Study of the behaviour of Hubnet

The behaviour of Hubnet is studied and analysed. A simulation model is developed from which the effect of the retry time on the performance of Hubnet is studied. It is shown that there is an inherent dependency between the packet length and the retry time. According to this dependency, retry time-values which are factors of the packet length exhibit superior performance in terms of reduced average delay and increased system utilisation, even when compared with some systems with smaller retry times. A novel analysis of Hubnet under overload conditions is provided. It is shown that Hubnet, under overload conditions, operates in a round-robin fashion, and that the channel-access time is bounded. The performance of Hubnet in a prioritised environment is explored. It is shown that Hubnet is a very good candidate for voice and data integration.