earticle

영어

Live video streaming becomes one of the most popular internet activities in the recent years. Along with its popularity, the problems such as scalability, availability and low-latency are still the main drawbacks of the peer-to-peer (P2P) live video streaming. The DHT-aided chunk-driven overlay (DCO) [3] tried to overcome these problems by using the Distributed Hash Table (DHT) in live video streaming. Even the performance of DCO is better than other traditional works such as tree-based system, in terms of vulnerability to churn, and mesh-based system, in terms of high delay and message overhead, there are some problems in DCO which need to be solved. The coordinator is easy to get overloaded by many requests because one coordinator is responsible for storing the chunk index of several segments. Moreover, the number of nodes that the video server is responsible for sending the video segment to are not clearly defined. To solve these problems, in this paper, a more efficient approach of using the coordinator nodes is proposed. Furthermore, the threshold is carefully calculated in order to use the server capacity efficiently. The server is only responsible for sending the video segment to the threshold nodes. After that, the video segment will be shared among nodes in the network until every node receives the video segment. The performance evaluation results show that our work is more efficient than DCO, and the server capacity can be used efficiently if the threshold is careful defined.