  In the original coded caching model introduced by Maddah-Ali and Niesen in
2014, the server starts broadcasting only after it receives demands from all
the users. So, all the users must be active during the delivery phase. In this
work, we consider a coded caching model called hotplug coded caching in which
some of the users are offline during the delivery phase. This model was first
introduced by Ma and Tuninetti (``On Coded Caching Systems with Offline Users,"
2022 IEEE International Symposium on Information Theory). The concept of
Hotplug Placement Delivery Arrays (HpPDAs) for the hotplug coded caching
systems was introduced in (``Improved Hotplug Caching Schemes Using PDAs and
$t$-Designs," \emph{arXiv:2311.02856}, 2024), in which the authors have
constructed HpPDAs from $t$-designs. This work provides a new hotplug coded
caching scheme from the existing HpPDAs. The performance comparison of the
proposed scheme with the existing schemes is presented. When applied for HpPDAs
from $t$-designs, our scheme outperforms the baseline scheme by Ma and
Tuninetti, and the Improved $t$-scheme by Rajput and Rajan in some memory
regimes.
