Abstract
In an ATM network, it can be necessary to protect some cells against rejection when entering finite-capacity buffers. “Space priority” is an access mechanism intended to provide such a protection by allowing them to take the place of less important cells in case of congestion. We study an M/G/1 queue using this operating mode and we compute loss probabilities for both flows. The model is then compared with the usual finite capacity queue in order to qualify space priority: reduction in buffer size, and increase in the admissible load for a given Grade of Service.
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