  Content-centric networking (CCN) introduces a paradigm shift from a host
centric to an information centric communication model for future Internet
architectures. It supports the retrieval of a particular content regardless of
the physical location of the content. Content caching and content delivery
networks are the most popular approaches to deal with the inherent issues of
content delivery on the Internet that are caused by its design. Moreover,
intermittently connected mobile environments or disruptive networks present a
significant challenge to CCN deployment. In this paper, we consider the
possibility of using mobile users in improving the efficiency of content
delivery. Mobile users are producing a significant fraction of the total
Internet traffic, and modern mobile devices have enough storage to cache the
downloaded content that may interest other mobile users for a short period too.
We present an analytical model of the CCN framework that integrates a delay
tolerant networking architecture into the native CCN, and we present
large-scale simulation results. Caching on mobile devices can improve the
content retrieval time by more than 50%, while the fraction of the requests
that are delivered from other mobile devices can be more than 75% in many
cases.
