Imperial College London
Portrait Picture

ProfessorDenizGunduz

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor in Information Processing
 
 
 
//

Contact

 

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

 
 
//

Assistant

 

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

 
//

Location

 

1016Electrical EngineeringSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Yang:2019:10.1109/tcomm.2019.2929140,
author = {Yang, Q and Mohammadi, Amiri M and Gunduz, D},
doi = {10.1109/tcomm.2019.2929140},
journal = {IEEE Transactions on Communications},
pages = {7088--7102},
title = {Audience-retention-rate-aware caching and coded video delivery with asynchronous demands},
url = {http://dx.doi.org/10.1109/tcomm.2019.2929140},
volume = {67},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Most of the current literature on coded cachingfocus on a static scenario, in which a fixed number of userssynchronously place their requests from a content library, andthe performance is measured in terms of the latency in satisfyingall of these requests. In practice, however, users start watching anonline video content asynchronously over time, and often abortwatching a video before it is completed. The latter behaviour iscaptured by the notion of audience retention rate, which measuresthe portion of a video content watched on average. In order tobring coded caching one step closer to practice, asynchronoususer demands are considered in this paper, by allowing userdemands to arrive randomly over time, and both the popularityof video files, and the audience retention rates are taken intoaccount. A decentralized partial coded delivery (PCD) schemeis proposed, and two cache allocation schemes are employed;namely homogeneous cache allocation (HoCA) and heterogeneouscache allocation (HeCA), which allocate users’ caches amongdifferent chunks of the video files in the library. Numerical resultsvalidate that the proposed PCD scheme, either with HoCA orHeCA, outperforms conventional uncoded caching as well as thestate-of-the-art decentralized caching schemes, which consideronly the file popularities, and are designed for synchronousdemand arrivals. An information-theoretical lower bound on theaverage delivery rate is also presented.
AU  - Yang,Q
AU  - Mohammadi,Amiri M
AU  - Gunduz,D
DO  - 10.1109/tcomm.2019.2929140
EP  - 7102
PY  - 2019///
SN  - 0090-6778
SP  - 7088
TI  - Audience-retention-rate-aware caching and coded video delivery with asynchronous demands
T2  - IEEE Transactions on Communications
UR  - http://dx.doi.org/10.1109/tcomm.2019.2929140
UR  - http://hdl.handle.net/10044/1/71873
VL  - 67
ER  -
Download