CPDID: A Novel CDN-P2P Dynamic Interactive Delivery Scheme for Live Streaming

Although many streaming application providers have relied on CDN services, there are several barriers to making CDN a more common service: expensive construction cost and fixed service mode. The rise of cloud computing requires "CDN as a Service" with a more open service mode, which requires content services available on-demand and be utilized in an open and loosely-coupled fashion. In most of the current streaming systems, CDN provides serve requesters with a passive and static state, there is no dynamic interaction with P2P systems, so the total CDN-P2P-Hybrid efficiency is not high. In this paper, we present CPDID: a CDN-P2P Dynamic Interactive Delivery scheme for Live Streaming. We explore CPDID architecture based on REST interface and JSON message format. And then we propose an identifying and selecting \´upload amplification nodes\´ algorithm to more efficiently utilize CDN resource. Our experimental results show that CPDID achieves at least 10-25% performance improvement compared with the existing native CDN-P2P-Hybrid schemes. At last, we analyze the prospective research direction and propose our future work.