a variety of load conditions and operating environments. Results show that as the percent utilization increases, the average cell wait time increases. Analysis of output port contention shows that it increases with the increase in utilization, and the number of conflicts increases with both the utilization and the input queues. The results are presented in a series of curves that present the number of cells delivered during output conflicts versus percent utilization. The software developed offers several benefits: it provides a flexible approach to investigate performance of input queueing under a variety of conditions. The simulation duration, interarrival distribution, number of input queues and maximum queue size can all be varied simply by editing the initialization file; no recompiling of source code is required. It allows for modification and extensibility with only minor software changes. It does not contain operating-specific function calls; thus, it can be used without changes on standard DOS-based PCs or UNIX-based systems.

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