Service Strategies in Two-Server Tandem Configurations - Modeling and Investigation

摘要

In this document, two different service strategies in an Internet service station, which consists of with two separated servers (tandem), are investigated. At beginning the Internet tandem under study is first formulated as an open three-station queuing network with blocking assuming that there are finite capacity buffers at front of each server. For each Internet station configurations, the two-dimensional state graphs ware constructed and set of steady-state equations are created. These equations allow for calculating the state probabilities vectors for each tandem configurations, using an equation solving techniques. Many useful performance measures regarding the tandem configurations under study can be extracted from the steady-state probability vectors. The numerical part of this paper contains example for the investigation of different tandem configurations, where are presented the results of the calculation of the main measures of effectiveness and quality of service (QoS) parameters.