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A status updating system is considered in which data from multiple sourcesare sampled by an energy harvesting sensor and transmitted to a remotedestination through an erasure channel. The goal is to deliver status updatesof all sources in a timely manner, such that the cumulative long-term averageage-of-information (AoI) is minimized. The AoI for each source is defined asthe time elapsed since the generation time of the latest successful statusupdate received at the destination from that source. Transmissions are subjectto energy availability, which arrives in units according to a Poisson process,with each energy unit capable of carrying out one transmission from only onesource. The sensor is equipped with a unit-sized battery to save the incomingenergy. A scheduling policy is designed in order to determine which source issampled using the available energy. The problem is studied in two mainsettings: no erasure status feedback, and perfect instantaneous feedback.

Timely Status Updating Over Erasure Channels Using an Energy Harvesting Sensor: Single and Multiple Sources