Abstract

The last decade has witnessed wide-scale deployment of optical networks to support the growing data traffic. This success can be traced back to advances in optical transmission systems such as dense wavelength-division multiplexing, Raman amplification, etc., which allow a single fiber to carry several wavelengths very far, while sharing expensive equipment. However,these cutting-edge technologies require careful placement of amplifiers and other network elements to ensure error-free propagation of the signal and to minimize costs. In practice, it is common to use a set of constraints to ensure valid configurations for deployment. It is nontrivial to identify the optimal configuration under all but the simplest constraints. In this paper,we consider a set of constraints with varying flexibilities and present algorithms for efficiently computing the cost-optimal configuration under them. We also present experimental and theoretical results to evaluate the various constraints and algorithms.

© 2003 IEEE

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Other (14)

W. J. Goralski, SONET, 2 ed. New York: McGraw-Hill, 2000.

S. Clavenna, (2002) 40-Gig forecast. [Online]. Available: http://www.lightreading.com

"Long Haul Transport and Optical Networks-North America Market Forecast", RHK, 2001.

F. Forghieri, R. Tkach and A. R. Chraplyvy, "Fiber nonlinearities and their impact on transmission systems,"in Optical Fiber Telecommunications, San Diego, CA: Academic, 1997,vol. III-A,ch. 8.

B. Sanso, and P. Soriano, Eds. Telecommunications Network Planning, Norwell, MA: Kluwer Academic, 1999.

H. Zang, J. P. Jue and B. Mukherjee, "A review of routing and wavelength assignment approaches for wavelength-routed optical WDM networks", SPIE Optical Networks Mag., vol. 1, no. 1, Jan 2000.

O. Hauser, M. Kodialam and T. V. Lakshman, "Capacity design for fast path restorable optical networks", presented at the INFOCOM, 2002.

T. E. Stern and K. Bala, Multiwavelength Optical Networks: A Layered Approach, Reading, MA: Addison-Wesley, 1999 .

B. Ramamurthy and B. Mukherjee, "Wavelength conversion in WDM networks", IEEE J. Select. Areas Commun., vol. 16, pp. 1061-1073, Sept. 1998.

B. Mukherjee, S. Ramamurthy, D. Banerjee and A. Mukherjee, "Some principles for designing a wide-area optical network", presented at the INFOCOM, June 1994.

M. Alicherry, S. Gogate, H. Nagesh and V. Poosala, "Optimal configuration of optical line system under various constraints", presented at the ECOC, Sept 2002.

B. Ramamurthy, J. Iness and B. Mukherjee, "Minimizing the number of optical amplifiers needed to support a multiwavelength optical MAN/WAN", presented at the INFOCOM, 1997.

R. Ramaswami and K. N. Sivarajan, Optical Networks: A Practical Perspective, San Francisco, CA: Morgan Kaufmann, 1998.

T. Cormen, C. Leiserson and R. Rivest, Introduction to Algorithms, Cambridge, MA: MIT Press, 1990.

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