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Abstract
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Multi layer networks are a very attractive solution to cope with the increasing dynamics and capacities in todays core networks. In SDH/SONET multi layer networks, client layer SDH/SONET connections are groomed to wavelength channels and transported using end-to-end lightpaths. Also, intermediate grooming can yield to a more efficient utilization of network resources. In contrast to many other IP-over- WDM network architectures, a clear and efficient evolutionary path exists to upgrade todays SDH/SONET networks based on point-to-point WDM links to dynamic SDH/SONET-WDM networks. In this paper, two principal SDH/SONET-WDM multi layer network architectures are investigated covering the dynamics either only in the electrical layer or in both layers, respectively. We present a detailed performance evaluation based on simulation studies and compare both architectures for different total network capacity and grooming strategies in order to show benefits and drawbacks for the introduction of dynamics in the optical plane of todays backbone networks. We also systematically analyze the traffic composition which until now has only rarely been investigated.
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Reference entry
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Köhn, M.
Comparison of SDH/SONET-WDM Multi Layer Networks with static and dynamic optical plane
Proceedings of the 9th Conference on Optical Network Design and Modelling (ONDM 2005), Milan, February 2005, pp. 403-412
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