Utility-aware resource allocation for multi-stream overlay multicast

Ji Xu, Jiangchuan Liu, Hsiao Hwa Chen, Xiaowen Chu

研究成果: Conference contribution


Overlay multicast, which performs topology construction and data relaying in the application layer, has recently emerged as a promising vehicle for data distribution. In most of the existing systems, only a single stream is assumed for each overlay, and multiple streams, if needed, are distributed separately. In addition, while the overlay node performs relay functions, they generally do not filter the content to match the heterogeneous bandwidth constraints. We consider a more general model, in which a multicast session may consist of multiple data streams, such as video and audio, which are to be delivered to the same set of nodes. The services to these steams are elastic through layer dropping, shaping, or transcoding. In this paper, we focus on an important resource allocation problem in such an adaptive multi-stream multicast framework: Assume that each stream has an associated utility function, how to maximize the total utility of all the streams in a multicast session. The problem involves optimization not only in individual nodes, but also in the global overlay structure. We show that, given a total bandwidth of the streams, there is an efficient and optimal solution for the allocation problem at a single node. The problem however can be much more complicated in a hierarchical structure like tree. Yet we show that, if the utility is concave with bandwidth, i.e., the marginal improvement diminishes with bandwidth increase, then the upstream constraint can be ignored and a local optimal solution is simply the global optimal solution.

主出版物標題2007 IEEE International Conference on Communications, ICC'07
出版狀態Published - 2007
事件2007 IEEE International Conference on Communications, ICC'07 - Glasgow, Scotland, United Kingdom
持續時間: 2007 6月 242007 6月 28


名字IEEE International Conference on Communications


Other2007 IEEE International Conference on Communications, ICC'07
國家/地區United Kingdom
城市Glasgow, Scotland

All Science Journal Classification (ASJC) codes

  • 電腦網路與通信
  • 電氣與電子工程


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