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Cache Subsidies for an optimal memory for bandwidth tradeoff in the access network

Ahmadi, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1109/JSAC.2020.2971806
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2020
  4. Abstract:
  5. While the cost of the access network could be considerably reduced by the use of caching, this is not currently happening because content providers (CPs), who alone have the detailed demand data required for optimal content placement, have no natural incentive to use them to minimize access network operator (ANO) expenditure. We argue that ANOs should therefore provide such an incentive in the form of direct subsidies paid to the CPs in proportion to the realized savings. We apply coalition game theory to design the required subsidy framework and propose a distributed algorithm, based on Lagrangian decomposition, allowing ANOs and CPs to collectively realize the optimal memory for bandwidth tradeoff. The considered access network is a cache hierarchy with per-CP central office caches, accessed by all ANOs, at the apex, and per-ANO dedicated bandwidth and storage resources at the lower levels, including wireless base stations, that must be shared by multiple CPs. © 1983-2012 IEEE
  6. Keywords:
  7. Cache subsidy ; Caching ; Content distribution ; Network economics ; Bandwidth ; Game theory ; Cache hierarchies ; Central offices ; Coalition game ; Content providers ; Lagrangian decomposition ; Optimal content ; Storage resources ; Wireless base stations ; Cache memory
  8. Source: IEEE Journal on Selected Areas in Communications ; Volume 38, Issue 4 , 2020 , Pages 736-749
  9. URL: https://ieeexplore.ieee.org/document/8984323