Cost Effective Caching in Content Centric Networking

Abstract

Content Centric Networking (CCN) is a new networking architecture aims to address current challenges faced by TCP/IP architecture. Motivation behind idea of CCN is to avoid repeated delivery of same content (information). CCN avoids sending of same content again and again by caching the sending content at some intermediate node (router). In CCN architecture each node has storage capacity to cache the propagating content. By caching content at intermediate nodes, CCN stops requests to reach to original server of that content. The intermediate node, having requested content in its cache, can directly serve further requests for same content, acting as server. Hence all requests not necessarily reach to original server and that's how considerable amount of bandwidth is saved. To cache content, there is need of algorithm to select subset of nodes among available, to serve new incoming requests for longer time. In our research work we proposed an Cost Effective Caching algorithm which selects eligible node based on their remaining capacity left to cache more content. The main motivation behind proposing this algorithm is to cache content at a node which has enough storage left to cache the content. We implemented and compared performance of this scheme with respect to existing ones and results are showing that this algorithm significantly improves performance of network.