Computation of the limiting distribution in queueing systems with repeated attempts and disasters

— Single server queues with repeated attempts are useful in the modeling of computer and télécommunication Systems. In addition, we consider in this paper the possibility of disasters. When a disaster occurs, all the customers present in the system are destroyed immediately. Using a regenerative approach, we dérive a numerically stable recursion scheme for the state probabilities. This model can be employed to analyze the behaviour of a buffer in computers with virus infections.