Multicasting and broadcasting in undirected WDM networks

被引：0
|
作者：
Li, L [1 ]
Xu, YL [1 ]
Chen, GL [1 ]
Wan, YY [1 ]
机构：
[1] Univ Sci & Technol China, Dept Comp Sci, Natl High Performance Comp Ctr, Hefei 230026, Peoples R China
来源：
2001 INTERNATIONAL CONFERENCE ON COMPUTER NETWORKS AND MOBILE COMPUTING, PROCEEDINGS | 2001年
关键词：
multicast; WDM networks; set cover; group steiner tree; NP-Complete;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper addresses the problem of multicasting and broadcasting in undirected WDM networks. Given an undirected network G=(V,E) with a source nodes and a set of destination nodes D, Lambda is the set of wavelength that can be used in the network. Associated with every edge c, there is a set of available wavelengths on it. The multicast problem is to find a tree rooted at s including all nodes in D such that the cost of the tree is minimum in terms of the cost of wavelength conversion at nodes and the cost of using wavelength on edges. This paper proves that the multicast problem is NP-Complete and can not be approximated within a constant factor unless P=NP. Then we construct an auxiliary graph for the original WDM networks and reduce the multicast problem to a group steiner tree problem on the auxiliary graph. Employing the known algorithm for the group steiner tree problem, we get an algorithm for our problem which delivers a solution within O(log(2)(nk)loglog(nk)logp) times the optimum.
引用
收藏
页码：467 / 472
页数：4
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