Modeling analysis of server loading in large-scale P2P-VoD systems with actively collaborative helpers

作者：Zhang, Yubao; Wang, Hui^*; Li, Pei; Jiang, Zhihong

来源：Telecommunication Systems, 2013, 54(3): 215-227.

DOI：10.1007/s11235-013-9729-7

• Peer-to-peer
• Video-on-demand
• Server loading
• Helper

Through moving a significant fraction of uploading from the servers to the peers, using P2P approach can effectively alleviate server loading in VoD deployments. However, users' asynchronism dilutes their ability to assist each other. We develop a theoretical model to conduct an in-depth study of average server loading in large-scale P2P-VoD systems. This model captures many of the essential features of average server loading in large-scale P2P-VoD systems. Based on the in-depth study on average server loading, we introduce actively collaborative helpers into systems for alleviating server loading. The model of peers is further developed to a hybrid model for studying the optimal download amount of helpers from perspective of the entire network including peers and helpers. We show there exactly exists the sweet point of download amount of homogeneous helpers. With downloading the sweet amount, helpers can contribute the bandwidth around twice than they consume, when they do not assist each other, and even approximately 4 times when they assist each other.

• 出版日期2013-11
• 单位中国人民解放军国防科学技术大学