Cellular Network Caching Based on Multipoint Multicast Transmission

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Abstract

We consider an optimal cache-placement-and-delivery-policy using Network-level Orthogonal Multipoint Multi-casting (OMPMC) for wireless networks. The placement of files in caches of Base Station (BS) is based on a probabilistic model, with controlled cache placement probabilities. File delivery is based on
multipoint multicast and network-based orthogonal transmission; all BSs in the network caching a file transmit it synchronously in dedicated radio resources. If the average signal-to-noise ratio associated to a file at a requesting user is less than a threshold, the request is in outage. We derive a closed-form expression for the outage probability for a network modeled as a Poisson Point Process. An optimal caching policy is solved from an optimization problem, and compared to a threshold-based policy, suboptimal partial solutions, and single-point cache delivery. Simulation results show that exploiting OMPMC with optimal cache and
bandwidth allocation significantly improves the overall outage probability as compared to single point delivery.
Original languageEnglish
Title of host publicationIEEE Global Communications Conference
PublisherIEEE
Publication statusAccepted/In press - Dec 2020
MoE publication typeA4 Article in a conference publication
EventIEEE Global Communications Conference - Taipei, Taiwan, Republic of China
Duration: 7 Dec 202011 Dec 2020

Publication series

NameIEEE Global Communications Conference
ISSN (Print)2334-0983
ISSN (Electronic)2576-6813

Conference

ConferenceIEEE Global Communications Conference
Abbreviated titleGLOBECOM
CountryTaiwan, Republic of China
CityTaipei
Period07/12/202011/12/2020

Keywords

  • Wireless caching
  • cache placement and delivery policy
  • multipoint multicast transmission

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