LR2: Improving Push-Based Live Streaming and File Sharing in Peer-to-Peer Network

Random scheduling strategy has been emphasized and recommended in push-based P2P streaming systems due to its simplicity and high efficiency, and so is the latest first strategy in file sharing systems. However, how to take advantage of the low playout delay feature in the latest first strategy and the high playout probability feature in the random strategy still remains open. In this paper, we propose the LR2 strategy, which incorporates a segmented chunk selection strategy and a random push strategy. Compared with existent strategies, the LR2 strategy has higher playout probability and lower playout delay in live streaming, and has shorter last finish time in file sharing. On the other hand, live streaming and file sharing are unified into the same modeling framework in our strategy, and we think it can provide fundamental insights into studies on the integrated optimization of live streaming and file sharing in P2P network.