* Telecommunications: local area networks

I'm interested in the performance evaluation of token-ring local area networks. These networks have often been modeled by ``polling systems" in which a single server moves cyclically between queues; the average throughput, delay, cycle time duration etc. for polling systems have been analyzed for Poisson input processes. Local-area networks are, however, more complex. They involve time constraints for asynchronous traffic, and the Poisson assumption on the arrival process is often unrealistic. This poses an interesting challenge in the analysis of local area networks based on token-ring protocols.