Cache-Assisted Content Delivery in Wireless Networks: A New Game Theoretic Model

Chao Fang, Changtong Liu, Zhuwei Wang, Yang Sun, Wei Ni, Peng Li, Song Guo

Research output: Journal article publicationJournal articleAcademic researchpeer-review


With the rapid increase of mobile data traffic, efficient
content delivery in wireless networks is increasingly important
to provide broadcast and multicast services. To reduce network
cost and enrich end-user quality of experience, Internet service
providers (ISPs) and content providers (CPs) are expected to
collaborate to improve content delivery services. However, the
influence of content popularity has been generally overlooked, and
profit split problem between ISPs and CPs has not been studied.
We investigate the novel economic behaviors between ISPs and
CPs in the presence of edge caches, and formulate the profit split
problem as a centralized model, which can achieve optimal content caching and maximal network benefits. A Stackelberg game is designed to obtain its distributed win–win solution, where a feasible backward induction is proposed and the influence of edge caches and content popularity is analyzed. Simulation results show that the performance of our proposed Stackelberg game model is comparable to the centralized alternative and much better than existing ISP-CP cooperative schemes not considering cache deployment in the network.
Original languageEnglish
Article number2
Pages (from-to)2653-2664
JournalIEEE Systems Journal
Issue number2
Publication statusPublished - Jun 2021

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