Document Type


Date of Award


Degree Name

Master of Science in Electrical Engineering - (M.S.)


Electrical and Computer Engineering

First Advisor

MengChu Zhou

Second Advisor

Anthony D. Robbi

Third Advisor

David T. Wang


This thesis has proposed a performance analysis method for Carrier Sensing Multiple Access Ring Network (CSMA) based on Petri net methodologies. The method can offer more accurate results than traditional queuing methods, but less than simulation results. In the CSMA network access protocol is studied in this thesis, when a passing message is detected by a station, it stops transmitting immediately in order to avoid a collision.

A generalized stochastic Petri nets model is made first, then the SPNP package is used to do the analysis. The analysis results show that even at a very heavy load fraction of near 2.0, the average delay of packets is at a very low level by transmitting the packages at the gap between two packages in the ring. The network performance over a wide range of network parameters including various packet sizes and numbers of stations are analyzed. The limitations and future research related to CSMA performance studies are discussed.



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