NDLI: Outage and delay performance of content caching in two-tier cooperative cellular networks

Content Provider	IET Digital Library
Author	Ghadi, Farshad Rostami Javan, Mohammad Reza
Abstract	The authors consider a content-centric two-tier heterogeneous cellular network where the macro base stations (MBSs) and small base stations (SBSs) are spread based on two independent Poisson point processes. The set of contents are stored in the MBSs while a subset of the contents which are the most popular are cached in the SBSs. We assume that there is no direct link between the MBSs and the users, and users send their content requests to their nearest SBS. If the SBS has not the requested content, the nearest MBS to the serving SBS serves the user through that SBS. Furthermore, the authors incorporated the automatic repeat request (ARQ)-based transmission with a fixed number of the ARQ rounds, and analyse the delay experienced by users. The authors obtained closed-form expressions for the average outage probability and the average delay in case of successful ARQ transmission. It is shown that the content distribution based on popularity decreases the average outage probability and average delay. Also, it is shown that the transmission from MBS to the user through SBS improves the performance in terms of average outage probability and average delay. Finally, using simulations the authors study the proposed schemes for different network parameters.
Starting Page	2492
Ending Page	2499
Page Count	8
ISSN	17518628
Volume Number	13
e-ISSN	17518636
Issue Number	Issue 16, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/13/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.5496
Journal	IET Communications
Publisher Date	2019-06-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	ARQ Transmission Automatic Repeat Request Automatic Repeat Request-based Transmission Average Delay Performance Average Outage Probability Cellular Radio Content Caching Performance Content Distribution Content-centric Two-tier Heterogeneous Cellular Network Cooperative Communication Independent Poisson Point Processes Macrobase Stations MBS Mobile Radio System Probability Protocol SBS Small Base Stations Statistics Stochastic Linearised SCUC Two-tier Cooperative Cellular Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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