Performance Modeling and Analysis of Parallel Processing and Low Earth OrbitSatellite Communication Systems

摘要

This dissertation presents unique and valuable insight into the analysis ofpacket-switched data communication systems. The research described in this dissertation examines performance characteristics of two types of packet-switched data communication systems. The first system to be analyzed operates in a parallel processing environment where cooperating processors independently perform assigned tasks. In this environment, the packet delay performance is dominated by queuing delays. The second type of system examined operates in a low earth orbit (LEO) satellite communications network environment. In this type of network, delay performance is affected by both queuing and propagation effects. The objectives of this research are to study the effects of queuing and propagation on the average packet delay, the number of buffers required to implement the networks that interconnect the parallel processors, and the satellite resource utilization rates. For both types of communication systems, mathematical metamodels (Agr85) are developed to capture the effects on packet delay caused by incremental changes in network dependent parameters.