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Uptime and downtime analysis for hierarchical redundant systems in telecommunications
2012
Performance Evaluation Review
We consider non-degradable hierarchical redundant systems having multiple working and failure modes with restoration time depending on failure type. We evaluate these systems using two measures: generalized uptime and traditional downtime. We define the Impact Weighted System Uptime (IWSU) and illustrate its usefulness in practical terms, viz., an IP router. Next, we provide an analysis that fits the downtimes by a heavy-tailed log PH distribution. For these downtime distributions, we study
doi:10.1145/2425248.2425262
fatcat:4diejbwq7rdeffzhp534lmfd7e