Exploiting path diversity in Content Delivery Network with the collaboration of SDN

Content Delivery Networks (CDNs) are able to improve user-oriented application performance through caching and anycast routing or DNS-based user mapping mechanism. With the fact that BGP is widely used for inter autonomous system (AS) routing for CDNs, there is a middle mile bottleneck problem, which cause by the nature limitation of BGP. To solve this problem, we propose an SDN-based tunnel multi-path system, CDN-Detour, which can detour the bottleneck for CDN to improve user experience.