Converter placement supporting broadcast in WDM optical networks

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	Converter placement supporting broadcast in WDM optical networks
	Ruan, L ; Du, DZ ; Hu, XD; Jia, XH ; Li, DY ; Sun, Z
	2001-07-01
发表期刊	IEEE TRANSACTIONS ON COMPUTERS
ISSN	0018-9340
卷号	50 期号:7 页码:750-758
摘要	Given a WDM optical network with wavelength channels on its fiber links, we consider the problem of finding the minimum set of network nodes such that, with wavelength converters at these nodes, broadcast can be supported in the network. We call this problem the Converter Placement problem. We model a given network using a graph G with colors on its edges and give a mathematical formulation for the problem based on the graph model. Two related problems, Color-Covering and Vertex Color-Covering, are given and analyzed. Both of them are shown to have a polynomial-time approximation with performance ratio In n + 1 and Inn is the best possible performance ratio unless NP subset of DTIME(n(polylogn)), where n is the number of vertices in G. Using these results, we show that the Converter Placement problem has a polynomial-time approximation with performance ratio 2(ln n + 1) and (1)/(2)ln n is the best possible performance ratio unless NP subset of DTIME(n(polylogn)). We present an approximation algorithm to solve the Converter Placement problem and study the performance of the algorithm on randomly generated network topologies.
关键词	network optimization optical networks WDM converter placement Color-Covering Vertex Color-Covering
语种	英语
WOS研究方向	Computer Science ; Engineering
WOS类目	Computer Science, Hardware & Architecture ; Engineering, Electrical & Electronic
WOS记录号	WOS:000169945400011
出版者	IEEE COMPUTER SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/16669
专题	应用数学研究所
通讯作者	Ruan, L
作者单位	1.Univ Minnesota, Dept Comp Sci & Engn, Minneapolis, MN 55455 USA 2.Chinese Acad Sci, Inst Appl Math, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Appl Math, Beijing, Peoples R China 4.City Univ Hong Kong, Dept Comp Sci, Kowloon, Hong Kong, Peoples R China 5.Shandong Univ, Sch Math & Syst Sci, Jinan 250100, Peoples R China
推荐引用方式 GB/T 7714	Ruan, L,Du, DZ,Hu, XD,et al. Converter placement supporting broadcast in WDM optical networks[J]. IEEE TRANSACTIONS ON COMPUTERS,2001,50(7):750-758.
APA	Ruan, L,Du, DZ,Hu, XD,Jia, XH,Li, DY,&Sun, Z.(2001).Converter placement supporting broadcast in WDM optical networks.IEEE TRANSACTIONS ON COMPUTERS,50(7),750-758.
MLA	Ruan, L,et al."Converter placement supporting broadcast in WDM optical networks".IEEE TRANSACTIONS ON COMPUTERS 50.7(2001):750-758.