Demand-Aware Cooperative Content Caching in 5G/6G Networks With MEC-Enabled Edges

Abstract

Today, billions of smart devices are interconnected via wireless networks, leading to large volumes of video contents circulating through the bandwidth-limited backhaul. This causes network performance to deteriorate. As a mitigation mechanism, caching of highly popular contents to network edges is deployed. We propose a cooperative and demandaware caching strategy, which is modelled using the Separable Assignment Problem, to maximize the cache hit ratio. This problem is solved with a recursive enumeration method, where dynamic programming is used to fill each edge. The extensive application-level evaluations show that the proposed strategy outperforms existing caching policies.

Digital twin driven and intelligence enabled content delivery in end-edge-cloud collaborative 5G networks

“…At the beginning of each cache period, the ENSP will announce a service fee for content n and the service fee is fixed for the whole cache period. Intuitively, for cache period l, the ENSP sets the service fee as a linear function of the average AoI that all user requests for content n can achieve in cache period l. 4 For cache period l, the average AoI of content n, denoted by A n (l), is expressed as…”

“…The work in [3] maximized cache hit rate by proposing a two-step framework, in which a suitable coding scheme was adopted first, and then a joint cache placement and recommendation decision algorithm based on the decision-making game was developed. The work in [4] modelled the hit-rate maximization problem as a separable assignment problem and solved it by a recursive enumeration method. The work in [5] studied the edge caching strategies considering the content delivery and Y. Yi and G. Zhang are with the College of Information Science and Technology, Donghua University, Shanghai, China (e-mails: yuhanyi@mail.dhu.edu.cn, glzhang@dhu.edu.cn).…”

“…We assume that if the request is raised before the ENSP purchases the content or after the ENSP releases its cache, the ENSP responds to the request by fetching the content from the CPs, which is out of the scope of this paper 4. Our proposed algorithm can still work if a different setting of the service fee is used, because the form of the service fee does not affect the algorithm design.…”