RWA in the Presence of Wavelength Conversion in WDM Networks
Blocking probability has been one of the key performance indexes in the design of wavelength-routed all-optical WDM networks. Existing research has demonstrated that an effective Routing and Wavelength Assignment (RWA) algorithm and wavelength conversion are two primary vehicles for improving the blocking performance.. The Weighted least-congestion routing and first-fit wavelength assignment (WLCR-FF) algorithm considers both the current traffic load and the route lengths jointly. In this paper, Numerical study was conducted over ring and mesh-torus and NSFNET topology. A comparison was made between WLCR-FF and a wide variety of existing routing algorithms like static routing, fixed-alternate routing and least-loaded routing. The results conclusively demonstrate that the WLCR-FF algorithm can achieve much better blocking performance in the presence of sparse or/and full wavelength conversion.
I. Chlamtac, A. Ganz, and G. Karmi, “Lightpath Communications: An Approach to High Bandwidth Optical WANs,” IEEE Trans, Commun., vol. 40, no. 7, July 1992, pp. 1171–82.
M. Kovacevic and A. Acampora, “Benefits of Wavelength Translation in All-Optical Clear-Channel Networks,” IEEE JSAC, vol. 14, no. 5, June 1996, pp. 868–80.
B. Ramamurthy and B. Mukherjee, “Wavelength Conversion in WDM Networking,” IEEE JSAC, vol. 16, no. 7, Sept. 1998, pp. 1061–73.
Y. Zhu, G. N. Rouskas, and H. G. Perros, “A Comparison of Allocation Policies in Wavelength Routing Networks,” Photonic Net. Commun. J.,vol. 2, no. 3, Aug. 2000, pp. 265–93.
R. A. Barry and P. A. Humblet, “Models of Blocking Probability in All-Optical Networks with and without Wavelength Changers,” IEEE JSAC,vol. 14, no. 5, June 1996, pp. 858–67.
K. Chan and T. P. Yum, “Analysis of Least Congested Path Routing in WDM Lightwave Networks,” Proc. IEEE INFOCOM ’94, 1994, pp. 962–69.
X.-W. Chu and B. Li, “A Dynamic RWA Algorithm in a Wavelength-Routed All-Optical Network with Wavelength Converters,” Proc. IEEE INFOCOM ’03, Apr. 2003.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.