Coded caching in a multi-server system with random topology
File(s)1712.00649.pdf (374.93 KB)
Accepted version
Publication available at
Author(s)
Mital, N
Gunduz, D
Ling, C
Type
Conference Paper
Abstract
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 base stations with limited storage capacity, user 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 a single server serving all the users simultaneously. 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 simultaneous transmission from the servers. It is shown that, with successive transmission the achievable average delivery latency is comparable to that achieved by a single server, while the gap between the two depends on ρ, the available redundancy across servers, and can be reduced by increasing the storage capacity at the SBSs.
Date Issued
2018-01-01
Online Publication Date
2018-01-01
2018-11-05T15:09:41Z
Date Acceptance
2017-12-15
ISBN
9781538617342
ISSN
1525-3511
Publisher
IEEE
Journal / Book Title
2018 IEEE Wireless Communications and Networking Conference (WCNC)
Copyright Statement
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Source Database
web-of-science
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000435542402086&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Source
IEEE Wireless Communications and Networking Conference (WCNC)
Subjects
Science & Technology
Technology
Computer Science, Hardware & Architecture
Computer Science, Theory & Methods
Engineering, Electrical & Electronic
Telecommunications
Computer Science
Engineering
Publication Status
Published
Start Date
2018-04-15
Finish Date
2018-04-18
Country
Barcelona, Spain
Date Publish Online
2018-06-11