2024/04/09 by Mallikharjuna Chinnapadamala, Chinnapadamala, Mallikharjuna, Charul Rajput +3 · 1 citation
Biochemistry, Genetics and Molecular Biology · Computer Science · #Caching and Content Delivery #Cooperative Communication and Network Coding #DNA and Biological Computing #FOS: Computer and information sciences #Information Theory (cs.IT)
paper · pdf · doi:10.48550/arxiv.2404.06433
openalex publication_date 2024/04/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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," 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.