A mesh-tree hybrid architecture for cost-effective CDN-P2P deployment

In recent years, a hybrid architecture that integrates both Content Delivery Network (CDN) and Peerto-Peer (P2P) technology has been proposed to compromise the merits of them. In many respects, the CDN-P2P hybrid architecture is an optimal option for streaming services. However, a satisfactory architecture with both flexibility and ease of management is still pending. Furthermore, most researches have never mentioned about how to calculate the CDN capacity to help operators measure the number of servers in deployment and thus to cut down operation and maintenance costs. In this paper, we firstly propose a mesh-tree hybrid architecture which offers advantages of both mesh and tree's. Secondly, we design a mechanism to manage node behavior in the CDN-P2P hybrid system to form the topology of CDN-P2P hybrid network. Finally, we raised a method to calculate CDN capacity in CDN-P2P hybrid architecture. In the simulation part, we deploy two kinds node behavior: users arrive at a constant rate and users arrive at following Poisson process while leave the system following exponential distribution, the results demonstrated that the proposed architecture together with node management mechanism can save up to 68.3% of CDN capacity in CDN-P2P hybrid system.