Hierarchical Coded Caching in High Memory Regime with Coded Placement
Rajlaxmi Pandey, Charul Rajput, and B. Sundar Rajan

TL;DR
This paper introduces two novel hierarchical coded caching schemes with coded placement that outperform existing methods at specific memory points, especially in high memory regimes, by optimizing bandwidth usage in a two-layer network.
Contribution
The paper proposes two new coded caching schemes based on coded placement tailored for high memory regimes in hierarchical networks, improving bandwidth efficiency at certain memory configurations.
Findings
Proposed schemes outperform existing schemes at specific memory points.
The schemes are effective in high memory regimes with coded placement.
Comparison using composite rate shows bandwidth improvements.
Abstract
We consider a two-layer hierarchical coded caching network where a server with a library of files is connected to mirrors, each having a cache memory of size . Each mirror is further connected to users, each equipped with a dedicated cache of size . In this paper, we propose two distinct coded caching schemes based on coded placement, corresponding to two distinct memory pairs, \( (M_1, M_2) \). We show that the proposed schemes outperform the existing schemes at these memory points given by the proposed schemes for smaller values of . In setups where mirrors are positioned near each other, avoiding signal interference is crucial. This can be ensured by having all mirrors transmit using orthogonal carrier frequencies. To compare our schemes with existing ones, we used the composite rate metric, which accurately represents the total bandwidth utilized in…
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Taxonomy
TopicsCaching and Content Delivery · Advanced Data Storage Technologies · DNA and Biological Computing
