Hybrid architecture of content delivery network (CDN) and peer-to-peer (P2P) is a promising network technology enabling effective real-time streaming services. It complements the advantages of quality control and reliability in CDN and the scalability in the P2P system. With real-time streaming services, however, high connection setup and media delivery latency are becoming the critical issues to deploy the CDN-P2P system. These issues result from biased peer selection without location awareness and content awareness and lead to significant service disruption. To reduce service disruption latency, we propose a group-based CDN-P2P hybrid architecture (G-CP2P), which is a location/content-aware peer selection. Specifically, a SuperPeer performs a location-aware peer selection by employing a content addressable network (CAN) to distribute channel information. It also manages peers with content awareness, forming a group of peers with the same channel as the sub-overlay. Through the performance evaluation, we prove that the proposed architecture has better performance than the original CDNP2P hybrid architecture in terms of connection setup delay and media delivery time.
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