Research on QoS routing algorithm of CDN

The paper introduces a new method for improving quality of routing service in content delivery networks(CDN). The technology of jointing optimization of replica placement and distributed user request redirection is given. In the model, different content has different latency bound requirements. The solution is dynamic in the sense that replicas are added and removed from content delivery networks servers according to the dynamically changing user request traffic. The results show that the proposed solution is capable of decrease access delay and improve the quality of service.