Providing Hierarchical Lookup Service for P2P-VoD Systems
Supporting random jump in P2P-VoD systems requires efficient lookup for the "Best" suppliers, where "Best" means the suppliers should meet two requirements: content match and network quality match. Most studies use a DHT-based method to provide content lookup; however, these methods are neither able to meet the network quality requirements nor suitable for VoD streaming due to the large overhead. In this paper, the authors propose Mediacoop, a novel hierarchical lookup scheme combining both content and quality match to provide random jumps for P2P-VoD systems. It exploits the play position to efficiently locate the candidate suppliers with required data (content match), and performs refined lookup within the candidates to meet quality match.