Advanced Modeling and Optimization

Abstract for Paper 3 of Volume 3, Number 2, 2001, pp. 19-34


One formal and object oriented approach of the variable number of working stations of waiting system of head of line type.


Ion Florea
"Transilvania" University of Brasov
Departament of Computer Science
Iuliu Maniu Str., No. 50, Brasov, Code 2200
E-mail: i.florea@info.unitbv.ro
Phone:068/163571

Abstract

Complex queuing systems imply a discipline of services based on priority treatment of certain clients. The queuing systems of head - of - line type is an appropriate models for numerous real systems. In [6] I have introduced the variable number of parallel stations queuing system and in [5] I have presented simulation algorithms for the queuing system of this type, with head - of - line serving discipline. In [4], respectively in [8], the formal and object oriented models of the waiting system, with one station, respectively constant number of parallel serving stations have been proposed. Based on the DEVS formalism, that is the base of formal, modular and hierarchical modeling and object-oriented simulation of systems, in this paper I present simulation models for multi-servers queuing systems with variable number of working stations. Further, formal and modular description of systems behavior eliminates the possibility of introducing errors. To each DEVS model, an abstract simulator we associate and using of the advanced concept of Object Oriented Language C++, the abstract simulator was implemented.