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Proceedings Paper

Resource assignment in multi-granularity switching optical network
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Paper Abstract

Multi-granularity switching is an attractive technology, which can not only save the network cost but also realize traffic grooming. There are many different sizes tunnels available in multi-granularity optical network, so resource assignment becomes very important for lightpath establishment. In this paper, we focus on the research in waveband switching (WBS) network. Firstly the node structure and multi-granularity connections are analyzed, and the term of RRA (routing and resource assignment) is proposed to state the problem of lightpath establishment. And a kind of resource assignment policy for RRA is proposed according to the tunnel granularity. As a part of resource assignment in WBS network, the problem of waveband paths assignment is discussed and several new dynamic algorithms are proposed. They are SBP (shortest waveband path), FBP (first-fit waveband path), LBP (longest waveband path) and LBC (longest waveband combination) algorithms. In our numerical simulations, some factors that impact the performance of network are analyzed, such as waveband assignment algorithm, switching ratios and waveband partition. And also some useful conclusions are drawn, which are instructive for the design and implementation of multi-granularity network.

Paper Details

Date Published: 25 October 2004
PDF: 11 pages
Proc. SPIE 5598, Performance, Quality of Service, and Control of Next-Generation Communication Networks II, (25 October 2004); doi: 10.1117/12.571292
Show Author Affiliations
Hongsheng Song, Beijing Univ. of Posts and Telecommunications (China)
Xuan Gui, Beijing Univ. of Posts and Telecommunications (China)
Jie Zhang, Beijing Univ. of Posts and Telecommunications (China)
Wanyi Gu, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 5598:
Performance, Quality of Service, and Control of Next-Generation Communication Networks II
Frank Huebner; Robert D. van der Mei, Editor(s)

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