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Title: Shared tree for application-layer multi-source multicast
Authors: Jia, Juncheng
Zhang, Qian
Keywords: Multi-source multicast
Shared tree solution
Group communication
Issue Date: Nov-2006
Citation: Proceedings IEEE Global Telecommunications Conference, GLOBESCOM 06, San Francisco, California, USA, 27 Nov.-1 Dec. 2006
Abstract: Group communication is becoming increasingly important with the decreasing cost of broadband access and the growing number of Internet users, which requires efficient multi-source multicast support. This paper targets at addressing two fundamental questions related to application-layer multi-source multicast: how many sources can be simultaneously served and how in reality can such a service be effectively provided. Considering the high bandwidth requirement and potential huge control overhead, in this paper we construct a single distribution tree shared by all the sources. Theoretically, we prove that the optimal single shared tree solution can serve at least m − 1 sources, where m is the maximum number of sources that can be supported in the system with any number of trees. Practically, we propose a distributed protocol for tree construction and tree refinement so as to approach the theoretical optimal. The simulation results manifest that our proposed heuristics protocol significantly increases the number of sources that can be served in multi-source sessions and the result approaches to the optimal solution.
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