Accession Number : ADA190682

Title :   A Simulation Model of the ASD (Aeronautical Systems Division) Central Datacomn System (CDS).

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Smedley, Richard D , Jr

PDF Url : ADA190682

Report Date : Dec 1987

Pagination or Media Count : 98

Abstract : The purpose of this effort was to develop a simulation model of the CDS, a complex data communications network, using Simulation Language for Alternative Modeling (SLAM) II. The study had two objectives: 1) Determine if the current design can support the projected Phase I workload. This determination is made after looking at the local packet delay, the availability of input and output lines, and the utilization of the various components; and 2) Determine the effect of increased DDN traffic on the CDS. The specific effects studied are the packet delay within the DDN gateways, the local packet delay, and the total CDS delay on DDN packets. Since the CDS was not operational during the model development, there were no CDS statistics available to develop the workload; therefore, the input data driving the model was derived from the workload on the current computer systems. This analysis included the basic steps of collecting the data, forming a histogram, making a distributional assumption, and using the chi-square goodness-of-fit test to accept or reject the assumptions. The CDS simulation model demonstrated the ability of the CDS to support the Phase I workload. Additionally, the model verified that SLAM II can be used to model complex communications networks. Keywords: Theses; Digital computer simulation.

Descriptors :   *COMMUNICATIONS NETWORKS, *DIGITAL SIMULATION, *COMPUTER COMMUNICATIONS, AVAILABILITY, CHI SQUARE TEST, DATA TRANSMISSION SYSTEMS, INPUT, NETWORKS, SIMULATION, SIMULATION LANGUAGES, THESES, WORKLOAD

Subject Categories : Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE