An Efficient Content Distribution Network Architecture Using Heterogeneous Channels

With the popularization and development of the IoT(Internet of Things), more and more data needs to be transmitted over the Internet, which leads to the deterioration of network quality. The CDN (Content Distribution Network) technology is an important theoretical model to ensure network QoS (Quality of Service). To improve the QoS, we extend current CDN system to the hierarchical CDN system, that traditional CDN system is just a special case of hierarchical CDN system. In the traditional CDN system and the hierarchical CDN system, by analyzing the bandwidth between subsystems, we found the inter-system bandwidth is the bottleneck that impedes CDN system expansion. To address this problem, a new kind of distributed system architecture is proposed in this paper. This new architecture uses broadcast channels to distribute broadcast type data and still using bidirection uni-cast channels for other type of data, so we call the new architecture as CHCDN (Channel Heterogeneous CDN) in this paper. The new architecture is analyzed and compared with the traditional CDN system architecture and hierarchical CDN system architecture. Moreover, the experimental simulation result has shown that the CHCDN system features better in real-time cache updating and features with higher data transmission efficiency than the hierarchical CDN system, which indicating that the new architecture has great potential for being widely used in distributed computing.