Imperial College London
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ProfessorDenizGunduz

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor in Information Processing
 
 
 
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Contact

 

+44 (0)20 7594 6218d.gunduz Website

 
 
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Assistant

 

Ms Joan O'Brien +44 (0)20 7594 6316

 
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Location

 

1016Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Mital:2020:10.1109/tcomm.2020.2991460,
author = {Mital, N and Gunduz, D and Ling, C},
doi = {10.1109/tcomm.2020.2991460},
journal = {IEEE Transactions on Communications},
pages = {4620--4631},
title = {Coded caching in a multi-server system with random topology},
url = {http://dx.doi.org/10.1109/tcomm.2020.2991460},
volume = {68},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Cache-aided content delivery is studied in a multi-server system with P servers and K users, each equipped with a local cache memory. In the delivery phase, each user connects randomly to any ρ out of P servers. Thanks to the availability of multiple servers, which model small-cell base stations (SBSs), demands can be satisfied with reduced storage capacity at each server and reduced delivery rate per server; however, this also leads to reduced multicasting opportunities compared to the single-server scenario. A joint storage and proactive caching scheme is proposed, which exploits coded storage across the servers, uncoded cache placement at the users, and coded delivery. The delivery latency is studied for both successive and parallel transmissions from the servers. It is shown that, with successive transmissions the achievable average delivery latency is comparable to the one achieved in the single-server scenario, while the gap between the two depends on ρ, the available redundancy across the servers, and can be reduced by increasing the storage capacity at the SBSs. The optimality of the proposed scheme with uncoded cache placement and MDS-coded server storage is also proved for successive transmissions.
AU  - Mital,N
AU  - Gunduz,D
AU  - Ling,C
DO  - 10.1109/tcomm.2020.2991460
EP  - 4631
PY  - 2020///
SN  - 0090-6778
SP  - 4620
TI  - Coded caching in a multi-server system with random topology
T2  - IEEE Transactions on Communications
UR  - http://dx.doi.org/10.1109/tcomm.2020.2991460
UR  - https://ieeexplore.ieee.org/document/9082622
UR  - http://hdl.handle.net/10044/1/78938
VL  - 68
ER  -
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