Research on CCN cache algorithm under software definition
Leyuan REN, Junfang WANG, Xuemin ZHANG · DOAJ (DOAJ: Directory of Open Access Journals) · 2018
In order to solve the problems of caching in the content center network (CCN), based on the fusion architecture of content center network and software defined network (SDN), a method of CCN caching decision under the software definition is proposed, which makes full use of the advantages of global perception and centralized control in the control layer. The scheme considers betweenness centrality, content popularity, edge nodes and the limited storage of cache nodes at the same time, and it proposes the concepts of control node and communication node, so that the request contents can be cached reasonably at different nodes according to the controller's cache decision. Meanwhile, the shortest path to the user request is found based on the hops of the control node to the cache node and the server. Simulation experiments are carried out using ndnSIM, and the results show that this scheme can obviously improve the cache hit rate, reduce the path extension rate and cache replacement number compared with the traditional caching strategies of ALWAYS and LCD, and the scheme achieve the purpose of improving the efficiency of CCN caching, which is beneficial to the development of the content center network and the future network.