Study On The Technology Of Software-defined Content Centric Networking

Content-Centric Networking(CCN) is one of active researching topics in the area of Future Internet which will adopt a more flexible content naming mechanism and a higher efficient distributive method named by content based addressing. CCN has been intended to up-grade greatly both the transmission efficiency of data delivery and users’ quality of experience by integrating into the distribution techniques of network caching. Its addressing approach is, however, not fully compatible to the current network architecture. Consequently, this thesis focuses on the practical deployment of CCN in a software defined manner for smooth evolution of the current network.Firstly, this thesis provides an analysis of both the mechanism and the features of CCN’s addressing and caching, a brief description of programmable architecture of Software Defined Networking(SDN) and its separation of control plane from data forwarding plane. The thesis gives also a summary of the existing CCN designing schemes based on SDN, presents a selection condition of the network simulation platform in-order-to verify the feasibility of SDN extensions.Then, this thesis proposes a software defined CCN architecture, called by SdCCN, including content naming, addressing, caching and proxying for connection control. The design covers the function of content request parsing, the mapping of name to tag, name addressing and a centralized cache managing. This thesis provides a content-to-tag mapping algorithm, a meta-data management algorithm, our extensions in the cache module of Open Flow switch, and the development of a simulation prototype based on Omnet++.Finally, the thesis designs three cases of SdCCN simulation, one for addressing test to verify the addressing function, one for caching test to trace the cache control process, and one for comprehensive function comparison test to CCN. The last one is used also to evaluate the feasibility of SdCCN by comparing the number of content copies. The simulation results show that our SdCCN design is a feasible solution to the smooth evolution to CCN of the existing network.