Article (Scientific journals)
Edge-Caching Wireless Networks: Performance Analysis and Optimization
Vu, Thang Xuan; Chatzinotas, Symeon; Ottersten, Björn
2018In IEEE Transactions on Wireless Communications
Peer Reviewed verified by ORBi
 

Files


Full Text
TWC18Orbi.pdf
Author preprint (1.87 MB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Keywords :
Edge caching; energy efficiency; optimization
Abstract :
[en] Edge-caching has received much attention as an efficient technique to reduce delivery latency and network congestion during peak-traffic times by bringing data closer to end users. Existing works usually design caching algorithms separately from physical layer design. In this paper, we analyse edge-caching wireless networks by taking into account the caching capability when designing the signal transmission. Particularly, we investigate multi-layer caching where both base station (BS) and users are capable of storing content data in their local cache and analyse the performance of edge-caching wireless networks under two notable uncoded and coded caching strategies. Firstly, we calculate backhaul and access throughputs of the two caching strategies for arbitrary values of cache size. The required backhaul and access throughputs are derived as a function of the BS and user cache sizes. Secondly, closed-form expressions for the system energy efficiency (EE) corresponding to the two caching methods are derived. Based on the derived formulas, the system EE is maximized via precoding vectors design and optimization while satisfying a predefined user request rate. Thirdly, two optimization problems are proposed to minimize the content delivery time for the two caching strategies. Finally, numerical results are presented to verify the effectiveness of the two caching methods.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Vu, Thang Xuan  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
no
Language :
English
Title :
Edge-Caching Wireless Networks: Performance Analysis and Optimization
Publication date :
February 2018
Journal title :
IEEE Transactions on Wireless Communications
ISSN :
1558-2248
Publisher :
Institute of Electrical and Electronics Engineers, New York, United States - New York
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 28 February 2018

Statistics


Number of views
179 (20 by Unilu)
Number of downloads
247 (23 by Unilu)

Scopus citations®
 
69
Scopus citations®
without self-citations
51
WoS citations
 
58

Bibliography


Similar publications



Contact ORBilu