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The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title: Petri net modeling and performance analysis of Z39.50 search and retrieval protocol
Author: Paranjpe, Roopali
View Online: njit-etd1997-081
(xv, 112 pages ~ 3.4 MB pdf)
Department: Department of Electrical and Computer Engineering
Degree: Master of Science
Program: Electrical Engineering
Document Type: Thesis
Advisory Committee: Zhou, MengChu (Committee chair)
Hou, Edwin (Committee member)
Carpinelli, John D. (Committee member)
Date: 1997-05
Keywords: Computer network protocols--Standards.
System analysis.
Petri nets.
Availability: Unrestricted
Abstract:

Z39.50 is an American Standard for information retrieval. The standard depicts a client-server model of computing. With reference to the Open System Interconnection (COSI)) model developed by International Standards Organization (ISO); Z39.50 is an application layer protocol. A Z39.50 client performs searching, querying and requesting functions and a Z39.50 server interfaces with the database in the remote system and responds to client requests by providing a set of records for the search query.

Z39.50 state tables describe a complex set of concurrent and serial events. A Petri net model is prepared for the entire system comprising the protocol. A Petri net methodology proves to be a very effective way of analyzing this client-server model. A Reachability Graph is applied to the Petri Net model to study the behavioral properties of the protocol. We have used a timed Petri net simulator to evaluate the performance of this protocol.


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