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Proceedings Paper

Traffic grooming with span constraints in WDM optical networks
Author(s): Fengqing Liu; Qingji Zeng
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Paper Abstract

In WDM optical networks, a low speed traffic is often multiplexed or switched into a high speed lightpaths. In common measures, a lightpath established in traffic grooming does not consider transmission impairment. It transports traffic optically as long as possible. But optical medium is not ideal, transmission impairment like ASE noise, which degrades the signal to noise ratio, exists. To maintain an acceptable SNR level at the receiver side, the number of optical amplifiers in a lightpath should not exceed a Maximum value (M). A segment between two optical amplifiers referred as a span. In this paper, we adds span constraints to the traffic grooming problem, and present an heuristic algorithm to bring up a series of lightpaths explicitly to accommodate such traffic. From the numerical result, it could be found that it guarantees each traffic to be successfully routed. It also achieves good performance of wavelength efficiency and lightpath efficiency.

Paper Details

Date Published: 19 November 2008
PDF: 10 pages
Proc. SPIE 7137, Network Architectures, Management, and Applications VI, 713718 (19 November 2008); doi: 10.1117/12.804167
Show Author Affiliations
Fengqing Liu, Nanjing Univ. of Posts and Telecommunications (China)
Qingji Zeng, Shanghai Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 7137:
Network Architectures, Management, and Applications VI
Weisheng Hu; Shoa-Kai Liu; Ken-ichi Sato; Lena Wosinska, Editor(s)

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