An Architecture of Content-Centric Networking over Protocol-Oblivious Forwarding

Traditional Internet based on the IP routing has an innate deficiency when facing up with large numbers of concurrent distribution of video and other media content. Software-Defined Networking (SDN) and OpenFlow protocol try to improve data transfer efficiency and flexibility by separating the forwarding layer and control layer, and the content-based routing idea proposed by Content-Centric Networking (CCN), provides a possible direction for the evolution of the Internet. However, the current implementations of SDN-based CCN still rely on IP-based routing and lack of engineering realization. Protocol-Oblivious Forwarding (POF) protocol is an extension on OpenFlow protocol, supporting any network layer packet with user-defined format. A new content-centric network architecture POF- CCN is designed and implemented in this paper. Guided route principle and Bloom Filter structure are adopted in POF-CCN, to condense the content cache name into a limited size so as to look up content quickly. A prototype system is deployed in real network environment and test results prove the feasibility of the architecture.