Title: Joint coded caching and distributed storage with product matrix non-systematic code

Authors: Natasa Paunkoska-Dimoska; Venceslav Kafedziski

Addresses: Faculty of Communication Networks and Security, The University of Information Science and Technology (UIST) "St. Paul the Apostle", Partizanska bb., 6000, Ohrid, Macedonia ' Faculty of Electrical Engineering and Information Technologies, University Ss Cyril and Methodius, Rugjer Boshkovik 18, P.O. Box 574, 1000, Skopje, Macedonia

Abstract: The coded caching technique and data distribution on multiple servers, known as a distributed storage system (DSS), are two separate concepts that bring various improvements to the communication environment. Combining the two techniques enhances the user network performance by decreasing the peak rate, optimising the user memory and decreasing the latency. This paper investigates the benefits of merging coded caching and distributed storage in various multiserver systems. Hence, we propose a new construction called the non-systematic. This approach considers using a multi-server system consisting of only parity servers and encoded linear combinations of popular file segments based on a predefine non-systematic code in the placement and delivery phases making this concept attractive in terms of security. The proposed concept achieves optimised results regarding the peak rate and the user cache memory and tremendously improves the data security compared to other multi-server systems.

Keywords: coded caching; cache memory; distributed storage; multi-server system; peak rate; security; systematic code; non-systematic code.

DOI: 10.1504/IJCNDS.2025.147271

International Journal of Communication Networks and Distributed Systems, 2025 Vol.31 No.4, pp.405 - 427

Received: 25 Jun 2023
Accepted: 11 Feb 2024
Published online: 14 Jul 2025 *

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