Exploring for Content Storage Mechanism of NDN

• 1、School of Information and Communication Engineering
• 2、Laboratory of Network System Architecture and Convergence, Beijing Univ. of Posts & Telecom(BUPT)，Beijing, China

Abstract：Continuously increasing size of current Internet user and their different requirements have brought great challenges to the Internet, and "content" itself is increasingly becoming the center of user need. Content sharing services, such as CDN, P2P networks, has brought tremendous pressure to the Internet and reduced the user's surfing experience, this uneven distribution of network bandwidth making service providers helpless. So the research for the next generation of content-centric networking emerged. For the current problems and status of IP network, like the content distribution becoming the Internet center, and the double identity of IP address, NDN (Named Data Networking) is proposed as the next-generation network architecture. The core of NDN is replacing the IP address layer by data name itself. In this paper, we considered and improved the default caching mechanism of NDN, which is each node on the return path caches the content. This paper is focused on the cached content (what), cache location (where), and cache replacement strategies (how to replace), and through the simulation and verification of cache hit ratio and other network indicators, the effectiveness of proposed strategies were proved.

Keywords： NDN CCN Content Storage Random Storage Content Popularity