Modelling and analysis of display terminal at a finite user resource sharing node in distributed computer systems

摘要

An intelligent display terminal system at a finite user resource sharing node in distributed computer systems is modelled as a queueing model with finite microcomputer memory, burst Erlang arrivals from the display terminal cathode-ray-tube, constant service-time, synchronous transmission and single server interrupted through a first-order Markov process. A new generalized method differs from the usual stage and summing method used by the previous research-workers is presented to calculate burst Erlang arrival probabilities. The display terminal microcomputer memory performance is studied for finite and infinite cases and the expressions for overflow probabilities and average queueing delays are derived using the recursive method developed for calculating steady state probabilities of the microcomputer memory states. An integrated voice-data system is presented as a probable application of the model at remote areas and some of its computed values are portrayed on graphs to be useful in calculating response times of remote display terminals sharing voice channels for transmission purpose.