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{Mohammadi:2018:10.1109/TCOMM.2017.2751608,
author = {Mohammadi, Amiri M and Gunduz, D},
doi = {10.1109/TCOMM.2017.2751608},
journal = {IEEE Transactions on Communications},
pages = {370--381},
title = {Cache-aided content delivery over erasure broadcast channels},
url = {http://dx.doi.org/10.1109/TCOMM.2017.2751608},
volume = {66},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A cache-aided broadcast network is studied, in which a server delivers contents to a group of receivers over a packet erasure broadcast channel (BC). The receivers are divided into two sets with regards to their channel qualities: the weak and strong receivers, where all the weak receivers have statistically worse channel qualities than all the strong receivers. The weak receivers, in order to compensate for the high erasure probability they encounter over the channel, are equipped with cache memories of equal size, while the receivers in the strong set have no caches. Data can be pre-delivered to weak receivers’ caches over the off-peak traffic period before the receivers reveal their demands. Allowing arbitrary erasure probabilities for the weak and strong receivers, a joint caching and channel coding scheme, which divides each file into several subfiles, and applies a different caching and delivery scheme for each subfile, is proposed. It is shown that all the receivers, even those without any cache memories, benefit from the presence of caches across the network. An information theoretic trade-off between the cache size and the achievable rate is formulated. It is shown that the proposed scheme improves upon the state-of-the-art in terms of the achievable trade-off.
AU  - Mohammadi,Amiri M
AU  - Gunduz,D
DO  - 10.1109/TCOMM.2017.2751608
EP  - 381
PY  - 2018///
SN  - 0090-6778
SP  - 370
TI  - Cache-aided content delivery over erasure broadcast channels
T2  - IEEE Transactions on Communications
UR  - http://dx.doi.org/10.1109/TCOMM.2017.2751608
UR  - http://hdl.handle.net/10044/1/50660
VL  - 66
ER  -
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