sNDN: a Social-aware Named Data Framework for Cooperative Content Retrieval via D2D Communications

Abstract

In this paper, we advocate cooperative content retrieval , a novel and content-centric service paradigm via device-to-device (D2D) communications to reduce cellular traf fi c volume and to facilitate user wireless connectivity in mobile networks. By leveraging the Named Data Networking (NDN) principle, we propose sNDN ,a social-aware NDN framework to achieve ef fi cient cooperative con- tent retrieval. Speci fi cally, sNDN introduces Friendship Circle by grouping a user with her close friends of high physical proximity and content similarity. We construct NDN routing tables condi- tioned on Friendship Circle encounter frequency to navigate con- tent requests and content deliveries between Friendship Circles, and leverage social properties in Friendship Circle to search for the fi nal target as inner-Friendship Circle routing. The evaluation results demonstrate that sNDN outperforms other content retrieval schemes signi fi cantly.