Topology Optimization for Heterogeneous DHT-Based Multicast

H. Nguyen
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Abstract

Since the deployment of IP multicast remains restricted due to many practical and political issues, researchers have shifted focus to exploiting application-layer multicast for multicast data delivery. Recently there has been considerable interest in applying DHT routing algorithms to application-level multicast. However, early DHT-based multicast protocols are insufficient in addressing a number of technical issues such as heterogeneous capacity of nodes or node churn. In this chapter, the author describes a solution called BAM-Chord (i.e., Bandwidth Adaptive Multicast over Chord) that optimizes the topology of a multicast tree based on node bandwidth. In the proposed solution, node position (i.e., node identifier) on a BAM-Chord ring will be decided based on node bandwidth capacity such that it can build a wide and balanced multicast tree rooted at the source node. As a result, BAM-Chord protocol can utilize network resources of every node to reduce the depth of the multicast tree and take advantages of DHTs in maintaining the multicast tree.
异构dht组播拓扑优化
由于许多现实和政治问题限制了IP组播的部署,研究人员将重点转向利用应用层组播进行组播数据传输。最近,人们对将DHT路由算法应用于应用级组播产生了相当大的兴趣。然而,早期基于dht的多播协议在解决节点异构容量或节点混乱等技术问题方面存在不足。在本章中,作者描述了一个名为BAM-Chord(即,带宽自适应多播在Chord上)的解决方案,它基于节点带宽优化了多播树的拓扑结构。在本文提出的解决方案中,节点在BAM-Chord环上的位置(即节点标识符)将根据节点的带宽容量来确定,从而可以在源节点上构建一个广泛而均衡的多播树。因此,BAM-Chord协议可以利用每个节点的网络资源来减少组播树的深度,并利用dht来维护组播树。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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