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Caching at the Edge: Outage Probability

Recayte, Estefania and Munari, Andrea (2021) Caching at the Edge: Outage Probability. IEEE Wireless Communications and Networking Conferences, virtually or physically in Nanjing, China. (In Press)

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Abstract

Caching at the edge of wireless networks is a key technology to reduce traffic in the backhaul link. However, a concentrated amount of requests during peak-periods may cause the outage of the system, meaning that the network is not able to serve the whole set of demands. The outage probability is a fundamental metric to take into account during the network design. In this paper, we derive the analytical expression of the outage probability as a function of the total amount of users requests, content distribution, cache size and capacity constraints on the backhaul resources. In particular, we focus on a scenario where end-users have no direct connection to the master node which holds the complete library of content that can be requested. A general formulation of the outage is derived and studied for two relevant caching schemes, i.e. the random caching scheme and the most popular caching schemes. The exact closed form expressions presented in this paper provide useful insights on how requests, memory and resources can be balanced when the parameters of a cache-enabled network have to designed.

Item URL in elib:https://elib.dlr.de/140517/
Document Type:Conference or Workshop Item (Speech)
Title:Caching at the Edge: Outage Probability
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Recayte, Estefaniaestefania.recayte (at) dlr.deUNSPECIFIED
Munari, AndreaAndrea.Munari (at) dlr.deUNSPECIFIED
Date:2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:In Press
Keywords:caching, outage probability, backhaul capacity, satellite networks
Event Title:IEEE Wireless Communications and Networking Conferences
Event Location:virtually or physically in Nanjing, China
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Multimedia Satellitennetze (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Institute of Communication and Navigation > Satellite Networks
Deposited By: Recayte, Estefania
Deposited On:21 Jan 2021 09:23
Last Modified:21 Jan 2021 09:23

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