An Advanced Rarest-First Scheme used in mobile Layered P2P streaming

Layered P2P streaming has drawn great interest in mobile cellular network in recent years. As an important technology in this application, data scheduling plays a crucial role in achieving a high Quality of Service (QoS). The Rarest-First (RF) Scheme used in Layered P2P streaming has obtained a good performance in server load and throughput of peer nodes. However, it also brings some chanllenges, such as more interruption times and useless packets. In this paper, we propose a new data scheduling scheme based on the RF, named Advanced Rarest-First (A-RF) Scheme. It adds three new mechanisms to improve the QoS while maintaining the advantages of RF. Simulation result shows that our scheme is efficient at obtaining a better QoS performance with a small network cost.