Cellular Traffic Offloading with Optimized Compound Single-point Unicast and Cache-based Multipoint Multicast

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Abstract

We consider an optimal cache-placement-and-delivery-policy where traffic is offloaded from Single-Point Unicast (SPUC) service by using network-level Orthogonal Multipoint Multicast (OMPMC) scheme. The files are classified into two sets. The most popular files are cached at the BSs using a probabilistic approach and are served by OMPMC. The remaining files are fetched from the core network on demand and served by SPUC. Optimal compound scheme is analyzed, based on resource allocation between OMPMC and multi-antenna SPUC schemes. If a user is not able to successfully receive the requested file due to its experienced signal-to-interference-plus-noise ratio, its request is in outage. A closed-form expression is derived for the total outage probability based on stochastic geometry for the compound scheme. An optimization problem is formulated to design the caching policy for the compound scheme. The optimal solution to this problem is obtained by finding optimal cache placement, bandwidth allocation, and file classification. Simulation results show that the compound scheme outperforms other caching schemes in terms of the total outage probability.
Original languageEnglish
Title of host publication2022 IEEE Wireless Communications and Networking Conference (WCNC)
PublisherIEEE
Pages2268-2273
Number of pages6
ISBN (Electronic)978-1-6654-4266-4
DOIs
Publication statusPublished - 16 May 2022
MoE publication typeA4 Article in a conference publication
EventIEEE Wireless Communications and Networking Conference - Austin, United States
Duration: 10 Apr 202213 Apr 2022

Conference

ConferenceIEEE Wireless Communications and Networking Conference
Abbreviated titleWCNC
Country/TerritoryUnited States
CityAustin
Period10/04/202213/04/2022

Keywords

  • Wireless caching
  • compound cache delivery policy
  • multipoint multicasting
  • parametric optimization problem.

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