Graduate School and Research Center in Digital Sciences

Multi-access coded caching: gains beyond cache-redundancy

Serbetci, Berksan; Parrinello, Emanuele; Elia, Petros

ITW 2019, IEEE Information Theory Workshop, 25-28 August, 2019, Visby, Gotland, Sweden

The work considers the K-user cache-aided shared-link broadcast channel where each user has access to exactly z caches of normalized size, and where each cache assists exactly z users. For this setting, for two opposing memory regimes, we propose novel caching and coded delivery schemes which maximize the local caching gain, and achieve a coding gain larger than 1+K (users served at a time) despite the fact that the total cache redundancy remains K irrespective of z. Interestingly, when z = K−1 K  , the derived optimal coding gain is K z + 1, matching the performance of a hypothetical scenario where each user has its own dedicated cache of size z.

Document Bibtex

Title:Multi-access coded caching: gains beyond cache-redundancy
Type:Conference
Language:English
City:Visby
Country:SWEDEN
Date:
Department:Communication systems
Eurecom ref:5952
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Bibtex: @inproceedings{EURECOM+5952, year = {2019}, title = {{M}ulti-access coded caching: gains beyond cache-redundancy}, author = {{S}erbetci, {B}erksan and {P}arrinello, {E}manuele and {E}lia, {P}etros}, booktitle = {{ITW} 2019, {IEEE} {I}nformation {T}heory {W}orkshop, 25-28 {A}ugust, 2019, {V}isby, {G}otland, {S}weden}, address = {{V}isby, {SWEDEN}}, month = {08}, url = {http://www.eurecom.fr/publication/5952} }
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