Probabilistic Caching Strategy in Collaborative Small Cell Networks
Résumé
This paper will discuss the distributed caching strategies in
clustered heterogeneous cellular networks. Basically, there
are two obstacles to accomplish the caching policy in the
wireless access networks, i.e., the limited storage capaci-
ty of small cells and the too small coverage area of each
base station to imply content aggregation effect. Tradition-
ally, the existing caching strategies only concern the local
requests within one base station coverage, which neglects
the clustered characteristics of network infrastructure and
user traffic demand. In this paper, we consider a two-tier
clustered cellular networks, within which small cells can
exchange content to fulfill each user request. Intuitively,
this cooperation between base stations increases the service
capacity of clustered cellular networks as testified in our
numerical simulation.