A Study on the Impact of Delayed Packet Forwarding in Content-Centric Networking

Recently, Content-Centric Networking (CCN) has been extensively studied by networking researchers as a promising network architecture to realize an information-centric network. In CCN, to reduce the amount of redundant Interest and Data packet transmissions, routers can aggregate multiple Interest packets requesting the identical content into a single packet. In the literature, the effect of Interest packet aggregation at CCN router on the performance has been investigated. In this paper, we analyze the impact of delayed packet forwarding at routers on the performance of CCN. With delayed packet forwarding, every router does not immediately forward the Interest packet; instead, it intentionally delays packet forwarding by a fixed amount of time. We analytically derive the content delivery delay with and without delayed packet forwarding at routers to reveal the impact of delayed packet forwarding.