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Technical Program

Paper Detail

Paper IDD7-S7-T3.2
Paper Title Data Freshness in Mixed-Memory Intermittently-Powered Systems
Authors James Scott Broadhead, Przemyslaw Pawelczak, Delft University of Technology, Netherlands
Session D7-S7-T3: Data Freshness
Chaired Session: Wednesday, 21 July, 00:00 - 00:20
Engagement Session: Wednesday, 21 July, 00:20 - 00:40
Abstract 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.