TE-Friendly Content Delivery Request Routing in a CDN

Abstract

Content Delivery over Internet is optimized for low user perceived latency by designing specialized Content Delivery Networks (CDN). Request Routing systems in CDNs generally achieve low user latency by balancing the server load and selecting the nearest server. Although Traffic engineering is another factor that impacts the client latency, which is not generally integrated with the Request Routing. In this paper we proposed a CDN architecture that employs a TE-Friendly Request Routing (TFRR) system, which not only distributes the server load but also achieves network efficiency by balancing the path loads. We also presented a detailed TFRR system design and an algorithm to perform the TFRR function. Our simulation results show that the proposed CDN with our TFRR algorithm achieves both server and traffic load balancing.