Simulation study of the token bus local area network

Theoretical models for the explicit token-bus local area network using both static and dynamic logical rings have been verified using simulation models based on the ANSI/IEEE 802.4 international standard. The effects of single- or multiple-packet transmission, slot time, and increasing ring maintenance overheads on the waiting times are investigated. The results are then compared to determine thresholds for choosing optimum ring and service discipline configurations. It is shown that for network loading below 0.6 the dynamic ring is generally more efficient than the static ring. For higher values of the network throughput any gains in the token-passing time are outweighed by the increasing values of the dynamic ring maintenance overhead