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Paper detail

Data Freshness in Mixed-Memory Intermittently-Powered Systems

Age of Information (AoI) is a key metric to understand data freshness in Internet of Things (IoT) devices. In this paper we analyse an intermittently-powered IoT sensor - with mixed-memory (volatile and non-volatile) architecture - that uses a Time-Dependent Checkpointing (TDC) scheme. We derive the average Peak Age of Information (PAoI) and average AoI of the system, and use these metrics to understand which device parameters most significantly influence performance. We go on to consider how the average PAoI of a mixed-memory system compares with entirely volatile or entirely non-volatile architecture, and also introduce an alternative TDC strategy to improve system resilience in unpredictable environmental conditions.

preprint2021arXivOpen access
James Scott BroadheadPrzemysław Pawełczak
math.ITInformation Theory
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James Scott BroadheadPrzemysław Pawełczak

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